CN103438550B - A kind of auto-control energy-saving cooling system of central air-conditioning - Google Patents
A kind of auto-control energy-saving cooling system of central air-conditioning Download PDFInfo
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- CN103438550B CN103438550B CN201310360587.2A CN201310360587A CN103438550B CN 103438550 B CN103438550 B CN 103438550B CN 201310360587 A CN201310360587 A CN 201310360587A CN 103438550 B CN103438550 B CN 103438550B
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Abstract
The present invention relates to a kind of auto-control energy-saving cooling system of central air-conditioning, comprise pressure sensor, controller, frequency converter and coolant pump; Described pressure sensor, for gathering the real-time pressure at expulsion of Central Air-condition Refrigerator group, is converted into discharge pressure signal by pressure at expulsion; Described controller, for producing frequency control signal according to discharge pressure signal, sends to frequency converter by frequency control signal; Described frequency converter, for receive frequency control signal, according to the operating frequency of frequency control signal adjustment frequency converter, the operational factor according to the coolant pump of different Central Air-condition Refrigerator groups setting correspondence, produces cooling control signal; Described coolant pump, for the rotating speed according to cooling control signal adjustment coolant pump, thus regulates the cryogenic temperature of central air-conditioning.The present invention can realize carrying out Automated condtrol, energy-conservation to the cooling system of central air-conditioning, can strengthen the energy-saving effect of refrigeration host computer even running and cooling water pump.
Description
Technical field
The present invention relates to a kind of cooling system of central air-conditioning, particularly a kind of auto-control energy-saving cooling system of central air-conditioning.
Background technology
Design of Central Air Conditioning Systems is operating mode under extreme condition, and the actual oepration at full load time is less than 30%.Current central air conditioning cooling water system (coolant pump) cannot run according to unit actual needs, causes very large power wastage.Simultaneously due to cooling water just start (or the spring, the autumn, winter) temperature is lower in situation, easily cause refrigeration host computer pressure reduction too small, oil return is unfavorable, affects the steady safe operation of refrigeration unit.Mainly through Bonding pressure sensor, frequency converter, the control of PLC realization to cooling water pump.
Existing product generally adopts the method installing by-passing valve additional at cooling system or close cooling tower fan to control, and causes refrigeration unit pressure at expulsion unstable like this.
Wherein installing by-passing valve additional just allows cooling water directly get back to refrigeration unit without cooling tower cooling, thus ensures that refrigeration unit pressure at expulsion can not be too low.The method deficiency has 2 points: 1 cooling water flogs a dead horse and wastes energy; 2 units still can because of too low break down (area that particularly day and night temperature is large) of cooling water temperature when just starting.
The technological deficiency of closing cooling tower fan mainly contains: 1, unit still can because of too low break down (area that particularly day and night temperature is large) of cooling water temperature when just starting.2, cooling tower cooling is main relies on heat exchange and cooling water evaporation, and the atural beat that cooling water evaporation refrigerating efficiency is much higher than cooling water exchanges, close the actual operating efficiency greatly reducing cooling tower of fan, and actual energy-conservation limited (general cooling tower fan peak power 7.5KW).3, cooling tower fan electromotor frequent starting adds equipment failure rate.In addition owing to adopting cooling water temperature signal to control start and stop or switch; when condenser occur fouling, dirty stifled truly can not reflect cooling water inflow required for refrigeration unit reality; refrigeration unit refrigerating efficiency may be caused to decline, and pressure at expulsion crosses the problems such as high.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can Automated condtrol, the auto-control energy-saving cooling system of energy-conservation central air-conditioning.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of auto-control energy-saving cooling system of central air-conditioning, comprises pressure sensor, controller, frequency converter and coolant pump;
Described pressure sensor, for gathering the real-time pressure at expulsion of Central Air-condition Refrigerator group, is converted into discharge pressure signal by pressure at expulsion, and the discharge pressure signal collected is sent to controller;
Described controller, for receiving discharge pressure signal, producing frequency control signal according to discharge pressure signal, frequency control signal is sent to frequency converter;
Described frequency converter, for receive frequency control signal, according to the operating frequency of frequency control signal adjustment frequency converter, the operational factor according to the coolant pump of different Central Air-condition Refrigerator groups setting correspondence, produce cooling control signal, cooling control signal is sent to coolant pump;
Described coolant pump, for receiving cooling control signal, according to the rotating speed of cooling control signal adjustment coolant pump, thus regulates the cryogenic temperature of central air-conditioning.
The invention has the beneficial effects as follows: can realize carrying out Automated condtrol, energy-conservation to the cooling system of central air-conditioning, the energy-saving effect of refrigeration host computer even running and cooling water pump can be strengthened.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described controller is PLC.
Adopt the beneficial effect of above-mentioned further scheme to be adopt the PLC being applicable to industry control, can adapt to various severe running environment, antijamming capability is strong, and reliability is strong.
Further, the voltage range of described discharge pressure signal is 0V to 5V.
The beneficial effect of above-mentioned further scheme is adopted to be facilitate the reception of various types of controller, identification.
Further, the voltage range of described frequency control signal is 0V to 5V.
The beneficial effect of above-mentioned further scheme is adopted to be facilitate frequency converter to receive to identify.
Accompanying drawing explanation
Fig. 1 is present system structure chart.
In accompanying drawing, the list of parts representated by each label is as follows:
1, pressure sensor, 2, controller, 3, frequency converter, 4, coolant pump, 5, Central Air-condition Refrigerator group.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, be the inventive method structure chart.
Embodiment 1
An auto-control energy-saving cooling system for central air-conditioning, comprises pressure sensor 1, controller 2, frequency converter 3 and coolant pump 4;
Described pressure sensor 1, for gathering the real-time pressure at expulsion of Central Air-condition Refrigerator group 5, is converted into discharge pressure signal by pressure at expulsion, and the discharge pressure signal collected is sent to controller 2;
Described controller 2, for receiving discharge pressure signal, producing frequency control signal according to discharge pressure signal, frequency control signal being sent to frequency converter 3;
Described frequency converter 3, for receive frequency control signal, according to the operating frequency of frequency control signal adjustment frequency converter, the operational factor according to the coolant pump 4 of different Central Air-condition Refrigerator groups setting correspondence, produce cooling control signal, cooling control signal is sent to coolant pump 4;
Described coolant pump 4, for receiving cooling control signal, according to the rotating speed of cooling control signal adjustment coolant pump, thus regulates the cryogenic temperature of central air-conditioning.
Described controller 2 is PLC.The voltage range of described discharge pressure signal is 0V to 5V, and the current range of discharge pressure signal is 4mA to 20mA.The voltage range of described frequency control signal is 0V to 5V, and the current range of frequency control signal is 4mA to 20mA.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. an auto-control energy-saving cooling system for central air-conditioning, is characterized in that: comprise pressure sensor (1), controller (2), frequency converter (3) and coolant pump (4);
Described pressure sensor (1), for gathering the real-time pressure at expulsion of Central Air-condition Refrigerator group (5), is converted into discharge pressure signal by pressure at expulsion, and the discharge pressure signal collected is sent to controller (2);
Described controller (2), for receiving discharge pressure signal, producing frequency control signal according to discharge pressure signal, frequency control signal being sent to frequency converter (3);
Described frequency converter (3), for receive frequency control signal, according to the operating frequency of frequency control signal adjustment frequency converter, the operational factor according to the coolant pump (4) of different Central Air-condition Refrigerator groups setting correspondence, produce cooling control signal, cooling control signal is sent to coolant pump (4);
Described coolant pump (4), for receiving cooling control signal, according to the rotating speed of cooling control signal adjustment coolant pump, thus regulates the cryogenic temperature of central air-conditioning.
2. auto-control energy-saving cooling system according to claim 1, is characterized in that: described controller (2) is PLC.
3. auto-control energy-saving cooling system according to claim 1, is characterized in that: the voltage range of described discharge pressure signal is 0V to 5V.
4. auto-control energy-saving cooling system according to claim 1, is characterized in that: the voltage range of described frequency control signal is 0V to 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310360587.2A CN103438550B (en) | 2013-08-16 | 2013-08-16 | A kind of auto-control energy-saving cooling system of central air-conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310360587.2A CN103438550B (en) | 2013-08-16 | 2013-08-16 | A kind of auto-control energy-saving cooling system of central air-conditioning |
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| Publication Number | Publication Date |
|---|---|
| CN103438550A CN103438550A (en) | 2013-12-11 |
| CN103438550B true CN103438550B (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310360587.2A Expired - Fee Related CN103438550B (en) | 2013-08-16 | 2013-08-16 | A kind of auto-control energy-saving cooling system of central air-conditioning |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113280468A (en) * | 2021-06-15 | 2021-08-20 | 佛山市顺德区美的电子科技有限公司 | Operation control method of air conditioner, air conditioner and computer readable storage medium |
| CN113970169A (en) * | 2021-11-29 | 2022-01-25 | 中国人民解放军陆军装甲兵学院士官学校 | Electric energy-saving control method for central air conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301943A (en) * | 1999-12-27 | 2001-07-04 | 株式会社丰田自动织机制作所 | Air conditioner system |
| CN2909078Y (en) * | 2005-12-31 | 2007-06-06 | 东莞市广大制冷有限公司 | Central air conditioning system capable of regulating flow of cooling water and refrigeration water |
| CN201569109U (en) * | 2009-12-22 | 2010-09-01 | 山西省工业设备安装公司 | Frequency-conversion energy-saving control device for water circulation system of central air conditioning |
| CN201885354U (en) * | 2010-11-25 | 2011-06-29 | 河南省电力公司郑州供电公司 | Energy-saving central air-conditioning system |
| CN102425841A (en) * | 2011-12-02 | 2012-04-25 | 深圳市森控科技有限公司 | Method for controlling machine room air conditioner based on variable frequency compressor |
| CN202709388U (en) * | 2012-07-12 | 2013-01-30 | 博耳(无锡)电力成套有限公司 | Central air-conditioning energy-saving device controlled by sensor |
-
2013
- 2013-08-16 CN CN201310360587.2A patent/CN103438550B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301943A (en) * | 1999-12-27 | 2001-07-04 | 株式会社丰田自动织机制作所 | Air conditioner system |
| CN2909078Y (en) * | 2005-12-31 | 2007-06-06 | 东莞市广大制冷有限公司 | Central air conditioning system capable of regulating flow of cooling water and refrigeration water |
| CN201569109U (en) * | 2009-12-22 | 2010-09-01 | 山西省工业设备安装公司 | Frequency-conversion energy-saving control device for water circulation system of central air conditioning |
| CN201885354U (en) * | 2010-11-25 | 2011-06-29 | 河南省电力公司郑州供电公司 | Energy-saving central air-conditioning system |
| CN102425841A (en) * | 2011-12-02 | 2012-04-25 | 深圳市森控科技有限公司 | Method for controlling machine room air conditioner based on variable frequency compressor |
| CN202709388U (en) * | 2012-07-12 | 2013-01-30 | 博耳(无锡)电力成套有限公司 | Central air-conditioning energy-saving device controlled by sensor |
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| CN103438550A (en) | 2013-12-11 |
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Granted publication date: 20151223 Termination date: 20160816 |