CN115076919A - External fan control method and device of air conditioning system, electronic equipment and storage medium - Google Patents
External fan control method and device of air conditioning system, electronic equipment and storage medium Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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: calculating a pressure difference value according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device; and confirming a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold value, controlling the rotating speed of the outer fan according to the target pressure value, and realizing the energy-saving operation of the air conditioning system through controlling the outer fan.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an external fan control method and device of an air conditioning system, electronic equipment and a storage medium.
Background
With the promotion and promotion of a series of informatization projects such as ' internet + ' big data application ', the scale and the quantity of data centers are rapidly developed and become power utilization consumers of an information society. The data center provides great convenience for the development of the modern society, but the power consumption of the data center is high.
The working condition of long piping, high drop often appears in the computer lab air conditioner in the in-service use, and the pipeline pressure loss of computer lab air conditioning system can be very big under this kind of working condition, and the compressor consumption also can increase along with the increase of piping length simultaneously, can lead to the whole consumption of computer lab air conditioner to increase by a wide margin like this, and is not energy-conserving enough.
The power consumption of the air conditioning system is mainly determined by an external fan and a compressor, and in the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: the whole power consumption cannot be well reduced by the existing control logic for realizing energy conservation by controlling the external fan.
Therefore, a new external fan control logic is needed to reduce the power consumption of the air conditioning system.
Disclosure of Invention
The application provides an air conditioning system external fan control method, device, electronic equipment and storage medium, and can provide a new external fan control logic, so that the power consumption of the air conditioning system can be reduced.
In a first aspect, a method for controlling an external fan of an air conditioning system is provided, which includes:
calculating a pressure difference value according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device;
and confirming a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold value, and controlling the rotating speed of the outer fan according to the target pressure value.
Optionally, the determining a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold includes:
calculating the sum of the pressure difference value, the current evaporation pressure and the first set threshold value to obtain the first target pressure value;
and controlling the outer fan to operate at a first target rotating speed through the first target pressure value.
Optionally, the method further includes:
and after the system is started and operates for a preset time and the compressor reaches a rated rotating speed, acquiring the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulating device and the first set threshold.
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 target pressure value based on the first target pressure value;
and controlling the outer fan to operate at a second target rotating speed according to the second target pressure value.
Optionally, said identifying a second target pressure value based on said first target pressure value comprises,
and calculating the sum of the first target pressure value and a second set threshold value to obtain a second target pressure value.
Optionally, the method further includes:
acquiring real-time evaporation pressure and a pressure difference value after the external fan operates at the first target rotating speed for a preset time period;
and confirming the first target pressure value according to the real-time evaporation pressure and the pressure difference value and the first set threshold value.
Optionally, the obtaining the current evaporation pressure includes:
determining the current evaporation pressure according to the indoor return air temperature, or detecting the current evaporation pressure according to a pressure sensor;
the acquiring a first set threshold includes: the first set threshold is determined based on a compression ratio of the compressor, a pressure differential, and a system pressure differential demand.
In a second aspect, an external blower control device for an air conditioning system is provided, including:
the calculating module is used for calculating a pressure difference value according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device;
and the control module is used for confirming a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold value, and controlling the rotating speed of the outer fan 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, a pressure difference value is calculated according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device; confirming a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold value, and controlling the rotating speed of the outer fan according to the target pressure value; the target pressure value obtained by the scheme is relatively lower than the set value of the conventional variable frequency air conditioner, the rotating speed of the outer fan can be controlled to be increased, the rotating speed of the compressor can be reduced due to the increase of the rotating speed of the outer fan, the energy efficiency of the whole machine can be improved, and the purpose of saving energy is achieved.
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 air conditioning system of a long-piping inverter room according to an embodiment of the present application;
fig. 5 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. 6 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 non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The embodiments of the present application will be described below with reference to the drawings.
Referring to fig. 1, fig. 1 is a schematic flow chart of an external fan control method of an air conditioning system according to an embodiment of the present application, and as shown in fig. 1, the method includes:
101. a pressure differential is calculated based on the outlet pressure of the compressor and the inlet pressure of the flow regulating device.
The method for controlling the external fan of the air conditioning system in the embodiment of the application can be applied to the air conditioning system, and particularly can be an air conditioning system of a variable frequency machine room. The air conditioning system of the inverter machine room can comprise common components such as a compressor, a flow regulating device, an outer 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.
Specifically, the pressure difference (Pa-Pb) may be obtained by setting sensors at corresponding positions to collect the inlet pressure (suction port pressure) Pb of the flow rate adjusting device and the outlet pressure (discharge port pressure) Pa of the compressor, and calculating the difference between the outlet pressure Pa of the compressor and the inlet pressure Pb of the flow rate adjusting device.
102. And confirming a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold value, and controlling the rotating speed of the outer fan according to the target pressure value.
In the embodiment of the application, the current evaporation pressure of the air conditioning system and the first set threshold value can be further obtained, the target pressure value is confirmed according to the pressure difference value, the current evaporation pressure and the first set threshold value, and the rotating speed of an outer fan of the air conditioning system is controlled through the target pressure value. The first set threshold is a parameter value set for calculating the target pressure value, and may be set as needed, which is not limited in the embodiment of the present application.
In an alternative embodiment, the step 102 includes:
calculating the sum of the pressure difference, the current evaporation pressure and the first set threshold value to obtain a first target pressure value;
and controlling the outer fan to operate at a first target rotating speed through the first target pressure value.
Specifically, the sum of the current evaporation pressure Pe, the pressure difference (Pa-Pb), and the first set threshold value a may be calculated to obtain a first target pressure value Pc, so that the rotation speed of the external fan may be controlled by the first target pressure value Pc, and the rotation speed of the external fan corresponding to the first target pressure value Pc is the first target rotation speed. I.e. can be understood as: and setting the Pc-Pe + (Pa-Pb) + A value, so as to control the outer fan to operate at a first target rotating speed corresponding to the Pc.
In an alternative embodiment, the obtaining the current evaporating pressure includes:
determining the current evaporating pressure according to the indoor return air temperature, or detecting the current evaporating pressure according to a pressure sensor;
the acquiring the first set threshold includes: the first set threshold is determined based on a compression ratio of the compressor, a pressure differential, and a system pressure differential demand.
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.
The first set threshold is a parameter value set for calculating the target pressure value, and may be set in advance as needed, specifically determined based on the compression ratio of the compressor, the pressure difference, and the system pressure difference requirement.
In an optional embodiment, the method further comprises:
and after the system is started and operates for a preset time and the compressor reaches a rated rotating speed, acquiring the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulating device and the first set threshold.
Specifically, when the air conditioner is started, starting time t is generally needed for a period of time t, the time t is generally 3min, and the rotating speed of the fan is regulated and controlled according to a set value X within the starting time; after the system is started, the operation time length reaches a preset time length (the preset time length is t here), and after the rotation speed of the compressor reaches the rated rotation speed, the above steps 101 and 102 may be executed, so as to implement the external fan control logic, which is not described herein again. The preset duration and the rated rotating speed can be set according to requirements.
Further optionally, the method further includes:
after the outer fan runs for a preset time period at the first target rotating speed, acquiring real-time evaporation pressure and a pressure difference value;
and confirming the first target pressure value according to the real-time evaporation pressure and the pressure difference value and the first set threshold value.
Specifically, in the embodiment of the present application, the external fan control logic of step 101 and step 102 may be periodically executed. Through the above steps 101 and 102, after the outer fan is controlled to operate at the first target rotation speed (set as w1) according to the confirmed first target pressure value (set as P1), the real-time outlet pressure of the compressor, the inlet pressure of the flow rate adjusting device and the current evaporation pressure may be obtained again after a predetermined time period to update the first target pressure value (set as P2), and the rotation speed of the outer fan corresponding to P2 is w2, that is, the outer fan is controlled to operate at the new target rotation speed w2 by the new target pressure value P2, so that the real-time regulation of the rotation speed of the outer fan is realized.
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, so that the rotating speed of the outer fan is low, and 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 the conventional set value through the calculation logic and the setting of the first set threshold value A, so that the rotating speed of the outer fan is improved, the rotating speed of the compressor is reduced, the energy efficiency of the whole machine is greatly improved, and the purpose of saving energy is achieved.
Referring to fig. 2, fig. 2 is a schematic flow chart of another method for controlling an external fan of an air conditioning system according to an embodiment of the present application, and as shown in fig. 2, the method includes:
201. calculating a pressure difference value according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device;
202. calculating the sum of the pressure difference, the current evaporation pressure and the first set threshold to obtain a first target pressure value;
203. acquiring outdoor temperature;
204. 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 target pressure value based on the first target pressure value;
205. and controlling the outer fan to operate at a second target rotating speed according to the second target pressure.
Step 201 and step 202 may refer to the detailed descriptions in step 101 and step 102 in the embodiment shown in fig. 1, respectively, and are not described herein again; the steps 201 to 203 may be performed out of sequence, for example, the step 203 may be performed first, and the step 201 and the step 202 are performed again to determine the first target pressure when the outdoor temperature is within the preset temperature range and the rotation speed of the outer fan is greater than the preset rotation speed, and then the second target pressure value is determined based on the first target 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 ≦ T2 is satisfied), and the current rotation speed of the outer fan is greater than the preset rotation speed (AA% rotation speed), different control logics may be adopted, that is, a second target pressure value is calculated, so as to control the outer fan to operate at a corresponding second target rotation speed through the second target pressure value; alternatively, in addition to this, the processing flow in the embodiment shown in fig. 1 may be executed.
Wherein the second target pressure value may be obtained on the basis of the first target pressure value. The specific calculation method of the second target 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 target pressure value. Optionally, a specific value may be increased or decreased on the basis of the first target pressure value, or the first target pressure value may be adjusted by using a weight parameter to obtain a second target pressure value, and the like, which is not limited in the embodiment of the present application.
In an alternative embodiment, the identifying a second target pressure value based on the first target pressure value includes,
and calculating the sum of the first target pressure value and a second set threshold value to obtain the second target pressure value.
Specifically, the sum of the first target pressure value and the second set threshold value may be calculated as the second target pressure value. If the first target pressure value is Pc and the second set threshold value is N, the second target pressure value is (Pc + 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. In some embodiments, the preset rotation speed may be set to 80%, since the power of the external fan is in direct proportion to the 3 rd power of the rotation speed of the external fan, when the rotation speed of the external fan is higher than a certain rotation speed, the air volume increase amplitude is smaller than the power increase amplitude, and at this time, although the rotation speed of the external fan is increased to reduce the rotation speed of the compressor, the decrease amplitude is not as great as the power increase amplitude of the external fan, so in this case, in the embodiment of the present application, the external fan is controlled by adopting a higher pressure setting value of the external fan through the above steps, and overall energy saving is achieved. Specifically, the variable frequency machine room air conditioning system in the embodiment of the application can adopt different logics under different temperature zones, and when T is more than or equal to T1 and less than or equal to T2, the target pressure value for controlling the outer fan can be further increased to control the reduction of the rotating speed and the power of the outer fan, so that the overall energy conservation is realized.
In the embodiment of the application, the sensors in the system can be adjusted or added according to the needs to realize the required data acquisition and monitoring, so as to provide reasonable control for the system or the control unit, and the method is not limited herein.
Referring to fig. 3, fig. 3 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. 3, the inverter room air conditioning system 300 includes:
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 first pressure sensor 5-c is provided at an inlet of the compressor 1 to collect an inlet pressure of the compressor 1, the second pressure sensor 5-a is provided at an outlet of the compressor 1 to collect an outlet pressure of the compressor 1, and the third pressure sensor 5-b is provided at an inlet of the flow rate adjusting device 3 to collect an inlet pressure of the flow rate adjusting device 3.
Based on the inverter room air conditioning system 300, the method in the embodiment shown in fig. 1 may be performed, and details are not repeated here. Correspondingly, the inverter room air conditioning system 300 further includes an external fan, which can be controlled by the external fan control method of the air conditioning system in the embodiment shown in fig. 1 or fig. 2.
Optionally, the inverter room air conditioning system 300 may further include a control unit, where the control unit may communicate with each pressure sensor through a wired connection or a wireless connection, and may also communicate with other units (such as the compressor 1 and the condenser 2), and the control unit is not labeled in fig. 3. 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 methods in the embodiments shown in fig. 1 or fig. 2.
In the embodiment of the application, the pressure sensors can be respectively arranged in front of the exhaust pipe and the flow adjusting device of the compressor and on the air suction pipe of the compressor, and the unit is connected into a closed loop to collect pressure values at each position.
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. 4 can be seen, where the inverter room air conditioning system includes:
the device comprises a compressor 1, a condenser 2, a flow regulating device 3, an evaporator 4, pressure sensors 5 (comprising a second pressure sensor 5-a, a third pressure sensor 5-b and a first pressure sensor 5-c), a connecting gas 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-a is arranged at the outlet of the compressor 1 and can be used for detecting the outlet pressure Pa of the compressor, a pressure sensor 5-b is arranged at the inlet of the flow regulator 3 and can be used for detecting the inlet pressure Pb of the flow regulator, and a pressure sensor 5-c is arranged at the inlet of the compressor 1 and can be used for detecting the evaporating pressure Pe.
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 inverter room air conditioning system in the embodiment of the application, in combination with the control logic in the embodiment shown in fig. 1 or fig. 2, the rotating speed set point of the external fan can be set according to the current evaporation pressure and the safety range of the compressor, and compared with the conventional method, a lower target pressure value can be set to control the rotating speed of the external fan to be higher, so that the rotating speed of the compressor is reduced, the refrigeration mode of the compressor running under the high-temperature working condition and the air pump heat pipe mode of the compressor running under the low-temperature working condition are realized, and therefore, energy conservation is realized.
For example, when the air conditioner is started, a period of starting time t is generally needed, the time t is generally 3min, and the rotating speed of the internal and external fans can be regulated and controlled according to a set value X during the starting time; after the system is started and the compressor reaches the rated speed, the external fan control logic in the embodiment of the present application may be executed, for example: detecting the current indoor return air temperature, if the indoor return air temperature is 24 +/-2 ℃, the evaporating pressure Pe1 is 9bar, meanwhile, the detected value (Pa-Pb) is 2bar, at the moment, the A value can be 2, calculating the value Pc1 which is 9+2+2 which is 13bar, and controlling the rotating speed of the external fan through the value Pc1 which is 13 bar; the calculation control logic can be checked every delta t, and the delta t is 1 min;
or the current indoor return air temperature is 35 plus or minus 2 ℃, the evaporation pressure Pe is 11.5bar, and meanwhile, the detected value (Pa-Pb) is 2bar, at this time, the value a can be 2, the value Pc2 is 11.5+2+2 is 15.5bar, and the rotating speed of the external fan is controlled through the value Pc2 is 15.5 bar; and the same computational control logic described above can be checked every Δ t, which is 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.
In the foregoing embodiment, as for the method of the embodiment shown in fig. 1, the pressure set value for controlling the rotation speed of the external fan of the conventional variable frequency air conditioner is generally 18 to 21bar, so that the rotation speed of the external fan is relatively 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.
However, in a certain temperature region, 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 improved to be 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. For example, when the current evaporation pressure Pe is 11.5bar and (Pa-Pb) is 2bar and a is 2bar, Pc is 11.5+2+2 is 15.5bar, which is calculated by the aforementioned method, and when the second set threshold N is 1bar, the corresponding (Pc + N) is 15.5+1 is 16.5 bar.
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.
The working condition of long piping, high drop often appears in the computer lab air conditioner in the in-service use, and the pipeline pressure loss of computer lab air conditioning system can be very big under this kind of working condition, and the compressor consumption also can increase along with the increase of piping length simultaneously, can lead to the whole consumption of computer lab air conditioner to increase by a wide margin like this, and is not energy-conserving enough. The control method of the external fan of the air conditioning system realizes energy-saving control logic by controlling the rotating speed of the external fan in real time, and can better reduce the overall power consumption.
Based on the description of the embodiment of the method for controlling the external fan of the air conditioning system, the embodiment of the application also discloses a device for controlling the external fan of the air conditioning system. As shown in fig. 5, the air conditioning system external blower control device 500 includes:
a calculation module 510 for calculating a pressure difference value according to an outlet pressure of the compressor and an inlet pressure of the flow regulating device;
and the control module 520 is configured to determine a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold, and control the rotation speed of the external fan according to the target pressure value.
Optionally, the control module 520 is specifically configured to: calculating the sum of the pressure difference value, the current evaporation pressure and the first set threshold value to obtain a first target pressure value; and controlling the outer fan to operate at a first target rotating speed through the first target pressure value.
Optionally, the system further includes an obtaining module 530, configured to obtain the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulator, and the first set threshold after the system is started and operated for a preset time and the compressor reaches a rated rotation speed.
Optionally, the obtaining module 530 is further configured to obtain an outdoor temperature;
the control module 520 is further configured to determine a second target pressure value based on the first target 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; and controlling the outer fan to operate at a second target rotating speed according to the second target pressure value.
Optionally, the control module 520 is specifically configured to calculate a sum of the first target pressure value and a second set threshold value, so as to obtain the second target pressure value.
Optionally, the obtaining module 530 is specifically configured to obtain a real-time evaporation pressure and a pressure difference after the external air blower operates at the first target rotation speed for a predetermined time period;
the control module 520 is specifically configured to determine the first target pressure value according to the real-time evaporation pressure and the pressure difference value, and the first set threshold.
Optionally, the obtaining module 530 is specifically configured to:
determining the current evaporation pressure according to the indoor return air temperature, or detecting the current evaporation pressure according to a pressure sensor;
the first set threshold is determined based on a compression ratio of the compressor, a pressure differential, and a system pressure differential demand.
According to an embodiment of the present application, the air conditioner external fan control device 500 may perform the steps in the method embodiment 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. 6, which is a schematic structural diagram of an electronic device provided in the present application, the electronic device 600 may include a processor 601, an input/output device 602, a memory 603, and a computer storage medium. Wherein the various component units within the electronic device may be connected by a bus 604 or otherwise.
A computer storage medium may be stored in the memory 603 of the electronic device 600, 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 601 according to the embodiment of the present application may be configured to perform a series of processes, including the steps involved in the method shown in fig. 1 or fig. 2.
An embodiment of the present application further provides a computer storage medium (Memory), which is a Memory device in an electronic device and is used for storing programs and data. It is understood that the computer storage medium herein may include a built-in storage medium in the electronic device, and may also include an extended storage medium supported by the electronic device. Computer storage media provide storage space that stores an operating system for an electronic device. Also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), suitable for loading and execution by the processor. The computer storage medium may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory; and optionally at least one computer storage medium located remotely from the processor.
In one embodiment, one or more instructions stored in a computer storage medium may be loaded and executed by a processor to 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 for an air conditioning system, the method comprising:
calculating a pressure difference value according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device;
and confirming a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold, and controlling the rotating speed of the outer fan according to the target pressure value.
2. The method of claim 1, wherein the determining a target pressure value according to the current evaporating pressure, the pressure difference value and a first set threshold value comprises:
calculating the sum of the pressure difference value, the current evaporation pressure and the first set threshold value to obtain a first target pressure value;
and controlling the outer fan to operate at a first target rotating speed through the first target pressure value.
3. The air conditioning system external fan control method according to claim 1, further comprising:
and after the system is started and operates for a preset time and the compressor reaches a rated rotating speed, acquiring the current evaporation pressure, the outlet pressure of the compressor, the inlet pressure of the flow regulating device and the first set threshold.
4. The air conditioning system external fan control method according to claim 2, 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 target pressure value based on the first target pressure value;
and controlling the outer fan to operate at a second target rotating speed according to the second target pressure value.
5. The air conditioning system external fan control method of claim 4, wherein said identifying a second target pressure value based on the first target pressure value comprises,
and calculating the sum of the first target pressure value and a second set threshold value to obtain a second target pressure value.
6. The method of claim 5, further comprising:
acquiring real-time evaporation pressure and a pressure difference value after the external fan operates at the first target rotating speed for a preset time period;
and confirming the first target pressure value according to the real-time evaporation pressure and the pressure difference value and the first set threshold value.
7. The method of any of claims 3-6, wherein said obtaining a current evaporating pressure comprises:
determining the current evaporation pressure according to the indoor return air temperature, or detecting the current evaporation pressure according to a pressure sensor;
the acquiring a first set threshold includes: the first set threshold is determined based on a compression ratio of the compressor, a pressure differential, and a system pressure differential demand.
8. An external fan control device of an air conditioning system, comprising:
the calculating module is used for calculating a pressure difference value according to the outlet pressure of the compressor and the inlet pressure of the flow regulating device;
and the control module is used for confirming a target pressure value according to the current evaporation pressure, the pressure difference value and a first set threshold value, and controlling the rotating speed of the outer fan according to the target pressure value.
9. An electronic device, comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the air conditioning system external fan control method of any of claims 1 to 7.
10. A computer-readable storage medium, characterized in that a computer program is stored which, when being executed by a processor, causes the processor to carry out the steps of the air conditioning system external fan control method according to any one of claims 1 to 7.
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| CN202210688315.4A CN115076919A (en) | 2022-06-17 | 2022-06-17 | External fan control method and device of air conditioning system, electronic equipment and storage medium |
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| CN202210688315.4A CN115076919A (en) | 2022-06-17 | 2022-06-17 | External fan control method and device of air conditioning system, electronic equipment and storage medium |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120291984A1 (en) * | 2010-11-16 | 2012-11-22 | Liebert Corporation | Kind Of Air Conditioner System And Control Method Of Its Condensing Fan |
| CN104838214A (en) * | 2012-10-10 | 2015-08-12 | 特灵国际有限公司 | Variable fan speed control in hvac systems and methods |
| EP3404345A2 (en) * | 2017-04-27 | 2018-11-21 | Hitachi-Johnson Controls Air Conditioning, Inc. | Refrigeration cycle device |
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2022
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120291984A1 (en) * | 2010-11-16 | 2012-11-22 | Liebert Corporation | Kind Of Air Conditioner System And Control Method Of Its Condensing Fan |
| CN104838214A (en) * | 2012-10-10 | 2015-08-12 | 特灵国际有限公司 | Variable fan speed control in hvac systems and methods |
| EP3404345A2 (en) * | 2017-04-27 | 2018-11-21 | Hitachi-Johnson Controls Air Conditioning, Inc. | Refrigeration cycle device |
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