CN115031354A - 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 PDF

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Publication number
CN115031354A
CN115031354A CN202210757747.6A CN202210757747A CN115031354A CN 115031354 A CN115031354 A CN 115031354A CN 202210757747 A CN202210757747 A CN 202210757747A CN 115031354 A CN115031354 A CN 115031354A
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pressure
current
pressure value
indoor temperature
rotating speed
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王飞
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Suzhou Envicool Temperature Control Technology Co ltd
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Suzhou Envicool Temperature Control Technology Co ltd
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Priority to CN202210757747.6A priority Critical patent/CN115031354A/en
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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

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: determining the current evaporation pressure according to the current indoor temperature; and confirming a first pressure value according to the current evaporation pressure and a first set threshold value, controlling the outer fan to operate at a first rotating speed according to the first pressure value, and controlling different indoor temperatures to correspond to different evaporation pressures, so that the rotating speed of the outer fan is reasonably controlled according to the evaporation pressure and the first set threshold value, the energy consumption of the air conditioning system can be reduced through controlling the outer fan, and the energy-saving operation of the air conditioning system is realized.

Description

External fan control method and device of air conditioning system, electronic equipment and storage medium
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 power consumption of the compressor is higher, and further the power consumption of the whole air conditioning system is correspondingly increased. The power 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 and achieve energy-saving operation 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 a new external fan control logic is adopted, so that the power consumption of the air conditioning system can be reduced, and the energy-saving operation of the air conditioning system is realized.
In a first aspect, a method for controlling an external fan of an air conditioning system is provided, which includes:
determining the current evaporation pressure according to the current indoor temperature;
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.
Optionally, the determining the current evaporating pressure according to the current indoor temperature includes:
confirming an indoor temperature range in which the current indoor temperature is;
and confirming that the evaporation pressure corresponding to the indoor temperature range where the current indoor temperature is located is the current evaporation pressure according to the corresponding relation between the preset indoor temperature range and the evaporation pressure.
Optionally, in the corresponding relationship between the preset indoor temperature range and the evaporation pressure, the indoor temperature range and the evaporation pressure are in positive correlation.
Optionally, the determining a 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, after determining a first pressure value according to the current evaporation pressure and a first set threshold, and controlling the outer fan to operate at a first rotation speed according to the first pressure value, the method further includes:
acquiring the current outdoor temperature;
when the current outdoor temperature is within a preset temperature range and the current outer fan rotating speed is larger than a preset rotating speed, confirming a second pressure value based on the first pressure value, wherein the second pressure value is larger than the first pressure value;
and controlling the outer fan to operate at a second rotating speed according to the second pressure value.
Optionally, the determining 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 second pressure value.
Optionally, the method further includes:
after the outer fan runs at the first rotating speed for a preset time period, acquiring real-time indoor temperature, and determining real-time evaporation pressure according to the real-time indoor temperature;
and confirming the first pressure value according to the real-time evaporation pressure and the first set threshold value.
In a second aspect, an external blower control device for an air conditioning system is provided, including:
the calculation module is used for determining the current evaporation pressure according to the current indoor temperature;
the calculation module is further used for confirming a first pressure value according to the current evaporation pressure and a first set threshold;
and the control module is used for controlling the outer fan to operate at a first rotating speed according to the first pressure value.
Optionally, the calculation module is specifically configured to:
confirming an indoor temperature range in which the current indoor temperature is;
and confirming that the evaporation pressure corresponding to the indoor temperature range where the current indoor temperature is located is the current evaporation pressure according to the corresponding relation between the preset indoor temperature range and the evaporation pressure.
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 system further comprises an obtaining module, configured to obtain a current outdoor temperature;
the computing module is further configured to: confirming a first pressure value according to the current evaporation pressure and a first set threshold, controlling an outer fan to operate at a first rotating speed according to the first pressure value, and confirming a second 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 rotating speed of the outer fan is greater than the preset rotating speed, wherein the second pressure value is greater than the first pressure value;
and the control module is also used for controlling the outer fan to operate at a second rotating speed according to the second pressure value.
Optionally, the computing module is further specifically configured to: and calculating the sum of the first pressure value and a second set threshold value to obtain the second pressure value.
Optionally, the obtaining module is further configured to: acquiring real-time indoor temperature after the outer fan runs at the first rotating speed for a preset time period;
and the calculation module is also used for determining the real-time evaporation pressure according to the real-time indoor temperature.
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, there is provided a computer storage medium storing 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.
The control method of the external fan of the air conditioning system at least comprises the following beneficial effects: determining the current evaporation pressure according to the current indoor temperature; and confirming a first pressure value according to the current evaporation pressure and a first set threshold value, controlling the outer fan to operate at a first rotating speed according to the first pressure value, determining the corresponding evaporation pressure according to the indoor temperature, and determining the rotating speed of the outer fan according to the evaporation pressure, so that the rotating speed of the outer fan can change along with the change of the current indoor temperature, and further the rotating speed of the compressor changes along with the change of the outer fan, the air-conditioning system operates at the matched working condition pressure, the energy consumption of the air-conditioning system can be reduced, and the energy-saving operation of the air-conditioning system is realized.
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 disclosure;
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 are 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. determining the current evaporation pressure according to the current indoor temperature;
102. 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.
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 specifically can be an air conditioning system of a frequency conversion 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.
When air conditioning system starts the back, evaporating pressure can dynamic change, and until air conditioning system operation after stable, evaporating pressure is fixed, can confirm current evaporating pressure through current indoor temperature (indoor return air temperature) in this application embodiment. Specifically, a temperature sensor may be provided in the air conditioning system to detect the current indoor temperature.
In the embodiment of the present application, different evaporation pressures Pe, that is, the corresponding relationship between the indoor temperature and the evaporation pressure, can be set according to the indoor temperature Tin. After the current indoor temperature Tin is determined, the corresponding current evaporating pressure Pe may be determined.
In an alternative embodiment, the step 101 includes:
confirming the indoor temperature range of the current indoor temperature;
and confirming that the evaporation pressure corresponding to the indoor temperature range in which the current indoor temperature is positioned is the current evaporation pressure according to the corresponding relation between the preset indoor temperature range and the evaporation pressure.
Specifically, the corresponding relation between the preset indoor temperature range and the evaporation pressure can be set as required, and different indoor temperature ranges correspond to different evaporation pressures. When the current evaporation pressure is obtained, the indoor temperature range where the current indoor temperature is located can be judged first, and then the corresponding evaporation pressure is confirmed according to the corresponding relation between the preset indoor temperature range and the evaporation pressure.
Through the temperature range that judges indoor temperature and locate, according to the corresponding relation of indoor temperature range and evaporating pressure, confirm the evaporating pressure of current indoor temperature range, and calculate first pressure value according to this evaporating pressure, because indoor temperature can follow the change of load and dynamic change, if come frequent definite evaporating pressure through dynamic change's indoor temperature value, and then calculate the rotational speed of first pressure value control outer fan, and the rotational speed of outer fan can influence the heat-sinking capability of condenser, and then can influence the rotational speed of compressor, promptly, when indoor temperature changes, outer fan, the operation of compressor is constantly changing, consequently can lead to air conditioning system's operation unstable. And through dividing the indoor temperature into different intervals, corresponding evaporating pressure to different intervals, even if the indoor temperature changes back and forth in a certain interval, the evaporating pressure is also certain, so the first pressure value calculated is also certain, and the rotating speed of the outer fan is also constant, thereby the air conditioning system can stably run.
Specifically, a plurality of groups of indoor temperature ranges and corresponding evaporation pressures can be set, which is not limited in the embodiment of the present application. For example, the correspondence relationship between the preset indoor temperature range and the evaporation pressure may be expressed as three groups:
indoor temperature range [ Ta, Tb ], corresponding evaporation pressure Pe 1;
room temperature range (Tb, Tc ], corresponding to an evaporation pressure Pe 2;
indoor temperature range (Tc, Td), corresponding to an evaporation pressure Pe 3;
for example, if the current indoor temperature Tin is in the indoor temperature range of (Tb, Tc ], it can be confirmed that the current evaporation pressure is Pe 2.
Further optionally, in the preset corresponding relationship between the indoor temperature range and the evaporation pressure, the indoor temperature range and the evaporation pressure are in positive correlation.
In the corresponding relation between the preset indoor temperature range and the evaporation pressure, the set indoor temperature range and the evaporation pressure can be in positive correlation, namely 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 rotating speed of the external fan to be increased, and the rotating 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.
After the current evaporation pressure is confirmed, a first pressure value, which is a pressure value for controlling the rotation speed of the outer fan, may be confirmed according to the current evaporation pressure and a first set threshold. The outer fan can thus be controlled to operate at a first speed of rotation as a function of a first pressure value, which process can be denoted as a first control phase.
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.
In an alternative embodiment, the step 102 includes:
21. 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.
In an optional embodiment, the method further comprises:
after the outer fan runs at the first rotating speed for a preset time period, acquiring real-time indoor temperature, and determining real-time evaporation pressure according to the real-time indoor temperature;
and confirming the first pressure value according to the real-time evaporation pressure and the first set threshold value.
Specifically, in the embodiment of the present application, the external fan control logic in step 101 and step 102 may be periodically executed, so as to implement real-time regulation and control of the external fan rotation speed. Through the steps 101 and 102, after the external fan is controlled to operate at the first rotation speed (set as w1) according to the confirmed first pressure value (set as P1), the real-time indoor temperature can be obtained again after the predetermined time period to determine the real-time evaporation pressure so as to update the first pressure value (set as P2), the rotation speed of the external fan corresponding to P2 is w2, that is, the external fan is controlled to operate at the new second rotation speed w2 through the new second pressure value P2, so that the real-time regulation of the rotation speed of the external fan is realized. That is, it can be understood that the system may be calibrated once every certain time period through the above steps, and an updated pressure value is obtained for controlling the rotation speed of the updated outer fan.
In an embodiment, a value range of the first set threshold a in the embodiment of the present application is 1 to 3 bar.
The pressure set value of the conventional variable frequency air conditioner for controlling the rotating speed of the outer fan is generally 18-21 bar, the outer fan is controlled through the existing larger pressure value of the outer fan, so that the rotating speed of the outer fan is lower, in the embodiment of the application, the rotating speed of the outer fan is controlled by determining the target pressure value which is relatively lower than the conventional set value through the calculation logic and the setting of the smaller first set threshold value A, so that the rotating speed of the outer fan is improved, the heat dissipation capacity of the condenser is increased, the condensation temperature is reduced, the compression ratio of the compressor is reduced due to the reduction of the condensation temperature, the rotating speed of the compressor is reduced, and the rotating speed of the compressor is in direct proportion to the power of the compressor, so that the power of the compressor is reduced after the rotating speed of the compressor is reduced, the energy efficiency of the whole machine is greatly improved, and the purpose of energy conservation is achieved.
In an optional embodiment, after confirming a first pressure value according to the current evaporation pressure and a first set threshold, and controlling the outer fan to operate at a first rotation speed according to the first pressure value, the method further includes:
03. acquiring the current outdoor temperature;
04. determining a second 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 second pressure value is greater than the first pressure value;
05. and controlling the outer fan to operate at a second rotating speed according to the second pressure value.
Specifically, an outdoor temperature sensor may be disposed in the air conditioning system to collect the outdoor temperature Tout. 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, namely, a new second pressure value can be confirmed to control the outer fan to operate at a second rotating speed.
On the basis of the foregoing embodiment, when it is detected that the current outdoor temperature Tout is within the preset temperature range (e.g. T1 ≦ Tout ≦ T2 is satisfied), and the current rotation speed of the outer fan is greater than the preset rotation speed (AA% rotation speed), a control logic different from that of the foregoing first control stage may be adopted, that is, a second pressure value is calculated, so as to control the outer fan to operate at a corresponding second rotation speed by the second pressure value. This process can be denoted as a second control phase.
Wherein the second pressure value may be obtained based on the first pressure value. The specific calculation method of the second pressure value may be set as needed, such as setting a parameter value (which may be a second set threshold value) set for calculating the second 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 a weight parameter to obtain a second pressure value that is relatively larger, and the like.
Optionally, the determining the 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 second pressure value.
Specifically, the sum of the first pressure value and the second set threshold value may be calculated as the target pressure value. If the first pressure value is Pc1 and the second set threshold value is N, the second 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 second 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.
After the step 102 is executed, the control of the external fan speed of the air conditioning system is carried out according to the first pressure value P1 equal to Pe + a; after that, the steps 03 to 05 may be executed, for example, the step 03 may be executed first, and if it is determined that the current outdoor temperature is within the preset temperature range and the rotation speed of the external fan is greater than the preset rotation speed, the step 04 and the step 05 are executed, and the second pressure value P2 is determined based on the first pressure value P1, that is, the rotation speed of the external fan of the air conditioning system is controlled according to P2 — P1+ N.
Because the power of the outer fan is in direct proportion to the 3 rd power of the rotating speed of the outer fan, the air volume lifting amplitude is smaller than the power lifting amplitude when the rotating speed of the outer fan is higher than a certain rotating speed, and at the moment, although the rotating speed of the compressor can be reduced by lifting the rotating speed of the outer fan, the reduction amplitude is not as large as the power increasing amplitude of the outer fan, so that the outer fan is controlled by adopting a higher pressure set value of the outer fan through the steps in the embodiment of the application under the condition, and the integral energy conservation is realized. 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 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 implementation, the method for controlling an external fan of an air conditioning system in an embodiment of the present application may include:
after the air conditioning system is started for a preset time t, the air pump mode is entered, and the external fan control logic of the first control stage in the embodiment of the application is executed:
detecting the current indoor temperature Tin, and calculating the current evaporation pressure Pe; wherein, here are provided:
when the indoor temperature Tin is less than or equal to Ta and less than or equal to Tb, the corresponding evaporation pressure is Pe 1;
when Tb is less than indoor temperature Tin and less than or equal to Tc, the corresponding evaporation pressure is Pe 2;
when Tc is more than the indoor temperature Tin and less than or equal to Td, the corresponding evaporation pressure is Pe 3;
the outer fan can be controlled according to the current evaporation pressure Pe and a first set threshold a, that is, a first pressure value Pc ═ (Pe + a) is set, so that the outer fan is controlled 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 Tout is within the preset temperature range (for example, T1 ≦ Tout ≦ T2 is satisfied), and the current outer fan rotation speed is greater than or equal to the preset rotation speed (AA% rotation speed), the outer fan control logic of the second control stage in the embodiment of the present application is executed:
calculating a second pressure value (Pc + N) so as to control the outer fan to operate at a second rotating speed corresponding to the second pressure value (Pc + N), wherein the rotating speed of the outer fan can be controlled to be less than BB% rotating speed; wherein BB% is less than AA%.
In the embodiment of the application, different logics are adopted under different temperature zones, and when Tout 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.
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 regulator 3, and an evaporator 4. The control unit is not marked here, and the control of the rotating speed of the external fan 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, 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.
In the variable frequency machine room air conditioning system in the embodiment of the application, by combining the control logic in the embodiment shown in fig. 1, the current evaporation pressure is determined according to the current indoor temperature, the first pressure value is determined according to the current evaporation pressure and the first set threshold, the outer fan is controlled to operate at the first rotating speed according to the first pressure value, different indoor temperatures correspond to different evaporation pressures, so that the rotating speed of the outer fan is reasonably controlled according to the evaporation pressure and the first set threshold, and the energy-saving operation of the air conditioning system can be realized by controlling the outer fan; and the current rotating speed of the outer fan and the outdoor temperature are monitored, so that the rotating speed of the outer fan is further reasonably regulated and controlled, the rotating speed of the outer fan is more suitable for different outdoor temperatures, the power consumption of an air conditioning system is reduced, and the stability of the system is improved.
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: determining the current evaporation pressure according to the current indoor temperature, determining 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:
detecting the current indoor temperature, such as 24 +/-2 ℃, and the evaporation pressure Pe1 is 9 bar; at this time, the value a may be 3, then the value Pc 1-Pe 1+ a-9 bar +3 bar-12 bar is calculated, and the external fan rotation speed is controlled by Pc 1-12 bar;
detecting the evaporation pressure Pe2 as 11.5bar when the current indoor temperature is 35 +/-2 ℃; at this time, the value a may be 3, then the value Pc 2-Pe 2+ a-11.5 bar +3 bar-14.5 bar is calculated, and the external fan rotation speed is controlled by Pc 2-14.5 bar;
the set value of the conventional variable frequency air conditioner is generally 18-21 bar, so that the rotating speed of an external fan is low; in the embodiment of the application, the rotating speed of the outer fan is controlled by determining a target pressure value which is relatively lower than a conventional set value through the calculation logic and setting a smaller first set threshold value A, so that the rotating speed of the outer fan is increased, and the rotating 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 T1 is more than or equal to Tout is more than or equal to T2, 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 rd power of the rotating speed; the outer fan control logic of the second control stage may be executed: in the temperature zone, the current rotating speed of the outer fan meets the rotating speed of more than or equal to AA percent, for example, the AA percent is 80 percent, and the rotating speed set point of the outer fan is adjusted to be (Pc + N). The pressure set value for controlling the rotating speed of the outer fan is properly increased through the second set threshold value N (the former increased value is understood to be A, and the latter increased value is understood to be 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.
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. 4, the air conditioning system external blower control device 400 includes:
a calculation module 410 for determining a current evaporating pressure according to a current indoor temperature;
the calculating module 410 is further configured to determine a first pressure value according to the current evaporation pressure and a first set threshold;
and the control module 420 is used for controlling the outer fan to operate at a first rotating speed according to the first pressure value.
Optionally, the calculating module 410 is specifically configured to:
confirming the indoor temperature range of the current indoor temperature;
and confirming that the evaporation pressure corresponding to the indoor temperature range in which the current indoor temperature is positioned is the current evaporation pressure according to the corresponding relation between the preset indoor temperature range and the evaporation pressure.
Optionally, the calculating module 410 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 system further includes an obtaining module 430, configured to obtain a current outdoor temperature;
the calculating module 410 is further configured to: confirming a first pressure value according to the current evaporation pressure and a first set threshold, controlling an outer fan to operate at a first rotating speed according to the first pressure value, and then confirming a second pressure value based on the first pressure value under the conditions that the current outdoor temperature is within a preset temperature range and the current rotating speed of the outer fan is greater than a preset rotating speed, wherein the second pressure value is greater than the first pressure value;
the control module 420 is further configured to control the outer fan to operate at a second rotation speed according to the second pressure value.
Optionally, the calculating module 410 is further specifically configured to: and calculating the sum of the first pressure value and a second set threshold value to obtain the second pressure value.
Optionally, the obtaining module 430 is further configured to: acquiring real-time indoor temperature after the outer fan runs at the first rotating speed for a preset time period;
the calculating module 410 is further configured to determine a real-time evaporating pressure according to the real-time indoor temperature.
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, an 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 to store 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. The computer storage medium provides a storage space that stores an operating system of the 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 perform 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 devices or modules through some interfaces, 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 via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. 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:
determining the current evaporation pressure according to the current indoor temperature;
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.
2. The method of claim 1, wherein determining the current evaporating pressure based on the current indoor temperature comprises:
confirming an indoor temperature range in which the current indoor temperature is;
and confirming that the evaporation pressure corresponding to the indoor temperature range where the current indoor temperature is located is the current evaporation pressure according to the corresponding relation between the preset indoor temperature range and the evaporation pressure.
3. The air conditioning system external fan control method according to claim 2, wherein in the preset correspondence relationship between the indoor temperature range and the evaporation pressure, the indoor temperature range is positively correlated with the evaporation pressure.
4. The method for controlling the external fan of the air conditioning system according to claim 1, wherein the determining a 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.
5. The method of claim 1, wherein after confirming a first pressure value according to the current evaporating pressure and a first set threshold, and controlling the outer fan to operate at a first rotation speed according to the first pressure value, the method further comprises:
acquiring the current outdoor temperature;
when the current outdoor temperature is within a preset temperature range and the current outer fan rotating speed is larger than a preset rotating speed, confirming a second pressure value based on the first pressure value, wherein the second pressure value is larger than the first pressure value;
and controlling the outer fan to operate at a second rotating speed according to the second pressure value.
6. The method of claim 5, wherein the identifying a second 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 second pressure value.
7. The method of claim 1, further comprising:
after the outer fan runs at the first rotating speed for a preset time period, acquiring real-time indoor temperature, and determining real-time evaporation pressure according to the real-time indoor temperature;
and confirming the first pressure value according to the real-time evaporation pressure and the first set threshold value.
8. An external fan control device of an air conditioning system, comprising:
the calculation module is used for determining the current evaporation pressure according to the current indoor temperature;
the calculation module is further used for confirming a first pressure value according to the current evaporation pressure and a first set threshold;
and the control module is used for controlling the outer fan to operate at a first rotating speed according to the first 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 one 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.
CN202210757747.6A 2022-06-30 2022-06-30 External fan control method and device of air conditioning system, electronic equipment and storage medium Pending CN115031354A (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210757747.6A CN115031354A (en) 2022-06-30 2022-06-30 External fan control method and device of air conditioning system, electronic equipment and storage medium

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CN115031354A true CN115031354A (en) 2022-09-09

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