1. The control device for the disinfectant liquid manufacturing machine is characterized by comprising a power supply control circuit, a processor and a constant current circuit, wherein the power supply control circuit is used for being connected with a power supply, the processor is connected with the power supply control circuit, the power supply control circuit is connected with the constant current circuit, and the constant current circuit is connected with an electrode of the disinfectant liquid manufacturing machine and outputs constant current to the electrode.

2. The disinfectant solution manufacturing machine control device according to claim 1, further comprising a voltage detection circuit, wherein said voltage detection circuit is used for connecting said electrode, detecting the voltage across said electrode and sending said voltage to said processor, and said voltage detection circuit is connected to said processor.

3. The disinfectant solution manufacturing machine control apparatus of claim 2, wherein said processor is configured to adjust electrolysis time based on a voltage across said electrode.

4. The disinfectant liquid manufacturing machine control device according to claim 2, wherein the power control circuit comprises a first control switch, a second control switch and a first resistor, a control end of the first control switch is connected to the processor, a first end of the first control switch is used for connecting to a power supply through the first resistor, a second end of the first control switch is grounded, a control end of the second control switch is connected to a common end of the first resistor and the first end of the first control switch, a first end of the second control switch is used for connecting to a power supply, and a second end of the second control switch is connected to the constant current circuit.

5. The disinfectant solution manufacturing machine control device according to claim 4, wherein said power control circuit further comprises a second resistor and a third resistor, said processor is connected to the control terminal of said first control switch through said second resistor, a first terminal of said third resistor is connected to a common terminal of said first resistor and said first terminal of said first control switch, and a second terminal of said third resistor is connected to the control terminal of said second control switch.

6. The disinfectant solution manufacturing machine control device according to claim 4, wherein the constant current circuit comprises a constant current chip and a constant current peripheral circuit, the constant current chip is connected to the second end of the second control switch and is connected to the electrode, and the peripheral circuit is connected to the constant current chip.

7. The disinfectant preparing machine control device according to claim 6, wherein the constant current peripheral circuit includes a first capacitor, a second capacitor, a diode, an inductor and a fourth resistor, the input pin and the enable pin of the constant current chip are both connected to the second end of the second control switch, the switch pin of the constant current chip is connected to the second end of the second control switch through the inductor, the switch pin of the constant current chip is further connected to the anode of the diode, the cathode of the diode is connected to the first end of the first capacitor, the second end of the first capacitor is grounded, the first end of the second capacitor is connected to the second end of the second control switch, the second end of the second capacitor is grounded, the output voltage pin of the constant current chip is connected to the anode of the electrode, the feedback voltage pin of the constant current chip is connected to the cathode of the electrode, the first end of the fourth resistor is connected with a feedback voltage pin of the constant current chip, and the second end of the fourth resistor is grounded.

8. The disinfectant solution manufacturing machine control apparatus according to claim 7, wherein said voltage detection circuit comprises an electrode positive terminal voltage detection circuit and an electrode negative terminal voltage detection circuit, said electrode positive terminal voltage detection circuit is connected to the positive electrode of said electrode, said electrode negative terminal voltage detection circuit is connected to the negative electrode of said electrode, and said electrode positive terminal voltage detection circuit and said electrode negative terminal voltage detection circuit are both connected to said processor.

9. The disinfectant solution manufacturing machine control device according to claim 8, wherein said electrode negative terminal voltage detection circuit comprises a fifth resistor, a first terminal of said fifth resistor is connected to a negative electrode of said electrode, and a second terminal of said fifth resistor is connected to said processor;

the electrode positive terminal voltage detection circuit comprises a sixth resistor, a seventh resistor and an eighth resistor, the seventh resistor and the eighth resistor are connected in series, one end of the seventh resistor is connected with the anode of the electrode after the seventh resistor and the eighth resistor are connected in series, the other end of the seventh resistor is grounded, the first end of the sixth resistor is connected with the common end of the seventh resistor and the eighth resistor, and the second end of the sixth resistor is connected with the processor.

10. A disinfectant liquid producing machine comprising an electrode and the disinfectant liquid producing machine control apparatus according to any one of claims 1 to 9.

Background

Along with the improvement of living standard and living quality of people, people pay more and more attention to the problem of environmental sanitation, and sterilization and disinfection become daily requirements of people. The demand for disinfecting liquid is increasing, and the demand for disinfecting liquid manufacturing machines is also increasing. The disinfectant liquid making machine adds salt in water, then uses electrode to electrolyze dilute saline water to produce sodium hypochlorite, the sodium hypochlorite further hydrolyzes nascent oxygen, the nascent oxygen has strong oxidability, and then kills virus and plays the role of disinfection and sterilization.

In order to adapt to different disinfection occasions, solutions with different effective chlorine contents need to be prepared. However, the electrolytic device of part of the disinfectant manufacturing machine is small in size, when the electrolytic device is used for preparing disinfectant, the temperature of a saline solution cannot be fixed, the installation and positioning of the electrolytic sheet have certain deviation, and the size of the electrolytic sheet has certain deviation, so that the concentration of the saline solution prepared by a user is inconsistent with the target concentration, the expected disinfection effect cannot be achieved, and the traditional disinfectant manufacturing machine is low in use reliability.

Disclosure of Invention

The invention provides a disinfectant liquid manufacturing machine control device and a disinfectant liquid manufacturing machine, aiming at the problem of low use reliability of the traditional disinfectant liquid manufacturing machine.

A control device for a disinfectant manufacturing machine comprises a power supply control circuit, a processor and a constant current circuit, wherein the power supply control circuit is used for being connected with a power supply, the processor is connected with the power supply control circuit, the power supply control circuit is connected with the constant current circuit, and the constant current circuit is connected with an electrode of the disinfectant manufacturing machine and outputs constant current to the electrode.

A disinfectant liquid manufacturing machine comprises an electrode and the disinfectant liquid manufacturing machine control device.

The control device for the disinfectant producing machine and the disinfectant producing machine comprise a power supply control circuit, a processor and a constant current circuit, wherein the power supply control circuit is used for being connected with a power supply, the processor is connected with the power supply control circuit, the power supply control circuit is connected with the constant current circuit, and the constant current circuit is connected with an electrode of the disinfectant producing machine and outputs constant current to the electrode. The processor controls the power supply control circuit to enable electric energy accessed by the power supply control circuit to be transmitted to the constant current circuit, the constant current circuit outputs constant current to the electrode after being electrified, and current deviation caused by electrode technology and installation of the disinfectant preparation device under different temperature working conditions of solution is reduced, so that the precision of the effective chlorine concentration in the prepared disinfectant is improved, the prepared disinfectant can achieve the expected disinfection effect, and the use reliability of the disinfectant manufacturing machine is improved.

In one embodiment, the control device for disinfectant liquid manufacturing machine further comprises a voltage detection circuit, wherein the voltage detection circuit is used for being connected with the electrode, detecting the electrode voltage of the electrode and sending the electrode voltage to the processor, and the voltage detection circuit is connected with the processor.

In one embodiment, the processor is configured to adjust the electrolysis time based on the electrode voltage.

In one embodiment, the power control circuit includes a first control switch, a second control switch and a first resistor, a control end of the first control switch is connected to the processor, a first end of the first control switch is used for connecting to a power supply through the first resistor, a second end of the first control switch is grounded, a control end of the second control switch is connected to a common end of the first resistor and the first end of the first control switch, a first end of the second control switch is used for connecting to the power supply, and a second end of the second control switch is connected to the constant current circuit.

In one embodiment, the power control circuit further includes a second resistor and a third resistor, the processor is connected to the control terminal of the first control switch through the second resistor, a first terminal of the third resistor is connected to a common terminal of the first resistor and the first terminal of the first control switch, and a second terminal of the third resistor is connected to the control terminal of the second control switch.

In one embodiment, the constant current circuit comprises a constant current chip and a constant current peripheral circuit, the constant current chip is connected with the second end of the second control switch and the electrode, and the peripheral circuit is connected with the constant current chip.

In one embodiment, the constant current peripheral circuit includes a first capacitor, a second capacitor, a diode, an inductor, and a fourth resistor, an input pin and an enable pin of the constant current chip are both connected to the second end of the second control switch, a switch pin of the constant current chip is connected to the second end of the second control switch through the inductor, a switch pin of the constant current chip is further connected to an anode of the diode, a cathode of the diode is connected to the first end of the first capacitor, the second end of the first capacitor is grounded, the first end of the second capacitor is connected to the second end of the second control switch, the second end of the second capacitor is grounded, an output voltage pin of the constant current chip is connected to the anode of the electrode, a feedback voltage pin of the constant current chip is connected to the cathode of the electrode, and a first end of the fourth resistor is connected to the feedback voltage pin of the constant current chip, and the second end of the fourth resistor is grounded.

In one embodiment, the voltage detection circuit comprises a positive electrode terminal voltage detection circuit and a negative electrode terminal voltage detection circuit, the positive electrode terminal voltage detection circuit is connected with the positive electrode of the electrode, the negative electrode terminal voltage detection circuit is connected with the negative electrode of the electrode, and the positive electrode terminal voltage detection circuit and the negative electrode terminal voltage detection circuit are both connected with the processor.

In one embodiment, the electrode negative terminal voltage detection circuit comprises a fifth resistor, wherein a first terminal of the fifth resistor is connected with the negative electrode of the electrode, and a second terminal of the fifth resistor is connected with the processor;

the electrode positive terminal voltage detection circuit comprises a sixth resistor, a seventh resistor and an eighth resistor, the seventh resistor and the eighth resistor are connected in series, one end of the seventh resistor is connected with the anode of the electrode after the seventh resistor and the eighth resistor are connected in series, the other end of the seventh resistor is grounded, the first end of the sixth resistor is connected with the common end of the seventh resistor and the eighth resistor, and the second end of the sixth resistor is connected with the processor.

Drawings

FIG. 1 is a block diagram of a control device for a disinfectant manufacturing machine according to an embodiment;

FIG. 2 is a block diagram showing the construction of a disinfectant manufacturing machine control apparatus according to another embodiment;

fig. 3 is a schematic structural diagram of a control device of a disinfectant liquid manufacturing machine according to an embodiment.

Detailed Description

In order to make the purpose, technical solution and advantages of the present application more apparent, the present application is described more fully below by way of examples and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In one embodiment, please refer to fig. 1, a control device for a disinfectant manufacturing machine is provided, which includes a power control circuit 200, a processor 100 and a constant current circuit 300, wherein the power control circuit 200 is used for connecting a power source, the processor 100 is connected to the power control circuit 200, the power control circuit 200 is connected to the constant current circuit 300, and the constant current circuit 300 is connected to an electrode of the disinfectant manufacturing machine and outputs a constant current to the electrode. The processor 100 controls the power supply control circuit 200 to transmit the electric energy accessed by the power supply control circuit 200 to the constant current circuit 300, the constant current circuit 300 outputs constant current to the electrode after being electrified, and current deviation caused by electrode process and installation of the disinfectant preparation device under different temperature working conditions of solution is reduced, so that the precision of the effective chlorine concentration in the prepared disinfectant is improved, the prepared disinfectant can achieve the expected disinfection effect, and the use reliability of the disinfectant manufacturing machine is improved.

Specifically, solutions with different effective chlorine contents can be applied to different disinfection occasions, for example, when the surfaces of general objects are disinfected, disinfectant with the effective chlorine content of 250mg/L is adopted to disinfect the surfaces of various clean objects, disinfectant with the effective chlorine content of 400-800 mg/L is adopted to disinfect the surfaces of various non-clean objects, the disinfectant with different concentrations in the effective chlorine content of 250-800mg/L can be selected to disinfect according to the difference between disinfection time and disinfection objects, and the like, and the method for using the disinfectant can be specifically referred to the national standard GB28233-2-2020 (sanitary requirement for sodium hypochlorite generators). Therefore, the disinfectant manufacturing machine needs to manufacture disinfectant with different effective chlorine contents so as to meet the disinfection requirements of various occasions. The disinfectant is manufactured and when manufacturing the disinfectant, the principle is that dilute brine is electrolyzed, sodium hypochlorite is produced, the sodium hypochlorite further hydrolyzes nascent oxygen, the nascent oxygen has extremely strong oxidability, viruses are killed, and the chemical equation of the reaction is as follows: NaCL + H2O ═ NaCLO + H2 ≠ H. The formula for calculating the available chlorine concentration at a fixed salt solution concentration is as follows:

M＝A*I*H*η/L (1)

where M is the effective chlorine concentration of the preparation solution, a is the theoretical preparation factor, which is a constant, typically 1.39 x 0.953, i (a) is the electrolysis current, η is the current efficiency, typically between 30-40%, L is the solution volume, and H is the electrolysis time. It can be understood that the effective chlorine concentration is closely related to the electrolytic current, and the current is influenced by various uncontrollable factors such as the concentration of a salt solution, the temperature of the solution, the installation distance of an electrolytic sheet, the size deviation of the electrolytic sheet, the power supply voltage and the like when the disinfectant is prepared, so that the electrolytic current is inaccurate and even fluctuates, and the precision of the effective chlorine concentration in the prepared disinfectant is reduced. The constant current circuit 300 outputs constant current to the electrodes after being electrified, and current deviation caused by electrode technology and installation of the disinfectant preparation device under the working conditions of different temperatures of the solution is reduced, so that the precision of the concentration of effective chlorine in the prepared disinfectant is improved, the prepared disinfectant can achieve the expected disinfection effect, and the use reliability of the disinfectant manufacturing machine is improved.

The processor 100 may be a central controller already provided in the disinfectant manufacturing machine itself, and corresponding functions are added to the original central controller, so that the hardware cost is reduced. Or a separate processor 100 can be additionally arranged to avoid affecting the functions of the original disinfectant manufacturing machine, as long as the function is realized by the technical personnel in the field. The power control circuit 200 is connected to the power source and the processor 100, and may transmit the power accessed from the power source to the constant current circuit 300 or not transmit the power accessed from the power source to the constant current circuit 300 under the control of the processor 100. The processor 100 can control the power on/off of the constant current circuit 300 by controlling the power supply control circuit 200.

The structure of the power control circuit 200 is not exclusive, and in this embodiment, the power control circuit 200 may include a switch, one end of the switch is connected to the power supply, the other end of the switch is connected to the constant current circuit 300, and the switch is further connected to the processor 100. When the processor 100 controls the switch to be closed, the constant current circuit 300 is connected to a power supply, and the power supply starts to work. When the processor 100 controls the switch to be turned off, the constant current circuit 300 turns off the power supply and stops working. Processor 100 may control the operating state of power control circuit 200 by sending high and low levels to power control circuit 200. It is understood that in other embodiments, the structure of the power control circuit 200 may be other, as long as one skilled in the art can realize the structure.

The constant current circuit 300 enters a constant current working state after being connected with electric energy, the constant current circuit 300 supplies power to the electrodes, and the electrodes electrolyze saline water after being electrified to generate sodium hypochlorite to form disinfectant. In this embodiment, the constant current circuit 300 provides a constant current to the electrodes, so that the electrolytic current of the electrodes is kept constant, and the influence of other factors on the electrolytic current is reduced, thereby being beneficial to improving the precision of the effective chlorine content in the prepared disinfectant. The structure of the constant current circuit 300 is not exclusive, and in general, when the constant current circuit 300 includes a constant current chip, the constant current chip may control the voltage output to the electrodes to be kept constant. The constant current can be calculated by the constant voltage and the resistance value of the divider resistor at the electrode where the constant current circuit 300 outputs current, so that the disinfectant with chlorine content concentration matched with the constant current is obtained. It can be understood that the divider resistor can be a slide rheostat, when the disinfectant manufacturing machine needs to manufacture disinfectant with different effective chlorine content concentrations, the slide rheostat can be arranged at different resistance positions to obtain different constant currents, so that the electrodes are electrolyzed by adopting different currents in different application occasions to obtain disinfectant with different effective chlorine content concentrations, the situation that the divider resistor needs to be frequently replaced is avoided, and the application range of the disinfectant manufacturing machine control device is expanded. Further, the constant current circuit 300 is further connected to the processor 100, and the processor 100 may obtain a current output voltage of the constant current circuit 300, and calculate a constant current according to the output voltage of the constant current circuit 300 and the resistance value of the voltage dividing resistor, so as to facilitate subsequent control.

In one embodiment, referring to fig. 1, the control device for a disinfectant manufacturing machine further includes a voltage detection circuit 400, the voltage detection circuit 400 is used for connecting electrodes, detecting electrode voltages of the electrodes and sending the electrode voltages to the processor 100, and the voltage detection circuit 400 is connected to the processor 100. The voltage detection circuit 400 can detect the voltage of the electrode and then send the voltage to the processor 100, the electrode voltage is the voltage at the electrode, and the processor 100 can perform subsequent control based on the electrode voltage, thereby expanding the function of the control device of the disinfectant manufacturing machine.

In one embodiment, the processor 100 is configured to adjust the electrolysis time based on the electrode voltage. After the processor 100 obtains the electrode voltage, the solution concentration can be obtained according to the voltage, and then the electrolysis time can be adjusted according to the solution concentration. Specifically, in this embodiment, after acquiring the voltage of the electrode, the processor 100 may calculate the resistance value of the solution in the disinfectant manufacturing machine according to the constant current output by the constant current circuit 300, and then may obtain the solution concentration according to the functional relationship N ═ f (R1) + B between the resistance value and the salt solution concentration, where N is the solution concentration, f (R1) is a functional expression of the resistance value and the solution concentration, and B is a constant. In an extensible manner, the specific functional relationship f (R1) can be corrected by experimental data measurement, and the correction process includes: different salt solution concentrations were prepared and the fixed electrode was placed in water. And (3) applying a fixed voltage U to the two electrodes, testing the current I flowing through the electrodes, and calculating the resistance value of the aqueous solution through U/I. And the resistance value and the concentration of the aqueous solution are drawn into corresponding relation curves, and then functional relation fitting is carried out through a mathematical tool. The formula (1) is a formula for calculating the effective chlorine concentration at a fixed concentration. When the concentration of the salt solution changes, the following formula can be deduced to correct the available chlorine content.

M1＝N*A*I*H*η/L (2)

N is the concentration of the solution, and as can be seen from the formula (2), after N changes, the electrolytic electrolysis time can be adjusted by calculating through the processor 100, and the magnitude of the constant current output to the electrode can be adjusted through the constant current circuit 300, so that the purpose of accurately controlling the concentration of the effective chlorine is achieved.

Alternatively, after the processor 100 obtains the electrode voltage, the electrolysis time may be adjusted directly according to the comparison result between the electrode voltage and the preset voltage threshold. For example, when the processor 100 obtains that the electrode voltage is greater than the preset voltage threshold, it determines that the current electrode voltage is large and the working load of the electrode is large, and may shorten the electrolysis time, control the electrode to reduce the working strength or stop the electrolysis, and avoid further damage to the electrode.

In one embodiment, referring to fig. 3, the power control circuit 200 includes a first control switch, a second control switch and a first resistor R19, a control terminal of the first control switch is connected to the processor 100, a first terminal of the first control switch is used for connecting to a power supply through the first resistor R19, a second terminal of the first control switch is grounded, a control terminal of the second control switch is connected to a common terminal of the first resistor R19 and the first terminal of the first control switch, a first terminal of the second control switch is used for connecting to the power supply, and a second terminal of the second control switch is connected to the constant current circuit 300.

Specifically, the control terminal of the first control switch is connected to the processor 100, the first terminal of the first control switch is used for accessing a power supply through the first resistor R19, the second terminal of the first control switch is grounded, and the processor 100 sends a high level or a low level to the control terminal of the first control switch to control whether the first control switch is turned on. When the first control switch is turned on, the power supply is turned on to ground through the first resistor R19 and the first control switch, and at this time, the voltage of the control terminal of the second control switch changes from high level to low level, the second control switch is turned on, and the power supply supplies power to the constant current circuit 300 through the second control switch. The constant current circuit 300 starts to work after being electrified, and provides constant current to the electrodes, and the electrodes electrolyze the saline water with the constant current. The types of the first control switch and the second control switch are not exclusive, and in this embodiment, the first control switch is a transistor Q1, which functions as a control circuit switch and can amplify the current. The second control switch is a MOS transistor PMOS1, and has the advantages of energy conservation, good thermal stability, good flexibility and the like. It is understood that in other embodiments, the first control switch and the second control switch may be of other types as long as one skilled in the art can realize the control.

In an embodiment, referring to fig. 3, the power control circuit 200 further includes a second resistor R6 and a third resistor R4, the processor 100 is connected to the control terminal of the first control switch through the second resistor R6, a first terminal of the third resistor R4 is connected to the common terminal of the first resistor R19 and the first terminal of the first control switch, and a second terminal of the third resistor R4 is connected to the control terminal of the second control switch. The processor 100 is connected to the control terminal of the first control switch through the second resistor R6, and the second resistor R6 is connected in series to the control terminal of the first control switch, so that the effects of blocking the current and reducing the current of the control terminal of the first control switch can be achieved, and the current of the control terminal of the first control switch can work in a stable range, thereby ensuring the reliable stability of the work of the first control switch and the circuit. The first end of the third resistor R4 is connected with the common end of the first resistor R19 and the first end of the first control switch, the second end of the third resistor R4 is connected with the control end of the second control switch, and the third resistor R4 is connected in series with the control end of the second control switch, so that the situation that surrounding components are broken down due to the fact that the switching speed of the second control switch is too high under high voltage can be avoided, and the effect of protecting a circuit is achieved. It is understood that in other embodiments, the power control circuit 200 may have other structures, as long as the implementation is considered by those skilled in the art.

In one embodiment, referring to fig. 3, the constant current circuit 300 includes a constant current chip and a constant current peripheral circuit, the constant current chip is connected to the second terminal of the second control switch and connected to the electrode, and the peripheral circuit is connected to the constant current chip. When the second control switch is switched on, the electric energy at the power supply is transmitted to the constant current chip through the second control switch, so that the constant current chip is electrified to generate constant current to the electrode. The peripheral circuit is connected with the constant current chip, and guarantees are provided for stable operation of the constant current chip. Specifically, the selection of the constant current chip is not exclusive, and for example, the constant current chip may be a constant current DC/DC current converter with the model number AP3130, and the constant current DC/DC current converter has the functions of current limiting protection, over-temperature protection, under-voltage protection, overvoltage protection and the like, and is safe and reliable to use. The structure of the constant current peripheral circuit is not exclusive as long as it is considered by those skilled in the art to be realizable.

In one embodiment, referring to fig. 3, the constant current peripheral circuit includes a first capacitor C6, a second capacitor C5, a diode D2, an inductor L1, and a fourth resistor R2, the input pin VIN and the enable pin EN of the constant current chip are both connected to the second terminal of the second control switch, the switch pin SW of the constant current chip is connected to the second terminal of the second control switch through the inductor L1, the switch pin SW of the constant current chip is further connected to the anode of the diode D2, the cathode of the diode D2 is connected to the first terminal of the first capacitor C6, the second terminal of the first capacitor C6 is grounded, the first terminal of the second capacitor C5 is connected to the second terminal of the second control switch, the second terminal of the second capacitor C5 is grounded, the output voltage pin VOUT of the constant current chip is connected to the anode of the electrode, the feedback voltage pin FB of the constant current chip is connected to the cathode of the electrode, the first terminal of the fourth resistor R2 is connected to the feedback voltage pin FB of the constant current chip, the second terminal of the fourth resistor R2 is connected to ground.

Specifically, an input pin VIN and an enable pin EN of the constant current chip are both connected with a second end of the second control switch, when the second control switch is switched on, the power supply provides electric energy for the input pin VIN and the enable pin EN of the constant current chip through the second control switch, and at the moment, the constant current module works in a constant current state. The switch pin SW of the constant current chip is connected with the second end of the second control switch through the inductor L1, the switch pin SW of the constant current chip is further connected with the anode of the diode D2, the cathode of the diode D2 is connected with the first end of the first capacitor C6, the second end of the first capacitor C6 is grounded, the first end of the second capacitor C5 is connected with the second end of the second control switch, and the second end of the second capacitor C5 is grounded, wherein the first capacitor C6, the second capacitor C5 and the inductor L1 play a role in filtering, and the diode D2 plays a role in one-way current limiting, so that the working performance of the constant current chip is improved.

The first end of the fourth resistor R2 is connected to the feedback voltage pin FB of the constant current chip, and the second end of the fourth resistor R2 is grounded. The voltage of the feedback voltage pin FB of the constant current chip is maintained at a fixed value, such as 0.3V. When the voltage is higher than 0.3V, the constant current chip automatically reduces the output voltage, when the voltage is lower than 0.3V, the constant current chip automatically increases the output voltage, and the current passing through the electrolyte is kept constant all the time through the adjustment of the constant current chip. The constant current is: i is U_{Constant temperature}/R,U_{Constant temperature}Is 0.3V, R is electricityThe resistance of the fourth resistor R2 in the circuit can be adjusted by adjusting the resistance of the fourth resistor R2 according to actual settings, thereby adjusting the output current.

The specific constant current principle is as follows: the feedback voltage pin FB of the constant current chip detects voltage, when the voltage of a feedback port of the feedback voltage pin FB is larger than 0.3V, the current is larger than a set value, and at the moment, the constant current chip enables the output voltage of the output voltage pin VOUT of the constant current chip to be reduced through internal adjustment. The output voltage pin VOUT of the constant current chip outputs voltage, at the moment, current flows to the positive electrode of the electrode, passes through the saline solution, then reaches the negative electrode of the electrode, and then flows to the ground through the fourth resistor R2. When the voltage at the output voltage pin VOUT of the constant current chip decreases, the current flowing through the fourth resistor R2 inevitably decreases, and when the feedback voltage at the feedback voltage pin FB of the constant current chip is equal to 0.3V, the output voltage at the output voltage pin VOUT of the constant current chip is fixed. When the feedback voltage at the feedback voltage pin FB of the constant current chip is lower than 0.3V, the output voltage is increased by the constant current chip until the feedback voltage at the feedback voltage pin FB of the constant current chip reaches 0.3V, and then the voltage adjustment is stopped.

In one embodiment, referring to fig. 2-3, the voltage detection circuit 400 includes an electrode positive terminal voltage detection circuit 410 and an electrode negative terminal voltage detection circuit 420, the electrode positive terminal voltage detection circuit 410 is connected to the positive electrode of the electrode, the electrode negative terminal voltage detection circuit 420 is connected to the negative electrode of the electrode, and both the electrode positive terminal voltage detection circuit 410 and the electrode negative terminal voltage detection circuit 420 are connected to the processor 100. The electrode positive end voltage detection circuit 410 is used for detecting the voltage at the positive electrode of the electrode and sending the voltage to the processor 100, the electrode negative end voltage detection circuit 420 is used for detecting the voltage at the negative electrode of the electrode and sending the voltage to the processor 100, and the processor 100 can obtain the voltage drop at the electrode, namely the voltage drop of the solution in the middle of the electrode, according to the voltage at the positive electrode of the electrode and the voltage at the negative electrode of the electrode, so that a basis is provided for the subsequent calculation of the concentration of the solution and the like. The accuracy of the obtained electrode voltage can be improved by using the electrode positive terminal voltage detection circuit 410 and the electrode negative terminal voltage detection circuit 420 to detect the voltage at the positive electrode of the electrode and the voltage at the negative electrode of the electrode, respectively.

In one embodiment, referring to fig. 2-3, the negative electrode terminal voltage detection circuit 420 includes a fifth resistor R3, a first terminal of the fifth resistor R3 is connected to the negative electrode of the electrode, a second terminal of the fifth resistor R3 is connected to the processor 100, the positive electrode terminal voltage detection circuit 410 includes a sixth resistor R5, a seventh resistor R7 and an eighth resistor R8, the seventh resistor R7 and the eighth resistor R8 are connected in series, one terminal of the series is connected to the positive electrode of the electrode, the other terminal of the series is connected to ground, a first terminal of the sixth resistor R5 is connected to the common terminal of the seventh resistor R7 and the eighth resistor R8, and a second terminal of the sixth resistor R5 is connected to the processor 100.

Specifically, the electrode negative terminal voltage detecting circuit 420 includes a fifth resistor R3, a first terminal of the fifth resistor R3 is connected to the negative terminal of the electrode, i.e., a first terminal of the fourth resistor R2, and a second terminal of the fifth resistor R3 is connected to the processor 100. When the current generated by the constant current passes through the anode and the cathode of the electrode, the current flows through the fourth resistor R2, the voltage is regenerated at the upper end of the fourth resistor R2, the generated divided voltage is fed back to the processor 100 through the fifth resistor R3, specifically, the generated divided voltage can be fed back to the AD detection port of the processor 100, and the voltage of the cathode of the electrode can be obtained through the AD detection of the processor 100 and the calculation of the processor 100.

The electrode positive terminal voltage detection circuit 410 comprises a sixth resistor R5, a seventh resistor R7 and an eighth resistor R8, wherein the seventh resistor R7 and the eighth resistor R8 are connected in series, one end of the series connection is connected with the positive electrode of the electrode, the other end of the series connection is grounded, a first end of a sixth resistor R5 is connected with the common end of the seventh resistor R7 and the eighth resistor R8, and a second end of the sixth resistor R5 is connected with the processor 100. The positive electrode voltage is divided by the seventh resistor R7 and the eighth resistor R8, the voltage division function is to prevent the processor 100 from being burnt out due to the fact that the positive electrode voltage is too high, the positive electrode voltage is divided by the seventh resistor R7 and the eighth resistor R8 and then fed back to the processor 100 through the sixth resistor R5, specifically fed back to an AD detection port of the processor 100, and the positive electrode voltage can be obtained through AD detection of the processor 100 and calculation of the processor 100. It is understood that in other embodiments, the structures of the positive electrode terminal voltage detection circuit 410 and the negative electrode terminal voltage detection circuit 420 may be other structures as long as the realization is considered by those skilled in the art.

For a better understanding of the above embodiments, the following detailed description is given in conjunction with a specific embodiment. In one embodiment, referring to fig. 1-3, the control device of the disinfectant manufacturing machine is provided with a constant current circuit 300 to solve the problem that the current deviation caused by the electrode process and installation of the disinfectant manufacturing machine under different temperature working conditions of the solution causes the deviation of the effective chlorine concentration in the prepared disinfectant. For example, the relationship between the salt solution concentration and the electrolysis current can be seen in table 1.

The resistance value of the saline solution can be converted by means of the constant current circuit 300 and measuring the voltage difference between the two ends of the electrode, the concentration of the saline solution can be obtained due to the fact that the concentration of the saline solution is in a direct proportion relation with the resistance value, and then the constant current time is adjusted through the processor 100.

Concentration of salt solution	Current value after constant voltage
		2g/20ml	0.191A
3g/20ml	0.235A
		4g/20ml	0.281A
5g/20ml	0.303A
		6g/20ml	0.350A
7g/20ml	0.361A
		8g/20ml	0.403A

TABLE 1

Specifically, the disinfectant manufacturing machine control device comprises a power supply control circuit 200, a processor 100, a constant current circuit 300 and a voltage detection circuit 400, wherein the processor 100 is a CPU, and the working principle comprises:

the CPU controls the power supply control circuit 200 to be powered on through an IO port of a power supply control end, the power supply control circuit 200 comprises a first control switch, a second control switch, a first resistor R19, a second resistor R6 and a third resistor R4, the constant current circuit 300 enters a constant current working state after being powered on, the constant current circuit 300 comprises a constant current chip, which can be a chip AP3130, the constant current circuit 300 further comprises an inductor L1, a first capacitor C6, a second capacitor C5, a diode D2 and a fourth resistor R2, and electrodes are connected with constant current through the constant current circuit 300 to electrolyze solution. In order to keep the current constant in the working process of the constant current circuit 300, the voltage of the pin FB of the chip AP3130 is maintained at 0.3V, when the voltage is higher than 0.3V, the circuit automatically reduces the output voltage, when the voltage is lower than 0.3V, the chip AP3130 automatically increases the output voltage, and the current passing through the electrolyte is kept constant all the time through the adjustment of the constant current circuit 300. The constant current is: i is U_{Constant temperature}/R,U_{Constant temperature}Is 0.3V, and R is the resistance of a fourth resistor R2 in the circuit for setting the current. The output current can be adjusted by adjusting the resistance of the fourth resistor R2 according to actual settings.

The CPU measures the voltage U1 of the positive electrode of the electrode plate in real time through the electrode positive end voltage detection circuit 410, and the partial voltage on the electrode plate can be calculated due to the constant current. The resistance value of the solution was obtained from R1 ═ (U1-U2)/I. Where R1 is the resistance of the salt solution, U1 is the voltage of the positive pole of the motor blade, U2 is the voltage of the negative pole of the electrode blade, and I is the current (this is the actual required (set current) of the circuit). The solution concentration can be calculated from the functional relationship between the resistance value and the concentration of the salt solution, where N is the solution concentration, f (R1) is a function of the resistance value and the solution concentration, and B is a constant.

The specific functional relationship of f (R1) can be modified by experimental data measurements. The correction process comprises the following steps: different salt solution concentrations were prepared and the fixed electrode was placed in water. And (3) applying a fixed voltage U to the two electrodes, testing the current I flowing through the electrodes, and calculating the resistance value of the aqueous solution through U/I. And the resistance value and the concentration of the aqueous solution are drawn into corresponding relation curves, and then functional relation fitting is carried out through a mathematical tool.

Formula 1 is a calculation formula of the concentration of the salt solution under the fixed concentration, and when the concentration of the salt solution changes, the effective chlorine content can be corrected by the derivation formula (2).

M1＝N*A*I*H*η/L (2)

Where M1 is the effective chlorine concentration of the prepared solution, N is the saline solution correction factor, a is the theoretical preparation factor, is a constant, typically 1.39 x 0.953, i (a) is the electrolysis current, η is the current efficiency, typically between 30-40%, L is the solution volume, and H is the electrolysis time. As can be seen from the formula 2, after N is changed, the purpose of accurately controlling the concentration of the effective chlorine can be achieved by calculating and adjusting the electrolysis time through the CPU.

In the embodiment, data calculation is adopted as a specific case. The data can also be solidified in the program through experimental tests, and the program can control the data automatically. In particular, the electrolysis time required for different salt solution concentrations to reach the target effective chlorine concentration is tested under a fixed current. Then, the resistance of the solution is tested and calculated through the processor 100, and the corresponding relation between the resistance and the concentration of the salt solution is called through a process sequence to adjust the electrolysis time, so that the effective chlorine concentration of the electrolytic solution meets the effective chlorine concentration set by a user under the condition of different salt solutions.

Taking the first control switch as the transistor Q1 and the second control switch as the MOS transistor PMOS1PMOS1 as an example, the specific principle of the circuit operation is described in detail as follows:

the power control port IO outputs a high level, and the transistor Q1 is turned on. The power BAT is turned on to ground through R19 and Q1, when the voltage at the left end of R4 changes from high to low, and PMOS1 is turned on. Power BAT is turned on through PMOS1 to power AP 3130. When the power supply BAT supplies power to the VIN port and the EN port of the chip AP3130 through the PMOS1, the constant current circuit 300 operates in a constant current state, specifically, the constant current principle is that the FB port of the chip AP3130 detects voltage, when the voltage of the FB feedback port is greater than 0.3V, it indicates that the current is greater than a set value, and at this time, the chip reduces the output voltage of the VOUT port through internal adjustment. The output voltage of VOUT, the current reaches the negative pole of the electrode after flowing to the positive pole of the electrode through the saline solution, and then flows to the ground through R2. When the voltage of the chip VOUT port drops, the current flowing through R2 is reduced. When the FB feedback voltage is equal to 0.3V, the output voltage of the chip VOUT is fixed. When the FB feedback is lower than 0.3V, the chip AP3130 increases the output voltage to instruct the FB feedback port to stop the voltage regulation after reaching 0.3V.

The voltage detection circuit 400 comprises R8, R7 and R5, the voltage of the positive electrode of the electrode is divided by a voltage dividing resistor R8 and R7 (the voltage dividing function is to prevent the burning out of the CPU caused by the overhigh voltage of the positive electrode of the electrode), the voltage is fed back to an AD detection port of the CPU of the controller through R5, and the voltage of the positive electrode of the electrode can be obtained through the AD detection of the CPU and the calculation of the CPU.

Similarly, when the current flows through R2, the voltage is regenerated at the upper end of R2, the generated voltage is fed back to the AD detection port of the CPU through R3, and the voltage of the negative electrode of the electrode can be obtained through the AD detection of the CPU and the calculation of the CPU. Through detecting antiseptic solution concentration in the antiseptic solution manufacturing machine, the user can learn when antiseptic solution reaches disinfection's concentration in the antiseptic solution manufacturing machine, avoids the user to use because of antiseptic solution concentration is not enough and leads to the disinfection bactericidal effect unsatisfactory, avoids excessive ionization to lead to the life of manufacturing machine to reduce.

The control device for the disinfectant manufacturing machine comprises a power supply control circuit 200, a processor 100 and a constant current circuit 300, wherein the power supply control circuit 200 is used for connecting a power supply, the processor 100 is connected with the power supply control circuit 200, the power supply control circuit 200 is connected with the constant current circuit 300, and the constant current circuit 300 is connected with the electrodes of the disinfectant manufacturing machine and outputs constant current to the electrodes. The processor 100 controls the power supply control circuit 200 to transmit the electric energy accessed by the power supply control circuit 200 to the constant current circuit 300, the constant current circuit 300 outputs constant current to the electrode after being electrified, and current deviation caused by electrode process and installation of the disinfectant preparation device under different temperature working conditions of solution is reduced, so that the precision of the effective chlorine concentration in the prepared disinfectant is improved, the prepared disinfectant can achieve the expected disinfection effect, and the use reliability of the disinfectant manufacturing machine is improved.

In one embodiment, there is provided a disinfectant liquid manufacturing machine including an electrode and a disinfectant liquid manufacturing machine control device as described above.

The disinfectant liquid manufacturing machine comprises a power supply control circuit 200, a processor 100 and a constant current circuit 300, wherein the power supply control circuit 200 is used for connecting a power supply, the processor 100 is connected with the power supply control circuit 200, the power supply control circuit 200 is connected with the constant current circuit 300, and the constant current circuit 300 is connected with electrodes of the disinfectant liquid manufacturing machine and outputs constant current to the electrodes. The processor 100 controls the power supply control circuit 200 to transmit the electric energy accessed by the power supply control circuit 200 to the constant current circuit 300, the constant current circuit 300 outputs constant current to the electrode after being electrified, and current deviation caused by electrode process and installation of the disinfectant preparation device under different temperature working conditions of solution is reduced, so that the precision of the effective chlorine concentration in the prepared disinfectant is improved, the prepared disinfectant can achieve the expected disinfection effect, and the use reliability of the disinfectant manufacturing machine is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.