CN103776189A - Gas-supplying enthalpy-increasing type heat pump circulating system with ejector for heat pump device - Google Patents
Gas-supplying enthalpy-increasing type heat pump circulating system with ejector for heat pump device Download PDFInfo
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- CN103776189A CN103776189A CN201410022664.8A CN201410022664A CN103776189A CN 103776189 A CN103776189 A CN 103776189A CN 201410022664 A CN201410022664 A CN 201410022664A CN 103776189 A CN103776189 A CN 103776189A
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Abstract
The invention relates to a gas-supplying enthalpy-increasing type heat pump circulating system with an ejector for a heat pump device. An outlet of a compressor is connected with an inlet of a condenser, an outlet of the condenser is connected with a nozzle inlet of the ejector, an injected refrigerating agent inlet of the ejector is connected with a gas phase outlet of a second-stage flash evaporator, and an outlet of the ejector is connected with an inlet of a first-stage flash evaporator; a saturated gaseous refrigerating agent outlet of the first-stage flash evaporator is connected with an intermediate gas-supplying port of the compressor, and a saturated liquid refrigerating agent outlet of the first-stage flash evaporator is connected with an inlet of the second-stage flash evaporator after passing through a first-stage expansion valve or a capillary tube; a saturated gaseous refrigerating agent outlet of the second-stage flash evaporator is connected with the injected refrigerating agent inlet of the ejector, and a saturated liquid refrigerating agent outlet of the second-stage flash evaporator is connected with an inlet of an evaporator after passing through a second-stage expansion valve or a capillary tube; an outlet of the evaporator is connected with an air suction port of the compressor. Through the adoption of the ejector and the auxiliary flash evaporators, the recycling of expansion work during the throttling process is realized, and meanwhile the intermediate-stage gas-supplying amount of the compressor is increased, thus the heating performance of the heat pump system is improved.
Description
Technical field
The invention belongs to technical field of heat pumps, be specifically related to a kind of tonifying Qi with injector for heat pump assembly and increase enthalpy type heat pump circulating system.
Background technology
The confession that steam compression type air source heat pump technology is applied to commercial building and house more and more as a kind of technology that heats of energy-saving and environmental protection is hankered, as heat pump type air conditioner and Teat pump boiler.Along with the raising of economic development and living standards of the people, air source heat pump is very rapid in the development of China, and the research of correlation technique is also being constantly brought forth new ideas.But, in the time that steam compression type air source heat pump uses under lower outdoor air environment temperature, compressor suction and discharge pressure reduction increases, the density of the cold-producing medium that compressor sucks reduces, the circular flow of heat pump internal refrigeration storage agent reduces, cause heat pump to reduce to the indoor heat providing, the decay of heat pump heating performance is that efficiency and heating capacity reduction are the outstanding technical problems that its exists, and applies on a large scale thereby affect it.For making air source heat pump efficient, safe operation in low temperature environment, people have carried out many technical researches and improvement, and what wherein application was at present more is to adopt the circulatory system that increases enthalpy with tonifying Qi, claims again air injection enthalpy-increasing system.In a word, application tonifying Qi increasing enthalpy system is one of effective technical way solving net for air-source heat pump units cold operation hydraulic performance decline.
At present, conventional tonifying Qi increasing enthalpy type heat pump circulating system mainly comprises the parts such as compressor, condenser, evaporimeter, flash vessel and expansion valve or capillary; Wherein, compressor is screw compressor or the two-stage rolling rotor compressor with tonifying Qi enthalpy-increasing function, and its compression process is divided into two sections by tonifying Qi process, and two-stage compression process becomes to be as the criterion.But, increase in enthalpy type heat pump circulating system in existing tonifying Qi, mainly still to adopt throttle mechanism expansion valve or capillary owing to realizing the expansion process of cold-producing medium, thereby produce larger irreversible loss in its throttling process, and strengthen along with evaporating temperature reduces irreversible loss, cause circulatory system performance significantly to reduce.In fact, the throttling process of cold-producing medium has available expansion work, can increase in enthalpy type heat pump circulating system and adopt additional injector to reclaim the demi-inflation merit of throttling process in current tonifying Qi, make the performance of the circulatory system obtain raising, improve heating performance attenuation under low temperature environment.
Much research shows, adopts injector really can improve the performance of refrigeration and heat pump assembly in vapor-compression cycle system.But at present about the application of injector in vapor-compression cycle system, great majority are the one-stage steam compressed formula circulatory systems for routine.Generally speaking, also there is blank in the technical measures of application sprayers in tonifying Qi increasing enthalpy type heat pump circulating system.
Summary of the invention
For solving above-mentioned problems of the prior art, the object of the present invention is to provide for the tonifying Qi with injector of heat pump assembly and increase enthalpy type heat pump circulating system, by adopting injector to reclaim the expansion work of throttling process, thereby make the tonifying Qi increasing enthalpy type heat pump circulating system with injector there is higher efficiency, reduce the consumption of EGR energy; And utilize the gaseous refrigerant in the flash vessel of the injector injection second level, and increase the air compensation of compressor intergrade, further effectively solve the heating capacity attenuation problem of air source heat pump system in the time of low ambient temperature.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of tonifying Qi with injector for heat pump assembly increases enthalpy type heat pump circulating system, comprise compressor 101, the outlet of compressor 101 is connected with the entrance of condenser 102, the outlet of condenser 102 is connected with the nozzle entrance of injector 103, being connected with the gaseous phase outlet of second level flash vessel 106 by injection refrigerant inlet of injector 103, the outlet of injector 103 is connected with the entrance of first order flash vessel 104; First order flash vessel 104 outlet point two-way, the one saturated gaseous state refrigerant outlet in road is connected with complemental air mouth in the middle of compressor 101, and the saturated liquid refrigerant outlet in another road is connected with second level flash vessel 106 entrances after first order expansion valve or capillary 105; Second level flash vessel 106 outlet point two-way, the one saturated gaseous state refrigerant outlet in road is connected by injection refrigerant inlet with injector 103, and the saturated liquid refrigerant outlet in another road is connected with evaporimeter 108 entrances after second level expansion valve or capillary 107; Evaporimeter 108 outlets are connected with compressor 101 air entries.
Described compressor 101 adopts the compressor with tonifying Qi enthalpy-increasing function, and it has two-stage air entry, is respectively low pressure air suction mouth and middle gas supplementing opening.
The described compressor with tonifying Qi enthalpy-increasing function is screw compressor or two-stage rolling rotor compressor.
The sub-cooled liquid refrigerant pressure exporting from condenser 102 in described injector 103 is greater than from second level flash vessel 106 gaseous phase outlets refrigerant vapour pressure out.
The sub-cooled liquid refrigerant injection that the refrigerant vapour of described second level flash vessel 106 gaseous phase outlets is exported from condenser 102 in injector 103 mixes rear supercharging and enters first order flash vessel 104 in injector 103.
Increase enthalpy type heat pump circulating system than existing tonifying Qi, a kind of tonifying Qi with injector that the present invention proposes increases enthalpy type heat pump circulating system, by adopting injector to reclaim the expansion work of throttling process, thereby make the tonifying Qi increasing enthalpy air source heat pump circulatory system with injector there is higher efficiency, reduce the consumption of heat pump energy.Meanwhile, utilize the gaseous refrigerant in the flash vessel of the injector injection second level, increased the air compensation of compressor intergrade, further effectively solved the heating capacity attenuation problem of air source heat pump system in the time of low ambient temperature.This system is a kind of economy, effective, feasible improvement scheme, can effectively improve heat pump circulating system performance, can promote the development of heat pump product power-saving technology.
Accompanying drawing explanation
Fig. 1 is cooling cycle system schematic diagram of the present invention.
Fig. 2 is the circulation pressure-enthalpy diagram (p – h figure) of the cooling cycle system course of work of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, a kind of tonifying Qi with injector for heat pump assembly of the present invention increases enthalpy type heat pump circulating system, comprise compressor 101, the outlet of compressor 101 is connected with the entrance of condenser 102, the outlet of condenser 102 is connected with the nozzle entrance of injector 103, being connected with the gaseous phase outlet of second level flash vessel 106 by injection refrigerant inlet of injector 103, the outlet of injector 103 is connected with the entrance of first order flash vessel 104; First order flash vessel 104 outlet point two-way, the one saturated gaseous state refrigerant outlet in road is connected with complemental air mouth in the middle of compressor 101, and the saturated liquid refrigerant outlet in another road is connected with second level flash vessel 106 entrances after first order expansion valve or capillary 105; Second level flash vessel 106 outlet point two-way, the one saturated gaseous state refrigerant outlet in road is connected by injection refrigerant inlet with injector 103, and the saturated liquid refrigerant outlet in another road is connected with evaporimeter 108 entrances after second level expansion valve or capillary 107; Evaporimeter 108 outlets are connected with compressor 101 air entries.
Described compressor 101 adopts the compressor with tonifying Qi enthalpy-increasing function, and it has two-stage air entry, is respectively low pressure air suction mouth and middle gas supplementing opening.
As the preferred embodiment of the present invention, described in there is tonifying Qi enthalpy-increasing function compressor be screw compressor or two-stage rolling rotor compressor.
As the preferred embodiment of the present invention, the sub-cooled liquid refrigerant pressure exporting from condenser 102 in described injector 103 is greater than from second level flash vessel 106 gaseous phase outlets refrigerant vapour pressure out.Like this high pressure sub-cooled liquid refrigerant enter as working fluid in the nozzle of injector 103, pressure energy is converted into speed can after become low-voltage high speed gas-liquid two-phase mix refrigerant, thereby injection is from second level flash vessel 106 gaseous phase outlets refrigerant vapour out, and export the gas-liquid two-phase mix refrigerant of mineralization pressure higher than the refrigerant vapour of second level flash vessel 106 gaseous phase outlets at injector, reach the object that improves the middle tonifying Qi pressure decreased of compressor energy consumption.
As the preferred embodiment of the present invention, the sub-cooled liquid refrigerant injection that the refrigerant vapour of described second level flash vessel 106 gaseous phase outlets is exported from condenser 102 in injector 103 mixes rear supercharging and enters first order flash vessel 104 in injector 103.Increase like this air compensation of compressor intergrade, further effectively solved the heating capacity attenuation problem of air source heat pump system in the time of low ambient temperature.
As shown in Figure 2, for the circulation pressure-enthalpy diagram (p – h figure) of the cooling cycle system course of work of the present invention, the refrigeration system course of work of its signal is: the overheated gaseous refrigerant of HTHP (locating for 2 in figure) that compressor 101 exports is emitted after heat realization heats object and become high pressure sub-cooled liquid refrigerant (locating in figure) at 3 at condenser 102, the sub-cooled liquid refrigerant that condenser 102 exports enters the nozzle of injector 103 as working fluid, after expanding, become low-voltage high speed gas-liquid two-phase mix refrigerant (3 ' some place in figure) in nozzle, (4 ' some place in figure) discharge through the diffuser supercharging of injector 103 becomes gas-liquid two-phase mix refrigerant (locating in figure) at 4 after again after low-voltage high speed gas-liquid two-phase mix refrigerant mixes in the mixing chamber of injector 103 with from saturated gaseous refrigerant out of second level flash vessel 106 (in figure 8), the gas-liquid two-phase mix refrigerant that injector 103 exports enters first order flash vessel 104 and carries out gas-liquid separation, wherein return to the middle gas supplementing opening of compressor 101 at 5 from the isolated saturated gaseous refrigerant of first order flash vessel 104 (in figure), and isolated saturated liquid refrigerant (locating for 6 in figure) by the 105 step-downs coolings of first order expansion valve or capillary after (in figure, locating for 7) enter and in second level flash vessel 106, carry out gas-liquid separation, wherein from the isolated saturated gaseous refrigerant of second level flash vessel 106 (in figure 8) as the injection entrance that is entered injector 103 by injection cold-producing medium, and isolated saturated liquid refrigerant (locating for 9 in figure) by the 107 step-downs coolings of second level expansion valve or capillary after (in figure, locating for 10) enter in evaporimeter 108 heat absorption evaporation and become in gaseous refrigerant figure at 1 and locate), the gaseous refrigerant that evaporimeter 108 exports enters compressor 101 air entries, more than completes whole cyclic process.
In whole system On The Cycle Working Process of the present invention, having four different operating pressures, is citation jet body pressure and evaporimeter 108 evaporating pressures of tonifying Qi pressure in the middle of condenser 102 condensing pressures, compressor 101, injector 103 successively.Wherein condenser 102 condensing pressures and evaporimeter 108 evaporating pressures are determined (i.e. a condensation temperature and an evaporating temperature) by the work operating mode of the circulatory system, and this depends on again and heats temperature requirement and air ambient temperature; In the middle of compressor 101, tonifying Qi pressure is design conditions parameter, can choose according to condensing pressure and evaporating pressure; The citation jet body pressure of injector 103 is determined by the conservation of mass, the conservation of momentum and energy conservation relation in the operating characteristic of injector 103, circulation.
Claims (5)
1. the tonifying Qi with injector for heat pump assembly increases enthalpy type heat pump circulating system, comprise compressor (101), the outlet of compressor (101) is connected with the entrance of condenser (102), it is characterized in that: the outlet of condenser (102) is connected with the nozzle entrance of injector (103), being connected with the gaseous phase outlet of second level flash vessel (106) by injection refrigerant inlet of injector (103), the outlet of injector (103) is connected with the entrance of first order flash vessel (104); First order flash vessel (104) outlet point two-way, the one saturated gaseous state refrigerant outlet in road is connected with complemental air mouth in the middle of compressor (101), and the saturated liquid refrigerant outlet in another road is connected with second level flash vessel (106) entrance after first order expansion valve or capillary (105); Second level flash vessel (106) outlet point two-way, the one saturated gaseous state refrigerant outlet in road is connected by injection refrigerant inlet with injector (103), and the saturated liquid refrigerant outlet in another road is connected with evaporimeter (108) entrance after second level expansion valve or capillary (107); Evaporimeter (108) outlet is connected with compressor (101) air entry.
2. the tonifying Qi with injector for heat pump assembly according to claim 1 increases enthalpy type heat pump circulating system, it is characterized in that: described compressor (101) adopts the compressor with tonifying Qi enthalpy-increasing function, it has two-stage air entry, is respectively low pressure air suction mouth and middle gas supplementing opening.
3. the tonifying Qi with injector for heat pump assembly according to claim 2 increases enthalpy type heat pump circulating system, it is characterized in that: described in there is tonifying Qi enthalpy-increasing function compressor be screw compressor or two-stage rolling rotor compressor.
4. the tonifying Qi with injector for heat pump assembly according to claim 1 increases enthalpy type heat pump circulating system, it is characterized in that: in described injector (103), be greater than from second level flash vessel (106) gaseous phase outlet refrigerant vapour pressure out from the sub-cooled liquid refrigerant pressure of condenser (102) outlet.
5. the tonifying Qi with injector for heat pump assembly according to claim 1 and 2 increases enthalpy type heat pump circulating system, it is characterized in that: the refrigerant vapour of described second level flash vessel (106) gaseous phase outlet by the sub-cooled liquid refrigerant injection from condenser (102) outlet, mixes rear supercharging and enters first order flash vessel (104) in injector (103) in injector (103).
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104949372A (en) * | 2015-05-29 | 2015-09-30 | 浙江工业大学 | Novel compression-assisted ejector refrigeration system with gas-liquid separator |
| CN105627608A (en) * | 2016-01-13 | 2016-06-01 | 西安交通大学 | Auto-cascade steam compression type refrigeration cycle system synergized by gas-gas ejector |
| CN106152582A (en) * | 2016-07-11 | 2016-11-23 | 格力电器（芜湖）有限公司 | A kind of air conditioning system |
| CN106705308A (en) * | 2017-02-03 | 2017-05-24 | 江苏乐科节能科技股份有限公司 | Mechanical flash type air conditioning refrigeration system and working method thereof |
| CN108007012A (en) * | 2017-11-29 | 2018-05-08 | 浙江海洋大学 | A kind of multi-stage temperature refrigerator refrigerating plant and its refrigerating method using jet pump |
| KR20180084872A (en) * | 2015-11-09 | 2018-07-25 | 벡텔 하이드로카본 테크놀로지 솔루션즈, 인코포레이티드 | Systems and methods for multi-stage cooling |
| CN109682100A (en) * | 2018-11-02 | 2019-04-26 | 浙江理工大学 | A kind of double-stage compressive refrigerating system reducing delivery temperature using jet pipe, diffuser pipe |
| CN110319612A (en) * | 2019-06-29 | 2019-10-11 | 西安交通大学 | The carbon dioxide two-stage refrigeration circulatory system and its working method of injector synergy |
| CN110701810A (en) * | 2019-10-29 | 2020-01-17 | 中机国能炼化工程有限公司 | Injection supercharging two-stage series connection supercooling double-temperature-zone refrigerating system and application |
| CN114608215A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | High-energy-efficiency transcritical carbon dioxide two-stage compression cold-heat combined supply system |
| CN114608216A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | Defrosting method of high-energy-efficiency transcritical carbon dioxide double-stage compression cold-hot combined supply system |
| US11725858B1 (en) | 2022-03-08 | 2023-08-15 | Bechtel Energy Technologies & Solutions, Inc. | Systems and methods for regenerative ejector-based cooling cycles |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949372A (en) * | 2015-05-29 | 2015-09-30 | 浙江工业大学 | Novel compression-assisted ejector refrigeration system with gas-liquid separator |
| JP2019535991A (en) * | 2015-11-09 | 2019-12-12 | ベクテル ハイドロカーボン テクノロジー ソリューションズ インコーポレイテッド | Multi-stage refrigeration system and method |
| US10514202B2 (en) | 2015-11-09 | 2019-12-24 | Bechtel Hydrocarbon Technology Solutions, Inc. | Systems and methods for multi-stage refrigeration |
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| US10533793B2 (en) | 2015-11-09 | 2020-01-14 | Bechtel Hydrocarbon Technology Solutions, Inc. | Systems and methods for multi-stage refrigeration |
| US10514201B2 (en) | 2015-11-09 | 2019-12-24 | Bechtel Hydrocarbon Technology Solutions, Inc. | Systems and methods for multi-stage refrigeration |
| CN105627608A (en) * | 2016-01-13 | 2016-06-01 | 西安交通大学 | Auto-cascade steam compression type refrigeration cycle system synergized by gas-gas ejector |
| CN106152582A (en) * | 2016-07-11 | 2016-11-23 | 格力电器（芜湖）有限公司 | A kind of air conditioning system |
| CN106705308A (en) * | 2017-02-03 | 2017-05-24 | 江苏乐科节能科技股份有限公司 | Mechanical flash type air conditioning refrigeration system and working method thereof |
| CN108007012A (en) * | 2017-11-29 | 2018-05-08 | 浙江海洋大学 | A kind of multi-stage temperature refrigerator refrigerating plant and its refrigerating method using jet pump |
| CN109682100B (en) * | 2018-11-02 | 2020-12-15 | 浙江理工大学 | Utilize spray tube, diffuser pipe to reduce exhaust temperature's doublestage compression refrigerating system |
| CN109682100A (en) * | 2018-11-02 | 2019-04-26 | 浙江理工大学 | A kind of double-stage compressive refrigerating system reducing delivery temperature using jet pipe, diffuser pipe |
| CN110319612A (en) * | 2019-06-29 | 2019-10-11 | 西安交通大学 | The carbon dioxide two-stage refrigeration circulatory system and its working method of injector synergy |
| CN110701810A (en) * | 2019-10-29 | 2020-01-17 | 中机国能炼化工程有限公司 | Injection supercharging two-stage series connection supercooling double-temperature-zone refrigerating system and application |
| US11725858B1 (en) | 2022-03-08 | 2023-08-15 | Bechtel Energy Technologies & Solutions, Inc. | Systems and methods for regenerative ejector-based cooling cycles |
| CN114608215A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | High-energy-efficiency transcritical carbon dioxide two-stage compression cold-heat combined supply system |
| CN114608216A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | Defrosting method of high-energy-efficiency transcritical carbon dioxide double-stage compression cold-hot combined supply system |
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