CN111678249A - Operation control method for air conditioning equipment, air conditioning equipment and storage medium - Google Patents

Operation control method for air conditioning equipment, air conditioning equipment and storage medium Download PDF

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Publication number
CN111678249A
CN111678249A CN202010563277.0A CN202010563277A CN111678249A CN 111678249 A CN111678249 A CN 111678249A CN 202010563277 A CN202010563277 A CN 202010563277A CN 111678249 A CN111678249 A CN 111678249A
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China
Prior art keywords
differential pressure
pressure value
air conditioning
target
value
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CN202010563277.0A
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CN111678249B (en
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邱艺德
李元阳
阎杰
梁锐
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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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
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/40—Pressure, e.g. wind pressure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an operation control method of air conditioning equipment, the air conditioning equipment and a storage medium, wherein the operation control method of the air conditioning equipment comprises the following steps: acquiring a rated pressure drop value, a water inlet pressure value and a water outlet pressure value of the air conditioning equipment; determining a target differential pressure value of the water inlet pressure value and the water outlet pressure according to the rated pressure drop value, and calculating a current differential pressure value of the water inlet pressure value and the water outlet pressure value; and controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value. According to the embodiment of the invention, the water inlet pressure and the water outlet pressure are changed by controlling the differential pressure bypass valve, so that the condition that the water flow of the unit evaporator is reduced below a lower limit value due to an overlarge differential pressure value can be avoided, and the operation stability and the operation effect of the air conditioning equipment are improved. On the other hand, the differential pressure bypass valve can be accurately controlled, and the operation effect of the air conditioning equipment is further improved.

Description

Operation control method for air conditioning equipment, air conditioning equipment and storage medium
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to an operation control method of the air conditioning equipment, the air conditioning equipment and a computer readable storage medium.
Background
In the related art, in a water system of an air conditioning device, when a tail end proportional-integral valve acts, the water flow of a pipeline changes, and if the differential pressure value of the system exceeds a certain value at the moment, the water flow of a unit evaporator is easily reduced to be below a lower limit value, so that the operation effect of the air conditioning device is poor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the present invention proposes an operation control method of an air conditioning apparatus.
A second aspect of the present invention proposes an air conditioning apparatus.
A third aspect of the invention proposes a computer-readable storage medium.
In view of the above, a first aspect of the present invention provides an operation control method for an air conditioning apparatus, the air conditioning apparatus including a water collector and a water separator, a differential pressure bypass valve being provided between the water collector and the water separator, the operation control method including: acquiring a rated pressure drop value, a water inlet pressure value and a water outlet pressure value of the air conditioning equipment; determining a target differential pressure value of the water inlet pressure value and the water outlet pressure according to the rated pressure drop value, and calculating a current differential pressure value of the water inlet pressure value and the water outlet pressure value; and controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value.
According to the technical scheme, a differential pressure bypass valve is arranged between a water collector and a water distributor of the air conditioning equipment, and the differential pressure bypass valve is controlled to work according to the current differential pressure value and the target differential pressure value. Specifically, a target pressure difference value of water inlet and outlet of the air conditioning equipment can be determined according to the rated pressure drop of the air conditioning equipment, a water inlet pressure value of a main water inlet pipeline of the air conditioning equipment and a water outlet pressure value of a main water outlet pipeline of the air conditioning equipment are detected in real time, and a current pressure difference value of the air conditioning equipment is calculated according to the water inlet pressure value and the water outlet pressure value.
When the differential pressure value is not in accordance with the target differential pressure value, the water inlet pressure and the water outlet pressure are changed by controlling the differential pressure bypass valve, so that the condition that the water flow of the unit evaporator is reduced below the lower limit value due to the overlarge differential pressure value can be avoided, and the operation stability and the operation effect of the air conditioning equipment are improved. On the other hand, the target differential pressure value is determined according to the rated pressure drop value of the air conditioning equipment, the water inlet pressure of the main water inlet pipeline and the water outlet pressure of the main water outlet pipeline are collected, the differential pressure bypass valve can be accurately controlled, and the operation effect of the air conditioning equipment is further improved.
In addition, the operation control method of the air conditioning equipment in the above technical solution provided by the present invention may further have the following additional technical features:
in the above technical solution, the step of controlling the differential pressure bypass valve to operate according to the current differential pressure value and the target differential pressure value specifically includes: determining a first target opening according to the current differential pressure value and the target differential pressure value on the basis of the condition that the current differential pressure value is less than or equal to the target differential pressure value; and controlling the differential pressure bypass valve to open the first target opening degree.
In this technical solution, if the current differential pressure value is less than or equal to the target differential pressure value, the opening degree of the differential pressure bypass valve may be controlled by the differential pressure value. Specifically, a first target opening degree is determined according to the target differential pressure value and the current differential pressure value of the current system, and meanwhile the bypass valve is controlled to be opened to the first target opening degree. After the bypass valve opens the first target opening, water flows through the bypass pipeline, the minimum flow requirement of the unit is guaranteed, and the operation efficiency of the air conditioning equipment is effectively guaranteed.
In any of the above technical solutions, the step of controlling the differential pressure bypass valve to operate according to the current differential pressure value and the target differential pressure value further includes: acquiring a target air supply temperature of the air conditioning equipment based on the condition that the current differential pressure value is greater than the target differential pressure value; and determining a second target opening according to the target air supply temperature, and controlling the differential pressure bypass valve to open the second target opening.
In the technical scheme, if the flow of the water pump in the system is instantly increased or a plurality of water pumps are started simultaneously, the current pressure difference value of the system can be large, but the flow of the main machine still can not meet the flow requirement, and at the moment, the bypass valve is controlled through the pressure difference value, so that the misoperation of the bypass valve can be caused. Therefore, if the current pressure difference value is larger than the target pressure difference value, the target air supply temperature of the air conditioning equipment is obtained to avoid the misoperation of the differential pressure bypass valve, the differential pressure bypass valve is controlled to work according to the target air supply temperature, the misoperation of the differential pressure bypass valve can be effectively prevented, and the reliability and the stability of the operation of the air conditioning equipment are improved.
In any of the above technical solutions, the step of controlling the differential pressure bypass valve to operate according to the current differential pressure value and the target differential pressure value further includes: acquiring a target return air temperature of the air conditioning equipment based on the condition that the current differential pressure value is greater than the target differential pressure value; and determining a third target opening according to the target return air temperature, and controlling the differential pressure bypass valve to open the third target opening.
In the technical scheme, if the flow of the water pump in the system is instantly increased or a plurality of water pumps are started simultaneously, the current pressure difference value of the system can be large, but the flow of the main machine still can not meet the flow requirement, and at the moment, the bypass valve is controlled through the pressure difference value, so that the misoperation of the bypass valve can be caused. Therefore, if the current differential pressure value is larger than the target differential pressure value, the target return air temperature of the air conditioning equipment is obtained to avoid the misoperation of the differential pressure bypass valve, the differential pressure bypass valve is controlled to work according to the target return air temperature, the misoperation of the differential pressure bypass valve can be effectively prevented, and the reliability and the stability of the operation of the air conditioning equipment are improved.
In any of the above technical solutions, the step of determining the first target opening degree according to the current differential pressure value and the target differential pressure value specifically includes: and inputting the target difference value and the current differential pressure value into a proportional integral derivative controller, and determining a first target opening degree through the proportional integral derivative controller.
In the technical scheme, the opening degree of the differential pressure bypass valve can be determined by a Proportional-integral-derivative (PID) control method. Specifically, the target differential pressure value and the current differential pressure value are input to a proportional integral derivative controller, a first target opening degree is output through the proportional integral derivative controller, and the differential pressure bypass valve is controlled to be opened to the first target opening degree. At the moment, the current differential pressure value of the system is changed in a sounding mode, the target differential pressure value and the changed current differential pressure value are repeatedly input into the proportional-integral controller, the first target opening degree of the differential pressure bypass valve is further adjusted, and a closed-loop control cycle is formed until the system is stable. The differential pressure bypass valve is controlled by the current differential pressure value of the system through a proportional-integral-derivative control method, the algorithm is simple, robustness is good, reliability is high, and the stability and reliability of operation of the air conditioning equipment can be effectively improved.
In any of the above technical solutions, the operation control method of the air conditioning equipment further includes: acquiring the variable quantity of the air supply temperature of the air conditioning equipment and the variable quantity of the current differential pressure value; and repeatedly executing the step of controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value on the basis of the condition that the variation of the supply air temperature is greater than or equal to the first variation threshold and/or the variation of the current differential pressure value is greater than or equal to the second variation threshold.
After the differential pressure bypass valve is adjusted, the system continuously detects the supply air temperature and the current differential pressure value, and calculates the real-time variation of the supply air temperature. If the system detects that the air supply temperature changes, specifically, the air supply temperature variation is larger than or equal to a first variation threshold, or the current differential pressure value of the system is detected to change, specifically, when the variation of the current differential pressure value is larger than or equal to a second variation threshold, the system state is changed, at this moment, the step of controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value is repeatedly executed, and the opening of the differential pressure bypass valve is controlled again to ensure that the system runs stably.
In any of the above technical solutions, the air conditioning equipment further includes a proportional-integral valve, the proportional-integral valve is disposed in a worst loop of the air conditioning equipment, and the operation control method of the air conditioning equipment further includes: determining a fourth target opening according to the target differential pressure value on the basis of the condition that the current differential pressure value is smaller than or equal to the target differential pressure value, and controlling a proportional-integral valve to open the fourth target opening; and determining a fifth target opening according to the target return air temperature of the air conditioning equipment or the target air supply temperature of the air conditioning equipment based on the condition that the current differential pressure value is greater than the target differential pressure value, and controlling the proportional-integral valve to open the fifth target opening.
In the technical scheme, if the differential pressure value is less than or equal to the target differential pressure value, the opening degree of the proportional-integral valve of the worst loop is controlled according to the target differential pressure value. If the pressure difference value is larger than the target pressure difference value, the opening degree of the proportional integral valve of the worst loop is controlled according to the target air supply temperature or the target return air temperature of the air conditioning equipment, linkage control of the differential pressure bypass valve and the proportional integral valve on the worst loop in the air conditioning equipment is formed, the field debugging workload can be reduced, the equipment configuration is reduced, and the engineering cost is reduced.
A second aspect of the present invention provides an air conditioning apparatus comprising: a memory having a computer program stored thereon; a processor configured to implement the steps of the operation control method of the air conditioning equipment provided in any one of the above technical solutions when executing the computer program. Therefore, the air conditioning equipment includes all the beneficial technical effects of the operation control method of the air conditioning equipment provided in any one of the above technical solutions, and details are not repeated herein.
In the above technical solution, the air conditioning apparatus further includes: the water inlet main pipeline is provided with a water collector; the water outlet main pipeline is provided with a water separator; the bypass pipeline is arranged between the water collector and the water distributor, and a differential pressure bypass valve is arranged on the bypass pipeline; the first pressure sensor is arranged on the water inlet main pipeline and is configured to acquire the water inlet pressure value of the air conditioning equipment; and the second pressure sensor is arranged on the main water outlet pipeline and is configured to acquire the water outlet pressure value of the air conditioning equipment.
In the technical scheme, a water collector of the air conditioning equipment is arranged on a water inlet main pipeline, a water separator is arranged on a water outlet main pipeline, a bypass pipeline is arranged between the water collector and the water separator, and the minimum flow rate when the system pressure difference is large can be ensured through the bypass pipeline. The bypass pipeline is provided with the differential pressure bypass valve, the differential pressure bypass valve is controlled to work according to the target differential pressure value and the actual differential pressure value of the system, the condition that the water flow of the unit evaporator is reduced below a lower limit value due to the fact that the differential pressure value is too large can be avoided, and the operation stability and the operation effect of the air conditioning equipment are improved.
The first pressure sensor is arranged on the main water inlet pipeline and acquires a water inlet pressure value, the second pressure sensor is arranged on the water outlet main pipeline and acquires a water outlet pressure value, and the current differential pressure value of the air conditioning equipment can be accurately obtained by calculating the difference value between the water inlet pressure value and the water outlet pressure value.
In any one of the above technical solutions, the air conditioning apparatus further includes: and the proportional integral valve is arranged on the worst loop of the air conditioning equipment and is connected with the processor.
In the technical scheme, the linkage control of the differential pressure bypass valve and the proportional-integral valve on the worst loop in the air conditioning equipment is formed, so that the field debugging workload can be reduced, the equipment configuration can be reduced, and the construction cost can be reduced.
A third aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the operation control method of an air conditioning apparatus provided in any one of the above-described technical solutions. Therefore, the computer-readable storage medium includes all the advantageous technical effects of the operation control method of the air conditioning equipment provided in any one of the above technical solutions, and is not described herein again.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 illustrates one of operation control methods of an air conditioner according to one embodiment of the present invention;
fig. 2 illustrates a second operation control method of an air conditioner according to an embodiment of the present invention;
fig. 3 illustrates a third method for controlling the operation of an air conditioner according to an embodiment of the present invention;
fig. 4 illustrates a fourth operation control method of an air conditioner according to an embodiment of the present invention;
fig. 5 illustrates a fifth operation control method of an air conditioner according to an embodiment of the present invention;
fig. 6 is a block diagram illustrating the construction of an air conditioning apparatus according to an embodiment of the present invention;
fig. 7 shows a seventh operation control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
An operation control method of an air conditioner, and a computer-readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 7.
Example one
In one embodiment of the present invention, as shown in fig. 1, there is provided an operation control method of an air conditioner for controlling the air conditioner, wherein the air conditioner includes a water collector and a water separator, and a differential pressure bypass valve is disposed between the water collector and the water separator.
Fig. 1 shows one of flowcharts of an operation control method of an air conditioning apparatus according to an embodiment of the present invention, specifically, the control method includes:
102, acquiring a rated pressure drop value, a water inlet pressure value and a water outlet pressure value of air conditioning equipment;
104, determining a target differential pressure value of the water inlet pressure value and the water outlet pressure according to the rated pressure drop value, and calculating a current differential pressure value of the water inlet pressure value and the water outlet pressure value;
and 106, controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value.
In the embodiment, a differential pressure bypass valve is arranged between a water collector and a water separator of the air conditioning equipment, and the differential pressure bypass valve is controlled to work according to the current differential pressure value and the target differential pressure value. Specifically, a target pressure difference value of water inlet and outlet of the air conditioning equipment can be determined according to the rated pressure drop of the air conditioning equipment, a water inlet pressure value of a main water inlet pipeline of the air conditioning equipment and a water outlet pressure value of a main water outlet pipeline of the air conditioning equipment are detected in real time, and a current pressure difference value of the air conditioning equipment is calculated according to the water inlet pressure value and the water outlet pressure value.
When the differential pressure value is not in accordance with the target differential pressure value, the water inlet pressure and the water outlet pressure are changed by controlling the differential pressure bypass valve, so that the condition that the water flow of the unit evaporator is reduced below the lower limit value due to the overlarge differential pressure value can be avoided, and the operation stability and the operation effect of the air conditioning equipment are improved. On the other hand, the target differential pressure value is determined according to the rated pressure drop value of the air conditioning equipment, the water inlet pressure of the main water inlet pipeline and the water outlet pressure of the main water outlet pipeline are collected, the differential pressure bypass valve can be accurately controlled, and the operation effect of the air conditioning equipment is further improved.
Example two
In an embodiment of the present invention, fig. 2 shows a second operation control method of an air conditioning apparatus according to an embodiment of the present invention, specifically, the control method includes:
step 202, determining a first target opening according to the current differential pressure value and a target differential pressure value based on the condition that the current differential pressure value is less than or equal to the target differential pressure value;
and step 204, controlling the differential pressure bypass valve to open the first target opening.
In step 202, the step of determining the first target opening degree according to the current differential pressure value and the target differential pressure value specifically includes: and inputting the target difference value and the current differential pressure value into a proportional integral derivative controller, and determining a first target opening degree through the proportional integral derivative controller.
Meanwhile, after step 204, the supply air temperature variation of the air conditioning equipment and the variation of the current differential pressure value are continuously obtained, and when the supply air temperature variation is greater than or equal to a first variation threshold value and/or the variation of the current differential pressure value is greater than or equal to a second variation threshold value, the step of controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value is repeatedly executed.
In this embodiment, if the current differential pressure value is less than or equal to the target differential pressure value, the opening degree of the differential pressure bypass valve may be controlled by the differential pressure value. Specifically, a first target opening degree is determined according to the target differential pressure value and the current differential pressure value of the current system, and meanwhile the bypass valve is controlled to be opened to the first target opening degree. After the bypass valve opens the first target opening, water flows through the bypass pipeline, the minimum flow requirement of the unit is guaranteed, and the operation efficiency of the air conditioning equipment is effectively guaranteed.
The opening of the differential pressure bypass valve is determined by a Proportional Integral Derivative (PID) control method. Specifically, the target differential pressure value and the current differential pressure value are input to a proportional integral derivative controller, a first target opening degree is output through the proportional integral derivative controller, and the differential pressure bypass valve is controlled to be opened to the first target opening degree. At the moment, the current differential pressure value of the system is changed in a sounding mode, the target differential pressure value and the changed current differential pressure value are repeatedly input into the proportional-integral controller, the first target opening degree of the differential pressure bypass valve is further adjusted, and a closed-loop control cycle is formed until the system is stable. The differential pressure bypass valve is controlled by the current differential pressure value of the system through a proportional-integral-derivative control method, the algorithm is simple, robustness is good, reliability is high, and the stability and reliability of operation of the air conditioning equipment can be effectively improved.
After the differential pressure bypass valve is adjusted, the system continuously detects the supply air temperature and the current differential pressure value, and calculates the real-time variation of the supply air temperature. If the system detects that the air supply temperature changes, specifically, the air supply temperature variation is larger than or equal to a first variation threshold, or the current differential pressure value of the system is detected to change, specifically, when the variation of the current differential pressure value is larger than or equal to a second variation threshold, the system state is changed, at this moment, the step of controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value is repeatedly executed, and the opening of the differential pressure bypass valve is controlled again to ensure that the system runs stably.
EXAMPLE III
In an embodiment of the present invention, fig. 3 shows a third method for controlling the operation of an air conditioning apparatus according to an embodiment of the present invention, specifically, the method includes:
step 302, acquiring a target air supply temperature of the air conditioning equipment based on the condition that the current differential pressure value is greater than the target differential pressure value;
and 304, determining a second target opening according to the target air supply temperature, and controlling the differential pressure bypass valve to open the second target opening.
In this embodiment, if the flow rate of the water pump in the system is increased instantaneously or multiple water pumps are started simultaneously, the current differential pressure value of the system may be large, but the flow rate of the main machine may not reach the flow rate requirement, and at this time, the bypass valve is controlled by the differential pressure value, which may cause malfunction of the bypass valve. Therefore, if the current pressure difference value is larger than the target pressure difference value, the target air supply temperature of the air conditioning equipment is obtained to avoid the misoperation of the differential pressure bypass valve, the differential pressure bypass valve is controlled to work according to the target air supply temperature, the misoperation of the differential pressure bypass valve can be effectively prevented, and the reliability and the stability of the operation of the air conditioning equipment are improved.
Example four
In one embodiment of the present invention, fig. 4 shows a fourth operation control method of an air conditioning apparatus according to an embodiment of the present invention, specifically, the control method includes:
step 402, acquiring a target return air temperature of the air conditioning equipment based on the condition that the current differential pressure value is greater than the target differential pressure value;
and step 404, determining a third target opening according to the target return air temperature, and controlling the differential pressure bypass valve to open the third target opening.
In this embodiment, if the flow rate of the water pump in the system is increased instantaneously or multiple water pumps are started simultaneously, the current differential pressure value of the system may be large, but the flow rate of the main machine may not reach the flow rate requirement, and at this time, the bypass valve is controlled by the differential pressure value, which may cause malfunction of the bypass valve. Therefore, if the current differential pressure value is larger than the target differential pressure value, the target return air temperature of the air conditioning equipment is obtained to avoid the misoperation of the differential pressure bypass valve, the differential pressure bypass valve is controlled to work according to the target return air temperature, the misoperation of the differential pressure bypass valve can be effectively prevented, and the reliability and the stability of the operation of the air conditioning equipment are improved.
EXAMPLE five
In one embodiment of the invention, the air conditioning unit further comprises a proportional-integral valve, which is arranged in the worst-case loop of the air conditioning unit.
Fig. 5 shows a fifth operation control method of an air conditioning apparatus according to an embodiment of the present invention, specifically, the control method includes:
step 502, based on the condition that the current differential pressure value is less than or equal to the target differential pressure value, determining a fourth target opening according to the target differential pressure value, and controlling a proportional-integral valve to open the fourth target opening;
and step 504, determining a fifth target opening according to the target return air temperature of the air conditioning equipment or the target air supply temperature of the air conditioning equipment based on the condition that the current differential pressure value is greater than the target differential pressure value, and controlling the proportional-integral valve to open the fifth target opening.
In this embodiment, the most unfavorable pipeline of the air conditioning equipment refers to a loop with the lowest allowable specific friction resistance R in the hydraulic calculation of the pipe network system. In particular to the loop with the farthest pipeline length, the smallest applied pressure and the largest load, namely the tail-end loop of the air conditioning equipment.
And if the differential pressure value is less than or equal to the target differential pressure value, controlling the opening of the proportional integral valve of the most unfavorable loop according to the target differential pressure value. If the pressure difference value is larger than the target pressure difference value, the opening degree of the proportional integral valve of the worst loop is controlled according to the target air supply temperature or the target return air temperature of the air conditioning equipment, linkage control of the differential pressure bypass valve and the proportional integral valve on the worst loop in the air conditioning equipment is formed, the field debugging workload can be reduced, the equipment configuration is reduced, and the engineering cost is reduced.
EXAMPLE six
In an embodiment of the present invention, fig. 6 shows a block diagram of an air conditioner according to an embodiment of the present invention, and the air conditioner 600 includes a memory 602 on which a computer program is stored and a processor 604 which implements the steps of the operation control method of the air conditioner 600 provided in any one of the above embodiments when the processor executes the computer program.
Wherein, the air conditioning apparatus 600 further includes: the system comprises a host 606 and a main water inlet pipeline 608, wherein a water collector 610 is arranged on the main water inlet pipeline 608; a water separator 614 is arranged on the main water outlet pipeline 612; a bypass line 616 disposed between the water trap 610 and the water separator 614, the bypass line 616 having a differential pressure bypass valve 618; a first pressure sensor 620 disposed on the main water inlet pipe 608, wherein the first pressure sensor 620 is configured to obtain a water inlet pressure value of the air conditioner 600; a second pressure sensor 622 disposed on the main water outlet pipe 612, wherein the second pressure sensor 622 is configured to obtain a water outlet pressure value of the air conditioner 600; and a proportional integral valve 624 disposed on the worst-case loop 626 of the air conditioner 600, wherein the proportional integral valve 624 is connected to the processor 604.
In this embodiment, the air conditioner 600 includes all the beneficial technical effects of the operation control method of the air conditioner 600 provided in any of the above embodiments, which are not described herein again.
Meanwhile, a water collector 610 of the air conditioning equipment 600 is arranged on the water inlet main pipeline 608, a water separator 614 is arranged on the water outlet main pipeline, and a bypass pipeline 616 is arranged between the water collector 610 and the water separator 614, so that the minimum flow rate when the system pressure difference is large can be ensured through the bypass pipeline 616. The bypass pipeline 616 is provided with a differential pressure bypass valve 618, and the differential pressure bypass valve 618 is controlled to work according to the target differential pressure value and the actual differential pressure value of the system, so that the condition that the water flow of the unit evaporator is reduced below the lower limit value due to the overlarge differential pressure value can be avoided, and the operation stability and the operation effect of the air conditioning equipment 600 are improved.
The first pressure sensor 620 is disposed on the main water inlet pipeline and acquires a water inlet pressure value, the second pressure sensor 622 is disposed on the water outlet main pipeline 612 and acquires a water outlet pressure value, and a current differential pressure value of the air conditioning equipment 600 can be accurately obtained by calculating a difference value between the water inlet pressure value and the water outlet pressure value.
The linkage control of the differential pressure bypass valve 618 and the proportional integral valve 624 on the worst loop 626 in the air conditioning equipment 600 is formed, so that the field debugging workload can be reduced, the equipment configuration can be reduced, and the construction cost can be reduced.
EXAMPLE seven
In an embodiment of the present invention, the technical solution of the present invention is described in its entirety with a complete embodiment.
According to the embodiment of the invention, the pressure sensors are arranged on the main water inlet and outlet pipes of the host, the sensor signals are collected to the controller, the controller automatically calculates the target differential pressure value according to the rated pressure value of the host, and the opening of the differential pressure bypass valve is controlled according to the target differential pressure value.
In some embodiments, a water valve state monitoring box can be further arranged on the worst loop, and the water valve state monitoring box at the tail end is communicated with a main control box, so that the linkage control of the differential pressure bypass valve and the proportional integral valve on the worst loop is realized.
Specifically, the differential pressure bypass valve controller can be integrated in a group control system or independently used as a controller to communicate with the control cabinet. Real-time data of 2 pressure sensors are collected. The controller automatically calculates a target differential pressure value delta P according to a rated pressure drop value recorded on a host nameplate input by a user, calculates a real-time differential pressure delta Ps through the collected inlet and outlet water pressure values P1 and P2, and controls the opening of the differential pressure bypass valve by comparing the delta P with the delta Ps and carrying out proportional integral.
In other real-time modes, whether the target air supply temperature control or the target pressure difference control is carried out is judged according to the difference value of the target pressure difference delta P and the actual pressure difference delta Ps. Fig. 7 shows a seventh operation control method of an air conditioner according to an embodiment of the present invention:
step 702, judging whether the actual differential pressure value is larger than the target differential pressure value; if yes, go to step 704, otherwise go to step 706;
step 704, controlling a differential pressure bypass valve according to the target air supply temperature or the target return air temperature;
step 706, controlling a differential pressure bypass valve according to the target differential pressure value;
step 708, adjusting the opening of the differential pressure bypass valve;
in step 710, a change in supply air temperature and/or actual pressure differential is determined.
After step 710 is performed, return is made to step 702.
Example eight
In one embodiment of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the operation control method of an air conditioning apparatus as provided in any one of the above embodiments. Therefore, the computer-readable storage medium includes all the advantageous technical effects of the operation control method of the air conditioning equipment provided in any one of the above embodiments, and will not be described herein again.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. An operation control method of an air conditioning apparatus, characterized in that the air conditioning apparatus includes a water collector and a water separator, a differential pressure bypass valve is provided between the water collector and the water separator, the operation control method includes:
acquiring a rated pressure drop value, a water inlet pressure value and a water outlet pressure value of the air conditioning equipment;
determining a target pressure difference value of the water inlet pressure value and the water outlet pressure value according to the rated pressure drop value, and calculating a current pressure difference value of the water inlet pressure value and the water outlet pressure value;
and controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value.
2. The operation control method of an air conditioning apparatus according to claim 1, wherein the step of controlling the operation of the differential pressure bypass valve according to the current differential pressure value and the target differential pressure value specifically includes:
determining a first target opening according to the current differential pressure value and the target differential pressure value on the basis of the condition that the current differential pressure value is less than or equal to the target differential pressure value;
and controlling the differential pressure bypass valve to open the first target opening degree.
3. The operation control method of an air conditioning apparatus according to claim 2, wherein the step of controlling the operation of the differential pressure bypass valve in accordance with the current differential pressure value and the target differential pressure value further comprises:
acquiring a target air supply temperature of the air conditioning equipment based on the condition that the current differential pressure value is greater than the target differential pressure value;
and determining a second target opening according to the target air supply temperature, and controlling the differential pressure bypass valve to open the second target opening.
4. The operation control method of an air conditioning apparatus according to claim 2, wherein the step of controlling the operation of the differential pressure bypass valve in accordance with the current differential pressure value and the target differential pressure value further comprises:
acquiring a target return air temperature of the air conditioning equipment based on the condition that the current differential pressure value is greater than the target differential pressure value;
and determining a third target opening according to the target return air temperature, and controlling the differential pressure bypass valve to open the third target opening.
5. The operation control method of an air conditioning apparatus according to claim 2, wherein the step of determining the first target opening degree based on the current differential pressure value and the target differential pressure value specifically includes:
and inputting the target difference value and the current differential pressure value into a proportional integral derivative controller, and determining the first target opening degree through the proportional integral derivative controller.
6. The operation control method of an air conditioning apparatus according to any one of claims 1 to 5, characterized by further comprising:
acquiring the variable quantity of the air supply temperature of the air conditioning equipment and the variable quantity of the current differential pressure value;
and repeatedly executing the step of controlling the differential pressure bypass valve to work according to the current differential pressure value and the target differential pressure value on the basis of the condition that the air supply temperature variation is larger than or equal to a first variation threshold value and/or the variation of the current differential pressure value is larger than or equal to a second variation threshold value.
7. The operation control method of an air conditioning apparatus according to claim 3 or 4, characterized in that the air conditioning apparatus further includes a proportional-integral valve provided in a worst-case loop of the air conditioning apparatus, the operation control method of an air conditioning apparatus further comprising:
determining a fourth target opening according to the target differential pressure value on the basis of the condition that the current differential pressure value is smaller than or equal to the target differential pressure value, and controlling the proportional-integral valve to open the fourth target opening;
and determining a fifth target opening according to the target return air temperature of the air conditioning equipment or the target air supply temperature of the air conditioning equipment on the basis of the condition that the current differential pressure value is greater than the target differential pressure value, and controlling the proportional-integral valve to open the fifth target opening.
8. An air conditioning apparatus, characterized by comprising:
a memory having a computer program stored thereon;
a processor configured to implement the steps of the operation control method of the air conditioning apparatus according to any one of claims 1 to 7 when executing the computer program.
9. The air conditioning apparatus as claimed in claim 8, further comprising:
the water inlet main pipeline is provided with a water collector;
the water outlet main pipeline is provided with a water separator;
the bypass pipeline is arranged between the water collector and the water separator, and a differential pressure bypass valve is arranged on the bypass pipeline;
the first pressure sensor is arranged on the main water inlet pipeline and is configured to acquire the water inlet pressure value of the air conditioning equipment;
and the second pressure sensor is arranged on the main water outlet pipeline and is configured to acquire the water outlet pressure value of the air conditioning equipment.
10. The air conditioning apparatus as claimed in claim 8 or 9, further comprising:
and the proportional integral valve is arranged on the worst loop of the air conditioning equipment and is connected with the processor.
11. A computer-readable storage medium on which a computer program is stored, characterized in that the computer program realizes the steps of the operation control method of an air conditioning apparatus according to any one of claims 1 to 7 when being executed by a processor.
CN202010563277.0A 2020-06-19 2020-06-19 Operation control method for air conditioning equipment, air conditioning equipment and storage medium Active CN111678249B (en)

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Citations (6)

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Publication number Priority date Publication date Assignee Title
CN1629556A (en) * 2003-12-19 2005-06-22 珠海福士得冷气工程有限公司 Energy-saving central air conditioning system
JP2010236786A (en) * 2009-03-31 2010-10-21 Yamatake Corp Supply water temperature control device and method therefor
CN102705956A (en) * 2012-06-01 2012-10-03 武汉裕生智能节能设备有限公司 Optimal control device and method for primary pump variable flow system
CN203771629U (en) * 2014-01-14 2014-08-13 江苏捷卡自动化控制设备有限公司 Differential dynamic balance energy-saving control device for closed circulating water system of central air-conditioning machine room
CN106091744A (en) * 2016-05-31 2016-11-09 北京百度网讯科技有限公司 Data center machine room, greenhouse and Power Cycle
CN111047117A (en) * 2019-12-31 2020-04-21 中维通(北京)科技有限公司 Differential pressure bypass valve energy-saving optimization method based on terminal load prediction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1629556A (en) * 2003-12-19 2005-06-22 珠海福士得冷气工程有限公司 Energy-saving central air conditioning system
JP2010236786A (en) * 2009-03-31 2010-10-21 Yamatake Corp Supply water temperature control device and method therefor
CN102705956A (en) * 2012-06-01 2012-10-03 武汉裕生智能节能设备有限公司 Optimal control device and method for primary pump variable flow system
CN203771629U (en) * 2014-01-14 2014-08-13 江苏捷卡自动化控制设备有限公司 Differential dynamic balance energy-saving control device for closed circulating water system of central air-conditioning machine room
CN106091744A (en) * 2016-05-31 2016-11-09 北京百度网讯科技有限公司 Data center machine room, greenhouse and Power Cycle
CN111047117A (en) * 2019-12-31 2020-04-21 中维通(北京)科技有限公司 Differential pressure bypass valve energy-saving optimization method based on terminal load prediction

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