CN102997481A - Hot water direct-fired single-double effect composite type lithium bromide absorption refrigerating unit - Google Patents
Hot water direct-fired single-double effect composite type lithium bromide absorption refrigerating unit Download PDFInfo
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- CN102997481A CN102997481A CN2012105163167A CN201210516316A CN102997481A CN 102997481 A CN102997481 A CN 102997481A CN 2012105163167 A CN2012105163167 A CN 2012105163167A CN 201210516316 A CN201210516316 A CN 201210516316A CN 102997481 A CN102997481 A CN 102997481A
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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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]
- Y02B30/62—Absorption based systems
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Abstract
The invention relates to a hot water direct-fired single-double effect composite type lithium bromide absorption refrigerating unit, and belongs to the technical field of air-conditioning equipment. The hot water direct-fired single-double effect composite type lithium bromide absorption refrigerating unit comprises a direct-fired high-voltage generator (7), an evaporator, an absorber, a steam generator (15), a hot water generator (17), a condenser (18), a heat exchanger, a solution pump and a refrigerant pump (35). The hot water direct-fired single-double effect composite type lithium bromide absorption refrigerating unit is characterized in that the evaporator comprises a single effect evaporator (27) and a double effect evaporator (3), and the absorber comprises a single effect absorber (29) and a double effect absorber (4); the single effect evaporator (27) and the single effect absorber (29) are arranged in a same cavity chamber, and the double effect evaporator (3) and the double effect absorber (4) is arranged in the other cavity chamber; and cold water flow paths of the single effect evaporator (27) and the double effect evaporator (3) adopt a serial flow path, and cold water enters from the single effect evaporator (27) and flows out from the double effect evaporator (3). The unit provided by the invention can reduce the dilute solution concentration of hot water in single effect circulation.
Description
Technical field
The present invention relates to a kind of lithium-bromide absorption-type refrigerating machine group.Belong to air conditioner technical field.
Background technology
Hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit in the past as shown in Figure 1, this unit is made of pipeline, the valve of Direct Fired High Pressure Generator 7, evaporimeter 36, absorber 37, hot water generator 17, steam generator 15, condenser 18, high-temperature heat exchanger 6, low temperature heat exchanger 5, single-action heat exchanger 24, economic benefits and social benefits solution pump 34, single-action solution pump 32, cryogenic fluid pump 35, control system (not shown) and connecting components.Wherein, the heat-exchanging tube bundle of hot water generator, steam generator and condenser three parts is arranged in the same low condenser cylindrical shell 14 that feels cold, and consists of the compound low condenser that feels cold; The solution circulation workflow of unit by one independently hot water single-action kind of refrigeration cycle workflow and one independently direct combustion dual-effect refrigeration periodic duty flow process form single-action kind of refrigeration cycle and the same evaporimeter of dual-effect refrigeration cycle sharing, same absorber and same condenser.This unit is mainly used in solar air-conditioner system, distributed energy resource system, waste heat water-heating cooling (heat supply) etc. and has simultaneously hot water, fuel and cold (heat) demand, but hot water flow, the place that heat is unstable or water-heating cooling (heat supply) amount can not satisfy cooling (heat) demand, the heat drive refrigerating operaton that can utilize at the same time or separately hot water heat and direct combustion fuel to produce, the heat drive heat supply running that utilizes direct combustion fuel to produce.But because single-action kind of refrigeration cycle and the same absorber of dual-effect refrigeration cycle sharing of this unit, the weak solution concentration of hot water single-action circulation higher (identical with the weak solution concentration of flue gas economic benefits and social benefits circulation), so that the occurrence temperature of hot water generator is higher, during refrigerating operaton, the hot water outlet temperature can only be reduced to about 85 ℃ under conventional cooling water inlet temperature (about such as 32 ℃) and cold water outlet temperature (about such as 7 ℃) condition.But the supply water temperature of most thermal source hot water (spent hot water who produces such as solar water, underground heat hot water, engine cooling water, various production technology link etc.) all lower (about 85 ℃ ~ 95 ℃), only have hot water backwater's temperature is dropped to lower (as being lower than 80 ℃), could fully recycle afterheat of hot water refrigeration (heat supply), the purpose of reach energy-saving and cost-reducing, increasing economic efficiency, and satisfy simultaneously the places such as generating, technique cooling to the requirement of cooling water return water temperature.Apolegamy hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration machine in the past is difficult to reach these purposes, match simultaneously direct combustion dual effect type cold/hot water machine of lithium bromide group and hot water single-effect type lithium bromide adsorption water chilling unit equipment configuration categories, number of units are increased, thereby increase occupation area of equipment and investment cost.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit that reduces the weak solution concentration of hot water single-action circulation is provided.
The object of the present invention is achieved like this: a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit, comprise Direct Fired High Pressure Generator, evaporimeter, absorber, steam generator, hot water generator, condenser, heat exchanger, solution pump and cryogenic fluid pump, it is characterized in that: described evaporimeter comprises single effect evaporator and double effect evaporator, and absorber comprises single-action absorber and economic benefits and social benefits absorber; Single effect evaporator and single-action absorber are arranged in the chamber, and double effect evaporator and economic benefits and social benefits absorber are arranged in another chamber; The cold water flow process of single effect evaporator and double effect evaporator adopts serial flow, and cold water advances from single effect evaporator, goes out from double effect evaporator.
Hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit of the present invention is provided with the concentrated solution cross over pipe between economic benefits and social benefits absorber feed tube and single-action absorber feed tube, the concentrated solution cross over pipe is provided with the concentrated solution stop valve; Be provided with the weak solution cross over pipe between economic benefits and social benefits absorber liquid capsule and single-action absorber liquid capsule, the weak solution cross over pipe is provided with the weak solution stop valve.
Hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit of the present invention, the heat-exchanging tube bundle of described double effect evaporator, economic benefits and social benefits absorber, single effect evaporator and single-action absorber four parts is arranged in the same evaporation absorber cylindrical shell.
Hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit of the present invention, the heat-exchanging tube bundle of described steam generator, hot water generator and condenser three parts is the left, center, right arrangement form and is arranged in the same low condenser cylindrical shell that feels cold, be provided with demarcation strip in the low condenser cylindrical shell that feels cold, be used for separating economic benefits and social benefits circulation solution and single-action circulation solution.
The invention has the beneficial effects as follows:
The present invention is on hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration machine basis in the past, by the segmentation dividing plate being set in the evaporation absorber cylindrical shell, making evaporation absorber become the two-period form structure to reduce the weak solution concentration of hot water single-action circulation, the occurrence temperature of hot water generator is minimized, thereby make unit energy take full advantage of low-grade heat hydro-thermal amount refrigeration, the hot water outlet temperature is dropped to lower (minimum being down to about 75 ℃), realize UTILIZATION OF VESIDUAL HEAT IN, improve the comprehensive utilization of energy rate, economic benefit is provided.
Description of drawings
Fig. 1 is hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit schematic diagram in the past.
Fig. 2 is hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit embodiment 1 schematic diagram of the present invention.
Fig. 3 is hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit embodiment 2 schematic diagrames of the present invention.
Reference numeral among the figure:
Evaporation absorber cylindrical shell 1, evaporation absorber segmentation dividing plate 2, double effect evaporator 3, economic benefits and social benefits absorber 4, low temperature heat exchanger 5, high-temperature heat exchanger 6, Direct Fired High Pressure Generator 7, drain pipe 8 occurred frequently, solution transfer valve 9, economic benefits and social benefits absorber feed tube 10, smoke exhaust pipe 11, refrigerant vapour pipe 12, steam transfer valve 13, the low condenser cylindrical shell 14 that feels cold, steam generator 15, demarcation strip 16, hot water generator 17, condenser 18, concentrated solution cross over pipe 19, concentrated solution stop valve 20, single-action absorber feed tube 21, the hot water outlet pipe 22, the hot water inlet pipe 23, single-action heat exchanger 24, cooling water outlet pipe 25, cold (heat) water outlet pipe 26, single effect evaporator 27, cold (heat) water inlet pipe 28, single-action absorber 29, weak solution cross over pipe 30, cooling water inlet pipe 31, single-action solution pump 32, weak solution stop valve 33, economic benefits and social benefits solution pump 34, cryogenic fluid pump 35, evaporimeter 36, absorber 37, absorber feed tube 38, burner 39.
The specific embodiment
The present invention is unit as shown in Figure 2, and this unit is by the pipeline of Direct Fired High Pressure Generator 7, double effect evaporator 3, economic benefits and social benefits absorber 4, economic benefits and social benefits solution pump 34, high-temperature heat exchanger 6, low temperature heat exchanger 5, steam generator 15, condenser 18, single effect evaporator 27, single-action absorber 29, single-action solution pump 32, single-action heat exchanger 24, hot water generator 17, cryogenic fluid pump 35, control system (not shown) and connecting components, novel hot water direct-fired single-double effect compound type lithium bromide absorption type hot and cold water unit that valve consists of.Single effect evaporator 27 and double effect evaporator 3 general designation evaporimeters.Single-action absorber 29 and economic benefits and social benefits absorber 4 general designation absorbers.Single-action solution pump 32 and economic benefits and social benefits solution pump 34 general designation solution pumps.High-temperature heat exchanger 6, low temperature heat exchanger 5 and single-action heat exchanger 24 general designation heat exchangers.Wherein, the heat-exchanging tube bundle of steam generator 15, hot water generator 17 and condenser 18 3 parts is the left, center, right arrangement form and is arranged in the same low condenser cylindrical shell 14 that feels cold, to reduce the height of unit, be provided with demarcation strip 16 in the low condenser cylindrical shell 14 that feels cold, be used for separating economic benefits and social benefits circulation solution and single-action circulation solution; The heat-exchanging tube bundle of double effect evaporator 3, economic benefits and social benefits absorber 4, single effect evaporator 27 and single-action absorber 29 4 parts is arranged in the same evaporation absorber cylindrical shell 1, be provided with evaporation absorber segmentation dividing plate 2 in the evaporation absorber cylindrical shell 1, the heat-exchanging tube bundle of double effect evaporator and economic benefits and social benefits absorber and single effect evaporator and single-action absorber is separated in two chambers, make evaporation absorber become the two-period form structure, the cold water of single effect evaporator 27 and double effect evaporator 3 is serial flow (being the two-period form sweat cooling), cold water advances from single effect evaporator 27, goes out from double effect evaporator 3; Be provided with concentrated solution cross over pipe 19 between economic benefits and social benefits absorber feed tube 10 and single-action absorber feed tube 21, concentrated solution cross over pipe 19 is provided with concentrated solution stop valve 20; Be provided with weak solution cross over pipe 30 between economic benefits and social benefits absorber liquid capsule and single-action absorber liquid capsule, weak solution cross over pipe 30 is provided with weak solution stop valve 33; Pipeline between drain pipe 8 occurred frequently and economic benefits and social benefits absorber 4 is equipped with solution transfer valve 9; Pipeline between refrigerant vapour pipe 12 and double effect evaporator 3 is equipped with steam transfer valve 13.
When unit utilized the heat refrigerating operaton of hot water and combustion fuel generation simultaneously, solution transfer valve, steam transfer valve, concentrated solution stop valve and weak solution stop valve were closed, and unit is pressed single-double effect compound type kind of refrigeration cycle process flow operation.Single-action solution circulation flow process is: single-action absorber → single-action solution pump → single-action heat exchanger → hot water generator → single-action heat exchanger → single-action absorber; Economic benefits and social benefits solution circulation flow process is: economic benefits and social benefits absorber → economic benefits and social benefits solution pump → low temperature heat exchanger → high-temperature heat exchanger → direct combustion high pressure generator → high-temperature heat exchanger → steam generator → low temperature heat exchanger → economic benefits and social benefits absorber.Direct Fired High Pressure Generator is joined the interior lithium-bromide solution of heat heating Direct Fired High Pressure Generator that burner combustion fuel provides, and the flue-gas temperature that combustion fuel produces goes out unit (entering atmosphere through external chimney) from smoke exhaust pipe 11 after reducing.Hot water from external device (ED) (or system) enters hot water generator heating lithium-bromide solution from hot water inlet pipe 22, and the temperature reduction goes out unit by hot water outlet pipe 23, returning to external device (or system).The cooling moisture three tunnel that enters unit from cooling water inlet pipe 31 enters single-action absorber, economic benefits and social benefits absorber and the condenser of unit, and absorption process and the condensation process of unit cooled, and temperature raises and goes out unit by cooling water outlet pipe 25.The cold water that enters unit from cold (heat) water inlet pipe 28 is introduced in single effect evaporator 27 heat exchanger tubes, by the outer water as refrigerant evaporation endothermic cooling (being sweat cooling) of single effect evaporator pipe, enter again in double effect evaporator 3 heat exchanger tubes, gone out unit by the further cooling of the outer water as refrigerant evaporation endothermic of double-effect evaporation organ pipe by cold (heat) water outlet pipe 26, make the sweat cooling process become the two-period form process, the cold water out temperature of single effect evaporator, evaporating temperature and evaporating pressure all are higher than the cold water out temperature of double effect evaporator, evaporating temperature and evaporating pressure, thereby the operating pressure that makes single effect evaporator-single-action absorber chamber is higher than the operating pressure of double effect evaporator-economic benefits and social benefits absorber chamber, the weak solution concentration of single-action absorber is minimized (being lower than the weak solution concentration of economic benefits and social benefits absorber).Reduce the weak solution concentration that enters hot water generator and can reduce its occurrence temperature, thereby make unit energy take full advantage of the lower low-grade heat water-driven refrigerating operaton of temperature, realize UTILIZATION OF VESIDUAL HEAT IN, improve the comprehensive utilization of energy rate, economic benefit is provided.
When unit utilized separately the water-heating cooling operation, solution transfer valve, steam transfer valve, concentrated solution stop valve and weak solution stop valve were closed, and unit is by single-action kind of refrigeration cycle process flow operation.The stall of economic benefits and social benefits solution pump, the dual-effect refrigeration circulatory system and parts thereof are not worked, and double effect evaporator, economic benefits and social benefits absorber are only respectively as cold water, cooling water flow circulation passage.
During the independent combustion fuel refrigerating operaton of unit, solution transfer valve and steam transfer valve are closed, and concentrated solution stop valve and weak solution stop valve are opened, and unit is pressed the operation of direct combustion dual-effect refrigeration circulation process.The stall of single-action solution pump, hot water generator and single-action heat exchanger are not worked.Go out concentrated solution minute two-way after low temperature heat exchanger heat exchange cooling of steam generator, one the tunnel advances the economic benefits and social benefits absorber, another road enters the single-action absorber through concentrated solution cross over pipe 19, single effect evaporator, single-action absorber and double effect evaporator, economic benefits and social benefits absorber are worked together, the heat exchange area of single effect evaporator, single-action absorber is also utilized when the dual-effect refrigeration periodic duty, thus the refrigerating capacity when making the refrigerating capacity of unit when the dual-effect refrigeration periodic duty also can reach the work of single-double effect compound type kind of refrigeration cycle.This set has the novel direct-fired single-double effect compound type lithium bromide absorption type hot and cold water unit of concentrated solution cross over pipe and weak solution cross over pipe, it is lower to be mainly used in satisfying the thermal source hot water temperature, and require the refrigerating capacity of unit when not having hot water, independent combustion fuel operation also need reach the application requirements of specified refrigerating capacity, and do not need to strengthen according to specified refrigerating capacity the heat exchange area of double effect evaporator and economic benefits and social benefits absorber.
During unit combustion fuel heat supply running, solution transfer valve and steam transfer valve are opened, concentrated solution stop valve and weak solution stop valve are closed, (external heat source hot water is directly sent into the heating system heat supply without the hot water circulation in the hot water generator heat exchanger tube, or provide heat supply hot water after sending into the heat exchanger heat exchange), cryogenic fluid pump and the stall of single-action solution pump.The solution circulation flow process is: economic benefits and social benefits absorber → economic benefits and social benefits solution pump → low temperature heat exchanger → high-temperature heat exchanger → direct combustion high pressure generator → economic benefits and social benefits absorber, the high and low temperature heat exchanger is only as the weak solution circulation passage.The direct combustion high pressure generator is joined the interior lithium-bromide solution of heat heating direct combustion high pressure generator that burner combustion fuel provides, and the flue-gas temperature that combustion fuel produces goes out unit (entering atmosphere through external chimney) from smoke exhaust pipe 11 after reducing.The heat supply hot water of turnover evaporimeter only in the double effect evaporator heat exchanger tube by heat exchanger tube outside from the high temperature refrigerant vapour heat temperature raising of direct combustion high pressure generator, single effect evaporator is only as the flow of hot water circulation passage.
The cooling water flow path of single-action absorber and economic benefits and social benefits absorber can adopt parallel-connection flow (as shown in Figure 2) in the unit, also can adopt serial flow (as shown in Figure 3).When the absorber cooling water adopted serial flow, cooling water advanced from the single-action absorber, goes out from the economic benefits and social benefits absorber.Absorber cooling water serial flow unit more is applicable to the lower unit of thermal source hot water backwater temperature.
Solution transfer valve, steam transfer valve and tube connector thereof in cancellation Fig. 2, the unit shown in Figure 3, unit namely becomes the Novel flue gas hot water afterburning list dual effect type compound type lithium bromide absorption type handpiece Water Chilling Units for separate refrigeration.
Claims (8)
1. hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit, comprise Direct Fired High Pressure Generator (7), evaporimeter, absorber, steam generator (15), hot water generator (17), condenser (18), heat exchanger, solution pump and cryogenic fluid pump (35), it is characterized in that: described evaporimeter comprises single effect evaporator (27) and double effect evaporator (3), and absorber comprises single-action absorber (29) and economic benefits and social benefits absorber (4); Single effect evaporator (27) and single-action absorber (29) are arranged in the chamber, and double effect evaporator (3) and economic benefits and social benefits absorber (4) are arranged in another chamber; The cold water flow process of single effect evaporator (27) and double effect evaporator (3) adopts serial flow, and cold water advances from single effect evaporator (27), goes out from double effect evaporator (3).
2. a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit according to claim 1, it is characterized in that: be provided with concentrated solution cross over pipe (19) between economic benefits and social benefits absorber feed tube (10) and single-action absorber feed tube (21), concentrated solution cross over pipe (19) is provided with concentrated solution stop valve (20); Be provided with weak solution cross over pipe (30) between economic benefits and social benefits absorber liquid capsule and single-action absorber liquid capsule, weak solution cross over pipe (30) is provided with weak solution stop valve (33).
3. a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit according to claim 1, it is characterized in that: the heat-exchanging tube bundle of described double effect evaporator (3), economic benefits and social benefits absorber (4), single effect evaporator (27) and single-action absorber (29) four parts is arranged in the same evaporation absorber cylindrical shell (1).
4. a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit according to claim 2, it is characterized in that: the heat-exchanging tube bundle of described double effect evaporator (3), economic benefits and social benefits absorber (4), single effect evaporator (27) and single-action absorber (29) four parts is arranged in the same evaporation absorber cylindrical shell (1).
5. according to claim 1 and 2 or 3 or 4 described a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit, it is characterized in that: the heat-exchanging tube bundle of described steam generator (15), hot water generator (17) and condenser (18) three parts is the left, center, right arrangement form and is arranged in the same low condenser cylindrical shell (14) that feels cold, be provided with demarcation strip (16) in the low condenser cylindrical shell (14) that feels cold, be used for separating economic benefits and social benefits circulation solution and single-action circulation solution.
6. according to claim 1 and 2 or 3 or 4 described a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit, it is characterized in that: the pipeline between drain pipe occurred frequently (8) and economic benefits and social benefits absorber (4) is equipped with solution transfer valve (9); Pipeline between refrigerant vapour pipe (12) and double effect evaporator (3) is equipped with steam transfer valve (13).
7. it is characterized in that according to claim 1 and 2 or 3 or 4 described a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit: the cooling water flow path of single-action absorber (29) and economic benefits and social benefits absorber (4) adopts parallel-connection flow.
8. according to claim 1 and 2 or 3 or 4 described a kind of hot-water direct-fired single-double effect compound type lithium bromide absorption type refrigeration unit, it is characterized in that: the cooling water flow path of single-action absorber (29) and economic benefits and social benefits absorber (4) adopts serial flow, cooling water advances from single-action absorber (29), goes out from economic benefits and social benefits absorber (4).
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| CN2012105163167A CN102997481A (en) | 2012-12-06 | 2012-12-06 | Hot water direct-fired single-double effect composite type lithium bromide absorption refrigerating unit |
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| CN2012105163167A CN102997481A (en) | 2012-12-06 | 2012-12-06 | Hot water direct-fired single-double effect composite type lithium bromide absorption refrigerating unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110173922A (en) * | 2019-06-18 | 2019-08-27 | 双良节能系统股份有限公司 | A kind of steam type lithium bromide absorption type heat pump unit of energy dual-effect refrigeration |
| CN110173921A (en) * | 2019-06-18 | 2019-08-27 | 双良节能系统股份有限公司 | A kind of two-period form lithium bromide absorption type heat pump unit of energy dual-effect refrigeration |
| CN110542239A (en) * | 2019-09-19 | 2019-12-06 | 双良节能系统股份有限公司 | Single-double effect composite evaporation-absorption two-section direct combustion type first-class lithium bromide absorption heat pump unit |
| CN110542238A (en) * | 2019-09-19 | 2019-12-06 | 双良节能系统股份有限公司 | Single-double effect composite direct combustion type first-class lithium bromide absorption heat pump unit |
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| CN202973645U (en) * | 2012-12-06 | 2013-06-05 | 双良节能系统股份有限公司 | Hot water direct combustion single-effect and double-effect combined type lithium bromide absorption type refrigerating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110173922A (en) * | 2019-06-18 | 2019-08-27 | 双良节能系统股份有限公司 | A kind of steam type lithium bromide absorption type heat pump unit of energy dual-effect refrigeration |
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| CN110542239A (en) * | 2019-09-19 | 2019-12-06 | 双良节能系统股份有限公司 | Single-double effect composite evaporation-absorption two-section direct combustion type first-class lithium bromide absorption heat pump unit |
| CN110542238A (en) * | 2019-09-19 | 2019-12-06 | 双良节能系统股份有限公司 | Single-double effect composite direct combustion type first-class lithium bromide absorption heat pump unit |
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Application publication date: 20130327 |