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. A covering film is arranged on the surface of a water channel of a water pan to form a water channel covering film; the method comprises the steps that whether self-cleaning needs to be carried out or not is determined according to the pollution degree of the water pan; if it is determined that self-cleaning needs to be carried out, a preset self-cleaning program is executed, so that at least one of the indoor environment temperature, the indoor environment relative humidity, the freezing surface temperature of an indoor heat exchanger and the water film thickness of a water channel covering film of the air conditioner is combined, the freezing function is controlled, and the rotating speed of an indoor fan and the frequency of a compressor are controlled; condensate water generated by the freezing function in the indoor heat exchanger can be gathered to the surface of the water channel covering film and is frozen, defrosted and dried, and self-cleaning is achieved. According to the scheme, the water channel is covered with the film, condensate water is generated through the freezing function of the evaporator and enters the water pan, frosting and defrosting drying are carried out, self-cleaning is achieved, dirt and peculiar smell of the water channel are avoided, and human health is facilitated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to an air conditioner control method and device, an air conditioner, a storage medium and a computer program product, in particular to an air conditioner water channel self-cleaning control method and device, an air conditioner, a storage medium and a computer program product. BACKGROUND

[0002] Condensate water is generated during the operation of an air conditioner, collected by a water pan (also known as a water channel), and then discharged to the outside through a drain pipe. With the extension of the use time, a large amount of dust and pollutants will inevitably accumulate inside the water channel, and 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 can secrete a kind of mucus, which is like an adhesive, adheres to dust, particles and other substances, and forms a sticky and paste-like deposit, which adheres to the surface of the water channel film, affecting the normal use of the air conditioner. The industry calls it biological slime, as shown in Figure 7 Figure 7 The air conditioner water channel biological slime pollution status diagram, wherein (a) is the present situation Figure 1 , (b) is the present situation Figure 2 .

[0003] The accumulation of dust and the breeding of bacteria and other microorganisms are the key to the above problems. Due to the narrow structure of the water channel, it is difficult to clean dust and other pollutants by external force unless the machine is disassembled. However, disassembly and cleaning is obviously not realistic in terms of economy and operability, so the treatment means in the related scheme is mainly to inhibit the breeding of microorganisms by carrying out antibacterial treatment on the water channel of the air conditioner, thereby controlling the problem of water channel pollution. However, the antibacterial water channel of the air conditioner in the related scheme cannot solve the problem of dirty odor of the water channel of the air conditioner, which is not conducive to human health.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as related solutions. SUMMARY

[0005] The purpose of the present application is to provide an air conditioner control method, device, air conditioner, storage medium and computer program product, to solve the problem that the antibacterial water channel of the air conditioner cannot solve the problem of dirty odor of the water channel of the air conditioner, which is not conducive to human health, to achieve the effect of self-cleaning by making the water channel film, using the freezing function of the evaporator to generate condensate water into the water pan, and carrying out frosting and defrosting drying, avoiding dirty odor of the water channel, and being conducive to human health.

[0006] ​The application provides a control method of an air conditioner, the air conditioner has an outdoor unit and an indoor unit, the outdoor unit has a compressor, the indoor unit has an indoor heat exchanger, an indoor fan and a water pan; a film is arranged on the water channel surface of the water pan to form a water channel film; the refrigerant flow path of the indoor heat exchanger has a freezing function, the condensed water generated by the freezing function can be gathered on the surface of the water channel film and undergo freezing, defrosting and drying; the control method of the air conditioner comprises the following steps: after the air conditioner is powered on, and in the case that a self-cleaning function for cleaning the water pan is turned on, the pollution degree of the water pan is obtained, the indoor environment temperature of the air conditioner is obtained, the indoor environment relative humidity of the air conditioner is obtained; the freezing surface temperature of the indoor heat exchanger is obtained; and the thickness of the water film formed on the water channel film is obtained, which is recorded as the water film thickness of the water channel film; whether the water pan needs to be cleaned is determined according to the pollution degree of the water pan; if it is determined that the water pan needs to be cleaned, a preset self-cleaning program is executed to: control the freezing function in combination with the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger and the water film thickness of the water channel film, and control at least one of the rotating speed of the indoor fan and the frequency of the compressor, so that the condensed water generated by the freezing function in the indoor heat exchanger can be gathered on the surface of the water channel film and undergo freezing, defrosting and drying, thereby realizing self-cleaning of the water pan.

[0007] In some embodiments, the water channel film can be directly in contact with the air inlet surface of the indoor heat exchanger and / or the bottom end of the indoor heat exchanger.

[0008] In some embodiments, the film arranged on the water channel surface of the water pan to form the water channel film comprises the following steps: a preset copper foil is arranged on the water channel surface of the water pan by bonding or insert molding to form the water channel film; or, after the preset copper foil is arranged on the water channel surface of the water pan by bonding or insert molding, a preset anticorrosive coating is coated to form the water channel film.

[0009] In some embodiments, the preset self-cleaning program is executed to control the freezing function and 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 ambient relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film, so that the condensed water generated by the freezing function in the indoor heat exchanger can be collected on the surface of the waterway film and frozen, defrosted, and dried, thereby achieving self-cleaning of the water pan. The preset self-cleaning program includes: executing a preset condensation process based on the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film, to 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 of the freezing function; and controlling the freezing function to cause the condensed water generated by the fins of the freezing function in the indoor heat exchanger to be collected on the waterway film; executing a preset frosting process based on the freezing surface temperature of the indoor heat exchanger, to control at least one of the rotation speed of the indoor fan and the frequency of the compressor, so that the fins of the freezing function in the indoor heat exchanger frost, thereby causing the condensed water collected on the waterway film to freeze; executing a preset defrosting process to control the air conditioner to turn off the cooling mode and turn on the heating mode, and to control at least one of the rotation speed of the indoor fan and the frequency of the compressor based on the freezing surface temperature of the indoor heat exchanger, so that the fins of the freezing function in the indoor heat exchanger defrost, causing the frost layer frozen on the waterway film to melt; executing a preset cycle freezing and peeling process based on the degree of contamination of the water pan, to cyclically execute the preset frosting process and the preset defrosting process; executing a preset drying process to dry the defrosted water on the waterway film, and then exiting the preset self-cleaning program to complete the self-cleaning of the water pan.

[0010] In some embodiments, the method of controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to make the condensed water generated by the fins at the freezing function of the indoor heat exchanger cover the surface of the waterway film according to the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film comprises: determining the surface dewing temperature of the indoor heat exchanger according to the indoor environment temperature of the air conditioner and the indoor environment relative humidity of the air conditioner; reducing the rotation speed of the indoor fan and / or increasing the frequency of the compressor to make the freezing surface temperature of the indoor heat exchanger less than or equal to the surface dewing temperature of the indoor heat exchanger; and recording the continuous condensation time of the preset condensation process; determining whether the water film thickness of the waterway film is greater than the preset target water film thickness and the continuous condensation time of the preset condensation process is greater than the preset maximum condensation time; if it is determined that the conditions are met, ending the preset condensation process; if it is determined that the conditions are not met, returning to continue the execution of the preset condensation process to make the condensed water generated by the fins at the freezing function of the indoor heat exchanger cover the surface of the waterway film.

[0011] In some embodiments, the method of controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to make the condensed water generated by the fins at the freezing function of the indoor heat exchanger cover the surface of the waterway film according to the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film comprises: determining the surface dewing temperature of the indoor heat exchanger according to the indoor environment temperature of the air conditioner and the indoor environment relative humidity of the air conditioner; reducing the rotation speed of the indoor fan and / or increasing the frequency of the compressor to make the freezing surface temperature of the indoor heat exchanger less than or equal to the surface dewing temperature of the indoor heat exchanger; and recording the continuous condensation time of the preset condensation process; determining whether the water film thickness of the waterway film is greater than the preset target water film thickness and the continuous condensation time of the preset condensation process is greater than the preset maximum condensation time; if it is determined that the conditions are met, ending the preset condensation process; if it is determined that the conditions are not met, returning to continue the execution of the preset condensation process to make the condensed water generated by the fins at the freezing function of the indoor heat exchanger cover the surface of the waterway film.

[0012] In some embodiments, the method of controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to make the condensed water generated by the fins at the freezing function of the indoor heat exchanger cover the surface of the waterway film according to the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film comprises: determining the surface dewing temperature of the indoor heat exchanger according to the indoor environment temperature of the air conditioner and the indoor environment relative humidity of the air conditioner; reducing the rotation speed of the indoor fan and / or increasing the frequency of the compressor to make the freezing surface temperature of the indoor heat exchanger less than or equal to the surface dewing temperature of the indoor heat exchanger; and recording the continuous condensation time of the preset condensation process; determining whether the water film thickness of the waterway film is greater than the preset target water film thickness and the continuous condensation time of the preset condensation process is greater than the preset maximum condensation time; if it is determined that the conditions are met, ending the preset condensation process; if it is determined that the conditions are not met, returning to continue the execution of the preset condensation process to make the condensed water generated by the fins at the freezing function of the indoor heat exchanger cover the surface of the waterway film.

[0013] In some embodiments, wherein, according to the degree of contamination of the water pan, the preset frosting process and the preset defrosting process are executed in cycles, comprising: after the execution of the preset frosting process and the preset defrosting process, the number of cleaning times of the water pan is accumulated by 1 to obtain the accumulated number of cleaning times of the water pan; according to the degree of contamination of the water pan, it is determined whether the water pan is cleaned thoroughly; and it is determined whether the accumulated number of cleaning times of the water pan is greater than a preset number; if it is determined that the water pan is not cleaned thoroughly and the accumulated number of cleaning times of the water pan is less than or equal to the preset number, it is returned to continue the execution of the preset frosting process and the preset defrosting process; if it is determined that the water pan is cleaned thoroughly or the accumulated number of cleaning times of the water pan is greater than the preset number, the execution of the preset frosting process and the preset defrosting process is ended to execute a preset drying process; and / or the defrosting water on the water channel film is dried, and then the preset self-cleaning program is exited to complete the self-cleaning of the water pan, comprising: reducing the rotation speed of the indoor fan and / or increasing the frequency of the compressor to make the frozen surface temperature of the indoor heat exchanger within the error range of the set defrosting target temperature of the indoor heat exchanger; maintaining the set defrosting time to defrost the fin surface at the frozen function of the indoor heat exchanger, and then to dry the defrosting water frozen on the water channel film.

[0014] According to the method, the application provides a control device of an air conditioner. The air conditioner has an outdoor unit and an indoor unit. The outdoor unit has a compressor. The indoor unit has an indoor heat exchanger, an indoor fan and a water pan. A film is arranged on the water channel surface of the water pan to form a water channel film. The refrigerant flow path of the indoor heat exchanger has a freezing function. The condensed water generated by the freezing function can be collected on the surface of the water channel film and undergo freezing, defrosting and drying. The control device of the air conditioner comprises: an acquisition unit configured to acquire the contamination degree of the water pan after the air conditioner is powered on and when the self-cleaning function of the water pan is turned on, acquire the indoor environment temperature of the air conditioner, acquire the indoor environment relative humidity of the air conditioner, acquire the freezing surface temperature of the indoor heat exchanger and acquire the thickness of the water film formed on the water channel film, which is referred to as the water film thickness of the water channel film; and a control unit configured to determine whether the self-cleaning of the water pan is needed according to the contamination degree of the water pan. If it is determined that the self-cleaning of the water pan is needed, the control unit executes a preset self-cleaning program to control the freezing function, the rotation speed of the indoor fan and at least one of the frequency of the compressor in combination with the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger and the water film thickness of the water channel film, so that the condensed water generated by the freezing function of the indoor heat exchanger can be collected on the surface of the water channel film and undergo freezing, defrosting and drying, thereby realizing the self-cleaning of the water pan.

[0015] In some embodiments, the water channel film can be directly in contact with the air inlet surface of the indoor heat exchanger and / or the bottom end of the indoor heat exchanger.

[0016] In some embodiments, the water channel film arranged on the water channel surface of the water pan comprises: arranging a preset copper foil on the water channel surface of the water pan by bonding or insert molding to form the water channel film; or arranging a preset copper foil on the water channel surface of the water pan by bonding or insert molding, and then coating a preset anticorrosive coating layer to form the water channel film.

[0017] In some embodiments, the control unit executes 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 based on the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film, so that the condensed water generated by the freezing function in the indoor heat exchanger can be collected on the surface of the waterway film and frozen, defrosted, and dried, thereby achieving self-cleaning of the water pan. The preset self-cleaning program includes: executing a preset condensation process to control 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 ambient relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film, so that the condensed water generated by the fins of the freezing function; and controlling the freezing function so that the condensed water generated by the fins of the freezing function in the indoor heat exchanger is collected on the waterway film; executing a preset frosting process to control at least one of the rotation speed of the indoor fan and the frequency of the compressor based on the freezing surface temperature of the indoor heat exchanger, so that the fins of the freezing function in the indoor heat exchanger frost, thereby causing the condensed water collected on the waterway film to freeze; executing a preset defrosting process to control the air conditioner to turn off the cooling mode and turn on the heating mode, and to control at least one of the rotation speed of the indoor fan and the frequency of the compressor based on the freezing surface temperature of the indoor heat exchanger, so that the fins of the freezing function in the indoor heat exchanger defrost, causing the frost layer frozen on the waterway film to melt; executing a preset cycle freezing and peeling process to cyclically execute the preset frosting process and the preset defrosting process based on the contamination degree of the water pan; executing a preset drying process to dry the defrosting water on the waterway film, and then exiting the preset self-cleaning program to complete the self-cleaning of the water pan.

[0018] 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, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film, to make the condensed water generated by the fins at the freezing function include: determining the surface dewing 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 to make the freezing surface temperature of the indoor heat exchanger less than or equal to the surface dewing temperature of the indoor heat exchanger; and recording the continuous condensation time of the preset condensation process; determining whether the water film thickness of the waterway film is greater than the preset target water film thickness and the continuous condensation time of the preset condensation process is greater than the preset maximum condensation time; if it is determined that the conditions are met, the preset condensation process is ended; if it is determined that the conditions are not met, the preset condensation process is continued to be executed to make the condensed water generated by the fins at the freezing function cover the surface of the waterway film.

[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 freezing surface temperature of the indoor heat exchanger to make the fins at the freezing function in the indoor heat exchanger frost, and in turn make the condensed water gathered on the waterway film freeze, including: determining the correction 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 to make the sum of the freezing surface temperature of the indoor heat exchanger and the correction temperature of the indoor heat exchanger within the error range of the set frosting target temperature of the indoor heat exchanger; maintaining the set frosting time to make the fins at the freezing function in the indoor heat exchanger frost, and in turn make the condensed water gathered on the waterway film freeze; and / or the control unit controls the air conditioner to turn off the cooling mode and turn on the heating mode, 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 to make the fins at the freezing function in the indoor heat exchanger defrost, and in turn make the frost layer frozen on the waterway film melt, including: reducing the rotation speed of the indoor fan and / or increasing the frequency of the compressor to make the freezing surface temperature of the indoor heat exchanger within the error range of the set defrosting target temperature of the indoor heat exchanger; maintaining the set defrosting time to make the fins at the freezing function in the indoor heat exchanger defrost, and in turn make the frost layer frozen on the waterway film melt.

[0020] In some embodiments, the control unit, according to the contamination degree of the water pan, cyclically performs the preset frosting process and the preset defrosting process, including: after performing the preset frosting process and the preset defrosting process, accumulating the number of cleaning times of the water pan by 1 to obtain the accumulated number of cleaning times of the water pan; determining whether the water pan is cleaned completely according to the contamination degree of the water pan; and determining whether the accumulated number of cleaning times of the water pan is greater than a preset number; if it is determined that the water pan is not cleaned completely and the accumulated number of cleaning times of the water pan is less than or equal to the preset number, returning to continue performing the preset frosting process and the preset defrosting process; if it is determined that the water pan is cleaned completely or the accumulated number of cleaning times of the water pan is greater than the preset number, ending the execution of the preset frosting process and the preset defrosting process to perform the preset drying process; and / or the control unit performs drying on the defrosting water on the water channel film, and then exits the preset self-cleaning program to complete the self-cleaning of the water pan, including: reducing the rotating speed of the indoor fan and / or increasing the frequency of the compressor to make the freezing surface temperature of the indoor heat exchanger within the error range of the set defrosting target temperature of the indoor heat exchanger; maintaining the set defrosting time to defrost the fin surface at the freezing function in the indoor heat exchanger, and then make the defrosting water frozen on the water channel film be dried.

[0021] In order to achieve the above object, the present application provides a control device of an air conditioner, which is matched with the above device, and includes the above control device of an air conditioner.

[0022] In order to achieve the above object, the present application provides a control device of an air conditioner, which is matched with the above device, and includes the above control device of an air conditioner.

[0023] In order to achieve the above object, the present application provides a control device of an air conditioner, which is matched with the above device, and includes the above control device of an air conditioner.

[0024] Therefore, the scheme of the present application is that a water channel film (such as a water channel film formed by adhering or injection molding a copper foil on the water channel, setting a copper foil on the water channel and then coating an anticorrosive layer, etc.) is coated on the water channel of the indoor unit of the air conditioner; in the case that the air conditioner is started and runs in a cooling mode, it is judged whether the self-cleaning program of the air conditioner needs to be started; in the case that the self-cleaning program of the air conditioner needs to be started, in the condensation process: the freezing function is started, and at least one of the rotating speed of the indoor fan and the frequency of the compressor is adjusted to make the condensate water generated by the freezing function gather into the water pan in combination with the water film thickness on the water channel film; in the frosting process: at least one of the rotating speed of the indoor fan and the frequency of the compressor is adjusted to make the water channel film surface of the water pan freeze; in the defrosting and drying process: the cooling mode is switched to the heating mode, and at least one of the rotating speed of the indoor fan and the frequency of the compressor is adjusted to make the water channel film surface temperature recover to above 0℃, so as to defrost and dry the water channel; and then the self-cleaning program is exited: the freezing function is turned off, and the heat exchange function is started; thus, the water channel film is used to realize self-cleaning by making the condensate water generated by the freezing function of the evaporator gather into the water pan, and frosting and defrosting and drying are performed, so as to avoid the water channel being dirty and smelly, and be beneficial to human health.

[0025] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application.

[0026] The technical scheme of the present application will be further described in detail below with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Flowchart of an embodiment of the control method of the air conditioner of the present application;

[0028] Figure 2 Flowchart of an embodiment of the method of the present application for making the condensate water generated by the freezing function of the indoor heat exchanger gather to the water channel film surface and freeze, defrost and dry;

[0029] Figure 3 Flowchart of an embodiment of the method of the present application for making the condensate water generated by the fins at the freezing function;

[0030] Figure 4 Flowchart of an embodiment of the method of the present application for making the fins surface at the freezing function of the indoor heat exchanger frost;

[0031] Figure 5 Flowchart of an embodiment of the method of the present application for making the frost layer frozen to the water channel film melt;

[0032] Figure 6Fig. 1 is a flow chart of an embodiment of the method of the present application, wherein a preset defrosting process and a preset frosting process are cyclically performed;

[0033] Figure 7 Fig. 2 is a flow chart of an embodiment of the method of the present application, wherein the defrosting water on the water channel film is dried;

[0034] Figure 8 Fig. 3 is a structure diagram of an embodiment of the control device of the air conditioner of the present application;

[0035] Figure 9 Fig. 4 is a biological slime pollution status diagram of the water channel of the air conditioner, wherein (a) is the status of the water channel of the air conditioner, and (b) is the status of the water channel of the air conditioner; Figure 1 Figure 2

[0036] Figure 10 Fig. 5 is a schematic diagram of an air conditioner with a water pan self-cleaning function;

[0037] Figure 11 Fig. 6 is a structure diagram of a water channel film scheme;

[0038] Figure 12 Fig. 7 is a flow chart of a water channel self-cleaning control method of an air conditioner;

[0039] Figure 13 Fig. 8 is a structure diagram of a water channel self-cleaning control device of an air conditioner.

[0040] In combination with the drawings, the following are the meanings of the reference signs in the embodiments of the present application:

[0041] 1 - water pan; 2 - fin; 3 - copper pipe; 4 - air inlet; 5 - air outlet; 6 - evaporator; 61 - evaporator air inlet face; 62 - evaporator bottom end; 8 - inner fan; 9 - aluminum foil water channel (conducting cold energy); 10 - air conditioner bottom shell; 102 - acquisition unit; 104 - control unit. DETAILED DESCRIPTION

[0042] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] ​​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 channels to inhibit microbial growth. However, contact-based antibacterial methods, such as treating the surface material of the water channel coating, have limited effectiveness, especially when the coating 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. Moreover, even if the problem of microbial contamination is solved, the presence of dust can still cause blockage and odor. In short, the related proposals completely solve the problem of contaminated air conditioner water channels.

[0044] 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 in these solutions, both the dirty and clean evaporator bodies are evaporators, making this easier to achieve. However, the distance between the water channel and the evaporator prevents heat from being smoothly transferred to the water channel due to air insulation, preventing the desired self-cleaning effect.

[0045] 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; in addition, the evaporator self-cleaning technology in related solutions cannot achieve the cleaning effect on the water channels.

[0046] 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, which adopts water channel freezing and stripping technology to provide a high-efficiency, long-lasting and non-consumable air conditioner water channel purification solution based on the natural process of structural damage caused by water freezing and expansion (thermal expansion and contraction). By coating the water channel in the air conditioner (such as covering the surface of the water channel coating with copper foil) and combining the air conditioner's own control program to perform freezing and 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's water channel and is beneficial to human health.

[0047] Among them, in the waterway freeze-stripping technology, the freeze-thaw stripping principle of the waterway mud material is a natural process that uses the freezing expansion of water (thermal expansion and cold contraction) to cause structural damage, as follows:

[0048] 1) Water freeze expansion: Water in the clay freezes at low temperatures, expanding in volume by about 9%, generating internal pressure. This pressure exceeds the tensile strength of the clay, causing cracks to form.

[0049] 2) Crack propagation and peeling: Cracks propagate during repeated freeze-thaw cycles, eventually causing the clay layer to peel off the waterway inner wall. This process is similar to ice wedge action in rock weathering, but the clay material is softer and the effect is more pronounced.

[0050] 3) Effect of repeated freeze-thaw cycles: Frequent freeze-thaw cycles exacerbate the damage, with each freeze increasing the expansion pressure, eventually leading to complete peeling. Larger temperature differences and frequent temperature changes accelerate this process.

[0051] 4) Effect of water flow scouring: After the clay material freezes and peels off, it is washed away by the defrosting water during the air conditioner defrosting process.

[0052] According to an embodiment of the present application, a control method of an air conditioner is provided, as shown in Figure 1 The flowchart of an embodiment of the method of the present application. The air conditioner has an outdoor unit and an indoor unit, the outdoor unit has a compressor, the indoor unit has an indoor heat exchanger, an indoor fan and a water pan; The waterway surface of the water pan is provided with a film to form a waterway film; The refrigerant flow path of the indoor heat exchanger has a freezing function, and the condensed water generated by the freezing function can be collected on the surface of the waterway film and frozen, defrosted and dried, wherein the water pan is as Figure 10 The waterway film is as Figure 11 The aluminum foil waterway 9 in Figure 1 As shown in the scheme, the control method of the air conditioner comprises steps S110 to S130.

[0053] At step S110, after the air conditioner is powered on, and the self-cleaning function for self-cleaning of the water pan is turned on, the degree of contamination of the water pan is obtained, the indoor environment temperature of the air conditioner is obtained, the indoor environment relative humidity of the air conditioner is obtained; The freezing surface temperature of the indoor heat exchanger is obtained; and in the case of forming a water film on the waterway film, the thickness of the water film formed on the waterway film is obtained, recorded as the water film thickness of the waterway film.

[0054] At step S120, according to the degree of contamination of the water pan, it is determined whether the water pan needs to be self-cleaned.

[0055] At step S130, if it is determined that the water pan needs to be self-cleaned, a preset self-cleaning program is executed to control the freezing function in combination with the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the frozen surface temperature of the indoor heat exchanger, and the water film thickness of the waterway coating, and to 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 freezing function in the indoor heat exchanger can be collected on the surface of the waterway coating and frozen, defrosted, and dried, thereby achieving self-cleaning of the water pan.

[0056] The scheme of the present application provides a waterway self-cleaning control method of an air conditioner, which adopts an efficient and durable air conditioner waterway purification scheme based on the natural process of water freezing expansion (thermal expansion and contraction) leading to structural damage, and realizes self-cleaning effect of the waterway through freezing peeling, condensation flushing, high-temperature sterilization, etc. of the waterway coating (such as copper foil covered on the surface of the waterway coating) in combination with the control program of the air conditioner itself, which can better solve the dirt problem of the waterway of the air conditioner and is beneficial to human health.

[0057] In some embodiments, the waterway coating can be in direct contact with the air inlet face of the indoor heat exchanger and / or the bottom end of the indoor heat exchanger.

[0058] Figure 10 It is a schematic diagram of an air conditioner with a water pan self-cleaning function. As shown in Figure 10 The air conditioner includes an indoor unit and an outdoor unit. The indoor unit has an air inlet 4, an indoor fan 8, and an air outlet 5. The water pan 1 and the environmental parameter detection device (such as a temperature and humidity sensor) are arranged in the air duct connected with the air inlet 4 and the air outlet 5. The outdoor unit has a compressor, an outdoor fan, and a condenser. The environmental parameter detection device includes an air quality detection unit and an air temperature and humidity detection unit. The air quality detection unit is used to detect the indoor air quality, including a PM2.5 sensor and a microorganism sensor. The air temperature and humidity detection unit is used to detect the indoor temperature and humidity, including a temperature sensor, a humidity sensor, or a temperature and humidity sensor. The evaporator 6 is installed above the water pan 1, and the evaporator 6 has a copper pipe 3 and a fin 2. When the air conditioner is running in cooling mode, the evaporator 6 will produce condensed water, which will flow down along the fin 2 of the evaporator 6, collect in the water pan 1, flow from the high position of the water pan to the low position of the water pan, and finally be discharged to the outside through the drain pipe of the air conditioner. Optionally, the drain has a controllable valve, and the presence or absence of condensed water in the water pan 1 can be controlled by opening or closing the valve.

[0059] The environmental parameter detection device is an air quality detection unit and an air temperature and humidity detection unit. The air quality detection unit is used for detecting indoor environmental air quality and includes a PM2.5 sensor, a microorganism sensor and the like. The air temperature and humidity detection unit is used for detecting indoor environmental temperature and humidity and includes a temperature sensor, a humidity sensor or a temperature and humidity sensor and the like. The water channel liquid film thickness and icing detection unit is used for judging whether the water thickness in the water channel meets the freezing requirement and whether the accumulated water is iced, such as judging by detecting temperature, judging by infrared temperature measurement, even judging by camera recognition and the like. A heat exchanger (such as an evaporator 6) is installed above the water pan 1. The heat exchanger will generate condensed water when the air conditioner is running in the refrigeration mode, and the condensed water will flow down along the fins 2 of the heat exchanger, gather into the water pan 1 and finally be discharged to the outside through the air conditioner drain pipe. The water channel film coating scheme adopts a copper foil, and the copper foil body has excellent antibacterial and heat conduction performance, which can meet the requirements of the freeze-off technology.

[0060] Figure 11 The structure diagram of the water channel film coating scheme is shown in FIG. 1. Figure 11 As shown in FIG. 1, after the copper foil film is bonded on the water channel, a copper foil water channel 9 is formed. The copper foil water channel 9 can also conduct cold energy, and the high heat transfer area is conducive to the freezing of water at the bottom of the copper water channel. The water channel is located on the bottom shell 10 of the air conditioner, and the copper foil film on the water channel directly contacts the evaporator air inlet surface 61 and the evaporator bottom end 62 to fit the water channel and change the surface of the plastic bottom shell into copper material. Thus, the condensed water can be conveniently collected to realize self-cleaning.

[0061] In some embodiments, a film is arranged on the water channel surface of the water pan to form a water channel film, including: arranging a predetermined copper foil on the water channel surface of the water pan by bonding or insert molding to form the water channel film. Alternatively, after the predetermined copper foil is arranged on the water channel surface of the water pan by bonding or insert molding, a predetermined corrosion-resistant coating is coated to form the water channel film.

[0062] Specifically, the copper foil film coating technology uses a copper foil material with moderate thickness (usually 0.1mm to 0.5mm) and excellent heat conduction performance. The width and length of the copper foil are customized according to the specific size of the water channel, because the bottom shell structure of each air conditioner is different, and the copper foil is required to be completely attached to the bottom shell structure during film coating. Adhesive: a high-temperature-resistant and corrosion-resistant adhesive (which requires a certain period of time for adhesion or certain conditions for adhesion, and is in a liquid state before adhesion) is selected, such as adhesive, to ensure that the copper foil does not fall off in the high-temperature and high-humidity environment of the air conditioner operation. After the copper foil is cleaned and dried, the adhesive is applied to the back, the copper foil is attached to the water channel, and the water channel and the copper foil are completely attached in shape using a mold pressing. Under certain conditions (such as heating conditions), the adhesive completes the adhesion, and the water channel film coating process is completed. Among them, the mold pressing can use a plastic injection mold. Plastic injection is usually divided into male and female molds: the male mold is the protruding structure in the mold, which is used to form the outer surface of the product; the female mold is the recessed structure in the mold, which is used to form the inner surface of the product. During mold pressing, the already formed plastic bottom shell is used to press the recessed structure in the water channel, and another relatively matched male mold is additionally provided to press it in. Preferably, the male mold has a heating function to provide the corresponding temperature for the glue heat curing. The related scheme adopts the way of extending the fin to transfer cold, and the scheme of the present application adopts the way of copper film coating to transfer cold.

[0063] The scheme of the present application provides a water channel based on material film coating and an air conditioner with the same, which uses an adhesive that needs to be cured as the adhesive material, so that the water channel and the film coating material are completely attached before curing, achieving better adhesion effect.

[0064] In some alternative embodiments, a corrosion-resistant coating such as epoxy resin, acrylic resin, and polyurethane coating can be applied to the surface of the copper foil to improve the long-term reliability of the film coating scheme. In addition to the above methods, insert injection molding and other methods can also be used to make the copper foil tightly fixed with the water channel of the heat exchanger bottom shell. Both the upper and lower water channels of the heat exchanger bottom shell can use the film coating scheme to achieve long-term self-cleaning of the air conditioner water pan using condensate water and freeze-thaw purification scheme, and ensure the cleaning effect.

[0065] In some embodiments, a preset self-cleaning program is executed to: in combination with the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the frozen surface temperature of the indoor heat exchanger, and the water film thickness of the water channel film coating, control the freezing function, and control at least one of the rotation speed of the indoor fan and the frequency of the compressor, so that the condensate water generated by the freezing function in the indoor heat exchanger can be collected on the surface of the water channel film coating and frozen, defrosted, and dried, to realize the specific process of self-cleaning of the water pan, see the following exemplary description.

[0066] The following will be described in combination with Figure 2An embodiment flowchart of the method of the present application is shown, which enables the condensed water generated by the freezing function in the indoor heat exchanger to be collected on the water channel film surface and frozen, defrosted and dried, further illustrating the specific process of enabling the condensed water generated by the freezing function in the indoor heat exchanger to be collected on the water channel film surface and frozen, defrosted and dried in step S130, including steps S210 to S250.

[0067] Step S210, performing a preset condensation process under a preset self-cleaning program: according to the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel film, controlling at least one of the rotation speed of the indoor fan and the frequency of the compressor to enable the condensed water generated by the fins at the freezing function; and, controlling the freezing function to enable the condensed water generated by the fins at the freezing function in the indoor heat exchanger to be collected on the water channel film.

[0068] Step S220, performing 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 enable the fins at the freezing function in the indoor heat exchanger to frost, and in turn enable the condensed water collected on the water channel film to freeze.

[0069] Step S230, performing a preset defrosting process: controlling the air conditioner to close the cooling mode and open 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 enable the fins at the freezing function in the indoor heat exchanger to defrost, and in turn enable the frost layer frozen on the water channel film to melt.

[0070] Step S240, performing a preset cycle freezing stripping process: according to the contamination degree of the water pan, cyclically performing the preset frosting process and the preset defrosting process.

[0071] Step S250, performing a preset drying process: drying the defrosting water on the water channel film, and then exiting the preset self-cleaning program, completing the self-cleaning of the water pan.

[0072] In the scheme of the present application, the freezing function is controlled in combination with the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, and at least one of the rotating speed of the indoor fan and the frequency of the compressor is controlled, so that the condensed water generated by the freezing function in the indoor heat exchanger can be collected on the surface of the water channel coating and frozen, defrosted and dried, realizing self-cleaning of the water pan, better solving the dirt problem of the water channel of the air conditioner, and being beneficial to human health.

[0073] In some embodiments, at least one of the rotating speed of the indoor fan and the frequency of the compressor is controlled in step S210 according to the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, so that the specific process of the condensed water generated by the fins at the freezing function, see the following exemplary description.

[0074] The following will be described in combination with Figure 3 An embodiment flowchart of the condensed water generated by the fins at the freezing function in the method of the present application is shown in the following, which further illustrates the specific process of the condensed water generated by the fins at the freezing function in step S210, including steps S310 to S350.

[0075] In step S310, the surface dewing temperature of the indoor heat exchanger is determined according to the indoor environment temperature of the air conditioner and the indoor environment relative humidity of the air conditioner.

[0076] In step S320, the rotating speed of the indoor fan is reduced, and / or the frequency of the compressor is increased, so that the freezing surface temperature of the indoor heat exchanger is less than or equal to the surface dewing temperature of the indoor heat exchanger; and the continuous dewing time of the preset dewing process is recorded.

[0077] In step S330, it is determined whether the water film thickness of the water channel coating is greater than the preset target water film thickness, and the continuous dewing time of the preset dewing process is greater than the preset longest dewing time. Wherein, the continuous dewing time of the preset dewing process is, for example, a certain time t of the evaporator surface dewing process. 露 The preset longest dewing time is, for example, the longest duration t0 of the evaporator dewing.

[0078] In step S340, if it is determined to be satisfied, the preset dewing process is ended.

[0079] In step S350, if it is determined to be not satisfied, it is returned to continue to execute the preset dewing process, so that the condensed water generated by the fins at the freezing function can cover the surface of the water channel coating.

[0080] Figure 12 A flowchart of a water channel self-cleaning control method of an air conditioner. In order to achieve the above-mentioned purpose, as shown in the combination of the above-mentioned heat exchanger, the scheme of the present application provides a water pan self-cleaning control scheme of an air conditioner. As shown in the combination of the above-mentioned heat exchanger, Figure 12 Figure 12 The water channel self-cleaning control method of an air conditioner includes the following steps:

[0081] Step 1, the air conditioner is powered on and operated, and then step 2 or step 3 is executed.

[0082] Step 2, obtain the user's water pan self-cleaning instruction, and then execute step 3.

[0083] Step 3, detect the pollution degree of the water pan of the air conditioner and determine whether to run the self-cleaning program: if yes, execute step 4, otherwise execute step 5.

[0084] In step 3, the pollution degree P of the water pan is determined by combining the cumulative running time t of the air conditioner and the indoor average pollutant concentration C in the corresponding time period, i.e. P = f(t, C). In particular, P = k1 x t x C. k1 is the pollutant deposition coefficient, which represents the degree of pollution of the water pan caused by the deposition and growth of pollutants. The cumulative running time t can be determined by the running time of the air conditioner motor, and the indoor average pollutant concentration C is obtained by real-time or periodic detection by the indoor pollutant sensor and calculation of the corresponding average value.

[0085] When the pollution degree P of the water pan is less than or equal to the preset value P0, it is determined to be no, indicating that the air conditioner has not been running for a long time or the air quality is good, and the water pan is not significantly dirty, so no cleaning is required.

[0086] When the pollution degree P of the water pan is greater than or equal to the preset value P1, it is determined to be yes, indicating that the air conditioner has been running for a long time or the indoor air quality is poor, and the water pan is likely to be dirty, so the relevant program needs to be run as soon as possible to clean it and ensure the user's health.

[0087] When the pollution degree P of the water pan is between P0 and P1, it is generally dirty and can be cleaned in time or delayed, and in particular, when the water pan self-cleaning instruction comes from user settings, the user's wishes are given priority to clean in time; when the water pan self-cleaning instruction comes from the air conditioner's self-detection, the user is reminded by voice, APP push or other means whether to perform water channel self-cleaning. In particular, when the water pan self-cleaning instruction comes from the air conditioner's self-detection and other user cooling instructions are being run at the moment, the user is reminded after the relevant mode is run.

[0088] ​Optionally, the water pan pollution degree can also be determined directly by the accumulated running time or the interval time from the last self-cleaning, or can be visually determined by a camera, etc., to achieve the effect of the present application.

[0089] The cleaning times are recorded as x = 0.

[0090] Step 4, control the air conditioner to perform water pan self-cleaning.

[0091] When it is determined that the water pan self-cleaning is needed, the air conditioner is controlled to run the following self-cleaning program. The water pan self-cleaning program includes condensation, frosting, defrosting and drying processes, which are sequentially performed, specifically:

[0092] Step 41, condensation process: measure the water film thickness and determine whether the condensation time is overtime, and perform the cycle freezing and peeling control air conditioner deflector opening.

[0093] ①Obtain the current temperature and relative humidity of the indoor environment where the indoor unit is located through the environmental temperature and humidity sensor, determine the evaporator surface dewing temperature T 露 .

[0094] ②Reduce the indoor unit fan speed and adjust the compressor working frequency to control the evaporator surface temperature T, so that it is maintained below the indoor dewing temperature, i.e. T≤T 露 , the evaporator surface temperature is obtained by detecting the temperature bag.

[0095] ③Maintain the above evaporator surface condensation process for a certain time t 露 , to produce enough condensate water to cover the entire waterway film surface. Detect the current water film thickness D x , such as detecting the change of water film with infrared, capacitive sensor or camera to identify the change of water film, target water film thickness D0, judge the water film thickness D x > D0, enter the next step, otherwise continue to condense. At the same time, judge t 露 > t0 is true, then enter the next step, preferably, the longest duration of evaporator condensation t0 is 15 min, otherwise continue to condense.

[0096] Step 42, frosting process.

[0097] Step 43, defrosting process.

[0098] Step 44, cycle freezing and peeling process.

[0099] Step 45, drying process.

[0100] In the scheme of the present application, according to the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the waterway coating, at least one of the rotating speed of the indoor fan and the frequency of the compressor is controlled to make the condensate water generated by the fins at the freezing function to spread on the surface of the waterway coating to clean the surface of the waterway coating, which is beneficial to improve the cleaning effect.

[0101] In some embodiments, in step S220, according to the freezing surface temperature of the indoor heat exchanger, at least one of the rotating speed of the indoor fan and the frequency of the compressor is controlled to make the fin surface at the freezing function in the indoor heat exchanger frost, and then make the condensate water gathered on the waterway coating freeze. For specific process, see the following exemplary description.

[0102] The following will be described in combination with Figure 4 An embodiment flowchart of the method of the present application shown in the present application is further described in combination with the specific process of making the fin surface at the freezing function in the indoor heat exchanger frost in step S220, which includes steps S410 to S430.

[0103] In step S410, the corrected temperature of the indoor heat exchanger is determined. Wherein, the corrected temperature of the indoor heat exchanger is, for example, the corrected temperature T 霜修正 .

[0104] In step S420, the indoor fan is turned off or the rotating speed of the indoor fan is reduced, and / or the frequency of the compressor is increased, 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. 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 the frosting target temperature T 霜 +1℃.

[0105] In step S430, the set frosting time is maintained to make the fin surface at the freezing function in the indoor heat exchanger frost, and then make the condensate water gathered on the waterway coating freeze. Wherein, the set frosting time is, for example, the duration t 霜 .

[0106] As Figure 12 shown, the waterway self-cleaning control method of the air conditioner further includes the following steps:

[0107] In the frosting process of step 42: the indoor unit fan is turned off or the rotation speed of the indoor unit fan is adjusted and / or the working frequency of the compressor is adjusted, so that the surface of the main heat exchange area of the indoor unit evaporator is frosted to achieve the freezing effect on the water channel, including: ① reducing the rotation speed of the indoor unit fan or turning off the indoor fan, adjusting the working frequency of the compressor, to control the surface temperature T of the main heat exchange area of the evaporator 6, so that it is still maintained in a certain frosting target temperature range after freezing correction, and 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, the wind speed is increased or the frequency is reduced, T≥T 霜 +1℃-T 霜修正 , 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 , the wind speed and the frequency remain unchanged. Preferably, the frosting target temperature T 霜 is -4℃ to -2℃. The corrected temperature T 霜修正 is related to the efficiency of the heat exchanger fin temperature conduction to the copper foil water channel. ② maintaining the above-mentioned evaporator surface frosting process for a certain time t 霜 , so that the entire water channel film surface can be frozen. Preferably, the duration t 霜 of the evaporator frosting is 15 minutes.

[0108] In the scheme of the present application, 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, so that the fin surface at the freezing function in the indoor heat exchanger is frosted, and then the condensed water gathered on the water channel film is frozen, so that the entire water channel film surface can be frozen, and the dirt on the water channel film surface is frozen to achieve cleaning.

[0109] In some embodiments, in step S230, 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 rotation speed of the indoor fan and the frequency of the compressor is controlled, so that the fin surface at the freezing function in the indoor heat exchanger is defrosted, and the specific process of melting the frost layer frozen on the water channel film is described below.

[0110] The following will be described in combination with Figure 5The flowchart of an embodiment of the method of the present invention for melting the frost layer frozen on the water channel coating is shown, further illustrating the specific process of melting the frost layer frozen on the water channel coating in step S230, including: steps S510 to S520.

[0111] 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℃.

[0112] Step S520 , maintaining the set defrost time to defrost the fin surface at the freezing function in the indoor heat exchanger, thereby melting the frost layer frozen on the water channel coating.

[0113] like Figure 12 As shown, the water channel self-cleaning control method of the air conditioner further includes the following steps:

[0114] During the defrosting process of step 43: the air conditioner is converted from cooling mode to heating mode through the process of stopping the compressor, reversing the four-way valve and restarting the compressor. The speed of the fan in the air conditioner and / or the operating frequency of the compressor are adjusted to increase the temperature of the evaporator fins to reach the frost melting condition at the bottom of the water channel, and enter the defrosting and drying process. The speed of the indoor unit fan is adjusted, and the operating frequency of the compressor is controlled to return the water channel temperature to above 0°C (melting). For example: the fan is not turned on directly, because the thermal conductivity of the copper foil itself is relatively good, there is no need to bring heat to the water channel through the fan, and the water channel temperature will return faster under this condition. The compressor can be run at a high frequency. The higher the heat exchange capacity, the faster the speed, which does not have much impact.

[0115] In the solution of the present invention, 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 rotation speed of the indoor fan and the frequency of the compressor is controlled to defrost the fin surface at the freezing function in the indoor heat exchanger, melt the frost layer frozen on the water channel coating, and allow the dirt on the surface of the water channel coating to be discharged along with the defrosted water.

[0116] In some embodiments, in step S240 , the specific process of cyclically executing the preset frosting process and the preset defrosting process according to the degree of contamination of the water receiving tray is described in the following exemplary embodiment.

[0117] The following combination Figure 6The flowchart of an embodiment of cyclically executing the preset frosting process and the preset defrosting process in the method of the present invention further illustrates the specific process of cyclically executing the preset frosting process and the preset defrosting process in step S240, including: steps S610 to S640.

[0118] Step S610: After executing the preset frosting process and the preset defrosting process, the number of cleaning times of the water receiving tray is cumulatively added by 1 to obtain the cumulative number of cleaning times of the water receiving tray.

[0119] Step S620: Determine whether the water tray is clean based on the degree of contamination of the water tray; and determine whether the cumulative number of cleanings of the water tray is greater than a preset number. The cumulative number of cleanings of the water tray is x, and the preset number is 3. The cumulative number of cleanings of the water tray is calculated by adding 1 to the cumulative number of cleanings of the water tray.

[0120] In step S630, if it is determined that the water receiving tray is not clean, and it is determined that the cumulative cleaning times of the water receiving tray is less than or equal to the preset times, the process returns to continue to perform the preset frosting process and the preset defrosting process.

[0121] In step S640, if it is determined that the water receiving tray has been cleaned, or if it is determined that the cumulative number of cleaning times of the water receiving tray is greater than the preset number, the preset frosting process and the preset defrosting process are terminated to execute the preset drying process.

[0122] like Figure 12 As shown, the water channel self-cleaning control method of the air conditioner further includes the following steps:

[0123] In the freeze-stripping process of step 44, it is determined whether the product is clean. If it is clean, the process proceeds to the next step. Otherwise, the process returns to the condensation process and the number of cleaning times is recorded as x = x + 1. When x>3, the process directly proceeds to the drying process.

[0124] The degree of contamination P of the water collection pan 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). Specifically, P = k1 × t × C. k1 is the pollutant deposition coefficient, which characterizes the degree of contamination of the water collection pan due to the deposition and growth of pollutants. Based on the above judgment and confirmation, the solution of the present invention uses a sensor to determine the concentration of pollutants in the water to determine whether it is clean. As the number of cleanings increases, the pollution concentration of the water will decrease, and it can be controlled to be clean.

[0125] In the solution of the present invention, according to the degree of contamination of the water receiving tray, a preset frosting process and a preset defrosting process are cyclically executed to enhance the cleaning effect of dirt on the surface of the water channel coating.

[0126] In some embodiments, the defrosting water on the waterway coating is dried in step S250, and then the preset self-cleaning program is exited, and the specific process of self-cleaning of the water pan is completed, see the following exemplary description.

[0127] The specific process of drying the defrosting water on the waterway coating in step S250 will be further described below with reference to the flowchart of an embodiment of the method of the air conditioner shown in Figure 7 FIG. 7, which further illustrates the specific process of drying the defrosting water on the waterway coating in step S250, including steps S710 to S720.

[0128] In step S710, the rotation speed of the indoor fan is reduced, and / or the frequency of the compressor is increased, so that the frozen surface temperature of the indoor heat exchanger is within the error range of the set defrosting target temperature of the indoor heat exchanger.

[0129] In step S720, the set defrosting time is maintained, so that the fin surface at the frozen function in the indoor heat exchanger is defrosted, and the defrosting water frozen on the waterway coating is dried.

[0130] As shown in Figure 12 , the waterway self-cleaning control method of the air conditioner further includes the following steps:

[0131] In the drying process of step 45: through the process of compressor shutdown, four-way valve reversing, and compressor restart, the air conditioner is converted from the refrigeration mode to the heating mode. The rotation speed of the indoor fan and / or the working frequency of the compressor are adjusted to increase the evaporator fin temperature to the waterway bottom frost melting condition, and enter the defrosting and drying process, including: ① adjusting the rotation speed of the indoor fan and controlling the working frequency of the compressor to maintain the evaporator surface temperature T within a certain defrosting target temperature range, the defrosting target temperature range is T 化 ± 2℃, that is, T 化 + 2℃ ≥ T ≥ T 化 - 2℃. Specifically, when T 化 - 2℃ ≥ T, the wind speed is reduced or the frequency is increased, T ≥ T 化 + 2℃, the wind speed is increased or the frequency is reduced, T 化 + 2℃ ≥ T ≥ T 化 - 2℃, the wind speed and frequency remain unchanged. Preferably, the defrosting target temperature T 化 is 56℃-65℃; ② maintaining the above evaporator surface defrosting and drying process for a certain time t 化 , so that the frost layer between the fins and in the water pan is effectively melted and sufficiently dried. Preferably, the duration t 化 of the evaporator defrosting and drying is 30min-40min.

[0132] Step 5, when it is judged that the water pan self-cleaning is not needed, the air conditioner is controlled to perform the water pan drying function, and then the self-cleaning mode is exited to make the air conditioner normally operate. If there is stored water in the water channel, drying can prevent the reproduction of microorganisms.

[0133] In the scheme of the present application, the defrosting water on the water channel film is dried, and then the preset self-cleaning program is exited to complete the self-cleaning of the water pan, so as to avoid the accumulation of dirt on the water channel film surface by the defrosting water not discharged, and improve the cleaning effect.

[0134] In the scheme of the present application, the air conditioner can realize the processes of condensation, frosting, defrosting drying of the water pan by the cooperation control of the compressor, fan and other actuators in the related scheme through the water channel film, combined with the system parameter control, to achieve the effects of condensate cleaning, freezing stripping, high-temperature sterilization, etc., that is, the air conditioner itself realizes the self-cleaning of the water pan, and is efficient, durable and no consumables, so as to solve the problem of difficult cleaning of the dirty water pan in the related scheme.

[0135] The technical scheme of the present embodiment is adopted, a film is coated on the water channel of the indoor unit of the air conditioner (such as a copper foil adhered or injection molded on the water channel, a water channel film formed by setting a copper foil on the water channel and then coating a corrosion-resistant layer, etc.); in the case that the air conditioner is started and operates in the cooling mode, it is judged whether the self-cleaning program of the air conditioner needs to be started; in the case that the self-cleaning program of the air conditioner needs to be started, in the condensation process: the freezing function is started, and at least one of the rotation speed of the indoor fan and the frequency of the compressor is adjusted to make the freezing function produce condensate water and gather into the water pan according to the water film thickness on the water channel film; in the frosting process: at least one of the rotation speed of the indoor fan and the frequency of the compressor is adjusted to freeze the surface of the water channel film of the water pan; in the defrosting and drying process: the cooling mode is switched to the heating mode, and at least one of the rotation speed of the indoor fan and the frequency of the compressor is adjusted to make the temperature of the surface of the water channel film restore to above 0℃, so as to defrost and dry the water channel; then the self-cleaning program is exited: the freezing function is closed, and the heat exchange function is started; thereby, the water channel film is used to produce condensate water into the water pan by the freezing function of the evaporator, and the self-cleaning is realized by frosting and defrosting and drying, so as to avoid the dirtiness of the water channel and the peculiar smell, which is beneficial to human health.

[0136] According to the embodiments of the present application, an air conditioner control device corresponding to the control method of the air conditioner is also provided. Referring to Figure 8The structural schematic diagram of an embodiment of the device of the application is shown. 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 pan; a film is arranged on the water channel surface of the water pan to form a water channel film; the refrigerant flow path of the indoor heat exchanger has a freezing function, and the condensed water generated by the freezing function can be collected on the surface of the water channel film and undergo freezing, defrosting and drying, wherein the water pan is like the water pan 1 in Figure 10 , the water channel film is like the aluminum foil water channel 9 in Figure 11 , and in the scheme of the application, the control device of the air conditioner is shown in Figure 8 , which includes an acquisition unit 102 and a control unit 104.

[0137] The acquisition unit 102 is configured to acquire the degree of contamination of the water pan, the indoor environment temperature of the air conditioner, and the indoor environment relative humidity of the air conditioner after the air conditioner is powered on and the self-cleaning function for self-cleaning of the water pan is turned on; acquire the freezing surface temperature of the indoor heat exchanger; and in the case of forming a water film on the water channel film, acquire the thickness of the water film formed on the water channel film, denoted as the water film thickness of the water channel film. For specific functions and processing of the acquisition unit 102, see step S110.

[0138] The control unit 104 is configured to determine whether the water pan needs to be self-cleaned according to the degree of contamination of the water pan. For specific functions and processing of the control unit 104, see step S120.

[0139] The control unit 104 is further configured to execute 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 environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel film, so that the condensed water generated by the freezing function in the indoor heat exchanger can be collected on the surface of the water channel film and undergo freezing, defrosting and drying, thereby achieving self-cleaning of the water pan. For specific functions and processing of the control unit 104, see also step S130.

[0140] The scheme of the present application provides a water channel self-cleaning control method of an air conditioner, which adopts a high-efficiency and durable air conditioner water channel purification scheme based on the natural process of water freezing expansion (thermal expansion and cold contraction) leading to structural damage, realizes the self-cleaning effect of the water channel through the freezing peeling, condensation flushing and high-temperature sterilization of the water channel coating film (such as covering copper foil on the surface of the water channel coating film) combined with the control program of the air conditioner itself, and better solves the dirt problem of the water channel of the air conditioner, which is beneficial to human health.

[0141] In some embodiments, the water channel coating film can be in direct contact with the air inlet face of the indoor heat exchanger and / or the bottom end of the indoor heat exchanger.

[0142] As shown in Figure 10 The air conditioner includes an indoor unit and an outdoor unit. The indoor unit has an air inlet 4, an indoor fan 8, an air outlet 5, and a water collecting tray 1 and an environmental parameter detection device (such as a temperature and humidity sensor) in the air duct communicating with the air inlet 4 and the air outlet 5. The outdoor unit has a compressor, an outdoor fan, a condenser and other components. The environmental parameter detection device is an air quality detection unit and an air temperature and humidity detection unit. The air quality detection unit is used to detect the indoor environmental air quality, including a PM2.5 sensor, a microorganism sensor, etc. The air temperature and humidity detection unit is used to detect the indoor environmental temperature and humidity, including a temperature sensor, a humidity sensor or a temperature and humidity sensor, etc. The water collecting tray 1 is provided with an evaporator 6 having a copper pipe 3 and fins 2. The evaporator 6 will produce condensed water during the refrigeration operation of the air conditioner, which flows down along the fins 2 of the evaporator 6, converges into the water collecting tray 1, flows from the high position of the water collecting tray to the low position of the water collecting tray, and finally is discharged to the outdoor through the drain pipe of the air conditioner. Optionally, the drain has a controllable valve, and the presence or absence of condensed water in the water collecting tray 1 can be controlled by opening or closing the valve.

[0143] The environmental parameter detection device is an air quality detection unit and an air temperature and humidity detection unit. The air quality detection unit is used to detect the indoor environmental air quality, including a PM2.5 sensor, a microorganism sensor, etc. The air temperature and humidity detection unit is used to detect the indoor environmental temperature and humidity, including a temperature sensor, a humidity sensor or a temperature and humidity sensor, etc. The water channel liquid film thickness and icing detection unit is used to determine whether the water thickness in the water channel meets the freezing requirement and whether the accumulated water is iced. The water collecting tray 1 is provided with a heat exchanger (such as an evaporator 6). The heat exchanger will produce condensed water during the refrigeration operation of the air conditioner, which flows down along the fins 2 of the heat exchanger, converges into the water collecting tray 1, and finally is discharged to the outdoor through the drain pipe of the air conditioner. The water channel coating film scheme adopts copper foil, and the copper foil body has excellent antibacterial and thermal conductivity performance, which can meet the requirements of the freezing peeling technology.

[0144] As shown in Figure 11As shown, after the copper foil film is adhered to the water channel, the copper foil water channel 9 is formed, and the copper foil water channel 9 can also conduct cold. The copper foil film on the water channel is in direct contact with the evaporator air inlet face 61, and the copper foil film on the water channel is also in direct contact with the evaporator bottom end 62. Thus, the condensed water can be conveniently collected to achieve self-cleaning.

[0145] In some embodiments, a film is arranged on the water channel surface of the water pan to form a water channel film, including: arranging a predetermined copper foil on the water channel surface of the water pan by using bonding or insert injection molding to form the water channel film; or arranging a predetermined copper foil on the water channel surface of the water pan by using bonding or injection molding, and then coating a predetermined corrosion-resistant coating layer to form the water channel film.

[0146] Specifically, the copper foil film technology uses a copper foil material with moderate thickness (usually 0.1 mm to 0.5 mm) and excellent heat conduction performance. The width and length of the copper foil are customized according to the specific size of the water channel. Adhesive: a high-temperature-resistant and corrosion-resistant adhesive (which requires a certain period of time or certain conditions for bonding, and is in a liquid state before bonding) is selected to ensure that the copper foil does not fall off in the high-temperature and high-humidity environment of the air conditioner. After the copper foil is cleaned and dried, the adhesive is applied to the back, the copper foil is adhered to the water channel, and the water channel and the copper foil are completely matched by using mold pressing. The adhesive completes the bonding under certain conditions, and the water channel film process is completed.

[0147] The scheme of the present application provides a water channel based on a material film and an air conditioner with the same. The adhesive requiring solidification operation is used as the bonding material, the water channel and the film material are completely matched, and then solidification is performed to achieve better bonding effect.

[0148] In some alternative embodiments, a corrosion-resistant coating layer can be coated on the surface of the copper foil to improve the long-term reliability of the film scheme. In addition to the above method, insert injection molding and other methods can be used to tightly fix the copper foil to the water channel of the bottom shell of the heat exchanger. The upper and lower water channels of the bottom shell of the heat exchanger can both use the film scheme to achieve long-acting self-cleaning of the condensate water and freeze-thaw purification scheme of the air conditioner water pan, and ensure the cleaning effect.

[0149] In some embodiments, the control unit 104 executes a preset self-cleaning program to: in combination with the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the frozen surface temperature of the indoor heat exchanger, and the water film thickness of the water channel film, control the freezing function, 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 freezing function in the indoor heat exchanger can be collected to the surface of the water channel film and frozen, defrosted, and dried to achieve self-cleaning of the water pan, including:

[0150] The control unit 104 is further configured to execute a preset condensation process in a preset self-cleaning program: according to the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the frozen surface temperature of the indoor heat exchanger, and the water film thickness of the waterway film, control at least one of the rotation speed of the indoor fan and the frequency of the compressor to make the condensate water generated by the fins at the freezing function; and control the freezing function to make the condensate water generated by the fins at the freezing function in the indoor heat exchanger converge on the waterway film. The specific functions and processes of the control unit 104 are also described in step S210.

[0151] The control unit 104 is further configured to execute a preset frost process: according to the frozen surface temperature of the indoor heat exchanger, control at least one of the rotation speed of the indoor fan and the frequency of the compressor to make the fins at the freezing function in the indoor heat exchanger frost, and then make the condensate water converged on the waterway film freeze. The specific functions and processes of the control unit 104 are also described in step S320.

[0152] The control unit 104 is further configured to execute a preset defrosting process: control the air conditioner to turn off the cooling mode and turn on the heating mode, according to the frozen surface temperature of the indoor heat exchanger, control at least one of the rotation speed of the indoor fan and the frequency of the compressor to make the fins at the freezing function in the indoor heat exchanger defrost, and make the frost layer frozen on the waterway film melt. The specific functions and processes of the control unit 104 are also described in step S230.

[0153] The control unit 104 is further configured to execute a preset cycle freezing and stripping process: according to the pollution degree of the water pan, cyclically execute the preset frost process and the preset defrosting process. The specific functions and processes of the control unit 104 are also described in step S240.

[0154] The control unit 104 is further configured to execute a preset drying process: dry the defrosting water on the waterway film, and then exit the preset self-cleaning program to complete the self-cleaning of the water pan. The specific functions and processes of the control unit 104 are also described in step S250.

[0155] In the scheme of the present application, the freezing function is controlled in combination with the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, and at least one of the rotating speed of the indoor fan and the frequency of the compressor is controlled, so that the condensed water generated by the freezing function in the indoor heat exchanger can be collected on the surface of the water channel coating and frozen, defrosted and dried, realizing self-cleaning of the water pan, better solving the dirt problem of the water channel of the air conditioner, and being beneficial to human health.

[0156] In some embodiments, the control unit 104 controls at least one of the rotating speed of the indoor fan and the frequency of the compressor according to the indoor environment temperature of the air conditioner, the indoor environment relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, so that the condensed water generated by the fins at the freezing function includes:

[0157] The control unit 104 is specifically further configured to determine the surface dewing temperature of the indoor heat exchanger according to the indoor environment temperature of the air conditioner and the indoor environment relative humidity of the air conditioner. The specific functions and processes of the control unit 104 are also referred to step S310.

[0158] The control unit 104 is specifically further configured to reduce the rotating 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 dewing temperature of the indoor heat exchanger; and record the continuous dewing time of the preset dewing process. The specific functions and processes of the control unit 104 are also referred to step S320.

[0159] The control unit 104 is specifically further configured to determine whether the water film thickness of the water channel coating is greater than the preset target water film thickness, and the continuous dewing time of the preset dewing process is greater than the preset longest dewing time; wherein the continuous dewing time of the preset dewing process is, for example, a certain time t of the evaporator surface dewing process 露 , and the preset longest dewing time is, for example, the longest duration t0 of the evaporator dewing. The specific functions and processes of the control unit 104 are also referred to step S330.

[0160] The control unit 104 is specifically further configured to end the preset dewing process if it is determined that the condition is met. The specific functions and processes of the control unit 104 are also referred to step S340.

[0161] The control unit 104 is further configured to return to continue the preset condensation process if it is determined that the condition is not met, so that the condensed water generated by the fins at the freezing function can cover the surface of the water channel film. The specific functions and processes of the control unit 104 are also described in step S350.

[0162] Figure 12 The flowchart of the water channel self-cleaning control method of the air conditioner. In order to achieve the above purpose, as shown in Figure 12 The scheme of the present application provides a water pan self-cleaning control scheme for an air conditioner in combination with the above heat exchanger. As shown in Figure 12 The water channel self-cleaning control method of the air conditioner includes the following steps:

[0163] Step 1, the air conditioner is powered on and operated, and then step 2 or step 3 is executed.

[0164] Step 2, get the user's water pan self-cleaning instruction, and then execute step 3.

[0165] Step 3, detect the pollution degree of the water pan of the air conditioner and determine whether the self-cleaning program needs to be run: if yes, execute step 4, otherwise execute step 5.

[0166] In step 3, the pollution degree P of the water pan is determined by combining the cumulative running time t of the air conditioner and the average indoor pollutant concentration C in the corresponding time period, i.e. P = f(t, C). In particular, P = k1 x t x C. k1 is the pollutant deposition coefficient, which represents the degree of pollution of the water pan caused by the deposition and growth of pollutants. The cumulative running time t can be determined by the running 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.

[0167] When the pollution degree P of the water pan is less than or equal to the preset value P0, it is determined to be no, indicating that the air conditioner has not been running for a long time or the air quality is good, and the water pan has no obvious dirt, so no cleaning is needed.

[0168] When the pollution degree P of the water pan is greater than or equal to the preset value P1, it is determined to be yes, indicating that the air conditioner has been running for a long time or the indoor air quality is poor, and the water pan is likely to be dirty, so the relevant program needs to be run as soon as possible to clean it and ensure the user's health.

[0169] When the water tray is contaminated to a degree P0 <P<P1时,说明接水盘脏污情况一般,可以及时进行清洁或延后处理,具体的,当接水盘自清洁指令来源于用户设定时,以用户意愿为主,及时清洁为优先级;当接水盘自清洁指令来源于空调器自主检测时,通过语音、APP推送等方式提醒由用户抉择是否进行水道自清洁。特别的,当接水盘自清洁指令来源于空调器自主检测且此时正在运行其它用户制冷等常规指令时,待相关模式运行结束再进行提醒。

[0170] Optionally, the degree of contamination of the water receiving tray can also be directly determined by the accumulated running 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 present invention.

[0171] The number of cleanings is recorded as x=0.

[0172] Step 4: Control the air conditioner to perform self-cleaning of the water tray.

[0173] When it is determined that the water tray needs to be self-cleaned, the air conditioner is controlled to run the following self-cleaning program. The water tray self-cleaning program includes condensation, frosting, defrosting and drying processes, and the processes are carried out in sequence. Specifically:

[0174] Step 41, condensation process: measure the water film thickness and determine whether the condensation time has exceeded, and perform cyclic freezing and stripping to control the air guide plate of the air conditioner to open.

[0175] 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 .

[0176] 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.

[0177] ③ Maintain the condensation process on the evaporator surface for a certain time t 露 , to generate enough condensed water to contact and cover the entire surface of the water channel membrane. Detect the current water film thickness D x , target water film thickness D0, judge the water film thickness D x >D0 to enter the next step, otherwise continue condensation. At the same time, judge t 露 >t0 is true, then proceed to the next step. Preferably, the maximum duration t0 of condensation in the evaporator is 15 minutes, otherwise condensation continues.

[0178] Step 42: Frosting process.

[0179] Step 43: Defrosting process.

[0180] Step 44: Circulate the freezing and stripping process.

[0181] Step 45: Drying process.

[0182] In the solution of the present invention, at least one of the rotation 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, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, so that the condensed water generated by the fins at the freezing function makes the surface of the water channel coating covered with condensed water and cleans the surface of the water channel coating, which is conducive to improving the cleaning effect.

[0183] 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, 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 on the water channel film, including:

[0184] 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.

[0185] 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 .

[0186] The control unit 104 is further configured to maintain a set frosting time so that the fin surface of the freezing function in the indoor heat exchanger is frosted, thereby freezing the condensed water gathered on the water channel film; wherein the set frosting time is such as the duration of frost on the evaporator t 霜 The specific functions and processing of the control unit 104 are also described in step S430.

[0187] like Figure 12 As shown, the water channel self-cleaning control method of the air conditioner further includes the following steps:

[0188] In the frosting process of step 42: the indoor unit fan is turned off or the rotation speed of the indoor unit fan is adjusted and / or the working frequency of the compressor is adjusted, so that the surface of the main heat exchange area of the indoor unit evaporator is frosted to achieve the freezing effect on the water channel, including: ① reducing the rotation speed of the indoor unit fan or turning off the indoor fan, adjusting the working frequency of the compressor, to control the surface temperature T of the main heat exchange area of the evaporator 6, so that it still maintains a certain frosting target temperature range after freezing correction, and 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, the wind speed is increased or the frequency is reduced, T≥T 霜 +1℃-T 霜修正 , 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 , the wind speed and the frequency remain unchanged. Preferably, the frosting target temperature T 霜 is -4℃ to -2℃. The corrected temperature T 霜修正 is related to the efficiency of the heat exchanger fin temperature conduction to the copper foil water channel. ② maintaining the above-mentioned evaporator surface frosting process for a certain time t 霜 , so that the entire water channel film surface can be frozen. Preferably, the duration t 霜 of the evaporator frosting is 15 minutes.

[0189] In the scheme of the present application, 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, so that the fin surface at the freezing function in the indoor heat exchanger is frosted, and then the condensed water gathered on the water channel film is frozen, so that the entire water channel film surface can be frozen, and the dirt on the water channel film surface is frozen to achieve cleaning.

[0190] In some embodiments, the control unit 104 controls 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, at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled, so that the fin surface at the freezing function in the indoor heat exchanger is defrosted, and the frost layer frozen on the water channel film is melted, including:

[0191] The control unit 104 is further configured to reduce the rotation speed of the indoor fan and / or increase 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; 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 the defrost target temperature T 化 +2℃. The specific functions and processes of the control unit 104 are also described in step S510.

[0192] The control unit 104 is further configured to maintain the set defrost time to defrost the fin surface at the frozen function in the indoor heat exchanger, thereby melting the frost layer frozen to the waterway film. The specific functions and processes of the control unit 104 are also described in step S520.

[0193] As shown in Figure 12 The waterway self-cleaning control method of the air conditioner further includes the following steps:

[0194] During the defrosting process in step 43: through the process of compressor shutdown, four-way valve reversing, and compressor restart, the air conditioner is converted from cooling mode to heating mode. The rotation speed of the indoor fan and / or the working frequency of the compressor are adjusted to increase the evaporator fin temperature to meet the waterway bottom frost melting condition, enter the defrosting and drying process, adjust the rotation speed of the indoor fan, control the working frequency of the compressor, and make the waterway temperature return to above 0℃ (melting is available).

[0195] The direct fan is not turned on because the copper foil itself has good thermal conductivity and does not need to bring heat to the waterway through the fan, and the waterway temperature return speed will be faster under this condition. The compressor runs at high frequency, the higher the heat exchange capacity, the faster the speed, which does not affect too much.

[0196] In the scheme of the present application, the control unit 104 controls the air conditioner to close the cooling mode and open the heating mode, and controls at least one of the rotation speed of the indoor fan and the frequency of the compressor according to the frozen surface temperature of the indoor heat exchanger, so that the fin surface at the frozen function in the indoor heat exchanger is defrosted, the frost layer frozen to the waterway film is melted, and the dirt on the surface of the waterway film can be discharged with the defrosting water.

[0197] In some embodiments, the control unit 104 cyclically performs a preset frosting process and a preset defrosting process according to the degree of contamination of the water pan, including:

[0198] The control unit 104 is further configured to, after executing the preset frosting process and the preset defrosting process, add 1 to the cumulative cleaning times of the water receiving tray to obtain the cumulative cleaning times of the water receiving tray. Specific functions and processing of the control unit 104 are also described in step S610.

[0199] The control unit 104 is further configured to determine whether the water receiving tray is clean based on the degree of contamination of the water receiving tray; and to determine whether the cumulative cleaning count of the receiving tray is greater than a preset number; wherein the cumulative cleaning count of the receiving tray is x, and the preset number is 3. The cumulative cleaning count of the water receiving tray is calculated by adding 1 to the cumulative cleaning count of the water receiving tray. The specific functions and processing of the control unit 104 are further described in step S620.

[0200] The control unit 104 is further configured to return to continue executing the preset frosting process and the preset defrosting process if it is determined that the water receiving tray is not clean and the cumulative number of cleaning times of the water receiving tray is less than or equal to the preset number of cleaning times. The specific functions and processing of the control unit 104 are also shown in step S630.

[0201] The control unit 104 is further configured to terminate the preset frosting process and the preset defrosting process and then execute the preset drying process if it is determined that the water receiving tray is clean or that the cumulative number of cleanings of the water receiving tray exceeds a preset number. The specific functions and processing of the control unit 104 are further described in step S640.

[0202] like Figure 12 As shown, the water channel self-cleaning control method of the air conditioner further includes the following steps:

[0203] In the freeze-stripping process of step 44, it is determined whether the product is clean. If it is clean, the process proceeds to the next step. Otherwise, the process returns to the condensation process and the number of cleaning times is recorded as x = x + 1. When x>3, the process directly proceeds to the drying process.

[0204] The degree of contamination P of the water collection pan 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). Specifically, P = k1 × t × C. k1 is the pollutant deposition coefficient, which characterizes the degree of contamination of the water collection pan due to the deposition and growth of pollutants. Based on the above judgment and confirmation, the solution of the present invention uses a sensor to determine the concentration of pollutants in the water to determine whether it is clean. As the number of cleanings increases, the pollution concentration of the water will decrease, and it can be controlled to be clean.

[0205] In the solution of the present invention, according to the degree of contamination of the water receiving tray, a preset frosting process and a preset defrosting process are cyclically executed to enhance the cleaning effect of dirt on the surface of the water channel coating.

[0206] In some embodiments, the control unit 104, after drying the defrosting water on the waterway film, exits the preset self-cleaning program to complete the self-cleaning of the water pan, comprising:

[0207] The control unit 104 is specifically further configured to reduce the rotation speed of the indoor fan and / or increase the frequency of the compressor, so that the frozen surface temperature of the indoor heat exchanger is within the error range of the set defrosting target temperature of the indoor heat exchanger. The specific functions and processes of the control unit 104 are also referred to step S710.

[0208] The control unit 104 is specifically further configured to maintain the set defrosting time to defrost the fin surface at the frozen function in the indoor heat exchanger, and then to dry the defrosting water frozen on the waterway film. The specific functions and processes of the control unit 104 are also referred to step S720.

[0209] As shown in Figure 12 The waterway self-cleaning control method of the air conditioner further comprises the following steps:

[0210] During the drying process of step 45: through the process of compressor shutdown, four-way valve reversing and compressor restart, the air conditioner is converted from refrigeration mode to heating mode. The rotation speed of the indoor fan and / or the working frequency of the compressor are adjusted to increase the evaporator fin temperature to reach the frost melting condition at the bottom of the waterway, and enter the defrosting and drying process, comprising: ① adjusting the rotation speed of the indoor fan and controlling the working frequency of the compressor to maintain the evaporator surface temperature T within a certain defrosting target temperature range, the defrosting target temperature range is T 化 ±2℃, that is, T 化 +2℃≥T≥T 化 -2℃. Specifically, when T 化 -2℃, the wind speed is reduced or the frequency is increased, T 化 +2℃, the wind speed is increased or the frequency is reduced, T 化 +2℃≥T≥T 化 -2℃, the wind speed and frequency remain unchanged. Preferably, the defrosting target temperature T 化 is 56℃-65℃; ② maintaining the above evaporator surface defrosting and drying process for a certain time t 化 , so that the frost layer between the fins and in the water pan is effectively melted and sufficiently dried. Preferably, the duration t 化 of the evaporator defrosting and drying is 30min-40min.

[0211] Step 5, when it is judged that the water pan self-cleaning is not needed, the air conditioner is controlled to perform the water pan drying function, and then the self-cleaning mode is exited to make the air conditioner run normally.

[0212] In the scheme of the present application, the defrosting water on the water channel film is dried, and then the preset self-cleaning program is exited, and the self-cleaning of the water pan is completed, so that the water channel film surface is prevented from being accumulated with dirt again by the defrosting water not discharged, and the cleaning effect is improved.

[0213] In the scheme of the present application, the air conditioner can realize the processes of condensation cleaning, freezing stripping, defrosting drying and the like of the water pan by the cooperation control of the compressor, the fan and the like actuators of the water channel film and the system parameter control without increasing additional purification devices, that is, the water pan is completely self-cleaned by the air conditioner itself, and the effect of high efficiency, long duration and no consumables is achieved, so as to solve the problem of difficult cleaning of the water pan dirt in the related scheme.

[0214] Since the processing and functions realized by the device of the present embodiment are basically corresponding to the embodiments, principles and examples of the foregoing method, details not described in the description of the present embodiment can be referred to the related description in the foregoing embodiments, which will not be repeated here.

[0215] According to the embodiments of the present application, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner can include the control device of the air conditioner described above.

[0216] Figure 13 The structure diagram of the water channel self-cleaning control device of the air conditioner. In order to achieve the above-mentioned purpose, as shown in Figure 13 The scheme of the present application further provides an air conditioner control device for completing the above-mentioned 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 air conditioner control method described above is realized.

[0217] In order to achieve the above-mentioned purpose, the scheme of the present application further provides an air conditioner. The air conditioner includes the above-mentioned water channel self-cleaning control device, which can complete the above-mentioned control method to achieve the effects of the scheme of the present application.

[0218] In order to achieve the above-mentioned purpose, the present application further provides an air conditioner. The air conditioner includes the above-mentioned heat exchanger with special-shaped fins and variable flow path and the control device, which can complete the above-mentioned control method to achieve the effects of the scheme of the present application.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] 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.

[0226] 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, and the indoor unit comprising an indoor heat exchanger, an indoor fan, and a water receiving pan; a film is provided on a water channel surface of the water receiving pan to form a water channel film; the refrigerant flow path of the indoor heat exchanger has a freezing function, and condensed water generated by the freezing function can be collected on the surface of the water channel film and frozen, defrosted, and dried; a 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, obtaining an indoor ambient relative humidity of the air conditioner; obtaining a freezing surface temperature of the indoor heat exchanger; and obtaining a thickness of a water film formed on the water channel coating, recorded as the water film thickness of the water channel coating; 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, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, 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 freezing function in the indoor heat exchanger can be gathered on the surface of the water channel coating and frozen, 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 water channel coating can be in direct contact with the air inlet surface of the indoor heat exchanger and / or the bottom end of the indoor heat exchanger.

3. The air conditioner control method according to claim 1 or 2, characterized in that: A coating is provided on the surface of the water channel of the water receiving tray to form a water channel coating, comprising: On the surface of the water channel of the water receiving tray, a preset copper foil is provided by bonding or insert injection molding to form the water channel coating; Alternatively, a preset copper foil is provided on the surface of the water channel of the water receiving tray by bonding or injection molding, and then a preset anti-corrosion coating is applied to form the water channel coating.

4. The air conditioner control method according to any one of claims 1 to 3, 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, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, so that condensed water generated by the freezing function in the indoor heat exchanger can be collected on the surface of the water channel coating and frozen, defrosted, and dried, thereby achieving self-cleaning of the water receiving pan, including: A preset condensation process is performed under a preset self-cleaning program: based on the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled so that condensed water generated by the fins at the freezing function is collected on the water channel coating; and the freezing function is controlled so that the condensed water generated by the fins at the freezing function in the indoor heat exchanger is collected on the water channel coating. 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 gathered on the water channel film; Executing a preset defrosting process: controlling the air conditioner to turn off the cooling mode and turn on the heating mode, and controlling at least one of the rotation 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 and melt the frost layer frozen on the water channel coating; Executing a preset cyclic freezing and stripping process: cyclically executing a preset frosting process and a preset defrosting process according to the degree of contamination of the water receiving tray; Execute the preset drying process: dry the defrost water on the water channel coating, then exit the preset self-cleaning program to complete the self-cleaning of the water receiving tray.

5. The air conditioner control method according to claim 4, characterized in that: According to the indoor ambient temperature of the air conditioner, the indoor ambient relative humidity of the air conditioner, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, at least one of the rotation speed of the indoor fan and the frequency of the compressor is controlled to freeze the condensed water generated by the fins at the freezing function, including: 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; and recording the preset condensation duration of the condensation process; Determining whether the water film thickness of the water channel coating is greater than a preset target water film thickness, and whether the preset continuous condensation time of the condensation process is greater than a preset maximum condensation time; If it is determined that the conditions are met, the preset condensation process is terminated; If it is determined that the condition is not satisfied, the process returns to continue executing the preset condensation process so that the condensed water generated by the fins at the freezing function can cover the surface of the water channel coating.

6. The air conditioner control method according to claim 4 or 5, characterized in that: in, 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 in the indoor heat exchanger, thereby freezing the condensed water collected on the water channel film, 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; Maintaining a set frosting time to allow frost to form on the fin surface of the freezing function in the indoor heat exchanger, thereby freezing the condensed water collected on the water channel film; and / or, 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 and melt the frost layer frozen on the water channel coating, 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 at the freezing function in the indoor heat exchanger, thereby melting the frost layer frozen on the water channel coating.

7. The air conditioner control method according to any one of claims 4 to 6, characterized in that: in, According to the degree of contamination of the water receiving tray, a preset frosting process and a preset defrosting process are cyclically executed, including: After executing the preset frosting process and the preset defrosting process, adding 1 to the number of cleaning times of the water receiving tray to obtain the cumulative number of cleaning times of the water receiving tray; Determine whether the water receiving tray is clean according to the degree of contamination of the water receiving tray; and determine whether the cumulative number of cleaning times of the water receiving tray is greater than a preset number; If it is determined that the water receiving pan is not clean, and it is determined that the cumulative cleaning times of the water receiving pan is less than or equal to the preset times, then return to continue to perform the preset frosting process and the preset defrosting process; If it is determined that the water receiving tray has been cleaned, or if it is determined that the cumulative number of cleaning times of the water receiving tray is greater than a preset number, then the preset frosting process and the preset defrosting process are terminated to execute the preset drying process; and / or, The defrost water on the water channel film is dried, and then the preset self-cleaning program is exited to complete the self-cleaning of the water receiving tray, 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 at the freezing function in the indoor heat exchanger, thereby allowing the defrost water frozen on the water channel coating to be dried.

8. 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, and the indoor unit comprising an indoor heat exchanger, an indoor fan, and a water receiving pan; a film is provided on the surface of the water channel of the water receiving pan to form a water channel film; the refrigerant flow path of the indoor heat exchanger has a freezing function, and condensed water generated by the freezing function can be collected on the surface of the water channel film and frozen, defrosted, and dried; the control device of the air conditioner comprises: an acquisition 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, acquire an indoor ambient relative humidity of the air conditioner; acquire a freezing surface temperature of the indoor heat exchanger; and acquire a thickness of a water film formed on the water channel coating, denoted as the water film thickness of the water channel coating; 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, the freezing surface temperature of the indoor heat exchanger, and the water film thickness of the water channel coating, 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 freezing function in the indoor heat exchanger can be gathered on the surface of the water channel coating and frozen, defrosted and dried, thereby achieving self-cleaning of the water receiving pan.

9. An air conditioner, characterized in that: include: The control device for an air conditioner as claimed in claim 8.

10. 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 7.

11. 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 7 are implemented.

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