WO2020062598A1 - Appareil et procédé de commande de fonctionnement pour unité à division multiple d'eau et support et système de climatisation à division multiple d'eau - Google Patents

Appareil et procédé de commande de fonctionnement pour unité à division multiple d'eau et support et système de climatisation à division multiple d'eau Download PDF

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Publication number
WO2020062598A1
WO2020062598A1 PCT/CN2018/120632 CN2018120632W WO2020062598A1 WO 2020062598 A1 WO2020062598 A1 WO 2020062598A1 CN 2018120632 W CN2018120632 W CN 2018120632W WO 2020062598 A1 WO2020062598 A1 WO 2020062598A1
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Prior art keywords
temperature
water
water temperature
outlet water
difference
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PCT/CN2018/120632
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English (en)
Chinese (zh)
Inventor
袁占彪
谷月明
孟红武
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珠海格力电器股份有限公司
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Publication of WO2020062598A1 publication Critical patent/WO2020062598A1/fr

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers

Definitions

  • the present application relates to the technical field of unit control, and in particular, to a method, device, medium and water multi-air-conditioning system for water multi-line group operation control.
  • Chillers can generally be divided into water-cooled and air-cooled according to the refrigeration form.
  • water-cooled chiller is used to output chilled water to cool the room.
  • the chiller in the related technology includes a host and a heat dissipation terminal disposed indoor.
  • the host sends chilled water to the heat dissipation terminal in the room according to the control of the crew, and the heat dissipation terminal performs cooling processing according to the user's adjustment instruction. Because the main engine and the cooling end are controlled independently, it is easy to cause energy waste, and the traditional water unit has the disadvantage of low control reliability.
  • a water multiple online group operation control method, device, medium and water multiple air conditioning system that can improve the control reliability of the unit can be provided, which can realize the linkage control of the unit and the terminal device, and perform water temperature control according to the actual load, reducing Waste of energy improves the control reliability of the unit.
  • a method for controlling the operation of a water multi-line group includes:
  • the outlet water temperature control is performed according to the set outlet water temperature.
  • a water multi-line group operation control device includes:
  • a temperature acquisition module configured to acquire ambient temperature data collected from an area where the end device is located
  • the water temperature calculation module is configured to obtain the internal machine load rate of the water multi-connection group according to the ambient temperature data, and obtain the set water temperature according to the internal machine load rate;
  • the water temperature control module is configured to perform outlet water temperature control according to the set outlet water temperature.
  • a computer-readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, the following steps are implemented:
  • the outlet water temperature control is performed according to the set outlet water temperature.
  • a water multiple air-conditioning system includes a water multiple connection group and an end device connected to the water multiple connection group, and the water multiple connection group performs outlet water temperature control through the above method.
  • the above-mentioned water multi-line group operation control method, device, medium and water multi-line air-conditioning system calculate the internal machine load rate of the water multi-line group through the detected ambient temperature data of the area where the terminal device is located, and determine the internal machine load rate based on the internal machine load rate Set the outlet water temperature to control the outlet water temperature, realize the linkage control of the unit and the terminal device, and control the water temperature according to the actual load, reduce energy waste, and solve the asynchronous problem caused by the independent control of the host and terminal of the traditional chiller while It also improves the unit control reliability.
  • FIG. 1 is a flowchart of a method for controlling a multi-line group operation in some embodiments
  • FIG. 2 is a flowchart of obtaining an internal machine load rate of a water connection group according to environmental temperature data in some embodiments
  • FIG. 3 is a flow chart of effluent water temperature control according to a set effluent temperature in some embodiments
  • FIG. 4 is a flowchart of a water multi-line group operation control device in some embodiments.
  • FIG. 5 is a schematic structural diagram of a water multiple air conditioning system in some embodiments.
  • FIG. 6 is a schematic diagram of determining an initial water temperature of a water multi-air-conditioning system in some embodiments
  • FIG. 7 is a timing chart of room temperature adjustment and load operation in the first stage of the water multiple air conditioning system in some embodiments.
  • FIG. 8 is a timing chart of room temperature adjustment and load operation in the second stage of the water multiple air conditioning system in some embodiments.
  • a method for controlling the operation of a water-online group includes:
  • Step S110 Acquire ambient temperature data collected from the area where the end device is located.
  • the host can be connected to the end device through the host of the water connection group.
  • the area where the end device is located can be a closed area such as a room or a processing workshop.
  • the end device uses the cold (hot) water generated by the host to heat or cool the area.
  • the ambient temperature package installed on the end device can be used to collect the ambient temperature in the area where the end device is located, and the collected ambient temperature data can be transmitted to the host for the host to use as a reference for the temperature control of the outlet water.
  • the following description is based on an example where an end device is installed in a room.
  • Step S120 Obtain the internal machine load rate of the water-on-line group according to the ambient temperature data, and obtain the set water temperature according to the internal machine load rate.
  • the host receives the ambient temperature data of the room where the opened end device is located (hereinafter referred to as the startup room), calculates the load rate of the internal unit in combination with the parameters saved in advance, and obtains the set water temperature according to the internal unit load rate.
  • the internal machine load factor of the water-on-line group is obtained according to the ambient temperature data, including steps S122 to S126.
  • S122 Calculate the actual temperature difference according to the ambient temperature data and the user-set temperature. Specifically, the host calculates the difference between the indoor ambient temperature of the current boot room and the user-set temperature to obtain the actual temperature difference ⁇ T in in the boot room. Wherein, the temperature set by the user for the area may be obtained through the end device, the host receives the temperature set by the user and calculates the temperature difference, or may calculate the temperature difference based on the user-set temperature stored in advance.
  • the specific value of the temperature difference comparison reference ⁇ T is not unique and can be adjusted according to the actual situation.
  • S126 Obtain the internal machine load rate according to the temperature load coefficient and the preset cooling capacity of the main engine and the cooling capacity of the terminal device. Specifically, a host previously stored host refrigerant amount W and a single terminal apparatus cooling capacity W i, and in conjunction with the boot room temperature corresponding to the load factor X i, end-device refrigerant amount W i and a host refrigerant amount W is calculated to obtain the machine load factor ⁇ .
  • the host computer includes an external device installed outdoors and an internal device installed indoors. The external device is connected to the internal device, and the internal device is connected to a terminal device in each room.
  • the method of calculating the set water temperature according to the internal machine load factor ⁇ is also not unique.
  • the steps In S120 the set outlet water temperature is obtained according to the load rate of the internal unit, which includes: obtaining the corresponding set outlet water temperature according to the internal unit load rate and a preset load rate-outlet temperature correspondence relationship.
  • the type of the correspondence relationship between the load rate and the water temperature is not unique, and it can be a quadratic curve equation.
  • the corresponding relationship between the load rate and the outlet water temperature may also be a linear equation.
  • the quadratic curve adjustment is more energy-efficient and the primary curve adjustment is faster.
  • the required corresponding relationship can be selected according to the actual needs for the calculation of the set water temperature t.
  • Step S130 Perform outlet water temperature control according to the set outlet water temperature.
  • the host computer calculates the set outlet water temperature t, it adjusts the water temperature of the outlet water delivered to the terminal device according to the set outlet water temperature t. It can be understood that after the host obtains the initial outlet temperature and performs water temperature control, it can also calculate the target outlet temperature based on the collected ambient temperature data in real time according to a preset update period a, and perform outlet water temperature control based on the calculated target outlet temperature.
  • step S130 includes steps S132 and S134.
  • Step S132 Control the outlet water temperature according to the set outlet water temperature until the average value of the difference between the ambient temperature data of the area where the end device is located and the user-set temperature reaches 0 degrees Celsius.
  • the host is in the first stage of the outlet water temperature control according to the set outlet water temperature, and the adjustment target is to make the average room temperature difference When it reaches 0 °C, the temperature of the room that has been turned on is controlled as a whole, and the average room temperature difference It refers to the average actual boot room room room temperature T actual temperature T set by the user to set a difference ⁇ T of room.
  • the compressor the host after the initial set water temperature, the actual water temperature T set and the actual water temperature T water outlet water temperature set value of the temperature difference ⁇ T the external water temperature control unit performs a frequency down until the average room temperature difference When it reaches 0 °C, proceed to the next step to judge and adjust.
  • Step S134 Adjust the set water temperature according to the temperature change rate of the area with the largest difference between the ambient temperature data and the user-set temperature, until the maximum difference between the ambient temperature data and the user-set temperature reaches 0 degrees Celsius.
  • the temperature of about half of the rooms that have been turned on reaches the user-set temperature, and the temperature of the other half of the rooms does not reach the user-set temperature.
  • the host enters the second-stage adjustment.
  • the maximum value of the actual room temperature difference ⁇ T refers to the maximum value of the difference between the ambient temperature data and the temperature set by the user in the switched-on room.
  • Host temperature change rate according to the actual room temperature difference maximum ⁇ T room actual temperature Max Adjust the set outlet water temperature so that the maximum difference between the ambient temperature data and the user set temperature reaches 0 degrees Celsius.
  • the temperature of the effluent water is controlled in two stages according to the determined set effluent temperature, and the temperature control of all the booting rooms is gradually realized, and the control is stable and reliable.
  • the step S134 adjusts the set outlet water temperature according to the temperature change rate of the area with the largest difference between the ambient temperature data and the user-set temperature, including steps 1 and 2.
  • Step 1 When the temperature change rate of the area with the largest difference between the ambient temperature data and the temperature set by the user is greater than or equal to 0 degrees Celsius per minute, the set water temperature is adjusted downward.
  • the step of lowering the set water temperature in step 1 includes: obtaining a corresponding change range according to the temperature change rate and a preset down change range, and adjusting the set water temperature according to the obtained change range.
  • the host can set different change ranges in advance corresponding to different down-change ranges, and according to the temperature change rate The change range in which it is located extracts the corresponding change range and adjusts the set water temperature down.
  • Step 2 When the temperature change rate of the area with the largest difference between the ambient temperature data and the user-set temperature is less than 0 degrees Celsius per minute, increase or maintain the set water temperature.
  • the setting water temperature is adjusted upward or maintained in step 2, including: controlling the set water temperature to remain unchanged when the temperature change rate is in a preset maintenance change range.
  • the control sets the water temperature to be adjusted to maintain the lower limit value of the change range greater than the upper limit value of the upward change range.
  • the range of change is corresponding to the water temperature increase or the same.
  • the above water multi-line group operation control method calculates the internal load rate of the water multi-line group based on the ambient temperature data of the area where the terminal device is located, and determines the set outlet water temperature for the outlet water temperature control based on the internal machine load rate.
  • the unit and the terminal device are linked and controlled, and the water temperature is controlled according to the actual load, which reduces energy waste. While solving the asynchronous problem caused by the independent control of the main unit and the terminal of the traditional chiller, it also improves the unit control reliability.
  • a water multi-line group operation control device includes a temperature acquisition module 110, a water temperature calculation module 120, and a water temperature control module 130.
  • the temperature acquisition module 110 is configured to acquire environmental temperature data collected from an area where the end device is located.
  • the ambient temperature in the area where the end device is located can be collected through the opened ambient temperature sensing package installed on the end device, and the collected ambient temperature data can be used as a reference basis for the outlet temperature control.
  • the water temperature calculation module 120 is configured to obtain the internal machine load rate of the water multi-connection group according to the ambient temperature data, and obtain the set water temperature according to the internal machine load rate.
  • the water temperature calculation module 120 includes a temperature difference calculation unit, a load coefficient calculation unit, a load rate calculation unit, and a water temperature calculation unit.
  • the temperature difference calculation unit is used to calculate the actual temperature difference according to the ambient temperature data and the temperature set by the user.
  • the load coefficient calculation unit is configured to obtain a temperature load coefficient according to an actual temperature difference and a preset temperature difference comparison reference.
  • the load rate calculation unit is used to obtain the internal machine load rate according to the temperature load coefficient and the preset cooling capacity of the main engine and the cooling capacity of the terminal device.
  • the water temperature calculation unit is used to obtain the set water temperature according to the load rate of the internal machine. Further, in one embodiment, the water temperature calculation unit obtains a corresponding set outlet water temperature according to the internal machine load factor and a preset load factor-outlet water temperature correspondence.
  • the water temperature control module 130 is configured to perform outlet water temperature control according to the set outlet water temperature.
  • the water temperature control module 130 includes a first-stage control unit and a second-stage control unit.
  • control unit is configured to control the outlet water temperature according to the set outlet water temperature, until the average value of the difference between the ambient temperature data of the area where the end device is located and the user-set temperature reaches 0 degrees Celsius.
  • control unit is configured to adjust the set water temperature according to the temperature change rate of the area with the largest difference between the ambient temperature data and the user-set temperature until the maximum difference between the ambient temperature data and the user-set temperature reaches 0 degrees Celsius.
  • the second-stage control unit is configured to reduce the set water temperature when the temperature change rate of the area with the largest difference between the ambient temperature data and the user-set temperature is greater than or equal to 0 degrees Celsius per minute.
  • the set water temperature is adjusted upward or maintained unchanged.
  • the second-stage control unit obtains a corresponding change range according to the temperature change rate and a preset down-change range, and adjusts the set outlet water temperature according to the obtained change range. Further, when the temperature change rate is in a preset maintenance change range, the second-stage control unit controls the set water temperature to remain unchanged. When the temperature change rate is within a preset upward change range, the control sets the water temperature to be adjusted to maintain the lower limit value of the change range greater than the upper limit value of the upward change range.
  • the above water multi-line group operation control device calculates the internal load rate of the water multi-line group based on the detected ambient temperature data of the area where the end device is located, and determines the set outlet water temperature for the outlet water temperature control based on the internal machine load rate.
  • the unit and the terminal device are linked and controlled, and the water temperature is controlled according to the actual load, which reduces energy waste. While solving the asynchronous problem caused by the independent control of the main unit and the terminal of the traditional chiller, it also improves the unit control reliability.
  • Each module in the above-mentioned water multi-line group operation control device can be realized in whole or in part by software, hardware, and a combination thereof.
  • the above-mentioned modules may be embedded in the hardware form or independent of the processor in the computer device, or may be stored in the memory of the computer device in the form of software, so that the processor calls and performs the operations corresponding to the above modules.
  • a water multiple air-conditioning system which includes a water multiple connection group and an end device connected to the water multiple connection group.
  • the water multiple connection group performs outlet water temperature control through the above method.
  • the water multi-connection group includes a host connected to an end device.
  • the end device uses cold (hot) water generated by the host to heat or cool the area, and receives the ambient temperature data of the area where the end device is located through the host and performs water temperature control .
  • Figure 5 shows the structural schematic diagram of the water multi-air-conditioning system.
  • the figure is divided into two parts, the host and the end device from above and below.
  • the host is the upper part.
  • the host uses a split structure.
  • the left is the outdoor unit of the host.
  • the side is the indoor unit of the host.
  • the function of the main part is mainly composed of the compressor and the heat exchanger and the pipes connecting each component, the components that detect the temperature and pressure, the components of the protection unit, the components that realize the conversion of the refrigerant flow, and the refrigerant throttling components.
  • Water circuit heat exchangers, water pumps, water channel safety protection components, etc. are connected in order according to the order shown in the figure to produce cold (hot) water and supply it to the end device.
  • the lower part is an end device.
  • the main function is to use the cold (hot) water generated by the host to heat or cool the user's room.
  • the components are mainly fan coil units (FCU), water valves,
  • ⁇ T in the difference between the current indoor ambient temperature and the user-set temperature
  • Wi Single end cooling capacity
  • Quadratic function coefficients a, b, c;
  • ⁇ T in (for example, if the current indoor ambient temperature is 35 ° C and the temperature set by the user is 27 ° C, then ⁇ T in is 8 ° C);
  • FIG. 6 shows a schematic diagram for determining the initial water temperature.
  • the temperature control of the water multi-chamber room is performed in two stages: the control parameters that need to be defined are shown in Table 1.
  • the goal of the first stage of adjustment is to make the average value of the difference between the actual temperature of the room that has been turned on and the temperature set by the user It reaches 0 ° C, so that the temperature of the room that has been turned on can be controlled as a whole. After the first stage of control is completed, about half of the temperature of the turned-on room reaches the user-set value, but the other half of the room temperature does not reach the user-set value. At this time, enter the second stage of adjustment: the goal of the adjustment is to adjust the maximum temperature difference ⁇ T of the actual room to the actual temperature Max of the room to 0 ° C, so that the control of all room temperatures is completed.
  • the host When the host detects that any FCU sends a start signal, the host enters the initial action stage: the electronic expansion valve is at the initial opening, the fan is started in the initial gear (mid-range 7 gear), the compressor is started at 25 Hz, and it runs for 3 minutes (can be set) ) To enter the adjustment process.
  • T set water b ⁇ + c.
  • the target water temperature calculation update cycle is a; the compressor frequency is controlled according to the ⁇ T water temperature , and the other loads operate according to the normal control sequence.
  • the unit runs at the set water temperature until When it reaches 0 °C, proceed to the next step to judge and adjust.
  • the compressor starts to adjust normally, and the load timing of each load during the adjustment process is shown in Figure 7 and Figure 8.
  • the variation range of the outlet water temperature downward adjustment corresponding to different downward adjustment ranges is not unique, and can be adjusted according to the actual situation. It can be known from Table 2 and FIG. 8 that the change range increases with the increase of the lower limit value of the change range, that is, e ⁇ f ⁇ g.
  • the value of h can be set and determined according to the actual situation.
  • the external unit will operate in accordance with the shutdown sequence at the temperature point, the compressor, fan and other loads will be turned off in order, and the pump will maintain the running state.
  • the external unit When all the FCUs in the room are detected to be shut down, the external unit operates according to the shutdown sequence, the compressor, fan and other loads are turned off in turn, and the pump is stopped for 120s.
  • the above-mentioned water multiple air conditioner system calculates the internal load rate of the water multi-connection group based on the detected ambient temperature data of the area where the terminal device is located, and determines the set outlet water temperature for the outlet water temperature control based on the internal device load rate to realize the unit and The linkage control of the end device and the water temperature control according to the actual load reduce energy waste. While solving the asynchronous problem caused by the independent control of the main unit and the end of the traditional chiller, it also improves the unit control reliability.
  • a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the following steps are performed: acquiring environmental temperature data collected from an area where an end device is located; and according to the environmental temperature.
  • the data obtains the internal machine load rate of the water multi-line group, and obtains the set outlet temperature according to the internal machine load rate; and performs outlet water temperature control according to the set outlet temperature.
  • the following steps are further implemented: the actual temperature difference is calculated according to the ambient temperature data and the user-set temperature; the temperature load coefficient is obtained according to the actual temperature difference and a preset temperature difference comparison reference; and the temperature load is obtained The coefficient and the preset cooling capacity of the main engine and the cooling capacity of the terminal device obtain the internal machine load factor.
  • the following steps are further implemented: obtaining a corresponding set outlet water temperature according to the internal machine load ratio and a preset load ratio-outlet water temperature correspondence relationship.
  • the following steps are also implemented: controlling the outlet water temperature according to the set outlet water temperature until the average value of the difference between the ambient temperature data of the area where the end device is located and the user-set temperature reaches 0 degrees Celsius . Adjust the set water temperature according to the temperature change rate of the area with the largest difference between the ambient temperature data and the user-set temperature, until the maximum difference between the ambient temperature data and the user-set temperature reaches 0 degrees Celsius.
  • the following steps are also implemented: when the temperature change rate of the area with the largest difference between the ambient temperature data and the user-set temperature is greater than or equal to 0 degrees Celsius per minute, the water temperature is set Down. When the temperature change rate of the area with the largest difference between the ambient temperature data and the temperature set by the user is less than 0 degrees Celsius per minute, the set water temperature is adjusted upward or maintained unchanged.
  • the following steps are further implemented: obtaining a corresponding change amplitude according to the temperature change rate and a preset down-regulation change range, and adjusting the set outlet water temperature according to the obtained change amplitude.
  • the following steps are also implemented: when the temperature change rate is in a preset maintenance change range, controlling the set water temperature to remain unchanged; when the temperature change rate is in a preset upward change In the range, the control sets the water temperature to be adjusted to maintain the lower limit value of the change range greater than the upper limit value of the increase change range.
  • Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory.
  • Volatile memory can include random access memory (RAM) or external cache memory.
  • RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Synchlink DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
  • SRAM static RAM
  • DRAM dynamic RAM
  • SDRAM synchronous DRAM
  • DDRSDRAM dual data rate SDRAM
  • ESDRAM enhanced SDRAM
  • SLDRAM synchronous chain Synchlink DRAM
  • Rambus direct RAM
  • DRAM direct memory bus dynamic RAM
  • RDRAM memory bus dynamic RAM

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Abstract

L'invention concerne un appareil et un procédé de commande de fonctionnement pour une unité à division multiple d'eau, ainsi qu'un support et un système de climatisation à division multiple d'eau. Le procédé consiste à : acquérir des données de température environnementale collectées dans une zone dans laquelle un appareil de traitement final est situé; obtenir une vitesse de charge d'unité interne d'une unité à division multiple d'eau en fonction des données de température environnementales et obtenir une température d'eau de sortie définie en fonction de la vitesse de charge d'unité interne; et commander la température d'eau de l'eau de sortie en fonction de la température d'eau de sortie définie. Une vitesse de charge d'unité interne d'une unité à division multiple d'eau est calculée au moyen des données de température environnementales détectées d'une zone dans laquelle un appareil de traitement final est situé et une température d'eau de sortie définie est déterminée en fonction de la vitesse de charge d'unité interne afin de commander la température d'eau de l'eau de sortie, réalisant ainsi une commande de liaison d'une unité et de l'appareil de traitement final; et une température d'eau est régulée en fonction d'une charge réelle, réduisant ainsi la perte d'énergie. La fiabilité de commande d'unité est en outre améliorée, tandis que le problème d'asynchronisme provoqué par une commande indépendante d'un hôte d'une unité de refroidissement d'eau et d'un appareil de traitement final classiques est résolu.
PCT/CN2018/120632 2018-09-25 2018-12-12 Appareil et procédé de commande de fonctionnement pour unité à division multiple d'eau et support et système de climatisation à division multiple d'eau WO2020062598A1 (fr)

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CN201811113464.8A CN109237713B (zh) 2018-09-25 2018-09-25 水多联机组运行控制方法、装置、介质和水多联空调系统
CN201811113464.8 2018-09-25

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CN111059701B (zh) * 2019-11-25 2020-11-06 珠海格力电器股份有限公司 节能控制方法、装置、存储介质及水多联系统
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