CN102721155A - Control device and control method for rapidly detecting abnormality of commercial air conditioning water system and protecting commercial air conditioning water system - Google Patents
Control device and control method for rapidly detecting abnormality of commercial air conditioning water system and protecting commercial air conditioning water system Download PDFInfo
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- CN102721155A CN102721155A CN2012102187418A CN201210218741A CN102721155A CN 102721155 A CN102721155 A CN 102721155A CN 2012102187418 A CN2012102187418 A CN 2012102187418A CN 201210218741 A CN201210218741 A CN 201210218741A CN 102721155 A CN102721155 A CN 102721155A
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Abstract
The invention discloses a control device and a control method for rapidly detecting abnormality of a commercial air conditioning water system and protecting the commercial air conditioning water system. The control device comprises an air conditioning unit control device and a water flow detecting device; the air conditioning unit control device comprises a control panel and a controller, wherein the control panel is provided with a singlechip and an intermediate relay; the water flow detecting device is used for detecting the running state signals of air conditioning water circulation water pump, is connected with the singlechip and transfers the running state signals of the water pump to the singlechip; and the singlechip receives the running state signals of the circulation water pump transferred by the water flow detecting device, and generates control signals according to the instructions of the controller and the running state signals of the water pump so as to control the running of each compressor and the water flow detecting device of an air conditioner. According to the control method, the key control of water flow state detection and judgment in the standby state before the unit is started is added, so that the damage caused by freezing and the scrap of an air conditioning unit caused by nonstandard engineering installation can be avoided.
Description
Technical field
The present invention relates to the business air conditioner field, specifically a kind of fast detecting business air conditioner water system unusual and control device and the control method thereof protected.
Background technology
The use side of cold (heat) water unit of using in the business air conditioner field and the heat source side of water-cooled unit all need the supporting pipeline engineering water system that is equipped with; All need use simultaneously recirculated water and carry out the transmission of cold (heat) amount, accomplish the basic function of use of air-conditioning unit as medium.Use recirculated water that water circulating pump must be installed, the control signal whether water circulating pump works derives from the air conditioner group controller; Simultaneously, in the engineering water system, need install a current checkout gear on request additional, detected streamflow regime (switching value, closed or disconnection) signal is linked in the control system of air-conditioning unit.
As shown in Figure 3, after operation that the air-conditioning unit is started shooting, air-conditioner control system can send a water circulating pump control of turning signal, and just we water pump and the air-conditioner host often said link for these.Open operation when water pump, after the discharge in the waterpipe satisfied requirement of system design, the current checkout gear that is installed in the water system just can move, and this actuating signal is passed to the control system of air-conditioning unit.When air-conditioner control system detects circulating water flow just often, just allow the normal compressor and starting of air-conditioning unit system to move.When the discharge in the water system do not reach that design discharge requires or pipeline in have a large amount of air when not draining fully; The current checkout gear just can not move; The control system of main frame just detects less than the normal signal of discharge, and after a period of time, the control system just can stop the operation of water pump; And give water flow not enough alarm signal, engineering maintenance is carried out in prompting.
But when the on-the-spot installation of air-conditioning unit, the construction party that has with water pump and air-conditioner host interlock, but carries out independent start-stop control with water pump for easy construction.Simultaneously,, the current checkout gear is not installed, is handled, and then avoided the normal detection arbitration functions of air-conditioner control system, force to make the air-conditioning unit to open operation and the discharge detection signal in the air-conditioner control system is carried out artificial short circuit in order to reduce engineering cost.
This nonstandard operation behavior can often take place in the Air-conditioning Engineering construction to some extent.After taking this measure; In case do not have the recirculated water that flows in the water system, following two kinds of phenomenons just can occur: 1, when cold (heat) water unit carries out heating operation, and the water-cooled unit is when carrying out refrigerating operaton; It is too high that water-side heat inside all can Yin Wendu, and overload appears in the air-conditioning unit.2, when cold (heat) water unit carries out refrigerating operaton, and the water-cooled unit is when carrying out heating operation, water-side heat inside all can occur the part in addition all Yin Wendu finally cause the compressor assembly water inlet to below freezing and freezed, the air-conditioning unit is scrapped.
Summary of the invention:
Weak point for fear of the prior art existence; The invention provides a kind of fast detecting business air conditioner water system is unusual and protect control device and control method thereof; After giving the power supply of air-conditioning unit, the control system of air-conditioning detects the state of the discharge checkout gear in the engineering immediately; When detecting water-flow signal and be off-state, the expression engineering is normal with the discharge checkout gear, otherwise unusually.
Technical solution problem of the present invention adopts following technical scheme:
Unusual and the control device protected of a kind of fast detecting business air conditioner water system, its design feature is: comprise air-conditioning unit control device and current checkout gear,
Said air-conditioning unit control device comprises control panel and controller, and said control panel is provided with single-chip microcomputer and is used to control the auxiliary reclay that the air conditioner water water circulating pump is opened and stopped; Said auxiliary reclay links to each other with single-chip microcomputer; Said controller is connected with single-chip microcomputer and the external control instruction is passed to single-chip microcomputer;
Said current checkout gear is used for detecting in real time the operating state signal of air conditioner water water circulating pump; Said operating state signal comprises the discharge of water circulating pump and the closure and the off-state of water circulating pump, and said current checkout gear links to each other with single-chip microcomputer and detected water pump operation status signal is passed to single-chip microcomputer;
Said single-chip microcomputer receives the water circulating pump operating state signal that the current checkout gear transmits, and produces control signal according to controller instruction and water pump operation status signal, the operation of each compressor of control air-conditioning unit and the operation of current checkout gear.
The control method of the unusual and control device protected of a kind of business air conditioner of fast detecting as stated water system; As follows: when the air-conditioning unit need move when operation of starting shooting; Air-conditioning unit control device feedwater flow checkout gear sends opens and detects instruction, if the current checkout gear detects water-flow signal when being off-state, expression current checkout gear is installed normal; Otherwise, then need check the installation of current checkout gear; Install just often when the current checkout gear, the current checkout gear is temporarily out of service; The control device of air-conditioning unit sends an instruction of opening the operation of air conditioner water water circulating pump then; Be preset with scheduled time △ T in the single-chip microcomputer; After the time that instruction is sent surpasses △ T; Single-chip microcomputer feedwater flow checkout gear sends detection signal, and the current checkout gear begins the water circulating pump running status is detected once more; When single-chip microcomputer receive water circulating pump operating state signal that the current checkout gear transmits normal after, promptly in each pipeline of air-conditioner water system discharge normal after, single-chip microcomputer produces control signal, each compressor assembly of air-conditioning unit is opened operation successively; Otherwise, stoppage protection air-conditioning unit and overhaul air-conditioner water system then; In the process that each compressor assembly is opened successively and after all opening, will continue the state of discharge is detected,, hard stop protected the air-conditioning unit in case it is unusual current to occur.
Compared with present technology, beneficial effect of the present invention is embodied in:
Fast detecting control method of the present invention is compared with water-flow control method in the past; Holding state streamflow regime down detects and the pass key control of judging before having increased the unit start, avoid because of do not install in the work progress current checkout gear or artificially short circuit current detection signals cause damage to the air-conditioning unit.
Whether the control that whether links of the start-stop control that apparatus of the present invention and control method thereof can effectively be judged water pump and air-conditioner control system is controlled the discharge detecting position of system and is handled by short circuit.Can monitor Air-conditioning Engineering when construction standard construction whether on request.
Description of drawings
Fig. 1 is apparatus of the present invention control principle figure.
Fig. 2 is the control sequential sketch map of control method of the present invention.
Fig. 3 is the control sequential that traditional control method uses.
Among the figure: t1 is that the unit power supply moment, t2 are that the unit start moment, t3 are that the unit water pump is opened constantly, t4 is the lasting moment, the △ T=t4-t3 of detecting of current.
Technical scheme of the present invention is further specified through the specific embodiment below in conjunction with accompanying drawing.
The specific embodiment
As shown in Figure 1; Unusual and the control device protected of fast detecting business air conditioner water system; Comprise air-conditioning unit control device and current checkout gear; Air-conditioning unit control device comprises control panel and controller, and control panel is provided with single-chip microcomputer and is used to control the auxiliary reclay that the air conditioner water water circulating pump is opened and stopped; Auxiliary reclay links to each other with single-chip microcomputer; Controller is connected with single-chip microcomputer and the external control instruction is passed to single-chip microcomputer;
The current checkout gear is used for detecting in real time the operating state signal of air conditioner water water circulating pump; Operating state signal comprises the discharge of water circulating pump and the closure and the off-state of water circulating pump, and the current checkout gear links to each other with single-chip microcomputer and detected water pump operation status signal is passed to single-chip microcomputer;
Single-chip microcomputer receives the water circulating pump operating state signal that the current checkout gear transmits; And produce control signal according to controller instruction and water pump operation status signal, the opening and stop of the operation of each compressor of control air-conditioning unit, the operation of current checkout gear and water circulating pump.
As shown in Figure 1; Through operation to controller; Realize the control of control panel to the air-conditioning unit, the single-chip microcomputer on the control panel is controlled opening of water circulating pump through the auxiliary reclay on the control panel and is stopped simultaneously, and auxiliary reclay connects A.C. contactor; Contactor through A.C. contactor control water circulating pump is provided with thermal overload relay simultaneously in the water circulating pump circuit.
The control method of the unusual and control device protected of a kind of business air conditioner of fast detecting as stated water system; As follows: when the air-conditioning unit need move when operation of starting shooting; Air-conditioning unit control device feedwater flow checkout gear sends opens and detects instruction, if the current checkout gear detects water-flow signal when being off-state, expression current checkout gear is installed normal; Otherwise, then need check the installation of current checkout gear; Install just often when the current checkout gear, the current checkout gear is temporarily out of service; The control device of air-conditioning unit sends an instruction of opening the operation of air conditioner water water circulating pump then; Be preset with scheduled time △ T (△ T is that discharge reaches the needed time of normal value to water pump in each pipeline of water circulation system from being opened to) in the single-chip microcomputer; After the time that instruction is sent surpasses △ T; Single-chip microcomputer feedwater flow checkout gear sends detection signal, and the current checkout gear begins the water circulating pump running status is detected once more; When single-chip microcomputer receive water circulating pump operating state signal that the current checkout gear transmits normal after, promptly in each pipeline of air-conditioner water system discharge normal after, single-chip microcomputer produces control signal, each compressor assembly of air-conditioning unit is opened operation successively; Otherwise, stoppage protection air-conditioning unit and overhaul air-conditioner water system then; In the process that each compressor assembly is opened successively and after all opening, will continue the state of discharge is detected, and in case it is unusual current to occur, hard stop protected the air-conditioning unit, the control sequential is as shown in Figure 2.
Claims (2)
1. the unusual and control device protected of a fast detecting business air conditioner water system is characterized in that, comprises air-conditioning unit control device and current checkout gear,
Said air-conditioning unit control device comprises control panel and controller, and said control panel is provided with single-chip microcomputer and is used to control the auxiliary reclay that the air conditioner water water circulating pump is opened and stopped; Said auxiliary reclay links to each other with single-chip microcomputer; Said controller is connected with single-chip microcomputer and the external control instruction is passed to single-chip microcomputer;
Said current checkout gear is used for detecting in real time the operating state signal of air conditioner water water circulating pump; Said operating state signal comprises the discharge of water circulating pump and the closure and the off-state of water circulating pump, and said current checkout gear links to each other with single-chip microcomputer and detected water pump operation status signal is passed to single-chip microcomputer;
Said single-chip microcomputer receives the water circulating pump operating state signal that the current checkout gear transmits, and produces control signal according to controller instruction and water pump operation status signal, the operation of each compressor of control air-conditioning unit and the operation of current checkout gear.
2. the control method of the unusual and control device protected of the said fast detecting business air conditioner of claim 1 water system; It is characterized in that: when the air-conditioning unit need move when operation of starting shooting; Air-conditioning unit control device feedwater flow checkout gear sends opens and detects instruction, if the current checkout gear detects water-flow signal when being off-state, expression current checkout gear is installed normal; Otherwise, then need check the installation of current checkout gear; Install just often when the current checkout gear, the current checkout gear is temporarily out of service; The control device of air-conditioning unit sends an instruction of opening the operation of air conditioner water water circulating pump then; Be preset with scheduled time △ T in the single-chip microcomputer; After the time that instruction is sent surpasses △ T; Single-chip microcomputer feedwater flow checkout gear sends detection signal, and said current checkout gear begins the water circulating pump running status is detected once more; When single-chip microcomputer receive water circulating pump operating state signal that the current checkout gear transmits normal after, promptly in each pipeline of air-conditioner water system discharge normal after, single-chip microcomputer produces control signal, each compressor assembly of air-conditioning unit is opened operation successively; Otherwise, stoppage protection air-conditioning unit and overhaul air-conditioner water system then; In the process that each compressor assembly is opened successively and after all opening, will continue the state of discharge is detected,, hard stop protected the air-conditioning unit in case it is unusual current to occur.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102187418A CN102721155A (en) | 2012-06-28 | 2012-06-28 | Control device and control method for rapidly detecting abnormality of commercial air conditioning water system and protecting commercial air conditioning water system |
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| CN2012102187418A CN102721155A (en) | 2012-06-28 | 2012-06-28 | Control device and control method for rapidly detecting abnormality of commercial air conditioning water system and protecting commercial air conditioning water system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103256689A (en) * | 2013-05-28 | 2013-08-21 | 李智华 | Integrated water route protective device |
| CN104566776A (en) * | 2013-10-28 | 2015-04-29 | 珠海格力电器股份有限公司 | Control method and control device for water-cooling type air conditioning unit and water-cooling type air conditioning unit |
| CN105823120A (en) * | 2016-03-23 | 2016-08-03 | 广东美的暖通设备有限公司 | Fault judging and handling method and system for target current switch of water system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103256689A (en) * | 2013-05-28 | 2013-08-21 | 李智华 | Integrated water route protective device |
| CN104566776A (en) * | 2013-10-28 | 2015-04-29 | 珠海格力电器股份有限公司 | Control method and control device for water-cooling type air conditioning unit and water-cooling type air conditioning unit |
| CN104566776B (en) * | 2013-10-28 | 2017-12-12 | 珠海格力电器股份有限公司 | Control method and control device for water-cooling type air conditioning unit and water-cooling type air conditioning unit |
| CN105823120A (en) * | 2016-03-23 | 2016-08-03 | 广东美的暖通设备有限公司 | Fault judging and handling method and system for target current switch of water system |
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Application publication date: 20121010 |