CN201819296U - Two-stage compression heat pump type heat exchanger unit - Google Patents
Two-stage compression heat pump type heat exchanger unit Download PDFInfo
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- CN201819296U CN201819296U CN 201020551499 CN201020551499U CN201819296U CN 201819296 U CN201819296 U CN 201819296U CN 201020551499 CN201020551499 CN 201020551499 CN 201020551499 U CN201020551499 U CN 201020551499U CN 201819296 U CN201819296 U CN 201819296U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
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Abstract
The utility model discloses a two-stage compression heat pump type heat exchanger unit belonging to the field of energy technology. The heat exchanger unit comprises a water-water heat exchanger, a two-stage compression heat pump, a connecting pipeline and an attachment, wherein a waterway system of the connecting pipeline is divided into a primary network pipeline and a secondary network pipeline, and the water-water heat exchanger, a first evaporator of a first-stage compression heat pump and a second evaporator of a second-stage compression heat pump are connected in series through the primary network pipeline; and the secondary network pipeline is divided into two parts, wherein a second condenser and a first condenser are serially connected in sequence through one pipeline, and then the pipeline is mingled with the other pipeline connected with the water-water heat exchanger. By adopting the two-stage compression heat pump type heat exchanger unit, solar energy and industrial low temperature waste heat can be efficiently utilized, and the transmission and distribution capability of a heating system can be improved, the water-water heat exchanger unit in a heat energy station can be replaced, and the transmission and distribution capability of heat load of a hot net of a heat supply system can be improved; moreover, the utility model has the advantages of compact structure and small volume, and is simple to operate and easy to maintain.
Description
Technical field
The utility model belongs to energy technology field, particularly a kind of twin-stage compression heat pump type heat exchange unit.
Background technology
Along with the Rapid Expansion of economic development and city size, the city plot ratio improves greatly, and the demand rapid growth of the heating demand in the heat supply zone that original heating network is responsible for carries out heat supply according to original pipe network supply backwater temperature difference, is difficult to satisfy the demands.Under the prerequisite that satisfies the requirement of secondary net heating parameter, how increasing once net hot water supply backwater temperature difference is that a urgent need solves important topic to improve once net thermic load transmission ﹠ distribution ability.Existing thermal substation space is smaller, and development structure compactness, the heat exchange unit that volume is little are once the keys that net great temperature difference heat supply technology is promoted.
The utility model content
The purpose of this utility model provides a kind of twin-stage compression heat pump type heat exchange unit.
A kind of twin-stage compression heat pump type heat exchange unit, this device is made up of water water-to-water heat exchanger, first order compression heat pump, second level compression heat pump, connecting line and annex;
First order compression heat pump comprises first compressor, first condenser, first evaporimeter, first regenerator, first expansion valve; First evaporimeter, first regenerator, first compressor, first condenser are connected in series successively, and described first condenser links to each other with described first evaporimeter through first expansion valve with after described first regenerator is connected again; First order heat pump fluid forms independently closed circuit;
Second level compression heat pump comprises second compressor, second condenser, second evaporimeter, second regenerator, second expansion valve; Second evaporimeter, second regenerator, second compressor, second condenser are connected in series successively, and described second condenser links to each other with described second evaporimeter through second expansion valve with after described second regenerator is connected again; Second level heat pump fluid forms independently closed circuit;
The water circuit system of connecting line is divided into webmaster road and secondary webmaster road two parts in the described device; No. one time the webmaster road is connected in series first evaporimeter of water water-to-water heat exchanger and first order compression heat pump and second evaporimeter of second level compression heat pump successively; Two-way is divided on secondary webmaster road, after wherein one road pipeline is connected in series second condenser and first condenser successively, converges with another road pipeline that is connected the water water-to-water heat exchanger again.
Can in described device, increase subcooler, economizer.Specific as follows:
One, in (1) described device, can increase by first subcooler in first order compression heat pump, described first subcooler is connected between described first condenser and described first regenerator; Wherein one road pipeline on secondary webmaster road with described second condenser be connected in series with described first condenser again after described first subcooler is in parallel.
(2) in the device of above-mentioned (1), can in the compression heat pump of the described second level, increase by second economizer and second control valve; Described second economizer is connected between described second condenser and described second regenerator; The described second condensator outlet pipeline divides two-way, and one the tunnel after described second control valve connects the shell side of described second economizer, and the pipeline that is connected described second compressor with described second regenerator converges; Another road connects the tube side of described second economizer, is connected with described second regenerator again.
(3) in the device of above-mentioned (1), can in the compression heat pump of the described second level, increase by second subcooler, second economizer and second control valve, described second condenser is connected with described second regenerator with after described second subcooler and described second economizer are connected successively again; The described second subcooler export pipeline divides two-way, and one the tunnel after described second control valve connects the shell side of described second economizer, and the pipeline that is connected described second compressor with described second regenerator converges; Another road connects the tube side of described second economizer, described second regenerator of connecting again; Wherein one road pipeline on secondary webmaster road with described second subcooler with after described second condenser is connected, in parallel with described first subcooler, be connected in series with described first condenser again.
Two, in the described device, can increase by first economizer and first control valve in described first order compression heat pump, described first economizer is connected between described first condenser and described first regenerator; The described first condensator outlet pipeline divides two-way, and one the tunnel after described first control valve connects the shell side of described first economizer, and the pipeline that is connected described first compressor with described first regenerator converges; Another road connects the tube side of described first economizer, is connected with described first regenerator again;
Can in the compression heat pump of the described second level, increase by second economizer and second control valve; Described second economizer is connected between described second condenser and described second regenerator; The described second condensator outlet pipeline divides two-way, and one the tunnel after described second control valve connects the shell side of described second economizer, and the pipeline that is connected described second compressor with described second regenerator converges; Another road connects the tube side of described second economizer, is connected with described second regenerator again.
In the above-mentioned twin-stage compression heat pump type heat exchange unit, heat pump fluid can adopt any one among R22, R134a or the R410A.
The beneficial effects of the utility model are:
The utility model relates to a kind of heat exchange unit that is used for heating, heat supply water, the heating system that also can be used for solar energy or industrial low-temperature waste heat, particularly a kind of return water temperature that can reduce heating system also can significantly increase the twin-stage compression heat pump type heat exchange unit of heating network supply backwater temperature difference simultaneously so that efficient, economic recovery solar energy or industrial low-temperature waste heat.This twin-stage compression heat pump type heat exchange unit not only can efficiently utilize solar energy and industrial low-temperature waste heat and improve the transmission ﹠ distribution ability of heating system, but also has advantages such as compact conformation, volume are little, simple to operate, easy care.In addition, the water water heat exchange unit of alternative thermal substation also improves the transmission ﹠ distribution ability of the heat supply network thermic load of central heating system.
Description of drawings
Fig. 1 is the twin-stage compression heat pump type heat exchange unit schematic diagram of embodiment 1;
Fig. 2 is the twin-stage compression heat pump type heat exchange unit schematic diagram of embodiment 2;
Fig. 3 is the twin-stage compression heat pump type heat exchange unit schematic diagram of embodiment 3;
Fig. 4 is the twin-stage compression heat pump type heat exchange unit schematic diagram of embodiment 4;
Number in the figure:
1-first compressor; 2-first condenser; 3-first evaporimeter; 4-first regenerator; 5-first subcooler; 6-first expansion valve; 7-second compressor; 8-second condenser; 9-second evaporimeter; 10-second regenerator; 11-first economizer; 12-second expansion valve; 13-second control valve; 14-second subcooler; The 15-control valve; 16-water water-to-water heat exchanger; 17-second economizer; 18-first control valve; 19-first compression heat pump; 20-second compression heat pump.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
A kind of twin-stage compression heat pump type heat exchange unit, as shown in Figure 1, this device is made up of water water-to-water heat exchanger 16, first order compression heat pump 19, second level compression heat pump 20, connecting line and annex;
First order compression heat pump 19 comprises first compressor 1, first condenser 2, first evaporimeter 3, first regenerator 4, first expansion valve 6; First evaporimeter 3, first regenerator 4, first compressor 1, first condenser 2 are connected in series successively, and described first condenser 2 links to each other with described first evaporimeter 3 through first expansion valve 6 with after described first regenerator 4 is connected again; First order heat pump fluid forms independently closed circuit;
Second level compression heat pump 20 comprises second compressor 7, second condenser 8, second evaporimeter 9, second regenerator 10, second expansion valve 12; Second evaporimeter 9, second regenerator 10, second compressor 7, second condenser 8 are connected in series successively, and described second condenser 8 links to each other with described second evaporimeter 9 through second expansion valve 12 with after described second regenerator 10 is connected again; Second level heat pump fluid forms independently closed circuit;
The water circuit system of connecting line is divided into webmaster road and secondary webmaster road two parts in the described device; No. one time the webmaster road is connected in series water water-to-water heat exchanger 16 and first evaporimeter 3 of first order compression heat pump 19 and second evaporimeter 9 of second level compression heat pump 21 successively; Two-way is divided on secondary webmaster road, after wherein one road pipeline is connected in series second condenser 8 and first condenser 2 successively, converges with another road pipeline that is connected water water-to-water heat exchanger 16 again.
Specifically, once net hot water heats secondary net hot water in water water-to-water heat exchanger 16, after the heat release cooling, enter first evaporimeter 3 of first compression heat pump 19, cooled, the evaporation of heat pump fluid heat absorption simultaneously by heat pump fluid, in like manner enter second evaporimeter, 9 heat releases cooling again, the heat release cooling continuously by evaporimeter like this, last conduct is the net backwater once, returns once net;
Secondary net hot water divides two-way, first via secondary net hot water is introduced into first condenser, 8 sorption type heat pump refrigerant vapor latent heat and heats up, heat up after entering first condenser, 2 sorption type heat pump working medium heats again, the second road secondary net flow of hot water is through water water-to-water heat exchanger 16, by behind the net hot water heat temperature raising once, after first via secondary net hot water last and from first condenser 2 converges, supply water, enter the secondary net as the secondary net.
The working medium of first order compression heat pump 19 forms independently closed circuit, its heat pump fluid closed circuit is as follows: after heat pump fluid is compressed into the high pressure superheater steam by first compressor 1, enter first condenser 2, after being condensed into liquid by secondary net hot water, after directly entering of the refrigerant vapor cooling of first regenerator, 4 quilts from first evaporimeter 3, entering first evaporimeter 3 via the 6 throttling step-downs of first expansion valve absorbs once net hot water heat and evaporates, refrigerant vapor returns first compressor 1 via first regenerator 4 again, so circulation.
The working medium of second level compression heat pump 20 forms independently closed circuit, its heat pump fluid closed circuit is as follows: after heat pump fluid is compressed into the high pressure superheater steam by second compressor 7, enter second condenser 8, after being condensed into liquid by secondary net hot water, after directly entering of the refrigerant vapor cooling of second regenerator, 10 quilts from second evaporimeter 9, entering second evaporimeter 9 via the 12 throttling step-downs of second expansion valve absorbs once net hot water heat and evaporates, refrigerant vapor returns second compressor 7 via second regenerator 10 again, so circulation.
A kind of twin-stage compression heat pump type heat exchange unit, as shown in Figure 2, on the basis of the device of embodiment 1, in described first order compression heat pump 19, increase by first subcooler 5, described first subcooler 5 is connected between described first condenser 2 and described first regenerator 4; Wherein one road pipeline on secondary webmaster road with described second condenser 8 be connected in series with described first condenser 2 again after described first subcooler 5 is in parallel.
And in described second level compression heat pump 20, increase by second economizer 11 and second control valve 13; Described second economizer 11 is connected between described second condenser 8 and described second regenerator 10; Described second condenser, 8 export pipelines divide two-way, and one the tunnel after described second control valve 13 connects the shell side of described second economizer 11, and the pipeline that is connected described second compressor 7 with described second regenerator 10 converges; Another road connects the tube side of described second economizer 11, is connected with described second regenerator 10 again.
Specifically, once net hot water flow process with embodiment 1; Secondary net hot water divides two-way, first via secondary net hot water divides earlier two stocks not enter second condenser 8 and first subcooler, 5 sorption type heat pump refrigerant vapor latent heat and heats up, converge again and enter first condenser, 2 sorption type heat pump working medium heats after heat up, the second road secondary net flow of hot water is through water water-to-water heat exchanger 16, by behind the net hot water heat temperature raising once, after secondary net hot water last and from first condenser 2 converges, supply water, enter the secondary net as the secondary net.
First order compression heat pump 19 working medium form independently closed circuit, from the refrigerant vapor of first evaporimeter 3, first regenerator 4 by 1 compression of first compressor after, entering first condenser 2 is cooled off from secondary net hot water, enter first subcooler 5 again by after the secondary net backwater cooling, entering first regenerator 4 carries out once more cold excessively, after first expansion valve 6 enters first evaporimeter 3 absorbs once behind the net hot water heat and evaporate, refrigerant vapor enters first compressor 1 through regenerator, and heat pump fluid so circulates;
A kind of twin-stage compression heat pump type heat exchange unit, as shown in Figure 3, on the basis of the device of embodiment 1, in described first order compression heat pump 19, increase by first subcooler 5, described first subcooler 5 is connected between described first condenser 2 and described first regenerator 4; Wherein one road pipeline on secondary webmaster road with described second condenser 8 be connected in series with described first condenser 2 again after described first subcooler 5 is in parallel.
And in described second level compression heat pump 20, increase by second subcooler 14, second economizer 11 and second control valve 13, described second condenser 8 is connected with described second regenerator 10 with after described second subcooler 14 and described second economizer 11 are connected successively again; Described second subcooler, 14 export pipelines divide two-way, and one the tunnel after described second control valve 13 connects the shell side of described second economizer 11, and the pipeline that is connected described second compressor 7 with described second regenerator 10 converges; Another road connects the tube side of described second economizer 11, described second regenerator 10 of connecting again; Wherein one road pipeline on secondary webmaster road with described second subcooler 14 with after described second condenser 8 is connected, in parallel with described first subcooler 5, be connected in series with described first condenser 2 again.
Specifically, once net hot water flow process with embodiment 1; The first via hot water of secondary net before entering second condenser 8, first chiller-heat pump worker quality liquid in second subcooler 14, all the other are identical with embodiment 2.
The working medium of second level compression heat pump 20 enters second subcooler 14 by the cooling of secondary net hot water, and then enters second economizer 11 after second condenser 8 is condensed into liquid, and other flow process of working medium is all identical with embodiment 2.
A kind of twin-stage compression heat pump type heat exchange unit, as shown in Figure 4, on the basis of the device of embodiment 1, increase by first economizer 17 and first control valve 18 in described first order compression heat pump 19, described first economizer 17 is connected between described first condenser 2 and described first regenerator 4; Described first condenser, 2 export pipelines divide two-way, and one the tunnel after described first control valve 13 connects the shell side of described first economizer 17, and the pipeline that is connected described first compressor 1 with described first regenerator 4 converges; Another road connects the tube side of described first economizer 17, is connected with described first regenerator 4 again;
And in described second level compression heat pump 20, increase by second economizer 11 and second control valve 13; Described second economizer 11 is connected between described second condenser 8 and described second regenerator 10; Described second condenser, 8 export pipelines divide two-way, and one the tunnel after described second control valve 13 connects the shell side of described second economizer 11, and the pipeline that is connected described second compressor 7 with described second regenerator 10 converges; Another road connects the tube side of described second economizer 11, is connected with described second regenerator 10 again.
Specifically, once net hot water flow process and secondary net hot water flow process all with embodiment 1;
First order compression heat pump 19 working medium form independently closed circuit, its heat pump fluid closed circuit is as follows: from first evaporimeter 3, after the refrigerant vapor of first regenerator 4 and first economizer 17 is compressed by first compressor 1, after entering first condenser 2 and being condensed into liquid by secondary net hot water, divide two-way, one road worker quality liquid enters in the heat exchanger in first economizer 17, another road worker quality liquid enters in first economizer 17 after 18 step-downs of first control valve, cool off the interior worker quality liquid of heat exchanger of first economizer, cross worker quality liquid after cold via first regenerator 4 once more and after cooling off to the refrigerant vapor heat release, throttling step-down by first expansion valve 6 enters first evaporimeter 3, absorb once net hot water heat and evaporate, at last enter first compressor 1 with refrigerant vapor, so circulation from first economizer 17 via first regenerator 4.
In the described twin-stage compression heat pump of the above embodiment type heat exchange unit, adoptable heat pump fluid is any one among R22, R134a or the R410A.
Claims (6)
1. a twin-stage compression heat pump type heat exchange unit is characterized in that, this device is made up of water water-to-water heat exchanger (16), first order compression heat pump (19), second level compression heat pump (20), connecting line and annex;
First order compression heat pump (19) comprises first compressor (1), first condenser (2), first evaporimeter (3), first regenerator (4), first expansion valve (6); First evaporimeter (3), first regenerator (4), first compressor (1), first condenser (2) are connected in series successively, described first condenser (2) links to each other with described first evaporimeter (3) through first expansion valve (6) with after described first regenerator (4) is connected again; First order heat pump fluid forms independently closed circuit;
Second level compression heat pump (20) comprises second compressor (7), second condenser (8), second evaporimeter (9), second regenerator (10), second expansion valve (12); Second evaporimeter (9), second regenerator (10), second compressor (7), second condenser (8) are connected in series successively, described second condenser (8) links to each other with described second evaporimeter (9) through second expansion valve (12) with after described second regenerator (10) is connected again; Second level heat pump fluid forms independently closed circuit;
The water circuit system of connecting line is divided into webmaster road and secondary webmaster road two parts in the described device; No. one time the webmaster road is connected in series water water-to-water heat exchanger (16) and first evaporimeter (3) of first order compression heat pump (19) and second evaporimeter (9) of second level compression heat pump (21) successively; Two-way is divided on secondary webmaster road, after wherein one road pipeline is connected in series second condenser (8) and first condenser (2) successively, converges with another road pipeline that is connected water water-to-water heat exchanger (16) again.
2. twin-stage compression heat pump type heat exchange unit according to claim 1, it is characterized in that, described first order compression heat pump (19) also comprises first subcooler (5), and described first subcooler (5) is connected between described first condenser (2) and described first regenerator (4); Wherein one road pipeline on secondary webmaster road with described second condenser (8) be connected in series with described first condenser (2) again after described first subcooler (5) is in parallel.
3. twin-stage compression heat pump type heat exchange unit according to claim 2 is characterized in that described second level compression heat pump (20) also comprises second economizer (11) and second control valve (13); Described second economizer (11) is connected between described second condenser (8) and described second regenerator (10); Described second condenser (8) export pipeline divides two-way, and one the tunnel after described second control valve (13) connects the shell side of described second economizer (11), and the pipeline that is connected described second compressor (7) with described second regenerator (10) converges; Another road connects the tube side of described second economizer (11), is connected with described second regenerator (10) again.
4. twin-stage compression heat pump type heat exchange unit according to claim 2, it is characterized in that, described second level compression heat pump (20) also comprises second subcooler (14), second economizer (11) and second control valve (13), described second condenser (8) is connected with described second regenerator (10) with after described second subcooler (14) and described second economizer (11) are connected successively again; Described second subcooler (14) export pipeline divides two-way, and one the tunnel after described second control valve (13) connects the shell side of described second economizer (11), and the pipeline that is connected described second compressor (7) with described second regenerator (10) converges; Another road connects the tube side of described second economizer (11), described second regenerator (10) of connecting again; Wherein one road pipeline on secondary webmaster road with described second subcooler (14) with after described second condenser (8) is connected, in parallel with described first subcooler (5), be connected in series with described first condenser (2) again.
5. twin-stage compression heat pump type heat exchange unit according to claim 1, it is characterized in that, described first order compression heat pump (19) also comprises first economizer (17) and first control valve (18), and described first economizer (17) is connected between described first condenser (2) and described first regenerator (4); Described first condenser (2) export pipeline divides two-way, and one the tunnel after described first control valve (13) connects the shell side of described first economizer (17), and the pipeline that is connected described first compressor (1) with described first regenerator (4) converges; Another road connects the tube side of described first economizer (17), is connected with described first regenerator (4) again;
Described second level compression heat pump (20) also comprises second economizer (11) and second control valve (13); Described second economizer (11) is connected between described second condenser (8) and described second regenerator (10); Described second condenser (8) export pipeline divides two-way, and one the tunnel after described second control valve (13) connects the shell side of described second economizer (11), and the pipeline that is connected described second compressor (7) with described second regenerator (10) converges; Another road connects the tube side of described second economizer (11), is connected with described second regenerator (10) again.
6. according to the described twin-stage compression heat pump of any one claim of claim 1 to 5 type heat exchange unit, it is characterized in that described heat pump fluid is any one among R22, R134a or the R410A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020551499 CN201819296U (en) | 2010-09-29 | 2010-09-29 | Two-stage compression heat pump type heat exchanger unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020551499 CN201819296U (en) | 2010-09-29 | 2010-09-29 | Two-stage compression heat pump type heat exchanger unit |
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| CN201819296U true CN201819296U (en) | 2011-05-04 |
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| CN 201020551499 Expired - Lifetime CN201819296U (en) | 2010-09-29 | 2010-09-29 | Two-stage compression heat pump type heat exchanger unit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589034A (en) * | 2012-03-01 | 2012-07-18 | 清华大学 | Two-stage generation and two-stage condensation jet type heat exchanger unit |
| CN102589033A (en) * | 2012-03-01 | 2012-07-18 | 清华大学 | Jet type heat exchanger unit with two-stage-belt heat regenerator |
| CN102628636A (en) * | 2012-04-28 | 2012-08-08 | 肖舸 | Composite plate drying method and drying system |
| CN103982933A (en) * | 2014-05-26 | 2014-08-13 | 北京建筑大学 | Spraying-compression combination type large temperature difference heat exchanger unit |
| CN104728820A (en) * | 2013-12-18 | 2015-06-24 | 苟仲武 | Heat pump electric steam-water boiler |
| CN110486943A (en) * | 2019-09-05 | 2019-11-22 | 天津商业大学 | The not exclusively cooling moderate and high temperature heat system of throttling among the more condensers of multi-stage compression |
| CN111503706A (en) * | 2020-06-02 | 2020-08-07 | 烟台龙源电力技术股份有限公司 | Central heating system |
| CN112944445A (en) * | 2021-04-15 | 2021-06-11 | 晟源高科(北京)科技有限公司 | Series-parallel combination compression type heat pump heating system and switching method thereof |
| CN113357692A (en) * | 2021-06-04 | 2021-09-07 | 中国科学院广州能源研究所 | Circulating water waste heat recovery system of thermal power plant |
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2010
- 2010-09-29 CN CN 201020551499 patent/CN201819296U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589034A (en) * | 2012-03-01 | 2012-07-18 | 清华大学 | Two-stage generation and two-stage condensation jet type heat exchanger unit |
| CN102589033A (en) * | 2012-03-01 | 2012-07-18 | 清华大学 | Jet type heat exchanger unit with two-stage-belt heat regenerator |
| CN102589034B (en) * | 2012-03-01 | 2014-04-16 | 清华大学 | Two-stage generation and two-stage condensation jet type heat exchanger unit |
| CN102628636A (en) * | 2012-04-28 | 2012-08-08 | 肖舸 | Composite plate drying method and drying system |
| CN104728820A (en) * | 2013-12-18 | 2015-06-24 | 苟仲武 | Heat pump electric steam-water boiler |
| CN103982933A (en) * | 2014-05-26 | 2014-08-13 | 北京建筑大学 | Spraying-compression combination type large temperature difference heat exchanger unit |
| CN103982933B (en) * | 2014-05-26 | 2016-04-06 | 北京建筑大学 | The large temperature difference heat-exchange unit of injection-compression combined formula |
| CN110486943A (en) * | 2019-09-05 | 2019-11-22 | 天津商业大学 | The not exclusively cooling moderate and high temperature heat system of throttling among the more condensers of multi-stage compression |
| CN111503706A (en) * | 2020-06-02 | 2020-08-07 | 烟台龙源电力技术股份有限公司 | Central heating system |
| CN112944445A (en) * | 2021-04-15 | 2021-06-11 | 晟源高科(北京)科技有限公司 | Series-parallel combination compression type heat pump heating system and switching method thereof |
| CN113357692A (en) * | 2021-06-04 | 2021-09-07 | 中国科学院广州能源研究所 | Circulating water waste heat recovery system of thermal power plant |
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