CN102778087B - Transcritical CO2 heat pump air heating system and air cooling device - Google Patents
Transcritical CO2 heat pump air heating system and air cooling device Download PDFInfo
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- CN102778087B CN102778087B CN201210238892.XA CN201210238892A CN102778087B CN 102778087 B CN102778087 B CN 102778087B CN 201210238892 A CN201210238892 A CN 201210238892A CN 102778087 B CN102778087 B CN 102778087B
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Abstract
The invention provides an air cooling device for a transcritical CO2 heat pump air heating system. The air cooling device comprises a rectangular shell, wherein an air channel is arranged in the rectangular shell; an air inlet interface and an air outlet interface communicated with the air channel are arranged at both ends of the rectangular shell; the air channel is provided with at least four heat exchanging units in the structural form of finned pipe type heat exchanger at intervals side by side; multiple heat exchanging units are connected in series to form a heat exchanging group by a flange; the heat exchanging units are arranged based on the heat exchanging area; the heat exchanging area of the final heating exchanging unit close to the air inlet interface end is the largest; the ratio of the heat exchanging area of the final heat exchanging unit to the first heat exchanging unit is greater than 3; the air inlet connector of the first heat exchanging unit is the air inlet end of the heat exchanging group; the air outlet connector of the final heat exchanging unit is the air outlet end of the heat exchanging group; and the air inlet end of the heat exchanging group and the air outlet end of the heat exchanging group pass out of the rectangular shell. The device has the advantages of high heating efficiency and strong warming ability. The heat pump air heating system can be used for providing high-temperature air, and has the advantages of low energy consumption and wide application range.
Description
Technical field
The present invention relates to across critical CO
2heat pump field, specifically across critical CO
2heat pump air heating system and be applied to the air cooler of this system.
Background technology
CO
2as the naturally occurring desirable cold-producing medium of a kind of nature, it has nontoxic, non-combustible, and price is low, and the advantage that ozone layer be there is no to destruction, along with the enhancing of people's environmental consciousness, CO
2cold-producing medium more and more receives people's concern, especially at the CO across under critical condition
2in exothermic process, there is larger temperature glide, once the heat absorption feature of this temperature glide and cooling medium, match, just cooling medium can be heated to very high temperature, there is the energy consumption of reduction.
For using air as cooling medium across critical CO
2heat pump, it mainly comprises compressor, air cooler, regenerator, choke valve and evaporimeter, in regenerator, be provided with high-pressure channel and low-pressure channel, the outlet of compressor, air cooler, the high-pressure channel of regenerator, choke valve, evaporimeter, the low-pressure channel of regenerator and the import of compressor are communicated with successively by pipeline, wherein air cooler is generally fin-tube type heat exchanger, it includes the heat exchange fin of some parallel interval and the heat exchanger tube that some ends are communicated with, on heat exchange fin, have the heat exchanger tube perforation of arrangement in a row, heat exchanger tube in a row interts on heat exchange fin through the heat exchanger tube perforation of heat exchange fin, the outside mouth of pipe of one row's heat exchanger tube of the first floor is concentrated to be connected in and on a pipeline, is formed integrated import, the outside mouth of pipe of one row's heat exchanger tube of end layer is concentrated to be connected in and on a pipeline, is formed integrated outlet, integrated import is connected with the outlet of compressor, integrated outlet is connected with the import of regenerator high-pressure channel, after heat pump operation, the CO of low-temp low-pressure
2gas is compressed to supercriticality in compressor, and then flow through air cooler release place heat raise the air themperature of air cooler periphery.Existing this heat pump is subject to the restriction of air cooler exchange capability of heat and air heat absorption feature, have that heat exchange efficiency is low, defect limited in one's ability heats up, generally the temperature of cooling medium air can be risen to 60 ℃, but be difficult to further to raise again, limited using air as cooling medium across critical CO
2the application of heat pump, therefore, is necessary to improve.
Summary of the invention
The present invention is according to across critical CO
2heat transfer characteristic, the heat pump air heating system of air cooler and this air cooler of employing for a kind of transcritical CO_2 heat pump air heating system is proposed, air cooler has the advantages that the efficiency of heating surface is high, intensification ability is strong, heat pump air heating system can provide high temperature air, has advantages of that energy consumption is low, applied range.
Object of the present invention is achieved through the following technical solutions:
Transcritical CO_2 heat pump air heating system air cooler, include rectangular housing, in rectangular housing, it is air channel, the two ends of rectangular housing have air intake interface and the air-out interface being communicated with air channel, in air channel, flat raft interval is provided with at least 3 heat exchange units, each heat exchange unit has inlet suction port and air outlet adapter, with flange, a plurality of heat exchange unit serial connections are become to heat exchange group, each heat exchange unit is arranged according to heat exchange area size order, lean on the heat exchange area maximum of an end heat exchange unit of air intake interface end, an end heat exchange unit is greater than 3 with the ratio of the heat exchange area of first heat exchange unit, first heat exchange unit is arranged in air channel by air-out interface end, its inlet suction port is heat exchange group inlet end, an end heat exchange unit is arranged in air channel near air intake interface end, its air outlet adapter is heat exchange group outlet side, heat exchange group inlet end and heat exchange group outlet side pass outside rectangular housing, and the version of described heat exchange unit is finned tube exchanger structure.
Prioritization scheme, the heat exchange area ratio of adjacent 2 heat exchange units is more than or equal to 1.5.
Application have above-mentioned air cooler across critical CO
2heat pump air heating system, it includes compressor, air cooler, regenerator, choke valve and evaporimeter, in regenerator, be provided with high-pressure channel and low-pressure channel, the low-pressure channel of the high-pressure channel of the outlet of compressor, air cooler, regenerator, choke valve, evaporimeter, regenerator is communicated with into refrigerant circulation loop with the import of compressor successively by pipeline; Described air cooler is above-mentioned transcritical CO_2 heat pump air heating system air cooler, and the heat exchange group inlet end of air cooler is connected with the outlet of compressor, and heat exchange group outlet side connects high-pressure channel one end of regenerator.
Prioritization scheme, is also provided with evaporator fan near evaporimeter; In the air intake interface of air cooler, be also provided with air cooler blower fan.
After heat pump air heating system of the present invention starts, across critical CO
2in the system by pipeline connection, circulate, while flowing through air cooler of the present invention, across critical CO
2air inlet connecting head end by air cooler enters the heat exchange group in housing, and the heat exchange unit increasing progressively through a plurality of heat exchange areas successively, across critical CO
2releases heat step by step; Simultaneously, under the effect of air cooler blower fan, cooling medium (air) is entered in air cooler by the air intake interface of air cooler, the heat exchange unit successively decreasing through a plurality of heat exchange areas successively, every after a heat exchange unit, air themperature raises, and gradually reduces with the temperature difference of next heat exchange unit, thermal resistance in heat transfer process is reduced, effectively improve heat exchange efficiency.Like this, both taken full advantage of CO under across critical condition
2the characteristic of temperature glide during heat release, the thermal resistance problem that while having avoided again heat exchange, the temperature difference causes greatly, by air heat, ranges up to 100 ℃ with low energy consumption.
The present invention has following outstanding substantive distinguishing features and significant progressive:
1, air cooler foundation of the present invention is across CO under critical condition
2at exothermic process, exist the characteristic of temperature glide to carry out grading design, by cascade raising temperature to realize high air-out air themperature;
2, air cooler of the present invention thermal resistance in heat transfer process is little, air with across critical CO
2heat exchanger effectiveness high, realized the object of low energy consumption, high leaving air temp.
Accompanying drawing explanation
Fig. 1 is the structural representation of air cooler of the present invention.
Fig. 2 is the structural representation of heat pump air heating system of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
With reference to figure 1 and Fig. 2, transcritical CO_2 heat pump air heating system air cooler, include rectangular housing 1, in rectangular housing 1, it is air channel 10, the two ends of rectangular housing 1 have air intake interface 11 and the air-out interface 12 being communicated with air channel 10, interior flat raft interval, air channel 10 be provided with 4 heat exchange units 2, the version of heat exchange unit 2 is finned tube exchanger structure, it has inlet suction port and air outlet adapter, with flange 3, the air outlet adapter of a heat exchange unit 2 is connected with the inlet suction port of another heat exchange unit 2 and makes 4 heat exchange units, 2 serial connections become heat exchange group, it is interior near air inlet 11 ends that an end heat exchange unit 2 is arranged at air channel 10, its air outlet adapter is heat exchange group outlet side 22, first heat exchange unit 2 is arranged in air channel 10 by air-out interface 12 ends, its inlet suction port is heat exchange group inlet end 21, heat exchange group inlet end 21 and heat exchange group outlet side 22 pass outside rectangular housing 1, 4 heat exchange units 2 are according to heat exchange area order arrangement from small to large, the ratio equation 5 of end heat exchange unit and the heat exchange area of first heat exchange unit, the heat exchange area of 4 heat exchange units 2 is than being 1:1.5:2.5:5.
Specifically with reference to figure 2, apply above-mentioned air cooler across critical CO
2heat pump air heating system, it includes compressor 4, air cooler, regenerator 5, choke valve 6 and evaporimeter 7, in regenerator 5, be provided with high-pressure channel 51 and low-pressure channel 52, the low-pressure channel 52 of the high-pressure channel 51 of the outlet of compressor 4, air cooler, regenerator 5, choke valve 6, evaporimeter 7, regenerator 5 is communicated with into refrigerant circulation loop with the import of compressor 4 successively by pipeline; Described air cooler is above-mentioned transcritical CO_2 heat pump air heating system air cooler, the heat exchange group inlet end 21 of air cooler is connected with the outlet of compressor 4, heat exchange group outlet side 22 is connected in high-pressure channel 51 one end of regenerator 5, near evaporimeter 7, be provided with evaporator fan 70, in the air intake interface 11 of air cooler, be provided with air cooler blower fan 100.
After the heat pump air heating system of the present embodiment starts, across critical CO
2in the system by pipeline connection, circulate, during the air cooler of the present embodiment of flowing through, across critical CO
2air inlet connecting head end 21 by air cooler enters the heat exchange group in rectangular housing 1, the heat exchange unit 2 increasing progressively through 4 heat exchange areas successively, and heat exchange group has been utilized CO under across critical condition
2the characteristic of temperature glide during heat release, makes across critical CO
2releases heat step by step; Simultaneously, under the effect of air cooler blower fan 100, cooling medium---air enters the air channel 10 in air cooler by the air intake interface 11 of air cooler, the heat exchange unit 2 successively decreasing through 4 heat exchange areas successively, every after a heat exchange unit 2, air themperature raises, and significantly reduce with the temperature difference of next heat exchange unit 2, effectively reduce the thermal resistance in heat transfer process, improve heat exchange efficiency, the leaving air temp of air is heated to 100 ℃.
Claims (6)
1. transcritical CO_2 heat pump air heating system air cooler, include rectangular housing (1), in rectangular housing (1), be air channel (10), the two ends of rectangular housing (1) have air intake interface (11) and the air-out interface (12) being communicated with air channel (10), interior flat raft interval, air channel (10) be provided with more than one heat exchange unit (2), each heat exchange unit (2) has inlet suction port and air outlet adapter, with flange (3), a plurality of heat exchange units (2) serial connection is become to heat exchange group, the inlet suction port of first heat exchange unit (2) is heat exchange group inlet end (21), the air outlet adapter of an end heat exchange unit (2) is heat exchange group outlet side (22), heat exchange group inlet end (21) and heat exchange group outlet side (22) pass outside rectangular housing (1), it is characterized in that: described heat exchange group at least has 4 heat exchange units (2), each heat exchange unit (2) is arranged according to heat exchange area size order, the heat exchange area of an end heat exchange unit of holding by air intake interface (11) is maximum, an end heat exchange unit is greater than 3 with the ratio of the heat exchange area of first heat exchange unit.
2. transcritical CO_2 heat pump air heating system air cooler according to claim 1, is characterized in that: the heat exchange area ratio of adjacent 2 heat exchange units (2) is more than or equal to 1.5.
3. transcritical CO_2 heat pump air heating system air cooler according to claim 1 and 2, is characterized in that: the version of described heat exchange unit (2) is finned tube exchanger structure.
4. across critical CO
2heat pump air heating system, it includes compressor (4), air cooler, regenerator (5), choke valve (6) and evaporimeter (7), in regenerator (5), be provided with high-pressure channel (51) and low-pressure channel (52), the outlet of compressor (4), air cooler, the high-pressure channel (51) of regenerator (5), choke valve (6), evaporimeter (7), the low-pressure channel (52) of regenerator (5) is communicated with into refrigerant circulation loop with the import of compressor (4) successively by pipeline, it is characterized in that: described air cooler be described in claim 1 or 2 or 3 across critical CO
2heat pump air heating system air cooler, the heat exchange group inlet end (21) of air cooler is connected with the outlet of compressor (4), and heat exchange group outlet side (22) connects high-pressure channel (51) one end of regenerator (5).
5. according to claim 4 described across critical CO
2heat pump air heating system, is characterized in that: near evaporimeter (7), be provided with evaporator fan (70).
6. according to claim 4 described across critical CO
2heat pump air heating system, is characterized in that: in the air intake interface (11) of air cooler, be provided with air cooler blower fan (100).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210238892.XA CN102778087B (en) | 2012-07-11 | 2012-07-11 | Transcritical CO2 heat pump air heating system and air cooling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210238892.XA CN102778087B (en) | 2012-07-11 | 2012-07-11 | Transcritical CO2 heat pump air heating system and air cooling device |
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| CN102778087A CN102778087A (en) | 2012-11-14 |
| CN102778087B true CN102778087B (en) | 2014-04-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968594B (en) * | 2014-05-28 | 2016-05-11 | 广东志高暖通设备股份有限公司 | A kind of Air-Cooled Heat Pump Unit |
| CN104729088A (en) * | 2015-03-26 | 2015-06-24 | 广东美的暖通设备有限公司 | Transcritical CO2 heat pump drying and water heater system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162123A (en) * | 2000-11-21 | 2002-06-07 | Sekisui Chem Co Ltd | Heat pump |
| CN1688858A (en) * | 2002-08-21 | 2005-10-26 | 昭和电工株式会社 | Heat exchanger, method for manufacturing heat exchanger, tube connecting structure for heat exchanger header tank, gas cooler using supercritical refrigerant, and refrigerant system |
| CN1902453A (en) * | 2004-01-12 | 2007-01-24 | 贝洱两合公司 | Heat exchanger, in particular for an over critical cooling circuit |
| CN1938554A (en) * | 2004-04-12 | 2007-03-28 | 昭和电工株式会社 | Heat exchanger |
| CN1333228C (en) * | 2005-01-26 | 2007-08-22 | 清华大学 | Microchannel slab internal heat exchanger of overcritical Co2 refrigerating circulation |
| JP2008157588A (en) * | 2006-12-26 | 2008-07-10 | Calsonic Kansei Corp | Air conditioner |
| CN201686635U (en) * | 2010-05-20 | 2010-12-29 | 铜陵化工集团有机化工有限责任公司 | Phthalic anhydride air-cooling device capable of preventing spontaneous combustion |
| CN202719813U (en) * | 2012-07-11 | 2013-02-06 | 广州万宝集团有限公司 | Transcritical CO2 heat pump air heating system and air cooler |
-
2012
- 2012-07-11 CN CN201210238892.XA patent/CN102778087B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162123A (en) * | 2000-11-21 | 2002-06-07 | Sekisui Chem Co Ltd | Heat pump |
| CN1688858A (en) * | 2002-08-21 | 2005-10-26 | 昭和电工株式会社 | Heat exchanger, method for manufacturing heat exchanger, tube connecting structure for heat exchanger header tank, gas cooler using supercritical refrigerant, and refrigerant system |
| CN1902453A (en) * | 2004-01-12 | 2007-01-24 | 贝洱两合公司 | Heat exchanger, in particular for an over critical cooling circuit |
| CN1938554A (en) * | 2004-04-12 | 2007-03-28 | 昭和电工株式会社 | Heat exchanger |
| CN1333228C (en) * | 2005-01-26 | 2007-08-22 | 清华大学 | Microchannel slab internal heat exchanger of overcritical Co2 refrigerating circulation |
| JP2008157588A (en) * | 2006-12-26 | 2008-07-10 | Calsonic Kansei Corp | Air conditioner |
| CN201686635U (en) * | 2010-05-20 | 2010-12-29 | 铜陵化工集团有机化工有限责任公司 | Phthalic anhydride air-cooling device capable of preventing spontaneous combustion |
| CN202719813U (en) * | 2012-07-11 | 2013-02-06 | 广州万宝集团有限公司 | Transcritical CO2 heat pump air heating system and air cooler |
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| CN102778087A (en) | 2012-11-14 |
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