1. The utility model provides an air inlet structure, its characterized in that, includes intake pipe (1), first cylinder (5) and second cylinder (6), first cylinder (5) through first inlet channel (2) with intake pipe (1) is linked together, second cylinder (6) through second inlet channel (3) with intake pipe (1) are linked together, the axis of second inlet channel (3) with the axis parallel arrangement of second cylinder (6), be provided with admission valve (4) on second inlet channel (3), work as when second cylinder (6) are in the uninstallation state, admission valve (4) are closed second inlet channel (3).

2. An air intake structure according to claim 1, wherein the intake valve (4) is capable of opening unidirectionally in a flow direction of fluid in the second intake passage (3).

3. An air intake structure according to claim 1, wherein an inlet of the second air intake passage (3) communicates to the first air intake passage (2), and the second air intake passage (3) communicates with the air intake pipe (1) through the first air intake passage (2).

4. An air intake structure according to claim 3, wherein an inlet of the second air intake passage (3) is provided on a side wall of the first air intake passage (2).

5. An air intake structure according to claim 1, wherein the first air intake passage (2) extends in a radial direction of the first cylinder (5).

6. An air intake structure according to claim 1, wherein the first air intake passage (2) is provided perpendicularly to the second air intake passage (3).

7. The air intake structure according to claim 1, characterized in that the air intake structure further includes a partition plate (7), the partition plate (7) being disposed between the first cylinder (5) and the second cylinder (6), the second air intake passage (3) penetrating the partition plate (7) in an axial direction of the partition plate (7).

8. An air intake structure according to any one of claims 1 to 7, wherein the intake valve (4) includes a valve sheet provided at an inlet of the second intake passage (3).

9. An air inlet arrangement according to claim 8, characterized in that the air inlet valve (4) further comprises a fixing element, the valve plate comprises a first section and a second section, the first section is fixedly arranged on the partition (7) by means of the fixing element when the air inlet arrangement comprises the partition (7), and the second section covers the opening of the air inlet channel when the second cylinder (6) is in the unloaded state.

10. A compressor, characterized by comprising the air intake structure as recited in any one of claims 1 to 9.

11. The compressor according to claim 10, wherein the cross-sectional area of the inlet of the second inlet channel (3) is S, the compressor is arranged as V, V/S ≦ 0.09.

12. An air conditioner characterized by comprising an air intake structure as claimed in any one of claims 1 to 9 or a compressor as claimed in any one of claims 10 to 11.

Background

The variable-capacity compressor adopting the pin spring mechanism is widely applied to the multi-split air conditioning system, the multi-split air conditioning system is wide in operation cold quantity range and operates under a light load working condition in most of time, the performance of the compressor and the system can be greatly improved through variable capacity, and the market reaction is very good. With the increasing of the national energy efficiency requirement, the low-load energy efficiency ratio is larger and larger, and how to improve the energy efficiency of the variable-capacity compressor during low-load single-cylinder operation again becomes a key difficulty in the research of the variable-capacity compressor.

In present double-cylinder varactor compressor, it is the same with current conventional volume production compressor structure to go up the cylinder, and the gleitbretter afterbody is opened in the casing, and the gleitbretter afterbody sets up the spring. Varactor jar gleitbretter afterbody is for sealing the chamber, and the gleitbretter afterbody does not install the spring, and compressor housing sets up the varactor part, and the varactor part is used for controlling the pressure in varactor jar gleitbretter afterbody sealed cavity and is high pressure or the low pressure of breathing in for exhausting, and the lower flange is provided with the pin spring structure that is used for the varactor switching, and pin bottom confined space is through inside route all the time with varactor jar suction channel intercommunication, and the pin bottom is the low pressure of breathing in all the time, and pin top head pressure accessible varactor part and outside pipeline switch.

When the double-cylinder operation, let in exhaust high pressure refrigerant in the varactor part, varactor jar gleitbretter lower part round pin fin portion is the high pressure, and the pin bottom is for breathing in the low pressure, and gaseous power is far more than the spring force, and the pin is locked and is died in the pin hole, and varactor jar gleitbretter afterbody is the high pressure, varactor jar gleitbretter free run, and the compressor is the double-cylinder operation.

When the single cylinder operates, the internal suction low-pressure refrigerant is introduced into the variable-capacity component, the pin head part is low pressure, the lower part of the pin is also low pressure for suction, the gas force is balanced on the upper part and the lower part of the pin, the pin is clamped into a gap on the lower part of a sliding sheet of the variable-capacity cylinder under the action of spring force, the sliding sheet of the variable-capacity cylinder is locked, the variable-capacity cylinder of the compressor is unloaded and idled, and the compressor is in a single-cylinder operation mode.

The above-mentioned switching process for current varactor compressor single cylinder mode of operation and double-cylinder mode of operation, double-cylinder varactor compressor switches to the single cylinder mode of operation after from double-cylinder mode of operation, be the low pressure in the varactor jar, be in the uninstallation state, varactor jar outside is exhaust high pressure, but technical personnel in the field never consider the high-pressure refrigerant from the casing in pass varactor jar roller and flange terminal surface's clearance after, leak in a large number to the varactor jar, rethread varactor jar induction port flows to upper cylinder induction port, lead to the compressor because of the internal leakage and carry out repeated compression, and then lead to the unable biggest problem of exerting of low frequency energy efficiency, the efficiency when having influenced compressor low-load single cylinder operation.

Disclosure of Invention

Therefore, the technical problem to be solved by the application is to provide an air inlet structure, a compressor and an air conditioner, which can avoid the problem of repeated compression caused by internal leakage of the compressor and improve the energy efficiency of the compressor during low-load single-cylinder operation.

In order to solve the problem, the application provides an air inlet structure, including intake pipe, first cylinder and second cylinder, first cylinder through first inlet channel with the intake pipe is linked together, the second cylinder through the second inlet channel with the intake pipe is linked together, the axis of second inlet channel with the axis parallel arrangement of second cylinder, be provided with the admission valve on the second inlet channel, work as when the second cylinder is in the uninstallation state, the admission valve is closed the second inlet channel.

Alternatively, the intake valve may be opened in a one-way direction in a flow direction of the fluid in the second intake passage.

Optionally, an inlet of the second air intake passage is communicated to the first air intake passage, and the second air intake passage is communicated with the air intake pipe through the first air intake passage.

Alternatively, the inlet port of the second intake passage is provided on the side wall of the first intake passage.

Optionally, the first intake passage extends in a radial direction of the first cylinder.

Optionally, the first air intake passage is perpendicular to the second air intake passage.

Optionally, the air intake structure further includes a partition plate, the partition plate is disposed between the first cylinder and the second cylinder, and the second air intake passage penetrates through the partition plate in the axial direction of the partition plate.

Optionally, the intake valve includes a valve plate, and the valve plate is disposed at an inlet of the second intake passage.

Optionally, the air inlet valve further comprises a fixing piece, the valve plate comprises a first section and a second section, when the air inlet structure comprises a partition plate, the first section is fixedly arranged on the partition plate through the fixing piece, and when the second cylinder is in an unloading state, the second section covers the opening of the air inlet channel.

In another aspect of the present application, there is provided a compressor including the air intake structure as described above.

Optionally, the cross-sectional area of the air inlet of the second air inlet channel is S, the arrangement of the compressors is V, and V/S is less than or equal to 0.09.

In another aspect of the present application, an air conditioner is provided, which includes the air intake structure or the compressor.

Advantageous effects

The air inlet structure, the compressor and the air conditioner provided by the embodiment of the invention can avoid the problem of repeated compression caused by internal leakage of the compressor, and improve the energy efficiency of the compressor during low-load single-cylinder operation.

Drawings

Fig. 1 is a sectional view of a compressor according to an embodiment of the present application;

FIG. 2 is a first cross-sectional view at a first cylinder and a second cylinder of an embodiment of the present application;

FIG. 3 is a second cross-sectional view at the first and second cylinders of an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a compressor according to an embodiment of the present application;

FIG. 5 is a graph comparing the performance of the compressor of the embodiment of the present application with the performance of the single cylinder operation of the prior variable displacement compressor;

FIG. 6 is a graph of compressor performance versus V/S for different frequencies in an embodiment of the present application.

The reference numerals are represented as:

1. an air inlet pipe; 2. a first air intake passage; 3. a second intake passage; 4. an intake valve; 5. a first cylinder; 6. a second cylinder; 7. a partition plate; 8. a high-pressure solenoid valve; 9. a low-pressure solenoid valve; 10. a pin.

Detailed Description

Referring to fig. 1 to 4 in combination, according to an embodiment of the present application, an air intake structure includes an air intake pipe 1, a first cylinder 5 and a second cylinder 6, the first cylinder 5 is communicated with the air intake pipe 1 through a first air intake passage 2, the second cylinder 6 is communicated with the air intake pipe 1 through a second air intake passage 3, a central axis of the second air intake passage 3 is parallel to a central axis of the second cylinder 6, an air intake valve 4 is disposed on the second air intake passage 3, when the second cylinder 6 is in an unloaded state, the air intake valve 4 closes the second air intake passage 3, the central axis of the second air intake passage 3 is parallel to the central axis of the second cylinder 6, and the air intake valve 4 is disposed on the second air intake passage 3, so as to ensure smooth air intake of the second cylinder 6, and at the same time, avoid the problem of repeated compression caused by internal leakage of the compressor, and improve the energy efficiency of the compressor during low load single cylinder, when the air inlet structure is the same as the compressor, as shown in fig. 5, compared with the single-cylinder operation performance of the existing variable capacity compressor, the energy efficiency of the compressor is improved by 10-20% when the compressor operates in a single-cylinder mode.

Further, compared with the prior art, in the recent structure in this embodiment, the air inlet valve 4 is arranged to close and block the leakage of high and low pressure, so as to avoid the problem that the air suction temperature of the upper cylinder rises due to the high pressure leaking back to the liquid separator, and also avoid the problem that the air suction amount is reduced.

Further, as shown in fig. 1 to 3, the central axis of the second air intake channel 3 and the central axis of the second air cylinder 6 are both vertically disposed, and compared with the radial air suction of the existing air cylinder, the second air intake channel 3 in this embodiment is not subject to a cylinder height limit value, which is beneficial to the miniaturization of the device.

Further, when the second cylinder 6 is in an unloaded state, the air inlet valve 4 closes the second air inlet channel 3, that is, when the second cylinder 6 idles and does not compress the refrigerant, the air inlet valve 4 is closed, and then the second air inlet channel 3 is closed, so that the refrigerant is prevented from being discharged from the second cylinder 6 to the first cylinder 5, and the problem of repeated compression of the compressor due to internal leakage is avoided.

Further, the air inlet pipe 1 is a single pipe, and the first air inlet channel 2 and the second air inlet channel 3 are simultaneously communicated with the air inlet pipe 1.

Further, the second cylinder 6 is a variable displacement cylinder.

The air inlet valve 4 can be opened in a one-way mode along the flowing direction of fluid in the second air inlet channel 3, normal air inlet of the second air cylinder 6 is guaranteed, meanwhile, the refrigerant is further prevented from being discharged to the first air cylinder 5 from the second air cylinder 6, and therefore the problem of repeated compression caused by internal leakage of the compressor is avoided.

Further, when the second cylinder 6 is loaded with work compression refrigerant, the air inlet valve 4 is opened, the refrigerant can enter the second cylinder 6 through the second air inlet channel 3, and when the second cylinder 6 is in an unloading state, the air inlet valve 4 closes the second air inlet channel 3, so that the refrigerant is prevented from being discharged from the second cylinder 6 to the second air inlet channel 3 and then entering the first cylinder 5.

The inlet port of the second air inlet channel 3 is communicated to the first air inlet channel 2, the second air inlet channel 3 is communicated with the air inlet pipe 1 through the first air inlet channel 2, the space occupied by the air inlet channel can be reduced, the compressor miniaturization is facilitated, meanwhile, the first air cylinder 5 can linearly admit air, and the smoothness of air inflow of the first air cylinder 5 can be guaranteed.

Furthermore, the first air inlet channel 2 is communicated with the air inlet pipe 1, an inlet of the second air inlet channel 3 is communicated to the first air inlet channel 2, and the refrigerant enters the first air inlet channel 2 from the air inlet pipe 1 and enters the second air inlet channel 3 from the first air inlet channel 2 through the inlet of the second air inlet channel 3.

The inlet port of the second air intake passage 3 is provided on the side wall of the first air intake passage 2, ensuring the smoothness of air intake of the second passage.

First inlet channel 2 can reduce the space that inlet channel occupy along the radial extension of first cylinder 5, is favorable to the compressor miniaturization, and first cylinder 5 can be followed the straight line and is admitted air simultaneously, can guarantee the smooth and easy nature that first cylinder 5 admitted air.

First air intake duct 2 sets up with second air intake duct 3 is perpendicular, can guarantee first air intake duct 2 and second air intake duct 3 smoothly to admit air simultaneously under the condition of less occupation space.

Further, the first air intake passage 2 is horizontally disposed, and the second air intake passage 3 is vertically disposed.

The air inlet structure further comprises a partition plate 7, the partition plate 7 is arranged between the first air cylinder 5 and the second air cylinder 6, and the second air inlet channel 3 penetrates through the partition plate 7 along the axial direction of the partition plate 7, so that the second air inlet channel 3 is ensured to be communicated.

Furthermore, through the arrangement of the partition plate 7, the separation of the working cavity in the first cylinder 5 and the working cavity in the second cylinder 6 is realized, so that the second air inlet channel 3 penetrates through the partition plate 7 along the axial direction of the partition plate 7, and the penetration of the second air inlet channel 3 is ensured.

The admission valve 4 includes the valve block, and the valve block setting makes control structure simpler at the entrance department of second inlet channel 3 through setting up the valve block, realizes the volume production easily.

The admission valve 4 still includes the mounting, and the valve block includes first section and second section, and when air inlet structure includes baffle 7, first section passes through the fixed setting of mounting on baffle 7, and when second cylinder 6 was in the uninstallation state, the second section lid was established on last inlet channel's opening, with the valve block setting on baffle 7, when providing mounted position for the valve block, also can guarantee the stable connection of valve block.

Further, the valve plate is arranged on one side of the partition plate 7 far away from the first air cylinder 5, namely the valve plate is arranged at the bottom of the partition plate 7.

Further, the intake valve 4 is a reed valve, and since the intake speed is low, a valve plate baffle is not provided.

In another aspect of the present embodiment, a compressor is provided, which includes the air intake structure as described above.

The cross section area of the air inlet of the second air inlet channel 3 is S, the arrangement of the compressor is V, and V/S is less than or equal to 0.09.

Because the second cylinder 6 is provided with the air inlet valve 4, compared with the existing rotor compressor, the second cylinder 6 of the compressor in the embodiment has certain air suction resistance, the sectional area of the air inlet of the second air inlet channel 3 is S, in order to effectively reduce air suction loss, the air suction port must be designed to be large enough, the requirement that the compressor displacement and the air suction port area S meet that V/S is less than or equal to 0.09 can be met, and the energy efficiency of the compressor during double-cylinder operation can be ensured. As shown in fig. 6, it is found through experimental tests that the performance of the compressor tends to increase with the decrease of V/S at different frequencies, and when the suction port area increases to a certain extent, the suction loss does not change much, and the performance of the compressor changes smoothly.

When the compressor in the embodiment operates in a double-cylinder mode, the high-pressure electromagnetic valve 8 is opened, the low-pressure electromagnetic valve 9 is closed, the head of the pin 10 is high-pressure, the first cylinder 5 and the second cylinder 6 of the compressor normally suck air, the pin 10 is fixed in the pin 10 hole under the action of gas force, the slip sheet of the second cylinder 6 normally operates, and the compressor operates in a double-cylinder mode. The air suction low-pressure refrigerant enters the liquid distributor through the inlet of the liquid distributor, enters the air suction port of the first air cylinder 5 through the inserted straight pipe of the liquid distributor, and the first air cylinder 5 sucks air normally. And a second air inlet channel 3 is formed, air suction negative pressure is generated when the second air cylinder 6 sucks air, the air inlet valve 4 is opened, and the second air cylinder 6 sucks air normally.

When the compressor in the embodiment operates in a single cylinder, the high-pressure electromagnetic valve 8 is closed, the low-pressure electromagnetic valve 9 is opened, the first cylinder 5 of the compressor normally inhales air, at the moment, an air-breathing low-pressure refrigerant is introduced into the variable-volume component, the head of the pin 10 is low-pressure, the lower end of the pin 10 is communicated with the second air inlet channel 3 through the lower flange and the upper linkage through hole of the lower cover plate, the lower end of the pin 10 is low-pressure, the pressures of the upper end and the lower end of the pin 10 are balanced, the spring force is upward, the pin 10 extends out of the pin 10 hole under the spring force to lock the slip sheet of the second cylinder 6, the second cylinder 6 idles, the low-pressure refrigerant is inhaled inside the second cylinder 6, and the compressor operates in a single cylinder. High-pressure refrigerant leaks to the inside of the second cylinder 6 through the gap between the roller and the flange and the end face of the partition plate 7 in the compressor shell, and the air inlet valve 4 is closed by the high-pressure leaked refrigerant under the action of pressure difference due to the arrangement of the air inlet valve 4, so that a high-pressure and low-pressure leakage channel is blocked, and the air suction and compression processes of the first cylinder 5 cannot be influenced by the leaked high-pressure refrigerant.

In another aspect of the present embodiment, an air conditioner is provided, which includes the air intake structure or the compressor.

When the air inlet structure or the compressor is used for the multi-split air-conditioning system, the single-cylinder low-frequency energy efficiency improvement can greatly improve the comprehensive energy efficiency of the system for the multi-split air-conditioning system.

The air inlet structure, the compressor and the air conditioner provided by the embodiment of the invention can avoid the problem of repeated compression caused by internal leakage of the compressor, and improve the energy efficiency of the compressor during low-load single-cylinder operation.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.