CN115031355A - External fan control method and device of air conditioning system, electronic equipment and storage medium - Google Patents
External fan control method and device of air conditioning system, electronic equipment and storage medium Download PDFInfo
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- CN115031355A CN115031355A CN202210757749.5A CN202210757749A CN115031355A CN 115031355 A CN115031355 A CN 115031355A CN 202210757749 A CN202210757749 A CN 202210757749A CN 115031355 A CN115031355 A CN 115031355A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The application discloses an air conditioning system external fan control method, device, electronic equipment and storage medium, wherein the method comprises the following steps: confirming a target pressure value according to a first pressure value, the current rotating speed of the outer fan and the current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outer fan to operate at the current rotating speed of the outer fan; the outer fan is controlled to operate at the target rotating speed according to the target pressure value, the rotating speed of the compressor can be adjusted according to different outdoor temperatures, the air conditioning system is enabled to operate at the matched working condition pressure, and the energy consumption of the air conditioning system is reduced.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an external fan control method and device of an air conditioning system, electronic equipment and a storage medium.
Background
With the promotion and promotion of a series of informatization projects such as ' internet + ' big data application ', the scale and the quantity of data centers are rapidly developed and become power utilization consumers of an information society. The data center provides great convenience for the development of the modern society, but the power consumption of the data center is high.
In practical application, the difference of the use environment of the variable frequency machine room air conditioner is large, the working effect is influenced by environmental factors, and in the process of realizing the invention, the inventor finds that at least the following problems exist in the prior art: when the variable frequency machine room air conditioner works under the working conditions of high-temperature working conditions, low-temperature working conditions and the like, because the machine room air conditioner mainly adopts the compressor with the constant compression ratio, when the outdoor environment temperature is higher or lower, the compressor with the constant compression ratio is not matched with the external required working condition pressure, so that the energy consumption of the compressor is higher, and further the energy consumption of the whole air conditioning system is correspondingly increased. The energy consumption of the air conditioning system is mainly determined by the external fan and the compressor, and although the prior art also has a scheme of adjusting the compression ratio of the compressor by adjusting the rotating speed of the external fan to realize low-energy-consumption heat dissipation of a machine room, the existing external fan control logics still cannot well reduce the energy consumption of the air conditioning system.
Therefore, a new external fan control logic is needed to reduce the energy consumption of the air conditioning system.
Disclosure of Invention
The application provides an air conditioning system external fan control method, device, electronic equipment and storage medium, and the energy consumption of the air conditioning system can be reduced by adopting a new external fan control logic.
In a first aspect, a method for controlling an external fan of an air conditioning system is provided, which includes:
determining a target pressure value according to a first pressure value, the current rotating speed of the outer fan and the current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outer fan to operate at the current rotating speed of the outer fan;
and controlling the outer fan to operate at a target rotating speed according to the target pressure value.
Optionally, the determining the target pressure value according to the first pressure value, the current outer fan rotating speed and the current outdoor temperature includes:
and confirming the target pressure value based on the first pressure value under the condition that the current outdoor temperature is within a preset temperature range and the current outer fan rotating speed is greater than a preset rotating speed, wherein the target pressure value is greater than the first pressure value.
Optionally, the determining the target pressure value based on the first pressure value includes:
and calculating the sum of the first pressure value and a second set threshold value to obtain the target pressure value.
Optionally, the determining the target pressure value according to the first pressure value, the current outer fan rotating speed and the current outdoor temperature includes:
and acquiring a preset pressure value as the target pressure value under the condition that the current outdoor temperature is less than a preset temperature threshold value.
Optionally, before the target pressure value is determined according to the first pressure value, the current outer fan rotation speed, and the current outdoor temperature, the method further includes:
and confirming the first pressure value according to the current evaporation pressure and a first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value.
Optionally, the determining the first pressure value according to the current evaporation pressure and a first set threshold includes:
and calculating the sum of the current evaporation pressure and the first set threshold value to obtain the first pressure value.
Optionally, the current evaporating pressure is determined according to the indoor return air temperature, or is detected and obtained according to a pressure sensor.
In a second aspect, an external blower control device for an air conditioning system is provided, including:
the calculation module is used for confirming a target pressure value according to a first pressure value, the current rotating speed of the outer fan and the current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outer fan to operate at the current rotating speed of the outer fan;
and the control module is used for controlling the outer fan to operate at a target rotating speed according to the target pressure value.
Optionally, the calculation module is specifically configured to: and confirming the target pressure value based on the first pressure value under the condition that the current outdoor temperature is within a preset temperature range and the current outer fan rotating speed is greater than a preset rotating speed, wherein the target pressure value is greater than the first pressure value.
Optionally, the calculating module is specifically configured to calculate a sum of the first pressure value and a second set threshold, so as to obtain the target pressure value.
Optionally, the computing module is further specifically configured to: and acquiring a preset pressure value as the target pressure value under the condition that the current outdoor temperature is less than a preset temperature threshold value.
Optionally, the calculating module is further configured to: before confirming the target pressure value according to the first pressure value, the current rotating speed of the outer fan and the current outdoor temperature, confirming the first pressure value according to the current evaporation pressure and a first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value.
Optionally, the computing module is further specifically configured to: and calculating the sum of the current evaporation pressure and the first set threshold value to obtain the first pressure value.
Optionally, the current evaporating pressure is determined according to the indoor return air temperature, or is obtained according to the detection of a pressure sensor.
In a third aspect, an electronic device is provided, comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps as in the first aspect and any one of its possible implementations.
In a fourth aspect, a computer storage medium is provided, which stores one or more instructions adapted to be loaded by a processor and to perform the steps of the first aspect and any possible implementation thereof as described above.
The control method of the external fan of the air conditioning system at least comprises the following beneficial effects: confirming a target pressure value according to a first pressure value, the current rotating speed of the outer fan and the current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outer fan to operate at the current rotating speed of the outer fan; the control method comprises the steps of controlling the outer fan to operate at a target rotating speed according to the target pressure value, controlling the rotating speed of the outer fan by controlling the target pressure when the air conditioning system operates in a high-temperature working condition or a low-temperature working condition, wherein the rotating speed of the outer fan can influence the condensation temperature and further influence the rotating speed of the compressor, and changing the rotating speed of the compressor by changing the rotating speed of the outer fan, so that the energy consumption of the compressor is changed along with the change of the rotating speed of the compressor.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.
Fig. 1 is a schematic flowchart of an external fan control method of an air conditioning system according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of another method for controlling an external fan of an air conditioning system according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an air conditioning system of an inverter room according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an external blower control device of an air conditioning system according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device provided in the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The embodiments of the present application will be described below with reference to the drawings.
Referring to fig. 1, fig. 1 is a schematic flow chart of an external fan control method of an air conditioning system according to an embodiment of the present application, and as shown in fig. 1, the method includes:
101. confirming a target pressure value according to a first pressure value, the current rotating speed of the outer fan and the current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outer fan to operate at the current rotating speed of the outer fan;
102. and controlling the outer fan to operate at the target rotating speed according to the target pressure value.
The method for controlling the external fan of the air conditioning system in the embodiment of the application can be applied to the air conditioning system, and particularly can be an air conditioning system of a variable frequency machine room. The air conditioning system of the inverter machine room can comprise common components such as a compressor, a flow device, an external fan and the like, and the embodiment of the application does not limit the common components. Wherein, the software control flow of the system can realize the processing based on the control unit.
The first pressure value is a current pressure value corresponding to the current outer fan rotating speed, for example, the current outer fan rotating speed is controlled according to the first pressure value and recorded as a first rotating speed, and the process can be recorded as a first control stage.
The embodiment of the application can be based on the current control parameters of the outer fan: and the rotating speed of the outer fan is further controlled by the first pressure value and the current rotating speed of the outer fan, namely the second control stage.
Specifically, an outdoor temperature sensor may be provided in the air conditioning system to collect the outdoor temperature. On the basis of controlling the current rotating speed of the outer fan based on the first pressure value, the current rotating speed of the outer fan and the current outdoor temperature can be judged, and whether the current rotating speed of the outer fan is further adjusted or not is determined. The adjustment is mainly to change the current rotating speed of the outer fan by adjusting the first pressure value, so that a new target pressure value can be confirmed to control the outer fan to operate at the target rotating speed. When the air conditioning system operates in a high-temperature working condition or a low-temperature working condition, the rotating speed of the outer fan is controlled by controlling the target pressure, the rotating speed of the outer fan can influence the condensation temperature, the rotating speed of the compressor is further influenced, the rotating speed of the compressor is changed by changing the rotating speed of the outer fan, the energy consumption of the compressor is changed along with the change of the rotating speed of the compressor, the rotating speed of the outer fan can be further reasonably regulated and controlled according to the current rotating speed of the outer fan and the outdoor temperature, the rotating speed of the compressor can be adjusted according to different outdoor temperatures, the air conditioning system is enabled to operate at the matched working condition pressure, and the energy consumption of the air conditioning system can be reduced.
In an alternative embodiment, the step 101 includes:
and confirming the target pressure value based on the first pressure value under the condition that the current outdoor temperature is within a preset temperature range and the current outer fan rotating speed is greater than a preset rotating speed, wherein the target pressure value is greater than the first pressure value.
Specifically, when the current outdoor temperature T is detected to be within the preset temperature range (e.g., T is equal to or greater than T1 and equal to or less than T2) and the current outer fan rotation speed is greater than the preset rotation speed (AA% rotation speed), a control logic different from that in the first control stage may be adopted, that is, a target pressure value is calculated, so as to control the outer fan to operate at a corresponding target rotation speed through the target pressure value.
Wherein the target pressure value may be obtained on the basis of the first pressure value. The specific calculation method of the target pressure value may be set as needed, such as setting a parameter value (which may be the second set threshold value) set for calculating the target pressure value. Optionally, a specific value may be added on the basis of the first pressure value, or the first pressure value may be adjusted by using a weight parameter to obtain a relatively larger target pressure value, and the like, which is not limited in the embodiment of the present application.
In an alternative embodiment, the identifying a second pressure value based on the first pressure value includes,
and calculating the sum of the first pressure value and a second set threshold value to obtain the target pressure value.
Specifically, the sum of the first pressure value and the second set threshold value may be calculated as the target pressure value. Assuming that the first pressure value is Pc1 and the second set threshold value is N, the target pressure value is (Pc1+ N).
The T1 and T2 may be adjusted and controlled according to a specific model, and the preset rotation speed and the second set threshold N are also adjusted and set according to a specific external wind turbine. The second set threshold is a parameter value set for calculating the target pressure value, and may be set as needed, and may be specifically determined based on the compression ratio of the compressor, the pressure difference, and the system pressure difference requirement, which is not limited in this embodiment of the application.
Because the power of the external fan is in direct proportion to the 3 rd power of the rotating speed of the external fan, when the rotating speed of the external fan is higher than a certain rotating speed, the air volume increasing amplitude is smaller than the power increasing amplitude, and at the moment, although the rotating speed of the compressor can be reduced by increasing the rotating speed of the external fan, the reducing amplitude is not as large as the power increasing amplitude of the external fan, therefore, through the steps in the embodiment of the application, a higher pressure set value of the external fan is adopted to control the external fan, the rotating speed reducing amplitude of the external fan is larger, the heat dissipation capacity of the condenser is reduced, the condensation temperature is increased, the rotating speed of the compressor is reduced by increasing the condensation temperature, the rotating speed of the compressor is reduced due to the fact that the rotating speed of the compressor is in direct proportion to the power of the compressor, and the power of the compressor is reduced after the rotating speed of the compressor is reduced, and therefore, the whole energy conservation is achieved. Specifically, the variable frequency machine room air conditioning system in the embodiment of the application can adopt different logics under different temperature zones, and when T is more than or equal to T1 and less than or equal to T2, the target pressure value for controlling the outer fan can be further increased to control the reduction of the rotating speed and the power of the outer fan, so that the overall energy conservation is realized.
In an optional implementation, the step 101 further includes:
and acquiring a preset pressure value as the target pressure value under the condition that the current outdoor temperature is less than a preset temperature threshold value.
Specifically, the preset temperature threshold T0 can be set as required, for example, T0 is-15 to-20 ℃. When the current outdoor temperature T is lower than T0, the current rotating speed of the outer fan can be directly set to be a fixed rotating speed, namely, a preset pressure value X is obtained, and the outer fan is controlled to operate at the fixed rotating speed according to the preset pressure value X.
The preset pressure value X may be determined according to specific situations. In an alternative embodiment, the preset pressure value X may be a set value between 15 and 20 bar. Under the outdoor low-temperature condition, the current evaporation pressure is unstable under the condition that the outer fan is in the on/off state, so that the rotating speed of the outer fan can be directly set without controlling the rotating speed of the outer fan according to the current evaporation pressure, and the stable control of the system is further realized.
In an alternative embodiment, before the step 101, the method further includes:
01. and confirming the first pressure value according to the current evaporation pressure and a first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value.
Step 01 is the control logic of the first control stage. The first set threshold is a parameter value set for calculating the first pressure value, and may be set as needed, and may be specifically determined based on a compression ratio of the compressor, a pressure difference and a system pressure difference requirement, which is not limited in this embodiment of the application.
Further optionally, the step 01 includes:
and calculating the sum of the current evaporation pressure and the first set threshold value to obtain the first pressure value.
Specifically, the sum of the current evaporation pressure Pe and the first set threshold value a may be calculated to obtain a first pressure value Pc, so as to control the rotation speed of the external fan by using the first pressure value Pc, where the rotation speed of the external fan corresponding to the first pressure value Pc is the first rotation speed. I.e. can be understood as: and setting the value of Pc to Pe + A, so as to control the outer fan to operate at the first rotating speed corresponding to Pc.
After step 01 is executed, the rotating speed of an external fan of the air conditioning system is controlled according to Pc-Pe + A; and then, step 101 and step 102 may be executed, that is, the target pressure value may be further determined according to the current rotating speed of the outer fan and the current outdoor temperature, and the outer fan is controlled to operate at the target rotating speed according to the target pressure value, which is not described herein again.
Optionally, in the embodiment of the present application, the current evaporation pressure may be obtained in two ways:
and determining the current evaporating pressure according to the indoor return air temperature, or detecting the current evaporating pressure according to a pressure sensor.
When the air conditioning system is started, the evaporation pressure can be dynamically changed until the air conditioning system is stable in operation and the evaporation pressure is fixed, and then the current evaporation pressure can be determined through the current indoor return air temperature. Specifically, can set up temperature sensor among the air conditioning system and detect indoor return air temperature, can correspond according to indoor return air temperature and set out different evaporating pressure Pe in this application embodiment, the corresponding relation of indoor return air temperature and current evaporating pressure promptly. Then after the current indoor return air temperature is determined, the corresponding current evaporating pressure Pe may be determined.
Optionally, when the working condition of the air conditioning system changes, an error exists in the determination of the indoor return air temperature, and the inlet pressure (air suction port pressure) of the compressor is approximate to the evaporation pressure, so that the current evaporation pressure Pe can be obtained by measuring in real time through a pressure sensor arranged at the air suction port of the compressor.
In an alternative embodiment, the method further comprises:
acquiring real-time evaporation pressure after the external fan operates at the first rotating speed for a preset time period;
and confirming the first pressure value according to the real-time evaporation pressure and a first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value.
Specifically, in this embodiment of the present application, the step 01, or the step 101 and the step 102 may be periodically executed, so as to implement real-time regulation and control of the rotating speed of the external fan.
In the first control phase, the determination of the current external fan speed and the current outdoor temperature may also be performed periodically. When the current outdoor temperature is detected to be in the preset temperature range and the current rotating speed of the outer fan is greater than the preset rotating speed, the first control logic of the second control stage is entered: further confirming a target pressure value by the method to adjust the rotating speed of the outer fan; when the current outdoor temperature is smaller than the preset temperature threshold, entering a second control logic of a second control stage: directly acquiring a preset pressure value as a target pressure value to adjust the rotating speed of the outer fan; when the above two conditions are not detected, the control logic of the first control stage may be continuously executed, for example, step 01: and confirming a first pressure value according to the current evaporation pressure and a first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value.
In the embodiment of the present application, a sensor in the system may also be adjusted or added as needed to achieve the required data acquisition and monitoring, so as to provide reasonable control for the system or the control unit, which is not limited in the embodiment of the present application.
Fig. 2 is a schematic flowchart of another method for controlling an external fan of an air conditioning system according to an embodiment of the present application. As shown in fig. 2, in a specific embodiment, the method for controlling the external fan of the air conditioning system in the embodiment of the present application may include:
after the air conditioning system is started for a preset time t, entering an air pump mode, and executing an external fan control logic of a first control stage in the embodiment of the application;
detecting the current evaporation pressure Pe, and controlling the outer fan according to the current evaporation pressure Pe and a first set threshold a, that is, setting a first pressure value Pc ═ (Pe + a), so as to control the outer fan to operate at a first rotation speed corresponding to Pc;
after the outer fan is controlled according to Pc ═ Pe + A, monitoring the current rotating speed of the outer fan and the current outdoor temperature; when the current outdoor temperature T is within the preset temperature range (for example, T1 ≦ T2 is satisfied), and the current outer fan rotation speed is greater than or equal to the preset rotation speed (AA% rotation speed), executing an outer fan control logic of the second control phase in the embodiment of the present application: calculating a target pressure value (Pc + N) so as to control the outer fan to operate at a target rotating speed corresponding to the target pressure value (Pc + N), wherein the rotating speed of the outer fan can be controlled to be less than BB% rotating speed; the AA% rotating speed can be 80%, when the rotating speed of the outer fan is greater than 80%, the rotating speed increasing range of the outer fan is controlled through the first pressure value and is lower than the rotating speed increasing range of the outer fan which is controlled through the first pressure value when the rotating speed of the outer fan is less than 80%, for example, when the rotating speed of the outer fan is greater than 80%, the rotating speed of the outer fan is Y-turn, the condenser value is reduced by 1bar at the moment, the rotating speed reducing range of the compressor is small, the outer wind speed is controlled to be lower than 80%, the value of the condenser is reduced more, the reducing range of the compressor is larger, and therefore the whole energy saving is achieved.
When the current outdoor temperature T < the preset temperature threshold T0, another external fan control logic of the second control stage in the embodiment of the present application is executed: and directly setting a preset pressure value X to control the rotating speed of the outer fan to operate at the rotating speed corresponding to the preset pressure value X. Because the device selection of the condenser is determined, factors influencing the heat dissipation capacity of the condenser mainly comprise the rotating speed of the outer fan, when the rotating speed of the outer fan is fixed, the heat dissipation capacity of the condenser is stable, the condensation temperature is stable, and the pressure of the system is stable, so that when the outdoor temperature T is less than the preset temperature threshold value T0, the whole machine can stably operate by directly setting the preset pressure value X.
In the embodiment of the application, different logics are adopted at different temperature regions, when T is more than or equal to T1 and less than or equal to T2, the energy conservation of the whole machine is realized through checking, and when T is less than T0, a value is directly set to realize the stable operation of the unit.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an inverter room air conditioning system provided in an embodiment of the present application, and as shown in fig. 3, the inverter room air conditioning system includes:
a compressor 1, a condenser 2, a flow rate adjusting device 3, and an evaporator 4. The control unit is not shown here, and the outer fan speed control can be realized based on the system structure and the control unit.
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 air suction port of the compressor 1.
Optionally, a pressure sensor may be further disposed at an air suction port of the compressor in the air conditioning system of the inverter room. When the working condition of the air conditioning system changes, an error exists in the determination of the indoor return air temperature, and the inlet pressure (air suction port pressure) of the compressor is approximate to the evaporation pressure, so that the current evaporation pressure Pe can be obtained by measuring in real time through a pressure sensor arranged at the air suction port of the compressor.
Optionally, the inverter room air conditioning system in the embodiment of the present application may further include an oil separator, a dry filter, a liquid viewing mirror, a gas-liquid separator, and other components according to actual situations, which is not limited herein.
The frequency conversion computer lab air conditioning system in this application embodiment combines the control logic in the embodiment shown in fig. 1, through monitoring current outer fan rotational speed and outdoor temperature, further rationally regulates and control to outer fan rotational speed, makes outer fan rotational speed more be applicable to different outdoor temperatures, makes air conditioning system with the operating mode pressure operation of matching, reduces air conditioning system's energy consumption.
For example, when the air conditioner is started, a start time t is generally required, the time t is generally 3min, the rotating speeds of the inner and outer fans can be regulated and controlled according to a set value during the start time, and after the system is started and the compressor reaches a rated rotating speed, the outer fan control logic of the first control stage can be executed, for example: confirming a first pressure value according to the current evaporation pressure and a first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value; the assumption is specifically that: and detecting the current indoor return air temperature, for example, when the indoor return air temperature is 24 +/-2 ℃, if the evaporation pressure Pe is 9bar, the A value can be 3, calculating the Pc 1-Pe 1+ A-9 bar +3 bar-12 bar value, and controlling the rotating speed of the external fan through the Pc 1-12 bar value. The pressure set value of an external fan of the conventional variable frequency air conditioner is generally 18-21 bar, so that the rotating speed of the external fan is low; the evaporation pressure is generally 8.5-12.5bar, and in the embodiment of the application, through the above calculation logic and setting of a smaller first set threshold value a, a relatively lower target pressure value than a conventional set value is determined to control the rotation speed of the external fan, so that the rotation speed of the external fan is increased, the rotation speed of the external fan is increased to reduce the condensation pressure, and the condensation pressure is positively correlated with the condensation temperature, so that the condensation temperature is reduced, the pressure of the air conditioning system is reduced, and the rotation speed of the compressor is reduced; because the power of the compressor accounts for 60-70% in an air conditioning system and the power of the external fan accounts for 10-25%, the energy efficiency of the whole air conditioning system is greatly improved after the rotating speed of the compressor is reduced, and the purpose of energy conservation is achieved;
in a certain temperature zone, when T is more than or equal to T1 and less than or equal to T2, the temperature is generally between 5 ℃ and 20 ℃, the power of the rotating speed of the external fan is improved and is higher than the power of the rotating speed reduction of the compressor, because the power of the external fan is in direct proportion to the 3-time power of the rotating speed; an external fan control logic that can perform a second control phase: in the temperature region and the current rotating speed of the outer fan meets the rotating speed of more than AA%, for example, the AA% is 80%, the rotating speed set point of the outer fan is adjusted to be (Pc + N), and compared with the control logic of the embodiment shown in FIG. 1, the pressure set value for controlling the rotating speed of the outer fan is also properly increased by the second set threshold N (the former increased value is A, and the latter increased value is A + N), in this case, the pressure set value of the outer fan which is a little higher than the former can be adopted to control the outer fan, and further, the rotating speed and the power of the outer fan are properly reduced, so that the overall energy saving is realized;
while when the outdoor temperature is below T0, another external fan control logic for the second control phase may be implemented, such as: generally, T0 is-15 to-20 ℃, the target pressure value is directly set as X, the X value can be determined according to specific conditions, for example, a set value between 15 and 20bar, and the external fan is controlled to operate at a corresponding rotating speed according to the preset pressure value X. When the outdoor fan is in an on/off state at a low outdoor temperature, the current evaporation pressure is unstable, and the system stability control can be realized by directly setting the rotating speed value of the outdoor fan, so that the situation that the operation of the outdoor fan is influenced due to the change of the calculated target pressure value caused by the change of the evaporation pressure is avoided.
The above embodiments are only illustrative, and in practical applications, the corresponding setting values may be adjusted according to needs, which is not limited in the embodiments of the present application.
Based on the description of the embodiment of the control method of the variable frequency air conditioner, the embodiment of the application also discloses an external fan control device of the air conditioning system. As shown in fig. 3, the air conditioning system external blower control device 400 includes:
a calculating module 410, configured to determine a target pressure value according to a first pressure value, a current rotation speed of the external fan, and a current outdoor temperature, where the first pressure value is a pressure value for controlling the external fan to operate at the current rotation speed of the external fan;
and the control module 420 is configured to control the outer fan to operate at the target rotation speed according to the target pressure value.
Optionally, the calculating module 410 is specifically configured to:
and confirming the target pressure value based on the first pressure value under the condition that the current outdoor temperature is within a preset temperature range and the current outer fan rotating speed is greater than a preset rotating speed, wherein the target pressure value is greater than the first pressure value.
Optionally, the calculating module 410 is specifically configured to calculate a sum of the first pressure value and a second set threshold, so as to obtain the target pressure value.
Optionally, the calculating module 410 is specifically configured to:
and acquiring a preset pressure value as the target pressure value under the condition that the current outdoor temperature is less than a preset temperature threshold value.
Optionally, the calculating module 410 is further configured to determine the first pressure value according to the current evaporation pressure and a first set threshold;
the control module 420 is further configured to control the outer fan to operate at a first rotation speed according to the first pressure value.
Optionally, the calculating module 410 is further configured to calculate a sum of the current evaporation pressure and the first set threshold, so as to obtain the first pressure value.
Optionally, the current evaporating pressure is determined according to the indoor return air temperature, or is detected and obtained according to a pressure sensor.
According to an embodiment of the present application, the air conditioner external fan control device 400 may perform the steps in the method embodiments shown in fig. 1 or fig. 2, which are not described herein again.
Based on the description of the method embodiment and the device embodiment, the embodiment of the present application further provides an electronic device, which may be an electronic device of an air conditioning system, such as an inverter air conditioner. As shown in fig. 5, which is a schematic structural diagram of an electronic device provided in the present application, the electronic device 500 may include a processor 501, an input/output device 502, a memory 503, and a computer storage medium. Wherein the various component units within the electronic device may be connected by a bus 504 or otherwise.
A computer storage medium may be stored in the memory 503 of the electronic device 500, the computer storage medium being configured to store a computer program comprising program instructions, the processor 601 being configured to execute the program instructions stored by the computer storage medium. A processor (or CPU) is a computing core and a control core of an electronic device, and is adapted to implement one or more instructions, and in particular, is adapted to load and execute the one or more instructions so as to implement a corresponding method flow or a corresponding function; in one embodiment, the processor 501 described above in this embodiment of the present application may be configured to perform a series of processes, including the steps involved in the method shown in fig. 1 or fig. 2.
An embodiment of the present application further provides a computer storage medium (Memory), which is a Memory device in an electronic device and is used for storing programs and data. It is understood that the computer storage medium herein may include both a built-in storage medium in the electronic device and, of course, an extended storage medium supported by the electronic device. Computer storage media provide storage space that stores an operating system for an electronic device. Also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), suitable for loading and execution by the processor. The computer storage medium may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory; and optionally at least one computer storage medium located remotely from the processor.
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 embodiments; in a specific implementation, one or more instructions in the computer storage medium may be loaded by the processor and perform the steps involved in the method shown in fig. 1 or fig. 2, which are not described herein again.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the division of the module is only one logical division, and other divisions may be possible in actual implementation, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not performed. The shown or discussed mutual coupling, direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on or transmitted over a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable 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 magnetic tape, a magnetic disk, or an optical medium, such as a Digital Versatile Disk (DVD), or a semiconductor medium, such as a Solid State Disk (SSD).
Claims (10)
1. An external fan control method of an air conditioning system is characterized by comprising the following steps:
confirming a target pressure value according to a first pressure value, the current rotating speed of the outer fan and the current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outer fan to operate at the current rotating speed of the outer fan;
and controlling the outer fan to operate at a target rotating speed according to the target pressure value.
2. The method of claim 1, wherein the determining the target pressure value according to the first pressure value, the current outer fan speed and the current outdoor temperature comprises:
and confirming the target pressure value based on the first pressure value under the condition that the current outdoor temperature is within a preset temperature range and the current outer fan rotating speed is greater than a preset rotating speed, wherein the target pressure value is greater than the first pressure value.
3. The method of claim 2, wherein the identifying the target pressure value based on the first pressure value comprises:
and calculating the sum of the first pressure value and a second set threshold value to obtain the target pressure value.
4. The method of claim 1, wherein the determining the target pressure value according to the first pressure value, the current outer fan speed and the current outdoor temperature comprises:
and acquiring a preset pressure value as the target pressure value under the condition that the current outdoor temperature is smaller than a preset temperature threshold value.
5. The air conditioning system outer fan control method according to any one of claims 1 to 4, wherein before the confirming of the target pressure value based on the first pressure value, the current outer fan rotation speed, and the current outdoor temperature, the method further comprises:
and confirming the first pressure value according to the current evaporation pressure and a first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value.
6. The method as claimed in claim 5, wherein the confirming the first pressure value according to the current evaporating pressure and a first set threshold value comprises:
and calculating the sum of the current evaporation pressure and the first set threshold value to obtain the first pressure value.
7. The method of claim 6, wherein the current evaporating pressure is determined from an indoor return air temperature or is detected from a pressure sensor.
8. An external fan control device of an air conditioning system, comprising:
the calculation module is used for confirming a target pressure value according to a first pressure value, the current rotating speed of the outer fan and the current outdoor temperature, wherein the first pressure value is a pressure value for controlling the outer fan to operate at the current rotating speed of the outer fan;
and the control module is used for controlling the outer fan to operate at a target rotating speed according to the target pressure value.
9. An electronic device, comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the air conditioning system external fan control method of any of claims 1 to 7.
10. A computer-readable storage medium, characterized in that a computer program is stored which, when being executed by a processor, causes the processor to carry out the steps of the air conditioning system external fan control method according to any one of claims 1 to 7.
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