Air conditioner control method, air conditioner, and nonvolatile storage medium

Abstract

The application provides an air conditioner control method, an air conditioner and a nonvolatile storage medium. The air conditioner control method comprises the following steps: detecting an outdoor environment temperature T 外 , so as to control an outdoor fan of an air conditioner outdoor unit of the air conditioner to operate at a preset rotating speed or a normal rotating speed according to the outdoor environment temperature T 外 , wherein the normal rotating speed is greater than the preset rotating speed; after the outdoor fan operates at the preset rotating speed and a compressor of the air conditioner operates for a first preset time period, a method for controlling the rotating speed of the outdoor fan comprises the following steps: detecting an indoor environment temperature T 内 and a module temperature T 模块 of a controller mainboard of an air conditioner indoor unit of the air conditioner, so as to control the rotating speed of the outdoor fan according to the indoor environment temperature T 内 and the module temperature T 模块 ; and / or detecting an outer pipe temperature T 外管 of a heat exchange pipe of an outdoor heat exchanger, so as to control the rotating speed of the outdoor fan according to the outer pipe temperature T 外管 . The application solves the problem of poor reliability of operation of the air conditioner in the prior art.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioning control method, an air conditioner, and a non-volatile storage medium. Background Technology

[0002] Comfort-type base station air conditioners are commonly used to cool equipment. Base station air conditioners include indoor and outdoor units. The indoor unit includes an electrical box. Due to poor heat dissipation in the electrical box, heat accumulation inside the electrical box can significantly reduce component reliability. Refrigerant cooling is a commonly used heat dissipation method. Specifically, the low-temperature, high-pressure refrigerant, after being condensed by the condenser and before being throttled by the throttling device, is introduced into the radiator. The radiator is located inside the electrical box and contacts the main control board inside the electrical box. The low-temperature, high-pressure refrigerant is then introduced into the main control board inside the electrical box to dissipate heat from the main control board.

[0003] However, since the condenser of the air conditioner is located outdoors, and the base station air conditioner has a long-term need for low-temperature cooling, the outdoor temperature can easily affect the refrigerant temperature when the base station air conditioner is cooling. The excessively low outdoor ambient temperature can cause the refrigerant temperature to be too low, resulting in a lower temperature of the refrigerant flowing into the radiator. This leads to a large temperature difference between the radiator temperature, the controller motherboard temperature and the indoor ambient temperature, which can cause condensation to easily form on the radiator and the controller motherboard. Consequently, the controller motherboard and other components located in the electrical box are prone to damage.

[0004] Furthermore, most of these base station air conditioners are placed in unattended locations. To prevent the compressor and controller from being stolen, the compressor is usually placed indoors. In this case, if the outdoor temperature is too low, the temperature of the refrigerant flowing into the evaporator indoors may also be too low, which may cause the evaporator to freeze. This will reduce the suction temperature of the compressor and result in insufficient superheat at the bottom of the compressor, thus making the compressor's operation unreliable. Summary of the Invention

[0005] The main objective of this invention is to provide an air conditioning control method, an air conditioner, and a non-volatile storage medium to solve the problem of poor reliability in the operation of air conditioners in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, an air conditioning control method is provided, comprising: detecting an outdoor ambient temperature T. 外 Based on the outdoor ambient temperature T 外The outdoor fan of the air conditioner's outdoor unit is controlled to operate at a preset speed or normal speed, wherein the normal speed is greater than the preset speed. After the outdoor fan has been operating at the preset speed and the air conditioner's compressor has been running for a first preset time period, the method for controlling the outdoor fan speed includes: detecting the indoor ambient temperature T. 内 The module temperature T of the main control board of the indoor unit of the air conditioner. 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 Control the speed of the outdoor fan; and / or, detect the outer tube temperature T of the heat exchanger tubes of the outdoor heat exchanger. 外管 According to the temperature T of the outer tube 外管 Control the speed of the external fan.

[0007] Furthermore, the air conditioning control method includes: determining the outdoor ambient temperature T. 外 Is it lower than the first preset temperature value? If the outdoor ambient temperature T 外 If the temperature is lower than the first preset temperature value, control the outdoor fan to run at the preset speed; otherwise, control the outdoor fan to run at the normal speed.

[0008] Furthermore, the air conditioning control method includes: when the outdoor ambient temperature T 外 The outdoor ambient temperature is less than the first preset temperature value and the outdoor ambient temperature T 外 When the outdoor temperature is greater than or equal to the second preset temperature value, the outdoor fan is controlled to operate at the first preset speed; when the outdoor ambient temperature T 外 The outdoor ambient temperature is less than the second preset temperature value and the outdoor ambient temperature T 外 When the outdoor temperature is greater than or equal to the third preset temperature value, the outdoor fan is controlled to operate at the second preset speed; when the outdoor ambient temperature T 外 When the temperature is below the third preset temperature value, the outdoor fan is controlled to run at the third preset speed; wherein, the first preset speed > the second preset speed > the third preset speed.

[0009] Furthermore, the first preset speed ranges from 140 rpm to 160 rpm; and / or, the second preset speed ranges from 190 rpm to 210 rpm; and / or, the third preset speed ranges from 290 rpm to 310 rpm; and / or, the first preset temperature is 20℃; and / or, the second preset temperature is 10℃; and / or, the third preset temperature is 3℃.

[0010] Furthermore, after the outdoor fan has been running at a preset speed and the compressor has been running for a first preset time period, the air conditioning control method also includes: determining the module temperature T. 模块 Is it less than the fourth preset temperature value? If the module temperature T 模块 If the temperature is lower than the fourth preset temperature value, the outdoor fan will stop operating; when the module temperature T... 模块When the outdoor ambient temperature T is greater than or equal to the fifth preset temperature value, re-detect the outdoor ambient temperature T. 外 And according to the outdoor ambient temperature T 外 Control the external fan to run at a preset speed; when the module temperature T 模块 Less than the fifth preset temperature value, and the module temperature T 模块 When the temperature exceeds the fourth preset temperature value, the external fan will continue to operate at the preset speed.

[0011] Furthermore, when the indoor ambient temperature T 内 If the temperature is greater than the sixth preset temperature value, set the fourth preset temperature value to the sixth preset temperature value; otherwise, set the fourth preset temperature value to the indoor ambient temperature T. 内 Wherein, the sixth preset temperature value is less than the fifth preset temperature value and the sixth preset temperature value is greater than the first preset temperature value; and / or, the fifth preset temperature value is 80℃.

[0012] Furthermore, the sixth preset temperature value is 30℃.

[0013] Furthermore, at module temperature T 模块 After the temperature drops below the fifth preset temperature value, the air conditioning control method also includes: calculating the temperature difference ΔT = module temperature T. 模块 -Indoor ambient temperature T 内 The speed of the external fan is controlled according to the temperature difference ΔT.

[0014] Furthermore, the air conditioning control method also includes: determining whether the temperature difference ΔT is greater than or equal to the ninth preset temperature value; if the temperature difference ΔT is greater than or equal to the ninth preset temperature value, controlling the outdoor fan to maintain a preset speed or normal speed; otherwise, based on the preset speed or normal speed, controlling the outdoor fan to reduce the preset speed value every third preset time interval; wherein, the ninth preset temperature value is greater than 0.

[0015] Furthermore, the air conditioning control method also includes: when the temperature difference ΔT is less than the ninth preset temperature value and the temperature difference ΔT is greater than or equal to the tenth preset temperature value, controlling the outdoor fan to reduce the first preset speed value every third preset time interval; when the temperature difference ΔT is less than the tenth preset temperature value, controlling the outdoor fan to reduce the second preset speed value every third preset time interval; wherein, the first preset speed value is less than the second preset speed value.

[0016] Furthermore, the ninth preset temperature value is 2℃; and / or, the tenth preset temperature value is -3℃; and / or, the third preset time period is 5min; and / or, the first preset speed value ranges from 45rpm to 55rpm; and / or, the second preset speed value ranges from 90rpm to 110rpm.

[0017] Furthermore, the air conditioning control method also includes: determining the external pipe temperature T. 外管 Is it greater than the seventh preset temperature value? If the outer tube temperature T 外管 If the outdoor ambient temperature T is greater than the seventh preset temperature value, re-detect the outdoor ambient temperature. 外 Based on the outdoor ambient temperature T 外 Control the outdoor fan to run at a preset speed; otherwise, detect the indoor ambient temperature T. 内 and module temperature T 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 Control the speed of the external fan.

[0018] Furthermore, the air conditioning control method also includes: determining the external pipe temperature T. 外管 Is it greater than or equal to the eighth preset temperature value? If the outer tube temperature T 外管 If the temperature is greater than or equal to the eighth preset temperature value, the external fan will be controlled to run at normal speed.

[0019] Furthermore, after the outdoor fan has been running at its normal operating speed for a second preset time period, the air conditioning control method further includes: re-detecting the outdoor ambient temperature T. 外 Based on the outdoor ambient temperature T 外 Control the outdoor fan of the air conditioner's outdoor unit to operate at the preset speed or normal speed.

[0020] According to a second aspect of the present invention, an air conditioner is provided, comprising an indoor unit and an outdoor unit, suitable for the aforementioned air conditioning control method. The air conditioner includes: a first detection module disposed on the outdoor unit to detect the outdoor ambient temperature T. 外 Based on the outdoor ambient temperature T 外 The outdoor unit's fan is controlled to operate at a preset speed or normal speed; the second detection module, located on the main control board of the indoor unit, detects the indoor ambient temperature T. 内 The module temperature T of the main control board of the indoor unit of the air conditioner. 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 The system controls the speed of the outdoor fan; the third detection module is installed on the outdoor heat exchanger of the air conditioner's outdoor unit to detect the outer tube temperature T of the heat exchanger's heat exchange tubes. 外管 According to the outer tube temperature T 外管 Control the speed of the external fan.

[0021] According to a third aspect of the present invention, a non-volatile storage medium is provided, the non-volatile storage medium including a stored program, wherein the program executes the above-described air conditioning control method.

[0022] Applying the technical solution of this invention, this invention provides an air conditioning control method, comprising: detecting the outdoor ambient temperature T 外 Based on the outdoor ambient temperature T 外 The outdoor fan of the air conditioner's outdoor unit is controlled to operate at a preset speed or a normal speed, wherein the normal speed is greater than the preset speed. This application controls the outdoor fan speed based on the outdoor ambient temperature, ensuring that the refrigerant temperature in the outdoor heat exchanger changes according to the fan speed. This keeps the refrigerant temperature within the heat exchanger within a suitable range, preventing the refrigerant temperature received by the indoor unit's controller board from becoming too low. Consequently, the controller board temperature does not fall below the dew point temperature, preventing condensation on the controller board and reducing the risk of damage to the controller board located in the radiator, electrical box, and the controller itself. After the outdoor fan has been running at the preset speed and the air conditioner's compressor has been running for a first preset time period, the method for controlling the outdoor fan speed includes: detecting the indoor ambient temperature T. 内 The module temperature T of the main control board of the indoor unit of the air conditioner. 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 Control the speed of the outdoor fan; and / or, detect the outer tube temperature T of the heat exchanger tubes of the outdoor heat exchanger. 外管 According to the temperature T of the outer tube 外管 The outdoor fan speed is controlled. Through the above settings, the outdoor fan speed can be controlled and adjusted by combining the indoor ambient temperature, the module temperature of the controller main board, the outer tube temperature of the heat exchanger tubes of the outdoor heat exchanger, and the outdoor ambient temperature. This corrects the outdoor fan speed, further preventing condensation on the controller main board and making the radiator, electrical box, and the controller main board located in the electrical box less prone to damage. Furthermore, it ensures sufficient superheat for the compressor. In summary, the air conditioning control method of this application guarantees the reliability of the air conditioner's operation. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 A flowchart illustrating an embodiment of the air conditioning control method according to the present invention is shown; and

[0025] Figure 2 A schematic diagram of the system principle of an embodiment of an air conditioner according to the present invention is shown.

[0026] The above figures include the following reference numerals:

[0027] 10. Outdoor fan; 20. Compressor; 30. Controller mainboard; 40. Outdoor heat exchanger; 50. Radiator; 60. Indoor heat exchanger; 101. First throttling device; 102. Second throttling device; 70. Four-way valve. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Please refer to Figure 1 The present invention provides an air conditioning control method, comprising: detecting the outdoor ambient temperature T 外 Based on the outdoor ambient temperature T 外 The outdoor fan 10 of the air conditioner's outdoor unit is controlled to operate at a preset speed or a normal speed, wherein the normal speed is greater than the preset speed. This application controls the speed of the outdoor fan 10 based on the outdoor ambient temperature, ensuring that the refrigerant temperature in the outdoor heat exchanger of the air conditioner changes according to the fan speed. This keeps the refrigerant temperature within the outdoor heat exchanger within a suitable range, preventing the refrigerant temperature received by the controller mainboard 30 of the indoor unit from becoming too low. Consequently, the temperature of the controller mainboard 30 will not fall below the dew point temperature, preventing condensation from forming on the controller mainboard 30 and reducing the risk of damage to the radiator, electrical box, and controller mainboard within the electrical box of the air conditioner. After the outdoor fan 10 operates at the preset speed and the air conditioner's compressor 20 has run for a first preset time period, the method for controlling the speed of the outdoor fan 10 includes: detecting the indoor ambient temperature T. 内 The temperature module T of the main board of the air conditioner indoor unit controller. 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 Control the speed of the outdoor fan 10; and / or detect the outer tube temperature T of the heat exchange tubes of the outdoor heat exchanger 40. 外管 According to the temperature T of the outer tube 外管 The speed of the outdoor fan 10 is controlled. Through the above settings, the speed of the outdoor fan can be controlled and adjusted by combining the indoor ambient temperature, the module temperature of the controller main board, the outer tube temperature of the heat exchanger tube of the outdoor heat exchanger, and the outdoor ambient temperature. This corrects the speed of the outdoor fan, further preventing condensation on the controller main board 30 and making the control main board of the controller located in the radiator, electrical box, and electrical box less prone to damage. Furthermore, it ensures sufficient superheat for the compressor. In summary, the air conditioning control method of this application guarantees the reliability of the air conditioner's operation.

[0030] The air conditioning control method of this application is applicable to base station air conditioners; the normal speed is the speed of the air conditioner in normal cooling operation mode.

[0031] Specifically, the air conditioning control method includes: determining the outdoor ambient temperature T. 外 Is it lower than the first preset temperature value? If the outdoor ambient temperature T 外 If the temperature is lower than the first preset temperature value, control the outdoor fan 10 to run at the preset speed; otherwise, control the outdoor fan 10 to run at the normal speed.

[0032] Among them, when the outdoor ambient temperature T 外 When the temperature is lower than the first preset temperature value, the air conditioner is in a low-temperature cooling operation state. If the outdoor fan 10 is running at normal speed, it is easily affected by the low outdoor temperature environment inside the outdoor heat exchanger, which makes the high pressure of the air conditioner system too low and easily causes the indoor heat exchanger to freeze, resulting in insufficient superheat of the compressor. Therefore, the outdoor fan 10 is controlled to run at a preset speed lower than the normal speed to ensure the high pressure of the air conditioner system.

[0033] Specifically, the air conditioning control method includes: when the outdoor ambient temperature T 外 The outdoor ambient temperature is less than the first preset temperature value and the outdoor ambient temperature T 外 When the outdoor temperature is greater than or equal to the second preset temperature value, the outdoor fan 10 is controlled to operate at the first preset speed; when the outdoor ambient temperature T 外 The outdoor ambient temperature is less than the second preset temperature value and the outdoor ambient temperature T 外 When the outdoor temperature is greater than or equal to the third preset temperature value, the outdoor fan 10 is controlled to operate at the second preset speed; when the outdoor ambient temperature T 外 When the temperature is lower than the third preset temperature value, the external fan 10 is controlled to run at the third preset speed; wherein, the first preset speed > the second preset speed > the third preset speed.

[0034] In this application, the first preset speed ranges from 140 rpm to 160 rpm; and / or, the second preset speed ranges from 190 rpm to 210 rpm; and / or, the third preset speed ranges from 290 rpm to 310 rpm; and / or, the first preset temperature is 20°C; and / or, the second preset temperature is 10°C; and / or, the third preset temperature is 3°C.

[0035] In the embodiments of this application, the first preset speed is 150 rpm, the second preset speed is 200 rpm, and the third preset speed is 300 rpm.

[0036] When the air conditioner is in low-temperature cooling operation, the temperature of the refrigerant flowing out of the outdoor unit is low, and the temperature of the refrigerant flowing through the radiator 50 of the air conditioner is also low. This can easily cause the temperature of the radiator 50, the electrical box, and the main board of the controller located in the electrical box to be low, thus below the dew point temperature. This makes it easy for condensation to form on the radiator and the main board of the controller. This application controls the outdoor fan to operate at different speeds according to different ranges of outdoor ambient temperature to ensure that the temperature of the refrigerant flowing out of the condenser is not too low, so as to prevent the temperature on the radiator and the main board of the controller from falling below the dew point temperature. This prevents condensation from forming on the radiator and the main board of the controller, thereby preventing the main board of the controller from burning out and improving the reliability of the air conditioner operation.

[0037] In this application, after the outdoor fan 10 operates at a preset speed and the compressor 20 has been running for a first preset time period, the air conditioning control method further includes: determining the module temperature T. 模块 Is it less than the fourth preset temperature value? If the module temperature T 模块 If the temperature is lower than the fourth preset temperature value, the outdoor fan 10 will stop operating. At this point, the temperature on the controller mainboard is already low enough, and there is no need to further reduce the temperature. If the temperature continues to drop, the temperature of the controller mainboard may fall below the indoor dew point temperature, causing condensation to form on the controller mainboard. Therefore, the outdoor fan 10 is stopped at this time to prevent the refrigerant flowing from the outdoor heat exchanger to the controller mainboard from becoming too cold. When the module temperature T... 模块 When the outdoor ambient temperature T is greater than or equal to the fifth preset temperature value, re-detect the outdoor ambient temperature T. 外 And according to the outdoor ambient temperature T 外 When the outdoor fan 10 is controlled to run at a preset speed, the controller motherboard temperature is high, and the speed of the outdoor fan 10 may be inappropriate. Therefore, it is necessary to re-detect the outdoor ambient temperature and re-control the outdoor fan to run at a suitable speed to ensure good heat dissipation of the controller motherboard. When the module temperature T... 模块 Less than the fifth preset temperature value, and the module temperature T 模块 When the temperature exceeds the fourth preset temperature value, the outdoor fan 10 is maintained at a preset speed. At this point, the module temperature is suitable, indicating that the temperature of the refrigerant used for heat dissipation is also suitable; therefore, there is no need to adjust the outdoor fan speed. This application, through the aforementioned air conditioning control method, ensures good heat dissipation of the controller motherboard in the electrical box while preventing condensation on the controller motherboard and also prevents condensation from forming on the screws connecting the controller motherboard 30 and the radiator, thereby ensuring the reliability of the air conditioner's operation. The first preset time period is 5 minutes.

[0038] Specifically, after the compressor stops running, the compressor's running time period is cleared, and the timer restarts from zero the next time the compressor starts.

[0039] Specifically, when the indoor ambient temperature T 内 If the temperature is greater than the sixth preset temperature value, set the fourth preset temperature value to the sixth preset temperature value; otherwise, set the fourth preset temperature value to the indoor ambient temperature T. 内 In this way, while ensuring that the temperature of the controller motherboard does not get too high, the module temperature T is also guaranteed. 模块 The temperature is greater than or equal to the indoor ambient temperature to ensure the normal operation of the controller motherboard; wherein the sixth preset temperature value is less than the fifth preset temperature value and the sixth preset temperature value is greater than the first preset temperature value; and / or, the fifth preset temperature value is 80℃.

[0040] In the embodiments of this application, since the indoor humidity is relatively low when the indoor ambient temperature is above 30°C, that is, the situation of high temperature and high humidity is relatively rare, the sixth preset temperature value of this application is 30°C.

[0041] In this application, the air conditioning control method further includes: determining the external pipe temperature T. 外管 Is it greater than the seventh preset temperature value? If the outer tube temperature T 外管 If the outdoor ambient temperature T is greater than the seventh preset temperature value, re-detect the outdoor ambient temperature. 外 Based on the outdoor ambient temperature T 外 Control the outdoor fan 10 to run at a preset speed; otherwise, detect the indoor ambient temperature T. 内 and module temperature T 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 Control the speed of the external fan 10.

[0042] The seventh preset temperature value is 50℃. If the outer tube temperature T 外管 If the temperature exceeds the seventh preset temperature value, it indicates that the refrigerant temperature of the outdoor heat exchanger is not low enough to achieve the cooling effect. Therefore, it is necessary to re-detect the outdoor ambient temperature to ensure that the outdoor fan operates at an appropriate speed so that the outdoor heat exchanger has the appropriate cooling capacity.

[0043] In the embodiments of this application, at module temperature T 模块 After the temperature falls below the fifth preset temperature value, the air conditioning control method further includes: calculating the temperature difference ΔT = module temperature T. 模块 -Indoor ambient temperature T 内 The speed of the outdoor fan 10 is controlled according to the temperature difference ΔT. Since condensation occurs because the temperature of the controller motherboard is lower than the indoor dew point temperature, this application, through the above control method, can more intuitively determine the likelihood of condensation generation on the controller motherboard. In this application, after determining T... 模块In addition to determining the relationship between the fourth and fifth preset temperature values, it is also necessary to determine whether the temperature difference ΔT is within the predetermined range before controlling the speed of the outdoor fan to improve the accuracy of the air conditioner's anti-condensation function.

[0044] Specifically, the air conditioning control method further includes: determining whether the temperature difference ΔT is greater than or equal to a ninth preset temperature value; if the temperature difference ΔT is greater than or equal to the ninth preset temperature value, controlling the outdoor fan 10 to maintain a preset speed or normal speed; otherwise, based on the preset speed or normal speed, controlling the outdoor fan 10 to reduce the preset speed value every third preset time interval; wherein, the ninth preset temperature value is greater than 0. If the temperature difference ΔT is greater than or equal to the ninth preset temperature value, it indicates that the module temperature T 模块 The temperature is higher than the indoor ambient temperature. At this temperature, the controller motherboard is less likely to produce condensation. Therefore, it indicates that the temperature of the controller motherboard and the temperature of the refrigerant flowing out of the outdoor heat exchanger are suitable, so there is no need to adjust the speed of the outdoor fan.

[0045] Furthermore, the air conditioning control method also includes: when the temperature difference ΔT is less than the ninth preset temperature value and the temperature difference ΔT is greater than or equal to the tenth preset temperature value, controlling the outdoor fan 10 to reduce the first preset speed value every third preset time interval. This indicates that the module temperature is low and may be lower than the indoor dew point temperature, so the outdoor fan speed is reduced at this time to prevent the refrigerant temperature from being too low; when the temperature difference ΔT is less than the tenth preset temperature value, controlling the outdoor fan 10 to reduce the second preset speed value every third preset time interval. This indicates that the module temperature is very low and is very likely to be lower than the indoor dew point temperature, so the outdoor fan speed is reduced at this time to prevent the refrigerant temperature from being too low; wherein, the first preset speed value is less than the second preset speed value.

[0046] Specifically, when the temperature difference ΔT is less than the ninth preset temperature value and the temperature difference ΔT is greater than or equal to the tenth preset temperature value, the outdoor fan 10 is controlled to reduce the first preset speed value every third preset time interval until the temperature difference rises to greater than or equal to the ninth preset temperature value. At this time, if the speed of the outdoor fan reaches the minimum speed, the outdoor fan is controlled to stop running. Similarly, when the temperature difference ΔT is less than the tenth preset temperature value, the outdoor fan 10 is controlled to reduce the second preset speed value every third preset time interval until the temperature difference rises to greater than or equal to the ninth preset temperature value. At this time, if the speed of the outdoor fan reaches the minimum speed, the outdoor fan is controlled to stop running.

[0047] Specifically, the ninth preset temperature value is 2℃; and / or, the tenth preset temperature value is -3℃; and / or, the third preset time period is 5min; and / or, the first preset speed value ranges from 45rpm to 55rpm; and / or, the second preset speed value ranges from 90rpm to 110rpm.

[0048] In the embodiments of this application, the first preset speed value is 50 rpm, and the second preset speed value is 100 rpm, as shown in Table 1 below:

[0049] Table 1

[0050]

[0051] In this application, the air conditioning control method further includes: determining the external pipe temperature T. 外管 Is it greater than or equal to the eighth preset temperature value? If the outer tube temperature T 外管 If the temperature is greater than or equal to the eighth preset temperature value, it means that the refrigerant temperature of the outdoor heat exchanger is too high to achieve cooling, so the outdoor fan is controlled to run at normal speed.

[0052] Where, if T 外管 If the temperature is lower than the eighth preset temperature value, then at least one of the following methods for controlling the speed of the external fan will be executed:

[0053] 1) Detect the indoor ambient temperature T 内 The temperature module T of the main board of the air conditioner indoor unit controller. 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 Control the speed of the external fan 10;

[0054] 2) Detect the outer tube temperature T of the heat exchange tubes of the outdoor heat exchanger 40. 外管 According to the temperature T of the outer tube 外管 Control the speed of the external fan 10.

[0055] Furthermore, after the outdoor fan 10 operates at its normal speed and after the second preset operating time period, the air conditioning control method further includes: re-detecting the outdoor ambient temperature T. 外 Based on the outdoor ambient temperature T 外 The outdoor fan 10 of the air conditioner's outdoor unit is controlled to operate at a preset speed or normal speed. At this time, for an air conditioner in cooling mode, the temperature of the outdoor heat exchanger is suitable, and the speed of the outdoor fan does not need to be too high. Therefore, it is necessary to judge the outdoor ambient temperature again to control the speed of the outdoor fan. The second preset time period is 5 minutes.

[0056] Please refer to Figure 2 This invention provides an air conditioner, including an indoor unit and an outdoor unit, applicable to the aforementioned air conditioning control method. The air conditioner includes: a first detection module, disposed on the outdoor unit, for detecting the outdoor ambient temperature T. 外 Based on the outdoor ambient temperature T 外The outdoor fan 10 of the air conditioner outdoor unit is controlled to operate at a preset speed or normal speed; the second detection module is set on the main board 30 of the air conditioner indoor unit to detect the indoor ambient temperature T. 内 The temperature module T of the main board of the air conditioner indoor unit controller. 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 The speed of the outdoor fan 10 is controlled; the third detection module is installed on the outdoor heat exchanger 40 of the outdoor unit of the air conditioner to detect the outer tube temperature T of the heat exchanger tube of the outdoor heat exchanger 40. 外管 According to the outer tube temperature T 外管 Control the speed of the external fan 10.

[0057] Specifically, the air conditioner also includes a radiator 50, an indoor heat exchanger 60, a first throttling device 101, a second throttling device 102, and a four-way valve 70. The radiator 50 is located between the first throttling device 101 and the second throttling device 102. The first throttling device 101 is in a fully open state so that the radiator 50 introduces the unthrottled refrigerant into the electrical box to dissipate heat from the electrical box. The first throttling device 101 does not throttle in order to prevent the temperature of the refrigerant entering the heat dissipation pipe of the radiator 50 from being too low, which would cause condensation on the main board of the controller in the electrical box.

[0058] However, in low-temperature cooling operation, it is difficult to completely solve the temperature problem of condensation on the main board of the controller by simply adjusting the first throttling device 101 and the second throttling device 102. Therefore, this application proposes the above-mentioned air conditioning control method.

[0059] Since the subcooled area is located below the outdoor unit of the air conditioner, the air conditioning control method of this application mainly controls the lower fan in a dual-fan outdoor unit. This results in a lower fan speed, leading to better anti-condensation performance for the entire unit. Because indoor and outdoor temperatures are easily affected by the environment, typically both indoor and outdoor temperatures hysteresis by 2°C, during the execution of the air conditioning control method of this application, if the difference between the current indoor / outdoor temperature ratio and the previously detected indoor / outdoor temperature ratio is less than or equal to 2°C, the operation of the air conditioner will not be changed. In this application, when the difference between the current indoor / outdoor ambient temperature ratio and the previously detected ratio is greater than 2°C, the air conditioning control method described above will be used again to determine the operating state of the outdoor fan of the outdoor unit. This increases the accuracy of the air conditioning control method and prevents the outdoor fan speed from fluctuating frequently due to changes in indoor and outdoor ambient temperatures, thus preventing the repeated execution of the air conditioning control method. The outdoor heat exchanger's outer pipe temperature exhibits no hysteresis.

[0060] This application also provides a non-volatile storage medium, which includes a stored program, wherein the program executes the above-described air conditioning control method.

[0061] In summary, the air conditioning control method of this application enables the air conditioner to cool indoor equipment normally even under ultra-low temperature conditions, ensuring the temperature inside the base station. It prevents the air conditioner from failing to cool properly due to condensation on the controller motherboard of the air conditioner's electrical box or insufficient overheating of the evaporator caused by low temperature, thus ensuring the reliable operation of the base station air conditioner and preventing the electrical box of the indoor unit from triggering an overheating alarm.

[0062] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0063] This invention provides an air conditioning control method, comprising: detecting the outdoor ambient temperature T 外 Based on the outdoor ambient temperature T 外 The outdoor fan 10 of the air conditioner's outdoor unit is controlled to operate at a preset speed or a normal speed, wherein the normal speed is greater than the preset speed. This application controls the speed of the outdoor fan 10 based on the outdoor ambient temperature, ensuring that the refrigerant temperature in the outdoor heat exchanger of the air conditioner changes according to the fan speed. This keeps the refrigerant temperature in the outdoor heat exchanger within a suitable range, preventing the refrigerant temperature received by the controller mainboard 30 of the indoor unit from becoming too low, and consequently preventing the temperature of the controller mainboard 30 from falling below the dew point temperature. This prevents condensation from forming on the controller mainboard 30 and reduces the risk of damage to the controller mainboard located in the radiator, electrical box, and the controller itself. After the outdoor fan 10 operates at the preset speed and the air conditioner's compressor 20 has run for a first preset time period, the method for controlling the speed of the outdoor fan 10 includes: detecting the indoor ambient temperature T. 内 The temperature module T of the main board of the air conditioner indoor unit controller. 模块 According to the indoor ambient temperature T 内 and module temperature T 模块 Control the speed of the outdoor fan 10; and / or detect the outer tube temperature T of the heat exchange tubes of the outdoor heat exchanger 40. 外管 According to the temperature T of the outer tube 外管The speed of the outdoor fan 10 is controlled. Through the above settings, the speed of the outdoor fan can be controlled and adjusted by combining the indoor ambient temperature, the module temperature of the controller main board, the outer tube temperature of the heat exchanger tube of the outdoor heat exchanger, and the outdoor ambient temperature. This corrects the speed of the outdoor fan, further preventing condensation from forming on the controller main board 30, and making the radiator, electrical box, and the controller main board located in the electrical box less prone to damage. Furthermore, it ensures sufficient superheat for the compressor. In summary, the air conditioning control method of this application guarantees the reliability of the air conditioner's operation.

[0064] The above description is merely a preferred 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 protection of the present invention.

Claims

1. An air conditioning control method, characterized in that, include: Detect outdoor ambient temperature T 外 According to the outdoor ambient temperature T 外 The outdoor fan (10) of the outdoor unit of the air conditioner is controlled to operate at a preset speed or a normal speed, wherein the normal speed is greater than the preset speed; After the outdoor fan (10) operates at the preset speed and the air conditioner compressor (20) has been running for a first preset time period, the method for controlling the speed of the outdoor fan (10) includes: Detecting indoor ambient temperature T 内 The module temperature T of the controller main board (30) of the indoor unit of the air conditioner. 模块 According to the indoor ambient temperature T 内 and the module temperature T 模块 Control the rotational speed of the external fan (10); and / or, The temperature T of the outer tube of the heat exchanger tube of the outdoor heat exchanger (40) is measured. 外管 According to the outer tube temperature T 外管 Control the rotational speed of the external fan (10); After the outdoor fan (10) operates at the preset speed and the compressor (20) operates for a first preset time period, the air conditioning control method further includes: Determine the module temperature T 模块 Is it less than the fourth preset temperature value? If the module temperature T 模块 If the temperature is lower than the fourth preset temperature value, the external fan (10) will be controlled to stop running; When the module temperature T 模块 When the outdoor ambient temperature T is greater than or equal to the fifth preset temperature value, the outdoor ambient temperature T is re-detected. 外 And according to the outdoor ambient temperature T 外 Control the external fan (10) to operate at the preset speed or normal speed; When the module temperature T 模块 The temperature is less than the fifth preset temperature value, and the module temperature T 模块 When the temperature exceeds the fourth preset temperature value, the external fan (10) is maintained at the preset speed. When the indoor ambient temperature T 内 If the temperature is greater than the sixth preset temperature value, then the fourth preset temperature value is made equal to the sixth preset temperature value; otherwise, the fourth preset temperature value is made equal to the indoor ambient temperature T. 内 Wherein, the sixth preset temperature value is less than the fifth preset temperature value, and the sixth preset temperature value is greater than the first preset temperature value.

2. The air conditioning control method according to claim 1, characterized in that, The air conditioning control method includes: Determine the outdoor ambient temperature T 外 Whether it is less than the first preset temperature value, if the outdoor ambient temperature T 外 If the temperature is less than the first preset temperature value, control the external fan (10) to run at the preset speed; otherwise, control the external fan (10) to run at the normal speed.

3. The air conditioning control method according to claim 2, characterized in that, The air conditioning control method includes: When the outdoor ambient temperature T 外 The outdoor ambient temperature T is less than the first preset temperature value. 外 When the temperature is greater than or equal to the second preset temperature value, the external fan (10) is controlled to run at the first preset speed. When the outdoor ambient temperature T 外 The outdoor ambient temperature T is less than the second preset temperature value. 外 When the temperature is greater than or equal to the third preset temperature value, the external fan (10) is controlled to run at the second preset speed. When the outdoor ambient temperature T 外 When the temperature is less than the third preset temperature value, the external fan (10) is controlled to run at the third preset speed. Wherein, the first preset speed > the second preset speed > the third preset speed.

4. The air conditioning control method according to claim 3, characterized in that, The first preset speed ranges from 140 rpm to 160 rpm; and / or, The second preset speed ranges from 190 rpm to 210 rpm; and / or, The third preset speed ranges from 290 rpm to 310 rpm; and / or, The first preset temperature value is 20℃; and / or, The second preset temperature value is 10℃; and / or, The third preset temperature value is 3℃.

5. The air conditioning control method according to claim 1, characterized in that, The fifth preset temperature value is 80℃.

6. The air conditioning control method according to claim 1, characterized in that, The sixth preset temperature value is 30℃.

7. The air conditioning control method according to claim 1, characterized in that, At the module temperature T 模块 After the temperature falls below the fifth preset temperature value, the air conditioning control method further includes: Calculate the temperature difference ΔT = module temperature T 模块 -Indoor ambient temperature T 内 The rotational speed of the external fan (10) is controlled according to the magnitude of the temperature difference ΔT.

8. The air conditioning control method according to claim 7, characterized in that, The air conditioning control method further includes: Determine whether the temperature difference ΔT is greater than or equal to the ninth preset temperature value. If the temperature difference ΔT is greater than or equal to the ninth preset temperature value, control the external fan (10) to maintain the preset speed or the normal speed. Otherwise, based on the preset speed or the normal speed, control the external fan (10) to reduce the preset speed value every third preset time interval. The ninth preset temperature value is greater than 0.

9. The air conditioning control method according to claim 8, characterized in that, The air conditioning control method further includes: When the temperature difference ΔT is less than the ninth preset temperature value and the temperature difference ΔT is greater than or equal to the tenth preset temperature value, the external fan (10) is controlled to reduce the first preset speed value every third preset time interval; When the temperature difference ΔT is less than the tenth preset temperature value, the external fan (10) is controlled to reduce the second preset speed value every third preset time interval; Wherein, the first preset speed value is less than the second preset speed value.

10. The air conditioning control method according to claim 9, characterized in that, The ninth preset temperature value is 2℃; and / or, The tenth preset temperature value is -3℃; and / or, The third preset time period is 5 minutes; and / or, The first preset speed value ranges from 45 rpm to 55 rpm; and / or, The second preset speed value ranges from 90 rpm to 110 rpm.

11. The air conditioning control method according to claim 1, characterized in that, The air conditioning control method further includes: Determine the temperature T of the outer tube 外管 Whether it is greater than the seventh preset temperature value, if the outer tube temperature T 外管 If the outdoor ambient temperature T is greater than the seventh preset temperature value, re-detect the outdoor ambient temperature T. 外 According to the outdoor ambient temperature T 外 Control the outdoor fan (10) to operate at the preset speed or normal speed; otherwise, detect the indoor ambient temperature T. 内 and the module temperature T 模块 According to the indoor ambient temperature T 内 and the module temperature T 模块 Control the rotational speed of the external fan (10).

12. The air conditioning control method according to any one of claims 1 to 11, characterized in that, The air conditioning control method further includes: Determine the temperature T of the outer tube 外管 Whether it is greater than or equal to the eighth preset temperature value, if the outer tube temperature T 外管 If the temperature is greater than or equal to the eighth preset temperature value, the external fan is controlled to operate at the normal speed.

13. The air conditioning control method according to claim 12, characterized in that, After the outdoor fan has been running at its normal operating speed for a second preset time period, the air conditioning control method further includes: Re-detect the outdoor ambient temperature T 外 According to the outdoor ambient temperature T 外 Control the outdoor fan (10) of the outdoor unit of the air conditioner to run at a preset speed or normal speed.

14. An air conditioner, comprising an indoor unit and an outdoor unit, characterized in that, The air conditioning control method applicable to any one of claims 1 to 13, wherein the air conditioner comprises: The first detection module is installed on the outdoor unit of the air conditioner to detect the outdoor ambient temperature T. 外 According to the outdoor ambient temperature T 外 Control the outdoor fan (10) of the outdoor unit of the air conditioner to run at a preset speed or normal speed; The second detection module is installed on the main board (30) of the controller of the indoor unit of the air conditioner to detect the indoor ambient temperature T. 内 The module temperature T of the controller main board (30) of the indoor unit of the air conditioner. 模块 According to the indoor ambient temperature T 内 and the module temperature T 模块 Control the rotational speed of the external fan (10); The third detection module is installed on the outdoor heat exchanger (40) of the outdoor unit of the air conditioner to detect the outer tube temperature T of the heat exchange tube of the outdoor heat exchanger (40). 外管 According to the outer tube temperature T 外管 Control the rotational speed of the external fan (10).

15. A non-volatile storage medium, characterized in that, The non-volatile storage medium includes a stored program, wherein the program executes the air conditioning control method according to any one of claims 1 to 13.

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