CN113405153A - Control method and device for centralized cooling/heating system - Google Patents

Control method and device for centralized cooling/heating system Download PDF

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Publication number
CN113405153A
CN113405153A CN202110780392.8A CN202110780392A CN113405153A CN 113405153 A CN113405153 A CN 113405153A CN 202110780392 A CN202110780392 A CN 202110780392A CN 113405153 A CN113405153 A CN 113405153A
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terminal
heating system
centralized cooling
required power
cooling
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谷振宇
谷泽竑
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Priority to PCT/CN2022/104625 priority patent/WO2023280306A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—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
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The invention discloses a control method and a device of a centralized cooling/heating systemiThe centralized cooling/heating system comprises one or more terminals i; the required power P of each terminal iiAnd after summing, obtaining the current total required power P by adding the loss of the pipe network, and controlling the centralized cooling/heating system to do work aiming at the current refrigerating or heating working condition by taking the total required power P as a target. The invention can effectively reduce the energy waste problem of fixed power acting, and can realize instantaneous response compared with the constant-temperature closed-loop control mode of outputting working medium based on the temperature difference of the working medium output and returned, thereby effectively saving the energy waste during the transition period of the constant-temperature closed-loop control mode, and having energy-saving effectGood fruit and good universality.

Description

Control method and device for centralized cooling/heating system
Technical Field
The invention relates to the field of heating ventilation, in particular to a control method and a control device of a centralized cooling/heating system.
Background
In the field of heating ventilation, for various centralized cooling/heating systems including central air-conditioning and central heating systems, a specific working medium (such as freon or other refrigerants, water, air, etc.) is generally used as a medium, and a loop is formed between a main end system and each end through an output pipeline and a return pipeline so as to realize cooling/heating by cooling/heating the working medium.
At present, for the control of a centralized cooling/heating system, the most traditional mode is fixed power work, that is, no matter the working state of the tail end, the total system only needs to be started to work according to the fixed power, and this mode can cause two problems, on one hand, the energy waste of the total system can be caused, and on the other hand, the temperature of the working medium is easy to fluctuate due to the variation difference between the fixed power work and the tail end consumption. However, because the lower end of the centralized cooling/warming system is generally rarely actively turned off, for example, some centralized cooling/warming systems need normal payment for the end whether to be turned on or not, the user at the end may not go to actively turn off the end, and for the forgotten reason, the fixed power work is generally available.
In consideration of the problem of energy waste caused by fixed power work, some centralized cooling/heating systems introduce a new control method on the basis, namely, the constant-temperature closed-loop control of the output working medium is realized based on the medium temperature difference of output and backflow, the method can effectively reduce the energy waste problem of fixed power acting, but the method still has an optimization space, and because the lower end of the centralized cooling/warming system is generally rarely actively shut down, especially when the system is used by many users, the amount of circulating medium increases, the specific heat capacity rises along with the increase of the specific heat capacity, when the load is reduced, the temperature difference of output and return media changes slowly, the system does not work with the actual requirement, the constant-temperature closed-loop control is difficult to exert advantages, energy waste is caused, and the experience of a user is influenced due to the fact that the user side is too cold and too hot.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in view of the above problems in the prior art, the present invention provides a method and an apparatus for controlling a centralized cooling/heating system, which uses the required power P of each terminal iiThe summation is added with the pipe network loss to obtain the current total required power P, and the total required power P is used as a target to control the centralized cooling/heating system to aim at the currentRefrigeration or heating operating mode do work, can effectively reduce the extravagant problem of the energy of fixed power doing work, and relative to the constant temperature closed-loop control mode based on output, the working medium difference in temperature of backward flow to output working medium, its instantaneous response can be accomplished to effectively practice thrift the energy waste during constant temperature closed-loop control mode transition, have energy-conserving effectual, the good advantage of commonality.
In order to solve the technical problems, the invention adopts the technical scheme that:
a control method of a centralized cooling/heating system, comprising:
1) acquiring required power P corresponding to each terminal i in the centralized cooling/heating systemiThe centralized cooling/heating system comprises one or more terminals i;
2) the required power P of each terminal iiAnd after summing, obtaining the current total required power P by adding the loss of the pipe network, and controlling the centralized cooling/heating system to do work aiming at the current refrigerating or heating working condition by taking the total required power P as a target.
Optionally, step 1) includes obtaining the working state F of each terminal i respectivelyiAccording to the operating state FiDetermining the required power P corresponding to the terminal ii。
Optionally, the operating state of each end FiThe power control method comprises the steps of determining required power P corresponding to a terminal i, wherein the required power P is a normal starting or energy-saving state, the energy-saving state is a closing state or a heat preservation state, andiif the working state F of the terminal iiFor the energy saving state, the required power P of the terminal i is determinediThe preset power corresponding to the energy-saving state; if the operating state of the terminal i is FiFor normal opening, determining the required power P of the terminal iiPower P corresponding to the current working condition of the terminal ii0。
Optionally, the power P corresponding to the current working condition of the terminal ii0The determining step includes: detecting the current environment temperature and the parameter setting of the current working condition of the terminal i, wherein the parameter setting of the current working condition of the terminal i comprises one or more of temperature, air volume and performance mode, and the parameter setting is carried out according to the environment temperature and the current working condition of the terminal iInquiring a preset power mapping table by the parameter of the current working condition of the terminal i to obtain the power P corresponding to the current working condition of the terminal ii0The power mapping table comprises parameters of different environmental temperatures and current working conditions of the terminal i and power P corresponding to the terminal ii0A mapping between; or acquiring the measured power P of the cold and heat meter corresponding to the terminal i at the current momenti0。
Optionally, the required power P corresponding to each terminal i is determined in step 1)iMeans that the required power P of the terminal i transmitted by the terminal control unit of each terminal i is receivedi。
Optionally, the calculation function expression of the total required power P in step 2) is:
Figure BDA0003156549850000021
in the above formula, λiIs the weight coefficient of the terminal i, PiThe required power of a terminal i, n is the total number of terminals, lambda is the loss coefficient of the pipe network, and P issLoss of the pipe network; and the weight coefficient lambda of any terminal iiComprises the following steps: detecting output working medium temperature T of centralized cooling/heating systemoutThe current measured temperature T of the terminal iiThe temperature difference is obtained, and the weight coefficient lambda of the tail end i is obtained by inquiring a preset weight coefficient table according to the temperature difference and the pipe network structure parameter of the tail end iiThe preset weight coefficient table comprises pipe network structure parameters of different temperature differences and tail ends i and a weight coefficient lambda of the tail ends iiThe pipe network structure parameters of the terminal i comprise one or more of pipe network length, pipe network pipe diameter, pipe network volume, pipe network material and pipe network heat insulation material performance parameters.
Optionally, the terminal control unit of each terminal is further included for automatically controlling the working state F of each terminaliThe steps of (1): the terminal control unit detects whether the terminal corresponding area has no user and the working state F of the terminali(ii) a If the corresponding area of the terminal has no user, the working state of the terminal FiTo open, the end is automatically closed and the end is workedState FiAnd setting the terminal control unit to be in an energy-saving state, wherein the step of detecting whether the terminal corresponding area is free of users refers to the step of detecting a user-free state mark and judging whether the terminal corresponding area is free of users according to the user-free state mark, the user-free state mark is used for carrying out state modification on the terminal control unit based on a detection signal of an external sensor, and the sensor comprises one or more of an RFID card reader, a trigger button and a WiFi probe.
In addition, the present invention also provides a control device of a centralized cooling/heating system, which comprises a microprocessor and a memory connected with each other, and is characterized in that the microprocessor is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
Further, the present invention also provides a computer-readable storage medium having stored therein a computer program programmed or configured to execute the control method of the centralized cooling/heating system.
In addition, the invention also provides a control device of the centralized cooling/heating system, which comprises a master control unit and a plurality of terminal control units corresponding to the terminals one by one, wherein the master control unit is connected with each terminal control unit through a wired or wireless network, the master control unit is also connected with a total cooling heat meter of the centralized cooling/heating system and each branch cooling heat meter downstream of the total cooling heat meter through a wired or wireless network, the master control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system, or the terminal control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
Compared with the prior art, the invention has the following advantages:
1. the invention determines the required power P of each terminal iiThe summation is carried out, the pipe network loss is added to obtain the current total required power P, the total required power P is used as a target to control the centralized cooling/heating system to do work aiming at the current refrigeration or heating working condition, the problem of energy waste of fixed power doing work can be effectively solved, and the constant-temperature closed-loop control method for outputting the working medium is relatively based on the temperature difference of the output and backflow working mediaIn terms of the formula, the instantaneous response can be realized, so that the energy waste during the transition of the constant-temperature closed-loop control mode is effectively saved, and the energy-saving effect is good.
2. The method of the invention is not only suitable for the centralized cooling/heating system comprising a main end system and a plurality of tail ends, such as a central air conditioner, a centralized heating (heating) system and the like, but also suitable for the centralized cooling/heating system only comprising a single tail end, and has the advantages of good universality and wide application range.
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FIG. 1 is a schematic diagram of a basic flow of a method according to an embodiment of the present invention.
FIG. 2 is a comparison graph of output functions of the method of the present invention and the conventional constant temperature closed-loop control method.
Fig. 3 is a schematic diagram of a basic structure of an apparatus according to an embodiment of the present invention.
Fig. 4 is an installation layout diagram of a total cooling and heating quantity meter and branch cooling and heating quantity meters downstream thereof in the embodiment of the invention.
Detailed Description
The first embodiment is as follows:
as shown in fig. 1, the control method of the centralized cooling/heating system of the present embodiment includes:
1) acquiring required power P corresponding to each terminal i in the centralized cooling/heating systemiThe centralized cooling/heating system comprises a plurality of terminals i;
2) the required power P of each terminal iiAnd after summing, obtaining the current total required power P by adding the loss of the pipe network, and controlling the centralized cooling/heating system to do work aiming at the current refrigerating or heating working condition by taking the total required power P as a target. It should be noted that, when the centralized cooling/heating system is controlled by the method of this embodiment to do work for the current cooling or heating condition, the total power of the cooling or heating is controlled to be the total required power P, and one or more cooling or heating components may be used, or if multiple cooling or heating components are involved, the total required power P needs to be distributed to the multiple cooling or heating components.
FIG. 2 shows the method of the present embodiment and the conventional constant temperature closed-loop controlThe output function of the method is compared with a curve, wherein t is time, and P is actual output power. Referring to fig. 2, in the conventional constant-temperature closed-loop control method, because the constant-temperature closed-loop control on the output working medium is realized by adopting the working medium temperature difference based on output and backflow, and the influence of the working state change corresponding to the terminal i on the backflow working medium temperature difference has a slow process, the output power of the total end system also has a slow decreasing process, for example, t in fig. 20～t1The output power curve is shown as curve a. However, at t0～t1At any moment, the actual output power is actually greater than the actual requirements of each terminal, and because the constant-temperature closed-loop control of the output working medium is realized by the total system based on the temperature difference of the output and backflow working mediums, the power requirement corresponding to the terminal i cannot be obtained, so t is caused0～t1The energy is wasted in time. The control method of the centralized cooling/heating system of the present embodiment uses the required power P of each terminal iiThe current total required power P is obtained by adding the pipe network loss after summation, the total required power P is used as a target to control the centralized cooling/heating system to do work according to the current refrigerating or heating working condition, the curve of the output power is shown as a curve b, and the power requirement corresponding to the tail end i can be obtained, so that instant response can be achieved, the output power matched with the required power can be adjusted, the energy waste during transition of a constant-temperature closed-loop control mode is effectively saved, and the energy-saving control method has the advantage of good energy-saving effect.
As an optional implementation manner, in this embodiment, step 1) includes obtaining the working states F of the respective terminals i respectivelyiAccording to the operating state FiDetermining the required power P corresponding to the terminal ii。
It should be noted that the operating state F of each endiLoad working conditions of different levels can be divided according to needs, and therefore required power mapping of different levels can be achieved. As an alternative embodiment, the working state F of each terminal in this embodimentiThe terminal I is in a normal starting or energy-saving state, the energy-saving state is in a closing state or a heat preservation state, and the requirement corresponding to the terminal I is determinedPower PiIf the working state F of the terminal iiFor the energy saving state, the required power P of the terminal i is determinediA preset power corresponding to the energy-saving state (which can be set according to actual needs); if the operating state of the terminal i is FiFor normal opening, determining the required power P of the terminal iiPower P corresponding to the current working condition of the terminal ii0。
Needless to say, the power P corresponding to the current working condition of the terminal ii0The power supply device can be set according to requirements, for example, a larger constant value can be set, so that requirements of different load working conditions are met, and sufficient power supply is ensured. As an optional implementation manner, in this embodiment, the power P corresponding to the current working condition of the terminal ii0The determining step includes: detecting the current environment temperature and the parameter setting of the current working condition of the terminal i, wherein the parameter setting of the current working condition of the terminal i comprises one or more of temperature, air volume and performance mode, and inquiring a preset power mapping table according to the environment temperature and the parameter setting of the current working condition of the terminal i to obtain the power P corresponding to the current working condition of the terminal ii0The power mapping table comprises parameters of different environmental temperatures and current working conditions of the terminal i and power P corresponding to the terminal ii0Obtaining the power P corresponding to the terminal i through the parameter setting based on the current environment temperature and the current working condition of the terminal ii0The method can realize the fine calculation of the required power and is simple and easy to implement.
In this embodiment, the calculation function expression of the total required power P in step 2) is:
Figure BDA0003156549850000051
in the above formula, λiIs the weight coefficient of the terminal i, PiThe required power of a terminal i, n is the total number of terminals, lambda is the loss coefficient of the pipe network, and P issFor the loss of the pipe network, the output function of the centralized cooling/heating system and the required power P of the tail end i are considered due to the loss and the characteristics of the centralized cooling/heating systemiPipe network loss PsThe non-linear relationship is determined by the weight factor λiThe setting of the loss coefficient lambda can realize the required power P of the tail end iiPipe network loss PsAnd (4) correcting.
It should be noted that the pipe network loss PsThe device can be calibrated to be a constant after being tested in advance, and can also be used for metering by a cold heat meter (a cold and heat meter), and the cold heat meter can directly or indirectly realize power metering corresponding to cold and heat. As shown in fig. 4, the total cooling and heating quantity meter is installed in the output main pipeline, the branch cooling and heating quantity meters are installed in the branches of the main pipeline downstream, the metering powers of the total cooling and heating quantity meter and the branch cooling and heating quantity meters downstream of the total cooling and heating quantity meter are respectively collected, the sum of the detection powers of the branch cooling and heating quantity meters downstream of the total cooling and heating quantity meter is subtracted from the detection power of the total cooling and heating quantity meter, and the pipe network loss P can be obtainedsThis is more accurate and real-time than calibrating to be constant.
The weight coefficient λ is set to beiThe loss coefficient lambda can adopt a constant as required, for example, a constant with a value range of about 1, and can be calculated as required to realize accurate energy conservation. Considering that the larger the temperature difference is, the larger the heat loss is, and the heat loss is also directly related to the pipe network structure parameters (pipe network length, pipe network diameter, pipe network volume, pipe network material, pipe network thermal insulation material performance parameters) of the terminal i, as an optional implementation manner, the weight coefficient λ of any terminal i in this embodiment is set asiComprises the following steps: detecting output working medium temperature T of centralized cooling/heating systemoutThe current measured temperature T of the terminal iiThe temperature difference is obtained, and the weight coefficient lambda of the tail end i is obtained by inquiring a preset weight coefficient table according to the temperature difference and the pipe network structure parameter of the tail end iiThe preset weight coefficient table comprises pipe network structure parameters of different temperature differences and tail ends i and a weight coefficient lambda of the tail ends iiThe pipe network structure parameters of the terminal i comprise one or more of pipe network length, pipe network pipe diameter, pipe network volume, pipe network material and pipe network heat-insulating material performance parameters, and the temperature difference and the terminal i are used for mappingThe mapping of the pipe network structure parameters of the terminal i can improve the required power P of the terminal iiAccurate correction is realized, and accurate energy conservation is realized. In addition, the loss coefficient lambda of the pipe network can also be determined according to the temperature T of the output working medium of the centralized cooling/heating systemoutThe temperature difference between the reflux temperatures and the pipe network structure parameters of the working medium output pipeline query a preset weight coefficient table to obtain the pipe network loss coefficient lambda, and the pipe network loss P can also be realizedsAccurate correction is realized, and accurate energy conservation is realized.
Considering that the lower end of the existing centralized cooling/heating system is seldom actively closed, in order to realize active energy conservation, the embodiment also comprises an end control unit of each end which automatically controls the working state F of each endiThe steps of (1): the terminal control unit detects whether the terminal corresponding area has no user and the working state F of the terminali(ii) a If the corresponding area of the terminal has no user, the working state of the terminal FiTo open, the end is automatically closed and the working state of the end is changed to FiAnd setting the terminal control unit to be in an energy-saving state (a closed state or a heat preservation state), wherein the step of detecting whether the terminal corresponding area is free of users refers to the step of detecting a user-free state mark and judging whether the terminal corresponding area is free of users according to the user-free state mark, the user-free state mark is used for modifying the state of the terminal control unit based on a detection signal of an external sensor, and the sensor comprises one or more of an RFID (radio frequency identification) unit, a trigger button and a WiFi (wireless fidelity) probe. For example, the user-free state mark is not used initially, if any of the RFID identification unit, the trigger button and the WiFi probe is triggered, the user is set to be present, and if any of the RFID identification unit, the trigger button and the WiFi probe is triggered again, the user is set to be absent, and fusion of various sensors can be conveniently achieved through the user-free state mark, so that user detection is more comprehensive and accurate, and the energy-saving effect of the centralized cooling/heating system is more remarkable.
In addition, the present embodiment also provides a control device of a centralized cooling/heating system, which includes a microprocessor and a memory connected to each other, wherein the microprocessor is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
Further, the present embodiment also provides a computer-readable storage medium having stored therein a computer program programmed or configured to execute the control method of the foregoing centralized cooling/heating system.
As shown in fig. 3, the present embodiment further provides a control apparatus of a centralized cooling/heating system, which includes a total control unit and a plurality of end control units corresponding to ends one to one, where the total control unit is connected to each end control unit through a wired or wireless network, and the total control unit is further connected to a total cooling heat meter of the centralized cooling/heating system and each branch cooling heat meter downstream of the total cooling heat meter through a wired or wireless network, respectively, as shown in fig. 4, where the total control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system, or the end control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system. The master control unit is a control system at the front end (master control end) of the control device of the centralized cooling/heating system, and is mainly used for controlling a cooling/heating acting part of the control device of the centralized cooling/heating system to perform work, such as a boiler control system, a host controller of a central air conditioning system, a host controller of a wall-mounted furnace, and the like. In addition, each branch cold and heat meter at the downstream of the total cold and heat meter can be in one-to-one correspondence with each tail end to realize measurement of measured power of each tail end, can also be in one-to-one correspondence with the tail ends and only used for detection of pipe network loss, and can be specifically selected according to engineering practical conditions.
Example two:
the present embodiment is basically the same as the first embodiment, and the main differences are as follows: determining the required power P corresponding to each terminal i in the step 1)iMeans that the required power P of the terminal i transmitted by the terminal control unit of each terminal i is receivedi. The required power P of the terminal i transmitted by the terminal control unit of each terminal iiThe resource consumption of the master control unit can be reduced, and the required power P corresponding to each terminal i in the centralized cooling/heating system can be obtainedi。
In addition, the present embodiment also provides a control device of a centralized cooling/heating system, which includes a microprocessor and a memory connected to each other, wherein the microprocessor is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
Further, the present embodiment also provides a computer-readable storage medium having stored therein a computer program programmed or configured to execute the control method of the foregoing centralized cooling/heating system.
As shown in fig. 3, the present embodiment further provides a control apparatus of a centralized cooling/heating system, which includes a total control unit and a plurality of end control units corresponding to ends one to one, where the total control unit is connected to each end control unit through a wired or wireless network, and the total control unit is further connected to a total cooling heat meter of the centralized cooling/heating system and each branch cooling heat meter downstream of the total cooling heat meter through a wired or wireless network, respectively, as shown in fig. 4, where the total control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system, or the end control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
Example three:
the present embodiment is basically the same as the first embodiment, and the main differences are as follows: the centralized cooling/heating system only contains the extreme case of one terminal i, in which case the required power P of each terminal i is determined in step 2)iThe current total required power P obtained by summing and adding the pipe network loss refers to the required power P of the tail end iiAnd adding the loss of the pipe network to obtain the current total required power P. Correspondingly, the calculation function expression of the total required power P in step 2) is:
P＝iPi+Ps，
in the above formula, λiIs the weight coefficient of the terminal i, PiFor the required power of the terminal i, lambda is the loss coefficient of the pipe network, PsAnd loss of the pipe network.
In addition, the present embodiment also provides a control device of a centralized cooling/heating system, which includes a microprocessor and a memory connected to each other, wherein the microprocessor is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
Further, the present embodiment also provides a computer-readable storage medium having stored therein a computer program programmed or configured to execute the control method of the foregoing centralized cooling/heating system.
As shown in fig. 3, the present embodiment further provides a control apparatus of a centralized cooling/heating system, which includes a total control unit and a plurality of end control units corresponding to ends one to one, where the total control unit is connected to each end control unit through a wired or wireless network, and the total control unit is further connected to a total cooling heat meter of the centralized cooling/heating system and each branch cooling heat meter downstream of the total cooling heat meter through a wired or wireless network, respectively, as shown in fig. 4, where the total control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system, or the end control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
Example four:
the present embodiment is basically the same as the first embodiment, and the main differences are as follows: considering that the parameter adjustment of the terminal operating condition can be quickly reflected to the metering power of the cold and heat meter corresponding to the terminal i, the following power P corresponding to the current operating condition of the terminal i is adopted in the embodimenti0The determination step of (2): obtaining the metering power P of the cold and heat meter corresponding to the terminal i at the current momenti0. In this case, a cold heat meter (cold heat meter) needs to be installed at each end i, which leads to an increase in cost, but the required power is detected more accurately and in real time than by using a power map.
In addition, the present embodiment also provides a control device of a centralized cooling/heating system, which includes a microprocessor and a memory connected to each other, wherein the microprocessor is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
Further, the present embodiment also provides a computer-readable storage medium having stored therein a computer program programmed or configured to execute the control method of the foregoing centralized cooling/heating system.
As shown in fig. 3, the present embodiment further provides a control apparatus of a centralized cooling/heating system, which includes a total control unit and a plurality of end control units corresponding to ends one to one, where the total control unit is connected to each end control unit through a wired or wireless network, and the total control unit is further connected to a total cooling heat meter of the centralized cooling/heating system and each branch cooling heat meter downstream of the total cooling heat meter through a wired or wireless network, respectively, as shown in fig. 4, where the total control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system, or the end control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (10)

1. A control method of a centralized cooling/heating system, comprising:
1) acquiring required power P corresponding to each terminal i in the centralized cooling/heating systemiThe centralized cooling/heating system comprises one or more terminals i;
2) the required power P of each terminal iiAnd after summing, obtaining the current total required power P by adding the loss of the pipe network, and controlling the centralized cooling/heating system to do work aiming at the current refrigerating or heating working condition by taking the total required power P as a target.
2. The control method of a centralized cooling/heating system according to claim 1, wherein the step 1) comprises respectively obtaining the operation status F of each terminal iiAccording to the operating state FiDetermining the required power P corresponding to the terminal ii。
3. The control method of a centralized cooling/heating system as set forth in claim 2, wherein the operation state F of each endiThe power control method comprises the steps of determining required power P corresponding to a terminal i, wherein the required power P is a normal starting or energy-saving state, the energy-saving state is a closing state or a heat preservation state, andiif the working state F of the terminal iiFor the energy saving state, the required power P of the terminal i is determinediThe preset power corresponding to the energy-saving state; if the operating state of the terminal i is FiFor normal opening, determining the required power P of the terminal iiPower P corresponding to the current working condition of the terminal ii0。
4. The control method of a centralized cooling/heating system as set forth in claim 3, wherein the power P corresponding to the current operating condition of the terminal ii0The determining step includes: detecting the current environment temperature and the parameter setting of the current working condition of the terminal i, wherein the parameter setting of the current working condition of the terminal i comprises one or more of temperature, air volume and performance mode, and inquiring a preset power mapping table according to the environment temperature and the parameter setting of the current working condition of the terminal i to obtain the power P corresponding to the current working condition of the terminal ii0The power mapping table comprises parameters of different environmental temperatures and current working conditions of the terminal i and power P corresponding to the terminal ii0A mapping between; or acquiring the measured power P of the cold and heat meter corresponding to the terminal i at the current momenti0。
5. The method for controlling a centralized cooling/heating system as set forth in claim 1, wherein the required power P corresponding to each terminal i is determined in step 1)iMeans that the required power P of the terminal i transmitted by the terminal control unit of each terminal i is receivedi。
6. The control method of a centralized cooling/heating system according to claim 1, wherein the calculation function expression of the total required power P in step 2) is:
Figure FDA0003156549840000011
in the above formula, λiIs the weight coefficient of the terminal i, PiThe required power of a terminal i, n is the total number of terminals, lambda is the loss coefficient of the pipe network, and P issLoss of the pipe network; and the weight coefficient lambda of any terminal iiComprises the following steps: detecting output working medium temperature T of centralized cooling/heating systemoutThe current measured temperature T of the terminal iiThe temperature difference is obtained, and the weight coefficient lambda of the tail end i is obtained by inquiring a preset weight coefficient table according to the temperature difference and the pipe network structure parameter of the tail end iiThe preset weight coefficient table comprises pipe network structure parameters of different temperature differences and tail ends i and a weight coefficient lambda of the tail ends iiThe pipe network structure parameters of the terminal i comprise one or more of pipe network length, pipe network pipe diameter, pipe network volume, pipe network material and pipe network heat insulation material performance parameters.
7. The method for controlling a centralized cooling/heating system as set forth in claim 2, further comprising the step of the terminal control unit of each terminal automatically controlling the operation state F of each terminaliThe steps of (1): the terminal control unit detects whether the terminal corresponding area has no user and the working state F of the terminali(ii) a If the corresponding area of the terminal has no user, the working state of the terminal FiAnd if the terminal is turned on, automatically turning off the terminal, and setting the working state Fi of the terminal to be an energy-saving state, wherein the step of detecting whether the region corresponding to the terminal is free of users refers to the step of detecting a user-free state mark and judging whether the region corresponding to the terminal is free of users according to the user-free state mark, the user-free state mark is used for modifying the state of the terminal control unit based on a detection signal of an external sensor, and the sensor comprises one or more of an RFID (radio frequency identification) unit, a trigger button and a WiFi (wireless fidelity) probe.
8. A control apparatus of a centralized cooling/heating system comprising a microprocessor and a memory connected to each other, wherein the microprocessor is programmed or configured to perform the steps of the control method of the centralized cooling/heating system according to any one of claims 1 to 7.
9. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, which is programmed or configured to execute a control method of a centralized cooling/heating system according to any one of claims 1 to 7.
10. A control device of a centralized cooling/heating system comprises a master control unit and a plurality of terminal control units which correspond to terminals one by one, wherein the master control unit is connected with each terminal control unit through a wired or wireless network, the master control unit is further connected with a total cooling heat meter of the centralized cooling/heating system and each branch cooling heat meter downstream of the total cooling heat meter through a wired or wireless network, the master control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system according to any one of claims 1-6, or the terminal control unit is programmed or configured to execute the steps of the control method of the centralized cooling/heating system according to claim 7.
CN202110780392.8A 2021-07-09 2021-07-09 Control method and device for centralized cooling/heating system Pending CN113405153A (en)

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