Air conditioner and control method and device thereof, storage medium and computer program product

Abstract

The invention discloses an air conditioner and a control method and device thereof, a storage medium and a computer program product, and the method comprises the steps that after the air conditioner is powered on, whether a water pan needs to be self-cleaned or not is determined according to the pollution degree of the water pan; if it is determined that self-cleaning needs to be conducted on the water receiving disc, a preset self-cleaning program is executed, so that the freezing function is controlled by combining the indoor environment temperature and the indoor environment relative humidity of the air conditioner and the freezing surface temperature of an indoor heat exchanger, and at least one of the rotating speed of an indoor fan and the frequency of a compressor is controlled; condensate water generated by the fins at the freezing function position in the indoor heat exchanger is gathered into the water channel of the water pan to be frozen and defrosted, and self-cleaning of the water pan is achieved. According to the scheme, the condensate water is generated through the freezing function of the indoor heat exchanger of the air conditioner, enters the water pan and is frosted, defrosted and dried to achieve self-cleaning, smudginess and peculiar smell of a water channel are avoided, and human health is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and specifically relates to a control method, device, air conditioner, storage medium and computer program product for an air conditioner, and more particularly to a water channel self-cleaning control method, device, air conditioner, storage medium and computer program product for an air conditioner. Background Art

[0002] During the operation of the air conditioner, condensed water is generated, which is collected in the water pan (also called the water channel) and then discharged to the outside through the drain pipe. As the use time increases, a large amount of dust and pollutants will inevitably accumulate inside the water channel. At the same time, it is in a humid and warm environment suitable for the growth of bacteria and mold. The large-scale reproduction of bacteria and mold affects the quality of indoor air on the one hand, and on the other hand, the presence of these microorganisms will secrete a kind of mucus in the air conditioner environment. Like an adhesive, it will adhere to dust, particles and other substances to form a sticky sediment that adheres to the surface of the water channel, affecting the normal use of the air conditioner. The industry calls it biological slime. Figure 7 shown. Figure 7 The current status of biological slime pollution in the waterway of the air conditioner, where (a) is the current status Figure 1 , (b) is the current situation Figure 2 .

[0003] Dust accumulation and the growth of bacteria and other microorganisms are key contributors to these problems. Due to the narrow structure of the waterway, it's difficult to remove dust and other contaminants through external force unless the unit is disassembled. Disassembly for cleaning is clearly uneconomical and impractical. Therefore, the proposed solution primarily involves antibacterial treatment of the air conditioner's waterway to inhibit microbial growth and thereby control waterway contamination. However, the proposed antibacterial waterway treatments fail to address the issue of dirty and odorous air conditioner waterways, and are therefore detrimental to human health.

[0004] The above content is only used to assist in understanding the technical solution of the present invention and does not mean that the above content is recognized as the technology in the related solution. Summary of the Invention

[0005] The object of the present invention is to provide a control method, device, air conditioner, storage medium and computer program product for an air conditioner, so as to solve the problem that the antibacterial water channel of the air conditioner cannot solve the problem that the water channel of the air conditioner is dirty and has an odor, which is not conducive to human health. The purpose ... is dirty and has an odor, which is not conducive to human health. The purpose of the present invention is to provide a control method, device, air conditioner, storage medium and computer program product for an air conditioner, so as to solve the problem that the antibacterial water channel of the air conditioner cannot solve the problem that the water channel is dirty and has an odor, which is not conducive to human health.

[0006] The present invention provides a control method for an air conditioner, wherein the air conditioner has an outdoor unit and an indoor unit, the outdoor unit has a compressor, and the indoor unit has an indoor heat exchanger, an indoor fan and a water receiving pan; the refrigerant flow path of the indoor heat exchanger has a heat exchange function and a freezing function, the heat exchange capacity of the freezing function is greater than the heat exchange capacity of the heat exchange function, and the condensed water generated by the fins at the freezing function in the indoor heat exchanger can be gathered into the water channel of the water receiving pan and frozen and defrosted and dried; the control method of the air conditioner comprises: after the air conditioner is powered on and the self-cleaning function for self-cleaning the water receiving pan is turned on, obtaining the pollution degree of the water receiving pan, obtaining the indoor ambient temperature of the air conditioner, obtaining the indoor ambient temperature of the air conditioner relative humidity; and, obtaining the temperature at the freezing function in the indoor heat exchanger, recorded as the freezing surface temperature of the indoor heat exchanger; determining whether the water receiving pan needs to be self-cleaned according to the degree of contamination of the water receiving pan; if it is determined that the water receiving pan needs to be self-cleaned, executing a preset self-cleaning program to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is gathered into the water channel of the water receiving pan and is frozen and defrosted and dried, thereby realizing self-cleaning of the water receiving pan.

[0007] In some embodiments, the indoor unit further has a first three-way diverter device, a second three-way diverter device, and a four-way reversing device; the copper tube of the indoor heat exchanger has a refrigerant inlet pipe, a refrigerant outlet pipe and a refrigerant main pipe; wherein, the first three-way diverter device is arranged at the connection between the refrigerant main pipe and the refrigerant outlet pipe; the second three-way diverter device is arranged at the connection between the refrigerant inlet pipe and the refrigerant main pipe; the four-way reversing device is arranged between the refrigerant inlet pipe and the refrigerant outlet pipe; the heat exchange area where the refrigerant main pipe is located includes: a first heat exchange area, a second heat exchange area and a third heat exchange area; the first heat exchange area and the third heat exchange area are located on both sides of the second heat exchange area; by controlling the first three-way diverter device, the second three-way diverter device, and the four-way reversing device, it is possible to control whether the refrigerant flow path corresponding to the corresponding heat exchange area in the first heat exchange area, the second heat exchange area and the third heat exchange area belongs to the heat exchange function or the freezing function.

[0008] In some embodiments, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in series and used together; and the fins at the freezing function in the indoor heat exchanger extend into the water channel of the water receiving pan; or, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in parallel and used independently of each other, and the freezing function extends into the water channel of the water receiving pan.

[0009] In some embodiments, the fin at the freezing function in the indoor heat exchanger has an extension structure that is shaped like the water channel of the water receiving pan, and the extension structure can extend into the water channel of the water receiving pan.

[0010] In some embodiments, a preset self-cleaning program is executed to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the rotation speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is gathered into the water channel of the water receiving tray and is frozen and defrosted and dried, thereby achieving self-cleaning of the water receiving tray, including: executing a preset condensation process under a preset self-cleaning program: controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, so that the condensed water generated by the fins at the freezing function is gathered into the water channel of the water receiving tray and is frozen and defrosted and dried, thereby achieving self-cleaning of the water receiving tray. The air conditioner can be controlled to turn off the cooling mode and turn on the heating mode, and according to the freezing surface temperature of the indoor heat exchanger, control the rotation speed of the indoor fan and at least one of the frequency of the compressor to defrost the surface of the fins at the freezing function in the indoor heat exchanger, and then the frost layer frozen in the water channel of the water receiving pan is melted and dried, and then exit the preset self-cleaning program to complete the self-cleaning of the water receiving pan.

[0011] In some embodiments, according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, at least one of the speed of the indoor fan and the frequency of the compressor is controlled to make the condensed water generated by the fins at the freezing function part, including: determining the surface condensation temperature of the indoor heat exchanger according to the indoor ambient temperature of the air conditioner and the indoor ambient relative humidity of the air conditioner; reducing the speed of the indoor fan, and / or increasing the frequency of the compressor, so that the freezing surface temperature of the indoor heat exchanger is less than or equal to the surface condensation temperature of the indoor heat exchanger; maintaining the set condensation time to make the condensed water generated by the fins at the freezing function part.

[0012] In some embodiments, according to the freezing surface temperature of the indoor heat exchanger, at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled to frost the surface of the fin at the freezing function in the indoor heat exchanger, thereby freezing the condensed water gathered in the water channel of the water receiving pan, including: determining the corrected temperature of the indoor heat exchanger; turning off the indoor fan or reducing the rotation speed of the indoor fan, and / or increasing the frequency of the compressor, so that the sum of the freezing surface temperature of the indoor heat exchanger and the corrected temperature of the indoor heat exchanger is within the error range of the set frosting target temperature of the indoor heat exchanger; maintaining the set frosting time, so that the surface of the fin at the freezing function in the indoor heat exchanger is frosted, thereby freezing the condensed water gathered in the water channel of the water receiving pan.

[0013] In some embodiments, the air conditioner is controlled to turn off the cooling mode and turn on the heating mode, and according to the frozen surface temperature of the indoor heat exchanger, at least one of the speed of the indoor fan and the frequency of the compressor is controlled to defrost the surface of the fins at the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving pan, including: reducing the speed of the indoor fan, and / or increasing the frequency of the compressor, so that the frozen surface temperature of the indoor heat exchanger is within the error range of the set defrost target temperature of the indoor heat exchanger; maintaining the set defrost time, so that the surface of the fins at the freezing function in the indoor heat exchanger is defrosted, thereby melting and drying the frost layer frozen in the water channel of the water receiving pan.

[0014] In accordance with another aspect of the present invention, the air conditioner is provided with an outdoor unit and an indoor unit, wherein the outdoor unit has a compressor, and the indoor unit has an indoor heat exchanger, an indoor fan and a water collecting pan; the refrigerant flow path of the indoor heat exchanger has a heat exchange function and a freezing function, the heat exchange capacity of the freezing function is greater than the heat exchange capacity of the heat exchange function, and the condensed water generated by the fins at the freezing function in the indoor heat exchanger can be gathered into the water channel of the water collecting pan and frozen and defrosted and dried; the air conditioner control device comprises: an acquisition unit configured to acquire the degree of contamination of the water collecting pan, the indoor ambient temperature of the air conditioner, and the indoor environment of the air conditioner after the air conditioner is powered on and the self-cleaning function for self-cleaning the water collecting pan is turned on. relative humidity; and, obtaining the temperature at the freezing function in the indoor heat exchanger, recorded as the freezing surface temperature of the indoor heat exchanger; a control unit is configured to determine whether the water receiving pan needs to be self-cleaned according to the degree of contamination of the water receiving pan; the control unit is also configured to execute a preset self-cleaning program if it is determined that the water receiving pan needs to be self-cleaned, so as to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is gathered into the water channel of the water receiving pan and is frozen and defrosted and dried, thereby realizing self-cleaning of the water receiving pan.

[0015] In some embodiments, the indoor unit further has a first three-way diverter device, a second three-way diverter device, and a four-way reversing device; the copper tube of the indoor heat exchanger has a refrigerant inlet pipe, a refrigerant outlet pipe and a refrigerant main pipe; wherein, the first three-way diverter device is arranged at the connection between the refrigerant main pipe and the refrigerant outlet pipe; the second three-way diverter device is arranged at the connection between the refrigerant inlet pipe and the refrigerant main pipe; the four-way reversing device is arranged between the refrigerant inlet pipe and the refrigerant outlet pipe; the heat exchange area where the refrigerant main pipe is located includes: a first heat exchange area, a second heat exchange area and a third heat exchange area; the first heat exchange area and the third heat exchange area are located on both sides of the second heat exchange area; by controlling the first three-way diverter device, the second three-way diverter device, and the four-way reversing device, it is possible to control whether the refrigerant flow path corresponding to the corresponding heat exchange area in the first heat exchange area, the second heat exchange area and the third heat exchange area belongs to the heat exchange function or the freezing function.

[0016] In some embodiments, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in series and used together; and the fins at the freezing function in the indoor heat exchanger extend into the water channel of the water receiving pan; or, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in parallel and used independently of each other, and the freezing function extends into the water channel of the water receiving pan.

[0017] In some embodiments, the fin at the freezing function in the indoor heat exchanger has an extension structure that is shaped like the water channel of the water receiving pan, and the extension structure can extend into the water channel of the water receiving pan.

[0018] In some embodiments, the control unit executes a preset self-cleaning program to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the rotation speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is gathered into the water channel of the water receiving tray and is frozen and defrosted and dried, thereby realizing self-cleaning of the water receiving tray, including: executing a preset condensation process under a preset self-cleaning program: controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, so that the condensed water generated by the fins at the freezing function is gathered into the water channel of the water receiving tray and is frozen and defrosted and dried, thereby realizing self-cleaning of the water receiving tray. a freezing function to allow the condensed water generated by the fins at the freezing function in the indoor heat exchanger to converge into the water channel of the water receiving pan; executing a preset frosting process: according to the freezing surface temperature of the indoor heat exchanger, controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to frost the surface of the fins at the freezing function in the indoor heat exchanger, thereby freezing the condensed water gathered in the water channel of the water receiving pan; executing a preset defrosting and drying process: controlling the air conditioner to turn off the cooling mode and turn on the heating mode, according to the freezing surface temperature of the indoor heat exchanger, controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to defrost the surface of the fins at the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving pan, and then exiting the preset self-cleaning program to complete the self-cleaning of the water receiving pan.

[0019] In some embodiments, the control unit controls at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, so that the condensed water generated by the fins at the freezing function includes: determining the surface condensation temperature of the indoor heat exchanger according to the indoor ambient temperature of the air conditioner and the indoor ambient relative humidity of the air conditioner; reducing the rotation speed of the indoor fan, and / or increasing the frequency of the compressor, so that the freezing surface temperature of the indoor heat exchanger is less than or equal to the surface condensation temperature of the indoor heat exchanger; maintaining the set condensation time to generate condensed water on the fins at the freezing function.

[0020] In some embodiments, the control unit controls at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the freezing surface temperature of the indoor heat exchanger, so that the fin surface at the freezing function in the indoor heat exchanger is frosted, thereby freezing the condensed water gathered in the water channel of the water receiving pan, including: determining the corrected temperature of the indoor heat exchanger; turning off the indoor fan or reducing the rotation speed of the indoor fan, and / or increasing the frequency of the compressor, so that the sum of the freezing surface temperature of the indoor heat exchanger and the corrected temperature of the indoor heat exchanger is within the error range of the set frosting target temperature of the indoor heat exchanger; maintaining the set frosting time, so that the fin surface at the freezing function in the indoor heat exchanger is frosted, thereby freezing the condensed water gathered in the water channel of the water receiving pan.

[0021] In some embodiments, the control unit controls the air conditioner to turn off the cooling mode and turn on the heating mode, and controls at least one of the speed of the indoor fan and the frequency of the compressor according to the frozen surface temperature of the indoor heat exchanger to defrost the surface of the fins at the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving pan, including: reducing the speed of the indoor fan, and / or increasing the frequency of the compressor, so that the frozen surface temperature of the indoor heat exchanger is within the error range of the set defrost target temperature of the indoor heat exchanger; maintaining the set defrost time to defrost the surface of the fins at the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving pan.

[0022] Matching the above device, the present invention provides an air conditioner on another aspect, comprising: the control device of the air conditioner described above.

[0023] In accordance with the above method, the present invention further provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the air conditioner control method described above.

[0024] In accordance with the above method, the present invention further provides a computer program product, comprising a computer program, which implements the steps of the above air conditioner control method when executed by a processor.

[0025] Therefore, the solution of the present invention is to make the refrigerant flow path of the indoor heat exchanger of the air conditioner have heat exchange function (i.e. conventional flow path) and freezing function, and selectively extend the fins of the freezing function to the area where the water receiving tray (such as the water receiving tray 1) is located; when the air conditioner is turned on and runs in cooling mode, it is determined whether the self-cleaning program of the air conditioner needs to be started; when the self-cleaning program of the air conditioner needs to be started, during the condensation process: the freezing function is turned on, and at least one of the speed of the indoor fan and the frequency of the compressor is adjusted to make the freezing function generate condensed water and gather it in the water receiving tray; frosting During the self-cleaning process: adjust at least one of the speed of the indoor fan and the frequency of the compressor to freeze the surface of the water channel in the water receiving pan; during the defrosting and drying process: switch from the cooling mode to the heating mode, adjust at least one of the speed of the indoor fan and the frequency of the compressor to defrost and dry the surface of the water channel; then exit the self-cleaning program: turn off the freezing function and turn on the heat exchange function; thus, by making the refrigerant flow path of the indoor heat exchanger of the air conditioner have a freezing function, utilizing the freezing function to generate condensed water into the water receiving pan, and performing frosting and defrosting and drying to achieve self-cleaning, avoid dirt and odor in the water channel, and benefit human health.

[0026] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention.

[0027] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 1 is a flow chart of an embodiment of a method for controlling an air conditioner according to the present invention;

[0029] Figure 2 A flow chart of an embodiment of the method of the present invention for controlling the freezing function and controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor;

[0030] Figure 3 A flow chart of an embodiment of the method of the present invention for controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to freeze the condensed water generated by the fins at the freezing function;

[0031] Figure 4 A flow chart of an embodiment of the method of the present invention for controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to cause frost to form on the fin surface at the freezing function in the indoor heat exchanger;

[0032] Figure 5 A flow chart of an embodiment of the method of the present invention for controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to defrost the fin surface at the freezing function in the indoor heat exchanger;

[0033] Figure 6 A schematic structural diagram of an embodiment of a control device for an air conditioner according to the present invention;

[0034] Figure 7 The current status of biological slime pollution in the waterway of the air conditioner, where (a) is the current status Figure 1 , (b) is the current situation Figure 2 ;

[0035] Figure 8 A schematic diagram of an air conditioner with a self-cleaning function for the water tray;

[0036] Figure 9 Schematic diagram of the structure of a three-way flow divider (merger) and a four-way reversing valve, where (a) is a three-way flow divider and (b) is a four-way reversing valve;

[0037] Figure 10 It is a structural schematic diagram of a variable flow path heat exchanger;

[0038] Figure 11 It is a structural diagram of the main heat exchange area of the air conditioner under different flow paths;

[0039] Figure 12 The figure is a structural diagram of a special-shaped fin and an air conditioner thereof;

[0040] Figure 13 A flow chart of a water channel self-cleaning control method for an air conditioner;

[0041] Figure 14 This is a structural diagram of a water channel self-cleaning control device for an air conditioner;

[0042] Figure 15 A schematic diagram of the structure of a heat exchanger and different flow paths of another air conditioner;

[0043] Figure 16 This is a schematic diagram of the structure of a heat exchanger and different flow paths of another air conditioner.

[0044] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0045] 1-water receiving tray; 2-fins; 3-copper tube; 4-air inlet; 5-air outlet; 6-three-way diverter; 7-evaporator; 8-internal fan; 9-four-way reversing valve; 102-acquisition unit; 104-control unit 104. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Considering that the antibacterial water channels in the air conditioner proposed in the related proposals cannot solve the problem of contaminated and odorous water channels, they are detrimental to human health. Specifically, the related proposals primarily control water channel contamination by applying antibacterial treatment to the air conditioner water channel to inhibit microbial growth. However, contact-based antibacterial methods, such as treating the surface material of the water channel, have limited effectiveness, especially when the antibacterial water channel surface is covered with contaminants. Precipitation-based antibacterial methods work by releasing antibacterial substances from residual condensed water in the water channel, but the rate of release is uncontrollable, the effect is difficult to maintain, and over time, it loses its effectiveness. Replaceable precipitation-based antibacterial modules can partially solve the problem, but replacement and installation are difficult in the narrow water channels and crowded internal structures of air conditioners. Furthermore, even if the problem of microbial contamination is solved, the presence of dust can still cause blockage and odor. In short, the related proposals cannot completely solve the problem of contaminated air conditioner water channels.

[0048] The promotion and application of self-cleaning technology for air conditioner evaporators in related proposals offers a technical solution to this problem. This technology effectively cleans the air conditioner's internal surfaces through methods such as freeze-stripping, condensation flushing, and high-temperature sterilization of the heat exchanger. The only difference is that both the dirty and clean components of the evaporator self-cleaning technology in these proposals are located within the evaporator, making it easier to achieve this effect. However, the distance between the water channel and the evaporator prevents heat from being transferred smoothly to the water channel due to air insulation, preventing the desired self-cleaning effect.

[0049] It can be seen that due to limitations such as the water channel structure, there is no better solution to the problems of dirty air conditioner water channels and bacterial growth in related solutions; the evaporator self-cleaning technology in related solutions cannot achieve the cleaning effect on the water channels.

[0050] Therefore, the solution of the present invention proposes a control method for an air conditioner, specifically a self-cleaning control method for the water channel of an air conditioner, providing a high-efficiency, long-lasting, consumable-free or even zero-cost air conditioner water channel purification solution. By reasonably extending the fins of the heat exchanger in the air conditioner to the bottom of the water channel, and then using the heat exchanger in the air conditioner to perform freeze stripping, condensation flushing and high-temperature sterilization, the self-cleaning effect of the water channel is achieved, which can better solve the problem of dirtiness of the air conditioner water channel and is beneficial to human health.

[0051] According to an embodiment of the present invention, a method for controlling an air conditioner is provided. Figure 1 The flow chart of an embodiment of the method of the present invention is shown. The air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compressor, the indoor unit comprises an indoor heat exchanger, an indoor fan and a water receiving pan; the indoor heat exchanger comprises copper tubes and fins, the copper tubes forming a refrigerant flow path of the indoor heat exchanger, the refrigerant flow path of the indoor heat exchanger has a heat exchange function and a freezing function, the heat exchange capacity of the freezing function is greater than the heat exchange capacity of the heat exchange function, the condensed water generated by the fins at the freezing function of the indoor heat exchanger can be collected in the water channel of the water receiving pan and frozen and defrosted and dried, the water receiving pan of the heat exchange function is as shown in FIG. Figure 8 The water tray 1 shown, the copper pipe is as follows Figure 8 The copper tube 3 shown has fins such as Figure 8 The fin 2 shown; in the solution of the present invention, as Figure 1 As shown, the control method of the air conditioner includes: steps S110 to S130.

[0052] At step S110, after the air conditioner is powered on and the self-cleaning function for self-cleaning the water receiving tray is turned on, the degree of contamination of the water receiving tray, the indoor ambient temperature of the air conditioner, and the indoor ambient relative humidity of the air conditioner are obtained; and the temperature of the freezing function in the indoor heat exchanger is obtained, specifically, the surface temperature of the fins at the freezing function in the indoor heat exchanger is obtained, which is recorded as the freezing surface temperature of the indoor heat exchanger.

[0053] In step S120 , it is determined whether the water receiving tray needs to be self-cleaned according to the degree of contamination of the water receiving tray.

[0054] At step S130, if it is determined that the water receiving pan needs to be self-cleaned, a preset self-cleaning program is executed to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is gathered into the water channel of the water receiving pan and frozen and defrosted and dried, thereby achieving self-cleaning of the water receiving pan.

[0055] Among them, the direction of the refrigerant in the copper tube in the indoor heat exchanger is different, because the cooling capacity required for heat exchange is mainly concentrated in the middle, which is easier to exchange heat with the air, and the cooling capacity required for freezing is mainly concentrated on both sides, which is easier to freeze; in the solution of the present invention, two flow paths of the shared copper tube are designed to adapt to different needs and achieve better results. In fact, the same flow path can also be used to take into account both heat exchange and freezing.

[0056] The solution of the present invention provides a self-cleaning control solution for the water channel of an air conditioner. The solution achieves a self-cleaning effect on the water channel by reasonably extending the fins of the heat exchanger in the air conditioner to the bottom of the water channel, and then utilizing the heat exchanger in the air conditioner to perform freeze stripping, condensation flushing and high-temperature sterilization. The main process of the solution of the present invention is freezing, directly utilizing the cooling capacity of the air conditioner, and using condensed water to perform freeze stripping of the water channel, which can effectively solve the problem of dirtiness of the water channel of the air conditioner and is beneficial to human health.

[0057] In some embodiments, the indoor unit further comprises a first three-way flow dividing device, a second three-way flow dividing device, and a four-way reversing device, wherein the first three-way flow dividing device and the second three-way flow dividing device are as follows: Figure 9 and Figure 10 The three-way diverter 6 shown, the four-way reversing device is as shown Figure 9 and Figure 10 The four-way reversing valve 9 shown in the figure; the copper tube of the indoor heat exchanger has a refrigerant inlet pipe, a refrigerant outlet pipe and a refrigerant main pipe; the refrigerant main pipe is the refrigerant pipe between the refrigerant inlet pipe and the refrigerant outlet pipe.

[0058] The first three-way flow divider is provided at the connection between the refrigerant main pipe and the refrigerant outlet pipe; the second three-way flow divider is provided at the connection between the refrigerant inlet pipe and the refrigerant main pipe; and the four-way reversing device is provided between the refrigerant inlet pipe and the refrigerant outlet pipe. The heat exchange region where the refrigerant main pipe is located includes: a first heat exchange region, a second heat exchange region, and a third heat exchange region; the first heat exchange region and the third heat exchange region are located on both sides of the second heat exchange region. By controlling the first three-way flow divider, the second three-way flow divider, and the four-way reversing device, it is possible to control whether the refrigerant flow paths corresponding to the corresponding heat exchange regions in the first heat exchange region, the second heat exchange region, and the third heat exchange region belong to the heat exchange function or the freezing function.

[0059] Specifically, when the air conditioner operates in cooling mode or heating mode, the first three-way flow dividing device, the second three-way flow dividing device, and the four-way reversing device are controlled so that the refrigerant flow paths corresponding to the first heat exchange area and the third heat exchange area are used for the heat exchange function, and the refrigerant flow path corresponding to the second heat exchange area is used for the freezing function;

[0060] When the air conditioner executes a preset self-cleaning program, by controlling the first three-way diverter device, the second three-way diverter device, and the four-way reversing device, the refrigerant flow paths corresponding to the first heat exchange area and the third heat exchange area are set to the freezing function, and the refrigerant flow path corresponding to the second heat exchange area is set to the heat exchange function.

[0061] The present invention provides a water channel self-cleaning control solution for air conditioners to solve the problems of dirty water trays and difficulty in cleaning in related solutions. Figures 8 to 12 As shown, the solution of the present invention first provides a heat exchanger in an air conditioner. Figure 8 This is a schematic diagram of an air conditioner with a self-cleaning function for the water tray. Figure 8As shown, the air conditioner includes an indoor unit and an outdoor unit. The indoor unit has an air inlet 4, an internal fan 8, and an air outlet 5. The air duct connecting the air inlet 4 and the air outlet 5 contains a water collection tray 1 and an environmental parameter detection device (such as a temperature and humidity sensor). The outdoor unit includes components such as a compressor, an external fan, and a condenser. The environmental parameter detection device comprises an air quality detection unit and an air temperature and humidity detection unit. The air quality detection unit is used to detect indoor air quality and may include a PM2.5 sensor, a microbial sensor, etc. The air temperature and humidity detection unit is used to detect indoor ambient temperature and humidity and may include a temperature sensor, a humidity sensor, or a temperature and humidity sensor. An evaporator 7 is mounted above the water collection tray 1. The evaporator 7 has a copper tube 3 and fins 2. When the air conditioner is in cooling mode, condensed water is generated by the evaporator 7. This condensed water flows down the fins 2 of the evaporator 7 and converges into the water collection tray 1. The condensed water flows from the upper portion of the water collection tray 1 to the lower portion of the water collection tray 1, and is finally discharged to the outside through the drain nozzle and the air conditioner's drain pipe. Optionally, the drain nozzle has a controllable opening and closing valve, and the opening and closing of the valve can control the flow of condensed water in the water receiving tray 1 .

[0062] Figure 9 The diagram is a schematic diagram of the structure of a three-way flow divider (merger) and a four-way reversing valve, wherein (a) is a three-way flow divider and (b) is a four-way reversing valve. Figure 9 As shown, a heat exchanger, such as an evaporator 7, includes a three-way flow divider (merger) 6 and a four-way reversing valve 9. The three-way flow divider 6 has valve ports A, B, and C; the four-way reversing valve 9 has valve ports A, B, C, and D. The three-way flow divider 6 can divide and merge the refrigerant flow, while the four-way reversing valve 9 can control the flow of different channels to adjust the direction of the refrigerant flow.

[0063] In the related schemes, a four-way reversing valve 9 is generally not specially provided in the heat exchanger. In the scheme of the present invention, a three-way flow divider (merger) 6 and a four-way reversing valve 9 are provided in the heat exchanger to adjust the flow path of the refrigerant to achieve control of the main heat exchange area. As described in the scheme of the present invention, the goal of a normal air conditioner is cooling or heating, so the main heat exchange area is generally controlled in the middle of the entire heat exchanger. However, the scheme of the present invention requires a freezing effect. When freezing is required, the refrigerant flow direction needs to be controlled so that the heat exchange area is controlled in the contact area with the water channel on both sides. In this way, the cooling capacity is maximized, the temperature is lower, and it is easier to freeze. Of course, in theory, valves such as the three-way flow divider (merger) 6 and the four-way reversing valve 9 can also be omitted. By optimizing the flow path, both cooling and heating can be achieved and the freezing effect can be achieved, which is equivalent to a compromise. However, this will affect the capabilities of both. Therefore, the preferred scheme is to use valves such as the three-way flow divider (merger) 6 and the four-way reversing valve 9. In the solution of the present invention, valves such as a three-way diverter (merger) 6 and a four-way reversing valve 9 are provided in the heat exchanger of the indoor unit, such as the evaporator 7, so as to control the flow direction of the refrigerant when freezing is required so that its heat exchange area is controlled at the contact parts with the water channel on both sides; in a related solution, a four-way reversing valve is provided in the outdoor unit, the purpose of which is to adjust the direction of the refrigerant to achieve reversal and thus realize switching between cooling mode and heating mode.

[0064] Figure 10 This is a structural diagram of a variable flow heat exchanger. Figure 10 The figure shows a schematic diagram of a heat exchanger and its piping in an air conditioner of the present invention that can achieve the replacement of two heat exchange zones (for the sake of ease of explanation, the heat exchanger is unfolded and laid out as a whole for illustration). In the scheme of the present invention, the heat exchanger of the indoor unit, such as the evaporator 7, can achieve the adjustment and replacement of multiple heat exchange zones by optimizing the flow path and combining the three-way diverter (merger) 6 and the four-way reversing valve 9 to control the flow direction of the refrigerant to adapt to the cooling needs of different locations. In the air conditioner, after the air conditioner refrigerant enters the heat exchanger of the indoor unit, such as the evaporator 7, energy exchange (absorption or release of energy) will occur to achieve the cooling or heating effect. As the refrigerant flows in the copper tube 3, the heat exchange capacity decreases or even cannot continue to exchange heat, and then flows out from the heat exchanger of the indoor unit, such as the evaporator 7. That is, the heat exchange capacity of the refrigerant is the strongest when it enters the heat exchanger of the indoor unit, such as the evaporator 7, and is the weakest when it leaves.

[0065] Considering that the heat exchanger assembly design requires both sides to be fixed to the bottom shell, the center area of the heat exchanger directly faces the indoor unit's air inlet. Therefore, the refrigerant flow path is generally designed with the refrigerant inlet located in this area to optimize heat exchange efficiency by combining air volume and refrigerant. This area serves as the primary heat exchange zone. The sides are close to the waterway and in contact with the bottom shell, making it difficult to utilize air volume for heat exchange. Refrigerant generally flows out from this area, making it a secondary heat exchange zone.

[0066] Figure 11 Schematic diagram of the structure of the main heat exchange area of the air conditioner under different flow paths. Figure 11The following are schematic diagrams of the main heat exchange areas of the air conditioner under two different flow paths: Figure 11 As shown in the figure, the main heat exchange area can be adjusted by flow path design and valve reversing. Figure 11 As shown, when the channels controlling valve ports A and B of the four-way reversing valve 9 are connected, the refrigerant flows in from the cooling inlet, passes through the four-way reversing valve 9, enters the center of the heat exchanger, is split to the sides by the three-way flow divider 6, then flows out from the edge of the heat exchanger and merges through the three-way flow combiner 6 before flowing out from the cooling outlet through the channels of valve ports D and valve ports C of the four-way reversing valve 9. In this case, the center is the primary heat exchange zone, and the two sides are the secondary heat exchange zones. Conversely, when the channels controlling valve ports A and valve ports D of the four-way reversing valve 9 are connected, the refrigerant flows in from the cooling inlet, passes through the four-way reversing valve 9, is split to the sides by the three-way flow divider 6, enters from both sides of the heat exchanger, then merges in the middle area of the heat exchanger by the three-way flow combiner 6 before flowing out from the cooling outlet through the channels of valve ports B and valve ports C of the four-way reversing valve 9. In this case, the two sides are the primary heat exchange zones, and the center is the secondary heat exchange zone.

[0067] The solution of the present invention also provides a heat exchanger in an air conditioner with a variable flow path and its diversion control solution, which solves the heat exchange area conflict between water channel freezing and cooling and heating through the evaporator, and can simultaneously ensure the optimization of both effects.

[0068] In some embodiments, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in series and used together; and the fins at the freezing function in the indoor heat exchanger extend into the water channel of the water receiving pan.

[0069] In the solution of the present invention, the fins of the heat exchanger in the air conditioner are reasonably extended to the bottom of the water channel, and then the heat exchanger in the air conditioner is used to perform freeze stripping, condensation flushing and high-temperature sterilization to achieve a self-cleaning effect on the water channel.

[0070] In some embodiments, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in series and used together, and the fins of the indoor heat exchanger extend into the water channel of the water receiving pan; or, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in parallel and used independently of each other, and the freezing function extends into the water channel of the water receiving pan.

[0071] Figure 15 This is a schematic diagram of the heat exchanger and different flow paths of another air conditioner. Figure 16This is a schematic diagram of the structure of another air conditioner heat exchanger and different flow paths. The essence of the present invention is to extend the cooling and heating capabilities of the air conditioner heat exchanger in the related solution to the water tray area, thereby directly using the air conditioner to achieve self-cleaning of the water tray. The extension scheme is not limited to the above-mentioned embodiment (conventional flow path and freezing function are connected in series and the fins are appropriately extended), including but not limited to the following: Figure 15 Another heat exchanger embodiment shown (conventional flow path and freezing function are independent in parallel, and the fins are moderately extended), Figure 16 The related scheme of another heat exchanger embodiment shown (the conventional flow path and the freezing function are independent in parallel, the fins are not extended, and the freezing pipe is directly extended to the waterway) can still achieve the effect of the present invention and is still within the protection scope of the scheme of the present invention.

[0072] In addition, the execution procedures of condensation, frosting, defrosting and drying described in the solution of the present invention can be increased or decreased or adjusted in sequence as needed, which does not affect the effect and protection scope of the solution of the present invention.

[0073] In some embodiments, the fins at the freezing function of the indoor heat exchanger have an extension structure that is shaped like the water channel of the water receiving tray, and the extension structure can extend into the water channel of the water receiving tray. Figure 12 The shaped fins shown.

[0074] Figure 12 The diagram is a structural diagram of a special-shaped fin and its air conditioner. In the scheme of the present invention, the fin 2 of the heat exchanger is a special-shaped fin, which is designed and punched according to the structure of the water receiving tray 1 so as to facilitate assembly while contacting the bottom of the water receiving tray 1 as much as possible. Figure 12 Preferably, the minimum width of the extended section of the special-shaped fin, l, is ≥ 2 mm, the distance m between the special-shaped fin and the bottom of the water receiving tray 1 satisfies 3 mm > m > 1 mm, and the distance n between the edge of the special-shaped fin and the non-contact side of the water receiving tray 1 is greater than the minimum water channel width / 4, to ensure a perfect freezing effect while avoiding adverse effects on the smooth flow of condensed water in the water receiving tray 1.

[0075] exist Figure 12 In the example shown, the special-shaped fins are designed to mimic the water channel. The shape is not specified but determined by the water channel structure. The goal is to maximize the transfer and freezing of cooling water. The industry generally does not design special fin shapes unless there is a specific need.

[0076] The present invention also provides a special-shaped fin based on a water channel structure and an air conditioner having the same. The present invention utilizes special-shaped fins based on a water channel structure to rationally extend the fins of the air conditioner's heat exchanger to the bottom of the water channel. The heat exchanger is then used to perform freeze-stripping, condensation flushing, and high-temperature sterilization to achieve a self-cleaning effect on the water channel. This solves the problem of dirty air conditioner water channels and the inability to effectively clean them in related solutions, achieving the goal of efficient, long-lasting, and consumable-free, or even zero-cost, air conditioner water channel purification.

[0077] In some embodiments, a preset self-cleaning program is executed in step S130 to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is gathered into the water channel of the water receiving tray and frozen and defrosted and dried, thereby realizing the specific process of self-cleaning of the water receiving tray, see the following exemplary description.

[0078] The following combination Figure 2 The flowchart of an embodiment of the method of the present invention for controlling the freezing function and controlling at least one of the speed of the indoor fan and the frequency of the compressor is shown, further illustrating the specific process of controlling the freezing function and controlling at least one of the speed of the indoor fan and the frequency of the compressor in step S130, including: steps S210 to S230.

[0079] Step S210, executing a preset condensation process under a preset self-cleaning program: controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, so that the condensed water generated by the fins at the freezing function; and controlling the freezing function so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger converges into the water channel of the water receiving pan, so as to use the condensed water to flush the water channel of the water receiving pan.

[0080] Step S220, execute a preset frosting process: according to the freezing surface temperature of the indoor heat exchanger, control at least one of the speed of the indoor fan and the frequency of the compressor to frost the fin surface at the freezing function in the indoor heat exchanger, thereby freezing the condensed water gathered in the water channel of the water receiving tray.

[0081] Step S230, execute the preset defrosting and drying process: control the air conditioner to turn off the cooling mode and turn on the heating mode, and control at least one of the speed of the indoor fan and the frequency of the compressor according to the freezing surface temperature of the indoor heat exchanger to defrost the fin surface at the freezing function in the indoor heat exchanger, and then melt and dry the frost layer frozen in the water channel of the water receiving tray, exit the preset self-cleaning program, and complete the self-cleaning of the water receiving tray.

[0082] Figure 13 The figure is a flow chart of a water channel self-cleaning control method for an air conditioner. Figure 13 As shown, in combination with the above heat exchanger, the solution of the present invention provides a self-cleaning control method for the water tray of an air conditioner. Figure 13 As shown, a method for controlling the self-cleaning of a water tray of an air conditioner includes the following steps:

[0083] Step 1: Power on the air conditioner and run it, then proceed to step 2 or step 3.

[0084] Step 2: Obtain the water tray 1 self-cleaning instruction issued by the user, and then execute step 3.

[0085] The self-cleaning instruction of the water receiving tray 1 can be obtained through voice, remote control buttons, gestures, etc.

[0086] Step 3: Detect and obtain the degree of contamination of the air conditioner water tray 1 and determine whether a self-cleaning program needs to be run: if so, execute step 4; otherwise, exit the self-cleaning mode and the air conditioner operates normally.

[0087] The pollution level P of the water collection pan 1 is determined by combining the cumulative operating time t of the air conditioner and the average indoor pollutant concentration C during the corresponding time, that is, P = f(t, C). In particular, P = k1×t×C. k1 is the pollutant deposition coefficient, which characterizes the degree of pollution of the water collection pan caused by the deposition and growth of pollutants. It can be understood that the longer the operating time, or the higher the indoor environmental pollutant concentration during the same time, the higher the probability of pollution and the greater the possibility of dirtiness. The cumulative operating time t can be determined by the operating time of the air conditioner motor, and the average indoor pollutant concentration C is obtained by real-time or periodic detection by the indoor pollutant sensor and calculation of the corresponding average value.

[0088] Optionally, the degree of contamination of the water receiving tray 1 can also be directly determined by the accumulated operating time or the interval time from the last self-cleaning, or intuitive judgment through visualization technology such as a camera can also achieve the effect of the solution of the present invention.

[0089] In step 3, when the pollution degree P of the water receiving tray 1 is less than or equal to the preset value P0, it is judged as no, indicating that the cumulative operating time of the air conditioner is not long or the air quality is good, and there is no obvious dirt on the water receiving tray 1, so relevant cleaning may not be required; when the pollution degree P of the water receiving tray 1 is greater than or equal to the preset value P1, it is judged as yes, indicating that the air conditioner has been running for a long time or the indoor air quality is poor, and the possibility of dirt on the water receiving tray 1 is relatively high, and relevant programs need to be run as soon as possible for cleaning to ensure the healthy use of users.

[0090] When the pollution degree P of the water receiving tray 1 satisfies P0 < P < P1, it means that the dirt situation of the water receiving tray 1 is general, and cleaning can be carried out in a timely manner or postponed. Specifically, when the self-cleaning instruction of the water receiving tray 1 comes from user settings, the user's意愿 is the main consideration, and timely cleaning is the priority; when the self-cleaning instruction of the water receiving tray 1 comes from the air conditioner's autonomous detection, it is reminded to the user through voice, APP push, etc. to decide whether to perform the waterway self-cleaning. Particularly, when the self-cleaning instruction of the water receiving tray 1 comes from the air conditioner's autonomous detection and other regular instructions such as user cooling are being run at this time, the reminder is made after the relevant mode runs to completion.

[0091] Step 4: Control the air conditioner to perform self-cleaning of the water receiving tray, and then execute step 5.

[0092] If it is determined that the self-cleaning program needs to be run, then control the air conditioner to perform self-cleaning of the water receiving tray 1: cold dew - frosting - defrosting and drying; then control the air conditioner to run the self-cleaning mode according to the corresponding parameters, and then exit the self-cleaning mode and the air conditioner runs normally.

[0093] When it is judged that self-cleaning of the water receiving tray is required, control the air conditioner to run the following self-cleaning program. The self-cleaning in the related solutions only targets the evaporator, and the solution of the present invention can achieve freezing and purifying the waterway by using the cold quantity of the air conditioner itself through fin extension, etc. The self-cleaning program of the water receiving tray includes processes such as condensation, frosting, defrosting and drying, and these processes are carried out in sequence. Specific examples can be seen in the following illustrative explanations.

[0094] 1) Condensation process.

[0095] Control the air conditioner's air deflector to open, the channels of port A and port D of the four-way reversing valve 9 are connected, and the channels of port B and port C of the four-way reversing valve 9 are connected. At this time, the edge of the heat exchanger (i.e., the area where the heat exchanger contacts the waterway) is the main heat exchange area, and the middle is the secondary heat exchange area. Adjust the rotation speed of the indoor fan of the air conditioner and / or the operating frequency of the compressor. For example, by reducing the wind speed or increasing the compressor frequency, etc., the temperature of the evaporator tube can be made lower. When it is lower than the dew point temperature, condensation water will be generated, so that condensation occurs between the fins 2 of the evaporator 7 and converges into the water receiving tray 1.

[0096] 2) Frosting process.

[0097] Turn off the indoor unit fan or adjust the speed of the indoor unit fan and / or adjust the operating frequency of the compressor to cause frost to form on the surface of the main heat exchange area of the indoor unit evaporator to achieve a freezing effect on the water channel.

[0098] 3) Defrost and dry.

[0099] The air conditioner switches from cooling mode to heating mode by shutting down the compressor, reversing the direction of the four-way valve (i.e., the four-way valve in the outdoor unit), and restarting the compressor. The fan speed and / or compressor operating frequency in the air conditioner are adjusted to increase the temperature of the fins 2 of the evaporator 7, reaching the frost melting condition at the bottom of the water channel, and then entering the defrosting and drying process.

[0100] Step 5: Based on the detection results of step 4, control the air conditioner to operate according to the corresponding parameters and modes, and then execute step 6.

[0101] Specifically, the air conditioner automatically detects and determines the degree of dirtiness of the water receiving tray 1 according to user instructions or in combination with environmental parameters. When the degree of dirtiness of the water receiving tray 1 exceeds the necessary limit, the air conditioner is controlled to run for different times according to different system parameters such as frequency and wind speed, so as to realize the condensation, frosting and defrosting and drying processes in sequence, thereby achieving a self-cleaning effect on the water channel.

[0102] Step 6: Exit the water tray self-cleaning mode and the air conditioner will operate normally.

[0103] When it is determined that the water tray does not need to be self-cleaned or the water tray self-cleaning program is completed, the air conditioner is controlled to operate in cooling, heating and other modes normally according to user needs.

[0104] At this time, keep the air guide plate of the air conditioner open, control the passages of valve port A and valve port B of the four-way reversing valve 9 to be connected, and the passages of valve port D and valve port C of the four-way reversing valve 9 to be connected. The middle of the heat exchanger is the main heat exchange area, and the edge is the secondary heat exchange area. The refrigerant exchanges energy with the air in the main heat exchange area in the middle, facing the air inlet, which makes it easier to achieve the best heat exchange effect.

[0105] In particular, when it is determined that the water tray does not need to be self-cleaned, but the self-cleaning instruction of the water tray 1 comes from the user, voice push, panel display and mobile phone APP push are required to remind the user that the water tray is currently clean and does not need to be self-cleaned, so as to avoid the user questioning the normal operation of the air conditioner function.

[0106] In the solution of the present invention, when the air conditioner water tray is self-cleaning, condensed water is used for freeze-thaw purification, which can achieve long-term purification. In this way, the air conditioner can adjust the heat exchanger flow path and optimize the fins, utilize the coordinated control of the existing compressor, fan and other actuators in the air conditioner, and combine system parameter control to achieve the condensation, frosting, defrosting and drying processes of the water tray without adding external purification devices, thereby achieving the effects of condensation cleaning, freeze stripping, and high-temperature sterilization. That is, the air conditioner completely relies on itself to achieve self-cleaning of the water tray, and it is efficient, long-lasting and requires no consumables. In the solution of the present invention, during the evaporator self-cleaning process, condensation has a cleaning and flushing effect, the frost volume increases, and has a stripping effect, defrosting can be used for secondary cleaning, and drying can be used for sterilization and drying.

[0107] In some embodiments, in step S210, during the execution of the preset condensation process, at least one of the speed of the indoor fan and the frequency of the compressor is controlled according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, so that the condensed water generated by the fins at the freezing function is generated. For the specific process, see the following exemplary description.

[0108] The following combination Figure 3 The flowchart of an embodiment of the method of the present invention for controlling at least one of the rotational speed of the indoor fan and the frequency of the compressor so that condensed water is produced on the fins at the freezing function is shown, further illustrating the specific process of controlling at least one of the rotational speed of the indoor fan and the frequency of the compressor so that condensed water is produced on the fins at the freezing function in step S210, including: steps S310 to S330.

[0109] Step S310, determining the surface condensation temperature of the indoor heat exchanger according to the indoor ambient temperature of the air conditioner and the indoor relative humidity of the air conditioner; wherein the surface condensation temperature of the indoor heat exchanger, such as the surface condensation temperature T 露 .

[0110] Step S320: reducing the rotation speed of the indoor fan and / or increasing the frequency of the compressor so that the freezing surface temperature of the indoor heat exchanger is less than or equal to the surface condensation temperature of the indoor heat exchanger.

[0111] Step S330, maintaining the set condensation time to freeze the condensed water generated by the fins at the freezing function. 露 .

[0112] like Figure 13 As shown, a method for controlling the self-cleaning of a water tray of an air conditioner further includes the following steps:

[0113] During the cooling process of step 4, the speed of the fan and / or the operating frequency of the compressor in the air conditioner are adjusted. For example, by reducing the wind speed or increasing the compressor frequency, the evaporator tube temperature can be kept low. When the temperature is lower than the dew point temperature, condensed water is generated, so that condensation is generated between the fins 2 of the evaporator 7 and collected in the water receiving tray 1, including:

[0114] ① Obtain the current temperature and relative humidity of the indoor environment where the indoor unit is located through the ambient temperature and humidity sensor to determine the condensation temperature T on the evaporator surface 露 ;

[0115] Among them, there is a corresponding relationship between air temperature, relative humidity, and air moisture content, which can be calculated equivalently and can also be reflected in the enthalpy-humidity diagram. The temperature curve and relative humidity curve of this diagram can be used to obtain the dew point temperature under certain conditions (when the relative humidity is 100%). Controlling the evaporator surface temperature below this dew point temperature will produce condensation.

[0116] ② Reduce the indoor unit fan speed and adjust the compressor operating frequency to control the evaporator surface temperature T, so that it remains below the indoor condensation temperature, that is, T≤T 露 The surface temperature of the evaporator is obtained by detecting the temperature sensor package;

[0117] ③ Maintain the condensation process on the evaporator surface for a certain time t 露 , to generate enough condensation water to contact and cover the entire waterway surface.

[0118] Preferably, the duration of condensation of the evaporator is t 露 5 minutes to 15 minutes.

[0119] In the solution of the present invention, during the execution of the preset condensation process, the speed of the indoor fan and at least one of the frequency of the compressor are controlled according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, so that the condensed water generated by the fins at the freezing function can quickly generate sufficient condensed water for condensation cleaning, which is conducive to improving the efficiency and effect of self-cleaning.

[0120] In some embodiments, in step S220, when executing a preset frosting process, at least one of the speed of the indoor fan and the frequency of the compressor is controlled according to the freezing surface temperature of the indoor heat exchanger to cause frost on the fin surface of the freezing function in the indoor heat exchanger, thereby freezing the condensed water gathered in the water channel of the water receiving tray. For the specific process, please refer to the following exemplary description.

[0121] The following combination Figure 4The flowchart of an embodiment of the method of the present invention for controlling at least one of the rotational speed of the indoor fan and the frequency of the compressor to cause frost on the fin surface at the freezing function in the indoor heat exchanger is shown, further illustrating the specific process of controlling at least one of the rotational speed of the indoor fan and the frequency of the compressor to cause frost on the fin surface at the freezing function in the indoor heat exchanger in step S220, including: steps S410 to S430.

[0122] Step S410, determining the corrected temperature of the indoor heat exchanger; wherein the corrected temperature of the indoor heat exchanger is such as the corrected temperature T 霜修正 .

[0123] Step S420: Turn off the indoor fan or reduce the speed of the indoor fan, and / or increase the frequency of the compressor, so that the sum of the freezing surface temperature of the indoor heat exchanger and the correction temperature of the indoor heat exchanger is within the error range of the set frosting target temperature of the indoor heat exchanger; wherein the error range of the set frosting target temperature of the indoor heat exchanger is, for example, the frosting target temperature T 霜 -1℃ to frost target temperature T 霜 +1℃.

[0124] Step S430, maintaining the set frosting time, so that the fin surface of the freezing function in the indoor heat exchanger is frosted, and the condensed water collected in the water channel of the water receiving tray is frozen. 霜 .

[0125] like Figure 13 As shown, a method for controlling the self-cleaning of a water tray of an air conditioner further includes the following steps:

[0126] During the frosting process in step 4, the indoor unit fan is turned off or the speed of the indoor unit fan and / or the operating frequency of the compressor is adjusted to cause frost to form on the surface of the main heat exchange area of the indoor unit evaporator, thereby achieving a freezing effect on the water channel, including:

[0127] ① Reduce the speed of the indoor fan or turn off the indoor fan, and adjust the operating frequency of the compressor. For example, by reducing or even turning off the fan speed or increasing the compressor frequency, the evaporator tube temperature can be kept low. When it is below zero degrees, frost will form. This is to control the surface temperature T of the evaporator's main heat exchange area so that it remains within a certain frosting target temperature range after freezing correction. The frosting target temperature range is T 霜 ±1℃, that is, T 霜 -1℃≤T+T 霜修正 ≤T 霜 +1℃. Specifically, when T 霜 -1℃-T 霜修正≥T, increase wind speed or reduce frequency, T≥T 霜 +1℃-T 霜修正 When the wind speed is reduced or the frequency is increased, T 霜 +1℃-T 霜修正 ≥T≥T 霜 -1℃-T 霜修正 Preferably, the frosting target temperature T 霜 The correction temperature T 霜修正 It is related to the extension of the heat exchanger's fins 2 in the water channel (including the equivalent extension depth and width), the thermal conductivity of the fins 2, etc., and is pre-set by the air conditioner manufacturer before leaving the factory.

[0128] ② Maintain the frosting process on the evaporator surface for a certain time t 霜 , so that the entire waterway surface can be frozen. Preferably, the duration of frost on the evaporator is t 霜 It is 10 minutes to 30 minutes.

[0129] In the solution of the present invention, when executing the preset frosting process, at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled according to the freezing surface temperature of the indoor heat exchanger, so that the fin surface of the freezing function in the indoor heat exchanger is frosted, and the condensed water gathered in the water channel of the water receiving tray is frozen, realizing freeze stripping, which is beneficial to improving the self-cleaning effect.

[0130] In some embodiments, in step S230, during the execution of the preset defrosting and drying process, the air conditioner is controlled to turn off the cooling mode and turn on the heating mode, and according to the freezing surface temperature of the indoor heat exchanger, at least one of the speed of the indoor fan and the frequency of the compressor is controlled to defrost the surface of the fins at the freezing function in the indoor heat exchanger, thereby melting the frost layer in the water channel of the water receiving tray and drying it. For the specific process, please refer to the following exemplary description.

[0131] The following combination Figure 5 The flowchart of an embodiment of the method of the present invention for controlling at least one of the rotational speed of the indoor fan and the frequency of the compressor so as to defrost the fin surface at the freezing function in the indoor heat exchanger is shown, further illustrating the specific process of controlling at least one of the rotational speed of the indoor fan and the frequency of the compressor so as to defrost the fin surface at the freezing function in the indoor heat exchanger in step S230, including: steps S510 to S520.

[0132] Step S510, reducing the speed of the indoor fan and / or increasing the frequency of the compressor so that the freezing surface temperature of the indoor heat exchanger is within the error range of the set defrost target temperature of the indoor heat exchanger; wherein the error range of the set defrost target temperature of the indoor heat exchanger is, for example, the defrost target temperature T 化 -2℃ to defrost target temperature T 化 +2℃.

[0133] Step S520 , maintaining the set defrost time to defrost the fin surface of the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving pan.

[0134] like Figure 13 As shown, a method for controlling the self-cleaning of a water tray of an air conditioner further includes the following steps:

[0135] During the defrosting and drying process in step 4, the air conditioner switches from cooling mode to heating mode by shutting down the compressor, reversing the direction of the four-way valve (i.e., the four-way valve in the outdoor unit), and restarting the compressor. The air conditioner fan speed and / or the operating frequency of the compressor are adjusted to increase the temperature of the fins 2 of the evaporator 7 to meet the frost melting conditions at the bottom of the water channel, thereby entering the defrosting and drying process, which includes:

[0136] ① Adjust the indoor unit fan speed and control the compressor operating frequency. For example, when heating, the evaporator tube temperature can be controlled by increasing the compressor frequency or reducing the wind speed to keep the evaporator surface temperature T within a certain defrost target temperature range. The defrost target temperature range is T 化 ±2℃, that is, T 化 +2℃≥T≥T 化 -2℃. Specifically, when T 化 When -2℃≥T, reduce wind speed or increase frequency, T≥T 化 At +2℃, increase wind speed or reduce frequency, T 化 +2℃≥T≥T 化 At -2°C, the wind speed frequency remains unchanged. Preferably, the defrost target temperature T 化 56℃~65℃;

[0137] ② Maintain the defrosting and drying process of the evaporator surface for a certain time t 化 , so that the frost layer between the fins and in the water receiving tray can be effectively melted and fully dried.

[0138] Preferably, the duration of the evaporator defrosting and drying is t 化 30-40 minutes.

[0139] In the solution of the present invention, during the preset defrosting and drying process, the air conditioner is controlled to turn off the cooling mode and turn on the heating mode. According to the freezing surface temperature of the indoor heat exchanger, at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled to defrost the surface of the fins at the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer in the water channel frozen in the water receiving tray. The self-cleaning effect can be further improved by high-temperature sterilization.

[0140] The technical solution of this embodiment is adopted, by making the refrigerant flow path of the indoor heat exchanger of the air conditioner have heat exchange function (i.e. conventional flow path) and freezing function, and selectively making the fins of the freezing function extend to the area where the water receiving tray (such as the water receiving tray 1) is located; when the air conditioner is turned on and runs in cooling mode, it is determined whether the self-cleaning program of the air conditioner needs to be started; when the self-cleaning program of the air conditioner needs to be started, during the condensation process: the freezing function is turned on, and at least one of the speed of the indoor fan and the frequency of the compressor is adjusted to make the freezing function generate condensed water and gather it in the water receiving tray; frosting During the process: adjust at least one of the speed of the indoor fan and the frequency of the compressor to freeze the surface of the water channel in the water receiving pan; during the defrosting and drying process: switch from the cooling mode to the heating mode, adjust at least one of the speed of the indoor fan and the frequency of the compressor to defrost and dry the surface of the water channel; then exit the self-cleaning program: turn off the freezing function and turn on the heat exchange function; thus, by making the refrigerant flow path of the indoor heat exchanger of the air conditioner have a freezing function, utilizing the freezing function to generate condensed water into the water receiving pan, and performing frosting and defrosting and drying to achieve self-cleaning, avoid dirt and odor in the water channel, and benefit human health.

[0141] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method for the air conditioner is also provided. Figure 6 The structure diagram of an embodiment of the device of the present invention is shown. The air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compressor, the indoor unit comprises an indoor heat exchanger, an indoor fan, and a water receiving pan; the indoor heat exchanger comprises copper tubes and fins, the copper tubes forming a refrigerant flow path of the indoor heat exchanger, the refrigerant flow path of the indoor heat exchanger has a heat exchange function and a freezing function, the heat exchange capacity of the freezing function is greater than the heat exchange capacity of the heat exchange function, the condensed water generated by the fins at the freezing function of the indoor heat exchanger can be collected in the water channel of the water receiving pan and frozen and defrosted and dried, the water receiving pan of the heat exchange function is as shown in FIG. Figure 8 The water tray 1 shown, the copper pipe is as follows Figure 8 The copper tube 3 shown has fins such as Figure 8 The fin 2 shown; in the solution of the present invention, as Figure 6 As shown, the control device of the air conditioner includes: an acquisition unit 102 and a control unit 104.

[0142] The acquisition unit 102 is configured to, after the air conditioner is powered on and the self-cleaning function for self-cleaning the water tray is enabled, acquire the degree of contamination of the water tray, acquire the indoor ambient temperature of the air conditioner, and acquire the indoor ambient relative humidity of the air conditioner; and acquire the temperature of the freezing function location of the indoor heat exchanger, specifically, acquire the fin surface temperature of the freezing function location of the indoor heat exchanger, which is recorded as the freezing surface temperature of the indoor heat exchanger. The specific functions and processing of the acquisition unit 102 are described in step S110.

[0143] The control unit 104 is configured to determine whether the water receiving tray needs to be self-cleaned according to the degree of contamination of the water receiving tray. The specific functions and processing of the control unit 104 are shown in step S120.

[0144] The control unit 104 is further configured to, if it is determined that the water receiving pan needs to be self-cleaned, execute a preset self-cleaning program to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the rotation speed of the indoor fan and the frequency of the compressor, so that condensed water generated by the fins of the freezing function in the indoor heat exchanger is collected in the water channel of the water receiving pan and frozen, defrosted, and dried, thereby achieving self-cleaning of the water receiving pan. The specific functions and processing of the control unit 104 are further described in step S130.

[0145] The solution of the present invention provides a self-cleaning control solution for the water channel of an air conditioner. The solution achieves a self-cleaning effect on the water channel by reasonably extending the fins of the heat exchanger in the air conditioner to the bottom of the water channel, and then utilizing the heat exchanger in the air conditioner to perform freeze stripping, condensation flushing and high-temperature sterilization. The main process of the solution of the present invention is freezing, directly utilizing the cooling capacity of the air conditioner, and using condensed water to perform freeze stripping of the water channel, which can effectively solve the problem of dirtiness of the water channel of the air conditioner and is beneficial to human health.

[0146] In some embodiments, the indoor unit further comprises a first three-way flow dividing device, a second three-way flow dividing device, and a four-way reversing device, wherein the first three-way flow dividing device and the second three-way flow dividing device are as follows: Figure 9 and Figure 10 The three-way diverter 6 shown, the four-way reversing device is as shown Figure 9 and Figure 10 The four-way reversing valve 9 shown in the figure; the copper tube of the indoor heat exchanger has a refrigerant inlet pipe, a refrigerant outlet pipe and a refrigerant main pipe; the refrigerant main pipe is the refrigerant pipe between the refrigerant inlet pipe and the refrigerant outlet pipe.

[0147] The first three-way flow divider is provided at the connection between the refrigerant main pipe and the refrigerant outlet pipe; the second three-way flow divider is provided at the connection between the refrigerant inlet pipe and the refrigerant main pipe; and the four-way reversing device is provided between the refrigerant inlet pipe and the refrigerant outlet pipe. The heat exchange region where the refrigerant main pipe is located includes: a first heat exchange region, a second heat exchange region, and a third heat exchange region; the first heat exchange region and the third heat exchange region are located on both sides of the second heat exchange region. By controlling the first three-way flow divider, the second three-way flow divider, and the four-way reversing device, it is possible to control whether the refrigerant flow paths corresponding to the corresponding heat exchange regions in the first heat exchange region, the second heat exchange region, and the third heat exchange region belong to the heat exchange function or the freezing function.

[0148] Specifically, when the air conditioner operates in cooling mode or heating mode, the first three-way flow dividing device, the second three-way flow dividing device, and the four-way reversing device are controlled so that the refrigerant flow paths corresponding to the first heat exchange area and the third heat exchange area are used for the heat exchange function, and the refrigerant flow path corresponding to the second heat exchange area is used for the freezing function;

[0149] When the air conditioner executes a preset self-cleaning program, by controlling the first three-way diverter device, the second three-way diverter device, and the four-way reversing device, the refrigerant flow paths corresponding to the first heat exchange area and the third heat exchange area are set to the freezing function, and the refrigerant flow path corresponding to the second heat exchange area is set to the heat exchange function.

[0150] The present invention provides a water channel self-cleaning control solution for air conditioners to solve the problems of dirty water trays and difficulty in cleaning in related solutions. Figures 8 to 12 As shown, the solution of the present invention first provides a heat exchanger in an air conditioner. Figure 8 This is a schematic diagram of an air conditioner with a self-cleaning function for the water tray. Figure 8As shown, the air conditioner includes an indoor unit and an outdoor unit. The indoor unit has an air inlet 4, an internal fan 8, and an air outlet 5. The air duct connecting the air inlet 4 and the air outlet 5 contains a water collection tray 1 and an environmental parameter detection device (such as a temperature and humidity sensor). The outdoor unit includes components such as a compressor, an external fan, and a condenser. The environmental parameter detection device comprises an air quality detection unit and an air temperature and humidity detection unit. The air quality detection unit is used to detect indoor air quality and may include a PM2.5 sensor, a microbial sensor, etc. The air temperature and humidity detection unit is used to detect indoor ambient temperature and humidity and may include a temperature sensor, a humidity sensor, or a temperature and humidity sensor. An evaporator 7 is mounted above the water collection tray 1. The evaporator 7 has a copper tube 3 and fins 2. When the air conditioner is in cooling mode, condensed water is generated by the evaporator 7. This condensed water flows down the fins 2 of the evaporator 7 and converges into the water collection tray 1. The condensed water flows from the upper portion of the water collection tray 1 to the lower portion of the water collection tray 1, and is finally discharged to the outside through the drain nozzle and the air conditioner's drain pipe. Optionally, the drain nozzle has a controllable opening and closing valve, and the opening and closing of the valve can control the flow of condensed water in the water receiving tray 1 .

[0151] Figure 9 The diagram is a schematic diagram of the structure of a three-way flow divider (merger) and a four-way reversing valve, wherein (a) is a three-way flow divider and (b) is a four-way reversing valve. Figure 9 As shown, a heat exchanger, such as an evaporator 7, includes a three-way flow divider (merger) 6 and a four-way reversing valve 9. The three-way flow divider 6 has valve ports A, B, and C; the four-way reversing valve 9 has valve ports A, B, C, and D. The three-way flow divider 6 can divide and merge the refrigerant flow, while the four-way reversing valve 9 can control the flow of different channels to adjust the direction of the refrigerant flow.

[0152] In the related schemes, a four-way reversing valve 9 is generally not specially provided in the heat exchanger. In the scheme of the present invention, a three-way flow divider (merger) 6 and a four-way reversing valve 9 are provided in the heat exchanger to adjust the flow path of the refrigerant to achieve control of the main heat exchange area. As described in the scheme of the present invention, the goal of a normal air conditioner is cooling or heating, so the main heat exchange area is generally controlled in the middle of the entire heat exchanger. However, the scheme of the present invention requires a freezing effect. When freezing is required, the refrigerant flow direction needs to be controlled so that the heat exchange area is controlled in the contact area with the water channel on both sides. In this way, the cooling capacity is maximized, the temperature is lower, and it is easier to freeze. Of course, in theory, valves such as the three-way flow divider (merger) 6 and the four-way reversing valve 9 can also be omitted. By optimizing the flow path, both cooling and heating can be achieved and the freezing effect can be achieved, which is equivalent to a compromise. However, this will affect the capabilities of both. Therefore, the preferred scheme is to use valves such as the three-way flow divider (merger) 6 and the four-way reversing valve 9. In the solution of the present invention, valves such as a three-way diverter (merger) 6 and a four-way reversing valve 9 are provided in the heat exchanger of the indoor unit, such as the evaporator 7, so as to control the flow direction of the refrigerant when freezing is required so that its heat exchange area is controlled at the contact parts with the water channel on both sides; in a related solution, a four-way reversing valve is provided in the outdoor unit, the purpose of which is to adjust the direction of the refrigerant to achieve reversal and thus realize switching between cooling mode and heating mode.

[0153] Figure 10 This is a structural diagram of a variable flow heat exchanger. Figure 10 The figure shows a schematic diagram of a heat exchanger and its piping in an air conditioner of the present invention that can achieve the replacement of two heat exchange zones (for the sake of ease of explanation, the heat exchanger is unfolded and laid out as a whole for illustration). In the scheme of the present invention, the heat exchanger of the indoor unit, such as the evaporator 7, can achieve the adjustment and replacement of multiple heat exchange zones by optimizing the flow path and combining the three-way diverter (merger) 6 and the four-way reversing valve 9 to control the flow direction of the refrigerant to adapt to the cooling needs of different locations. In the air conditioner, after the air conditioner refrigerant enters the heat exchanger of the indoor unit, such as the evaporator 7, energy exchange (absorption or release of energy) will occur to achieve the cooling or heating effect. As the refrigerant flows in the copper tube 3, the heat exchange capacity decreases or even cannot continue to exchange heat, and then flows out from the heat exchanger of the indoor unit, such as the evaporator 7. That is, the heat exchange capacity of the refrigerant is the strongest when it enters the heat exchanger of the indoor unit, such as the evaporator 7, and is the weakest when it leaves.

[0154] Considering that the heat exchanger assembly design requires both sides to be fixed to the bottom shell, the center area of the heat exchanger directly faces the indoor unit's air inlet. Therefore, the refrigerant flow path is generally designed with the refrigerant inlet located in this area to optimize heat exchange efficiency by combining air volume and refrigerant. This area serves as the primary heat exchange zone. The sides are close to the waterway and in contact with the bottom shell, making it difficult to utilize air volume for heat exchange. Refrigerant generally flows out from this area, making it a secondary heat exchange zone.

[0155] Figure 11 Schematic diagram of the structure of the main heat exchange area of the air conditioner under different flow paths. Figure 11The following are schematic diagrams of the main heat exchange areas of the air conditioner under two different flow paths: Figure 11 As shown in the figure, the main heat exchange area can be adjusted by flow path design and valve reversing. Figure 11 As shown, when the channels controlling valve ports A and B of the four-way reversing valve 9 are connected, the refrigerant flows in from the cooling inlet, passes through the four-way reversing valve 9, enters the center of the heat exchanger, is split to the sides by the three-way flow divider 6, then flows out from the edge of the heat exchanger and merges through the three-way flow combiner 6 before flowing out from the cooling outlet through the channels of valve ports D and valve ports C of the four-way reversing valve 9. In this case, the center is the primary heat exchange zone, and the two sides are the secondary heat exchange zones. Conversely, when the channels controlling valve ports A and valve ports D of the four-way reversing valve 9 are connected, the refrigerant flows in from the cooling inlet, passes through the four-way reversing valve 9, is split to the sides by the three-way flow divider 6, enters from both sides of the heat exchanger, then merges in the middle area of the heat exchanger by the three-way flow combiner 6 before flowing out from the cooling outlet through the channels of valve ports B and valve ports C of the four-way reversing valve 9. In this case, the two sides are the primary heat exchange zones, and the center is the secondary heat exchange zone.

[0156] The solution of the present invention also provides a heat exchanger in an air conditioner with a variable flow path and its diversion control solution, which solves the heat exchange area conflict between water channel freezing and cooling and heating through the evaporator, and can simultaneously ensure the optimization of both effects.

[0157] In some embodiments, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in series and used together; and the fins at the freezing function in the indoor heat exchanger extend into the water channel of the water receiving pan.

[0158] In the solution of the present invention, the fins of the heat exchanger in the air conditioner are reasonably extended to the bottom of the water channel, and then the heat exchanger in the air conditioner is used to perform freeze stripping, condensation flushing and high-temperature sterilization to achieve a self-cleaning effect on the water channel.

[0159] In some embodiments, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in series and used together, and the fins of the indoor heat exchanger extend into the water channel of the water receiving pan; or, in the indoor heat exchanger, the heat exchange function and the freezing function are connected in parallel and used independently of each other, and the freezing function extends into the water channel of the water receiving pan.

[0160] Figure 15 This is a schematic diagram of the heat exchanger and different flow paths of another air conditioner. Figure 16This is a schematic diagram of the structure of another air conditioner heat exchanger and different flow paths. The essence of the present invention is to extend the cooling and heating capabilities of the air conditioner heat exchanger in the related solution to the water tray area, thereby directly using the air conditioner to achieve self-cleaning of the water tray. The extension scheme is not limited to the above-mentioned embodiment (conventional flow path and freezing function are connected in series and the fins are appropriately extended), including but not limited to the following: Figure 15 Another heat exchanger embodiment shown (conventional flow path and freezing function are independent in parallel, and the fins are moderately extended), Figure 16 The related scheme of another heat exchanger embodiment shown (the conventional flow path and the freezing function are independent in parallel, the fins are not extended, and the freezing pipe is directly extended to the waterway) can still achieve the effect of the present invention and is still within the protection scope of the scheme of the present invention.

[0161] In the solution of the present invention, the cooling capacity of the indoor heat exchanger is extended to the water channel to achieve freeze-stripping and high-temperature sterilization effects. The above example solution adopts the flow path switching method to realize the freezing flow path and the heat exchange flow path, in which case the heat exchanger copper tube is shared. Figure 15 The freezing effect is achieved by connecting freezing pipes in parallel at both ends of the heat exchanger. During freezing, the refrigerant only follows the freezing path and freezes through the edges of the tube fins. Figure 16 It is equivalent to directly introducing a freezing pipe or capillary tube into the waterway to achieve freezing, or in parallel.

[0162] In addition, the execution procedures of condensation, frosting, defrosting and drying described in the solution of the present invention can be increased or decreased or adjusted in sequence as needed, which does not affect the effect and protection scope of the solution of the present invention.

[0163] In some embodiments, the fins at the freezing function of the indoor heat exchanger have an extension structure that is shaped like the water channel of the water receiving tray, and the extension structure can extend into the water channel of the water receiving tray. Figure 12 The shaped fins shown.

[0164] Figure 12 The diagram is a structural diagram of a special-shaped fin and its air conditioner. In the scheme of the present invention, the fin 2 of the heat exchanger is a special-shaped fin, which is designed and punched according to the structure of the water receiving tray 1 so as to facilitate assembly while contacting the bottom of the water receiving tray 1 as much as possible. Figure 12 Preferably, the minimum width of the extended section of the special-shaped fin, l, is ≥ 2 mm, the distance m between the special-shaped fin and the bottom of the water receiving tray 1 satisfies 3 mm > m > 1 mm, and the distance n between the edge of the special-shaped fin and the non-contact side of the water receiving tray 1 is greater than the minimum water channel width / 4, to ensure a perfect freezing effect while avoiding adverse effects on the smooth flow of condensed water in the water receiving tray 1.

[0165] exist Figure 12 In the example shown, the special-shaped fins are designed to mimic the water channel. The shape is not specified but determined by the water channel structure. The goal is to maximize the transfer and freezing of cooling water. The industry generally does not design special fin shapes unless there is a specific need.

[0166] The present invention also provides a special-shaped fin based on a water channel structure and an air conditioner having the same. The present invention utilizes special-shaped fins based on a water channel structure to rationally extend the fins of the air conditioner's heat exchanger to the bottom of the water channel. The heat exchanger is then used to perform freeze-stripping, condensation flushing, and high-temperature sterilization to achieve a self-cleaning effect on the water channel. This solves the problem of dirty air conditioner water channels and the inability to effectively clean them in related solutions, achieving the goal of efficient, long-lasting, and consumable-free, or even zero-cost, air conditioner water channel purification.

[0167] In some embodiments, the control unit 104 executes a preset self-cleaning program to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the rotation speed of the indoor fan and the frequency of the compressor, so that condensed water generated by the fins at the freezing function in the indoor heat exchanger is collected in the water channel of the water receiving tray and is frozen and defrosted and dried, thereby achieving self-cleaning of the water receiving tray, including:

[0168] The control unit 104 is further configured to execute a preset condensation process under a preset self-cleaning program: controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor based on the indoor ambient temperature of the air conditioner, the indoor relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger to condense water generated by the fins at the freezing function; and controlling the freezing function to cause the condensed water generated by the fins at the freezing function of the indoor heat exchanger to converge into the water channel of the water receiving pan, thereby flushing the water channel of the water receiving pan with the condensed water. The specific functions and processing of the control unit 104 are further described in step S210.

[0169] The control unit 104 is further configured to execute a predetermined frosting process by controlling at least one of the rotational speed of the indoor fan and the frequency of the compressor based on the freezing surface temperature of the indoor heat exchanger, thereby causing frost to form on the fin surfaces of the freezing function in the indoor heat exchanger, thereby freezing the condensed water collected in the water channel of the water receiving pan. The specific functions and processing of the control unit 104 are further described in step S220.

[0170] The control unit 104 is further configured to execute a preset defrosting and drying process: controlling the air conditioner to turn off the cooling mode and turn on the heating mode, and controlling at least one of the speed of the indoor fan and the frequency of the compressor based on the frozen surface temperature of the indoor heat exchanger to defrost the fin surface of the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving tray, and then exiting the preset self-cleaning program to complete the self-cleaning of the water receiving tray. The specific functions and processing of the control unit 104 are further described in step S230.

[0171] Figure 13 The figure is a flow chart of a water channel self-cleaning control method for an air conditioner. Figure 13 As shown, in combination with the above heat exchanger, the solution of the present invention provides a self-cleaning control method for the water tray of an air conditioner. Figure 13 As shown, a method for controlling the self-cleaning of a water tray of an air conditioner includes the following steps:

[0172] Step 1: Power on the air conditioner and run it, then proceed to step 2 or step 3.

[0173] Step 2: Obtain the water tray 1 self-cleaning instruction issued by the user, and then execute step 3.

[0174] The self-cleaning instruction of the water receiving tray 1 can be obtained through voice, remote control buttons, gestures, etc.

[0175] Step 3: Detect and obtain the degree of contamination of the air conditioner water tray 1 and determine whether a self-cleaning program needs to be run: if so, execute step 4; otherwise, exit the self-cleaning mode and the air conditioner operates normally.

[0176] The pollution level P of the water collection pan 1 is determined by combining the cumulative operating time t of the air conditioner and the average indoor pollutant concentration C during the corresponding time, that is, P = f(t, C). In particular, P = k1×t×C. k1 is the pollutant deposition coefficient, which characterizes the degree of pollution of the water collection pan caused by the deposition and growth of pollutants. It can be understood that the longer the operating time, or the higher the indoor environmental pollutant concentration during the same time, the higher the probability of pollution and the greater the possibility of dirtiness. The cumulative operating time t can be determined by the operating time of the air conditioner motor, and the average indoor pollutant concentration C is obtained by real-time or periodic detection by the indoor pollutant sensor and calculation of the corresponding average value.

[0177] Optionally, the degree of contamination of the water receiving tray 1 can also be directly determined by the accumulated operating time or the interval time from the last self-cleaning, or intuitive judgment through visualization technology such as a camera can also achieve the effect of the solution of the present invention.

[0178] In step 3, when the pollution degree P of the water receiving tray 1 is less than or equal to the preset value P0, it is judged as no, indicating that the cumulative running time of the air conditioner is not long or the air quality is good, and there is no obvious dirt on the water receiving tray 1, so relevant cleaning can be not carried out; when the pollution degree P of the water receiving tray 1 is greater than or equal to the preset value P1, it is judged as yes, indicating that the air conditioner has run for a long time or the indoor air quality is poor, and the possibility of dirt on the water receiving tray 1 is relatively high, and relevant programs need to be run as soon as possible for cleaning to ensure the healthy use of users.

[0179] When the pollution degree P of the water receiving tray 1 satisfies P0 < P < P1, it means that the dirt situation of the water receiving tray 1 is general, and cleaning can be carried out in time or postponed. Specifically, when the self-cleaning instruction of the water receiving tray 1 comes from user settings, the user's意愿 is the main consideration, and timely cleaning has the highest priority; when the self-cleaning instruction of the water receiving tray 1 comes from the air conditioner's autonomous detection, the user is reminded by means of voice, APP push, etc. to decide whether to carry out the water channel self-cleaning. Especially, when the self-cleaning instruction of the water receiving tray 1 comes from the air conditioner's autonomous detection and other conventional instructions such as user refrigeration are being run at this time, the reminder will be given after the relevant mode runs to completion.

[0180] Step 4: Control the air conditioner to perform self-cleaning of the water receiving tray, and then execute step 5.

[0181] If it is determined that the self-cleaning program needs to be run, control the air conditioner to perform self-cleaning of the water receiving tray 1: cold dew - frosting - defrosting and drying; then control the air conditioner to run the self-cleaning mode according to the corresponding parameters, and then exit the self-cleaning mode and the air conditioner runs normally.

[0182] When it is judged that self-cleaning of the water receiving tray is required, control the air conditioner to run the following self-cleaning program. The self-cleaning in the related solutions only targets the evaporator. The solution of the present invention can realize freezing and purifying the water channel by using the cold quantity of the air conditioner itself through fin extension, etc. The self-cleaning program of the water receiving tray includes processes such as condensation, frosting, defrosting and drying, and these processes are carried out in sequence. Specific examples can be seen in the following illustrative explanations.

[0183] 1) Condensation process.

[0184] Control the air conditioner's air deflector to open, the channels of port A and port D of the four-way reversing valve 9 are connected, and the channels of port B and port C of the four-way reversing valve 9 are connected. At this time, the edge of the heat exchanger (i.e., the area where the heat exchanger contacts the water channel) is the main heat exchange area, and the middle is the secondary heat exchange area. Adjust the rotation speed of the internal fan of the air conditioner and / or the working frequency of the compressor. For example, by reducing the wind speed or increasing the compressor frequency, etc., the temperature of the evaporator tube can be made lower. When it is lower than the dew point temperature, condensation water will be generated, so that condensation occurs between the fins 2 of the evaporator 7 and converges into the water receiving tray 1.

[0185] 2) Frosting process.

[0186] Turn off the indoor unit fan or adjust the speed of the indoor unit fan and / or adjust the operating frequency of the compressor to cause frost to form on the surface of the main heat exchange area of the indoor unit evaporator to achieve a freezing effect on the water channel.

[0187] 3) Defrost and dry.

[0188] The air conditioner switches from cooling mode to heating mode by shutting down the compressor, reversing the direction of the four-way valve (i.e., the four-way valve in the outdoor unit), and restarting the compressor. The fan speed and / or compressor operating frequency in the air conditioner are adjusted to increase the temperature of the fins 2 of the evaporator 7, reaching the frost melting condition at the bottom of the water channel, and then entering the defrosting and drying process.

[0189] Step 5: Control the air conditioner to operate according to the corresponding parameters and mode, and then proceed to step 6.

[0190] Specifically, the air conditioner automatically detects and determines the degree of dirtiness of the water receiving tray 1 according to user instructions or in combination with environmental parameters. When the degree of dirtiness of the water receiving tray 1 exceeds the necessary limit, the air conditioner is controlled to run for different times according to different system parameters such as frequency and wind speed, so as to realize the condensation, frosting and defrosting and drying processes in sequence, thereby achieving a self-cleaning effect on the water channel.

[0191] Step 6: Exit the water tray self-cleaning mode and the air conditioner will operate normally.

[0192] When it is determined that the water tray does not need to be self-cleaned or the water tray self-cleaning program is completed, the air conditioner is controlled to operate in cooling, heating and other modes normally according to user needs.

[0193] At this time, keep the air guide plate of the air conditioner open, control the passages of valve port A and valve port B of the four-way reversing valve 9 to be connected, and the passages of valve port D and valve port C of the four-way reversing valve 9 to be connected. The middle of the heat exchanger is the main heat exchange area, and the edge is the secondary heat exchange area. The refrigerant exchanges energy with the air in the main heat exchange area in the middle, facing the air inlet, which makes it easier to achieve the best heat exchange effect.

[0194] In particular, when it is determined that the water tray does not need to be self-cleaned, but the self-cleaning instruction of the water tray 1 comes from the user, voice push, panel display and mobile phone APP push are required to remind the user that the water tray is currently clean and does not need to be self-cleaned, so as to avoid the user questioning the normal operation of the air conditioner function.

[0195] In the solution of the present invention, when the air conditioner water tray is self-cleaning, condensed water is used for freeze-thaw purification, which can achieve long-term purification. In this way, the air conditioner can adjust the flow path of the heat exchanger and optimize the fins without adding external purification devices. It uses the coordinated control of the existing compressor, fan and other actuators in the air conditioner and combines the system parameter control to realize the condensation, frosting, defrosting and drying processes of the water tray, thereby achieving the effects of condensation cleaning, freeze stripping, high-temperature sterilization, etc., that is, the water tray can be self-cleaned completely by the air conditioner itself, and it is efficient, long-lasting and requires no consumables.

[0196] In some embodiments, the control unit 104 controls at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger during the preset condensation process, so that the condensed water generated by the fins at the freezing function is cooled to room temperature. The cooling process includes:

[0197] The control unit 104 is further configured to determine the surface condensation temperature of the indoor heat exchanger according to the indoor ambient temperature of the air conditioner and the indoor ambient relative humidity of the air conditioner; wherein the surface condensation temperature of the indoor heat exchanger, such as the evaporator surface condensation temperature T 露 The specific functions and processing of the control unit 104 are also described in step S310.

[0198] The control unit 104 is further configured to reduce the speed of the indoor fan and / or increase the frequency of the compressor so that the freezing surface temperature of the indoor heat exchanger is less than or equal to the surface condensation temperature of the indoor heat exchanger. The specific functions and processing of the control unit 104 are further described in step S320.

[0199] The control unit 104 is further configured to maintain a set condensation time so that the condensed water generated by the fins at the freezing function is frozen. 露 The specific functions and processing of the control unit 104 are also described in step S330.

[0200] like Figure 13 As shown, a method for controlling the self-cleaning of a water tray of an air conditioner further includes the following steps:

[0201] During the cooling process of step 4, the speed of the fan and / or the operating frequency of the compressor in the air conditioner are adjusted. For example, by reducing the wind speed or increasing the compressor frequency, the evaporator tube temperature can be kept low. When the temperature is lower than the dew point temperature, condensed water is generated, so that condensation is generated between the fins 2 of the evaporator 7 and collected in the water receiving tray 1, including:

[0202] ① Obtain the current temperature and relative humidity of the indoor environment where the indoor unit is located through the ambient temperature and humidity sensor to determine the condensation temperature T on the evaporator surface 露 ;

[0203] ② Reduce the indoor unit fan speed and adjust the compressor operating frequency to control the evaporator surface temperature T, so that it remains below the indoor condensation temperature, that is, T≤T 露 The surface temperature of the evaporator is obtained by detecting the temperature sensor package;

[0204] ③ Maintain the condensation process on the evaporator surface for a certain time t 露 , to generate enough condensation water to contact and cover the entire waterway surface.

[0205] Preferably, the duration of condensation of the evaporator is t 露 5 minutes to 15 minutes.

[0206] In the solution of the present invention, during the execution of the preset condensation process, the speed of the indoor fan and at least one of the frequency of the compressor are controlled according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, so that the condensed water generated by the fins at the freezing function can quickly generate sufficient condensed water for condensation cleaning, which is conducive to improving the efficiency and effect of self-cleaning.

[0207] In some embodiments, the control unit 104 controls at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the freezing surface temperature of the indoor heat exchanger during the predetermined frosting process, so as to cause frost to form on the fin surface of the freezing function in the indoor heat exchanger, thereby freezing the condensed water collected in the water channel of the water receiving pan, including:

[0208] The control unit 104 is further configured to determine a corrected temperature of the indoor heat exchanger; wherein the corrected temperature of the indoor heat exchanger is such as the corrected temperature T 霜修正 The specific functions and processing of the control unit 104 are also described in step S410.

[0209] The control unit 104 is further configured to turn off the indoor fan or reduce the speed of the indoor fan, and / or increase the frequency of the compressor, so that the sum of the freezing surface temperature of the indoor heat exchanger and the correction temperature of the indoor heat exchanger is within the error range of the set frosting target temperature of the indoor heat exchanger; wherein the error range of the set frosting target temperature of the indoor heat exchanger, such as the frosting target temperature T 霜 -1℃ to frost target temperature T 霜 +1° C. The specific functions and processing of the control unit 104 are shown in step S420 .

[0210] The control unit 104 is further configured to maintain a set frosting time so that frost forms on the fin surface of the freezing function in the indoor heat exchanger, thereby freezing the condensed water collected in the water channel of the water receiving tray. 霜 The specific functions and processing of the control unit 104 are also described in step S430.

[0211] like Figure 13 As shown, a method for controlling the self-cleaning of a water tray of an air conditioner further includes the following steps:

[0212] During the frosting process in step 4, the indoor unit fan is turned off or the speed of the indoor unit fan and / or the operating frequency of the compressor is adjusted to cause frost to form on the surface of the main heat exchange area of the indoor unit evaporator, thereby achieving a freezing effect on the water channel, including:

[0213] ① Reduce the speed of the indoor fan or turn off the indoor fan, and adjust the operating frequency of the compressor. For example, by reducing or even turning off the fan speed or increasing the compressor frequency, the evaporator tube temperature can be kept low. When it is below zero degrees, frost will form. This is to control the surface temperature T of the evaporator's main heat exchange area so that it remains within a certain frosting target temperature range after freezing correction. The frosting target temperature range is T 霜 ±1℃, that is, T 霜 -1℃≤T+T 霜修正 ≤T 霜 +1℃. Specifically, when T 霜 -1℃-T 霜修正 ≥T, increase wind speed or reduce frequency, T≥T 霜 +1℃-T 霜修正 When the wind speed is reduced or the frequency is increased, T 霜 +1℃-T 霜修正 ≥T≥T 霜 -1℃-T 霜修正 Preferably, the frosting target temperature T 霜 The correction temperature T 霜修正 It is related to the extension of the heat exchanger's fins 2 in the water channel (including the equivalent extension depth and width), the thermal conductivity of the fins 2, etc., and is pre-set by the air conditioner manufacturer before leaving the factory.

[0214] ② Maintain the frosting process on the evaporator surface for a certain time t 霜 , so that the entire waterway surface can be frozen. Preferably, the duration of frost on the evaporator is t 霜 It is 10 minutes to 30 minutes.

[0215] In the solution of the present invention, when executing the preset frosting process, at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled according to the freezing surface temperature of the indoor heat exchanger, so that the fin surface of the freezing function in the indoor heat exchanger is frosted, and the condensed water gathered in the water channel of the water receiving tray is frozen, realizing freeze stripping, which is beneficial to improving the self-cleaning effect.

[0216] In some embodiments, the control unit 104 controls the air conditioner to turn off the cooling mode and turn on the heating mode during the preset defrosting and drying process, and controls at least one of the speed of the indoor fan and the frequency of the compressor according to the frozen surface temperature of the indoor heat exchanger to defrost the fin surface of the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving pan, including:

[0217] The control unit 104 is further configured to reduce the speed of the indoor fan and / or increase the frequency of the compressor so that the freezing surface temperature of the indoor heat exchanger is within the error range of the set defrost target temperature of the indoor heat exchanger; wherein the error range of the set defrost target temperature of the indoor heat exchanger, such as the defrost target temperature T 化 -2℃ to defrost target temperature T 化 +2° C. The specific functions and processing of the control unit 104 are shown in step S510 .

[0218] The control unit 104 is further configured to maintain a set defrost time to defrost the fin surface of the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving tray. The specific functions and processing of the control unit 104 are further described in step S520.

[0219] like Figure 13 As shown, a method for controlling the self-cleaning of a water tray of an air conditioner further includes the following steps:

[0220] During the defrosting and drying process in step 4, the air conditioner switches from cooling mode to heating mode by shutting down the compressor, reversing the direction of the four-way valve (i.e., the four-way valve in the outdoor unit), and restarting the compressor. The air conditioner fan speed and / or the operating frequency of the compressor are adjusted to increase the temperature of the fins 2 of the evaporator 7 to meet the frost melting conditions at the bottom of the water channel, thereby entering the defrosting and drying process, which includes:

[0221] ① Adjust the indoor unit fan speed and control the compressor operating frequency. For example, when heating, the evaporator tube temperature can be controlled by increasing the compressor frequency or reducing the wind speed to keep the evaporator surface temperature T within a certain defrost target temperature range. The defrost target temperature range is T 化 ±2℃, that is, T化 +2℃≥T≥T 化 -2℃. Specifically, when T 化 When -2℃≥T, reduce wind speed or increase frequency, T≥T 化 At +2℃, increase wind speed or reduce frequency, T 化 +2℃≥T≥T 化 At -2°C, the wind speed frequency remains unchanged. Preferably, the defrost target temperature T 化 It is 56℃~65℃.

[0222] ② Maintain the defrosting and drying process of the evaporator surface for a certain time t 化 , so that the frost layer between the fins and in the water receiving tray can be effectively melted and fully dried.

[0223] Preferably, the duration of the evaporator defrosting and drying is t 化 30-40 minutes.

[0224] In the solution of the present invention, during the preset defrosting and drying process, the air conditioner is controlled to turn off the cooling mode and turn on the heating mode. According to the freezing surface temperature of the indoor heat exchanger, at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled to defrost the surface of the fins at the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer in the water channel frozen in the water receiving tray. The self-cleaning effect can be further improved by high-temperature sterilization.

[0225] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0226] According to an embodiment of the present invention, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner may include: the control device of the air conditioner described above.

[0227] Figure 14 The figure is a schematic diagram of the structure of the water channel self-cleaning control device of the air conditioner. Figure 14 The present invention further provides an air conditioner control device for implementing the aforementioned control method. The control device includes a storage module, a processing module, and an air conditioner control program stored in the storage module and executable on the processing module. When the air conditioner control program is executed by the processing module, each step of the aforementioned air conditioner control method is implemented.

[0228] To achieve the above-mentioned purpose, the present invention further provides an air conditioner, which includes the above-mentioned waterway self-cleaning control device, and the waterway self-cleaning control device can implement the above-mentioned control method to achieve the effect to be achieved by the present invention.

[0229] To achieve the above objectives, the present invention further provides an air conditioner comprising the heat exchanger with the special-shaped fins and variable flow path and a control device, wherein the control device can be combined with the heat exchanger to implement the above control method to achieve the desired effect of the present invention.

[0230] Due to the adoption of the technical route of the present invention, the air conditioner can, without adding external purification devices, realize the condensation, frosting, defrosting and drying processes of the water receiving tray through heat exchanger flow adjustment and fin optimization, and the coordinated control of the compressor, fan and other actuators in the relevant scheme, combined with system parameter control, to achieve the effects of condensation cleaning, freeze stripping, high-temperature sterilization, etc., that is, the air conditioner can completely rely on itself to achieve self-cleaning of the water receiving tray, and it is efficient, long-lasting and requires no consumables.

[0231] Since the processing and functions implemented by the air conditioner of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0232] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided, including a computer program. When the computer program is executed by a processor, the steps of the air conditioner control method described above are implemented.

[0233] Since the processing and functions implemented by the product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0234] According to an embodiment of the present invention, a storage medium corresponding to the air conditioner control method is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the air conditioner control method described above.

[0235] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0236] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0237] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprising a compressor, the indoor unit comprising an indoor heat exchanger, an indoor fan, and a water receiving pan; the refrigerant flow path of the indoor heat exchanger has a heat exchange function and a freezing function, the heat exchange capacity of the freezing function being greater than the heat exchange capacity of the heat exchange function, and condensed water generated by the fins at the freezing function of the indoor heat exchanger can be collected in the water channel of the water receiving pan and frozen and defrosted and dried; The control method of the air conditioner comprises: After the air conditioner is powered on and a self-cleaning function for self-cleaning the water receiving pan is enabled, obtaining a contamination level of the water receiving pan, obtaining an indoor ambient temperature of the air conditioner, and obtaining an indoor ambient relative humidity of the air conditioner; and obtaining a temperature at a freezing function point of the indoor heat exchanger, recorded as a freezing surface temperature of the indoor heat exchanger; determining whether the water receiving tray needs to be self-cleaned according to the degree of contamination of the water receiving tray; If it is determined that the water receiving pan needs to be self-cleaned, a preset self-cleaning program is executed to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is gathered into the water channel of the water receiving pan and frozen and defrosted and dried, thereby achieving self-cleaning of the water receiving pan.

2. The air conditioner control method according to claim 1, characterized in that: The indoor unit also has a first three-way diverter, a second three-way diverter, and a four-way reversing device; the copper tube of the indoor heat exchanger has a refrigerant inlet pipe, a refrigerant outlet pipe and a refrigerant main pipe; wherein, The first three-way flow dividing device is provided at the connection between the refrigerant main pipe and the refrigerant outlet pipe; the second three-way flow dividing device is provided at the connection between the refrigerant inlet pipe and the refrigerant main pipe; the four-way reversing device is provided between the refrigerant inlet pipe and the refrigerant outlet pipe; The heat exchange area where the refrigerant main pipe is located includes: a first heat exchange area, a second heat exchange area and a third heat exchange area; the first heat exchange area and the third heat exchange area are located on both sides of the second heat exchange area; By controlling the first three-way diverter device, the second three-way diverter device, and the four-way reversing device, it is possible to control whether the refrigerant flow path corresponding to the corresponding heat exchange area in the first heat exchange area, the second heat exchange area, and the third heat exchange area belongs to the heat exchange function or the freezing function.

3. The air conditioner control method according to claim 1 or 2, characterized in that: in, In the indoor heat exchanger, the heat exchange function and the freezing function are connected in series and used together; and the fins at the freezing function in the indoor heat exchanger extend into the water channel of the water receiving pan; or, In the indoor heat exchanger, the heat exchange function and the freezing function are connected in parallel and used independently of each other, and the freezing function extends to the water channel of the water receiving pan.

4. The air conditioner control method according to any one of claims 1 to 3, characterized in that: The fin at the freezing function position in the indoor heat exchanger has an extension structure that is shaped like the water channel of the water receiving pan, and the extension structure can extend into the water channel of the water receiving pan.

5. The air conditioner control method according to any one of claims 1 to 4, characterized in that: Executing a preset self-cleaning program to: control the freezing function and at least one of the rotation speed of the indoor fan and the frequency of the compressor in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, so that condensed water generated by the fins at the freezing function in the indoor heat exchanger is collected in the water channel of the water receiving pan and is frozen and defrosted and dried, thereby achieving self-cleaning of the water receiving pan, including: The system executes a preset condensation process under a preset self-cleaning program: controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger so as to condense water generated by the fins at the freezing function; and controlling the freezing function so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is collected in the water channel of the water receiving pan; executing a preset frosting process: controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the freezing surface temperature of the indoor heat exchanger, so as to cause frost to form on the fin surface of the freezing function in the indoor heat exchanger, thereby freezing the condensed water collected in the water channel of the water receiving pan; Execute the preset defrosting and drying process: control the air conditioner to turn off the cooling mode and turn on the heating mode, and control at least one of the speed of the indoor fan and the frequency of the compressor according to the freezing surface temperature of the indoor heat exchanger to defrost the fin surface at the freezing function in the indoor heat exchanger, and then melt and dry the frost layer frozen in the water channel of the water receiving tray, exit the preset self-cleaning program, and complete the self-cleaning of the water receiving tray.

6. The air conditioner control method according to claim 5, characterized in that: According to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor so as to freeze the condensed water generated by the fins at the freezing function, the method comprises: determining a surface condensation temperature of the indoor heat exchanger according to an indoor ambient temperature of the air conditioner and an indoor relative humidity of the air conditioner; reducing the rotation speed of the indoor fan and / or increasing the frequency of the compressor so that the freezing surface temperature of the indoor heat exchanger is less than or equal to the surface condensation temperature of the indoor heat exchanger; Maintain the set condensation time to allow the condensed water generated by the fins to freeze.

7. The air conditioner control method according to claim 5 or 6, characterized in that: The method includes controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the freezing surface temperature of the indoor heat exchanger to cause frost to form on the fin surface of the freezing function portion of the indoor heat exchanger, thereby freezing the condensed water collected in the water channel of the water receiving pan, including: determining a corrected temperature of the indoor heat exchanger; Turning off the indoor fan or reducing the speed of the indoor fan, and / or increasing the frequency of the compressor, so that the sum of the freezing surface temperature of the indoor heat exchanger and the correction temperature of the indoor heat exchanger is within the error range of the set frosting target temperature of the indoor heat exchanger; The set frosting time is maintained to allow frost to form on the fin surface of the freezing function in the indoor heat exchanger, thereby freezing the condensed water collected in the water channel of the water receiving pan.

8. The air conditioner control method according to any one of claims 5 to 7, characterized in that: The air conditioner is controlled to turn off the cooling mode and turn on the heating mode, and at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled according to the frozen surface temperature of the indoor heat exchanger to defrost the fin surface of the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving pan, including: reducing the rotation speed of the indoor fan and / or increasing the frequency of the compressor so that the freezing surface temperature of the indoor heat exchanger is within an error range of a set defrost target temperature of the indoor heat exchanger; The set defrost time is maintained to defrost the fin surface of the freezing function in the indoor heat exchanger, thereby melting and drying the frost layer frozen in the water channel of the water receiving tray.

9. A control device for an air conditioner, characterized in that: The air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprising a compressor, the indoor unit comprising an indoor heat exchanger, an indoor fan, and a water receiving pan; the refrigerant flow path of the indoor heat exchanger has a heat exchange function and a freezing function, the heat exchange capacity of the freezing function being greater than the heat exchange capacity of the heat exchange function, and condensed water generated by the fins at the freezing function of the indoor heat exchanger can be collected in the water channel of the water receiving pan and frozen and defrosted and dried; the control device of the air conditioner comprises: an acquiring unit configured to, after the air conditioner is powered on and a self-cleaning function for self-cleaning the water receiving pan is enabled, acquire a contamination level of the water receiving pan, acquire an indoor ambient temperature of the air conditioner, and acquire an indoor ambient relative humidity of the air conditioner; and acquire a temperature at the freezing function point of the indoor heat exchanger, recorded as a freezing surface temperature of the indoor heat exchanger; a control unit configured to determine whether the water receiving tray needs to be self-cleaned according to the degree of contamination of the water receiving tray; The control unit is also configured to execute a preset self-cleaning program if it is determined that the water receiving pan needs to be self-cleaned, so as to: control the freezing function in combination with the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, and the freezing surface temperature of the indoor heat exchanger, and control at least one of the speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is gathered into the water channel of the water receiving pan and frozen and defrosted and dried, thereby achieving self-cleaning of the water receiving pan.

10. An air conditioner, characterized in that: include: The control device for an air conditioner as claimed in claim 9.

11. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the air conditioner control method according to any one of claims 1 to 8.

12. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the air conditioner control method according to any one of claims 1 to 8 are implemented.

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