CN103807987A - High-pressure preventing system and high-pressure preventing method for air conditioner - Google Patents
High-pressure preventing system and high-pressure preventing method for air conditioner Download PDFInfo
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Abstract
The invention provides a high-pressure preventing system and a high-pressure preventing method for an air conditioner. The high-pressure preventing system comprises a compressor, a condenser, an evaporator, an outdoor fan, a pressure detection module and a master controller. The pressure detection module comprises a plurality of pressure sensors with different pressure prewarning values, so when the exhaust pressure of the compressor exceeds the pressure prewarning value of one pressure sensor, the pressure detection module feeds back a corresponding pressure prewarning signal to the master controller and then the master controller executes a corresponding pressure-reducing measure according to the pressure prewarning signal. According to the invention, the pressure sensors with different pressure prewarning values are arranged, so that the multistage high-pressure prevention control over the air conditioner is realized; the phenomena of overhigh pressure and shutdown protection caused by overload operation of the air conditioner are effectively controlled, i.e., the shutdown times of the air conditioners are greatly reduced; the refrigerating or heating effect of the air conditioner is improved and further the comfortableness of the air conditioner is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly, relate to the anti-high-pressure system of a kind of air-conditioning and anti-high pressure method.
Background technology
The compressor operating frequency of air-conditioning is higher, and the pressure of gas exhaust piping is just larger.The pressure bearing due to gas exhaust piping is limited, therefore, will cause pipelines from bursting when pressure exceedes its limiting value, even occurs security incident.
In order to prevent the too high danger causing of air-conditioning system pressure at expulsion; conventionally at outdoor machine of air-conditioner, a switching mode pressure sensor is installed; like this; in the time that air-conditioning system running overload causes pressure at expulsion too high; can make the switch of switching mode pressure sensor disconnect, thereby realize the protection shutdown of air-conditioning system.
But above-mentioned measure easily causes air-conditioning frequent shutdown, thereby affect refrigeration or the heating effect of air-conditioning.
Summary of the invention
In view of this; the invention provides the anti-high-pressure system of a kind of air-conditioning and anti-high pressure method, shut down effective control of phenomenon to realize the hypertonia protection that air-conditioning is caused because of running overload, reduce the number of times that air-conditioning is shut down; improve refrigeration or the heating effect of air-conditioning, and then improve the comfortableness of air-conditioning.
The anti-high-pressure system of a kind of air-conditioning, comprising: compressor, condenser, evaporimeter, outdoor fan, pressure detecting module and master controller, and wherein, described pressure detecting module comprises the pressure sensor of multiple different pressures early warning values;
The outlet of described compressor is connected by gas exhaust piping with the entrance of described condenser, and the outlet of described condenser is connected with the entrance of described evaporimeter, and the outlet of described evaporimeter is connected with the entrance of described compressor;
Described pressure detecting module is arranged on described gas exhaust piping, to detect the pressure at expulsion in described compressor operating process;
Described master controller respectively with described pressure detecting module, described compressor is connected with described outdoor fan, in the time that in described pressure detecting module, certain pressure sensor detects that described pressure at expulsion exceeds the pressure early warning value of described pressure sensor, described pressure sensor generates pressure early warning signal output according to described pressure early warning value, described master controller is for obtaining the described pressure early warning signal of described pressure detecting module feedback, and carry out and the corresponding frequency reducing of described pressure early warning signal according to compressor described in the control of described pressure early warning signal, controlling described outdoor fan carries out and the corresponding raising frequency of described pressure early warning signal, to reduce described pressure at expulsion.
Preferably, it is characterized in that,
In the time that described pressure at expulsion exceedes in described pressure detecting module maximum pressure early warning value, described master controller is also for all out of service according to compressor described in the maximum pressure early warning signal control corresponding with described maximum pressure early warning value and described outdoor fan.
Preferably, described compressor is the compressor with multistage frequency-dropping function, and described outdoor fan is the outdoor fan with multistage raising frequency function.
Preferably, described master controller is carried out and the corresponding frequency reducing of described pressure early warning signal according to compressor described in the control of described pressure early warning signal, while controlling described outdoor fan execution with the corresponding raising frequency of described pressure early warning signal, be specially,
Described master controller judges that described pressure early warning signal is first order pressure early warning signal, control described compressor and carry out and the corresponding one-level frequency reducing of described first order pressure early warning signal, control described outdoor fan and carry out and the corresponding one-level raising frequency of described first order pressure early warning signal;
Described master controller judges that described pressure early warning signal is second level pressure early warning signal, control described compressor and carry out and the corresponding secondary frequency reducing of described second level pressure early warning signal, control described outdoor fan and carry out and the corresponding secondary raising frequency of described second level pressure early warning signal;
Wherein, described first order pressure early warning signal is the pressure early warning signal of described pressure at expulsion while exceeding first order pressure early warning value, described second level pressure early warning signal is the pressure early warning signal of described pressure at expulsion while exceeding second level pressure early warning value, and described first order pressure early warning value is less than described second level pressure early warning value.
Preferably, described pressure sensor is switching mode pressure sensor.
The anti-high pressure method of a kind of air-conditioning, is characterized in that, be applied to the anti-high-pressure system of air-conditioning described above, described method comprises step:
In the time that in described pressure detecting module, certain pressure sensor detects that described pressure at expulsion exceeds the pressure early warning value of described pressure sensor, described pressure sensor generates pressure early warning signal output according to described pressure early warning value;
Described master controller obtains the described pressure early warning signal of described pressure detecting module feedback;
Described master controller is carried out and the corresponding frequency reducing of described pressure early warning signal according to compressor described in the control of described pressure early warning signal, controls described outdoor fan and carries out and the corresponding raising frequency of described pressure early warning signal, to reduce described pressure at expulsion.
Preferably, also comprise:
In the time that described pressure at expulsion exceedes in described pressure detecting module maximum pressure early warning value, described master controller is all out of service according to compressor described in the maximum pressure early warning signal control corresponding with described maximum pressure early warning value and described outdoor fan.
Preferably, when described compressor is the compressor with multistage frequency-dropping function, described outdoor fan is while having the outdoor fan of multistage raising frequency function, described, described master controller is carried out and the corresponding frequency reducing of described pressure early warning signal according to compressor described in the control of described pressure early warning signal, control described outdoor fan and carry out and the corresponding raising frequency of described pressure early warning signal, to reduce described pressure at expulsion, specifically comprise:
Described master controller judges that described pressure early warning signal is first order pressure early warning signal, control described compressor and carry out and the corresponding one-level frequency reducing of described first order pressure early warning signal, control described outdoor fan and carry out and the corresponding one-level raising frequency of described first order pressure early warning signal;
Described master controller judges that described pressure early warning signal is second level pressure early warning signal, control described compressor and carry out and the corresponding secondary frequency reducing of described second level pressure early warning signal, control described outdoor fan and carry out and the corresponding secondary raising frequency of described second level pressure early warning signal;
Wherein, described first order pressure early warning signal is the pressure early warning signal of described pressure at expulsion while exceeding first order pressure early warning value, described second level pressure early warning signal is the pressure early warning signal of described pressure at expulsion while exceeding second level pressure early warning value, and described first order pressure early warning value is less than described second level pressure early warning value.
Can find out from above-mentioned technical scheme, the invention provides the anti-high-pressure system of a kind of air-conditioning and anti-high pressure method, the anti-high-pressure system of air-conditioning comprises: compressor, condenser, evaporimeter, outdoor fan, pressure detecting module and master controller, because pressure detecting module comprises the pressure sensor of multiple different pressures early warning values, therefore, in the time that the pressure at expulsion of compressor exceeds the pressure early warning value of certain pressure sensor, pressure detecting module can be fed back corresponding pressure early warning signal to master controller, thereby master controller is carried out corresponding measures to reduce stresses according to pressure early warning signal.Therefore; the present invention is by setting the pressure sensor of multiple different pressures early warning values; realize the multistage anti-high voltage control to air-conditioning; effectively control the phenomenon that hypertonia protection that air-conditioning causes because of running overload is shut down; greatly reduce the shutdown number of times of air-conditioning; thereby improve refrigeration or the heating effect of air-conditioning, and then improved the comfortableness of air-conditioning.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the anti-high-pressure system of the disclosed a kind of air-conditioning of the embodiment of the present invention;
Fig. 2 is the structural representation of the embodiment of the present invention anti-high-pressure system of disclosed a kind of air-conditioning test section;
Fig. 3 is the structural representation of the anti-high-pressure system control section of the disclosed a kind of air-conditioning of the embodiment of the present invention;
Fig. 4 is the flow chart of the anti-high pressure method of the disclosed a kind of air-conditioning of the embodiment of the present invention.
The specific embodiment
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.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, the embodiment of the invention discloses the structural representation of the anti-high-pressure system of a kind of air-conditioning, the anti-high-pressure system of air-conditioning comprises: compressor 11, condenser 12, evaporimeter 18, outdoor fan 13, pressure detecting module 14 and master controller 15, wherein, pressure detecting module 14 comprises the pressure sensor of multiple different pressures early warning values;
The outlet of compressor 11 is connected by gas exhaust piping with the entrance of condenser 12, and the outlet of condenser 12 is connected with the entrance of evaporimeter 18, and the outlet of evaporimeter 18 is connected with the entrance of compressor 11;
In summary it can be seen; the present invention is by setting the pressure sensor of multiple different pressures early warning values; realize the multistage anti-high voltage control to air-conditioning; effectively control the phenomenon that hypertonia protection that air-conditioning causes because of running overload is shut down; greatly reduce the shutdown number of times of air-conditioning; thereby improve refrigeration or the heating effect of air-conditioning, and then improved the comfortableness of air-conditioning.
And the anti-high-pressure system of air-conditioning disclosed by the invention is owing to being set with multiple pressure sensors, therefore, can effectively improve the safety and reliability that air-conditioning uses, reduce because of certain pressure sensor danger causing that lost efficacy.
Wherein, condenser 12 is connected by electric expansion valve 17 with evaporimeter 18.
For convenience of the narration to the anti-high-pressure system operation principle of air-conditioning and to other classification of the anti-hiigh pressure stage of the anti-high-pressure system of air-conditioning, the pressure sensor of different pressures early warning value can be defined as to the pressure sensor of different stage.
Illustrate, referring to Fig. 2, the structural representation of another embodiment of the present invention anti-high-pressure system of disclosed a kind of air-conditioning test section, in the present embodiment, pressure detecting module 14 comprises 3 pressure sensors, so the anti-high-pressure system of air-conditioning in the present embodiment is 3 grades of anti-high-pressure systems, 3 pressure sensors are defined as respectively first class pressure sensor 141, secondary pressure sensor 142 and three stage pressure sensors 143, wherein, the pressure early warning value of first class pressure sensor 141 is less than the pressure early warning value of secondary pressure sensor 142, the pressure early warning value of secondary pressure sensor 142 is less than the pressure early warning value of three stage pressure sensors 143.In the time that certain stage pressure sensor detects that pressure at expulsion exceeds the pressure early warning value of this pressure sensor, this pressure sensor is exported a pressure early warning signal and is fed back to master controller 15, master controller 15 receives pressure early warning signal, and carries out corresponding measures to reduce stresses according to this pressure early warning signal.
Therefore; consider the difference that the different air-conditionings that occasion, different environments for use are installed require anti-high pressure rank; the anti-high-pressure system of air-conditioning provided by the invention can be installed for different demands the anti-high-pressure system of appropriate level; the rank and the quantity that are the pressure sensor of setting in pressure detecting module 14 can be changed according to actual needs; thereby make the scope of application of the anti-high-pressure system of air-conditioning provided by the invention wider, reduced the after-sales service problem causing because of high voltage protective simultaneously.
It should be noted is that, the preferred switching mode pressure sensor of pressure sensor in above-described embodiment, under normal circumstances, the pressure switch of pressure sensors at different levels is all in closure state, in the time that pressure at expulsion exceedes the pressure early warning value of n stage pressure sensor, the pressure switch of n stage pressure sensor disconnects automatically, feed back a switching signal to master controller 15, master controller 15 obtains this switching signal, and carry out corresponding logical action according to this switching signal, control compressor 11 frequency reducings, control outdoor fan 13 raising frequencies, thereby control pressure at expulsion.
Preferably, compressor 11 is for having the compressor of multistage frequency-dropping function, and every grade of frequency reducing amount is corresponding with the pressure sensor of appropriate level.
Referring to Fig. 3, the structural representation of the anti-high-pressure system control section of the disclosed a kind of air-conditioning of another embodiment of the present invention, when master controller 15 is carried out and the corresponding frequency reducing of pressure early warning signal according to pressure early warning signal control compressor 11, while controlling outdoor fan 13 execution with the corresponding raising frequency of pressure early warning signal, detailed process is:
Wherein, described first order pressure early warning signal is the pressure early warning signal (pressure early warning signal that first class pressure sensor 141 feed back) of pressure at expulsion while exceeding first order pressure early warning value, described second level pressure early warning signal is the pressure early warning signal (pressure early warning signal that secondary pressure sensor 142 feed back) of pressure at expulsion while exceeding second level pressure early warning value, and described first order pressure early warning value is less than described second level pressure early warning value.
It should be noted is that, for the security incident of avoiding too high pressure at expulsion to bring air-conditioning, when in pressure at expulsion overpressure detection module 14 when maximum pressure early warning value, master controller 15 is also for all out of service according to described maximum pressure early warning value corresponding maximum pressure early warning signal control compressor 11 and outdoor fan 13.
The embodiment providing in conjunction with Fig. 3, master controller 15 judges that pressure early warning signal is third level pressure early warning signal, compressor 11 controlled by master controller 15 and outdoor fan 13 is carried out stoppage protection, thereby prevents the generation of security incident.
The concrete decompression process of master controller 15 is referring to following embodiment:
Suppose in the present embodiment, pressure detecting module 14 comprises 3 pressure sensors, and the anti-high-pressure system of air-conditioning adopts 3 grades of anti-high-pressure systems, and 3 pressure sensors are respectively first class pressure sensor, and pressure early warning value is 3.5MPa; Secondary pressure sensor, pressure early warning value is 3.9MPa; Three stage pressure sensors, pressure early warning value is 4.2MPa.
In the time that the pressure at expulsion in compressor 11 runnings exceeds 3.5MPa, the pressure switch of first class pressure sensor disconnects, master controller 15 is according to the switching signal of first class pressure sensor feedback, carry out immediately the anti-high pressure action of one-level, control compressor 11 and carry out one-level frequency reducing, compressor 11 for example, is declined according to 10% of goal-selling frequency at Preset Time (40 seconds), and maximum can drop to 70% of goal-selling frequency; Control outdoor fan 13 and carry out raising frequency action, working as under front windshield rotating speed, a windscreen raises;
If one-level safeguard procedures fail to reduce pressure at expulsion, in the time that pressure at expulsion exceeds 3.9MPa, the pressure switch of secondary pressure sensor disconnects, master controller 15 is according to the switching signal of secondary pressure sensor feedback, carry out immediately the anti-high pressure action of secondary, control compressor 11 and carry out secondary frequency reducing, compressor 11 was declined by 20% of goal-selling frequency at 40 seconds, maximum can drop to 50% of goal-selling frequency; Control outdoor fan 13 and carry out raising frequency action, outdoor fan 13 is added immediately and rise to the highest windscreen operation;
When because air-conditioning environment of living in is severe; or the pressure switch of upper level pressure sensor (being secondary pressure sensor in the present embodiment) lost efficacy time; while causing pressure at expulsion to exceed 4.2MPa; master controller 15 is carried out 3 grades of anti-high pressure actions immediately; the anti-high-pressure system of air-conditioning is carried out to system report high voltage protective; control compressor 11 out of service, outdoor fan 13 is out of service, thereby guarantees safety, the reliability service of air-conditioning system.
It should be noted is that, master controller 15 provided by the invention also has anti-high pressure rank adaptation function, and the detection module of master controller 15 is the quantity of pressure sensor and the pressure early warning value of each pressure sensor of actual installation in detected pressures detection module 14 voluntarily.
Concrete, master controller 15 powers in latter 10 seconds, by surface sweeping pressure detecting module 14, can obtain the quantity of pressure sensor in pressure detecting module 14 and the pressure early warning value of each pressure sensor, thereby determine the pressure protection level that the anti-high-pressure system of whole air-conditioning possesses.
For example,, if only two pressure early warning values are installed in pressure detecting module 14 and are respectively the pressure sensor of 3.9MPa and 4.2MPa.After 10 seconds, can automatically to detect the pressure sensor number that pressure detecting module 14 installs be 2 to master controller 15 powering on, and identify corresponding pressure rank, has 3.9MPa and the anti-high pressure ability of 4.2MPa two-stage thereby judge the anti-high-pressure system of this air-conditioning.
It should be noted that, in the various embodiments described above, described gas exhaust piping is refrigerant pipe.
The anti-high-pressure system of air-conditioning also comprises: gas-liquid separator 16(is referring to Fig. 1), gas-liquid separator 16 is connected with compressor 11, evaporimeter 18 respectively, and gas-liquid separator 16 flows into compressor 11 for preventing liquid refrigerant.
Wherein, gas-liquid separator 16 is connected by refrigerant pipe with compressor 11.
Corresponding with the anti-high-pressure system of above-mentioned air-conditioning, the invention also discloses the anti-high pressure method of a kind of air-conditioning.
Referring to Fig. 4, the flow chart of the anti-high pressure method of the disclosed a kind of air-conditioning of the embodiment of the present invention, described method is applied to the anti-high-pressure system of air-conditioning in Fig. 1 embodiment, and described method comprises step:
S41, in the time that certain pressure sensor in pressure detecting module 14 detects that pressure at expulsion exceeds the pressure early warning value of described pressure sensor, described pressure sensor generates pressure early warning signal output according to described pressure early warning value;
S42, master controller 15 obtain the described pressure early warning signal that pressure detecting module 14 is fed back;
S43, master controller 15 are carried out and the corresponding frequency reducing of described pressure early warning signal according to described pressure early warning signal control compressor 11, control outdoor fan 13 and carry out and the corresponding raising frequency of described pressure early warning signal, to reduce described pressure at expulsion.
In summary it can be seen; the present invention is by setting the pressure sensor of multiple different pressures early warning values; realize the multistage anti-high voltage control to air-conditioning; effectively control the phenomenon that hypertonia protection that air-conditioning causes because of running overload is shut down; greatly reduce the shutdown number of times of air-conditioning; thereby improve refrigeration or the heating effect of air-conditioning, and then improved the comfortableness of air-conditioning.
And the anti-high-pressure system of air-conditioning disclosed by the invention is owing to being set with multiple pressure sensors, therefore, can effectively improve the safety and reliability that air-conditioning uses, reduce because of certain pressure sensor danger causing that lost efficacy.
Wherein, the preferred switching mode pressure sensor of pressure sensor in above-described embodiment, under normal circumstances, the pressure switch of pressure sensors at different levels is all in closure state, in the time that pressure at expulsion exceedes the pressure early warning value of n stage pressure sensor, the pressure switch of n stage pressure sensor disconnects automatically, feed back a switching signal to master controller 15, master controller 15 obtains this switching signal, and carry out corresponding logical action according to this switching signal, control compressor 11 frequency reducings, control outdoor fan 13 raising frequencies, thereby control pressure at expulsion.
It should be noted is that, be the security incident of avoiding too high pressure at expulsion to bring air-conditioning, and therefore, on the basis of above-described embodiment, described method also comprises step:
S44, when in pressure at expulsion overpressure detection module 14 when maximum pressure early warning value, master controller 15 is all out of service according to maximum pressure early warning signal control compressor 11 and the outdoor fan 13 corresponding with described maximum pressure early warning value.
Preferably, when compressor 11 is for having the compressor of multistage frequency-dropping function, outdoor fan 13 is that while having the outdoor fan of multistage raising frequency function, step S43, specifically comprises:
S431, master controller 15 judge that pressure early warning signal is first order pressure early warning signal, control compressor 11 and carry out and the corresponding one-level frequency reducing of described first order pressure early warning signal, control outdoor fan 13 and carry out and the corresponding one-level raising frequency of described first order pressure early warning signal;
S432, master controller 15 judge that pressure early warning signal is second level pressure early warning signal, control compressor 11 and carry out and the corresponding secondary frequency reducing of described second level pressure early warning signal, control outdoor fan 13 and carry out and the corresponding secondary raising frequency of described second level pressure early warning signal;
Wherein, described first order pressure early warning signal is the pressure early warning signal (pressure early warning signal that first class pressure sensor 141 feed back) of pressure at expulsion while exceeding first order pressure early warning value, described second level pressure early warning signal is the pressure early warning signal (pressure early warning signal that secondary pressure sensor 142 feed back) of pressure at expulsion while exceeding second level pressure early warning value, and described first order pressure early warning value is less than described second level pressure early warning value.
It should be noted is that, embodiment of the method is corresponding with system embodiment, and therefore, the specific works principle of the each execution step of embodiment of the method, referring to system embodiment, repeats no more herein.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize 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 (8)
1. the anti-high-pressure system of air-conditioning, is characterized in that, comprising: compressor, condenser, evaporimeter, outdoor fan, pressure detecting module and master controller, and wherein, described pressure detecting module comprises the pressure sensor of multiple different pressures early warning values;
The outlet of described compressor is connected by gas exhaust piping with the entrance of described condenser, and the outlet of described condenser is connected with the entrance of described evaporimeter, and the outlet of described evaporimeter is connected with the entrance of described compressor;
Described pressure detecting module is arranged on described gas exhaust piping, to detect the pressure at expulsion in described compressor operating process;
Described master controller respectively with described pressure detecting module, described compressor is connected with described outdoor fan, in the time that in described pressure detecting module, certain pressure sensor detects that described pressure at expulsion exceeds the pressure early warning value of described pressure sensor, described pressure sensor generates pressure early warning signal output according to described pressure early warning value, described master controller is for obtaining the described pressure early warning signal of described pressure detecting module feedback, and carry out and the corresponding frequency reducing of described pressure early warning signal according to compressor described in the control of described pressure early warning signal, controlling described outdoor fan carries out and the corresponding raising frequency of described pressure early warning signal, to reduce described pressure at expulsion.
2. the anti-high-pressure system of air-conditioning according to claim 1, is characterized in that,
In the time that described pressure at expulsion exceedes in described pressure detecting module maximum pressure early warning value, described master controller is also for all out of service according to compressor described in the maximum pressure early warning signal control corresponding with described maximum pressure early warning value and described outdoor fan.
3. the anti-high-pressure system of air-conditioning according to claim 1, is characterized in that, described compressor is the compressor with multistage frequency-dropping function, and described outdoor fan is the outdoor fan with multistage raising frequency function.
4. the anti-high-pressure system of air-conditioning according to claim 3, it is characterized in that, described master controller is carried out and the corresponding frequency reducing of described pressure early warning signal according to compressor described in the control of described pressure early warning signal, while controlling described outdoor fan execution with the corresponding raising frequency of described pressure early warning signal, be specially
Described master controller judges that described pressure early warning signal is first order pressure early warning signal, control described compressor and carry out and the corresponding one-level frequency reducing of described first order pressure early warning signal, control described outdoor fan and carry out and the corresponding one-level raising frequency of described first order pressure early warning signal;
Described master controller judges that described pressure early warning signal is second level pressure early warning signal, control described compressor and carry out and the corresponding secondary frequency reducing of described second level pressure early warning signal, control described outdoor fan and carry out and the corresponding secondary raising frequency of described second level pressure early warning signal;
Wherein, described first order pressure early warning signal is the pressure early warning signal of described pressure at expulsion while exceeding first order pressure early warning value, described second level pressure early warning signal is the pressure early warning signal of described pressure at expulsion while exceeding second level pressure early warning value, and described first order pressure early warning value is less than described second level pressure early warning value.
5. the anti-high-pressure system of air-conditioning according to claim 1, is characterized in that, described pressure sensor is switching mode pressure sensor.
6. the anti-high pressure method of air-conditioning, is characterized in that, is applied to the anti-high-pressure system of air-conditioning claimed in claim 1, and described method comprises step:
In the time that in described pressure detecting module, certain pressure sensor detects that described pressure at expulsion exceeds the pressure early warning value of described pressure sensor, described pressure sensor generates pressure early warning signal output according to described pressure early warning value;
Described master controller obtains the described pressure early warning signal of described pressure detecting module feedback;
Described master controller is carried out and the corresponding frequency reducing of described pressure early warning signal according to compressor described in the control of described pressure early warning signal, controls described outdoor fan and carries out and the corresponding raising frequency of described pressure early warning signal, to reduce described pressure at expulsion.
7. the anti-high pressure method of air-conditioning according to claim 6, is characterized in that, also comprises:
In the time that described pressure at expulsion exceedes in described pressure detecting module maximum pressure early warning value, described master controller is all out of service according to compressor described in the maximum pressure early warning signal control corresponding with described maximum pressure early warning value and described outdoor fan.
8. the anti-high pressure method of air-conditioning according to claim 6, it is characterized in that, when described compressor is the compressor with multistage frequency-dropping function, described outdoor fan is while having the outdoor fan of multistage raising frequency function, described, described master controller is carried out and the corresponding frequency reducing of described pressure early warning signal according to compressor described in the control of described pressure early warning signal, controls described outdoor fan and carries out and the corresponding raising frequency of described pressure early warning signal, to reduce described pressure at expulsion, specifically comprise:
Described master controller judges that described pressure early warning signal is first order pressure early warning signal, control described compressor and carry out and the corresponding one-level frequency reducing of described first order pressure early warning signal, control described outdoor fan and carry out and the corresponding one-level raising frequency of described first order pressure early warning signal;
Described master controller judges that described pressure early warning signal is second level pressure early warning signal, control described compressor and carry out and the corresponding secondary frequency reducing of described second level pressure early warning signal, control described outdoor fan and carry out and the corresponding secondary raising frequency of described second level pressure early warning signal;
Wherein, described first order pressure early warning signal is the pressure early warning signal of described pressure at expulsion while exceeding first order pressure early warning value, described second level pressure early warning signal is the pressure early warning signal of described pressure at expulsion while exceeding second level pressure early warning value, and described first order pressure early warning value is less than described second level pressure early warning value.
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