CN102778087A - 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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- CN102778087A CN102778087A CN201210238892XA CN201210238892A CN102778087A CN 102778087 A CN102778087 A CN 102778087A CN 201210238892X A CN201210238892X A CN 201210238892XA CN 201210238892 A CN201210238892 A CN 201210238892A CN 102778087 A CN102778087 A CN 102778087A
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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 stride critical CO
2The heat pump field specifically is to stride 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, not flammable, and price is low, and ozone layer is not had the advantage destroyed, the enhancing of Along with people's environmental consciousness, CO
2Cold-producing medium more and more receives people's attention, especially at the CO that strides under the critical condition
2In exothermic process, have bigger temperature glide,, have the advantage that cuts down the consumption of energy in case when the heat absorption characteristics of this temperature glide and cooling medium are complementary, just can cooling medium be heated to very high temperature.
For with air as the critical CO of striding of cooling medium
2Heat pump; It mainly comprises compressor, air cooler, regenerator, choke valve and evaporimeter, is provided with high-pressure channel and low-pressure channel in the regenerator, and the low-pressure channel of the high-pressure channel of the outlet of compressor, air cooler, regenerator, choke valve, evaporimeter, regenerator and the import of compressor are communicated with through pipeline successively; 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, and has the heat exchanger tube perforation of arrangement in a row on the heat exchange fin, and the heat exchanger tube perforation that heat exchanger tube passes heat exchange fin in a row interts on 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 is formed integrated import on the pipeline; The outside mouth of pipe of one row's heat exchanger tube of end layer is concentrated to be connected in and is formed integrated outlet on the pipeline, and integrated import is connected with the outlet of compressor, and integrated outlet is connected with the import of regenerator high-pressure channel; After the heat pump operation, the CO of low-temp low-pressure
2Gas is compressed to supercriticality in compressor, air cooler and the release place heat of flowing through the then air themperature that air cooler is peripheral raises.Existing this heat pump receives the restriction of air cooler exchange capability of heat and air heat absorption characteristics; There is the defective that heat exchange efficiency is low, intensification is limited in one's ability; Generally can the temperature of cooling medium air be risen to 60 ℃, but be difficult to further raise again, limit with air as the critical CO of striding of cooling medium
2Therefore the application of heat pump, is necessary to improve.
Summary of the invention
The present invention is according to striding critical CO
2Heat transfer characteristic; A kind of heat pump air heating system of striding critical CO2 heat pump air heating system with air cooler and this air cooler of employing is proposed; Air cooler has efficiency of heating surface height, characteristics that the intensification ability is strong; The heat pump air heating system can provide high temperature air, has that energy consumption is low, the advantage of applied range.
The object of the invention is realized through following technical scheme:
Stride critical CO2 heat pump air heating system and use air cooler; Including rectangular housing, is the air channel in the rectangular housing, and the two ends of rectangular housing have air intake interface and the air-out interface that is communicated with the air channel; In the air channel flat raft at interval be 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 is become the heat exchange group, and each heat exchange unit is arranged according to the heat exchange area size order; Lean on the heat exchange area of an end heat exchange unit of air intake interface end maximum, the ratio of an end heat exchange unit and the heat exchange area of first heat exchange unit is greater than 3; First heat exchange unit is arranged at and leans on the air-out interface end in the air channel; Its inlet suction port is a heat exchange group inlet end; An end heat exchange unit is arranged in the air channel near the air intake interface end; Its air outlet adapter is heat exchange group outlet side, and heat exchange group inlet end and heat exchange group outlet side pass outside the rectangular housing, and the version of said heat exchange unit is the 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 has the critical CO of striding of above-mentioned air cooler
2The heat pump air heating system; It includes compressor, air cooler, regenerator, choke valve and evaporimeter; Be provided with high-pressure channel and low-pressure channel in the regenerator, 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 through pipeline successively; Said air cooler is above-mentionedly to stride critical CO2 heat pump air heating system and use 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 also is provided with evaporator fan near the evaporimeter; Also be provided with the air cooler blower fan in the air intake interface of air cooler.
Heat pump air heating system of the present invention is striden critical CO after starting
2In system, circulate, when flowing through air cooler of the present invention, stride critical CO by pipeline connection
2Inlet suction port end by air cooler gets into the heat exchange group in the housing, and the heat exchange unit that increases progressively through a plurality of heat exchange areas is successively striden critical CO
2Discharge heat step by step; Simultaneously, under the effect of air cooler blower fan, cooling medium (air) is got in the air cooler by the air intake interface of air cooler; The heat exchange unit that successively decreases through a plurality of heat exchange areas successively; Every through behind the heat exchange unit, air themperature raises, and gradually reduces with the temperature difference of next heat exchange unit; Thermal resistance in the heat transfer process is reduced, effectively improve heat exchange efficiency.Like this, both made full use of to be in and striden CO under the critical condition
2The characteristic of temperature glide during heat release, the thermal resistance problem that the temperature difference causes greatly when having avoided heat exchange again with air heat, ranges up to 100 ℃ with low energy consumption.
The present invention has following outstanding substantive distinguishing features and obvious improvement:
1, air cooler of the present invention is according to striding CO under the critical condition
2Exist the characteristic of temperature glide to carry out grading design at exothermic process, through 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 stride critical CO
2Heat exchanger effectiveness high, realized the purpose of low energy consumption, high leaving air temp.
Description of drawings
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 present invention is described further:
With reference to figure 1 and Fig. 2, stride critical CO2 heat pump air heating system and use air cooler, include rectangular housing 1; In the rectangular housing 1 is air channel 10; The two ends of rectangular housing 1 have the air intake interface that is communicated with air channel 10 11 and air-out interface 12, in the air channel 10 flat rafts at interval be provided with 4 heat exchange units 2, the version of heat exchange unit 2 is the finned tube exchanger structure; It has inlet suction port and air outlet adapter; With flange 3 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 the heat exchange group, an end heat exchange unit 2 is arranged in the air channel 10 near air inlet 11 ends, and its air outlet adapter is heat exchange group outlet side 22; First heat exchange unit 2 is arranged at and leans on air-out interface 12 ends in the air channel 10; Its inlet suction port is a heat exchange group inlet end 21, and heat exchange group inlet end 21 passes outside the rectangular housing 1 with heat exchange group outlet side 22, and 4 heat exchange units 2 are according to heat exchange area order arrangement from small to large; An end heat exchange unit is 1:1.5:2.5:5 with the heat exchange area ratio of 5,4 heat exchange units 2 of ratio equality of the heat exchange area of first heat exchange unit.
Specifically, use the critical CO of striding of above-mentioned air cooler with reference to figure 2
2The heat pump air heating system; It includes compressor 4, air cooler, regenerator 5, choke valve 6 and evaporimeter 7; Be provided with high-pressure channel 51 and low-pressure channel 52 in the regenerator 5, 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 through pipeline successively; Said air cooler is above-mentionedly to stride critical CO2 heat pump air heating system and use 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 1 ends of regenerator 5; Be provided with evaporator fan 70 near the evaporimeter 7, be provided with air cooler blower fan 100 in the air intake interface 11 of air cooler.
The heat pump air heating system of present embodiment is striden critical CO after starting
2In system, circulate, during the air cooler of the present embodiment of flowing through, stride critical CO by pipeline connection
2By the heat exchange group in the inlet suction port end 21 entering rectangular housing 1 of air cooler, the heat exchange unit 2 that increases progressively through 4 heat exchange areas successively, the heat exchange group has been utilized to be in and has been striden CO under the critical condition
2The characteristic of temperature glide during heat release makes and strides critical CO
2Discharge heat step by step; Simultaneously, under the effect of air cooler blower fan 100, cooling medium---air is by the air channel 10 in the air intake interface 11 entering air coolers of air cooler; The heat exchange unit 2 that successively decreases through 4 heat exchange areas successively, every through behind the 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 the heat transfer process, improve heat exchange efficiency, the leaving air temp of air is heated to 100 ℃.
Claims (6)
1. stride critical CO2 heat pump air heating system and use air cooler; Include rectangular housing (1); In the rectangular housing (1) is air channel (10); The two ends of rectangular housing (1) have air intake interface (11) and the air-out interface (12) that is communicated with air channel (10), air channel (10) interior flat raft being provided with at interval more than a heat exchange unit (2), and 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 the heat exchange group; The inlet suction port of first heat exchange unit (2) is a heat exchange group inlet end (21), and the air outlet adapter of an end heat exchange unit (2) is heat exchange group outlet side (22), and heat exchange group inlet end (21) and heat exchange group outlet side (22) pass outside the rectangular housing (1); It is characterized in that: said heat exchange group has 4 heat exchange units (2) at least; Each heat exchange unit (2) is arranged according to the heat exchange area size order, leans on the heat exchange area of an end heat exchange unit of air intake interface (11) end maximum, and the ratio of an end heat exchange unit and the heat exchange area of first heat exchange unit is greater than 3.
2. according to claim 1ly stride critical CO2 heat pump air heating system and use air cooler, it is characterized in that: the heat exchange area of adjacent 2 heat exchange units (2) is than more than or equal to 1.5.
3. according to claim 1 and 2ly stride critical CO2 heat pump air heating system and use air cooler, it is characterized in that: the version of said heat exchange unit (2) is the finned tube exchanger structure.
4. stride critical CO
2The heat pump air heating system; It includes compressor (4), air cooler, regenerator (5), choke valve (6) and evaporimeter (7); Be provided with high-pressure channel (51) and low-pressure channel (52) in the regenerator (5); 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) through pipeline successively, it is characterized in that: said air cooler is that claim 1 or 2 or 3 is describedly striden critical CO
2The heat pump air heating system is used air cooler, and 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 ends of regenerator (5).
5. the said critical CO that strides according to claim 4
2The heat pump air heating system is characterized in that: be provided with evaporator fan (70) near the evaporimeter (7).
6. the said critical CO that strides according to claim 4
2The heat pump air heating system is characterized in that: be provided with air cooler blower fan (100) in the air intake interface (11) of air cooler.
Priority Applications (1)
| 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 true CN102778087A (en) | 2012-11-14 |
| CN102778087B CN102778087B (en) | 2014-04-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968594A (en) * | 2014-05-28 | 2014-08-06 | 广东志高暖通设备股份有限公司 | Air cooling 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 |
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| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968594A (en) * | 2014-05-28 | 2014-08-06 | 广东志高暖通设备股份有限公司 | Air cooling 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102778087B (en) | 2014-04-09 |
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