CN206488501U - A kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump - Google Patents
A kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump Download PDFInfo
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- CN206488501U CN206488501U CN201621421316.9U CN201621421316U CN206488501U CN 206488501 U CN206488501 U CN 206488501U CN 201621421316 U CN201621421316 U CN 201621421316U CN 206488501 U CN206488501 U CN 206488501U
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Abstract
The utility model provides a kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump, it includes CO2Heat pump and the second heat pump, wherein, CO2Heat pump is low-temperature level, and it includes the CO being sequentially connected2Compressor, gas cooler, evaporative condenser, first throttle device, flash vessel, second throttling device, evaporator and fluid gas separating device；Second heat pump is high-temperature level, and it includes the second compressor, the second condenser, the 3rd throttling arrangement and the evaporative condenser being sequentially connected；CO2Heat pump is combined with the second heat pump by devaporizer overlapping, CO2Heat pump is absorbed heat by evaporative condenser heat release, the second heat pump by the evaporative condenser；Flash vessel also with CO2Compressor is connected to carry out CO to it2Gas is supplemented.Heat pump of the present utility model can realize heating in 35 DEG C of cold district, maintain higher COP and relatively low manufacturing cost.
Description
Technical field
The utility model belongs to heat energy conversion and utilizes technical field, and in particular to a kind of tonifying Qi suitable for cold district
Increasing enthalpy CO2Part overlapping heat pump.
Background technology
In recent years, with the implementation of " coal changes electricity ", air source heat pump progresses into the life of people, but current air-source
Heat pump is difficult to meet the ultra-low temperature surroundings operation below -25 DEG C.Air source heat pump of the prior art in use when
When environment temperature is relatively low (such as the northeast, the Inner Mongol, Xinjiang in cold district), it is impossible to fully draw the heat in environment
For heating or hot water preparing, so as to cause that the Energy Efficiency Ratio of whole heat pump is relatively low, energy consumption is larger, and frosting also easily occurs
Etc. unfavorable phenomenon, the service behaviour of whole system is caused to be deteriorated, it is impossible to meet user's heating, the demand of hot water preparing.Existing skill
Trans-critical cycle CO in art2, technology is in heating field, because return water temperature is generally greater than 31 DEG C, it is impossible to utilize CO2Critical point compared with
The heat that high specific heat capacity is produced, therefore Energy Efficiency Ratio is not high；Freon system heating capacity sharp-decay at low ambient temperatures, and
The working range of single freon refrigerant is smaller, and freon cascade system needs multistage overlapping to meet cold district heating
It is required that, cost is higher, and COP values are relatively low, therefore is badly in need of developing a kind of new heat pump, to improve above-mentioned unfavorable feelings
Condition.Performance degradation is serious at a temperature of there is low temperature environment due to heat pump heating/water system of the prior art, produces out
Hot water temperature is not high, the technical problem such as the COP of cold district routine overlapping heat pump is relatively low or cost is higher, therefore the utility model
Research and design goes out a kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump.
Utility model content
Therefore, the technical problems to be solved in the utility model is to overcome heat pump heating system of the prior art to exist
Performance degradation is serious at a temperature of low temperature environment, hot water preparing temperature is not high, conventional overlapping heat pump COP is relatively low and cost is higher
Defect, so as to provide a kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump.
The utility model provides a kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump, it includes CO2Heat
Pumping system and the second heat pump, wherein, the CO2Heat pump is low-temperature level, and it includes the CO being sequentially connected2Compressor, gas
Body cooler, devaporizer, first throttle device, flash vessel, second throttling device, evaporator and fluid gas separating device；Institute
The second heat pump is stated for high-temperature level, it includes the second compressor, the second condenser, the 3rd throttling arrangement and the steaming being sequentially connected
Send out cooler；The CO2Heat pump is combined with second heat pump by devaporizer overlapping, the CO2
Heat pump is absorbed heat by the devaporizer heat release, second heat pump by the devaporizer；And institute
State flash vessel also with the CO2Compressor is connected to carry out supplementing the CO of medium temperature and medium pressure to it2.Preferably, the flash vessel is institute
State CO2The CO of compressor supplement2The temperature of gas is 35-50 DEG C, and pressure is 4-6MPa.Preferably, the CO2Heat pump is also
Including regenerator, its respectively with the CO2Compressor, devaporizer, first throttle device and the connection of fluid gas separating device.It is excellent
Selection of land, the gas cooler is arranged on the upward refrigerant end of the devaporizer.Preferably, second heat pump
Middle use R245fa, R134a are used as refrigerant.Preferably, first throttle device, second throttling device and the 3rd throttling arrangement are
Choke valve or injector.
A kind of Gas-supplying enthalpy-increasing CO suitable for cold district that the utility model is provided2Part overlapping heat pump has and had as follows
Beneficial effect：
1. CO described in the utility model patent2System circulation is defined dual-stage servo system, first applies Gas-supplying enthalpy-increasing technology
CO2 Trans-critical cycle heat pumps, under ultralow-temperature operation conditions, add the mass flow in gas cooler, break through tradition CO2Across
The drawback such as critical heat pump cold operation Energy Efficiency Ratio is low, pressure at expulsion is high, can be supplied at a temperature of -35 DEG C of ultra-low temperature surroundings
Warm up and domestic hot-water is provided, keep higher COP, further, since system employs Gas-supplying enthalpy-increasing technology, reduce by a compressor
Use, therefore its more conventional CO2Dual-stage servo system greatly reduces cost.
2. the Gas-supplying enthalpy-increasing CO suitable for cold district that the utility model is provided2Part overlapping heat pump uses two-part gas
Body cooler, the refrigerant circulation of the second heat pump make use of CO2The low-grade energy of critical end, both improves CO2Trans-critical cycle
Heat pump (CO2Air cooler outlet temperature is dropped to below critical point) COP again from suitable refrigerant (according to refrigerant thing
Property) low-grade energy is converted into high-grade energy, realize high-temperature water outlet under ultralow-temperature operation conditions, high-temperature tempering；
3. the Gas-supplying enthalpy-increasing CO suitable for cold district that the utility model is provided2Part overlapping heat pump uses flash vessel mould
Formula carries out Gas-supplying enthalpy-increasing so that the amount of parts in high pressure falls below minimum, reduces cost；
4. the Gas-supplying enthalpy-increasing CO suitable for cold district that the utility model is provided2Part overlapping heat pump, can be at -35 DEG C
Run under cold conditions, thermobiosis hot water can also be provided while realizing heating；
5. the Gas-supplying enthalpy-increasing CO suitable for cold district that the utility model is provided2Part overlapping heat pump, passes through condenser
With air cooler successively progressively heat hot water, the cascade utilization energy, remain that refrigerant and water have the less temperature difference, reduce
(fire is used) loss.
Brief description of the drawings
Fig. 1 is a kind of Gas-supplying enthalpy-increasing CO suitable for cold district of the present utility model2The structure of part overlapping heat pump is shown
It is intended to.
Reference is expressed as in figure：
1-CO2 compressor, 2- gas coolers, 3- devaporizers, 4- regenerators, 5-first throttle device, 6-dodge
Steaming device, 7-second throttling device, 8-evaporator, 9-fluid gas separating device, the compressors of 10- second, the condensers of 11- second,
The throttling arrangements of 12- the 3rd, 13- shell-and-tube heat exchangers.
Embodiment
The utility model provides a kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump, it can be
Cold district is run, and is realized heating demands and is provided domestic hot-water.
Fig. 1 shows the Gas-supplying enthalpy-increasing CO described in the utility model suitable for cold district2The structure of part overlapping heat pump
Schematic diagram.As shown in figure 1, it includes CO2Heat pump and the second heat pump, wherein, the CO2Heat pump is low-temperature level,
It includes the CO being sequentially connected2Compressor 1, gas cooler 2, devaporizer 3, first throttle device 5, flash vessel 6, second
Throttling arrangement 7, evaporator 8 and fluid gas separating device 9；Second heat pump is high-temperature level, it include being sequentially connected the
Two compressors 10, the second condenser 11, the 3rd throttling arrangement 12 and devaporizer 3；The CO2Heat pump and described second
Heat pump is combined by the overlapping of devaporizer 3；Wherein described second heat pump passes through the devaporizer 3
Evaporation endothermic, the CO2Heat pump cools down heat release (i.e. CO by the devaporizer 32Heat pump is followed with the second heat pump
Loop system shares the devaporizer 3).The import connection heating system import of second condenser 11, outlet connection CO2Air cooling
Device 2, CO2The outlet connecting pipe shell heat exchanger 13 of air cooler 2, the outlet of shell-and-tube heat exchanger 13 connection heating system, is that user carries
For heating demands.There is coil pipe import to connect running water inlet in shell-and-tube heat exchanger 13, connection user in outlet provides the user life
Hot water living.In the CO2In heat pump, the CO2The connection of compressor 1 and fluid gas separating device 9 is specially：CO2Compressor
The gas outlet of 1 import connection fluid gas separating device 9, the oily separating opening in bottom of oil return opening connection fluid gas separating device 9.In addition, institute
State flash vessel 6 also with the CO2Compressor 1 is connected to carry out CO to it2The supplement of gas, realizes the function of Gas-supplying enthalpy-increasing.This reality
With the new Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump uses the CO of superposition type2Heat pump and the second heat
Pumping system, and in CO2Using gas cooler and the connected mode of devaporizer two-stage type heat release in heat pump, realize
High-temperature water outlet, high-temperature tempering, overcome existing CO2Defect relatively low COP when heat pump return water temperature is high.Adopt at system hypothermia end
Use CO2Refrigerant, the defect that heat pump of the prior art performance degradation at a temperature of low temperature environment can be overcome serious so that
Stable system performance and system energy efficiency maintains higher level, CO all the time2There is superior thermophysical property in worst cold case：
CO2Evaporation latent heat it is larger, refrigerating effect per unit swept volume height (at -40 DEG C, refrigerating effect per unit swept volume is 9.43 times of NH3)；CO2's
Kinematic viscosity is low (kinematic viscosity of saturated liquid only has the 67% of NH3 at -40 DEG C)；CO2Thermal conductivity factor it is high, fluid density and
The ratio of vapour density is small, and the distribution of refrigerant is more uniform between each loop after throttling, therefore system is suitable for less than -30 DEG C
Ultra-low temperature surroundings temperature.Most critical, creatively Gas-supplying enthalpy-increasing technology is applied in CO2Trans-critical cycle heat pump, ultralow
Under warm operating mode, the mass flow in gas cooler is added, tradition CO is broken through2Trans-critical cycle heat pump cold operation drawback,
COP is greatly improved, and the heat pump can solve the problem that the heating problem of extremely cold area and provide thermobiosis hot water.In addition,
It is CO that flash vessel is used in the utility model2Heat pump Gas-supplying enthalpy-increasing, only with a CO2Compression function meets system operation need
Ask so that the part in high pressure is dropped at least, reduces cost.Preferably, the flash vessel 6 is the CO2Compressor 1 is mended
The CO filled2The temperature of gas is 35-50 DEG C, and pressure is 4-6MPa.The CO2Heat pump is trans critical cycle, the flash vessel
6 intermediate fill gas mouths connect CO2The gas supplementing opening of compressor 1, is the CO that it supplements above-mentioned intermediate pressure medium temperature2Gas.The gas enters
Enter CO2The gas supplementing opening recompression of compressor 1, so as to reduce CO2The power consumption of compressor 1, has reached the effect of Gas-supplying enthalpy-increasing, has carried
High system COP.The Gas-supplying enthalpy-increasing opens flash vessel below 0 DEG C and carries out Gas-supplying enthalpy-increasing.Preferably, the CO2Heat pump
System also include regenerator 4, its respectively with the CO2Compressor 1, devaporizer 3, first throttle device 5 and fluid qi leel
Connected from device 9.Specifically, as shown in figure 1, the side-entrance connection devaporizer 3 of the regenerator 4, outlet connection first
Throttling arrangement 5, another side-entrance connection fluid gas separating device 9, outlet connection CO2The air entry of compressor 1.By setting this time
Hot device, can reduce the power consumption of compressor, further improve the COP of system.Preferably, the gas cooler 2 is arranged on institute
State the upward refrigerant end of devaporizer 3.So gas cooler is caused to be configured to first order cooler, devaporizer structure
As second-stage cooler, the cooling exotherm of two-stage tandem formula is formed, CO can be effectively utilized2The high exhaust of heat pump
Temperature is so as to produce high-temperature-hot-water, while reducing the power of devaporizer and the energy consumption of the second heat pump；It can pass through
First order cooler (gas cooler) release heat of high temperature is reheated to the second condensator outlet hot water, is realized and is progressively added
Hot water, less (fire is used) loss, and devaporizer (second-stage cooler) and the second heat pump circulating system can be passed through
Exchanged heat, specifically, because the evaporating temperature of the second heat pump is sufficiently low, so as to effectively reduce CO2Heat pump system
The temperature of cryogen, and then lower temperature can be reached after throttling expansion.Preferably, used in second heat pump
R245fa, R134a are used as refrigerant.The CO of the utility model patent2Heat pump uses CO2As refrigerant, it can utilize
CO2Refrigerant mobile performance excellent under worst cold case and heat exchange property, produce high-temperature-hot-water.And the circulation of the second heat pump
It make use of CO2The low-grade energy of critical end, both improves CO2The COP of Trans-critical cycle heat pump selects above-mentioned suitable refrigeration again
Low-grade energy is converted into high-grade energy (fluorine system circulation COP is higher) by agent (according to physical properties), improves heating
Return water temperature.For example, in -35 DEG C of environment temperature, -40 DEG C of the evaporating temperature of the evaporator 8；System is used as using R245fa
During cryogen, 65 DEG C of water inlets of the second condenser of overlapping high-temperature level, 70 DEG C of water outlets (75 DEG C of condensation temperature), now, CO2Gas cooling
Device 2 can reach 70 DEG C of water inlets, and 80 DEG C of water outlets can reach that heating is required and can reach domestic water requirement.Certainly, this area skill
Art personnel are it should be appreciated that other existing high temperature refrigerants are also applied for the utility model second except above-mentioned refrigerant
Heat pump.Preferably, first throttle device (5), second throttling device (7) and the 3rd throttling arrangement (12) be choke valve or
Injector.Certainly, it will be apparent to a skilled person that other throttling arrangements are also applied for the utility model.
The CO that the utility model patent is provided2Heat pump can be run under the cold conditions of -35 DEG C of environment temperature, described to steam
Send out CO in device 82Reachable -40 DEG C of evaporating temperature；When realizing that heating is required, COP is more than 2.5.The utility model patent utilization
CO2Heat pump Trans-critical cycle technology, makes CO2The outlet temperature of thermo-compression evaporation cooler 3 is less than 29 DEG C, takes full advantage of CO2Heat pump Trans-critical cycle
Energy, and select such as R245fa, R134a middle and high temperature refrigerant as devaporizer 3 evaporation working medium so that system
COP is higher than common overlapping unit, and the low-grade energy at carbon dioxide low temperature can be promoted into high-grade energy, so that
Realize the heating demands of extremely cold area and domestic hot-water is provided, meet the heating demands and domestic water need of cold district user
Ask, and initial cost, operating cost fallen below minimum, overcome the shortcomings of that existing heat pump is present.
Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.Preferred embodiment of the present utility model is the foregoing is only, it is all not to limit the utility model
Any modifications, equivalent substitutions and improvements made within spirit of the present utility model and principle etc., should be included in this practicality
Within new protection domain.Described above is only preferred embodiment of the present utility model, it is noted that led for this technology
For the those of ordinary skill in domain, on the premise of the utility model technical principle is not departed from, can also make it is some improvement and
Modification, these improvement and modification also should be regarded as protection domain of the present utility model.
Claims (6)
1. a kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump, it is characterised in that：Including CO2Heat pump and
Second heat pump, wherein,
The CO2Heat pump is low-temperature level, and it includes the CO being sequentially connected2Compressor (1), gas cooler (2), evaporation are cold
But device (3), first throttle device (5), flash vessel (6), second throttling device (7), evaporator (8) and fluid gas separating device (9)；
Second heat pump is high-temperature level, its second compressor (10) for including being sequentially connected, the second condenser (11), the
Three throttling arrangements (12) and devaporizer (3)；
The CO2Heat pump is combined with second heat pump by devaporizer (3) overlapping, the CO2Heat
Pumping system is absorbed heat by the devaporizer (3) heat release, second heat pump by the devaporizer (3)；And
And
The flash vessel (6) also with the CO2Compressor (1) is connected to carry out CO to it2The supplement of gas.
2. the Gas-supplying enthalpy-increasing CO according to claim 1 suitable for cold district2Part overlapping heat pump, it is characterised in that：Institute
Flash vessel (6) is stated for the CO2The CO of compressor (1) supplement2The temperature of gas is 35-50 DEG C, and pressure is 4-6MPa.
3. the Gas-supplying enthalpy-increasing CO according to claim 1 or 2 suitable for cold district2Part overlapping heat pump, its feature exists
In：The CO2Heat pump also include regenerator (4), its respectively with the CO2Compressor (1), devaporizer (3), first
Throttling arrangement (5) and fluid gas separating device (9).
4. the Gas-supplying enthalpy-increasing CO according to claim 1 or 2 suitable for cold district2Part overlapping heat pump, its feature exists
In：Gas cooler (2) is arranged on the upward refrigerant end of the devaporizer (3).
5. the Gas-supplying enthalpy-increasing CO according to claim 1 or 2 suitable for cold district2Part overlapping heat pump, its feature exists
In：Refrigerant is used as using R245fa, R134a in second heat pump.
6. the Gas-supplying enthalpy-increasing CO according to claim 1 or 2 suitable for cold district2Part overlapping heat pump, its feature exists
In：First throttle device (5), second throttling device (7) and the 3rd throttling arrangement (12) are choke valve or injector.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621421316.9U CN206488501U (en) | 2016-12-23 | 2016-12-23 | A kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621421316.9U CN206488501U (en) | 2016-12-23 | 2016-12-23 | A kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump |
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| CN206488501U true CN206488501U (en) | 2017-09-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766316A (en) * | 2016-12-23 | 2017-05-31 | 燕园德普科技（北京）有限公司 | A kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump |
| CN109751795A (en) * | 2018-12-20 | 2019-05-14 | 珠海格力电器股份有限公司 | Heat pump system and its control method |
-
2016
- 2016-12-23 CN CN201621421316.9U patent/CN206488501U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766316A (en) * | 2016-12-23 | 2017-05-31 | 燕园德普科技（北京）有限公司 | A kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump |
| CN109751795A (en) * | 2018-12-20 | 2019-05-14 | 珠海格力电器股份有限公司 | Heat pump system and its control method |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220113 Address after: 215100 room 0204, floor 2, building B, vitality Business Plaza, No. 185 jumao street, Yuanhe street, Xiangcheng District, Suzhou City, Jiangsu Province Patentee after: Suzhou carbon Lisheng Technology Co.,Ltd. Address before: 1301-a1519-11, floor 15, building 1, No. 3, Haidian Street, Haidian District, Beijing 100080 Patentee before: YANYUAN DEPU TECHNOLOGY (BEIJING) CO.,LTD. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230510 Address after: B403, Floor 4, Building 3, Yard 13, Cuihunan Ring Road, Haidian District, Beijing 100080 Patentee after: YANYUAN DEPU TECHNOLOGY (BEIJING) CO.,LTD. Address before: 215100 room 0204, floor 2, building B, vitality Business Plaza, No. 185 jumao street, Yuanhe street, Xiangcheng District, Suzhou City, Jiangsu Province Patentee before: Suzhou carbon Lisheng Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |