CN113432333A - Variable-effect two-stage first-type lithium bromide absorption heat pump unit - Google Patents
Variable-effect two-stage first-type lithium bromide absorption heat pump unit Download PDFInfo
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- CN113432333A CN113432333A CN202110806067.4A CN202110806067A CN113432333A CN 113432333 A CN113432333 A CN 113432333A CN 202110806067 A CN202110806067 A CN 202110806067A CN 113432333 A CN113432333 A CN 113432333A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
Abstract
The invention relates to a variable-effect two-stage first-class lithium bromide absorption heat pump unit, which comprises a condenser, a second-class generator, a second-class absorber, an evaporator, a first-class absorber, a first-class generator, a first-class generating pump, a refrigerant water circulating pump, a second-class generating pump, a second-class absorption pump, a first-class low-temperature heat exchanger, a second-class heat exchanger, pipelines, valves and a control system which are used for connecting all the parts, and further comprises a first-class high-temperature heat exchanger, a single-effect condenser and a single-effect generator, wherein the solution flow of the whole unit is formed by two solution circulations; the single-effect generator, the first-stage generator, the second-stage absorber, the first-stage low-temperature heat exchanger and the first-stage high-temperature heat exchanger form a solution cycle, and the first-stage absorber, the second-stage generator and the second-stage heat exchanger form another solution cycle. The invention can realize the automatic change of heat energy between two-stage utilization and single-effect utilization when the external working condition parameter condition changes, improve the utilization rate of waste heat to the maximum extent and save energy.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a variable-effect two-stage first-class lithium bromide absorption heat pump unit.
Background
In the areas where medium-temperature hot water is needed in production process and life and there are a high-temperature heat source and a low-temperature waste heat source, a two-stage first-type lithium bromide absorption heat pump unit is often used to recover low-temperature waste heat to prepare medium-temperature hot water, as shown in fig. 1. Fig. 1 shows a two-stage first-type lithium bromide absorption heat pump unit, which mainly comprises a condenser 1, a second-stage generator 2, a second-stage absorber 3, an evaporator 4, a first-stage absorber 5, a first-stage generator 6, a first-stage generation pump 7, a refrigerant water circulating pump 8, a second-stage generation pump 9, a second-stage absorption pump 10, a first-stage heat exchanger 11, a second-stage heat exchanger 12, and pipelines, valves and a control system for connecting all the components. The solution flow of the whole unit consists of two solution circulations. The first-stage generator 6, the second-stage absorber 3 and the first-stage heat exchanger 11 form a solution circulation; the first absorber 5, the second generator 2 and the second heat exchanger 12 form another solution circulation. In the first path of solution circulation, dilute solution at the bottom of the secondary absorber 3 is lifted by the primary generation pump 7, enters the primary generator 6 after being subjected to heat exchange and temperature rise through the primary heat exchanger 11, is heated by a high-temperature heat source in the pipe to generate refrigerant steam, is changed into concentrated solution, is conveyed by the secondary absorption pump 10, is subjected to heat exchange and temperature reduction through the primary heat exchanger 11, enters the secondary absorber 3, absorbs the refrigerant steam generated by the evaporator 4 and then is changed into dilute solution, and the absorption heat generated in the absorption process is medium-temperature hot water in the heating pipe. The refrigerant vapor generated by the primary generator 6 is absorbed by the primary absorber 5. In another solution circulation, the concentrated solution is changed into a dilute solution after absorbing the refrigerant steam generated by the primary generator 6 in the primary absorber 5, and the absorption heat generated in the absorption process heats the warm water in the pipe. The dilute solution is lifted by a secondary generation pump 9, enters a secondary generator 2 after being subjected to heat exchange and temperature rise through a secondary heat exchanger 12, is heated by a high-temperature heat source in the pipe to generate refrigerant steam, flows into the secondary heat exchanger 12 by virtue of pressure difference and height difference after being changed into the concentrated solution, is subjected to heat exchange and temperature reduction, enters a primary absorber 5, and continuously absorbs the refrigerant steam generated by the primary generator 6 to become the dilute solution. The refrigerant steam generated by the secondary generator 2 enters the condenser 1 to be condensed into refrigerant water, and the condensation heat generated in the condensation process heats the medium-temperature hot water in the pipe. The refrigerant water enters the evaporator 4 after throttling, is sprayed on the surface of the tube of the evaporator 4 by the refrigerant water circulating pump 8, is heated and evaporated by the low-temperature heat source in the tube, and the generated refrigerant steam is absorbed by the secondary absorber 3.
The cop of the two-stage first-type lithium bromide absorption heat pump unit can reach about 1.4, about 40% of energy consumption can be saved, comprehensive utilization of energy is realized, a large amount of applications are obtained in recent years, and better economic and social benefits are obtained.
However, in practical applications, when the peripheral parameter conditions of the user become good, such as the temperature of the high-temperature heat source and the low-temperature waste heat source increases and the temperature of the required medium-temperature hot water decreases, the waste heat conversion efficiency cannot be correspondingly improved because the unit structure is fixed. How to solve the above problems, that is, when the peripheral conditions become better, the cop of the heat pump unit can be correspondingly and significantly improved, the energy-saving efficiency can be improved to the maximum extent, the waste heat is recovered more, and the energy is saved, which becomes one of the important subjects of the current research.
Disclosure of Invention
The invention aims to overcome the defects and provides a variable-efficiency two-stage first-class lithium bromide absorption heat pump unit which can realize automatic variable efficiency of heat energy between two-stage utilization and single-effect utilization when external working condition parameters and conditions are changed, improve the utilization rate of waste heat to the greatest extent and save energy.
The purpose of the invention is realized as follows:
a variable-effect two-stage first-class lithium bromide absorption heat pump unit comprises a condenser, a second-stage generator, a second-stage absorber, an evaporator, a first-stage absorber, a first-stage generator, a first-stage generating pump, a refrigerant water circulating pump, a second-stage generating pump, a second-stage absorbing pump, a first-stage low-temperature heat exchanger, a second-stage heat exchanger, pipelines, valves and a control system, wherein the pipelines, the valves and the control system are connected among all the parts;
in the solution circulation, dilute solution firstly enters the single-effect generator for generation, part of energy is utilized in a single-effect mode, and then enters the first-stage generator for two-stage utilization of the energy;
the first absorber, the second generator and the second heat exchanger form another solution circulation.
Preferably, in a solution cycle, dilute solution at the bottom of the secondary absorber is lifted by the primary generation pump, passes through the primary low-temperature heat exchanger and the primary high-temperature heat exchanger for heat exchange and temperature rise, enters the single-effect generator for generating refrigerant steam to become intermediate solution, then flows into the primary high-temperature heat exchanger by virtue of pressure difference and height difference, enters the primary generator for generating refrigerant steam again after heat exchange and temperature reduction, is conveyed by the secondary absorption pump after being converted into concentrated solution and enters the secondary absorber after being subjected to heat exchange and temperature reduction by virtue of the primary low-temperature heat exchanger, is converted into dilute solution after absorbing the refrigerant steam generated outside the evaporator tube, and heats intermediate-temperature hot water in the tube by absorption heat generated in the absorption process.
Preferably, the refrigerant steam generated by the single-effect generator is condensed into refrigerant water in the single-effect condenser, the condensation heat generated in the condensation process heats medium-temperature hot water in the pipe, and the refrigerant water flows back to the evaporator through the throttle.
Preferably, in another solution circulation, the concentrated solution is changed into a dilute solution after absorbing the cryogen steam generated by the first-stage generator in the first-stage absorber, the absorption heat generated in the absorption process heats the medium-temperature hot water in the pipe, the dilute solution is lifted by the second-stage generation pump, enters the second-stage generator after being subjected to heat exchange and temperature rise through the second-stage heat exchanger to generate the cryogen steam, is changed into the concentrated solution, then flows into the second-stage heat exchanger by virtue of pressure difference and height difference, is subjected to heat exchange and temperature reduction, enters the first-stage absorber, and continuously absorbs the cryogen steam generated by the first-.
Preferably, the refrigerant steam generated by the secondary generator enters the condenser to be condensed into refrigerant water, the condensation heat generated in the condensation process heats medium-temperature hot water in the pipe, and the refrigerant water also enters the evaporator after throttling.
Preferably, the two paths of refrigerant water are collected at the bottom of the evaporator, sprayed on the surface of the evaporator tube by the refrigerant water circulating pump, heated and evaporated by the low-temperature heat source in the tube, and the generated refrigerant steam is absorbed by the secondary absorber.
Preferably, the high-temperature heat source enters the single-effect generator, the primary generator and the secondary generator, and the solution outside the heating pipe is concentrated to generate refrigerant steam; the low-temperature heat source flows in the evaporator tube and heats the refrigerant water outside the tube to evaporate the refrigerant water; the medium temperature hot water flows in the first-stage absorber, the second-stage absorber, the single-effect condenser and the condenser pipe, and absorbs the heat of absorption and condensation of the solution outside the pipes.
Preferably, the high-temperature heat sources are connected in series or in parallel or in series and parallel or in parallel and in any sequence to the single-effect generator, the primary generator and the secondary generator.
Preferably, the medium-temperature hot water enters the secondary absorber, the primary absorber, the single-effect condenser and the condenser in any sequence in series or in parallel or in series and parallel or in parallel.
Preferably, the high-temperature heat source and the low-temperature heat source are water, heat conduction oil, steam or other heat conduction media.
The invention has the beneficial effects that:
the invention can realize variable-efficiency operation: in the operation process, when the peripheral working condition is poor, the energy utilization of the unit is a two-stage heat pump type, when the peripheral working condition is good, the energy utilization of the unit can partially realize the operation of a single-effect heat pump type, and compared with the two-stage heat pump type, the efficiency of the single-effect heat pump type is 25 percent higher than that of the two-stage heat pump type; therefore, the invention can improve the medium temperature hot water to a greater extent, and can also improve the unit efficiency and the comprehensive energy utilization rate to the maximum extent through automatic efficiency change.
Drawings
Fig. 1 is a schematic structural view of a conventional two-stage type first-type lithium bromide absorption heat pump unit.
Fig. 2 is a schematic structural diagram of a variable-efficiency two-stage type first-type lithium bromide absorption heat pump unit according to the present invention.
Wherein: the system comprises a condenser 1, a secondary generator 2, a secondary absorber 3, an evaporator 4, a primary absorber 5, a primary generator 6, a primary generating pump 7, a refrigerant water circulating pump 8, a secondary generating pump 9, a secondary absorbing pump 10, a primary low-temperature heat exchanger 11, a secondary heat exchanger 12, a primary high-temperature heat exchanger 13, a single-effect condenser 14, a single-effect generator 15, a high-temperature heat source inlet A1, a high-temperature heat source outlet A2, a low-temperature heat source inlet B1, a low-temperature heat source outlet B2, medium-temperature hot water inlet C1 and medium-temperature hot water outlet C2.
Detailed Description
Referring to fig. 2, the invention relates to a variable-effect two-stage first-class lithium bromide absorption heat pump unit, which comprises a condenser 1, a second-class generator 2, a second-class absorber 3, an evaporator 4, a first-class absorber 5, a first-class generator 6, a first-class generation pump 7, a refrigerant water circulating pump 8, a second-class generation pump 9, a second-class absorption pump 10, a first-class low-temperature heat exchanger 11, a second-class heat exchanger 12, a first-class high-temperature heat exchanger 13, a single-effect condenser 14, a single-effect generator 15, and pipelines, valves and a control system which are connected among all the components, wherein the solution flow of the whole unit is formed by two. The single-effect generator 15, the first-stage generator 6, the second-stage absorber 3, the first-stage low-temperature heat exchanger 11 and the first-stage high-temperature heat exchanger 13 form a solution circulation; the first absorber 5, the second generator 2 and the second heat exchanger 12 form another solution circulation. In the first solution circulation, the dilute solution firstly enters the single-effect generator 15 for generation, so that single-effect utilization of part of energy is realized, and then enters the first-stage generator 6 for realizing two-stage utilization of the energy. Due to the addition of the single-effect generator 15 and the single-effect condenser 14, when the peripheral working condition becomes better, the proportion of energy sources for realizing the operation of the single-effect heat pump is increased, so that the utilization efficiency of the energy sources is improved; when the working condition is poor, the proportion of the energy for realizing the operation of the single-effect heat pump is reduced, and the proportion of the energy for realizing the operation of the two-stage heat pump is increased, so that the effect change is realized.
The high-temperature heat source enters the single-effect generator 15, the first-stage generator 6 and the second-stage generator 2, and the solution outside the pipe is heated to be concentrated and generate refrigerant steam; the low-temperature heat source flows in the evaporator 4 pipe and heats the refrigerant water outside the pipe to evaporate; the medium temperature hot water flows in the first-stage absorber 5, the second-stage absorber 3, the single-effect condenser 14 and the condenser 1, and absorbs the heat of absorption and condensation of the solution outside the tubes, so that the temperature of the medium temperature hot water is raised.
In the first solution circulation, the dilute solution at the bottom of the second-stage absorber 3 is lifted by the first-stage generation pump 7, passes through the first-stage low-temperature heat exchanger 11 and the first-stage high-temperature heat exchanger 13 for heat exchange and temperature rise, then enters the single-effect generator 15 for generating refrigerant steam to become intermediate solution, then flows into the first-stage high-temperature heat exchanger 13 by means of pressure difference and height difference, enters the first-stage generator 6 for generating refrigerant steam again after heat exchange and temperature reduction, enters the second-stage absorber 3 after being conveyed by the second-stage absorption pump 10 for heat exchange and temperature reduction, absorbs the refrigerant steam generated outside the evaporator 4 and then becomes dilute solution, and the absorption heat generated in the absorption process heats medium-temperature hot water in the pipe. The refrigerant steam generated by the single-effect generator 15 is condensed into refrigerant water in the single-effect condenser 14, the condensation heat generated in the condensation process heats the medium-temperature hot water in the pipe, and the refrigerant water flows back to the evaporator 4 through the throttle. The refrigerant vapor generated by the primary generator 6 is absorbed by the primary absorber 5.
In another solution circulation, the concentrated solution is changed into a dilute solution after absorbing the refrigerant steam generated by the primary generator 6 in the primary absorber 5, and the absorption heat generated in the absorption process heats the warm water in the pipe. The dilute solution is lifted by the secondary generation pump 9, enters the secondary generator 2 after being subjected to heat exchange and temperature rise through the secondary heat exchanger 12 to generate refrigerant steam, is changed into a concentrated solution, then flows into the secondary heat exchanger 12 by virtue of pressure difference and height difference, is subjected to heat exchange and temperature reduction, enters the primary absorber 5, and continuously absorbs the refrigerant steam generated by the primary generator 6 to be changed into the dilute solution. The refrigerant steam generated by the secondary generator 2 enters the condenser 1 to be condensed into refrigerant water, and the condensation heat generated in the condensation process heats the medium-temperature hot water in the pipe. The refrigerant water enters the evaporator 4 after being throttled, the two paths of refrigerant water are converged at the bottom of the evaporator 4, are sprayed on the surface of the tube of the evaporator 4 by the refrigerant water circulating pump 8 and are heated and evaporated by the low-temperature heat source in the tube, and the generated refrigerant steam is absorbed by the secondary absorber 3.
The high-temperature heat source enters the single-effect generator 15, the primary generator 6 and the secondary generator 2 (3 components are not in sequence), and the modes of series connection, parallel connection, series-parallel connection, parallel-series connection and the like can be adopted; the medium temperature hot water enters a secondary absorber 3, a primary absorber 5, a single-effect condenser 14 and a condenser 1 (4 parts are not in sequence), and the modes of series connection, parallel connection, series-parallel connection, parallel-series connection and the like can be adopted. Various combinations can be formed according to the various high-temperature heat source flow ways and the various medium-temperature hot water flow ways.
The high temperature heat source and the low temperature heat source can be water, heat conducting oil, steam or other heat sources.
The medium temperature hot water output to the user can be water or other media.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a first type lithium bromide absorption heat pump unit of variable effect two-stage type, it includes condenser (1), second grade generator (2), second grade absorber (3), evaporimeter (4), one-level absorber (5), one-level generator (6), one-level generating pump (7), refrigerant water circulating pump (8), second grade generating pump (9), second grade absorbing pump (10), one-level low temperature heat exchanger (11), second grade heat exchanger (12) and connect pipeline, valve and control system between each part, its characterized in that:
the system also comprises a first-stage high-temperature heat exchanger (13), a single-effect condenser (14) and a single-effect generator (15), wherein the solution flow of the whole unit consists of two solution circulations;
in the solution circulation, dilute solution firstly enters the single-effect generator (15) to be generated, part of energy is utilized in a single-effect mode, and then enters the first-stage generator (6) to be utilized in a two-stage mode;
the first-stage absorber (5), the second-stage generator (2) and the second-stage heat exchanger (12) form another solution circulation.
2. The variable-efficiency two-stage type first-class lithium bromide absorption heat pump unit according to claim 1, wherein: in a solution circulation, dilute solution at the bottom of a secondary absorber (3) is lifted by a primary generation pump (7) and passes through a primary low-temperature heat exchanger (11), the primary high-temperature heat exchanger (13) exchanges heat and is heated, then the dilute solution enters a single-effect generator (15) to generate refrigerant steam, becomes intermediate solution, then flows into the primary high-temperature heat exchanger (13) by means of pressure difference and height difference, enters a primary generator (6) to generate refrigerant steam again after heat exchange and cooling, the dilute solution is conveyed by a secondary absorption pump (10) to exchange heat and cool by the primary low-temperature heat exchanger (11) and enters the secondary absorber (3), the refrigerant steam generated outside an evaporator (4) is absorbed and then becomes dilute solution, and absorption heat generated in the absorption process heats medium-temperature hot water in a heating pipe.
3. The variable-efficiency two-stage type first-class lithium bromide absorption heat pump unit according to claim 2, wherein: the refrigerant steam generated by the single-effect generator (15) is condensed into refrigerant water in the single-effect condenser (14), the condensation heat generated in the condensation process heats medium-temperature hot water in the pipe, and the refrigerant water flows back to the evaporator (4) through throttling.
4. A variable-efficiency two-stage type first-class lithium bromide absorption heat pump unit according to claim 3, wherein: in another solution circulation, the concentrated solution is changed into dilute solution after absorbing the cryogen steam generated by the first-stage generator (6) in the first-stage absorber (5), the absorption heat generated in the absorption process heats the medium-temperature hot water in the pipe, the dilute solution is lifted by the second-stage generating pump (9) and enters the second-stage generator (2) to generate the cryogen steam after being subjected to heat exchange and temperature rise through the second-stage heat exchanger (12), the cryogen steam is changed into the concentrated solution and then flows into the second-stage heat exchanger (12) by means of pressure difference and height difference, the heat exchange and temperature fall enters the first-stage absorber (5), and the cryogen steam generated by the first-stage generator (6) is continuously absorbed to be changed into the dilute solution.
5. The variable-efficiency two-stage type first-class lithium bromide absorption heat pump unit according to claim 4, wherein: the refrigerant steam generated by the secondary generator (2) enters the condenser (1) to be condensed into refrigerant water, the condensation heat generated in the condensation process heats the medium-temperature hot water in the pipe, and the refrigerant water also enters the evaporator (4) after throttling.
6. The variable-efficiency two-stage type first-class lithium bromide absorption heat pump unit according to claim 5, wherein: the two paths of refrigerant water are collected at the bottom of the evaporator (4), sprayed on the surface of the evaporator (4) by a refrigerant water circulating pump (8) and heated and evaporated by a low-temperature heat source in the evaporator, and the generated refrigerant steam is absorbed by the secondary absorber (3).
7. The variable-efficiency two-stage type first-class lithium bromide absorption heat pump unit according to claim 1, wherein: the high-temperature heat sources are connected in series or in parallel or in series and parallel in any order and enter the single-effect generator (15), the primary generator (6) and the secondary generator (2), and the solution outside the tubes is heated to be concentrated and generate refrigerant steam; the low-temperature heat source flows in the evaporator (4) pipe and heats the refrigerant water outside the pipe to evaporate; the medium-temperature hot water enters the first-stage absorber (5), the second-stage absorber (3), the single-effect condenser (14) and the condenser (1) in series or in parallel or in series and parallel in any sequence, and absorbs the heat of absorption and condensation of the solution outside the tubes.
8. The variable-efficiency two-stage type first-class lithium bromide absorption heat pump unit according to claim 7, wherein: the high temperature heat source and the low temperature heat source are water or heat conducting oil or steam or other heat conducting media.
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| CN202110806067.4A CN113432333A (en) | 2021-07-16 | 2021-07-16 | Variable-effect two-stage first-type lithium bromide absorption heat pump unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251864A (en) * | 2021-12-28 | 2022-03-29 | 北京华源泰盟节能设备有限公司 | Absorption refrigerator |
| CN114322357A (en) * | 2021-12-29 | 2022-04-12 | 北京华源泰盟节能设备有限公司 | Two-stage natural circulation steam production heating type heat pump unit |
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- 2021-07-16 CN CN202110806067.4A patent/CN113432333A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251864A (en) * | 2021-12-28 | 2022-03-29 | 北京华源泰盟节能设备有限公司 | Absorption refrigerator |
| CN114251864B (en) * | 2021-12-28 | 2023-09-29 | 北京华源泰盟节能设备有限公司 | Absorption refrigerator |
| CN114322357A (en) * | 2021-12-29 | 2022-04-12 | 北京华源泰盟节能设备有限公司 | Two-stage natural circulation steam production heating type heat pump unit |
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