CN201964577U - Energy-saving control system for central air conditioner - Google Patents

Energy-saving control system for central air conditioner Download PDF

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Publication number
CN201964577U
CN201964577U CN2010207002861U CN201020700286U CN201964577U CN 201964577 U CN201964577 U CN 201964577U CN 2010207002861 U CN2010207002861 U CN 2010207002861U CN 201020700286 U CN201020700286 U CN 201020700286U CN 201964577 U CN201964577 U CN 201964577U
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CN
China
Prior art keywords
water
chilled water
sensor
temperature difference
chilled
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Expired - Fee Related
Application number
CN2010207002861U
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Chinese (zh)
Inventor
刘付云
马春光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen City Yihuaxinneng Technology Development Co Ltd
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Shenzhen City Yihuaxinneng Technology Development Co Ltd
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Priority to CN2010207002861U priority Critical patent/CN201964577U/en
Application granted granted Critical
Publication of CN201964577U publication Critical patent/CN201964577U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an energy-saving control system for a central air conditioner, which comprises a chilled water supplying-returning water temperature difference sensor, a chilled water supplying-returning water pressure difference sensor, a cooling water supplying-returning water temperature difference sensor, an industrial personal computer, a programmable logic controller, a chilled water pump frequency converter and a cooling water pump frequency converter, wherein the chilled water supplying-returning water temperature difference sensor and the chilled water supplying-returning water pressure difference sensor respectively transfer temperature difference and pressure difference information of the chilled water into the programmable logic controller to be displayed on the industrial personal computer; the cooling water supplying-returning water temperature difference sensor transfers temperature difference information of the cooling water into the programmable logic controller to be displayed on the industrial personal computer; the industrial personal computer transfers an operating command to the programmable logic controller so as to control the chilled water pump frequency converter and the cooling water pump frequency converter. The energy-saving control system for the central air conditioner analyzes the temperature difference and pressure difference information of the detected chilled water and cooling water by the combination of the programmable logic controller and the industrial personal computer and then controls the water pump frequency converter so as to achieve the purposes of intelligent control, indoor temperature and humidity control, energy saving and emission reduction.

Description

The central air-conditioning energy control system
Technical field
The utility model relates to a kind of central air-conditioning energy control system, belongs to the refrigeration control system field.
Background technology
At present, the control mode of overwhelming majority central air-conditioning is on the spot or the remote control equipment start and stop, manual adjustments refrigeration host computer outlet temperature, because of central air-conditioning is to be operated under the part load condition the overwhelming majority time, this control mode can not in time be regulated the operational factor of central air conditioner system according to the actual operating position of building, cause indoor environment overheated or cold excessively easily, and cause great energy consumption waste.And the central air conditioner system that sub-fraction adopts automatic control equipment to carry out reducing energy consumption; also there is the control strategy problem; decide frequency operation, anhydrous balanced protection measure etc. such as adopting, in various degree exist local devices energy-conservation and entire system is not energy-conservation, pipeline pressure is not enough, indoor temperature is crossed problems such as height.Therefore, central air conditioner system is energy-conservation to need to consider energy-saving benefit and guarantees indoor comfort degree that we need a kind of central air-conditioning course control method for use of height intelligence.
The utility model content
The utility model provides a kind of central air-conditioning energy control system in order to overcome the deficiencies in the prior art,
The utility model can be achieved by taking following technical scheme:
A kind of central air-conditioning energy control system, comprise chilled water supply backwater temperature difference sensor, chilled water is for the backwater differential pressure pickup, cooling water supply backwater temperature difference sensor, industrial computer, programmable logic controller (PLC), chilled water pump frequency converter and cooling water pump frequency converter, described chilled water supply backwater temperature difference sensor, chilled water for the backwater differential pressure pickup respectively with the temperature difference and the differential pressure information of chilled water, cooling water supply backwater temperature difference sensor is sent to programmable logic controller (PLC) with the temperature difference information of cooling water and is presented on the industrial computer, and described industrial computer is sent to PLC controls chilled water pump frequency converter and cooling water pump converting operation with operating instruction.
On the basis of the above, chilled water supply backwater temperature difference sensor described in the utility model comprises chilled water supply water temperature sensor and chilled water return water temperature sensor, described chilled water supply water temperature sensor is arranged on the chilled water inlet place, and described chilled water return water temperature sensor is arranged on the exit of chilled water; Described chilled water comprises chilled water pressure of supply water sensor and chilled water pressure of return water sensor for the backwater differential pressure pickup, described chilled water pressure of supply water sensor is arranged on the chilled water inlet place, and described chilled water pressure of return water sensor is arranged on the exit of chilled water; Described cooling water supply backwater temperature difference sensor comprises cooling water temperature sensor and cooling water return water temperature sensor, described cooling water temperature sensor is arranged on the place, cooling water inlet, and described cooling water return water temperature sensor is arranged on the exit of cooling water.
Compared with prior art, the utlity model has following advantage: the utility model combines by industrial computer and programmable logic controller (PLC), the temperature difference and the differential pressure information of detected chilled water and cooling water are analyzed, again the pump variable frequency device is controlled, reached the purpose of Based Intelligent Control, indoor temperature and humidity control and energy-saving and emission-reduction.In addition, the utility model is simple in structure, and applicability is wide, is applicable to the central air conditioner system of office building, market, hotel, stadiums, factory etc.
Description of drawings
Fig. 1 is the system construction drawing of central air-conditioning energy control system of the present utility model;
Fig. 2 is the logic control chart of the programmable logic controller (PLC) among Fig. 1.
The specific embodiment
Have embodiment and be described in detail of the present utility model below in conjunction with accompanying drawing.
As shown in Figure 1, central air-conditioning energy control system of the present utility model, comprise that chilled water supply backwater temperature difference sensor, chilled water are for backwater differential pressure pickup, cooling water supply backwater temperature difference sensor, industrial computer, programmable logic controller (PLC), chilled water pump frequency converter and cooling water pump frequency converter, described chilled water supply backwater temperature difference sensor comprises chilled water supply water temperature sensor and chilled water return water temperature sensor, described chilled water supply water temperature sensor is arranged on the chilled water inlet place, and described chilled water return water temperature sensor is arranged on the exit of chilled water; Described chilled water comprises chilled water pressure of supply water sensor and chilled water pressure of return water sensor for the backwater differential pressure pickup, described chilled water pressure of supply water sensor is arranged on the chilled water inlet place, and described chilled water pressure of return water sensor is arranged on the exit of chilled water; Described cooling water supply backwater temperature difference sensor comprises cooling water temperature sensor and cooling water return water temperature sensor, described cooling water temperature sensor is arranged on the place, cooling water inlet, and described cooling water return water temperature sensor is arranged on the exit of cooling water; Described chilled water supply backwater temperature difference sensor, chilled water are sent to programmable logic controller (PLC) with the temperature difference of chilled water and differential pressure information, cooling water supply backwater temperature difference sensor with the temperature difference information of cooling water respectively for the backwater differential pressure pickup and are presented on the industrial computer, described industrial computer is sent to PLC controls chilled water pump frequency converter and cooling water pump converting operation with operating instruction, comprise man-machine interface in the industrial computer, can control parameter, issue control instruction and check historical data by real time execution parameter, the setting of this interface monitoring central air conditioner system.
As shown in Figure 2, the main program of programmable logic controller (PLC) of the present utility model comprises temperature difference computing module: calculate programmable logic controller (PLC) PLC collection freezing (but) water and go up the temperature difference for the return main; Pressure reduction computing module: calculate programmable logic controller (PLC) PLC collection chilled water and go up pressure reduction for the return main; Time/temperature difference control curve: store the temperature difference setting value in the time period, can change; The temperature difference/FREQUENCY CONTROL curve: the corresponding relation that stores the temperature difference and frequency; Pressure reduction/FREQUENCY CONTROL curve: the corresponding relation that stores pressure reduction and frequency.Pressure reduction/the frequency curve of this main program module possesses self-learning function, in running, monitors instant pressure difference and instant running frequency, constantly improves pressure reduction and running frequency curve; Programme-control system differential pressure security is preferential, and is by the initial pressure reduction/frequency curve of user's history run situation editor, perfect automatically in system's running.When robot control system(RCS) is carried out power-save operation in running, need to guarantee to satisfy the indoor temperature and humidity requirement by pressure reduction/frequency curve checking.
The utility model combines by industrial computer and programmable logic controller (PLC), the temperature difference and the differential pressure information of detected chilled water and cooling water are analyzed, again the pump variable frequency device is controlled, reached the purpose of Based Intelligent Control, indoor temperature and humidity control and energy-saving and emission-reduction.

Claims (4)

1. central air-conditioning energy control system, it is characterized in that comprising chilled water supply backwater temperature difference sensor, chilled water is for the backwater differential pressure pickup, cooling water supply backwater temperature difference sensor, industrial computer, programmable logic controller (PLC), chilled water pump frequency converter and cooling water pump frequency converter, described chilled water supply backwater temperature difference sensor, chilled water for the backwater differential pressure pickup respectively with the temperature difference and the differential pressure information of chilled water, cooling water supply backwater temperature difference sensor is sent to programmable logic controller (PLC) with the temperature difference information of cooling water and is presented on the industrial computer, and described industrial computer is sent to PLC controls chilled water pump frequency converter and cooling water pump converting operation with operating instruction.
2. central air-conditioning energy control system according to claim 1, it is characterized in that described chilled water supply backwater temperature difference sensor comprises chilled water supply water temperature sensor and chilled water return water temperature sensor, described chilled water supply water temperature sensor is arranged on the chilled water inlet place, and described chilled water return water temperature sensor is arranged on the exit of chilled water.
3. central air-conditioning energy control system according to claim 2, it is characterized in that described chilled water comprises chilled water pressure of supply water sensor and chilled water pressure of return water sensor for the backwater differential pressure pickup, described chilled water pressure of supply water sensor is arranged on the chilled water inlet place, and described chilled water pressure of return water sensor is arranged on the exit of chilled water.
4. according to each described central air-conditioning energy control system in the claim 1 to 3, it is characterized in that described cooling water supply backwater temperature difference sensor comprises cooling water temperature sensor and cooling water return water temperature sensor, described cooling water temperature sensor is arranged on the place, cooling water inlet, and described cooling water return water temperature sensor is arranged on the exit of cooling water.
CN2010207002861U 2010-12-31 2010-12-31 Energy-saving control system for central air conditioner Expired - Fee Related CN201964577U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010207002861U CN201964577U (en) 2010-12-31 2010-12-31 Energy-saving control system for central air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010207002861U CN201964577U (en) 2010-12-31 2010-12-31 Energy-saving control system for central air conditioner

Publications (1)

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CN201964577U true CN201964577U (en) 2011-09-07

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102418965A (en) * 2011-09-16 2012-04-18 浙江大学 Multifunctional frequency conversion central air-conditioning experimental platform
CN103292391A (en) * 2013-06-07 2013-09-11 昆山市远视商用空调工程有限公司 Air-conditioner energy storage device
CN105652773A (en) * 2016-03-22 2016-06-08 广西华锐钢铁工程设计咨询有限责任公司 Cooling system temperature and pressure difference detecting and monitoring system
CN104359195B (en) * 2014-12-31 2017-03-08 江苏联宏自动化系统工程有限公司 Based on the central air-conditioning freezing water controling method that dynamic response end total load changes
CN109668272A (en) * 2018-12-11 2019-04-23 上海慧鎏科技有限公司 Central air conditioner system refrigerating water pump progress control method and freezing pump controller
CN109990443A (en) * 2019-04-11 2019-07-09 舒心(南京)环保能源科技有限公司 A kind of intelligent power saving automatic control frequency converter control system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102418965A (en) * 2011-09-16 2012-04-18 浙江大学 Multifunctional frequency conversion central air-conditioning experimental platform
CN103292391A (en) * 2013-06-07 2013-09-11 昆山市远视商用空调工程有限公司 Air-conditioner energy storage device
CN104359195B (en) * 2014-12-31 2017-03-08 江苏联宏自动化系统工程有限公司 Based on the central air-conditioning freezing water controling method that dynamic response end total load changes
CN105652773A (en) * 2016-03-22 2016-06-08 广西华锐钢铁工程设计咨询有限责任公司 Cooling system temperature and pressure difference detecting and monitoring system
CN109668272A (en) * 2018-12-11 2019-04-23 上海慧鎏科技有限公司 Central air conditioner system refrigerating water pump progress control method and freezing pump controller
CN109990443A (en) * 2019-04-11 2019-07-09 舒心(南京)环保能源科技有限公司 A kind of intelligent power saving automatic control frequency converter control system

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C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110907

Termination date: 20131231