Air conditioner defrost control method, air conditioner and medium

Abstract

The present invention discloses an air conditioner defrost control method, an air conditioner, and a medium. The air conditioner defrost control method includes: switching to cooling mode after defrosting conditions are met; shutting down the indoor fan and controlling the air deflector to close; collecting the coil temperature of the air conditioner's indoor heat exchanger; and activating an electric auxiliary heating element when the coil temperature is below a preset temperature. This method solves the problem in the prior art of air conditioner defrosting, where the indoor heat exchanger coil temperature rapidly drops or even forms frost, resulting in a decrease in the heat exchange capacity of the heat exchanger and affecting the defrost efficiency of the outdoor heat exchanger. The method improves the defrost efficiency of the air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner defrosting control method, an air conditioner and a medium. Background Art

[0002] When the air conditioner is in heating mode, the refrigerant exchanges heat with the outdoor air through the outdoor heat exchanger, absorbs heat from the outdoor air and evaporates, enters the compressor, is compressed into high-temperature and high-pressure refrigerant vapor by the compressor, and enters the indoor heat exchanger to release heat; the heat released through the indoor heat exchanger is used to heat the indoor air, allowing people to enjoy a more comfortable environment.

[0003] However, when the outdoor ambient temperature drops to a certain level, frost will form on the surface of the outdoor heat exchanger. As the frost layer becomes thicker, the air conditioning system's performance will become increasingly poor, further affecting its heating performance and the comfort of air conditioning use. Currently, during the defrost phase of domestic air conditioners, the indoor heat exchanger absorbs heat to release heat to the outdoor heat exchanger for defrosting. At this time, the indoor unit of the air conditioner is in cooling mode, but the temperature of the indoor heat exchanger coil drops rapidly and may even frost, resulting in an increase in the thermal resistance of the heat exchanger and a decrease in heat transfer capacity, thereby affecting the defrost efficiency of the outdoor heat exchanger, resulting in low heat release efficiency of the outdoor heat exchanger and a slow defrost speed. Summary of the Invention

[0004] The embodiments of the present invention provide an air conditioner defrost control method, an air conditioner, and a medium, thereby solving the problem in the prior art that during the defrost process of the air conditioner, the temperature of the indoor heat exchanger coil drops rapidly or even frosts, thereby causing the heat exchange capacity of the heat exchanger to decrease and affecting the defrost efficiency of the outdoor heat exchanger, thereby improving the defrost efficiency of the air conditioner.

[0005] An embodiment of the present invention provides a defrost control method for an air conditioner, wherein the defrost control method for an air conditioner:

[0006] After the defrost conditions are met, switch to refrigeration mode;

[0007] Turn off the indoor fan and control the air guide plate to close;

[0008] Collect the coil temperature of the indoor heat exchanger of the air conditioner;

[0009] When the coil temperature is lower than a preset temperature, the electric auxiliary heating element is turned on.

[0010] Optionally, after the step of turning on the electric auxiliary heating element when the coil temperature is lower than a preset temperature, the method further includes:

[0011] Obtaining a first temperature difference between a current ambient temperature and a current coil temperature of the indoor heat exchanger;

[0012] controlling the opening angle of the air guide plate and the operating state of the fan according to the first temperature difference;

[0013] When the first temperature difference is greater than or equal to a first preset temperature difference, turning on the indoor fan;

[0014] The air guide plate is controlled to open to a preset angle to block part of the air outflow from the air outlet of the air conditioner.

[0015] Optionally, the step of turning on the indoor fan includes:

[0016] obtaining a target speed of the indoor fan according to the first temperature difference;

[0017] The indoor fan is turned on according to the target speed.

[0018] Optionally, after the step of turning on the indoor fan and controlling the air guide plate to open to a preset angle to partially block air from the air outlet of the air conditioner when the first temperature difference is greater than or equal to a first preset temperature difference, the method further includes:

[0019] Obtaining a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger;

[0020] When the second temperature difference is less than a second preset temperature difference, the air guide plate is controlled to close and the indoor fan is turned off, and the second preset temperature difference is less than the first preset temperature difference.

[0021] Optionally, while or after the indoor fan is turned on and the air guide plate is controlled to open to a preset angle, the following steps are performed:

[0022] The operating frequency of the compressor of the air conditioner is increased.

[0023] Optionally, after the step of increasing the operating frequency of the compressor of the air conditioner, the method further comprises:

[0024] Obtaining a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger;

[0025] When the second temperature difference is less than a second preset temperature difference, the operating frequency of the compressor is restored to the operating frequency before the increase.

[0026] Optionally, when the second temperature difference is less than a second preset temperature difference, controlling the air guide plate to close and turning off the indoor fan, and after the step of the second preset temperature difference being less than the first preset temperature difference, the method further includes:

[0027] Determining whether the air conditioner meets the defrost end condition;

[0028] When the air conditioner does not meet the defrost end condition, the power of the electric auxiliary heating element is increased.

[0029] Optionally, after the step of determining whether the air conditioner meets the defrost end condition, the method further includes:

[0030] When the air conditioner meets the defrost end condition, it switches to the heating mode and turns off the electric auxiliary heating element.

[0031] An embodiment of the present invention further provides an air conditioner, comprising a memory, a processor, and an air conditioner defrost control program stored in the memory and executable on the processor, wherein the processor implements the above-described method when executing the air conditioner defrost control program.

[0032] An embodiment of the present invention further provides a computer-readable storage medium storing an air conditioner defrost control program. When the air conditioner defrost control program is executed by a processor, the air conditioner defrost control method described above is implemented.

[0033] The air conditioner defrost control method, air conditioner, and medium provided in embodiments of the present invention switch the air conditioner to cooling mode when defrost conditions are met, turning off the indoor fan and controlling the air deflector to close. The system then collects the coil temperature of the indoor heat exchanger in real time. When the coil temperature falls below a preset temperature, the electric auxiliary heating element is activated to heat the indoor heat exchanger. This heating of the indoor heat exchanger when the temperature is low improves the defrost speed of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the hardware operating environment of the embodiment of the present invention;

[0035] Figure 2 This is a flow chart of a first embodiment of a voice broadcast method for an air conditioner according to the present invention;

[0036] Figure 3 This is a flow chart of a second embodiment of the voice broadcast method for an air conditioner according to the present invention;

[0037] Figure 4 FIG. 4 is a flow chart of a third embodiment of a voice announcement method for an air conditioner according to the present invention. DETAILED DESCRIPTION

[0038] During the defrost phase, an air conditioner absorbs heat from the indoor heat exchanger, releasing it to the outdoor heat exchanger for defrosting. While the indoor unit is in cooling mode, the temperature of the indoor heat exchanger coil drops rapidly, even forming frost. This reduces heat exchange capacity and impacts the defrost efficiency of the outdoor heat exchanger. To address this issue, the present invention provides an air conditioner defrost control method, comprising: switching to cooling mode when defrost conditions are met; shutting down the indoor fan and controlling the air deflector to close; collecting the coil temperature of the air conditioner's indoor heat exchanger; and activating an electric auxiliary heating element when the coil temperature falls below a preset temperature. This method improves the air conditioner's defrost efficiency.

[0039] To better understand the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0040] As an implementation method, the air conditioner can be Figure 1 shown.

[0041] The embodiment of the present invention relates to an air conditioner, which includes a processor 101, such as a CPU, a memory 102, and a communication bus 103. The communication bus 103 is used to achieve connection and communication between these components.

[0042] The memory 102 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. Figure 1 As shown, the memory 102 as a computer storage medium may include the air conditioner control program; and the processor 101 may be used to call the air conditioner control program stored in the memory 102 and perform the following operations:

[0043] After the defrost conditions are met, switch to refrigeration mode;

[0044] Turn off the indoor fan and control the air guide plate to close;

[0045] Collect the coil temperature of the indoor heat exchanger of the air conditioner;

[0046] When the coil temperature is lower than a preset temperature, the electric auxiliary heating element is turned on.

[0047] In one embodiment, the processor 101 may be configured to call the air conditioner control program stored in the memory 102 and perform the following operations:

[0048] Obtaining a first temperature difference between a current ambient temperature and a current coil temperature of the indoor heat exchanger;

[0049] controlling the opening angle of the air guide plate and the operating state of the fan according to the first temperature difference;

[0050] When the first temperature difference is greater than or equal to a first preset temperature difference, turning on the indoor fan;

[0051] The air guide plate is controlled to open to a preset angle to block part of the air outflow from the air outlet of the air conditioner.

[0052] In one embodiment, the processor 101 may be configured to call the air conditioner control program stored in the memory 102 and perform the following operations:

[0053] obtaining a target speed of the indoor fan according to the first temperature difference;

[0054] The indoor fan is turned on according to the target speed.

[0055] In one embodiment, the processor 101 may be configured to call the air conditioner control program stored in the memory 102 and perform the following operations:

[0056] Obtaining a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger;

[0057] When the second temperature difference is less than a second preset temperature difference, the air guide plate is controlled to close and the indoor fan is turned off, and the second preset temperature difference is less than the first preset temperature difference.

[0058] In one embodiment, the processor 101 may be configured to call the air conditioner control program stored in the memory 102 and perform the following operations:

[0059] The operating frequency of the compressor of the air conditioner is increased.

[0060] In one embodiment, the processor 101 may be configured to call the air conditioner control program stored in the memory 102 and perform the following operations:

[0061] Obtaining a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger;

[0062] When the second temperature difference is less than a second preset temperature difference, the operating frequency of the compressor is restored to the operating frequency before the increase.

[0063] In one embodiment, the processor 101 may be configured to call the air conditioner control program stored in the memory 102 and perform the following operations:

[0064] Determining whether the air conditioner meets the defrost end condition;

[0065] When the air conditioner does not meet the defrost end condition, the power of the electric auxiliary heating element is increased.

[0066] In one embodiment, the processor 101 may be configured to call the air conditioner control program stored in the memory 102 and perform the following operations:

[0067] When the air conditioner meets the defrost end condition, it switches to the heating mode and turns off the electric auxiliary heating element.

[0068] According to the above solution, this embodiment switches the air conditioner to cooling mode when defrosting conditions are met. The indoor fan is turned off, the air deflector is closed, and the coil temperature of the indoor heat exchanger is collected in real time. When the coil temperature falls below a preset temperature, the electric auxiliary heating element is activated to heat the indoor heat exchanger. This improves the defrosting efficiency of the air conditioner by heating the heat exchanger when the indoor heat exchanger temperature is low.

[0069] Based on the hardware architecture of the air conditioner described above, an embodiment of a method for controlling an air conditioner according to the present invention is proposed.

[0070] Reference Figure 2 , Figure 2 The first embodiment of the air conditioner control method of the present invention comprises the following steps:

[0071] Step S10: After the defrosting conditions are met, switch to the cooling mode;

[0072] Step S20: Turn off the indoor fan and control the air guide plate to close;

[0073] When the air conditioner's outdoor heat exchanger reaches defrost conditions, the air conditioner's operating mode is switched to cooling mode to defrost the outdoor heat exchanger. Since the indoor heat exchanger temperature is lower in cooling mode and frost may form, the indoor fan needs to be turned off and the air deflector closed to prevent cold air from blowing in.

[0074] Step S30, collecting the coil temperature of the indoor heat exchanger of the air conditioner;

[0075] It should be noted that the air conditioner is an air conditioner comprising an outdoor unit and an indoor unit or other air conditioner. The air conditioner is provided with a temperature detection module for detecting the coil temperature of the indoor unit heat exchanger. The temperature detection module can be a temperature probe or a temperature sensor, etc., and the temperature detection module can be provided on the coil of the indoor heat exchanger.

[0076] After the indoor fan of the air conditioner is turned off and the air guide plate is controlled to be closed, the coil temperature of the indoor heat exchanger of the air conditioner is collected in real time so that the coil temperature can be monitored and adjusted, thereby delaying the drop in the temperature of the indoor heat exchanger and accelerating the defrosting efficiency of the outdoor heat exchanger.

[0077] Step S40: When the coil temperature is lower than a preset temperature, the electric auxiliary heating element is turned on.

[0078] It should be noted that during the defrost phase of an air conditioner, the rapid drop in indoor heat exchanger temperature can cause frost to form on the indoor heat exchanger, which in turn slows the defrosting of the outdoor heat exchanger. Therefore, an electric auxiliary heating element can be installed in the air conditioner. When the indoor heat exchanger temperature is high, the compressor normally defrosts the outdoor heat exchanger. When the indoor heat exchanger temperature is low, the electric auxiliary heating element is activated to heat the heat exchanger, slowing the drop in the indoor heat exchanger coil temperature.

[0079] Optionally, the preset temperature range is less than or equal to 30 degrees Celsius, meaning the preset temperature is one of the temperature values ​​less than or equal to 30 degrees Celsius. The air conditioner may pre-store a correspondence between the coil temperature and the electric auxiliary heating switch. After the air conditioner temperature acquisition device acquires the coil temperature of the indoor heat exchanger, it determines whether to activate the electric auxiliary heating element based on the coil temperature. When the coil temperature is greater than or equal to the preset temperature, the electric auxiliary heating element is not activated. When the coil temperature is less than the preset temperature, the electric auxiliary heating element is activated to increase the coil temperature of the indoor heat exchanger, thereby accelerating the defrosting of the heat exchanger.

[0080] In the technical solution provided in this embodiment, the air conditioner switches to cooling mode when defrost conditions are met, shuts off the indoor fan, closes the air deflector, and collects the coil temperature of the indoor heat exchanger in real time. When the coil temperature falls below a preset temperature, the electric auxiliary heating element is activated to heat the indoor heat exchanger. This improves the defrost efficiency of the air conditioner by heating the indoor heat exchanger when the temperature is low.

[0081] Reference Figure 3 , Figure 3 This is a second embodiment of the air conditioner control method of the present invention, based on the first embodiment, and after step S40, further comprising:

[0082] Step S50: obtaining a first temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger;

[0083] The air conditioner may have multiple temperature collecting devices, which may be arranged outside the indoor unit of the air conditioner to collect the indoor ambient temperature in real time. The ambient temperature refers to the temperature of the indoor environment where the indoor unit of the air conditioner is located.

[0084] It should be noted that, during the process of defrosting the outdoor heat exchanger, the indoor heat exchanger may be frosted due to the cooling of the indoor heat exchanger.

[0085] To prevent frost on the indoor heat exchanger and increase the defrosting speed of the outdoor heat exchanger, the ambient temperature can be obtained after electric auxiliary heating is turned on, and a difference can be calculated between the ambient temperature and the coil temperature. Specifically, the difference is the coil temperature minus the ambient temperature. Because the ambient temperature and the coil temperature both change in real time, when the first ambient temperature and the first coil temperature are collected, the first temperature difference is calculated based on the first ambient temperature and the first coil temperature.

[0086] Step S60: controlling the opening angle of the air guide plate and the operating state of the fan according to the first temperature difference;

[0087] It should be noted that delaying the temperature drop of the heat exchanger can speed up the defrosting speed of the outdoor heat exchanger, while different differences between the indoor heat exchanger coil temperature and the ambient temperature, as well as the air guide opening angle and the operating status of the fan can have different effects on the temperature drop of the heat exchanger.

[0088] A larger temperature difference indicates that the heat exchanger coil temperature is higher than the indoor ambient temperature, while a smaller temperature difference indicates that the heat exchanger coil temperature is closer to the indoor ambient temperature. Therefore, the opening angle of the air deflector and the operating status of the fan can be controlled based on the first temperature difference to slow the drop in the indoor heat exchanger temperature and accelerate the defrosting of the outdoor heat exchanger.

[0089] Step S70: When the first temperature difference is greater than or equal to a first preset temperature difference, the indoor fan is turned on and the air guide plate is controlled to open to a preset angle to block part of the air outflow from the air outlet of the air conditioner.

[0090] Optionally, the step of turning on the indoor fan includes:

[0091] obtaining a target speed of the indoor fan according to the first temperature difference;

[0092] The indoor fan is turned on according to the target speed.

[0093] Optionally, the first temperature difference is greater than or equal to 5 degrees, and the target speed may be 300-600 rpm. The preset angle is between the air guide plate closing angle and the cold wind protection angle, and is used to block part of the air outflow from the air conditioner outlet, thereby directing the higher temperature air outflow from the air outlet back to the indoor heat exchanger.

[0094] In one embodiment, the speed of the indoor fan is pre-associated and stored with the first temperature difference. When the first temperature difference is greater than or equal to a first preset temperature difference, a target speed for the indoor fan corresponding to the first temperature difference is determined. When the heat exchanger temperature is higher than the ambient temperature, that is, when the first temperature difference is greater than the first preset temperature difference, the air guide is controlled to open to a preset angle and the indoor fan is turned on at the target speed. At this time, the outlet air temperature is higher. The preset angle of the air guide can guide the higher temperature outlet air back to the indoor heat exchanger through the air outlet, thereby delaying the drop in the indoor heat exchanger temperature, preventing frost on the indoor heat exchanger, and accelerating defrosting of the outdoor heat exchanger.

[0095] Optionally, if it is detected that the first temperature difference is less than the first preset temperature difference, the indoor fan is kept turned off and the air guide plate is kept closed.

[0096] Furthermore, in one embodiment, while or after the indoor fan is turned on and the air guide plate is controlled to open to a preset angle, the following steps are performed:

[0097] The operating frequency of the compressor of the air conditioner is increased.

[0098] It can be understood that when the temperature of the indoor heat exchanger is higher than the ambient temperature, the air guide plate and the fan are turned on to form hot return air to blow to the indoor heat exchanger. At this time, the temperature of the indoor heat exchanger can be ensured to drop slowly, so the operating frequency of the compressor can be increased, thereby speeding up the heating power of the outdoor heat exchanger and thus speeding up the defrosting speed of the outdoor heat exchanger.

[0099] Optionally, in one embodiment, after the step of increasing the operating frequency of the compressor of the air conditioner, it also includes: obtaining a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger; when the second temperature difference is less than a second preset temperature difference, restoring the operating frequency of the compressor to the operating frequency before the increase.

[0100] Optionally, when the air deflector is closed and the fan is off, the compressor is controlled to operate at a first preset frequency. When the indoor fan is turned on and the air deflector is opened to a preset angle, the compressor is increased to a second preset frequency. Furthermore, when the second temperature difference is less than the second preset temperature difference, i.e., when the air deflector and fan are closed again, the compressor operating frequency is restored to the first preset frequency. The first preset frequency may be between 70 and 90 Hz, and the second preset frequency may be between 80 and 100 Hz.

[0101] In the technical solution provided in this embodiment, a first temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger is obtained; the opening angle of the air deflector and the operating status of the fan are controlled based on the first temperature difference; when the first temperature difference is greater than or equal to a first preset temperature difference, the indoor fan is turned on and the air deflector is controlled to open to a preset angle to partially block the air outflow from the air conditioner's air outlet. Thus, when the coil temperature of the indoor heat exchanger is higher than the ambient temperature, the air deflector is opened to the preset angle and the fan is turned on to generate hot return air blowing through the indoor heat exchanger, thereby slowing the temperature drop of the indoor heat exchanger and improving the defrosting efficiency of the outdoor heat exchanger.

[0102] Reference Figure 4 , Figure 4 This is a third embodiment of the air conditioner control method of the present invention, based on the first or second embodiment, and after step S70, further comprising:

[0103] Step S80: obtaining a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger;

[0104] Since the ambient temperature and the coil temperature change in real time, after controlling the opening angle of the air guide plate and the operating status of the fan according to the first temperature difference, the second coil temperature and the second ambient temperature are collected again after a preset time interval, and the second temperature difference is calculated.

[0105] Step S90: When the second temperature difference is less than a second preset temperature difference, the air guide plate is controlled to close and the indoor fan is turned off, and the second preset temperature difference is less than the first preset temperature difference.

[0106] Optionally, when the second temperature difference is greater than a second preset temperature difference, the fan is kept on and the air guide is kept open to a preset angle to partially block the air from the air outlet of the air conditioner, thereby generating hot return air. At this time, the outlet air temperature is relatively high. The preset angle of the air guide can guide the higher temperature air back through the air outlet to the indoor heat exchanger, thereby delaying the temperature drop of the indoor heat exchanger, preventing frost on the indoor heat exchanger, and accelerating the defrosting of the outdoor heat exchanger.

[0107] Optionally, when the second temperature difference is less than a second preset temperature difference, the air guide plate is controlled to close and the indoor fan is turned off, and the second preset temperature difference is less than the first preset temperature difference.

[0108] The second temperature difference is within the range of 0 degrees or less. A larger temperature difference indicates a higher heat exchanger coil temperature relative to the indoor ambient temperature, while a smaller temperature difference indicates a heat exchanger coil temperature closer to or even lower than the indoor ambient temperature. At this point, the heat exchanger coil temperature is low. If the outlet air continues to be directed back to the heat exchanger, the resulting return air temperature will be low, accelerating the drop in the indoor heat exchanger temperature. Therefore, it is necessary to control the air deflector to close and shut down the indoor fan. Optionally, the electric auxiliary heating element remains on at this time to ensure defrosting of the outdoor heat exchanger.

[0109] Furthermore, after step S90, the method further includes:

[0110] Determining whether the air conditioner meets the defrost end condition;

[0111] When the air conditioner meets the defrost end condition, it switches to the heating mode and turns off the electric auxiliary heating element.

[0112] The defrost termination condition may be that the coil temperature of the outdoor heat exchanger is greater than or equal to a preset defrost temperature. Optionally, when the coil temperature of the outdoor heat exchanger is greater than or equal to the preset defrost temperature, the air conditioner determines that defrost of the outdoor heat exchanger has completed, switches to heating mode, and turns off the electric auxiliary heating element. Optionally, if the coil temperature of the outdoor heat exchanger is less than the preset defrost temperature, the air conditioner determines that defrost of the outdoor heat exchanger has not completed, and increases the power of the electric auxiliary heating element to accelerate the defrost of the outdoor heat exchanger.

[0113] In the technical solution provided in this embodiment, the air conditioner detects a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger. When this second temperature difference is less than a second preset temperature difference, the air deflector is closed and the indoor fan is turned off. The second preset temperature difference is less than the first preset temperature difference. This prevents cold air from blowing back into the indoor heat exchanger when the indoor heat exchanger temperature is low, ensuring defrosting of the outdoor heat exchanger. After closing the fan and air deflector, the air conditioner determines whether defrosting is complete. If defrosting is not yet complete, the power of the electric auxiliary heating element is increased to accelerate defrosting efficiency.

[0114] An embodiment of the present invention further provides an air conditioner, comprising a memory, a processor, and an air conditioner defrost control program stored in the memory and executable on the processor, wherein the processor implements the above-described method when executing the air conditioner defrost control program.

[0115] An embodiment of the present invention further provides a computer-readable storage medium storing an air conditioner defrost control program. When the air conditioner defrost control program is executed by a processor, the air conditioner defrost control method described above is implemented.

[0116] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0117] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0118] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0119] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0120] It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third etc. does not indicate any order. These words may be interpreted as names.

[0121] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0122] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the present invention.

[0123] Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

Claims

1. A defrost control method for an air conditioner, characterized in that: The air conditioner defrost control method comprises: After the defrost conditions are met, switch to refrigeration mode; Turn off the indoor fan and control the air guide plate to close; Collect the coil temperature of the indoor heat exchanger of the air conditioner; When the coil temperature is lower than a preset temperature, turning on the electric auxiliary heating element; Obtaining a first temperature difference between a current ambient temperature and a current coil temperature of the indoor heat exchanger; controlling the opening angle of the air guide plate and the operating state of the fan according to the first temperature difference; When the first temperature difference is greater than or equal to a first preset temperature difference, turning on the indoor fan; The air guide plate is controlled to open to a preset angle to block part of the air outflow from the air outlet of the air conditioner.

2. The air conditioner defrost control method according to claim 1, characterized in that: The step of starting the indoor fan includes: obtaining a target speed of the indoor fan according to the first temperature difference; The indoor fan is turned on according to the target speed.

3. The air conditioner defrost control method according to claim 1, characterized in that: After the step of turning on the indoor fan and controlling the air guide plate to open to a preset angle to block part of the air outflow from the air outlet of the air conditioner when the first temperature difference is greater than or equal to a first preset temperature difference, the method further includes: Obtaining a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger; When the second temperature difference is less than a second preset temperature difference, the air guide plate is controlled to close and the indoor fan is turned off, and the second preset temperature difference is less than the first preset temperature difference.

4. The air conditioner defrost control method according to claim 1, wherein: While or after the indoor fan is turned on and the air guide plate is controlled to open to a preset angle, the following steps are performed: The operating frequency of the compressor of the air conditioner is increased.

5. The air conditioner defrost control method according to claim 4, characterized in that: After the step of increasing the operating frequency of the compressor of the air conditioner, the method further includes: Obtaining a second temperature difference between the current ambient temperature and the current coil temperature of the indoor heat exchanger; When the second temperature difference is less than a second preset temperature difference, the operating frequency of the compressor is restored to the operating frequency before the increase.

6. The air conditioner defrost control method according to claim 3, characterized in that: After the step of controlling the air guide plate to close and turning off the indoor fan when the second temperature difference is less than the second preset temperature difference, and the second preset temperature difference is less than the first preset temperature difference, the method further includes: Determining whether the air conditioner meets the defrost end condition; When the air conditioner does not meet the defrost end condition, the power of the electric auxiliary heating element is increased.

7. The air conditioner defrost control method according to claim 6, characterized in that: After the step of determining whether the air conditioner meets the defrost end condition, the method further includes: When the air conditioner meets the defrost end condition, it switches to the heating mode and turns off the electric auxiliary heating element.

8. An air conditioner, characterized in that: The air conditioner includes a memory, a processor, and an air conditioner defrost control program stored in the memory and executable on the processor. When the processor executes the air conditioner defrost control program, the air conditioner defrost control method according to any one of claims 1 to 7 is implemented.

9. A computer-readable storage medium storing an air conditioner defrost control program, characterized in that: When the air conditioner defrost control program is executed by a processor, the air conditioner defrost control method according to any one of claims 1 to 7 is implemented.

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