CN2591827Y - Water flow turning-on &-off motion monitoring & protector - Google Patents
Water flow turning-on &-off motion monitoring & protector Download PDFInfo
- Publication number
- CN2591827Y CN2591827Y CN 02290670 CN02290670U CN2591827Y CN 2591827 Y CN2591827 Y CN 2591827Y CN 02290670 CN02290670 CN 02290670 CN 02290670 U CN02290670 U CN 02290670U CN 2591827 Y CN2591827 Y CN 2591827Y
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- CN
- China
- Prior art keywords
- circuit
- protective device
- flow switch
- water
- protecting device
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- Expired - Fee Related
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Abstract
The utility model discloses an action monitoring and protecting device for a water flow switch, which is composed of a logical judgment circuit, a drive circuit, a control output circuit, etc. A logical exclusive-OR circuit is composed of a group of auxiliary contact points of a water pump AC contactor and a group of switching contact points of a flow valve. A contact point of an output relay of the protecting device is connected with a control loop of an air conditioning unit in series, the protecting device is provided with an instant move prevention capacitor, the protecting device can be used for other water supply systems which similarly have a water pump and the AC contactor, and the water supply systems are monitored and protected by a target type flow valve. The utility model has the advantages that a protecting circuit is composed of the logical judgment circuit, the drive circuit, the control output circuit, etc. The utility model is mainly characterized in that the action monitoring and protecting device has less elements, simple structure, reliable action and rapid response.
Description
Technical field
The utility model relates in the center air-condition circle water system for the protection of lack of water, especially a kind of water flow switch action monitoring and protective device.
Background technology
The central air-conditioning unit of making carrier with hot and cold water is in operation and will closes the compressor of air-conditioning unit immediately automatically when current stops, otherwise causes unit to damage easily.And what detect the current situation is a device that is called the target-type flow switch, and this device is installed in the pipeline of air-conditioning unit.Under the normal condition, when water pump operation, current promote the target sheet, drive the closing of contact of flow switch, make control loop unobstructed, keep system's operation.If certain reason causes discharge not enough or when stopping to flow, the target sheet of flow switch can set back under the effect of spring force, the contact disconnects, and cuts off control loop, makes system out of service.Flow switch plays detection water and flows, the important function of protection air-conditioning unit safety.But in practical matter, owing to foreign material in flow switch corrosion, spring fatigue, the pipeline stop and reason such as the quality of flow switch own, make the flow switch action malfunctioning, two kinds of situations may take place in this moment: when the normal and flow switch contact of discharge taking place can not be closed the time, control loop is cut off, and unit can not move.If but unit when in when operation the current cutout taking place flow switch recover less than original position, its contact still remains closed, operation will damage unit like this.
Summary of the invention
The purpose of this utility model is to provide a kind of water flow switch action monitoring and protective device; this water flow switch action monitoring and protective device can to water pump and whether working properly flow switch is be differentiated; send correct control signal, protect unit operation safety effectively.
The technical solution of the utility model is: a kind of water flow switch action monitoring and protective device, and this water flow switch action monitoring and protective device are made up of several partial circuits such as logic determines, driving, control outputs; One group of auxiliary contact of water pump A.C. contactor and one group of switch contact of flow switch constitute the logical exclusive-OR circuit in protective device; the control loop of the contact serial connection air-conditioning unit of the output relay of protective device; protective device has anti-wink dynamic condenser device, and protective device also can be used for similarly having in water pump and A.C. contactor and other water systems with target-type flow switching device monitoring and protecting.
Advantage of the present utility model is: protective circuit is made up of several partial circuits such as logic determines, driving, control outputs.Main spy is that used element is few, simple in structure, reliable in action, response are rapid.
Description of drawings
Fig. 1 is the utility model water flow switch action monitoring and protective device structural representation.
Embodiment
A kind of water flow switch action monitoring and protective device, this water flow switch action monitoring and protective device are made up of several partial circuits such as logic determines, driving, control outputs; One group of auxiliary contact of water pump A.C. contactor and one group of switch contact of flow switch constitute the logical exclusive-OR circuit in protective device.The control loop 4 of the contact serial connection air-conditioning unit of the output relay of protective device.Protective device has anti-wink dynamic condenser device.Protective device also can be used for similarly having in water pump and A.C. contactor and other water systems with target-type flow switching device monitoring and protecting.
KM is one group of auxiliary contact of water pump A.C. contactor, and the 1-2 representative is normally closed, 1-3 represents Chang Kai; BL is one group of switch contact of flow switch, and the 1-2 representative is normally closed, 1-3 represents Chang Kai.KM links to each other with lead with BL and constitutes the logical exclusive-OR circuit.Q1 is a drive circuit, and J1 is an output relay, the control loop 4 of its contact serial connection air-conditioning unit.C1 prevents wink dynamic condenser device, and R1 is a pull down resistor.
When KM and BL are in together normally closed or are in together when often opening, the Q1 input high level, output also is high level, J1 adhesive this moment.
When KM be in normally closed, BL be in Chang Kai or KM often be in open, BL is in when normally closed, the Q1 input low level, output also is low level, this moment, J1 disconnected.
Under stopped status, KM is adhesive not, the water pump off-duty, and BL target sheet does not stress, and the flow switch contact is in initial position, and KM and BL are in together normally closed.The Q1 input high level, output also is high level, J1 adhesive this moment, control loop is unobstructed.
After the normal operation, the KM adhesive, its auxiliary contact are connected by original 1-2 and are become the 1-3 connection, and this moment, water pump brought into operation.When current promote flow switch target sheet, the contact of flow switch is connected by original 1-2 connection becoming 1-3.The Q1 input high level, output also is high level, this moment, the J1 adhesive still made control loop unobstructed.
If KM is adhesive not, flow switch recovers less than original position during the water pump off-duty, and its contact 1-3 still remains closed, and promptly KM auxiliary contact 1-2 connects, the contact 1-3 of flow switch BL connects, this moment the Q1 input low level, output also is low level, J1 disconnects, and cuts off control loop, makes system out of service.
If KM is adhesive, flow switch is failure to actuate behind the water pump operation, and its contact 1-2 still keeps normally closed, and promptly KM auxiliary contact 1-3 connects, the contact 1-2 of flow switch BL connects, this moment the Q1 input low level, output also is low level, J1 disconnects, and cuts off control loop, makes system out of service.
In the handoff procedure of the contact of above KM and BL, C1 delays time and guarantees that circuit output is stable.
Claims (1)
1, a kind of water flow switch action monitoring and protective device is characterized in that: this water flow switch action monitoring and protective device are made up of several partial circuits such as logic determines, driving, control outputs; One group of auxiliary contact of water pump A.C. contactor and one group of switch contact of flow switch constitute the logical exclusive-OR circuit in protective device; the control loop (4) of the contact serial connection air-conditioning unit of the output relay of protective device; protective device has anti-wink dynamic condenser device, and protective device also can be used for similarly having in water pump and A.C. contactor and other water systems with target-type flow switching device monitoring and protecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02290670 CN2591827Y (en) | 2002-12-25 | 2002-12-25 | Water flow turning-on &-off motion monitoring & protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02290670 CN2591827Y (en) | 2002-12-25 | 2002-12-25 | Water flow turning-on &-off motion monitoring & protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591827Y true CN2591827Y (en) | 2003-12-10 |
Family
ID=33749814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02290670 Expired - Fee Related CN2591827Y (en) | 2002-12-25 | 2002-12-25 | Water flow turning-on &-off motion monitoring & protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2591827Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092125A (en) * | 2009-12-14 | 2011-06-15 | 常振伟 | Heating and cooling control system of dynamic mold |
| CN102721155A (en) * | 2012-06-28 | 2012-10-10 | 中国扬子集团滁州扬子空调器有限公司 | Control device and control method for rapidly detecting abnormality of commercial air conditioning water system and protecting commercial air conditioning water system |
| CN102854227A (en) * | 2011-07-01 | 2013-01-02 | 珠海格力电器股份有限公司 | Detecting device and detecting method of target-type fluid |
| CN103234258A (en) * | 2013-04-27 | 2013-08-07 | 宁波沃弗圣龙环境技术有限公司 | Fault judging handling method for central air conditioner water loop system |
-
2002
- 2002-12-25 CN CN 02290670 patent/CN2591827Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092125A (en) * | 2009-12-14 | 2011-06-15 | 常振伟 | Heating and cooling control system of dynamic mold |
| CN102854227A (en) * | 2011-07-01 | 2013-01-02 | 珠海格力电器股份有限公司 | Detecting device and detecting method of target-type fluid |
| CN102854227B (en) * | 2011-07-01 | 2014-12-24 | 珠海格力电器股份有限公司 | Detecting device and detecting method of target-type fluid |
| CN102721155A (en) * | 2012-06-28 | 2012-10-10 | 中国扬子集团滁州扬子空调器有限公司 | Control device and control method for rapidly detecting abnormality of commercial air conditioning water system and protecting commercial air conditioning water system |
| CN103234258A (en) * | 2013-04-27 | 2013-08-07 | 宁波沃弗圣龙环境技术有限公司 | Fault judging handling method for central air conditioner water loop system |
| CN103234258B (en) * | 2013-04-27 | 2015-04-08 | 宁波沃弗圣龙环境技术有限公司 | Fault judging handling method for central air conditioner water loop system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031210 Termination date: 20111225 |