CN101975418A - Temperature difference type flow control system of secondary heating pipe network and control method thereof - Google Patents

Temperature difference type flow control system of secondary heating pipe network and control method thereof Download PDF

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Publication number
CN101975418A
CN101975418A CN 201010560200 CN201010560200A CN101975418A CN 101975418 A CN101975418 A CN 101975418A CN 201010560200 CN201010560200 CN 201010560200 CN 201010560200 A CN201010560200 A CN 201010560200A CN 101975418 A CN101975418 A CN 101975418A
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China
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return water
pressure
control module
temperature
collector
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CN 201010560200
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Chinese (zh)
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CN101975418B (en
Inventor
赵长春
王守金
崔建华
包英
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北京华通兴远供热节能技术有限公司
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Publication of CN101975418A publication Critical patent/CN101975418A/en
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Publication of CN101975418B publication Critical patent/CN101975418B/en

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Abstract

The invention provides a temperature difference type flow control system of a secondary heating pipe network, comprising an outdoor temperature collector, a secondary return water pressure sensor, secondary supplied and return water temperature collectors, a transducer, a secondary circulating pump and a controller. The outdoor temperature collector, the secondary return water pressure sensor, the secondary supplied water temperature collector, the secondary return water temperature collector and the transducer are respectively connected with the controller; the transducer is connected with the secondary circulating pump; the controller is used for collecting various parameters such as outdoor temperature, secondary return water pressure and secondary supplied and return water temperatures, and outputting corresponding frequency-conversion regulating signals to the transducer which carries out the frequency-conversion regulating to the secondary circulating pump. The invention also provides a control method of the system. The invention has the advantages and the positive effects of: regulating the circulating pump operating parameters in real time according to the heat demand of the individual metering users and the ordinary users and the outdoor temperature, confirming the reasonable operating pressure and the operating temperature difference, and ensuring the stable system pressure and saving the electric energy consumption through regulating the circulating pump operating frequency.

Description

Secondary heating network thermal type flow control system and control method thereof

Technical field

The present invention relates to heating network control system and method, particularly a kind of secondary heating network thermal type flow control system and control method thereof.

Background technology

Supply the secondary cycle pump control system between traditional heating network, type selecting to the secondary cycle pump is carried out according to the design load, because when actual motion, the running time that can reach the design load is very short, most of times all are in the running status less than the design load.At present owing to can't regulate to the power output of water pump, so in a heating season nearly 70% time all be in the running status that wastes energy.Particularly to the user of household metering, because user's different in kind is also different with heat demand, cause 95% time actual load all to be in less than the design load condition, energy dissipation is very serious.Meanwhile, initiatively open and close the by-pass valve control of household metering the user, the stability of heating system also will be on the hazard, and pressure changes frequent, at this moment, adopt artificial adjusting can't satisfy the requirement of system change in system, cause safe hidden danger.

Summary of the invention

The objective of the invention is to overcome above-mentioned defective, provide a kind of in the heating network of household metering, can regulate automatically in real time with system pressure and temperature, it is stable to keep-up pressure, the reasonable safe operation of safeguards system realizes energy-saving and cost-reducing secondary heating network thermal type flow control system and control method thereof.

For achieving the above object, secondary heating network thermal type flow control system provided by the invention, comprise the secondary cycle pump that is installed in the heating network, secondary pressure of return water sensor and secondary supply and return water temperature collector, and controller, also comprise outdoor temperature collector and frequency converter, described outdoor temperature collector, secondary pressure of return water sensor, the secondary water-supply Temperature sampler, secondary return water temperature capturing device, frequency converter links to each other with described controller respectively, described frequency converter links to each other with described secondary cycle pump, described controller is gathered outdoor temperature, secondary pressure of return water and secondary supply, each parameter of return water temperature, and with the outdoor temperature of gathering, secondary pressure of return water and secondary supply, each parameter of return water temperature is respectively with after setting value is separately compared, export corresponding variable frequency adjustment signal to described frequency converter, described secondary cycle pump is carried out variable frequency adjustment by described frequency converter.

Secondary heating network thermal type flow control system of the present invention, wherein said controller comprises main control module, device control module, data processing module and communication module, described main control module links to each other respectively with data processing module with described device control module by communication module, and described main control module, device control module and data processing module link to each other with described frequency converter respectively.

Secondary heating network thermal type flow control system of the present invention, wherein said data processing module links to each other respectively with described outdoor temperature collector, secondary pressure of return water sensor, secondary water-supply Temperature sampler and secondary return water temperature capturing device.

For achieving the above object, a kind of control method that adopts described thermal type flow control system provided by the invention, carry out following steps:

(1) system powers on, and whether the communication that the main control module detects main control module and device control module and data processing module is normal, as undesired then alarm failure; As normally, carry out next step;

Whether the measuring point that (2) main control module checkout equipment control module and data processing module are connect is normal, as undesired then alarm failure; As normally, carry out next step;

(3) main control module reads outdoor temperature collector, secondary pressure of return water sensor, secondary water-supply Temperature sampler and secondary return water temperature capturing device data, and real-time video data;

(4) whether main control module judges the pressure of return water sensor values at preset range, as at preset range, carries out for (5) step; As not existing, then control the running frequency of frequency converter as control signal by the numerical value of pressure of return water sensor;

(5) main control module reads the pressure of return water sensor values in real time and preset range compares, when the pressure of return water sensor values remained in the preset range after a period of time, switch to the running frequency of controlling frequency converter with the difference of supply water temperature collector and return water temperature capturing device as control signal;

(6) main control module detects the numerical value of pressure of return water collector in real time, causes that as the adjustment of frequency converter the numerical value of pressure of return water collector exceeds preset range, then with the numerical value of pressure of return water collector again as the operation of control signal control frequency converter; As do not exceed preset range, carry out next step;

(7) after system under the temperature signal control is stable, drop into the weather compensated curve, system changes the real-time temperature difference of adjusting according to outdoor temperature and sets, thereby regulates the operation of circulating pump;

(8) system keeps operation, and is out of service up to heating network secondary cycle pump.

The advantage and the good effect of secondary heating network thermal type flow control system of the present invention and control method thereof are: because at original secondary pressure of return water sensor, be provided with outdoor temperature collector and frequency converter in the control system that secondary water-supply Temperature sampler and secondary return water temperature capturing device and controller constitute, constituted new, can be according to the household metering user, domestic consumer adjusts pump operating cycle parameter control system in real time with heat demand and outdoor temperature, by to outdoor temperature, pressure of return water and confession, the collection of return water temperature and analysis, determine the rational operating pressure and the operation temperature difference, thereby by adjusting the pump operating cycle frequency, the safeguards system pressure stability, simultaneously, saved power consumption.Its operational mode is particularly suitable for the frequent systems of user's heat changes in demand such as household metering pattern.

Be elaborated with reference to accompanying drawing below in conjunction with embodiment.

Description of drawings

Fig. 1 is the block diagram of secondary heating network thermal type flow control system of the present invention;

Fig. 2 is the schematic diagram of signals collecting in the secondary heating network thermal type flow control system of the present invention;

Fig. 3 is the structural representation of secondary heating network thermal type flow control system middle controller of the present invention.

The specific embodiment

With reference to Fig. 1, secondary heating network thermal type flow control system provided by the invention, comprise the secondary cycle pump B, secondary pressure of return water sensor and the secondary supply and return water temperature collector that are installed in the heating network, and controller C, also comprise outdoor temperature collector TA3 and frequency converter A V.Outdoor temperature collector TA3, secondary pressure of return water sensor PA1, secondary water-supply Temperature sampler TA1, secondary return water temperature capturing device TA2, frequency converter A V links to each other with controller C respectively, frequency converter A V links to each other with secondary cycle pump B, controller C gathers outdoor temperature, secondary pressure of return water and secondary supply, each parameter of return water temperature, and will gather outdoor temperature, secondary pressure of return water and secondary supply, each parameter of return water temperature is respectively with after setting value is separately compared, export corresponding variable frequency adjustment signal to described frequency converter A V, secondary cycle pump B is carried out variable frequency adjustment by frequency converter A V.

In the embodiment of secondary heating network thermal type flow control system of the present invention, in conjunction with Fig. 2 and Fig. 3, controller C comprises that main control module MC, device control module EC, data processing module DAU and communication module CC. main control module MC link to each other respectively with data processing module DAU with device control module EC by communication module CC, and main control module MC, device control module EC link to each other with frequency converter A V respectively with data processing module DAU.Wherein data processing module DAU links to each other respectively with outdoor temperature collector TA3, secondary pressure of return water sensor PA1, secondary water-supply Temperature sampler TA1 and secondary return water temperature capturing device TA2.

The following describes the course of work of secondary heating network thermal type flow control system of the present invention.

After secondary heating network thermal type flow control system of the present invention powered on, whether the communication that main control module MC at first detects main control module MC and device control module EC and data processing module DAU was normal, as undesired then alarm failure.As normally, then whether the measuring point that connect of checkout equipment control module EC and data processing module DAU is normal, as undesired then alarm failure.As normally, main control module MC then reads corresponding data, and shows real time data by main control module MC.

The MC of main control module subsequently judges that at first whether pressure of return water sensor PA1 numerical value is at preset range, as not existing, then control the running frequency of frequency converter A V as control signal by the numerical value of pressure of return water sensor PA1, and read pressure of return water sensor PA1 numerical value in real time and preset range compares, when pressure of return water sensor PA1 numerical value remained in the preset range after a period of time, switch to the running frequency of controlling frequency converter A V with the difference of supply water temperature collector TA1 and return water temperature capturing device TA2 as control signal, detect the numerical value of supply water temperature collector TA1 simultaneously, adjustment as frequency converter A V causes that the numerical value of supply water temperature collector TA1 exceeds preset range, then controls the operation of frequency converter A V again as control signal with the numerical value of supply water temperature collector TA1.

Be in operation, the numerical value of Temperature sampler TA3 presets the weather compensated curve outside the real-time sensing chamber of main control module MC in main control module MC, and this compensated curve can be followed the tracks of outdoor temperature collector TA3 and adjust automatically.After system under the temperature signal control is stable, drop into the weather compensated curve, system changes the real-time temperature difference of adjusting according to outdoor temperature and sets, thereby regulates the operation of circulating pump B.

The control method of secondary heating network thermal type flow control system provided by the invention, carry out following steps:

(1) system powers on, and whether the communication that main control module MC detects main control module MC and device control module EC and data processing module DAU is normal, as undesired then alarm failure; As normally, carry out next step;

Whether the measuring point that (2) main control module MC checkout equipment control module EC and data processing module DAU are connect is normal, as undesired then alarm failure; As normally, carry out next step;

(3) main control module MC reads outdoor temperature collector TA3, secondary pressure of return water sensor PA1, secondary water-supply Temperature sampler TA1 and secondary return water temperature capturing device TA2 data, and real-time video data;

(4) whether main control module MC judges pressure of return water sensor PA1 numerical value at preset range, as at preset range, carries out for (5) step; As not existing, then control the running frequency of frequency converter A V as control signal by the numerical value of pressure of return water sensor PA1;

(5) main control module MC reads pressure of return water sensor PA1 numerical value in real time and preset range compares, when pressure of return water sensor PA1 numerical value remained in the preset range after a period of time, switch to the running frequency of controlling frequency converter A V with the difference of supply water temperature collector TA1 and return water temperature capturing device TA2 as control signal;

(6) main control module MC detects the numerical value of pressure of return water collector PA1 in real time, adjustment as frequency converter A V causes that the numerical value of pressure of return water collector PA1 exceeds preset range, then controls the operation of frequency converter A V again as control signal with the numerical value of pressure of return water collector PA1; As do not exceed preset range, carry out next step;

(7) after system under the temperature signal control is stable, drop into the weather compensated curve, system changes the real-time temperature difference of adjusting according to outdoor temperature and sets, thereby regulates the operation of circulating pump B;

(8) system keeps operation, and is out of service up to heating network secondary cycle pump.

Integrate, secondary heating network thermal type flow control system provided by the invention changes adjusting in real time by pressure acquisition device real-time monitoring system pressure, make system pressure be stabilized in system can the scope of safe operation in.Simultaneously, gather the outdoor temperature situation of change in real time, and adjust the setting of pressure of return water collector, system loading and customer charge demand are complementary according to the data of outdoor temperature by the outdoor temperature collector.On this basis, by analyzing the data that the supply and return water temperature collector sends, determine the reasonable frequency of water pump operation, instruction is adjusted in issue, adjusted the water pump operation frequency, realize the output of control power, reduce the function of power consumption, thereby reach energy-conservation, high-quality heating operation.

Embodiment recited above is described preferred implementation of the present invention; be not that design of the present invention and scope are limited; do not breaking away under the design prerequisite of the present invention; common engineers and technicians make technical scheme of the present invention in this area various modification and improvement; all should fall into protection scope of the present invention; the technology contents that the present invention asks for protection all is documented in claims.

Claims (4)

1. secondary heating network thermal type flow control system, comprise the secondary cycle pump (B) that is installed in the heating network, secondary pressure of return water sensor and secondary supply and return water temperature collector, and controller (C), it is characterized in that: also comprise outdoor temperature collector (TA3) and frequency converter (AV), described outdoor temperature collector (TA3), secondary pressure of return water sensor (PA1), secondary water-supply Temperature sampler (TA1), secondary return water temperature capturing device (TA2), frequency converter (AV) links to each other with described controller (C) respectively, described frequency converter (AV) links to each other with described secondary cycle pump (B), described controller (C) is gathered outdoor temperature, secondary pressure of return water and secondary supply, each parameter of return water temperature, and with the outdoor temperature of gathering, secondary pressure of return water and secondary supply, each parameter of return water temperature is respectively with after setting value is separately compared, export corresponding variable frequency adjustment signal to described frequency converter (AV), described secondary cycle pump (B) is carried out variable frequency adjustment by described frequency converter (AV).
2. secondary heating network thermal type flow control system according to claim 1, it is characterized in that: wherein said controller (C) comprises main control module (MC), device control module (EC), data processing module (DAU) and communication module (CC), described main control module (MC) links to each other respectively with data processing module (DAU) with described device control module (EC) by communication module (CC), and described main control module (MC), device control module (EC) and data processing module (DAU) link to each other with described frequency converter (AV) respectively.
3. secondary heating network thermal type flow control system according to claim 1 and 2 is characterized in that: wherein said data processing module (DAU) links to each other respectively with described outdoor temperature collector (TA3), secondary pressure of return water sensor (PA1), secondary water-supply Temperature sampler (TA1) and secondary return water temperature capturing device (TA2).
4. control method that adopts claim 1 or 2 or 3 described thermal type flow control systems is characterized in that: this method is carried out following steps:
(1) system powers on, and whether main control module (MC) detects main control module (MC) normal with the communication of device control module (EC) and data processing module (DAU), as undesired then alarm failure; As normally, carry out next step;
Whether the measuring point that (2) main control module (MC) checkout equipment control module (EC) and data processing module (DAU) are connect is normal, as undesired then alarm failure; As normally, carry out next step;
(3) main control module (MC) reads outdoor temperature collector (TA3), secondary pressure of return water sensor (PA1), secondary water-supply Temperature sampler (TA1) and secondary return water temperature capturing device (TA2) data, and real-time video data;
(4) whether main control module (MC) judges pressure of return water sensor (PA1) numerical value at preset range, as at preset range, carries out for (5) step; As not existing, then control the running frequency of frequency converter (AV) as control signal by the numerical value of pressure of return water sensor (PA1);
(5) main control module (MC) reads pressure of return water sensor (PA1) numerical value in real time and preset range compares, when pressure of return water sensor (PA1) numerical value remained in the preset range after a period of time, switch to the running frequency of controlling frequency converter (AV) with the supply water temperature collector (TA1) and the difference of return water temperature capturing device (TA2) as control signal;
(6) main control module (MC) detects the numerical value of pressure of return water collector PA1 in real time, adjustment as frequency converter (AV) causes that the numerical value of pressure of return water collector (PA1) exceeds preset range, then controls the operation of frequency converter (AV) again as control signal with the numerical value of pressure of return water collector (PA1); As do not exceed preset range, carry out next step;
(7) after system under the temperature signal control is stable, drop into the weather compensated curve, system changes the real-time temperature difference of adjusting according to outdoor temperature and sets, thereby regulates the operation of circulating pump (B);
(8) system keeps operation, and is out of service up to heating network secondary cycle pump.
CN2010105602004A 2010-11-25 2010-11-25 Temperature difference type flow control system of secondary heating pipe network and control method thereof CN101975418B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102661672A (en) * 2012-05-07 2012-09-12 上海斯普莱力热能技术有限公司 Energy-saving plate heat exchanger unit and control method thereof
CN102748802A (en) * 2012-04-27 2012-10-24 太原大四方节能环保有限公司 Variable-differential-pressure energy-saving device of circulating pump
CN103398417A (en) * 2013-08-06 2013-11-20 刘振 Heat metering control system based on indoor and outdoor temperature differences and heat metering proportional calculation and control method
CN104141982A (en) * 2014-07-22 2014-11-12 山西潞安环保能源开发股份有限公司常村煤矿 Heat supply network heat balance control method and system
CN104634023A (en) * 2014-12-08 2015-05-20 中国船舶工业系统工程研究院 Fluid flow control system and variable flow control method
CN104470333B (en) * 2014-12-08 2016-10-19 中国船舶工业系统工程研究院 A kind of compatible type aircraft liquid cool equipment
CN109737485A (en) * 2018-12-15 2019-05-10 阿诗丹顿燃具有限公司 Combustion type heating system of water heater and its control device and method

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CN104470333B (en) * 2014-12-08 2016-10-19 中国船舶工业系统工程研究院 A kind of compatible type aircraft liquid cool equipment
CN109737485A (en) * 2018-12-15 2019-05-10 阿诗丹顿燃具有限公司 Combustion type heating system of water heater and its control device and method

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