Air conditioner defrosting and cold wind prevention control method, air conditioner and medium

Abstract

The present invention discloses a defrosting and cold air prevention control method for an air conditioner, an air conditioner, and a medium. The method comprises: upon receiving a command to enter defrost mode, shutting down the compressor; obtaining the current ambient temperature; determining a closing rate of an air deflector based on the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate; controlling the air deflector to close at the closing rate; and, after the air deflector closes, turning on the compressor and performing defrost. This method solves the technical problem in the prior art of not implementing cold air prevention control during the initial residual heat blowing phase of an air conditioner defrosting, resulting in cold air blowing on the user. The method achieves the effect of cold air prevention control during the initial residual heat blowing phase of the defrosting phase.

Description

Technical Field

[0001] The present invention relates to air conditioner technology, in particular to an air conditioner defrosting and cold wind prevention 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 temperature drops below a certain level and the humidity is suitable, frost will form on the surface of the outdoor heat exchanger. As the frost layer grows thicker, the air conditioning system's effectiveness deteriorates, further affecting its heating performance and the comfort of air conditioning use. Currently, the defrosting method used by domestic heat pump air conditioners and water heaters utilizes the compressor's exhaust temperature for hot gas defrosting. This requires switching the compressor's four-way valve to achieve defrost. At the start of defrost, the four-way reversing valve switches direction, allowing the outdoor heat exchanger to release heat and the indoor heat exchanger to absorb heat.

[0004] However, during the initial defrost phase, when the compressor is shut down and the compressor's four-way valve has not yet switched to cooling, the existing air conditioner's air deflector remains open in heating mode until the compressor switches to the four-way valve and begins cooling. Only then does the air deflector close and the fan shut off. However, during this phase, the indoor unit's heat exchanger temperature drops, but no cold airflow control is implemented, resulting in cold air blowing in and affecting comfort. Summary of the Invention

[0005] The embodiments of the present invention provide an air conditioner defrosting and cold wind prevention control method, an air conditioner and a medium, thereby solving the technical problem in the prior art that the temperature of the indoor unit heat exchanger drops during the initial residual heat blowing stage of the air conditioner defrosting but no cold wind prevention control is performed, resulting in cold wind blowing on people, and achieving the effect of cold wind prevention control during the initial residual heat blowing stage of the defrosting.

[0006] An embodiment of the present invention provides a method for controlling defrosting and preventing cold wind in an air conditioner, wherein the method comprises:

[0007] After receiving the instruction to enter the defrost mode, the compressor is turned off;

[0008] Get the current ambient temperature;

[0009] determining a closing rate of the air deflector according to the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate;

[0010] controlling the air deflector to close at the closing rate;

[0011] After the air guide plate is closed, the compressor is turned on and defrosting is performed.

[0012] Optionally, the step of determining the closing rate of the air deflector according to the ambient temperature includes:

[0013] Get the current actual angle of the wind deflector;

[0014] determining a target time required for the air deflector to rotate from the actual angle to the closed angle according to the ambient temperature, wherein the lower the ambient temperature, the shorter the target time required for the air deflector to rotate from the actual angle to the closed angle;

[0015] determining a closing rate of the air deflector according to the actual angle, the closing angle, and the time;

[0016] The air guide plate is adjusted to close at the closing rate.

[0017] Optionally, after the step of shutting down the compressor after receiving the instruction to enter the defrost mode, the method further includes:

[0018] Obtaining the operating temperature of the indoor heat exchanger of the air conditioner;

[0019] When the operating temperature meets a preset condition, reducing the speed of the indoor fan of the air conditioner;

[0020] Return to the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner until the fan stops running.

[0021] Optionally, the preset condition is that the operating temperature is less than or equal to a reference temperature corresponding to the current fan speed; and when the operating temperature satisfies the preset condition, the step of reducing the speed of the indoor fan of the air conditioner includes:

[0022] determining a temperature compensation coefficient according to the ambient temperature and a preset ambient temperature;

[0023] Determining a temperature compensation value according to the ambient temperature, a preset ambient temperature, and a temperature compensation coefficient;

[0024] The reference temperatures corresponding to the speeds of the fans of the air conditioner are determined according to the preset temperature of the heat exchanger and the temperature compensation value.

[0025] Optionally, after the step of reducing the rotation speed of the indoor fan of the air conditioner, the method further comprises:

[0026] Obtaining the running time of the indoor fan at the current fan speed;

[0027] When the operating time is greater than the first preset time, the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner is returned to execution until the fan stops running.

[0028] Optionally, after the air guide plate is closed, the step of starting the compressor and performing defrosting includes:

[0029] When the air guide plate is closed, determining whether the fan stops running;

[0030] When the fan stops running, the compressor is turned on and defrost is performed at a preset frequency.

[0031] Optionally, while the compressor is shut down, perform the following steps:

[0032] Turn on the electric auxiliary heating element of the air conditioner.

[0033] An embodiment of the present invention further provides an air conditioner, comprising:

[0034] A shut-down module, used to shut down the compressor after receiving an instruction to enter the defrost mode;

[0035] Acquisition module, used to obtain the current ambient temperature;

[0036] a determination module, configured to determine a closing rate of the air deflector according to the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate;

[0037] a control module, configured to control the air deflector to close at the closing rate;

[0038] The opening module is used to open the compressor and perform defrosting after the air guide plate is closed.

[0039] An embodiment of the present invention also provides an air conditioner, which includes a memory, a processor, and an air conditioner defrost and cold wind prevention control program stored in the memory and runnable on the processor. When the processor executes the air conditioner defrost and cold wind prevention control program, the method described above is implemented.

[0040] An embodiment of the present invention further provides a computer-readable storage medium storing an air conditioner defrost and cold wind prevention control program, which implements the above-mentioned method when executed by a processor.

[0041] In an embodiment of the present invention, a defrosting and cold draft prevention control method, air conditioner, and medium are provided. When the air conditioner shuts down the compressor in the early stages of defrosting, the air conditioner obtains the current indoor ambient temperature and determines the closing rate of the air deflector based on the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate. The air deflector is then controlled to close at the closing rate. This allows the air conditioner to slowly close the air deflector when the indoor ambient temperature is higher, allowing the air conditioner to fully utilize the waste heat from the heat exchanger for heating. When the indoor ambient temperature is lower, the air deflector is quickly closed to prevent cold drafts. Flexible control of the air deflector closing rate at different ambient temperatures improves the effectiveness of cold draft prevention control. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagram of the hardware operating environment of the embodiment of the present invention;

[0043] Figure 2 This is a flow chart of a first embodiment of the air conditioner defrosting and cold wind prevention control method of the present invention;

[0044] Figure 3 This is a flow chart of a second embodiment of the air conditioner defrosting and cold wind prevention control method of the present invention;

[0045] Figure 4 This is a flow chart of a third embodiment of the air conditioner defrosting and cold wind prevention control method of the present invention;

[0046] Figure 5 This is a schematic diagram of the internal modules of the air conditioner of the present invention;

[0047] Figure 6 This is a schematic diagram of the structure of the air guide plate in an embodiment of the air conditioner of the present invention;

[0048] Figure 7 This is a schematic structural diagram of two air guide plates in an embodiment of an air conditioner of the present invention. DETAILED DESCRIPTION

[0049] During the initial defrost stage of blowing residual heat, the compressor shuts down, causing the indoor unit's heat exchanger temperature to drop rapidly, leading to a rapid drop in the outlet air temperature. This causes cold air to blow in, resulting in a sharp change in perceived body temperature and impacting comfort. To address this issue, the present invention provides an air conditioner defrost cold air prevention control method, comprising: upon receiving a command to enter defrost mode, shutting down the compressor; obtaining the current ambient temperature; determining a closing rate for the air deflector based on the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate; controlling the air deflector to close at the closing rate; and after the air deflector closes, restarting the compressor and performing defrost. This method achieves the desired cold air prevention control effect during the initial defrost stage of blowing residual heat.

[0050] 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.

[0051] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0052] As an implementation method, the air conditioner can be Figure 1 shown.

[0053] 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.

[0054] 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 an air conditioner defrost and cold wind prevention control program; and the processor 101 may be used to call the air conditioner defrost and cold wind prevention control program stored in the memory 102 and perform the following operations:

[0055] After receiving the instruction to enter the defrost mode, the compressor is turned off;

[0056] Get the current ambient temperature;

[0057] determining a closing rate of the air deflector according to the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate;

[0058] controlling the air deflector to close at the closing rate;

[0059] After the air guide plate is closed, the compressor is turned on and defrosting is performed.

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

[0061] Get the current actual angle of the wind deflector;

[0062] determining a target time required for the air deflector to rotate from the actual angle to the closed angle according to the ambient temperature, wherein the lower the ambient temperature, the shorter the target time required for the air deflector to rotate from the actual angle to the closed angle;

[0063] determining a closing rate of the air deflector according to the actual angle, the closing angle, and the time;

[0064] The air guide plate is adjusted to close at the closing rate.

[0065] In one embodiment, the processor 101 may be configured to call the air conditioner defrost prevention cold wind control program stored in the memory 102 and perform the following operations:

[0066] Obtaining the operating temperature of the indoor heat exchanger of the air conditioner;

[0067] When the operating temperature meets a preset condition, reducing the speed of the indoor fan of the air conditioner;

[0068] Return to the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner until the fan stops running.

[0069] In one embodiment, the processor 101 may be configured to call the air conditioner defrost prevention cold wind control program stored in the memory 102 and perform the following operations:

[0070] determining a temperature compensation coefficient according to the ambient temperature and a preset ambient temperature;

[0071] Determining a temperature compensation value according to the ambient temperature, a preset ambient temperature, and a temperature compensation coefficient;

[0072] The reference temperatures corresponding to the speeds of the fans of the air conditioner are determined according to the preset temperature of the heat exchanger and the temperature compensation value.

[0073] In one embodiment, the processor 101 may be configured to call the air conditioner defrost prevention cold wind control program stored in the memory 102 and perform the following operations:

[0074] Obtaining the running time of the indoor fan at the current fan speed;

[0075] When the operating time is greater than the first preset time, the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner is returned to execution until the fan stops running.

[0076] In one embodiment, the processor 101 may be configured to call the air conditioner defrost prevention cold wind control program stored in the memory 102 and perform the following operations:

[0077] When the air guide plate is closed, determining whether the fan stops running;

[0078] When the fan stops running, the compressor is turned on and defrost is performed at a preset frequency.

[0079] In one embodiment, the processor 101 may be configured to call the air conditioner defrost prevention cold wind control program stored in the memory 102 and perform the following operations:

[0080] Turn on the electric auxiliary heating element of the air conditioner.

[0081] According to the above solution, in this embodiment, when the air conditioner shuts down the compressor in the early stages of defrosting, it obtains the current indoor ambient temperature and determines the closing rate of the air deflector based on this ambient temperature. The closing rate increases with lower ambient temperatures, and the air deflector is controlled to close at this closing rate. This allows the air conditioner to slowly close the air deflector when the indoor ambient temperature is higher, allowing it to fully utilize the waste heat from the heat exchanger for heating. When the indoor ambient temperature is lower, the air deflector quickly closes to prevent cold air from blowing in. By flexibly controlling the closing rate of the air deflector at different ambient temperatures, the air deflector achieves the desired cold air prevention effect during the initial defrosting stage, when waste heat is blown out.

[0082] Based on the hardware architecture of the air conditioner described above, an embodiment of the air conditioner defrosting and cold wind prevention control method of the present invention is proposed.

[0083] Reference Figure 2 , Figure 2 This is a first embodiment of the air conditioner defrost and cold wind prevention control method of the present invention, and the air conditioner defrost and cold wind prevention control method comprises the following steps:

[0084] Step S10: After receiving the instruction to enter the defrost mode, turn off the compressor;

[0085] Optionally, in one embodiment, while the compressor is shut down, the step of activating the air conditioner's electric auxiliary heating element is performed. Optionally, upon receiving a command to enter defrost mode, the air conditioner activates the electric auxiliary heating element to heat the indoor heat exchanger, thereby offsetting the drop in heat exchanger temperature caused by compressor shutdown, thereby slowing the rate of temperature drop in the heat exchanger and, in turn, the rate of temperature drop in the air outlet, improving cold draft prevention. Furthermore, the electric auxiliary heating element can heat the outdoor heat exchanger to improve defrost efficiency.

[0086] Step S20: obtaining the current ambient temperature;

[0087] It should be noted that at the end of heating or the initial defrosting phase of the air conditioner, the air conditioner's compressor shuts down, causing the indoor heat exchanger temperature to drop rapidly. If the air deflector is not closed at this time, cold air will be blown onto people. Closing the air deflector directly will result in insufficient utilization of the heat exchanger's residual heat, and the sudden cessation of heating will cause the outlet air temperature to fluctuate dramatically, resulting in significant temperature fluctuations and discomfort. Considering that temperature fluctuations caused by closing the air deflector at different ambient temperatures have different effects on the perceived temperature of the human body, in this embodiment, the ambient temperature is the initial indoor ambient temperature after receiving the command to enter defrost mode.

[0088] Step S30: determining a closing rate of the air deflector according to the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate;

[0089] Optionally, obtaining the current actual angle of the air deflector;

[0090] It is understandable that before entering the defrost mode, the air conditioner is generally in the heating mode, so the current actual angle of the air guide plate is generally the angle at which the heating mode is turned on.

[0091] determining a target time required for the air deflector to rotate from the actual angle to the closed angle according to the ambient temperature, wherein the lower the ambient temperature, the shorter the target time required for the air deflector to rotate from the actual angle to the closed angle;

[0092] Optionally, when the ambient temperature is greater than the third preset ambient temperature, the first target time t1 is determined; when the ambient temperature is greater than or equal to the first preset ambient temperature and less than the third preset ambient temperature, the second target time t2 is determined; when the ambient temperature is greater than or equal to the second preset ambient temperature and less than the first preset ambient temperature, the third target time t3 is determined; when the ambient temperature is less than the second preset ambient temperature, the fourth target time t4 is determined.

[0093] Optionally, the first preset ambient temperature may be 19-20 degrees Celsius, the second preset ambient temperature may be 13-15 degrees Celsius, and the third preset ambient temperature may be 21-22 degrees Celsius, i.e., the second preset ambient temperature, the first preset ambient temperature, and the third preset ambient temperature, in descending order. The first target time t1 may be within a range of 40-60 seconds, the second target time t2 may be within a range of 90-120 seconds, the third target time t3 may be within a range of 120-150 seconds, and the fourth target time t4 may be within a range of 180-210 seconds.

[0094] determining a closing rate of the air deflector according to the actual angle, the closing angle, and the time;

[0095] Specifically, refer to Figure 6 , Figure 6 The figure is a schematic diagram of the structure of the air deflector in an embodiment of an air conditioner of the present invention. The air conditioner 200 is provided with an air deflector 201. The target angle between the actual angle and the closing angle of the air deflector 201 is calculated, and the closing rate of the air deflector 201 is determined according to a preset formula, the target angle, and the target time. The preset formula is V(f) = α / t, wherein V(f) is the closing rate of the air deflector 201, α is the target angle between the actual angle and the closing angle, and t is the target time required for the air deflector 201 to rotate from the actual angle to the closing angle. For example, when the ambient temperature is greater than the third preset ambient temperature, the closing rate of the air deflector 201 is determined according to the first formula, the target angle, and the first target time. The preset formula is V(f) = α / t1, wherein V(f) is the closing rate of the air deflector 201, α is the target angle between the actual angle and the closing angle, and t1 is the first target time.

[0096] The air guide plate 201 is adjusted to close at the closing rate.

[0097] Step S40, controlling the air deflector to close at the closing rate;

[0098] Step S50: After the air guide plate is closed, the compressor is turned on and defrosting is performed.

[0099] Optionally, when the air guide plate is closed, determining whether the fan stops running;

[0100] When the fan stops running, the compressor is turned on and defrost is performed at a preset frequency.

[0101] The preset frequency can be pre-set as the rated heating frequency of the compressor. In one embodiment, when the air guide plate is closed and the fan stops running, the compressor is turned on to defrost, thereby preventing the air conditioner fan from blowing cold air towards people, thereby improving the accuracy of preventing cold wind.

[0102] Optionally, refer to Figure 7 , Figure 7 The figure shows the structure of two air deflectors in an embodiment of an air conditioner according to the present invention. In one embodiment, the air deflectors of the air conditioner 300 include a first air deflector 301 and a second air deflector 302. The first air deflector 301 is a large air deflector, and the second air deflector 302 is a small air deflector. Step S30 includes determining the corresponding closing rates of the first air deflector 301 and the second air deflector 302 based on the ambient temperature, and controlling the first air deflector 301 and the second air deflector 302 to close at the corresponding closing rates.

[0103] Specifically, when the ambient temperature is greater than a third preset ambient temperature, the first and second closing rates of the first and second air deflectors 301, 302 are determined based on the ambient temperature, respectively. The first air deflector 301 is controlled to close at the first closing rate, and the second air deflector 302 is controlled to close at the second closing rate. The first closing rate is lower than the second closing rate, meaning that the large air deflector closes later than the small air deflector. This allows the air conditioner to still dissipate some excess heat even when the ambient temperature is high.

[0104] When the ambient temperature is lower than the second preset ambient temperature, a third closing rate is determined for each of the first and second air deflectors 301, 302 based on the ambient temperature. The first and second air deflectors 301, 302 are controlled to close simultaneously at the third closing rate, which is higher than the second closing rate. In other words, the large and small air deflectors close simultaneously at a higher closing rate. This prevents people from being blown by cold air from the air conditioner by controlling the large and small air deflectors to close simultaneously at a higher closing rate when the ambient temperature is low.

[0105] In the technical solution provided by the above embodiment, when the air conditioner shuts down the compressor in the early stages of defrosting, it obtains the current indoor ambient temperature and determines the closing rate of the air deflector based on this ambient temperature, wherein the lower the ambient temperature, the higher the closing rate; the air deflector is then controlled to close at this closing rate. In this way, when the indoor ambient temperature is higher, the air conditioner slowly closes the air deflector, allowing the air conditioner to fully utilize the waste heat from the heat exchanger for heating. When the indoor ambient temperature is lower, the air deflector quickly closes to prevent cold air from blowing in. By flexibly controlling the closing rate of the air deflector at different ambient temperatures, the air deflector achieves the effect of preventing cold air from blowing in during the initial stage of defrosting, when waste heat is blown out.

[0106] Reference Figure 3 , Figure 3 This is a second embodiment of the air conditioner defrost prevention cold wind control method of the present invention, based on the first embodiment, and after step S10, further comprising:

[0107] Step S60: obtaining the operating temperature of the indoor heat exchanger of the air conditioner;

[0108] Since the air conditioner is currently in the initial defrosting stage, the compressor has stopped and the operating temperature of the indoor heat exchanger will gradually drop.

[0109] Step S70: When the operating temperature meets a preset condition, reducing the speed of the indoor fan of the air conditioner;

[0110] Determine whether the operating temperature meets the preset conditions. Optionally, determine whether the operating temperature is less than or equal to the preset temperature value corresponding to the current speed of the indoor fan. When the operating temperature is less than or equal to the preset temperature value corresponding to the current speed of the indoor fan, reduce the speed of the indoor fan.

[0111] It is understood that the fan is pre-divided into multiple wind speed levels from the rated maximum speed to zero, with different wind speed levels corresponding to different fan speeds. In one embodiment, it is determined whether the operating temperature is less than or equal to a preset temperature value corresponding to the current fan speed. If the operating temperature is less than or equal to the preset temperature value corresponding to the current indoor fan speed, the speed of the indoor fan is reduced by one level.

[0112] In order to improve the air conditioner's cold wind protection effect, the air conditioner obtains the operating temperature of the indoor unit heat exchanger in real time or periodically, and adjusts the fan speed according to the operating temperature. The lower the operating temperature, the lower the fan speed.

[0113] Step S80: Return to the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner until the fan stops running.

[0114] In order to more accurately obtain the operating temperature of the indoor heat exchanger, optionally, the operating time of the indoor fan at the current fan speed is obtained;

[0115] When the operating time is greater than the first preset time, the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner is returned to execution until the fan stops running.

[0116] The first preset time duration may be 20-30 seconds, so the maximum speed may be the rated speed or the maximum speed that the fan can handle. After the indoor fan speed is adjusted, if the operating time exceeds the first preset time duration, the current operating temperature of the indoor heat exchanger is obtained again. If the operating temperature meets the preset condition, the fan speed is reduced until the fan stops.

[0117] In the technical solution provided by this embodiment, the air conditioner obtains the operating temperature of the indoor heat exchanger and, when the operating temperature meets a preset condition, reduces the speed of the indoor fan. When the fan has been operating at the current fan speed for more than a first preset time, the air conditioner returns to the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner until the fan stops operating. This allows the air conditioner to operate at a higher fan speed when the heat exchanger temperature is high to blow away excess heat from the air conditioner. When the operating temperature of the indoor heat exchanger of the air conditioner decreases, the fan speed is correspondingly reduced until the air conditioner stops, thereby reducing the output of cold air and improving the accuracy of cold wind prevention control.

[0118] Reference Figure 4 , Figure 4 This is a third embodiment of the air conditioner defrost prevention cold wind control method of the present invention, based on the first or second embodiment, the preset condition is that the operating temperature is less than or equal to the reference temperature corresponding to the current fan speed; step S70 includes:

[0119] Step S71, determining a temperature compensation coefficient according to the ambient temperature and a preset ambient temperature;

[0120] The ambient temperature is the initial temperature of the indoor environment in which the air conditioner is located after the air conditioner receives the instruction to enter the defrost mode. The preset ambient temperature includes a first preset ambient temperature, a second preset ambient temperature and a third preset ambient temperature. The first preset ambient temperature can be 19-20 degrees, the second preset ambient temperature can be 13-15 degrees, and the third preset ambient temperature can be 21-22 degrees, that is, from small to large, they are the second preset ambient temperature, the first preset ambient temperature and the third preset ambient temperature. The temperature compensation coefficient can be a human body temperature compensation coefficient. Optionally, when the ambient temperature is greater than or equal to the third ambient temperature, a first temperature compensation value is determined; when the ambient temperature is greater than or equal to the first preset ambient temperature and less than the third preset ambient temperature, a second temperature compensation value is determined; when the ambient temperature is greater than or equal to the second preset ambient temperature and less than the first preset ambient temperature, a third temperature compensation value is determined; when the ambient temperature is less than the second preset ambient temperature, a fourth temperature compensation value is determined.

[0121] Step S72: determining a temperature compensation value according to the ambient temperature, a preset ambient temperature, and a temperature compensation coefficient;

[0122] Optionally, when the ambient temperature is greater than or equal to a third preset ambient temperature, a first temperature compensation value is determined according to a first formula, the ambient temperature, the preset ambient temperature, and a first temperature compensation coefficient, wherein the first formula is ΔT1=(T10-T13)K1, wherein ΔT1 is the first temperature compensation value, T10 is the ambient temperature, T13 is the third preset ambient temperature, and K1 is the first temperature compensation coefficient. When the ambient temperature is greater than or equal to the first preset ambient temperature and less than the third preset ambient temperature, a second temperature compensation value is determined according to a second formula, the ambient temperature, the preset ambient temperature, and a second temperature compensation coefficient, wherein the second formula is ΔT2=(T13-T10)K2, wherein ΔT2 is the second temperature compensation value, T10 is the ambient temperature, T13 is the third preset ambient temperature, and K2 is the second temperature compensation coefficient. When the ambient temperature is greater than or equal to the second preset ambient temperature and less than the first preset ambient temperature, a third temperature compensation value is determined according to a third formula, the ambient temperature, the preset ambient temperature, and a third temperature compensation coefficient. The third formula is ΔT3 = (T11 - T10) K3, where ΔT3 is the third temperature compensation value, T10 is the ambient temperature, T11 is the first preset ambient temperature, and K3 is the third temperature compensation coefficient. When the ambient temperature is less than the second preset ambient temperature, a fourth temperature compensation value is determined according to a fourth formula, the ambient temperature, the preset ambient temperature, and a fourth temperature compensation coefficient. The fourth formula is ΔT4 = 4*K4, where ΔT4 is the fourth temperature compensation value, and K4 is the fourth temperature compensation coefficient.

[0123] It can be understood that the preset ambient temperature can be set to multiple, so that multiple temperature compensation coefficients can be set corresponding to different ambient temperatures, thereby determining multiple temperature compensation values, and then dividing the fan speed into more wind speed gears to achieve more precise control of the air conditioner's cold wind protection.

[0124] Step S73: determining reference temperatures corresponding to fan speeds of the air conditioner according to the preset temperature of the heat exchanger and the temperature compensation value.

[0125] The preset heat exchanger temperature is the initial heat exchanger temperature corresponding to various fan speeds, determined through multiple tests. This is the theoretical temperature the indoor heat exchanger should reach when the fan is adjusted to a certain speed. The reference temperature is equal to the preset heat exchanger temperature minus the temperature compensation value. Optionally, the air conditioner can have multiple fan speed settings, with different fan speed settings corresponding to different reference temperatures.

[0126] It is understandable that, in one embodiment, the step S70 includes: step S74, when the operating temperature is less than or equal to the reference temperature corresponding to the current fan speed, reducing the speed of the indoor fan of the air conditioner. For example, when the operating temperature of the heat exchanger is greater than the reference temperature corresponding to the maximum fan speed, the fan is controlled to operate at a high fan speed. When the fan runs at the maximum fan speed for a time longer than a first preset time, the current operating temperature of the heat exchanger is obtained, and when the operating temperature is less than or equal to the first reference temperature corresponding to the maximum fan speed, the fan speed is reduced. Specifically, the fan is adjusted to operate at a second fan speed, and the second fan speed is lower than the first fan speed. As the temperature of the heat exchanger decreases, the above-mentioned steps of reducing the fan speed are performed in sequence until the fan stops running.

[0127] In the technical solution provided in this embodiment, a temperature compensation value is determined based on the ambient temperature and the preset ambient temperature, and a reference temperature value corresponding to each fan speed is determined based on the preset temperature value of the heat exchanger and the temperature compensation value. When the operating temperature of the heat exchanger is less than or equal to the reference temperature corresponding to the current fan speed, the fan speed is reduced until the fan stops running. In this way, taking into account the difference in human body temperature at different wind speeds and different initial ambient temperatures, the human body temperature compensation value at different ambient temperatures is added when setting the heat exchanger reference temperature corresponding to the fan speed, so as to more accurately set the reference temperature and thereby improve the accuracy of the cold wind prevention control. The fan speed is divided into multiple different gears, and the fan speed is increased according to the temperature of the heat exchanger, thereby improving the accuracy of the cold wind prevention control.

[0128] The embodiment of the present invention further provides an air conditioner, referring to Figure 5 , Figure 5 This is a schematic diagram of the internal modules of the air conditioner of the present invention. The air conditioner 200 includes:

[0129] A shut-down module 201 is configured to shut down the compressor upon receiving an instruction to enter the defrost mode;

[0130] Acquisition module 202, used to obtain the current ambient temperature;

[0131] a determination module 203 for determining a closing rate of the air deflector according to the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate;

[0132] A control module 204 is configured to control the air deflector to close at the closing rate;

[0133] The opening module 205 is used to open the compressor and perform defrosting after the air guide plate is closed.

[0134] The functional implementation of each module in the above-mentioned air conditioner corresponds to the various steps in the embodiment of the defrosting and cold wind prevention control method of the above-mentioned air conditioner, and their functions and implementation processes will not be repeated here one by one.

[0135] An embodiment of the present invention further provides a computer-readable storage medium storing an air conditioner defrost and cold wind prevention control program, which implements the above-mentioned method when executed by a processor.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational 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.

[0140] 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.

[0141] 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.

[0142] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for controlling defrosting and preventing cold wind in an air conditioner, characterized in that: The air conditioner defrosting and cold wind prevention control method: After receiving the instruction to enter the defrost mode, the compressor is turned off; Obtain the current ambient temperature, which is the initial indoor ambient temperature after receiving the instruction to enter the defrost mode; determining a closing rate of the air deflector according to the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate; controlling the air deflector to close at the closing rate; After the air guide plate is closed, the compressor is turned on and defrosting is performed.

2. The air conditioner defrosting and cold wind prevention control method according to claim 1, characterized in that: The step of determining the closing rate of the air deflector according to the ambient temperature includes: Get the current actual angle of the wind deflector; determining a target time required for the air deflector to rotate from the actual angle to the closed angle according to the ambient temperature, wherein the lower the ambient temperature, the shorter the target time required for the air deflector to rotate from the actual angle to the closed angle; determining a closing rate of the air deflector according to the actual angle, the closing angle, and the time; The air guide plate is adjusted to close at the closing rate.

3. The air conditioner defrosting and cold wind prevention control method according to claim 1, characterized in that: After the step of shutting down the compressor after receiving the instruction to enter the defrost mode, the method further includes: Obtaining the operating temperature of the indoor heat exchanger of the air conditioner; When the operating temperature meets a preset condition, reducing the speed of the indoor fan of the air conditioner; Return to the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner until the fan stops running.

4. The air conditioner defrosting and cold wind prevention control method according to claim 3, characterized in that: The preset condition is that the operating temperature is less than or equal to the reference temperature corresponding to the current fan speed; When the operating temperature meets a preset condition, the step of reducing the rotation speed of the indoor fan of the air conditioner includes: determining a temperature compensation coefficient according to the ambient temperature and a preset ambient temperature; Determining a temperature compensation value according to the ambient temperature, a preset ambient temperature, and a temperature compensation coefficient; The reference temperatures corresponding to the speeds of the fans of the air conditioner are determined according to the preset temperature of the heat exchanger and the temperature compensation value.

5. The air conditioner defrosting and cold wind prevention control method according to claim 3, characterized in that: After the step of reducing the rotation speed of the indoor fan of the air conditioner, the method further comprises: Obtaining the running time of the indoor fan at the current fan speed; When the operating time is greater than the first preset time, the step of obtaining the operating temperature of the indoor heat exchanger of the air conditioner is returned to execution until the fan stops running.

6. The air conditioner defrosting and cold wind prevention control method according to claim 3, characterized in that: After the air guide plate is closed, the step of starting the compressor and performing defrosting comprises: When the air guide plate is closed, determining whether the fan stops running; When the fan stops running, the compressor is turned on and defrost is performed at a preset frequency.

7. The air conditioner defrosting and cold wind prevention control method according to claim 1, characterized in that: While the compressor is off, perform the following steps: Turn on the electric auxiliary heating element of the air conditioner.

8. An air conditioner, characterized in that: The air conditioner comprises: A shut-down module, used to shut down the compressor after receiving an instruction to enter the defrost mode; An acquisition module is used to acquire the current ambient temperature, where the ambient temperature is the initial ambient temperature of the room after receiving the instruction to enter the defrost mode; a determination module, configured to determine a closing rate of the air deflector according to the ambient temperature, wherein the lower the ambient temperature, the higher the closing rate; a control module, configured to control the air deflector to close at the closing rate; The opening module is used to open the compressor and perform defrosting after the air guide plate is closed.

9. An air conditioner, characterized in that: The air conditioner includes a memory, a processor, and an air conditioner defrosting and cold wind prevention control program stored in the memory and runnable on the processor. When the processor executes the air conditioner defrosting and cold wind prevention control program, the method described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that An air conditioner defrost and cold wind prevention control program is stored thereon, and when the air conditioner defrost and cold wind prevention control program is executed by the processor, the method according to any one of claims 1 to 7 is implemented.

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