CN112902281A - Cold and hot combined equipment based on carbon dioxide heat pump - Google Patents
Cold and hot combined equipment based on carbon dioxide heat pump Download PDFInfo
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- CN112902281A CN112902281A CN201911230005.2A CN201911230005A CN112902281A CN 112902281 A CN112902281 A CN 112902281A CN 201911230005 A CN201911230005 A CN 201911230005A CN 112902281 A CN112902281 A CN 112902281A
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- Prior art keywords
- heat
- heat exchanger
- pipeline
- carbon dioxide
- water
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 40
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 140
- 239000003507 refrigerant Substances 0.000 claims abstract description 45
- 239000002918 waste heat Substances 0.000 claims abstract description 21
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 4
- 235000020679 tap water Nutrition 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/123—Compression type heat pumps
-
- 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]
- Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
本发明公开一种基于二氧化碳热泵冷热联用设备，包括二氧化碳热泵系统、热水供应管路、第三换热器以及余热回收管路，二氧化碳热泵系统包括以二氧化碳制冷剂为冷媒并通过制冷剂管路依次连接的压缩机、第一换热器、膨胀阀和第二换热器，热水供应管路与一外部水源相连通，热水供应管路和制冷剂管路在第一换热器内进行换热，第三换热器通过制冷剂管路连接在膨胀阀和第二换热器之间，余热回收管路与热水供应管路流体连通且用于回收热水供应管路排放的热水，余热回收管路与制冷剂管路在第三换热器内进行换热。本发明通过将热水供应管路排放后的热水的余热传递给制冷剂，并参与热泵系统的循环，能够在一定程度上提高能源的利用率。
The invention discloses a combined cooling and heating equipment based on a carbon dioxide heat pump, comprising a carbon dioxide heat pump system, a hot water supply pipeline, a third heat exchanger and a waste heat recovery pipeline. The compressor, the first heat exchanger, the expansion valve and the second heat exchanger are connected in sequence by the pipeline, the hot water supply pipeline is communicated with an external water source, and the hot water supply pipeline and the refrigerant pipeline are in the first heat exchange Heat exchange is performed in the heat exchanger, the third heat exchanger is connected between the expansion valve and the second heat exchanger through the refrigerant line, and the waste heat recovery line is in fluid communication with the hot water supply line and is used to recover the hot water supply line The discharged hot water, the waste heat recovery pipeline and the refrigerant pipeline exchange heat in the third heat exchanger. The invention can improve the utilization rate of energy to a certain extent by transferring the waste heat of the hot water discharged from the hot water supply pipeline to the refrigerant and participating in the circulation of the heat pump system.
Description
Technical Field
The invention relates to the technical field of carbon dioxide heat pumps, in particular to cold and heat combined equipment based on a carbon dioxide heat pump.
Background
Carbon dioxide is used as a green environment-friendly refrigerant, the heat dissipation process is a supercritical process, the heat pump using carbon dioxide as the refrigerant is widely applied, and heat sources can be provided for users, such as heat supply for a water supply pipeline of a user side, and all-weather hot water needs can be provided for the users.
The Chinese patent application with the publication number of CN101576283B discloses a trans-critical carbon dioxide heat pump heating water heater, which comprises a trans-critical carbon dioxide heat pump system, a hot water supply system and a heating circulation system; the transcritical carbon dioxide heat pump system comprises a compressor, a first air cooler, a second air cooler, a heat regenerator, an expansion valve and an evaporator which are sequentially arranged on a first circulating pipeline, wherein a hot water supply system comprises a water tank, a first water pump and a hot water outlet valve, a water inlet pipe is arranged on the water tank, the water tank comprises a high-temperature area A, a medium-temperature area B and a low-temperature area C, and the low-temperature area C of the water tank, the first water pump, the first air cooler and the high-temperature area A of the water tank are sequentially connected through pipelines; the hot water outlet valve is respectively connected with the high-temperature area A, the medium-temperature area B and the water inlet pipe of the water tank through three pipelines; the heating circulation system comprises a second air cooler, a second water pump and end equipment which are positioned on a second circulation pipeline.
However, in the above structure, the hot water in the water tank is generally directly discharged after being utilized by the user, which wastes water resources, and a part of waste heat in the discharged hot water can be utilized, so that the directly discharged hot water causes heat loss, which is not favorable for efficient utilization of energy.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a carbon dioxide-based heat pump cold and heat combined device which can recover waste heat of hot water discharged from a user end and has high energy utilization rate.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a carbon dioxide-based heat pump combined cooling and heating device comprises:
the carbon dioxide heat pump system comprises a compressor, a first heat exchanger, an expansion valve and a second heat exchanger which take a carbon dioxide refrigerant as a refrigerant and are sequentially connected through refrigerant pipelines;
the hot water supply pipeline is communicated with an external water source, and the hot water supply pipeline and the refrigerant pipeline exchange heat in the first heat exchanger; characterized in that the cold and heat combined equipment based on the carbon dioxide heat pump also comprises,
a third heat exchanger connected between the expansion valve and the second heat exchanger through the refrigerant pipeline;
and the waste heat recovery pipeline is communicated with the hot water supply pipeline in a fluid manner and is used for recovering hot water discharged by the hot water supply pipeline, and the waste heat recovery pipeline and the refrigerant pipeline exchange heat in the third heat exchanger.
In the above technical solution, preferably, the first heat exchanger is a microchannel air cooler.
In the above technical scheme, preferably, the heat exchanger further comprises a water tank, the second heat exchanger is a coil heat exchanger, and the coil heat exchanger is arranged in the water tank and exchanges heat with the water tank.
In the above technical solution, preferably, the second heat exchanger is an evaporator.
In the above technical scheme, preferably, the water circulation system further comprises a refrigerating device, the refrigerating device is communicated with the water tank through a water circulation pipeline and exchanges heat with the water circulation pipeline, a pump, a water outlet valve and a water supplementing valve are arranged on the water circulation pipeline, and the water supplementing valve is communicated with an external water source.
In the above technical solution, preferably, the refrigeration device is a refrigerator.
In the above technical solution, preferably, the external water source is tap water.
According to the invention, the third heat exchanger and the waste heat recovery pipeline are arranged, the hot water discharged from the hot water supply pipeline is recovered through the waste heat recovery pipeline, and heat exchange is carried out in the third heat exchanger through the waste heat recovery pipeline and the refrigerant pipeline, so that the waste heat of the hot water discharged from the hot water supply pipeline is transferred to the refrigerant and participates in the circulation of the heat pump system, and the utilization rate of energy can be improved to a certain extent.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
wherein: 1. a carbon dioxide heat pump system; 11. a compressor; 12. a first heat exchanger; 13. an expansion valve; 14. a second heat exchanger; 15. a refrigerant line; 2. a hot water supply line; 3. a third heat exchanger; 4. a waste heat recovery pipeline; 5. a water tank; 51. a water circulation pipeline; 52. a pump; 53. a water outlet valve; 54. a water replenishing valve; 6. a refrigeration device.
Detailed Description
For the purpose of illustrating the technical content, the constructional features, the achieved objects and the effects of the invention in detail, reference will be made to the following detailed description of the embodiments in conjunction with the accompanying drawings.
As shown in fig. 1, the carbon dioxide heat pump based combined cooling and heating apparatus includes a carbon dioxide heat pump system 1, a hot water supply pipeline 2, a third heat exchanger 3, a waste heat recovery pipeline 4, a water tank 5, and a refrigerating device 6.
The carbon dioxide heat pump system 1 includes a compressor 11, a first heat exchanger 12, an expansion valve 13, a third heat exchanger 3, and a second heat exchanger 14, which are connected in this order via a refrigerant line 15, using a carbon dioxide refrigerant as a refrigerant. The first heat exchanger 12 is a microchannel air cooler, and the second heat exchanger 14 is a coil heat exchanger disposed in the water tank 5, and exchanges heat with water in the water tank 5 and absorbs heat of the water in the water tank. Of course, the second heat exchanger 14 may also be an evaporator, which absorbs heat from the air in the external environment by exchanging heat with the air in the external environment through convection heat dissipation. The expansion valve 13 is an electronic expansion valve.
The hot water supply line 2 is in communication with an external source of water, such as tap water. The hot water supply pipeline 2 and the refrigerant pipeline 15 exchange heat in the first heat exchanger 12, and when water output by an external water source passes through the hot water supply pipeline 2, the water exchanges heat with the carbon dioxide refrigerant in the refrigerant pipeline 15, so that the heat in the carbon dioxide refrigerant is absorbed, and the water is heated to become hot water.
The waste heat recovery pipeline 4 is in fluid communication with the hot water supply pipeline 2 and is used for recovering hot water discharged from the hot water supply pipeline 2, and the waste heat recovery pipeline 4 and the refrigerant pipeline 15 exchange heat in the third heat exchanger 3. That is, after the user uses the hot water output from the hot water supply line 2, the hot water of the portion is recovered by the waste heat recovery line 4. The recovered hot water exchanges heat with the refrigerant in the refrigerant line 15 in the third heat exchanger 3, so that the heat of the portion of the recovered hot water is transferred to the refrigerant, and the refrigerant absorbing the heat of the hot water participates in the refrigeration cycle of the carbon dioxide heat pump system 1.
The refrigerating device 6 is communicated with the water tank 5 through a water circulation line 51 and exchanges heat with the water circulation line 51, that is, the water in the water tank 5 absorbs heat discharged from the refrigerating device 6, thereby supplying heat to the water tank 5. The water circulation line 51 is provided with necessary components for water circulation and water replenishment, such as a pump 52, an outlet valve 53 and a water replenishment valve 54, and the water replenishment valve 54 is communicated with an external water source such as tap water. The refrigerating apparatus may be a refrigerator cabinet, and heat emitted during the refrigerating process is transferred into the water circulation line 51 to supply heat to the water tank 5.
The working principle of the invention is as follows: the carbon dioxide refrigerant participates in refrigeration cycle in the carbon dioxide heat pump system 1, and is specifically characterized in that the carbon dioxide refrigerant is compressed by a compressor 11 to do work and then is changed into high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant enters a first heat exchanger 12 through a refrigerant pipeline 15, in the first heat exchanger 12, the refrigerant pipeline 15 exchanges heat with a hot water supply pipeline 2, so that heat is supplied to water in the hot water supply pipeline 15, the hot water supply pipeline 15 outputs hot water to be supplied to a user, and the hot water used by the user is recovered by a waste heat recovery pipeline 4; then, the carbon dioxide refrigerant is throttled by the expansion valve to become a low-temperature and low-pressure refrigerant, and when the low-temperature and low-pressure refrigerant passes through the third heat exchanger 3, the low-temperature and low-pressure refrigerant absorbs the heat of the hot water recovered in the hot water supply pipeline 2 in the third heat exchanger 3, starts to rise in temperature, enters the second heat exchanger 14, absorbs the heat of the water in the water tank 5 through the second heat exchanger 14, further rises in temperature, and finally returns to the compressor 11; meanwhile, the water in the water tank 5 is subjected to heat exchange, the temperature of the water is reduced, the water can be directly discharged through the water outlet valve 53 and used as cold water, and the water can also participate in the refrigeration cycle in the water circulation pipeline 51, so that the heat discharged by the refrigeration device 6 is absorbed, the temperature of the water is raised again, and the water returns to the water tank 5 so that the refrigerant in the second heat exchanger 14 can supply heat energy. In the above process, since the waste heat of the discharged hot water is absorbed by the refrigerant and participates in the refrigeration cycle in the carbon dioxide heat pump system 1 again, the energy utilization rate and the energy efficiency ratio of the carbon dioxide heat pump system are both improved to a certain extent. In addition, compare the evaporimeter of air convection formula, adopt coil pipe heat exchanger and water tank to carry out the heat transfer, its heat transfer effect is better.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. A carbon dioxide-based heat pump combined cooling and heating device comprises:
the carbon dioxide heat pump system (1) comprises a compressor (11), a first heat exchanger (12), an expansion valve (13) and a second heat exchanger (14) which take carbon dioxide refrigerant as a refrigerant and are sequentially connected through a refrigerant pipeline (15);
the hot water supply pipeline (2) is communicated with an external water source, and the hot water supply pipeline (2) and the refrigerant pipeline (15) exchange heat in the first heat exchanger (12); characterized in that the cold and heat combined equipment based on the carbon dioxide heat pump also comprises,
a third heat exchanger (3) connected between said expansion valve (13) and said second heat exchanger (14) by said refrigerant line (15);
and the waste heat recovery pipeline (4) is in fluid communication with the hot water supply pipeline (2) and is used for recovering hot water discharged by the hot water supply pipeline (2), and the waste heat recovery pipeline (4) and the refrigerant pipeline (15) exchange heat in the third heat exchanger (3).
2. The carbon dioxide-based heat pump combined cold and heat apparatus according to claim 1, wherein: the first heat exchanger (12) is a microchannel air cooler.
3. The carbon dioxide-based heat pump combined cold and heat apparatus according to claim 1, wherein: the heat exchanger is characterized by further comprising a water tank (5), wherein the second heat exchanger (14) is a coil heat exchanger, and the coil heat exchanger is arranged in the water tank (5) and exchanges heat with the water tank (5).
4. The carbon dioxide-based heat pump combined cold and heat apparatus according to claim 1, wherein: the second heat exchanger (14) is an evaporator.
5. The carbon dioxide-based heat pump combined cold and heat apparatus according to claim 3, wherein: the water-saving refrigerator is characterized by further comprising a refrigerating device (6), wherein the refrigerating device (6) is communicated with the water tank (5) through a water circulation pipeline (51) and exchanges heat with the water circulation pipeline (51), a pump (52), a water outlet valve (53) and a water supplementing valve (54) are arranged on the water circulation pipeline (51), and the water supplementing valve (54) is communicated with an external water source.
6. The carbon dioxide-based heat pump combined cold and heat apparatus according to claim 5, wherein: the refrigerating device (6) is a refrigerated cabinet.
7. The carbon dioxide-based heat pump combined cold and heat apparatus according to claim 5, wherein: the external water source is tap water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911230005.2A CN112902281A (en) | 2019-12-04 | 2019-12-04 | Cold and hot combined equipment based on carbon dioxide heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911230005.2A CN112902281A (en) | 2019-12-04 | 2019-12-04 | Cold and hot combined equipment based on carbon dioxide heat pump |
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| Publication Number | Publication Date |
|---|---|
| CN112902281A true CN112902281A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911230005.2A Pending CN112902281A (en) | 2019-12-04 | 2019-12-04 | Cold and hot combined equipment based on carbon dioxide heat pump |
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| Country | Link |
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| CN (1) | CN112902281A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114642246A (en) * | 2022-03-11 | 2022-06-21 | 江苏金通灵光核能源科技有限公司 | Dried bean production unit |
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| JP2003139431A (en) * | 2001-11-02 | 2003-05-14 | Japan Climate Systems Corp | Vehicular air conditioner |
| CN102022773A (en) * | 2010-11-30 | 2011-04-20 | 上海交通大学 | Carbon dioxide heat pump water heater for recovering bath water afterheat |
| CN204027179U (en) * | 2014-07-18 | 2014-12-17 | 杭州依格塞斯科技有限公司 | Food system refrigeration cold feed device |
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| CN211146673U (en) * | 2019-12-04 | 2020-07-31 | 戴琪 | Cold and hot combined equipment based on carbon dioxide heat pump |
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2019
- 2019-12-04 CN CN201911230005.2A patent/CN112902281A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002318018A (en) * | 2000-03-15 | 2002-10-31 | Denso Corp | Ejector cycle and gas and liquid separator |
| JP2003139431A (en) * | 2001-11-02 | 2003-05-14 | Japan Climate Systems Corp | Vehicular air conditioner |
| CN102022773A (en) * | 2010-11-30 | 2011-04-20 | 上海交通大学 | Carbon dioxide heat pump water heater for recovering bath water afterheat |
| CN204027179U (en) * | 2014-07-18 | 2014-12-17 | 杭州依格塞斯科技有限公司 | Food system refrigeration cold feed device |
| CN104697242A (en) * | 2014-12-17 | 2015-06-10 | 童雨舟 | Waste heat recovery heat pump system for bathroom |
| CN106568234A (en) * | 2016-09-30 | 2017-04-19 | 厦门工源环保科技有限公司 | Megawatt-level carbon dioxide heat pump system applied to community system by using solar energy |
| CN211146673U (en) * | 2019-12-04 | 2020-07-31 | 戴琪 | Cold and hot combined equipment based on carbon dioxide heat pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114642246A (en) * | 2022-03-11 | 2022-06-21 | 江苏金通灵光核能源科技有限公司 | Dried bean production unit |
| CN114642246B (en) * | 2022-03-11 | 2023-11-28 | 江苏金通灵光核能源科技有限公司 | Bean curd production unit |
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