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 external fan of an air-conditioning system, wherein the method comprises: calculating a pressure difference according to an outlet pressure of a compressor and an inlet pressure of a flow regulating device; confirming a target pressure value according to a current evaporating pressure, the pressure difference and a first set threshold, and controlling the rotation speed of the external fan according to the target pressure value, and energy-saving operation of the air-conditioning system can be achieved by controlling the external fan.

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 use, computer room air conditioners often have long pipes and high drop conditions. Under such conditions, the pipeline pressure loss of the computer room air conditioning system will be very large. At the same time, the power consumption of the compressor will also increase with the increase of the pipe length. This will cause the overall power consumption of the computer room air conditioner to increase significantly, which is not energy-efficient enough.

[0004] The power consumption of the air-conditioning system is mainly determined by the external fan and the compressor. In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art: the existing control logic for achieving energy saving by controlling the external fan cannot effectively reduce the overall power consumption.

[0005] Therefore, a new external fan control logic is urgently needed to reduce the power consumption of the air-conditioning system. Summary of the invention

[0006] The present application provides a method, device, electronic device and storage medium for controlling an external fan of an air-conditioning system, which can provide a new control logic for the external fan, thereby reducing the power consumption of the air-conditioning system.

[0007] In a first aspect, a method for controlling an external fan of an air conditioning system is provided, comprising:

[0008] Calculate the pressure difference based on the outlet pressure of the compressor and the inlet pressure of the flow regulating device;

[0009] The target pressure value is determined according to the current evaporation pressure, the pressure difference value and the first set threshold value, and the rotation speed of the external fan is controlled according to the target pressure value.

[0010] Optionally, determining the target pressure value according to the current evaporation pressure, the pressure difference and the first set threshold value includes:

[0011] Calculating the sum of the pressure difference, the current evaporation pressure, and the first set threshold to obtain the first target pressure value;

[0012] The external fan is controlled to operate at a first target speed according to the first target pressure value.

[0013] Optionally, the method further includes:

[0014] After the system is started and runs for a preset time and the compressor reaches a rated speed, the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulating device and the first set threshold are obtained.

[0015] Optionally, the method further includes:

[0016] Get the outdoor temperature;

[0017] When the outdoor temperature is within a preset temperature range and the rotation speed of the outdoor fan is greater than a preset rotation speed, determining a second target pressure value based on the first target pressure value;

[0018] The external fan is controlled to operate at a second target speed according to the second target pressure value.

[0019] Optionally, confirming the second target pressure value based on the first target pressure value includes:

[0020] The sum of the first target pressure value and the second set threshold is calculated to obtain the second target pressure value.

[0021] Optionally, the method further includes:

[0022] After the outdoor fan runs at the first target speed for a predetermined period of time, obtaining a real-time evaporation pressure and a pressure difference;

[0023] The first target pressure value is determined according to the real-time evaporation pressure and pressure difference, and the first set threshold.

[0024] Optionally, obtaining the current evaporation pressure includes:

[0025] Determine the current evaporation pressure according to the indoor return air temperature, or detect the current evaporation pressure according to a pressure sensor;

[0026] The acquiring the first set threshold comprises: determining the first set threshold based on a compression ratio and a pressure difference of the compressor and a system pressure difference requirement.

[0027] In a second aspect, a control device for an external fan of an air conditioning system is provided, comprising:

[0028] A calculation module, used for calculating a pressure difference according to an outlet pressure of the compressor and an inlet pressure of the flow regulating device;

[0029] The control module is used to confirm the target pressure value according to the current evaporation pressure, the pressure difference value and the first set threshold value, and control the rotation speed of the external fan according to the target pressure value.

[0030] 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.

[0031] 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.

[0032] The air-conditioning system external fan control method in the present application calculates the pressure difference according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device; confirms the target pressure value according to the current evaporation pressure, the pressure difference and the first set threshold value, and controls the rotation speed of the external fan according to the target pressure value; the target pressure value obtained by this scheme is relatively lower than the set value of the conventional variable frequency air conditioner, and the rotation speed of the external fan can be controlled to increase, and the increase in the rotation speed of the external fan will reduce the rotation speed of the compressor, which can improve the energy efficiency of the whole machine and achieve the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] 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;

[0035] 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;

[0036] 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;

[0037] Figure 4 A schematic diagram of the structure of a long-pipe variable-frequency machine room air conditioning system provided in an embodiment of the present application;

[0038] Figure 5 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;

[0039] Figure 6 A schematic diagram of the structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0040] 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 described clearly and completely 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 the field without creative work are within the scope of protection of the present application.

[0041] 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.

[0042] 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.

[0043] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0044] 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:

[0045] 101. Calculate the pressure difference based on the outlet pressure of the compressor and the inlet pressure of the flow regulating device.

[0046] 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 regulating device, and an external fan, which are not limited in the embodiment of the present application. Among them, the software control process of the system can be processed based on the control unit.

[0047] Specifically, sensors can be set at corresponding positions to collect the inlet pressure (intake port pressure) Pb of the flow regulating device and the outlet pressure (exhaust port pressure) Pa of the compressor, and the difference between the outlet pressure Pa of the compressor and the inlet pressure Pb of the flow regulating device can be calculated to obtain the pressure difference (Pa-Pb).

[0048] 102. According to the current evaporation pressure, the pressure difference and the first set threshold, a target pressure value is determined, and the rotation speed of the external fan is controlled according to the target pressure value.

[0049] In the embodiment of the present application, the current evaporation pressure of the air-conditioning system and the first set threshold value can also be obtained, and then the target pressure value is determined according to the pressure difference, the current evaporation pressure and the first set threshold value, and the speed of the external fan of the air-conditioning system is controlled by the target pressure value. Among them, the first set threshold value is a parameter value set for calculating the target pressure value, which can be set as needed, and the embodiment of the present application does not limit this.

[0050] In an optional implementation, the above step 102 includes:

[0051] Calculating the sum of the pressure difference, the current evaporation pressure and the first set threshold to obtain a first target pressure value;

[0052] The above-mentioned external fan is controlled to run at a first target speed by the above-mentioned first target pressure value.

[0053] Specifically, the sum of the current evaporation pressure Pe, the pressure difference (Pa-Pb) and the first set threshold value A can be calculated to obtain the first target pressure value Pc, so that the speed of the external fan can be controlled by the first target pressure value Pc, and the speed of the external fan corresponding to the first target pressure value Pc is the first target speed. That is, it can be understood as: setting Pc = Pe + (Pa-Pb) + A value, thereby controlling the external fan to run at the first target speed corresponding to Pc.

[0054] In an optional implementation manner, the above-mentioned obtaining of the current evaporation pressure includes:

[0055] Determine the current evaporation pressure according to the indoor return air temperature, or detect the current evaporation pressure according to a pressure sensor;

[0056] The obtaining of the first set threshold comprises: determining the first set threshold based on the compression ratio and pressure difference of the compressor and the system pressure difference requirement.

[0057] 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.

[0058] 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.

[0059] Among them, the above-mentioned first set threshold is a parameter value set for calculating the target pressure value, which can be set in advance as needed, and can be specifically determined based on the compression ratio, pressure difference and system pressure difference requirements of the compressor.

[0060] In an optional implementation, the above method further includes:

[0061] After the system is started and runs for a preset period of time and the compressor reaches the rated speed, the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulating device and the first set threshold are obtained.

[0062] Specifically, when the air conditioner is turned on, it generally takes a period of time t to start up, and the time t is generally 3 minutes. During the startup time, the speed of the outdoor fan is regulated according to the set value X; when the system is turned on, the running time reaches the preset time (here the preset time is t), and the speed of the compressor reaches the rated speed, then the above steps 101 and 102 can be executed to implement the control logic of the outdoor fan, which will not be repeated here. The above preset time and rated speed can be set as needed.

[0063] Optionally, the above method further includes:

[0064] After the external fan runs at the first target speed for a predetermined period of time, obtaining the real-time evaporation pressure and pressure difference;

[0065] The first target pressure value is determined according to the real-time evaporation pressure and pressure difference, and the first set threshold.

[0066] Specifically, in the embodiment of the present application, the external fan control logic of step 101 and step 102 can be periodically executed. Through the above steps 101 and 102, after the external fan is controlled to run at the first target speed (set to w1) according to the confirmed first target pressure value (set to P1), the real-time outlet pressure of the compressor, the inlet pressure of the flow regulating device and the current evaporation pressure can be obtained again after a predetermined time period to update the first target pressure value (set to P2), and the external fan speed corresponding to P2 is w2, that is, the external fan is controlled to run at the new target speed w2 through the new target pressure value P2, so as to realize real-time regulation of the external fan speed.

[0067] In one implementation, the value range of the first set threshold value A in the embodiment of the present application is 1 to 3 bar.

[0068] The pressure setting value used by conventional variable frequency air conditioners to control the speed of the external fan is generally 18 to 21 bar, so the speed of the external fan is relatively low. In the embodiment of the present application, the above-mentioned calculation logic and the setting of a smaller first setting threshold A are used to determine a target pressure value relatively lower than the conventional setting value to control the speed of the external fan. Therefore, the speed of the external fan is increased and the speed of the compressor is reduced, thereby greatly improving the energy efficiency of the entire machine and achieving the purpose of energy saving.

[0069] See also Figure 2 , 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 is shown as follows: Figure 2 As shown, the method includes:

[0070] 201. Calculate the pressure difference according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device;

[0071] 202. Calculate the sum of the pressure difference, the current evaporation pressure and the first set threshold to obtain a first target pressure value;

[0072] 203. Get outdoor temperature;

[0073] 204. When the outdoor temperature is within a preset temperature range and the rotation speed of the outdoor fan is greater than a preset rotation speed, determining a second target pressure value based on the first target pressure value;

[0074] 205. Control the external fan to operate at a second target speed according to the second target pressure.

[0075] The above steps 201 and 202 can refer to Figure 1The specific description of step 101 and step 102 in the illustrated embodiment will not be repeated here; the above steps 201-203 can be executed in any order. For example, step 203 can be executed first, and when it is determined that the outdoor temperature is within the preset temperature range and the speed of the outdoor fan is greater than the preset speed, steps 201 and 202 can be executed to determine the first target pressure, and then the second target pressure value can be confirmed based on the first target pressure value.

[0076] Specifically, an outdoor temperature sensor may be provided in the air conditioning system to collect the outdoor temperature. Based on the above embodiment, when it is detected that the outdoor temperature T is within the preset temperature range (such as satisfying T1≤T≤T2), and the current speed of the outdoor fan is greater than the preset speed (AA% speed), a different control logic may be adopted, that is, calculating the second target pressure value to control the outdoor fan to run at the corresponding second target speed through the second target pressure value; optionally, in other cases, the following may be performed: Figure 1 Process flow in the illustrated embodiment.

[0077] Among them, the above-mentioned second target pressure value can be obtained on the basis of the first target pressure value. The specific calculation method of the second target pressure value can be set as needed, such as setting a parameter value set for calculating the second target pressure value (which can be a second set threshold). Optionally, a specific value can be added or subtracted based on the first target pressure value, or the first target pressure value can be adjusted by a weight parameter to obtain a second target pressure value, etc., and the embodiments of the present application are not limited to this.

[0078] In an optional implementation, the determining of the second target pressure value based on the first target pressure value includes:

[0079] The sum of the first target pressure value and the second set threshold is calculated to obtain the second target pressure value.

[0080] Specifically, the sum of the first target pressure value and the second set threshold value may be calculated as the second target pressure value. Assuming the first target pressure value is Pc and the second set threshold value is N, the second target pressure value is (Pc+N).

[0081] 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 value N are also adjusted and set according to the specific external fan. In some embodiments, the preset speed can be set to 80%. 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. At this time, 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 to achieve 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 and achieve overall energy saving.

[0082] 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, which is not limited here.

[0083] See also Figure 3 , Figure 3 A schematic diagram of the structure of a variable frequency machine room air conditioning system provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the variable frequency machine room air conditioning system 300 includes:

[0084] Compressor 1, condenser 2, flow regulating device 3, evaporator 4, first pressure sensor 5-c, second pressure sensor 5-a, third pressure sensor 5-b, wherein:

[0085] The outlet (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 inlet (intake port) of the compressor 1;

[0086] The first pressure sensor 5-c is arranged at the inlet of the compressor 1, and is used to collect the inlet pressure of the compressor 1. The second pressure sensor 5-a is arranged at the outlet of the compressor 1, and is used to collect the outlet pressure of the compressor 1. The third pressure sensor 5-b is arranged at the inlet of the flow regulating device 3, and is used to collect the inlet pressure of the flow regulating device 3.

[0087] Based on the above variable frequency machine room air conditioning system 300, the following operations can be performed: Figure 1 The method in the embodiment shown is not described in detail here. Figure 1 or Figure 2 The external fan control method of the air conditioning system in the illustrated embodiment is used for regulation.

[0088] Optionally, the variable frequency machine room air conditioning system 300 may further include a control unit, which may communicate with each pressure sensor via a wired connection or a wireless connection, or may communicate with other units (such as the compressor 1, the condenser 2, etc.). Figure 3 The control unit is not marked. The control unit can be any type of controller or processor that can obtain information from other units and perform data processing and system control, including executing Figure 1 or Figure 2 Any step of the method in the illustrated embodiment.

[0089] In the embodiment of the present application, pressure sensors can be arranged on the exhaust pipe of the compressor, in front of the flow regulating device, and on the suction pipe of the compressor, and the unit can be connected into a closed loop to collect pressure values ​​at various locations.

[0090] Optionally, the compressor in the embodiment of the present application may be a variable frequency compressor, such as a rotor compressor, a scroll compressor, a screw compressor or a centrifugal compressor, etc., and the embodiment of the present application is not limited to this.

[0091] In an optional embodiment, the outlet of the compressor 1 is connected to the inlet of the condenser 2 via a connecting air pipe, and the outlet of the condenser 2 is connected to the inlet of the flow regulating device 3 via a connecting liquid pipe.

[0092] For details, see Figure 4 The structure diagram of a long-pipe variable-frequency machine room air conditioning system is shown, wherein the variable-frequency machine room air conditioning system includes:

[0093] Compressor 1, condenser 2, flow regulating device 3, evaporator 4, pressure sensor 5 (including second pressure sensor 5-a, third pressure sensor 5-b, first pressure sensor 5-c), connecting air pipe 6 and connecting liquid pipe 7. The control unit is not shown here, and the speed control of the external fan can be realized based on the system structure and the control unit.

[0094] The exhaust port of the compressor 1 is connected to the inlet of the condenser 2 through a long connecting air pipe 6, the outlet of the condenser 2 is connected to the inlet of the flow regulating device 3 through a long connecting liquid pipe 7, the outlet of the flow regulating device 3 is connected to the inlet of the evaporator 4, and the outlet of the evaporator 4 is connected to the suction port of the compressor 1; a pressure sensor 5-a is set at the outlet of the compressor 1, which can be used to detect the outlet pressure Pa of the compressor, a pressure sensor 5-b is set at the inlet of the flow regulating device 3, which can be used to detect the inlet pressure Pb of the flow regulating device, and a pressure sensor 5-c is set at the inlet of the compressor 1, which can be used to detect the evaporation pressure Pe.

[0095] 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.

[0096] The variable frequency machine room air conditioning system in the embodiment of the present application is combined with Figure 1 or Figure 2 In the control logic of the illustrated embodiment, the external fan speed set point can be set according to the current evaporating pressure and the safety range of the compressor. Compared with the conventional method, a lower target pressure value can be set to control the external fan speed to be higher, thereby reducing the compressor speed, and realizing the compressor running in the refrigeration mode under high temperature conditions and the air pump heat pipe mode under low temperature conditions, thereby achieving energy saving.

[0097] For example, when the air conditioner is turned on, it generally takes a period of time t to start up, and the time t is generally 3 minutes. During the startup time, the speed of the internal and external fans can be adjusted according to the set value X; when the system is started up and the compressor reaches the rated speed, the external fan control logic in the embodiment of the present application can be executed, for example: the current indoor return air temperature is detected, such as when the indoor return air temperature is 24±2°C, the evaporation pressure Pe1=9bar, and the value of (Pa-Pb) detected at this time is 2bar. At this time, the value of A can be 2, then Pc1=9+2+2=13bar is calculated, and the speed of the external fan is controlled by Pc1=13bar; and the above calculation control logic can be checked every Δt, and Δt is 1min;

[0098] Alternatively, the current indoor return air temperature is 35±2℃, the evaporating pressure Pe=11.5bar, and the detected value of (Pa-Pb) is 2bar. At this time, the A value can be 2, Pc2=11.5+2+2=15.5bar, and the external fan speed is controlled by Pc2=15.5bar; and the same calculation control logic can be checked every Δt, Δt is 1min.

[0099] The above data are for example only, and various parameters and calculation formulas or thresholds may be adjusted according to actual conditions, and the embodiments of the present application do not limit this.

[0100] In an optional implementation, the second set threshold N has a value range of 1 to 2 bar.

[0101] As mentioned in the above embodiments, Figure 1 According to the method of the embodiment shown, the pressure setting value used by a conventional variable frequency air conditioner to control the speed of the external fan is generally 18 to 21 bar, so the speed of the external fan is relatively low; while in the embodiment of the present application, through the above-mentioned calculation logic and setting a smaller first setting threshold A, a target pressure value relatively lower than the conventional setting value is determined to control the speed of the external fan, so the speed of the external fan is increased and the speed of the compressor is reduced; because the compressor power usually accounts for 60 to 70% of the power in 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.

[0102] However, in a certain temperature range, when T1≤T≤T2 is satisfied, generally between 5℃ and 20℃, the power of the external fan speed increase will be higher than the power of the compressor speed decrease. This is because the power of the external fan is proportional to the cube of the speed. Figure 2 In the method of the embodiment shown, within the temperature zone and the current external fan speed satisfies>AA% speed, for example, AA% is 80%, the external fan speed setting 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 setting 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 used to control the external fan, and then the speed and power of the external fan are appropriately reduced to achieve overall energy saving. For example, when the current evaporation pressure Pe=11.5bar, the value of (Pa-Pb) is 2bar, and A=2bar, Pc=11.5+2+2=15.5bar calculated by the above method, when the second setting threshold value N=1bar, the corresponding (Pc+N)=15.5+1=16.5bar.

[0103] 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.

[0104] In actual use, computer room air conditioners often have long pipes and high drop conditions. Under such conditions, the pipe pressure loss of the computer room air conditioning system will be very large, and the power consumption of the compressor will also increase with the increase of the pipe length, which will cause the overall power consumption of the computer room air conditioner to increase significantly, which is not energy-efficient. The air conditioning system external fan control method in this application can better reduce the overall power consumption by controlling the speed of the external fan in real time to achieve energy-saving control logic.

[0105] Based on the description of the above-mentioned air conditioning system external fan control method embodiment, the present application embodiment also discloses an air conditioning system external fan control device. Figure 5 As shown, the air conditioning system external fan control device 500 includes:

[0106] A calculation module 510, for calculating a pressure difference according to an outlet pressure of the compressor and an inlet pressure of the flow regulating device;

[0107] The control module 520 is used to determine the target pressure value according to the current evaporation pressure, the pressure difference value and the first set threshold value, and control the rotation speed of the external fan according to the target pressure value.

[0108] Optionally, the control module 520 is specifically used to: calculate the sum of the pressure difference, the current evaporation pressure and the first set threshold to obtain a first target pressure value; and control the external fan to operate at a first target speed according to the first target pressure value.

[0109] Optionally, an acquisition module 530 is also included, which is used to obtain the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulating device and the first set threshold after the system is started and runs for a preset period of time and the compressor reaches the rated speed.

[0110] Optionally, the acquisition module 530 is further used to acquire the outdoor temperature;

[0111] The control module 520 is also used to confirm a second target pressure value based on the first target pressure value when the outdoor temperature is within a preset temperature range and the speed of the outdoor fan is greater than a preset speed; and control the outdoor fan to operate at a second target speed according to the second target pressure value.

[0112] Optionally, the control module 520 is specifically configured to calculate the sum of the first target pressure value and a second set threshold value to obtain the second target pressure value.

[0113] Optionally, the acquisition module 530 is specifically configured to acquire the real-time evaporation pressure and pressure difference after the external fan runs at the first target speed for a predetermined period of time;

[0114] The control module 520 is specifically configured to determine the first target pressure value according to the real-time evaporation pressure and pressure difference, and the first set threshold.

[0115] Optionally, the acquisition module 530 is specifically configured to:

[0116] Determine the current evaporation pressure according to the indoor return air temperature, or detect the current evaporation pressure according to a pressure sensor;

[0117] The first set threshold is determined based on a compression ratio of the compressor, a pressure difference, and a system pressure difference requirement.

[0118] According to an embodiment of the present application, the above-mentioned air conditioning system external fan control device 500 can perform the above-mentioned Figure 1 or Figure 2 The steps in the method embodiment shown are not repeated here.

[0119] 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 6 The electronic device 600 provided by the present application is a schematic diagram of the structure of an electronic device, the electronic device 600 may include a processor 601, an input / output device 602, a memory 603 and a computer storage medium. Among them, the various component units in the electronic device may be connected via a bus 604 or other means.

[0120] The computer storage medium can be stored in the memory 603 of the electronic device 600. 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 601 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.

[0121] 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.

[0122] 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 are not repeated here.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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: The method comprises: After the system is started and runs for a preset time and the compressor reaches a rated speed, the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulating device and the first set threshold are obtained; The obtaining of the first set threshold comprises: determining the first set threshold based on the compression ratio, the pressure difference and the system pressure difference requirement of the compressor; Calculating a pressure difference according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device; Calculating the sum of the pressure difference, the current evaporation pressure, and the first set threshold to obtain a first target pressure value; The external fan is controlled to run at a first target speed according to the first target pressure value.

2. The method for controlling an external fan of an air conditioning system according to claim 1, characterized in that: The method further comprises: Get the outdoor temperature; When the outdoor temperature is within a preset temperature range and the rotation speed of the outdoor fan is greater than a preset rotation speed, determining a second target pressure value based on the first target pressure value; The external fan is controlled to operate at a second target speed according to the second target pressure value.

3. The method for controlling an external fan of an air conditioning system according to claim 2, characterized in that: The determining the second target pressure value based on the first target pressure value includes: The second target pressure value is obtained by calculating the sum of the first target pressure value and the second set threshold value, and the second set threshold value is set according to the specific model of the external fan.

4. The method according to claim 3, characterized in that The method further comprises: After the outdoor fan runs at the first target speed for a predetermined period of time, obtaining a real-time evaporation pressure and a pressure difference; The first target pressure value is determined according to the real-time evaporation pressure and pressure difference, and the first set threshold.

5. The method according to claim 1, characterized in that The obtaining of the current evaporation pressure comprises: The current evaporation pressure is determined according to the indoor return air temperature, or is detected by a pressure sensor.

6. An external fan control device for an air conditioning system, characterized in that: include: An acquisition module, used to acquire the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulating device and the first set threshold value after the system is started and runs for a preset time and the compressor reaches a rated speed; The acquisition module is specifically used to: determine the current evaporation pressure according to the indoor return air temperature, or detect the current evaporation pressure according to the pressure sensor; determine the first set threshold value based on the compression ratio, pressure difference and system pressure difference requirement of the compressor; A calculation module, used for calculating a pressure difference according to an outlet pressure of the compressor and an inlet pressure of the flow regulating device; The control module is used to calculate the sum of the pressure difference, the current evaporation pressure and the first set threshold value to obtain a first target pressure value, and control the external fan to run at a first target speed through the first target pressure value.

7. 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 5.

8. 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 5.

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