CN203771629U - Differential dynamic balance energy-saving control device for closed circulating water system of central air-conditioning machine room - Google Patents
Differential dynamic balance energy-saving control device for closed circulating water system of central air-conditioning machine room Download PDFInfo
- Publication number
- CN203771629U CN203771629U CN201420022676.6U CN201420022676U CN203771629U CN 203771629 U CN203771629 U CN 203771629U CN 201420022676 U CN201420022676 U CN 201420022676U CN 203771629 U CN203771629 U CN 203771629U
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- Prior art keywords
- pressure
- water
- pressure sensor
- central air
- water system
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Abstract
The utility model discloses a differential dynamic balance energy-saving control device for a closed circulating water system of a central air-conditioning machine room, and relates to the technical field of energy-saving control of the closed circulating water system of the central air-conditioning machine room. A supply water pressure sensor for collecting pressure of supply water is mounted on a water separator of the closed circulating water system of the central air-conditioning machine room, a return water pressure sensor for collecting pressure of return water is mounted on a water collector, the supply water pressure sensor and the return water pressure sensor are used for inputting respectively collected pressure signals to a data acquisition unit, the data acquisition unit is used for converting analog signals collected by the supply water pressure sensor and the return water pressure sensor into digital signals and transmitting the digital signals to a central processor, the central processor is connected with a display operation screen for displaying and setting control target pressure difference and an output control unit for converting the digital signals into analog signals, and the output control unit is connected to a frequency conversion circulating pump and a bypass valve in the system. The differential dynamic balance energy-saving control device has the advantage that needed electric energy consumption is reduced by 30-40%.
Description
Technical field
The utility model relates to central air conditioner room closed circle water system energy-conserving control technology field, a central air conditioner room closed circle water system pressure reduction dynamic equilibrium energy-saving control device specifically, be applicable to central air conditioner room closed circle water system for backwater pressure reduction dynamic equilibrium Energy Saving Control.
Background technology
The motor-driven valve on each end branch water pipe be closed or be opened to central air conditioner end equipment can because of the variation of cooling and heating load, thereby cause Air Conditioning Facilities always to supply the pressure differential disequilibrium between water return pipeline, for making air-conditioning system stable operation, must control it.Central air conditioner room closed circle water system is, between water return pipeline, by-passing valve is being installed for the dynamic equilibrium control of backwater pressure reduction at present, by regulating the aperture of by-passing valve to realize.Although this regulative mode has guaranteed that closed circle water system is for the dynamic equilibrium of pressure reduction between backwater, water route bypass is the waste of an energy, and by-passing valve aperture is larger, wastes greatlyr, and this is a kind of control mode that is not suitable for the energy-conservation requirement of current social.
Summary of the invention
In order to solve current water route bypass, cause the energy waste problem on closed circle water system, the invention provides a kind of energy-saving control device, can guarantee that central air conditioner room closed circle water system supplies the pressure reduction dynamic equilibrium between water return pipeline, can avoid again causing waste because of the improper aperture of water route by-passing valve.
The utility model is realized with following technical scheme: a kind of central air conditioner room closed circle water system pressure reduction dynamic equilibrium energy-saving control device, on the water knockout drum of Air Conditioning Facilities closed circle water system, install for gathering the pressure of supply water sensor of pressure of supply water, on water collector, install for gathering the pressure of return water sensor of pressure of return water, the pressure signal that pressure of supply water sensor and pressure of return water sensor collect it separately inputs to data acquisition unit, data acquisition unit converts the analog signal of pressure of supply water sensor and the collection of pressure of return water sensor data signal to and is sent to central processing unit, central processing unit is connected with the output control unit that shields and data signal is converted to analog signal with setup control target pressure difference display operation for showing, frequency variable circulating pump and by-passing valve in output control unit connected system.
The beneficial effects of the utility model are: compare with the pressure reduction control device that single by-passing valve regulates, the utility model can reduce 30～40% of the needed electric energy consumption of central air-conditioning closed circle water system Pipeline transport.
Accompanying drawing explanation
Fig. 1 is centre Air Conditioning Facilities closed circle water system principle schematic;
Fig. 2 is the utility model theory diagram.
The specific embodiment
As shown in Figure 1, in the Air Conditioning Facilities closed circle water system of centre, water knockout drum is connected with water main, and water collector is connected with return main, and water knockout drum is connected with water collector by by-passing valve, and water collector connects refrigeration unit by frequency variable circulating pump.Pressure of supply water sensor is installed on water knockout drum, on water collector, is installed back water pressure sensor.
As shown in Figure 2, the pressure of supply water sensor signal of Air Conditioning Facilities closed circle water system and pressure of return water sensor (4～20mA) access data collecting unit carry out analog-to-digital conversion; Display operation screen is for showing and setup control target pressure difference (Δ P
set), central processing unit calculates for backwater pressure difference (Δ P
feedback), by Δ P
instead feedbackwith Δ P
setrelatively, through PID computing, central processing unit provides control signal to output control unit, and output control unit output 0～10VDC control signal regulates respectively the running frequency (0～50HZ) of frequency variable circulating pump and the valve body aperture (0～100%) of by-passing valve; Meanwhile, the feedback signal of the actual aperture position of frequency variable circulating pump actual motion frequency and by-passing valve is access data collecting unit also, as the reference frame that regulates logic judgement in control procedure.
Pressure reduction adjustment process: the utility model is one and combines pool regulation device, can guarantee that water system, for the pressure reduction dynamic equilibrium between water return pipeline, can guarantee again the necessary discharge of refrigeration unit safe operation.Water system adopts variable volume control mode, when control device detects for poor (the Δ P of pressure of return water
feedback) central control processor is made the priority judgement in control logic while changing.As Δ P
feedback< Δ P
settime, preferentially close by-passing valve, reduce the aperture of by-passing valve, to improve pressure differential, until Δ P
feedback=Δ P
set, P when by-passing valve aperture=0%
instead feedbackstill be less than Δ P
set, then improve the running frequency of frequency variable circulating pump, to improve pressure differential, until Δ P
feedback=Δ P
set; As Δ P
feedback> Δ P
settime, preferentially reduce the running frequency of frequency variable circulating pump, to reduce pressure differential, until Δ P
feedback=Δ P
set; When frequency variable circulating pump running frequency is down to minimum setting value (frequency variable circulating pump running frequency minimum of a value be take can meet refrigeration host computer safe operation as standard) P
feedbackstill be greater than Δ P
settime, then increase the aperture of by-passing valve, to reduce pressure differential, until Δ P
feedback=Δ P
set; So the needed energy consumption of water system Pipeline transport can be dropped to minimumly, realize the Energy Saving Control object of machine room water system.
Claims (1)
1. a central air conditioner room closed circle water system pressure reduction dynamic equilibrium energy-saving control device, it is characterized in that: on the water knockout drum of Air Conditioning Facilities closed circle water system, install for gathering the pressure of supply water sensor of pressure of supply water, on water collector, install for gathering the pressure of return water sensor of pressure of return water, the pressure signal that pressure of supply water sensor and pressure of return water sensor collect it separately inputs to data acquisition unit, data acquisition unit converts the analog signal of pressure of supply water sensor and the collection of pressure of return water sensor data signal to and is sent to central processing unit, central processing unit is connected with the output control unit that shields and data signal is converted to analog signal with setup control target pressure difference display operation for showing, frequency variable circulating pump and by-passing valve in output control unit connected system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420022676.6U CN203771629U (en) | 2014-01-14 | 2014-01-14 | Differential dynamic balance energy-saving control device for closed circulating water system of central air-conditioning machine room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420022676.6U CN203771629U (en) | 2014-01-14 | 2014-01-14 | Differential dynamic balance energy-saving control device for closed circulating water system of central air-conditioning machine room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203771629U true CN203771629U (en) | 2014-08-13 |
Family
ID=51288815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420022676.6U Expired - Fee Related CN203771629U (en) | 2014-01-14 | 2014-01-14 | Differential dynamic balance energy-saving control device for closed circulating water system of central air-conditioning machine room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203771629U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909457A (en) * | 2016-06-16 | 2016-08-31 | 江苏心日源建筑节能科技股份有限公司 | Pressure difference bypass balance power generation device and central air conditioner water path system with device |
| 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 |
| CN111678249A (en) * | 2020-06-19 | 2020-09-18 | 广东美的暖通设备有限公司 | Operation control method for air conditioning equipment, air conditioning equipment and storage medium |
-
2014
- 2014-01-14 CN CN201420022676.6U patent/CN203771629U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909457A (en) * | 2016-06-16 | 2016-08-31 | 江苏心日源建筑节能科技股份有限公司 | Pressure difference bypass balance power generation device and central air conditioner water path system with device |
| 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 |
| CN111678249A (en) * | 2020-06-19 | 2020-09-18 | 广东美的暖通设备有限公司 | Operation control method for air conditioning equipment, air conditioning equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20150114 |
|
| EXPY | Termination of patent right or utility model |