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: determining a current evaporation pressure based on a current indoor temperature; confirming a first pressure value based on the current evaporation pressure and a first set threshold value, and controlling the external fan to operate at a first speed based on the first pressure value, wherein different indoor temperatures correspond to different evaporation pressures, and thus the speed of the external fan is reasonably controlled based on the evaporation pressure and the first set threshold value, and the energy consumption of the air-conditioning system can be reduced by controlling the external fan, thereby achieving energy-saving operation 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 power consumption of the compressor, and then the power consumption of the entire air conditioning system will also increase accordingly. The power 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, there is an urgent need for a new external fan control logic that can reduce the energy consumption of the air-conditioning system and achieve energy-saving operation 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, can reduce the power consumption of the air-conditioning system and realize energy-saving operation 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 the current evaporation pressure based on the current indoor temperature;

[0008] A first pressure value is determined according to the current evaporation pressure and a first set threshold value, and the external fan is controlled to operate at a first speed according to the first pressure value.

[0009] Optionally, determining the current evaporation pressure according to the current indoor temperature includes:

[0010] Confirming the indoor temperature range within which the current indoor temperature falls;

[0011] According to the corresponding relationship between the preset indoor temperature range and the evaporation pressure, it is confirmed that the evaporation pressure corresponding to the indoor temperature range in which the current indoor temperature is located is the current evaporation pressure.

[0012] Optionally, in the corresponding relationship between the preset indoor temperature range and the evaporation pressure, the indoor temperature range is positively correlated with the evaporation pressure.

[0013] Optionally, the determining the first pressure value according to the current evaporation pressure and a first set threshold value includes:

[0014] The sum of the current evaporation pressure and the first set threshold is calculated to obtain the first pressure value.

[0015] Optionally, after confirming a first pressure value according to the current evaporation pressure and a first set threshold, and controlling the outdoor fan to run at a first speed according to the first pressure value, the method further includes:

[0016] Get the current outdoor temperature;

[0017] When the current outdoor temperature is within a preset temperature range and the current external fan speed is greater than a preset speed, a second pressure value is determined based on the first pressure value, and the second pressure value is greater than the first pressure value;

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

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

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

[0021] Optionally, the method further includes:

[0022] After the outdoor fan runs at the first speed for a predetermined period of time, obtaining a real-time indoor temperature, and determining a real-time evaporation pressure according to the real-time indoor temperature;

[0023] The first pressure value is confirmed according to the real-time evaporation pressure and the first set threshold.

[0024] In a second aspect, a control device for an external fan of an air conditioning system is provided, comprising:

[0025] A calculation module, used to determine the current evaporation pressure according to the current indoor temperature;

[0026] The calculation module is further used to confirm a first pressure value according to the current evaporation pressure and a first set threshold value;

[0027] A control module is used to control the external fan to run at a first speed according to the first pressure value.

[0028] Optionally, the computing module is specifically used for:

[0029] Confirming the indoor temperature range within which the current indoor temperature falls;

[0030] According to the corresponding relationship between the preset indoor temperature range and the evaporation pressure, it is confirmed that the evaporation pressure corresponding to the indoor temperature range in which the current indoor temperature is located is the current evaporation pressure.

[0031] 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.

[0032] Optionally, it also includes an acquisition module for acquiring the current outdoor temperature;

[0033] The calculation module is further configured to: after confirming a first pressure value according to the current evaporation pressure and a first set threshold value, and controlling the outdoor fan to operate at a first speed according to the first pressure value, and when the current outdoor temperature is within a preset temperature range and the current outdoor fan speed is greater than a preset speed, confirm a second pressure value based on the first pressure value, the second pressure value being greater than the first pressure value;

[0034] The control module is further used to control the external fan to operate at a second speed according to the second pressure value.

[0035] Optionally, the calculation module is further specifically used to: calculate the sum of the first pressure value and a second set threshold to obtain the second pressure value.

[0036] Optionally, the acquisition module is further used to: acquire the real-time indoor temperature after the outdoor fan runs at the first speed for a predetermined period of time;

[0037] The calculation module is also used to determine the real-time evaporation pressure according to the real-time indoor temperature.

[0038] 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.

[0039] 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 first aspect and any possible implementation thereof.

[0040] The air-conditioning system external fan control method in the present application includes at least the following beneficial effects: determining the current evaporation pressure according to the current indoor temperature; confirming a first pressure value according to the current evaporation pressure and a first set threshold value, controlling the external fan to operate at a first speed according to the first pressure value, determining the corresponding evaporation pressure according to the indoor temperature, and determining the speed of the external fan according to the evaporation pressure, so that the speed of the external fan can change with the change of the current indoor temperature, thereby causing the speed of the compressor to change with the change of the external fan, so that the air-conditioning system operates at a matching operating pressure, which can reduce the energy consumption of the air-conditioning system and achieve energy-saving operation of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] 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;

[0043] 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;

[0044] 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;

[0045] 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;

[0046] Figure 5 A schematic diagram of the structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0051] 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:

[0052] 101. Determine the current evaporation pressure according to the current indoor temperature;

[0053] 102. Determine a first pressure value according to the current evaporation pressure and a first set threshold value, and control the outdoor fan to operate at a first speed according to the first pressure value.

[0054] 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.

[0055] 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. In the embodiment of the present application, the current evaporation pressure can be determined by the current indoor temperature (indoor return air temperature). Specifically, a temperature sensor can be set in the air conditioning system to detect the current indoor temperature.

[0056] In the embodiment of the present application, different evaporation pressures Pe can be set according to the indoor temperature Tin, that is, the corresponding relationship between the indoor temperature and the evaporation pressure. After determining the current indoor temperature Tin, the corresponding current evaporation pressure Pe can be determined.

[0057] In an optional implementation, the above step 101 includes:

[0058] Confirm the indoor temperature range within which the current indoor temperature falls;

[0059] According to the corresponding relationship between the preset indoor temperature range and the evaporation pressure, it is confirmed that the evaporation pressure corresponding to the indoor temperature range in which the current indoor temperature is located is the current evaporation pressure.

[0060] Specifically, the correspondence between the preset indoor temperature range and the evaporation pressure can be set as needed, and different indoor temperature ranges correspond to different evaporation pressures. When obtaining the current evaporation pressure, the indoor temperature range in which the current indoor temperature is located can be determined first, and then the corresponding evaporation pressure can be confirmed according to the correspondence between the preset indoor temperature range and the evaporation pressure.

[0061] By judging the temperature range of the indoor temperature, according to the corresponding relationship between the indoor temperature range and the evaporation pressure, the evaporation pressure of the current indoor temperature range is determined, and the first pressure value is calculated according to the evaporation pressure. Since the indoor temperature will change dynamically with the change of the load, if the evaporation pressure is frequently determined by the dynamically changing indoor temperature value, and then the first pressure value is calculated to control the speed of the outdoor fan, the speed of the outdoor fan will affect the heat dissipation capacity of the condenser, and then affect the speed of the compressor, that is, when the indoor temperature changes, the operation of the outdoor fan and the compressor is constantly changing, which will cause the operation of the air conditioning system to be unstable. By dividing the indoor temperature into intervals and corresponding evaporation pressures to different intervals, even if the indoor temperature changes back and forth within a certain interval, the evaporation pressure is constant, so the calculated first pressure value is also constant, and the speed of the outdoor fan is also constant, so that the air conditioning system can operate stably.

[0062] Specifically, multiple sets of indoor temperature ranges and their corresponding evaporation pressures may be set, and the present application embodiment does not limit this. For example, the correspondence between the preset indoor temperature range and the evaporation pressure may be expressed as the following three groups:

[0063] Indoor temperature range [Ta, Tb], the corresponding evaporation pressure is Pe1;

[0064] Indoor temperature range (Tb, Tc], the corresponding evaporation pressure is Pe2;

[0065] Indoor temperature range (Tc, Td], the corresponding evaporation pressure is Pe3;

[0066] For example, if the indoor temperature range of the current indoor temperature Tin is (Tb, Tc], it can be confirmed that the current evaporation pressure is Pe2.

[0067] Further optionally, in the corresponding relationship between the above-mentioned preset indoor temperature range and the evaporation pressure, the above-mentioned indoor temperature range is positively correlated with the above-mentioned evaporation pressure.

[0068] In the corresponding relationship between the above-mentioned preset indoor temperature range and the evaporation pressure, the set indoor temperature range and the evaporation pressure may be positively correlated, that is, when the current indoor temperature is low, the corresponding current evaporation pressure is relatively low, so that the set first pressure value is lower to control the outdoor fan speed to increase and the compressor speed to decrease; because the compressor power usually accounts for 60-70% of the power in an air-conditioning system, and the outdoor fan power accounts for 10-25%, the energy efficiency of the whole machine will be greatly improved after the compressor speed is reduced, thereby achieving the purpose of energy saving.

[0069] After confirming the current evaporation pressure, a first pressure value can be confirmed based on the current evaporation pressure and the first set threshold value, and the first pressure value is a pressure value used to control the speed of the external fan. Thus, the external fan can be controlled to run at a first speed based on the first pressure value, and this process can be recorded as the first control stage.

[0070] Among them, the above-mentioned first set threshold is a parameter value set for calculating the first pressure value, which can be set as needed. It can be specifically 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.

[0071] In an optional implementation, the above step 102 includes:

[0072] 21. Calculate the sum of the current evaporation pressure and the first set threshold to obtain the first pressure value.

[0073] 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.

[0074] In an optional implementation, the above method further includes:

[0075] After the outdoor fan runs at the first speed for a predetermined period of time, obtaining the real-time indoor temperature, and determining the real-time evaporation pressure according to the real-time indoor temperature;

[0076] The first pressure value is determined according to the real-time evaporation pressure and the first set threshold.

[0077] Specifically, in the embodiment of the present application, the external fan control logic of step 101 and step 102 can be periodically executed to realize real-time regulation of the external fan speed. Through the above steps 101 and 102, after the external fan is controlled to run at the first speed (set to w1) according to the confirmed first pressure value (set to P1), the real-time indoor temperature can be obtained again after a predetermined time period to determine the real-time evaporation pressure, so as to update the first 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 second speed w2 through the new second pressure value P2, so as to realize real-time regulation of the external fan speed. That is, it can be understood that the system can check once through the above steps at a specific time interval to obtain an updated pressure value for controlling and updating the external fan speed.

[0078] 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.

[0079] 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. The external fan is controlled by the existing larger external fan pressure value, 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 heat dissipation capacity of the condenser is increased, which will lead to a decrease in the condensing temperature. The decrease in condensing temperature will lead to a decrease in the compression ratio of the compressor and a decrease in the speed of the compressor. Since the speed of the compressor is proportional to the power of the compressor, when the speed of the compressor is reduced, the power of the compressor will also be reduced, thereby greatly improving the energy efficiency of the entire machine and achieving the purpose of energy saving.

[0080] In an optional implementation, after confirming the first pressure value according to the current evaporation pressure and the first set threshold, and controlling the outdoor fan to run at the first speed according to the first pressure value, the method further includes:

[0081] 03. Get the current outdoor temperature;

[0082] 04. When the current outdoor temperature is within the preset temperature range and the current outdoor fan speed is greater than the preset speed, a second pressure value is determined based on the first pressure value, and the second pressure value is greater than the first pressure value;

[0083] 05. Control the above-mentioned external fan to operate at a second speed according to the above-mentioned second pressure value.

[0084] Specifically, an outdoor temperature sensor may be provided in the air conditioning system to collect the outdoor temperature Tout. 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 may 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 second pressure value may be confirmed to control the outdoor fan to run at the second speed.

[0085] On the basis of the above-mentioned embodiment, when it is detected that the current outdoor temperature Tout is within the preset temperature range (such as satisfying T1≤Tout≤T2), and the current external fan speed is greater than the preset speed (AA% speed), a control logic different from the above-mentioned first control stage can be adopted, that is, a second pressure value is calculated to control the external fan to run at the corresponding second speed through the second pressure value. This process can be recorded as the second control stage.

[0086] Among them, the above-mentioned second pressure value can be obtained on the basis of the first pressure value. The specific calculation method of the second pressure value can be set as needed, such as setting a parameter value set for calculating the second pressure value (which can be a second set threshold). Optionally, a specific value can be added to the first pressure value, or the first pressure value can be adjusted by a weight parameter to obtain a relatively larger second pressure value, etc., which is not limited in the embodiments of the present application.

[0087] Optionally, the determining the second pressure value based on the first pressure value includes:

[0088] The sum of the first pressure value and the second set threshold is calculated to obtain the second pressure value.

[0089] 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 second pressure value is (Pc1+N).

[0090] 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 second 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.

[0091] After executing the above step 102, the speed control of the outdoor fan of the air-conditioning system is performed according to the first pressure value P1=Pe+A; then steps 03-05 can be executed. For example, step 03 can be executed first. When it is determined that the current outdoor temperature is within the preset temperature range and the speed of the outdoor fan is greater than the preset speed, steps 04 and 05 are executed to determine the second pressure value P2 based on the first pressure value P1, that is, the speed control of the outdoor fan of the air-conditioning system is performed according to P2=P1+N.

[0092] 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 computer 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 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.

[0093] 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.

[0094] 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:

[0095] 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:

[0096] Detect the current indoor temperature Tin and calculate the current evaporation pressure Pe; where:

[0097] When Ta≤indoor temperature Tin≤Tb, the corresponding evaporation pressure is Pe1;

[0098] When Tb<indoor temperature Tin≤Tc, the corresponding evaporation pressure is Pe2;

[0099] When Tc<indoor temperature Tin≤Td, the corresponding evaporation pressure is Pe3;

[0100] The external fan can be controlled based on the current evaporation pressure Pe and the first set threshold A, that is, set the first pressure value Pc = (Pe + A), so as to control the external fan to operate at the first rotation speed corresponding to Pc;

[0101] After the external fan is controlled according to Pc = (Pe + A), monitor the current external fan rotation speed and the current outdoor temperature;

[0102] When the current outdoor temperature Tout is within the preset temperature range (such as satisfying T1 ≤ Tout ≤ T2), and the current external fan rotation speed is greater than or equal to the preset rotation speed (AA% rotation speed), execute the external fan control logic in the second control stage in the embodiment of the present application:

[0103] Calculate the second pressure value (Pc + N), so as to control the external fan to operate at the second rotation speed corresponding to (Pc + N), and the rotation speed of the external fan can be controlled < BB% rotation speed; where BB% is less than AA%.

[0104] In the embodiment of the present application, different logics are adopted in different temperature zones, and the overall energy saving of the machine is realized through verification when T1 ≤ Tout ≤ T2.

[0105] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a variable-frequency computer room air conditioner system provided by the embodiment of the present application. As Figure 3 shown, the variable-frequency computer room air conditioner system includes:

[0106] 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 rotation speed can be realized.

[0107] 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.

[0108] Optionally, the variable-frequency computer room air conditioner system in the embodiment of the present application can also be configured with components such as an oil separator, a dryer filter, a sight glass, and a gas-liquid separator according to actual conditions, which are not limited here.

[0109] The variable-frequency computer room air conditioner system in the embodiment of the present application, in combination with Figure 1The control logic in the illustrated embodiment determines the current evaporating pressure based on the current indoor temperature, and then confirms the first pressure value based on the current evaporating pressure and a first set threshold value, and controls the external fan to operate at a first speed based on the first pressure value. Different indoor temperatures correspond to different evaporating pressures, so that the external fan speed is reasonably controlled based on the evaporating pressure and the first set threshold value, and the energy-saving operation of the air-conditioning system can be achieved by controlling the external fan; and, by monitoring the current external fan speed and the outdoor temperature, the external fan speed is further reasonably regulated to make the external fan speed more suitable for different outdoor temperatures, thereby reducing the power consumption of the air-conditioning system and improving the system stability.

[0110] 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 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, the current evaporation pressure is determined according to the current indoor temperature, the first pressure value is confirmed according to the current evaporation pressure and the first set threshold, and the outdoor fan is controlled to run at the first speed according to the first pressure value; assuming that specifically:

[0111] Detect the current indoor temperature. For example, when it is 24±2℃, the evaporation pressure Pe1 is 9bar. At this time, the value of A can be 3, then calculate Pc1=Pe1+A=9bar+3bar=12bar, and control the external fan speed through Pc1=12bar;

[0112] Detect the current indoor temperature. For example, when it is 35±2℃, the evaporation pressure Pe2 is 11.5bar. At this time, the value of A can be 3, then Pc2=Pe2+A=11.5bar+3bar=14.5bar is calculated, and the speed of the external fan is controlled by Pc2=14.5bar.

[0113] The setting value of a conventional variable frequency air conditioner 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 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 speed of the compressor is reduced; because the power of the compressor usually accounts for 60 to 70% of an air conditioning system, and the power of the external fan 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;

[0114] In a certain temperature zone, when T1≤Tout≤T2 is satisfied, generally between 5℃ and 20℃, the power of the external fan speed will increase 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. The external fan control logic of the second control stage can be executed: in this temperature zone and the current external fan speed satisfies ≥AA% speed, for example, AA% is 80%, and the external fan speed setting point is adjusted to (Pc+N). The pressure setting value for controlling the external fan speed is appropriately increased through the second set threshold N (it can be understood that the former increase is A, and the latter increase 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 external fan speed and power are appropriately reduced to achieve overall energy saving.

[0115] 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.

[0116] 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 4 As shown, the air conditioning system external fan control device 400 includes:

[0117] A calculation module 410, for determining a current evaporation pressure according to a current indoor temperature;

[0118] The calculation module 410 is further configured to determine a first pressure value according to the current evaporation pressure and a first set threshold value;

[0119] The control module 420 is used to control the external fan to run at a first speed according to the first pressure value.

[0120] Optionally, the calculation module 410 is specifically used for:

[0121] Confirm the indoor temperature range within which the current indoor temperature falls;

[0122] According to the corresponding relationship between the preset indoor temperature range and the evaporation pressure, it is confirmed that the evaporation pressure corresponding to the indoor temperature range in which the current indoor temperature is located is the current evaporation pressure.

[0123] Optionally, the calculation module 410 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.

[0124] Optionally, it also includes an acquisition module 430, which is used to acquire the current outdoor temperature;

[0125] The calculation module 410 is further configured to: after determining a first pressure value according to the current evaporation pressure and the first set threshold, and controlling the outdoor fan to operate at a first speed according to the first pressure value, when the current outdoor temperature is within a preset temperature range and the current outdoor fan speed is greater than a preset speed, determine a second pressure value based on the first pressure value, wherein the second pressure value is greater than the first pressure value;

[0126] The control module 420 is further configured to control the external fan to operate at a second speed according to the second pressure value.

[0127] Optionally, the calculation module 410 is further specifically used to calculate the sum of the first pressure value and the second set threshold value to obtain the second pressure value.

[0128] Optionally, the acquisition module 430 is further used to: acquire the real-time indoor temperature after the outdoor fan runs at the first speed for a predetermined period of time;

[0129] The calculation module 410 is further used to determine the real-time evaporation pressure according to the real-time indoor temperature.

[0130] 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.

[0131] 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.

[0132] 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 2The various steps involved in the method shown, etc.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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 the current evaporation pressure based on the current indoor temperature; Calculating the sum of the current evaporation pressure and a first set threshold to obtain a first pressure value, and controlling the outdoor fan to run 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 requirement of the compressor, and is a parameter value for calculating the first pressure value; Get the current outdoor temperature; When the current outdoor temperature is within the preset temperature range and the current external fan speed is greater than the preset speed, a second pressure value is determined based on the first pressure value, the second pressure value is greater than the first pressure value, and the preset speed is 80% of the speed; The external fan is controlled to operate at a second speed according to the second pressure value.

2. The method for controlling an external fan of an air conditioning system according to claim 1, characterized in that: Determining the current evaporation pressure according to the current indoor temperature includes: Confirming the indoor temperature range within which the current indoor temperature falls; According to the corresponding relationship between the preset indoor temperature range and the evaporation pressure, it is confirmed that the evaporation pressure corresponding to the indoor temperature range in which the current indoor temperature is located is the current evaporation pressure.

3. The method for controlling an external fan of an air conditioning system according to claim 2, characterized in that: In the corresponding relationship between the preset indoor temperature range and the evaporation pressure, the indoor temperature range is positively correlated with the evaporation pressure.

4. The method for controlling an external fan of an air conditioning system according to claim 1, characterized in that: The determining a second pressure value based on the first pressure value includes: The sum of the first pressure value and a second set threshold is calculated to obtain the second pressure value; the second set threshold is set based on the compression ratio, pressure difference and system pressure difference requirement of the compressor, in order to calculate the parameter value of the second pressure value.

5. The method according to claim 1, characterized in that: The method further comprises: After the outdoor fan runs at the first speed for a predetermined period of time, obtaining a real-time indoor temperature, and determining a real-time evaporation pressure according to the real-time indoor temperature; The first pressure value is confirmed according to the real-time evaporation pressure and the first set threshold.

6. 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.

7. 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 as described in any one of claims 1 to 5.

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