Unit type air conditioner

Abstract

The unit type air conditioner comprises a shell, a heat exchange assembly and a flow guide assembly, the shell is provided with an installation cavity and an air outlet, and the heat exchange assembly and the flow guide assembly are both installed in the installation cavity; the heat exchange assembly comprises a condenser, an evaporator and a compressor, one end of the compressor communicates with one end of the condenser, and the other end of the condenser communicates with one end of the evaporator; the other end of the evaporator is communicated with the other end of the compressor; the flow guide assembly comprises a fan and a flow guide cover, the flow guide cover is provided with a flow guide cavity, and the fan is communicated with the flow guide cavity and can guide airflow into the flow guide cavity; the other end of the flow guide cavity is communicated with the air outlet; the inner wall of the flow guide cavity is provided with a guide arc face which is used for guiding airflow to flow to the air outlet to be guided out. The guide cambered surface is arranged in the mounting cavity used for guiding out air flow, the guide cambered surface can reduce the flowing resistance of air in the pipeline, the flowing efficiency of the air flow is improved, the air speed and the air outlet amount are indirectly increased, and the refrigeration effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a unitary air conditioner. Background Art

[0002] A unitary air conditioner is a device that directly provides treated air to an enclosed space, room or area, and has a refrigeration system as well as an air circulation and purification device. Existing unitary air conditioners usually also include a fan, which discharges the airflow generated inside the housing for external use. However, when the fan is installed, it is usually directly discharged at the air outlet or the airflow inside the housing is directly led out through an air duct, so that the distribution of the airflow may be limited, the discharged air volume is small, and the wind speed is relatively low, affecting the overall comfort. Summary of the Utility Model

[0003] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a unitary air conditioner, and the air guide cover for guiding the internal airflow thereof has a guiding arc surface, which reduces the flow resistance of the airflow in the pipeline, thereby improving the flow efficiency of the airflow.

[0004] The technical solution adopted by the utility model to solve its problems is as follows:

[0005] A unitary air conditioner includes:

[0006] A housing having an installation cavity and an air outlet, and the air outlet is communicated with the installation cavity;

[0007] A heat exchange assembly, the heat exchange assembly includes a condenser, an evaporator and a compressor, one end of the compressor is communicated with one end of the condenser, the other end of the condenser is communicated with one end of the evaporator; the other end of the evaporator is communicated with the other end of the compressor;

[0008] A flow guiding assembly, the flow guiding assembly is installed in the installation cavity; the flow guiding assembly includes a fan and an air guide cover, the air guide cover has a flow guiding cavity, the fan is communicated with the flow guiding cavity and is used for guiding the airflow into the flow guiding cavity; the other end of the flow guiding cavity is communicated with the air outlet; the inner wall of the flow guiding cavity has a guiding arc surface, and the guiding arc surface is used for guiding the airflow to flow to the air outlet and be led out.

[0009] Further, a jet nozzle is further provided at one end of the air guide cover close to the air outlet, the jet nozzle extends to the air outlet and abuts against the end wall of the air outlet; the jet nozzle has a jet port, and the jet port is used for leading out the airflow.

[0010] Further, there are two air outlets on the housing, and two jet nozzles are provided. The two jet nozzles are respectively arranged corresponding to the two air outlets.

[0011] Further, a first partition and a second partition are arranged in the installation cavity. The first partition and the second partition are arranged at intervals and divide the installation cavity into a first chamber, a second chamber and a third chamber. One end of the flow guide cover is installed in the first chamber and communicated with the air outlet, and the other end of the flow guide cover extends to the second chamber and is communicated with the blower. The blower and the evaporator are both located in the second chamber; the condenser and the compressor are located in the third chamber.

[0012] Further, the flow guide assembly further includes an air duct, which is located in the second chamber and is respectively communicated with the flow guide cover and the blower.

[0013] Further, the first partition has an installation opening, the air duct is clamped to the installation opening, and the flow guide cover covers the installation opening.

[0014] Further, a support seat is installed on the second partition. The support seat is arranged at an interval from the second partition, and the blower is installed on the support seat.

[0015] Further, the blower is a centrifugal blower.

[0016] Further, a plurality of support columns are provided at the bottom of the housing. The plurality of support columns are distributed at intervals at the bottom of the housing and are used to support the housing.

[0017] Further, a water receiving tray is installed at the bottom of the evaporator; there are two condensers. The two condensers include a first condenser and a second condenser. The first condenser has a first flow channel and a second flow channel. The first flow channel has a first interface and a second interface; the second flow channel exchanges heat with the first flow channel;

[0018] The second condenser has a third flow channel and a fourth flow channel. The third flow channel has a third interface and a fourth interface. One end of the third interface is communicated with the water receiving tray, and the other end of the third interface is communicated with the outside; one end of the fourth flow channel is communicated with the second flow channel, and the other end of the fourth flow channel is communicated with the evaporator. The fourth flow channel exchanges heat with the third flow channel; the compressor is respectively communicated with the second flow channel and the evaporator.

[0019] In summary, a unitary air conditioner provided by the present utility model has the following technical effects: It conducts the flow guide cover to the air outlet and the fan respectively, so as to guide the air flow in the installation cavity to the flow guide cavity through the fan and discharge it through the flow guide cavity. Since the inner wall of the flow guide cavity has a guiding arc surface, the design of the guiding arc surface can optimize the flow path of air in the pipeline, reduce the turbulence phenomenon of the fluid, and reduce the turbulence. The arc surface design can also reduce the flow resistance of air in the pipeline, improve the flow efficiency of the air flow, indirectly increase the wind speed and the air volume, so that the cold generated inside the housing can be effectively discharged, making its refrigeration effect better and the user experience better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic diagram of another perspective of the present utility model;

[0022] Figure 3 is a schematic connection diagram of each component of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the first condenser of the present utility model;

[0024] Figure 5 is a schematic structural diagram of the second condenser of the present utility model;

[0025] Figure 6 is a schematic structural diagram of the first partition of the present utility model;

[0026] Among them, the meanings of the reference numerals are as follows:

[0027] 10, housing; 11, first partition; 111, installation opening; 12, second partition; 121, support seat; 13, first chamber; 14, second chamber; 15, third chamber; 16, air outlet; 17, support column; 20, flow guide assembly; 21, fan; 22, flow guide cover; 221, guiding arc surface; 222, jet nozzle; 2221, jet orifice; 23, air duct; 30, evaporator; 41, first condenser; 411, first flow channel; 4111, first interface; 4112, second interface; 412, second flow channel; 42, second condenser; 421, third flow channel; 4211, third interface; 4212, fourth interface; 422, fourth flow channel; 50, compressor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0031] Referring to Figures 1 to 6 , the present utility model discloses a unitary air conditioner, which includes a housing 10, a heat exchange component, and a flow guiding component 20. The housing 10 has an installation cavity and an air outlet 16. The air outlet 16 is communicated with the installation cavity, and both the heat exchange component and the flow guiding component 20 are installed in the installation cavity. Specifically, the heat exchange component includes a condenser, an evaporator 30, and a compressor 50. One end of the compressor 50 is communicated with one end of the condenser, the other end of the condenser is communicated with one end of the evaporator 30, and the other end of the evaporator 30 is communicated with the other end of the compressor 50; the flow guiding component 20 includes a fan 21 and a flow guiding cover 22. The flow guiding cover 22 has a flow guiding cavity. The fan 21 is communicated with the flow guiding cavity and is used to guide air flow into the flow guiding cavity. The other end of the flow guiding cavity is communicated with the air outlet 16. A guiding arc surface 221 is provided on the inner wall of the flow guiding cavity, and the guiding arc surface 221 can guide the air flow to flow to the air outlet 16 and be discharged.

[0032] On the basis of the above structure, when the device operates, the high-temperature and high-pressure gaseous refrigerant in the compressor 50 enters the condenser and exchanges heat with a cooling medium (such as water or air), releases heat and condenses into a liquid refrigerant. Specifically, the condenser and the evaporator 30 can be connected through a throttle valve, so that the liquid refrigerant passes through the throttle valve and then is introduced into the evaporator 30. In this way, the liquid refrigerant is throttled, and the pressure and temperature are further reduced. After the low-pressure and low-temperature liquid refrigerant enters the evaporator 30, it quickly evaporates into a gas in a low-pressure environment. During the gasification process of the refrigerant, a large amount of heat (i.e., the heat in the installation cavity) is absorbed, so that the temperature of the gas in the installation cavity becomes lower. At this time, the cooled cold air flow in the installation cavity is introduced into the flow guiding cavity under the action of the fan 21, and then flows along the inner wall of the flow guiding cavity to the air outlet 16, and is discharged to the outside through the air outlet 16 under the action of the fan 21 for use in the external environment. At the same time, the gasified refrigerant is sucked into the compressor 50 again to start a new round of refrigeration cycle.

[0033] Specifically, since the inner wall of the diversion cavity has a guiding arc surface 221, the design of the guiding arc surface 221 can optimize the air flow path in the pipeline, reduce the turbulence phenomenon of the fluid. By reducing the turbulence, the arc surface design can also reduce the flow resistance of the air in the pipeline, improve the flow efficiency of the air flow, indirectly increase the wind speed and the air volume. In this way, the cold generated in the installation cavity can be effectively exported, making its refrigeration effect better and the user experience better.

[0034] It should be noted that the diversion cavity can be formed in the diversion cover 22 by mechanical cutting. Of course, the diversion cover 22 can also be formed by enclosing multiple plates, so that a cavity is formed inside to form the diversion cavity. Specifically, one of the plates of the diversion cover 22 can be arc-shaped (as Figure 1 shown), so that the inner wall of the diversion cavity forms a guiding arc surface 221; of course, the guiding arc surface 221 can also be formed on the inner wall of the diversion cover 22 by mechanical cutting, and it can be set according to actual needs specifically.

[0035] In addition, when the fan 21 is assembled with the diversion cover 22, the air inlet end of the fan 21 can be installed on the side close to the evaporator 30, and the air outlet end of the fan 21 is located at one end of the diversion cover 22 away from the air outlet 16. Specifically, the diversion cover 22 can cover the air outlet end of the fan 21, or can be conducted with the air outlet end of the fan 21 through a pipeline, so that the cold generated by the evaporator 30 can be quickly sucked by the fan 21 and blown into the diversion cavity, and then led out through the guiding of the guiding arc surface 221 inside the diversion cavity to the air outlet 16.

[0036] Specifically, the fan 21 can be a centrifugal fan 21 or an exhaust fan 21, etc.

[0037] Preferably, in this embodiment, the fan 21 is a centrifugal fan 21. Compared with other exhaust fans 21 or other ordinary fans 21, the centrifugal fan 21 has a high energy conversion efficiency, can efficiently convert electrical energy or power energy into air flow kinetic energy, provide strong wind force, so that the cold air flow inside the installation cavity can be discharged to the air outlet 16 through the diversion cavity faster and led out, making the external environment cool down faster and refrigerate faster.

[0038] Further, a jet nozzle 222 is provided at one end of the fairing 22 close to the air outlet 16. The jet nozzle 222 extends to the air outlet 16 and abuts against the end wall of the air outlet 16. And the jet nozzle 222 has a jet orifice 2221. Due to the special design of the jet nozzle 222 itself, it can eject high-speed air flow under pressure. This high-speed ejected air flow forms a powerful thrust at the jet orifice 2221, pushing the surrounding air to flow rapidly, thereby increasing the wind speed. So that the cold air flow blown into the diversion cavity by the fan 21 has a greater wind speed after being ejected by the jet, enabling it to quickly export the cold quantity to the outdoors in a short time, enhancing the external cold quantity and achieving better refrigeration effect.

[0039] During assembly, one end of the jet nozzle 222 is connected to the fairing 22 by welding or gluing or other means and is in communication with the diversion cavity. The other end can be inserted into the air outlet 16 and abuts against the end wall of the air outlet 16, and extends outside the installation cavity to be in communication with the outside.

[0040] More specifically, there are two air outlets 16 on the housing 10. Similarly, there are two jet nozzles 222. The two jet nozzles 222 are extended to the two air outlets 16 and installed correspondingly, so that the cold air flow in the diversion cavity can be discharged to the external environment through the jet orifices 2221 of the two jet nozzles 222 at the same time. In this way, in the same time and environment, the cold air discharged by the two jet nozzles 222 is more and faster, enabling the external temperature to drop faster and indirectly enhancing the refrigeration efficiency of the whole structure.

[0041] Preferably, the jet nozzle 222 can be a cylindrical nozzle, a conical nozzle or a fan-shaped nozzle, etc.

[0042] Further, a first partition 11 and a second partition 12 are provided in the installation cavity. The first partition 11 and the second partition 12 are arranged at intervals and divide the installation cavity into a first chamber 13, a second chamber 14 and a third chamber 15. During assembly, one end of the fairing 22 is installed in the first chamber 13 and is in communication with the air outlet 16. The other end of the fairing 22 extends to the second chamber 14 and is in communication with the fan 21. And the fan 21 and the evaporator 30 are both located in the second chamber 14, while the condenser and the compressor 50 are located in the third chamber 15.

[0043] Specifically, since under the same evaporator 30 area, a small-area chamber means a higher proportion of the contact area between the evaporator 30 and the air in the chamber. Therefore, by dividing the installation cavity into three chambers by the first partition 11 and the second partition 12, the area of the chamber where the evaporator 30 is located becomes smaller. In this way, the evaporator 30 can more effectively absorb heat from the chamber air and transfer it to the refrigerant, thereby achieving faster cooling;

[0044] In addition, since both the blower 21 and the evaporator 30 are installed in the second chamber 14, it can ensure that the strong air flow generated by the blower 21 directly acts on the surface of the evaporator 30, and blows the cold air flow in the second chamber 14 out of the diversion chamber more quickly, making the external cooling faster.

[0045] More specifically, since the diversion cover 22, the compressor 50 and the condenser are respectively installed in the first chamber 13 and the third chamber 15, in this way, each component does not interfere with each other during operation and is not easily affected by each other.

[0046] Furthermore, the diversion assembly 20 further includes an air duct 23. The air duct 23 is located in the second chamber 14 and is respectively communicated with the diversion cover 22 and the blower 21.

[0047] Specifically, by connecting the blower 21 and the diversion cover 22 through the air duct 23, it can ensure that the air flow generated by the blower 21 smoothly and orderly enters the diversion cover 22, and then is guided to a predetermined direction. This design avoids the disorder of the air flow and the loss of energy, and improves the overall efficiency of the blower 21.

[0048] More specifically, during assembly, an installation opening 111 is provided on the first partition 11. The air duct 23 can be snap-fitted to the installation opening 111, and the diversion cover 22 covers the installation opening 111 to make the diversion chamber in the diversion cover 22 communicate with the inside of the air duct 23.

[0049] In addition, a support seat 121 is installed on the second partition 12. The support seat 121 is spaced from the second partition 12. During assembly, the blower 21 is installed on the support seat 121, so that a space is formed between the blower 21 and the second partition 12. Therefore, when the blower 21 operates and vibrates, it is not easy to drive the second partition 12 to resonate, avoiding the vibration of the second partition 12 from affecting the structural stability and reducing the risk of noise generation.

[0050] Furthermore, a plurality of support columns 17 are provided at the bottom of the housing 10. The plurality of support columns 17 are spaced apart from each other at the bottom of the housing 10 and are used to support the housing 10.

[0051] Specifically, through the plurality of support columns 17, the weight of the housing 10 can be dispersed to the ground, reducing the single-point pressure, thereby enhancing the stability of the entire device and preventing the device from tilting or being damaged due to uneven ground or insufficient bearing capacity.

[0052] In addition, the housing 10 is supported by the support columns 17, so that there is a space between the housing 10 and the ground, enabling it to avoid the phenomenon of resonance between the internal equipment operation and the ground to a certain extent, and reducing the noise during device use.

[0053] Furthermore, a water receiving tray is installed at the bottom of the evaporator 30. There are two condensers. The two condensers include a first condenser 41 and a second condenser 42. The first condenser 41 has a first flow channel 411 and a second flow channel 412. The first flow channel 411 has a first interface 4111 and a second interface 4112. The second flow channel 412 exchanges heat with the first flow channel 411. The second condenser 42 has a third flow channel 421 and a fourth flow channel 422. The third flow channel 421 has a third interface 4211 and a fourth interface 4212. One end of the third interface 4211 is communicated with the water receiving tray, and the other end of the third interface 4211 is conducted to the outside. One end of the fourth flow channel 422 is conducted to the second flow channel 412, and the other end of the fourth flow channel 422 is communicated with the evaporator 30. The fourth flow channel 422 exchanges heat with the third flow channel 421. The compressor 50 is respectively communicated with the second flow channel 412 and the evaporator 30.

[0054] Based on the above structure, when the air conditioner is cooling, the gaseous refrigerant medium in the compressor 50 needs to be liquefied when introduced into the second flow channel 412. At this time, cold water can be introduced through the first interface 4111 of the first flow channel 411. Since the first flow channel 411 and the second flow channel 412 can exchange heat, and a large amount of heat needs to be released during the liquefaction process of the gaseous refrigerant medium, then the gaseous refrigerant medium can exchange heat with the cold water in the first flow channel 411 after flowing into the second flow channel 412. Through heat exchange, the cold water can absorb the heat released by the gaseous refrigerant medium, thereby reducing its temperature. As the heat is transferred, the temperature of the gaseous refrigerant medium gradually decreases and gradually becomes liquefied, so as to accelerate the liquefaction process of the refrigerant medium in the second flow channel 412 through the cold water. And the cold water can be discharged through the second interface 4112 for external use after getting hot, so that the energy can be effectively utilized.

[0055] At the same time, the liquefied refrigerant medium after heat exchange in the second flow channel 412 flows into the fourth flow channel 422. Since the fourth flow channel 422 and the third flow channel 421 can exchange heat, then, after connecting the third interface 4211 of the third flow channel 421 with the water receiving tray, the condensed water in the water receiving part can be recycled and discharged into the third flow channel 421, and exchange heat with the refrigerant medium in the fourth flow channel 422 to further cool the liquefied refrigerant medium in the fourth flow channel 422, so that the temperature of the refrigerant medium introduced into the evaporator 30 through the fourth flow channel 422 is lower, making the refrigeration effect of the evaporator 30 better. In this way, the condensed water in the water receiving part can be recycled, and at the same time, the refrigeration effect of the evaporator 30 is indirectly improved.

[0056] When the air conditioner is in the heating mode, the refrigerant medium discharged into the second flow channel 412 in the compressor 50 is in a liquid state and needs to be vaporized. At this time, water at room temperature can be introduced into the first flow channel 411 through the first interface 4111 as needed. Since the liquid refrigerant medium needs to absorb a large amount of heat during the vaporization process, a large amount of cold energy will be released during this process. In this way, the water in the first flow channel 411 can be cooled, and then the cooled water can be discharged through the second interface 4112 for external use, avoiding energy waste.

[0057] Specifically, both the first condenser 41 and the second condenser 42 can adopt heat exchange sleeves, fixed tube sheet heat exchangers, floating head heat exchangers, etc. When using a heat exchange sleeve, the flow channels inside the two sleeves are respectively formed as the first flow channel 411, the second flow channel 412, or the third flow channel 421 and the fourth flow channel 422; when using a fixed tube sheet heat exchanger or a floating head heat exchanger, the first flow channel 411 can be formed between the housing 10 and the heat exchange plate or heat exchange fins, and the second flow channel 412 can be formed by mechanical cutting inside the heat exchange plate or by arranging heat exchange tubes inside the plate, etc., so that two flow channels are formed inside, and the third flow channel 421 and the fourth flow channel 422 are also arranged in this way.

[0058] In addition, the water receiving tray can adopt a water receiving tray with a diversion groove. By setting a diversion groove on the surface of the water receiving tray, the condensed water generated by the evaporator 30 can be concentrated in the diversion groove and then discharged; or a U-shaped water receiving tray, the shape of which corresponds to the bottom of the evaporator 30, so that it can more effectively collect and guide the condensed water; of course, it can also be a flat or slightly inclined disk-shaped structure for directly receiving the condensed water dripping from the evaporator 30 or other condensing components.

[0059] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A unit-type air conditioner, characterized in that: include: A housing having a mounting cavity and an air outlet, wherein the air outlet is in communication with the mounting cavity; A heat exchange assembly, the heat exchange assembly is installed in the installation cavity; the heat exchange assembly includes a condenser, an evaporator and a compressor, one end of the compressor is connected to one end of the condenser, the other end of the condenser is connected to one end of the evaporator; the other end of the evaporator is connected to the other end of the compressor; A flow guide component, wherein the flow guide component is installed in the installation cavity; the flow guide component includes a fan and a flow guide cover, the flow guide cover has a flow guide cavity, the fan is connected to the flow guide cavity, and is used to guide the airflow into the flow guide cavity; the other end of the flow guide cavity is connected to the air outlet; the inner wall of the flow guide cavity has a guiding arc surface, and the guiding arc surface is used to guide the airflow to flow to the air outlet for output.

2. The unit-type air conditioner according to claim 1, characterized in that: A jet nozzle is also provided at one end of the air guide cover close to the air outlet. The jet nozzle extends to the air outlet and abuts against the end wall of the air outlet. The jet nozzle has a jet port, and the jet port is used to guide the airflow.

3. The unit-type air conditioner according to claim 2, characterized in that: The shell is provided with two air outlets, and two jet nozzles are provided, and the two jet nozzles are respectively arranged corresponding to the two air outlets.

4. The unit-type air conditioner according to claim 1, wherein: A first partition and a second partition are provided in the installation cavity. The first partition and the second partition are spaced apart and divide the installation cavity into a first chamber, a second chamber and a third chamber. One end of the air deflector is installed in the first chamber and is connected to the air outlet, and the other end of the air deflector extends to the second chamber and is connected to the fan. The fan and the evaporator are located in the second chamber; the condenser and the compressor are located in the third chamber.

5. The unit-type air conditioner according to claim 4, characterized in that: The air guide component also includes an air duct, which is located in the second chamber and is connected to the air guide cover and the fan respectively.

6. The unit-type air conditioner according to claim 5, characterized in that: The first partition plate has a mounting opening, the air duct is clamped to the mounting opening, and the air guide cover is sealed on the mounting opening.

7. The unit-type air conditioner according to claim 4, characterized in that: A support base is installed on the second partition plate, the support base is spaced apart from the second partition plate, and the fan is installed on the support base.

8. The unit-type air conditioner according to any one of claims 1 to 7, characterized in that: The fan is a centrifugal fan.

9. The unit-type air conditioner according to claim 1, wherein: A plurality of supporting columns are arranged at the bottom of the shell, and the plurality of supporting columns are distributed at intervals at the bottom of the shell and are used to support the shell.

10. The unit-type air conditioner according to claim 1, wherein: A water receiving tray is installed at the bottom of the evaporator; two condensers are provided, the two condensers include a first condenser and a second condenser, the first condenser has a first flow channel and a second flow channel, the first flow channel has a first interface and a second interface; the second flow channel exchanges heat with the first flow channel; The second condenser has a third flow channel and a fourth flow channel, the third flow channel has a third interface and a fourth interface, one end of the third interface is connected to the water receiving tray, and the other end of the third interface is connected to the outside; one end of the fourth flow channel is connected to the second flow channel, and the other end of the fourth flow channel is connected to the evaporator, and the fourth flow channel exchanges heat with the third flow channel; The compressor is communicated with the second flow channel and the evaporator respectively.

Images