An air conditioning system, a vehicle and a method for operating an air conditioning system

Abstract

The application relates to the air conditioning technical field, in particular to an air conditioning system, a vehicle and an operation method of the air conditioning system, wherein the air conditioning system comprises a compressor, a pipeline switching component, an outdoor heat exchanger and a throttling device which are sequentially connected in series, the air conditioning system further comprises a first indoor heat exchanger, a second indoor heat exchanger and a valve mechanism; the first indoor heat exchanger and the second indoor heat exchanger are both arranged in parallel between the throttling device and the pipeline switching component; the valve mechanism is used for selectively opening the pipeline of one of the first indoor heat exchanger and the second indoor heat exchanger or opening the pipelines of the first indoor heat exchanger and the second indoor heat exchanger according to the size of indoor load. According to the technical scheme of the application, the first indoor heat exchanger and the second indoor heat exchanger can be independently operated or simultaneously operated according to the size of indoor load, so that the adaptability is better, and the use experience of users can be improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an air conditioning system, a vehicle, and a method for operating the air conditioning system. Background Technology

[0002] Automotive air conditioning is an important air conditioning device in the car cabin, and its temperature regulation efficiency and air quality directly affect the air conditions inside the cabin. Currently, most automotive air conditioning units are equipped with dual heat exchangers, with separate heat exchangers for cooling and heating, resulting in one heat exchanger always being idle.

[0003] Existing technologies disclose solutions for air conditioners to operate dual indoor heat exchangers simultaneously during heating or cooling. However, automotive air conditioners cannot adjust the number of operating heat exchangers based on the indoor load, resulting in a poor user experience. Furthermore, the airflow within the air conditioning unit must pass through two heat exchangers before reaching the outside, increasing airflow resistance and reducing air volume. Additionally, prolonged use inevitably leads to dirt and clogging on the heat exchanger surfaces, but the air conditioning unit is typically located under the dashboard, making disassembly and cleaning extremely complex. Therefore, these problems need to be addressed. Summary of the Invention

[0004] In view of this, the present invention provides an air conditioning system, a vehicle, and a method for operating the air conditioning system. The main technical problem to be solved is: how to adjust the number of heat exchangers to be turned on according to the indoor load.

[0005] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0006] In a first aspect, embodiments of the present invention provide an air conditioning system comprising a compressor, a pipeline switching component, an outdoor heat exchanger, and a throttling device connected in series, and the air conditioning system further comprising a first indoor heat exchanger, a second indoor heat exchanger, and a valve mechanism.

[0007] The first indoor heat exchanger and the second indoor heat exchanger are connected in parallel between the throttling device and the pipeline switching component.

[0008] The valve mechanism is used to selectively open the piping of either the first indoor heat exchanger or the second indoor heat exchanger, or to open the piping of both the first indoor heat exchanger and the second indoor heat exchanger, depending on the size of the indoor load.

[0009] In some implementations, the air conditioning system further includes a temperature sensor for detecting the indoor temperature;

[0010] When the pipeline switching component controls the air conditioning system to cool, if the indoor temperature is greater than or equal to the first cooling set temperature, the valve mechanism controls the pipeline of one of the first indoor heat exchanger and the second indoor heat exchanger to open; if the indoor temperature is greater than or equal to the second cooling set temperature, the valve mechanism controls the pipeline of both the first indoor heat exchanger and the second indoor heat exchanger to open; wherein the second cooling set temperature is greater than the first cooling set temperature.

[0011] And / or, when the pipeline switching component controls the air conditioning system to heat, if the indoor temperature is less than or equal to the first heating set temperature, the valve mechanism controls the pipeline of one of the first indoor heat exchanger and the second indoor heat exchanger to open; if the indoor temperature is less than or equal to the second heating set temperature, the valve mechanism controls the pipeline of both the first indoor heat exchanger and the second indoor heat exchanger to open; wherein, the second heating set temperature is less than the first heating set temperature.

[0012] In some embodiments, the air conditioning system further includes a return air duct, the return air duct having a first air outlet duct and a second air outlet duct;

[0013] The first indoor heat exchanger is installed in the first air outlet duct so that the airflow passing through the first indoor heat exchanger is discharged through the first air outlet duct; the second indoor heat exchanger is installed in the second air outlet duct so that the airflow passing through the second indoor heat exchanger is discharged through the second air outlet duct.

[0014] In some embodiments, the air conditioning system further includes a damper mechanism for controlling the opening and closing of the first air outlet channel and the second air outlet channel, respectively.

[0015] In some embodiments, the air conditioning system has heating and cooling modes. In the heating and cooling modes, the pipe switching component controls the air conditioning system to heat or cool. The damper mechanism is used to open only the air outlet channel corresponding to the opened pipe in the first air outlet channel and the second air outlet channel when the pipe of one of the first indoor heat exchangers and the second indoor heat exchanger is opened, and to open both the first air outlet channel and the second air outlet channel when the pipes of both the first indoor heat exchanger and the second indoor heat exchanger are opened.

[0016] In some embodiments, the air conditioning system further includes a heating channel for supplying heat to the room, and the damper mechanism is also used to control the opening or closing of the air outlet of the heating channel, and when the air outlet of the heating channel is opened, the air outlet of the heating channel is connected to the indoor return air inlet of the return air channel; and when the air outlet of the heating channel is closed, the connection between the air outlet of the heating channel and the indoor return air inlet of the return air channel is disconnected.

[0017] In some embodiments, the air conditioning system includes a pump body, a coil, and an auxiliary heat exchanger, which are connected in sequence to form a refrigerant circulation loop; the coil is fitted onto the compressor to allow the refrigerant in the coil to exchange heat with the compressor; the auxiliary heat exchanger is used to exchange heat with the airflow flowing through the heating channel, so that the heating channel supplies heat to the room through the airflow after heat exchange with the auxiliary heat exchanger;

[0018] Alternatively, the air conditioning system includes a heater for heating the airflow flowing through the heating channel, so that the heating channel supplies heat to the room through the airflow heated by the heater.

[0019] In some embodiments, the air conditioning system has a first indoor heat exchanger self-cleaning mode;

[0020] In the self-cleaning mode of the first indoor heat exchanger, the pipeline switching component controls the air conditioning system to cool, the valve mechanism controls the pipelines of both the first and second indoor heat exchangers to open, and the damper mechanism controls the second air outlet channel to open and controls the first air outlet channel to open after a set time of closure.

[0021] Alternatively, when the air conditioning system includes a heating channel, in the self-cleaning mode of the first indoor heat exchanger, the pipeline switching component controls the air conditioning system to heat, the valve mechanism controls the pipeline of the first indoor heat exchanger to open, and the pipeline of the second indoor heat exchanger to close; the damper mechanism controls both the heating channel and the second air outlet channel to open, and controls the first air outlet channel to open after a set time of closure.

[0022] In some embodiments, the first air outlet duct also has a first outdoor air outlet, in which the first indoor heat exchanger self-cleaning mode is used to discharge air through the first outdoor air outlet when it is opened after a set time of closure.

[0023] In some embodiments, the air conditioning system has a second indoor heat exchanger self-cleaning mode;

[0024] In the self-cleaning mode of the second indoor heat exchanger, the pipeline switching component controls the air conditioning system to cool, the valve mechanism controls the pipelines of both the first and second indoor heat exchangers to open, and the damper mechanism controls the first air outlet channel to open and controls the second air outlet channel to open after a set time of closure.

[0025] Alternatively, when the air conditioning system includes a heating channel, in the self-cleaning mode of the second indoor heat exchanger, the pipeline switching component controls the air conditioning system to heat, the valve mechanism controls the pipeline of the second indoor heat exchanger to open, and the pipeline of the first indoor heat exchanger to close; the damper mechanism controls both the heating channel and the first air outlet channel to open, and controls the second air outlet channel to open after a set time of closure.

[0026] In some embodiments, the second air outlet duct also has a second outdoor air outlet, in which the second air outlet duct is used to discharge air through the second outdoor air outlet when it is opened after a set closing time in the self-cleaning mode of the second indoor heat exchanger.

[0027] In some embodiments, the first air outlet duct has a first indoor air outlet, and the second air outlet duct has a second indoor air outlet;

[0028] The damper mechanism includes a first damper, which controls the opening and closing of both the first indoor air outlet and the second indoor air outlet.

[0029] In some embodiments, the air conditioning system includes an air conditioning unit, which includes a housing and a heat exchange fan disposed within the housing. The housing includes an air outlet duct shell, which has a first duct section and a second duct section connected in an L-shape. The first duct section has a first opening communicating with the interior of the air conditioning unit on the side near the heat exchange fan, and a first indoor heat exchanger is disposed at the first opening. The second duct section has a second opening communicating with the interior of the air conditioning unit on the side near the heat exchange fan, and a second indoor heat exchanger is disposed at the second opening.

[0030] The first air outlet channel includes the first shell section, through which air is discharged, and the opening of the first shell section near the second shell section serves as the first indoor air outlet; the second air outlet channel includes the second shell section, through which air is discharged, and the opening of the second shell section near the first shell section serves as the second indoor air outlet; a third indoor air outlet is provided at the connection point of the first shell section and the second shell section on the side away from the heat exchange fan, which communicates with both the first indoor air outlet and the second indoor air outlet.

[0031] One end of the first damper is hinged to the connection between the first and second shell sections near the heat exchange fan. The first damper is used to rotate to different positions to control the opening and closing of both the first indoor air outlet and the second indoor air outlet.

[0032] In some embodiments, when the air conditioning system includes a heating channel for supplying heat to the room, the damper mechanism is further used to control the opening or closing of the air outlet of the heating channel, and when the air outlet of the heating channel is opened, the air outlet of the heating channel is connected to the indoor return air inlet of the return air channel; and when the air outlet of the heating channel is closed, the connection between the air outlet of the heating channel and the indoor return air inlet of the return air channel is disconnected, the damper mechanism includes a second damper; wherein, the housing further includes a shell, one end of the shell is connected to the end of the first shell section opposite to the second shell section, the other end of the shell forms the indoor return air inlet between the second shell section and the end of the second shell section opposite to the first shell section, and a receiving cavity for installing the heat exchange fan is formed between the shell and the air outlet shell;

[0033] The air outlet of the heating channel has a first side and a second side. The first side is connected to one side of the indoor return air vent, and one end of the second damper is hinged to the second side. The second damper can be rotated to a first position and a second position. In the first position, the other end of the second damper cooperates with the other side of the indoor return air vent to open the air outlet of the heating channel and connect the air outlet of the heating channel to the indoor return air vent. In the second position, the other end of the second damper cooperates with the first side to close the air outlet of the heating channel and disconnect the air outlet of the heating channel from the indoor return air vent.

[0034] Secondly, embodiments of the present invention also provide a vehicle that may include any of the above-described air conditioning systems.

[0035] Thirdly, embodiments of the present invention also provide a method for operating any of the above-mentioned air conditioning systems, comprising:

[0036] Depending on the indoor load, one of the pipes of the first indoor heat exchanger and the second indoor heat exchanger may be opened, or both of the pipes of the first indoor heat exchanger and the second indoor heat exchanger may be opened.

[0037] In some embodiments, selectively opening the piping of one of the first and second indoor heat exchangers, or opening the piping of both the first and second indoor heat exchangers, based on the indoor load, specifically includes:

[0038] Detect the indoor temperature;

[0039] When the air conditioning system is cooling, if the indoor temperature is greater than or equal to the first cooling set temperature, the system controls the opening of the pipes of one of the first indoor heat exchangers and the second indoor heat exchanger; if the indoor temperature is greater than or equal to the second cooling set temperature, the system controls the opening of the pipes of both the first indoor heat exchangers and the second indoor heat exchanger; wherein, the second cooling set temperature is greater than the first cooling set temperature.

[0040] When the air conditioning system is in heating mode, if the indoor temperature is less than or equal to the first heating set temperature, the system controls the opening of the pipes of either the first indoor heat exchanger or the second indoor heat exchanger; if the indoor temperature is less than or equal to the second heating set temperature, the system controls the opening of the pipes of both the first indoor heat exchanger and the second indoor heat exchanger; wherein the second heating set temperature is less than the first heating set temperature.

[0041] In some embodiments, when the air conditioning system includes a return air duct, and the return air duct has a first air outlet duct and a second air outlet duct, the operating method includes:

[0042] When the air conditioning system is heating or cooling, if the pipe of either the first indoor heat exchanger or the second indoor heat exchanger is opened, only the air outlet passage in the first air outlet passage and the second air outlet passage corresponding to the opened pipe will be opened. If the pipes of both the first indoor heat exchanger and the second indoor heat exchanger are opened, both the first air outlet passage and the second air outlet passage will be opened.

[0043] In some embodiments, when the air conditioning system has a first indoor heat exchanger self-cleaning mode, the operating method further includes:

[0044] In the self-cleaning mode of the first indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of both the first and second indoor heat exchangers are controlled to open; the second air outlet duct is controlled to open, and the first air outlet duct is controlled to open after a set time of closure.

[0045] Alternatively, when the air conditioning system also includes a heating channel for supplying heat to the room, in the self-cleaning mode of the first indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of the first indoor heat exchanger are controlled to open and the pipes of the second indoor heat exchanger are controlled to close; both the heating channel and the second air outlet channel are controlled to open, and the first air outlet channel is controlled to open after a set time of closure.

[0046] In some embodiments, when the air conditioning system has a second indoor heat exchanger self-cleaning mode, the operating method further includes:

[0047] In the self-cleaning mode of the second indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of both the first and second indoor heat exchangers are controlled to open; the first air outlet duct is controlled to open, and the second air outlet duct is controlled to open after being closed for a set time.

[0048] Alternatively, when the air conditioning system also includes a heating channel for supplying heat to the room, in the self-cleaning mode of the second indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of the second indoor heat exchanger are controlled to open and the pipes of the first indoor heat exchanger are controlled to close; both the heating channel and the first air outlet channel are controlled to open, and the second air outlet channel is controlled to open after being closed for a set time.

[0049] By employing the above technical solutions, the air conditioning system, vehicle, and air conditioning system operation method of the present invention have at least the following beneficial effects:

[0050] 1. The valve mechanism can selectively operate the first or second indoor heat exchanger individually based on the indoor load to meet the low-load operating conditions of the air conditioning system. The valve mechanism can also operate the first and second indoor heat exchangers simultaneously to meet the high-load or heavy dehumidification load conditions of the air conditioning system. This allows for adjustment of the number of heat exchangers open based on the indoor load, improving the user experience.

[0051] 2. Since the first indoor heat exchanger and the second indoor heat exchanger are each equipped with independent air outlet channels, the air in the return air channel only needs to pass through a single layer of heat exchanger (either the first indoor heat exchanger or the second indoor heat exchanger) regardless of whether the air flows out from the first air outlet channel or the second air outlet channel, thus the air outlet resistance is relatively small.

[0052] 3. By setting up a damper mechanism to control the opening and closing of the first and second air outlet channels, different operating conditions of the air conditioning system can be met. For example, when a single heat exchanger is working, only the air outlet channel corresponding to that heat exchanger can be opened, which helps to improve heat exchange and air volume.

[0053] 4. During heating, it can recover heat from the compressor to increase heating capacity;

[0054] 5. It can achieve self-cleaning of the first and second indoor heat exchangers without affecting the normal cooling and heating needs of the room.

[0055] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the structure of an air conditioner provided in one embodiment of the present invention;

[0058] Figure 2 yes Figure 1Enlarged view of point A in the middle;

[0059] Figure 3 This is a schematic diagram of the air conditioning system's cooling operation according to the present invention;

[0060] Figure 4 This is a schematic diagram of the heating operation of the air conditioning system of the present invention;

[0061] Figure 5 This is a schematic diagram of the first stage of the self-cleaning operation of the air conditioning system of the present invention using high-temperature cooling;

[0062] Figure 6 This is a schematic diagram of the second stage of the self-cleaning operation of the air conditioning system of the present invention using high-temperature cooling;

[0063] Figure 7 This is a schematic diagram of the first stage of the self-cleaning operation of the air conditioning system of the present invention using low-temperature heating;

[0064] Figure 8 This is a schematic diagram of the second stage of the self-cleaning operation of the air conditioning system of the present invention using a low-temperature heating method.

[0065] Reference numerals: 1. Heat exchange fan; 2. Auxiliary heat exchanger; 3. First indoor heat exchanger; 4. Second indoor heat exchanger; 5. Second damper; 6. Second shaft; 7. Fourth damper; 8. Fourth shaft; 9. First damper; 10. First shaft; 11. Third damper; 12. Third shaft; 13. Air inlet of heating channel; 14. Air return outlet; 15. First outdoor air outlet; 16. Second outdoor air outlet; 17. Third indoor air outlet; 18. Compressor; 19. Coil; 20. Piping switching component; 21. Outdoor heat exchanger; 22. Outdoor fan; 23. Throttling device; 24. 25. First switch valve; 26. Second switch valve; 27. Third switch valve; 28. Fourth switch valve; 29. ​​Gas-liquid separator; 20. Pump body; 31. First indoor air outlet; 32. Second indoor air outlet; 33. First opening; 34. Second opening; 35. First shell section; 36. Second shell section; 37. First air outlet channel; 38. Second air outlet channel; 39. Heating channel; 40. Shell; 41. Receptacle; 51. Air outlet of heating channel; 511. First side; 512. Second side; 141. One side of indoor return air outlet; 142. The other side of indoor return air outlet. Detailed Implementation

[0066] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0067] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0068] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0069] like Figure 1 and Figure 3 As shown, an embodiment of the present invention provides an air conditioning system comprising a compressor 18, a pipeline switching component 20, an outdoor heat exchanger 21, and a throttling device 23 connected in series. The air conditioning system also includes a first indoor heat exchanger 3, a second indoor heat exchanger 4, and a valve mechanism. The first indoor heat exchanger 3 and the second indoor heat exchanger 4 are connected in parallel between the throttling device 23 and the pipeline switching component 20. In a specific application example, the pipeline switching component 20 can be a four-way valve, the throttling device 23 can be an electronic expansion valve, etc., and a gas-liquid separator 28 can also be provided between the suction port of the compressor 18 and the pipeline switching component 20.

[0070] The aforementioned valve mechanism is used to selectively open the piping of either the first indoor heat exchanger 3 or the second indoor heat exchanger 4, or to open the piping of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4, depending on the indoor load. Specifically, the valve mechanism can open the piping of the first indoor heat exchanger 3 and close the piping of the second indoor heat exchanger 4; or the valve mechanism can close the piping of the first indoor heat exchanger 3 and open the piping of the second indoor heat exchanger 4; or the valve mechanism can open the piping of the first indoor heat exchanger 3 and open the piping of the second indoor heat exchanger 4.

[0071] In the above example, the valve mechanism can selectively operate either the first indoor heat exchanger 3 or the second indoor heat exchanger 4 individually, depending on the indoor load, to meet the low-load operating conditions of the air conditioning system. Alternatively, the valve mechanism can operate the first indoor heat exchanger 3 and the second indoor heat exchanger 4 simultaneously to meet the high-load or heavy dehumidification load conditions of the air conditioning system. This allows for adjustment of the number of heat exchangers open based on the indoor load, improving the user experience.

[0072] In a specific application example, the air conditioning system also includes a temperature sensor for detecting the indoor temperature. When the piping switching component controls the air conditioning system to cool, if the indoor temperature is greater than or equal to the first cooling set temperature, the valve mechanism controls the opening of the piping of either the first indoor heat exchanger 3 or the second indoor heat exchanger 4. In this case, the required cooling load is relatively small, and opening only one indoor heat exchanger is sufficient. If the indoor temperature is greater than or equal to the second cooling set temperature, the valve mechanism controls the opening of the piping of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4. The second cooling set temperature is greater than the first cooling set temperature. In this case, the required cooling load is larger, and both indoor heat exchangers must be opened simultaneously to meet the demand.

[0073] When the piping switching component controls the air conditioning system for heating, if the indoor temperature is less than or equal to the first heating set temperature, the valve mechanism controls the opening of the piping of either the first indoor heat exchanger 3 or the second indoor heat exchanger 4. In this case, the required heating load is relatively small, and opening only one indoor heat exchanger is sufficient. If the indoor temperature is less than or equal to the second heating set temperature, the valve mechanism controls the opening of the piping of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4; where the second heating set temperature is lower than the first heating set temperature. In this case, the required heating load is larger, and both indoor heat exchangers must be opened simultaneously to meet the demand.

[0074] The aforementioned air conditioning system may also include a return air duct and a damper mechanism. For example... Figure 1 As shown, the return air duct has a first air outlet duct 37 and a second air outlet duct 38.

[0075] The aforementioned first indoor heat exchanger 3 is disposed in the first air outlet duct 37, allowing the airflow passing through the first indoor heat exchanger 3 to exit through the first air outlet duct 37. The aforementioned second indoor heat exchanger 4 is disposed in the second air outlet duct 38, allowing the airflow passing through the second indoor heat exchanger 4 to exit through the second air outlet duct 38. Preferably, the first indoor heat exchanger 3 is disposed within the first air outlet duct 37, and the second indoor heat exchanger 4 is disposed within the second air outlet duct 38.

[0076] In the above example, since the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are respectively set in two independent air outlet channels, the air in the return air channel only needs to pass through a single heat exchanger (the first indoor heat exchanger 3 or the second indoor heat exchanger 4) whether it flows out from the first air outlet channel 37 or the second air outlet channel 38, so the air outlet resistance is relatively small.

[0077] The aforementioned damper mechanism is used to control the opening and closing of the first air outlet channel 37 and the second air outlet channel 38, respectively. Specifically, the damper mechanism can control the opening and closing of the first air outlet channel 37, and the damper mechanism can also control the opening and closing of the second air outlet channel 38.

[0078] In the above example, by setting a damper mechanism to control the opening and closing of the first air outlet duct 37 and the second air outlet duct 38, different operating conditions of the air conditioning system can be met. For example, when a single heat exchanger is working, only the air outlet duct corresponding to that heat exchanger can be opened, which helps to improve heat exchange and air volume. For example, in self-cleaning mode, when the corresponding heat exchanger is working, the air outlet duct corresponding to that heat exchanger can be controlled to close, so that the heat exchanger can be frosted quickly.

[0079] like Figure 3 As shown, the valve mechanism may include a first switching valve 24 and a second switching valve 25. Both the first switching valve 24 and the second switching valve 25 are located on the piping of the first indoor heat exchanger 3, with the first switching valve 24 located on one side of the first indoor heat exchanger 3 and the second switching valve 25 located on the other side. The valve mechanism can control the opening and closing of the piping of the first indoor heat exchanger 3 through the first switching valve 24 and the second switching valve 25. Specifically, when both the first switching valve 24 and the second switching valve 25 are open, the piping of the first indoor heat exchanger 3 is opened; when both the first switching valve 24 and the second switching valve 25 are closed, the piping of the first indoor heat exchanger 3 is closed.

[0080] like Figure 3As shown, the valve mechanism may further include a third switching valve 26 and a fourth switching valve 27. Both the third switching valve 26 and the fourth switching valve 27 are located on the piping of the second indoor heat exchanger 4, with the third switching valve 26 located on one side of the second indoor heat exchanger 4 and the fourth switching valve 27 located on the other side. The valve mechanism can control the opening and closing of the piping of the second indoor heat exchanger 4 through the third switching valve 26 and the fourth switching valve 27. Specifically, when both the third switching valve 26 and the fourth switching valve 27 are open, the piping of the second indoor heat exchanger 4 is opened; when both the third switching valve 26 and the fourth switching valve 27 are closed, the piping of the second indoor heat exchanger 4 is closed.

[0081] It should be noted that, in order to facilitate the control of the opening and closing of each switching valve, preferably, the first switching valve 24, the second switching valve 25, the third switching valve 26 and the fourth switching valve 27 are all solenoid valves, and the valve mechanism may include a controller to control the opening and closing of each switching valve.

[0082] The air conditioning system of the present invention has heating and cooling modes. In these modes, a pipe switching component controls the air conditioning system to heat or cool. A damper mechanism is used to open only the air outlet channels corresponding to the opened pipes in the first air outlet channel 37 and the second air outlet channel 38 when the pipes of either the first indoor heat exchanger 3 or the second indoor heat exchanger 4 are opened, and to open both the first air outlet channel 37 and the second air outlet channel 38 when the pipes of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are open. Specifically, when the pipe of the first indoor heat exchanger 3 is open and the pipe of the second indoor heat exchanger 4 is closed, the first switching valve 24 and the second switching valve 25 are both open, and the third switching valve 26 and the fourth switching valve 27 are both closed. The damper mechanism controls the first air outlet channel 37 to open and the second air outlet channel 38 to close. When the piping of the first indoor heat exchanger 3 is closed and the piping of the second indoor heat exchanger 4 is open, both the first and second switching valves 24 and 25 are closed, and both the third and fourth switching valves 26 and 27 are open. The damper mechanism controls the first air outlet channel 37 to close and the second air outlet channel 38 to open. When both the piping of the first indoor heat exchanger 3 and the piping of the second indoor heat exchanger 4 are open, the first, second, third, and fourth switching valves 24, 25, 26, and 27 are open, and the damper mechanism controls the first and second air outlet channels 37 and 38 to open.

[0083] In the example above, when a single heat exchanger is operating, the damper mechanism only opens the air outlet channel corresponding to that heat exchanger. This helps to increase heat exchange and air volume, and reduces the loss of airflow from the other air outlet channel.

[0084] To facilitate understanding, the specific heating and cooling processes of an air conditioning system are described below. For example... Figure 3As shown, when the air conditioning system is in cooling mode, the refrigerant flow path of the air conditioning system of this invention is as follows: the refrigerant is transformed into a high-temperature, high-pressure gas by the compressor 18 and enters the outdoor heat exchanger 21. The heat is blown to the outside by the outdoor fan 22. When the load demand in the interior, such as the cockpit, is not high, the first switch valve 24 and the second switch valve 25 are closed, and the third switch valve 26 and the fourth switch valve 27 are open. The refrigerant flows to the second indoor heat exchanger 4 for evaporation and heat absorption through the throttling device 23, and then flows back to the compressor 18 through the gas-liquid separator 28 to form a cycle. When the load demand in the interior, such as the cockpit, is high or the initial load is large, the first switch valve 24, the second switch valve 25, the third switch valve 26, and the fourth switch valve 27 can all be controlled to be open. At this time, both the first indoor heat exchanger 3 and the second indoor heat exchanger 4 can evaporate and absorb heat, greatly increasing the heat exchange capacity, which is beneficial for rapid cooling of the cockpit. When the indoor temperature is not much different from the set temperature, the first switch valve 24 and the second switch valve 25 can be closed, or the third switch valve 26 and the fourth switch valve 27 can be closed, so that only the second indoor heat exchanger 4 or the first indoor heat exchanger 3 is in the refrigerant flow state.

[0085] When the air conditioning system is in heating mode, such as Figure 4 As shown, heating operation is achieved by reversing the pipeline switching component 20. The high-temperature, high-pressure refrigerant from the compressor 18 enters the first indoor heat exchanger 3, and then evaporates in the outdoor heat exchanger 21 after being throttled and depressurized by the throttling device 23. Finally, it flows back to the gas-liquid separator 28 and the compressor 18 to form a cycle. When only one heat exchanger is in operation, the first switching valve 24, the second switching valve 25, or the third switching valve 26 and the fourth switching valve 27 can be in the closed state.

[0086] like Figure 1 As shown, the aforementioned air conditioning system may further include a heating channel 39 for supplying heat to the room. The damper mechanism is also used to control the opening or closing of the air outlet 51 of the heating channel, connecting the air outlet 51 of the heating channel to the indoor return air inlet 14 of the return air channel when the air outlet 51 is open, and disconnecting the connection between the air outlet 51 of the heating channel and the indoor return air inlet 14 of the return air channel when the air outlet 51 of the heating channel is closed.

[0087] In the above example, when the heating channel 39 needs to supply heat to the room, the damper mechanism opens the heating channel 39, so that the air outlet 51 of the heating channel 39 is connected to the indoor return air outlet 14 of the return air channel. Thus, the heating channel 39 can use the heat exchange fan 1 in the air conditioning unit to draw air to drive the air flow in the heating channel 39. In this way, there is no need to set up an additional fan in the heating channel 39 to drive the air flow, which has the advantage of reducing costs.

[0088] It should be noted that the air inlet 13 of the heating channel 39 can be an indoor air inlet, so that the heating channel 39 can form part of the return air channel to improve the indoor heating efficiency.

[0089] In a specific application example, such as Figure 3 As shown, the aforementioned air conditioning system may include a pump body 29, a coil 19, and an auxiliary heat exchanger 2. The pump body 29 may be a liquid pump, etc. The pump body 29, coil 19, and auxiliary heat exchanger 2 are connected in sequence to form a refrigerant circulation loop. The coil 19 is fitted onto the compressor 18 so that the refrigerant in the coil 19 exchanges heat with the compressor 18. The auxiliary heat exchanger 2 is used to exchange heat with the airflow flowing through the heating channel 39, so that the heating channel 39 supplies heat to the room through the airflow after heat exchange with the auxiliary heat exchanger 2.

[0090] In the above example, coil 19 absorbs the heat dissipated by compressor 18 through its internal refrigerant. Then, pump 29 drives the refrigerant, after absorbing heat, to flow into auxiliary heat exchanger 2. The refrigerant, after absorbing heat, exchanges heat with the airflow in heating channel 39 through auxiliary heat exchanger 2, transferring the absorbed heat to the fluid in heating channel 39. Heating channel 39 can then use this heated fluid to supply heat to the room. The pump 29, coil 19, auxiliary heat exchanger 2, and heating channel 39 work together to recover heat from compressor 18 to provide auxiliary heating to the room, thereby increasing the heating capacity.

[0091] In another example, the aforementioned air conditioning system may include a heater, such as a PTC heater. The heater is used to heat the airflow flowing through the heating channel 39, so that the heating channel 39 supplies heat to the room through the airflow heated by the heater.

[0092] In the example above, the heater, in conjunction with the heating channel 39, can also assist in supplying heat to the room and increase the heating capacity.

[0093] The air conditioning system of the present invention also has a first indoor heat exchanger self-cleaning mode. In one example, in the first indoor heat exchanger self-cleaning mode, the pipe switching component 20 controls the air conditioning system cooling, such as... Figure 5 and Figure 6 The valve mechanism controls the opening of the pipelines of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4. For example, it controls the opening of the first switching valve 24, the second switching valve 25, the third switching valve 26, and the fourth switching valve 27, so that both the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are in operation. The damper mechanism controls the opening of the second air outlet channel 38 and controls the opening of the first air outlet channel 37 after it has been closed for a set time.

[0094] In the above example, the damper mechanism controls the second air outlet duct 38 to open, allowing airflow at the second indoor heat exchanger 4, enabling normal operation and ensuring the coolness of the air conditioner's output, with minimal impact on the user's normal cooling needs. Conversely, when the damper mechanism controls the first air outlet duct 37 to close, there is no airflow at the first indoor heat exchanger 3, causing rapid frost formation on its surface. Once the frost has completely formed on the surface of the first indoor heat exchanger 3, the damper mechanism controls the first air outlet duct 37 to open, allowing return air to flow through the first indoor heat exchanger 3. Because the return air temperature is relatively high, the frost absorbs heat and melts into water as it flows over the surface of the first indoor heat exchanger 3, washing away dust and cleaning the surface. The resulting water droplets or water vapor are discharged through the first air outlet duct 37.

[0095] To improve defrosting efficiency, the valve mechanism is also used to close the pipeline of the first indoor heat exchanger 3 when the first air outlet channel 37 is opened after a set time of closure, so that the first indoor heat exchanger 3 stops cooling.

[0096] In another implementation, such as Figure 7 and Figure 8 As shown, when the air conditioning system includes the heating channel 39, in the self-cleaning mode of the first indoor heat exchanger, the pipe switching component 20 controls the air conditioning system to cool, and the valve mechanism controls the opening of the pipes of the first indoor heat exchanger 3 and the closing of the pipes of the second indoor heat exchanger 4. For example, it controls both the first and second switching valves 24 and 25 to open, and both the third and fourth switching valves 26 and 27 to close, so that refrigerant flows through the first indoor heat exchanger 3 and no refrigerant flows through the second indoor heat exchanger 4. The damper mechanism controls both the heating channel 39 and the second air outlet channel 38 to open, and controls the first air outlet channel 37 to open after a set time of closure.

[0097] In the above example, since both the heating channel 39 and the second air outlet channel 38 are open, the heating channel 39 can supply heat to the room through the second air outlet channel 38, so as not to affect the user's normal heating needs. When the damper mechanism controls the first air outlet channel 37 to close, there is no airflow at the first indoor heat exchanger 3, causing poor heat exchange of the refrigerant in the first indoor heat exchanger 3, resulting in frost formation on the surface of the first indoor heat exchanger 3. After the frost on the surface of the first indoor heat exchanger 3 is completed, the damper mechanism controls the first air outlet channel 37 to open, allowing return air to flow through the first indoor heat exchanger 3. Since the return air temperature is relatively high, when the high-temperature return air flows over the surface of the first indoor heat exchanger 3, the frost layer absorbs heat and melts into water, washing away the dust on the surface of the first indoor heat exchanger 3 for cleaning. The resulting water droplets or water vapor are discharged through the return air via the first air outlet channel 37.

[0098] It should be noted here that: in order to improve defrosting efficiency, such as Figure 8As shown, the pipeline switching component 20 is also used to switch the air conditioning system to heating when the first air outlet duct 37 is opened after a set time of closure, so that the first indoor heat exchanger 3 operates in heating mode. Due to the dual effects of the internal refrigerant and the heated air in the external heating channel 39, the defrosting and surface drying efficiency of the first indoor heat exchanger 3 is higher.

[0099] It should be noted that, in order to meet the indoor heating demand and improve the indoor heating effect, the valve mechanism is also used to control the opening of the pipeline of the second indoor heat exchanger 4 when the pipeline switching component 20 switches the air conditioning system from cooling to heating. For example, it controls the opening of both the third switch valve 26 and the fourth switch valve 27 so that the second indoor heat exchanger 4 also participates in heating.

[0100] To prevent the return air from bringing defrosting water droplets and dust from the surface of the first indoor heat exchanger 3 into the room, preferably, such as Figure 6 and Figure 8 As shown, the first air outlet duct 37 also has a first outdoor air outlet 15. In the self-cleaning mode of the first indoor heat exchanger, the first air outlet duct 37 is used to open after a set closing time to discharge air through the first outdoor air outlet 15, so that the air will expel the defrosting water droplets and dust on the surface of the first indoor heat exchanger 3 to the outside. In order to prevent more heat from being lost from the first outdoor air outlet 15, the first outdoor air outlet 15 needs to be gradually closed as the defrosting process proceeds, so as to ensure that more heat is blown into the room through the indoor air outlet of the first air outlet duct 37.

[0101] The air conditioning system of the present invention also has a second indoor heat exchanger self-cleaning mode. In one example, such as Figure 5 and Figure 6 As shown, in the self-cleaning mode of the second indoor heat exchanger, the pipeline switching component 20 controls the air conditioning system's cooling, and the valve mechanism controls the opening of the pipelines of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4. For example, it controls the opening of the first switching valve 24, the second switching valve 25, the third switching valve 26, and the fourth switching valve 27, so that both the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are operating. The damper mechanism controls the opening of the first air outlet channel 37 and controls the opening of the second air outlet channel 38 after a set closing time.

[0102] In the above example, the damper mechanism controls the opening of the first air outlet duct 37, allowing airflow at the first indoor heat exchanger 3, enabling normal operation and ensuring the coolness of the air conditioner's output, with minimal impact on the user's normal cooling needs. When the damper mechanism controls the closing of the second air outlet duct 38, no airflow occurs at the second indoor heat exchanger 4, causing rapid frost formation on its surface. Once the frost has completely formed on the surface of the second indoor heat exchanger 4, the damper mechanism controls the opening of the second air outlet duct 38, allowing return air to flow through the second indoor heat exchanger 4. Because the return air temperature is relatively high, the frost absorbs heat and melts into water as it flows over the surface of the second indoor heat exchanger 4, washing away dust and cleaning the surface. The resulting water droplets or water vapor are discharged through the second air outlet duct 38.

[0103] To improve defrosting efficiency, the valve mechanism is also used to close the pipeline of the second indoor heat exchanger 4 when the second air outlet channel 38 is opened after a set time of closure, so that the second indoor heat exchanger 4 stops cooling.

[0104] In another implementation, such as Figure 7 and Figure 8 As shown, when the air conditioning system includes the heating channel 39, in the self-cleaning mode of the second indoor heat exchanger, the pipe switching component 20 controls the air conditioning system to cool, and the valve mechanism controls the opening of the pipes of the second indoor heat exchanger 4 and the closing of the pipes of the first indoor heat exchanger 3. For example, it controls the first switching valve 24 and the second switching valve 25 to be closed, and the third switching valve 26 and the fourth switching valve 27 to be open, so that refrigerant flows through the second indoor heat exchanger 4 and no refrigerant flows through the first indoor heat exchanger 3. The damper mechanism controls the opening of both the heating channel 39 and the first air outlet channel 37, and controls the second air outlet channel 38 to be closed for a set time before opening.

[0105] In the above example, since both the heating channel 39 and the first air outlet channel 37 are open, the heating channel 39 can supply heat to the room through the first air outlet channel 37 without affecting the user's normal heating needs. However, when the damper mechanism closes the second air outlet channel 38, there is no airflow at the second indoor heat exchanger 4, causing poor heat exchange of the refrigerant within the second indoor heat exchanger 4, resulting in frost formation on the surface of the second indoor heat exchanger 4. Once the frost on the surface of the second indoor heat exchanger 4 is complete, the damper mechanism opens the second air outlet channel 38, allowing return air to flow through the second indoor heat exchanger 4. Because the return air temperature is relatively high, when the warmer return air flows over the surface of the second indoor heat exchanger 4, the frost absorbs heat and melts into water, washing away the dust on the surface of the second indoor heat exchanger 4 for cleaning. The resulting water droplets or water vapor are discharged through the second air outlet channel 38 from the return air.

[0106] It should be noted here that: in order to improve defrosting efficiency, such as Figure 8As shown, the pipeline switching component 20 is also used to switch the air conditioning system to heating when the second air outlet duct 38 is opened after a set time of closure, so that the second indoor heat exchanger 4 can operate in heating mode. Due to the dual effect of the internal refrigerant and the heated air in the external heating channel 39, the defrosting and surface drying efficiency of the second indoor heat exchanger 4 is higher.

[0107] It should be noted that, in order to meet the indoor heating demand and improve the indoor heating effect, the valve mechanism is also used to control the opening of the pipeline of the first indoor heat exchanger 3 when the pipeline switching component 20 switches the air conditioning system from cooling to heating, so that the first indoor heat exchanger 3 also participates in heating.

[0108] To prevent the return air from bringing defrosting water droplets and dust from the surface of the second indoor heat exchanger 4 into the room, preferably, such as Figure 6 and Figure 8 As shown, the second air outlet duct 38 also has a second outdoor air outlet 16. In the self-cleaning mode of the second indoor heat exchanger, the second air outlet duct 38 is used to open after a set closing time to discharge air through the second outdoor air outlet 16, so that the air will expel the defrosting water droplets and the dust on the surface of the second indoor heat exchanger 4 to the outside. In order to prevent more heat from being lost from the second outdoor air outlet 16, the second outdoor air outlet 16 needs to be gradually closed as the defrosting process proceeds, so as to ensure that more heat is blown into the room through the indoor air outlet of the second air outlet duct 38.

[0109] like Figure 1 As shown, the aforementioned first air outlet duct 37 has a first indoor air outlet 30, and the second air outlet duct 38 has a second indoor air outlet 31. The damper mechanism includes a first damper 9, which controls the opening and closing of both the first indoor air outlet 30 and the second indoor air outlet 31.

[0110] In the example above, the opening and closing of both indoor air outlets can be controlled by only one first damper 9, which can save the number of dampers and reduce costs.

[0111] In a specific application example, such as Figure 1 As shown, the air conditioning system of the present invention includes an air conditioning unit, which includes a housing and a heat exchange fan 1 disposed within the housing. The housing includes an air outlet duct shell, which has a first duct section 35 and a second duct section 36 connected in an L-shape. The first duct section 35 has a first opening 32 communicating with the interior of the air conditioning unit on the side near the heat exchange fan 1. A first indoor heat exchanger 3 is disposed at the first opening 32. The second duct section 36 may have a second opening 33 communicating with the interior of the air conditioning unit on the side near the heat exchange fan 1, and a second indoor heat exchanger 4 is disposed at the second opening 33.

[0112] The first air outlet duct 37 includes the aforementioned first shell section 35, through which air is discharged. The opening of the first shell section 35 near the second shell section 36 serves as the aforementioned first indoor air outlet 30. The second air outlet duct 38 includes the aforementioned second shell section 36, through which air is discharged. The opening of the second shell section 36 near the first shell section 35 serves as the aforementioned second indoor air outlet 31. A third indoor air outlet 17, communicating with both the first indoor air outlet 30 and the second indoor air outlet 31, is provided at the connection point between the first shell section 35 and the second shell section 36 on the side furthest from the heat exchanger 1.

[0113] One end of the first damper 9 is hinged to the connection between the first shell section 35 and the second shell section 36 on the side near the heat exchange fan 1. The first damper 9 is used to rotate to different positions to control the opening and closing of both the first indoor air outlet 30 and the second indoor air outlet 31.

[0114] In the above example, by respectively arranging the first indoor heat exchanger 3 and the second indoor heat exchanger 4 in the first shell section 35 and the second shell section 36, the first indoor heat exchanger 3 and the second indoor heat exchanger 4 can be arranged in an L-shape. Furthermore, by utilizing the L-shaped structural feature of the first shell section 35 and the second shell section 36, the aforementioned first indoor air outlet 30 and second indoor air outlet 31 can be formed at the connection between the first shell section 35 and the second shell section 36. And by providing a third indoor air outlet 17 at the connection between the first shell section 35 and the second shell section 36 on the side away from the heat exchange fan 1, both the first indoor air outlet 30 and the second indoor air outlet 31 can communicate with the interior through the third indoor air outlet 17. Moreover, by hinged the first damper 9 at the connection between the first shell section 35 and the second shell section 36 on the side closer to the heat exchange fan 1, the opening and closing of both the first damper 9 and the second damper 5 can be controlled. Specifically, the first damper 9 can open only the first indoor air outlet 30, connecting the first air outlet 37 to the interior. The first damper 9 can also open only the second indoor air outlet 31, connecting the second air outlet 38 to the interior. Alternatively, the first damper 9 can simultaneously open both the first indoor air outlet 30 and the second indoor air outlet 31, connecting both the first air outlet 37 and the second air outlet 38 to the interior.

[0115] like Figure 1As shown, when the air conditioning system includes a heating channel 39 for supplying heat to the room, and the damper mechanism is also used to control the opening or closing of the air outlet 51 of the heating channel, and when the air outlet 51 of the heating channel is opened, the air outlet 51 of the heating channel is connected to the indoor return air outlet 14 of the return air channel; and when the air outlet 51 of the heating channel is closed, the connection between the air outlet 51 of the heating channel and the indoor return air outlet 14 of the return air channel is disconnected, the damper mechanism may include a second damper 5. The housing may also include a shell 40, one end of which is connected to the end of the first shell section 35 opposite to the second shell section 36, and the other end of the shell 40 forms the aforementioned indoor return air outlet 14 between the end of the second shell section 36 opposite to the first shell section 35. A receiving cavity 41 for installing the heat exchange fan 1 is formed between the shell 40 and the air outlet shell.

[0116] like Figure 2 As shown, the air outlet 51 of the aforementioned heating channel has a first side 511 and a second side 512 facing each other. The first side 511 is connected to one side 141 of the indoor return air vent 14, and one end of the second damper 5 is hinged to the second side 512. The second damper 5 can rotate to a first position and a second position. In the first position, the other end of the second damper 5 engages with the other side 142 of the indoor return air vent 14 to open the air outlet 51 of the heating channel, connecting the air outlet 51 of the heating channel to the indoor return air vent 14. In the second position, the other end of the second damper 5 engages with the first side 511 to close the air outlet 51 of the heating channel, disconnecting the connection between the air outlet 51 of the heating channel and the indoor return air vent 14.

[0117] In the above example, the second damper 5 cooperates with the air outlet 51 of the heating channel and the indoor return air outlet 14 to realize the function of the damper mechanism, so that the damper mechanism can control the opening or closing of the air outlet 51 of the heating channel, and when the air outlet 51 of the heating channel is opened, the air outlet 51 of the heating channel is connected to the indoor return air outlet 14 of the return air channel; and when the air outlet 51 of the heating channel is closed, the connection between the air outlet 51 of the heating channel and the indoor return air outlet 14 of the return air channel is disconnected.

[0118] It should be noted that the first outdoor air outlet 15 can be located on the side of the first casing section 35 opposite to the second casing section 36. The damper mechanism includes a third damper 11, which controls the opening and closing of the first outdoor air outlet 15. The second outdoor air outlet 16 can be located on the side of the second casing section 36 opposite to the first casing section 35. The damper mechanism includes a fourth damper 7, which controls the opening and closing of the second outdoor air outlet 16.

[0119] It should be noted here that: (as...) Figure 3As shown, the first damper 9 can rotate via the first rotating shaft 10. The first damper 9 has three main states: a first state on the far left, a second state in the middle, and a third state on the far right. In the first state, the first damper 9 completely blocks the first indoor heat exchanger 3 from exiting through the third indoor air outlet 17. In the second state, the first damper 9 allows both the first indoor heat exchanger 3 and the second indoor heat exchanger 4 to exit through the third indoor air outlet 17. In the third state, the first damper 9 completely blocks the second indoor heat exchanger 4 from exiting through the third indoor air outlet 17.

[0120] The second air damper 55 can rotate around the second pivot 6. Its main states are the leftmost and rightmost positions. Its function is to switch between different return air inlets. When it is on the leftmost position, it can completely block the return air from the air inlet 13 of the heating channel 39. When it is on the rightmost position, it can completely block the return air from the indoor return air inlet 14 of the return air channel.

[0121] The aforementioned fourth damper 7 can rotate around the fourth pivot 8. When in its leftmost position, it allows airflow to exit through the second outdoor air outlet 16, while when in its rightmost position, it closes the second outdoor air outlet 16. An angle between these positions can adjust the amount of airflow exiting through the second outdoor air outlet 16. Similarly, the third damper 11 can rotate around the third pivot 12. When in its leftmost position, it allows airflow to exit through the first outdoor air outlet 15, while when in its rightmost position, it closes the first outdoor air outlet 15. An angle between these positions can adjust the amount of airflow exiting through the first outdoor air outlet 15.

[0122] To facilitate understanding of the changes in airflow path within an air conditioning system, a detailed explanation is provided below. For example... Figure 3 As shown, when the air conditioning system is in cooling mode, it uses the indoor return air inlet 14 of the return air duct for air return. At this time, the first damper 9 rotates to the leftmost position, completely blocking the circuit of the heating channel 39, thus avoiding resistance loss when air flows through the auxiliary heat exchanger 2. In addition, the fourth damper 7 and the third damper 11 are both in the rightmost position, completely isolating the first outdoor air outlet 15 and the second outdoor air outlet 16 from the air conditioning unit. Taking the second indoor heat exchanger 4 operating alone as an example, the first damper 9 is in the leftmost position, completely sealing off the airflow of the first indoor heat exchanger 3. Overall, air enters the air conditioning unit through the indoor return air inlet 14, is drawn by the heat exchange fan 1 (e.g., a blower), and after undergoing cooling exchange through the second indoor heat exchanger 4, the cold air is blown towards the cockpit from the third indoor air outlet 17. The operation of the first indoor heat exchanger 3 alone or the operation of both heat exchangers are similar; it is only necessary to control the first damper 9 to be in the rightmost or middle position. In addition, during this refrigeration operation, the pump body 29, such as the liquid pump, does not work, and the compressor 18 is cooled by natural air cooling.

[0123] When the air conditioning system is in heating mode, taking the first indoor heat exchanger 3 operating alone as an example, such as Figure 4 As shown, the first damper 9 is in the rightmost position. At this time, there is no refrigerant flowing in the second indoor heat exchanger 4, and no external air flows through it. Similarly, when operating with only the second indoor heat exchanger 4 or with both heat exchangers, it is only necessary to control the first damper 9 to be in the leftmost or middle position. To improve heating capacity and efficiency, the pump 29, such as a liquid pump, can be turned on. The refrigerant (such as coolant) in the coil 19 exchanges heat with the compressor 18 and gains heat, which then enters the auxiliary heat exchanger 2 to release heat and circulate. Correspondingly, the second damper 5 needs to be controlled to the rightmost position. At this time, the return air can exchange heat through the auxiliary heat exchanger 2. Under the action of the heat exchange fan 1, such as a blower, the pre-heated air then flows through the high-temperature first indoor heat exchanger 3 and is blown into the cockpit from the third indoor air outlet 17. In this way, the heat from the compressor 18 can be recovered, thus improving the heating capacity.

[0124] The heat exchanger self-cleaning mechanism of this invention can be achieved through frosting and defrosting of the heat exchanger. It can operate under both high-temperature cooling and low-temperature heating conditions, with almost no impact on the user's normal cooling and heating needs.

[0125] Taking the self-cleaning of the first indoor heat exchanger 3 as an example during high-temperature cooling, combined with... Figure 5 The refrigerant circulation is as normal as in refrigeration. All four valves (1st, 2nd, 25th, 3rd, 26th, and 4th) are open. The first damper 9 is on its leftmost side, and the third damper 11 is on its rightmost side. There is no airflow to the first indoor heat exchanger 3, causing rapid frost buildup on its surface. Meanwhile, the second indoor heat exchanger 4 can exchange heat normally with the air, ensuring cool air from the air conditioner. After the frost on the surface of the first indoor heat exchanger 3 is complete, combined with… Figure 6 The first switch valve 24 and the second switch valve 25 are closed, and the third damper 11 is controlled to open the first outdoor air outlet 15. Because the outside return air temperature is high, when the return air flows over the surface of the first indoor heat exchanger 3, the frost layer absorbs heat and melts into water, washing away the dust on the heat exchanger surface for cleaning. The resulting water droplets or water vapor are blown out by the air through the first outdoor air outlet 15. To prevent excessive airflow from escaping outdoors, as defrosting progresses, the opening angle of the third damper 11 is gradually reduced and eventually completely closed, ending the self-cleaning process. The self-cleaning principle of the second indoor heat exchanger 4 is the same and will not be elaborated further.

[0126] The self-cleaning principle is the same during low-temperature heating. Taking the self-cleaning of the first indoor heat exchanger 3 as an example, such as... Figure 7As shown, the pipeline switching component switches the air conditioning system to cooling mode. First switch valve 24 and second switch valve 25 are open, while third switch valve 26 and fourth switch valve 27 are closed. Third damper 11 and first damper 9 are in their rightmost and leftmost positions, respectively, resulting in no airflow to the first indoor heat exchanger 3. The refrigerant, after being throttled by the throttling device 23 (e.g., an electronic expansion valve), experiences poor heat exchange in the first indoor heat exchanger 3, causing frost to form on its surface. The airflow circuit differs from that during cooling, and since the user requires heating, to ensure a good experience in the cockpit, the heat from the compressor 18 can be temporarily supplied to the cockpit. Specifically, air enters the air conditioning unit through the air inlet 13 of the heating channel 39, absorbs heat from the auxiliary heat exchanger 2, and then enters the cockpit through the second indoor heat exchanger 4 and the third indoor air outlet 17. After the first indoor heat exchanger 3 completes its frost formation, combined with… Figure 8 The pipeline switching component 20 switches and reverses, enabling the air conditioning system to heat. The third switch valve 26 and the fourth switch valve 27 are opened, controlling the third damper 11 to its leftmost open position. At this time, part of the high-temperature refrigerant generated by the compressor 18 enters the first indoor heat exchanger 3 for defrosting, and the defrosting water cleans the heat exchanger. The other part of the refrigerant enters the second indoor heat exchanger 4 to participate in heating, producing a heating effect after heat exchange with the air. The air is also divided into two parts: one part carries away water droplets or water vapor from the surface of the first indoor heat exchanger 3, and the other part is heated by the second indoor heat exchanger 4 and blown into the cockpit. In particular, because the surface of the first indoor heat exchanger 3 is heated by both the internal refrigerant and the external air heated by the auxiliary heat exchanger 2, the defrosting and surface drying efficiency is higher. Similarly, to prevent more heat loss from the first outdoor air outlet 15, the third damper 11 needs to be gradually closed as the defrosting process progresses, ensuring that more heat is blown into the cockpit through the first outdoor air outlet 15.

[0127] An embodiment of the present invention provides a vehicle that may include any of the aforementioned air conditioning systems. The vehicle may be an automobile or the like. Because the vehicle uses the aforementioned air conditioning system, the valve mechanism can selectively operate either the first indoor heat exchanger 3 or the second indoor heat exchanger 4 individually, depending on the indoor load, to meet the low-load operating conditions of the air conditioning system. The valve mechanism can also operate the first indoor heat exchanger 3 and the second indoor heat exchanger 4 simultaneously to meet the high-load operating conditions of the air conditioning system or conditions with a large dehumidification load. This allows for adjustment of the number of heat exchangers open based on the indoor load, improving the user experience.

[0128] An embodiment of the present invention also provides a method for operating an air conditioning system, comprising: selectively opening the pipe of one of the first indoor heat exchanger 3 and the second indoor heat exchanger 4 according to the size of the indoor load, or opening the pipes of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4.

[0129] In the above example, the first indoor heat exchanger 3 or the second indoor heat exchanger 4 can be selectively operated individually according to the indoor load to meet the low-load operating conditions of the air conditioning system. The valve mechanism can also allow the first indoor heat exchanger 3 and the second indoor heat exchanger 4 to operate simultaneously to meet the high-load operating conditions of the air conditioning system or conditions with a large dehumidification load. Because the number of indoor heat exchangers opened can be automatically adjusted according to the indoor load, the system offers better adaptability.

[0130] In a specific application example, the above-mentioned selective opening of the piping of one of the first indoor heat exchanger 3 and the second indoor heat exchanger 4, or opening of the piping of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4, according to the size of the indoor load, specifically includes:

[0131] Detect the indoor temperature;

[0132] When the air conditioning system is cooling, if the indoor temperature is greater than or equal to the first cooling set temperature, the system controls the opening of the pipe of either the first indoor heat exchanger 3 or the second indoor heat exchanger 4; if the indoor temperature is greater than or equal to the second cooling set temperature, the system controls the opening of the pipes of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4; wherein the second cooling set temperature is greater than the first cooling set temperature.

[0133] When the air conditioning system is in heating mode, if the indoor temperature is less than or equal to the first heating set temperature, the system controls the opening of the pipe of either the first indoor heat exchanger 3 or the second indoor heat exchanger 4; if the indoor temperature is less than or equal to the second heating set temperature, the system controls the opening of the pipes of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4; wherein the second heating set temperature is less than the first heating set temperature.

[0134] In the example above, the indoor load is determined by detecting the indoor temperature, which is an advantage of conveniently detecting the size of the room.

[0135] When the air conditioning system includes a return air duct, and the return air duct has a first air outlet duct 37 and a second air outlet duct 38, the aforementioned method of operating the air conditioning system further includes:

[0136] When the air conditioning system is heating or cooling, if the pipe of either the first indoor heat exchanger 3 or the second indoor heat exchanger 4 is opened, only the air outlet passages in the first air outlet passage 37 and the second air outlet passage 38 corresponding to the opened pipe will be opened. If the pipes of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are opened, both the first air outlet passage 37 and the second air outlet passage 38 will be opened.

[0137] In the example above, when a single heat exchanger is operating, the damper mechanism only opens the air outlet channel corresponding to that heat exchanger. This helps to increase heat exchange and air volume, and reduces the loss of airflow from the other air outlet channel.

[0138] When the air conditioning system has a self-cleaning mode for the first indoor heat exchanger, the aforementioned air conditioning system operation method further includes:

[0139] In the self-cleaning mode of the first indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are controlled to open; the second air outlet duct 38 is controlled to open, and the first air outlet duct 37 is controlled to open after being closed for a set time.

[0140] In the example above, opening the second air outlet duct 38 allows airflow to the second indoor heat exchanger 4, enabling it to operate normally and ensuring the coolness of the air conditioner's output, with minimal impact on the user's normal cooling needs. Conversely, closing the first air outlet duct 37 prevents airflow to the first indoor heat exchanger 3, causing rapid frost buildup on its surface. Once the frost has completely formed, opening the first air outlet duct 37 allows return air to flow through the first indoor heat exchanger 3. Because the return air temperature is relatively high, the frost absorbs heat and melts into water as it flows over the surface of the first indoor heat exchanger 3, washing away dust and cleaning the surface. The resulting water droplets or water vapor are discharged through the first air outlet duct 37.

[0141] In another embodiment, when the air conditioning system also includes a heating channel 39 for supplying heat to the room, in the self-cleaning mode of the first indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of the first indoor heat exchanger 3 are controlled to open and the pipes of the second indoor heat exchanger 4 are controlled to close; the heating channel 39 and the second air outlet channel 38 are both controlled to open, and the first air outlet channel 37 is controlled to open after being closed for a set time.

[0142] In the above example, since both heating channel 39 and the second air outlet channel 38 are open, heating channel 39 can supply heat to the room through the second air outlet channel 38 without affecting the user's normal heating needs. When the first air outlet channel 37 is closed, there is no airflow at the first indoor heat exchanger 3, causing poor heat exchange of the refrigerant within the first indoor heat exchanger 3, resulting in frost formation on the surface of the first indoor heat exchanger 3. Once the frost on the surface of the first indoor heat exchanger 3 is complete, the first air outlet channel 37 is opened, allowing return air to flow through the first indoor heat exchanger 3. Because the return air temperature is relatively high, when the warmer return air flows over the surface of the first indoor heat exchanger 3, the frost absorbs heat and melts into water, washing away the dust on the surface of the first indoor heat exchanger 3 for cleaning. The resulting water droplets or water vapor are discharged through the first air outlet channel 37 from the return air.

[0143] When the air conditioning system has a second indoor heat exchanger self-cleaning mode, the aforementioned air conditioning system operation method also includes:

[0144] In the self-cleaning mode of the second indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of both the first indoor heat exchanger 3 and the second indoor heat exchanger 4 are controlled to open; the first air outlet duct 37 is controlled to open, and the second air outlet duct 38 is controlled to open after being closed for a set time.

[0145] In the example above, opening the first air outlet duct 37 allows airflow to the first indoor heat exchanger 3, enabling normal operation and ensuring cool air from the air conditioner, with minimal impact on the user's normal cooling needs. Closing the second air outlet duct 38 prevents airflow to the second indoor heat exchanger 4, causing rapid frost buildup. Once the frost has formed on the surface of the second indoor heat exchanger 4, opening the second air outlet duct 38 allows return air to flow through it. Because the return air temperature is relatively high, the frost absorbs heat and melts into water as it flows over the surface of the second indoor heat exchanger 4, washing away dust and cleaning the surface. The resulting water droplets or water vapor are discharged through the second air outlet duct 38.

[0146] In another embodiment, when the air conditioning system also includes a heating channel 39 for supplying heat to the room, in the self-cleaning mode of the second indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of the second indoor heat exchanger 4 are controlled to open, and the pipes of the first indoor heat exchanger 3 are controlled to close; the heating channel 39 and the first air outlet channel 37 are both controlled to open, and the second air outlet channel 38 is controlled to open after being closed for a set time.

[0147] In the above example, since both the heating channel 39 and the first air outlet channel 37 are open, the heating channel 39 can supply heat to the room through the first air outlet channel 37, so as not to affect the user's normal heating needs. However, when the second air outlet channel 38 is closed, there is no airflow at the second indoor heat exchanger 4, causing poor heat exchange of the refrigerant within the second indoor heat exchanger 4, resulting in frost formation on the surface of the second indoor heat exchanger 4. After the frost on the surface of the second indoor heat exchanger 4 is complete, the second air outlet channel 38 is opened, allowing return air to flow through the second indoor heat exchanger 4. Because the return air temperature is relatively high, when the warmer return air flows over the surface of the second indoor heat exchanger 4, the frost absorbs heat and melts into water, washing away the dust on the surface of the second indoor heat exchanger 4 for cleaning. The resulting water droplets or water vapor are discharged through the second air outlet channel 38 from the return air.

[0148] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air conditioning system, characterized by, The air conditioning system includes a compressor (18), a pipeline switching component (20), an outdoor heat exchanger (21), and a throttling device (23) connected in series. The air conditioning system also includes a first indoor heat exchanger (3), a second indoor heat exchanger (4), and a valve mechanism. The first indoor heat exchanger (3) and the second indoor heat exchanger (4) are connected in parallel between the throttling device (23) and the pipeline switching component (20). The valve mechanism is used to selectively open the pipeline of one of the first indoor heat exchanger (3) and the second indoor heat exchanger (4) or open the pipeline of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) according to the size of the indoor load. The air conditioning system also includes a return air duct, which has a first air outlet duct (37) and a second air outlet duct (38); the first indoor heat exchanger (3) is installed in the first air outlet duct (37) so that the airflow passing through the first indoor heat exchanger (3) is discharged through the first air outlet duct (37); the second indoor heat exchanger (4) is installed in the second air outlet duct (38) so that the airflow passing through the second indoor heat exchanger (4) is discharged through the second air outlet duct (38); wherein the first indoor heat exchanger (3) and the second indoor heat exchanger (4) are respectively installed in two independent air outlet ducts; the air conditioning system also includes a damper mechanism, which is used to control the opening and closing of the first air outlet duct (37) and the second air outlet duct (38); the air conditioning system has a self-cleaning mode for the first indoor heat exchanger. In the self-cleaning mode of the first indoor heat exchanger, the pipeline switching component (20) controls the air conditioning system to cool, the valve mechanism controls the pipelines of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) to open; the damper mechanism controls the second air outlet channel (38) to open, and controls the first air outlet channel (37) to open after a set time of closure. Alternatively, when the air conditioning system includes a heating channel (39) for supplying heat to the room, the damper mechanism is also used to control the opening or closing of the air outlet (51) of the heating channel, and when the air outlet (51) of the heating channel is opened, the air outlet (51) of the heating channel is connected to the indoor return air inlet (14) of the return air channel, and when the air outlet (51) of the heating channel is closed, the connection between the air outlet (51) of the heating channel and the indoor return air inlet (14) of the return air channel is disconnected. In the self-cleaning mode of the first indoor heat exchanger, the pipeline switching component (20) controls the air conditioning system to cool, the valve mechanism controls the pipeline of the first indoor heat exchanger (3) to open, and the pipeline of the second indoor heat exchanger (4) to close; the damper mechanism controls both the heating channel (39) and the second air outlet channel (38) to open, and controls the first air outlet channel (37) to open after a set time of closure.

2. The air conditioning system as described in claim 1, characterized in that, It also includes a temperature sensor for detecting the indoor temperature; When the pipeline switching component controls the air conditioning system to cool, if the indoor temperature is greater than or equal to the first cooling set temperature, the valve mechanism controls the pipeline of one of the first indoor heat exchanger (3) and the second indoor heat exchanger (4) to open; if the indoor temperature is greater than or equal to the second cooling set temperature, the valve mechanism controls the pipeline of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) to open; wherein the second cooling set temperature is greater than the first cooling set temperature. And / or, when the pipeline switching component controls the air conditioning system to heat, if the indoor temperature is less than or equal to the first heating set temperature, the valve mechanism controls the pipeline of one of the first indoor heat exchanger (3) and the second indoor heat exchanger (4) to open; if the indoor temperature is less than or equal to the second heating set temperature, the valve mechanism controls the pipeline of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) to open; wherein, the second heating set temperature is less than the first heating set temperature.

3. The air conditioning system as described in claim 1, characterized in that, The air conditioning system has heating and cooling modes. In the heating and cooling modes, the pipeline switching component controls the air conditioning system to heat or cool. The damper mechanism is used to open only the air outlet channels corresponding to the opened pipeline in the first air outlet channel (37) and the second air outlet channel (38) when the pipeline of one of the first indoor heat exchanger (3) and the second indoor heat exchanger (4) is opened, and to open both the first air outlet channel (37) and the second air outlet channel (38) when the pipelines of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) are opened.

4. The air conditioning system as described in claim 3, characterized in that, The air conditioning system includes a pump body (29), a coil (19), and an auxiliary heat exchanger (2). The pump body (29), the coil (19), and the auxiliary heat exchanger (2) are connected in sequence to form a refrigerant circulation loop. The coil (19) is fitted onto the compressor (18) so that the refrigerant in the coil (19) exchanges heat with the compressor (18). The auxiliary heat exchanger (2) exchanges heat with the airflow flowing through the heating channel (39) so that the heating channel (39) supplies heat to the room through the airflow after heat exchange with the auxiliary heat exchanger (2). Alternatively, the air conditioning system may include a heater for heating the airflow flowing through the heating channel (39), so that the heating channel (39) supplies heat to the room through the airflow heated by the heater.

5. The air conditioning system as described in any one of claims 1-4, characterized in that, The first air outlet duct (37) also has a first outdoor air outlet (15). In the self-cleaning mode of the first indoor heat exchanger, the first air outlet duct (37) is used to discharge air through the first outdoor air outlet (15) when it is opened after a set time of closure.

6. The air conditioning system as described in any one of claims 1 to 4, characterized in that, The air conditioning system has a second indoor heat exchanger self-cleaning mode; In the self-cleaning mode of the second indoor heat exchanger, the pipeline switching component (20) controls the air conditioning system to cool, the valve mechanism controls the pipelines of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) to open; the damper mechanism controls the first air outlet channel (37) to open, and controls the second air outlet channel (38) to open after a set time of closure. Alternatively, when the air conditioning system includes a heating channel (39) for supplying heat to the room, and the damper mechanism is also used to control the opening or closing of the air outlet (51) of the heating channel, and when the air outlet (51) of the heating channel is opened, the air outlet (51) of the heating channel is connected to the indoor return air inlet (14) of the return air channel, and when the air outlet (51) of the heating channel is closed, the connection between the air outlet (51) of the heating channel and the indoor return air inlet (14) of the return air channel is disconnected, in the self-cleaning mode of the second indoor heat exchanger, the pipeline switching component (20) controls the air conditioning system to cool, the valve mechanism controls the pipeline of the second indoor heat exchanger (4) to open, and the pipeline of the first indoor heat exchanger (3) to close; the damper mechanism controls the heating channel (39) and the first air outlet channel (37) to open, and controls the second air outlet channel (38) to open after a set time of closure.

7. The air conditioning system as described in claim 6, characterized in that, The second air outlet duct (38) also has a second outdoor air outlet (16). In the self-cleaning mode of the second indoor heat exchanger, the second air outlet duct (38) is used to discharge air through the second outdoor air outlet (16) when it is opened after a set closing time.

8. The air conditioning system as described in any one of claims 1 to 4 and 7, characterized in that, The first air outlet duct (37) has a first indoor air outlet (30), and the second air outlet duct (38) has a second indoor air outlet (31); The damper mechanism includes a first damper (9), which controls the opening and closing of both the first indoor air outlet (30) and the second indoor air outlet (31) through the first damper (9).

9. The air conditioning system as described in claim 8, characterized in that, The air conditioning system includes an air conditioning unit, which includes a housing and a heat exchange fan (1) disposed within the housing. The housing includes an air outlet duct shell, which has a first duct section (35) and a second duct section (36) connected in an L-shape. The first duct section (35) has a first opening (32) communicating with the interior of the air conditioning unit on the side near the heat exchange fan (1), and the first indoor heat exchanger (3) is disposed at the first opening (32). The second duct section (36) has a second opening (33) communicating with the interior of the air conditioning unit on the side near the heat exchange fan (1), and the second indoor heat exchanger (4) is disposed at the second opening (33). The first air outlet channel (37) includes the first shell section (35), through which air is discharged. The opening of the first shell section (35) near the second shell section (36) serves as the first indoor air outlet (30). The second air outlet channel (38) includes the second shell section (36), through which air is discharged. The opening of the second shell section (36) near the first shell section (35) serves as the second indoor air outlet (31). A third indoor air outlet (17) is provided at the connection point of the first shell section (35) and the second shell section (36) away from the heat exchange fan (1), which is connected to both the first indoor air outlet (30) and the second indoor air outlet (31). One end of the first damper (9) is hinged to the connection between the first shell section (35) and the second shell section (36) on the side close to the heat exchange fan (1). The first damper (9) is used to rotate to different positions to control the opening and closing of both the first indoor air outlet (30) and the second indoor air outlet (31).

10. The air conditioning system as described in claim 9, characterized in that, When the air conditioning system includes a heating channel (39) for supplying heat to the room, the damper mechanism is also used to control the opening or closing of the air outlet (51) of the heating channel, and when the air outlet (51) of the heating channel is opened, connects the air outlet (51) of the heating channel to the indoor return air inlet (14) of the return air channel, and when the air outlet (51) of the heating channel is closed, disconnects the connection between the air outlet (51) of the heating channel and the indoor return air inlet (14) of the return air channel. Includes a second damper (5); wherein, the housing also includes a housing (40), one end of the housing (40) is connected to the end of the first pipe section (35) away from the second pipe section (36), the other end of the housing (40) and the end of the second pipe section (36) away from the first pipe section (35) form the indoor return air vent (14), and a receiving cavity (41) for installing the heat exchange fan (1) is formed between the housing (40) and the air outlet pipe. The air outlet (51) of the heating channel has a first side (511) and a second side (512) opposite to each other. The first side (511) is connected to one side (141) of the indoor return air vent, and one end of the second damper (5) is hinged to the second side (512). The second damper (5) can be rotated to a first position and a second position. In the first position, the other end of the second damper (5) cooperates with the other side (142) of the indoor return air vent to open the air outlet (51) of the heating channel and connect the air outlet (51) of the heating channel to the indoor return air vent (14). In the second position, the other end of the second damper (5) cooperates with the first side (511) to close the air outlet (51) of the heating channel and disconnect the connection between the air outlet (51) of the heating channel and the indoor return air vent (14).

11. A vehicle, characterized in that, The air conditioning system included in any one of claims 1 to 10.

12. A method for operating an air conditioning system according to any one of claims 1 to 10, characterized in that, include: Depending on the size of the indoor load, one of the pipes of the first indoor heat exchanger (3) and the second indoor heat exchanger (4) may be opened, or both of the pipes of the first indoor heat exchanger (3) and the second indoor heat exchanger (4) may be opened.

13. The method for operating the air conditioning system as described in claim 12, characterized in that, The selective opening of the piping of one of the first indoor heat exchanger (3) and the second indoor heat exchanger (4), or the opening of the piping of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4), based on the size of the indoor load, specifically includes: Detect the indoor temperature; When the air conditioning system is cooling, if the indoor temperature is greater than or equal to the first cooling set temperature, the system controls the opening of the pipe of either the first indoor heat exchanger (3) or the second indoor heat exchanger (4); if the indoor temperature is greater than or equal to the second cooling set temperature, the system controls the opening of the pipes of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4); wherein the second cooling set temperature is greater than the first cooling set temperature. When the air conditioning system is heating, if the indoor temperature is less than or equal to the first heating set temperature, the system controls the opening of the pipe of either the first indoor heat exchanger (3) or the second indoor heat exchanger (4); if the indoor temperature is less than or equal to the second heating set temperature, the system controls the opening of the pipes of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4); wherein the second heating set temperature is less than the first heating set temperature.

14. The method for operating the air conditioning system as described in claim 12 or 13, characterized in that, When the air conditioning system includes a return air duct, and the return air duct has a first air outlet duct (37) and a second air outlet duct (38), the operating method includes: When the air conditioning system is heating or cooling, when the pipe of one of the first indoor heat exchanger (3) and the second indoor heat exchanger (4) is opened, only the air outlet channels in the first air outlet channel (37) and the second air outlet channel (38) corresponding to the opened pipe are opened, and when the pipes of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) are opened, both the first air outlet channel (37) and the second air outlet channel (38) are opened.

15. The method for operating the air conditioning system as described in claim 12 or 13, characterized in that, When the air conditioning system has a first indoor heat exchanger self-cleaning mode, the operating method further includes: In the self-cleaning mode of the first indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) are controlled to open; the second air outlet channel (38) is controlled to open, and the first air outlet channel (37) is controlled to open after a set time of closure. Alternatively, when the air conditioning system also includes a heating channel (39) for supplying heat to the room, in the self-cleaning mode of the first indoor heat exchanger, the air conditioning system is controlled to cool; the pipe of the first indoor heat exchanger (3) is controlled to open and the pipe of the second indoor heat exchanger (4) is controlled to close; the heating channel (39) and the second air outlet channel (38) are both controlled to open, and the first air outlet channel (37) is controlled to open after a set time of closure.

16. The method for operating the air conditioning system as described in claim 12 or 13, characterized in that, When the air conditioning system has a second indoor heat exchanger self-cleaning mode, the operating method further includes: In the self-cleaning mode of the second indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of both the first indoor heat exchanger (3) and the second indoor heat exchanger (4) are controlled to open; the first air outlet channel (37) is controlled to open, and the second air outlet channel (38) is controlled to open after a set time of closure. Alternatively, when the air conditioning system also includes a heating channel (39) for supplying heat to the room, in the self-cleaning mode of the second indoor heat exchanger, the air conditioning system is controlled to cool; the pipes of the second indoor heat exchanger (4) are controlled to open, and the pipes of the first indoor heat exchanger (3) are controlled to close; the heating channel (39) and the first air outlet channel (37) are both controlled to open, and the second air outlet channel (38) is controlled to open after a set time of closure.

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