Air conditioning system external fan control method, device, electronic device and storage medium

Abstract

The present application discloses a method, device, electronic device and storage medium for controlling an outdoor fan of an air-conditioning system, wherein the method comprises: confirming a target pressure value based on a first pressure value, a current outdoor fan speed and a current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outdoor fan to operate at the current outdoor fan speed; controlling the outdoor fan to operate at a target speed based on the target pressure value, and adjusting the speed of the compressor according to different outdoor temperatures, so that the air-conditioning system operates at a matching operating pressure, thereby reducing the energy consumption of the air-conditioning system.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a method, device, electronic equipment and storage medium for controlling an external fan of an air conditioning system. Background Art

[0002] With the proposal and promotion of a series of information projects such as "Internet+" and "big data application", the scale and number of data centers have developed rapidly and become a major electricity consumer in the information society. Data centers have provided great convenience for the development of modern society, but at the same time, their power consumption remains high.

[0003] In actual applications, variable frequency machine room air conditioners have different use environments, and their working effects are affected by environmental factors. In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: when the variable frequency machine room air conditioner works under high temperature conditions, low temperature conditions, etc., since the machine room air conditioner mainly uses a compressor with a fixed compression ratio, when the outdoor ambient temperature is high or low, the compressor with a fixed compression ratio does not match the working pressure required by the outside world, which will lead to high energy consumption of the compressor, and then the energy consumption of the entire air conditioning system will also increase accordingly. The energy consumption of the air conditioning system is mainly determined by the external fan and the compressor. Although there are also solutions in the prior art that adjust the compression ratio of the compressor by adjusting the speed of the external fan to achieve low energy consumption heat dissipation in the machine room, these existing external fan control logics still cannot effectively reduce the energy consumption of the air conditioning system.

[0004] Therefore, a new external fan control logic is urgently needed to reduce the energy consumption of the air-conditioning system. Summary of the invention

[0005] The present application provides a method, device, electronic device and storage medium for controlling an external fan of an air-conditioning system, which adopts a new external fan control logic and can reduce the energy consumption of the air-conditioning system.

[0006] In a first aspect, a method for controlling an external fan of an air conditioning system is provided, comprising:

[0007] Determine a target pressure value according to a first pressure value, a current external fan speed and a current outdoor temperature, wherein the first pressure value is a pressure value for controlling the external fan to operate at the current external fan speed;

[0008] The external fan is controlled to run at a target speed according to the target pressure value.

[0009] Optionally, determining the target pressure value according to the first pressure value, the current external fan speed and the current outdoor temperature includes:

[0010] When the current outdoor temperature is within a preset temperature range and the current external fan speed is greater than a preset speed, the target pressure value is confirmed based on the first pressure value, and the target pressure value is greater than the first pressure value.

[0011] Optionally, confirming the target pressure value based on the first pressure value includes:

[0012] The sum of the first pressure value and the second set threshold is calculated to obtain the target pressure value.

[0013] Optionally, determining the target pressure value according to the first pressure value, the current external fan speed and the current outdoor temperature includes:

[0014] When the current outdoor temperature is less than a preset temperature threshold, a preset pressure value is acquired as the target pressure value.

[0015] Optionally, before confirming the target pressure value according to the first pressure value, the current external fan speed and the current outdoor temperature, the method further includes:

[0016] The first pressure value is confirmed according to the current evaporation pressure and the first set threshold value, and the external fan is controlled to operate at a first speed according to the first pressure value.

[0017] Optionally, confirming the first pressure value according to the current evaporation pressure and a first set threshold value includes:

[0018] The sum of the current evaporation pressure and the first set threshold is calculated to obtain the first pressure value.

[0019] Optionally, the current evaporation pressure is determined according to the indoor return air temperature, or is obtained according to detection by a pressure sensor.

[0020] In a second aspect, a control device for an external fan of an air conditioning system is provided, comprising:

[0021] A calculation module, configured to determine a target pressure value according to a first pressure value, a current external fan speed, and a current outdoor temperature, wherein the first pressure value is a pressure value for controlling the external fan to operate at the current external fan speed;

[0022] The control module is used to control the external fan to run at a target speed according to the target pressure value.

[0023] Optionally, the calculation module is specifically used to: when the current outdoor temperature is within a preset temperature range and the current outdoor fan speed is greater than a preset speed, confirm the target pressure value based on the first pressure value, and the target pressure value is greater than the first pressure value.

[0024] Optionally, the calculation module is specifically used to calculate the sum of the first pressure value and a second set threshold value to obtain the target pressure value.

[0025] Optionally, the calculation module is further specifically used to: when the current outdoor temperature is less than a preset temperature threshold, obtain a preset pressure value as the target pressure value.

[0026] Optionally, the calculation module is also used to: before confirming the target pressure value based on the first pressure value, the current outdoor fan speed and the current outdoor temperature, confirm the first pressure value based on the current evaporating pressure and a first set threshold, and control the outdoor fan to operate at a first speed based on the first pressure value.

[0027] Optionally, the calculation module is further specifically used to: calculate the sum of the current evaporation pressure and the first set threshold value to obtain the first pressure value.

[0028] Optionally, the current evaporation pressure is determined according to the indoor return air temperature, or is obtained according to detection by a pressure sensor.

[0029] According to a third aspect, an electronic device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the first aspect and any possible implementation thereof.

[0030] In a fourth aspect, a computer storage medium is provided, wherein the computer storage medium stores one or more instructions, wherein the one or more instructions are suitable for being loaded by a processor and executing the steps of the above-mentioned first aspect and any possible implementation thereof.

[0031] The air-conditioning system outdoor fan control method in the present application includes at least the following beneficial effects: confirming a target pressure value based on a first pressure value, a current outdoor fan speed and a current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outdoor fan to operate at the current outdoor fan speed; controlling the outdoor fan to operate at a target speed according to the target pressure value; when the air-conditioning system operates in a high temperature condition or a low temperature condition, the speed of the outdoor fan is controlled by controlling the target pressure, and the speed of the outdoor fan affects the condensing temperature, thereby affecting the speed of the compressor; the speed of the compressor is changed by changing the speed of the outdoor fan, so that the energy consumption of the compressor changes with the change of the speed of the compressor; the control logic can further reasonably regulate the speed of the outdoor fan according to the current outdoor fan speed and the outdoor temperature, so that the speed of the compressor can be adjusted according to different outdoor temperatures, so that the air-conditioning system operates at a matching operating pressure, thereby reducing the energy consumption of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0033] Figure 1 A flow chart of a method for controlling an external fan of an air-conditioning system provided in an embodiment of the present application;

[0034] Figure 2 A schematic flow chart of another method for controlling an external fan of an air-conditioning system provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the structure of a variable frequency computer room air conditioning system provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of the structure of an external fan control device for an air-conditioning system provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of the structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0040] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0042] See also Figure 1 , Figure 1 A flow chart of a method for controlling an external fan of an air conditioning system provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the method includes:

[0043] 101. Determine a target pressure value according to a first pressure value, a current external fan speed, and a current outdoor temperature, wherein the first pressure value is a pressure value for controlling the external fan to operate at the current external fan speed;

[0044] 102. According to the above target pressure value, the external fan is controlled to run at a target speed.

[0045] The air conditioning system external fan control method in the embodiment of the present application can be applied to the air conditioning system, specifically a variable frequency machine room air conditioning system. The variable frequency machine room air conditioning system may include common components such as a compressor, a flow device, an external fan, etc., and the embodiment of the present application does not limit this. Among them, the system's software control process can be processed based on the control unit.

[0046] Among them, the first pressure value is the current pressure value corresponding to the current external fan speed. For example, controlling the current external fan speed according to the first pressure value is recorded as the first speed. This process can be recorded as the first control stage.

[0047] In the embodiment of the present application, the speed of the external fan can be further controlled based on the current control parameters of the external fan: the first pressure value and the current speed of the external fan, that is, the second control stage.

[0048] Specifically, an outdoor temperature sensor can be set in the air-conditioning system to collect the outdoor temperature. On the basis of controlling the current outdoor fan speed based on the first pressure value, the current outdoor fan speed and the current outdoor temperature can be judged to confirm whether to further adjust the current outdoor fan speed. The adjustment is mainly to change the current outdoor fan speed by adjusting the first pressure value, that is, the new target pressure value can be confirmed to control the outdoor fan to run at the target speed. When the air-conditioning system is operating in a high temperature condition or a low temperature condition, the speed of the outdoor fan is controlled by controlling the target pressure, and the speed of the outdoor fan will affect the condensing temperature, and then affect the speed of the compressor. The speed of the compressor is changed by changing the speed of the outdoor fan, so that the energy consumption of the compressor changes with the change of the compressor speed. The control logic can further reasonably regulate the speed of the outdoor fan according to the current outdoor fan speed and the outdoor temperature, so that the speed of the compressor can be adjusted according to different outdoor temperatures, so that the air-conditioning system can operate at a matching operating pressure, thereby reducing the energy consumption of the air-conditioning system.

[0049] In an optional implementation, step 101 includes:

[0050] When the current outdoor temperature is within a preset temperature range and the current external fan speed is greater than a preset speed, the target pressure value is confirmed based on the first pressure value, and the target pressure value is greater than the first pressure value.

[0051] Specifically, when it is detected that the current outdoor temperature T is within the preset temperature range (such as satisfying T1≤T≤T2), and the current outdoor fan speed is greater than the preset speed (AA% speed), a control logic different from the aforementioned first control stage can be adopted, that is, calculating the target pressure value to control the outdoor fan to operate at the corresponding target speed through the target pressure value.

[0052] The target pressure value may be obtained on the basis of the first pressure value. The specific calculation method of the target pressure value may be set as required, such as setting a parameter value set for calculating the target pressure value (which may be a second set threshold value). Optionally, a specific value may be added to the first pressure value, or the first pressure value may be adjusted by a weight parameter to obtain a relatively larger target pressure value, etc., which is not limited in the embodiments of the present application.

[0053] In an optional implementation, the determining the second pressure value based on the first pressure value includes:

[0054] The sum of the first pressure value and the second set threshold is calculated to obtain the target pressure value.

[0055] Specifically, the sum of the first pressure value and the second set threshold value may be calculated as the target pressure value. Assuming the first pressure value is Pc1 and the second set threshold value is N, the target pressure value is (Pc1+N).

[0056] Among them, the above T1 and T2 can be adjusted according to the specific model, and the above preset speed and the second set threshold N are also adjusted and set according to the specific external fan. The above second set threshold is a parameter value set for calculating the target pressure value, which can be set as needed, and can be determined based on the compression ratio, pressure difference and system pressure difference requirements of the compressor, and the embodiment of the present application does not limit this.

[0057] Since the power of the external fan is proportional to the cube of the speed of the external fan, when the speed of the external fan is higher than a certain speed, the increase in air volume is less than the increase in power. Although increasing the speed of the external fan can reduce the speed of the compressor, the reduction is not as large as the increase in the power of the external fan. Therefore, in this case, in the embodiment of the present application, through the above steps, a higher external fan pressure setting value is adopted to control the external fan, so that the speed of the external fan is reduced by a greater margin, so that the heat dissipation capacity of the condenser is reduced, and the reduction in the heat dissipation capacity of the condenser will lead to an increase in the condensation temperature, and the increase in the condensation temperature will lead to a reduction in the speed of the compressor. Since the speed of the compressor is proportional to the power of the compressor, after the speed of the compressor is reduced, the power of the compressor will also be reduced, thereby achieving overall energy saving. Specifically, the variable frequency room air conditioning system in the embodiment of the present application can adopt different logics in different temperature zones. When T1≤T≤T2, the target pressure value used for external fan control can be further increased to control the speed and power of the external fan to reduce, thereby achieving overall energy saving.

[0058] In an optional implementation, step 101 further includes:

[0059] When the current outdoor temperature is lower than the preset temperature threshold, a preset pressure value is obtained as the target pressure value.

[0060] Specifically, the preset temperature threshold T0 can be set as needed, for example, T0 is -15 to -20°C. When it is detected that the current outdoor temperature T is lower than T0, the current external fan speed can be directly set to a fixed speed, that is, the preset pressure value X is obtained, and the external fan is controlled to run at the fixed speed according to the preset pressure value X.

[0061] The preset pressure value X can be determined according to the specific situation. In an optional embodiment, the preset pressure value X can be a set value between 15 and 20 bar. Under low outdoor temperature conditions, when the external fan is already in the on / off state, the current evaporation pressure is unstable. Therefore, the external fan speed can be directly set instead of controlling the external fan speed according to the current evaporation pressure, thereby achieving stable control of the system.

[0062] In an optional implementation, before the above step 101, the method further includes:

[0063] 01. According to the current evaporation pressure and the first set threshold value, the first pressure value is confirmed, and the external fan is controlled to operate at a first speed according to the first pressure value.

[0064] The above step 01 is a control logic of the first control stage. The above first set threshold is a parameter value set for calculating the first pressure value, which can be set as needed, and can be determined based on the compression ratio, pressure difference and system pressure difference requirements of the compressor, and the embodiment of the present application does not limit this.

[0065] Optionally, the above step 01 includes:

[0066] The sum of the current evaporation pressure and the first set threshold is calculated to obtain the first pressure value.

[0067] Specifically, the sum of the current evaporation pressure Pe and the first set threshold value A can be calculated to obtain the first pressure value Pc, so that the speed of the external fan is controlled using the first pressure value Pc, and the speed of the external fan corresponding to the first pressure value Pc is the first speed. That is, it can be understood as: setting Pc = Pe + A value, thereby controlling the external fan to run at the first speed corresponding to Pc.

[0068] After executing step 01, the speed control of the outdoor fan of the air-conditioning system is performed according to Pc=Pe+A; then steps 101 and 102 can be executed, that is, the target pressure value can be further confirmed based on the current outdoor fan speed and the current outdoor temperature, and the outdoor fan is controlled to operate at the target speed according to the target pressure value, which will not be repeated here.

[0069] Optionally, there are two ways to obtain the current evaporation pressure in the embodiment of the present application:

[0070] The current evaporation pressure is determined according to the indoor return air temperature, or the current evaporation pressure is detected by a pressure sensor.

[0071] When the air conditioning system is started, the evaporation pressure will change dynamically until the air conditioning system runs stably and the evaporation pressure is fixed. Then, the current evaporation pressure can be determined by the current indoor return air temperature. Specifically, a temperature sensor can be set in the air conditioning system to detect the indoor return air temperature. In the embodiment of the present application, different evaporation pressures Pe can be set according to the indoor return air temperature, that is, the correspondence between the indoor return air temperature and the current evaporation pressure. After determining the current indoor return air temperature, the corresponding current evaporation pressure Pe can be determined.

[0072] Optionally, when the operating conditions of the air-conditioning system change, there will be errors in the determination of the indoor return air temperature, and the inlet pressure (inlet pressure) of the compressor is approximately equal to the evaporation pressure. Therefore, a pressure sensor set at the compressor inlet can be selected to measure the current evaporation pressure Pe in real time.

[0073] In an optional embodiment, the method further includes:

[0074] After the external fan runs at the first speed for a predetermined period of time, obtaining the real-time evaporation pressure;

[0075] The first pressure value is confirmed according to the real-time evaporation pressure and the first set threshold value, and the external fan is controlled to run at a first speed according to the first pressure value.

[0076] Specifically, in the embodiment of the present application, the external fan control logic of step 01, or step 101 and step 102 can be periodically executed to achieve real-time regulation of the external fan speed.

[0077] In the first control stage, the judgment of the current external fan speed and the current outdoor temperature can also be performed periodically. When it is detected that the current outdoor temperature is within the preset temperature range and the current external fan speed is greater than the preset speed, the first control logic of the second control stage is entered: the target pressure value is further confirmed by the above method to adjust the external fan speed; when the current outdoor temperature is less than the preset temperature threshold, the second control logic of the second control stage is entered: the preset pressure value is directly obtained as the target pressure value to adjust the external fan speed; and when it is detected that it is not the above two situations, the control logic of the first control stage can continue to be executed, such as step 01: according to the current evaporation pressure and the first set threshold, the first pressure value is confirmed, and the external fan is controlled to run at the first speed according to the first pressure value.

[0078] In the embodiment of the present application, sensors in the system may be adjusted or increased as needed to achieve the required data collection and monitoring, so as to provide the data to the system or control unit for reasonable control, but the embodiment of the present application does not impose any restrictions on this.

[0079] Figure 2 A flow chart of another method for controlling an external fan of an air conditioning system provided in an embodiment of the present application. Figure 2 As shown, in a specific implementation, the method for controlling an external fan of an air-conditioning system in an embodiment of the present application may include:

[0080] After the air conditioning system is turned on for a preset time t, it enters the air pump mode and executes the external fan control logic of the first control stage in the embodiment of the present application;

[0081] Detect the current evaporation pressure Pe, and the outdoor fan can be controlled according to the current evaporation pressure Pe and the first set threshold value A, that is, set the first pressure value Pc = (Pe + A), so as to control the outdoor fan to run at the first speed corresponding to Pc;

[0082] After the external fan is controlled according to Pc = (Pe + A), monitor the current external fan speed and the current outdoor temperature; when the current outdoor temperature T is within the preset temperature range (such as satisfying T1 ≤ T ≤ T2), and the current external fan speed is greater than or equal to the preset speed (AA% speed), execute an external fan control logic in the second control stage of the embodiment of the present application: calculate the target pressure value (Pc + N), so as to control the external fan to operate at the target speed corresponding to (Pc + N), and the speed of the external fan can be controlled <BB% speed; where the AA% speed can be 80%, when the external fan speed is greater than 80%, the increase amplitude of the external fan speed controlled by the first pressure value is lower than that when the external fan speed is less than 80%. For example, when the external fan speed is greater than 80%, the speed of the external fan is Y revolutions, at this time the condenser value decreases by 1 bar, and then the decrease amplitude of the compressor speed is also very small, while controlling the external wind speed below 80% makes the condenser value decrease more, and the decrease amplitude of the compressor is also greater, thereby achieving overall energy saving.

[0083] When the current outdoor temperature T < the preset temperature threshold T0, execute another external fan control logic in the second control stage of the embodiment of the present application: directly set the preset pressure value X to control the external fan speed to operate at the speed corresponding to the preset pressure value X. Since the device selection of the condenser is determined, the main factor affecting the heat dissipation capacity of the condenser is the speed of the external fan. When the speed of the external fan is constant, the heat dissipation capacity of the condenser is also stable, the condensation temperature is also stable, and the pressure of the system is therefore stable. Therefore, when the outdoor temperature T < the preset temperature threshold T0, by directly setting the preset pressure value X, the whole machine can operate stably.

[0084] In the embodiment of the present application, different logics are adopted in different temperature zones. When T1 ≤ T ≤ T2, the overall energy saving of the whole machine is achieved through verification, and when T < T0, a value is directly set to achieve the stable operation of the unit.

[0085] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a variable-frequency computer room air-conditioning system provided by the embodiment of the present application. As Figure 3 shown, the variable-frequency computer room air-conditioning system includes:

[0086] A compressor 1, a condenser 2, a flow regulating device 3, and an evaporator 4. The control unit is not marked here. Based on this system structure and the control unit, the control of the external fan speed can be realized.

[0087] The exhaust port of the compressor 1 is communicated with the inlet of the condenser 2, the outlet of the condenser 2 is communicated with the inlet of the flow regulating device 3, the outlet of the flow regulating device 3 is communicated with the inlet of the evaporator 4, and the outlet of the evaporator 4 is communicated with the suction port of the compressor 1.

[0088] Optionally, a pressure sensor can be set at the compressor suction port in the variable frequency room air conditioning system. When the working condition of the air conditioning system changes, there will be errors in the determination of the indoor return air temperature, and the inlet pressure (suction port pressure) of the compressor is similar to the evaporation pressure. Therefore, the pressure sensor set at the compressor suction port can be selected to measure the current evaporation pressure Pe in real time.

[0089] Optionally, the variable frequency computer room air conditioning system in the embodiment of the present application may also be configured with components such as an oil separator, a drying filter, a sight glass, and a gas-liquid separator according to actual conditions, which is not limited here.

[0090] The variable frequency machine room air conditioning system in the embodiment of the present application is combined with Figure 1 The control logic in the illustrated embodiment further reasonably regulates the external fan speed by monitoring the current external fan speed and outdoor temperature, so that the external fan speed is more suitable for different outdoor temperatures, and the air-conditioning system operates at a matching operating pressure, thereby reducing the energy consumption of the air-conditioning system.

[0091] For example, when the air conditioner is turned on, it generally takes a period of time t to start up, and time t is generally 3 minutes. During the startup time, the speed of the outdoor fan can be adjusted according to the set value. When the system is started up and the compressor reaches the rated speed, the outdoor fan control logic of the first control stage can be executed. For example: based on the current evaporation pressure and the first set threshold, the first pressure value is confirmed, and the outdoor fan is controlled to run at a first speed according to the first pressure value; assuming that specifically: the current indoor return air temperature is detected, such as 24±2℃, if the evaporation pressure Pe is 9bar, the A value can be 3, then Pc1=Pe1+A=9bar+3bar=12bar is calculated, and the speed of the external fan is controlled by Pc1=12bar. The pressure setting value of the external fan of a conventional variable frequency air conditioner is generally 18 to 21 bar, so the speed of the external fan is relatively low; the evaporation pressure is generally 8.5-12.5 bar, and in the embodiment of the present application, the above-mentioned calculation logic and the setting of a smaller first setting threshold value A are used to determine a target pressure value relatively lower than the conventional setting value to control the speed of the external fan, so the speed of the external fan is increased, and the increase in the speed of the external fan reduces the condensing pressure, and the condensing pressure is positively correlated with the condensing temperature, so the condensing temperature is reduced, the pressure of the air conditioning system is reduced, and thus the speed of the compressor is reduced; because the compressor power usually accounts for 60 to 70% of an air conditioning system, and the external fan power accounts for 10 to 25%, the energy efficiency of the whole machine will be greatly improved after the compressor speed is reduced, thereby achieving the purpose of energy saving;

[0092] In a certain temperature range, when T1≤T≤T2 is satisfied, generally between 5℃ and 20℃, the power of the external fan speed will increase and be higher than the power of the compressor speed reduction. This is because the power of the external fan is proportional to the cube of the speed. An external fan control logic of the second control stage can be executed: in this temperature range and the current external fan speed satisfies>AA% speed, for example, AA% is 80%, the external fan speed set point is adjusted to (Pc+N), relative to Figure 1 In terms of the control logic of the embodiment shown, the pressure setting value for controlling the speed of the external fan is appropriately increased by the second set threshold value N (it can be understood that the former increase value is A, and the latter increase value is A+N). In this case, a relatively high external fan pressure setting value can be adopted to control the external fan, and then the speed and power of the external fan are appropriately reduced to achieve overall energy saving;

[0093] When the outdoor temperature is lower than T0, another external fan control logic of the second control stage can be executed. For example, T0 is generally -15 to -20°C, and the target pressure value is directly set to X. The X value can be determined according to the specific situation, such as a set value between 15 and 20 bar. The external fan is controlled to run at the corresponding speed according to the preset pressure value X. When the outdoor temperature is particularly low, the external fan is already in the on / off state, and the current evaporation pressure is unstable. Directly setting the external fan speed value can achieve stable control of the system, thereby avoiding changes in the calculated target pressure value due to changes in the evaporation pressure, which in turn affects the operation of the external fan.

[0094] The above embodiments are for illustration only. In practical applications, the corresponding setting values ​​can be adjusted as needed, and the embodiments of the present application are not limited to this.

[0095] Based on the description of the above variable frequency air conditioning control method embodiment, the present application embodiment also discloses an air conditioning system external fan control device. Figure 3 As shown, the air conditioning system external fan control device 400 includes:

[0096] A calculation module 410 is used to determine a target pressure value according to a first pressure value, a current external fan speed and a current outdoor temperature, wherein the first pressure value is a pressure value for controlling the external fan to operate at the current external fan speed;

[0097] The control module 420 is used to control the external fan to run at a target speed according to the above target pressure value.

[0098] Optionally, the calculation module 410 is specifically used for:

[0099] When the current outdoor temperature is within a preset temperature range and the current external fan speed is greater than a preset speed, the target pressure value is confirmed based on the first pressure value, and the target pressure value is greater than the first pressure value.

[0100] Optionally, the calculation module 410 is specifically configured to calculate the sum of the first pressure value and the second set threshold value to obtain the target pressure value.

[0101] Optionally, the calculation module 410 is specifically used for:

[0102] When the current outdoor temperature is lower than the preset temperature threshold, a preset pressure value is obtained as the target pressure value.

[0103] Optionally, the calculation module 410 is further configured to confirm the first pressure value according to the current evaporation pressure and the first set threshold value;

[0104] The control module 420 is further configured to control the external fan to operate at a first speed according to the first pressure value.

[0105] Optionally, the calculation module 410 is further configured to calculate the sum of the current evaporation pressure and the first set threshold value to obtain the first pressure value.

[0106] Optionally, the current evaporation pressure is determined according to the indoor return air temperature, or is obtained according to detection by a pressure sensor.

[0107] According to an embodiment of the present application, the above-mentioned air conditioning system external fan control device 400 can perform the above-mentioned Figure 1 or Figure 2 The steps in the method embodiment shown are not repeated here.

[0108] Based on the description of the above method embodiment and device embodiment, the present application embodiment further provides an electronic device, which may be an electronic device of an air conditioning system, such as a variable frequency air conditioner. Figure 5 The electronic device 500 provided by the present application is a schematic diagram of the structure of an electronic device, the electronic device 500 may include a processor 501, an input / output device 502, a memory 503 and a computer storage medium. Among them, the various component units in the electronic device may be connected via a bus 504 or other means.

[0109] The computer storage medium can be stored in the memory 503 of the electronic device 500. The computer storage medium is used to store a computer program. The computer program includes program instructions. The processor 601 is used to execute the program instructions stored in the computer storage medium. The processor (or CPU (Central Processing Unit)) is the computing core and control core of the electronic device. It is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions to implement the corresponding method flow or corresponding function. In one embodiment, the processor 501 of the embodiment of the present application can be used to perform a series of processing, including such as Figure 1 or Figure 2 The various steps involved in the method shown, etc.

[0110] The embodiment of the present application also provides a computer storage medium (Memory), which is a memory device in an electronic device for storing programs and data. It is understandable that the computer storage medium here can include both built-in storage media in electronic devices and, of course, extended storage media supported by electronic devices. The computer storage medium provides a storage space that stores the operating system of the electronic device. In addition, one or more instructions suitable for being loaded and executed by a processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer storage medium here can be a high-speed RAM memory, or a non-volatile memory, such as at least one disk storage; optionally, it can also be at least one computer storage medium located away from the aforementioned processor.

[0111] In one embodiment, one or more instructions stored in a computer storage medium may be loaded and executed by a processor to implement the corresponding steps in the above embodiment; in a specific implementation, one or more instructions in a computer storage medium may be loaded and executed by a processor as follows: Figure 1 or Figure 2 The various steps involved in the method shown will not be repeated here.

[0112] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0113] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the division of the module is only a logical function division, and there may be other division methods in actual implementation, for example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. The mutual coupling, direct coupling, or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0114] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0115] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations. The available medium may be a read-only memory (ROM), or a random access memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a tape, a magnetic disk, or an optical medium, such as a digital versatile disc (DVD), or a semiconductor medium, such as a solid state disk (SSD), etc.

Claims

1. A method for controlling an external fan of an air conditioning system, characterized in that: include: Determine a target pressure value according to a first pressure value, a current external fan speed and a current outdoor temperature, wherein the first pressure value is a pressure value for controlling the external fan to operate at the current external fan speed; Controlling the external fan to run at a target speed according to the target pressure value; The method of confirming the target pressure value based on the first pressure value, the current external fan speed and the current outdoor temperature includes: when the current outdoor temperature is within the preset temperature range T1-T2 and the current external fan speed is greater than the preset speed, confirming the target pressure value based on the first pressure value, and the target pressure value is greater than the first pressure value; the preset speed is 80% of the speed; confirming the target pressure value based on the first pressure value includes: calculating the sum of the first pressure value and a second set threshold value to obtain the target pressure value; the second set threshold value is set based on the compression ratio, pressure difference and system pressure difference requirement of the compressor, and is a parameter value for calculating the target pressure value; The method of confirming the target pressure value based on the first pressure value, the current external fan speed and the current outdoor temperature also includes: when the current outdoor temperature is less than a preset temperature threshold T0, obtaining a preset pressure value as the target pressure value.

2. The method for controlling an external fan of an air conditioning system according to claim 1, characterized in that: Before confirming the target pressure value according to the first pressure value, the current external fan speed and the current outdoor temperature, the method further includes: Based on the current evaporating pressure and a first set threshold, the first pressure value is confirmed, and the external fan is controlled to operate at a first speed according to the first pressure value; the first set threshold is set based on the compression ratio, pressure difference and system pressure difference requirements of the compressor, in order to calculate the parameter value of the first pressure value.

3. The method for controlling an external fan of an air conditioning system according to claim 2, characterized in that: The step of confirming the first pressure value according to the current evaporation pressure and the first set threshold value includes: The sum of the current evaporation pressure and the first set threshold is calculated to obtain the first pressure value.

4. The method according to claim 3, characterized in that: The current evaporation pressure is determined according to the indoor return air temperature, or is obtained by detection by a pressure sensor.

5. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method for controlling an outdoor fan of an air-conditioning system as claimed in any one of claims 1 to 4.

6. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the processor executes the steps of the method for controlling an outdoor fan of an air-conditioning system according to any one of claims 1 to 4.

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