Air conditioner and air conditioning control method thereof, and computer readable storage medium

Abstract

The present invention discloses an air conditioner control method, the method comprising: when the air conditioner starts the sterilization mode, controlling the indoor fan of the air conditioner to run at the lowest wind speed; in the process of the indoor fan running at the lowest wind speed, regulating the operating frequency of the compressor of the air conditioner according to the indoor heat exchanger temperature and the target sterilization temperature. The present invention also discloses an air conditioner and a computer-readable storage medium. The present invention aims to achieve rapid adjustment of the heat exchanger temperature, ensure the sterilization effect and ensure reliable operation of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning control method, an air conditioner and a computer-readable storage medium. Background Art

[0002] With the development of economy and technology, the functions of air conditioners are becoming more and more diversified. At present, many air conditioners have high-temperature sterilization function, which kills bacteria in the indoor unit by raising the temperature of the indoor heat exchanger to a certain temperature (such as 56°C).

[0003] At present, during the high-temperature sterilization process of air conditioners, the speed of the indoor fan is generally finely controlled to make the temperature reach the sterilization temperature. However, the adjustment range of the fine indoor fan speed control is small, and the response efficiency of the temperature change of the heat exchanger under the speed adjustment is slow, which can easily cause the heat exchanger temperature to be too high or too low. When the heat exchanger temperature is too high, it will cause the system to shut down and affect the reliable operation of the system. When the heat exchanger temperature is too low, it cannot effectively sterilize. It can be seen that the current high-temperature sterilization process of air conditioners has the problem of not being able to effectively balance the sterilization effect and the reliable operation of the system. Summary of the invention

[0004] The main purpose of the present invention is to provide an air conditioning control method, an air conditioner and a computer-readable storage medium, aiming to achieve rapid adjustment of the temperature of the heat exchanger, ensure the sterilization effect and the reliable operation of the system.

[0005] To achieve the above object, the present invention provides an air conditioning control method, which comprises the following steps:

[0006] When the air conditioner starts the sterilization mode, controlling the indoor fan of the air conditioner to run at the lowest wind speed;

[0007] When the indoor fan is running at the lowest wind speed, the operating frequency of the air conditioner compressor is regulated according to the indoor heat exchanger temperature and the target sterilization temperature.

[0008] Optionally, the step of regulating the operating frequency of the air conditioner compressor according to the indoor heat exchanger temperature and the target sterilization temperature includes:

[0009] When the temperature of the indoor heat exchanger is lower than the target sterilization temperature, controlling the compressor to increase the operating frequency;

[0010] When the temperature of the indoor heat exchanger is greater than the target sterilization temperature, the compressor is controlled to reduce the operating frequency.

[0011] Optionally, the step of controlling the compressor to reduce the operating frequency includes:

[0012] Determine the target frequency reduction parameter according to the first temperature difference; the first temperature difference is the temperature difference between the indoor heat exchanger temperature and the target sterilization temperature;

[0013] The operating frequency of the compressor is reduced according to the target frequency reduction parameter.

[0014] Optionally, the target frequency reduction parameter includes a frequency reduction period and / or a frequency reduction amplitude, and the step of determining the target frequency reduction parameter according to the first temperature difference includes:

[0015] Determine the frequency reduction period and / or the frequency reduction amplitude according to the first temperature difference;

[0016] The frequency reduction period tends to increase as the first temperature difference increases, and the frequency reduction amplitude tends to increase as the first temperature difference increases.

[0017] Optionally, the step of regulating the operating frequency of the air conditioner compressor according to the indoor heat exchanger temperature and the target sterilization temperature further includes:

[0018] When the indoor heat exchanger temperature is greater than the target sterilization temperature, determining a second temperature difference between the indoor heat exchanger temperature and the target sterilization temperature;

[0019] If the second temperature difference is greater than or equal to the set temperature difference threshold, executing the step of controlling the compressor to reduce the operating frequency;

[0020] If the second temperature difference is less than the set temperature difference threshold, the compressor is controlled to maintain operating at the current frequency.

[0021] Optionally, the step of regulating the operating frequency of the air conditioner compressor according to the indoor heat exchanger temperature and the target sterilization temperature includes:

[0022] Obtaining the duration of the sterilization mode operation;

[0023] If the duration is less than the preset duration, the operating frequency of the compressor is regulated according to the indoor heat exchanger temperature and the target sterilization temperature within a frequency range less than or equal to the first frequency;

[0024] The first frequency is a parameter determined according to the rotation speed of the indoor fan.

[0025] Optionally, after the step of obtaining the duration of the sterilization mode operation, the method further includes:

[0026] If the duration is greater than or equal to the preset duration, then within a frequency range less than or equal to the second frequency, the operating frequency of the compressor is regulated according to the indoor heat exchanger temperature and the target sterilization temperature;

[0027] The second frequency is a parameter determined according to the outdoor ambient temperature, and the first frequency is less than the second frequency.

[0028] Optionally, the air conditioner includes a shell, the shell is provided with at least a first air outlet and a second air outlet, the indoor fan includes a first sub-fan and a second sub-fan, the first sub-fan is arranged corresponding to the first air outlet, and the second sub-fan is arranged corresponding to the second air outlet, and the step of controlling the indoor fan of the air conditioner to operate at the lowest wind speed includes:

[0029] The first sub-blower is controlled to operate at the lowest wind speed, and the second sub-blower is controlled to be turned off.

[0030] Optionally, the distance between the first sub-air outlet and the object of action of the air conditioner is defined as a first distance, and the distance between the second sub-air outlet and the object of action of the air conditioner is defined as a second distance, and the first distance is greater than the second distance.

[0031] Optionally, after the step of controlling the first sub-blower to operate at the lowest wind speed and controlling the second sub-blower to shut down, the step further includes:

[0032] Controlling the second sub-blower to start and controlling the compressor to maintain the current frequency operation;

[0033] When the on time of the second sub-blower is less than the set time, controlling the first sub-blower to remain on;

[0034] When the on time of the second sub-blower is greater than or equal to the set time, the first sub-blower is controlled to be turned off.

[0035] In addition, in order to achieve the above-mentioned purpose, the present application also proposes an air conditioner, which includes: a memory, a processor, and an air conditioning control program stored in the memory and executable on the processor, and when the air conditioning control program is executed by the processor, the steps of the air conditioning control method described in the above item are implemented.

[0036] In addition, in order to achieve the above-mentioned purpose, the present application also proposes a computer-readable storage medium, on which an air-conditioning control program is stored. When the air-conditioning control program is executed by a processor, the steps of the air-conditioning control method as described in any one of the above items are implemented.

[0037] The present invention proposes an air conditioning control method, which controls the indoor fan to run at the lowest wind speed when the sterilization mode is started. When the indoor fan runs at the lowest wind speed, the frequency of the compressor is adjusted based on the indoor heat exchanger temperature and the target sterilization temperature. There is no need to adjust the speed during high-temperature sterilization. Under the coordinated adjustment of the lowest wind speed and the compressor frequency, the temperature change of the heat exchanger can respond quickly, and the temperature of the indoor heat exchanger can be ensured to be stable above the sterilization temperature without being too high. The system will not shut down for protection while effectively sterilizing, thereby achieving the effect of ensuring the sterilization effect while ensuring the reliable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the hardware structure involved in the operation of an air conditioner according to an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of a flow chart of an embodiment of an air conditioning control method of the present invention;

[0040] Figure 3 A schematic diagram of a flow chart of another embodiment of an air conditioning control method of the present invention;

[0041] Figure 4 This is a flow chart of another embodiment of the air conditioning control method of the present invention.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0044] The main solution of the embodiment of the present invention is: when the air conditioner starts the sterilization mode, the indoor fan of the air conditioner is controlled to run at the lowest wind speed; when the indoor fan is running at the lowest wind speed, the operating frequency of the air conditioner compressor is adjusted according to the indoor heat exchanger temperature and the target sterilization temperature.

[0045] In the prior art, the speed of the indoor fan is generally finely controlled during the high-temperature sterilization process of the air conditioner to make the temperature reach the sterilization temperature. However, the fine adjustment range of the indoor fan speed control is small, and the response efficiency of the temperature change of the heat exchanger under the speed adjustment is slow, which can easily lead to the heat exchanger temperature being too high or too low. When the heat exchanger temperature is too high, it will cause the system to shut down and affect the reliable operation of the system. When the heat exchanger temperature is too low, it cannot effectively sterilize. It can be seen that the current high-temperature sterilization process of the air conditioner has the problem of not being able to effectively balance the sterilization effect and the reliable operation of the system.

[0046] The present invention provides the above-mentioned solution, aiming to realize rapid adjustment of the temperature of the heat exchanger, ensuring the sterilization effect while ensuring reliable operation of the system.

[0047] The embodiment of the present invention provides an air conditioner, which may be a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling air conditioner, a mobile air conditioner, etc.

[0048] In an embodiment of the present invention, the air conditioner includes a refrigerant circulation loop and a fan.

[0049] The refrigerant circulation loop includes an indoor heat exchanger, an outdoor heat exchanger, a compressor 1, and a throttling device connected by pipelines. Based on this, when the air conditioner is in heating operation, the refrigerant flowing out of the compressor 1 passes through the indoor heat exchanger, the throttling device, and the outdoor heat exchanger in sequence and then flows back to the compressor 1; when the air conditioner is in cooling operation, the refrigerant flowing out of the compressor 1 passes through the outdoor heat exchanger, the throttling device, and the indoor heat exchanger in sequence and then flows back to the compressor 1. In this embodiment, the air conditioner is in heating operation in the sterilization mode.

[0050] The fan includes an indoor fan 2 and an outdoor fan 3. The indoor fan 2 is arranged corresponding to the indoor heat exchanger, and the outdoor fan 3 is arranged corresponding to the outdoor heat exchanger. In this embodiment, the motor in the indoor fan 2 is an AC motor (such as an asynchronous motor).

[0051] Furthermore, the air conditioner also includes a temperature detection module 4, which is specifically used to detect the temperature of the heat exchanger. The temperature detection module 4 can be specifically arranged on the coil of the indoor heat exchanger. Specifically, the number of the temperature detection module 4 can be one or more. When the number of the temperature detection module 4 is one, it can be arranged in the middle of the coil of the indoor heat exchanger. When the number of the temperature detection module 4 is multiple, in addition to the middle of the coil of the indoor heat exchanger, the temperature detection module 4 can also be arranged at the refrigerant inlet and refrigerant outlet of the indoor heat exchanger coil.

[0052] Furthermore, the air conditioner also includes a shell, and the indoor heat exchanger is arranged in the shell. The shell is provided with at least a first air outlet and a second air outlet, and the indoor fan 2 includes a first sub-fan and a second sub-fan, the first sub-fan is arranged corresponding to the first air outlet, and the second sub-fan corresponds to the second air outlet. An air duct is arranged in the shell, and the indoor heat exchanger is arranged in the air duct. When the indoor fan 2 is started, the indoor air is driven to enter the air duct, and after being regulated by the indoor heat exchanger, it is sent into the room from the first air outlet and / or the second air outlet. Among them, when the first sub-fan is started, the air regulated by the indoor heat exchanger is driven to be sent into the room from the first air outlet; when the second sub-fan is started, the air regulated by the indoor heat exchanger is driven to be sent into the room from the second air outlet.

[0053] It should be noted that the first air outlet and the second air outlet in this embodiment are arranged in a horizontally spaced distribution. In other embodiments, the first air outlet and the second air outlet may also be arranged in a vertically spaced distribution.

[0054] Reference Figure 1 In addition to the indoor fan 2, the outdoor fan 3, the compressor 1 and the temperature detection module 4, the air conditioner also includes a control device, and the indoor fan 2, the outdoor fan 3, the compressor 1 and the temperature detection module 4 are all connected to the control device here. The control device can be used to obtain the operating parameters of the indoor fan 2 and the compressor 1, and can also be used to control the operation of the indoor fan 2 and the compressor 1. In addition, the control device can also be used to obtain the temperature data detected by the temperature detection module 4.

[0055] In the embodiment of the present invention, refer to Figure 1 The control device includes: a processor 1001 (such as a CPU), a memory 1002, a timer 1003, etc. The memory 1002 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 can also be a storage device independent of the aforementioned processor 1001. The processor 1001, the memory 1002 and the timer 1003 are all connected via a communication bus. The timer 1003 can be used to calculate the duration data involved in the following air conditioning control method.

[0056] Those skilled in the art will understand that Figure 1 The device structure shown in the figure does not constitute a limitation of the device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0057] like Figure 1 As shown, the memory 1002 as a computer-readable storage medium may include an air conditioning control program. Figure 1 In the device shown, the processor 1001 can be used to call the air conditioning control program stored in the memory 1002 and execute the relevant steps of the air conditioning control method in the following embodiments.

[0058] The embodiment of the present invention further provides an air conditioning control method, which is applied to control the above air conditioner.

[0059] Reference Figure 2 , an embodiment of the air conditioning control method of the present application is proposed. In this embodiment, the air conditioning control method includes:

[0060] Step S10, when the air conditioner starts the sterilization mode, controlling the indoor fan of the air conditioner to run at the lowest wind speed;

[0061] The sterilization mode is specifically an air conditioner operation mode for the purpose of sterilizing the indoor unit. The sterilization mode can be turned on when the air conditioner receives a setting instruction input by the user, or when the operating state parameters of the air conditioner are monitored to meet the preset conditions (for example, the continuous use time reaches a preset time or more, or when the bacteria in the indoor unit are detected to reach a preset concentration or more, etc.), or when the air conditioner's self-cleaning mode defrost ends, etc. In the sterilization mode, the air conditioner is running for heating, and the indoor heat exchanger is in a heat release state.

[0062] Specifically, the indoor fan may have at least two windshields. The lowest windshield is the windshield with the lowest fan speed among the at least two windshields. The indoor fan may operate at a fixed speed in the lowest windshield, or may operate at multiple speeds in the lowest windshield, as long as the speed of the indoor fan does not exceed the lowest windshield.

[0063] The maximum value of the lowest windshield can be set according to actual needs. In this embodiment, the maximum speed of the lowest windshield is less than or equal to 30% of the maximum speed value allowed for the fan to run. For example, 15% of the maximum speed allowed for the fan to run is the maximum critical value of the lowest windshield. Based on this, when the sterilization mode is started, the indoor fan can be controlled to run at a speed of 1%.

[0064] In the sterilization mode, the indoor fan can be maintained at the lowest wind speed until the sterilization mode is exited.

[0065] Step S20, in the process of the indoor fan running at the lowest wind speed, the operating frequency of the air conditioner compressor is regulated according to the indoor heat exchanger temperature and the target sterilization temperature. In the process of the indoor fan running at the lowest wind speed, the indoor heat exchanger temperature can be detected in real time or at intervals of set duration. Specifically, the indoor heat exchanger temperature can be obtained by obtaining the detection data of the temperature detection module set on the coil of the indoor heat exchanger. Among them, if the number of temperature detection modules is more than one, the average of the multiple coil temperatures obtained can be used as the indoor heat exchanger temperature, the lowest temperature among the multiple coil temperatures can be used as the indoor heat exchanger temperature, and the multiple coil temperatures can be weighted averaged according to the weights corresponding to their detection positions (for example, the weight of the coil refrigerant outlet is greater than the weight of the middle of the coil, the weight of the middle of the coil is greater than the weight of the coil refrigerant inlet, etc.) The result is used as the indoor heat exchanger temperature.

[0066] While the indoor fan is maintaining the lowest wind speed, the operating frequency of the compressor is regulated based on the detected indoor heat exchanger temperature and the target sterilization temperature.

[0067] The target sterilization temperature is specifically the minimum heat exchanger temperature required for the air conditioner to achieve effective sterilization of the indoor unit. In this embodiment, the target sterilization temperature is 56°C. In other embodiments, the target sterilization temperature can also be set to other temperature values ​​according to actual needs, such as 60°C, 65°C, 70°C, 75°C, etc. The target sterilization temperature can be a fixed temperature pre-set in the system, or it can be a temperature obtained based on the current operating conditions of the system. For example, in order to ensure the accuracy of the target sterilization temperature obtained, the temperature and / or air pressure of the current environment of the air conditioner can be obtained, and the target sterilization temperature can be obtained based on the ambient temperature and / or ambient air pressure, so as to ensure that the air conditioner regulates the compressor based on the target sterilization temperature under the current operating conditions, thereby ensuring effective sterilization of the indoor unit.

[0068] The compressor frequency control method specifically includes maintaining the current operating frequency unchanged, increasing the operating frequency or decreasing the operating frequency. When the operating frequency needs to be increased or decreased, the frequency adjustment parameter can be a pre-set parameter or a parameter determined based on the indoor heat exchanger temperature and the target sterilization temperature, the actual speed of the fan, etc.

[0069] Different indoor heat exchanger temperatures and different target sterilization temperatures correspond to different compressor frequency control methods. Specifically, the correspondence between the target sterilization temperature, the indoor heat exchanger temperature and the frequency control parameters can be established in advance. The correspondence may be a direct correspondence between the target sterilization temperature, the indoor heat exchanger temperature and the frequency control parameters. For example, when the target sterilization temperature is constant, the indoor heat exchanger temperature can be divided into different temperature intervals, and mapping relationships between different temperature intervals and different frequency control parameters can be established; under different target sterilization temperatures, there may be different mapping relationships between the temperature intervals and the frequency control parameters. Based on this, the mapping relationship between the indoor heat exchanger temperature and the frequency adjustment parameters is obtained based on the target sterilization temperature, and based on the obtained mapping relationship, the temperature interval in which the current indoor ambient temperature is located is determined, and the frequency control parameters associated with the temperature interval are used as the control parameters of the current compressor operating frequency.

[0070] In addition, the corresponding relationship can also be a corresponding relationship between temperature relationship parameters and frequency control parameters. The temperature relationship parameters are determined based on the target sterilization temperature and the indoor heat exchanger temperature. For example, the temperature difference between the target sterilization temperature and the indoor heat exchanger temperature, the ratio of the target sterilization temperature to the indoor heat exchanger temperature, etc. can be used as temperature relationship parameters, and different temperature relationship parameters are mapped with different frequency control parameters. Based on this, by determining the temperature relationship parameters such as the temperature difference or ratio between the target sterilization temperature and the indoor heat exchanger temperature, the corresponding frequency control parameters can be obtained based on the mapping relationship as the frequency control parameters of the current outdoor unit.

[0071] The frequency of the compressor is controlled to limit the actual temperature of the indoor heat exchanger to a target temperature range corresponding to the target sterilization temperature, the minimum temperature in the target temperature range is greater than or equal to the target sterilization temperature, and the maximum temperature in the target temperature range is less than or equal to the maximum temperature of the indoor heat exchanger allowed for reliable operation of the air conditioner.

[0072] An air conditioning control method proposed in an embodiment of the present invention controls the indoor fan to run at the lowest wind speed when the sterilization mode is started. When the indoor fan runs at the lowest wind speed, the frequency of the compressor is adjusted based on the indoor heat exchanger temperature and the target sterilization temperature. No speed adjustment is required during high-temperature sterilization. Under the coordinated adjustment of the lowest wind speed and the compressor frequency, the temperature change of the heat exchanger can respond quickly, and the temperature of the indoor heat exchanger can be ensured to be stable above the sterilization temperature while not being too high. The system will not shut down for protection while effectively sterilizing, thereby achieving the effect of ensuring the sterilization effect while the system is operating reliably. In particular, when the motor in the indoor fan is an AC motor such as an asynchronous motor, the problem that the coil temperature of the heat exchanger is difficult to stabilize above the sterilization temperature due to unstable AC power can be effectively avoided, and the sterilization effect of the indoor unit can be effectively improved.

[0073] Further, based on the above embodiment, another embodiment of the air conditioning control method of the present application is proposed. In this embodiment, referring to Figure 3 In step S20, the process of regulating the operating frequency of the compressor based on the indoor heat exchanger temperature and the target sterilization temperature is as follows:

[0074] Step S21, when the temperature of the indoor heat exchanger is lower than the target sterilization temperature, controlling the compressor to increase the operating frequency;

[0075] The compressor can perform frequency up-conversion according to the pre-set frequency up-conversion parameters or the frequency up-conversion parameters determined based on the actual operation of the air conditioner. The frequency up-conversion parameters can specifically include frequency up-conversion amplitude, frequency up-conversion rate, etc. For example, the compressor can perform frequency up-conversion once according to the frequency up-conversion amplitude, or can perform frequency up-conversion continuously according to the frequency up-conversion rate.

[0076] The frequency increase amplitude or frequency increase rate can be determined according to the indoor heat exchanger temperature and the target sterilization temperature. Specifically, the temperature deviation between the indoor heat exchanger temperature and the target sterilization temperature can be determined, and the frequency increase amplitude or frequency increase rate can be determined based on the temperature deviation. The larger the temperature deviation, the larger the frequency increase amplitude; the larger the temperature deviation, the larger the frequency increase rate. In addition, the ratio between the indoor heat exchanger temperature and the target sterilization temperature can also be determined, and the frequency increase amplitude or frequency increase rate can be determined based on the ratio. The larger the ratio, the larger the frequency increase amplitude; the larger the ratio, the larger the frequency increase rate. The frequency increase parameter determined based on the indoor heat exchanger temperature and the target sterilization temperature can be directly used as a control parameter of the compressor frequency increase process. In addition, when the indoor fan is running at a variable speed at the lowest windshield, the actual speed of the indoor fan can be obtained, and the first correction parameter of the frequency increase parameter can be obtained based on the actual speed. The parameter obtained after correcting the frequency increase parameter based on the first correction parameter is used as the control parameter of the compressor frequency increase process. Furthermore, in order to ensure the temperature comfort of the indoor environment during the sterilization process, the indoor temperature deviation between the current indoor environment temperature and the air conditioner set temperature can be obtained, and the second correction parameter of the up-frequency parameter can be determined based on the indoor temperature deviation. The up-frequency parameter is corrected based on the first correction parameter and the second correction parameter to obtain the parameter obtained as the control parameter of the compressor up-frequency process.

[0077] During the frequency increase of the compressor, if the frequency increase is completed according to the frequency increase amplitude or the frequency increase is continued at a certain frequency increase rate, the step of obtaining the indoor heat exchanger temperature can be returned to execute, and the compressor can be further regulated based on the obtained indoor heat exchanger temperature.

[0078] Here, when the temperature of the indoor heat exchanger is lower than the target sterilization temperature, the frequency of the compressor operation is increased on the basis of the fan operating at the lowest wind speed, so that the frequency of the indoor heat exchanger can be quickly increased to above the target sterilization temperature, thereby ensuring the sterilization effect of the indoor unit.

[0079] Step S22: When the temperature of the indoor heat exchanger is greater than the target sterilization temperature, the compressor is controlled to reduce the operating frequency.

[0080] The compressor can be reduced in frequency according to the pre-set frequency reduction parameters or the frequency reduction parameters determined based on the actual operation of the air conditioner. The frequency reduction parameters may specifically include the frequency reduction amplitude, frequency reduction rate or frequency reduction cycle. For example, the compressor can be reduced in frequency once according to the frequency reduction amplitude, or it can be continuously reduced in frequency according to the frequency reduction rate. The compressor can also repeatedly reduce the compressor frequency according to the frequency reduction cycle. The frequency reduction cycle here specifically refers to the interval between two adjacent frequency reduction actions in the process of repeatedly reducing the compressor frequency.

[0081] The target frequency reduction parameters such as the frequency reduction amplitude, frequency reduction rate or frequency reduction period can be determined according to the indoor heat exchanger temperature and the target sterilization temperature. For example, the target frequency reduction parameters can be determined based on the temperature deviation or ratio between the indoor heat exchanger temperature and the target sterilization temperature.

[0082] In one embodiment, the ratio between the indoor heat exchanger temperature and the target sterilization temperature can also be determined, and the frequency reduction amplitude or frequency reduction rate can be determined based on the ratio. The larger the ratio, the larger the frequency reduction amplitude; the larger the ratio, the larger the frequency reduction rate; the larger the ratio, the shorter the frequency reduction period.

[0083] In another way, a first temperature difference between the indoor heat exchanger temperature and the target sterilization temperature can be determined, and a target frequency reduction parameter can be determined according to the first temperature difference; the first temperature difference is the temperature difference between the indoor heat exchanger temperature and the target sterilization temperature; and the operating frequency of the compressor is reduced according to the target frequency reduction parameter. The first temperature difference is specifically the absolute value of the difference between the target sterilization temperature and the indoor heat exchanger temperature. Different first temperature differences correspond to different values ​​of the target frequency reduction parameter. The larger the first temperature difference, the greater the frequency reduction amplitude; the larger the first temperature difference, the greater the frequency reduction rate.

[0084] Specifically, in this embodiment, the target frequency reduction parameters include a frequency reduction period and / or a frequency reduction amplitude, and the step of determining the target frequency reduction parameters according to the first temperature difference includes: determining the frequency reduction period and / or the frequency reduction amplitude according to the first temperature difference; the frequency reduction period tends to increase with the increase of the first temperature difference, and the frequency reduction amplitude tends to increase with the increase of the first temperature difference. Specifically, in the process of controlling the compressor to reduce the frequency multiple times according to the frequency reduction period, the frequency reduction amplitude of each frequency reduction can be the amplitude determined here based on the first temperature difference, or it can be a preset fixed amplitude; in the process of controlling the compressor to reduce the frequency according to the frequency reduction amplitude, it can be a single frequency reduction or multiple frequency reductions. In the process of multiple frequency reductions, the frequency reduction period can be the period determined here based on the first temperature difference, or it can be a preset fixed period.

[0085] Here, the frequency reduction parameters of the compressor are determined in combination with the indoor heat exchanger temperature and the target sterilization temperature, which can ensure that the temperature of the indoor heat exchanger can be quickly reduced when it is high, and will not cause high temperature protection shutdown, thereby ensuring that the air conditioner can operate reliably during the sterilization process.

[0086] Furthermore, the frequency reduction parameter determined based on the indoor heat exchanger temperature and the target sterilization temperature can be directly used as the control parameter of the compressor frequency reduction process. In addition, when the indoor fan is running at a variable speed at the lowest windshield, the actual speed of the indoor fan can be obtained, and the first correction parameter of the frequency reduction parameter can be obtained based on the actual speed. The parameter obtained after correcting the frequency reduction parameter based on the first correction parameter is used as the control parameter of the compressor frequency reduction process. Furthermore, in order to ensure the temperature comfort of the indoor environment during the sterilization process, the indoor temperature deviation between the current indoor environment temperature and the air conditioner set temperature can be obtained, and the second correction parameter of the frequency reduction parameter can be determined based on the indoor temperature deviation. The parameter obtained after correcting the frequency reduction parameter based on the first correction parameter and the second correction parameter is used as the control parameter of the compressor frequency reduction process.

[0087] During the frequency reduction process of the compressor, if the frequency reduction is completed according to the frequency reduction amplitude or the frequency reduction is continuously performed at a certain frequency reduction rate, the step of obtaining the indoor heat exchanger temperature can be returned to, and the compressor can be further regulated based on the obtained indoor heat exchanger temperature.

[0088] Here, when the temperature of the indoor heat exchanger is higher than the target sterilization temperature, the frequency of the compressor operation is reduced on the basis of the fan operating at the lowest wind speed, so that the frequency of the indoor heat exchanger can be quickly reduced to above the target sterilization temperature, thereby ensuring the sterilization effect of the indoor unit and ensuring the reliable operation of the air conditioner.

[0089] Furthermore, in this embodiment, step S20 also includes:

[0090] Step S201, when the indoor heat exchanger temperature is greater than the target sterilization temperature, determining a second temperature difference between the indoor heat exchanger temperature and the target sterilization temperature;

[0091] The second temperature difference is specifically an absolute value of the difference between the target sterilization temperature and the indoor heat exchanger temperature.

[0092] Step S202: if the second temperature difference is greater than or equal to the set temperature difference threshold, the step of controlling the compressor to reduce the operating frequency is performed;

[0093] Step S203: If the second temperature difference is less than the set temperature difference threshold, control the compressor to maintain the current frequency operation.

[0094] The set temperature difference threshold is the maximum value of the temperature difference between the actual temperature of the indoor heat exchanger and the target sterilization temperature that is allowed for reliable operation of the air conditioner. The set temperature difference threshold can be preset according to the air conditioner compressor capacity and / or current operating conditions (such as indoor ambient temperature and / or outdoor ambient temperature, etc.).

[0095] If the second temperature difference is greater than or equal to the set temperature difference threshold, it indicates that the current compressor is at risk of shutting down. At this time, the operating frequency of the compressor is reduced to ensure that the compressor does not shut down, and the indoor heat exchanger can have a high enough temperature to ensure the sterilization effect while ensuring the reliable operation of the air conditioner. If the second temperature difference is less than the set temperature difference threshold, it indicates that the current compressor is not at risk of shutting down. At this time, the compressor continues to run at the current frequency, and the temperature of the indoor heat exchanger can be maintained above the target sterilization temperature, ensuring the sterilization effect of the air conditioner and ensuring the reliable operation of the air conditioner.

[0096] The following is a specific example to illustrate the relevant scheme of the air conditioning control method of this embodiment, wherein the temperature of the indoor heat exchanger is defined as T2, the frequency of the compressor is defined as FR, and the target sterilization temperature is set to 56°C. Under different indoor heat exchanger temperatures, the frequency of the compressor can be adjusted in the following manners;

[0097] T2≥60℃, with a cycle of 5 seconds, FR is reduced to the current operating frequency*a

[0098] 57℃> T2 with a period of 40 seconds, FR increases by bHz;

[0099] 60℃> T2≥58℃ with a period of 40 seconds, FR decreases by cHz;

[0100] 58℃> T2≥57℃, FR keeps the current frequency unchanged.

[0101] Where a≤0.9, b≥1, c≥1.

[0102] Further, based on any of the above embodiments, another embodiment of the air conditioning control method of the present application is proposed. Figure 4 , the step S20 comprises:

[0103] Step S210, obtaining the duration of the sterilization mode operation;

[0104] The duration here specifically refers to the time started from entering the sterilization mode, and the timed duration is used as the duration here.

[0105] Step S220, determining whether the duration is less than a preset duration;

[0106] If the duration is less than the preset duration, step S230 is executed; if the duration is greater than or equal to the preset duration, step S240 is executed.

[0107] The preset duration can be specifically set according to the reliable operation requirements of the system. In this embodiment, the preset duration is 3 minutes. In other embodiments, the preset duration can also be set shorter or longer according to actual conditions, such as 5 minutes, 7 minutes, 2 minutes, etc.

[0108] Step S230, regulating the operating frequency of the compressor of the air conditioner according to the indoor heat exchanger temperature and the target sterilization temperature within a frequency range less than or equal to a first frequency; the first frequency is a parameter determined by the rotation speed of the indoor fan;

[0109] Different indoor fan speeds may correspond to different first frequencies. The smaller the indoor fan speed, the smaller the first frequency. Specifically, the first frequency may be a frequency pre-associated with the lowest windshield, or a frequency determined based on the detected actual fan speed.

[0110] In this embodiment, the first frequency corresponding to the lowest windshield is 40 Hz. In other embodiments, the first frequency corresponding to the lowest windshield can also be set to other values ​​according to actual conditions, such as 50 Hz, 30 Hz, etc.

[0111] Here, in the process of regulating the frequency of the compressor based on the target sterilization temperature and the temperature of the indoor heat exchanger, whether the frequency is increased or decreased, the adjusted frequency must be guaranteed not to be greater than the first frequency. Specifically, the frequency regulation process of the compressor can be regulated according to the above steps S21 to S22 and steps S201 to S203, and it is only necessary to ensure that the adjusted frequency is not greater than the first frequency.

[0112] Step S240, within a frequency range less than or equal to a second frequency, regulating the operating frequency of the compressor of the air conditioner according to the indoor heat exchanger temperature and the target sterilization temperature; the second frequency is a parameter determined according to the outdoor ambient temperature, and the first frequency is less than the second frequency.

[0113] Different outdoor ambient temperatures may correspond to different second frequencies. The lower the outdoor ambient temperature, the smaller the second frequency. The correspondence between the outdoor ambient temperature and the second frequency may be preset, and the correspondence may be in the form of a calculation relationship, a mapping relationship, an algorithm model, etc. Based on the correspondence, the second frequency corresponding to the current outdoor ambient temperature may be determined.

[0114] Here, in the process of regulating the frequency of the compressor based on the target sterilization temperature and the temperature of the indoor heat exchanger, whether the frequency is increased or decreased, the adjusted frequency must be guaranteed not to be greater than the second frequency. Specifically, the frequency regulation process of the compressor can be regulated according to the above steps S21 to S22 and steps S201 to S203, and it is only necessary to ensure that the adjusted frequency is not greater than the second frequency.

[0115] Through the above steps, when the indoor fan is running at the lowest wind speed, the temperature of the indoor heat exchanger is relatively low in the initial stage (for example, when the air conditioner enters the sterilization mode from the off state or cooling mode, and when the air conditioner enters the sterilization mode after defrosting, etc.), the frequency of the compressor is limited based on the speed of the indoor fan, which is conducive to preventing the compressor frequency from increasing too quickly, causing the temperature of the indoor heat exchanger to rise too quickly, so that the system pressure cannot be buffered and affects reliability. Therefore, the first frequency limitation can ensure the reliable operation of the air conditioner in the initial stage of the sterilization mode. In the process of the indoor fan running at the lowest wind speed, in the later stage, when the system pressure tends to be stable, the frequency of the compressor is limited based on the outdoor ambient temperature, which is conducive to ensuring the reliable operation of the compressor during the sterilization process of the indoor unit under the current operating conditions.

[0116] It should be noted that, in other embodiments, if the duration is less than the preset duration, step S230 is executed; if the duration is greater than or equal to the preset duration, the second frequency may be determined by other means other than the outdoor ambient temperature or the frequency of the compressor may not be restricted. If the duration is greater than or equal to the preset duration, step S240 is executed; if the duration is less than the preset duration, the first frequency may be determined by other means other than the indoor fan speed or the frequency of the compressor may not be restricted.

[0117] Further, based on any of the above embodiments, another embodiment of the air conditioning control method of the present application is proposed. In this embodiment, the air conditioner includes a housing, the housing is provided with at least a first air outlet and a second air outlet, the indoor fan includes a first sub-fan and a second sub-fan, the first sub-fan is provided corresponding to the first air outlet, and the second sub-fan corresponds to the second air outlet. In step S10, the process of the indoor fan running at the lowest wind speed is specifically as follows:

[0118] Step S11, controlling the first sub-blower to operate at the lowest wind speed, and controlling the second sub-blower to be turned off.

[0119] Among the two sub-fans, the target fan operating at the lowest wind speed can be pre-set, determined based on instructions input by the user, or determined based on the actual scene conditions in the air conditioner's operating space that are actually monitored (such as the position of the human body, the opening and closing of doors and windows corresponding to the air outlets on both sides, etc.).

[0120] Here, when the air conditioner is provided with more than one air outlet, the indoor fan operates as a single fan in the sterilization mode. On the one hand, it can ensure that the tube temperature of the heat exchanger is increased to above the target sterilization temperature more quickly than when multiple fans are operated, thereby ensuring the sterilization effect and efficiency; on the other hand, it can reduce the discomfort caused to indoor users by excessive hot air being delivered into the room during the sterilization process (especially when the outdoor ambient temperature is greater than or equal to the preset temperature threshold).

[0121] Furthermore, in this embodiment, the distance between each air outlet and the object of action of the air conditioner can be obtained, and the air outlet farther from the user can be defined as the first air outlet, and the air outlet closer to the user can be defined as the second air outlet. Based on this, the distance between the first air outlet and the object of action of the air conditioner is defined as the first distance, and the distance between the second air outlet and the object of action of the air conditioner is defined as the second distance, and the first distance is greater than the second distance.

[0122] The air conditioner object here specifically refers to the object on which the air outlet of the air conditioner will have an impact on comfort or performance. In this embodiment, the air conditioner object is a human body, and in other embodiments, the air conditioner object can be a pet, a precision instrument, a stove, etc.

[0123] Specifically, the first distance and the second distance may be determined by obtaining parameters input by a user or based on a scene detection module (such as a human body detection module, an image recognition module) set by the air conditioner.

[0124] In this embodiment, in the sterilization mode, the fan corresponding to the air outlet closest to the user and other objects is turned off, while the fan corresponding to the air outlet farther away from the user and other objects runs at the lowest speed, ensuring that the hot air blown out by the air conditioner during the sterilization process will not affect the comfort or working performance of the user and other objects.

[0125] Furthermore, in this embodiment, after step S11, the following steps are further included:

[0126] Step S12, controlling the second sub-blower to start and controlling the compressor to maintain the current frequency operation;

[0127] Specifically, when the first sub-fan is running at the lowest wind speed, if the air conditioner operation meets the set conditions, for example, the first sub-fan runs at the lowest wind speed for a certain period of time or the indoor coil temperature reaches above the target sterilization temperature for a certain period of time or a set instruction input by the user is received, the air conditioner can be controlled to switch from running with the first sub-fan alone to running with the second sub-fan alone.

[0128] The fan switching process is as follows: define the operating frequency of the compressor as the first frequency when the air conditioner reaches the above-mentioned set conditions. Then, when the air conditioner reaches the set conditions, the second fan can be controlled to start and run at the lowest wind speed, and the compressor can maintain the first frequency operation.

[0129] Step S13, when the on time of the second sub-blower is less than the set time, controlling the first sub-blower to remain on;

[0130] Step S14: when the on time of the second sub-blower is greater than or equal to the set time, control the first sub-blower to be turned off.

[0131] The set time length can be specifically set according to the actual needs of the system stable operation. In this embodiment, the set time length is 30s. In other embodiments, the set time length can also be set to a longer or shorter time length according to actual conditions, such as 40s, 50s, 20s, etc.

[0132] The accumulated duration of the second sub-fan being turned on, when the duration is greater than or equal to the set duration, the first sub-fan can be turned off; when the duration is less than the set duration, the first sub-fan can be kept turned on.

[0133] During the sterilization process here, when it is necessary to switch the operation of the first sub-fan to the second sub-fan, the delayed shutdown of the first sub-fan is controlled by the above method, which can ensure that the change in system pressure after the second sub-fan is turned on is less than or equal to the set threshold (no sudden change will occur), and the operation of the second fan reaches a stable state, thereby ensuring the stable operation of the air-conditioning system; and in this process, the compressor maintains the original frequency operation, which can ensure that the indoor coil temperature can quickly reach the target sterilization temperature or be maintained above the target sterilization temperature after the second sub-fan is stably operated, effectively avoiding the difference in air outlet temperature before and after the two fans switch operation to affect the user's comfort.

[0134] Furthermore, when the outdoor ambient temperature is less than or equal to the first preset ambient temperature (indicating that there is a heating demand indoors), the single fan of the air conditioner in the sterilization process can be controlled to operate alternately according to steps S11 to S14 here; when the outdoor ambient temperature is greater than or equal to the second preset ambient temperature (indicating that there is a cooling demand indoors), the single fan operation of the air conditioner in the sterilization process can be controlled in such a way that the sub-fan farther away from the user is turned on and the sub-fan closer to the user is turned off.

[0135] In addition, an embodiment of the present invention further proposes a computer-readable storage medium, on which an air conditioning control program is stored. When the air conditioning control program is executed by a processor, the relevant steps of any embodiment of the above air conditioning control method are implemented.

[0136] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0137] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0138] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0139] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An air conditioning control method, characterized in that: The air conditioning control method comprises the following steps: When the air conditioner starts the sterilization mode, controlling the indoor fan of the air conditioner to run at the lowest wind speed; During the operation of the indoor fan at the lowest wind speed, the operating frequency of the air conditioner compressor is regulated according to the indoor heat exchanger temperature and the target sterilization temperature; The step of regulating the operating frequency of the air conditioner compressor according to the indoor heat exchanger temperature and the target sterilization temperature comprises: Obtaining the duration of the sterilization mode operation; If the duration is greater than or equal to the preset duration, the operating frequency of the compressor is regulated according to the indoor heat exchanger temperature and the target sterilization temperature within a frequency range less than or equal to the second frequency; If the duration is less than the preset duration, the operating frequency of the compressor is regulated according to the indoor heat exchanger temperature and the target sterilization temperature within a frequency range less than or equal to the first frequency; The first frequency is a parameter determined according to the rotation speed of the indoor fan, the second frequency is a parameter determined according to the outdoor ambient temperature, and the first frequency is smaller than the second frequency.

2. The air conditioning control method according to claim 1, characterized in that: The step of regulating the operating frequency of the air conditioner compressor according to the indoor heat exchanger temperature and the target sterilization temperature comprises: When the temperature of the indoor heat exchanger is lower than the target sterilization temperature, controlling the compressor to increase the operating frequency; When the temperature of the indoor heat exchanger is greater than the target sterilization temperature, the compressor is controlled to reduce the operating frequency.

3. The air conditioning control method according to claim 2, characterized in that: The step of controlling the compressor to reduce the operating frequency comprises: Determine the target frequency reduction parameter according to the first temperature difference; the first temperature difference is the temperature difference between the indoor heat exchanger temperature and the target sterilization temperature; The operating frequency of the compressor is reduced according to the target frequency reduction parameter.

4. The air conditioning control method according to claim 3, characterized in that: The target frequency reduction parameter includes a frequency reduction period and / or a frequency reduction amplitude, and the step of determining the target frequency reduction parameter according to the first temperature difference includes: Determine the frequency reduction period and / or the frequency reduction amplitude according to the first temperature difference; The frequency reduction period tends to increase as the first temperature difference increases, and the frequency reduction amplitude tends to increase as the first temperature difference increases.

5. The air conditioning control method according to claim 2, characterized in that: The step of regulating the operating frequency of the air conditioner compressor according to the indoor heat exchanger temperature and the target sterilization temperature also includes: When the indoor heat exchanger temperature is greater than the target sterilization temperature, determining a second temperature difference between the indoor heat exchanger temperature and the target sterilization temperature; If the second temperature difference is greater than or equal to the set temperature difference threshold, executing the step of controlling the compressor to reduce the operating frequency; If the second temperature difference is less than the set temperature difference threshold, the compressor is controlled to maintain operating at the current frequency.

6. The air conditioning control method according to any one of claims 1 to 5, characterized in that: The air conditioner comprises a housing, the housing is provided with at least a first air outlet and a second air outlet, the indoor fan comprises a first sub-fan and a second sub-fan, the first sub-fan is arranged corresponding to the first air outlet, and the second sub-fan is arranged corresponding to the second air outlet, and the step of controlling the indoor fan of the air conditioner to operate at the lowest wind speed comprises: The first sub-blower is controlled to operate at the lowest wind speed, and the second sub-blower is controlled to be turned off.

7. The air conditioning control method according to claim 6, characterized in that: The distance between the first air outlet and the object of action of the air conditioner is defined as a first distance, and the distance between the second air outlet and the object of action of the air conditioner is defined as a second distance, and the first distance is greater than the second distance.

8. The air conditioning control method according to claim 6, characterized in that: After the step of controlling the first sub-blower to operate at the lowest wind speed and controlling the second sub-blower to be turned off, the method further includes: Controlling the second sub-blower to start and controlling the compressor to maintain the current frequency operation; When the on time of the second sub-blower is less than the set time, controlling the first sub-blower to remain on; When the on time of the second sub-blower is greater than or equal to the set time, the first sub-blower is controlled to be turned off.

9. An air conditioner, characterized in that: The air conditioner comprises: a memory, a processor and an air conditioning control program stored in the memory and executable on the processor, wherein the air conditioning control program implements the steps of the air conditioning control method according to any one of claims 1 to 8 when executed by the processor.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores an air conditioning control program, and when the air conditioning control program is executed by the processor, the steps of the air conditioning control method according to any one of claims 1 to 8 are implemented.

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