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

Abstract

The present invention discloses a method for controlling an air conditioner, the method comprising: obtaining a first exhaust temperature and a second exhaust temperature; the first exhaust temperature is detected by a first temperature sensor provided on the air conditioner compressor, and the second exhaust temperature is detected by a second temperature sensor provided on an exhaust pipe, the exhaust pipe being used to connect the exhaust port of the compressor with a four-way valve or heat exchanger of the air conditioner; determining whether an abnormality exists in the refrigerant circulation system of the air conditioner based on the first exhaust temperature and the second exhaust temperature; if an abnormality is determined in the refrigerant circulation system, controlling the air conditioner to perform a protection operation. The present invention also discloses an air conditioner and a computer-readable storage medium. The present invention aims to improve the accuracy of identifying abnormalities in the refrigerant circulation system of the air conditioner, thereby improving the timeliness of abnormality protection for the air conditioning system.

Description

Technical Field

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

[0002] With the development of economy and technology, air conditioners are being used more and more widely. However, due to the diversity of their application scenarios and improper installation, the refrigerant circulation system of air conditioners can easily suffer from abnormalities such as leakage, impurities, and ice blockage.

[0003] At present, air conditioners generally use a temperature sensor installed on the compressor exhaust pipe to detect the exhaust temperature to indicate system abnormalities. When the exhaust temperature is too high, corresponding protection actions are performed. However, since the refrigerant flowing out of the compressor to the exhaust pipe will continue to decrease with the heat exchange temperature, it is easy to miss reports when performing abnormal protection on the system based on the detected exhaust temperature, resulting in failure to timely perform abnormal protection on the air conditioning system. Summary of the Invention

[0004] The main purpose of the present invention is to provide a control method for an air conditioner, an air conditioner and a computer-readable storage medium, aiming to improve the accuracy of abnormality identification of the air conditioner refrigerant circulation system and improve the timeliness of abnormality protection of the air conditioning system.

[0005] To achieve the above object, the present invention provides a method for controlling an air conditioner, the method comprising the following steps:

[0006] Acquiring a first exhaust temperature and a second exhaust temperature; the first exhaust temperature is detected by a first temperature sensor provided on the air conditioner compressor, and the second exhaust temperature is detected by a second temperature sensor provided on an exhaust pipe, the exhaust pipe being used to connect the exhaust port of the compressor with a four-way valve or a heat exchanger of the air conditioner;

[0007] determining whether a refrigerant circulation system of the air conditioner has an abnormality according to the first exhaust temperature and the second exhaust temperature;

[0008] If it is determined that the refrigerant circulation system is abnormal, the air conditioner is controlled to perform a protection operation.

[0009] Optionally, the step of determining whether there is an abnormality in the refrigerant circulation system of the air conditioner according to the first exhaust temperature and the second exhaust temperature includes:

[0010] determining a target exhaust temperature based on the first exhaust temperature and the second exhaust temperature;

[0011] When the target exhaust temperature is greater than a set temperature threshold, determining that an abnormality exists in the refrigerant circulation system;

[0012] When the target exhaust temperature is less than or equal to the set temperature threshold, it is determined that there is no abnormality in the refrigerant circulation system.

[0013] Optionally, the step of determining a target exhaust temperature according to the first exhaust temperature and the second exhaust temperature includes:

[0014] The maximum value of the first exhaust gas temperature and the second exhaust gas temperature is determined as the target exhaust gas temperature.

[0015] Optionally, after the step of determining that an abnormality exists in the refrigerant circulation system when the target exhaust temperature is greater than a set temperature threshold, the method further includes:

[0016] If it is determined that the refrigerant circulation system is abnormal, the protection operation is determined according to the temperature range of the target exhaust temperature, and the step of controlling the air conditioner to perform the protection operation is performed.

[0017] Optionally, the step of determining the protection operation according to the temperature range of the target exhaust temperature includes:

[0018] When the target exhaust temperature is within a first temperature range, determining that the protection operation includes shutting down the compressor;

[0019] When the target exhaust temperature is within a second temperature range, determining that the protection operation includes reducing the frequency of the compressor;

[0020] The temperature in the first temperature interval is greater than the temperature in the second temperature interval, and the temperature in the second temperature interval is greater than the set temperature threshold.

[0021] Optionally, after the step of determining that an abnormality exists in the refrigerant circulation system when the target exhaust temperature is greater than a set temperature threshold, the method further includes:

[0022] If it is determined that there is an abnormality in the refrigerant circulation system, when the target exhaust temperature is within the second temperature range, if the air conditioner meets a preset condition, then the step of determining that the protection operation includes shutting down the compressor is executed; if the air conditioner does not meet the preset condition, then the step of determining that the protection operation includes reducing the frequency of the compressor is executed;

[0023] The preset conditions include at least one of the following:

[0024] The first exhaust temperature is greater than a preset exhaust temperature;

[0025] The temperature difference between the first exhaust temperature and the second exhaust temperature is greater than or equal to a set temperature difference value;

[0026] The operating current of the compressor is less than a set current value.

[0027] Optionally, the step of determining that the protection operation includes reducing the frequency of the compressor includes:

[0028] Determining the protection operation includes reducing the frequency of the compressor at a target rate.

[0029] Optionally, the air conditioner control method further includes: obtaining the set temperature threshold according to the outdoor fan speed and the compressor motor speed.

[0030] Optionally, the first temperature sensor is arranged inside the compressor, on the top of the compressor or at a preset position of the compressor, and the preset position is the outer wall of the compressor and is aligned with the internal motor of the compressor.

[0031] In addition, in order to achieve the above-mentioned purpose, the present application also proposes an air conditioner, which includes:

[0032] compressor;

[0033] A control device, the compressor is connected to the control device, the control device includes: a memory, a processor and an air conditioner control program stored in the memory and runnable on the processor, 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 the above items.

[0034] In addition, in order to achieve the above-mentioned purpose, the present application also proposes a computer-readable storage medium, on which a control program of an air conditioner is stored. When the control program of the air conditioner is executed by a processor, the steps of the control method of the air conditioner as described in any of the above items are implemented.

[0035] The present invention proposes a control method for an air conditioner. The method determines whether there is an abnormality in the refrigerant circulation system of the air conditioner based on a first exhaust temperature and a second exhaust temperature, and performs a protection operation through the air conditioner when an abnormality exists in the refrigerant circulation system. The exhaust temperature is no longer detected solely by a temperature sensor arranged on the exhaust pipe. A sensor arranged on the compressor is added to detect the exhaust temperature. Since the temperature sensor on the compressor is close to the heating motor, it can more accurately reflect the heating condition of the compressor. Therefore, the first exhaust temperature and the second exhaust temperature are combined to perform abnormality judgment, thereby improving the accuracy of abnormality identification of the refrigerant circulation system of the air conditioner, which is beneficial to avoid missed reports when performing abnormal protection on the system, so as to improve the timeliness of abnormal protection of the air conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the hardware structure involved in the operation of an air conditioner according to an embodiment of the present invention;

[0037] Figure 2 A flow chart of an embodiment of a method for controlling an air conditioner according to the present invention;

[0038] Figure 3 A flow chart of another embodiment of a method for controlling an air conditioner according to the present invention;

[0039] Figure 4 FIG. 4 is a flow chart of another embodiment of a method for controlling an air conditioner according to the present invention.

[0040] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0041] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] The main solution of the embodiment of the present invention is: obtaining a first exhaust temperature and a second exhaust temperature; the first exhaust temperature is detected by a first temperature sensor provided inside the air conditioner compressor, and the second exhaust temperature is detected by a second temperature sensor provided in an exhaust pipe, and the exhaust pipe is used to connect the exhaust port of the compressor with the four-way valve or heat exchanger of the air conditioner; determining whether there is an abnormality in the refrigerant circulation system of the air conditioner based on the first exhaust temperature and the second exhaust temperature; if it is determined that there is an abnormality in the refrigerant circulation system, controlling the air conditioner to perform a protection operation.

[0043] In the prior art, air conditioners generally detect the exhaust temperature through a temperature sensor installed in the compressor exhaust pipe to indicate system abnormalities, and perform corresponding protection actions when the exhaust temperature is too high. However, since the refrigerant flowing out of the compressor to the exhaust pipe will continue to decrease with the heat exchange temperature, it is easy to miss reports when performing abnormal protection on the system based on the detected exhaust temperature, resulting in failure to timely perform abnormal protection on the air conditioning system.

[0044] The present invention provides the above-mentioned solution, aiming to improve the accuracy of identifying abnormalities in the refrigerant circulation system of the air conditioner, so as to improve the timeliness of abnormality protection of the air conditioning system.

[0045] An embodiment of the present invention provides an air conditioner, which may be a wall-mounted air conditioner, a cabinet air conditioner, a portable air conditioner, a window air conditioner, a ceiling-mounted air conditioner, or the like.

[0046] In the embodiment of the present invention, referring to Figure 1, the air conditioner specifically includes a refrigerant circulation system and a control device. The refrigerant circulation system includes a compressor 1, an indoor heat exchanger, a throttling device and an outdoor heat exchanger connected in sequence. Furthermore, the refrigerant circulation system may also include a four-way valve, the four interfaces of which are respectively connected to the indoor heat exchanger, the outdoor heat exchanger, the exhaust port and the return air port of the compressor 1. Specifically, the first temperature sensor 2 may be arranged inside the compressor 1, on the top of the compressor 1 or at a preset position of the compressor 1, and the preset position is the outer wall of the compressor 1 and is aligned with the internal motor of the compressor 1.

[0047] The compressor 1 is connected to a control device, which can be used to control the compressor 1 to stop or reduce its frequency.

[0048] Specifically, refer to Figure 1 A first temperature sensor 2 may be provided inside the compressor 1. The first temperature sensor 2 is used to detect a first exhaust temperature of the compressor 1. The first temperature sensor 2 is connected to the control device. The control device can obtain data detected by the first temperature sensor 2.

[0049] Further, refer to Figure 1 The exhaust port of compressor 1 is connected to the four-way valve or the aforementioned heat exchanger via an exhaust pipe. The air conditioner may further include a second temperature sensor 3 disposed in the exhaust pipe. Second temperature sensor 3 may be used to detect a second exhaust gas temperature. Second temperature sensor 3 is connected to a control device. Data detected by second temperature sensor 3 may be obtained by the control device.

[0050] Further, in the embodiment of the present invention, referring to Figure 1 The air conditioner control device includes a processor 1001 (e.g., a CPU), a memory 1002, and a timer 1003. The memory 1002 can be a high-speed RAM memory or a non-volatile memory such as a disk drive. The memory 1002 can also be a storage device independent of the processor 1001.

[0051] Those skilled in the art will understand that Figure 1 The device structure shown in the figure does not constitute a limitation of the device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0052] like Figure 1 As shown, the memory 1002 as a computer readable storage medium may include a control program for the air conditioner. Figure 1In the device shown, the processor 1001 can be used to call the air conditioner control program stored in the memory 1002 and execute the relevant steps of the air conditioner control method in the following embodiments.

[0053] An embodiment of the present invention further provides a method for controlling an air conditioner, which is applied to control the operation of the air conditioner.

[0054] Reference Figure 2 , an embodiment of a control method for an air conditioner of the present application is proposed. In this embodiment, the control method for an air conditioner includes:

[0055] Step S10, acquiring a first exhaust temperature and a second exhaust temperature; the first exhaust temperature is detected by a first temperature sensor disposed inside the air conditioner compressor, and the second exhaust temperature is detected by a second temperature sensor disposed in an exhaust pipe, the exhaust pipe being used to connect the exhaust port of the compressor to a four-way valve or a heat exchanger of the air conditioner;

[0056] After the compressor is started, the data detected by the first temperature sensor and the second temperature sensor can be obtained in real time or at set intervals to obtain the first exhaust gas temperature and the second exhaust gas temperature.

[0057] Specifically, the first temperature sensor is arranged inside the compressor, on the top of the compressor or at a preset position of the compressor, and the preset position is an outer wall of the compressor and is aligned with an internal motor of the compressor.

[0058] Step S20, determining whether there is an abnormality in the refrigerant circulation system of the air conditioner based on the first exhaust temperature and the second exhaust temperature;

[0059] The abnormality in the refrigerant circulation system specifically includes refrigerant leakage and / or refrigerant blockage (specifically, blockage may be caused by ice blockage, water or impurities in the refrigerant).

[0060] Different first exhaust gas temperatures and second exhaust gas temperatures correspond to different abnormality determination results of the refrigerant circulation system.

[0061] Specifically, the first exhaust temperature and the second exhaust temperature can be compared with the corresponding temperature thresholds or the deviation can be calculated respectively, and whether the refrigerant circulation system of the air conditioner has an abnormality can be determined based on the obtained results. Alternatively, the exhaust characteristic temperature of the compressor can be determined by combining the first exhaust temperature and the second exhaust temperature, and whether the refrigerant circulation system has an abnormality can be judged based on the determined exhaust characteristic temperature.

[0062] In step S30 , if it is determined that the refrigerant circulation system is abnormal, the air conditioner is controlled to perform a protection operation.

[0063] In this embodiment, the air conditioner's protective operation specifically includes controlling the compressor to shut down or reduce its frequency. Specifically, if an abnormality is determined in the refrigerant circulation system, the interval between the compressor startup time and the current time when the abnormality is determined in the refrigerant circulation system may be obtained. If the interval is less than or equal to a preset time, the compressor is controlled to shut down; if the interval is greater than the preset time, the compressor is controlled to reduce its frequency.

[0064] In other embodiments, in addition to reducing the frequency or shutting down the compressor, the protection operation of the air conditioner can also be to control the operation of other components in the refrigerant circulation system, such as increasing the opening of the electronic expansion valve, increasing the speed of the outdoor fan, etc.

[0065] An embodiment of the present invention proposes a control method for an air conditioner. The method determines whether there is an abnormality in the refrigerant circulation system of the air conditioner based on a first exhaust temperature and a second exhaust temperature, and performs a protection operation through the air conditioner when an abnormality exists in the refrigerant circulation system. The exhaust temperature is no longer detected solely by a temperature sensor arranged on the exhaust pipe. A sensor arranged on the compressor is also added to detect the exhaust temperature. Since the temperature sensor on the compressor is close to the heating motor, it can more accurately reflect the heating condition of the compressor. Therefore, the first exhaust temperature and the second exhaust temperature are combined to perform abnormality judgment, thereby improving the accuracy of abnormality identification of the refrigerant circulation system of the air conditioner, which is beneficial to avoid missed reports when performing abnormal protection on the system, so as to improve the timeliness of abnormal protection of the air conditioning system.

[0066] Furthermore, based on the above embodiment, another embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, referring to Figure 3 , the step S20 includes:

[0067] Step S21, determining a target exhaust temperature according to the first exhaust temperature and the second exhaust temperature;

[0068] Specifically, one of the first and second exhaust temperatures can be selected as the target exhaust temperature based on characteristic operating parameters of the air conditioner or preset rules. In this embodiment, the maximum of the first and second exhaust temperatures is determined as the target exhaust temperature, thereby improving the timeliness of abnormality protection. In other embodiments, one of the first and second exhaust temperatures can be selected as the target exhaust temperature based on the continuous operation time after the compressor is started. For example, if the continuous operation time is greater than or equal to the preset time, the second exhaust temperature can be selected as the target exhaust temperature; if the continuous operation time is less than the preset time, the first exhaust temperature can be selected as the target exhaust temperature.

[0069] Alternatively, the target exhaust temperature may be calculated based on the first and second exhaust temperatures in combination with the air conditioner's operating characteristic parameters. For example, the target exhaust temperature may be calculated by taking the average of the first and second exhaust temperatures. Alternatively, the target exhaust temperature may be calculated by taking the weighted average of the first and second exhaust temperatures according to their respective weights. The weights may be based on the distance between the second temperature sensor and the compressor motor and the current compressor electrode speed.

[0070] Step S22: When the target exhaust temperature is greater than a set temperature threshold, it is determined that an abnormality exists in the refrigerant circulation system;

[0071] Step S23: When the target exhaust temperature is less than or equal to the set temperature threshold, it is determined that there is no abnormality in the refrigerant circulation system.

[0072] The set temperature threshold here can be a pre-set default parameter, or it can be a parameter selected from more than one pre-set temperature threshold based on the actual operating conditions of the air conditioner. In this embodiment, to ensure more accurate abnormality identification results, the set temperature threshold is obtained based on the outdoor fan speed and the compressor motor speed. The higher the outdoor fan speed, the lower the set temperature threshold, and the higher the motor speed, the higher the set temperature threshold.

[0073] Among them, when the target exhaust temperature is greater than the set temperature threshold, it can be considered that the target exhaust temperature is too high due to refrigerant blockage and inability to circulate normally or refrigerant leakage resulting in too little refrigerant. At this time, it can be considered that the refrigerant circulation system has an abnormality; otherwise, it can be considered that the refrigerant circulation system is circulating normally and there is no abnormality.

[0074] In this embodiment, the target exhaust temperature determined by the first exhaust temperature and the second exhaust temperature is comprehensively determined to determine whether there is an abnormality in the refrigerant circulation system of the air conditioner based on the relationship between the target exhaust temperature and the set temperature threshold. Since the target exhaust temperature can accurately reflect the current temperature condition on the exhaust side of the compressor, the problem of excessively high exhaust side temperature caused by abnormal refrigerant circulation can be accurately identified based on the target exhaust temperature, thereby providing timely protection to ensure the normal operation of the air conditioner.

[0075] In other embodiments, the first exhaust temperature and the second exhaust temperature can also be compared with corresponding temperature thresholds respectively. When the first exhaust temperature is greater than the first preset temperature and the second exhaust temperature is greater than the second preset temperature, it can be determined that there is an abnormality in the refrigerant circulation system of the air conditioner; when the first exhaust temperature is less than or equal to the first preset temperature, or the second exhaust temperature is less than or equal to the second preset temperature, it can be determined that there is no abnormality in the refrigerant circulation system of the air conditioner.

[0076] Furthermore, based on any of the above embodiments, another embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, referring to Figure 4 After step S22, the method further includes:

[0077] In step S301 , if it is determined that the refrigerant circulation system is abnormal, the protection operation is determined according to the temperature range of the target exhaust temperature, and the step of controlling the air conditioner to perform the protection operation is performed.

[0078] Among them, the protection operation is different when the target exhaust temperature is in different temperature intervals. Specifically, in this embodiment, when the target exhaust temperature is in the first temperature interval, it is determined that the protection operation includes stopping the compressor; when the target exhaust temperature is in the second temperature interval, it is determined that the protection operation includes reducing the frequency of the compressor; the temperature of the first temperature interval is greater than the temperature of the second temperature interval, and the temperature of the second temperature interval is greater than the set temperature threshold. The first temperature interval and the second temperature interval here can be used to distinguish the risk of accidents in the current abnormal state of the air conditioner. Here, the compressor is stopped only when the target exhaust temperature is too high and the risk of failure is high, otherwise the compressor is reduced in frequency, which is beneficial to protect the system while maintaining the stability of the system operation.

[0079] Specifically, the first temperature interval and the second temperature interval may be pre-set default intervals. Furthermore, to improve the accuracy of identifying system abnormalities, the first temperature interval and the second temperature interval may be determined based on the outdoor fan speed and the compressor motor speed. A higher outdoor fan speed results in lower thresholds for the first and second temperature intervals, while a higher motor speed results in higher thresholds for the first and second temperature intervals.

[0080] The step of determining that the protection operation includes reducing the frequency of the compressor includes: determining that the protection operation includes reducing the frequency of the compressor at a target rate. The target rate here can be a preset rate or a rate determined based on the actual operating conditions of the air conditioner (such as the outdoor ambient temperature and / or the outdoor unit speed, etc.).

[0081] In other embodiments, in addition to reducing the frequency or shutting down the compressor, the protection operation of the air conditioner can also be to control the operation of other components in the refrigerant circulation system, such as increasing the opening of the electronic expansion valve, increasing the speed of the outdoor fan, etc. Based on this, more temperature ranges can be divided, and different temperature ranges can correspond to different protection operations.

[0082] Among them, when the protection operation is other operations than the compressor shutdown, after step S30, it is possible to return to execute step S10 and count the number of times when the air-conditioning refrigerant circulation system determines an abnormality after the compressor starts. Based on this, when it is determined that there is an abnormality in the refrigerant circulation system, if the counted number is greater than or equal to the set threshold, it can be determined that the protection operation is the compressor shutdown; if the counted number is less than the set threshold, the protection operation can be determined according to the temperature range where the target exhaust temperature is located.

[0083] In this embodiment, based on the temperature range where the target exhaust temperature is located, the protection operation required for the air conditioner when the system refrigerant circulation is abnormal is obtained, ensuring the accuracy of the protection operation performed by the air conditioner, protecting the system and ensuring the stable operation of the system at the same time.

[0084] Further, in this embodiment, if it is determined that the refrigerant circulation system is abnormal, when the target exhaust temperature is in the second temperature range, if the air conditioner meets the preset conditions, then execute the step of determining that the protection operation includes the compressor shutdown; if the air conditioner does not meet the preset conditions, then execute the step of determining that the protection operation includes compressor frequency reduction; the preset conditions include at least one of the following:

[0085] The first exhaust temperature is greater than the preset exhaust temperature;

[0086] The temperature difference between the first exhaust temperature and the second exhaust temperature is greater than or equal to the set temperature difference value;

[0087] The operating current of the compressor is less than the set current value.

[0088] Taking a specific application as an example, define TP as the target exhaust temperature, the first exhaust temperature as TP1, the second exhaust temperature as TP2, the preset exhaust temperature as T, the set temperature difference value as ΔT2, the operating current as DL, and the set current value as X. Then when Tx1 < TP ≤ Tx2 (that is, the target exhaust temperature is in the second temperature range), if TP1 ≥ T, TP1 - TP2 ≥ ΔT2 and DL < X, the compressor can be controlled to stop; when Tx1 < TP ≤ Tx2, if TP1 < T, TP1 - TP2 < ΔT2 or DL ≥ X, the compressor can be controlled to run at a reduced frequency. Here, the value range of Tx1 is 100°C to 105°C, the value range of Tx2 is 110°C to 115°C, the value range of T is 90°C to 105°C, the value range of ΔT2 is greater than or equal to 10°C, and the value range of X is 2A to 5A.

[0089] Specifically, when the target exhaust temperature is too high but the risk is not significant, if the first exhaust temperature is too high, the temperature difference between the first and second exhaust temperatures is too large, or the compressor operating current is too low, this may indicate that the refrigerant circulation system is at a high risk of an accident under the current abnormality. Based on this, if the air conditioner meets at least one of the aforementioned pre-set conditions when the target exhaust temperature is too high, shutting down the compressor can help avoid air conditioning system accidents and ensure safe operation. If the air conditioner does not meet at least one of the aforementioned pre-set conditions, it can be considered that the risk of an accident under the current abnormality is low. In this case, the compressor is operated at a reduced frequency to prevent accidents while maintaining stable operation.

[0090] In addition, an embodiment of the present invention further proposes a computer-readable storage medium, on which a control program for an air conditioner is stored. When the control program for the air conditioner is executed by a processor, the relevant steps of any embodiment of the above air conditioner control method are implemented.

[0091] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0092] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0093] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0094] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The control method of the air conditioner comprises the following steps: obtaining a first exhaust temperature and a second exhaust temperature; the first exhaust temperature being detected by a first temperature sensor provided on the air conditioner compressor, and the second exhaust temperature being detected by a second temperature sensor provided on an exhaust pipe, the exhaust pipe being used to connect the exhaust port of the compressor to a four-way valve or a heat exchanger of the air conditioner, the first temperature sensor being provided on an outer wall of the compressor and aligned with an internal motor of the compressor; determining whether a refrigerant circulation system of the air conditioner has an abnormality according to the first exhaust temperature and the second exhaust temperature; If it is determined that the refrigerant circulation system is abnormal, controlling the air conditioner to perform a protection operation; The step of determining whether there is an abnormality in the refrigerant circulation system of the air conditioner according to the first exhaust temperature and the second exhaust temperature includes: determining a target exhaust temperature based on the first exhaust temperature and the second exhaust temperature; When the target exhaust temperature is greater than a set temperature threshold, determining that an abnormality exists in the refrigerant circulation system; When the target exhaust temperature is less than or equal to the set temperature threshold, determining that there is no abnormality in the refrigerant circulation system; The set temperature threshold is obtained according to the outdoor fan speed and the compressor motor speed. The greater the outdoor fan speed, the smaller the set temperature threshold, and the greater the motor speed, the greater the set temperature threshold.

2. The air conditioner control method according to claim 1, wherein: The step of determining the target exhaust temperature according to the first exhaust temperature and the second exhaust temperature includes: The maximum value of the first exhaust gas temperature and the second exhaust gas temperature is determined as the target exhaust gas temperature.

3. The air conditioner control method according to claim 1, wherein: After the step of determining that an abnormality exists in the refrigerant circulation system when the target exhaust temperature is greater than a set temperature threshold, the method further includes: If it is determined that the refrigerant circulation system is abnormal, the protection operation is determined according to the temperature range of the target exhaust temperature, and the step of controlling the air conditioner to perform the protection operation is performed.

4. The air conditioner control method according to claim 3, wherein: The step of determining the protection operation according to the temperature range of the target exhaust temperature includes: When the target exhaust temperature is within a first temperature range, determining that the protection operation includes shutting down the compressor; When the target exhaust temperature is within a second temperature range, determining that the protection operation includes reducing the frequency of the compressor; The temperature in the first temperature interval is greater than the temperature in the second temperature interval, and the temperature in the second temperature interval is greater than the set temperature threshold.

5. The air conditioner control method according to claim 4, wherein: After the step of determining that an abnormality exists in the refrigerant circulation system when the target exhaust temperature is greater than a set temperature threshold, the method further includes: If it is determined that there is an abnormality in the refrigerant circulation system, when the target exhaust temperature is within the second temperature range, if the air conditioner meets a preset condition, then the step of determining that the protection operation includes shutting down the compressor is executed; if the air conditioner does not meet the preset condition, then the step of determining that the protection operation includes reducing the frequency of the compressor is executed; The preset conditions include at least one of the following: The first exhaust temperature is greater than a preset exhaust temperature; The temperature difference between the first exhaust temperature and the second exhaust temperature is greater than or equal to a set temperature difference value; The operating current of the compressor is less than a set current value.

6. The air conditioner control method according to claim 4, wherein: The step of determining that the protection operation includes reducing the frequency of the compressor includes: Determining the protection operation includes reducing the frequency of the compressor at a target rate.

7. An air conditioner, characterized in that: The air conditioner comprises: compressor; A control device, the compressor is connected to the control device, the control device includes: a memory, a processor and an air conditioner control program stored in the memory and executable on the processor, 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 6.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a control program for the air conditioner, and when the control program for the air conditioner is executed by the processor, the steps of the control method for the air conditioner according to any one of claims 1 to 6 are implemented.

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