Air conditioner and control method and device thereof, storage medium and computer program product

Abstract

The invention discloses an air conditioner, a control method and device of the air conditioner, a storage medium and a computer program product. The method comprises the steps that under the condition that the air conditioner runs in a heating mode after being started, the temperature and humidity of the outdoor environment of the air conditioner are calculated according to the temperature and humidity of the outdoor environment of the air conditioner; the control condition for determining whether the air conditioner needs to enter the defrosting mode is a first condition or a second condition; whether the air conditioner needs to enter the defrosting mode or not is determined by combining the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor based on the control condition whether the air conditioner needs to enter the defrosting mode or not; if it is determined that the air conditioner needs to enter the defrosting mode, the air conditioner is controlled to enter the defrosting mode. According to the scheme, whether the air conditioner needs to be defrosted or not is judged by combining the outdoor environment temperature and humidity, the outdoor unit heat exchanger coil temperature, the indoor unit heat exchanger coil temperature and the compressor exhaust temperature, the air conditioner is defrosted thoroughly, the defrosting effect of the outdoor unit heat exchanger is improved, and the heating effect of the air conditioner is improved.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to an air conditioning control method, device, air conditioner, storage medium, and computer program product, and particularly to an air conditioning defrosting control method, device, air conditioner, storage medium, and computer program product. Background Technology

[0002] During the heating process, when the outdoor unit's heat exchanger reaches certain conditions, frost will form. This frost increases the heat exchanger's thermal resistance, affecting its heat exchange efficiency. Defrosting is usually necessary to restore its effectiveness. However, some defrosting control methods in existing air conditioning systems may result in incomplete defrosting, severely impacting the defrosting performance of the outdoor unit's heat exchanger and consequently affecting the air conditioner's heating performance.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide an air conditioner control method, device, air conditioner, storage medium, and computer program product to solve the problem that in some related air conditioner defrosting control methods, incomplete defrosting can seriously affect the defrosting effect of the outdoor unit heat exchanger, thereby severely impacting the air conditioner's heating performance. The invention aims to determine whether the air conditioner needs defrosting by combining outdoor ambient temperature and humidity, outdoor unit heat exchanger coil temperature, indoor unit heat exchanger coil temperature, and compressor exhaust temperature, thereby ensuring thorough defrosting, improving the outdoor unit heat exchanger's defrosting effect, and ultimately enhancing the air conditioner's heating performance.

[0005] This invention provides a control method for an air conditioner, the air conditioner comprising a compressor, an outdoor unit heat exchanger, and an indoor unit heat exchanger; the control method comprising: when the air conditioner is turned on and operating in heating mode, acquiring the outdoor ambient temperature, the outdoor ambient humidity, the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the discharge temperature of the compressor; determining, based on the outdoor ambient temperature and the outdoor ambient humidity, whether the air conditioner needs to enter defrost mode as a first condition or a second condition; based on the control condition for whether the air conditioner needs to enter defrost mode, and in conjunction with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the discharge temperature of the compressor, determining whether the air conditioner needs to enter defrost mode; if it is determined that the air conditioner needs to enter defrost mode, controlling the air conditioner to enter defrost mode.

[0006] In some implementations, the first condition is to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger; the second condition is to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and the pipe temperature of the outdoor unit heat exchanger; the control condition for determining whether the air conditioner needs to enter defrost mode is the first or second condition based on the outdoor ambient temperature and the outdoor ambient humidity of the air conditioner, including: determining whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold; if it is determined that the outdoor ambient temperature of the air conditioner is not less than or equal to the preset outdoor temperature threshold and the outdoor ambient humidity is not greater than or equal to the preset outdoor humidity threshold, then the control condition for determining whether the air conditioner needs to enter defrost mode is the first condition; if it is determined that the outdoor ambient temperature of the air conditioner is less than or equal to the preset outdoor temperature threshold and the outdoor ambient humidity is greater than or equal to the preset outdoor humidity threshold, then the control condition for determining whether the air conditioner needs to enter defrost mode is the second condition.

[0007] In some implementations, determining whether the air conditioner needs to enter defrost mode is based on control conditions for whether the air conditioner needs to enter defrost mode, combined with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor. This includes: if the control condition for determining whether the air conditioner needs to enter defrost mode is a first condition, then determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger; if the control condition for determining whether the air conditioner needs to enter defrost mode is a second condition, then determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and combined with the pipe temperature of the outdoor unit heat exchanger.

[0008] In some implementations, determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the discharge temperature of the compressor, and in conjunction with the pipe temperature of the outdoor unit heat exchanger includes: recording the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a first set time as the first pipe temperature of the indoor unit heat exchanger; recording the discharge temperature of the compressor obtained after the air conditioner has been running for a first set time as the first discharge temperature of the compressor; recording the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a second set time as the second pipe temperature of the indoor unit heat exchanger; recording the discharge temperature of the compressor obtained after the air conditioner has been running for a second set time as the second discharge temperature of the compressor; the second set time is longer than the first set time; determining the difference between the first pipe temperature and the second pipe temperature of the indoor unit heat exchanger, and recording it as the first pipe temperature difference of the indoor unit heat exchanger. The system determines the value; and determines the difference between the first discharge temperature and the second discharge temperature of the compressor, denoted as the first discharge temperature difference of the compressor; it determines whether the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold and the first discharge temperature difference of the compressor is less than the first preset discharge temperature threshold; if it is determined that the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold and the first discharge temperature difference of the compressor is less than the first preset discharge temperature threshold, then the air conditioner is controlled to continue operating in heating mode, and the system continues to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the discharge temperature of the compressor; if it is determined that the first pipe temperature difference of the indoor heat exchanger is not less than the first preset indoor unit pipe temperature threshold and the first discharge temperature difference of the compressor is less than the first preset discharge temperature threshold, then the system determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger.

[0009] In some implementations, the determination of whether the air conditioner needs to enter defrost mode is further based on the pipe temperature of the indoor unit heat exchanger and the discharge temperature of the compressor. This includes: recording the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a third set time as the third pipe temperature of the indoor unit heat exchanger; recording the discharge temperature of the compressor obtained after the air conditioner has been running for a third set time as the third discharge temperature of the compressor; the third set time is greater than the second set time; determining the difference between the second pipe temperature and the third pipe temperature of the indoor unit heat exchanger and recording it as the second pipe temperature difference of the indoor unit heat exchanger; and determining the difference between the second discharge temperature and the third discharge temperature of the compressor and recording it as the second discharge temperature difference of the compressor; and determining whether the conditions are met. The second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold, and the second exhaust temperature difference of the compressor is greater than the second preset exhaust temperature threshold; the second preset indoor unit pipe temperature threshold is greater than the first preset indoor unit pipe temperature threshold, and the second preset exhaust temperature threshold is greater than the first preset exhaust temperature threshold; if it is determined that the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold, and the second exhaust temperature difference of the compressor is greater than the first preset exhaust temperature threshold, then it is determined that the air conditioner needs to enter the defrost mode; if it is determined that the second pipe temperature difference of the indoor heat exchanger is not greater than the second preset indoor unit pipe temperature threshold, and the second exhaust temperature difference of the compressor is greater than the first preset exhaust temperature threshold, then it is determined whether the air conditioner needs to enter the defrost mode based on the pipe temperature of the outdoor unit heat exchanger.

[0010] In some implementations, determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger includes: determining whether the pipe temperature of the outdoor unit heat exchanger is lower than a preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner belongs; if it is determined that the pipe temperature of the outdoor unit heat exchanger is lower than the preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner belongs, then it is determined that the air conditioner needs to enter defrost mode.

[0011] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioner, the air conditioner having a compressor, an outdoor unit heat exchanger, and an indoor unit heat exchanger; the control device for the air conditioner includes: an acquisition unit configured to acquire the outdoor ambient temperature, the outdoor ambient humidity, the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor when the air conditioner is turned on and operating in heating mode; a control unit configured to determine, based on the outdoor ambient temperature and the outdoor ambient humidity, whether the air conditioner needs to enter defrost mode as a first condition or a second condition; the control unit is further configured to determine whether the air conditioner needs to enter defrost mode based on the control condition whether the air conditioner needs to enter defrost mode, combined with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor; the control unit is further configured to control the air conditioner to enter defrost mode if it is determined that the air conditioner needs to enter defrost mode.

[0012] In some implementations, the first condition is determined based on the pipe temperature of the outdoor unit heat exchanger to determine whether the air conditioner needs to enter defrost mode; the second condition is determined based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and the pipe temperature of the outdoor unit heat exchanger; the control unit determines whether the control condition for the air conditioner to enter defrost mode is the first condition or the second condition based on the outdoor ambient temperature and the outdoor ambient humidity of the air conditioner, including: determining whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity is greater than or equal to a preset outdoor humidity threshold; if it is determined that the outdoor ambient temperature of the air conditioner is not less than or equal to the preset outdoor temperature threshold and the outdoor ambient humidity is not greater than or equal to the preset outdoor humidity threshold, then the control condition for the air conditioner to enter defrost mode is determined as the first condition; if it is determined that the outdoor ambient temperature of the air conditioner is less than or equal to the preset outdoor temperature threshold and the outdoor ambient humidity is greater than or equal to the preset outdoor humidity threshold, then the control condition for the air conditioner to enter defrost mode is determined as the second condition.

[0013] In some implementations, the control unit determines whether the air conditioner needs to enter defrost mode based on control conditions for whether the air conditioner needs to enter defrost mode, combined with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor. This includes: if the control condition for determining whether the air conditioner needs to enter defrost mode is a first condition, then determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger; if the control condition for determining whether the air conditioner needs to enter defrost mode is a second condition, then determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and combined with the pipe temperature of the outdoor unit heat exchanger.

[0014] In some embodiments, the control unit determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the discharge temperature of the compressor, and in conjunction with the pipe temperature of the outdoor unit heat exchanger. This includes: recording the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a first set time as the first pipe temperature of the indoor unit heat exchanger; recording the discharge temperature of the compressor obtained after the air conditioner has been running for a first set time as the first discharge temperature of the compressor; recording the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a second set time as the second pipe temperature of the indoor unit heat exchanger; recording the discharge temperature of the compressor obtained after the air conditioner has been running for a second set time as the second discharge temperature of the compressor; the second set time is greater than the first set time; determining the difference between the first pipe temperature and the second pipe temperature of the indoor unit heat exchanger, and recording it as the first discharge temperature of the indoor unit heat exchanger. The system measures the pipe temperature difference; and determines the difference between the first discharge temperature and the second discharge temperature of the compressor, denoted as the first discharge temperature difference of the compressor; it determines whether the first pipe temperature difference of the indoor heat exchanger is less than a first preset indoor unit pipe temperature threshold and the first discharge temperature difference of the compressor is less than a first preset discharge temperature threshold; if it is determined that the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold and the first discharge temperature difference of the compressor is less than the first preset discharge temperature threshold, then the air conditioner is controlled to continue operating in heating mode, and the system continues to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the discharge temperature of the compressor; if it is determined that the first pipe temperature difference of the indoor heat exchanger is not less than the first preset indoor unit pipe temperature threshold and the first discharge temperature difference of the compressor is less than the first preset discharge temperature threshold, then the system determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger.

[0015] In some embodiments, the control unit continues to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the discharge temperature of the compressor, including: recording the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a third set time as the third pipe temperature of the indoor unit heat exchanger; recording the discharge temperature of the compressor obtained after the air conditioner has been running for a third set time as the third discharge temperature of the compressor; the third set time is greater than the second set time; determining the difference between the second pipe temperature and the third pipe temperature of the indoor unit heat exchanger and recording it as the second pipe temperature difference of the indoor unit heat exchanger; and determining the difference between the second discharge temperature and the third discharge temperature of the compressor and recording it as the second discharge temperature difference of the compressor; determining whether... If the conditions are not met (the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold, and the second exhaust temperature difference of the compressor is greater than the second preset exhaust temperature threshold; the second preset indoor unit pipe temperature threshold is greater than the first preset indoor unit pipe temperature threshold, and the second preset exhaust temperature threshold is greater than the first preset exhaust temperature threshold), then the air conditioner needs to enter defrost mode. If the conditions are not met (the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold, and the second exhaust temperature difference of the compressor is greater than the first preset exhaust temperature threshold), then the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger.

[0016] In some implementations, the control unit determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger, including: determining whether the pipe temperature of the outdoor unit heat exchanger is lower than a preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner's outdoor ambient temperature belongs; if it is determined that the pipe temperature of the outdoor unit heat exchanger is lower than the preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner's outdoor ambient temperature belongs, then it is determined that the air conditioner needs to enter defrost mode.

[0017] In conjunction with the above-described device, the present invention further provides an air conditioner, comprising: the control device for the air conditioner described above.

[0018] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device containing the storage medium is controlled to perform the steps of the air conditioner control method described above.

[0019] In conjunction with the above method, the present invention further provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the air conditioner control method described above.

[0020] Therefore, the solution of this invention, regarding the control of defrosting in air conditioning heating, determines whether the outdoor environment is in a low-temperature and high-humidity condition after the air conditioner is turned on and in heating operation: if the outdoor environment is in a low-temperature and high-humidity condition, the air conditioner needs to defrost based on the outdoor unit heat exchanger coil temperature, the indoor unit heat exchanger coil temperature, and the compressor exhaust temperature; if the outdoor environment is not in a low-temperature and high-humidity condition, the air conditioner needs to defrost based on the outdoor unit heat exchanger coil temperature; thus, by combining the outdoor ambient temperature and humidity, the outdoor unit heat exchanger coil temperature, the indoor unit heat exchanger coil temperature, and the compressor exhaust temperature to determine whether the air conditioner needs to defrost, the air conditioner defrosts cleanly, improving the defrosting effect of the outdoor unit heat exchanger and improving the heating effect of the air conditioner.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0022] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating an embodiment of the air conditioner control method of the present invention; Figure 2 This is a flowchart illustrating an embodiment of the method of the present invention, in which the control condition for determining whether the air conditioner needs to enter defrost mode is a first condition or a second condition. Figure 3 This is a schematic flowchart of an embodiment of the method of the present invention, which determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and the pipe temperature of the outdoor unit heat exchanger. Figure 4 This is a schematic flowchart of an embodiment of the method of the present invention, which determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor. Figure 5 This is a flowchart illustrating an embodiment of the method of the present invention for determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger; Figure 6 This is a schematic diagram of the structure of an embodiment of the air conditioner control device of the present invention; Figure 7This is a schematic diagram of the control logic for a defrosting control method of an air conditioner under low temperature and high humidity conditions in an outdoor environment.

[0024] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows: 102 - Acquisition unit; 104 - Control unit. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0026] Considering that the defrosting control method in the relevant solutions may result in incomplete defrosting, which would severely affect the defrosting effect of the outdoor unit's heat exchanger and thus significantly impact the air conditioner's heating performance. Specifically, in the relevant solutions, air conditioners typically determine whether defrosting is needed by combining the outdoor ambient temperature and the outdoor unit's heat exchanger coil temperature. However, when the outdoor environment is characterized by low temperature and high humidity, the outdoor unit's heat exchanger is more prone to frost buildup, and the frost layer on the outdoor unit's heat exchanger is relatively thick. This may lead to incomplete defrosting, resulting in accumulated frost that further increases the thermal resistance of the outdoor unit's heat exchanger, thereby severely affecting its heat exchange efficiency and ultimately reducing the air conditioner's heating performance.

[0027] Therefore, the present invention proposes an air conditioner control method, specifically an air conditioner defrosting control method. This method combines outdoor ambient temperature, outdoor unit heat exchanger coil temperature, indoor unit heat exchanger coil temperature, and compressor discharge temperature to determine whether defrosting is needed. This improves the accuracy of the judgment and control regarding whether the outdoor unit heat exchanger needs defrosting, thereby ensuring that the frost layer on the outdoor unit heat exchanger can be completely melted under low-temperature and high-humidity outdoor ambient conditions. It also ensures the heating effect of the air conditioner and improves the user's heating comfort. The indoor unit heat exchanger coil temperature and compressor discharge temperature are used as the criteria for initiating defrosting because: when the amount of frost on the outdoor unit heat exchanger increases, the heat exchange effect of the outdoor unit heat exchanger deteriorates. At this time, the heat absorbed by the outdoor unit heat exchanger decreases, and the corresponding compressor discharge temperature and indoor unit heat exchanger coil temperature also decrease more rapidly. Therefore, when the compressor discharge temperature and indoor unit heat exchanger coil temperature decrease more rapidly, it indicates that the amount of frost on the outdoor unit heat exchanger is increasing.

[0028] The solution of this invention adds the determination of indoor unit heat exchanger coil temperature and compressor exhaust temperature to the criteria for determining whether defrosting is needed, in addition to the outdoor ambient temperature and outdoor unit heat exchanger coil temperature. This is because outdoor unit heat exchangers are more prone to frost formation in low-temperature and high-humidity outdoor environments. If only the outdoor unit heat exchanger coil temperature is used to determine whether defrosting is needed, defrosting may only begin when there is a large amount of frost on the outdoor unit heat exchanger, resulting in incomplete defrosting. At the same time, if there is a lot of frost on the outdoor unit heat exchanger, the heat exchange efficiency of the outdoor unit heat exchanger will deteriorate, and the heating capacity of the air conditioner will also decrease rapidly. However, by adding the determination of indoor unit heat exchanger coil temperature and compressor exhaust temperature, defrosting is initiated when the frost on the outdoor unit heat exchanger intensifies. This ensures thorough defrosting and allows defrosting of the outdoor unit heat exchanger when the air conditioner's heating capacity is rapidly decreasing, melting the frost layer and thus improving the heat exchange efficiency of the outdoor unit heat exchanger.

[0029] According to embodiments of the present invention, an air conditioning control method is provided, such as... Figure 1 The diagram shows a flow chart of an embodiment of the method of the present invention. The air conditioner includes a compressor, an outdoor unit heat exchanger, and an indoor unit heat exchanger; in the solution of the present invention, as... Figure 1 As shown, the air conditioner control method includes steps S110 to S140.

[0030] In step S110, when the air conditioner is turned on and running in heating mode, the outdoor ambient temperature of the air conditioner, the outdoor ambient humidity of the air conditioner, the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor are obtained.

[0031] In step S120, the control condition for whether the air conditioner needs to enter the defrost mode is determined as either the first condition or the second condition, based on the outdoor ambient temperature and the outdoor ambient humidity of the air conditioner.

[0032] In step S130, based on the control conditions for whether the air conditioner needs to enter the defrost mode, and in combination with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor, it is determined whether the air conditioner needs to enter the defrost mode.

[0033] In step S140, if it is determined that the air conditioner needs to enter the defrost mode, the air conditioner is controlled to enter the defrost mode. After the air conditioner exits the defrost mode, the process returns to determine whether the control condition for the air conditioner to enter the defrost mode is the first condition or the second condition, based on the outdoor ambient temperature and humidity of the air conditioner.

[0034] The present invention proposes a control method for air conditioners to enter defrost mode under low temperature and high humidity outdoor conditions: after the air conditioner is turned on, the outdoor unit sensor obtains the outdoor ambient temperature and humidity, and selects the defrost entry conditions based on the outdoor ambient temperature; by detecting and comparing the indoor unit heat exchanger coil temperature, compressor exhaust temperature, and outdoor unit heat exchanger coil temperature, it is determined whether the air conditioner needs to defrost, thereby improving the accuracy of the judgment and control of whether the outdoor unit heat exchanger needs to defrost, thus ensuring that the frost layer on the outdoor unit heat exchanger can be completely melted under low temperature and high humidity outdoor conditions, while also ensuring the heating effect of the air conditioner and improving the user's heating comfort.

[0035] In some implementations, the first condition is to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger; the second condition is to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor, combined with the pipe temperature of the outdoor unit heat exchanger.

[0036] The specific process of determining whether the control condition for the air conditioner to enter defrost mode, based on the outdoor ambient temperature and humidity of the air conditioner, is the first condition or the second condition in step S120, is illustrated in the following exemplary description. The following is a combination of... Figure 2 The flowchart shown is a schematic diagram of an embodiment of the method of the present invention, in which the control condition for determining whether the air conditioner needs to enter the defrost mode is the first condition or the second condition. The specific process of determining whether the control condition for determining whether the air conditioner needs to enter the defrost mode is the first condition or the second condition in step S120 is further explained, including steps S210 to S230.

[0037] Step S210: Determine whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold.

[0038] Step S220: If it is determined that the outdoor ambient temperature of the air conditioner is less than or equal to the preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to the preset outdoor humidity threshold, then the control condition for determining whether the air conditioner needs to enter the defrost mode is the first condition, that is, the air conditioner needs to enter the defrost mode based on the pipe temperature of the outdoor unit heat exchanger.

[0039] Step S230: If it is determined that the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold, then the control condition for determining whether the air conditioner needs to enter the defrost mode is the second condition, that is, based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor, and in combination with the pipe temperature of the outdoor unit heat exchanger, it is determined whether the air conditioner needs to enter the defrost mode.

[0040] Figure 7 This is a schematic diagram of the control logic for an air conditioner defrosting method under low temperature and high humidity outdoor conditions. Figure 7 As shown, a defrosting control method for air conditioners under low temperature and high humidity conditions in an outdoor environment includes: Step S01: The user turns on the air conditioner and receives a signal to start the heating mode. Then, step S02 is executed.

[0041] Step S02: Detect the outdoor ambient temperature and outdoor ambient humidity, and then proceed to step S03.

[0042] Step S03: The air conditioner selects the defrosting control conditions based on the detected outdoor ambient temperature and humidity. If the outdoor ambient temperature is low and the outdoor ambient humidity is high, then step S04 is executed. For example, the outdoor ambient temperature is between -5℃ and 5℃, and the outdoor ambient humidity is greater than 80%.

[0043] The present invention adds the determination of indoor unit heat exchanger coil temperature and compressor exhaust temperature to the condition of determining whether defrosting is required by combining outdoor ambient temperature and outdoor unit heat exchanger coil temperature. This improves the accuracy of the determination and control of whether the outdoor unit heat exchanger needs defrosting, thereby ensuring that the frost layer on the outdoor unit heat exchanger can be completely melted under low temperature and high humidity outdoor environment conditions. At the same time, it also ensures the heating effect of the air conditioner and improves the user's heating comfort.

[0044] In some implementations, in step S130, based on the control conditions for whether the air conditioner needs to enter defrost mode, and in conjunction with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor, it is determined whether the air conditioner needs to enter defrost mode, including any of the following determination scenarios: The first determined scenario: If the control condition for determining whether the air conditioner needs to enter defrost mode is the first condition, then the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger.

[0045] The second determined scenario: If the control condition for determining whether the air conditioner needs to enter the defrost mode is the second condition, then the air conditioner needs to enter the defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and the pipe temperature of the outdoor unit heat exchanger.

[0046] like Figure 7 As shown, a defrosting control method for an air conditioner under low temperature and high humidity conditions in an outdoor environment further includes: in step S03, the control conditions for entering defrosting include: defrosting condition 1 and defrosting condition 2.

[0047] One of the defrosting conditions is to determine whether the air conditioner needs to defrost based on the outdoor ambient temperature and the outdoor unit's heat exchanger coil temperature. For example, defrosting condition 1 means that different outdoor ambient temperature ranges are given different outdoor unit heat exchanger coil temperatures. When the outdoor unit heat exchanger coil temperature reaches the preset temperature value under a certain outdoor ambient temperature, defrosting will begin.

[0048] Defrosting condition 2: Determine whether the air conditioner needs defrosting based on the outdoor ambient temperature, the outdoor unit's heat exchanger coil temperature, the indoor unit's heat exchanger coil temperature, and the compressor's exhaust temperature. For example, the outdoor ambient temperature is the initial judgment condition. That is, when the outdoor ambient temperature is within the range of low temperature and high humidity conditions, defrosting condition 2 is used to determine defrosting. Subsequent specific defrosting judgment conditions do not require the outdoor ambient temperature.

[0049] In step S03, if the outdoor environment is characterized by low temperature and high humidity, then condition 2 for entering defrost is selected to determine whether defrosting is necessary, i.e., step S04 is executed; for other outdoor ambient temperatures, condition 1 for entering defrost is used to determine whether defrosting is necessary. For example, determining defrosting based on condition 1 for other outdoor ambient temperatures means judging defrosting based on both the outdoor ambient temperature and the outdoor unit's heat exchanger coil temperature.

[0050] Because outdoor unit heat exchangers are more prone to frost buildup in low-temperature, high-humidity environments, relying solely on the outdoor unit heat exchanger coil temperature to determine defrosting needs may result in incomplete defrosting due to excessive frost buildup. Furthermore, excessive frost on the outdoor unit heat exchanger reduces its heat exchange efficiency, leading to a rapid decrease in the unit's heating capacity. However, by combining indoor unit heat exchanger coil and compressor exhaust temperatures, defrosting can be initiated when frost buildup on the outdoor unit intensifies. This ensures thorough defrosting and allows for defrosting when the temperature readings rapidly decline, melting the frost and improving the outdoor unit's heat exchange efficiency.

[0051] In some embodiments, the specific process of determining whether the air conditioner needs to enter defrost mode in step S130, based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and in conjunction with the pipe temperature of the outdoor unit heat exchanger, is described in the following exemplary description. The following is a description in conjunction with... Figure 3 The illustrated flowchart of an embodiment of the method of the present invention, which determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and the pipe temperature of the outdoor unit heat exchanger, further illustrates the specific process of determining whether the air conditioner needs to enter defrost mode in step S130, which includes steps S310 to S360.

[0052] Step S310: The pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a first set time after being turned on is recorded as the first pipe temperature of the indoor unit heat exchanger; the discharge temperature of the compressor obtained after the air conditioner has been running for a first set time after being turned on is recorded as the first discharge temperature of the compressor; wherein, the first set time is such as time t1min, and the first pipe temperature of the indoor unit heat exchanger is such as the coil temperature T of the indoor unit heat exchanger. 内管1 The first discharge temperature of the compressor is such as the compressor discharge temperature T. 排气1 .

[0053] Step S320: The pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a second set time after being turned on is recorded as the second pipe temperature of the indoor unit heat exchanger; the discharge temperature of the compressor obtained after the air conditioner has been running for a second set time after being turned on is recorded as the second discharge temperature of the compressor; the second set time is greater than the first set time; wherein, the second set time is such as time t2min, and the second pipe temperature of the indoor unit heat exchanger is such as the coil temperature T of the indoor unit heat exchanger. 内管2 The second discharge temperature of the compressor is such as the compressor discharge temperature T. 排气2 .

[0054] Step S330: Determine the difference between the first pipe temperature and the second pipe temperature of the indoor unit heat exchanger, and record it as the first pipe temperature difference value of the indoor unit heat exchanger; and determine the difference between the first discharge temperature and the second discharge temperature of the compressor, and record it as the first discharge temperature difference value of the compressor; wherein, the first pipe temperature difference value of the indoor unit heat exchanger is as the indoor unit heat exchanger coil temperature T. 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 The first discharge temperature difference of the compressor is such as the compressor discharge temperature T. 排气1 With compressor discharge temperature T排气2 The difference ΔT 排气1 .

[0055] Step S340: Determine whether the following conditions are met: the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold, and the first exhaust temperature difference of the compressor is less than the first preset exhaust temperature threshold; wherein, the first preset indoor unit pipe temperature threshold is as follows: T 内管温差1 The first preset exhaust temperature threshold is T. 排气温差1 .

[0056] Step S350: If it is determined that the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold and the first exhaust temperature difference of the compressor is less than the first preset exhaust temperature threshold, then the air conditioner is controlled to continue running in heating mode, and the air conditioner is further determined to enter defrosting mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor. Step S360: If it is determined that the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold and the first exhaust temperature difference of the compressor is less than the first preset exhaust temperature threshold, then it is determined whether the air conditioner needs to enter the defrosting mode based on the pipe temperature of the outdoor unit heat exchanger.

[0057] like Figure 7 As shown, a defrosting control method for air conditioners under low temperature and high humidity outdoor conditions also includes: Step S04: When the air conditioner has been running for t1 minutes, measure the temperature T of the indoor unit's heat exchanger coil. 内管1 Compressor discharge temperature T 排气1 Then proceed to step S05. t1min, such as 10min~20min.

[0058] Step S05: When the air conditioner has been running for t2 minutes, measure the temperature T of the indoor unit's heat exchanger coil. 内管2 Compressor discharge temperature T 排气2 Then proceed to step S06. t2min, such as 30min~40min.

[0059] Step S06: Calculate the indoor unit heat exchanger coil temperature T 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 Compressor discharge temperature T 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 Then proceed to step S07.

[0060] Step S07: Determine whether the indoor unit heat exchanger coil temperature T is met. 内管1With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 <T 内管温差1 (e.g., 5℃), and the compressor discharge temperature T 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 <T 排气温差1 (e.g., 5℃), and execute the corresponding control based on the judgment result.

[0061] In step S07, if the indoor unit heat exchanger coil temperature T is satisfied... 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 <T 内管温差1 And the compressor discharge temperature T 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 <T 排气温差1 Then proceed to step S08.

[0062] In step S07, if the indoor unit heat exchanger coil temperature T is not met... 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 <T 内管温差1 And the compressor discharge temperature T 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 <T 排气温差1 Then, the outdoor unit heat exchanger coil temperature T is detected. 外管 If the outdoor unit heat exchanger coil temperature T 外管 The unit enters defrosting mode once the defrosting temperature is reached. The indoor unit heat exchanger coil temperature and compressor discharge temperature are used as criteria for entering defrosting because when the amount of frost on the outdoor unit heat exchanger increases, its heat exchange efficiency deteriorates. This reduces the amount of heat absorbed by the outdoor unit, leading to a significant decrease in the compressor discharge temperature and the indoor unit heat exchanger coil temperature. Therefore, a significant decrease in these temperatures indicates that the amount of frost on the outdoor unit heat exchanger is increasing, triggering defrosting. This timely defrosting process effectively removes frost from the outdoor unit heat exchanger, preventing incomplete defrosting due to excessive frost buildup. Furthermore, defrosting improves the heat exchanger's efficiency, ensuring optimal heating performance.

[0063] It should be noted that if the outdoor unit heat exchanger has a large amount of frost, meaning the frost is thick, it will increase the thermal resistance of the outdoor unit heat exchanger, reducing the amount of heat it can absorb. This reduced heat absorption will cause changes in the indoor unit heat exchanger coil temperature and the compressor discharge temperature. When the air conditioner is in heating mode, the outdoor unit heat exchanger absorbs heat. When the amount of heat absorbed decreases, the indoor unit heat exchanger coil temperature and the compressor discharge temperature will decrease. If both decrease significantly, it indicates a substantial reduction in the amount of heat absorbed by the outdoor unit heat exchanger, resulting in poor heat exchange efficiency and a large amount of frost buildup. Therefore, by comparing the changes in the indoor unit heat exchanger coil temperature and the compressor discharge temperature at different times, the frost situation of the outdoor unit heat exchanger can be determined. If the changes in the indoor unit heat exchanger coil temperature and the compressor discharge temperature are significant, it indicates that the amount of frost on the outdoor unit heat exchanger is increasing, requiring defrosting to melt the frost and improve the air conditioner's heating efficiency. However, when the change in both is less than the preset difference, it is necessary to consider the outdoor unit's heat exchanger coil temperature to determine whether defrosting is required. For example, in step S07, when the change in the inner pipe temperature and exhaust temperature (e.g., ΔT) is less than the preset difference, it is necessary to consider the outdoor unit's heat exchanger coil temperature to determine whether defrosting is required. 内管1 and ΔT 排气1 After 1 hour, defrost condition 1 is used to determine defrost status.

[0064] In some implementations, step S350 continues the process of determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor. See the following exemplary description. The following is in conjunction with... Figure 4 The schematic diagram of an embodiment of the method of the present invention shows that, based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor, it is determined whether the air conditioner needs to enter the defrost mode. The specific process of determining whether the air conditioner needs to enter the defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor in step S350 is further explained, including steps S410 to S450.

[0065] Step S410: The pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been running for a third set time after being turned on is recorded as the third pipe temperature of the indoor unit heat exchanger; the discharge temperature of the compressor obtained after the air conditioner has been running for a third set time after being turned on is recorded as the third discharge temperature of the compressor; the third set time is greater than the second set time; wherein, the third set time is such as time t3min, and the third pipe temperature of the indoor unit heat exchanger is such as the coil temperature T of the indoor unit heat exchanger. 内管3 The third discharge temperature of the compressor is such as the compressor discharge temperature T. 排气3 .

[0066] Step S420: Determine the difference between the second pipe temperature and the third pipe temperature of the indoor unit heat exchanger, and record it as the second pipe temperature difference value of the indoor unit heat exchanger; and determine the difference between the second discharge temperature and the third discharge temperature of the compressor, and record it as the second discharge temperature difference value of the compressor; wherein, the second pipe temperature difference value of the indoor unit heat exchanger is equal to the indoor unit heat exchanger coil temperature T. 内管2 With indoor unit heat exchanger coil temperature T 内管3 The difference ΔT 内管2 The second exhaust temperature difference of the compressor is such as the compressor exhaust temperature T. 排气2 With compressor discharge temperature T 排气1 The difference ΔT 排气2 .

[0067] Step S430: Determine whether the following conditions are met: the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold, and the second exhaust temperature difference of the compressor is greater than the second preset exhaust temperature threshold; the second preset indoor unit pipe temperature threshold is greater than the first preset indoor unit pipe temperature threshold, and the second preset exhaust temperature threshold is greater than the first preset exhaust temperature threshold; wherein, the second preset indoor unit pipe temperature threshold is as shown in T. 内管温差2 The second preset exhaust temperature threshold is as follows: T 排气温差2 .

[0068] Step S440: If it is determined that the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold and the second exhaust temperature difference of the compressor is greater than the first preset exhaust temperature threshold, then it is determined that the air conditioner needs to enter the defrosting mode.

[0069] Step S450: If it is determined that the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold and the second exhaust temperature difference of the compressor is greater than the first preset exhaust temperature threshold, then it is determined whether the air conditioner needs to enter the defrosting mode based on the pipe temperature of the outdoor unit heat exchanger.

[0070] like Figure 7 As shown, a defrosting control method for air conditioners under low temperature and high humidity outdoor conditions also includes: Step S08: When the air conditioner has been running for t3 minutes, detect the indoor unit heat exchanger coil temperature T. 内管3 and compressor exhaust temperature T 排气3 Calculate the indoor unit heat exchanger coil temperature T 内管2 With indoor unit heat exchanger coil temperature T 内管3 The difference ΔT 内管2 Compressor discharge temperature T 排气2 With compressor discharge temperature T 排气1 The difference ΔT 排气2Then proceed to step S09. t3min, such as 40min~50min.

[0071] Step S09, if the indoor unit heat exchanger coil temperature T 内管2 With indoor unit heat exchanger coil temperature T 内管3 The difference ΔT 内管2 >T 内管温差2 (e.g., 7℃), and the compressor discharge temperature T 排气2 With compressor discharge temperature T 排气1 The difference ΔT 排气2 >T 排气温差2 If the temperature reaches 7℃, then defrosting begins; otherwise, check the outdoor unit's heat exchanger coil temperature T. 外管 If the outdoor unit heat exchanger coil temperature T 外管 Once the defrosting temperature is reached, defrosting begins, i.e., step S10 is executed.

[0072] It should be noted that if the outdoor environment is under low temperature and high humidity conditions, and the indoor unit's heat exchanger coil temperature and compressor discharge temperature decrease significantly, it indicates that the outdoor unit's heat exchanger has accumulated a lot of frost, which has affected the indoor unit's heating performance. In this case, defrosting is necessary to melt the frost layer on the outdoor unit's heat exchanger. Simultaneously, when it is determined that the amount of frost on the outdoor unit's heat exchanger is increasing, defrosting should begin to melt all the frost, preventing accumulated frost from affecting subsequent heating performance. Also, T 内管温差2 >T 内管温差1 T 排气温差2 >T 排气温差1 .

[0073] In the present invention, the determination of whether defrosting is required is supplemented by the detection and judgment of the indoor unit heat exchanger coil temperature and the compressor exhaust temperature. By detecting the indoor unit heat exchanger coil temperature, the compressor exhaust temperature and the outdoor unit heat exchanger coil temperature, the air conditioner is determined to determine whether defrosting is required, thereby improving the accuracy of the determination and control of whether defrosting is required. This ensures that the frost layer on the outdoor unit heat exchanger can be completely melted under the low temperature and high humidity outdoor environment, while also ensuring the heating effect of the air conditioner and improving the user's heating comfort.

[0074] In some implementations, the specific process of determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger in step S130 is described in the following exemplary description. The following is in conjunction with... Figure 5 The flowchart shown is a schematic diagram of an embodiment of the method of the present invention, which determines whether the air conditioner needs to enter the defrost mode based on the pipe temperature of the outdoor unit heat exchanger. The specific process of determining whether the air conditioner needs to enter the defrost mode based on the pipe temperature of the outdoor unit heat exchanger in step S130 is further explained, including steps S510 to S520.

[0075] Step S510: Determine whether the pipe temperature of the outdoor unit heat exchanger is lower than the preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner belongs.

[0076] Step S520: If it is determined that the pipe temperature of the outdoor unit heat exchanger is less than the preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner belongs, then it is determined that the air conditioner needs to enter the defrosting mode.

[0077] like Figure 7 As shown, a defrosting control method for an air conditioner under low temperature and high humidity outdoor conditions further includes: step S10, detecting the outdoor unit heat exchanger coil temperature T. 外管 If the outdoor unit heat exchanger coil temperature T 外管 Once the defrosting temperature is reached, defrosting begins. If, by detecting and comparing the compressor discharge temperature and the indoor unit heat exchanger coil temperature at different times, it is found that the compressor discharge temperature and the indoor unit heat exchanger coil temperature have not decreased significantly, it indicates that the amount of frost on the outdoor unit heat exchanger has not increased. By detecting the outdoor unit heat exchanger coil temperature, it can be determined whether defrosting is necessary, thus achieving a thorough defrosting effect.

[0078] Preferably, the method for determining defrosting condition 1 is as follows: for different outdoor ambient temperature ranges, different outdoor unit heat exchanger coil temperatures are given. When the outdoor unit heat exchanger coil temperature reaches the preset temperature value under a certain outdoor ambient temperature, defrosting is performed.

[0079] The technical solution of this embodiment controls the defrosting process of the air conditioner during heating operation. When the air conditioner is turned on and running in heating mode, it determines whether the outdoor environment is in a low-temperature, high-humidity condition. If the outdoor environment is in a low-temperature, high-humidity condition, it determines whether the air conditioner needs to defrost based on the outdoor unit heat exchanger coil temperature, the indoor unit heat exchanger coil temperature, and the compressor exhaust temperature. If the outdoor environment is not in a low-temperature, high-humidity condition, it determines whether the air conditioner needs to defrost based on the outdoor unit heat exchanger coil temperature. Therefore, by combining the outdoor ambient temperature and humidity, the outdoor unit heat exchanger coil temperature, the indoor unit heat exchanger coil temperature, and the compressor exhaust temperature to determine whether the air conditioner needs to defrost, the defrosting process is clean, improving the defrosting effect of the outdoor unit heat exchanger and thus enhancing the air conditioner's heating performance.

[0080] According to an embodiment of the present invention, an air conditioner control device corresponding to the air conditioner control method is also provided. See also Figure 6 The diagram shows a structural schematic of an embodiment of the device of the present invention. The air conditioner includes a compressor, an outdoor unit heat exchanger, and an indoor unit heat exchanger; in the embodiment of the present invention, as... Figure 6As shown, the control device of the air conditioner includes: an acquisition unit 102 and a control unit 104.

[0081] The acquisition unit 102 is configured to acquire the outdoor ambient temperature, the outdoor ambient humidity, the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor when the air conditioner is turned on and operating in heating mode. The specific functions and processing of this acquisition unit 102 are described in step S110.

[0082] The control unit 104 is configured to determine, based on the outdoor ambient temperature and humidity of the air conditioner, whether the control condition for the air conditioner to enter defrost mode is a first condition or a second condition. The specific functions and processing of this control unit 104 are described in step S120.

[0083] The control unit 104 is further configured to determine whether the air conditioner needs to enter defrost mode based on control conditions regarding whether the air conditioner needs to enter defrost mode, combined with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor. The specific functions and processing of this control unit 104 are further described in step S130.

[0084] The control unit 104 is further configured to, if it is determined that the air conditioner needs to enter defrost mode, control the air conditioner to enter defrost mode, and then, after the air conditioner exits defrost mode, return to the previous state to re-determine whether the control condition for the air conditioner to enter defrost mode is the first condition or the second condition based on the outdoor ambient temperature and humidity of the air conditioner. The specific functions and processing of this control unit 104 are further described in step S140.

[0085] The present invention proposes a control method for air conditioners to enter defrost mode under low temperature and high humidity outdoor conditions: after the air conditioner is turned on, the outdoor unit sensor obtains the outdoor ambient temperature and humidity, and selects the defrost entry conditions based on the outdoor ambient temperature; by detecting and comparing the indoor unit heat exchanger coil temperature, compressor exhaust temperature, and outdoor unit heat exchanger coil temperature, it is determined whether the air conditioner needs to defrost, thereby improving the accuracy of the judgment and control of whether the outdoor unit heat exchanger needs to defrost, thus ensuring that the frost layer on the outdoor unit heat exchanger can be completely melted under low temperature and high humidity outdoor conditions, while also ensuring the heating effect of the air conditioner and improving the user's heating comfort.

[0086] In some implementations, the first condition is to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger; the second condition is to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor, combined with the pipe temperature of the outdoor unit heat exchanger.

[0087] The control unit 104 determines, based on the outdoor ambient temperature and humidity of the air conditioner, whether the control condition for the air conditioner to enter defrost mode is a first condition or a second condition, including: The control unit 104 is further configured to determine whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold. The specific functions and processing of the control unit 104 are further described in step S210.

[0088] The control unit 104 is further configured to determine whether the air conditioner needs to enter defrost mode as a first condition if it is determined that the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold. Specifically, it determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit's heat exchanger. The specific functions and processing of this control unit 104 are further described in step S220.

[0089] The control unit 104 is further configured to determine whether the air conditioner needs to enter defrost mode as a second condition if it is determined that the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold. Specifically, it determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and the pipe temperature of the outdoor unit heat exchanger. The specific functions and processing of this control unit 104 are further described in step S230.

[0090] Figure 7 This is a schematic diagram of the control logic for an air conditioner defrosting method under low temperature and high humidity outdoor conditions. Figure 7 As shown, a defrosting control method for air conditioners under low temperature and high humidity conditions in an outdoor environment includes: Step S01: The user turns on the air conditioner and receives a signal to start the heating mode. Then, step S02 is executed.

[0091] Step S02: Detect the outdoor ambient temperature and outdoor ambient humidity, and then proceed to step S03.

[0092] Step S03: The air conditioner selects the defrosting control conditions based on the detected outdoor ambient temperature and outdoor ambient humidity; if the outdoor ambient temperature is low and the outdoor ambient humidity is high at this time, then step S04 is executed.

[0093] The present invention adds the determination of indoor unit heat exchanger coil temperature and compressor exhaust temperature to the condition of determining whether defrosting is required by combining outdoor ambient temperature and outdoor unit heat exchanger coil temperature. This improves the accuracy of the determination and control of whether the outdoor unit heat exchanger needs defrosting, thereby ensuring that the frost layer on the outdoor unit heat exchanger can be completely melted under low temperature and high humidity outdoor environment conditions. At the same time, it also ensures the heating effect of the air conditioner and improves the user's heating comfort.

[0094] In some implementations, the control unit 104 determines whether the air conditioner needs to enter defrost mode based on control conditions regarding whether the air conditioner needs to enter defrost mode, combined with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor. This determination includes any of the following scenarios: The first determined scenario: The control unit 104 is further configured to determine whether the air conditioner needs to enter the defrost mode based on the pipe temperature of the outdoor unit heat exchanger if the control condition for determining whether the air conditioner needs to enter the defrost mode is the first condition.

[0095] The second determined scenario: The control unit 104 is further configured to determine whether the air conditioner needs to enter the defrost mode if the control condition for determining whether the air conditioner needs to enter the defrost mode is the second condition, based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and in combination with the pipe temperature of the outdoor unit heat exchanger.

[0096] like Figure 7 As shown, a defrosting control method for an air conditioner under low temperature and high humidity conditions in an outdoor environment further includes: in step S03, the control conditions for entering defrosting include: defrosting condition 1 and defrosting condition 2.

[0097] Among them, the first condition for entering defrost is to determine whether the air conditioner needs to defrost based on the outdoor ambient temperature and the outdoor unit heat exchanger coil temperature.

[0098] Condition 2 for entering defrost: Determine whether the air conditioner needs to defrost based on the outdoor ambient temperature, the outdoor unit heat exchanger coil temperature, the indoor unit heat exchanger coil temperature, and the compressor exhaust temperature.

[0099] In step S03, if the outdoor environment is characterized by low temperature and high humidity, then condition 2 for entering defrost mode is selected to determine whether defrosting is necessary, i.e., step S04 is executed; otherwise, condition 1 for entering defrost mode is used to determine whether defrosting is necessary. This is because outdoor unit heat exchangers are more prone to frost buildup in low-temperature, high-humidity environments. If only the outdoor unit heat exchanger coil temperature is used to determine whether defrosting is needed, defrosting may only begin when a significant amount of frost has accumulated, resulting in incomplete defrosting. Furthermore, if the outdoor unit heat exchanger has a large amount of frost, its heat exchange efficiency will decrease, and the unit's heating capacity will rapidly decline. However, by combining the indoor unit heat exchanger coil and compressor exhaust temperatures, defrosting is initiated when frost buildup on the outdoor unit heat exchanger intensifies. This ensures thorough defrosting and allows for defrosting when the judgment capability rapidly declines, melting the frost layer and improving the heat exchange efficiency of the outdoor unit heat exchanger.

[0100] In some embodiments, the control unit 104 determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor, combined with the pipe temperature of the outdoor unit heat exchanger, including: The control unit 104 is further configured to record the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been turned on and running for a first set time as the first pipe temperature of the indoor unit heat exchanger; and to record the discharge temperature of the compressor obtained after the air conditioner has been turned on and running for a first set time as the first discharge temperature of the compressor; wherein, the first set time is such as time t1min, and the first pipe temperature of the indoor unit heat exchanger is such as the coil temperature T of the indoor unit heat exchanger. 内管1 The first discharge temperature of the compressor is such as the compressor discharge temperature T. 排气1 For details on the specific functions and processing of the control unit 104, please refer to step S310.

[0101] The control unit 104 is further configured to record the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been turned on and running for a second set time as the second pipe temperature of the indoor unit heat exchanger; and to record the discharge temperature of the compressor obtained after the air conditioner has been turned on and running for a second set time as the second discharge temperature of the compressor; the second set time is longer than the first set time; wherein, the second set time is such as time t2min, and the second pipe temperature of the indoor unit heat exchanger is such as the coil temperature T of the indoor unit heat exchanger. 内管2 The second discharge temperature of the compressor is such as the compressor discharge temperature T. 排气2 For details on the specific functions and processing of the control unit 104, please refer to step S320.

[0102] The control unit 104 is further configured to determine the difference between the first pipe temperature and the second pipe temperature of the indoor unit heat exchanger, denoted as the first pipe temperature difference value of the indoor unit heat exchanger; and to determine the difference between the first discharge temperature and the second discharge temperature of the compressor, denoted as the first discharge temperature difference value of the compressor; wherein, the first pipe temperature difference value of the indoor unit heat exchanger is such that the indoor unit heat exchanger coil temperature T 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 The first discharge temperature difference of the compressor is such as the compressor discharge temperature T. 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 For details on the specific functions and processing of the control unit 104, please refer to step S330.

[0103] The control unit 104 is further configured to determine whether the conditions are met: the first pipe temperature difference of the indoor heat exchanger is less than a first preset indoor unit pipe temperature threshold, and the first exhaust temperature difference of the compressor is less than a first preset exhaust temperature threshold; wherein, the first preset indoor unit pipe temperature threshold is as follows: T 内管温差1 The first preset exhaust temperature threshold is T. 排气温差1 For details on the specific functions and processing of the control unit 104, please refer to step S340.

[0104] The control unit 104 is further configured to, if it is determined that the first pipe temperature difference of the indoor heat exchanger is less than a first preset indoor unit pipe temperature threshold and the first exhaust temperature difference of the compressor is less than a first preset exhaust temperature threshold, then control the air conditioner to continue operating in heating mode, and continue to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor. The specific functions and processing of this control unit 104 are further described in step S350.

[0105] The control unit 104 is further configured to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger if it is determined that the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold and the first exhaust temperature difference of the compressor is less than the first preset exhaust temperature threshold. The specific functions and processing of this control unit 104 are further described in step S360.

[0106] like Figure 7 As shown, a defrosting control method for air conditioners under low temperature and high humidity outdoor conditions also includes: Step S04: When the air conditioner has been running for t1 minutes, measure the temperature T of the indoor unit's heat exchanger coil. 内管1 Compressor discharge temperature T 排气1Then proceed to step S05. t1min, such as 10min~20min.

[0107] Step S05: When the air conditioner has been running for t2 minutes, measure the temperature T of the indoor unit's heat exchanger coil. 内管2 Compressor discharge temperature T 排气2 Then proceed to step S06. t2min, such as 30min~40min.

[0108] Step S06: Calculate the indoor unit heat exchanger coil temperature T 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 Compressor discharge temperature T 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 Then proceed to step S07.

[0109] Step S07: Determine whether the indoor unit heat exchanger coil temperature T is met. 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 <T 内管温差1 And the compressor discharge temperature T 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 <T 排气温差1 Based on the judgment result, the corresponding control is executed.

[0110] In step S07, if the indoor unit heat exchanger coil temperature T is satisfied... 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 <T 内管温差1 And the compressor discharge temperature T 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 <T 排气温差1 Then proceed to step S08.

[0111] In step S07, if the indoor unit heat exchanger coil temperature T is not met... 内管1 With indoor unit heat exchanger coil temperature T 内管2 The difference ΔT 内管1 <T 内管温差1 And the compressor discharge temperature T 排气1 With compressor discharge temperature T 排气2 The difference ΔT 排气1 <T 排气温差1 Then, the outdoor unit heat exchanger coil temperature T is detected. 外管 If the outdoor unit heat exchanger coil temperature T 外管The unit enters defrosting mode once the defrosting temperature is reached. The indoor unit heat exchanger coil temperature and compressor discharge temperature are used as criteria for entering defrosting because when the amount of frost on the outdoor unit heat exchanger increases, its heat exchange efficiency deteriorates. This reduces the amount of heat absorbed by the outdoor unit, leading to a significant decrease in the compressor discharge temperature and the indoor unit heat exchanger coil temperature. Therefore, a significant decrease in these temperatures indicates that the amount of frost on the outdoor unit heat exchanger is increasing, triggering defrosting. This timely defrosting process effectively removes frost from the outdoor unit heat exchanger, preventing incomplete defrosting due to excessive frost buildup. Furthermore, defrosting improves the heat exchanger's efficiency, ensuring optimal heating performance.

[0112] It should be noted that if the outdoor unit heat exchanger has a large amount of frost, meaning the frost is thick, it will increase the thermal resistance of the outdoor unit heat exchanger, reducing the amount of heat it can absorb. This reduced heat absorption will cause changes in the indoor unit heat exchanger coil temperature and the compressor discharge temperature. When the air conditioner is in heating mode, the outdoor unit heat exchanger absorbs heat. When the amount of heat absorbed decreases, the indoor unit heat exchanger coil temperature and the compressor discharge temperature will decrease. If both decrease significantly, it indicates a substantial reduction in the amount of heat absorbed by the outdoor unit heat exchanger, resulting in poor heat exchange efficiency and a large amount of frost buildup. Therefore, by comparing the changes in the indoor unit heat exchanger coil temperature and the compressor discharge temperature at different times, the frost situation of the outdoor unit heat exchanger can be determined. If the changes in the indoor unit heat exchanger coil temperature and the compressor discharge temperature are significant, it indicates that the amount of frost on the outdoor unit heat exchanger is increasing, requiring defrosting to melt the frost and improve the air conditioner's heating efficiency. However, when the difference between the two is less than the preset value, it is necessary to combine the outdoor unit heat exchanger coil temperature to determine whether defrosting is required.

[0113] In some embodiments, the control unit 104 continues to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor, including: The control unit 104 is further configured to record the pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been turned on and running for a third set time as the third pipe temperature of the indoor unit heat exchanger; and to record the discharge temperature of the compressor obtained after the air conditioner has been turned on and running for a third set time as the third discharge temperature of the compressor; the third set time is greater than the second set time; wherein, the third set time is such as time t3min, and the third pipe temperature of the indoor unit heat exchanger is such as the coil temperature T of the indoor unit heat exchanger. 内管3 The third discharge temperature of the compressor is such as the compressor discharge temperature T. 排气3 For details on the specific functions and processing of the control unit 104, please refer to step S410.

[0114] The control unit 104 is further configured to determine the difference between the second pipe temperature and the third pipe temperature of the indoor unit heat exchanger, denoted as the second pipe temperature difference value of the indoor unit heat exchanger; and to determine the difference between the second discharge temperature and the third discharge temperature of the compressor, denoted as the second discharge temperature difference value of the compressor; wherein, the second pipe temperature difference value of the indoor unit heat exchanger is as follows: indoor unit heat exchanger coil temperature T 内管2 With indoor unit heat exchanger coil temperature T 内管3 The difference ΔT 内管2 The second exhaust temperature difference of the compressor is such as the compressor exhaust temperature T. 排气2 With compressor discharge temperature T 排气1 The difference ΔT 排气2 For details on the specific functions and processing of the control unit 104, please refer to step S420.

[0115] The control unit 104 is further configured to determine whether the following conditions are met: the second pipe temperature difference of the indoor heat exchanger is greater than a second preset indoor unit pipe temperature threshold, and the second exhaust temperature difference of the compressor is greater than a second preset exhaust temperature threshold; the second preset indoor unit pipe temperature threshold is greater than a first preset indoor unit pipe temperature threshold, and the second preset exhaust temperature threshold is greater than the first preset exhaust temperature threshold; wherein, the second preset indoor unit pipe temperature threshold is as shown in T. 内管温差2 The second preset exhaust temperature threshold is as follows: T 排气温差2 For details on the specific functions and processing of the control unit 104, please refer to step S430.

[0116] The control unit 104 is further configured to determine that the air conditioner needs to enter defrost mode if it is determined that the second pipe temperature difference of the indoor heat exchanger is greater than a second preset indoor unit pipe temperature threshold and the second exhaust temperature difference of the compressor is greater than a first preset exhaust temperature threshold. The specific functions and processing of this control unit 104 are further described in step S440.

[0117] The control unit 104 is further configured to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger if it is determined that the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold and the second exhaust temperature difference of the compressor is greater than the first preset exhaust temperature threshold. The specific functions and processing of this control unit 104 are further described in step S450.

[0118] like Figure 7 As shown, a defrosting control method for air conditioners under low temperature and high humidity outdoor conditions also includes: Step S08: When the air conditioner has been running for t3 minutes, detect the indoor unit heat exchanger coil temperature T. 内管3 and compressor exhaust temperature T排气3 Calculate the indoor unit heat exchanger coil temperature T 内管2 With indoor unit heat exchanger coil temperature T 内管3 The difference ΔT 内管2 Compressor discharge temperature T 排气2 With compressor discharge temperature T 排气1 The difference ΔT 排气2 Then proceed to step S09. t3min, such as 40min~50min.

[0119] Step S09, if the indoor unit heat exchanger coil temperature T 内管2 With indoor unit heat exchanger coil temperature T 内管3 The difference ΔT 内管2 >T 内管温差2 And the compressor discharge temperature T 排气2 With compressor discharge temperature T 排气1 The difference ΔT 排气2 >T 排气温差2 If the temperature is high enough, then defrosting begins; otherwise, check the outdoor unit's heat exchanger coil temperature T. 外管 If the outdoor unit heat exchanger coil temperature T 外管 Once the defrosting temperature is reached, defrosting begins, i.e., step S10 is executed.

[0120] It should be noted that if the outdoor environment is under low temperature and high humidity conditions, and the indoor unit's heat exchanger coil temperature and compressor discharge temperature decrease significantly, it indicates that the outdoor unit's heat exchanger has accumulated a lot of frost, which has affected the indoor unit's heating performance. In this case, defrosting is necessary to melt the frost layer on the outdoor unit's heat exchanger. Simultaneously, when it is determined that the amount of frost on the outdoor unit's heat exchanger is increasing, defrosting should begin to melt all the frost, preventing accumulated frost from affecting subsequent heating performance. Also, T 内管温差2 >T 内管温差1 T 排气温差2 >T 排气温差1 .

[0121] In the present invention, the determination of whether defrosting is required is supplemented by the detection and judgment of the indoor unit heat exchanger coil temperature and the compressor exhaust temperature. By detecting the indoor unit heat exchanger coil temperature, the compressor exhaust temperature and the outdoor unit heat exchanger coil temperature, the air conditioner is determined to determine whether defrosting is required, thereby improving the accuracy of the determination and control of whether defrosting is required. This ensures that the frost layer on the outdoor unit heat exchanger can be completely melted under the low temperature and high humidity outdoor environment, while also ensuring the heating effect of the air conditioner and improving the user's heating comfort.

[0122] In some embodiments, the control unit 104 determines whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger, including: The control unit 104 is further configured to determine whether the pipe temperature of the outdoor unit heat exchanger is lower than a preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner's outdoor ambient temperature belongs. The specific functions and processing of this control unit 104 are further described in step S510.

[0123] The control unit 104 is further configured to determine that the air conditioner needs to enter defrost mode if it is determined that the pipe temperature of the outdoor unit heat exchanger is lower than a preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner belongs. The specific functions and processing of this control unit 104 are further described in step S520.

[0124] like Figure 7 As shown, a defrosting control method for an air conditioner under low temperature and high humidity outdoor conditions further includes: step S10, detecting the outdoor unit heat exchanger coil temperature T. 外管 If the outdoor unit heat exchanger coil temperature T 外管 Once the defrosting temperature is reached, defrosting begins. If, by detecting and comparing the compressor discharge temperature and the indoor unit heat exchanger coil temperature at different times, it is found that the compressor discharge temperature and the indoor unit heat exchanger coil temperature have not decreased significantly, it indicates that the amount of frost on the outdoor unit heat exchanger has not increased. By detecting the outdoor unit heat exchanger coil temperature, it can be determined whether defrosting is necessary, thus achieving a thorough defrosting effect.

[0125] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0126] According to an embodiment of the present invention, an air conditioner corresponding to an air conditioner control device is also provided. This air conditioner may include the air conditioner control device described above.

[0127] Since the processing and functions implemented by the air conditioner in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned device, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0128] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided, including a computer program that, when executed by a processor, implements the steps of the air conditioner control method described above.

[0129] Since the processing and functions implemented by the product in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0130] According to an embodiment of the present invention, a storage medium corresponding to an air conditioner control method is also provided, the storage medium including a stored program, wherein, when the program is executed, the device where the storage medium is located controls the execution of the steps of the air conditioner control method described above.

[0131] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0132] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0133] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that, The air conditioner has a compressor, an outdoor unit heat exchanger, and an indoor unit heat exchanger; The air conditioner control method includes: When the air conditioner is turned on and running in heating mode, the outdoor ambient temperature, the outdoor ambient humidity, the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor are obtained. The control condition for determining whether the air conditioner needs to enter defrost mode is the first condition or the second condition, based on the outdoor ambient temperature and humidity of the air conditioner. Based on the control conditions for whether the air conditioner needs to enter defrost mode, and in combination with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor, it is determined whether the air conditioner needs to enter defrost mode. If it is determined that the air conditioner needs to enter defrost mode, then control the air conditioner to enter defrost mode.

2. The air conditioning control method according to claim 1, characterized in that, in, The first condition is to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger; the second condition is to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and in combination with the pipe temperature of the outdoor unit heat exchanger. The control conditions for determining whether the air conditioner needs to enter defrost mode, based on the outdoor ambient temperature and humidity of the air conditioner, are either a first condition or a second condition, including: Determine whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold. If it is determined that the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold, then the control condition for determining whether the air conditioner needs to enter the defrost mode is the first condition. If it is determined that the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold and the outdoor ambient humidity of the air conditioner is greater than or equal to a preset outdoor humidity threshold, then the control condition for determining whether the air conditioner needs to enter the defrost mode is the second condition.

3. The air conditioning control method according to claim 1 or 2, characterized in that, Based on the control conditions for whether the air conditioner needs to enter defrost mode, and in conjunction with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the discharge temperature of the compressor, the determination of whether the air conditioner needs to enter defrost mode includes: If the control condition for determining whether the air conditioner needs to enter defrost mode is the first condition, then the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger. If the control condition for determining whether the air conditioner needs to enter defrost mode is the second condition, then the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger, the exhaust temperature of the compressor, and the pipe temperature of the outdoor unit heat exchanger.

4. The air conditioning control method according to claim 2 or 3, characterized in that, Based on the pipe temperature of the indoor unit heat exchanger and the discharge temperature of the compressor, and in conjunction with the pipe temperature of the outdoor unit heat exchanger, determine whether the air conditioner needs to enter defrost mode, including: The pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been turned on and has been running for a first set time is recorded as the first pipe temperature of the indoor unit heat exchanger; the discharge temperature of the compressor obtained after the air conditioner has been turned on and has been running for a first set time is recorded as the first discharge temperature of the compressor. The pipe temperature of the indoor unit heat exchanger, obtained after the air conditioner has been turned on and running for a second set time, is recorded as the second pipe temperature of the indoor unit heat exchanger; the discharge temperature of the compressor, obtained after the air conditioner has been turned on and running for a second set time, is recorded as the second discharge temperature of the compressor; the second set time is longer than the first set time. The difference between the first pipe temperature and the second pipe temperature of the indoor unit heat exchanger is determined and recorded as the first pipe temperature difference value of the indoor unit heat exchanger; and the difference between the first discharge temperature and the second discharge temperature of the compressor is determined and recorded as the first discharge temperature difference value of the compressor. Determine whether the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold, and whether the first exhaust temperature difference of the compressor is less than the first preset exhaust temperature threshold. If it is determined that the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold and the first exhaust temperature difference of the compressor is less than the first preset exhaust temperature threshold, then the air conditioner is controlled to continue running in heating mode, and the air conditioner is further controlled to enter defrosting mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor. If it is determined that the first pipe temperature difference of the indoor heat exchanger is less than the first preset indoor unit pipe temperature threshold and the first exhaust temperature difference of the compressor is less than the first preset exhaust temperature threshold, then it is determined whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger.

5. The air conditioning control method according to claim 4, characterized in that, Continue to determine whether the air conditioner needs to enter defrost mode based on the pipe temperature of the indoor unit heat exchanger and the exhaust temperature of the compressor, including: The pipe temperature of the indoor unit heat exchanger obtained after the air conditioner has been turned on and has been running for a third set time is recorded as the third pipe temperature of the indoor unit heat exchanger; the discharge temperature of the compressor obtained after the air conditioner has been turned on and has been running for a third set time is recorded as the third discharge temperature of the compressor; the third set time is longer than the second set time. The difference between the second pipe temperature and the third pipe temperature of the indoor unit heat exchanger is determined and recorded as the second pipe temperature difference value of the indoor unit heat exchanger; and the difference between the second discharge temperature and the third discharge temperature of the compressor is determined and recorded as the second discharge temperature difference value of the compressor. Determine whether the following conditions are met: the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold, and the second exhaust temperature difference of the compressor is greater than the second preset exhaust temperature threshold; the second preset indoor unit pipe temperature threshold is greater than the first preset indoor unit pipe temperature threshold, and the second preset exhaust temperature threshold is greater than the first preset exhaust temperature threshold. If it is determined that the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold and the second exhaust temperature difference of the compressor is greater than the first preset exhaust temperature threshold, then it is determined that the air conditioner needs to enter the defrosting mode. If it is determined that the second pipe temperature difference of the indoor heat exchanger is greater than the second preset indoor unit pipe temperature threshold and the second exhaust temperature difference of the compressor is greater than the first preset exhaust temperature threshold, then it is determined whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit heat exchanger.

6. The air conditioning control method according to any one of claims 2 to 5, characterized in that, Determining whether the air conditioner needs to enter defrost mode based on the pipe temperature of the outdoor unit's heat exchanger includes: Determine whether the pipe temperature of the outdoor unit heat exchanger is lower than the preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner belongs; If it is determined that the pipe temperature of the outdoor unit heat exchanger is less than the preset outdoor unit pipe temperature threshold corresponding to the outdoor ambient temperature range to which the air conditioner belongs, then it is determined that the air conditioner needs to enter defrost mode.

7. A control device for an air conditioner, characterized in that, The air conditioner has a compressor, an outdoor unit heat exchanger, and an indoor unit heat exchanger; The control device for the air conditioner includes: The acquisition unit is configured to acquire the outdoor ambient temperature of the air conditioner, the outdoor ambient humidity of the air conditioner, the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor when the air conditioner is turned on and running in heating mode. The control unit is configured to determine, based on the outdoor ambient temperature and the outdoor ambient humidity of the air conditioner, whether the control condition for the air conditioner to enter defrost mode is a first condition or a second condition. The control unit is further configured to determine whether the air conditioner needs to enter defrost mode based on the control conditions of whether the air conditioner needs to enter defrost mode, combined with the pipe temperature of the outdoor unit heat exchanger, the pipe temperature of the indoor unit heat exchanger, and the exhaust temperature of the compressor. The control unit is also configured to control the air conditioner to enter defrost mode if it is determined that the air conditioner needs to enter defrost mode.

8. An air conditioner, characterized in that, include: The air conditioning control device as described in claim 7.

9. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the air conditioning control method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the air conditioning control method according to any one of claims 1 to 6.

Images