Self-cleaning control method of air conditioner and air conditioner

Abstract

The present application relates to the field of air handling equipment, and more specifically, to a self-cleaning control method of an air conditioner and an air conditioner, wherein the air conditioner comprises an upper fan, a lower fan, an upper air outlet, a lower air outlet, a compressor, an indoor heat exchanger, a first blocking mechanism, and a second blocking mechanism. The first blocking mechanism and the second blocking mechanism can form a third flow path connecting the upper fan and the lower fan inside the housing, so that when the air conditioner needs to be dried, the dry air flow flows along the inner third flow path and is not easy to flow out of the housing, thereby not easily affecting the temperature of the space where the air conditioner is located, thereby ensuring the user experience of the air conditioner. At the same time, the air conditioner can be dried, and it is not easy to breed bacteria and produce odor, which further improves the user experience of the air conditioner.

Description

Technical Field

[0001] The present application relates to the field of air handling equipment, and in particular to a self-cleaning control method for an air conditioner and an air conditioner. Background Art

[0002] When the air conditioner is in cooling operation, when the air outlet temperature is lower than the dew point temperature of the air, the water vapor in the air will precipitate and become condensed water and condense on the air conditioner. When the cooling operation is stopped, there will be residual condensed water attached to the heat exchanger or the air duct. After a long time, a humid environment will be generated inside the air conditioner, and bacteria will grow. The next time you restart the air outlet, it is very easy to have odor problems such as bad smell.

[0003] The existing practice usually adopts heating and drying, but since the room temperature is already in a more suitable range after cooling operation, if heating and drying are used again, the high-temperature air will be blown into the human activity area, causing the room temperature to rise, affecting the user experience of the air conditioner. Summary of the invention

[0004] The present application provides a self-cleaning control method for an air conditioner and an air conditioner, so as to at least solve the technical problem of poor air conditioner usage experience caused by removing condensed water.

[0005] According to a first aspect of an embodiment of the present application, a self-cleaning control method for an air conditioner is provided, wherein the air conditioner is provided with an upper air outlet, a lower air outlet, and an air duct connected to the upper air outlet and the lower air outlet, and an indoor heat exchanger, a flow path control mechanism, an upper fan, and a lower fan arranged on the air duct, wherein:

[0006] The upper fan is arranged corresponding to the upper air outlet, and the lower fan is arranged corresponding to the lower air outlet;

[0007] The air conditioner is provided with a cooling mode, a heating mode and a drying mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner;

[0008] When the air conditioner is in the cooling mode, the flow path control mechanism controls the air duct to form a first flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the airflow to flow from the lower air outlet to the upper air outlet in the first flow path;

[0009] When the air conditioner is in the heating mode, the flow path control mechanism controls the air duct to form a second flow path connecting the upper air port and the lower air port inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the airflow to flow from the upper air port to the lower air port in the second flow path;

[0010] The self-cleaning control method comprises:

[0011] Control the air conditioner to switch to drying mode after the cooling operation ends;

[0012] Controlling the flow path control mechanism to operate and one of the upper fan and the lower fan to open, so that a third flow path of a closed cycle is formed in the air duct;

[0013] Acquire environmental parameters of the indoor space where the air conditioner is located;

[0014] A drying strategy for executing the drying mode is selected according to the humidity condition of the indoor space represented by the environmental parameters, wherein the drying strategy includes selecting a corresponding compressor operating frequency, an electronic expansion valve opening, and a drying time according to the humidity condition of the indoor space.

[0015] Optionally, the environmental parameter includes a first humidity;

[0016] The step of selecting a drying strategy for executing the drying mode according to the humidity of the indoor space represented by the environmental parameter comprises:

[0017] If the first humidity is lower than a preset humidity threshold, a first drying strategy is executed, wherein the first drying strategy performs drying in the refrigerant flow path in the cooling mode;

[0018] If the first humidity is higher than or equal to the humidity threshold, a second drying strategy is executed, wherein the second drying strategy performs drying in the refrigerant flow path in the heating mode.

[0019] Optionally, the refrigerant flow path in the cooling mode passes through a compressor and an electronic expansion valve, the environmental parameter includes a first temperature, and the compressor operating frequency includes a first operating frequency;

[0020] The implementation of the first drying strategy includes:

[0021] controlling the compressor to operate at the first operating frequency;

[0022] Controlling the outdoor fan of the air conditioner to be closed and increasing the opening of the electronic expansion valve to change the heat exchange temperature of the indoor heat exchanger, so as to change the temperature of the airflow in the third flow path;

[0023] acquiring a second temperature of the airflow in the third flow path;

[0024] If the second temperature satisfies a preset first exit condition, the drying mode is exited.

[0025] Optionally, after obtaining the second temperature of the airflow in the third flow path, the method further includes:

[0026] The operating frequency of the compressor is adjusted according to the second temperature so that the second temperature reaches the first temperature.

[0027] Optionally, the drying time includes a first drying time;

[0028] The method further comprises:

[0029] If the second temperature reaches the first temperature and the first drying time of the first drying strategy reaches a preset first preset time, it is determined that the second temperature meets the first exit condition.

[0030] Optionally, the refrigerant flow path in the heating mode passes through a compressor and a four-way valve, the environmental parameter includes a first temperature, and the compressor operating frequency includes a second operating frequency;

[0031] The implementation of the second drying strategy includes:

[0032] controlling the compressor to operate at the second operating frequency;

[0033] Controlling the four-way valve to be energized so that the air conditioner switches to the refrigerant flow path in the heating mode, wherein the refrigerant in the refrigerant flow path in the heating mode increases the heat exchange temperature of the indoor heat exchanger to increase the temperature of the airflow in the third flow path;

[0034] acquiring a second temperature of the airflow in the third flow path;

[0035] adjusting the operating frequency of the compressor according to the second temperature so that the second temperature exceeds the first temperature;

[0036] If the second temperature satisfies a preset second exit condition, the drying mode is exited.

[0037] Optionally, the self-cleaning control method further includes:

[0038] When the air conditioner ends the cooling mode, determining that the air conditioner ends the cooling operation to enter the drying mode,

[0039] And / or, when the air conditioner ends the cooling stage in the self-cleaning control method, it is determined that the air conditioner ends the cooling operation to enter the drying mode.

[0040] Optionally, the self-cleaning control method further includes:

[0041] Close the upper air vent and the lower air vent.

[0042] According to a second aspect of an embodiment of the present application, an air conditioner is provided, the air conditioner comprising an upper air outlet, a lower air outlet, and an air duct connected to the upper air outlet and the lower air outlet, and an indoor heat exchanger, a flow path control mechanism, an upper fan, and a lower fan arranged on the air duct, wherein:

[0043] The upper fan is arranged corresponding to the upper air outlet, and the lower fan is arranged corresponding to the lower air outlet;

[0044] The air conditioner is provided with a cooling mode, a heating mode and a drying mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner;

[0045] When the air conditioner is in the cooling mode, the flow path control mechanism controls the air duct to form a first flow path connecting the upper air outlet and the lower air outlet inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the airflow to flow from the lower air outlet to the upper air outlet in the first flow path;

[0046] When the air conditioner is in the heating mode, the flow path control mechanism controls the air duct to form a second flow path connecting the upper air port and the lower air port inside the air conditioner, and at least one of the upper fan and the lower fan provides power for the airflow to flow from the upper air port to the lower air port in the second flow path;

[0047] When the air conditioner is in the drying mode, the flow path control mechanism controls the air duct to form a third flow path of a closed circulation inside the air conditioner, the upper fan or the lower fan provides power for the airflow to flow in the third flow path, and the self-cleaning control method described above is adopted.

[0048] Optionally, the air conditioner further comprises a housing and a compressor;

[0049] The indoor heat exchanger is in communication with the refrigerant of the compressor;

[0050] The upper air vent is selectively openable and closable and is arranged at the upper part of the shell, and the lower air vent is selectively openable and closable and is arranged at the lower part of the shell;

[0051] The indoor heat exchanger is located in the housing, an air inlet channel is formed between the first side of the indoor heat exchanger and the upper air port and the lower air port, and the upper fan and the lower fan are both located on the second side of the indoor heat exchanger away from the air inlet channel;

[0052] The upper fan is arranged close to the upper air outlet, and the lower fan is arranged close to the lower air outlet;

[0053] The upper fan comprises a first air port, a second air port and a first axial positive air port. After the upper fan is started, the air flow passing through the indoor heat exchanger enters from the first axial positive air port and flows out from the first air port and / or the second air port.

[0054] The down fan comprises a third air outlet, a fourth air outlet and a second axial positive air outlet. After the down fan is started, the air flow passing through the indoor heat exchanger enters from the second axial positive air outlet and flows out from the third air outlet and / or the fourth air outlet;

[0055] A first upper ventilation channel is formed inside the housing and is located between the first air outlet and the upper air outlet;

[0056] A second upper ventilation flow channel is formed inside the shell and is located between the second air outlet and the upper air outlet;

[0057] A first lower ventilation flow channel is formed inside the shell and is located between the fourth air outlet and the lower air outlet;

[0058] A second lower ventilation flow channel is formed inside the shell and is located between the third air outlet and the lower air outlet;

[0059] A central air flow passage is formed inside the housing and is located between the second air outlet and the third air outlet;

[0060] The flow path control mechanism includes a first blocking mechanism for selectively opening and closing the first upper ventilation flow channel and / or the second upper ventilation flow channel;

[0061] The flow path control mechanism includes a second blocking mechanism for selectively opening and closing the first lower ventilation flow channel and / or the second lower ventilation flow channel;

[0062] The first blocking mechanism and the second blocking mechanism can form the third flow path between the upper fan, the middle air flow channel and the lower fan, so that the airflow inside the shell flows along the third flow path inside the shell under the agitation of the upper fan or the lower fan.

[0063] Optionally, the first blocking mechanism includes a first volute tongue and a first baffle;

[0064] The first volute tongue is slidably disposed on the upper fan, and is used to selectively block any one of the first air outlet and the second air outlet, and when the first volute tongue blocks the first air outlet, the second air outlet is communicated with both the second upper ventilation channel and the middle ventilation channel, and when the first volute tongue blocks the second air outlet, the first air outlet is communicated with the first upper ventilation channel;

[0065] The first baffle is rotatably disposed on the side wall of the second upper ventilation channel and is located between the second air outlet and the upper air outlet. When the first baffle is in an open state, the second air outlet is connected to the upper air outlet to make the second upper ventilation channel conductive. When the first baffle is in a closed state, the channel between the second air outlet and the upper air outlet is blocked to block the second upper ventilation channel.

[0066] Optionally, the second blocking mechanism includes a second volute tongue and a second baffle;

[0067] The second volute tongue is slidably disposed on the lower fan, and is used to selectively block any one of the third air outlet and the fourth air outlet, and when the second volute tongue blocks the third air outlet, the fourth air outlet is communicated with the first lower ventilation flow channel, and when the second volute tongue blocks the fourth air outlet, the third air outlet is communicated with both the second lower ventilation flow channel and the middle ventilation flow channel;

[0068] The second baffle is rotatably disposed on the side wall of the second lower ventilation channel and is located between the third air outlet and the lower air outlet. When the second baffle is in an open state, the third air outlet is connected to the lower air outlet to make the second lower ventilation channel conductive. When the second baffle is in a closed state, the channel between the third air outlet and the lower air outlet is blocked to block the second lower ventilation channel.

[0069] Optionally, when the air conditioner is in the cooling mode, the first volute tongue blocks the second air outlet, the first baffle is in an open state, the second volute tongue blocks the fourth air outlet, and the second baffle is in a closed state, so as to form the first flow path in the housing, so that the airflow entering the lower air outlet flows along the first flow path. The path includes:

[0070] The airflow enters the indoor heat exchanger through the air inlet duct, and then enters the first axial positive air port of the upper fan and the second axial positive air port of the lower fan respectively. The airflow entering the first axial positive air port flows from the first air port to the upper air port through the first upper ventilation duct, and the airflow entering the second axial positive air port flows from the third air port to the upper air port through the middle ventilation duct and the second upper ventilation duct.

[0071] When the air conditioner is in a heating mode, the first volute tongue blocks the first air outlet, the first baffle is in a closed state, the second volute tongue blocks the third air outlet, and the second baffle is in an open state, so as to form the second flow path in the housing, so that the airflow entering the upper air outlet flows along the second flow path. The path includes:

[0072] The airflow enters the indoor heat exchanger through the air inlet duct, and then enters the first axial positive air port of the upper fan and the second axial positive air port of the lower fan respectively. The airflow entering the first axial positive air port flows from the second air port through the middle air flow channel and the second lower air flow channel to the lower air port. The airflow entering the second axial positive air port flows from the fourth air port through the first lower air flow channel to the lower air port.

[0073] When the air conditioner is in the drying mode, the positions of the first volute tongue, the first baffle, the second volute tongue and the second baffle are the same as those in the cooling mode, the upper air outlet and the lower air outlet are both closed, the upper fan is started, and the lower fan is braked, so as to form the third flow path in the casing based on the air flow path formed by the lower fan, so that the upper fan blows the air of the third flow path from the first axial positive air outlet to the first air outlet, and then passes through the first upper ventilation flow channel, the second upper ventilation flow channel, the middle ventilation flow channel, the third air outlet and the second axial positive air outlet in sequence, and flows in the third flow path.

[0074] Optionally, an upper vent that can be selectively opened and closed is provided in the air inlet passage between the upper air port and the indoor heat exchanger, and a lower vent that can be selectively opened and closed is provided in the air inlet passage between the lower air port and the indoor heat exchanger.

[0075] Optionally, the upper fan further comprises a first axial reverse air port, and a first flow path is formed in the housing to connect the second side of the indoor heat exchanger with the first axial reverse air port, so that after the upper fan is started, the airflow passing through the indoor heat exchanger enters the upper fan from the first axial positive air port and from the first axial reverse air port through the first flow path respectively;

[0076] The down fan also includes a second axial reverse air port, and a second flow path connecting the second side of the indoor heat exchanger with the second axial reverse air port is formed in the outer shell, so that after the down fan is started, the air flow passing through the indoor heat exchanger enters the down fan from the second axial positive air port and from the second axial reverse air port through the second flow path.

[0077] In the embodiment of the present application, a third flow path of a closed circulation can be formed inside the air conditioner, so that the interior of the air conditioner needs to be cleaned, for example, the condensed water in the air conditioner is cleaned, and the air flow inside the air conditioner flows in the third flow path. The air flow in the air conditioner will neither flow into the indoor space where the air conditioner is located, thereby not easily affecting the temperature of the indoor space where the air conditioner is located, nor can the interior of the air conditioner be cleaned, so that it is not easy for condensed water to remain inside the air conditioner and bacteria to grow, and it is not easy for an odor to appear when the air conditioner is used next time, thereby improving the user experience of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1FIG. 1 is a schematic diagram of an interior side view of an air conditioner in an embodiment.

[0079] Figure 2 It is a schematic diagram of the interior front view of an air conditioner in an embodiment.

[0080] Figure 3 It is a schematic diagram of the interior front view of the air conditioner during cooling in an embodiment.

[0081] Figure 4 It is a schematic diagram of the interior side view of the air conditioner during cooling in one embodiment.

[0082] Figure 5 It is a schematic diagram of the interior front view of the air conditioner during drying in one embodiment.

[0083] Figure 6 The present invention is a flow chart of a drying method for an air conditioner in an embodiment.

[0084] Figure 7 It is a flow chart of the drying method of the air conditioner in an application scenario.

[0085] Figure 8 It is a flow chart of an air conditioner executing a first drying mode in an application scenario.

[0086] Fig. 9 It is a flow chart of an air conditioner executing a second drying mode in an application scenario.

[0087] Marking instructions: 1. Shell; 11. Upper air outlet; 12. Lower air outlet; 13. Air inlet channel; 14. First upper ventilation channel; 15. Second upper ventilation channel; 16. First lower ventilation channel; 17. Second lower ventilation channel; 18. Middle ventilation channel;

[0088] 2. Indoor heat exchanger;

[0089] 3. Upper fan; 31. First air outlet; 32. Second air outlet; 33. First axial positive air outlet; 34. First axial negative air outlet;

[0090] 4. Lower fan; 41. Third air outlet; 42. Fourth air outlet; 43. Second axial positive air outlet; 44. Second axial negative air outlet;

[0091] 5. First blocking mechanism; 51. First volute tongue; 52. First baffle;

[0092] 6. second blocking mechanism; 61. second volute tongue; 62. second baffle;

[0093] 7. Upper vent;

[0094] 8. Lower vent;

[0095] 9. The first flow path;

[0096] 10. Second flow path. DETAILED DESCRIPTION

[0097] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0098] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0099] According to an embodiment of the present application, a self-cleaning control method for an air conditioner and an embodiment of the air conditioner are provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0100] like Figure 1-6 As shown, the air conditioner is provided with an upper air outlet 11, a lower air outlet 12 and an air duct connected with the upper air outlet 11 and the lower air outlet 12, and an indoor heat exchanger 2, a flow path control mechanism, an upper fan 3 and a lower fan 4 arranged on the air duct, wherein:

[0101] The upper fan 3 is arranged corresponding to the upper air outlet 11, and the lower fan 4 is arranged corresponding to the lower air outlet 12;

[0102] The air conditioner is provided with a cooling mode, a heating mode and a drying mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner;

[0103] When the air conditioner is in cooling mode, the flow path control mechanism controls the air duct to form a first flow path 9 connecting the upper air outlet 11 and the lower air outlet 12 inside the air conditioner, and at least one of the upper fan 3 and the lower fan 4 provides power for the air flow to flow from the lower air outlet 12 to the upper air outlet 11 in the first flow path 9;

[0104] When the air conditioner is in heating mode, the flow path control mechanism controls the air duct to form a second flow path 10 connecting the upper air outlet 11 and the lower air outlet 12 inside the air conditioner, and at least one of the upper fan 3 and the lower fan 4 provides power for the air flow to flow from the upper air outlet 11 to the lower air outlet 12 in the second flow path 10;

[0105] Self-cleaning control methods include:

[0106] S101, controlling the air conditioner to enter a drying mode after the cooling operation is completed;

[0107] S102, controlling the flow path control mechanism to operate and turning on one of the upper fan 3 and the lower fan 4, so that a third flow path of a closed circulation is formed in the air duct;

[0108] S103, obtaining environmental parameters of the indoor space where the air conditioner is located;

[0109] S104, selecting a drying strategy for executing a drying mode according to the humidity of the indoor space represented by the environmental parameters, wherein the drying strategy includes selecting a corresponding compressor operating frequency, an electronic expansion valve opening, and a drying time according to the humidity of the indoor space.

[0110] It should be noted that the present embodiment does not specifically limit the structure of the flow path control mechanism. The flow path control mechanism can be an integral component located in the air duct. When the position of at least one component in the flow path control mechanism is changed, the switching between the first flow path 9, the second flow path 10 and the third flow path is achieved. In addition, the flow path control mechanism can also include a plurality of components that are not connected, and the plurality of components that are not connected are respectively arranged at different positions of the air duct to control the air flow at different positions of the air duct, thereby achieving the switching between the first flow path 9, the second flow path 10 and the third flow path. For ease of understanding, for example, the flow path control mechanism includes structures such as baffles, valves, etc. that are rotationally connected or slidably connected to the air conditioner. The flow path is switched by controlling the position of structures such as baffles, and the flow path is switched by controlling the switch state of structures such as valves.

[0111] It should be noted that, in one embodiment, the self-cleaning control method includes a self-cleaning mode, and the self-cleaning mode includes a drying mode. In addition to the drying mode, the self-cleaning mode may also include a cooling stage, a heating stage, etc. This embodiment does not specifically limit this.

[0112] Through the above content, a closed circulating third flow path can be formed inside the air conditioner, so that the interior of the air conditioner needs to be cleaned, for example, the condensed water in the air conditioner is cleaned, and the air flow inside the air conditioner flows in the third flow path. The air flow in the air conditioner will neither flow into the indoor space where the air conditioner is located, thereby not easily affecting the temperature of the indoor space where the air conditioner is located, nor can the interior of the air conditioner be cleaned, making it difficult for condensed water to remain inside the air conditioner and for bacteria to grow, and it is not easy to have an odor when the air conditioner is used next time, thereby improving the user experience of the air conditioner.

[0113] In another embodiment of the present application, the environmental parameter includes a first humidity;

[0114] The drying strategy for executing the drying mode is selected according to the humidity of the indoor space represented by the environmental parameters, including:

[0115] If the first humidity is lower than a preset humidity threshold, a first drying strategy is executed, wherein the first drying strategy performs drying in the refrigerant flow path in the cooling mode;

[0116] If the first humidity is higher than or equal to the humidity threshold, a second drying strategy is executed, wherein the second drying strategy performs drying in the refrigerant flow path in the heating mode.

[0117] The humidity threshold can be set according to actual needs, and this embodiment does not specifically limit this. For example, in one embodiment, the humidity threshold is set to RH70%; in other embodiments, the humidity threshold can also be set to RH50%, 60% or 30%.

[0118] If the first humidity is lower than the humidity threshold, it proves that the humidity of the indoor space where the air conditioner is located is not very high. Therefore, after the air conditioner ends the cooling operation, it is not easy for a large amount of condensed water to appear inside. At this time, the first drying strategy can be implemented. On the contrary, if the first humidity is higher than or equal to the humidity threshold, it proves that the humidity of the indoor space where the air conditioner is located is high and condensed water is easy to appear. Therefore, after the air conditioner ends the cooling operation, a large amount of condensed water is easy to appear. At this time, the second drying strategy can be implemented.

[0119] Through the above content, when condensation water is not easy to appear inside the air conditioner, executing the first drying strategy of drying the refrigerant flow path in the cooling mode helps to reduce the control of the air conditioner and reduce energy consumption. When condensation water is easy to appear inside the air conditioner, executing the second drying strategy of drying the refrigerant flow path in the heating mode helps to improve the drying efficiency and drying effect, making it difficult for condensation water to remain inside the air conditioner, thereby making it difficult for bacteria to grow and producing odor when the air conditioner is used next time, thereby improving the user experience of the air conditioner.

[0120] In another embodiment of the present application, the refrigerant flow path in the cooling mode passes through the compressor and the electronic expansion valve, the environmental parameter includes a first temperature, and the compressor operating frequency includes a first operating frequency;

[0121] Implement the first drying strategy, including:

[0122] controlling the compressor to operate at a first operating frequency;

[0123] Control the outdoor fan of the air conditioner to close and increase the opening of the electronic expansion valve to change the heat exchange temperature of the indoor heat exchanger 2, so as to change the temperature of the air flow in the third flow path;

[0124] acquiring a second temperature of the airflow in the third flow path;

[0125] If the second temperature meets the preset first exit condition, the drying mode is exited.

[0126] It should be noted that the air conditioner includes a compressor and an indoor heat exchanger 2, and a refrigerant flow path for circulating the refrigerant is formed between the compressor and the indoor heat exchanger 2. On the refrigerant flow path, a control device such as an electronic expansion valve is provided to change the flow path of the refrigerant or change the temperature of the refrigerant. The specific structure is not limited in this embodiment. In addition, the air conditioner also includes an external fan for supplying air to the outdoor heat exchanger or compressor of the air conditioner to affect the temperature of the refrigerant. The specific function and installation position of the external fan are not specifically limited in this embodiment.

[0127] Among them, when the opening of the electronic expansion valve increases, the temperature of the refrigerant entering the indoor heat exchanger 2 will be higher, which helps to increase the heat exchange temperature of the indoor heat exchanger 2, thereby increasing the temperature of the air flow in the third flow path, heating the condensed water inside the air conditioner, and promoting the evaporation of the condensed water.

[0128] Through the above content, the compressor operating frequency and the opening of the electronic expansion valve are adjusted, so that under the first drying strategy, there is no need to change the refrigerant flow path, reducing the control of the air conditioner, which helps to reduce the energy consumption of the air conditioner and improve the self-cleaning efficiency of the air conditioner.

[0129] In another embodiment of the present application, after obtaining the second temperature of the airflow in the third flow path, the method further includes:

[0130] The operating frequency of the compressor is adjusted according to the second temperature so that the second temperature reaches the first temperature.

[0131] The operating frequency of the compressor affects the temperature of the refrigerant entering the indoor heat exchanger 2. Based on this, when the second temperature is lower than the first temperature, the operating frequency of the compressor is adjusted to increase the temperature of the refrigerant entering the indoor heat exchanger 2, which is beneficial to heating the condensed water in the third flow path. Specifically, in one embodiment, the temperature of the refrigerant entering the indoor heat exchanger 2 is increased by increasing the operating frequency of the compressor.

[0132] In addition, the flow rate of the compressor can be adjusted, that is, the amount of refrigerant can be adjusted. By increasing the flow rate of the compressor, more refrigerant can exchange heat with the indoor heat exchanger 2, thereby increasing the temperature of the air flow in the third flow path.

[0133] Through the above content, by adjusting the operating frequency of the compressor, the self-cleaning efficiency of the air conditioner can be improved.

[0134] In another embodiment of the present application, the drying time period includes a first drying time period;

[0135] The method also includes:

[0136] If the second temperature reaches the first temperature and the first drying time of the first drying strategy reaches a preset first preset time, it is determined that the second temperature satisfies the first exit condition.

[0137] The first preset time length is set according to the demand. Specifically, for example, the first preset time length is determined according to the humidity threshold, and the larger the humidity threshold, the larger the first preset time length.

[0138] Through the above content, determining the timing of exiting the drying mode according to the second temperature and the first drying time helps to reasonably control the self-cleaning time of the air conditioner and reduce the energy consumption of the air conditioner.

[0139] In another embodiment of the present application, the refrigerant flow path in the heating mode passes through the compressor and the four-way valve, the environmental parameter includes a first temperature, and the compressor operating frequency includes a second operating frequency;

[0140] Implement a second drying strategy, including:

[0141] controlling the compressor to operate at a second operating frequency;

[0142] Controlling the four-way valve to be energized so that the air conditioner switches to the refrigerant flow path in the heating mode, wherein the refrigerant in the refrigerant flow path in the heating mode increases the heat exchange temperature of the indoor heat exchanger 2 to increase the temperature of the air flow in the third flow path;

[0143] acquiring a second temperature of the airflow in the third flow path;

[0144] adjusting the operating frequency of the compressor according to the second temperature so that the second temperature exceeds the first temperature;

[0145] If the second temperature satisfies a preset second exit condition, the drying mode is exited.

[0146] Specifically, the second operating frequency is the same as the first operating frequency. A four-way valve is provided in the refrigerant flow path of the air conditioner. When the four-way valve is not energized, it is the refrigerant flow path in the cooling mode. When the four-way valve is energized, the flow path inside the four-way valve changes, so that the flow direction of the refrigerant when passing through the four-way valve changes, and it is the refrigerant flow path in the heating mode. The second exit condition is the same as the first exit condition. Specifically, if the second temperature reaches the first temperature and the second drying time of the second drying strategy reaches the preset second preset time, it is determined that the second temperature meets the second exit condition.

[0147] Through the above content, when there is a lot of condensed water inside the air conditioner, the refrigerant flow path of the air conditioner is switched so that the airflow in the third flow path can rise to a higher temperature, thereby more efficiently cleaning the condensed water and improving the self-cleaning efficiency of the air conditioner.

[0148] In another embodiment of the present application, the self-cleaning control method further includes:

[0149] When the air conditioner ends the cooling mode, it is determined that the air conditioner ends the cooling operation to switch to the drying mode.

[0150] And / or, when the air conditioner ends the cooling stage in the self-cleaning control method, it is determined that the air conditioner ends the cooling operation to enter the drying mode.

[0151] That is, in one embodiment, the air conditioner automatically enters the drying mode after each operation of the cooling mode. In another embodiment, the self-cleaning control method includes a cooling stage and a drying mode. After the cooling stage is over, the drying mode is automatically performed to remove the condensed water generated in the cooling stage, thereby achieving self-cleaning of the air conditioner and preventing the air conditioner from generating odor.

[0152] The present application also provides an air conditioner, such as Figure 1-6 As shown, the air conditioner includes an upper air outlet 11, a lower air outlet 12, and an air duct connected to the upper air outlet 11 and the lower air outlet 12, as well as an indoor heat exchanger 2, a flow path control mechanism, an upper fan 3 and a lower fan 4 arranged on the air duct, wherein:

[0153] The upper fan 3 is arranged corresponding to the upper air outlet 11, and the lower fan 4 is arranged corresponding to the lower air outlet 12;

[0154] The air conditioner is provided with a cooling mode, a heating mode and a drying mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner;

[0155] When the air conditioner is in cooling mode, the flow path control mechanism controls the air duct to form a first flow path 9 connecting the upper air outlet 11 and the lower air outlet 12 inside the air conditioner, and at least one of the upper fan 3 and the lower fan 4 provides power for the air flow to flow from the lower air outlet 12 to the upper air outlet 11 in the first flow path 9;

[0156] When the air conditioner is in heating mode, the flow path control mechanism controls the air duct to form a second flow path 10 connecting the upper air outlet 11 and the lower air outlet 12 inside the air conditioner, and at least one of the upper fan 3 and the lower fan 4 provides power for the air flow to flow from the upper air outlet 11 to the lower air outlet 12 in the second flow path 10;

[0157] When the air conditioner is in dry mode, the flow path control mechanism controls the air duct to form a closed circulation third flow path inside the air conditioner, the upper fan 3 or the lower fan 4 provides power for the airflow to flow in the third flow path, and the above-mentioned self-cleaning control method is adopted.

[0158] In one embodiment, the air conditioner comprises a housing 1 and a compressor;

[0159] The indoor heat exchanger 2 is in communication with the refrigerant of the compressor;

[0160] The upper air vent 11 is selectively opened and closed and is arranged at the upper part of the housing 1, and the lower air vent 12 is selectively opened and closed and is arranged at the lower part of the housing 1;

[0161] The indoor heat exchanger 2 is located in the housing 1, an air inlet channel 13 is formed between the first side of the indoor heat exchanger 2 and the upper air port 11 and the lower air port 12, and the upper fan 3 and the lower fan 4 are both located on the second side of the indoor heat exchanger 2 away from the air inlet channel 13;

[0162] The upper fan 3 is arranged close to the upper air outlet 11, and the lower fan 4 is arranged close to the lower air outlet 12;

[0163] The upper fan 3 includes a first air port 31, a second air port 32 and a first axial positive air port 33. After the upper fan 3 is started, the air flow passing through the indoor heat exchanger 2 enters from the first axial positive air port 33 and flows out from the first air port 31 and / or the second air port 32;

[0164] The down fan 4 comprises a third air port 41, a fourth air port 42 and a second axial positive air port 43. After the down fan 4 is started, the air flow passing through the indoor heat exchanger 2 enters from the second axial positive air port 43 and flows out from the third air port 41 and / or the fourth air port 42;

[0165] A first upper ventilation channel 14 is formed inside the housing 1 and is located between the first air outlet 31 and the upper air outlet 11;

[0166] A second upper ventilation channel 15 is formed inside the housing 1 and is located between the second air outlet 32 ​​and the upper air outlet 11;

[0167] A first lower ventilation channel 16 is formed inside the housing 1 and is located between the fourth air outlet 42 and the lower air outlet 12;

[0168] A second lower ventilation channel 17 is formed inside the housing 1 and is located between the third air outlet 41 and the lower air outlet 12;

[0169] A central air flow passage 18 is formed inside the housing 1 and is located between the second air outlet 32 ​​and the third air outlet 41;

[0170] The flow path control mechanism includes a first blocking mechanism 5 for selectively opening and closing the first upper ventilation flow channel 14 and / or the second upper ventilation flow channel 15;

[0171] The flow path control mechanism includes a second blocking mechanism 6 for selectively opening and closing the first lower ventilation flow channel 16 and / or the second lower ventilation flow channel 17;

[0172] The first blocking mechanism 5 and the second blocking mechanism 6 can form a third flow path between the upper fan 3, the middle air flow channel 18 and the lower fan 4, so that the air flow inside the shell 1 flows along the third flow path inside the shell 1 under the agitation of the upper fan 3 or the lower fan 4.

[0173] It should be noted that the specific structure of the refrigerant flow path of the air conditioner is not limited in this embodiment. In principle, the refrigerant flow path starts from the compressor, passes through the outdoor heat exchanger of the air conditioner and the indoor heat exchanger 2 of the air conditioner, and flows back to the compressor. Whether it passes through the indoor or outdoor first is determined according to the operating mode of the air conditioner. For example, when the air conditioner is in cooling mode, the refrigerant first passes through the outdoor heat exchanger and then passes through the indoor heat exchanger 2. When the air conditioner is in heating mode, the refrigerant first passes through the indoor heat exchanger 2 and then passes through the outdoor heat exchanger. In addition, structures such as expansion valves and throttle valves can also be set on the refrigerant flow path.

[0174] The upper air vent 11 and the lower air vent 12 can be selectively opened and closed, and the specific opening and closing structure is not limited in this embodiment. For ease of understanding, for example, air guide plates are respectively arranged at the upper air vent 11 and the lower air vent 12, and the air guide plates are rotatably connected to the housing 1, and driven by a motor so that the air guide plates can open or block the corresponding air vents.

[0175] The air inlet channel 13 is formed inside the housing 1 and between the upper air port 11 and the indoor heat exchanger 2, and between the lower air port 12 and the indoor heat exchanger 2. In one embodiment, the air inlet channel 13 includes an air inlet channel 1 and an air inlet channel 2, wherein the air inlet channel 1 is between the upper air port 11 and the indoor heat exchanger 2, and the air inlet channel 2 is between the lower air port 12 and the indoor heat exchanger 2, and the air inlet channel 1 and the air inlet channel 2 may not be connected.

[0176] In one embodiment, the air inlet channel 13 is formed by the shape of the housing 1, that is, a plate-like structure may be provided inside the housing 1, and the entire internal space of the housing 1 is divided into a plurality of spaces by the plate-like structure, including the air inlet channel 13 connecting the upper air port 11 with the first side of the indoor heat exchanger 2 and connecting the lower air port 12 with the first side of the indoor heat exchanger 2. In addition, a tubular structure may also be installed inside the housing 1, so that the internal space of the tubular structure forms the air inlet channel 13.

[0177] The upper fan 3 is provided with a fan blade in the axial direction, and one end of the fan blade is provided with a first axial positive air outlet 33. The first air outlet 31 and the second air outlet 32 ​​are formed in the radial direction of the upper fan 3, that is, on the outer peripheral side of the upper fan 3. The first air outlet 31 and the second air outlet 32 ​​may be located on the same radial straight line of the upper fan 3, or may not be located on the same radial straight line.

[0178] Similar to the air inlet duct 13, the first upper ventilation duct 14, the second upper ventilation duct 15, the first lower ventilation duct 16, the second lower ventilation duct 17 and the middle ventilation duct 18 can all be divided by the shape of the outer shell 1, for example, by a plate structure in the outer shell 1, or by a tubular structure in the outer shell 1, and this embodiment does not make any specific limitation on this.

[0179] In one embodiment, the first blocking mechanism 5 and the second blocking mechanism 6 can be the same mechanism, but the positions are different, which leads to different functions. Specifically, taking the first blocking mechanism 5 as an example, the first blocking mechanism 5 can be a valve or a plate-like structure, as long as it can block the ventilation channel. For example, a rotatable plate is set at the connection between the first upper ventilation channel 14 and the second upper ventilation channel 15. When the plate rotates into the first upper ventilation channel 14, the first upper ventilation channel 14 is blocked, and the second upper ventilation channel 15 is connected; when the plate rotates into the second upper ventilation channel 15, the second upper ventilation channel 15 is blocked, and the first upper ventilation channel 14 is connected.

[0180] The third flow path connects the upper fan 3, the middle ventilation flow channel 18 and the lower fan 4, so that the airflow inside the housing 1 can circulate between the upper fan 3, the middle ventilation flow channel 18 and the lower fan 4 without flowing out of the housing 1. For example, the first blocking mechanism 5 blocks both the first upper ventilation flow channel 14 and the second upper ventilation flow channel 15, and the second blocking mechanism 6 blocks both the first lower ventilation flow channel 16 and the second lower ventilation flow channel 17, so that the upper air outlet 11 and the lower air outlet 12 cannot be connected with the upper fan 3 and the lower fan 4, and the third flow path can be formed.

[0181] Through the above content, the air conditioner includes an upper fan 3 and a lower fan 4, and a third flow path can be formed between the upper fan 3 and the lower fan 4 through the action of the first blocking mechanism 5 and the second blocking mechanism 6, so that when the condensed water in the outer shell 1 needs to be dried, the air flow inside the outer shell 1 flows in the internal circulation flow channel, which neither flows to the outside of the outer shell 1 to affect the temperature of the space where the air conditioner is located, nor can it dry the condensed water, making it difficult for bacteria to grow inside the air conditioner due to the condensed water, and it is not easy to have odor when the air conditioner is used next time, thereby improving the use experience of the air conditioner.

[0182] In another embodiment of the present application, the first blocking mechanism 5 includes a first volute tongue 51 and a first baffle 52;

[0183] The first volute tongue 51 is slidably disposed on the upper fan 3 for selectively blocking any one of the first air outlet 31 and the second air outlet 32 ​​, and when the first volute tongue 51 blocks the first air outlet 31 , the second air outlet 32 ​​is connected to both the second upper ventilation channel 15 and the middle ventilation channel 18 .

[0184] When the first volute tongue 51 blocks the second air outlet 32 ​​, the first air outlet 31 is communicated with the first upper ventilation channel 14 .

[0185] The first baffle 52 is rotatably disposed on the side wall of the second upper ventilation channel 15 and is located between the second air port 32 and the upper air port 11. When the first baffle 52 is in an open state, the second air port 32 is connected to the upper air port 11 to make the second upper ventilation channel 15 conductive.

[0186] When the first baffle 52 is in the closed state, the flow passage between the second air port 32 and the upper air port 11 is blocked, so that the second upper ventilation flow passage 15 is blocked.

[0187] In one embodiment, both the first volute tongue 51 and the first baffle plate 52 can be rotationally controlled by connecting a driver.

[0188] Through the above content, the first volute tongue 51 and the first baffle 52 are used to block the first upper ventilation channel 14 and / or the second upper ventilation channel 15, so that the blocking conditions of the first upper ventilation channel 14 and the second upper ventilation channel 15 can be controlled separately, thereby improving flexibility.

[0189] In another embodiment of the present application, the second blocking mechanism 6 includes a second volute tongue 61 and a second baffle 62;

[0190] The second volute tongue 61 is slidably disposed on the lower fan 4 to selectively block any one of the third air port 41 and the fourth air port 42. When the second volute tongue 61 blocks the third air port 41, the fourth air port 42 is communicated with the first lower ventilation channel 16.

[0191] When the second volute tongue 61 blocks the fourth air port 42 , the third air port 41 is in communication with both the second lower ventilation channel 17 and the middle ventilation channel 18 .

[0192] The second baffle 62 is rotatably disposed on the side wall of the second lower ventilation channel 17 and is located between the third air port 41 and the lower air port 12. When the second baffle 62 is in an open state, the third air port 41 is connected to the lower air port 12 to make the second lower ventilation channel 17 conductive.

[0193] When the second baffle 62 is in the closed state, the flow passage between the third air port 41 and the lower air port 12 is blocked, so that the second lower ventilation flow passage 17 is blocked.

[0194] In one embodiment, the second volute tongue 61 and the second baffle 62 can both be connected to a driver to achieve rotation control.

[0195] Through the above content, the second volute tongue 61 and the second baffle 62 are used to block the first lower ventilation channel 16 and / or the second lower ventilation channel 17, so that the blocking conditions of the first lower ventilation channel 16 and the second lower ventilation channel 17 can be controlled separately, thereby improving flexibility.

[0196] In another embodiment of the present application, Figure 3-4 As shown, when the air conditioner is in cooling mode, the first volute tongue 51 blocks the second air outlet 32, the first baffle 52 is in an open state, the second volute tongue 61 blocks the fourth air outlet 42, and the second baffle 62 is in a closed state, so as to form a first flow path 9 in the housing 1, so that the airflow entering the lower air outlet 12 flows along the first flow path 9. The path includes:

[0197] The air flow enters the indoor heat exchanger 2 through the air inlet duct 13, and then enters the first axial positive air port 33 of the upper fan 3 and the second axial positive air port 43 of the lower fan 4 respectively. The air flow entering the first axial positive air port 33 flows from the first air port 31 through the first upper ventilation duct 14 to the upper air port 11, and the air flow entering the second axial positive air port 43 flows from the third air port 41 through the middle ventilation duct 18 and the second upper ventilation duct 15 to the upper air port 11.

[0198] When the air conditioner is in heating mode, the first volute 51 blocks the first air outlet 31, the first baffle 52 is in a closed state, the second volute 61 blocks the third air outlet 41, and the second baffle 62 is in an open state, so as to form a second flow path 10 in the housing 1, so that the airflow entering the upper air outlet 11 flows along the second flow path 10 along the path including:

[0199] The airflow enters the indoor heat exchanger 2 through the air inlet channel 13, and then enters the first axial positive air port 33 of the upper fan 3 and the second axial positive air port 43 of the lower fan 4 respectively. The airflow entering the first axial positive air port 33 flows from the second air port 32 through the middle air port 18 and the second lower air port 17 to the lower air port 12, and the airflow entering the second axial positive air port 43 flows from the fourth air port 42 through the first lower air port 16 to the lower air port 12.

[0200] like Figure 5 As shown, when the air conditioner is in the drying mode, the positions of the first volute tongue 51, the first baffle 52, the second volute tongue 61 and the second baffle 62 are the same as those in the cooling mode, the upper air outlet 11 and the lower air outlet 12 are both closed, the upper fan 3 is started, and the lower fan 4 is braked, so as to form a third flow path in the casing 1 based on the air flow path formed by the lower fan 4, so that the upper fan 3 blows the air of the third flow path from the first axial positive air outlet 33 to the first air outlet 31, and then passes through the first upper ventilation flow channel 14, the second upper ventilation flow channel 15, the middle ventilation flow channel 18, the third air outlet 41 and the second axial positive air outlet 43 in sequence, and flows in the third flow path.

[0201] In one embodiment, in the drying mode, the lower fan 4 may be started and the upper fan 3 may be braked.

[0202] Through the above content, in the drying mode, the positions of the first volute tongue 51, the first baffle 52, the second volute tongue 61 and the second baffle 62 make the length of the third flow path longer, and the airflow of the third flow path can flow near the upper air outlet 11, which helps to improve the dehumidification effect, thereby avoiding the growth of bacteria inside the air conditioner to produce odor, and improving the user experience of the air conditioner.

[0203] In another embodiment of the present application, an upper vent 7 that can be selectively opened and closed is provided in the air inlet passage 13 between the upper air port 11 and the indoor heat exchanger 2, and a lower vent 8 that can be selectively opened and closed is provided in the air inlet passage 13 between the lower air port 12 and the indoor heat exchanger 2.

[0204] In one embodiment, grille plates connected to the housing 1 are respectively disposed at the upper vent 7 and the lower vent 8. The grille plates can be driven to rotate, thereby blocking or opening the corresponding vent.

[0205] Through the above content, by providing the upper vents 7 and the lower vents 8 that can be selectively opened and closed, it is easy to control the air volume, thereby improving the use flexibility and user experience of the air conditioner.

[0206] In another embodiment of the present application, the upper fan 3 further includes a first axial reverse air port 34, and a first flow path 9 is formed in the housing 1 to connect the second side of the indoor heat exchanger 2 with the first axial reverse air port 34, so that after the upper fan 3 is started, the airflow passing through the indoor heat exchanger 2 enters the upper fan 3 from the first axial positive air port 33 and from the first axial reverse air port 34 through the first flow path 9 respectively;

[0207] The down fan 4 also includes a second axial reverse air port 44, and a second flow path 10 is formed in the outer shell 1 to connect the second side of the indoor heat exchanger 2 with the second axial reverse air port 44, so that after the down fan 4 is started, the air flow passing through the indoor heat exchanger 2 enters the down fan 4 from the second axial positive air port 43 and from the second axial reverse air port 44 through the second flow path 10.

[0208] In one embodiment, air outlets are provided at both axial ends of the upper fan 3 and the lower fan 4, which is beneficial to increasing the air flow processing capacity of the upper fan 3 and the lower fan 4, thereby increasing the gas processing capacity of the air conditioner, so that the air conditioner can output a larger amount of air flow, thereby improving the cooling and heating efficiency of the air conditioner.

[0209] For ease of understanding, Figure 7-9 As shown, a system control method for drying the air duct after refrigeration is provided. By identifying the temperature and humidity parameters in the room, different control methods are selected according to the change of relative humidity to ensure optimal control of the duct drying, solve the problem that condensed water is prone to generate odor after refrigeration operation, improve the air quality, and improve the cleanliness of the air.

[0210] ①. Obtain the operating parameters of the air conditioner, including the outlet temperature, indoor air temperature, relative humidity (that is, the humidity in the room), compressor operating frequency f, external fan and other load operating status.

[0211] ②. When it is detected that the indoor temperature reaches the set temperature, the cooling mode will be exited and the drying mode will be switched.

[0212] ③. When entering the drying mode, the compressor operating frequency f runs to the first target frequency.

[0213] ④. The lower fan is turned off, the upper fan speed is adjusted to the first target speed, and the motion mechanism position in the drying mode is executed.

[0214] ⑤. Choose to execute the first drying mode (that is, the first drying strategy) or the second drying mode (that is, the second drying strategy) according to the change in the relative humidity of the room.

[0215] ⑥. When the relative humidity is less than RH70%, the first drying mode is executed. When the outlet air temperature is not lower than the indoor temperature and the running time is greater than the first preset time, the first drying mode is exited. When the relative humidity is ≥ RH70%, the second drying mode is executed. When the outlet air temperature is not lower than the indoor temperature and the running time is greater than the second preset time, the second drying mode is exited. Among them, the outlet air temperature detection point is set on the inner wall of the upper air outlet, located inside the air conditioner. When the drying mode is executed, there is air circulation inside, and the internal air flow temperature can be detected. When the normal cooling and heating operation is performed, the outlet air temperature is detected.

[0216] When the indoor relative humidity is low, the condensed water generated by the air conditioner during cooling operation is less. The air duct drying can be completed in a short time by adjusting the refrigerant temperature and flow rate during cooling operation. If the indoor relative humidity is high, the condensed water generated during cooling operation is more, and the latent heat required for the evaporation of the condensed water is larger. Relying solely on the first drying mode will result in insufficient drying heat and a too long drying time. Therefore, the second drying mode is selected, and the second preset time is greater than the first preset time.

[0217] The first drying mode is controlled as follows:

[0218] The compressor runs to the first target frequency, and the operating frequency f is adjusted to ensure that the exhaust temperature is higher than the indoor air temperature. Then the outdoor fan is turned off, and the opening of the electronic expansion valve is increased to allow the higher temperature refrigerant to enter the indoor heat exchanger 2. The internal circulating air is dried in the air duct after heat exchange in the heat exchanger.

[0219] The second drying mode is controlled as follows:

[0220] The compressor runs to the first target frequency, the four-way valve is energized, and the compressor switches to heating operation without stopping. The operating frequency f is adjusted to ensure that the exhaust temperature is higher than the indoor air temperature. The higher temperature refrigerant directly enters the indoor heat exchanger 2, and the internal circulating air is dried in the air duct after heat exchange in the heat exchanger.

[0221] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0222] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0223] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0224] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0225] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0226] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store program code.

[0227] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A self-cleaning control method for an air conditioner, characterized in that: The air conditioner is provided with an upper air port (11), a lower air port (12), and an air duct connected to the upper air port (11) and the lower air port (12), and an indoor heat exchanger (2), a flow path control mechanism, an upper fan (3), and a lower fan (4) arranged on the air duct, wherein: The upper fan (3) is arranged corresponding to the upper air outlet (11), and the lower fan (4) is arranged corresponding to the lower air outlet (12); The air conditioner is provided with a cooling mode, a heating mode and a drying mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner; When the air conditioner is in the cooling mode, the flow path control mechanism controls the air duct to form a first flow path (9) inside the air conditioner that connects the upper air port (11) and the lower air port (12), and at least one of the upper fan (3) and the lower fan (4) provides power for the airflow to flow from the lower air port (12) to the upper air port (11) in the first flow path (9); When the air conditioner is in the heating mode, the flow path control mechanism controls the air duct to form a second flow path (10) inside the air conditioner that connects the upper air port (11) and the lower air port (12), and at least one of the upper fan (3) and the lower fan (4) provides power for the airflow to flow from the upper air port (11) to the lower air port (12) in the second flow path (10); The air conditioner further comprises a housing (1), the upper fan (3) comprises a first air outlet (31), a second air outlet (32) and a first axial positive air outlet (33), and the lower fan (4) comprises a third air outlet (41), a fourth air outlet (42) and a second axial positive air outlet (43); A first upper ventilation flow channel (14) is formed inside the housing (1) and is located between the first air outlet (31) and the upper air outlet (11); A second upper ventilation channel (15) is formed inside the housing (1) and is located between the second air outlet (32) and the upper air outlet (11); A first lower ventilation flow channel (16) is formed inside the housing (1) and is located between the fourth air outlet (42) and the lower air outlet (12); A second lower ventilation flow channel (17) is formed inside the housing (1) and is located between the third air outlet (41) and the lower air outlet (12); A central air flow passage (18) located between the second air outlet (32) and the third air outlet (41) is formed inside the housing (1); The flow path control mechanism comprises a first blocking mechanism (5) for selectively opening and closing the first upper ventilation flow channel (14) and / or the second upper ventilation flow channel (15); The flow path control mechanism comprises a second blocking mechanism (6) for selectively opening and closing the first lower ventilation flow channel (16) and / or the second lower ventilation flow channel (17); The first blocking mechanism (5) and the second blocking mechanism (6) are capable of forming a third flow path between the upper fan (3), the middle air flow passage (18) and the lower fan (4), so that the airflow inside the housing (1) flows along the third flow path inside the housing (1) under the agitation of the upper fan (3) or the lower fan (4); The self-cleaning control method comprises: Control the air conditioner to switch to drying mode after the cooling operation ends; Controlling the operation of the flow path control mechanism and the opening of one of the upper fan (3) and the lower fan (4) to form the third flow path of a closed cycle in the air duct; Acquire environmental parameters of the indoor space where the air conditioner is located; A drying strategy for executing the drying mode is selected according to the humidity condition of the indoor space represented by the environmental parameters, wherein the drying strategy includes selecting a corresponding compressor operating frequency, an electronic expansion valve opening, and a drying time according to the humidity condition of the indoor space.

2. The self-cleaning control method of the air conditioner according to claim 1, characterized in that: The environmental parameters include a first humidity; The step of selecting a drying strategy for executing the drying mode according to the humidity of the indoor space represented by the environmental parameter comprises: If the first humidity is lower than a preset humidity threshold, a first drying strategy is executed, wherein the first drying strategy performs drying in the refrigerant flow path in the cooling mode; If the first humidity is higher than or equal to the humidity threshold, a second drying strategy is executed, wherein the second drying strategy performs drying in the refrigerant flow path in the heating mode.

3. The self-cleaning control method of the air conditioner according to claim 2, characterized in that: The refrigerant flow path in the cooling mode passes through the compressor and the electronic expansion valve, the environmental parameter includes a first temperature, and the compressor operating frequency includes a first operating frequency; The implementation of the first drying strategy includes: controlling the compressor to operate at the first operating frequency; Controlling the external fan of the air conditioner to be closed and increasing the opening of the electronic expansion valve to change the heat exchange temperature of the indoor heat exchanger (2) to change the temperature of the air flow in the third flow path; acquiring a second temperature of the airflow in the third flow path; If the second temperature satisfies a preset first exit condition, the drying mode is exited.

4. The self-cleaning control method of the air conditioner according to claim 3, characterized in that: After obtaining the second temperature of the airflow in the third flow path, the method further includes: The operating frequency of the compressor is adjusted according to the second temperature so that the second temperature reaches the first temperature.

5. The self-cleaning control method of the air conditioner according to claim 3, characterized in that: The drying time includes a first drying time; The method further comprises: If the second temperature reaches the first temperature and the first drying time of the first drying strategy reaches a preset first preset time, it is determined that the second temperature meets the first exit condition.

6. The self-cleaning control method of the air conditioner according to claim 2, characterized in that: The refrigerant flow path in the heating mode passes through the compressor and the four-way valve, the environmental parameter includes a first temperature, and the compressor operating frequency includes a second operating frequency; The implementation of the second drying strategy includes: controlling the compressor to operate at the second operating frequency; Controlling the four-way valve to be energized so that the air conditioner switches to the refrigerant flow path in the heating mode, wherein the refrigerant in the refrigerant flow path in the heating mode increases the heat exchange temperature of the indoor heat exchanger (2) to increase the temperature of the airflow in the third flow path; acquiring a second temperature of the airflow in the third flow path; adjusting the operating frequency of the compressor according to the second temperature so that the second temperature exceeds the first temperature; If the second temperature satisfies a preset second exit condition, the drying mode is exited.

7. The self-cleaning control method of the air conditioner according to claim 1, characterized in that: The self-cleaning control method further comprises: When the air conditioner ends the cooling mode, determining that the air conditioner ends the cooling operation to enter the drying mode, And / or, when the air conditioner ends the cooling stage in the self-cleaning control method, it is determined that the air conditioner ends the cooling operation to enter the drying mode.

8. An air conditioner, characterized in that: The air conditioner comprises an upper air port (11), a lower air port (12), and an air duct connected to the upper air port (11) and the lower air port (12), as well as an indoor heat exchanger (2), a flow path control mechanism, an upper fan (3), and a lower fan (4) arranged on the air duct, wherein: The upper fan (3) is arranged corresponding to the upper air outlet (11), and the lower fan (4) is arranged corresponding to the lower air outlet (12); The air conditioner is provided with a cooling mode, a heating mode and a drying mode, and the flow path control mechanism is used to control the air duct to form different flow paths under different operation modes of the air conditioner; When the air conditioner is in the cooling mode, the flow path control mechanism controls the air duct to form a first flow path (9) inside the air conditioner that connects the upper air port (11) and the lower air port (12), and at least one of the upper fan (3) and the lower fan (4) provides power for the airflow to flow from the lower air port (12) to the upper air port (11) in the first flow path (9); When the air conditioner is in the heating mode, the flow path control mechanism controls the air duct to form a second flow path (10) inside the air conditioner that connects the upper air port (11) and the lower air port (12), and at least one of the upper fan (3) and the lower fan (4) provides power for the airflow to flow from the upper air port (11) to the lower air port (12) in the second flow path (10); When the air conditioner is in the drying mode, the flow path control mechanism controls the air duct to form a third flow path of a closed circulation inside the air conditioner, the upper fan (3) or the lower fan (4) provides power for the airflow to flow in the third flow path, and the self-cleaning control method described in any one of claims 1 to 7 is adopted.

9. The air conditioner according to claim 8, characterized in that: The air conditioner also includes a housing (1) and a compressor; The indoor heat exchanger (2) is in communication with the refrigerant of the compressor; The upper air port (11) is selectively openable and closable and is arranged at the upper part of the housing (1); the lower air port (12) is selectively openable and closable and is arranged at the lower part of the housing (1); The indoor heat exchanger (2) is located in the housing (1), an air inlet channel (13) is formed between a first side of the indoor heat exchanger (2) and the upper air port (11) and the lower air port (12), and the upper fan (3) and the lower fan (4) are both located on a second side of the indoor heat exchanger (2) away from the air inlet channel (13); The upper fan (3) is arranged close to the upper air outlet (11), and the lower fan (4) is arranged close to the lower air outlet (12); The upper fan (3) comprises a first air port (31), a second air port (32) and a first axial positive air port (33); after the upper fan (3) is started, the airflow passing through the indoor heat exchanger (2) enters through the first axial positive air port (33) and flows out from the first air port (31) and / or the second air port (32); The down fan (4) comprises a third air port (41), a fourth air port (42) and a second axial positive air port (43); after the down fan (4) is started, the airflow passing through the indoor heat exchanger (2) enters from the second axial positive air port (43) and flows out from the third air port (41) and / or the fourth air port (42); A first upper ventilation flow channel (14) is formed inside the housing (1) and is located between the first air outlet (31) and the upper air outlet (11); A second upper ventilation channel (15) is formed inside the housing (1) and is located between the second air outlet (32) and the upper air outlet (11); A first lower ventilation flow channel (16) is formed inside the housing (1) and is located between the fourth air outlet (42) and the lower air outlet (12); A second lower ventilation flow channel (17) is formed inside the housing (1) and is located between the third air outlet (41) and the lower air outlet (12); A central air flow passage (18) located between the second air outlet (32) and the third air outlet (41) is formed inside the housing (1); The flow path control mechanism comprises a first blocking mechanism (5) for selectively opening and closing the first upper ventilation flow channel (14) and / or the second upper ventilation flow channel (15); The flow path control mechanism comprises a second blocking mechanism (6) for selectively opening and closing the first lower ventilation flow channel (16) and / or the second lower ventilation flow channel (17); The first blocking mechanism (5) and the second blocking mechanism (6) are capable of forming the third flow path between the upper fan (3), the middle air flow channel (18) and the lower fan (4), so that the airflow inside the housing (1) flows along the third flow path inside the housing (1) under the agitation of the upper fan (3) or the lower fan (4).

10. The air conditioner according to claim 9, characterized in that: The first blocking mechanism (5) comprises a first volute tongue (51) and a first baffle (52); The first volute tongue (51) is slidably arranged on the upper fan (3) and is used to selectively block any one of the first air outlet (31) and the second air outlet (32); when the first volute tongue (51) blocks the first air outlet (31), the second air outlet (32) is communicated with both the second upper ventilation channel (15) and the middle ventilation channel (18); when the first volute tongue (51) blocks the second air outlet (32), the first air outlet (31) is communicated with the first upper ventilation channel (14); The first baffle (52) is rotatably disposed on a side wall of the second upper ventilation channel (15) and is located between the second air port (32) and the upper air port (11); when the first baffle (52) is in an open state, the second air port (32) is connected to the upper air port (11) so that the second upper ventilation channel (15) is conducted; when the first baffle (52) is in a closed state, the channel between the second air port (32) and the upper air port (11) is blocked so that the second upper ventilation channel (15) is blocked.

11. The air conditioner according to claim 10, characterized in that: The second blocking mechanism (6) comprises a second volute tongue (61) and a second baffle (62); The second volute tongue (61) is slidably arranged on the lower fan (4) and is used to selectively block any one of the third air outlet (41) and the fourth air outlet (42); when the second volute tongue (61) blocks the third air outlet (41), the fourth air outlet (42) is connected to the first lower ventilation channel (16); when the second volute tongue (61) blocks the fourth air outlet (42), the third air outlet (41) is connected to both the second lower ventilation channel (17) and the middle ventilation channel (18); The second baffle (62) is rotatably disposed on a side wall of the second lower ventilation channel (17) and is located between the third air port (41) and the lower air port (12); when the second baffle (62) is in an open state, the third air port (41) is connected to the lower air port (12) so that the second lower ventilation channel (17) is conducted; when the second baffle (62) is in a closed state, the channel between the third air port (41) and the lower air port (12) is blocked so that the second lower ventilation channel (17) is blocked.

12. The air conditioner according to claim 11, characterized in that: When the air conditioner is in the cooling mode, the first volute tongue (51) blocks the second air outlet (32), the first baffle (52) is in an open state, the second volute tongue (61) blocks the fourth air outlet (42), and the second baffle (62) is in a closed state, so as to form the first flow path (9) in the housing (1), so that the airflow entering from the lower air outlet (12) flows along the first flow path (9) along a path including: The airflow passes through the air inlet duct (13) and enters the indoor heat exchanger (2), and then respectively enters the first axial positive air port (33) of the upper fan (3) and the second axial positive air port (43) of the lower fan (4); the airflow entering the first axial positive air port (33) flows from the first air port (31) through the first upper ventilation duct (14) to the upper air port (11); the airflow entering the second axial positive air port (43) flows from the third air port (41) through the middle ventilation duct (18) and the second upper ventilation duct (15) to the upper air port (11); When the air conditioner is in a heating mode, the first volute tongue (51) blocks the first air outlet (31), the first baffle (52) is in a closed state, the second volute tongue (61) blocks the third air outlet (41), and the second baffle (62) is in an open state, so as to form the second flow path (10) in the housing (1), so that the airflow entering the upper air outlet (11) flows along the second flow path (10) along a path including: The airflow passes through the air inlet duct (13) and enters the indoor heat exchanger (2), and then respectively enters the first axial positive air port (33) of the upper fan (3) and the second axial positive air port (43) of the lower fan (4); the airflow entering the first axial positive air port (33) flows from the second air port (32) through the middle air port (18) and the second lower air port (17) to the lower air port (12); the airflow entering the second axial positive air port (43) flows from the fourth air port (42) through the first lower air port (16) to the lower air port (12); When the air conditioner is in a drying mode, the positions of the first volute tongue (51), the first baffle (52), the second volute tongue (61) and the second baffle (62) are the same as those in the cooling mode, the upper air outlet (11) and the lower air outlet (12) are both closed, the upper fan (3) is started, and the lower fan (4) is braked, so as to form the third flow path in the housing (1) based on the air flow path formed by the lower fan (4), so that the upper fan (3) blows the air of the third flow path from the first axial positive air outlet (33) to the first air outlet (31), and then passes through the first upper ventilation flow channel (14), the second upper ventilation flow channel (15), the middle ventilation flow channel (18), the third air outlet (41) and the second axial positive air outlet (43) in sequence, and flows in the third flow path.

13. The air conditioner according to claim 9, characterized in that: An upper vent (7) that can be selectively opened and closed is provided in the air inlet passage (13) between the upper air port (11) and the indoor heat exchanger (2), and a lower vent (8) that can be selectively opened and closed is provided in the air inlet passage (13) between the lower air port (12) and the indoor heat exchanger (2).

14. The air conditioner according to claim 9, characterized in that: The upper fan (3) further comprises a first axial reverse air port (34), and a first flow path (9) is formed in the housing (1) to connect the second side of the indoor heat exchanger (2) with the first axial reverse air port (34), so that after the upper fan (3) is started, the airflow passing through the indoor heat exchanger (2) enters the upper fan (3) from the first axial positive air port (33) and from the first axial reverse air port (34) through the first flow path (9); The down fan (4) further comprises a second axial reverse air port (44), and a second flow path (10) is formed in the casing (1) for connecting the second side of the indoor heat exchanger (2) with the second axial reverse air port (44), so that after the down fan (4) is started, the airflow passing through the indoor heat exchanger (2) enters the down fan (4) from the second axial positive air port (43) and from the second axial reverse air port (44) through the second flow path (10).

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