CN103486687B - The guard method of air-conditioning system and protective device - Google Patents
The guard method of air-conditioning system and protective device Download PDFInfo
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- CN103486687B CN103486687B CN201210193418.XA CN201210193418A CN103486687B CN 103486687 B CN103486687 B CN 103486687B CN 201210193418 A CN201210193418 A CN 201210193418A CN 103486687 B CN103486687 B CN 103486687B
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Abstract
The invention provides a kind of guard method of air-conditioning system, comprise step: 1) detect the pressure value P in the blast pipe of the compressor of air-conditioning system
0; 2) by P
0with the first preset value P
1compare: 3) work as P
0aMP.AMp.Amp gt; P
1time, the outer blower fan of air-conditioning system is out of service.The guard method of above-mentioned air-conditioning system controls the running status of outer blower fan by the force value detected in the blast pipe of the compressor of outer machine, achieve the control of internal machine Guan Wen, therefore achieve the high temperature-proof of air-conditioning system is protected, improve the service life of the compressor of air-conditioning system and the reliability of whole unit; Also reduce the fault rate after sale of air-conditioner set simultaneously.Present invention also offers a kind of protective device of air-conditioning 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 consumer often adopts the interior machine of different manufacturers and the pairing of outer machine to use in use.In order to enable machine in different manufacturers, outer machine compatible and use of arranging in pairs or groups, the control mode of producer's unit when designing all adopts 24V to control, and does not carry out data communication namely between machine and outer machine, adopts 24V to control relatively simple, cost is also lower, also enters to be convenient to sell simultaneously.
But; 24V control mode is existing defects in the operation of protection unit reliability; because interior machine and outer machine cannot obtain the running status of the other side; particularly air-conditioning is when heating operation; because outer machine cannot obtain the Guan Wen of indoor set, when interior machine pipe temperature is too high, unit does not have corresponding high temperature-proof safeguard measure; by the protection of compressor inside self, engine and whole unit thereof can only be protected.But the autoprotection device of compressor, mainly for the protection of the motor of compressor inside, avoids it to be burned, to the harmful effect of compressor and whole unit when not considering that indoor set Guan Wen is higher.Also there is no corresponding high temperature-proof safeguard measure at present, cause the service life of compressor of air conditioner reliability that is lower and whole unit lower, make the fault rate after sale of air-conditioner set higher simultaneously yet.
In addition, the autoprotection device of compressor, when interior machine pipe temperature is too high, can makes high frequent built-in, have impact on the normal use of user, reduce the comfort of air-conditioning.
In sum, how to provide high temperature-proof to protect, with the reliability in the service life and whole unit of improving the compressor of air-conditioning system, reduce the fault rate after sale of air-conditioner set, be current those skilled in the art's problem demanding prompt solution simultaneously.
Summary of the invention
The object of this invention is to provide a kind of guard method of air-conditioning system, realize protecting the high temperature-proof of air-conditioning system, improve the service life of compressor and the reliability of whole unit of air-conditioning system, reduce the fault rate after sale of air-conditioner set simultaneously.
To achieve these goals, the invention provides following technical scheme:
A guard method for air-conditioning system, comprises step:
1) pressure value P in the blast pipe of the compressor of described air-conditioning system is detected
0;
2) by P
0with the first preset value P
1compare;
3) P is worked as
0>P
1time, 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
2time, outer blower fan normally runs,
Work as P
2≤ P
0≤ P
1time, 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
3time, outer blower fan runs with the highest windscreen,
Work as P
3≤ P
0<P
4time, outer blower fan raises windscreen,
Work as P
4≤ P
0<P
5time, outer blower fan maintains works as front windshield,
Work as P
5≤ P
0≤ P
1time, outer blower fan reduces windscreen,
Wherein, when outer blower fan is out of service, outer blower fan reduces windscreen again, then outer blower fan maintains run-stopping status; When outer blower fan runs with the highest windscreen, outer blower fan raises windscreen again, then outer blower fan maintains the highest windscreen running status.
Preferably, in the guard method of above-mentioned air-conditioning system, described 3rd preset value P
3between 1.15MPa-1.65MPa; Described 4th preset value P
4between 1.45MPa-2.0MPa; Described 5th preset value P
5between 1.9MPa-2.5MPa; Described first preset value P
1between 2.5MPa-3.0MPa.
Based on the guard method of the above-mentioned air-conditioning system provided, present invention also offers a kind of protective device of air-conditioning system, comprising:
Pressure detecting module, for detecting the pressure value P in the blast pipe of the compressor of described air-conditioning system
0;
Pressure comparison module, for by P
0with the first preset value P
1compare;
Control module, works as P
0>P
1time, out of service for the outer blower fan 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 that detects
0with the second preset value P
2compare, wherein P
2<P
1;
Described control module also for:
Work as P
0<P
2time, control outer blower fan and normally run,
Work as P
2≤ P
0≤ P
1time, 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 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;
Described control module also for:
Work as P
0<P
3time, control outer blower fan and run with the highest windscreen,
Work as P
3≤ P
0<P
4time, control outer blower fan and raise windscreen,
Work as P
4≤ P
0<P
5time, control the maintenance of outer blower fan and work as front windshield,
Work as P
5≤ P
0≤ P
1time, control outer blower fan and reduce windscreen,
Wherein, when outer blower fan is out of service, controls outer blower fan and reduce windscreen, then control outer blower fan and maintain run-stopping status; When outer blower fan runs with the highest windscreen, control outer blower fan and raise windscreen, then control outer blower fan and maintain the highest windscreen running status.
Based on the guard method of the above-mentioned air-conditioning system provided, present invention also offers the protective device of another air-conditioning system, comprising:
Be arranged at the first normally closed pressure switch on the blast pipe of the compressor of described air-conditioning system, for detecting the pressure value P in described blast pipe
0, and with the first preset value P
1compare, work as P
0>P
1time, the first normally closed pressure switch disconnects;
Control module, for after detecting that the first normally closed pressure switch disconnects, the outer blower fan controlling described air-conditioning system is out of service.
Preferably, in the protective device of above-mentioned air-conditioning system, 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
2time, the first normally closed pressure switch closes,
Work as P
2≤ P
0≤ P
1time, the first normally closed pressure switch maintains current state;
Described control module also for: after detecting that the first normally closed pressure switch is closed, control outer blower fan and normally run.
Preferably, in the protective device of above-mentioned air-conditioning system, 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
3time, the first normally closed pressure switch closes,
Work as P
3≤ P
0≤ P
1time, 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 detecting 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
4time, the second normally closed pressure switch closes,
Work as P
0>P
5time, the second normally closed pressure switch disconnects,
Work as P
4≤ P
0≤ P
5time, 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 second normally closed pressure switch are all closed, control outer blower fan and run with the highest windscreen,
When the first normally closed pressure switch is closed, second normally closedly compress switch when disconnecting, control outer blower fan reduction windscreen,
When the first normally closed pressure switch disconnection, the second normally closed pressure switch close, control outer blower fan and raise 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, then control outer blower fan and maintain run-stopping status; When outer blower fan runs with the highest windscreen, control outer blower fan and raise windscreen, then control outer blower fan and maintain the highest windscreen running status.
The guard method of air-conditioning system provided by the invention; by detecting the force value in the blast pipe of compressor; and according to the force value in blast pipe; control the running status of outer blower fan; thus the heat that the evaporimeter changing air-conditioning system absorbs in air outdoor; change the temperature and pressure of cold-producing medium, and then change the pressure and temperature of cold-producing medium of whole unit, namely achieve the control of internal machine Guan Wen.Concrete, work as P
0>P
2time, outer blower fan is out of service, thus reduces the heat that evaporimeter absorbs in air outdoor, reduces the temperature and pressure of cold-producing medium, and then reduces the pressure and temperature of cold-producing medium of whole unit, namely reduces interior machine Guan Wen.
The guard method of air-conditioning system provided by the invention, the running status of outer blower fan is controlled by the force value detected in the blast pipe of the compressor of outer machine, achieve the control of internal machine Guan Wen, communication is carried out without the need to interior machine and outer machine, meeting machines and outer machine in current great majority can not the situation of communication, compared with prior art, achieves the control of internal machine Guan Wen, namely set up high temperature-proof protection, improve the service life of the compressor of air-conditioning system and the reliability of whole unit; Also reduce the fault rate after sale of air-conditioner set simultaneously.
Simultaneously; the guard method of air-conditioning system provided by the invention, achieves and protects the high temperature-proof of air-conditioning system, and the compressor avoiding air-conditioning system is frequently built-in when interior machine pipe temperature is too high; reduce user and normally use suffered impact, and then improve the comfort of air-conditioning.
The protective device of air-conditioning system provided by the invention; it is the guard method based on air-conditioning system provided by the invention; therefore, the protective device of air-conditioning system provided by the invention has all technique effects of the guard method of above-mentioned air-conditioning system, does not repeat them here herein.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
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 cross valve the 21, first normally closed pressure switch 22, second, compressor 24, outer blower fan 25, evaporimeter 26.
Detailed description of the invention
The embodiment of the present invention one provides a kind of guard method of air-conditioning system, achieves and protects the high temperature-proof of air-conditioning system, and then improves the service life of compressor and the reliability of whole unit of air-conditioning system, reduces the fault rate after sale of air-conditioner set simultaneously.The embodiment of the present invention two and embodiment three additionally 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, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, 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, comprising:
Step S101: detect the pressure value P in the blast pipe of the compressor of air-conditioning system
0;
Because machine in air-conditioning system and outer machine cannot carry out communication, so need indirectly to obtain interior machine Guan Wen by the parameter gathering outer machine, temperature and pressure due to cold-producing medium is certain proportionate relationship, and the temperature of cold-producing medium is higher, its pressure is also higher, so the refrigerant pressure by detecting outer machine.In order to protect compressor and whole unit, being convenient to detected pressures value simultaneously, detecting the pressure value P in the blast pipe of the compressor of outer machine
0, replace detecting interior machine Guan Wen.For the ease of accurately controlling interior machine Guan Wen, generally detect the pressure value P in blast pipe in the exhaust ports of compressor
0.
Step S102: by P
0with the first preset value P
1compare;
By the pressure value P in the blast pipe that detects
0with the first preset value P
1compare.
Step S103: work as P
0>P
1time, the outer blower fan of air-conditioning system is out of service;
The effect of outer blower fan mainly promotes that the evaporimeter of air-conditioning system absorbs the heat in outside air, when outer fan operation, increases the heat that evaporimeter absorbs, improves the temperature and pressure of cold-producing medium; When outer blower fan is out of service, reduce the heat that evaporimeter absorbs, reduce the temperature and pressure of cold-producing medium.Concrete, work as P
0>P
1time, then represent that the temperature and pressure of cold-producing medium is higher, namely, 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; thus machine Guan Wen in reducing, namely avoid interior machine pipe temperature too high, realize high temperature-proof protection.
The guard method of the air-conditioning system that the embodiment of the present invention one provides, the running status of outer blower fan is controlled by the force value detected in the blast pipe of the compressor of outer machine, achieve the control of internal machine Guan Wen, communication is carried out without the need to interior machine and outer machine, meeting machines and outer machine in current great majority can not the situation of communication, compared with prior art, achieves the control of internal machine Guan Wen, namely set up high temperature-proof protection, improve the service life of the compressor of air-conditioning system and the reliability of whole unit; Also reduce the fault rate after sale of air-conditioner set simultaneously.
Simultaneously; the guard method of the air-conditioning system that the embodiment of the present invention one provides, achieves and protects the high temperature-proof of air-conditioning system, and the compressor avoiding air-conditioning system is frequently built-in when interior machine pipe temperature is too high; reduce user and normally use suffered impact, and then improve the comfort of air-conditioning.
In order to ensure the normal operation of air-conditioner set, the guard method of the air-conditioning system that above-described embodiment one provides, needs to control outer blower fan and recovers normal operating condition, can select to work as P
0≤ P
1time, outer blower fan recovers normal operating condition.Preferably, in order to improve the reliability of the guard method of 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
2time, outer blower fan normally runs,
Work as P
2≤ P
0≤ P
1time, outer blower fan maintains current state.
In the guard method of above-mentioned air-conditioning system, outer blower fan normally runs and specifically refers to: outer blower fan normal rotation work runs.Work as P
2≤ P
0≤ P
1time, outer blower fan maintains current state, and wherein current state specifically refers to: when outer blower fan normally runs, and outer blower fan maintains normal operating condition; When outer fan parking, outer blower fan maintains stopped status.
Adopt the guard method of above-mentioned air-conditioning system; the pressure avoided in blast pipe affects the running status of outer blower fan because some other reasons is fluctuated; thus accurately can control the running status of outer blower fan; and then achieve the accurate control of internal machine Guan Wen, improve the reliability of the guard method of above-mentioned air-conditioning system.
In order to optimize technique scheme further, 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
3time, outer blower fan runs with the highest windscreen,
Work as P
3≤ P
0<P
4time, outer blower fan raises windscreen,
Work as P
4≤ P
0<P
5time, outer blower fan maintains works as front windshield,
Work as P
5≤ P
0≤ P
1time, outer blower fan reduces windscreen, and wherein, when outer blower fan is out of service, outer blower fan reduces windscreen again, then outer blower fan maintains run-stopping status; When outer blower fan runs with the highest windscreen, outer blower fan raises windscreen again, then 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, achieves the multiple-rank control of external blower fan, and namely internal machine Guan Wenke gradual control, improves this air-conditioning system guard method to the pressure P in blast pipe
0control accuracy, and then improve 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 reduction windscreen, concrete, outer blower fan raises wind shelves or reduces wind shelves, and namely outer blower fan is provided with third gear, is respectively the most high-grade, low-grade and shutdown shelves.Certainly, can also set up multiple preset value according to the practical operation situation of air-conditioning system, outer blower fan arranges many grades, realizes many grades and controls outer blower fan, improve the control accuracy of the guard method of this air-conditioning system further.
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; 4th preset value P
4between 1.45MPa-2.0MPa; 5th preset value P
5between 1.9MPa-2.5MPa; First preset value P
1between 2.5MPa-3.0MPa.Such as, 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 other values desirable, specifically set according to the actual service condition of air-conditioning system, the embodiment of the present invention is not done this and is limited particularly.
Based on the guard method of the air-conditioning system that above-described embodiment one provides, the embodiment of the present invention two provides a kind of protective device of air-conditioning system, comprising: pressure detecting module, for detecting the pressure value P in the blast pipe of the compressor of air-conditioning system
0; Pressure comparison module, for by P
0with the first preset value P
1compare; Control module, works as P
0>P
1time, out of service for the outer blower fan controlling air-conditioning system.
The protective device of the air-conditioning system that the embodiment of the present invention two provides, detects the pressure value P in the blast pipe of the compressor of outer machine by pressure detecting module
0, compare P by pressure comparison module
0with the first preset value P
1and the running status of outer blower fan is controlled by control module, achieve the control of internal machine Guan Wen, communication is carried out without the need to interior machine and outer machine, meeting machines and outer machine in current great majority can not the situation of communication, compared with prior art, achieve the control of internal machine Guan Wen, namely set up high temperature-proof protection, improve the service life of the compressor of air-conditioning system and the reliability of whole unit; Also reduce the fault rate after sale of air-conditioner set simultaneously.
Simultaneously; the protective device of the air-conditioning system that the embodiment of the present invention two provides, achieves and protects the high temperature-proof of air-conditioning system, and the compressor avoiding air-conditioning system is frequently built-in when interior machine pipe temperature is too high; reduce user and normally use suffered impact, and then improve 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, prioritizing selection, control module is integrated on the pcb board of air-conditioning system.The control mainboard of air-conditioning system is pcb board (printedcircuitboard, printed circuit board).Be convenient to the installation of control module like this, be also convenient to save space simultaneously, reduce the volume of outer machine.
In order to ensure the normal operation of air-conditioner set, the guard method of the air-conditioning system that above-described embodiment two provides, needs to control outer blower fan and recovers normal operating condition, can select to work as P
0≤ P
1time, control module controls outer blower fan and recovers normal operating condition.Preferably, pressure comparison module also for: by the pressure value P in the blast pipe of the compressor of 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
2time, control outer blower fan and normally run, work as P
2≤ P
0≤ P
1time, control outer blower fan and maintain current state.
In the protective device of above-mentioned air-conditioning system, the outer blower fan of control module control normally runs and specifically refers to: control outer blower fan normal rotation work and run.Work as P
2≤ P
0≤ P
1time, control module controls outer blower fan and maintains current state, and wherein current state specifically refers to: when outer blower fan normally runs, and control module controls outer blower fan and maintains normal operating condition; When outer fan parking, control module controls outer blower fan and maintains stopped status.
Adopt the protective device of above-mentioned air-conditioning system; the pressure avoided in blast pipe affects the running status of outer blower fan because some other reasons is fluctuated; thus accurately can control the running status of outer blower fan; and then achieve the accurate control of internal machine Guan Wen, improve the reliability of the protective device of above-mentioned air-conditioning system.
In order to optimize technique scheme further, in the protective device of the air-conditioning system that above-described embodiment two provides, pressure comparison module also for: by the pressure value P in the blast pipe of the compressor of 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
3time, control outer blower fan and run with the highest windscreen, work as P
3≤ P
0<P
4time, control outer blower fan and raise windscreen, work as P
4≤ P
0<P
5time, control the maintenance of outer blower fan and work as front windshield, work as P
5≤ P
0≤ P
1time, control outer blower fan and reduce windscreen, wherein, when outer blower fan is out of service, controls outer blower fan and reduce windscreen, then control outer blower fan and maintain run-stopping status; When outer blower fan runs with the highest windscreen, control outer blower fan and raise windscreen, then control outer blower fan and maintain the highest windscreen running status.
The protective device of above-mentioned air-conditioning system, achieves the multiple-rank control of external blower fan, and namely internally machine Guan Wenke realizes gradual control, improves this air-conditioning system guard method to the pressure P in blast pipe
0control accuracy, and then improve 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 controls outer blower fan and raises wind shelves or reduce windscreen, concrete; outer blower fan raises wind shelves or reduces wind shelves; namely 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 according to the practical operation situation of air-conditioning system, can also set up multiple preset value, and outer blower fan arranges many grades, realizes many grades and controls outer blower fan, improve control accuracy further.
Based on the guard method of the air-conditioning system that above-described embodiment one provides, 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 the compressor 24 of air-conditioning system, for detecting the pressure value P in blast pipe
0, and with the first preset value P
1compare, work as P
0>P
1time, the first normally closed pressure switch 22 disconnects; Control module, for after detecting that the first normally closed pressure switch 22 disconnects, the outer blower fan 25 controlling air-conditioning system is out of service.
The effect of outer blower fan 25 mainly promotes that the evaporimeter 26 of air-conditioning system absorbs the heat in outside air, when outer blower fan 25 runs, increases the heat that evaporimeter 26 absorbs, improves the temperature and pressure of cold-producing medium; When outer blower fan 25 is out of service, 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:
First normally closed pressure switch 22 detects the pressure value P in blast pipe
0, and with the first preset value P
1compare, work as P
0>P
1time, the first normally closed pressure switch 22 disconnects; After control module detects that the first normally closed pressure switch 22 disconnects, the outer blower fan 25 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 signal and indirectly obtain interior machine Guan Wen, avoid the signal of machine 1 in gathering, in obtaining like this, machine pipe temperature is more convenient, quick.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 air-conditioning system that detects
0with the second preset value P
2compare, wherein P
2<P
1, work as P
0<P
2time, the first normally closed pressure switch 22 closes, and works as P
2≤ P
0≤ P
1time, the first normally closed pressure switch 22 maintains current state; Control module also for: after detecting that the first normally closed pressure switch 22 is closed, control outer blower fan 25 and normally run.
In the protective device of above-mentioned air-conditioning system, work as P
2≤ P
0≤ P
1time the first normally closed pressure switch 22 maintain current state, wherein current state specifically refers to: when the first normally closed pressure switch 22 closes, 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 controls the normal operation of outer blower fan 25 and specifically refers to: control outer blower fan 25 normal rotation work and run.Work as P
2≤ P
0≤ P
1time, control module controls outer blower fan 25 and maintains current state, and wherein current state specifically refers to: when outer blower fan 25 normally runs, and control module controls outer blower fan 25 and maintains normal operating condition; When outer blower fan 25 is shut down, control module controls outer blower fan 25 and maintains stopped status.
Adopt the protective device of above-mentioned air-conditioning system; the pressure avoided in blast pipe affects the running status of outer blower fan 25 because some other reasons is fluctuated; thus accurately can control the running status of outer blower fan 25; and then achieve the accurate control of internal machine Guan Wen, improve the reliability of the protective device of above-mentioned air-conditioning system.
In order to point third gear regulates outer blower fan 25, then need to arrange two normally closed pressure switches, in the protective device of the air-conditioning system that above-described embodiment three provides:
First normally closed pressure switch 22 also for: by the pressure value P in the blast pipe of the compressor 24 of air-conditioning system that detects
0with the 3rd preset value P
3compare, work as P
0<P
3time, the first normally closed pressure switch 22 closes, and works as P
3≤ P
0≤ P
1time, 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 detecting 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
4time, the second normally closed pressure switch 23 closes, and works as P
0>P
5time, the second normally closed pressure switch 23 disconnects, and works as P
4≤ P
0≤ P
5time, 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, control outer blower fan 25 to run with high windscreen, when the first normally closed pressure switch 22 closes, second normally closed compress switch disconnect time, control outer blower fan 25 and reduce windscreen, when the first normally closed pressure switch 22 disconnects, when second normally closed pressure switch 23 closes, control outer blower fan 25 and raise windscreen, 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, then control outer blower fan 25 and maintain run-stopping status, when outer blower fan 25 runs with the highest windscreen, control outer blower fan 25 and raise windscreen, then control outer blower fan 25 and maintain the highest windscreen running status.
The protective device of above-mentioned air-conditioning system; point third gear being achieved external blower fan 25 by the first normally closed pressure switch 22 and the second normally closed pressure switch 23 and control module is controlled; i.e. internal machine Guan Wenke gradual control, improves this air-conditioning system guard method to the pressure P in blast pipe
0control accuracy, and then improve 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 controls outer blower fan 25 and raises wind shelves or reduce windscreen, concrete; outer blower fan 25 raises wind shelves or reduces wind shelves; namely 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 according to the practical operation situation of air-conditioning system, can also set up multiple preset value, and outer blower fan 25 arranges many grades, realizes many grades and controls outer blower fan 25, improve control accuracy further.
In the protective device of the air-conditioning system that above-described embodiment three provides, also can arrange multiple normally closed pressure switch, external blower fan 25 realizes many grades of controls, improves the control accuracy of internal machine Guan Wen further.The protective device of above-mentioned air-conditioning system, also can select often to open pressure switch, work as P
0>P
1often open pressure switch to close; Control module, for when detecting that the outer blower fan 25 of control air-conditioning system is out of service after often opening pressure switch closes.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a guard method for air-conditioning system, is characterized in that, comprises step:
1) pressure value P in the blast pipe of the compressor of described air-conditioning system is detected
0;
2) by P
0with the first preset value P
1compare;
3) P is worked as
0>P
1time, 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
2time, outer blower fan normally runs,
Work as P
2≤ P
0≤ P
1time, 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
3time, outer blower fan runs with the highest windscreen,
Work as P
3≤ P
0<P
4time, outer blower fan raises windscreen,
Work as P
4≤ P
0<P
5time, outer blower fan maintains works as front windshield,
Work as P
5≤ P
0≤ P
1time, outer blower fan reduces windscreen,
Wherein, when outer blower fan is out of service, outer blower fan reduces windscreen again, then outer blower fan maintains run-stopping status; When outer blower fan runs with the highest windscreen, outer blower fan raises windscreen again, then 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 3rd preset value P
3between 1.15MPa-1.65MPa; Described 4th preset value P
4between 1.45MPa-2.0MPa; Described 5th preset value P
5between 1.9MPa-2.5MPa; Described first preset value P
1between 2.5MPa-3.0MPa.
5. a protective device for air-conditioning system, is characterized in that, comprising:
Pressure detecting module, for detecting the pressure value P in the blast pipe of the compressor of described air-conditioning system
0;
Pressure comparison module, for by P
0with the first preset value P
1compare;
Control module, works as P
0>P
1time, out of service for the outer blower fan 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 that detects
0with the second preset value P
2compare, wherein P
2<P
1;
Described control module also for:
Work as P
0<P
2time, control outer blower fan and normally run,
Work as P
2≤ P
0≤ P
1time, 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 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;
Described control module also for:
Work as P
0<P
3time, control outer blower fan and run with the highest windscreen,
Work as P
3≤ P
0<P
4time, control outer blower fan and raise windscreen,
Work as P
4≤ P
0<P
5time, control the maintenance of outer blower fan and work as front windshield,
Work as P
5≤ P
0≤ P
1time, control outer blower fan and reduce windscreen,
Wherein, when outer blower fan is out of service, controls outer blower fan and reduce windscreen, then control outer blower fan and maintain run-stopping status; When outer blower fan runs with the highest windscreen, control outer blower fan and raise windscreen, then control outer blower fan and maintain the highest windscreen running status.
8. a protective device for air-conditioning system, is characterized in that, comprising:
Be arranged at the first normally closed pressure switch on the blast pipe of the compressor of described air-conditioning system, for detecting the pressure value P in described blast pipe
0, and with the first preset value P
1compare, work as P
0>P
1time, the first normally closed pressure switch disconnects;
Control module, for after detecting that the first normally closed pressure switch disconnects, the outer blower fan 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,
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
2time, the first normally closed pressure switch closes,
Work as P
2≤ P
0≤ P
1time, the first normally closed pressure switch maintains current state;
Described control module also for: after detecting that the first normally closed pressure switch is closed, control outer blower fan and normally run.
10. the protective device of air-conditioning system according to claim 8, is characterized in that,
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
3time, the first normally closed pressure switch closes,
Work as P
3≤ P
0≤ P
1time, 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 detecting 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
4time, the second normally closed pressure switch closes,
Work as P
0>P
5time, the second normally closed pressure switch disconnects,
Work as P
4≤ P
0≤ P
5time, 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 second normally closed pressure switch are all closed, control outer blower fan and run with the highest windscreen,
When the first normally closed pressure switch is closed, second normally closedly compress switch when disconnecting, control outer blower fan reduction windscreen,
When the first normally closed pressure switch disconnection, the second normally closed pressure switch close, control outer blower fan and raise 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, then control outer blower fan and maintain run-stopping status; When outer blower fan runs with the highest windscreen, control outer blower fan and raise windscreen, then 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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| CN103486687B true CN103486687B (en) | 2015-11-25 |
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| CN110107997B (en) * | 2019-05-28 | 2021-05-25 | 芜湖美智空调设备有限公司 | Control method and device of air conditioner and air conditioner |
| CN111878971A (en) * | 2020-06-30 | 2020-11-03 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
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