Kitchen air conditioner with function of preventing liquid in heat exchanger from remaining

Abstract

A kitchen air conditioner with a function of preventing liquid in a heat exchanger from remaining comprises a shell and a refrigeration assembly. An air inlet and an air outlet are formed in the shell; the refrigeration assembly is arranged in the shell and at least comprises a compressor, a heat exchanger and an evaporator, and the evaporator is located on the inner side of the air inlet; the refrigeration assembly further comprises a refrigerant pipeline and a liquid pipeline. The heat exchanger is composed of a plurality of heat exchange pipes, each heat exchange pipe internally comprises a refrigerant channel and a liquid channel, and the refrigerant channels in the heat exchange pipes are connected in series in a refrigerant pipeline; the liquid channels in the heat exchange pipes are connected in parallel in the liquid pipeline; the liquid channels of the heat exchange tubes are arranged in parallel, so that liquid for heat exchange can independently pass through each heat exchange tube, and when a machine stops running, residual liquid in the liquid channel of each heat exchange tube can be independently discharged, the residual liquid in the heat exchange tubes of the air conditioner can be more thoroughly discharged, and the heat exchange efficiency of the air conditioner is improved. And therefore, the condition of blockage or corrosion in the heat exchange pipe is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of integrated air conditioners, specifically to a kitchen air conditioner with a function to prevent liquid residue in the heat exchanger. Background Technology

[0002] An all-in-one air conditioner is a device used to regulate temperature. This device is suitable for equipment rooms of various mobile communication operators, research institutes, hospitals, enterprises and other units. With the continuous development of technology, the size of these all-in-one air conditioners is gradually shrinking, so they are no longer limited to commercial use. Some all-in-one air conditioners for home use have also begun to appear on the market.

[0003] The aforementioned integrated household air conditioners are mainly used in smaller spaces such as kitchens and bathrooms. Air conditioners used in kitchens are mainly used for cooling in the summer, and their main usage time is often less than half a year. Therefore, compared with fixed, non-removable wall-mounted air conditioners, integrated air conditioners are more flexible and can be moved according to the user's needs.

[0004] Chinese patent ZL202420881119.3 discloses: "An integrated air conditioner, comprising: a shell, the shell forming an indoor air intake zone and an indoor air supply zone; a fan volute, the fan volute being disposed within the installation space enclosed by the shell, the fan volute forming a receiving space, an air inlet zone, and an air outlet zone, the receiving space for accommodating an indoor fan, the air inlet zone and the air outlet zone being connected through the receiving space so that airflow entering through the indoor air intake zone and the air inlet zone is guided by the fan volute to the air outlet zone and the indoor air supply zone; and a liquid storage container, the liquid storage container for storing humidifying liquid, the liquid storage container being disposed on the bottom side of the fan volute, and the liquid inlet of the liquid storage container being connected to the receiving space so that liquid injected from the indoor air supply zone is guided by the fan volute to the liquid storage container. When it is necessary to replenish water to the liquid storage container, no additional operation of the container is required; water can be added directly from the indoor air supply zone to the shell, greatly facilitating the replenishment operation of the liquid storage container."

[0005] When considering solutions including those in the aforementioned patents, existing integrated air conditioners on the market all share a problem: because integrated air conditioners lack an outdoor unit and are smaller in overall size compared to regular air conditioners, the space inside for refrigerant heat exchange is very limited. In particular, as the cooling power requirements of integrated air conditioners continue to increase, the power of their internal compressors is also increasing. To keep up with the compressor power, existing integrated air conditioners on the market generally use liquid cooling to exchange heat with the refrigerant. This is achieved by connecting the liquid pipes of the heat exchange tubes in series, allowing the liquid to pass through each heat exchange tube sequentially to absorb heat from the refrigerant. However, this series connection method results in some liquid remaining in each heat exchange tube after the machine stops running. Over time, this can easily lead to blockage or corrosion of the liquid pipes in the heat exchange tubes, thereby damaging the entire machine. Summary of the Invention

[0006] In order to overcome the shortcomings of existing integrated air conditioners where the liquid pipelines of the heat exchanger tubes are connected in series, resulting in liquid residue, this utility model provides a kitchen air conditioner with a function to prevent liquid residue in the heat exchanger.

[0007] The technical solution of this utility model to solve its technical problem is: a kitchen air conditioner with a function of preventing liquid residue in the heat exchanger, comprising:

[0008] The housing has an air inlet and an exhaust outlet.

[0009] A refrigeration assembly disposed within a housing and comprising at least a compressor, a heat exchanger, and an evaporator, wherein the evaporator is located inside the air inlet;

[0010] The refrigeration assembly also includes refrigerant pipelines and liquid pipelines. The compressor, heat exchanger, and evaporator are interconnected through refrigerant pipelines to achieve refrigerant circulation. The heat exchanger is connected to an external liquid source through liquid pipelines to achieve liquid circulation.

[0011] The heat exchanger consists of several heat exchange tubes, and each heat exchange tube includes a refrigerant channel and a liquid channel. The refrigerant channels in each heat exchange tube are connected in series in the refrigerant pipeline.

[0012] The liquid channels within each of the heat exchange tubes are connected in parallel within the liquid pipeline.

[0013] Furthermore, the liquid channel also includes an inlet and an outlet located on the heat exchange tube. The liquid pipeline includes an inlet connector and an outlet connector for connecting to an external liquid source. The inlet connector is connected to the inlet of each heat exchange tube, and the outlet connector is connected to the outlet of each heat exchange tube, so that the liquid channels in each heat exchange tube are connected in parallel.

[0014] Furthermore, the liquid pipeline includes a main inlet pipe and a main outlet pipe; one end of the main inlet pipe is connected to an inlet connector, and the other end of the main inlet pipe branches off into several branch pipes via a multi-port connector, each branch pipe corresponding to the inlet of each heat exchange tube; one end of the main outlet pipe is connected to an outlet connector, and the other end of the main outlet pipe branches off into several branch pipes via a multi-port connector, each branch pipe corresponding to the outlet of each heat exchange tube.

[0015] Furthermore, the liquid inlet of each heat exchange tube is located at its upper end and the liquid outlet is located at its lower end, so that the liquid in the liquid channel of the heat exchange tube can flow downward under the action of gravity when no other external force is applied.

[0016] Furthermore, the liquid inlet main pipe is also connected to a vent valve, which can control the connection or isolation between the inside of the liquid inlet main pipe and the outside air.

[0017] Furthermore, the inlet main pipe is also equipped with an inlet valve and an inlet pump, and the outlet main pipe is also equipped with an outlet valve.

[0018] Furthermore, the refrigeration assembly also includes a condensate pipe, one end of which is connected to the evaporator and the other end is connected to a multi-port connector on the liquid inlet pipe, so that the condensate generated by the evaporator can flow into the liquid channel through the condensate pipe.

[0019] Furthermore, two through holes are provided at the bottom of the housing, through which the liquid inlet connector and the liquid outlet connector extend to the outside of the housing.

[0020] Furthermore, the heat exchange tubes include a starting heat exchange tube, an intermediate heat exchange tube, and a ending heat exchange tube; the refrigerant channel also includes a refrigerant inlet and a refrigerant outlet; wherein the refrigerant inlet of the starting heat exchange tube is connected to the compressor, the refrigerant outlet of the starting heat exchange tube is connected to the refrigerant inlet of the intermediate heat exchange tube, the refrigerant outlet of the intermediate heat exchange tube is connected to the refrigerant inlet of the ending heat exchange tube, and the refrigerant outlet of the ending heat exchange tube is connected to the evaporator, thereby enabling the refrigerant channels of each heat exchange tube to be connected in series in the refrigerant pipeline.

[0021] Furthermore, it also includes an air supply assembly located inside the housing and used to supply air from the air inlet to the air outlet, with the evaporator located between the air inlet and the air supply assembly.

[0022] The refrigeration process of this utility model:

[0023] The refrigerant used to cool the air circulates within the refrigeration system. First, the gaseous refrigerant is pressurized and heated by the compressor. Then, the gaseous refrigerant enters the heat exchanger through the refrigerant piping. In the heat exchanger, the gaseous refrigerant exchanges heat and releases heat, becoming liquid. Finally, the low-temperature, low-pressure liquid refrigerant enters the evaporator through the refrigerant piping to absorb heat from the air at the air inlet, thus lowering the air temperature at the inlet. Ultimately, under the action of the air supply components, cool air is blown out from the exhaust outlet. Meanwhile, the liquid refrigerant in the evaporator... The heat absorbed in the liquid will turn back into a gaseous state and eventually flow back to the compressor through the refrigerant pipeline. The heat exchange process of the heat exchanger for the refrigerant in the above process is as follows: First, the external liquid will enter the main inlet pipe under the action of the liquid inlet pump, and then be distributed to each liquid inlet branch pipe by the multi-port connector. Then, the liquid will enter the starting heat exchange tube, the intermediate heat exchange tube and the ending heat exchange tube through the liquid inlet branch pipe. After the liquid absorbs heat in each heat exchange tube, it will be discharged to the liquid outlet branch pipe. Finally, all the liquid will be discharged to the outside of the machine through the liquid outlet main pipe.

[0024] The liquid residue prevention process of this utility model:

[0025] When the machine stops running, the vent valve on the liquid main pipe opens, allowing the inside of the liquid main pipe to connect with the air outside the pipe. This balances the air pressure inside and outside the liquid pipeline, allowing the residual liquid in the liquid channels of each heat exchange tube to fall under the influence of gravity and eventually be discharged outside the machine through the liquid outlet main pipe.

[0026] The beneficial effects of this utility model are as follows:

[0027] 1. The liquid channels of the heat exchange tubes are connected in parallel, so that the liquid used for heat exchange passes through each heat exchange tube individually. When the machine stops running, the liquid remaining in the liquid channel of each heat exchange tube can also be discharged individually. Compared with the method of connecting the liquid channels in series, the residual liquid in the heat exchange tubes of this air conditioner can be discharged more thoroughly, thereby effectively avoiding blockage or corrosion in the heat exchange tubes.

[0028] 2. A vent valve is also installed on the liquid inlet main pipe. When the air conditioner stops running and drains liquid, the vent valve can connect the liquid pipeline with the outside air to eliminate the pressure difference and ensure that the residual liquid can be discharged smoothly under the action of gravity.

[0029] 3. A condensate pipe is also installed in the refrigeration unit, which connects to the liquid pipeline, thereby completing the recycling of condensate and ensuring that condensate can also be discharged smoothly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] Figure 2 This is an exploded schematic diagram of this utility model.

[0032] Figure 3 This is a schematic diagram of the refrigeration component in this utility model.

[0033] Figure 4 This is a schematic diagram showing the connection of the liquid pipeline inside the refrigeration component of this utility model at one angle.

[0034] Figure 5 This is a schematic diagram showing the connection of the liquid pipeline inside the refrigeration component in this utility model from another angle.

[0035] Figure 6 This is a schematic diagram showing the connection between the liquid pipeline and the condensate pipe inside the refrigeration component in this utility model.

[0036] Figure 7 This is a schematic diagram of the refrigerant piping connection within the refrigeration component of this utility model.

[0037] Figure 8 This is a structural schematic diagram of the heat exchanger at one angle in this utility model.

[0038] Figure 9 This is a structural schematic diagram of the heat exchanger from another angle in this utility model.

[0039] Figure 10 This is a block diagram of the connection module of the liquid pipeline inside the refrigeration component in this utility model.

[0040] Figure 11 This is a block diagram of the connection module of the refrigerant pipeline in the refrigeration component of this utility model.

[0041] The diagram is labeled as follows: 1. Shell; 2. Air inlet; 3. Exhaust outlet; 4. Refrigeration assembly; 5. Compressor; 6. Heat exchanger; 7. Evaporator; 8. Refrigerant piping; 9. Liquid piping; 10. Heat exchange tube; 11. Liquid inlet; 12. Liquid outlet; 13. Liquid inlet connector; 14. Liquid outlet connector; 15. Main liquid inlet pipe; 16. Main liquid outlet pipe; 17. Liquid inlet branch pipe; 18. Liquid outlet branch pipe; 19. Vent valve; 20. Liquid inlet valve; 21. Liquid inlet pump; 22. Liquid outlet valve; 23. Condensate pipe; 24. Through hole; 25. Starting heat exchange tube; 26. Intermediate heat exchange tube; 27. Ending heat exchange tube; 28. Refrigerant inlet; 29. ​​Refrigerant outlet; 30. Air supply assembly; 31. Condensate pump. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0044] Example

[0045] Combination Figures 1 to 11 A kitchen air conditioner with a liquid residue prevention function in a heat exchanger 6 is shown, comprising a housing 1 and a refrigeration assembly 4; the housing 1 is provided with an air inlet 2 and an exhaust outlet 3; the refrigeration assembly 4 is disposed inside the housing 1 and includes at least a compressor 5, a heat exchanger 6, and an evaporator 7, wherein the evaporator 7 is located inside the air inlet 2; the refrigeration assembly 4 also includes a refrigerant pipeline 8 and a liquid pipeline 9, the compressor 5, the heat exchanger 6, and the evaporator 7 are interconnected through the refrigerant pipeline 8 to achieve refrigerant circulation, and the heat exchanger 6 is connected to an external liquid source through the liquid pipeline 9 to achieve liquid circulation; the heat exchanger 6 is composed of a plurality of heat exchange tubes 10, and each heat exchange tube 10 includes a refrigerant channel and a liquid channel, the refrigerant channels in each heat exchange tube 10 are connected in series in the refrigerant pipeline 8; the liquid channels in each heat exchange tube 10 are connected in parallel in the liquid pipeline 9.

[0046] Combination Figure 4 , Figure 5 and Figures 8 to 10 As shown, in this embodiment, the liquid channel further includes an inlet 11 and an outlet 12 located on the heat exchange tube 10. The liquid pipeline 9 includes an inlet connector 13 and an outlet connector 14 for connecting to an external liquid source. The inlet connector 13 is connected to the inlet 11 of each heat exchange tube 10, and the outlet connector 14 is connected to the outlet 12 of each heat exchange tube 10, so that the liquid channels in each heat exchange tube 10 are connected in parallel.

[0047] Combination Figure 4 , Figure 5 and Figure 10As shown, in this embodiment, the liquid pipeline 9 includes a main inlet pipe 15 and a main outlet pipe 16. One end of the main inlet pipe 15 is connected to the inlet connector 13, and the other end of the main inlet pipe 15 branches into several inlet branch pipes 17 through a multi-port connector. Each inlet branch pipe 17 is connected to the inlet port 11 of each heat exchange tube 10. One end of the main outlet pipe 16 is connected to the outlet connector 14, and the other end of the main outlet pipe 16 branches into several outlet branch pipes 18 through a multi-port connector. Each outlet branch pipe 18 is connected to the outlet port 12 of each heat exchange tube 10.

[0048] Combination Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, in this embodiment, the liquid inlet 11 of each heat exchange tube 10 is located at its upper end and the liquid outlet 12 is located at its lower end, so that the liquid in the liquid channel of the heat exchange tube 10 can flow downward under the action of gravity when it is not subjected to other external forces.

[0049] Combination Figure 4 and Figure 10 As shown, in this embodiment, the liquid inlet main pipe 15 is also connected to a vent valve 19, which can control the communication or isolation between the inside of the liquid inlet main pipe 15 and the outside air.

[0050] Combination Figure 4 , Figure 5 and Figure 10 As shown, in this embodiment, the inlet pipe 15 is also equipped with an inlet valve 20 and an inlet pump 21, and the outlet pipe 16 is also equipped with an outlet valve 22.

[0051] Combination Figure 6 Figure 10 As shown, in this embodiment, the refrigeration component 4 also includes a condensate pipe 23. One end of the condensate pipe 23 is connected to the evaporator 7, and the other end is connected to the multi-port connector on the liquid inlet pipe 15, so that the condensate generated by the evaporator 7 can flow into the liquid channel through the condensate pipe 23.

[0052] Combination Figure 6 Figure 10 As shown, in this embodiment, a condensate pump 31 is also connected to the condensate pipe 23, and the condensate discharged from the evaporator 7 is discharged into the liquid pipeline 9 under the action of the condensate pump 31.

[0053] Among them, such as Figure 1 As shown in the figure, in this embodiment, two through holes 24 are provided at the bottom of the housing 1, and the liquid inlet connector 13 and the liquid outlet connector 14 extend to the outside of the housing 1 through the through holes 24.

[0054] Combination Figures 7 to 9 and Figure 11 As shown, in this embodiment, the heat exchange tube 10 includes a starting heat exchange tube 25, an intermediate heat exchange tube 26, and a ending heat exchange tube 27; the refrigerant channel also includes a refrigerant inlet 28 and a refrigerant outlet 29; wherein the refrigerant inlet 28 of the starting heat exchange tube 25 is connected to the compressor 5, the refrigerant outlet 29 of the starting heat exchange tube 25 is connected to the refrigerant inlet 28 of the intermediate heat exchange tube 26, the refrigerant outlet 29 of the intermediate heat exchange tube 26 is connected to the refrigerant inlet 28 of the ending heat exchange tube 27, and the refrigerant outlet 29 of the ending heat exchange tube 27 is connected to the evaporator 7, thereby enabling the refrigerant channels of each heat exchange tube 10 to be connected in series in the refrigerant pipeline 8.

[0055] Among them, such as Figure 2 As shown in the figure, this embodiment also includes an air supply assembly 30, which is located inside the housing 1 and is used to supply air from the air inlet 2 to the air outlet. The evaporator 7 is located between the air inlet 2 and the air supply assembly 30.

[0056] The cooling process in this embodiment:

[0057] The refrigerant used for cooling the air circulates within the refrigeration unit 4. First, the gaseous refrigerant is pressurized and heated by the compressor 5. Then, the gaseous refrigerant enters the heat exchanger 6 through the refrigerant pipe 8. In the heat exchanger 6, the gaseous refrigerant exchanges heat and releases heat, becoming liquid. Finally, the low-temperature, low-pressure liquid refrigerant enters the evaporator 7 through the refrigerant pipe 8 to absorb heat from the air at the air inlet 2, thereby lowering the air temperature at the air inlet 2. Finally, under the action of the air supply unit 30, cold air is blown out from the exhaust port 3, while the liquid refrigerant absorbs heat in the evaporator 7. It will turn back into a gaseous state and eventually flow back to the compressor 5 through the refrigerant line 8; the heat exchange process of the heat exchanger 6 for the refrigerant in the above process is as follows: first, the external liquid will enter the inlet main pipe 15 under the action of the inlet pump 21, and then be dispersed to each inlet branch pipe 17 by the multi-port connector. Then, the liquid enters the starting heat exchange tube 25, the intermediate heat exchange tube 26 and the ending heat exchange tube 27 through the inlet branch pipe 17. After the liquid absorbs heat in each heat exchange tube 10, it is discharged to the outlet branch pipe 18. Finally, all the liquid is discharged to the outside of the machine through the outlet main pipe 16.

[0058] The liquid residue prevention process in this embodiment:

[0059] When the machine stops running, the vent valve 19 on the liquid main pipe opens, allowing the inside of the liquid main pipe to communicate with the air outside the pipe. This balances the air pressure inside and outside the liquid pipe 9, allowing the residual liquid in each heat exchange tube 10 and liquid pipe 9 to fall under the influence of gravity and finally be discharged outside the machine through the liquid outlet main pipe 16.

[0060] The advantage of this embodiment is that the liquid channels of the heat exchange tubes are arranged in parallel, so that the cooling liquid can pass through each heat exchange tube separately, and the residual liquid in the heat exchange tubes can be smoothly discharged under the action of gravity after the machine stops, thereby effectively avoiding liquid residue in the heat exchange tubes.

[0061] The above specific embodiments are merely explanations of the present utility model and are not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to the embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

Claims

1. A kitchen air conditioner with a function to prevent liquid residue in the heat exchanger, comprising: The housing (1) is provided with an air inlet (2) and an exhaust outlet (3); A refrigeration assembly (4) is disposed within a housing (1) and includes at least a compressor (5), a heat exchanger (6) and an evaporator (7), wherein the evaporator (7) is located inside the air inlet (2); The refrigeration component (4) also includes a refrigerant pipeline (8) and a liquid pipeline (9). The compressor (5), heat exchanger (6) and evaporator (7) are interconnected through the refrigerant pipeline (8) to achieve refrigerant circulation. The heat exchanger (6) is connected to an external liquid source through the liquid pipeline (9) to achieve liquid circulation. The heat exchanger (6) is composed of several heat exchange tubes (10), and each heat exchange tube (10) includes a refrigerant channel and a liquid channel. The refrigerant channels in each heat exchange tube (10) are connected in series in the refrigerant pipeline (8). Its features are: The liquid channels in each of the heat exchange tubes (10) are connected in parallel in the liquid pipeline (9).

2. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 1, characterized in that: The liquid channel also includes an inlet (11) and an outlet (12) located on the heat exchange tube (10). The liquid pipeline (9) includes an inlet connector (13) and an outlet connector (14) for connecting to an external liquid source. The inlet connector (13) is connected to the inlet (11) of each heat exchange tube (10), and the outlet connector (14) is connected to the outlet (12) of each heat exchange tube (10), so that the liquid channels in each heat exchange tube (10) are connected in parallel.

3. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 2, characterized in that: The liquid pipeline (9) includes a liquid inlet main pipe (15) and a liquid outlet main pipe (16); one end of the liquid inlet main pipe (15) is connected to the liquid inlet connector (13), and the other end of the liquid inlet main pipe (15) branches into several liquid inlet branch pipes (17) through a multi-port connector, and the liquid inlet branch pipes (17) are connected one-to-one with the liquid inlet (11) of each heat exchange tube (10); one end of the liquid outlet main pipe (16) is connected to the liquid outlet connector (14), and the other end of the liquid outlet main pipe (16) branches into several liquid outlet branch pipes (18) through a multi-port connector, and the liquid outlet branch pipes (18) are connected one-to-one with the liquid outlet (12) of each heat exchange tube (10).

4. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 2, characterized in that: Each heat exchange tube (10) has an inlet (11) at its upper end and an outlet (12) at its lower end, so that the liquid in the liquid channel of the heat exchange tube (10) can flow downward under the action of gravity when no other external force is applied.

5. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 3, characterized in that: The liquid inlet pipe (15) is also connected to a vent valve (19), which can control the connection or isolation between the inside of the liquid inlet pipe (15) and the outside air.

6. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 3, characterized in that: The inlet pipe (15) is also equipped with an inlet valve (20) and an inlet pump (21), and the outlet pipe (16) is also equipped with an outlet valve (22).

7. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 3, characterized in that: The refrigeration assembly (4) also includes a condensate pipe (23), one end of which is connected to the evaporator (7) and the other end is connected to the multi-port connector on the liquid inlet pipe (15) so that the condensate generated by the evaporator (7) can flow into the liquid channel through the condensate pipe (23).

8. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 2, characterized in that: The bottom of the housing (1) has two through holes (24), through which the liquid inlet connector (13) and liquid outlet connector (14) extend to the outside of the housing (1).

9. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 1, characterized in that: The heat exchange tube (10) includes a starting heat exchange tube (25), an intermediate heat exchange tube (26), and a ending heat exchange tube (27); the refrigerant channel also includes a refrigerant inlet (28) and a refrigerant outlet (29); wherein the refrigerant inlet (28) of the starting heat exchange tube (25) is connected to the compressor (5), the refrigerant outlet (29) of the starting heat exchange tube (25) is connected to the refrigerant inlet (28) of the intermediate heat exchange tube (26), the refrigerant outlet (29) of the intermediate heat exchange tube (26) is connected to the refrigerant inlet (28) of the ending heat exchange tube (27), and the refrigerant outlet (29) of the ending heat exchange tube (27) is connected to the evaporator (7), thereby enabling the refrigerant channels of each heat exchange tube (10) to be connected in series in the refrigerant pipeline (8).

10. A kitchen air conditioner with anti-residue function for liquid inside the heat exchanger according to claim 1, characterized in that: It also includes an air supply assembly (30), which is located inside the housing (1) and is used to supply air from the air inlet (2) to the air outlet, and the evaporator (7) is located between the air inlet (2) and the air supply assembly (30).

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