CN115031343A - 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
CN115031343A
CN115031343A CN202210667774.4A CN202210667774A CN115031343A CN 115031343 A CN115031343 A CN 115031343A CN 202210667774 A CN202210667774 A CN 202210667774A CN 115031343 A CN115031343 A CN 115031343A
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pressure value
pressure
value
oscillation amplitude
target
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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 CN202210667774.4A priority Critical patent/CN115031343A/en
Publication of CN115031343A publication Critical patent/CN115031343A/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
    • F24F11/32—Responding to malfunctions or emergencies
    • 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
    • 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)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Fuzzy Systems (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (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: when the oscillation amplitude of the pressure value at the high pressure side of the system is detected to be larger than the preset amplitude, confirming a target pressure value according to the current evaporation pressure, a first set threshold value and the oscillation amplitude; and controlling the outer fan to operate at a target rotating speed according to the target pressure value, so that the probability that high pressure fluctuates periodically can be reduced, and the stability of the system is improved.

Description

External fan control method and device of air conditioning system, electronic equipment and storage medium
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a method and an apparatus for controlling an external fan of an air conditioning system, an electronic device, 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 modern society, but the power consumption of the data center is high.
In practical application, a machine room air conditioner often has working conditions of long piping and high drop, and under the working conditions, the pressure loss of a pipeline of a machine room air conditioning system is very large, and in the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: according to the existing control mode, the high voltage is controlled to periodically fluctuate, so that the output of the refrigerating capacity is unstable, and the stability of the whole system is influenced.
Therefore, a new control logic is needed to reduce the possibility of periodic fluctuation of high voltage and improve the system stability.
Disclosure of Invention
The application provides an air conditioning system external fan control method, device, electronic equipment and storage medium, and by adopting a new external fan control logic, the periodic fluctuation probability of the high-voltage side of the air conditioning system can be reduced, and the system stability is improved.
In a first aspect, a method for controlling an external fan of an air conditioning system is provided, which includes:
when the oscillation amplitude of the pressure value at the high pressure side of the system is detected to be larger than the preset amplitude, confirming a target pressure value according to the current evaporation pressure, a first set threshold value and the oscillation amplitude;
and controlling the outer fan to operate at a target rotating speed according to the target pressure value.
Optionally, before determining the target pressure value according to the current evaporation pressure, the first set threshold and the oscillation amplitude, the method further includes:
acquiring a maximum pressure value and a minimum pressure value of a high-pressure side of the system in a preset period;
and calculating the oscillation amplitude of the pressure value of the high-pressure side of the system according to the maximum pressure value and the minimum pressure value of the high-pressure side of the system in the preset period.
Optionally, the determining a target pressure value according to the current evaporation pressure, the first set threshold and the oscillation amplitude includes:
and calculating the sum of the current evaporation pressure, the first set threshold and one half of the oscillation amplitude to obtain the target pressure value.
Optionally, before detecting that the oscillation amplitude of the pressure value on the high pressure side of the system is greater than the preset amplitude, the method further includes:
and confirming a first pressure value according to the current evaporation pressure and the first set threshold value, and controlling the outer fan to operate at a first target rotating speed according to the first pressure value.
Optionally, the determining a first pressure value according to the current evaporation pressure and the 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 method further includes:
acquiring outdoor temperature;
when the outdoor temperature is within a preset temperature range and the rotating speed of the outer fan is greater than a preset rotating speed, confirming a second pressure value based on the first pressure value, wherein the second pressure value is greater than the first pressure value;
and controlling the outer fan to operate at a second target rotating speed according to the second pressure value.
Optionally, the method further includes:
after the outer fan runs at the target rotating speed for a preset time period, acquiring the real-time oscillation amplitude of the pressure value of the high-pressure side of the system;
when the oscillation amplitude of the real-time system high-pressure side pressure value is detected to be larger than the preset amplitude, triggering the step of confirming a target pressure value according to the current evaporation pressure, the first set threshold and the oscillation amplitude;
and triggering the step of confirming a first pressure value according to the current evaporation pressure and the first set threshold when the oscillation amplitude of the real-time system high-pressure side pressure value is not larger than the preset amplitude.
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 the current evaporation pressure, a first set threshold value and the oscillation amplitude when the oscillation amplitude of the pressure value at the high pressure side of the system is detected to be larger than the preset amplitude;
and the control module is used for controlling the outer fan to operate at a target rotating speed according to the target pressure value.
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.
According to the control method of the external fan of the air conditioning system, when the oscillation amplitude of the pressure value on the high-pressure side of the system is detected to be larger than the preset amplitude, the target pressure value is confirmed according to the current evaporation pressure, the first set threshold value and the oscillation amplitude; the outer fan is controlled to operate at the target rotating speed according to the target pressure value, the target pressure value for controlling the rotating speed of the outer fan is adjusted by monitoring the oscillation amplitude of the high-pressure side pressure, the rotating speed of the outer fan is controlled according to the target pressure value, and the oscillation amplitude of the high-pressure side pressure value of the system is considered when the target pressure value is calculated, so that the probability that the high pressure fluctuates periodically can be reduced when the rotating speed of the outer fan is controlled according to the target value, and the stability of the system is improved.
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 structural diagram of an air conditioning system of an inverter room according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an air conditioning system of a long-tubing 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, 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 foregoing drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. 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. when the oscillation amplitude of the pressure value at the high pressure side of the system is detected to be larger than the preset amplitude, confirming a target pressure value according to the current evaporation pressure, a first set threshold value and the oscillation amplitude;
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 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.
The outlet side of the compressor of the air conditioning system is generally referred to as a high pressure side, because the refrigerant is compressed by the compressor to be high-temperature and high-pressure gas, and then the refrigerant is changed into high-pressure and low-temperature liquid after reaching the condenser, and the refrigerant is reduced into low-temperature and low-pressure liquid through the throttling element, and then the refrigerant is evaporated into low-temperature and low-pressure gas through the evaporator to form a cycle. Optionally, the pressure value on the high-pressure side of the system in the embodiment of the present application may be acquired by a sensor at an outlet of the condenser.
The high pressure side of the air conditioning system tends to fluctuate periodically. The oscillation amplitude of the pressure value on the high-pressure side of the system can be understood as periodically fluctuating amplitude, namely the pressure fluctuation on the high-pressure side of the system in a certain period is referred to as the difference value between the highest value and the lowest value of the pressure.
In an optional embodiment, before confirming the target pressure value according to the current evaporating pressure, the first set threshold value and the oscillation amplitude, the method further comprises:
acquiring a maximum pressure value and a minimum pressure value of the high-pressure side of the system in a preset period;
and calculating the oscillation amplitude of the pressure value of the high-pressure side of the system according to the maximum pressure value and the minimum pressure value of the high-pressure side of the system in the preset period.
The pressure value of the high-pressure side of the system can be changed in real time, the preset period can be set according to needs, the pressure value of the high-pressure side of the system is monitored, the maximum pressure value and the minimum pressure value of the high-pressure side of the system in the duration of the preset period are obtained, the difference value between the maximum pressure value and the minimum pressure value is calculated, and the oscillation amplitude of the corresponding pressure value of the high-pressure side of the system is obtained.
Further, when the oscillation amplitude of the pressure value on the high pressure side of the system is detected to be larger than the preset amplitude, the target pressure value can be confirmed according to the current evaporation pressure, the first set threshold value and the oscillation amplitude, and the target pressure value is used for controlling the rotating speed of the external fan.
The first set threshold is a parameter value set for calculating a target 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 demand, which is not limited in the embodiment of the present application.
Alternatively, 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 optional embodiment, the determining the target pressure value according to the current evaporation pressure, the first set threshold and the oscillation amplitude includes:
and calculating the sum of the current evaporation pressure, the first set threshold and one half of the oscillation amplitude to obtain the target pressure value.
Specifically, the sum of the current evaporation pressure Pe, the first set threshold a and one-half of the oscillation amplitude X may be calculated to obtain a target pressure value Pc, so as to control the rotation speed of the external fan by using the target pressure value Pc, where the rotation speed of the external fan corresponding to the target pressure value Pc is the target rotation speed R. I.e. can be understood as: and setting Pc to Pe + A + X/2, so as to control the outer fan to operate at the target rotating speed R corresponding to Pc.
Optionally, the weight parameter of the oscillation amplitude may be set according to needs, for example, 1/3, that is, Pc ═ Pe + a + X/3 is set, and the influence of a and the oscillation amplitude may also be introduced by using other calculation methods, which is not limited in this embodiment of the application.
Before the oscillation amplitude of the pressure value on the high-pressure side of the system is monitored to confirm the target pressure value, an external fan of the air conditioning system can be controlled according to any control method, and the method is not limited in the embodiment of the application.
Optionally, before detecting that the oscillation amplitude of the pressure value on the high pressure side of the system is greater than the preset amplitude, the method further includes:
100. and confirming a first pressure value according to the current evaporation pressure and the first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value.
Further optionally, the determining a first pressure value according to the current evaporation pressure and the 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.
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. That is to say, it can be understood that: 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 100 is executed, the external fan control of the air conditioning system is performed according to Pc ═ Pe + a; and then, step 101 and step 102 may be executed, that is, when it is detected that the oscillation amplitude of the pressure value on the high pressure side of the system is greater than the preset amplitude, the target pressure value may be determined according to the current evaporation pressure, the first set threshold value and the oscillation amplitude, and the outer fan may be controlled to operate at the target rotation speed according to the target pressure value.
In an optional embodiment, the method further comprises:
after the outer fan runs at the target rotating speed for a preset time period, acquiring the real-time oscillation amplitude of the pressure value of the high-pressure side of the system;
triggering the step of confirming a target pressure value according to the current evaporation pressure, the first set threshold and the oscillation amplitude when detecting that the oscillation amplitude of the real-time system high-pressure side pressure value is larger than the preset amplitude;
and triggering the step of confirming a first pressure value according to the current evaporation pressure and the first set threshold when the oscillation amplitude of the real-time system high-pressure side pressure value is not larger than the preset amplitude.
Specifically, in the embodiment of the present application, the external fan control logic of step 101 and step 102 may be periodically executed. After confirming the target pressure value (set as P1) according to the oscillation amplitude X1 through the steps 101 and 102, controlling the outer fan to operate at the target rotating speed (set as R1) through the target pressure value P1; after a preset time period, the oscillation amplitude X2 of the real-time system high-pressure side pressure value is obtained again to update the target pressure value (set as P2), the rotating speed of the outer fan corresponding to P2 is R2, namely the outer fan is controlled to operate at the new target rotating speed R2 through the new target pressure value P2, and the rotating speed of the outer fan is regulated and controlled in real time.
The judgment of the oscillation amplitude of the system high-pressure side pressure value may also be performed periodically, and when it is detected that the oscillation amplitude of the system high-pressure side pressure value is not greater than the preset amplitude, step 101 and step 102 may not be performed, and other external fan control logic may be performed, such as step 100: and confirming a first pressure value through the front 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 an optional embodiment, the method further comprises:
103. acquiring outdoor temperature;
when the outdoor temperature is within a preset temperature range and the rotating speed of the outer fan is greater than a preset rotating speed, determining a second pressure value based on the first pressure value, wherein the second pressure value is greater than the first pressure value;
104. and controlling the outer fan to operate at a second target rotating speed according to the second pressure value.
Wherein, step 100 may be executed first: and confirming the first pressure value according to the current evaporation pressure and the first set threshold, and then executing step 103, or executing step 103 first, and under the condition that the outdoor temperature is within the preset temperature range and the rotating speed of the outer fan is larger than the preset rotating speed, then executing the step of confirming the first pressure value, and further confirming the second pressure value based on the first pressure value.
Specifically, an outdoor temperature sensor may be provided in the air conditioning system to collect the outdoor temperature. On the basis of the foregoing embodiment, when it is detected that the outdoor temperature T is within the preset temperature range (e.g., T1 is greater than or equal to T2), and the current rotation speed of the outer fan is greater than the preset rotation speed (AA% rotation speed), different control logics may be employed, 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; alternatively, in addition to this, the processing flow in the embodiment shown in fig. 1 may be executed.
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) 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.
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 second pressure value.
Specifically, the sum of the first target pressure and the second set threshold may be calculated as the second target pressure. Assuming that the first target pressure is Pc1 and the second set threshold is N, the second target pressure 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.
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, the sensors 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.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an inverter room air conditioning system according to an embodiment of the present application, and as shown in fig. 2, the inverter room air conditioning system 200 includes:
compressor 1, condenser 2, flow regulator 3, evaporimeter 4, pressure sensor 5, wherein:
an outlet (exhaust port) of the compressor 1 communicates with an inlet of the condenser 2, an outlet of the condenser 2 communicates with an inlet of the flow rate adjusting device 3, an outlet of the flow rate adjusting device 3 communicates with an inlet of the evaporator 4, and an outlet of the evaporator 4 communicates with an inlet (suction port) of the compressor 1;
the pressure sensor 5 may be disposed at an outlet of the condenser 2, and is configured to collect an outlet pressure of the condenser 2, which may represent a pressure value of a high-pressure side of the system. Optionally, other sensors may be provided as required to collect pressure or temperature data.
Based on the inverter room air conditioning system 200, the method in the embodiment shown in fig. 1 may be performed, which is not described herein again; correspondingly, the air conditioning system 200 of the inverter machine room further includes an external fan, which can be controlled by the control method of the external fan of the air conditioning system in the embodiment shown in fig. 1.
Optionally, the inverter room air conditioning system 200 may further include a control unit, where the control unit may communicate with the pressure sensor 5 in a wired or wireless connection manner, or may communicate with other units (such as the compressor 1 and the condenser 2), and the control unit is not labeled in fig. 2. The control unit may be any type of controller or processor, and may acquire information of other units and perform data processing and system control, including performing any steps of the method in the embodiment shown in fig. 1.
Optionally, the compressor in the embodiment of the present application may be an inverter compressor, for example, a rotor compressor, a scroll compressor, a screw compressor, or a centrifugal compressor, and the embodiment of the present application does not limit this.
In an alternative embodiment, the outlet of the compressor 1 is connected to the inlet of the condenser 2 through a connecting gas pipe, and the outlet of the condenser 2 is connected to the inlet of the flow rate adjusting device 3 through a connecting liquid pipe.
Specifically, a schematic structural diagram of an inverter room air conditioning system with a long pipe shown in fig. 3 can be seen, where the inverter room air conditioning system includes:
the air conditioner comprises a compressor 1, a condenser 2, a flow regulating device 3, an evaporator 4, a pressure sensor 5, a connecting air pipe 6 and a connecting liquid pipe 7. 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.
An air outlet of the compressor 1 is communicated with an inlet of the condenser 2 through a long connecting air pipe 6, an outlet of the condenser 2 is communicated with an inlet of the flow regulating device 3 through a long connecting liquid pipe 7, an outlet of the flow regulating device 3 is communicated with an inlet of the evaporator 4, and an outlet of the evaporator 4 is communicated with an air suction port of the compressor 1; a pressure sensor 5 is arranged at the outlet of the condenser 2, and can be used for acquiring the outlet pressure of the condenser 2 and representing the pressure value of the high-pressure side of the system.
Optionally, the system may further include a pressure sensor at the compressor suction. 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 air conditioning system of the inverter room 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 air conditioning system of the inverter room in the embodiment of the application, by monitoring the oscillation amplitude of the high-pressure side pressure and adjusting the target pressure value for controlling the rotating speed of the outer fan in combination with the control logic in the embodiment shown in fig. 1, the probability that the high pressure is in periodic fluctuation can be reduced, and the stability of the system can be improved.
For example, when the air conditioner is started, a start time t is generally required, the time t is generally 3min, the rotation speeds of the external fan and the internal fan 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 rotation speed, a first external fan control logic 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; assume 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. However, due to the long-piping high-drop system, the pipeline pressure loss of the machine room air conditioning system is very large under the working condition, the high pressure of the system periodically fluctuates when the control is carried out at 12bar, so that the height difference fluctuates at 11-14 bar, and the oscillation amplitude X is 3 bar; then the control scheme may be modified at this point to implement a second external fan control logic: when the oscillation amplitude of the pressure value at the high pressure side of the system is detected to be larger than the preset amplitude, confirming a target pressure value according to the current evaporation pressure, a first set threshold value and the oscillation amplitude; controlling the outer fan to operate at a target rotating speed according to the target pressure value; the method specifically comprises the following steps: pc2 is controlled by Pe1+ a + X/2 by 9bar +3bar +1.5bar by 13.5bar, and the computational control logic checks every Δ t, Δ t being 1 min;
the above data are only examples, and each parameter and calculation formula may be adjusted or a threshold may be set according to actual situations, which is not limited in the embodiment of the present application.
In an optional embodiment, a value range of the second set threshold N is 1 to 2 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, so that the rotating speed of the outer fan is low; in the embodiment of the application, through the calculation logic and the setting of the smaller first set threshold value A, the target pressure value which is relatively lower than the conventional set value is determined to control the rotating speed of the outer fan, 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 energy-saving purpose is achieved.
In addition, under the condition that the high pressure of the system is subjected to periodic oscillation and the oscillation amplitude exceeds the preset amplitude, the target pressure value for controlling the outer fan can be adaptively adjusted according to the oscillation amplitude, the target pressure value is increased, the outer fan is controlled to operate at the target rotating speed, so that the periodic fluctuation of the high pressure is relatively reduced, and the stability of the system is improved.
In a certain temperature zone, when T is more than or equal to T1 and less than or equal to T2, generally between 5 ℃ and 20 ℃, the power of the rotating speed of the external fan is increased 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; by the method in the embodiment shown in fig. 2, in the temperature region and the current outer fan speed satisfies > AA% speed, for example, AA% is 80%, the outer fan speed set point is adjusted to (Pc + N), and compared to the control logic in the embodiment shown in fig. 1, the pressure set value for controlling the outer fan speed is increased by the second set threshold N (it can be understood that the former is increased by a value a, and the latter is increased by a value a + N), in this case, the outer fan can be controlled by adopting the outer fan pressure set value which is relatively higher, and further, the outer fan speed and the power are reduced appropriately, so as to achieve overall energy saving.
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:
the calculation module 410 is configured to, when it is detected that the oscillation amplitude of the pressure value on the high pressure side of the system is greater than a preset amplitude, determine a target pressure value according to the current evaporation pressure, a first set threshold value, and the oscillation amplitude;
and the control module 420 is used for controlling the outer fan to operate at a target rotating speed according to the target pressure value.
Optionally, the external blower control device 400 of the air conditioning system further includes an obtaining module 430, configured to obtain a maximum pressure value and a minimum pressure value of the high-pressure side of the system in a preset period;
the calculating module 410 is further configured to calculate and obtain an oscillation amplitude of the pressure value on the high pressure side of the system according to the maximum pressure value and the minimum pressure value on the high pressure side of the system in the preset period.
Optionally, the calculating module 410 is specifically configured to:
and calculating the sum of the current evaporation pressure, the first set threshold and one half of the oscillation amplitude to obtain the target pressure value.
Optionally, the calculating module 410 is further configured to determine a first pressure value according to the current evaporation pressure and the 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 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 obtaining module 430 is further configured to obtain an outdoor temperature;
the calculating module 410 is further configured to determine a second pressure value based on the first pressure value when the outdoor temperature is within a preset temperature range and the rotation speed of the outer fan is greater than a preset rotation speed, where 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 obtaining module 430 is further configured to obtain an oscillation amplitude of a real-time system high-pressure side pressure value after the external air blower operates at the target rotation speed for a predetermined time period;
the calculating module 410 is further configured to:
triggering the step of confirming a target pressure value according to the current evaporation pressure, a first set threshold value and the oscillation amplitude when the oscillation amplitude of the real-time system high-pressure side pressure value is detected to be larger than the preset amplitude;
and triggering the step of confirming the first pressure value according to the current evaporation pressure and the first set threshold when detecting that the oscillation amplitude of the real-time system high-pressure side pressure value is not larger than the preset amplitude.
According to an embodiment of the present application, the air conditioner external fan control device 400 may perform the steps in the method embodiment shown in fig. 1, 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 for storing a computer program comprising program instructions, and the processor 501 for executing 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 the embodiments of the present application may be configured to perform a series of processes, including the steps involved in the method shown in fig. 1.
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, 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:
when the oscillation amplitude of the pressure value at the high pressure side of the system is detected to be larger than the preset amplitude, confirming a target pressure value according to the current evaporation pressure, a first set threshold value and the oscillation amplitude;
and controlling the outer fan to operate at a target rotating speed according to the target pressure value.
2. The air conditioning system external fan control method according to claim 1, wherein before confirming a target pressure value in accordance with a current evaporating pressure, a first set threshold value, and the oscillation amplitude, the method further comprises:
acquiring a maximum pressure value and a minimum pressure value of a high-pressure side of the system in a preset period;
and calculating the oscillation amplitude of the pressure value of the high-pressure side of the system according to the maximum pressure value and the minimum pressure value of the high-pressure side of the system in the preset period.
3. The method of claim 1, wherein the identifying a target pressure value according to the current evaporating pressure, the first set threshold and the oscillation amplitude comprises:
and calculating the sum of the current evaporation pressure, the first set threshold and one half of the oscillation amplitude to obtain the target pressure value.
4. The air conditioning system external fan control method according to claim 1, wherein before detecting that the oscillation amplitude of the system high pressure side pressure value is larger than a preset amplitude, the method further comprises:
and confirming a first pressure value according to the current evaporation pressure and the first set threshold value, and controlling the outer fan to operate at a first rotating speed according to the first pressure value.
5. The air conditioning system external fan control method according to claim 4, wherein the confirming a first pressure value according to the current evaporation pressure and the first set threshold comprises:
and calculating the sum of the current evaporation pressure and the first set threshold value to obtain the first pressure value.
6. The air conditioning system external fan control method according to claim 4, further comprising:
acquiring outdoor temperature;
when the outdoor temperature is within a preset temperature range and the rotating speed of the outer fan is greater than a preset rotating speed, confirming a second pressure value based on the first pressure value, wherein the second pressure value is greater than the first pressure value;
and controlling the outer fan to operate at a second rotating speed according to the second pressure value.
7. The method of claim 1, further comprising:
after the outer fan runs at the target rotating speed for a preset time period, acquiring the real-time oscillation amplitude of the pressure value of the high-pressure side of the system;
when the oscillation amplitude of the real-time system high-pressure side pressure value is detected to be larger than the preset amplitude, triggering the step of confirming a target pressure value according to the current evaporation pressure, a first set threshold value and the oscillation amplitude;
and triggering the step of confirming a first pressure value according to the current evaporation pressure and the first set threshold when the oscillation amplitude of the real-time system high-pressure side pressure value is not larger than the preset amplitude.
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 the current evaporation pressure, a first set threshold value and the oscillation amplitude when the oscillation amplitude of the pressure value at the high pressure side of the system is detected to be larger than the preset amplitude;
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.
CN202210667774.4A 2022-06-14 2022-06-14 External fan control method and device of air conditioning system, electronic equipment and storage medium Pending CN115031343A (en)

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CN202210667774.4A CN115031343A (en) 2022-06-14 2022-06-14 External fan control method and device of air conditioning system, electronic equipment and storage medium

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Application Number Priority Date Filing Date Title
CN202210667774.4A CN115031343A (en) 2022-06-14 2022-06-14 External fan control method and device of air conditioning system, electronic equipment and storage medium

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