High-power cooling and heating air conditioner

Abstract

The high-power air conditioner comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a throttling capillary tube, a main electronic expansion valve and the like, the outdoor heat exchanger comprises fins and a heat exchange tube set, and the heat exchange tube set comprises a first branch, a second branch, a third branch and a fourth branch; the heat exchange pipes of the first branch and the fourth branch are arranged on the upper portion and the lower portion of the outdoor heat exchanger respectively, and the heat exchange pipes of the second branch and the third branch are arranged in the middle of the outdoor heat exchanger. The total length of the heat exchange tubes of the first branch and the total length of the heat exchange tubes of the fourth branch are both larger than the total length of the heat exchange tubes of the second branch and the total length of the heat exchange tubes of the third branch. Through reasonable arrangement of the heat exchange pipes in the outdoor heat exchanger, temperature distribution of the outdoor heat exchanger caused by wind speed difference between the center and the edge of the axial flow fan is avoided, ice blockage of the heat exchange pipes is prevented, and the machine is more suitable for cold areas in winter.

Description

Technical Field

[0001] The invention relates to the technical field of window air conditioners, in particular to a high-power cooling and heating air conditioner. Background Art

[0002] Window air conditioners generally have heating functions in addition to cooling functions, but the cooling functions of window air conditioners are currently mostly not suitable for areas with colder winters, such as North America and Northern Europe. The reasons include that the compressor power used in general window air conditioners is not large enough to transfer enough heat from the outdoors to the indoors; the axial flow fan center and edge wind speed of the commonly used window air conditioners on the market have differences, which makes the temperature distribution of the outdoor heat exchanger uneven, and it is easy to cause ice blockage in severe cold environments, resulting in machine failure. Therefore, in North America, Northern Europe and other places, ordinary families need to purchase air conditioners for cooling in summer and electric heaters for heating in winter, which is costly and inconvenient. Secondly, when the window air conditioner is working, condensation water will be generated on the heat exchanger. Window-type cold and warm air conditioners have both cooling and heating functions. When it works in summer, condensation water is generated on the indoor heat exchanger, and when it works in winter, condensation water is generated on the outdoor heat exchanger. In some areas, the outdoor temperature is low in winter, and condensation water is easy to freeze and block the drain pipe, resulting in failure to drain normally, creating safety hazards. This limits the application of window air conditioners in colder areas. Summary of the invention

[0003] The purpose of the present invention is to provide a high-power cooling and heating air conditioner that can adapt to the environment of colder areas in winter and solve the problem that condensed water is easily frozen when the window-type cooling and heating air conditioner is working in winter, so as to overcome the shortcomings of the prior art.

[0004] The technical solution of the present invention is: a high-power cooling and heating air conditioner, including a chassis and a refrigeration system, the refrigeration system including a crossflow fan, an axial flow fan, a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a throttling capillary, a main electronic expansion valve, a flash evaporator and a one-way solenoid valve; the chassis includes an indoor cavity and an outdoor cavity, and the indoor cavity and the outdoor cavity are separated by a partition; the crossflow fan and the indoor heat exchanger are arranged in the indoor cavity; the axial flow fan, the compressor and the outdoor heat exchanger are arranged in the outdoor cavity; it is characterized in that the outdoor heat exchanger includes fins and a heat exchange tube group, the heat exchange tube group includes a first branch, a second branch, a third branch, and a fourth branch; the heat exchange tubes of the first branch are arranged at the upper part of the outdoor heat exchanger, the heat exchange tubes of the second branch are arranged at the middle part of the outdoor heat exchanger close to the axial flow fan side, the heat exchange tubes of the third branch are arranged at the middle part of the outdoor heat exchanger away from the axial flow fan side, and the heat exchange tubes of the fourth branch are arranged at the lower part of the outdoor heat exchanger; the total length of the heat exchange tubes of the first branch and the total length of the heat exchange tubes of the fourth branch are both greater than the total length of the heat exchange tubes of the second branch and the total length of the heat exchange tubes of the third branch;

[0005] A water receiving pan is provided below the outdoor heat exchanger, and the water receiving pan is connected to a first drain pipe through a drainage channel. The first drain pipe is located on the indoor side, and a drain valve is provided between the first drain pipe and the water receiving pan.

[0006] The above-mentioned high-power heating and cooling air conditioner, the indoor cavity includes a first bottom plate, and a second drainage pipe is led out from the bottom of the indoor cavity and passes through the partition to the outdoor cavity; the axial flow fan includes fan blades and an outer ring, and the fan blades and the outer ring are connected by a water block.

[0007] In the above-mentioned high-power cooling and heating air conditioner, the outdoor cavity includes a second bottom plate, the second bottom plate protrudes upward to form a platform, and the water receiving tray is surrounded by the edge of the platform and the side wall of the outdoor cavity.

[0008] In the above-mentioned high-power cooling and heating air conditioner, the temperature-controlled drain valve has an elastic airbag inside, the elastic airbag is connected to the valve stem, and the valve stem is connected to the plug.

[0009] In the above-mentioned high-power cooling and heating air conditioner, the indoor cavity also includes an electric heater; the compressor is a 4.5-6.8kW high-power variable frequency compressor.

[0010] In the above-mentioned high-power cooling and heating air conditioner, the one-way solenoid valve is controlled by the main control chip, closed in the air conditioning cooling mode, and opened in the heating mode; the four-way valve includes ports A, B, C, and D, the A port is connected to the compressor outlet, the B port is connected to the outdoor heat exchanger, the C port is connected to the compressor return port, and the D port is connected to the indoor heat exchanger; the flash evaporator includes ports E, F, and G, the E port is connected to the throttling capillary, the F port is connected to the one-way solenoid valve, and the G port is connected to the compressor enthalpy increase port.

[0011] In the above-mentioned high-power cooling and heating air conditioner, the water receiving tray and / or the bottom surface of the drainage channel are affixed with a heating film. The air conditioning cooling mode and heating mode use different power inputs, and the power input switching is achieved through a relay.

[0012] In the above-mentioned high-power cooling and heating air conditioner, each branch of the heat exchange tube group includes a plurality of heat exchange tubes, and the heat exchange tubes are connected at the ends by U-shaped tubes; the outdoor heat exchanger includes a liquid / gas inlet pipe and a liquid / gas outlet pipe, the liquid / gas inlet pipe is divided into four small tubes respectively connected to the inlets of the four branch pipes of the heat exchange tube group, and the liquid / gas outlet pipe is divided into four small tubes respectively connected to the outlets of the four branch pipes of the heat exchange tube group.

[0013] The present invention has the following beneficial effects:

[0014] 1) The present invention provides a high-power cooling and heating air conditioner. Through the reasonable arrangement of the heat exchange tubes in the outdoor heat exchanger, the problem of uneven temperature distribution of the outdoor heat exchanger caused by the difference in wind speed between the center and the edge of the axial flow fan is avoided, and the possibility of ice blockage of the heat exchange tubes of the outdoor heat exchanger is reduced, making the machine more suitable for colder areas in winter. The cooling and heating modes use different power inputs, which is suitable for the actual situation of two sets of electricity charging methods for cooling and heating in North America.

[0015] 2) High-power air conditioners have a special drainage structure, which directs condensed water from indoors to outdoors in cooling mode and from outdoors to indoors in heating mode. This avoids the problem of condensed water freezing when the ambient temperature is low in winter, resulting in poor drainage, allowing window air conditioners to be used in colder environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of a high-power window-type cooling and heating air conditioner according to the present invention.

[0017] Figure 2 This is a schematic diagram of the internal drainage structure of a high-power window-type air conditioner in cooling mode according to the present invention.

[0018] Figure 3 This is a schematic diagram of the internal drainage structure of a high-power window-type air conditioner in heating mode according to the present invention. This is a schematic diagram of the explosion according to the present invention.

[0019] Figure 4 This is a structural schematic diagram of an axial flow fan of a drainage structure of a high-power window-type heating and cooling air conditioner described in the present invention.

[0020] Figure 5 This is a structural schematic diagram of a temperature-controlled drain valve of a drainage structure of a high-power window-type heating and cooling air conditioner described in the present invention.

[0021] Figure 6 This is a schematic diagram of the arrangement of heat exchange tubes of an outdoor heat exchanger of a high-power cooling and heating air conditioner described in the present invention.

[0022] Figure 7 This is a working principle diagram of a high-power cooling and heating air conditioner described in the present invention.

[0023] Figure 8 It is a schematic diagram of the end structure of the outdoor heat exchanger of the present invention.

[0024] Fig. 9 It is a schematic diagram of the internal structure of the present invention.

[0025] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0026] 1 chassis, 2 indoor cavity, 3 outdoor cavity, 4 crossflow impeller, 5 indoor heat exchanger, 6 electric heater, 7 air outlet, 8 axial flow fan, 9 compressor, 10 outdoor heat exchanger, 11 second bottom plate, 13 platform, 14 water tray, 15 first bottom plate, 16 partition, 17 second drain pipe, 18 first drain pipe, 19 temperature control drain valve, 20 elastic airbag, 21 valve stem, 22 plug block, 23 fan blade, 24 outer ring, 25 water block, 4 crossflow impeller, 5 Indoor heat exchanger, 8 axial flow fan, 9 compressor, 10 outdoor heat exchanger, 26 four-way valve, 27 throttling capillary, 28 main electronic expansion valve, 29 flash evaporator, 30 one-way solenoid valve, 31 first branch, 32 second branch, 33 third branch, 34 fourth branch, 35 liquid / gas inlet pipeline, 36 liquid / gas outlet pipeline, 37 compressor outlet, 38 compressor return air port, 39 compressor enthalpy increase port, refrigeration power supply, heating power supply, 42 U-shaped tube. DETAILED DESCRIPTION

[0027] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0028] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0029] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] See also Figure 1-5 The present invention discloses a high-power window-type air conditioner, comprising a chassis 1, which is divided into an indoor chamber 2 and an outdoor chamber 3; a cross-flow fan 4, an indoor heat exchanger 5, and an electric heater 6 are arranged in the indoor chamber 2, and an air outlet 7 is opened at the top of the indoor chamber 2. An axial fan 8, a compressor 9, and an outdoor heat exchanger 10 are arranged in the outdoor chamber 3, the outdoor chamber 3 includes a second bottom plate 11, and the compressor 9 is specifically a 4.5-6.8kW high-power variable frequency compressor.

[0033] The second bottom plate 11 of the outdoor chamber 3 protrudes upward to form a platform 13, and the edge of the platform 13 and the side wall of the outdoor chamber form a water receiving tray 14, and a heating film is attached to the bottom of the water receiving tray 14. The indoor chamber 2 includes a first bottom plate 15, and the horizontal position of the first bottom plate 15 is higher than the platform 13. The indoor chamber 2 and the outdoor chamber 3 are separated by a partition 16, and a second drain pipe 17 is led out from the bottom of the indoor chamber 2 and passes through the partition 16 to the outdoor chamber 3. The water receiving tray 14 of the outdoor chamber 3 is connected to the first drain pipe 18 through a drainage channel. The first drain pipe 18 is located on the indoor side. The water receiving tray 14 and the drainage channel form an L-shaped groove outside the platform 13. A temperature-controlled drain valve 19 is provided at the junction of the first drain pipe 18 and the water receiving tray 14. An elastic air bag 20 is arranged in the temperature-controlled drain valve 19. The elastic air bag 20 is connected to the valve stem 21, and the valve stem 21 is connected to the plug 22.

[0034] The axial flow fan 8 is installed vertically and includes blades 23 and an outer ring 24, which are connected by a water block 25. The axial flow fan 8 is an integrally formed structure, and the bottom of the outer ring 24 is close to the platform 13 and is 1m away from the surface of the platform 13.

[0035] Specifically, when the ambient temperature is high and the air conditioner is working in the cooling mode, the indoor heat exchanger 5 absorbs heat from the surroundings and generates condensed water on the surface. The condensed water flows to the first bottom plate 15 of the indoor chassis 2. When the condensed water on the first bottom plate 15 accumulates to a certain amount, it flows into the second drain pipe 17, enters the outdoor chamber 3 along the pipe, and flows to the platform 13. Since the ambient temperature is high at this time, and the elastic airbag 20 in the temperature-controlled drain valve 19 has the characteristics of thermal expansion and contraction, the elastic airbag 20 expands, causing the valve stem 21 and the plug 22 to press down, blocking the hole of the first drain pipe 18, so that the condensed water cannot be discharged through the first drain pipe 18 and accumulates on the second bottom plate 11. When the condensed water accumulates to a certain amount, the liquid surface contacts the outer ring 24 of the axial fan 8 and the water block 25. Since the axial fan 8 is rotating at a high speed when the air conditioner is working, the water block 25 is driven to rotate around the central axis of the fan. The water block 25 continuously collides with the condensed water, and the condensed water is thrown to the outdoor heat exchanger 10 by the water block 25, and evaporates by heat, thereby completing the drainage process. When the ambient temperature is low and the air conditioner is working in the heating mode, the outdoor heat exchanger 10 absorbs heat from the surroundings, and condensed water is generated on the surface. The condensed water flows to the second bottom plate 11 of the outdoor chassis 3 and gathers in the water receiving tray 14. Since the ambient temperature is low at this time, the elastic airbag 20 in the temperature-controlled drain valve 19 shrinks, causing the valve stem 21 and the plug 22 to move upward, exposing the hole of the first drain pipe 18, so that the condensed water is discharged into the room through the first drain pipe 18, completing the drainage process. Since the water receiving pan 14 and / or the bottom surface of the drainage channel are affixed with a heating film, the condensed water of the outdoor heat exchanger is led to the indoor discharge through the L-shaped groove, and the condensed water will not freeze into ice cubes.

[0036] Reference Figure 6-Figure 9 The refrigeration system components of the high-power air conditioner include a cross-flow impeller 4, an axial fan 8, a compressor 9, a four-way valve 26, an indoor heat exchanger 5, an outdoor heat exchanger 10, a throttling capillary 27, a main electronic expansion valve 28, a flash evaporator 29 and a one-way solenoid valve 30. The outdoor heat exchanger 10 includes fins and a heat exchange tube group, and the heat exchange tube group includes a first branch 31, a second branch 32, a third branch 33, and a fourth branch 34; each branch includes a plurality of heat exchange tubes, and the heat exchange tubes are connected at the ends by U-shaped tubes 42.

[0037] The heat exchange tubes of the first branch 31 are arranged at the upper part of the outdoor heat exchanger 10, the heat exchange tubes of the second branch 32 are arranged at the middle part of the outdoor heat exchanger 10 close to the axial flow fan 8, the heat exchange tubes of the third branch 33 are arranged at the middle part of the outdoor heat exchanger 10 away from the axial flow fan 8, and the heat exchange tubes of the fourth branch 34 are arranged at the lower part of the outdoor heat exchanger 10; the outdoor heat exchanger 10 includes a liquid / gas inlet pipe 35 and a liquid / gas outlet pipe 36, the liquid / gas inlet pipe 35 is divided into four small pipes respectively connected to the inlets of the four branch pipes of the heat exchange pipe group, and the liquid / gas outlet pipe 36 is divided into four small pipes respectively connected to the outlets of the four branch pipes of the heat exchange pipe group; the total length of the heat exchange tubes of the first branch 31 and the total length of the heat exchange tubes of the fourth branch 34 are both greater than the total length of the heat exchange tubes of the second branch 32 and the total length of the heat exchange tubes of the third branch 33. In this embodiment, the number of heat exchange tubes in the first branch 31 and the fourth branch 34 is 12, and the number of heat exchange tubes in the second branch 32 and the third branch 33 is 10.

[0038] In the air conditioning heating mode, the outdoor heat exchanger 10 acts as an evaporator, the refrigerant absorbs heat, and the heat exchange tube exchanges heat with the airflow blown out by the axial flow fan 8. Since the central wind speed of the axial flow fan 8 is high and the edge wind speed is low, the traditional heat exchanger is prone to uneven temperature distribution, and ice blockage is prone to occur at the edge of the heat exchanger in a cold environment. In this embodiment, the upper and lower branches of the outdoor heat exchanger 10 use more heat exchange tubes, which increases the branch heat exchange area, thereby improving the heat exchange efficiency of the upper and lower branches, making the temperature distribution of the outdoor heat exchanger 10 more uniform and reducing the possibility of ice blockage. In the second branch 32 and the third branch 33, based on the fact that the third branch 33 is closer to the central axis of the fan than the second branch 32 and has a higher wind speed, the third branch 33 arranges more pipe sections on the outside, that is, away from the fan blades, while the second branch 32 arranges relatively more pipe sections on the inside, so that the heat exchange efficiency of the second branch 32 and the third branch 33 is roughly the same.

[0039] The four-way valve 26 includes ports A, B, C, and D, wherein port A is connected to the air outlet 37 of the compressor 9, port B is connected to the outdoor heat exchanger 10, port C is connected to the compressor return port 38, and port D is connected to the indoor heat exchanger 5; the flash evaporator 29 includes ports E, F, and G, wherein port E is connected to the throttling capillary 27, port F is connected to the one-way solenoid valve 30, and port G is connected to the compressor enthalpy increase port 39. The one-way solenoid valve 30 is controlled by the main control chip, closed in the air conditioning cooling mode, and opened in the heating mode. The air conditioning cooling mode uses the cooling power input, and the heating mode uses the heating power input, and the power input switching is realized by a relay.

[0040] Specifically, when the air conditioner is in cooling mode, the cooling power input is used, the one-way solenoid valve 30 is closed, the A and B ports of the four-way valve 26 are connected, and the C and D ports are connected; the refrigerant is compressed by the compressor 9 into a high-temperature and high-pressure gas, discharged from the air outlet 37, passes through the AB section of the four-way valve 26, passes through the outdoor heat exchanger 10, releases heat, and condenses to form a high-temperature and high-pressure liquid; the high-temperature and high-pressure liquid is initially depressurized through the throttling capillary 27, passes through the flash evaporator 29, and then passes through the main electronic expansion valve 28 to become a low-temperature and low-pressure gas-liquid mixture, the gas-liquid mixture passes through the indoor heat exchanger 5, absorbs heat, evaporates into gas, and passes through the DC section of the four-way valve 26 to return to the return air port 38 of the compressor 9 to complete the cycle.

[0041] When the air conditioner is in the heating mode, the heating power input is used, the one-way solenoid valve 30 is opened, the A and D ports of the four-way valve 26 are connected, and the B and C ports are connected; the refrigerant is compressed by the compressor 9 into a high-temperature and high-pressure gas, discharged from the gas outlet 37, passes through the AD section of the four-way valve 26, passes through the indoor heat exchanger 5, releases heat, and condenses to form a high-temperature and high-pressure liquid; the high-temperature and high-pressure liquid is initially reduced in pressure through the main electronic expansion valve 28 and enters the flash evaporator 29, and the main circuit and the auxiliary circuit are separated from the flash evaporator 29. The liquid-phase refrigerant starts from the E port of the flash evaporator 29, enters the throttling capillary 27 through the main circuit, and becomes a low-temperature and low-pressure gas-liquid mixture. The gas-liquid mixture passes through the indoor heat exchanger 5, absorbs heat, evaporates into gas, and returns to the return port 38 of the compressor 9 through the DC section of the four-way valve 26 to complete the cycle; the gas-phase refrigerant starts from the F port of the flash evaporator 29, passes through the one-way solenoid valve 30 through the auxiliary circuit, and enters the enthalpy increase port 39 of the compressor 9 to complete the cycle.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-power cooling and heating air conditioner, comprising a chassis and a refrigeration system, wherein the refrigeration system comprises a crossflow impeller, an axial flow fan, a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a throttling capillary, a main electronic expansion valve, a flash evaporator and a one-way solenoid valve; the chassis comprises an indoor cavity and an outdoor cavity, and the indoor cavity and the outdoor cavity are separated by a partition; the crossflow impeller and the indoor heat exchanger are arranged in the indoor cavity; the axial flow fan, the compressor and the outdoor heat exchanger are arranged in the outdoor cavity; the characteristic is that, The outdoor heat exchanger includes fins and a heat exchange tube group, and the heat exchange tube group includes a first branch, a second branch, a third branch, and a fourth branch; the heat exchange tubes of the first branch are arranged at the upper part of the outdoor heat exchanger, the heat exchange tubes of the second branch are arranged at the middle part of the outdoor heat exchanger close to the axial flow fan side, the heat exchange tubes of the third branch are arranged at the middle part of the outdoor heat exchanger away from the axial flow fan side, and the heat exchange tubes of the fourth branch are arranged at the lower part of the outdoor heat exchanger; the total length of the heat exchange tubes of the first branch and the total length of the heat exchange tubes of the fourth branch are both greater than the total length of the heat exchange tubes of the second branch and the total length of the heat exchange tubes of the third branch; A water receiving pan is arranged below the outdoor heat exchanger, and the water receiving pan is connected to a first drain pipe through a drainage channel. The first drain pipe is located on the indoor side, and a drain valve is arranged between the first drain pipe and the water receiving pan.

2. A high-power cooling and heating air conditioner according to claim 1, characterized in that: The indoor cavity comprises a first bottom plate, a second drainage pipe is led out from the bottom of the indoor cavity, passes through a partition plate and is directed to the outdoor cavity; the axial flow fan comprises blades and an outer ring, and the blades and the outer ring are connected via a water block.

3. A high-power cooling and heating air conditioner according to claim 1, characterized in that: The outdoor cavity comprises a second bottom plate, the second bottom plate protrudes upward to form a platform, and the water receiving tray is surrounded by the edge of the platform and the side wall of the outdoor cavity.

4. A high-power cooling and heating air conditioner according to claim 1, characterized in that: An elastic airbag is arranged inside the temperature-controlled drain valve, the elastic airbag is connected to a valve stem, and the valve stem is connected to a plug block.

5. A high-power cooling and heating air conditioner according to any one of claims 1 to 4, characterized in that: The indoor cavity also includes an electric heater; the compressor is a 4.5-6.8kW high-power variable-frequency compressor.

6. A high-power cooling and heating air conditioner according to claim 1, characterized in that: The one-way solenoid valve is controlled by the main control chip, closed in the air conditioning cooling mode and opened in the heating mode; the four-way valve includes ports A, B, C and D, the A port is connected to the compressor outlet, the B port is connected to the outdoor heat exchanger, the C port is connected to the compressor return port, and the D port is connected to the indoor heat exchanger; the flash evaporator includes ports E, F and G, the E port is connected to the throttling capillary, the F port is connected to the one-way solenoid valve, and the G port is connected to the compressor enthalpy increase port.

7. A high-power cooling and heating air conditioner according to claim 1, characterized in that: The bottom surface of the water receiving tray and / or the drainage channel is affixed with a heating film. The air conditioning cooling mode and the heating mode use different power inputs, and the power input switching is achieved through a relay.

8. A high-power cooling and heating air conditioner according to claim 1, characterized in that: Each branch of the heat exchange tube group includes several heat exchange tubes, and the heat exchange tubes are connected at the ends by U-shaped tubes; the outdoor heat exchanger includes a liquid / gas inlet pipe and a liquid / gas outlet pipe, the liquid / gas inlet pipe is divided into four small tubes respectively connected to the inlets of the four branch pipes of the heat exchange tube group, and the liquid / gas outlet pipe is divided into four small tubes respectively connected to the outlets of the four branch pipes of the heat exchange tube group.

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