CN112283981B - Evaporation type absorber and absorption type refrigerating system thereof - Google Patents
Evaporation type absorber and absorption type refrigerating system thereof Download PDFInfo
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- CN112283981B CN112283981B CN202011072727.2A CN202011072727A CN112283981B CN 112283981 B CN112283981 B CN 112283981B CN 202011072727 A CN202011072727 A CN 202011072727A CN 112283981 B CN112283981 B CN 112283981B
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- side wall
- partition plate
- heat exchange
- absorber
- shell
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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
- F25B37/00—Absorbers; Adsorbers
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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
- F25B15/04—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being ammonia evaporated from aqueous solution
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses an evaporative absorber in the technical field of absorption type circulation, which comprises a synergistic device and a plurality of absorbers, wherein the side wall of the synergistic device is connected with the absorbers, the outer sides of the absorbers are provided with shells, the bottom wall of the shell is connected with a water outlet in a penetrating way, the water outlet is connected with a circulating pipe in a penetrating way, the circulating pipe is connected with a water inlet in a penetrating way, the water inlet is arranged on the side wall of the shell, the circulating pump is arranged on the circulating pipe, the device is used for replacing the absorbers and cooling towers in the existing absorption type refrigerating system, the equipment is saved, the integration degree of the device is improved, meanwhile, the indirect heat exchange of the original circulating water is saved, the circulating power required by the circulating water is greatly reduced, so that a poor solution flows from the upper part to the lower part under the action of gravity, a gaseous refrigerant rises from the lower part to the upper part, and then the corrugated side wall structure of a heat exchange device is combined, slowing down the downward flow rate of the lean solution, increasing the absorption time and improving the absorption effect.
Description
Technical Field
The invention relates to the technical field of absorption type circulation, in particular to an evaporative absorber and an absorption type refrigerating system thereof.
Background
The waste heat refrigeration is a technology for driving a compression type or absorption type refrigerator to refrigerate by using gas or waste gas and waste liquid in the production process and heat exhausted by some power machines as energy sources. Waste heat refrigeration can help people to recover waste heat, energy consumption is saved, and cost is reduced.
Conventional compression refrigeration is a conversion process of electrical energy. The compressor sucks the low-pressure and low-temperature refrigerant gas (such as Freon) generated in the evaporator into the cylinder, and compresses the refrigerant gas into gas with higher pressure and temperature, and the gas is discharged into the condenser. Condensing into liquid, throttling and reducing pressure by a pressure regulating valve, and then entering the evaporator, wherein the low-pressure refrigerant gas is vaporized to absorb heat in the evaporator to reduce the temperature. This is the chilled water of the air conditioner that we need. The compression process requires a large consumption of electrical energy.
In order to save energy, the publication CN201721774033.7 discloses an industrial waste heat driven absorption type deep refrigeration system, in which industrial waste heat can be effectively utilized to achieve energy recycling. However, as is well known, a cooling tower is generally arranged in a device matched with the system for use, when cooling water in a traditional absorber is used, a circulating pump is needed for driving and circulating, a certain amount of electric quantity loss can be generated, and when heat is exchanged, the cooling water is needed to take away heat firstly, and then the cooling tower is used for cooling, so that the heat exchange stroke is long, and the heat exchange efficiency is reduced. In order to solve the problems, the application combines the new process design of the prior art to provide an absorber and an absorption refrigeration system thereof.
Disclosure of Invention
The present invention is directed to an absorber and an absorption refrigeration system thereof, which solve the problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: an evaporative absorber comprises a synergistic device and a plurality of absorbers, wherein the side wall of the synergistic device is connected with the absorbers, a plurality of absorbers are provided with outer shells on the outer sides, the bottom wall of each outer shell is connected with a water outlet in a through mode, the water outlet is connected with a circulating pipe in a through mode, the circulating pipe is connected with a water inlet in a through mode, the water inlet is arranged on the side wall of each outer shell, a circulating pump is arranged on the circulating pipe, and the side wall of each outer shell is provided with a feeding hole, an air inlet and a discharging hole.
Preferably, the efficiency-increasing device comprises an installation shell, the inner side wall of the installation shell is fixedly connected with a water collector and a filler, the inner side wall of the installation shell is fixedly connected with a fixing device, the fixing device is fixedly connected with a motor, and the side wall of the output end of the motor is fixedly connected with fan blades.
Preferably, the absorber includes first baffle, one side of first baffle and the inside wall fixed connection of shell, another lateral wall of first baffle and the outside wall fixed connection of installation shell, fixedly connected with second baffle and third baffle between the inside wall of shell and the outside wall of installation shell, the first stationary liquid ring of fixedly connected with on the first baffle, the stationary liquid ring of fixedly connected with second on the second baffle, it has a plurality of sleeves to fix the grafting on the second baffle, it has a plurality of heat transfer device to fix the grafting on the first baffle, heat transfer device passes sleeve and telescopic inside wall contact, set up the jack that corresponds with heat transfer device on the third baffle, heat transfer device's lower extreme is fixed to run through the fourth baffle, the fourth baffle is installed between shell and installation shell.
Preferably, the lower opening of the sleeve is of an annular chamfered edge structure.
Preferably, the feed inlet is positioned between the first partition plate and the second partition plate, and the air inlet and the discharge outlet are positioned between the third partition plate and the fourth partition plate.
Preferably, the heat exchange device is a heat exchange tube, and the side wall of the heat exchange tube is corrugated.
Preferably, the first liquid stabilizing ring and the second liquid stabilizing ring are both of hollow cylindrical structures, an inner liquid distributor is installed at the top end of the corrugated heat exchange tube, and a liquid level meter is installed between the air inlet and the discharge hole.
Compared with the prior art, the invention has the beneficial effects that:
1. through setting up synergistic device, shell and absorber isotructure, utilize absorber and cooling tower among this device replacement current absorption refrigeration system, save equipment, promoted the integrated level of device, saved former indirect heat transfer of circulating water simultaneously, greatly reduced the circulation power that the circulating water needs.
2. Through setting up structures such as heat transfer device, feed inlet and air inlet for poor solution flows to the below from the top under the action of gravity, and gaseous state refrigerant rises to the top from the below, combines the corrugated lateral wall structure of heat transfer device again, slows down the decurrent velocity of flow of poor solution, increases the absorption time, has promoted the absorption effect.
3. Through setting up first steady liquid ring, circulating pump and circulating pipe isotructure for water and air can be even flow down simultaneously in a plurality of heat transfer devices, have promoted the stability of heat transfer.
4. Through combining synergistic device and absorber, can utilize air and water of inspiration to carry out synchronous heat transfer through heat transfer device and poor solution, promoted heat exchange efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is an enlarged view of the structure A of the present invention;
FIG. 3 is a schematic diagram of the system architecture and process of the present invention;
FIG. 4 is a schematic view of the internal liquid distributor mounting structure of the present invention;
FIG. 5 is a schematic top view of the internal liquid distributor of the present invention;
fig. 6 is a schematic structural view of a corrugated heat exchange tube according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the device comprises a synergistic device-1, an installation shell-11, a water collector-12, a filler-13, a fixing device-14, a motor-15, fan blades-16, a shell-2, an absorber-3, a first partition plate-31, a first liquid stabilizing ring-32, a heat exchange device-33, a second partition plate-34, a second liquid stabilizing ring-35, a sleeve-36, a third partition plate-37, a fourth partition plate-38, a water outlet-4, a circulating pump-5, a circulating pipe-6, a feed inlet-7, a water inlet-8, an air inlet-9, a discharge outlet-10 and an inner liquid distributing device-21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides an evaporative absorber, including increase device 1 and a plurality of absorber 3, the lateral wall and the absorber 3 of increase device 1 are connected, shell 2 is installed in a plurality of absorber 3's the outside, the diapire through connection of shell 2 has delivery port 4, delivery port 4 through connection has circulating pipe 6, circulating pipe 6 through connection has 8 water inlets 8 and installs on the lateral wall of shell 2, install circulating pump 5 on the circulating pipe 6, the lateral wall of shell 2 is provided with feed inlet 7, air inlet 9 and discharge gate 10, utilize absorber and cooling tower among the present absorption refrigeration system of this device replacement, save equipment, the integrated level of device has been promoted, the indirect heat transfer of former circulating water has been saved simultaneously, the circulation power that the circulating water needs has greatly been reduced.
The absorber 3 comprises a first clapboard 31, one side of the first clapboard 31 is fixedly connected with the inner side wall of the shell 2, the other side wall of the first clapboard 31 is fixedly connected with the outer side wall of the installation shell 11, a second clapboard 34 and a third clapboard 37 are fixedly connected between the inner side wall of the shell 2 and the outer side wall of the installation shell 11, a first liquid stabilizing ring 32 is fixedly connected on the first clapboard 31, a second liquid stabilizing ring 35 is fixedly connected on the second clapboard 34, a plurality of sleeves 36 are fixedly inserted on the second clapboard 34, a plurality of heat exchange devices 33 are fixedly inserted on the first clapboard 31, the heat exchange devices 33 pass through the sleeves 36 and contact with the inner side wall of the sleeves 36, jacks corresponding to the heat exchange devices 33 are arranged on the third clapboard 37, the lower end of the heat exchange device 33 fixedly penetrates through a fourth clapboard 38, the fourth clapboard 38 is installed between the shell 2 and the installation shell 11, the structure enables water and air to uniformly flow down from the plurality of heat exchange devices 33 simultaneously, the stability of heat transfer has been promoted.
The lower end opening part of the sleeve 36 is of an annular chamfered edge structure, the feed inlet 7 is located between the first partition plate 31 and the second partition plate 34, the air inlet 9 and the discharge outlet 10 are located between the third partition plate 37 and the fourth partition plate 38, the heat exchange device 33 is a heat exchange tube, the side wall of the heat exchange tube is of a corrugated shape, the first liquid stabilizing ring 32 and the second liquid stabilizing ring 35 are both of hollow cylindrical structures, the inner liquid distributor 21 is installed at the top end of the corrugated heat exchange tube, the liquid level meter is installed between the air inlet 9 and the discharge outlet 10, the structure can utilize sucked air and water to synchronously exchange heat with lean solution through the heat exchange device 33, and the heat exchange efficiency is improved.
An absorption refrigeration system comprising a generator, a condenser, an evaporator, a pressure reducing valve, a circulation pump, a throttle valve, and further comprising an absorber according to any one of claims 1 to 7, wherein a lean solution line and a rich solution line are connected between the absorber and the generator, a high-pressure gaseous refrigerant line is connected between the generator and the condenser, a high-pressure liquid refrigerant line is connected between the condenser and the evaporator, and a low-pressure gaseous refrigerant line is connected between the evaporator and the absorber. The lean solution pipeline is provided with a throttle valve, the rich solution pipeline is provided with a circulating pump, and the high-pressure liquid refrigerant pipeline is provided with a pressure reducing valve. The poor solution pipeline is communicated with the feed inlet 7, the rich solution pipeline is communicated with the discharge outlet 10, and the low-pressure gaseous refrigerant pipeline is communicated with the air inlet 9.
With the combination of the embodiment, the operation flow of the process is as follows: referring to fig. 1 and 3, the process combines a cooling tower and an absorber to reduce the circulation of cooling water and the operation of a water pump, wherein the lean solution and the rich solution can be a lean ammonia solution and a rich ammonia solution, and the gaseous refrigerant is ammonia gas.
When the device is operated, the circulating pump 5 and the motor 15 in the synergistic device 1 are started simultaneously, when the circulating pump 5 is operated, cooling water can circularly flow along the heat exchange device 33, the water outlet 4 and the circulating pipe 6, when the motor 15 is operated, outside air is pumped into the heat exchange device 33 from the upper part of the heat exchange device 33, in the process, the ammonia poor solution from the generator and the ammonia gas from the evaporator are simultaneously introduced into the system, the ammonia gas rises along the outer side wall of the heat exchange device 33 after passing through the jack, the ammonia poor solution gradually overflows the second liquid stabilizing ring 35 after being introduced, then flows down from gaps between the plurality of sleeves 36 and the outer side wall of the heat exchange device 33, in the process, the ammonia poor solution exchanges heat with water flow and air flowing through the inner part through the heat exchange device 33, then absorbs the ammonia gas to become an ammonia rich solution, and flows out through the material outlet 10, in the process, the water flow and the air directly exchange heat with the ammonia poor solution through the heat exchange device 33, cooling water and a water pump are not needed any more, and the heat exchange stroke is shortened.
The rich ammonia solution that flows out gets into the system, is thrown into the generator by the circulating pump, decomposes into ammonia and poor ammonia solution under the effect of heat source, and the ammonia gets into the condenser, and poor ammonia solution gets into this device through the throttle valve once more and circulates, and the ammonia through the condenser gets into the evaporimeter after being decompressed by the relief pressure valve, then gets into this device once more and circulates, accomplishes the process of whole circulation.
In this process, first stationary liquid ring 32 and second stationary liquid ring 35 can ensure the uniformity of water and poor solution when getting into a plurality of heat transfer device 33 and carrying out the heat transfer, and heat transfer device 33's ripple type lateral wall can slow down the poor ammonia solution velocity of flow, improves the heat transfer effect.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. An evaporative absorber comprising an enhancement means (1) and a plurality of absorbers (3), characterised in that: the side wall of the synergistic device (1) is connected with the absorber (3), the outer shell (2) is installed on the outer side of the absorbers (3), the bottom wall of the outer shell (2) is connected with the water outlet (4) in a penetrating manner, the water outlet (4) is connected with the circulating pipe (6) in a penetrating manner, the circulating pipe (6) is connected with the water inlet (8) in a penetrating manner, the water inlet (8) is installed on the side wall of the outer shell (2), the circulating pipe (6) is provided with the circulating pump (5), the side wall of the outer shell (2) is provided with the feed inlet (7), the air inlet (9) and the discharge outlet (10), the synergistic device (1) comprises an installation shell (11), the inner side wall of the installation shell (11) is fixedly connected with the water collector (12) and the filler (13), the inner side wall of the installation shell (11) is fixedly connected with the fixing device (14), and the fixing device (14) is fixedly connected with the motor (15), the fan blade is characterized in that the fan blade (16) is fixedly connected to the side wall of the output end of the motor (15), the absorber (3) comprises a first partition plate (31), one side of the first partition plate (31) is fixedly connected with the inner side wall of the shell (2), the other side wall of the first partition plate (31) is fixedly connected with the outer side wall of the installation shell (11), a second partition plate (34) and a third partition plate (37) are fixedly connected between the inner side wall of the shell (2) and the outer side wall of the installation shell (11), a first liquid stabilizing ring (32) is fixedly connected to the first partition plate (31), a second liquid stabilizing ring (35) is fixedly connected to the second partition plate (34), a plurality of sleeves (36) are fixedly inserted to the second partition plate (34), a plurality of heat exchange devices (33) are fixedly inserted to the first partition plate (31), and the heat exchange devices (33) penetrate through the sleeves (36) and are not contacted with the inner side wall of the sleeves (36), the third partition plate (37) is provided with a jack corresponding to the heat exchange device (33), the lower end of the heat exchange device (33) fixedly penetrates through the fourth partition plate (38), the fourth partition plate (38) is installed between the shell (2) and the installation shell (11), the opening at the lower end of the sleeve (36) is of an annular chamfered edge structure, and the incision direction of the annular chamfered edge structure is an inward contraction type incision.
2. An evaporative absorber as claimed in claim 1, wherein: the feed inlet (7) is positioned between the first partition plate (31) and the second partition plate (34), and the air inlet (9) and the discharge outlet (10) are positioned between the third partition plate (37) and the fourth partition plate (38).
3. An evaporative absorber as claimed in claim 2, wherein: the heat exchange device (33) is a heat exchange tube, and the side wall of the heat exchange tube is corrugated.
4. An evaporative absorber as claimed in claim 3, wherein: first steady liquid ring (32) and second steady liquid ring (35) are the cavity cylinder structure, interior spreader (21) are installed on the top of corrugated heat exchange tube, install the level gauge between air inlet (9) and discharge gate (10).
5. The utility model provides an absorption refrigeration system, includes generator, condenser, evaporimeter, relief pressure valve, circulating pump, choke valve, its characterized in that: the evaporative absorber according to any one of claims 1 to 4, further comprising a lean solution line and a rich solution line connected between the absorber and the generator, a high pressure gaseous refrigerant line connected between the generator and the condenser, a high pressure liquid refrigerant line connected between the condenser and the evaporator, and a low pressure gaseous refrigerant line connected between the evaporator and the absorber.
6. An absorption refrigeration system according to claim 5 wherein: the lean solution pipeline is provided with a throttling valve, the rich solution pipeline is provided with a circulating pump, and the high-pressure liquid refrigerant pipeline is provided with a pressure reducing valve.
7. An absorption refrigeration system according to claim 6 wherein: the poor solution pipeline is communicated with the feeding hole (7), the rich solution pipeline is communicated with the discharging hole (10), and the low-pressure gaseous refrigerant pipeline is communicated with the air inlet (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011072727.2A CN112283981B (en) | 2020-10-09 | 2020-10-09 | Evaporation type absorber and absorption type refrigerating system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011072727.2A CN112283981B (en) | 2020-10-09 | 2020-10-09 | Evaporation type absorber and absorption type refrigerating system thereof |
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| CN112283981A CN112283981A (en) | 2021-01-29 |
| CN112283981B true CN112283981B (en) | 2021-11-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN215798535U (en) * | 2021-07-27 | 2022-02-11 | 安徽普泛能源技术有限公司 | Soda production line combined with low-grade waste heat absorption type refrigerating system |
| CN113587486B (en) * | 2021-08-10 | 2022-10-21 | 安徽普泛能源技术有限公司 | Absorption type refrigerating system |
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| JPS6453863U (en) * | 1987-09-28 | 1989-04-03 | ||
| JP2004270967A (en) * | 2003-03-05 | 2004-09-30 | Ishikawajima Harima Heavy Ind Co Ltd | Absorption type refrigerator |
| CN1865813A (en) * | 2006-05-10 | 2006-11-22 | 江苏双良空调设备股份有限公司 | Second lithium bromide absorption type heat pump for preparing steam by using vertical double-side falling-film absorber |
| CN201152648Y (en) * | 2008-01-18 | 2008-11-19 | 徐阳 | Falling film evaporative cooling refrigeration set |
| CN103423912A (en) * | 2013-07-23 | 2013-12-04 | 华中科技大学 | Small air-cooled absorption type refrigerating machine |
| CN108592444A (en) * | 2018-02-06 | 2018-09-28 | 华北电力大学 | A kind of electric heat pump and the compound heat-exchange unit of absorption heat pump |
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2020
- 2020-10-09 CN CN202011072727.2A patent/CN112283981B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6453863U (en) * | 1987-09-28 | 1989-04-03 | ||
| JP2004270967A (en) * | 2003-03-05 | 2004-09-30 | Ishikawajima Harima Heavy Ind Co Ltd | Absorption type refrigerator |
| CN1865813A (en) * | 2006-05-10 | 2006-11-22 | 江苏双良空调设备股份有限公司 | Second lithium bromide absorption type heat pump for preparing steam by using vertical double-side falling-film absorber |
| CN201152648Y (en) * | 2008-01-18 | 2008-11-19 | 徐阳 | Falling film evaporative cooling refrigeration set |
| CN103423912A (en) * | 2013-07-23 | 2013-12-04 | 华中科技大学 | Small air-cooled absorption type refrigerating machine |
| CN108592444A (en) * | 2018-02-06 | 2018-09-28 | 华北电力大学 | A kind of electric heat pump and the compound heat-exchange unit of absorption heat pump |
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| CN112283981A (en) | 2021-01-29 |
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