Self-cleaning control method and device of air conditioner, storage medium and program product

Abstract

The invention provides a self-cleaning control method and device for an air conditioner, a storage medium and a program product, and the method comprises the steps that after the air conditioner enters a sleep mode, the air conditioner is controlled to enter a refrigeration condensation stage, so that condensation is formed on the surface of an indoor heat exchanger of the air conditioner; when the current moment reaches the preset moment and the temperature difference value between the indoor environment temperature and the set temperature of the air conditioner is smaller than or equal to a preset temperature difference threshold value, the air conditioner is controlled to enter a refrigeration frosting stage; and when it is detected that the temperature of the indoor heat exchanger meets the preset defrosting execution condition, a defrosting stage is started, non-reversing defrosting is conducted by controlling the rotating speed of an inner fan, the frequency of a compressor, the opening degree of a throttling device and the rotating speed of an outer fan, and self-cleaning of the air conditioner is achieved. According to the scheme provided by the invention, air conditioner self-cleaning can be carried out without specially consuming time.

Description

Technical Field

[0001] The present invention relates to the field of control, and in particular to a self-cleaning control method, device, storage medium and program product for an air conditioner. Background Art

[0002] With the increasing popularity of home air conditioners, people's demand for air conditioning quality is increasing. However, after a certain period of use, dust in the room's air will flow through the heat exchanger with the incoming air. Some dust particles will adhere to the heat exchanger surface, forming air-side fouling. This will inevitably affect the heat transfer and pressure drop of the heat exchanger, thereby reducing its performance and easily leading to the rapid growth of bacteria on the heat exchanger surface. The growth and accumulation of bacteria will produce various sticky secretions, which will attract more dust on the heat exchanger surface, forming a vicious cycle.

[0003] In the related art, the self-cleaning function of household air conditioners generally uses a high-temperature drying solution. This technology removes dirt by operating the air conditioner in high-temperature mode, using hot air to dry out moisture on the surface of the evaporator. The high temperature kills bacteria and mold attached to the evaporator, while also evaporating condensed water, preventing mold caused by prolonged moisture retention. However, implementing this function requires a long cycle, and users often need to reserve a long time for it to run, which is very inconvenient. Summary of the Invention

[0004] The main purpose of the present invention is to overcome the defects of the above-mentioned related technologies and provide a self-cleaning control method, device, storage medium and program product for air conditioners to solve the problem that the high-temperature drying self-cleaning solution in the related technologies requires a long cycle, which brings inconvenience to users.

[0005] On one hand, the present invention provides a self-cleaning control method for an air conditioner, comprising: after the air conditioner enters a sleep mode, controlling the air conditioner to enter a refrigeration condensation stage to cause condensation on the surface of the indoor heat exchanger of the air conditioner; when the preset time is reached at the current moment and the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner is less than or equal to a preset temperature difference threshold, controlling the air conditioner to enter a refrigeration frost stage; when it is detected that the indoor heat exchanger temperature meets the preset defrost execution conditions, entering the defrost stage, and performing non-reversing defrosting by controlling the internal fan speed, the compressor frequency, the throttling device opening and the external fan speed, thereby realizing self-cleaning of the air conditioner.

[0006] Optionally, controlling the air conditioner to enter the refrigeration and frosting stage includes: controlling the air guide plate of the air conditioner to be at a position with a minimum opening angle and / or controlling the internal fan of the air conditioner to reduce a first preset speed value.

[0007] Optionally, the preset defrost execution conditions include: the indoor heat exchanger temperature is less than or equal to a preset temperature value, and the duration reaches a preset time.

[0008] Optionally, non-reversing defrosting is performed by controlling the internal fan speed, compressor frequency, throttling device opening and external fan speed, including: controlling the external fan speed to reduce the second preset speed value, controlling the internal fan to maintain the speed of the frosting stage or reduce the speed to 0, controlling the throttling device opening to increase to a preset maximum opening, and controlling the compressor to operate according to the set defrost frequency.

[0009] Optionally, after the sleep cleaning function of the air conditioner is turned on, the air conditioner is controlled to enter sleep mode and the steps of the method of the present invention are executed; and / or; after the air conditioner enters sleep mode, it is determined whether the conditions for executing the sleep self-cleaning function are met. If it is determined that the conditions for executing the sleep self-cleaning function are met, the steps of the method of the present invention are executed.

[0010] Optionally, it also includes: when the time of entering the defrost stage reaches the set time, exiting the self-cleaning function and continuing to run the sleep mode.

[0011] On the other hand, the present invention provides a self-cleaning control device for an air conditioner, comprising: a first control unit, for controlling the air conditioner to enter a refrigeration and condensation stage after the air conditioner enters a sleep mode, so that condensation occurs on the surface of the indoor heat exchanger of the air conditioner; a second control unit, for controlling the air conditioner to enter a refrigeration and frosting stage when the preset time has been reached at the current moment and the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner is less than or equal to a preset temperature difference threshold; a detection unit, for detecting whether the indoor heat exchanger temperature meets the preset defrost execution condition; a third control unit, for entering the defrost stage when the detection unit detects that the indoor heat exchanger temperature meets the preset defrost execution condition, and performing non-reversing defrost by controlling the internal fan speed, the compressor frequency, the throttling device opening and the external fan speed, thereby realizing self-cleaning of the air conditioner.

[0012] Optionally, the second control unit controls the air conditioner to enter the refrigeration and frosting stage, including: controlling the air guide plate of the air conditioner to be at the position with the minimum opening angle and / or controlling the internal fan of the air conditioner to reduce a first preset speed value.

[0013] Optionally, the preset defrost execution conditions include: the indoor heat exchanger temperature is less than or equal to a preset temperature value, and the duration reaches a preset time.

[0014] Optionally, the third control unit performs non-reversing defrosting by controlling the internal fan speed, compressor frequency, throttling device opening and external fan speed, including: controlling the external fan speed to reduce the second preset speed value, controlling the internal fan to maintain the speed of the frosting stage or reduce the speed to 0, controlling the throttling device opening to increase to a preset maximum opening, and controlling the compressor to operate according to the set defrost frequency.

[0015] Optionally, it also includes: a judgment unit; the judgment unit is used to judge whether the sleep function of the air conditioner is turned on, and after the sleep cleaning function of the air conditioner is turned on, control the air conditioner to enter the sleep mode and execute the function of the device of the present invention; and / or; the judgment unit is used to judge whether the conditions for executing the sleep self-cleaning function are met after the air conditioner enters the sleep mode, and if it is judged that the conditions for executing the sleep self-cleaning function are met, execute the function of the device of the present invention.

[0016] Optionally, it also includes: a fourth control unit, which is used to exit the self-cleaning function and continue to run the sleep mode when the time to enter the defrost stage reaches a set time.

[0017] Another aspect of the present invention provides a storage medium having a computer program stored thereon, wherein the program implements the steps of any of the aforementioned methods when executed by a processor.

[0018] In another aspect, the present invention provides an air conditioner, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the program.

[0019] In another aspect, the present invention provides an air conditioner comprising any of the aforementioned self-cleaning control devices.

[0020] In another aspect, the present invention provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0021] According to the technical solution of the present invention, after the air conditioner enters the sleep mode, the self-cleaning function is executed, which can enable the whole machine to complete the evaporator condensation stage, evaporator frosting stage, and evaporator defrosting stage during the refrigeration operation without stopping the machine to switch the four-way valve. In addition, combined with the user's sleep mode usage process, a slightly higher temperature can improve the sleep quality. In the refrigeration frosting and defrosting stage, the internal fan speed is reduced, the heat exchange between the indoor heat exchanger and the indoor environment is reduced, and the inner ring temperature is appropriately increased to help improve the user's sleep quality.

[0022] According to the technical solution of the present invention, the evaporator can be self-cleaned without shutting down the entire machine, which can improve the user's sleep quality. There is no need to spend special time on air conditioner self-cleaning, thereby improving usage comfort and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 1 is a schematic diagram of an embodiment of a self-cleaning control method for an air conditioner provided by the present invention;

[0025] Figure 2 1 is a method schematic diagram of another embodiment of the self-cleaning control method for an air conditioner provided by the present invention;

[0026] Figure 3 1 is a schematic diagram of a method of a specific embodiment of the self-cleaning control method of an air conditioner provided by the present invention;

[0027] Figure 4 This is a structural block diagram of an embodiment of the self-cleaning control device for an air conditioner provided by the present invention;

[0028] Figure 5 It is a structural block diagram of an embodiment of the self-cleaning control device for an air conditioner provided by the present invention. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Related technologies use a high-temperature drying method for self-cleaning in air conditioners, which typically involves the following stages: evaporator condensation, evaporator frosting, and evaporator defrosting. Switching from cooling to heating mode requires shutting down the unit to energize the four-way valve and redirect the refrigerant. This cycle is lengthy and inconvenient for users.

[0032] The invention provides a self-cleaning control method for an air conditioner.

[0033] Figure 1 1 is a schematic diagram of an embodiment of a self-cleaning control method for an air conditioner provided by the present invention.

[0034] like Figure 1 As shown, according to one embodiment of the present invention, the self-cleaning control method of the air conditioner includes at least step S110, step S120 and step S130.

[0035] Step S110 , after the air conditioner enters the sleep mode, controlling the air conditioner to enter a cooling and condensation stage, so as to cause condensation on the surface of the indoor heat exchanger of the air conditioner.

[0036] In one embodiment, after the sleep cleaning function of the air conditioner is activated, the air conditioner is controlled to enter sleep mode and the steps of the method of the present invention are executed. For example, before going to bed, the user sets the target temperature using a remote control or other means and sends a command to the air conditioner to activate the healthy sleep cleaning function. The air conditioner indoor unit receives the information and activates the sleep cleaning function.

[0037] In another specific embodiment, after the air conditioner enters the sleep mode, it is determined whether the conditions for executing the sleep self-cleaning function are met. If it is determined that the conditions for executing the sleep self-cleaning function are met, the steps of the method of the present invention are executed.

[0038] Specifically, after the air conditioner enters sleep mode according to a user instruction or automatically enters sleep mode upon satisfying a condition for entering sleep mode (for example, when the air conditioner is turned on, it is determined that the user has entered a sleep state upon reaching a preset sleep mode on time and / or detecting that the indoor light intensity has dropped to a preset light intensity threshold), it is determined whether the air conditioner meets the conditions for executing the sleep self-cleaning function. If it is determined that the conditions for executing the sleep self-cleaning function are met, the steps of the method of the present invention are executed. The condition for executing the sleep self-cleaning function may, for example, include: the air conditioner has not performed self-cleaning for a preset cumulative operating time.

[0039] After the air conditioner enters the sleep mode, the air conditioner is controlled to enter the cooling and condensation stage. Specifically, the temperature of the indoor heat exchanger (evaporator) of the air conditioner is set to be lower than the current dew point temperature, so that condensation forms on the surface of the indoor heat exchanger (evaporator) to cover the dust on the surface of the indoor heat exchanger.

[0040] Step S120: When the current time reaches the preset time and the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner is less than or equal to the preset temperature difference threshold, control the air conditioner to enter the refrigeration and frosting stage.

[0041] Specifically, after running for a period of time (e.g., 2-3 hours) during the cooling and condensation phase, the indoor heat exchanger (evaporator) can fully condense, and the indoor ambient temperature has generally reached the set temperature, meeting the comfort requirements. It is determined whether the temperature difference ΔT between the indoor ambient temperature and the set temperature is less than or equal to a preset temperature difference threshold (for example, whether ΔT ≤ 0°C is determined. Because the air conditioner generally has cooling temperature compensation to meet the user's comfort requirements during cooling, the actual temperature will be 1-2°C lower than the set temperature. The self-cleaning function only requires that the inner ring temperature reaches the user's expected temperature). If the temperature difference ΔT between the indoor ambient temperature and the set temperature is less than or equal to the preset temperature difference threshold, and the real-time time reaches a preset time (e.g., 3:00 a.m.), the cooling and frosting phase is entered. The preset time can specifically be the time when the user has fallen asleep. The air conditioner is equipped with an electronic component (e.g., RTC) that can record real-time time, thereby determining whether the preset time has been reached.

[0042] During the refrigeration frosting stage, frost is formed on the surface of the indoor heat exchanger of the air conditioner. Specifically, the air guide plate of the air conditioner is controlled to be in a position with the minimum opening angle and / or the internal fan of the air conditioner is controlled to reduce a first preset speed value. For example, the position of the air guide plate is set to N fixed grids (for example, 5 fixed grids), and the angle of the air guide plate is gradually expanded from small to large, and fixed grid one is the position where the air guide plate has the minimum opening angle. This opening angle is the angle at which the air outlet of the indoor unit of the air conditioner is relatively unsmooth, and the air outlet is also at the smallest position. As the air outlet becomes smaller, the air volume will become smaller, that is, both the air inlet and the air outlet will become smaller, thereby reducing the heat exchange between the indoor heat exchanger and the indoor environment, so that the temperature of the indoor heat exchanger (evaporator) tube can be reduced to a lower temperature until a frost layer is formed on the surface of the indoor heat exchanger (evaporator). The frost layer on the surface of the evaporator can wrap up dust, bacteria and other substances attached to the fins.

[0043] At the same time, during this phase, the internal fan is controlled to reduce its speed to a first preset value. For example, by reducing it by 100 r / min, this is also to reduce the heat exchange between the indoor heat exchanger and the indoor environment. Firstly, this is to lower the temperature of the indoor heat exchanger tubes to a lower temperature. Secondly, it is to ensure the user's sleeping comfort by reducing the amount of cold air blowing into the room. The indoor environment does not drop too low during this phase. In addition, during this time period, the user generally enters the rapid eye movement (REM) sleep stage, which is dominated by REM sleep. The human body is more sensitive to low temperatures during this stage. Therefore, appropriately increasing the inner ring temperature can help improve the user's sleep quality.

[0044] Step S130, when it is detected that the temperature of the indoor heat exchanger meets the preset defrosting conditions, the defrosting stage is entered, and non-reversing defrosting is performed by controlling the internal fan speed, compressor frequency, throttling device opening and external fan speed to achieve self-cleaning of the air conditioner.

[0045] The preset defrost execution condition may include that the indoor heat exchanger temperature is less than or equal to the preset temperature value and the duration reaches the preset time. For example, the indoor heat exchanger temperature (for example, the indoor heat exchanger pipe temperature) T 内管温 ≤-3℃ and last for ≥15min to ensure that there is enough frost on the fins of the indoor heat exchanger.

[0046] Specifically, the speed of the external fan is controlled to be reduced to a second preset speed value, and according to the temperature difference between the indoor ambient temperature and the set temperature, the speed of the internal fan is controlled to maintain at the speed of the frosting stage or the speed is reduced to 0, the opening of the throttling device is controlled to increase to a preset maximum opening, and the compressor is controlled to operate according to the set defrosting frequency.

[0047] Control the speed of the outdoor fan to reduce the second preset speed value, for example, reduce it by 100r, that is, the outdoor heat exchanger (condenser) reduces the heat exchange with the outdoor environment, and maintains the temperature of the high-temperature refrigerant discharged from the compressor. Control the speed of the indoor fan to maintain a low speed in the frosting stage, which can avoid the internal temperature from being too high during the defrosting stage. If the indoor ambient temperature T 内环 With the set temperature T 设定 If the temperature difference is less than or equal to the preset temperature difference threshold, the internal fan is controlled to maintain the speed at the frosting stage. 内环 With the set temperature T 设定 If the temperature difference is greater than the preset temperature difference threshold, the fan speed is controlled to be reduced to 0. For example, if T 内环 -T 设定 If the temperature is ≤2°C, the internal fan speed is kept low during the frosting phase; if Tinner loop - T setting is >2°C, the internal fan speed is controlled to 0. The throttling device (such as the electronic expansion valve) is controlled to open to the maximum, so that the system achieves micro-throttling or even no throttling. At this time, the high-temperature refrigerant flows directly through the indoor evaporator, defrosting the evaporator, causing dust on the evaporator to flow to the water tray as it defrosts, achieving self-cleaning of the evaporator. The compressor is controlled to operate according to the set defrost frequency, for example 50Hz.

[0048] Figure 2 It is a method schematic diagram of another embodiment of the self-cleaning control method of the air conditioner provided by the present invention.

[0049] like Figure 2 As shown, according to another embodiment of the present invention, the self-cleaning control method of the air conditioner further includes step S140.

[0050] Step S140: When the time of entering the defrost stage reaches the set time, the self-cleaning function is exited and the sleep mode is continued.

[0051] Specifically, when the defrost operation time reaches a set time (for example, it can be set to 3 to 5 minutes), the air conditioner exits the self-cleaning mode and continues to operate in the sleep mode.

[0052] In order to clearly illustrate the technical solution of the present invention, the execution process of the self-cleaning control method of the air conditioner provided by the present invention is described below with reference to a specific embodiment.

[0053] Figure 3 FIG. 1 is a schematic diagram of a specific embodiment of the self-cleaning control method for an air conditioner provided by the present invention. Figure 3 As shown, the user sets the healthy sleep mode. After receiving the user's instruction, the sleep mode is activated and the cooling condensation stage is entered. The internal fan speed is reduced, causing dew to form on the evaporator surface, enveloping the dust on the evaporator surface. When the temperature difference between the indoor ambient temperature and the set temperature is less than or equal to the preset temperature difference threshold, the cooling frost stage is entered. In the cooling frost stage, the air guide plate angle and the internal fan speed are controlled to cause frost on the evaporator surface. It is then determined whether the preset defrost execution conditions are met. If the preset defrost execution conditions are met, the defrost stage is entered. By controlling the external fan speed, the internal fan speed, the compressor frequency, and the electronic expansion valve opening, non-reversing defrost is performed to achieve self-cleaning of the air conditioner. It is then determined whether the defrost stage time has reached the set time. If the defrost stage time has reached the set time, the self-cleaning mode is exited and the sleep mode operation is resumed.

[0054] The invention also provides a self-cleaning control device for an air conditioner.

[0055] Figure 4 FIG. 1 is a structural block diagram of an embodiment of the self-cleaning control device for an air conditioner provided by the present invention. Figure 4 As shown, the self-cleaning control device 100 includes: a first control unit 110 , a second control unit 120 , a detection unit 130 and a third control unit 140 .

[0056] The first control unit 110 is configured to control the air conditioner to enter a cooling and condensation stage after the air conditioner enters the sleep mode, so as to cause condensation on the surface of the indoor heat exchanger of the air conditioner.

[0057] Preferably, the self-cleaning control device 100 further includes a judgment unit (not shown).

[0058] In one specific embodiment, the determination unit is configured to determine whether the sleep function of the air conditioner is enabled. If the sleep cleaning function of the air conditioner is enabled, the determination unit controls the air conditioner to enter sleep mode and execute the functions of the apparatus of the present invention. For example, before going to bed, a user sets a target temperature using a remote control or other means and sends a command to the air conditioner to activate the healthy sleep cleaning function. The air conditioner indoor unit receives the command and activates the sleep cleaning function.

[0059] In another specific embodiment, the judgment unit is used to judge whether the conditions for executing the sleep self-cleaning function are met after the air conditioner enters the sleep mode, and if it is judged that the conditions for executing the sleep self-cleaning function are met, the function of the device of the present invention is executed.

[0060] Specifically, after the air conditioner enters sleep mode according to a user instruction or automatically enters sleep mode upon satisfying a condition for entering sleep mode (for example, when the air conditioner is turned on, it is determined that the user has entered a sleep state upon reaching a preset sleep mode on time and / or detecting that the indoor light intensity has dropped to a preset light intensity threshold), it is determined whether the air conditioner meets the conditions for executing the sleep self-cleaning function. If it is determined that the conditions for executing the sleep self-cleaning function are met, the steps of the method of the present invention are executed. The condition for executing the sleep self-cleaning function may, for example, include: the air conditioner has not performed self-cleaning for a preset cumulative operating time.

[0061] After the air conditioner enters the sleep mode, the first control unit 110 controls the air conditioner to enter the cooling and condensation phase. Specifically, the temperature of the indoor heat exchanger (evaporator) of the air conditioner is set to be lower than the current dew point temperature, so that condensation forms on the surface of the indoor heat exchanger (evaporator) to encapsulate dust on the surface of the indoor heat exchanger.

[0062] The second control unit 120 is configured to control the air conditioner to enter a refrigeration and frosting stage when the current time reaches a preset time and the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner is less than or equal to a preset temperature difference threshold.

[0063] Specifically, during the cooling and condensation stage, after running for a period of time (for example, 2 to 3 hours), the indoor heat exchanger (evaporator) can fully condense, and the indoor ambient temperature has generally reached the set temperature, meeting the comfort requirements, and judging whether the temperature difference ΔT between the indoor ambient temperature and the set temperature is less than or equal to the preset temperature difference threshold (for example, judging whether ΔT≤0°C, because when the air conditioner is cooling, in order to meet the user's comfort requirements, there is generally cooling temperature compensation, and the actual temperature will be 1 to 2°C lower than the set temperature. This function only requires that the inner ring temperature reaches the user's expected temperature). If it is judged that the temperature difference ΔT between the indoor ambient temperature and the set temperature is less than or equal to the preset temperature difference threshold, and the real-time time reaches the preset time (for example, 3:00 am), the cooling and frosting stage is entered. The preset time can specifically be the time when the user has fallen asleep.

[0064] During the refrigeration frosting stage, frost is formed on the surface of the indoor heat exchanger of the air conditioner. Specifically, the air guide plate of the air conditioner is controlled to be in a position with the minimum opening angle and / or the internal fan of the air conditioner is controlled to reduce a first preset speed value. For example, the position of the air guide plate is set to N fixed grids (for example, 5 fixed grids), and the angle of the air guide plate is gradually expanded from small to large, and fixed grid one is the position where the air guide plate has the minimum opening angle. This opening angle is the angle at which the air outlet of the indoor unit of the air conditioner is relatively unsmooth, and the air outlet is also at the smallest position. As the air outlet becomes smaller, the air volume will become smaller, that is, both the air inlet and the air outlet will become smaller, thereby reducing the heat exchange between the indoor heat exchanger and the indoor environment, so that the temperature of the indoor heat exchanger (evaporator) tube can be reduced to a lower temperature until a frost layer is formed on the surface of the indoor heat exchanger (evaporator). The frost layer on the surface of the evaporator can wrap up dust, bacteria and other substances attached to the fins.

[0065] At the same time, during this phase, the internal fan is controlled to reduce its speed to a first preset value. For example, by reducing it by 100 r / min, this is also to reduce the heat exchange between the indoor heat exchanger and the indoor environment. Firstly, this is to lower the temperature of the indoor heat exchanger tubes to a lower temperature. Secondly, it is to ensure the user's sleeping comfort by reducing the amount of cold air blowing into the room. The indoor environment does not drop too low during this phase. In addition, during this time period, the user generally enters the rapid eye movement (REM) sleep stage, which is dominated by REM sleep. The human body is more sensitive to low temperatures during this stage. Therefore, appropriately increasing the inner ring temperature can help improve the user's sleep quality.

[0066] The detection unit 130 is used to detect whether the temperature of the indoor heat exchanger meets the preset defrosting conditions;

[0067] The third control unit 140 is used to enter the defrost stage when the detection unit detects that the temperature of the indoor heat exchanger meets the preset defrost execution conditions, and perform non-reversing defrost by controlling the internal fan speed, compressor frequency, throttling device opening and external fan speed to achieve self-cleaning of the air conditioner.

[0068] The preset defrost execution conditions may include the indoor heat exchanger temperature being less than or equal to a preset temperature value and lasting for a preset time. For example, the indoor heat exchanger temperature (e.g., the indoor heat exchanger tube temperature) TinternalTubeTemperature is ≤ -3°C and lasts for ≥ 15 minutes to ensure that a sufficient layer of frost forms on the indoor heat exchanger fins.

[0069] Specifically, the speed of the external fan is controlled to be reduced to a second preset speed value, and according to the temperature difference between the indoor ambient temperature and the set temperature, the speed of the internal fan is controlled to maintain at the speed of the frosting stage or the speed is reduced to 0, the opening of the throttling device is controlled to increase to a preset maximum opening, and the compressor is controlled to operate according to the set defrosting frequency.

[0070] Control the speed of the outdoor fan to reduce the second preset speed value, for example, reduce it by 100r, that is, the outdoor heat exchanger (condenser) reduces the heat exchange with the outdoor environment, and maintains the temperature of the high-temperature refrigerant discharged from the compressor. Control the speed of the indoor fan to maintain a low speed in the frosting stage, which can avoid the internal temperature from being too high during the defrosting stage. If the indoor ambient temperature T 内环 With the set temperature T 设定 If the temperature difference is less than or equal to the preset temperature difference threshold, the internal fan is controlled to maintain the speed at the frosting stage. 内环 With the set temperature T 设定 If the temperature difference is greater than the preset temperature difference threshold, the fan speed is controlled to be reduced to 0. For example, if T 内环 -T 设定 If the temperature is ≤2°C, the internal fan speed is kept low during the frosting phase; if Tinner loop - T setting is >2°C, the internal fan speed is controlled to 0. The throttling device (such as the electronic expansion valve) is controlled to open to the maximum, so that the system achieves micro-throttling or even no throttling. At this time, the high-temperature refrigerant flows directly through the indoor evaporator, defrosting the evaporator, causing dust on the evaporator to flow to the water tray as it defrosts, achieving self-cleaning of the evaporator. The compressor is controlled to operate according to the set defrost frequency, for example 50Hz.

[0071] Figure 5 FIG. 1 is a structural block diagram of another embodiment of the self-cleaning control device for an air conditioner provided by the present invention. Figure 5 As shown, the self-cleaning control device 100 further includes: a fourth control unit 150 .

[0072] The fourth control unit 150 is used to exit the self-cleaning function and continue to run the sleep mode when the time of entering the defrost stage reaches the set time.

[0073] Specifically, when the defrost operation time reaches a set time (for example, it can be set to 3 to 5 minutes), the air conditioner exits the self-cleaning mode and continues to operate in the sleep mode.

[0074] The present invention also provides a storage medium corresponding to the self-cleaning control method of the air conditioner, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0075] The present invention also provides an air conditioner corresponding to the self-cleaning control method of the air conditioner, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the computer program.

[0076] The present invention also provides an air conditioner corresponding to the self-cleaning control device of the air conditioner, comprising any of the aforementioned self-cleaning control devices of the air conditioner.

[0077] The present invention also provides a computer program product corresponding to the self-cleaning control method of the air conditioner, comprising a computer program, which implements the steps of any of the aforementioned methods when executed by a processor.

[0078] Based on this, the solution provided by the present invention can enable the entire machine to complete the evaporator condensation stage, evaporator frosting stage, and evaporator defrosting stage during the refrigeration operation without stopping the machine to switch the four-way valve. In addition, combined with the user's sleep mode usage process, a slightly higher temperature can improve the sleep quality. In the refrigeration frosting and defrosting stage, the internal fan speed is reduced, the heat exchange between the indoor heat exchanger and the indoor environment is reduced, and the inner ring temperature is appropriately increased to help improve the user's sleep quality.

[0079] The solution provided by the present invention can complete the self-cleaning of the evaporator without shutting down the entire machine, and can improve the user's sleep quality. There is no need to spend special time on self-cleaning of the air conditioner, thereby improving the comfort of use and user experience.

[0080] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Furthermore, each functional unit may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0081] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0082] The units described as separate components may or may not be physically separate, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0083] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the relevant technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0084] 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 self-cleaning control method for an air conditioner, characterized in that: include: After the air conditioner enters the sleep mode, controlling the air conditioner to enter the cooling and condensation stage to cause condensation on the surface of the indoor heat exchanger of the air conditioner; When the current time reaches the preset time and the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner is less than or equal to the preset temperature difference threshold, controlling the air conditioner to enter the refrigeration and frosting stage; When it is detected that the temperature of the indoor heat exchanger meets the preset defrosting conditions, the defrosting stage is entered. By controlling the internal fan speed, compressor frequency, throttling device opening and external fan speed, non-reversing defrosting is performed to achieve self-cleaning of the air conditioner.

2. The method according to claim 1, characterized in that Controlling the air conditioner to enter the refrigeration and frosting stage, comprising: The air guide plate of the air conditioner is controlled to be at a position with a minimum opening angle and / or the internal fan of the air conditioner is controlled to reduce a first preset speed value.

3. The method according to claim 1, characterized in that The preset defrosting conditions include: the indoor heat exchanger temperature is less than or equal to a preset temperature value, and the duration reaches a preset time.

4. The method according to any one of claims 1 to 3, characterized in that By controlling the internal fan speed, compressor frequency, throttling device opening and external fan speed, non-reversing defrosting is performed, including: Control the external fan speed to reduce the second preset speed value, control the internal fan to maintain the speed of the frosting stage or reduce the speed to 0, control the opening of the throttling device to increase to the preset maximum opening, and control the compressor to operate according to the set defrost frequency.

5. The method according to any one of claims 1 to 3, characterized in that Also includes: After the sleep cleaning function of the air conditioner is turned on, controlling the air conditioner to enter a sleep mode and executing the steps of the method of the present invention; and / or; After the air conditioner enters the sleep mode, it is determined whether the conditions for executing the sleep self-cleaning function are met. If it is determined that the conditions for executing the sleep self-cleaning function are met, the steps of the method of the present invention are executed.

6. The method according to any one of claims 1 to 3, characterized in that Also includes: When the time to enter the defrost stage reaches the set time, the self-cleaning function will be exited and the sleep mode will continue to operate.

7. A self-cleaning control device for an air conditioner, characterized in that: include: a first control unit, configured to control the air conditioner to enter a cooling and condensation stage after the air conditioner enters a sleep mode, so as to cause condensation on a surface of an indoor heat exchanger of the air conditioner; a second control unit, configured to control the air conditioner to enter a refrigeration and frosting stage when the current time reaches a preset time and the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner is less than or equal to a preset temperature difference threshold; A detection unit, used to detect whether the temperature of the indoor heat exchanger meets the preset defrosting conditions; The third control unit is used to enter the defrost stage when the detection unit detects that the temperature of the indoor heat exchanger meets the preset defrost execution conditions, and perform non-reversing defrost by controlling the internal fan speed, compressor frequency, throttling device opening and external fan speed to achieve self-cleaning of the air conditioner.

8. A storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

9. An air conditioner, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method according to any one of claims 1 to 6 are implemented, or the method comprises the self-cleaning control device according to claim 7.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of the method according to any one of claims 1 to 6 when the computer program is executed by a processor.

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