CN105737284A - Pipe network balance distribution and variable flow control method of air conditioner water system - Google Patents
Pipe network balance distribution and variable flow control method of air conditioner water system Download PDFInfo
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- CN105737284A CN105737284A CN201610117139.3A CN201610117139A CN105737284A CN 105737284 A CN105737284 A CN 105737284A CN 201610117139 A CN201610117139 A CN 201610117139A CN 105737284 A CN105737284 A CN 105737284A
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a pipe network balance distribution and variable flow control method of an air conditioner water system. Multiple air handling unit branches connected in parallel are arranged between a water separator and a water collector. The method is characterized in that each air handling unit branch has an air handling unit; the air handling units are provided with air feeding temperature sensors; first heat meters are arranged on water inlet pipes of the air handling units; first electric adjusting valves are arranged on water outlet pipes; output ends of the air feeding temperature sensors, output ends of the first heat meters and input ends of the first electric adjusting valves are connected with air handling unit controllers; and the air handling unit controllers adjust the openness of the first electric adjusting valves according to the air feeding temperature change of the air handling units and the reading numbers of the first heat meters.
Description
Technical field
The present invention relates to a kind of air-conditioner water system pipe network equilibrium assignmen and flow-changing control method.
Background technology
The task of building heating ventilation air-conditioning system is with minimum operating cost, provides the user comfortable room climate.All running under partial load condition due to the air conditioning system most of the time, the system discharge most of the time is below design discharge, and therefore, air-conditioner water system mostly adopts efficient, energy-conservation variable flow system.In the running of variable flow system, the flow of each branch road (branch's loop) is as the change of load and changes, but the waterpower between each parallel branch is interactional, the hydraulic disturbance of one branch road can be delivered in other loops, cause air-conditioner water system hot water or cold water's assignment of traffic unbalance, some bypass flow is superfluous, and some bypass flow is not enough.In order to take into account the air-conditioning effect in unbalance region, local, air-conditioner water system has to work under " big flow " state, causes that system energy consumption increase, the energy saving space are limited.
In prior art, air-conditioner water system mostly adopts dynamic differential pressure balancing valve to maintain the dynamic hydraulic equilibrium of system.Its mechanism of action is the pressure reduction of constant controlled pipeline.But, direct relation is not had between load and the pressure reduction of air conditioning system, based on the dynamic hydraulic equilibrium control method that pressure reduction is constant, can not realizing the balance of each bypass flow distribution, the maximum stream flow of the simply restriction branch road that it can be accomplished, to prevent flow excessive.
Summary of the invention
The goal of the invention of the present invention is in that to provide a kind of air-conditioner water system pipe network equilibrium assignmen and flow-changing control method, it is possible to really realizes the distribution according to need of each bypass flow, is effectively improved the Operating ettectiveness of air-conditioner water system.
Realize the technical scheme of the object of the invention:
A kind of air-conditioner water system pipe network equilibrium assignmen and flow-changing control method, the air-treatment unit branch road of multiple parallel connection it is provided with between water knockout drum and water collector, it is characterized in that: each air-treatment unit branch road has an air-treatment unit, air-treatment unit is provided with wind pushing temperature sensor, air-treatment unit water inlet pipe place is provided with the first calorimeter, water outlet pipe part is provided with the first electric control valve, the outfan of wind pushing temperature sensor, the first calorimeter outfan, the first electric control valve input termination air processing machine group controller；The change according to air-treatment unit wind pushing temperature of the air-treatment generator set controller, and in conjunction with the reading of the first calorimeter, regulate the aperture of the first electric control valve.
Fan coil branch road it is provided with between water knockout drum and water collector, described fan coil props up the fan coil routeing multiple parallel connections and constitutes, the outfall sewer of fan coil branch road is provided with the second electric control valve, the water inlet manifold of fan coil branch road is provided with the second calorimeter, the second calorimeter outfan, the second electric control valve input adapter net balance vari-able flow control device；Fan coil water outlet pipe part is provided with electric switching valve, and the input of electric switching valve connects fan coil controller；Fan coil controller balances vari-able flow control device communication with pipe network and is connected.
Electric switching valve number that pipe network balance vari-able flow control device is opened according to fan coil branch road and corresponding fan coil, calculate this branch road actual demand flow, control the aperture of this branch road the second electric control valve so that the actual flow that the second calorimeter reads tends to requirements.
Pipeline between water knockout drum and water collector is provided with differential pressure pickup, differential pressure pickup outfan adapter net balance vari-able flow control device, pipe network balance vari-able flow control device is connected with air-treatment generator set controller communication, the converter of pipe network balance vari-able flow control device output termination air-conditioner water system water pump.
Air-conditioner water system water pump, according to the first motorized adjustment valve opening on air-treatment unit branch road, the second motorized adjustment valve opening on fan coil branch road, is controlled by pipe network balance vari-able flow control device.
In air-treatment unit branch road, air-treatment unit is provided with the first return air temperature sensor, and the output termination air processing machine group controller of the first return air temperature sensor, air-treatment generator set controller outfan connects the converter of air-treatment unit blower fan.
Air-treatment unit blower fan is carried out VFC according to the change of air-treatment unit return air temperature by air-treatment generator set controller.
In fan coil branch road, fan coil is provided with the second return air temperature sensor, and the second return air temperature sensor outfan connects fan coil controller；Fan coil controller outfan is given a dinner for a visitor from afar the third gear speed regulator of coiler blower fan.
Fan coil blower fan, electric switching valve, according to return air temperature, are controlled by fan coil controller.
The invention have the benefit that
Air-treatment unit of the present invention is provided with wind pushing temperature sensor, air-treatment unit water inlet pipe place is provided with the first calorimeter, water outlet pipe part is provided with the first electric control valve, wind pushing temperature sensor, outfan, the first calorimeter outfan, the first electric control valve input termination air processing machine group controller；The air-treatment generator set controller difference according to air-supply setting value with actual value, calculate actual demand flow, and then control the first electric control valve, the first heat tabular value is made to level off to actual demand flow, when other branch characteristic change cause the change of place bypass flow time, air-treatment generator set controller regulates the first motorized adjustment valve opening, makes actual flow always stable at requirements, it is achieved pressure-independent distribution according to need.
It is provided with differential pressure pickup between water knockout drum of the present invention and water collector, differential pressure pickup outfan adapter net balance vari-able flow control device, pipe network balance vari-able flow control device is connected with air-treatment generator set controller communication, the converter of pipe network balance vari-able flow control device output termination air-conditioner water system water pump.Pipe network balance vari-able flow control device gathers each branch road motorized adjustment valve opening automatically, when all electric control valves are in relatively low aperture (such as lower than 70%), illustrate that whole system operates in relatively underload, owing to end aperture is little, resistance is big, cause that pump energy consumption is higher, now then need pressure differential resetting value between reduction point, water collector, reduce water pump frequency further；When the motorized adjustment valve opening having more than reaches excessive aperture (such as higher than 95%), need to improve point, pressure differential resetting value between water collector, water pump frequency increases, ensure that each end flow meets demand, by adjusting pressure differential resetting value, making end electric control valve be in more rational aperture, system is run more rationally and energy-conservation, thus further increasing the usefulness of system.
Fan coil branch road it is provided with between water knockout drum of the present invention and water collector, the outfall sewer of fan coil branch road is provided with the second electric control valve, the water inlet manifold of fan coil branch road is provided with the second calorimeter, the second calorimeter outfan, the second electric control valve input adapter net balance vari-able flow control device；Fan coil is provided with the second return air temperature sensor, and water outlet pipe part is provided with electric switching valve, the second return air temperature sensor outfan, electric switching valve input connect fan coil controller；Fan coil controller balances vari-able flow control device communication with pipe network and is connected.Electric switching valve number that pipe network balance vari-able flow control device is opened according to fan coil branch road and corresponding fan coil, calculate this branch road actual demand flow, control the aperture of this branch road the second electric control valve, the actual flow that the second calorimeter reads is made to tend to requirements, when system pressure generation disturbance causes place bypass flow change, regulate this branch road the second motorized adjustment valve opening, make actual flow always stable at requirements, it is achieved pressure-independent distribution according to need.
Air-treatment generator set controller outfan of the present invention connects the converter of air-treatment unit blower fan, and air-treatment generator set controller according to return air temperature, can regulate the frequency of air-treatment unit blower fan, it is achieved the effective control under heating condition, air-treatment unit run.Fan coil controller outfan is given a dinner for a visitor from afar the third gear speed regulator of coiler blower fan, and fan coil controller according to return air temperature, can regulate fan coil fan speed, it is achieved the effective control under heating condition, fan coil run.
Accompanying drawing explanation
Fig. 1 is control principle drawing of the present invention；
Fig. 2 is the control principle drawing of air-treatment unit part of the present invention；
Fig. 3 is the control principle drawing of fan coil part of the present invention.
Detailed description of the invention
As shown in Figure 1, the air-treatment unit branch road of multiple parallel connection it is provided with between water knockout drum and water collector, each air-treatment unit branch road has an air-treatment unit AHU, in the present embodiment, system end adopts air-treatment unit AHU and fan coil FCU and by pattern, the fan coil FCU composition fan coil branch road of multiple parallel connections.As in figure 2 it is shown, air-treatment unit AHU sets the first return air temperature sensor T, wind pushing temperature sensor T3.As shown in Figure 1 and Figure 2, air-treatment unit AHU water inlet pipe place is provided with the first calorimeter R, water outlet pipe part is provided with the first electric control valve 1, first return air temperature sensor T, the outfan of wind pushing temperature sensor T3, calorimeter R outfan, the first electric control valve 1 input termination air processing machine group controller (AHU controller), air-treatment generator set controller (AHU controller) output termination air processing machine group blower fan 4 converter.
As shown in Figure 1, fan coil branch road water inlet manifold is provided with the second calorimeter R2, fan coil branch road outfall sewer is provided with the second electric control valve 6, as shown in Fig. 3, Fig. 1, fan coil FCU is provided with the second return air temperature sensor T2, water outlet pipe part is provided with electric switching valve 2, and the second return air temperature sensor T2 outfan, electric switching valve 2 input connect fan coil controller (FCU controller), and fan coil controller (FCU controller) outfan is given a dinner for a visitor from afar the third gear speed regulator of coiler blower fan 5.
As shown in Figure 1, pipeline between water knockout drum and water collector is provided with differential pressure pickup △ P, differential pressure pickup △ P outfan adapter net balance vari-able flow control device, pipe network balance vari-able flow control device is connected with air-treatment generator set controller (AHU controller), fan coil controller (FCU controller) communication, the converter of pipe network balance vari-able flow control device output termination air-conditioner water system water pump 3, the second calorimeter R2 outfan, the second electric control valve 6 input adapter net balance vari-able flow control device.
Air-treatment unit controls:
Under the control of air-treatment generator set controller (AHU controller), carry out the VFC to air-treatment unit blower fan 4 according to the change of return air temperature, regulate the aperture of the first electric control valve 1 according to the change of wind pushing temperature.For cooling condition, when return air temperature is lower than setting value, reduce the operating frequency of air-treatment unit blower fan 4, when return air temperature is higher than setting value, increases the operating frequency of air-treatment unit blower fan 4, make return air temperature maintain in set point.When wind pushing temperature is lower than setting value, reduce the aperture of the first electric control valve 1, when wind pushing temperature is higher than setting value, increase the aperture of the first electric control valve 1, it is ensured that wind pushing temperature maintains in the scope of setting；For heating condition, when return air temperature is higher than setting value, reduce the operating frequency of air-treatment unit blower fan 4, when return air temperature is lower than setting value, increase the operating frequency of air-treatment unit blower fan 4, return air temperature is made to maintain in set point, when wind pushing temperature is higher than setting value, reduce the first electric control valve 1 aperture, when wind pushing temperature is lower than setting value, increase by the first electric control valve 1 aperture, it is ensured that wind pushing temperature maintains in the scope of setting.
When regulating the wind pushing temperature that the first electric control valve 1 controls air-treatment unit, should in conjunction with the first calorimeter R reading, difference according to wind pushing temperature setting value Yu actual value, air-treatment generator set controller air processing machine group controller (AHU controller) calculates air-treatment unit actual demand flow, regulate the aperture of the first electric control valve 1, the first calorimeter R actual flow read is made to tend to requirements, when other pepeline characteristics change cause the change of place bypass flow time, first electric control valve 1 aperture is adjusted, make actual flow always stable at requirements, realize pressure-independent distribution according to need.
Fan coil controls:
Under fan coil controller (FCU controller) controls, for cooling condition, when return air temperature is lower than setting value, preferential reduction blower fan 5 gear, finally turn off electric switching valve 2；When return air temperature is higher than setting value, preferential unlatching electric switching valve 2, then improves the operational taps of blower fan 5 step by step；For heating condition, when return air temperature is higher than setting value, preferential reduction blower fan 5 gear, finally turn off electric switching valve 2；When return air temperature is higher than setting value, preferential unlatching electric switching valve 2, then improves the operational taps of blower fan 5 step by step.
Electric switching valve number that pipe network balance vari-able flow control device is opened according to fan coil branch road and corresponding fan coil, calculate this branch road actual demand flow, control the aperture of this branch road the second electric control valve 6, the second calorimeter R2 actual flow read is made to tend to requirements, when system pressure generation disturbance causes place bypass flow change, regulate this branch road the second electric control valve 6 aperture, make actual flow always stable at requirements, it is achieved pressure-independent distribution according to need.
Air conditioning system water pump variable pressure difference variable frequency adjustment:
Pipe network balance vari-able flow control device gathers each branch road electric control valve (the first motorized adjustment valve opening on air-treatment unit branch road, the second electric control valve on fan coil branch road) aperture automatically, when all electric control valves are in relatively low aperture (such as lower than 70%), illustrate that whole system operates in relatively underload, owing to end aperture is little, resistance is big, cause that pump energy consumption is higher, now then need pressure differential resetting value between reduction point, water collector, reduce water pump frequency further；When the motorized adjustment valve opening having more than reaches excessive aperture (such as higher than 95%), need to improve point, pressure differential resetting value between water collector, water pump frequency increase, it is ensured that each end flow meets demand.By adjusting pressure differential resetting value so that end electric control valve 6 is in rational aperture, system is run more rationally and energy-conservation.
Claims (9)
1. air-conditioner water system pipe network equilibrium assignmen and a flow-changing control method, is provided with the air-treatment unit branch road of multiple parallel connection between water knockout drum and water collector, it is characterised in that:
Each air-treatment unit branch road has an air-treatment unit, air-treatment unit is provided with wind pushing temperature sensor, air-treatment unit water inlet pipe place is provided with the first calorimeter, water outlet pipe part is provided with the first electric control valve, the outfan of wind pushing temperature sensor, the first calorimeter outfan, the first electric control valve input termination air processing machine group controller；
The change according to air-treatment unit wind pushing temperature of the air-treatment generator set controller, and in conjunction with the reading of the first calorimeter, regulate the aperture of the first electric control valve.
2. air-conditioner water system pipe network equilibrium assignmen according to claim 1 and flow-changing control method, it is characterized in that: between water knockout drum and water collector, be provided with fan coil branch road, described fan coil props up the fan coil routeing multiple parallel connections and constitutes, the outfall sewer of fan coil branch road is provided with the second electric control valve, the water inlet manifold of fan coil branch road is provided with the second calorimeter, the second calorimeter outfan, the second electric control valve input adapter net balance vari-able flow control device；Fan coil water outlet pipe part is provided with electric switching valve, and the input of electric switching valve connects fan coil controller；Fan coil controller balances vari-able flow control device communication with pipe network and is connected.
3. air-conditioner water system pipe network equilibrium assignmen according to claim 2 and flow-changing control method, it is characterized in that: electric switching valve number that pipe network balance vari-able flow control device is opened according to fan coil branch road and corresponding fan coil, calculate this branch road actual demand flow, control the aperture of this branch road the second electric control valve so that the actual flow that the second calorimeter reads tends to requirements.
4. air-conditioner water system pipe network equilibrium assignmen according to claim 3 and flow-changing control method, it is characterized in that: the pipeline between water knockout drum and water collector is provided with differential pressure pickup, differential pressure pickup outfan adapter net balance vari-able flow control device, pipe network balance vari-able flow control device is connected with air-treatment generator set controller communication, the converter of pipe network balance vari-able flow control device output termination air-conditioner water system water pump.
5. air-conditioner water system pipe network equilibrium assignmen according to claim 4 and flow-changing control method, it is characterized in that: air-conditioner water system water pump, according to the first motorized adjustment valve opening on air-treatment unit branch road, the second motorized adjustment valve opening on fan coil branch road, is controlled by pipe network balance vari-able flow control device.
6. air-conditioner water system pipe network equilibrium assignmen according to claim 5 and flow-changing control method, it is characterized in that: in air-treatment unit branch road, air-treatment unit is provided with the first return air temperature sensor, the output termination air processing machine group controller of the first return air temperature sensor, air-treatment generator set controller outfan connects the converter of air-treatment unit blower fan.
7. air-conditioner water system pipe network equilibrium assignmen according to claim 6 and flow-changing control method, it is characterised in that: air-treatment unit blower fan is carried out VFC according to the change of air-treatment unit return air temperature by air-treatment generator set controller.
8. air-conditioner water system pipe network equilibrium assignmen according to claim 7 and flow-changing control method, it is characterised in that: in fan coil branch road, fan coil is provided with the second return air temperature sensor, and the second return air temperature sensor outfan connects fan coil controller；Fan coil controller outfan is given a dinner for a visitor from afar the third gear speed regulator of coiler blower fan.
9. air-conditioner water system pipe network equilibrium assignmen according to claim 8 and flow-changing control method, it is characterised in that: fan coil blower fan, electric switching valve, according to return air temperature, are controlled by fan coil controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610117139.3A CN105737284A (en) | 2016-03-02 | 2016-03-02 | Pipe network balance distribution and variable flow control method of air conditioner water system |
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| CN201610117139.3A CN105737284A (en) | 2016-03-02 | 2016-03-02 | Pipe network balance distribution and variable flow control method of air conditioner water system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106369784A (en) * | 2016-10-19 | 2017-02-01 | 中铁第四勘察设计院集团有限公司 | Integrated air conditioning terminal device and control method thereof |
| CN108151235A (en) * | 2018-02-10 | 2018-06-12 | 河北工业大学 | A kind of energy-saving air conditioning system of the adaptive separated regions control of large public building |
| CN108917126A (en) * | 2017-03-29 | 2018-11-30 | 动态技术有限公司 | Air-conditioning system and air conditioning control method |
| CN111594903A (en) * | 2020-05-28 | 2020-08-28 | 南京百源通能源技术有限公司 | Hydraulic balance control system and hydraulic balance control method |
| CN112254237A (en) * | 2020-09-21 | 2021-01-22 | 无锡混沌能源技术有限公司 | Air conditioner circulating water system pressure difference control system |
| CN112665129A (en) * | 2020-12-17 | 2021-04-16 | 珠海格力电器股份有限公司 | Air conditioning unit control method and device and air conditioning unit |
| CN112902292A (en) * | 2021-01-26 | 2021-06-04 | 宁波方太厨具有限公司 | Automatic hydraulic balance adjusting method, device, system, equipment and medium for heating system |
| CN113776143A (en) * | 2021-09-17 | 2021-12-10 | 江苏图创建筑工程有限公司 | Energy-saving pipeline combined structure and method for reducing fluid resistance of efficient cold and heat supply system |
| CN114076261A (en) * | 2020-08-17 | 2022-02-22 | 安瑞科(廊坊)能源装备集成有限公司 | Natural gas filling system and filling method |
| CN114484948A (en) * | 2021-12-23 | 2022-05-13 | 广东省建筑设计研究院有限公司 | Energy-saving variable-frequency linkage system of multi-stage pump |
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| CN112254237A (en) * | 2020-09-21 | 2021-01-22 | 无锡混沌能源技术有限公司 | Air conditioner circulating water system pressure difference control system |
| CN112665129A (en) * | 2020-12-17 | 2021-04-16 | 珠海格力电器股份有限公司 | Air conditioning unit control method and device and air conditioning unit |
| CN112902292A (en) * | 2021-01-26 | 2021-06-04 | 宁波方太厨具有限公司 | Automatic hydraulic balance adjusting method, device, system, equipment and medium for heating system |
| CN112902292B (en) * | 2021-01-26 | 2022-03-08 | 宁波方太厨具有限公司 | Automatic hydraulic balance adjusting method, device, equipment and medium for heating system |
| CN113776143A (en) * | 2021-09-17 | 2021-12-10 | 江苏图创建筑工程有限公司 | Energy-saving pipeline combined structure and method for reducing fluid resistance of efficient cold and heat supply system |
| CN114484948A (en) * | 2021-12-23 | 2022-05-13 | 广东省建筑设计研究院有限公司 | Energy-saving variable-frequency linkage system of multi-stage pump |
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Application publication date: 20160706 |