CN101368766A - Air conditioner for pressure reducing protection by discharge temperature - Google Patents
Air conditioner for pressure reducing protection by discharge temperature Download PDFInfo
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- CN101368766A CN101368766A CNA2008100299357A CN200810029935A CN101368766A CN 101368766 A CN101368766 A CN 101368766A CN A2008100299357 A CNA2008100299357 A CN A2008100299357A CN 200810029935 A CN200810029935 A CN 200810029935A CN 101368766 A CN101368766 A CN 101368766A
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- magnetic valve
- compressor
- system pipeline
- pressure reducing
- conditioner
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Abstract
The invention provides an air-conditioner which adopts the exhaust temperature to process the decompression protection and comprises an electronic control plate and a refrigerant circulation system pipeline; the refrigerant circulation system pipeline comprises the sequential connection of a compressor, an outdoor condenser, a capillary tube and an indoor evaporator; a decompression protective branch circuit is in parallel connection with both ends of the capillary tube of the refrigerant circulation system pipeline; the decompression protective branch circuit is composed of an auxiliary capillary tube and a first electromagnetic valve which are serially connected with each other; a thermistor is fixedly connected with the exhaust pipe side of the compressor; the thermistor and the first electromagnetic valve are respectively connected with the electronic control plate. The air-conditioner which adopts the exhaust temperature to process the decompression protection has the advantages of effectively reducing the system pressure in the high temperature environment, avoiding the frequent on-off operation of the compressor, ensuring the system to operate normally in high temperature environment, improving the user satisfaction degree, having less improvements on the system pipeline, low manufacturing cost of the whole air-conditioner, being applicable to the regions with ultrahigh outside environment temperature.
Description
Technical field
The present invention is a kind of air conditioner, specifically is to utilize delivery temperature to carry out the air-conditioner of pressure reducing protection, belongs to the improvement technology of existing air-conditioner.
Background technology
Existing air-conditioner, if the too high meeting of outdoor temperature causes refrigeration system pressure excessive, compressor temperature raises and overload protection during refrigeration.
The pressure reducing protection too high for environment temperature or the excessive needs of indoor load carry out; common safeguard measure is a unloading protecting at present; promptly pressure-head switch is set in refrigeration system mesohigh side; compressor shutdown when pressure surpasses setting value; when pressure recovers compressor start just often; can cause the frequent start-stop of compressor so on the one hand, can cause refrigerating capacity to descend on the other hand.In addition; the content of announcing as following Chinese patent formerly; the patent No. 01209742; patent name is the air-conditioner with unloading pressure protection device; its scheme is that the air-conditioner unit comprises evaporimeter, cross valve, compressor, condenser, capillary and the check valve that connects in regular turn; wherein capillary with connect and the uninstall protection device that adopts pipeline to be connected with described compressor, condenser and capillary respectively after described check valve is connected in parallel again with described condenser and capillary.Though above-mentioned patent can be controlled the cold medium flux in the system pipeline, but when under hot environment, using, resistance increases when causing refrigerant to flow through capillary owing to the indoor set thermic load is excessive, and the Energy Efficiency Ratio of system reduces, and long-time use also easily causes the damage of compressor.
Summary of the invention
The objective of the invention is to address the above problem and deficiency; provide a kind of and can under hot environment, realize pressure reducing protection; under the prerequisite of protection system safety, effectively reduce the unlatching number of times of compressor, improve the delivery temperature of utilizing of system's overall refrigerating effect and carry out the air-conditioner of pressure reducing protection.
The technical scheme that realizes the object of the invention is: a kind of air-conditioner that utilizes delivery temperature to carry out pressure reducing protection; include automatically controlled plate and coolant circulating system pipeline; its coolant circulating system pipeline includes compressor, outdoor condenser, capillary, the indoor evaporator that connects successively; capillary two ends at the coolant circulating system pipeline are parallel with the pressure reducing protection branch road; this pressure reducing protection props up the route assisted capillary and first magnetic valve is in series; at the affixed thermistor of compressor exhaust pipe one side, thermistor is connected with automatically controlled plate respectively with first magnetic valve.
In order further to improve the effect of pressure reducing protection of the present invention; in technique scheme, also be provided with second magnetic valve; one end of second magnetic valve is connected between the assisted capillary and first magnetic valve of pressure reducing protection branch road; the other end is connected on the discharge pipe of evaporimeter; simultaneously, second magnetic valve is connected with automatically controlled plate.
Operation principle of the present invention is: under normal temperature conditions, the HTHP refrigerant of discharging from compressor in the coolant circulating system pipeline, when its temperature does not reach the temperature T 1 of setting, described first magnetic valve and second magnetic valve all are in closed condition, refrigerant is discharged after the capillary of flowing through after the condenser condenses from compressor, carry out evaporation and heat-exchange to evaporimeter again, get back to compressor at last.
Move under air-conditioner is in hot environment, system pressure rises rapidly, and delivery temperature raises, and senses when thermistor and feeds back signal to automatically controlled plate after delivery temperature is elevated to T1, and automatically controlled plate is controlled first magnetic valve and opened, and second magnetic valve still cuts out.This moment, a high-pressure side refrigerant part was through assisted capillary and first magnetic valve low-pressure side evaporimeter of flowing through, then the pressure in the system pipeline reduces, delivery temperature reduces, and the temperature of compressor also can correspondingly reduce, thereby guarantees refrigeration system normally operation under hot environment; When thermistor was sensed delivery temperature and is reduced to a certain value T1-X ℃, automatically controlled plate was controlled first closed electromagnetic valve, and then refrigerant will circulate along original pipeline.
When environment temperature very high; thermistor was sensed delivery temperature and is not reduced to T1-X ℃ after first magnetic valve was opened; (compressor temperature of T2 correspondence is lower than the critical value of the unloading protecting temperature of compressor when further being elevated to T2 on the contrary; and T2〉T1); automatically controlled plate is controlled and is closed first magnetic valve after second magnetic valve is opened; this moment, a high-pressure side refrigerant part directly flow back into compressor behind the assisted capillary and second magnetic valve; thereby can reduce the refrigerant pressure of compressor temperature and system pipeline rapidly, continue to guarantee refrigeration system normally operation under hot environment.When thermistor is sensed compressor exhaust temperature and is reduced to T1, automatically controlled plate is controlled and is closed second magnetic valve after first magnetic valve is opened, when thermistor is sensed delivery temperature and is continued to be reduced to T1-X ℃, first magnetic valve controlled by automatically controlled plate and second magnetic valve all cuts out, and refrigerant circulates along original pipeline.
As mentioned above, the present invention has following beneficial effect:
1, the pressure reducing protection branch road of being made up of magnetic valve and assisted capillary can effectively reduce the system pressure under the hot environment, avoids the frequent start-stop of compressor, and the normal operation of assurance system under hot environment improves user's satisfaction.
2, little for the change of system pipeline, the complete machine manufacturing cost is lower.
3, air-conditioner is suitable for externally environment temperature extra high area use.
Description of drawings
Fig. 1 is a principle schematic of the present invention.
Among the figure: compressor 1, thermistor 2, condenser 3, assisted capillary 4, capillary 5, first magnetic valve 6, evaporimeter 7, second magnetic valve 8, automatically controlled plate 9.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further.
As shown in Figure 1; automatically controlled plate 9 and coolant circulating system pipeline have been the present invention includes; its coolant circulating system pipeline is by the compressor 1 that connects successively; outdoor condenser 3; capillary 5; indoor evaporator 7 is formed the closed-loop path; capillary 5 two ends at the coolant circulating system pipeline are parallel with the pressure reducing protection branch road; this pressure reducing protection props up route assisted capillary 4 and first magnetic valve 6 is in series; in system pipeline, also be provided with second magnetic valve 8; one end of second magnetic valve 8 is connected between the assisted capillary 4 and first magnetic valve 6 of pressure reducing protection branch road; the other end is connected on the discharge pipe of evaporimeter 7; blast pipe one face down bonding at compressor 1 connects a thermistor 2, thermistor 2; first magnetic valve 6 is connected with automatically controlled plate 9 respectively with second magnetic valve 8.
When the present invention works: under normal temperature conditions, the HTHP refrigerant of discharging from compressor 1 in the coolant circulating system pipeline, when its temperature does not reach the temperature T 1 of setting, described first magnetic valve 6 and second magnetic valve 8 all are in closed condition, refrigerant is discharged after the capillary 5 of flowing through after condenser 3 condensations from compressor 1, carry out evaporation and heat-exchange to evaporimeter 7 again, get back to compressor at last.
Under being in hot environment, the present invention moves, system pressure rises rapidly, and compressor exhaust temperature raises, and senses when thermistor 2 and feeds back signal to automatically controlled plate 9 after delivery temperature is elevated to T1, automatically controlled plate 9 controls first magnetic valve 6 is opened, and second magnetic valve 8 still cuts out.This moment, a high-pressure side refrigerant part was through assisted capillary 4 and the first magnetic valve 6 low-pressure side evaporimeter 7 of flowing through, then the pressure in the system pipeline reduces, delivery temperature reduces, and the temperature of compressor 1 also can correspondingly reduce, thereby guarantees refrigeration system normally operation under hot environment; When thermistor 2 was sensed delivery temperature and is reduced to a certain value T1-X ℃, automatically controlled plate 9 controls first magnetic valve 6 cut out, and then refrigerant will circulate along original pipeline.
When environment temperature very high; thermistor 2 was sensed delivery temperature and is not reduced to T1-X ℃ after first magnetic valve 6 was opened; (compressor temperature of T2 correspondence is lower than the critical value of the unloading protecting temperature of compressor when further being elevated to T2 on the contrary; and T2〉T1); after opening, automatically controlled plate 9 controls second magnetic valve 8 closes first magnetic valve 6; this moment, a high-pressure side refrigerant part directly flow back into compressor 1 behind the assisted capillary 4 and second magnetic valve 8; thereby can reduce the refrigerant pressure of compressor temperature and system pipeline rapidly, continue to guarantee refrigeration system normally operation under hot environment.When thermistor 2 is sensed compressor 1 delivery temperature and is reduced to T1, after opening, automatically controlled plate 9 controls first magnetic valve 6 closes second magnetic valve 8, when thermistor 2 is sensed delivery temperature and is continued to be reduced to T1-X ℃, automatically controlled plate 9 control first magnetic valves 6 and second magnetic valve 8 are all closed, and refrigerant circulates along original pipeline.
Claims (2)
1. air-conditioner that utilizes delivery temperature to carry out pressure reducing protection; include automatically controlled plate (9) and coolant circulating system pipeline; its coolant circulating system pipeline includes the compressor (1) that connects successively; outdoor condenser (3); capillary (5) and indoor evaporator (7); it is characterized in that: capillary (5) two ends at the coolant circulating system pipeline are parallel with the pressure reducing protection branch road; this pressure reducing protection props up route assisted capillary (4) and first magnetic valve (6) is in series; at compressor (1) the blast pipe affixed thermistor of one side (2), thermistor (2) is connected with automatically controlled plate (9) respectively with first magnetic valve (6).
2. the air-conditioner that utilizes delivery temperature to carry out pressure reducing protection according to claim 1; it is characterized in that: in described coolant circulating system pipeline, also be provided with second magnetic valve (8); one end of second magnetic valve (8) is connected between the assisted capillary (4) and first magnetic valve (6) of pressure reducing protection branch road; the other end is connected on the discharge pipe of evaporimeter (7); simultaneously, second magnetic valve (8) is connected with automatically controlled plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100299357A CN101368766A (en) | 2008-08-01 | 2008-08-01 | Air conditioner for pressure reducing protection by discharge temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100299357A CN101368766A (en) | 2008-08-01 | 2008-08-01 | Air conditioner for pressure reducing protection by discharge temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101368766A true CN101368766A (en) | 2009-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100299357A Pending CN101368766A (en) | 2008-08-01 | 2008-08-01 | Air conditioner for pressure reducing protection by discharge temperature |
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| Country | Link |
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| CN (1) | CN101368766A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734990A (en) * | 2012-06-21 | 2012-10-17 | 上海三电冷机有限公司 | Method for reducing exhaust pressure of CO2 compressor at initial startup stage and CO2 refrigerating unit |
| CN105276882A (en) * | 2015-10-15 | 2016-01-27 | 珠海格力电器股份有限公司 | Exhaust gas temperature control method for condensing unit |
| CN110590112A (en) * | 2019-08-30 | 2019-12-20 | 广东申菱环境系统股份有限公司 | Air-cooled closed sludge drying system and temperature control method thereof |
-
2008
- 2008-08-01 CN CNA2008100299357A patent/CN101368766A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734990A (en) * | 2012-06-21 | 2012-10-17 | 上海三电冷机有限公司 | Method for reducing exhaust pressure of CO2 compressor at initial startup stage and CO2 refrigerating unit |
| CN105276882A (en) * | 2015-10-15 | 2016-01-27 | 珠海格力电器股份有限公司 | Exhaust gas temperature control method for condensing unit |
| CN110590112A (en) * | 2019-08-30 | 2019-12-20 | 广东申菱环境系统股份有限公司 | Air-cooled closed sludge drying system and temperature control method thereof |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090218 |