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

Abstract

The application discloses a control method of an air conditioner, which comprises the following steps: acquiring the indoor heat exchanger temperature of the air conditioner when the air conditioner is in refrigeration operation; acquiring the reference frequency of the compressor under the current operation condition of the air conditioner; determining the frequency parameter according to the indoor heat exchanger temperature and the reference frequency; and controlling the operation of the compressor according to the frequency parameter, so that the outlet air temperature of the air conditioner is greater than the target temperature. The application also discloses an air conditioner and a computer readable storage medium. The application aims to avoid the excessively low outlet air temperature during the refrigeration process of the air conditioner and improve the indoor user comfort.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a control method for an air conditioner, an air conditioner, and a computer-readable storage medium. Background Technology

[0002] With the development of economy and technology, air conditioners are being used more and more widely, and users have higher and higher requirements for their performance. Currently, there is no limit to the outlet air temperature during the cooling operation of air conditioners, which can easily lead to excessively low outlet air temperatures, affecting the comfort of indoor users. Summary of the Invention

[0003] The main objective of this invention is to provide a control method for an air conditioner, an air conditioner, and a computer-readable storage medium, which aims to avoid excessively low air outlet temperature during the air conditioner's cooling process and improve indoor user comfort.

[0004] To achieve the above objectives, the present invention provides a control method for an air conditioner, the control method comprising the following steps:

[0005] When the air conditioner is in cooling mode, the indoor heat exchanger temperature of the air conditioner is obtained, and the operating condition parameters of the air conditioner are obtained; the operating condition parameters characterize the current operating condition of the air conditioner.

[0006] The frequency parameters are determined based on the indoor heat exchanger temperature and the operating parameters.

[0007] The compressor is controlled to operate according to the frequency parameters so that the air outlet temperature of the air conditioner is higher than the target temperature.

[0008] Optionally, the step of determining the frequency parameter based on the indoor heat exchanger temperature and the operating parameters includes:

[0009] Determine the target frequency required for the current operating conditions of the air conditioner based on the operating parameters.

[0010] The target frequency is corrected based on the indoor heat exchanger temperature to obtain the frequency parameter.

[0011] Optionally, the operating parameters include the indoor fan speed and ambient temperature of the air conditioner, and the step of determining the target frequency required for the current operating conditions of the air conditioner based on the operating parameters includes:

[0012] The target frequency is determined based on the indoor fan speed and the ambient temperature.

[0013] Optionally, the ambient temperature includes indoor ambient temperature and outdoor ambient temperature, and the step of determining the target frequency based on the indoor fan speed and the ambient temperature includes:

[0014] A first frequency is determined based on the indoor ambient temperature and the set temperature of the air conditioner, and a second frequency is determined based on the indoor fan speed and the ambient temperature.

[0015] The target frequency is determined based on the first frequency and the second frequency.

[0016] Optionally, the step of determining the second frequency based on the indoor fan speed and the ambient temperature includes:

[0017] The frequency limit value of the air conditioner is determined based on the outdoor ambient temperature and / or the indoor ambient temperature, and the frequency correction value is determined based on the indoor fan speed.

[0018] The frequency limit value is corrected according to the frequency correction value to obtain the second frequency.

[0019] Optionally, the step of determining the frequency limit value of the air conditioner based on the outdoor ambient temperature and / or the indoor ambient temperature includes:

[0020] The maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature is determined as the frequency limit value;

[0021] Alternatively, the step of determining the frequency limit value of the air conditioner based on the outdoor ambient temperature and / or the indoor ambient temperature includes:

[0022] The initial frequency limit value is obtained based on the indoor fan speed, and the frequency compensation value is determined based on the indoor ambient temperature and the outdoor ambient temperature.

[0023] The initial frequency limit value is corrected based on the frequency compensation value to obtain the frequency limit value.

[0024] Optionally, the step of correcting the target frequency based on the indoor heat exchanger temperature to obtain the frequency parameter includes:

[0025] When the temperature of the indoor heat exchanger is greater than the first preset temperature value, the target frequency is increased to obtain the frequency parameter.

[0026] When the temperature of the indoor heat exchanger is less than or equal to the second preset temperature value, the target frequency is reduced to obtain the frequency parameter.

[0027] Wherein, the second preset temperature value is less than or equal to the first preset temperature value, and the first preset temperature value and the second preset temperature value are determined according to the target temperature.

[0028] Optionally, the step of increasing the target frequency to obtain the frequency parameter includes:

[0029] The target frequency is increased according to a first frequency adjustment rate to obtain the frequency parameter; the first frequency adjustment rate increases with the increase of the indoor heat exchanger temperature.

[0030] And / or, the step of reducing the target frequency to obtain the frequency parameter includes:

[0031] The target frequency is reduced according to a second frequency adjustment rate to obtain the frequency parameter, wherein the second frequency adjustment rate increases as the temperature of the indoor heat exchanger decreases.

[0032] Optionally, the target frequency includes a first frequency and / or a second frequency, wherein the first frequency is determined based on the indoor ambient temperature and the set temperature of the air conditioner, and the second frequency is determined based on the outdoor ambient temperature and the indoor fan speed of the air conditioner;

[0033] The step of increasing the target frequency to obtain the frequency parameter includes:

[0034] Increase the second frequency to obtain the frequency parameter;

[0035] And / or, the step of reducing the target frequency to obtain the frequency parameter includes:

[0036] The characteristic frequency is reduced to obtain the frequency parameter; the characteristic frequency is the minimum value between the first frequency and the second frequency.

[0037] Optionally, after the step of determining the frequency parameter based on the indoor heat exchanger temperature and the operating parameters, the method further includes:

[0038] Obtain the protection frequency of the air conditioner under its current operating conditions; the protection frequency is the highest frequency at which the compressor is allowed to operate with the goal of protecting the air conditioner;

[0039] If the protection frequency is less than the frequency parameter, then the compressor is controlled to operate according to the protection frequency;

[0040] If the protection frequency is greater than the frequency parameter, then the step of controlling the compressor to operate according to the frequency parameter to make the air outlet temperature of the air conditioner greater than the target temperature is executed.

[0041] Optionally, the frequency parameter is the maximum allowed operating frequency value of the compressor, and the step of controlling the compressor operation according to the frequency parameter includes:

[0042] The compressor is controlled to operate at a frequency less than or equal to the maximum frequency value.

[0043] Optionally, the step of controlling the compressor to operate at a frequency less than or equal to the maximum frequency value includes:

[0044] Obtain the indoor fan speed of the air conditioner;

[0045] The target indoor heat exchanger temperature of the air conditioner is determined based on the indoor fan speed.

[0046] Within a frequency range less than or equal to the maximum frequency value, the operating frequency of the compressor is determined based on the target indoor heat exchanger temperature.

[0047] The compressor is controlled to operate at the stated operating frequency.

[0048] Optionally, the step of determining the target indoor heat exchanger temperature of the air conditioner based on the indoor fan speed includes:

[0049] The target indoor heat exchanger temperature is determined based on the speed range of the indoor fan. The target indoor heat exchanger temperature increases with the increase of the speed within the speed range.

[0050] Optionally, after the step of controlling the compressor to operate according to the frequency parameter, the method further includes:

[0051] During the process of controlling the compressor to operate according to the frequency parameters, the indoor fan of the air conditioner is controlled to operate at a speed greater than or equal to the target speed;

[0052] Wherein, the target speed is greater than the minimum speed at which the air conditioner is allowed to operate in the preset cooling mode, and the air outlet temperature of the air conditioner in the preset cooling mode is less than the target temperature.

[0053] Furthermore, in order to achieve the above objectives, this application also proposes an air conditioner, the air conditioner comprising:

[0054] compressor;

[0055] A control device, wherein the compressor is connected to the control device, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method as described in any of the preceding claims.

[0056] In addition, to achieve the above objectives, this application also proposes a computer-readable storage medium storing a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for the air conditioner as described in any of the preceding claims.

[0057] This invention proposes a control method for an air conditioner. During the cooling operation of the air conditioner, the method controls the operating frequency of the compressor by combining the indoor heat exchanger temperature and the current operating conditions of the air conditioner. This ensures that the cooling capacity of the compressor matches the actual heat exchange situation of the indoor heat exchanger and the actual operating conditions of the air conditioner, avoiding excessive cooling capacity of the compressor and effectively preventing the air outlet temperature from being too low during the cooling process, thereby improving the comfort of indoor users. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air conditioner of the present invention;

[0059] Figure 2 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0060] Figure 3 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0061] Figure 4 for Figure 3 Detailed flowchart of step S21

[0062] Figure 5 This is a flowchart illustrating another embodiment of the control method for the air conditioner of the present invention.

[0063] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0064] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0065] The main solution of this invention is as follows: when the air conditioner is in cooling operation, the indoor heat exchanger temperature and the operating parameters of the air conditioner are obtained; the operating parameters characterize the current operating conditions of the air conditioner; a frequency parameter is determined based on the indoor heat exchanger temperature and the operating parameters; and the compressor is controlled to operate according to the frequency parameter so that the air outlet temperature of the air conditioner is greater than the target temperature.

[0066] Because current technology does not limit the outlet air temperature during the cooling operation of air conditioners, the outlet air temperature is prone to being too low, affecting the comfort of indoor users.

[0067] The present invention provides the above-mentioned solution, which aims to avoid excessively low air outlet temperature during the cooling process of air conditioners and improve the comfort of indoor users.

[0068] This invention provides an air conditioner. The air conditioner can be a wall-mounted air conditioner, a cabinet air conditioner, a portable air conditioner, a window air conditioner, and / or a ceiling-mounted air conditioner, etc.

[0069] In this embodiment, refer to Figure 1 The air conditioner includes a compressor 1, an indoor fan 2, and a control device. Both the compressor 1 and the indoor fan 2 are connected to the control device, which can be used to control the operation of the compressor 1 and the indoor fan 2.

[0070] Specifically, the air conditioner also includes a casing and an indoor heat exchanger. The casing has an air outlet, and the casing has an air duct that communicates with the air outlet. The indoor fan 2 and the indoor heat exchanger are both located in the air duct. Driven by the indoor fan 2, indoor air enters the air duct and undergoes heat exchange through the indoor heat exchanger. The heat-exchanged air is then sent into the indoor environment from the air outlet.

[0071] Furthermore, the air conditioner includes a refrigerant circulation system, which comprises the compressor 1, the first heat exchanger, the throttling device, and the second heat exchanger connected in sequence. The heat exchanger located indoors is defined as the indoor heat exchanger, and the heat exchanger located outdoors is defined as the outdoor heat exchanger. During cooling operation, the indoor heat exchanger is in an evaporating state to absorb heat from the indoor air.

[0072] Furthermore, the air conditioner may also include a temperature detection module 3 for detecting the ambient temperature. The temperature detection module 3 is connected to a control device, which can acquire the data detected by the temperature detection module 3. Specifically, the temperature detection module 3 may include a first temperature sensor and / or a second temperature sensor. The first temperature sensor may be located in the indoor environment (such as the air conditioner's return air vent) to detect the indoor ambient temperature; the second temperature sensor may be located in the outdoor environment (such as the outdoor unit casing or the fresh air inlet) to detect the outdoor ambient temperature.

[0073] Furthermore, the air conditioner may also include a temperature sensor 4 for detecting the temperature of the indoor heat exchanger. The temperature sensor 4 can be connected to a control device, which can acquire the data detected by the temperature sensor 4. In this embodiment, the temperature sensor 4 is located on the coil of the indoor heat exchanger. In other embodiments, the temperature sensor 4 may also be located on the inner wall of the air duct near the indoor heat exchanger.

[0074] In this embodiment of the invention, reference is made to Figure 1 The control device of the air conditioner includes: a processor 1001 (e.g., CPU), a memory 1002, etc. The memory 1002 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk storage device. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0075] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0076] like Figure 1 As shown, the memory 1002, which is a computer-readable storage medium, may include a control program for an air conditioner. Figure 1 In the device shown, the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1002 and execute the relevant steps of the control method of the air conditioner in the following embodiments.

[0077] This invention also provides a control method for an air conditioner, which is used to control the air conditioner described above.

[0078] Reference Figure 2 This application proposes an embodiment of a control method for an air conditioner. In this embodiment, the control method for the air conditioner includes:

[0079] Step S10: When the air conditioner is in cooling operation, acquire the indoor heat exchanger temperature and the operating parameters of the air conditioner; the operating parameters characterize the current operating condition of the air conditioner.

[0080] The specific temperature of the indoor heat exchanger can be detected by a temperature sensor installed on the indoor heat exchanger.

[0081] Operating parameters may specifically include environmental parameters of the air conditioner's operating environment (such as ambient temperature and / or ambient humidity) and / or the current operating parameters of each refrigeration-related component in the air conditioner (such as indoor fan speed and / or outdoor fan speed).

[0082] It should be noted that there is no specific restriction on the order in which the operating parameters and the indoor heat exchanger temperature are obtained. They can be obtained sequentially or simultaneously according to actual needs. Specifically, the operating parameters can be obtained first and then the indoor heat exchanger temperature, or vice versa.

[0083] Step S20: Determine the frequency parameters based on the indoor heat exchanger temperature and the operating parameters;

[0084] The frequency parameter here specifically refers to the parameter used to control the compressor frequency. The frequency parameter can be the required operating frequency value of the compressor, or a frequency limit value (such as the maximum and / or minimum frequency value) during compressor operation. In this embodiment, the frequency parameter is the maximum allowed operating frequency value of the compressor.

[0085] Different indoor heat exchanger temperatures and operating parameters correspond to different frequency parameters. The correspondence between indoor heat exchanger temperature, operating parameters, and frequency parameters can be preset, and this correspondence can include calculation formulas and / or mapping relationships. For example, the frequency parameter can be calculated by substituting the indoor heat exchanger temperature and operating parameters into a preset formula; it can also be obtained by looking up the indoor heat exchanger temperature and operating parameters in a table; or, after determining the initial frequency based on the operating parameters, the indoor heat exchanger temperature can be used as the corrected frequency parameter, and so on.

[0086] Step S30: Control the compressor to operate according to the frequency parameters so that the air outlet temperature of the air conditioner is greater than the target temperature.

[0087] When the frequency parameter is the required operating frequency value for the compressor, the compressor can be controlled to operate at the required frequency parameter.

[0088] When the frequency parameter is the compressor's frequency limit value, the compressor's operating frequency can be adjusted to adapt to the actual coil temperature of the indoor heat exchanger, and its operating frequency will not exceed the frequency limit value during the adjustment process. For example, when the frequency limit value includes the minimum frequency, the compressor's operating frequency cannot be lower than the minimum frequency; when the frequency limit value includes the maximum frequency, the compressor's operating frequency cannot be higher than the maximum frequency.

[0089] The target temperature is specifically the air outlet temperature value that makes the user feel comfortable and not cold. The target temperature can be a preset fixed temperature value, a parameter determined based on the actual operating conditions of the air conditioner, or a temperature determined based on user-input settings. For example, the target temperature can be determined based on the outdoor ambient temperature or the indoor ambient temperature during cooling operation. In this embodiment, the target temperature range is [18℃, 23℃], for example, 20℃. Specifically, the target temperature is greater than or equal to the air conditioner's set temperature (i.e., the preset target value that the indoor ambient temperature needs to reach during the air conditioner's cooling operation).

[0090] This invention proposes a control method for an air conditioner. During the cooling operation of the air conditioner, the method controls the operating frequency of the compressor by combining the indoor heat exchanger temperature and the current operating conditions of the air conditioner. This ensures that the cooling capacity of the compressor matches the actual heat exchange situation of the indoor heat exchanger and the actual operating conditions of the air conditioner, avoiding excessive cooling capacity of the compressor and effectively preventing the air outlet temperature from being too low during the cooling process, thereby improving the comfort of indoor users.

[0091] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed.

[0092] In this embodiment, refer to Figure 3Step S20 includes:

[0093] Step S21: Determine the target frequency required for the current operating condition of the air conditioner based on the operating parameters;

[0094] The target frequency can be the frequency value required for the compressor to operate, or it can be the frequency limit value for the compressor.

[0095] Different operating parameters correspond to different target frequencies. The correspondence between operating parameters and target frequencies can be preset, and can take the form of a calculation relationship, a mapping relationship, etc.

[0096] Operating parameters may include one or more. When there are more than one operating parameter, the target frequency can be calculated by combining all of them; alternatively, different frequency values ​​can be determined based on different operating parameters, and the target frequency can be obtained by comparing the obtained frequency values; or the target frequency can be obtained by weighted averaging the obtained frequency values; or, the currently acquired operating parameters can be queried from a pre-set mapping table of operating parameters and frequencies, and the matching result can be used as the target frequency.

[0097] Step S22: Correct the target frequency according to the indoor heat exchanger temperature to obtain the frequency parameter.

[0098] Specifically, the correction parameters (such as correction method, correction value, or correction direction) of the target frequency can be determined based on the indoor heat exchanger temperature. The frequency parameters can be obtained by correcting the target frequency based on the determined correction parameters.

[0099] In this embodiment, the target frequency of the compressor is first determined based on the current operating conditions of the air conditioner. Then, the target frequency is corrected based on the indoor heat exchanger temperature to obtain the frequency parameters. This allows the compressor's cooling capacity to be constrained based on the actual indoor heat exchange conditions, ensuring that the cooling capacity is not too large and that the air outlet temperature of the air conditioner is above the target temperature.

[0100] Furthermore, after determining the target frequency, the air conditioner can be controlled to operate according to the target frequency. When the operation reaches the preset duration or the indoor ambient temperature reaches the preset temperature, the frequency parameters can be obtained by correcting the target frequency based on the indoor heat exchanger temperature to control the compressor operation.

[0101] Furthermore, in this embodiment, the operating parameters include the indoor fan speed of the air conditioner and the ambient temperature. The ambient temperature can include the indoor ambient temperature and / or the outdoor ambient temperature, which can be obtained by acquiring the detection data from the temperature detection module of the air conditioner. Based on this, step S21 includes: determining the target frequency based on the indoor fan speed and the ambient temperature.

[0102] Different indoor fan speeds and different ambient temperatures correspond to different target frequencies. Specifically, the target frequency can be calculated by substituting the indoor fan speed and ambient temperature into a preset formula; alternatively, the target frequency can be obtained by querying a pre-set mapping table using the indoor fan speed and ambient temperature.

[0103] Specifically, in this embodiment, the ambient temperature includes both indoor and outdoor ambient temperatures, and refers to... Figure 4 The process of determining the target frequency by considering ambient temperature and indoor fan speed is as follows (i.e., step S21 includes the following steps):

[0104] Step S211: Determine a first frequency based on the indoor ambient temperature and the set temperature of the air conditioner, and determine a second frequency based on the ambient temperature and the indoor fan speed;

[0105] The set temperature is specifically the target temperature value that the indoor ambient temperature needs to reach during the cooling operation of the air conditioner.

[0106] The second frequency is specifically the compressor operating frequency used to ensure that the air outlet temperature of the air conditioner is higher than the preset temperature, where the preset temperature is less than or equal to the target temperature mentioned above.

[0107] Different indoor ambient temperatures and different set temperatures correspond to different first frequencies. Specifically, the first frequency can be determined based on the temperature difference between the indoor ambient temperature and the set temperature. The larger the temperature difference, the higher the first frequency, and vice versa.

[0108] Different ambient temperatures (indoor and / or outdoor) and different indoor fan speeds correspond to different second frequencies. The second frequency increases with increasing ambient temperature and indoor fan speed. Conversely, the second frequency decreases with decreasing ambient temperature and indoor fan speed. In this embodiment, the second frequency is calculated using the ambient temperature and indoor fan speed. In other embodiments, the second frequency can also be obtained by querying a pre-set mapping relationship using the ambient temperature and indoor fan speed.

[0109] Step S212: Determine the target frequency based on the first frequency and the second frequency.

[0110] Specifically, one of the first frequency and the second frequency can be selected as the target frequency, or the result of a weighted average of the first frequency and the second frequency can be used as the target frequency, or even both the first frequency and the second frequency can be used as the target frequency. Subsequently, the frequency parameter is determined by selecting one of the first frequency and the second frequency based on the temperature of the indoor heat exchanger.

[0111] In this embodiment, the target frequency for compressor operation under current conditions is determined by a first frequency determined by the indoor ambient temperature and the set temperature, and a second frequency determined by the ambient temperature and the indoor fan speed. Specifically, the first frequency can characterize the heat exchange demand of the indoor environment, and the second frequency can characterize the compressor frequency demand when the outlet air temperature is maintained at a high temperature. Based on this, by combining the target frequency determined by the first and second frequencies, the indoor heat exchange demand can be met while ensuring that the outlet air temperature of the air conditioner is not too low, thus ensuring the comfort of indoor users.

[0112] Furthermore, in this embodiment, the process of determining the second frequency by combining the indoor fan speed and the ambient temperature is as follows: determining the frequency limit value of the air conditioner based on the outdoor ambient temperature and / or the indoor ambient temperature, determining the frequency correction value based on the indoor fan speed; correcting the frequency limit value based on the frequency correction value to obtain the second frequency.

[0113] The frequency limits here include the maximum and / or minimum allowed operating frequency of the compressor. Different outdoor and / or indoor ambient temperatures correspond to different frequency limit values. Different indoor fan speeds correspond to different frequency correction values. Specifically, the frequency correction value tends to increase as the indoor fan speed increases.

[0114] Specifically, the product, difference, or ratio of the frequency limit value and the frequency correction value can be used as the second frequency. Alternatively, after calculating the product, difference, or ratio of the frequency limit value and the frequency correction value, the result can be further corrected using preset parameters to obtain the second frequency.

[0115] Specifically, the determined second frequency is the maximum and / or minimum frequency used to limit the operation of the compressor.

[0116] For example, the second frequency can be calculated using the following formula:

[0117]

[0118] Among them, X NOW Wind speed rating can be expressed as the percentage of the current indoor fan speed relative to the rated maximum speed of the indoor fan. This represents the frequency correction value mentioned above. Fre -max and Fre _min This is the frequency limit value here. Where Fre -max This represents the maximum frequency at which the compressor is allowed to operate, within the frequency limit values. _minThe minimum frequency allowed for compressor operation within the frequency limit value can be preset to 20Hz or other values, or it can be obtained based on the indoor fan speed. Therefore, given the known frequency limit values ​​corresponding to the indoor fan speed and ambient temperature, the indoor fan speed and frequency limit values ​​can be substituted into the above formula, and the calculated result after correcting the frequency limit value based on the indoor fan speed can be used as the second frequency.

[0119] In this embodiment, by determining the second frequency in the above manner, it is possible to ensure that the determined second frequency can match the ambient temperature and ensure the reliable operation of the air conditioner. It is also adapted to the indoor fan speed for limitation, so as to effectively avoid the compressor frequency being too high at the current fan speed. This allows the cooling capacity of the air conditioner to be adapted to the fan speed limitation, ensuring that the operation of the compressor and the indoor fan are coordinated to ensure that the air outlet temperature of the air conditioner is not too low, thereby ensuring the comfort of indoor users during the cooling process.

[0120] Specifically, in one embodiment, the maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature is determined as the frequency limit value. Different outdoor ambient temperatures correspond to different maximum frequencies. The maximum frequency here tends to increase with increasing outdoor ambient temperature. In this embodiment, the temperature range of the outdoor ambient temperature is determined, and the frequency corresponding to the determined temperature range is taken as the maximum frequency. For example, when T4 > 40℃, the aforementioned Fre-max can be 50Hz (the specific value can be set according to factors such as the type of air conditioner); when T4 ≤ 40℃, the aforementioned Fre-max... -max The frequency can be 40 Hz (the specific value can be set according to factors such as the type of air conditioner). It should be noted that in other embodiments, 40 Hz can also be set to other threshold values, such as 35 Hz, 38 Hz, etc. In other embodiments, the maximum frequency can also be calculated directly from the outdoor ambient temperature.

[0121] In this embodiment, this ensures that the compressor operates reliably while the outlet air temperature is not too low, thus guaranteeing user comfort.

[0122] In another embodiment, an initial frequency limit value is obtained based on the indoor fan speed, and a frequency compensation value is determined based on the indoor and outdoor ambient temperatures. The initial frequency limit value is then corrected based on the frequency compensation value to obtain the final frequency limit value. Different indoor fan speeds correspond to different initial frequency limit values; the higher the indoor fan speed, the higher the initial frequency limit value, and vice versa. In this embodiment, the initial frequency limit value specifically includes the initial minimum frequency and the initial maximum frequency corresponding to the indoor fan speed. Based on this, the initial minimum frequency and the initial maximum frequency can be corrected based on the indoor and outdoor ambient temperatures, and the corrected minimum and maximum frequencies are used as the frequency limit values.

[0123] Specifically, the frequency limit value can be calculated using the following formula:

[0124] Fre -max =Fre_Warmwindmax+a_Warmwind*(T4-35)+b_Warmwind*(T1-27)——(2)

[0125] Fre -min =Fre_Warmwind min+a_Warmwind*(T4-35)+b_Warmwind*(T1-27)——(3);

[0126] Where T1 is the indoor ambient temperature, T4 is the outdoor ambient temperature, a_Warmwind is the correction factor for the outdoor environment (a known constant), and b_Warmwind is the correction factor for the indoor environment (a known constant). In this embodiment, a_Warmwind is greater than b_Warmwind, specifically 1.2 and 1.0 respectively. In other embodiments, other values ​​can be set according to actual needs. -max Fre is the maximum frequency value that the compressor is allowed to operate at in the frequency limit values. -min This represents the minimum allowed operating frequency of the compressor within the frequency limit values. Fre_Warmwindmin and Fre_Warmwindmax are the minimum and maximum allowed operating frequencies of the compressor at the current fan speed when the outlet air temperature is higher than the target temperature. In this embodiment, Fre_Warmwindmin and Fre_Warmwindmax are 20Hz and 35Hz, respectively, but other values ​​can be set in other embodiments.

[0127] Here we get Fre -max and Fre -min The second frequency can then be calculated by substituting it into the above formula (1).

[0128] Here, based on the frequency limit value determined by indoor and outdoor temperatures, the second frequency is obtained by adjusting the indoor fan speed. This ensures reliable operation of the air conditioner and comfortable indoor temperature while avoiding excessively low outlet air temperature, thus guaranteeing a comfortable outlet air temperature that meets the user's comfort needs.

[0129] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed.

[0130] In this embodiment, refer to Figure 5 Step S22 includes:

[0131] Step S221: When the temperature of the indoor heat exchanger is greater than the first preset temperature value, increase the target frequency to obtain the frequency parameter;

[0132] Step S222: When the temperature of the indoor heat exchanger is less than or equal to the second preset temperature value, the target frequency is reduced to obtain the frequency parameter;

[0133] Wherein, the second preset temperature value is less than or equal to the first preset temperature value, the second preset temperature value is less than or equal to the first preset temperature value, and the first preset temperature value and the second preset temperature value are determined according to the target temperature.

[0134] Specifically, the frequency parameter can be obtained by decreasing or increasing the target frequency according to a pre-set fixed frequency adjustment parameter, or by determining the corresponding frequency adjustment parameter based on the indoor heat exchanger temperature to decrease or increase the target frequency.

[0135] In this embodiment, when the indoor heat exchanger temperature is high, the compressor operation is controlled by increasing the frequency parameter obtained from the target frequency. This allows the compressor to operate at a higher frequency to ensure the air conditioner's cooling efficiency meets the cooling needs of the indoor users. Conversely, when the indoor heat exchanger temperature is low, the compressor operation is controlled by decreasing the frequency parameter obtained from the target frequency. This allows the compressor to operate at a lower frequency to ensure the air conditioner's outlet air temperature does not become too low. Specifically, by adjusting the target frequency based on the indoor heat exchanger temperature as described above and using it as the frequency parameter to control the compressor, it is ensured that the indoor heat exchanger temperature can be maintained between the first preset temperature value and the second preset temperature value, guaranteeing that the air conditioner's outlet air temperature reaches or exceeds the target temperature while maintaining optimal cooling efficiency.

[0136] Specifically, in this embodiment, the step of increasing the target frequency includes: increasing the target frequency according to a first frequency adjustment rate to obtain the frequency parameter; the first frequency adjustment rate increases with the increase of the indoor heat exchanger temperature. Specifically, the target frequency is gradually adjusted according to the first adjustment rate, and the result is used as the frequency parameter for controlling the compressor operation. The higher the indoor heat exchanger temperature, the faster the first frequency adjustment rate, ensuring that the compressor frequency can be effectively increased to ensure the cooling efficiency of the air conditioner when controlled according to the frequency parameter.

[0137] And / or, the step of reducing the target frequency to obtain the frequency parameter includes:

[0138] The target frequency is decreased according to a second frequency adjustment rate to obtain the frequency parameter, wherein the second frequency adjustment rate increases as the indoor heat exchanger temperature decreases. Specifically, the target frequency is gradually adjusted according to the second adjustment rate, and the result is used as the frequency parameter for controlling the compressor operation. The lower the indoor heat exchanger temperature, the faster the second frequency adjustment rate, ensuring that the compressor frequency is effectively limited to avoid excessively low air outlet temperature from the air conditioner when controlled according to the frequency parameter.

[0139] Furthermore, in this embodiment, the target frequency includes a first frequency and / or a second frequency. The first frequency is determined based on the indoor ambient temperature and the set temperature of the air conditioner, and the second frequency is determined based on the outdoor ambient temperature and the indoor fan speed of the air conditioner. The first and second frequencies here are the same concepts as those mentioned in the previous embodiments, and the determination process is not elaborated here. Based on this, the step of increasing the target frequency to obtain the frequency parameter includes: increasing the second frequency to obtain the frequency parameter. And / or, the step of decreasing the target frequency to obtain the frequency parameter includes: decreasing the characteristic frequency to obtain the frequency parameter; the characteristic frequency is the minimum value between the first frequency and the second frequency.

[0140] In this embodiment, when the indoor heat exchanger temperature is high, the frequency parameter is obtained by adjusting the frequency based on the second frequency. This ensures that when the frequency parameter is increased to control the compressor operation, the compressor frequency will not be too high, resulting in an excessively low air outlet temperature. The air outlet temperature can reach above the target temperature to ensure user comfort. When the indoor heat exchanger temperature is low, the frequency reference is obtained by adjusting the frequency based on the minimum value of the first and second frequencies. This ensures that when the frequency parameter is decreased to control the compressor operation, the compressor frequency can be quickly reduced to ensure that the air outlet temperature of the air conditioner is not too low and can be maintained above the target temperature to meet user comfort.

[0141] Furthermore, to better understand the process of determining the frequency parameter in the air conditioner control method mentioned in this embodiment, a specific application of the solution in this embodiment is provided below:

[0142] In this embodiment, the first frequency, the second frequency, and the frequency parameters are all the maximum frequency limits of the air conditioner compressor. Based on this, and on the frequency limits of f1 (the first frequency mentioned above) and f2 (the second frequency mentioned above), the frequency parameters for controlling the operation of the compressor are calculated according to the temperature T2 (indoor heat exchanger temperature) as follows:

[0143] When T2 > 22.5℃, the highest frequency limit f2 increases by 2Hz every 60 seconds.

[0144] When 22.5 ≥ T2 > 21.5℃, the highest frequency limit f2 increases by 1 Hz every 90 seconds;

[0145] When 21.5 ≥ T2 > 20.5℃, the highest frequency limit f2 increases by 0.5 Hz every 90 seconds;

[0146] When 20.5 ≥ T2 ≥ 19.5℃, the maximum frequency limit f2 value is not processed, and the maximum frequency limit is updated after an interval of 180 seconds;

[0147] When 19.5 > T2 ≥ 18.5℃, the frequency is reduced by 0.5 Hz every 90 seconds based on the minimum value between f1 and f2.

[0148] When 18.5 > T2 ≥ 17.5℃, the temperature is reduced by 1 Hz at 90 s intervals based on the minimum value between f1 and f2.

[0149] When T2 < 17.5℃, the temperature is reduced by 2 Hz at 60 s intervals based on the minimum value of f1 and f2.

[0150] Furthermore, based on any of the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, after the step of determining the frequency parameter based on the indoor heat exchanger temperature and the operating condition parameters, the method further includes: obtaining the protection frequency under the current operating condition of the air conditioner; the protection frequency is the highest frequency at which the compressor is allowed to operate with the goal of protecting the air conditioner; if the protection frequency is less than the frequency parameter, then the compressor is controlled to operate according to the protection frequency; if the protection frequency is greater than the frequency parameter, then the step of controlling the compressor to operate according to the frequency parameter to make the air outlet temperature of the air conditioner greater than the target temperature is executed. Here, the determined frequency parameter can ensure that the air outlet temperature is greater than the target temperature. Before controlling the compressor to operate according to the determined frequency parameter, it is compared with the protection frequency of the air conditioner, and the compressor is controlled to operate at the lower frequency in the comparison result, thereby ensuring that the air outlet temperature is not too low to meet user comfort while protecting the reliable operation of the air conditioning system.

[0151] Furthermore, based on any of the above embodiments, another embodiment of the air conditioner control method of this application is proposed. In this embodiment, the frequency parameter is the maximum allowed operating frequency value of the compressor, and the step of controlling the compressor to operate according to the frequency parameter includes: controlling the compressor to operate at a frequency less than or equal to the maximum frequency value. Based on this, the operating frequency of the air conditioner can be limited to prevent it from being too high, ensuring that the air outlet temperature of the air conditioner is not too high or too low, and can reach above the target temperature to meet the user's comfort.

[0152] Specifically, within a frequency range less than or equal to the maximum frequency value, the compressor can operate at a fixed frequency or at a variable frequency.

[0153] Specifically, in this embodiment, the indoor fan speed of the air conditioner is obtained; the target indoor heat exchanger temperature of the air conditioner is determined based on the indoor fan speed; within a frequency range less than or equal to the maximum frequency value, the operating frequency of the compressor is determined based on the target indoor heat exchanger temperature; and the compressor is controlled to operate at the operating frequency.

[0154] The target indoor heat exchanger temperature is specifically the target temperature that the indoor heat exchanger needs to achieve during cooling operation. The target indoor heat exchanger temperature can be a pre-set fixed parameter or a parameter determined based on the actual operating status of the air conditioner (e.g., based on the indoor fan speed and / or the current indoor ambient temperature). Specifically, the compressor frequency adjustment parameters (such as the frequency adjustment direction (e.g., increasing or decreasing frequency), frequency adjustment amplitude, or frequency adjustment rate) can be determined based on the temperature difference between the current temperature of the indoor heat exchanger and the first target indoor heat exchanger temperature. The compressor frequency is then controlled according to the determined frequency adjustment parameters to ensure that the indoor heat exchanger reaches the target indoor heat exchanger temperature within a certain time frame.

[0155] Specifically, the higher the indoor fan speed, the higher the target indoor heat exchanger temperature. The target indoor heat exchanger temperature can be calculated from the indoor fan speed, or it can be obtained by looking up a table based on the indoor fan speed.

[0156] Specifically, in this embodiment, the target indoor heat exchanger temperature is determined based on the rotational speed range of the indoor fan, and the target indoor heat exchanger temperature increases with the increase of rotational speed within the rotational speed range.

[0157] In this embodiment, T2 is defined as the preset indoor heat exchanger temperature. The correspondence between different indoor fan speeds and the target indoor heat exchanger temperature is shown in the table below:

[0158] Indoor fan speed Target indoor heat exchanger temperature 1％-20％ T2-k1 20％-40％ T2-k2 40％-60％ T2 60％-80％ T2+k3 80％-100％ T2+k4

[0159] In this embodiment, the compressor operation is controlled by determining the target indoor heat exchanger temperature based on the indoor fan speed, thereby achieving precise control of the compressor frequency and ensuring that the compressor and fan work together to ensure that the air outlet temperature of the air conditioner can accurately reach above the target temperature, thus ensuring user comfort.

[0160] Furthermore, based on any of the above embodiments, in this embodiment, after the step of controlling the compressor to operate according to the frequency parameters, the method further includes: during the process of controlling the compressor to operate according to the frequency parameters, controlling the indoor fan of the air conditioner to operate at a speed greater than or equal to the target speed; wherein, the target speed is greater than the minimum speed allowed for the air conditioner to operate in the preset cooling mode, and the air outlet temperature of the air conditioner in the preset cooling mode is less than the target temperature.

[0161] For example, if the minimum speed in the preset cooling mode is 5% N, then in the process of controlling the compressor operation according to the frequency parameter, the minimum speed that the indoor fan is allowed to operate at is 20% N. Based on this, it can be ensured that the indoor fan speed is not too low, resulting in an excessively low outlet air temperature, and further ensure that the outlet air temperature of the air conditioner can reach above the target temperature to meet user comfort.

[0162] Within a speed range greater than or equal to the target speed, if a user-inputted speed setting exists, the indoor fan will be controlled to operate at that speed. If no user-inputted speed setting exists, the indoor fan will be controlled to operate at a speed determined by the temperature difference between the indoor ambient temperature and the set temperature. This ensures that the air conditioner's output meets user comfort requirements.

[0163] Furthermore, this invention also proposes a computer-readable storage medium storing a control program for an air conditioner. When the control program is executed by a processor, it implements the relevant steps of any of the above-described air conditioner control methods.

[0164] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0165] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0166] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0167] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The control method for the air conditioner includes the following steps: When the air conditioner is in cooling mode, the indoor heat exchanger temperature of the air conditioner is obtained, and the operating condition parameters of the air conditioner are obtained; the operating condition parameters characterize the current operating condition of the air conditioner. The frequency parameters are determined based on the indoor heat exchanger temperature and the operating parameters. The step of determining the frequency parameter based on the indoor heat exchanger temperature and the operating parameters includes: The target frequency required for the current operating conditions of the air conditioner is determined based on the operating parameters, wherein the operating parameters include the indoor fan speed of the air conditioner and the ambient temperature, and the ambient temperature includes the indoor ambient temperature and the outdoor ambient temperature. The step of determining the target frequency required for the current operating condition of the air conditioner based on the operating parameters includes: A first frequency is determined based on the indoor ambient temperature and the set temperature of the air conditioner, and a second frequency is determined based on the indoor fan speed and the ambient temperature. The step of determining the second frequency based on the indoor fan speed and the ambient temperature includes: The frequency limit value of the air conditioner is determined based on the outdoor ambient temperature and / or the indoor ambient temperature, and the frequency correction value is determined based on the indoor fan speed. The step of determining the frequency limit value of the air conditioner based on the outdoor ambient temperature and / or the indoor ambient temperature includes: The maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature is determined as the frequency limit value; Alternatively, the step of determining the frequency limit value of the air conditioner based on the outdoor ambient temperature and / or the indoor ambient temperature includes: The initial frequency limit value is obtained based on the indoor fan speed, and the frequency compensation value is determined based on the indoor ambient temperature and the outdoor ambient temperature. The initial frequency limit value is corrected based on the frequency compensation value to obtain the frequency limit value; The frequency limit value is corrected according to the frequency correction value to obtain the second frequency; The target frequency is determined based on the first frequency and the second frequency; The target frequency is corrected based on the indoor heat exchanger temperature to obtain the frequency parameter; The compressor is controlled to operate according to the frequency parameters so that the air outlet temperature of the air conditioner is higher than the target temperature.

2. The control method for an air conditioner as described in claim 1, characterized in that, The step of determining the target frequency required for the current operating condition of the air conditioner based on the operating parameters includes: The target frequency is determined based on the indoor fan speed and the ambient temperature.

3. The control method for an air conditioner as described in claim 1, characterized in that, The step of correcting the target frequency based on the indoor heat exchanger temperature to obtain the frequency parameter includes: When the temperature of the indoor heat exchanger is greater than the first preset temperature value, the target frequency is increased to obtain the frequency parameter. When the temperature of the indoor heat exchanger is less than or equal to the second preset temperature value, the target frequency is reduced to obtain the frequency parameter. Wherein, the second preset temperature value is less than or equal to the first preset temperature value, and the first preset temperature value and the second preset temperature value are determined according to the target temperature.

4. The control method for an air conditioner as described in claim 3, characterized in that, The step of increasing the target frequency to obtain the frequency parameter includes: The target frequency is increased according to a first frequency adjustment rate to obtain a frequency parameter; the first frequency adjustment rate increases with the increase of the indoor heat exchanger temperature. And / or, the step of reducing the target frequency to obtain the frequency parameter includes: The target frequency is reduced according to a second frequency adjustment rate to obtain a frequency parameter, wherein the second frequency adjustment rate increases as the temperature of the indoor heat exchanger decreases.

5. The control method for an air conditioner as described in claim 3, characterized in that, The target frequency includes a first frequency and / or a second frequency, wherein the first frequency is determined based on the indoor ambient temperature and the set temperature of the air conditioner, and the second frequency is determined based on the outdoor ambient temperature and the indoor fan speed of the air conditioner. The step of increasing the target frequency to obtain the frequency parameter includes: Increase the second frequency to obtain the frequency parameter; And / or, the step of reducing the target frequency to obtain the frequency parameter includes: The characteristic frequency is reduced to obtain the frequency parameter; the characteristic frequency is the minimum value between the first frequency and the second frequency.

6. The control method for an air conditioner as described in claim 1, characterized in that, After the step of determining the frequency parameter based on the indoor heat exchanger temperature and the operating parameters, the method further includes: Obtain the protection frequency of the air conditioner under its current operating conditions; the protection frequency is the highest frequency at which the compressor is allowed to operate with the goal of protecting the air conditioner; If the protection frequency is less than the frequency parameter, then the compressor is controlled to operate according to the protection frequency; If the protection frequency is greater than the frequency parameter, then the step of controlling the compressor to operate according to the frequency parameter to make the air outlet temperature of the air conditioner greater than the target temperature is executed.

7. The control method for an air conditioner as described in any one of claims 1 to 6, characterized in that, The frequency parameter is the maximum allowed operating frequency value of the compressor, and the step of controlling the compressor operation according to the frequency parameter includes: The compressor is controlled to operate at a frequency less than or equal to the maximum frequency value.

8. The control method for an air conditioner as described in claim 7, characterized in that, The step of controlling the compressor to operate at a frequency less than or equal to the maximum frequency value includes: Obtain the indoor fan speed of the air conditioner; The target indoor heat exchanger temperature of the air conditioner is determined based on the indoor fan speed. Within a frequency range less than or equal to the maximum frequency value, the operating frequency of the compressor is determined based on the target indoor heat exchanger temperature. The compressor is controlled to operate at the stated operating frequency.

9. The control method for an air conditioner as described in claim 8, characterized in that, The step of determining the target indoor heat exchanger temperature of the air conditioner based on the indoor fan speed includes: The target indoor heat exchanger temperature is determined based on the speed range of the indoor fan. The target indoor heat exchanger temperature increases with the increase of the speed within the speed range.

10. The control method for an air conditioner as described in any one of claims 1 to 6, characterized in that, After the step of controlling the compressor operation according to the frequency parameters, the method further includes: During the process of controlling the compressor to operate according to the frequency parameters, the indoor fan of the air conditioner is controlled to operate at a speed greater than or equal to the target speed; Wherein, the target speed is greater than the minimum speed at which the air conditioner is allowed to operate in the preset cooling mode, and the air outlet temperature of the air conditioner in the preset cooling mode is less than the target temperature.

11. An air conditioner, characterized in that, The air conditioner includes: compressor; A control device, wherein the compressor is connected to the control device, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method as described in any one of claims 1 to 10.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for an air conditioner as described in any one of claims 1 to 10.

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