CN103486687A - Protection method and protection device of air conditioner system - Google Patents
Protection method and protection device of air conditioner system Download PDFInfo
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- CN103486687A CN103486687A CN201210193418.XA CN201210193418A CN103486687A CN 103486687 A CN103486687 A CN 103486687A CN 201210193418 A CN201210193418 A CN 201210193418A CN 103486687 A CN103486687 A CN 103486687A
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Abstract
The invention provides a protection method of an air conditioner system. The method comprises the following steps that (1) the pressure value P0 inside an exhaust pipe of a compressor of the air conditioner system is detected; (2) P0 is compared with a first preset value P1; (3) when P0 is greater than P1, the operation of an outer fan of the air conditioner system stops. According to the protection method of the air conditioner system, the operation state of the outer fan is controlled through detecting the pressure value inside the exhaust pipe of the compressor of an outdoor unit, and the control on the pipe temperature of an indoor unit is realized, so the high-temperature-prevention protection on the air conditioner system is realized, the service life of the compressor of the air conditioner system is prolonged, the reliability of the whole machine unit is improved, and meanwhile, the after-sale fault rate of the air conditioner unit is also reduced. The invention also provides a protection device of the air conditioner system.
Description
Technical field
The present invention relates to air-conditioning system high temperature protection technical field, more particularly, relate to a kind of guard method and protective device of air-conditioning system.
Background technology
Along with industry and economic fast development, air-conditioning is widely used gradually.Air-conditioning is divided into interior machine and outer machine, and the consumer tends to adopt the interior machine of different manufacturers and the pairing of outer machine to use in use.For the interior machine that makes different manufacturers, outer machine can use in compatible also collocation, the control mode of producer's unit when design all adopts 24V to control, and between interior machine and outer machine, does not carry out data communication, adopts 24V to control relatively simple, cost is also lower, also advances to be convenient to sell simultaneously.
Yet; there is defect in the 24V control mode aspect the operation of protection unit reliability; because interior machine and outer machine can't obtain the other side's running status; particularly air-conditioning is when heating operation; because outer machine can't obtain the Guan Wen of indoor set, when interior machine pipe temperature is too high, the not corresponding anti-high temperature protection measure of unit; can only, by the protection of compressor inside self, protect engine and whole unit thereof.But the autoprotection device of compressor, mainly for the protection of the motor of compressor inside, avoid it to be burned, do not consider when indoor set Guan Wen is higher the harmful effect to compressor and whole unit.Also not corresponding anti-high temperature protection measure at present, cause that service life of compressor of air conditioner is lower and reliability whole unit is lower, also makes the fault rate after sale of air-conditioning unit higher simultaneously.
In addition, the autoprotection device of compressor, when interior machine pipe temperature is too high, can make high frequent built-in, has affected user's normal use, has reduced the comfort of air-conditioning.
In sum, how providing anti-high temperature protection, with the service life of the compressor that improves air-conditioning system and the reliability of whole unit, reduce the fault rate after sale of air-conditioning unit simultaneously, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
The purpose of this invention is to provide a kind of guard method of air-conditioning system, realize the anti-high temperature protection to air-conditioning system, improve service life of compressor of air-conditioning system and the reliability of whole unit, reduce the fault rate after sale of air-conditioning unit simultaneously.
To achieve these goals, the invention provides following technical scheme:
A kind of guard method of air-conditioning system comprises step:
1) detect the interior pressure value P of blast pipe of the compressor of described air-conditioning system
0;
2) by P
0with the first preset value P
1compare;
3) work as P
0p
1the time, the outer blower fan of described air-conditioning system is out of service.
Preferably, in the guard method of above-mentioned air-conditioning system, described step 2) also comprise: by P
0with the second preset value P
2compare, wherein P
2<P
1;
Described step 3) also comprises:
Work as P
0<P
2the time, outer blower fan normally moves,
Work as P
2≤ P
0≤ P
1the time, outer blower fan maintains current state.
Preferably, in the guard method of above-mentioned air-conditioning system, described step 2) also comprise: by P
0respectively with the 3rd preset value P
3, the 4th preset value P
4with the 5th preset value P
5compare, wherein P
3<P
4<P
5<P
1;
Described step 3) also comprises:
Work as P
0<P
3the time, outer blower fan moves with the highest windscreen,
Work as P
3≤ P
0<P
4the time, outer blower fan rising windscreen,
Work as P
4≤ P
0<P
5the time, outer blower fan maintains works as front windshield,
Work as P
5≤ P
0≤ P
1the time, outer blower fan reduces windscreen,
Wherein, when outer blower fan is out of service, outer blower fan reduces windscreen again, and outer blower fan maintains run-stopping status; When outer blower fan during with the operation of the highest windscreen, the outer blower fan windscreen that raises again, outer blower fan maintains the highest windscreen running status.
Preferably, in the guard method of above-mentioned air-conditioning system, described the 3rd preset value P
3between 1.15MPa-1.65MPa; Described the 4th preset value P
4between 1.45MPa-2.0MPa; Described the 5th preset value P
5between 1.9MPa-2.5MPa; Described the first preset value P
1between 2.5MPa-3.0MPa.
Guard method based on the above-mentioned air-conditioning system provided, the present invention also provides a kind of protective device of air-conditioning system, comprising:
The pressure detecting module, for detection of the pressure value P in the blast pipe of the compressor of described air-conditioning system
0;
The pressure comparison module, for by P
0with the first preset value P
1compare;
Control module, work as P
0p
1the time, out of service for the outer blower fan of controlling described air-conditioning system.
Preferably, in the protective device of above-mentioned air-conditioning system, described pressure comparison module also for:
By the pressure value P in the described blast pipe detected
0with the second preset value P
2compare, wherein P
2<P
1;
Described control module also for:
Work as P
0<P
2the time, control outer blower fan and normally move,
Work as P
2≤ P
0≤ P
1the time, control outer blower fan and maintain current state.
Preferably, in the protective device of above-mentioned air-conditioning system, described pressure comparison module also for:
By the pressure value P in the described blast pipe detected
0respectively with the 3rd preset value P
3, the 4th preset value P
4with the 5th preset value P
5compare, wherein P
3<P
4<P
5<P
1;
Described control module also for:
Work as P
0<P
3the time, control outer blower fan and move with the highest windscreen,
Work as P
3≤ P
0<P
4the time, control outer blower fan rising windscreen,
Work as P
4≤ P
0<P
5the time, control outer blower fan and maintain and work as front windshield,
Work as P
5≤ P
0≤ P
1the time, control outer blower fan and reduce windscreen,
Wherein, when outer blower fan is out of service, controls outer blower fan and reduce windscreen, control outer blower fan and maintain run-stopping status; When outer blower fan moves with the highest windscreen, control outer blower fan rising windscreen, control outer blower fan and maintain the highest windscreen running status.
Guard method based on the above-mentioned air-conditioning system provided, the present invention also provides the protective device of another air-conditioning system, comprising:
Be arranged at the first normally closed pressure switch on the blast pipe of compressor of described air-conditioning system, for detection of the pressure value P in described blast pipe
0, and with the first preset value P
1compare, work as P
0p
1the time, the first normally closed pressure switch disconnects;
Control module, for after the first normally closed pressure switch disconnection being detected, the outer blower fan of controlling described air-conditioning system is out of service.
Preferably, in the protective device of above-mentioned air-conditioning system, the described first normally closed pressure switch also for: by the pressure value P in the described blast pipe that detects
0with the second preset value P
2compare, wherein P
2<P
1,
Work as P
0<P
2the time, the first normally closed pressure switch closure,
Work as P
2≤ P
0≤ P
1the time, the first normally closed pressure switch maintains current state;
Described control module also for: after the first normally closed pressure switch closure being detected, control outer blower fan and normally move.
Preferably, in the protective device of above-mentioned air-conditioning system, the described first normally closed pressure switch also for: by the pressure value P in the described blast pipe that detects
0with the 3rd preset value P
3compare,
Work as P
0<P
3the time, the first normally closed pressure switch closure,
Work as P
3≤ P
0≤ P
1the time, the first normally closed pressure switch maintains current state;
Described protective device also comprises the second normally closed pressure switch be arranged on described blast pipe, for detection of the pressure value P in described blast pipe
0, and respectively with the 4th preset value P
4with the 5th preset value P
5compare,
Work as P
0<P
4the time, the second normally closed pressure switch closure,
Work as P
0p
5the time, the second normally closed pressure switch disconnects,
Work as P
4≤ P
0≤ P
5the time, the second normally closed pressure switch maintains current state, wherein P
3<P
4<P
5<P
1;
Described control module also for:
When the first normally closed pressure switch and the equal closure of the second normally closed pressure switch, control outer blower fan and move with the highest windscreen,
When the first normally closed pressure switch is closed, the second normally closed compressing switch while disconnecting, controls outer blower fan reduction windscreen,
When the first normally closed pressure switch disconnection, the second normally closed pressure switch closure, control outer blower fan rising windscreen,
When the first normally closed pressure switch and the second normally closed pressure switch all disconnect, control outer blower fan out of service,
Wherein, when outer blower fan is out of service, controls outer blower fan and reduce windscreen, control outer blower fan and maintain run-stopping status; When outer blower fan moves with the highest windscreen, control outer blower fan rising windscreen, control outer blower fan and maintain the highest windscreen running status.
The guard method of air-conditioning system provided by the invention; by the force value in the blast pipe that detects compressor; and according to the force value in blast pipe; control the running status of outer blower fan; thereby the heat that the evaporimeter that changes air-conditioning system absorbs from outdoor air; change the temperature and pressure of cold-producing medium, and then change the pressure and temperature of the cold-producing medium of whole unit, realized the control of internal machine Guan Wen.Concrete, work as P
0p
2the time, outer blower fan is out of service, thereby has reduced the heat that evaporimeter absorbs from outdoor air, has reduced the temperature and pressure of cold-producing medium, and then has reduced the pressure and temperature of the cold-producing medium of whole unit, has reduced interior machine Guan Wen.
The guard method of air-conditioning system provided by the invention, force value in the blast pipe of the compressor by detecting outer machine is controlled the running status of outer blower fan, realized the control of internal machine Guan Wen, carry out communication without interior machine and outer machine, meet the situation that machine and outer machine in most can not communications, compared with prior art, realized the control of internal machine Guan Wen, set up anti-high temperature protection, improved service life of compressor of air-conditioning system and the reliability of whole unit; Also reduced the fault rate after sale of air-conditioning unit simultaneously.
Simultaneously; the guard method of air-conditioning system provided by the invention, realized the anti-high temperature protection to air-conditioning system, avoided the compressor of air-conditioning system frequently built-in when interior machine pipe temperature is too high; reduce the suffered impact of the normal use of user, and then improved the comfort of air-conditioning.
The protective device of air-conditioning system provided by the invention; be based on the guard method of air-conditioning system provided by the invention; therefore, the protective device of air-conditioning system provided by the invention has all technique effects of guard method of above-mentioned air-conditioning system, and this paper does not repeat them here.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic flow sheet of the guard method of the air-conditioning system that Fig. 1 provides for the embodiment of the present invention one;
The part-structure schematic diagram of the protective device of the air-conditioning system that Fig. 2 provides for the embodiment of the present invention three.
In upper Fig. 2:
Interior machine 1, outer machine 2, the normally closed pressure switch 23 of the normally closed pressure switch 22, second of cross valve 21, first, compressor 24, outer blower fan 25, evaporimeter 26.
The specific embodiment
The embodiment of the present invention one provides a kind of guard method of air-conditioning system, has realized the anti-high temperature protection to air-conditioning system, and then has improved service life of compressor of air-conditioning system and the reliability of whole unit, has reduced the fault rate after sale of air-conditioning unit simultaneously.The embodiment of the present invention two and embodiment tri-also provide the guard method of two kinds of air-conditioning systems,
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
Please refer to Fig. 1, the schematic flow sheet of the guard method of the air-conditioning system that Fig. 1 provides for the embodiment of the present invention one.
The guard method of the air-conditioning system that the embodiment of the present invention one provides comprises:
Step S101: the interior pressure value P of blast pipe that detects the compressor of air-conditioning system
0;
Because the interior machine in air-conditioning system and outer machine can't carry out communication, so need to indirectly obtain by the parameter that gathers outer machine interior machine Guan Wen, because the temperature and pressure of cold-producing medium is certain proportionate relationship, and the temperature of cold-producing medium is higher, its pressure is also higher, so by detecting the refrigerant pressure of outer machine.In order to protect compressor and whole unit, be convenient to the detected pressures value simultaneously, detect the interior pressure value P of blast pipe of the compressor of outer machine
0, replace detecting interior machine Guan Wen.For the ease of machine Guan Wen in accurately controlling, generally the exhaust ports at compressor detects the pressure value P in blast pipe
0.
Step S102: by P
0with the first preset value P
1compare;
By the pressure value P in the blast pipe detected
0with the first preset value P
1compare.
Step S103: work as P
0p
1the time, the outer blower fan of air-conditioning system is out of service;
The effect of outer blower fan is mainly to promote the evaporimeter of air-conditioning system to absorb the heat in outside air, when outer blower fan operation, increases the heat that evaporimeter absorbs, and improves the temperature and pressure of cold-producing medium; Out of service when outer blower fan, reduce the heat that evaporimeter absorbs, reduce the temperature and pressure of cold-producing medium.Concrete, work as P
0p
1the time, mean that the temperature and pressure of cold-producing medium is higher, interior machine Guan Wen is higher; need outer blower fan out of service, reduce the heat that evaporimeter absorbs, reduce the temperature and pressure of cold-producing medium; thereby machine Guan Wen in reducing, avoid interior machine pipe temperature too high, realize anti-high temperature protection.
The guard method of the air-conditioning system that the embodiment of the present invention one provides, force value in the blast pipe of the compressor by detecting outer machine is controlled the running status of outer blower fan, realized the control of internal machine Guan Wen, carry out communication without interior machine and outer machine, meet the situation that machine and outer machine in most can not communications, compared with prior art, realized the control of internal machine Guan Wen, set up anti-high temperature protection, improved service life of compressor of air-conditioning system and the reliability of whole unit; Also reduced the fault rate after sale of air-conditioning unit simultaneously.
Simultaneously; the guard method of the air-conditioning system that the embodiment of the present invention one provides, realized the anti-high temperature protection to air-conditioning system, avoided the compressor of air-conditioning system frequently built-in when interior machine pipe temperature is too high; reduce the suffered impact of the normal use of user, and then improved the comfort of air-conditioning.
In order to guarantee the normal operation of air-conditioning unit, the guard method of the air-conditioning system that above-described embodiment one provides, need to control outer blower fan and recover normal operating condition, can select to work as P
0≤ P
1the time, outer blower fan recovers normal operating condition.Preferably, for the reliability of the guard method that improves above-mentioned air-conditioning system, step S102 also comprises: by P
0with the second preset value P
2compare, wherein P
2<P
1;
Step S103 also comprises:
Work as P
0<P
2the time, outer blower fan normally moves,
Work as P
2≤ P
0≤ P
1the time, outer blower fan maintains current state.
In the guard method of above-mentioned air-conditioning system, the normal operation of outer blower fan specifically refers to: outer blower fan normal rotation work operation.Work as P
2≤ P
0≤ P
1the time, outer blower fan maintains current state, and wherein current state specifically refers to: when outer blower fan normally moves, outer blower fan maintains normal operating condition; When outer blower fan is shut down, outer blower fan maintains stopped status.
Adopt the guard method of above-mentioned air-conditioning system; avoided the pressure in blast pipe to affect the running status of outer blower fan because some other reasons is fluctuated; thereby can accurately control the running status of outer blower fan; and then realized the accurate control of internal machine Guan Wen having improved the reliability of the guard method of above-mentioned air-conditioning system.
In order further to optimize technique scheme, in the guard method of the air-conditioning system that the embodiment of the present invention one provides, step S102 also comprises: by P
0respectively with the 3rd preset value P
3, the 4th preset value P
4with the 5th preset value P
5compare, wherein P
3<P
4<P
5<P
1;
Step S103 also comprises:
Work as P
0<P
3the time, outer blower fan moves with the highest windscreen,
Work as P
3≤ P
0<P
4the time, outer blower fan rising windscreen,
Work as P
4≤ P
0<P
5the time, outer blower fan maintains works as front windshield,
Work as P
5≤ P
0≤ P
1the time, outer blower fan reduces windscreen, and wherein, when outer blower fan is out of service, outer blower fan reduces windscreen again, and outer blower fan maintains run-stopping status; When outer blower fan during with the operation of the highest windscreen, the outer blower fan windscreen that raises again, outer blower fan maintains the highest windscreen running status.
The guard method of the air-conditioning system that the embodiment of the present invention one provides, realized that the stepping of external blower fan is controlled, and internally machine Guan Wenke controls step by step, has improved this air-conditioning system guard method to the pressure P in blast pipe
0control accuracy, and then improved the control accuracy of internal machine Guan Wen.
In the guard method of the air-conditioning system that the embodiment of the present invention one provides, outer blower fan rising wind shelves or reduce windscreen, concrete, raise wind shelves or reduce wind shelves of outer blower fan, outer blower fan is provided with third gear, is respectively the most high-grade, low-grade and shut down grade.Certainly, can also set up a plurality of preset values according to the practical operation situation of air-conditioning system, outer blower fan arranges many grades, realizes the outer blower fan of many grades of controls, further improves the control accuracy of the guard method of this air-conditioning system.
Preferably, in the guard method of the air-conditioning system that above-described embodiment one provides, the 3rd preset value P
3between 1.15MPa-1.65MPa; The 4th preset value P
4between 1.45MPa-2.0MPa; The 5th preset value P
5between 1.9MPa-2.5MPa; The first preset value P
1between 2.5MPa-3.0MPa.For example, the 3rd preset value P
3for 1.3MPa, the 4th preset value P
4for 1.6MPa, the 5th preset value P
5for 2.1MPa, the first preset value P
1for 2.7MPa.Certainly, the 3rd preset value P
3, the 4th preset value P
4, the 5th preset value P
5with the first preset value P
1also desirable other values, specifically set according to the actual service condition of air-conditioning system, and the embodiment of the present invention is not done this particularly and limited.
The guard method of the air-conditioning system provided based on above-described embodiment one, the embodiment of the present invention two provides a kind of protective device of air-conditioning system, comprising: the pressure detecting module, for detection of the pressure value P in the blast pipe of the compressor of air-conditioning system
0; The pressure comparison module, for by P
0with the first preset value P
1compare; Control module, work as P
0p
1the time, out of service for the outer blower fan of controlling air-conditioning system.
The protective device of the air-conditioning system that the embodiment of the present invention two provides, detect the pressure value P in the blast pipe of compressor of outer machine by the pressure detecting module
0, by the pressure comparison module, compare P
0with the first preset value P
1and the running status of controlling outer blower fan by control module, realized the control of internal machine Guan Wen, carry out communication without interior machine and outer machine, meet the situation that machine and outer machine in most can not communications, compared with prior art, realize the control of internal machine Guan Wen, set up anti-high temperature protection, improved service life of compressor of air-conditioning system and the reliability of whole unit; Also reduced the fault rate after sale of air-conditioning unit simultaneously.
Simultaneously; the protective device of the air-conditioning system that the embodiment of the present invention two provides, realized the anti-high temperature protection to air-conditioning system, avoided the compressor of air-conditioning system frequently built-in when interior machine pipe temperature is too high; reduce the suffered impact of the normal use of user, and then improved the comfort of air-conditioning.
For the ease of installation and the setting of control module, in the protective device of the air-conditioning system that above-described embodiment two provides, the preferential selection, control module is integrated on the pcb board of air-conditioning system.The control mainboard of air-conditioning system is pcb board (printed circuit board, printed circuit board).Be convenient to like this installation of control module, also be convenient to save space, reduce the volume of outer machine simultaneously.
In order to guarantee the normal operation of air-conditioning unit, the guard method of the air-conditioning system that above-described embodiment two provides, need to control outer blower fan and recover normal operating condition, can select to work as P
0≤ P
1the time, control module is controlled outer blower fan and is recovered normal operating condition.Preferably, the pressure comparison module also for: by the pressure value P in the blast pipe of the compressor of the air-conditioning system that detects
0with the second preset value P
2compare, wherein P
2<P
1; Control module also for: work as P
0<P
2the time, control outer blower fan and normally move, work as P
2≤ P
0≤ P
1the time, control outer blower fan and maintain current state.
In the protective device of above-mentioned air-conditioning system, control module is controlled the normal operation of outer blower fan and is specifically referred to: control outer blower fan normal rotation work operation.Work as P
2≤ P
0≤ P
1the time, control module is controlled outer blower fan and is maintained current state, and wherein current state specifically refers to: when outer blower fan normally moves, control module is controlled outer blower fan and is maintained normal operating condition; When outer blower fan is shut down, control module is controlled outer blower fan and is maintained stopped status.
Adopt the protective device of above-mentioned air-conditioning system; avoided the pressure in blast pipe to affect the running status of outer blower fan because some other reasons is fluctuated; thereby can accurately control the running status of outer blower fan; and then realized the accurate control of internal machine Guan Wen, improved the reliability of the protective device of above-mentioned air-conditioning system.
In order further to optimize technique scheme, in the protective device of the air-conditioning system that above-described embodiment two provides, the pressure comparison module also for: by the pressure value P in the blast pipe of the compressor of the described air-conditioning system that detects
0respectively with the 3rd preset value P
3, the 4th preset value P
4with the 5th preset value P
5compare, wherein P
3<P
4<P
5<P
1; Control module also for: work as P
0<P
3the time, control outer blower fan and move with the highest windscreen, work as P
3≤ P
0<P
4the time, control outer blower fan rising windscreen, work as P
4≤ P
0<P
5the time, control outer blower fan and maintain and work as front windshield, work as P
5≤ P
0≤ P
1the time, control outer blower fan and reduce windscreen, wherein, when outer blower fan is out of service, controls outer blower fan and reduce windscreen, control outer blower fan and maintain run-stopping status; When outer blower fan moves with the highest windscreen, control outer blower fan rising windscreen, control outer blower fan and maintain the highest windscreen running status.
The protective device of above-mentioned air-conditioning system, realized that the stepping of external blower fan is controlled, and internally machine Guan Wenke realizes controlling step by step, has improved this air-conditioning system guard method to the pressure P in blast pipe
0control accuracy, and then improved the control accuracy of internal machine Guan Wen.
In the protective device of the air-conditioning system that the embodiment of the present invention two provides, control module is controlled outer blower fan rising wind shelves or is reduced windscreen, concrete; raise wind shelves or reduce wind shelves of outer blower fan; outer blower fan is provided with third gear, is respectively the most high-grade, low-grade and shutdown shelves.Certainly, the protective device of above-mentioned air-conditioning system can also be set up a plurality of preset values according to the practical operation situation of air-conditioning system, and outer blower fan arranges many grades, realizes the outer blower fan of many grades of controls, further improves control accuracy.
The guard method of the air-conditioning system provided based on above-described embodiment one, the embodiment of the present invention three provides the protective device of another air-conditioning system.Please refer to Fig. 2, a kind of part-structure schematic diagram of the protective device of the air-conditioning system that Fig. 2 provides for the embodiment of the present invention three.
The protective device of the air-conditioning system that the embodiment of the present invention three provides comprises: be arranged at the first normally closed pressure switch 22 on the blast pipe of compressor 24 of air-conditioning system, for detection of the pressure value P in blast pipe
0, and with the first preset value P
1compare, work as P
0p
1the time, the first normally closed pressure switch 22 disconnects; Control module, for after the first normally closed pressure switch 22 disconnections being detected, the outer blower fan 25 of controlling air-conditioning system is out of service.
The effect of outer blower fan 25 is mainly the heat that promotes that the evaporimeter of air-conditioning system 26 absorbs in outside air, when outer blower fan 25 operation, increases the heat that evaporimeter 26 absorbs, and improves the temperature and pressure of cold-producing medium; Out of service when outer blower fan 25, reduce the heat that evaporimeter 26 absorbs, reduce the temperature and pressure of cold-producing medium.
The course of work of the protective device of the air-conditioning system that above-described embodiment three provides is as follows:
The pressure value P that the first normally closed pressure switch 22 detects in blast pipe
0, and with the first preset value P
1compare, work as P
0p
1the time, the first normally closed pressure switch 22 disconnects; After control module detects the first normally closed pressure switch 22 disconnections, the outer blower fan 25 of controlling air-conditioning system is out of service.
In the protective device of the air-conditioning system that above-described embodiment three provides, adopt the first normally closed pressure switch 22 to gather outer machine 2 signals and indirectly obtain interior machine Guan Wen, in having avoided gathering, the signal of machine 1, obtain interior machine pipe temperature more convenient, quick like this.The first normally closed pressure switch 22 is generally positioned between the cross valve 21 of compressor 24 and air-conditioning system.
Preferably, in the protective device of the air-conditioning system that above-described embodiment three provides, the first normally closed pressure switch 22 also for: by the pressure value P in the blast pipe of the compressor 24 of the air-conditioning system that detects
0with the second preset value P
2compare, wherein P
2<P
1, work as P
0<P
2the time, the first normally closed pressure switch 22 closures, work as P
2≤ P
0≤ P
1the time, the first normally closed pressure switch 22 maintains current state; Control module also for: after the first normally closed pressure switch 22 closures being detected, control outer blower fan 25 and normally move.
In the protective device of above-mentioned air-conditioning system, work as P
2≤ P
0≤ P
1the time the first normally closed pressure switch 22 maintain current state, wherein current state specifically refers to: when the first normally closed pressure switch 22, when closed, the first normally closed pressure switch 22 maintains closure state; When the first normally closed pressure switch 22 disconnects, the first normally closed pressure switch 22 maintains off-state.
In the protective device of above-mentioned air-conditioning system, control module is controlled the normal operation of outer blower fan 25 and is specifically referred to: control outer blower fan 25 normal rotation work operations.Work as P
2≤ P
0≤ P
1the time, control module is controlled outer blower fan 25 and is maintained current state, and wherein current state specifically refers to: when outer blower fan 25 normal operation, control module is controlled outer blower fan 25 and is maintained normal operating condition; When outer blower fan 25 is shut down, control module is controlled outer blower fan 25 and is maintained stopped status.
Adopt the protective device of above-mentioned air-conditioning system; avoided the pressure in blast pipe to affect the running status of outer blower fan 25 because some other reasons is fluctuated; thereby can accurately control the running status of outer blower fan 25; and then realized the accurate control of internal machine Guan Wen, improved the reliability of the protective device of above-mentioned air-conditioning system.
Regulate outer blower fan 25 for minute third gear, need to arrange two normally closed pressure switches, in the protective device of the air-conditioning system that above-described embodiment three provides:
The first normally closed pressure switch 22 also for: by the pressure value P in the blast pipe of the compressor 24 of the air-conditioning system that detects
0with the 3rd preset value P
3compare, work as P
0<P
3the time, the first normally closed pressure switch 22 closures, work as P
3≤ P
0≤ P
1the time, the first normally closed pressure switch 22 maintains current state;
Protective device also comprises the second normally closed pressure switch 23 be arranged on blast pipe, for detection of the pressure value P in blast pipe
0, and respectively with the 4th preset value P
4with the 5th preset value P
5compare, work as P
0<P
4the time, the second normally closed pressure switch 23 closures, work as P
0p
5the time, the second normally closed pressure switch 23 disconnects, and works as P
4≤ P
0≤ P
5the time, the second normally closed pressure switch 23 maintains current state, wherein P
3<P
4<P
5<P
1;
Control module also for: when the first normally closed pressure switch 22 and the second normally closed pressure switch 23 are all closed, controlling outer blower fan 25 moves with high windscreen, when the first normally closed pressure switch 22 closures, the second normally closed compressing switch while disconnecting, control outer blower fan 25 and reduce windscreen, when the first normally closed pressure switch 22 disconnects, during the second normally closed pressure switch 23 closure, control outer blower fan 25 rising windscreens, when the first normally closed pressure switch 22 and the second normally closed pressure switch 23 all disconnect, control outer blower fan 25 out of service, wherein, when outer blower fan 25 is out of service, control outer blower fan 25 and reduce windscreen, control outer blower fan 25 and maintain run-stopping status, when outer blower fan 25 moves with the highest windscreen, control outer blower fan 25 rising windscreens, control outer blower fan 25 and maintain the highest windscreen running status.
The protective device of above-mentioned air-conditioning system; realized that by the first normally closed pressure switch 22 and the second normally closed pressure switch 23 and control module minute third gear of external blower fan 25 controls; be that internal machine Guan Wenke controls step by step, improved this air-conditioning system guard method to the pressure P in blast pipe
0control accuracy, and then improved the control accuracy of internal machine Guan Wen.
In the protective device of the air-conditioning system that the embodiment of the present invention three provides, control module is controlled outer blower fan 25 rising wind shelves or is reduced windscreen, concrete; raise wind shelves or reduce wind shelves of outer blower fan 25; outer blower fan 25 is provided with third gear, is respectively the most high-grade, low-grade and shutdown shelves.Certainly, the protective device of above-mentioned air-conditioning system can also be set up a plurality of preset values according to the practical operation situation of air-conditioning system, and outer blower fan 25 arranges many grades, realizes the outer blower fan 25 of many grades of controls, further improves control accuracy.
In the protective device of the air-conditioning system that above-described embodiment three provides, a plurality of normally closed pressure switches also can be set, externally blower fan 25 is realized many grades of controls, further improves the control accuracy of internal machine Guan Wen.The protective device of above-mentioned air-conditioning system, also can select often to open pressure switch, works as P
0p
1often open the pressure switch closure; Control module, for out of service when the outer blower fan 25 of controlling air-conditioning system being detected after often opening the pressure switch closure.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the guard method of an air-conditioning system, is characterized in that, comprises step:
1) detect the interior pressure value P of blast pipe of the compressor of described air-conditioning system
0;
2) by P
0with the first preset value P
1compare;
3) work as P
0p
1the time, the outer blower fan of described air-conditioning system is out of service.
2. the guard method of air-conditioning system according to claim 1, is characterized in that,
Described step 2) also comprise: by P
0with the second preset value P
2compare, wherein P
2<P
1;
Described step 3) also comprises:
Work as P
0<P
2the time, outer blower fan normally moves,
Work as P
2≤ P
0≤ P
1the time, outer blower fan maintains current state.
3. the guard method of air-conditioning system according to claim 1, is characterized in that,
Described step 2) also comprise: by P
0respectively with the 3rd preset value P
3, the 4th preset value P
4with the 5th preset value P
5compare, wherein P
3<P
4<P
5<P
1;
Described step 3) also comprises:
Work as P
0<P
3the time, outer blower fan moves with the highest windscreen,
Work as P
3≤ P
0<P
4the time, outer blower fan rising windscreen,
Work as P
4≤ P
0<P
5the time, outer blower fan maintains works as front windshield,
Work as P
5≤ P
0≤ P
1the time, outer blower fan reduces windscreen,
Wherein, when outer blower fan is out of service, outer blower fan reduces windscreen again, and outer blower fan maintains run-stopping status; When outer blower fan during with the operation of the highest windscreen, the outer blower fan windscreen that raises again, outer blower fan maintains the highest windscreen running status.
4. the guard method of air-conditioning system according to claim 3, is characterized in that, described the 3rd preset value P
3between 1.15MPa-1.65MPa; Described the 4th preset value P
4between 1.45MPa-2.0MPa; Described the 5th preset value P
5between 1.9MPa-2.5MPa; Described the first preset value P
1between 2.5MPa-3.0MPa.
5. the protective device of an air-conditioning system, is characterized in that, comprising:
The pressure detecting module, for detection of the pressure value P in the blast pipe of the compressor of described air-conditioning system
0;
The pressure comparison module, for by P
0with the first preset value P
1compare;
Control module, work as P
0p
1the time, out of service for the outer blower fan of controlling described air-conditioning system.
6. the protective device of air-conditioning system according to claim 5, is characterized in that,
Described pressure comparison module also for:
By the pressure value P in the described blast pipe detected
0with the second preset value P
2compare, wherein P
2<P
1;
Described control module also for:
Work as P
0<P
2the time, control outer blower fan and normally move,
Work as P
2≤ P
0≤ P
1the time, control outer blower fan and maintain current state.
7. the protective device of air-conditioning system according to claim 5, is characterized in that,
Described pressure comparison module also for:
By the pressure value P in the described blast pipe detected
0respectively with the 3rd preset value P
3, the 4th preset value P
4with the 5th preset value P
5compare, wherein P
3<P
4<P
5<P
1;
Described control module also for:
Work as P
0<P
3the time, control outer blower fan and move with the highest windscreen,
Work as P
3≤ P
0<P
4the time, control outer blower fan rising windscreen,
Work as P
4≤ P
0<P
5the time, control outer blower fan and maintain and work as front windshield,
Work as P
5≤ P
0≤ P
1the time, control outer blower fan and reduce windscreen,
Wherein, when outer blower fan is out of service, controls outer blower fan and reduce windscreen, control outer blower fan and maintain run-stopping status; When outer blower fan moves with the highest windscreen, control outer blower fan rising windscreen, control outer blower fan and maintain the highest windscreen running status.
8. the protective device of an air-conditioning system, is characterized in that, comprising:
Be arranged at the first normally closed pressure switch on the blast pipe of compressor of described air-conditioning system, for detection of the pressure value P in described blast pipe
0, and with the first preset value P
1compare, work as P
0p
1the time, the first normally closed pressure switch disconnects;
Control module, for after the first normally closed pressure switch disconnection being detected, the outer blower fan of controlling described air-conditioning system is out of service.
9. the protective device of air-conditioning system according to claim 8, is characterized in that,
The described first normally closed pressure switch also for: by the pressure value P in the described blast pipe that detects
0with the second preset value P
2compare, wherein P
2<P
1,
Work as P
0<P
2the time, the first normally closed pressure switch closure,
Work as P
2≤ P
0≤ P
1the time, the first normally closed pressure switch maintains current state;
Described control module also for: after the first normally closed pressure switch closure being detected, control outer blower fan and normally move.
10. the protective device of air-conditioning system according to claim 8, is characterized in that,
The described first normally closed pressure switch also for: by the pressure value P in the described blast pipe that detects
0with the 3rd preset value P
3compare,
Work as P
0<P
3the time, the first normally closed pressure switch closure,
Work as P
3≤ P
0≤ P
1the time, the first normally closed pressure switch maintains current state;
Described protective device also comprises the second normally closed pressure switch be arranged on described blast pipe, for detection of the pressure value P in described blast pipe
0, and respectively with the 4th preset value P
4with the 5th preset value P
5compare,
Work as P
0<P
4the time, the second normally closed pressure switch closure,
Work as P
0p
5the time, the second normally closed pressure switch disconnects,
Work as P
4≤ P
0≤ P
5the time, the second normally closed pressure switch maintains current state, wherein P
3<P
4<P
5<P
1;
Described control module also for:
When the first normally closed pressure switch and the equal closure of the second normally closed pressure switch, control outer blower fan and move with the highest windscreen,
When the first normally closed pressure switch is closed, the second normally closed compressing switch while disconnecting, controls outer blower fan reduction windscreen,
When the first normally closed pressure switch disconnection, the second normally closed pressure switch closure, control outer blower fan rising windscreen,
When the first normally closed pressure switch and the second normally closed pressure switch all disconnect, control outer blower fan out of service,
Wherein, when outer blower fan is out of service, controls outer blower fan and reduce windscreen, control outer blower fan and maintain run-stopping status; When outer blower fan moves with the highest windscreen, control outer blower fan rising windscreen, control outer blower fan and maintain the highest windscreen running status.
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|---|---|---|---|
| CN201210193418.XA CN103486687B (en) | 2012-06-12 | 2012-06-12 | The guard method of air-conditioning system and protective device |
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|---|---|---|---|
| CN201210193418.XA CN103486687B (en) | 2012-06-12 | 2012-06-12 | The guard method of air-conditioning system and protective device |
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| CN103486687A true CN103486687A (en) | 2014-01-01 |
| CN103486687B CN103486687B (en) | 2015-11-25 |
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