1. An automatic water supply device is characterized by comprising a kettle, a bracket for placing the kettle, a detection device and a water supply mechanism for supplying water to the kettle, wherein the kettle comprises a water injection port;

the detection device comprises an induction element and a first sensor arranged on the bracket, the induction element is arranged in the kettle and ascends and descends along with the liquid level, and the first sensor outputs a first detection signal when detecting that the induction element is positioned at a first height;

the water supply mechanism comprises a water supply pipe and a water valve arranged on the water supply pipe, and the outlet of the water supply pipe corresponds to the water filling port of the kettle;

the automatic water supply device also comprises a controller, and the first detection signal received by the controller controls the water valve to be opened;

the detection device further comprises a detection piece, the detection piece can output a second detection signal representing the liquid level in the kettle, and the controller controls the water valve to be closed when receiving the second detection signal.

2. The automatic water supply device according to claim 1, wherein the detecting member is a second sensor disposed on the bracket, the second sensor outputs the second detection signal when detecting that the sensing element is located at a second height, and the second height is greater than the first height.

3. The automatic water supply device according to claim 2, wherein the first sensor and the second sensor are both hall switches, and the sensing element is a magnet.

4. The automatic water supply device according to claim 1, wherein a float box is provided in the water bottle, the induction unit is fixedly arranged in the float box, and the float box is lifted and lowered along with the change of the liquid level.

5. The automatic water supply device according to claim 4, wherein the side wall of the kettle is provided with a rail extending in a height direction, the float box is located in the rail, and the rail is provided with water holes for flowing water.

6. The automatic water supply device according to claim 1, wherein the water bottle comprises a bottle cap, a bottle body and a water storage space defined by the bottle cap and the bottle body, and the water filling port is arranged on the bottle cap; the water kettle also comprises a water injection cup extending from the water injection port to the bottom of the water kettle, and a plurality of water outlets communicated with the water storage space are arranged on the peripheral wall of the water injection cup.

7. The automatic water supply device according to claim 6, wherein said pouring cup includes a bottom wall which is upwardly convex, and said water outlet extends from top to bottom on said peripheral wall to a position where it connects to the bottom wall.

8. The automatic water supply device as claimed in claim 1, wherein the water bottle comprises a cover, a body and a water storage space defined by the cover and the body, the body is provided with a water outlet nozzle, a water baffle is arranged in the water storage space adjacent to the water outlet nozzle, and a water passage communicated with the water outlet nozzle is formed between the water baffle and the inner wall of the water bottle.

9. The automatic water supply apparatus according to claim 8, wherein the water guard plate is arc-shaped.

10. The automatic water supply apparatus of claim 8, wherein the water guard extends from the lid toward the bottom of the water bottle, and the water passage is formed at both sides and the bottom of the water guard.

11. A refrigerator comprising a cabinet and a door for opening and closing the cabinet, wherein the water supply device according to any one of claims 1 to 10 is provided inside the door.

12. An automatic water supply method is used for supplying water to a kettle arranged on a refrigerator door, and is characterized by comprising the following steps:

detecting the real-time height of an induction element arranged in the kettle;

when the induction element is positioned at a first height, outputting a first detection signal;

when the controller receives the first detection signal, the water valve is opened;

and when the controller receives the second detection signal, closing the water valve.

13. The automatic water supply method according to claim 12, further comprising:

and when the induction element is positioned at a second height, outputting the second detection signal, wherein the second height is greater than the first height.

14. The automatic water supply method according to claim 12, further comprising:

and when the controller receives an overflow signal or a refrigerator door opening signal, closing the water valve.

15. The automatic water supply method as claimed in claim 12, wherein after the step of the controller receiving the first detection signal to open the water valve, the method further comprises:

the timer records the opening time of the water valve;

when the opening time exceeds a first preset time length, the timer outputs a first overtime signal;

and when the controller receives a first overtime signal, closing the water valve.

Background

Many refrigerators currently provide chilled drinking water. Generally, there are two water supply methods, one is to arrange a distributor on the surface of the refrigerator, and a user can use a cup to receive water at the distributor; another water supply mode is that a water kettle is arranged in the refrigerator, the water kettle is filled with water and then is placed in the refrigerating chamber, and cold water can be drunk after the water kettle is taken out after a period of time. In the second scheme, in order to bring convenience to users to take sufficient cold water at any time, some automatic water injection devices are available on the market, one group of Hall switches and magnets are used for detecting whether a kettle is placed on a support or not, the other group of Hall switches and a floater with the magnets arranged inside are used for detecting whether the liquid level in the kettle is lower or not, and automatic water injection is carried out when the kettle is placed on the support and the liquid level is lower.

However, the float can be detached from the water bottle, and if the user forgets to put the float into the water bottle when cleaning the water bottle, the hall switch cannot detect the magnet and automatically fills water until the water overflows the water bottle. Therefore, the detection method has potential water overflow hazard and brings much trouble to users.

Disclosure of Invention

The invention aims to provide an automatic water supply device, a refrigerator with the same and an automatic water supply method.

In order to achieve the above object, an embodiment of the present invention provides an automatic water supply device, including a water bottle, a holder for holding the water bottle, a detection device, and a water supply mechanism for supplying water to the water bottle, wherein the water bottle includes a water injection port; the detection device comprises an induction element and a first sensor arranged on the bracket, the induction element is arranged in the kettle and ascends and descends along with the liquid level, and the first sensor outputs a first detection signal when detecting that the induction element is positioned at a first height; the water supply mechanism comprises a water supply pipe and a water valve arranged on the water supply pipe, and the outlet of the water supply pipe corresponds to the water filling port of the kettle; the automatic water supply device also comprises a controller, and the first detection signal received by the controller controls the water valve to be opened; the detection device further comprises a detection piece, the detection piece can output a second detection signal representing the liquid level in the kettle, and the controller controls the water valve to be closed when receiving the second detection signal.

As a further improvement of the present invention, the detecting element is a second sensor disposed on the bracket, the second sensor outputs the second detection signal when detecting that the sensing element is located at the second height, and the second height is greater than the first height.

As a further improvement of the present invention, the first sensor and the second sensor are both hall switches, and the sensing element is a magnet.

As a further improvement of the invention, a float box is arranged in the kettle, the induction element is fixedly arranged in the float box, and the float box is lifted along with the change of the liquid level.

As a further improvement of the invention, the side wall of the kettle is provided with a track extending along the height direction, the float box is positioned in the track, and the track is provided with water holes for water to flow.

As a further improvement of the invention, the kettle comprises a kettle cover, a kettle body and a water storage space limited by the kettle cover and the kettle body, wherein the water injection port is arranged on the kettle cover; the water kettle also comprises a water injection cup extending from the water injection port to the bottom of the water kettle, and a plurality of water outlets communicated with the water storage space are arranged on the peripheral wall of the water injection cup.

As a further improvement of the invention, the water injection cup comprises a bottom wall which is convex upwards, and the water outlet extends to a position connected with the bottom wall from top to bottom on the peripheral wall.

As a further improvement of the invention, the kettle comprises a kettle cover, a kettle body and a water storage space limited by the kettle cover and the kettle body, wherein a water outlet nozzle is arranged on the kettle body, a water baffle is arranged at a position close to the water outlet nozzle in the water storage space, and a water passing channel communicated with the water outlet nozzle is formed between the water baffle and the inner wall of the kettle.

As a further improvement of the invention, the water baffle is arc-shaped.

As a further improvement of the invention, the water baffle extends from the kettle cover to the bottom of the kettle, and the water passing channel is formed on two sides and the bottom of the water baffle.

The invention also discloses a refrigerator, which comprises a refrigerator body and a door body for opening and closing the refrigerator body, wherein the inner side of the door body is provided with the water supply device.

The invention also discloses an automatic water supply method for supplying water to the kettle arranged on the refrigerator door, which comprises the following steps: detecting the real-time height of an induction element arranged in the kettle; when the induction element is positioned at a first height, outputting a first detection signal; when the controller receives the first detection signal, the water valve is opened; and when the controller receives the second detection signal, closing the water valve.

As a further improvement of the present invention, after the "the controller opens the water valve when receiving the first detection signal", the method further includes: and when the induction element is positioned at a second height, outputting the second detection signal, wherein the second height is greater than the first height.

As a further improvement of the present invention, the method further comprises: and when the controller receives an overflow signal or a refrigerator door opening signal, closing the water valve.

As a further improvement of the present invention, after the step of "receiving the first detection signal, opening the water valve", the method further comprises: the timer records the opening time of the water valve; when the opening time exceeds a preset time length, the timer outputs an overtime signal; and when the controller receives the overtime signal, the water valve is closed.

As a further improvement of the present invention, after the step of "receiving the first detection signal, opening the water valve", the method further comprises: when the induction element is positioned at a third height, outputting a third detection signal, wherein the third height is greater than the first height; when the controller receives the third detection signal, the timer is started; the timer records the opening time of the water valve; when the opening time exceeds a second preset time length, the timer outputs a second overtime signal; and when the controller receives a first overtime signal, closing the water valve.

Compared with the prior art, the automatic water supply device disclosed by the invention has the advantages that the controller can control the water valve to be opened only when the first sensor detects that the sensing element is positioned at the lower first height, and if a user forgets to put the sensing element into the kettle after cleaning the kettle, the controller can always control the water valve to be closed, so that the kettle cannot be automatically filled with water. The problem of the sensor can't detect the response unit, last water injection and lead to the kettle overflow is avoided.

Drawings

FIG. 1 is a schematic structural diagram of a refrigerator door according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view of an automatic water supply apparatus according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is a schematic sectional view of an automatic water supply apparatus according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of portion B of FIG. 4;

FIG. 6 is a schematic view of a water bottle according to an embodiment of the present invention;

FIG. 7 is a schematic sectional view of a water jug according to an embodiment of the present invention;

FIG. 8 is a schematic flow chart illustrating an automatic water supply method according to an embodiment of the present invention;

FIG. 9 is a schematic flow chart illustrating an automatic water supply method according to an embodiment of the present invention;

fig. 10 is a schematic flow chart illustrating an automatic water supply method according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

It will be understood that terms used herein such as "upper," "above," "lower," "below," and the like, refer to relative positions in space and are used for convenience in description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

As shown in fig. 1, an embodiment of the present invention discloses a refrigerator, which includes a refrigerator body and a door body 1 for opening and closing the refrigerator body, wherein an automatic water supply device 2 is disposed inside the door body 1. As shown in fig. 2 to 7, the automatic water supply apparatus 2 includes a water bottle 100, a holder 200 for holding the water bottle 100, a detecting device 300, and a water supply mechanism 400 for supplying water to the water bottle 100. The cabinet may define a cold storage chamber, and when the door 1 closes the cabinet, cold air in the cold storage chamber may cool water in the kettle 100.

Of course, the place of use of the automatic water supply device is not limited to the refrigerator, and may be various places such as other refrigeration home appliances, and a cafe. In embodiments of the present invention, water is a generic term for liquid beverages, including, but not limited to, liquid beverages such as purified water, fruit juice, milk, or coffee.

As shown in fig. 3-7, the water jug 100 includes a fill port 110. The detection device 300 comprises an induction element 321 and a first sensor 322 arranged on the bracket 200, wherein the induction element 321 is arranged in the kettle 100 and is lifted along with the liquid level, and the first sensor 322 outputs a first detection signal when detecting that the induction element 321 is positioned at a first height. The water supply mechanism 400 includes a water supply pipe 410 and a water valve installed on the water supply pipe 410, and an outlet of the water supply pipe 410 corresponds to the water filling port 110 of the water bottle 100. The automatic water supply device further comprises a controller, and the first detection signal received by the controller controls the water valve to be opened. The detection device further comprises a detection piece, the detection piece can output a second detection signal representing the liquid level in the kettle, and the controller controls the water valve to be closed when receiving the second detection signal.

According to the automatic water supply device disclosed by the invention, the controller can control the water valve to be opened only when the first sensor 322 detects that the induction element 321 is positioned at the lower first height, and if a user forgets to put the induction element into the kettle after cleaning the kettle, the controller can always control the water valve to be closed, so that the kettle cannot be automatically filled with water. The problem of the sensor can't detect the response unit, last water injection and lead to the kettle overflow is avoided.

Specifically, in the embodiment of the present invention, the detecting element is a second sensor 323 disposed on the bracket 200, the second sensor 323 outputs the second detection signal when detecting that the sensing element 321 is located at the second height, and the second height is greater than the first height. The second sensor 210 is used to determine the timing for ending the water filling after the water filling is started.

Specifically, the first height is closer to the bottom of the kettle 100 than the second height, and is also the lowest point of the sensing element 321 in the kettle 100. It can be considered that when the sensing element 321 is located at the first height, there is little or no water in the water bottle 100, and at this time, the water valve needs to be opened to inject water; the second height is a height closer to the top of the kettle 100, and it can be considered that when the sensing element 321 is at the second height, the water in the kettle 100 is more or in a full water state, and at this time, the water valve needs to be closed to stop the water injection. When the liquid level in the kettle 100 is lower than the first height, the liquid level of the kettle 100 is lower than or equal to the first height, the first sensor 322 detects the sensor and outputs a first detection signal, and the controller controls the water valve to open to fill the kettle 100. During the water filling process, the sensing element 321 moves upward along with the liquid level, and when the liquid level reaches the second height, the liquid level of the kettle 100 also reaches the second height, and at this time, the second sensor 323 detects the sensing element 321 to output a second detection signal, and the controller controls the water valve to close. Thereby completing the process of automatic water injection.

Specifically, the water supply pipe 410 may be externally connected to a user water source and extend into the door body 1 along the refrigerator body. When the water valve is opened, the external water source can fill water into the kettle 100 through the water supply pipe 410. Specifically, in the embodiment of the present invention, the water supply pipe extends from the press cabin at the lower part of the box body, along the box body and enters the inner side of the door body, and the water valve may be arranged on the water supply pipe in the press cabin. Of course, in other embodiments, the water valve may be provided in other parts of the water supply pipe.

As shown in fig. 3, in the embodiment of the present invention, a float box 131 is disposed in the kettle, the sensing element 321 is fixedly disposed in the float box 131, and the float box 131 is lifted and lowered with the change of the liquid level. The float box 131 seals the sensing element 321 inside to ensure up-and-down floating.

Specifically, the side wall of the water bottle 100 is provided with a rail 132 extending in the height direction, the float box 131 is located in the rail 132, and the rail 132 is provided with a water hole 1323 for flowing water. Specifically, the rail 132 is disposed on the inner sidewall of the kettle 100 along the height direction of the kettle 100, the rail includes a housing 1321 protruding toward the inside of the kettle and an inner passage 1322 surrounded by the housing 1321, the float case 131 is disposed in the inner passage 1322, and a water hole 1323 communicating with the inner passage 1322 is formed along the length direction of the sidewall of the housing 1321, so that the liquid in the kettle 100 can flow into the inner passage 1322. The dimensions of the internal channel 1322 are adapted to the dimensions of the float cassette 131 so that the float cassette 131 can only move in the vertical direction with the liquid level. In addition, water holes are also formed in the bottom wall of the housing 1321 to facilitate the entry of liquid into the internal passage 1322. The top of the housing 1321 is provided with an opening 1324 and a sealing member 1325 for sealing the opening 1324. When the user washes the water bottle, the sealing member 1325 can be taken out, and the float case 131 can also be taken out for washing.

In another embodiment, an inner box fixedly connected with the kettle cover and extending downwards from the kettle cover can be arranged, and the float box is arranged inside the inner box and enables liquid in the kettle to flow into the inner box, so that the float can float up and down along with the liquid level.

In the embodiment of the present invention, as shown in fig. 4 to 5, the first sensor 322 and the second sensor 323 are both hall switches, and the sensing element 321 is a magnet. Two hall switches are arranged on the bracket 200 along the height direction, and the approach of the magnet can be respectively detected. Specifically, the hall switch is an active electromagnetic conversion device manufactured by utilizing an integrated packaging and assembling process on the basis of a hall effect principle, the hall switch can sense the magnitude of magnetic flux, when the magnetic flux reaches a preset value, a trigger inside the hall switch is turned over, and the output level state of the hall switch is also turned over, so that a magnetic input signal can be converted into an electric signal. And the magnet in the float box can move up and down along with the liquid level, so that the magnetic flux detected by the Hall switch changes along with the liquid level.

The first sensor 322 is disposed on the stand 200 at a position corresponding to a first height, and the second sensor 323 is disposed on the stand 200 at a position corresponding to a second height. After the water bottle 100 is placed on the bracket 200, if the user forgets to put the float box 131 back into the water bottle 100, the first sensor 322 cannot detect the sensing element 321 all the time, the water valve will keep the closed state continuously, and no matter whether there is water in the water bottle 100, the water bottle 100 will not be filled with water automatically. If the water bottle 100 is placed on the stand 200 and the float case 131 is in the water bottle 100, the height of the sensing element 321 is different according to the liquid level. If the liquid level in the kettle 100 is equal to or lower than the first height, the sensing element 321 is located at the first height, the distance between the sensing element 321 and the first sensor 322 is closest, the magnetic flux sensed by the first sensor 322 reaches a preset value, the trigger inside the first sensor 322 is turned over to switch the output level state of the first sensor 322 (the hall switch is turned from the off state to the on state), and the controller receives the first detection signal to open the water valve to start automatic water filling for the kettle 100. In the water filling process, the liquid level rises to drive the float box 131 to move upwards, the induction element 322, namely the magnet, is close to the second sensor 323, when the liquid level in the kettle 100 reaches the second height, the magnetic flux induced by the second sensor 323 also reaches the preset value, the trigger inside the second sensor 323 is turned over to enable the output level state of the second sensor 323 to be switched (the hall switch is switched from the off state to the on state), and the controller receives a second detection signal to close the water valve, so that the water filling is stopped automatically. Therefore, the liquid level in the kettle is judged by respectively detecting the positions of the magnets through the two Hall switches, and the controller can control the opening or closing of the water valve according to different detection signals sent by the different Hall switches so as to automatically fill water into the kettle when needed. In addition, the water valve is set to be opened only when the first detection signal indicating that the sensor is located at the first height is received, so that the sensor 321 is ensured to be located inside the kettle 100 at the moment, and the problem of water overflow is avoided.

Similarly, the detecting means 320 can detect whether the water bottle 100 is placed on the stand 200. When the controller receives the first detection signal, it can be determined that the water bottle 100 is placed on the stand 200 at this time, and the liquid level is low and automatic water filling is required.

In another embodiment, the second sensor may be other sensors such as a photoelectric sensor and a capacitance liquid level sensor, which is not limited in the present invention. The sensors such as the photoelectric sensor or the capacitance liquid level sensor can directly detect the liquid level in the kettle, and when the real-time liquid level reaches the preset liquid level, the sensors can be triggered to output detection signals to the controller, so that the controller closes the water valve.

In another embodiment, the detecting member may be a timer, and the first sensor may be a hall switch. In the water filling process, the induction element gradually moves upwards along with the liquid level, the magnetic flux induced by the first sensor is smaller than a preset value when the magnetic flux is at a certain liquid level, the output level state of the first sensor is converted again (the Hall switch is turned from a connection state to a disconnection state), the controller receives a disconnection signal output by the first sensor to control the timer to start timing, and when the water filling time reaches preset time (15 s, 30s and the like), the water valve can be controlled to be closed. Therefore, the second sensor can be omitted, and the first sensor is only matched with the induction element and the timer to control the opening and closing of the water valve and the process of automatic water injection. Specifically, the preset time can be calculated in advance according to the height of the first sensor, the automatic water injection speed and the volume of the kettle.

As shown in fig. 5 to 6, the water bottle 100 further includes a cover 120, a bottle body 130 and a water storage space defined by the cover 120 and the bottle body 130, and the water inlet 110 is disposed on the cover 120. The water jug 100 further comprises a water filling cup 140 extending from the water filling port 110 to the bottom of the water jug 100, and a plurality of water outlets 141 communicated with the water storage space are arranged on the peripheral wall of the water filling cup 140. The water injection cup 140 is arranged to slow down the flow rate of water flow during water injection, reduce noise during water injection and prevent water flow from splashing everywhere.

Preferably, the water pouring cup 140 includes a bottom wall 142 protruding upward, and the water outlet 141 extends from top to bottom on the peripheral wall to a position connected to the bottom wall 142. Specifically, a plurality of strip-shaped water outlets 141 are spaced apart from each other on the circumferential wall of the water filling cup 140, and the water outlets 141 extend from the circumferential wall of the water filling cup 140 so that water can flow into the water storage space quickly without being collected in the water filling cup 140. The upward protrusion of the bottom wall 142 further prevents water in the water pouring cup 140 from collecting and flowing out of the water outlet 141.

The kettle body 130 is provided with a water outlet 131, a water baffle 150 is arranged in the water storage space and close to the water outlet 131, and a water passing channel 151 communicated with the water outlet 131 is formed between the water baffle 150 and the inner wall of the kettle 100. When the user takes water, the water may be poured out of the spout 131. The water guard plate 150 is provided to prevent water from flowing through the water bottle 100 when a user pours water.

Preferably, the water guard plate 150 is preferably curved. And, the arc top of the water guard 150 protrudes toward the sidewall of the water jug 100 opposite to the water outlet nozzle 131. The arc-shaped water baffle 150 has a good water retaining effect, and the arc top of the arc-shaped water baffle protrudes towards the side wall of the kettle 100 opposite to the water outlet 131, so that the water baffle 150 and the side wall of the kettle 100 form an effective water passing channel, and the water splashing prevention effect is further enhanced.

In the embodiment of the present invention, the water guard plate 150 extends from the lid 120 to the bottom of the kettle 100, and the water passage 151 is formed at both sides and the bottom of the water guard plate 150. The water deflector 150 extending toward the bottom of the kettle 100 may draw water into the water passage from a lower position of the kettle 100, thereby further reducing the flow rate of the poured water.

As shown in fig. 1, a bottle seat 3 is disposed on the door 1, a support 200 is additionally disposed on the bottle seat 3, the support 100 is preassembled with the bottle seat 3 through a connecting member, which may be a hook structure, so as to facilitate the assembly and disassembly of the support 100 and the bottle seat 3. When the user does not need to use the kettle, the kettle 100 and the bracket 200 can be detached, and the original position for placing the bracket can be continuously used as the bottle seat. The outlet of the water supply pipe 410 is fixed to the upper half of the bracket 100 so as to be aligned with the water filling port 110 of the lid 120 of the water jug 100. The water bottle 100 is located at the lower side of the bottle holder 3 and near one side of the door handle. The kettle can be transversely drawn out along the width direction of the door body, so that the occupied space of the refrigerator is small, and the storage space of the rack in the refrigerating chamber is not influenced.

As shown in fig. 8 to 10, in another aspect, the present invention discloses an automatic water supply method for supplying water to a kettle installed in a refrigerator door, the method comprising:

s100, detecting the real-time height of the induction element 321 arranged in the kettle 100.

In the embodiment of the present invention, the sensing element 321 is disposed in the float box 131 and can move up and down along with the liquid level. Specifically, the real-time height of the sensor element is detected by a first sensor 322 disposed on the bracket. The first sensor 322 is a hall switch, and the sensing element 321 is a magnet.

S200, when the sensor 321 is located at the first height, outputting a first detection signal.

When the sensing element 321 is located at the first height and is closest to the first sensor 322, the magnetic flux sensed by the first sensor 322 reaches a preset value to turn over a trigger inside the first sensor 322, so that the first sensor 322 outputs a first detection signal to the controller.

And S300, when the controller receives the first detection signal, the water valve is opened.

When the controller receives the first detection signal, the controller opens the water valve when the liquid level in the kettle 100 is low and water needs to be filled.

S400, when the controller receives the second detection signal, the water valve is closed.

The second detection signal is a signal output from the second sensor 323 provided in the cradle 200. The second sensor 323 may detect the level of the liquid in the kettle 100 and when the level reaches a predetermined level, it indicates that the water in the kettle is sufficient and the filling may be stopped. Therefore, the second sensor 323 outputs a second detection signal, and the controller closes the water valve when receiving the second detection signal.

Further, as shown in fig. 9, after step S300, the method further includes:

s310, when the sensor 321 is located at a second height, the second detection signal is output, where the second height is greater than the first height.

In the embodiment of the present invention, the second sensor 323 is a hall switch, and has a height higher than that of the first sensor 322. Thus, when the sensing element 321 approaches the second sensor 323, the magnetic flux sensed by the second sensor 323 reaches a preset value to flip a trigger inside the second sensor 323, so that the second sensor 323 outputs a second detection signal to the controller.

Further, the method further comprises:

and S500, when the controller receives an overflow signal or a refrigerator door opening signal, closing the water valve.

The automatic water supply device is also provided with an overflow detection device and a refrigerator door opening and closing detection device. The overflow detection device is used for detecting whether water in the kettle overflows or not. The refrigerator door opening and closing device is used for detecting whether a refrigerator door is in an open state or a closed state. Specifically, if the controller receives the overflow signal, it indicates that the water in the kettle is full, and therefore the controller is required to close the water valve. If the controller receives a refrigerator door opening signal, a user may take the water bottle, and at this time, the water cannot be filled continuously, so that the controller also needs to close the water valve.

Further, as shown in fig. 10, after the step of S300, the method further includes:

and S320, recording the opening time of the water valve by a timer.

After the controller opens the water valve, the timer will start to record the opening time of the water valve.

S321, when the open time exceeds a preset time, the timer outputs an timeout signal.

Generally, the flow rate of water injection is constant. The water injection amount can be calculated by multiplying the flow rate by the water injection time. In order to prevent the detection device and the overflow detection device from losing efficacy, the automatic water supply device is also provided with water injection overtime protection. When the water injection time exceeds the preset time, overflow may occur, and the timer outputs an overtime signal to the controller. Specifically, the preset duration can be designed according to parameters such as the flow rate of water injection, the volume of the kettle and the like. In the embodiment of the present invention, the preset time period may be set to 150 seconds.

And S322, when the controller receives the overtime signal, closing the water valve.

When the controller receives the overtime signal, the controller closes the water valve to prevent excessive water overflow when the controller indicates that the water overflow phenomenon is possible.

According to the automatic water supply device disclosed by the invention, the controller can control the water valve to be opened only when the first sensor detects that the sensing element is positioned at the lower first height, and if a user forgets to put the sensing element into the kettle after cleaning the kettle, the controller can always control the water valve to be closed, so that the kettle cannot be automatically filled with water. The problem of the sensor can't detect the response unit, last water injection and lead to the kettle overflow is avoided. Utilize two hall switches and a magnet to detect the liquid level in the kettle, simple structure, detection accuracy is high. Through set up track and float box at the kettle inner wall, can make magnet reciprocate along with the liquid level, through being close to different hall switch and exporting different detected signal, the controller can come the switching of control water valve according to the detected signal of receiving difference. The water injection cup arranged in the kettle can slow down the flow velocity of water flow during water injection, reduce the noise during water injection and prevent the water flow from splashing everywhere. The upward bulge of the bottom wall of the water injection cup can further prevent water in the water injection cup from gathering and flowing out of the water outlet. The water baffle is arranged, so that water can be prevented from flowing through the water tank suddenly and splashing out of the water tank when a user pours water.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.