Control method of air conditioner, air conditioner, and storage medium

Abstract

The application discloses a control method of an air conditioner, the air conditioner and a storage medium. The method comprises the following steps: controlling a compressor of the air conditioner to operate at a low frequency, and detecting a compression ratio of the compressor; when the compression ratio is less than a preset compression ratio, controlling a throttling device between an indoor heat exchanger and an outdoor heat exchanger of the air conditioner to reduce an opening degree, and / or controlling a fan corresponding to a heat exchanger in an evaporation state to increase a rotating speed. The application aims to reduce noise and vibration generated in the process of low-frequency operation of the compressor and improve the operation reliability of the compressor.

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 storage medium. Background Technology

[0002] When air conditioner compressors (especially multi-split air conditioners) operate at low frequencies, noise and vibration are likely to occur due to valve closure and airflow. Currently, noise and vibration are generally reduced by strengthening sound insulation cotton, adding counterweight damping blocks, or optimizing the internal structure of the compressor. However, excessive adjustment of structural components can easily lead to reliability problems during compressor operation. 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 storage medium, which aims to reduce the noise and vibration generated during the low-frequency operation of the compressor while improving the reliability of the compressor operation.

[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] Control the air conditioner compressor to operate at low frequency and detect the compression ratio of the compressor;

[0006] When the compression ratio is less than the preset compression ratio, the throttling device between the indoor heat exchanger and the outdoor heat exchanger in the air conditioner is controlled to reduce its opening, and / or the fan corresponding to the heat exchanger in the evaporation state in the air conditioner is controlled to increase its speed.

[0007] Optionally, the step of controlling the throttling device to reduce the opening degree includes:

[0008] Determine the relationship between the compression ratio and the preset compression ratio;

[0009] The adjustment rate of the throttling device is determined based on the relationship value;

[0010] The throttling device is controlled to reduce its opening according to the adjustment rate.

[0011] Optionally, the relationship value includes a ratio that is negatively correlated with the adjustment rate.

[0012] Optionally, the steps of controlling the throttling device between the indoor and outdoor heat exchangers in the air conditioner to reduce its opening and / or controlling the fan corresponding to the heat exchanger in the evaporation state in the air conditioner to increase its speed include:

[0013] Control the throttling device to reduce its opening degree;

[0014] When the throttling device reaches its minimum opening and the current compression ratio of the compressor is less than the preset compression ratio, the fan speed is increased.

[0015] Optionally, the step of controlling the fan to increase its rotational speed includes:

[0016] Control the fan to switch to a set speed, wherein the set speed is not less than 50% of the maximum speed of the fan corresponding to the evaporator;

[0017] The fan speed is increased according to the target rate until the current compression ratio of the compressor is not less than the preset compression ratio.

[0018] Optionally, the control method for the air conditioner further includes:

[0019] Obtain the indoor temperature of the indoor space regulated by the air conditioner;

[0020] When the indoor temperature does not reach the corresponding set temperature, the steps of controlling the air conditioner's compressor to run at low frequency and detecting the compressor's compression ratio are executed.

[0021] The steps for controlling the low-frequency operation of the air conditioner's compressor include:

[0022] The compressor's operating frequency is adjusted within a preset low-frequency range based on the indoor temperature.

[0023] Optionally, the compressor's displacement is less than a preset displacement, the preset displacement being the standard displacement corresponding to the air conditioner reaching a preset cooling capacity, and the preset low-frequency range being no less than 8Hz and no more than 15Hz.

[0024] Optionally, the control method for the air conditioner further includes:

[0025] When the energy-saving mode start command is received, the steps of controlling the air conditioner's compressor to run at low frequency and detecting the compressor's compression ratio are executed.

[0026] Alternatively, when the energy demand of the air conditioner is less than the preset energy demand, the steps of controlling the air conditioner's compressor to operate at low frequency and detecting the compressor's compression ratio are executed.

[0027] Alternatively, when the air conditioner is in cooling mode and the ambient temperature is lower than the preset temperature, the steps of controlling the air conditioner's compressor to run at low frequency and detecting the compressor's compression ratio are executed.

[0028] In addition, to achieve the above objectives, this application also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein when the air conditioner control program is executed by the processor, it implements the steps of the air conditioner control method as described in any of the preceding claims.

[0029] In addition, to achieve the above objectives, this application also proposes a 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.

[0030] This invention proposes a control method for an air conditioner. This method detects the compressor's compression ratio during low-frequency operation. When the compression ratio is less than a preset compression ratio, indicating a risk of noise and vibration, the method reduces the opening of the throttling device and / or increases the speed of the corresponding fan in the evaporator. This helps reduce the low-pressure of the compressor, decreases noise and vibration generated by the compressor's valves operating at excessively low compression ratios, and reduces the need for optimized adjustments to compressor components. This avoids excessive adjustments to compressor components affecting operational reliability, thereby reducing noise and vibration generated during low-frequency operation while improving compressor operational reliability. Attached Figure Description

[0031] 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;

[0032] Figure 2 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0033] Figure 3 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0034] Figure 4 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0035] Figure 5 This is a flowchart illustrating another embodiment of the control method for the air conditioner of the present invention.

[0036] 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

[0037] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0038] This invention provides an air conditioner. In this embodiment, the air conditioner is a multi-split air conditioner. In other embodiments, the air conditioner may also be an integrated air conditioner or an air conditioner with a single indoor heat exchanger.

[0039] In this embodiment, refer to Figure 1 The air conditioner includes a control device 100, a compressor 200, at least two indoor heat exchangers, a throttling device 300, and an outdoor heat exchanger. The at least two indoor heat exchangers, the throttling device 300, and the outdoor heat exchanger are connected sequentially. The at least two indoor heat exchangers and the outdoor heat exchanger are respectively connected to the exhaust port and return port of the compressor 200. An outdoor fan 400 is provided for each outdoor heat exchanger, and an indoor fan 500 is provided for each indoor heat exchanger. The compressor 200, the throttling device 300, the indoor fan 500, and the outdoor fan 400 are all connected to the control device 100.

[0040] When the air conditioner is in cooling mode, the refrigerant discharged by the compressor 200 flows sequentially through the outdoor heat exchanger, the throttling device 300, and the indoor heat exchanger before returning to the compressor 200. The indoor heat exchanger is in an evaporating state, while the outdoor heat exchanger is in a condensing state.

[0041] When the air conditioner is in heating mode, the refrigerant discharged by the compressor 200 flows sequentially through the indoor heat exchanger, the throttling device 300 and the outdoor heat exchanger before returning to the compressor 200. The indoor heat exchanger is in a condensing state, and the outdoor heat exchanger is in an evaporating state.

[0042] In this embodiment, compressor 200 is a rotary compressor and a small-displacement compressor. The displacement of the small-displacement compressor is 70% to 75% of that of the large-displacement compressor, and the minimum frequency of the small-displacement compressor is less than or equal to 50% of the minimum frequency of the large-displacement compressor. The minimum frequency of the large-displacement compressor is in the range of [16Hz, 24Hz], and the minimum frequency of the small-displacement compressor is in the range of [8Hz, 15Hz].

[0043] In this embodiment, the displacement of the large-displacement compressor is greater than or equal to the standard displacement corresponding to the preset cooling capacity of the air conditioner.

[0044] In this embodiment of the invention, reference is made to Figure 1 The control device 100 of the air conditioner includes: a processor 1001, such as a CPU, a memory 1002, and a timer 1003. These components are connected and communicate with each other via a communication bus. The memory 1002 can be a high-speed RAM or a stable, 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.

[0045] 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.

[0046] like Figure 1 As shown, the memory 1002, which serves as a computer storage medium, may include a control program for an air conditioner.

[0047] exist 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.

[0048] This invention also provides a control method for an air conditioner, applied to the aforementioned air conditioner.

[0049] 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:

[0050] Step S10: Control the air conditioner compressor to run at low frequency and detect the compression ratio of the compressor;

[0051] In this embodiment, when the air conditioner is in cooling mode, step S10 is executed.

[0052] The frequency at which the compressor operates at low frequency should not exceed 20% of the maximum allowable operating frequency of the compressor.

[0053] The compressor can operate at a fixed low frequency or adjust the frequency within a preset low frequency range.

[0054] During the low-frequency operation of the compressor, the discharge pressure and return pressure of the compressor are monitored, and the ratio of discharge pressure to return pressure is taken as the compressor pressure.

[0055] Step S20: When the compression ratio is less than the preset compression ratio, control the throttling device between the indoor heat exchanger and the outdoor heat exchanger in the air conditioner to reduce the opening degree, and / or control the fan corresponding to the heat exchanger in the evaporation state in the air conditioner to increase the speed.

[0056] The preset compression ratio is the minimum compression ratio that the compressor is allowed to operate at low frequencies without generating noise or vibration. The preset compression ratio can be a fixed compression ratio or a compression ratio determined based on the compressor's current operating frequency.

[0057] When the compression ratio is less than the preset compression ratio, it indicates that the compressor will produce noise and vibration; when the compression ratio is greater than or equal to the preset compression ratio, it indicates that the compressor will not produce noise and vibration.

[0058] Reducing the opening degree of the throttling device and / or increasing the speed of the fan corresponding to the heat exchanger in the evaporation state helps to reduce the return gas pressure of the compressor, thereby increasing the compression ratio of the compressor.

[0059] When the throttling device reduces the opening degree, it can be adjusted according to a preset fixed opening degree adjustment value, or the opening degree adjustment parameters (such as opening degree adjustment amplitude and / or opening degree adjustment rate, etc.) can be determined according to the parameters related to the actual operating status of the air conditioner, and the throttling device can be controlled to reduce the opening degree according to the determined opening degree adjustment parameters.

[0060] When the fan corresponding to the heat exchanger in the evaporation state increases its speed, it can be adjusted according to a pre-set fixed speed adjustment value, or the speed adjustment parameters (such as speed adjustment amplitude and / or speed adjustment rate) can be determined according to the parameters related to the actual operating state of the air conditioner, and the fan corresponding to the heat exchanger in the evaporation state can be controlled to increase its speed according to the determined speed adjustment parameters.

[0061] It should be noted that during the adjustment of parameters of the fan and / or throttling device, the compressor is controlled to maintain low-frequency operation.

[0062] In this embodiment, the air conditioner is in cooling mode, and the heat exchanger in the evaporation state is the indoor fan. When the air conditioner is a multi-split air conditioner, in at least two indoor units of the multi-split air conditioner, the indoor fan in the indoor unit that is currently turned on is controlled to increase its speed.

[0063] This invention proposes a control method for an air conditioner. During low-frequency operation of the compressor, the method detects the compressor's compression ratio. When the compression ratio is less than a preset compression ratio, indicating a risk of noise and vibration, the method reduces the opening of the throttling device and / or increases the speed of the corresponding fan in the evaporator. This helps reduce the low-pressure of the compressor, decreases noise and vibration generated by the compressor's valves operating at excessively low compression ratios, and reduces the need for optimized adjustments to compressor components. This avoids excessive adjustments to compressor components affecting operational reliability, thereby reducing noise and vibration generated during low-frequency operation while improving compressor operational reliability.

[0064] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed.

[0065] In this embodiment, refer to Figure 3 The step of controlling the throttling device to reduce the opening degree includes:

[0066] Step S21: Determine the relationship between the compression ratio and the preset compression ratio;

[0067] Determine the ratio of the compression ratio to the preset compression ratio, or determine the difference between the compression ratio and the preset compression ratio. The relationship value includes either the ratio or the difference.

[0068] Step S22: Determine the adjustment rate of the throttling device based on the relationship value;

[0069] Different relation values ​​correspond to different adjustment rates. A pre-established correspondence between relation values ​​and adjustment rates can be established, which may include preset formulas, mapping relationships, or machine learning models. Based on this correspondence, the adjustment rate corresponding to the current relation value can be determined.

[0070] In one implementation of this embodiment, the relationship value includes a ratio, which is negatively correlated with the adjustment rate. That is, the larger the ratio, the smaller the adjustment rate, and the smaller the ratio, the larger the adjustment rate. For example, if the compression ratio is defined as N1 and the preset compression ratio is N, the adjustment rate is 2 when N1 / N < 90%; the adjustment rate is 1 when 90% < N1 / N < 95%; and the adjustment rate is 0.5 when N1 / N > 95%.

[0071] In another implementation of this embodiment, the relationship value includes the difference value, which is positively correlated with the adjustment rate. That is, the larger the difference value, the larger the adjustment rate, and the smaller the difference value, the smaller the adjustment rate.

[0072] Step S23: Control the throttling device to reduce the opening degree according to the adjustment rate.

[0073] In this embodiment, the adjustment rate is determined by combining the relationship between the compression ratio and the preset compression ratio to control the throttling device to reduce the opening degree. This helps to reduce the noise generated during the process of reducing the opening degree of the throttling device, while quickly and smoothly increasing the compression ratio to above the preset compression ratio. This helps to reduce the noise and vibration during the low-frequency operation of the compressor, while further improving the reliability of the compressor operation.

[0074] 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, reference is made to... Figure 4 The steps of controlling the throttling device between the indoor and outdoor heat exchangers in the air conditioner to reduce its opening and / or controlling the fan corresponding to the heat exchanger in the evaporation state in the air conditioner to increase its speed include:

[0075] Step S201: Control the throttling device to reduce its opening degree;

[0076] Step S202: When the opening degree of the throttling device reaches the minimum opening degree and the current compression ratio of the compressor is less than the preset compression ratio, the fan speed is controlled to increase.

[0077] Specifically, when the opening degree of the throttling device has not reached the minimum opening degree, the throttling device is controlled to reduce the opening degree according to the above-determined adjustment rate.

[0078] In this embodiment, the noise and vibration of the compressor are first reduced by decreasing the opening of the throttling device. When the opening of the throttling device reaches its minimum, but the compression ratio of the compressor does not reach the preset compression ratio, the noise and vibration of the compressor are further reduced by increasing the speed of the fan corresponding to the evaporator. Otherwise, the noise and vibration are reduced by decreasing the opening of the throttling device alone. This reduces the noise brought to the indoor environment by the increase in the speed of the fan corresponding to the evaporator, thereby effectively reducing the overall noise of the air conditioner and improving the reliability of compressor operation.

[0079] Furthermore, in this embodiment, the step of controlling the fan to increase its speed includes: controlling the fan to switch to a set speed, wherein the set speed is not less than 50% of the maximum speed of the fan corresponding to the evaporator; controlling the fan to increase its speed according to a target rate until the current compression ratio of the compressor is not less than the preset compression ratio.

[0080] In this embodiment, the rotational speed is set to be no less than 50% of the maximum rotational speed of the fan corresponding to the evaporator. For example, the rotational speed is set to 60% of the maximum rotational speed.

[0081] The target rate can be a preset fixed rate or a rate determined based on the actual operating conditions of the air conditioner. For example, when the air conditioner is in cooling mode, the target rate can be determined based on the current compression ratio of the compressor, the current coil temperature of the indoor heat exchanger, and the temperature difference between the indoor ambient temperature and the set temperature. Specifically, the first rate is determined based on the relationship between the current compression ratio and the preset compression ratio, the second rate is determined based on the current coil temperature of the indoor heat exchanger, the first weight value corresponding to the first rate and the second weight value corresponding to the second rate are determined based on the temperature difference value, and the target rate is obtained by weighted averaging the first rate and the second rate according to the first weight value and the second weight value. This ensures that the fan speed adjustment can effectively balance indoor comfort and reduce the noise of the air conditioner as a whole.

[0082] During the process of controlling the fan speed to increase according to the target rate, the compression ratio of the compressor is detected in real time. If the detected compression ratio is less than the preset compression ratio, the fan speed can continue to be controlled to increase according to the target rate. If the detected compression ratio is greater than or equal to the preset compression ratio, the fan can be controlled to maintain the current speed.

[0083] Furthermore, in this embodiment, when the opening degree of the throttling device reaches the minimum opening degree and the current compression ratio of the compressor is less than the preset compression ratio, if the indoor fan speed is lower than the set speed, the step of controlling the fan to switch to the set speed can be executed.

[0084] In this embodiment, the fan is first switched to a higher speed, and then the fan speed is gradually increased according to the target rate. This is beneficial because the adjustment time is too long when the fan speed is low, while ensuring the reliable operation of the compressor during the adjustment process. This quickly and smoothly reduces the operating noise and vibration of the compressor, and further improves the operating reliability of the compressor.

[0085] 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, reference is made to... Figure 5 The control method for the air conditioner further includes:

[0086] Step S01: Obtain the indoor temperature of the indoor space regulated by the air conditioner;

[0087] When the air conditioner is a multi-split air conditioner, the ambient temperature of the space where the indoor unit is currently running is obtained as the indoor temperature.

[0088] Step S02: When the indoor temperature does not reach the corresponding set temperature, adjust the operating frequency of the compressor within a preset low-frequency range according to the indoor temperature, and detect the compression ratio of the compressor.

[0089] When the air conditioner is used to regulate only one indoor space, it can control the compressor to run from the current frequency to the target frequency within a preset low-frequency range, based on the temperature difference between the indoor temperature and the set temperature.

[0090] When the air conditioner regulates more than one indoor space, if more than one indoor space does not reach the corresponding set temperature, the temperature difference between the indoor temperature of all the indoor spaces that do not reach the set temperature and the set temperature is determined. Based on the temperature difference of more than one space, the target frequency required for the compressor to operate is determined within a preset low-frequency range, and the compressor is controlled to operate from the current frequency to the target frequency. If one indoor space does not reach the corresponding set temperature, the compressor can be controlled to operate from the current frequency to the target frequency within a preset low-frequency range based on the temperature difference between that indoor space and the set temperature.

[0091] In this embodiment, the above-described method helps to reduce compressor energy consumption while ensuring user comfort in the indoor environment through low-frequency operation of the compressor. During low-frequency operation, the operating noise and vibration of the compressor are reduced and the operating reliability of the compressor is improved by the methods mentioned in the above embodiment.

[0092] Furthermore, in this embodiment, the displacement of the compressor is less than the preset displacement, the preset displacement is the standard displacement corresponding to the air conditioner reaching the preset cooling capacity, and the preset low frequency range is not less than 8Hz and not greater than 15Hz.

[0093] The preset low-frequency range is determined based on the frequency range allowed for compressor operation. The lower limit of the preset low-frequency range is the lower limit of the frequency range allowed for compressor operation. The compressor's displacement is less than the preset displacement. The standard displacement is the minimum displacement that a large-displacement compressor can achieve. In other words, the compressor is a small-displacement compressor. The preset low-frequency range is not less than 8Hz and not greater than 15Hz, which is smaller than the minimum frequency range [16Hz, 24Hz] allowed for large-displacement compressors. Based on this, the air conditioner uses a small-displacement compressor with a smaller displacement than a typical large-displacement compressor. The reliability risk during low-frequency operation is higher than that of a large-displacement compressor, and the risk of noise and vibration is also higher. In this case, the risk of noise and vibration of the compressor is identified in the above manner, and throttling devices and / or fan parameter adjustments are used to reduce the noise and vibration of the compressor, thereby effectively reducing the noise and vibration problems of the small-displacement compressor air conditioning system and improving the operational reliability of the air conditioner.

[0094] Furthermore, based on any of the above embodiments, in this embodiment, the control method of the air conditioner further includes: upon receiving a start command for the energy-saving mode, executing the step of controlling the compressor of the air conditioner to operate at low frequency and detecting the compression ratio of the compressor; or, when the energy demand of the air conditioner is less than a preset energy demand, executing the step of controlling the compressor of the air conditioner to operate at low frequency and detecting the compression ratio of the compressor; or, when the air conditioner is in a cooling state and the ambient temperature is less than a preset temperature, executing the step of controlling the compressor of the air conditioner to operate at low frequency and detecting the compression ratio of the compressor.

[0095] The energy demand value can be determined based on the number of currently active indoor units and / or the temperature difference between the indoor temperature of all active indoor units and the set temperature.

[0096] In this embodiment, the ambient temperature includes the indoor ambient temperature and the outdoor ambient temperature. When the air conditioner is in cooling mode, if the indoor ambient temperature is lower than the first preset temperature and the outdoor ambient temperature is lower than the second preset temperature, the compressor can be controlled to operate at a low frequency.

[0097] In this embodiment, when any of the above conditions are met, the compressor is triggered to operate at low frequency, thereby effectively reducing the operating energy consumption of the air conditioner.

[0098] Furthermore, this embodiment of the invention also proposes a storage medium storing a control program for an air conditioner. When the control program for the air conditioner is executed by a processor, it implements the relevant steps of any embodiment of the control method for the air conditioner described above.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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, if the indoor temperature of the room regulated by the air conditioner does not reach the corresponding set temperature, the operating frequency of the air conditioner's compressor is adjusted within a preset low-frequency range according to the indoor temperature, and the compression ratio of the compressor is detected. In the cooling mode, the outdoor heat exchanger of the air conditioner is in a condensing state and the indoor heat exchanger of the air conditioner is in an evaporating state. The displacement of the compressor is less than the preset displacement, which is the standard displacement corresponding to the air conditioner reaching the preset cooling capacity. The frequency of the preset low-frequency range is not less than 8Hz and not more than 15Hz. When the compression ratio is less than the preset compression ratio, the throttling device between the indoor heat exchanger and the outdoor heat exchanger in the air conditioner is controlled to reduce its opening. The step of reducing the opening degree of the throttling device between the indoor and outdoor heat exchangers in the air conditioner includes: Determine the ratio of the compression ratio to the preset compression ratio; The adjustment rate of the throttling device is determined based on the ratio, wherein the ratio is negatively correlated with the adjustment rate; The throttling device is controlled to reduce its opening according to the adjustment rate.

2. The control method for an air conditioner as described in claim 1, characterized in that, After the steps of adjusting the operating frequency of the air conditioner's compressor within a preset low-frequency range based on the indoor temperature and detecting the compressor's compression ratio, the method further includes: When the compression ratio is less than the preset compression ratio, the throttling device between the indoor heat exchanger and the outdoor heat exchanger in the air conditioner is controlled to reduce its opening, and the fan corresponding to the heat exchanger in the evaporation state in the air conditioner is controlled to increase its speed.

3. The control method for an air conditioner as described in claim 2, characterized in that, The steps of controlling the throttling device between the indoor and outdoor heat exchangers in the air conditioner to reduce its opening and controlling the fan corresponding to the heat exchanger in the evaporation state in the air conditioner to increase its speed include: Control the throttling device to reduce its opening degree; When the throttling device reaches its minimum opening and the current compression ratio of the compressor is less than the preset compression ratio, the fan speed is increased.

4. The control method for an air conditioner as described in claim 3, characterized in that, The step of controlling the fan to increase its speed includes: The fan is controlled to switch to a set speed, which is not less than 50% of the maximum speed of the fan corresponding to the evaporator. The fan speed is increased according to the target rate until the current compression ratio of the compressor is not less than the preset compression ratio.

5. An air conditioner, characterized in that, The air conditioner includes: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor. When the control program for the air conditioner is executed by the processor, it implements the steps of the control method for the air conditioner as described in any one of claims 1 to 4.

6. A storage medium, characterized in that, The 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 4.

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