CN202926369U - Ice blockage preventing and self-defrosting and open type carbon dioxide cooling system - Google Patents
Ice blockage preventing and self-defrosting and open type carbon dioxide cooling system Download PDFInfo
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- CN202926369U CN202926369U CN201220563748.9U CN201220563748U CN202926369U CN 202926369 U CN202926369 U CN 202926369U CN 201220563748 U CN201220563748 U CN 201220563748U CN 202926369 U CN202926369 U CN 202926369U
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Abstract
The utility model belongs to the field of life rescue and environmental control of airtight spaces, and discloses an ice blockage preventing and self-defrosting and open type carbon dioxide cooling system. The ice blockage preventing and self-defrosting and open type carbon dioxide cooling system sequentially carbon dioxide steel cylinders (1), a stop valve (3), a primary-stage throttle valve (4), a primary-stage evaporator (5), a secondary-stage throttle valve (6), a secondary-stage evaporator (7) and a three-way reversing valve (8), wherein a first end of the three-way reversing valve (8) is communicated with the secondary-stage evaporator (7), a second end of the three-way reversing valve (8) is communicated with a pneumatic blower (9), and a third end of the three-way reversing valve (8) is communicated with a compressed air steel cylinder (10). According to the ice blockage preventing and self-defrosting and open type carbon dioxide cooling system, a double-stage throttle and double-stage refrigeration method is adopted, and therefore the evaporating temperature of the primary-stage evaporator (5) and the evaporating temperature of the secondary-stage evaporator (7) are increased, the effect that the evaporating temperatures are above the freezing point of water is guaranteed, and therefore the phenomena of ice blockage of a pipeline and frosting of the evaporators are avoided; and meanwhile, the compressed air steel cylinder (10) is arranged for driving the pneumatic blower (9) to assist in defrosting in extreme circumstances, and therefore the operation reliability of the system is improved.
Description
Technical field
The present invention relates to a kind of Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, belong to confined space safe life-saving and environment control field.
Background technology
Along with the progress and development of science and technology and to the raising of people's life rights and interests consciousness, as after disaster and contingency occur to the protection facility of people's life, the urgent danger prevention system has become the state key problems of concern.The urgent danger prevention system of coal mine mainly contains refuge chamber or survival capsule, escape when it is in danger for mine operation personnel, take refuge and wait for rescue, must possess certain environment and control function to satisfy hedging personnel's survivability requirement, as the refrigeration system of environmental control system important component part, its reliability is directly connected to adjustment and the air purification of refuge chamber or survival capsule confined space.Owing to not needing power supply, can satisfy the requirement of explosion proof of mine harshness, open carbon dioxide refrigerating system becomes the first-selection of refuge chamber and rescue capsule refrigerating mode, has been described in detail as patent 201110043150.7 a kind of non-electric type air conditioning purifier and the method that integrate the refrigeration purification that high-pressure refrigerant drives.Yet, in actual applications, because containing moisture in carbon dioxide, after throttling, temperature is low in addition reaches-50～-60 ℃, be easy to cause pipeline to ice the problems such as stifled and evaporimeter frosting, the reliability and stability of system are relatively poor, demand urgently existing open carbon dioxide refrigerating system is improved.
Summary of the invention
The objective of the invention is for the Special use environment and the requirement that are used for coal mine refuge chamber or mine escape capsule, a kind of dependable performance is provided, the Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system of flexible adjustment, it can flexibility and reliability realize that in refuge chamber, temperature is controlled, and have from defrost function.
For achieving the above object, the present invention has adopted following technical proposal: this Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system is characterized in that comprising successively carbon dioxide steel cylinder, stop valve, one-level choke valve, one-level evaporimeter, two-step throttle valve, secondary evaporimeter; Also comprise a three-way diverter valve; Above-mentioned three-way diverter valve first end is communicated with secondary evaporimeter, and the second end is communicated with pneumatic fan, and the 3rd end is communicated with tank of compressed air.
Described Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, it is characterized in that: above-mentioned one-level evaporimeter and secondary evaporimeter are the capillary type evaporimeter.
Described Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, it is characterized in that: above-mentioned one-level choke valve and two-step throttle valve are the capillary type choke valve.
Described Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system is characterized in that: be provided with counterbalance valve between above-mentioned pneumatic fan and three-way diverter valve.
Described Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system is characterized in that: above-mentioned carbon dioxide steel cylinder surpasses one, and they are connected with stop valve by the carbon dioxide bus-bar.
Described Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system is characterized in that: above-mentioned tank of compressed air surpasses one, and they are connected with the 3rd end of three-way diverter valve by the air bus-bar.
The refrigerating method of described Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system comprises following process: the first end of three-way diverter valve and the second end are communicated; High normal pressure and temperature carbon dioxide liquid in carbon dioxide steel cylinder is forced down warm carbon dioxide liquid in becoming after the one-level of flowing through choke valve; After air heat exchange in one-level evaporimeter and cabin, become the carbon dioxide of middle normal pressure and temperature; The carbon dioxide of middle normal pressure and temperature becomes the carbon dioxide of low-pressure low-temperature after the two-step throttle valve of flowing through; After in secondary evaporimeter and cabin, gas is realized exchange heat, become the carbon dioxide of low normal pressure and temperature; The carbon dioxide of low normal pressure and temperature is discharged out of my cabin afterwards through first end, the second end rear drive pneumatic fan of three-way diverter valve; The exchange heat of gas and one-level evaporimeter and secondary evaporimeter in pneumatic fan drive cabin; The regulation that the evaporating pressure of above-mentioned one-level evaporimeter and evaporating temperature are regulated by one-level choke valve and one-level evaporimeter self pressure drop, make carbon dioxide liquid temperature after one-level choke valve (4) higher than 0 ℃, thereby prevent the stifled and one-level evaporimeter frosting of pipeline ice; The pressure and temperature of above-mentioned secondary evaporimeter (7) is regulated by two-step throttle valve opening and secondary evaporimeter self pressure drop, thereby makes its temperature higher than 0 ℃, prevents that secondary evaporimeter frosting and pipeline ice is stifled; If frosting appears in above-mentioned evaporimeter, the 3rd end of three-way diverter valve, the second end are communicated, the connection tank of compressed air (, the compressed air-driven pneumatic fan carries out evaporator defrost, after defrosting, restarts refrigeration system.
The Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, due to the measure of having taked second throttle and two-stage refrigeration, improved the evaporating temperature of one-level evaporimeter and secondary evaporimeter, guarantee evaporating temperature higher than the freezing point of water, thereby prevented that pipeline ice from blocking up and the generation of evaporimeter device frost; By tank of compressed air is set, in order to drive pneumatic fan, carry out the assisting defrosting under extreme case simultaneously, improved system's reliability of operation.
Description of drawings
Fig. 1 is anti-icing stifled from the open carbon dioxide refrigerating system schematic diagram of frost removal type;
Fig. 2 is for increasing the anti-icing stifled from the open carbon dioxide refrigerating system schematic diagram of frost removal type of counterbalance valve.
Label title in figure: 1. carbon dioxide steel cylinder, 2. carbon dioxide bus-bar, 3. stop valve, 4. one-level choke valve, 5. one-level evaporimeter, 6. two-step throttle valve, 7. secondary evaporimeter, 8. three-way diverter valve, 9. pneumatic fan, 10. tank of compressed air, 11. air bus-bars, 12. counterbalance valves.
The specific embodiment
As shown in drawings, the present invention comprises carbon dioxide steel cylinder 1, stop valve 3, one-level choke valve 4, one-level evaporimeter 5, two-step throttle valve 6, secondary evaporimeter 7 successively; Also comprise a three-way diverter valve 8; Above-mentioned three-way diverter valve 8 first ends are communicated with secondary evaporimeter 7, the second ends and are communicated with pneumatic fan 9, the three ends connection tank of compressed air 10.Described Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, above-mentioned one-level evaporimeter 5 and secondary evaporimeter 7 are the capillary type evaporimeter.Above-mentioned one-level choke valve 4 and two-step throttle valve 6 are the capillary type choke valve.Be provided with counterbalance valve 12 between above-mentioned pneumatic fan 9 and three-way diverter valve 8.Above-mentioned carbon dioxide steel cylinder 1 surpasses one, and they are connected with stop valve 3 by carbon dioxide bus-bar 2.Above-mentioned tank of compressed air 10 surpasses one, and they are connected with the 3rd end of three-way diverter valve 8 by air bus-bar 11.
The refrigerating method of described Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system comprises following process: the first end of three-way diverter valve 8 and the second end are communicated; High normal pressure and temperature carbon dioxide liquid in carbon dioxide steel cylinder 1 is forced down warm carbon dioxide liquid in becoming after the one-level of flowing through choke valve 4; After air heat exchange in one-level evaporimeter 5 and cabin, become the carbon dioxide of middle normal pressure and temperature; The carbon dioxide of middle normal pressure and temperature becomes the carbon dioxide of low-pressure low-temperature after the two-step throttle valve 6 of flowing through; After in secondary evaporimeter 7 and cabin, gas is realized exchange heat, become the carbon dioxide of low normal pressure and temperature; The carbon dioxide of low normal pressure and temperature is discharged out of my cabin afterwards through first end, the second end rear drive pneumatic fan 9 of three-way diverter valve 8; Pneumatic fan 9 drives the exchange heat of gas and one-level evaporimeter 5 and secondary evaporimeter 7 in the cabin; The regulation that the evaporating pressure of above-mentioned one-level evaporimeter 5 and evaporating temperature are regulated by one-level choke valve 4 and one-level evaporimeter 5 self pressure drop, make carbon dioxide liquid temperature after one-level choke valve 4 higher than 0 ℃, thereby prevent stifled and one-level evaporimeter 5 frostings of pipeline ice; The pressure and temperature of above-mentioned secondary evaporimeter 7 is regulated by two-step throttle valve 6 apertures and secondary evaporimeter 7 self pressure drop, thereby makes its temperature higher than 0 ℃, prevents that secondary evaporimeter 7 frostings and pipeline ice is stifled; If frosting appears in above-mentioned evaporimeter, the 3rd end of three-way diverter valve 8, the second end are communicated, connect tank of compressed air 10, compressed air-driven pneumatic fan 9, pneumatic fan 9 drives gas in the cabin, carries out evaporator defrost, after defrosting, restart refrigeration system.
When the Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system moves, highly pressurised liquid in carbon dioxide steel cylinder successively passes through one-level choke valve, one-level evaporimeter, two-step throttle valve and secondary evaporimeter, cooling by second throttle and two-stage, realized the matched well of pressure drop distribution and cryogenic temperature.Because one-level evaporimeter and secondary evaporimeter are the slim pipe diameter evaporimeter, also have certain pressure drop distribution and self-regulating function.In view of the difference of different environments for use to the cryogenic temperature demand, can distribute according to the actual conditions design pressure drop, the pressure drop distribution system can be taked series, parallel or connection in series-parallel mixed arrangement.This system has with existing mine escape capsule refrigeration system and compares, outstanding advantages such as having good refrigeration effect, use flexibly, reliability is high.
Claims (6)
1. an Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, is characterized in that: comprise successively carbon dioxide steel cylinder (1), stop valve (3), one-level choke valve (4), one-level evaporimeter (5), two-step throttle valve (6), secondary evaporimeter (7);
Also comprise a three-way diverter valve (8);
Above-mentioned three-way diverter valve (8) first end is communicated with secondary evaporimeter (7), and the second end is communicated with pneumatic fan (9), and the 3rd end is communicated with tank of compressed air (10).
2. Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating according to claim 1 system, it is characterized in that: above-mentioned one-level evaporimeter (5) and secondary evaporimeter (7) are the capillary type evaporimeter.
3. Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating according to claim 1 system, it is characterized in that: above-mentioned one-level choke valve (4) and two-step throttle valve (6) are the capillary type choke valve.
4. Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating according to claim 1 system, is characterized in that: be provided with counterbalance valve (12) between above-mentioned pneumatic fan (9) and three-way diverter valve (8).
5. Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating according to claim 1 system, it is characterized in that: above-mentioned carbon dioxide steel cylinder (1) surpasses one, and they are connected with stop valve (3) by carbon dioxide bus-bar (2).
6. Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating according to claim 1 system, it is characterized in that: above-mentioned tank of compressed air (10) surpasses one, and they are connected with the 3rd end of three-way diverter valve (8) by air bus-bar (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220563748.9U CN202926369U (en) | 2012-10-31 | 2012-10-31 | Ice blockage preventing and self-defrosting and open type carbon dioxide cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220563748.9U CN202926369U (en) | 2012-10-31 | 2012-10-31 | Ice blockage preventing and self-defrosting and open type carbon dioxide cooling system |
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| CN202926369U true CN202926369U (en) | 2013-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945600A (en) * | 2019-03-06 | 2019-06-28 | 泉州台商投资区百亚网络科技有限公司 | A kind of semiconductor temperature-control micro vacuum freeze drier |
-
2012
- 2012-10-31 CN CN201220563748.9U patent/CN202926369U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945600A (en) * | 2019-03-06 | 2019-06-28 | 泉州台商投资区百亚网络科技有限公司 | A kind of semiconductor temperature-control micro vacuum freeze drier |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20141031 |
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