Air conditioner refrigerant state determination method, air conditioner, electronic equipment, storage medium and program product

Abstract

The invention provides a refrigerant state determination method of an air conditioner, the air conditioner, electronic equipment, a storage medium and a program product. Belongs to the technical field of air conditioners. Comprising the steps that the exhaust temperature of the compressor is obtained; in response to the situation that the difference value between the exhaust temperature and the preset target exhaust temperature exceeds the preset range, the opening degree of the main valve is adjusted; when the working frequency of the compressor reaches the target working frequency and the exhaust temperature reaches the target exhaust temperature, the auxiliary valve is opened; in response to the situation that the auxiliary valve is opened to the target opening degree, a new exhaust temperature is obtained; and according to the new exhaust temperature and the target exhaust temperature, the refrigerant state is determined. According to the method, the refrigerant state of the air conditioner is determined under the condition that hardware is not added, and the problem that extra parts or extra refrigerant amount determination operation is needed for determining whether the refrigerant is insufficient or not currently is solved.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning technology, and in particular to a method for determining the refrigerant state of an air conditioner, an air conditioner, electronic equipment, storage medium, and program product. Background Technology

[0002] In related technologies, air conditioners rely on refrigerant circulation for temperature regulation, and insufficient refrigerant will lead to a decrease in temperature regulation capability.

[0003] Currently, determining whether the refrigerant is insufficient requires additional components or additional refrigerant quantity determination procedures. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides an air conditioner, a method, device, storage medium, and program product for determining the refrigerant state of an air conditioner.

[0005] According to a first aspect of the present disclosure, a method for determining the refrigerant state of an air conditioner is provided. The air conditioner includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, an economizer, a main valve, and an auxiliary valve. A first end of the compressor is connected to a first end of the outdoor heat exchanger, a second end of the outdoor heat exchanger is connected to a first end of the economizer, a second end of the economizer is connected to a first end of the main valve and a first end of the auxiliary valve, a second end of the auxiliary valve is connected to a third end of the economizer, a fourth end of the economizer is connected to the compressor's air inlet, a second end of the main valve is connected to a first end of the indoor heat exchanger, and a second end of the indoor heat exchanger is connected to a second end of the compressor. The method includes: acquiring the compressor's discharge temperature; adjusting the opening degree of the main valve in response to the difference between the discharge temperature and a preset target discharge temperature exceeding a predetermined range; opening the auxiliary valve in response to the compressor's operating frequency reaching a target operating frequency and the discharge temperature reaching a target discharge temperature; acquiring a new discharge temperature in response to the auxiliary valve opening to a target opening degree; and determining the refrigerant state based on the new discharge temperature and the target discharge temperature.

[0006] In one possible implementation, the refrigerant state is determined based on the new exhaust temperature and the target exhaust temperature, including: determining the refrigerant state as refrigerant-deficient in response to the new exhaust temperature being greater than the target exhaust temperature.

[0007] In one possible implementation, the refrigerant state includes the refrigerant quantity; determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature includes: subtracting the target exhaust temperature from the new exhaust temperature to obtain a temperature difference; determining the target temperature range based on the temperature difference; and determining the refrigerant quantity by finding the correspondence between the target temperature range and the refrigerant quantity.

[0008] In one possible implementation, after obtaining the temperature difference by subtracting the target exhaust temperature from the new exhaust temperature, the method further includes: acquiring auxiliary parameters; correcting the temperature difference based on the auxiliary parameters to obtain a corrected temperature difference; and determining the refrigerant quantity based on the corrected temperature difference.

[0009] In one possible implementation, the auxiliary parameters include ambient humidity and compressor load current; based on the auxiliary parameters, the temperature difference is corrected to obtain the corrected temperature difference, including: determining the humidity correction amount based on the ambient humidity; determining the load correction amount based on the compressor load current; weighted summing of the humidity correction amount and the load correction amount to obtain the comprehensive correction amount; and determining the corrected temperature difference based on the comprehensive correction amount and the temperature difference.

[0010] In one possible implementation, adjusting the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range includes: decreasing the opening of the main valve in response to the difference between the exhaust temperature and the target exhaust temperature being less than the minimum value of the predetermined range; and increasing the opening of the main valve in response to the difference between the exhaust temperature and the target exhaust temperature being greater than the maximum value of the predetermined range.

[0011] In one possible implementation, the method further includes: obtaining the outer ring temperature; and determining the target operating frequency and target discharge temperature of the compressor based on the outer ring temperature.

[0012] In one possible implementation, the refrigerant status includes the refrigerant quantity; after obtaining the outer ring temperature, it also includes: obtaining the relationship between the temperature difference range corresponding to the outer ring temperature and the refrigerant quantity; subtracting the target exhaust temperature from the new exhaust temperature to obtain the temperature difference; determining the target temperature range based on the temperature difference; and finding the relationship between the temperature difference range and the refrigerant quantity based on the target temperature range to obtain the refrigerant quantity.

[0013] In one possible implementation, opening the auxiliary valve in response to the compressor operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature includes: opening the auxiliary valve at a preset rate in response to the compressor operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature.

[0014] In one possible implementation, before adjusting the main valve opening in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range, the method further includes: acquiring the outdoor heat exchanger temperature and outdoor ambient humidity; determining whether frosting conditions have been met based on the outdoor heat exchanger temperature and outdoor ambient humidity; if frosting conditions have been met, executing a defrosting process; and in response to the completion of the defrosting process, executing the step of adjusting the main valve opening in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range, up to the step of determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature.

[0015] In one possible implementation, after adjusting the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range, the method further includes: subtracting the target exhaust temperature from the new exhaust temperature to obtain the temperature difference; obtaining the outlet air temperature before valve opening and the outlet air temperature after valve opening; determining the outlet air temperature difference based on the outlet air temperature before valve opening and the outlet air temperature after valve opening; and determining heat exchanger blockage or outputting heat exchanger blockage warning information in response to the temperature difference being greater than a preset exhaust temperature difference threshold and the outlet air temperature difference being less than a preset outlet air temperature difference threshold.

[0016] According to a second aspect of the present disclosure, an air conditioner is provided, including a compressor, an indoor heat exchanger, an outdoor heat exchanger, an economizer, a main valve, and an auxiliary valve; a first end of the compressor is connected to a first end of the outdoor heat exchanger, a second end of the outdoor heat exchanger is connected to a first end of the economizer, a second end of the economizer is connected to a first end of the main valve and a first end of the auxiliary valve, a second end of the auxiliary valve is connected to a third end of the economizer, a fourth end of the economizer is connected to a gas inlet of the compressor, a second end of the main valve is connected to a first end of the indoor heat exchanger, and a second end of the indoor heat exchanger is connected to a second end of the compressor; wherein the air conditioner is configured to perform the method described in the first aspect.

[0017] In one possible implementation, the air conditioner further includes: a four-way valve; a first end of the compressor is connected to a first end of the four-way valve, a second end of the four-way valve is connected to a first end of the outdoor heat exchanger, a second end of the indoor heat exchanger is connected to a third end of the four-way valve, and a fourth end of the four-way valve is connected to a second end of the compressor.

[0018] According to a third aspect of the present disclosure, an electronic device is provided, comprising: a processor; and a memory for storing processor-executable instructions; wherein the processor is configured to execute the executable instructions in the memory to implement the steps of the method as described in the first aspect.

[0019] According to a fourth aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, which, when instructions in the storage medium are executed by a processor of a mobile terminal, enables the mobile terminal to perform the method described in the first aspect.

[0020] According to a fifth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the method as described in the first aspect.

[0021] The embodiments of this disclosure provide a method for determining the refrigerant status of an air conditioner, an air conditioner, an electronic device, a storage medium, and a program product. By acquiring the compressor's exhaust temperature, after the compressor's operating frequency reaches the target operating frequency, the auxiliary valve is opened, and the refrigerant status is determined based on the new exhaust temperature and the target exhaust temperature. Finally, the refrigerant status is output, enabling the determination of the air conditioner's refrigerant status without adding hardware, and allowing users to intuitively understand the current refrigerant status, facilitating timely refrigerant replenishment.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0024] Figure 1 This is a schematic diagram of the structure of an air conditioner according to an embodiment of this disclosure;

[0025] Figure 2 A flowchart illustrating the method for determining the refrigerant state of an air conditioner provided in this application embodiment;

[0026] Figure 3 This is a schematic diagram of the structure of another air conditioner provided in an embodiment of this disclosure;

[0027] Figure 4 A schematic diagram of the refrigerant state determination device for an air conditioner provided in an embodiment of this application.

[0028] Figure Labels

[0029] 100-Air Conditioner;

[0030] 101 - Compressor;

[0031] 102 - Indoor heat exchanger;

[0032] 103 - Outdoor heat exchanger;

[0033] 104-Economy Instrument;

[0034] 105 - Main valve;

[0035] 106-Auxiliary valve;

[0036] 107 - First temperature sensor;

[0037] 108 - Second temperature sensor;

[0038] 109 - Third temperature sensor;

[0039] 110-Humidity Sensor

[0040] 111 - Fourth temperature sensor;

[0041] 112 - Four-way valve;

[0042] 113 - Filter. Detailed Implementation

[0043] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0044] The embodiments described in the following examples of this disclosure are not representative of all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0045] During the temperature control process, air conditioners require refrigerant to exchange heat between heat exchangers. If the refrigerant content is insufficient, the air conditioner's temperature control capability will decrease.

[0046] To address the aforementioned technical problems, the inventors proposed the following technical concept: First, determine the target operating frequency and target discharge temperature of the compressor. Then, use the main valve to control the compressor's operating frequency and discharge temperature to achieve the target operating frequency and target discharge temperature. Next, open the auxiliary valve. When the refrigerant content is insufficient, the compressor's discharge temperature will rise abnormally. Based on the difference between the compressor's discharge temperature and the target discharge temperature, determine the amount of refrigerant remaining.

[0047] Figure 1 This is a schematic diagram illustrating the structure of an air conditioner according to some embodiments of the present disclosure. Figure 1 As shown, the air conditioner 100 includes: a compressor 101, an indoor heat exchanger 102, an outdoor heat exchanger 103, an economizer 104, a main valve 105, and an auxiliary valve 106.

[0048] Among them, the economizer 104 can be a plate economizer, a flash economizer, etc., and the main valve 105 and the auxiliary valve 106 can be electronic expansion valves.

[0049] The first end of the compressor is connected to the first end of the outdoor heat exchanger, the second end of the outdoor heat exchanger is connected to the first end of the economizer, the second end of the economizer is connected to the first end of the main valve and the first end of the auxiliary valve, the second end of the auxiliary valve is connected to the third end of the economizer, the fourth end of the economizer is connected to the compressor's air inlet, the second end of the main valve is connected to the first end of the indoor heat exchanger, and the second end of the indoor heat exchanger is connected to the second end of the compressor.

[0050] Figure 2 This is a flowchart illustrating the method for determining the refrigerant state of an air conditioner provided in an embodiment of this application. Figure 2 As shown, the method for determining the refrigerant state includes:

[0051] S201: Obtain the compressor's discharge temperature.

[0052] In this step, the compressor's exhaust temperature, collected by the temperature sensor, can be obtained by receiving the electrical signal sent by the temperature sensor.

[0053] S202: In response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding the predetermined range, adjust the opening of the main valve.

[0054] In this step, when the compressor's operating frequency reaches the preset target operating frequency, the exhaust temperature and the target exhaust temperature can be input into the preset PID algorithm to obtain the main valve opening adjustment range output by the PID algorithm. The opening of the auxiliary valve is adjusted according to the main valve adjustment range until the compressor's operating frequency reaches the target operating frequency.

[0055] S203: In response to the compressor's operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature, the auxiliary valve is opened.

[0056] In this step, in response to the compressor's operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature, an electrical signal corresponding to the opening of the auxiliary valve is input, causing the auxiliary valve to open. During the opening of the auxiliary valve, the compressor's operating frequency, the opening degree of the main valve, and the rotation speed of the internal and external fans can remain unchanged.

[0057] S204: In response to the auxiliary valve opening to the target opening degree, a new exhaust temperature is obtained.

[0058] In this step, the target opening degree can be a degree preset by the operator based on experimental data or empirical parameters. Similarly, the new exhaust temperature can be obtained by using a temperature sensor to collect the compressor's exhaust temperature.

[0059] S205: Determine the refrigerant status based on the new exhaust temperature and the target exhaust temperature.

[0060] In this step, the relationship between the new exhaust temperature and the target exhaust temperature can be used to determine if there is a refrigerant shortage. Alternatively, the difference between the exhaust temperature and the target exhaust temperature can be calculated, and a preset correspondence can be found based on the difference to obtain the corresponding refrigerant status.

[0061] For example, if the new exhaust temperature is less than or equal to the target exhaust temperature, it is determined that there is no shortage of refrigerant; if the new exhaust temperature is greater than the target exhaust temperature, it is determined that there is a shortage of refrigerant.

[0062] As can be seen from the description of the above embodiments, the present disclosure embodiments obtain the compressor's exhaust temperature, and after the compressor's operating frequency reaches the target operating frequency and the difference between the exhaust temperature and the target exhaust temperature stabilizes within a predetermined range, the auxiliary valve is opened, and the refrigerant status is determined based on the new exhaust temperature and the target exhaust temperature. Finally, the refrigerant status is output, thus realizing the determination of the air conditioning refrigerant status without adding hardware, and without using additional components or operations to determine whether refrigerant is lacking.

[0063] In one possible implementation, after determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature in step S205, the method further includes: S206: Outputting the refrigerant state.

[0064] In one possible implementation, step S205 above, determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature, includes:

[0065] S205A1: In response to a new exhaust temperature exceeding the target exhaust temperature, the refrigerant status is determined to be refrigerant shortage.

[0066] In this step, for example, if the new exhaust temperature is 80°C and the target exhaust temperature is 77°C, then the refrigerant shortage is determined to be a refrigerant shortage state; or, for example, if the new exhaust temperature is 75°C and the target exhaust temperature is 80°C, then the refrigerant shortage is determined to be a refrigerant shortage state.

[0067] As can be seen from the description of the above embodiments, the embodiments of this disclosure obtain the refrigerant state by comparing the new exhaust temperature and the target exhaust temperature, realizing the determination of the refrigerant state without additional components and operating procedures, reducing the hardware or operations required to determine the refrigerant state, and reducing the manufacturing cost of air conditioners or the operating procedures for determining the refrigerant state.

[0068] In one possible implementation, the refrigerant state includes the refrigerant quantity; in step S205 above, determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature includes:

[0069] S205B1: The temperature difference is obtained by subtracting the target exhaust temperature from the new exhaust temperature.

[0070] In this step, for example, if the new exhaust temperature is 80℃ and the target exhaust temperature is 75℃, the temperature difference is 5℃. Or, for example, if the new exhaust temperature is 77℃ and the target exhaust temperature is 80℃, the temperature difference is -3℃.

[0071] S205B2: Determine the target temperature range based on the temperature difference.

[0072] In this step, the temperature range in which the minimum value of any temperature range is less than the temperature difference and the maximum value of any temperature range is greater than the temperature difference is determined as the target temperature range.

[0073] For example, if the temperature difference is 5℃ and the temperature range is "[3℃, 5℃]", then "[3℃, 5℃]" is the target temperature range. As another example, if the temperature difference is 7℃ and the temperature range is "[5℃, 10℃]", then "[5℃, 10℃]" is the target temperature range.

[0074] S205B3: Based on the target temperature range, find the correspondence between the refrigerant quantity and the refrigerant quantity, and determine the refrigerant quantity.

[0075] In this step, the preset correspondence between temperature difference range and refrigerant quantity can be found to obtain the refrigerant quantity. This correspondence between temperature difference range and refrigerant quantity can be preset by staff and stored in formats such as tables, key-value pairs, or strings.

[0076] Among the relationships between temperature difference range and refrigerant quantity, the larger the temperature difference range, the smaller the corresponding refrigerant quantity.

[0077] In this step, because the refrigerant in the economizer's gas supply circuit is separated after the auxiliary valve is opened, the refrigerant in the main circuit is further reduced, thus further reducing the amount of refrigerant entering the main valve. The refrigerant evaporates more thoroughly in the heat exchanger, and the temperature of the gas entering the compressor increases. At the same time, if the refrigerant in the system is insufficient, the amount of refrigerant entering the economizer is also insufficient, causing the economizer to be unable to exchange heat effectively. This further increases the temperature of the gas that is not as good as the compressor, thus increasing the temperature difference. Therefore, based on the temperature difference, the preset correspondence between the temperature difference and the refrigerant quantity can be found to obtain the corresponding refrigerant quantity.

[0078] As can be seen from the description of the above embodiments, the embodiments of this disclosure calculate the temperature difference, determine the temperature range based on the temperature difference, and obtain the refrigerant quantity by finding the corresponding relationship based on the temperature range, thereby achieving accurate determination of the refrigerant quantity.

[0079] In one possible implementation, after determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature in step S205, the method further includes:

[0080] S220: Obtain auxiliary parameters.

[0081] In this step, auxiliary parameters may include data such as ambient humidity and compressor load current.

[0082] S221: Based on the auxiliary parameters, correct the temperature difference to obtain the corrected temperature difference.

[0083] This step can include using auxiliary parameters to determine the temperature difference correction amount, combining the temperature difference correction amount with the temperature difference value to obtain the corrected temperature difference value. Alternatively, the auxiliary parameters and the temperature difference value can be weighted and summed to obtain the corrected temperature difference value. Another option is to input the auxiliary parameters into a pre-trained neural network model to obtain the correction amount, and then use this correction amount to correct the temperature difference value to obtain the corrected temperature difference value.

[0084] S222: Determine the refrigerant stock based on the corrected temperature difference.

[0085] This step is similar to step S2052 above, and will not be repeated here.

[0086] As can be seen from the description of the above embodiments, the embodiments of this disclosure obtain auxiliary parameters and use the auxiliary parameters to correct the temperature difference to obtain a corrected temperature difference. The refrigerant quantity is then determined based on the corrected temperature difference, thereby reducing the influence of the external environment on the accuracy of the refrigerant state and increasing the accuracy of the obtained refrigerant quantity.

[0087] In one possible implementation, auxiliary parameters include: ambient humidity and compressor load current.

[0088] In step S221 above, the temperature difference is corrected based on auxiliary parameters to obtain the corrected temperature difference, including:

[0089] S2211: Determine the humidity correction amount based on the ambient humidity.

[0090] In this step, you can find the preset relationship between humidity and humidity correction amount based on the ambient humidity to obtain the humidity correction amount. Alternatively, you can multiply the ambient humidity by a preset coefficient to obtain the humidity correction amount.

[0091] S2212: Determine the load correction amount based on the compressor load current.

[0092] This step is similar to step S2211 above, and will not be repeated here.

[0093] S2213: The humidity correction and load correction are weighted and summed to obtain the comprehensive correction.

[0094] In this step, the weights of the humidity correction and load correction can be preset by the staff based on the experimental data.

[0095] S2214: Determine the corrected temperature difference based on the comprehensive correction amount and the temperature difference.

[0096] This step involves adding or subtracting the overall correction amount from the temperature difference to obtain the corrected temperature difference.

[0097] As can be seen from the description of the above embodiments, the embodiments of this disclosure determine the correction amount based on the ambient humidity and the compressor load current respectively, and then weight and sum the two correction amounts to obtain the comprehensive correction amount. Combining the comprehensive correction amount and the temperature difference, the corrected temperature difference is obtained. This realizes the correction of the temperature difference by combining the ambient humidity and the compressor load current, avoiding the influence of ambient humidity and compressor status on the temperature difference, thereby increasing the accuracy of the obtained refrigerant status.

[0098] In one possible implementation, in step S202 above, adjusting the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range includes:

[0099] S2021: In response to the difference between the exhaust temperature and the target exhaust temperature being less than the minimum value of a predetermined range, the opening of the main valve is reduced.

[0100] In this step, the difference can be obtained. If the difference is less than the minimum value of a predetermined range, the exhaust temperature is subtracted from the target exhaust temperature, and the opening of the main valve is reduced by a preset degree. Alternatively, the difference between the exhaust temperature and the target exhaust temperature can be input into a PID program to obtain the main valve opening control signal output by the PID program. This main valve opening control signal is then input into the main valve to reduce its opening by the corresponding degree.

[0101] For example, if the difference is 2 and the predetermined range is 3 to 5, the main valve opening will be reduced because the difference is less than the minimum value of the predetermined range. As another example, if the difference is 1 and the predetermined range is 2 to 4, the main valve opening will be reduced because the difference is less than the minimum value of the predetermined range.

[0102] S2022: In response to the difference between the exhaust temperature and the target exhaust temperature being greater than the maximum value of a predetermined range, the opening degree of the main valve is increased.

[0103] This step is similar to step S2021 above, and will not be repeated here.

[0104] As can be seen from the description of the above embodiments, in this embodiment, after the compressor's operating frequency reaches the target operating frequency, the difference between the exhaust temperature and the target exhaust temperature is calculated. Based on the relationship between the difference and a predetermined range, the opening degree of the main valve is controlled accordingly, so that the exhaust temperature gradually approaches the target exhaust temperature and gradually stabilizes at the target exhaust temperature, providing a basis for subsequently opening the auxiliary valve and judging the refrigerant status.

[0105] Figure 3 This is a schematic diagram of another air conditioner provided as an embodiment of this disclosure. (See attached diagram.) Figure 3 As shown, the air conditioner also includes a first temperature sensor 107, a second temperature sensor 108, a third temperature sensor 109, a humidity sensor 110, a fourth temperature sensor 111, and a four-way valve 112.

[0106] The first temperature sensor is installed at the first end of the compressor to collect the compressor's exhaust temperature; the second temperature sensor is installed outdoors to collect the ambient temperature; the third temperature sensor is installed on the tube wall surface of the outdoor heat exchanger to collect the outdoor heat exchanger temperature; the humidity sensor is installed outdoors to collect the outdoor ambient humidity; and the fourth temperature sensor is installed in the air outlet direction of the indoor or outdoor heat exchanger to obtain the outdoor heat exchanger outlet temperature before the auxiliary valve is opened and the outdoor heat exchanger outlet temperature after the auxiliary valve is opened.

[0107] The first end of the compressor is connected to the first end of the four-way valve, the second end of the four-way valve is connected to the first end of the outdoor heat exchanger, the second end of the indoor heat exchanger is connected to the third end of the four-way valve, and the fourth end of the four-way valve is connected to the second end of the compressor.

[0108] In cooling mode, the first and third terminals of the four-way valve are the input terminals, and the second and fourth terminals are the output terminals. In heating mode, the first and second terminals of the four-way valve are the input terminals, and the third and fourth terminals are the output terminals. The first and second terminals of the economizer are connected, and the third and fourth terminals are connected.

[0109] Temperature sensors can be thermocouple temperature sensors, thermistor temperature sensors, etc.

[0110] In one possible implementation, step S201 above, which determines the target operating frequency and target discharge temperature of the compressor, includes:

[0111] S2011: Obtain the outer ring temperature.

[0112] In this step, a second temperature sensor can be used to collect the outer ring temperature. Specifically, the outer ring temperature can be obtained by receiving the electrical signal from the second temperature sensor.

[0113] S2012: Determine the target operating frequency and target discharge temperature of the compressor based on the outer ring temperature.

[0114] In this step, the target operating frequency and target exhaust temperature can be obtained by finding the preset correspondence between the outer ring temperature and the operating frequency and exhaust temperature based on the outer ring temperature. Alternatively, the outer ring temperature can be input into the PID algorithm to obtain the target operating frequency and target exhaust temperature output by the PID algorithm.

[0115] As can be seen from the description of the above embodiments, the embodiments of this disclosure obtain the external ambient temperature through a temperature sensor, and then determine a suitable operating frequency and exhaust temperature based on the external ambient temperature, so that the compressor has a suitable output target.

[0116] In one possible implementation, the refrigerant state includes the refrigerant quantity; after obtaining the outer ring temperature in step S2011 above, the method further includes:

[0117] S230: Obtain the relationship between the temperature difference range corresponding to the outer ring temperature and the refrigerant quantity.

[0118] In this step, the corresponding temperature difference range and refrigerant quantity used in step S522 are read by using the outer ring temperature. This allows for obtaining different correspondences based on different outer ring temperatures, thus making the final determined refrigerant quantity more accurate.

[0119] S231: The temperature difference is obtained by subtracting the target exhaust temperature from the new exhaust temperature.

[0120] This step is similar to step S205B1 above, and will not be repeated here.

[0121] S232: Determine the target temperature range based on the temperature difference.

[0122] This step is similar to step S521 above, and will not be repeated here.

[0123] S233: Based on the target temperature range, find the correspondence between the temperature difference range and the refrigerant quantity to obtain the refrigerant quantity.

[0124] This step is similar to step S522 above, and will not be repeated here.

[0125] As can be seen from the description of the above embodiments, the embodiments of this disclosure obtain the correspondence between the temperature difference range corresponding to the outer ring temperature and the refrigerant quantity, so that the correspondence is more consistent with the current outdoor ambient temperature, increases the accuracy of the correspondence, and thus makes the final determined refrigerant quantity more accurate.

[0126] In one possible implementation, in step S203 above, opening the auxiliary valve in response to the compressor's operating frequency reaching the target operating frequency and the discharge temperature reaching the target discharge temperature includes:

[0127] S2031: In response to the compressor's operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature, the auxiliary valve is opened at a preset rate.

[0128] In this step, once the compressor's operating frequency reaches the target operating rate and the exhaust temperature reaches the target exhaust temperature, the air conditioner is in a stable operating state. At this time, opening the auxiliary valve can indicate whether the refrigerant quantity is sufficient, while avoiding risks such as compressor surge and liquid slugging.

[0129] The preset rate can be a rate determined by the staff based on experimental data.

[0130] As can be seen from the description of the above embodiments, the present disclosure embodiments, by opening the auxiliary valve at a preset rate when the compressor's operating frequency reaches the target operating frequency and the discharge temperature reaches the target discharge temperature, can reflect the impact of the economizer on the compressor's discharge temperature during operation, thereby truly reflecting the state of the refrigerant. Furthermore, opening the auxiliary valve at a preset rate can prevent malfunctions caused by sudden changes in refrigerant quantity and system pressure.

[0131] In one possible implementation, before step S202 adjusts the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range, the method further includes:

[0132] S240: Obtain the outdoor heat exchanger temperature and outdoor ambient humidity.

[0133] In this step, the outdoor heat exchanger temperature and outdoor ambient humidity can be obtained by receiving electrical signals from the third temperature sensor and the humidity sensor.

[0134] S241: Determine whether the conditions for frosting have been met based on the outdoor heat exchanger temperature and the outdoor ambient humidity.

[0135] In this step, the frosting conditions can be preset by the staff; for example, if the outdoor heat exchanger temperature is lower than a preset first temperature threshold and the outdoor ambient temperature is higher than a preset first humidity threshold, then the frosting conditions are determined to be met; or if the outdoor heat exchanger temperature is lower than a preset second temperature threshold and the outdoor ambient temperature is higher than a preset second humidity threshold, then the frosting conditions are determined to be met, wherein the second temperature threshold is lower than the first temperature threshold and the second humidity threshold is higher than the first humidity threshold.

[0136] For example, if the outdoor heat exchanger temperature is less than 0°C and the ambient humidity is greater than 55% when the air conditioner is in heating mode, then the conditions for frosting are considered to have been met.

[0137] S242: If the frosting conditions are met, then execute the defrosting process.

[0138] In this step, the compressor output can be connected to the outdoor heat exchanger by switching the first and second ends of the four-way valve. This allows the hot refrigerant output by the compressor to be introduced into the outdoor heat exchanger, raising its temperature and thus defrosting.

[0139] S243: In response to the completion of the defrosting process, perform the steps of adjusting the opening of the main valve according to the exhaust temperature and the target exhaust temperature, and then determine the refrigerant status according to the new exhaust temperature and the target exhaust temperature.

[0140] In this step, the step of adjusting the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding the predetermined range can be the step S202 above, and the step of determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature can be the step S205 above.

[0141] As can be seen from the description of the above embodiments, the embodiments of this disclosure obtain the outdoor heat exchanger temperature and outdoor ambient humidity, determine whether defrosting is required based on the outdoor heat exchanger temperature and outdoor ambient humidity, avoid the abnormal rise in compressor outlet temperature caused by the frosting state, and perform the process of determining the refrigerant state again after the defrosting process is completed.

[0142] In one possible implementation, after step S202 adjusts the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range, the method further includes steps S250 to S253A, or steps S250 to S253B.

[0143] S250: The temperature difference is obtained by subtracting the target exhaust temperature from the new exhaust temperature.

[0144] This step is similar to step S205B1 above, and will not be repeated here.

[0145] S251: Obtain the outlet air temperature before valve opening and the outlet air temperature after valve opening.

[0146] In this step, the outlet air temperature before and after valve opening can also be obtained by receiving the electrical signal from the fourth temperature sensor. The outlet air temperature before valve opening can be collected after step S203 is completed, and the outlet air temperature after valve opening can be collected after step S204 is completed.

[0147] S252: Determine the outlet air temperature difference based on the outlet air temperature before and after the valve is opened.

[0148] In this step, the difference between the outlet air temperature before and after the valve is opened is calculated to obtain the outlet air temperature difference.

[0149] The air outlet temperature before development can be the air outlet temperature of the indoor or outdoor heat exchanger before the auxiliary valve is opened, and the air outlet temperature after the valve is opened can be the air outlet temperature of the indoor or outdoor heat exchanger after the auxiliary valve is opened.

[0150] S253A: If the temperature difference is greater than the preset exhaust temperature difference threshold and the outlet air temperature difference is less than the preset outlet air temperature difference threshold, then the heat exchanger is determined to be clogged.

[0151] In this step, the exhaust temperature difference threshold and the outlet air temperature difference threshold can be preset by the staff based on experimental data.

[0152] S253B: Determines heat exchanger blockage and outputs a heat exchanger blockage warning message.

[0153] In this step, the heat exchanger clogging warning message can be displayed or sent to the user terminal.

[0154] As can be seen from the description of the above embodiments, the embodiments of this disclosure obtain a temperature difference by adopting a new exhaust temperature and a target exhaust temperature, and obtain the outlet air temperature of the heat exchanger before and after opening the auxiliary valve. Based on the difference in outlet air temperature, it is determined whether the heat exchanger is dirty or clogged, so as to avoid abnormally high compressor outlet air temperature and misjudgment of refrigerant status when the heat exchanger is dirty or clogged.

[0155] In one possible implementation, such as Figure 3 As shown, the air conditioner also includes a filter 113, which is installed on both sides of the main valve.

[0156] Figure 4 A schematic diagram of the refrigerant state determination device for an air conditioner provided in an embodiment of this application. Figure 4 As shown, the refrigerant state determination device 400 for air conditioning is applied to the air conditioner in any of the above embodiments, and includes: a temperature acquisition module 401, an opening degree adjustment module 402, an auxiliary valve control module 403, a temperature acquisition module 404, and a state determination module 405.

[0157] Temperature acquisition module 401 is used to acquire the exhaust temperature of the compressor.

[0158] The opening adjustment module 402 is used to adjust the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range.

[0159] The auxiliary valve control module 403 is used to open the auxiliary valve in response to the compressor's operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature.

[0160] Temperature acquisition module 404 is used to acquire new exhaust temperature in response to the auxiliary valve opening to the target opening degree.

[0161] The status determination module 405 is used to determine the refrigerant status based on the new exhaust temperature and the target exhaust temperature.

[0162] In one possible implementation, the state determination module 405 determines that the refrigerant state is short of refrigerant in response to a new exhaust temperature being greater than the target exhaust temperature.

[0163] In one possible implementation, the refrigerant status includes the refrigerant quantity. The status determination module 405 is used to subtract the target exhaust temperature from the new exhaust temperature to obtain a temperature difference. Based on the temperature difference, a target temperature range is determined. Based on the target temperature range, a correspondence between the refrigerant quantity and the refrigerant quantity is found to determine the refrigerant quantity.

[0164] In one possible implementation, the state determination module 405 is also used to acquire auxiliary parameters. Based on the auxiliary parameters, the temperature difference is corrected to obtain a corrected temperature difference. Based on the corrected temperature difference, the refrigerant quantity is determined.

[0165] In one possible implementation, auxiliary parameters include ambient humidity and compressor load current. The state determination module 405 is used to determine a humidity correction amount based on the ambient humidity. It also determines a load correction amount based on the compressor load current. The humidity correction amount and the load correction amount are weighted and summed to obtain a comprehensive correction amount. Finally, the corrected temperature difference is determined based on the comprehensive correction amount and the temperature difference.

[0166] In one possible implementation, the opening adjustment module 402 is used to decrease the opening of the main valve in response to the difference between the exhaust temperature and the target exhaust temperature being less than the minimum value of a predetermined range, and to increase the opening of the main valve in response to the difference between the exhaust temperature and the target exhaust temperature being greater than the maximum value of a predetermined range.

[0167] In one possible implementation, the refrigerant state determination device 400 further includes a target determination module 406. The target determination module 406 is used to acquire the outer ring temperature. Based on the outer ring temperature, it determines the target operating frequency and target discharge temperature of the compressor.

[0168] In one possible implementation, the refrigerant status includes the refrigerant quantity. The status determination module 405 is also used to obtain the correspondence between the temperature difference range corresponding to the outer ring temperature and the refrigerant quantity. The temperature difference is obtained by subtracting the target exhaust temperature from the new exhaust temperature. Based on the temperature difference, the target temperature range is determined. Based on the target temperature range, the correspondence between the temperature difference range and the refrigerant quantity is found to obtain the refrigerant quantity.

[0169] In one possible implementation, the auxiliary valve control module 403 is used to open the auxiliary valve at a preset rate in response to the compressor's operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature.

[0170] In one possible implementation, the refrigerant state determination device 400 further includes an outdoor unit defrosting module 407. The outdoor unit defrosting module 407 is used to acquire the outdoor heat exchanger temperature and outdoor ambient humidity. Based on the outdoor heat exchanger temperature and outdoor ambient humidity, it determines whether frosting conditions have been met. If frosting conditions are met, the defrosting process is executed. In response to the completion of the defrosting process, the step of adjusting the opening of the main valve according to the exhaust temperature and target exhaust temperature is executed to output the refrigerant state.

[0171] In one possible implementation, the refrigerant state determination device 400 further includes a dirt / clogging warning module 408. The dirt / clogging warning module 408 is used to obtain a temperature difference value by subtracting the target exhaust temperature from the new exhaust temperature. It acquires the pre-valve-opening outlet air temperature collected by the fourth temperature sensor before the auxiliary valve opens and the post-valve-opening outlet air temperature collected after the auxiliary valve opens. Based on the pre-valve-opening outlet air temperature and the post-valve-opening outlet air temperature, it determines the outlet air temperature difference. In response to a temperature difference value greater than a preset exhaust temperature difference threshold and an outlet air temperature difference less than a preset outlet air temperature difference threshold, it determines that the heat exchanger is dirty / clogging, or determines that the heat exchanger is dirty / clogging and outputs heat exchanger dirt / clogging warning information.

[0172] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0173] A non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by the processor of a mobile terminal, enables the mobile terminal to execute a refrigerant state determination method for an air conditioner according to any of the above embodiments.

[0174] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0175] In the above detailed description, reference has been made to the accompanying drawings, which illustrate specific aspects of this disclosure by way of illustration. In this regard, terms indicating direction or positional relationship, such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential,” are used with reference to the orientation of the described figures. Since components of the described device can be positioned in multiple different orientations, directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of this disclosure. Therefore, the following detailed description should not be considered limiting.

[0176] It should be understood that, unless otherwise expressly specified and limited, the terms "joining," "attaching," "installing," "connecting," "linking," "fixing," etc., used in the embodiments of this disclosure should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms herein based on the specific circumstances.

[0177] Furthermore, the term "above" as used herein with respect to components, elements, or material layers formed or located "above" a surface may be used to indicate that the component, element, or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are arranged between the surface and the component, element, or material layer. However, the term "above" as used with respect to components, elements, or material layers formed or located "above" a surface may also optionally have a specific meaning: that the component, element, or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, for example, in direct contact with the surface.

[0178] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0179] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0180] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0181] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0182] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0183] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A method for determining the refrigerant state of an air conditioner, characterized in that, The air conditioner includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, an economizer, a main valve, and an auxiliary valve; a first end of the compressor is connected to a first end of the outdoor heat exchanger, a second end of the outdoor heat exchanger is connected to a first end of the economizer, a second end of the economizer is connected to a first end of the main valve and a first end of the auxiliary valve, a second end of the auxiliary valve is connected to a third end of the economizer, a fourth end of the economizer is connected to the compressor's air inlet, a second end of the main valve is connected to a first end of the indoor heat exchanger, and a second end of the indoor heat exchanger is connected to a second end of the compressor; the method includes: Obtain the exhaust temperature of the compressor; In response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range, the opening of the main valve is adjusted; In response to the compressor's operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature, the auxiliary valve is opened; In response to the auxiliary valve opening to the target opening degree, a new exhaust temperature is obtained; The refrigerant state is determined based on the new exhaust temperature and the target exhaust temperature.

2. The method according to claim 1, characterized in that, The step of determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature includes: In response to the new exhaust temperature being greater than the target exhaust temperature, the refrigerant state is determined to be refrigerant-deficient.

3. The method according to claim 1, characterized in that, The refrigerant status includes the refrigerant quantity; The step of determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature includes: The temperature difference is obtained by subtracting the target exhaust temperature from the new exhaust temperature. Based on the temperature difference, determine the target temperature range; The refrigerant quantity is determined by finding the correspondence between the target temperature range and the refrigerant quantity.

4. The method according to claim 3, characterized in that, After obtaining the temperature difference by subtracting the target exhaust temperature from the new exhaust temperature, the method further includes: Obtain auxiliary parameters; Based on the auxiliary parameters, the temperature difference value is corrected to obtain the corrected temperature difference value; Based on the corrected temperature difference, determine the refrigerant stock level.

5. The method according to claim 4, characterized in that, The auxiliary parameters include ambient humidity and compressor load current; The step of correcting the temperature difference value based on the auxiliary parameters to obtain the corrected temperature difference value includes: Determine the humidity correction amount based on the ambient humidity; Determine the load correction amount based on the compressor load current; The humidity correction and the load correction are weighted and summed to obtain the comprehensive correction. The corrected temperature difference is determined based on the comprehensive correction amount and the temperature difference.

6. The method according to claim 1, characterized in that, The step of adjusting the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range includes: In response to the fact that the difference between the exhaust temperature and the target exhaust temperature is less than the minimum value of the predetermined range, the opening of the main valve is reduced; In response to the difference between the exhaust temperature and the target exhaust temperature being greater than the maximum value of the predetermined range, the opening degree of the main valve is increased.

7. The method according to claim 1, characterized in that, The method further includes: Obtain the outer ring temperature; Based on the outer ring temperature, the target operating frequency and the target exhaust temperature of the compressor are determined.

8. The method according to claim 7, characterized in that, The refrigerant status includes the refrigerant quantity; After obtaining the outer ring temperature, the method further includes: Obtain the relationship between the temperature difference range corresponding to the outer ring temperature and the refrigerant quantity; The temperature difference is obtained by subtracting the target exhaust temperature from the new exhaust temperature. Based on the temperature difference, determine the target temperature range; Based on the target temperature range, the correspondence between the temperature difference range and the refrigerant quantity is found to obtain the refrigerant quantity.

9. The method according to claim 1, characterized in that, The step of opening the auxiliary valve in response to the compressor's operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature includes: In response to the compressor's operating frequency reaching the target operating frequency and the exhaust temperature reaching the target exhaust temperature, the auxiliary valve is opened at a preset rate.

10. The method according to any one of claims 1 to 9, characterized in that, Before adjusting the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range, the method further includes: Obtain the outdoor heat exchanger temperature and outdoor ambient humidity; Determine whether the conditions for frosting have been met based on the outdoor heat exchanger temperature and the outdoor ambient humidity. If the aforementioned frosting conditions are met, then the defrosting process is executed; In response to the completion of the defrosting process, the step of adjusting the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range is performed, followed by the step of determining the refrigerant state based on the new exhaust temperature and the target exhaust temperature.

11. The method according to any one of claims 1 to 10, characterized in that, After adjusting the opening of the main valve in response to the difference between the exhaust temperature and the preset target exhaust temperature exceeding a predetermined range, the method further includes: The temperature difference is obtained by subtracting the target exhaust temperature from the new exhaust temperature. Obtain the outlet air temperature before valve opening and the outlet air temperature after valve opening; The outlet air temperature difference is determined based on the outlet air temperature before valve opening and the outlet air temperature after valve opening. In response to the temperature difference being greater than a preset exhaust temperature difference threshold and the outlet air temperature difference being less than a preset outlet air temperature difference threshold, the system determines that the heat exchanger is clogged, or determines that the heat exchanger is clogged and outputs a heat exchanger clogged warning message.

12. An air conditioner, characterized in that, The air conditioner includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, an economizer, a main valve, and an auxiliary valve; a first end of the compressor is connected to a first end of the outdoor heat exchanger, a second end of the outdoor heat exchanger is connected to a first end of the economizer, a second end of the economizer is connected to a first end of the main valve and a first end of the auxiliary valve, a second end of the auxiliary valve is connected to a third end of the economizer, a fourth end of the economizer is connected to the compressor's air inlet, a second end of the main valve is connected to a first end of the indoor heat exchanger, and a second end of the indoor heat exchanger is connected to a second end of the compressor; wherein the air conditioner is configured to perform the method according to any one of claims 1-11.

13. The air conditioner according to claim 12, characterized in that, The air conditioner also includes: a four-way valve; The first end of the compressor is connected to the first end of the four-way valve, the second end of the four-way valve is connected to the first end of the outdoor heat exchanger, the second end of the indoor heat exchanger is connected to the third end of the four-way valve, and the fourth end of the four-way valve is connected to the second end of the compressor.

14. An electronic device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to execute the executable instructions in the memory to implement the steps of the method according to any one of claims 1 to 11.

15. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the mobile terminal, the mobile terminal is able to perform the method as described in any one of claims 1 to 11.

16. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 11.

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