CN113686022B - Improved gas heat pump cold and hot water unit - Google Patents
Improved gas heat pump cold and hot water unit Download PDFInfo
- Publication number
- CN113686022B CN113686022B CN202110973299.9A CN202110973299A CN113686022B CN 113686022 B CN113686022 B CN 113686022B CN 202110973299 A CN202110973299 A CN 202110973299A CN 113686022 B CN113686022 B CN 113686022B
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- China
- Prior art keywords
- water
- circulation loop
- cooling water
- heat exchanger
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000000498 cooling water Substances 0.000 claims abstract description 54
- 238000004378 air conditioning Methods 0.000 claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims abstract description 24
- 230000009347 mechanical transmission Effects 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B2327/00—Refrigeration system using an engine for driving a compressor
- F25B2327/001—Refrigeration system using an engine for driving a compressor of the internal combustion type
-
- 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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention relates to an improved gas heat pump hot and cold water unit, which comprises a refrigerant circulation loop formed by a compressor, oil, a four-way valve, an outdoor heat exchanger, an electronic expansion valve, a plate heat exchanger and air components; the compressor is driven by a gas engine; a cooling water tank is arranged on the engine; the engine cooling water loop comprises a first water circulation loop and a second water circulation loop which are connected in parallel; the first water circulation loop is composed of the cooling water tank and a radiator; the second water circulation loop is formed by the cooling water tank and a cooling water pipeline in the plate heat exchanger; the first water circulation loop and the second water circulation loop are respectively provided with a first electromagnetic valve and a second electromagnetic valve; an air-conditioning water pipeline is arranged in the plate heat exchanger; the air-conditioning water pipeline, the cooling water pipeline and the refrigerant pipeline in the plate heat exchanger can exchange heat mutually. According to the invention, under a heating mode, the air-conditioning water can be directly subjected to heat exchange with the cooling water of the engine, so that the heat exchange efficiency is improved.
Description
Technical Field
The invention relates to an air conditioning system, in particular to a gas hot and cold water unit, and specifically relates to an improved gas heat pump hot and cold water unit.
Background
Along with the national proposal of 'carbon reaching peak', 'carbon neutralization' strategy, the use proportion of natural gas as cleaner energy rises year by year. Air conditioning systems using natural gas drives are also slowly coming into the public view.
The gas heat pump air conditioner has the characteristics of higher primary energy utilization rate and lower emission relative to coal, and the heating effect of the gas heat pump air conditioner is obviously better than that of the traditional electric air conditioner because the air conditioning system can recycle the heat generated by the engine.
The gas heat pump air conditioner on the market at present can be used for exchanging heat with engine cooling water through the refrigerant when in heating operation, so that the refrigerant can recover the heat of the cooling water, and the heating effect of the air conditioner is improved. However, this method requires a part of the refrigerant to be distributed for heat exchange with the cooling water, and thus requires precise control of the refrigerant amount. If the distribution is too large, the amount of refrigerant in the main circulation circuit decreases, and if the distribution is too small, the heat of the cooling water cannot be sufficiently recovered. Thus, the control of such air conditioning systems is overly complex and cumbersome, and is not conducive to marketing.
Therefore, there is a need for improvements to existing gas heat pump air conditioning systems that better meet market demands.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides an improved gas heat pump hot and cold water unit which can enable cooling water of an engine to directly exchange heat with hot and cold water of an air conditioner, thereby omitting intermediate secondary heat exchange, improving heat exchange efficiency, simplifying control procedures and fully meeting market demands.
The technical scheme of the invention is as follows:
the utility model provides an improved gas heat pump cold and hot water unit, includes refrigerant circulation loop and engine cooling water return circuit, refrigerant circulation loop includes following connection: the exhaust port of the compressor is connected with the first end of the four-way valve after oil passes through the air inlet of the compressor and is connected with the air separation outlet; the second end of the four-way valve is connected with the third end of the four-way valve after sequentially passing through the outdoor unit heat exchanger and the plate heat exchanger; the fourth end of the four-way valve is connected with the inlet of the gas component; the compressor is driven by a gas engine; a cooling water tank is arranged on the engine;
the engine cooling water loop comprises a first water circulation loop and a second water circulation loop which are connected in parallel; the first water circulation loop is formed by connecting the cooling water tank and the radiator; the second water circulation loop is formed by connecting the cooling water tank and a cooling water pipeline in the plate heat exchanger; the first water circulation loop and the second water circulation loop are respectively provided with a first electromagnetic valve and a second electromagnetic valve;
an air-conditioning water pipeline is also arranged in the plate heat exchanger; the air-conditioning water pipeline, the cooling water pipeline and the refrigerant pipeline in the plate heat exchanger can exchange heat mutually.
Further, a water pump is arranged at the water return port of the cooling water tank.
Further, an electronic expansion valve is arranged between the outdoor unit heat exchanger and the plate heat exchanger.
Further, the engine drives the compressor through mechanical transmission, or the engine generates electricity and then supplies power to the compressor to drive.
The invention has the beneficial effects that:
the invention has reasonable design and simple structure, and can directly exchange heat between the cooling water of the engine and the cold and hot water of the air conditioner when the unit operates in a heating mode by additionally arranging the air conditioner water pipeline in the plate heat exchanger, thereby omitting intermediate secondary heat exchange, improving the heat exchange efficiency, simplifying the control program and fully meeting the market demand.
Drawings
Fig. 1 is a schematic diagram of the system architecture of the present invention.
Wherein, 1-compressor; 2-gas separation; 3-oil; 4-four-way valve; 5-outdoor heat exchanger; 6-an electronic expansion valve; 7-plate heat exchanger; 8-a heat sink; 9-a first solenoid valve; 10-a second solenoid valve; 11-a cooling water tank; 12-water pump.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1.
An improved gas heat pump cold and hot water unit comprises a refrigerant circulation loop formed by a compressor 1, oil 3, a four-way valve 4, an outdoor heat exchanger 5, an electronic expansion valve 6, a plate heat exchanger 7, a gas separator 2 and the like, and specifically comprises the following components: the exhaust port of the compressor 1 is connected with the first end of the four-way valve 4 after passing through the oil 3, and the air suction port of the compressor is connected with the outlet of the air separator 2; the second end of the four-way valve 4 sequentially passes through the outdoor heat exchanger 5 and the plate heat exchanger 7 and then is connected with the third end of the four-way valve 4; the fourth end of the four-way valve 4 is connected with the inlet of the air component 2. An electronic expansion valve 6 is arranged between the outdoor heat exchanger 5 and the plate heat exchanger 7 so as to throttle the refrigerant. The outdoor heat exchanger 5 may be a fin heat exchanger in order to improve heat exchange efficiency thereof.
Meanwhile, the compressor 1 is driven by a gas engine. Specifically, the engine drives the compressor through mechanical transmission, or the engine generates power and then supplies power to the compressor to drive.
The engine is provided with a cooling water tank 11 so as to cool the engine and ensure the normal operation of the engine. The cooling water tank 11, the radiator 8 and the plate heat exchanger 7 form a plurality of cooling water loops, and specifically: the cooling water tank 11 and the radiator 8 are connected with each other to form a first water circulation loop, and a first electromagnetic valve 9 is arranged on the loop so as to control the on-off of the loop. The cooling water tank 11 and the cooling water pipeline in the plate heat exchanger 7 are mutually connected to form a second water circulation loop, and a second electromagnetic valve 10 is arranged on the loop so as to control the on-off of the loop. The first water circulation loop and the second water circulation loop are connected in parallel so as to be flexibly controlled and improve the operation efficiency. Meanwhile, the water outlet of the cooling water tank 11 is provided with a water pump 12, so that the flow of cooling water can be promoted, and the cooling effect is ensured.
An air-conditioning water pipeline is also arranged in the plate heat exchanger 7. The air-conditioning water pipeline can be arranged in parallel with the cooling water pipeline and the refrigerant pipeline or in other proper modes so as to enable the three to exchange heat with each other, and enable the air-conditioning water pipeline to generate cold water or hot water to be conveyed to a user.
The working process of the invention is as follows:
1. during heating operation, in the refrigerant circulation loop, the refrigerant sequentially passes through the compressor, the oil separator, the four-way valve, the plate heat exchanger, the electronic expansion valve, the outdoor heat exchanger and the gas-liquid separator to complete circulation, and is discharged in the plate heater to exchange heat with air-conditioning water, so that the temperature of the air-conditioning water is raised.
When the electronic expansion valve is operated, the electronic expansion valve can be opened to a certain opening degree within the range of 80-480 steps, and the operation requirement is met.
Meanwhile, in the cooling water loop, the first electromagnetic valve is closed, the second electromagnetic valve is opened, so that the first water circulation loop is disconnected, and cooling water only passes through the second water circulation loop. At this time, the engine cooling water always passes through the plate heat exchanger and exchanges heat with the air-conditioning water, so that the temperature of the air-conditioning water can be further and rapidly increased, the heat recovery of the cooling water is realized, the energy utilization rate is improved, and the energy-saving and environment-friendly effects are realized.
Because the air-conditioning water exchanges heat with the refrigerant and the engine cooling water in the plate heat exchanger at the same time, the electronic expansion valve can be opened for a certain opening degree, such as 80-480 steps, instead of being fully opened, so that the energy consumption is reduced.
2. During refrigeration operation, the refrigerant runs through a refrigerant circulation loop, condenses and dissipates heat in the heat exchanger of the outdoor unit, throttles through the electronic expansion valve, evaporates and absorbs heat in the plate heat exchanger, exchanges heat with air-conditioning water, and generates air-conditioning cold water.
Meanwhile, the first electromagnetic valve can be opened, the second electromagnetic valve is closed, the second water circulation loop is disconnected, and cooling water only flows in the first water circulation loop. At this time, the cooling water exchanges heat through the radiator, thereby meeting the operation requirement of the engine. Meanwhile, the cooling water does not flow through the plate heat exchanger any more, so that the air conditioner cold water is not influenced.
The invention can directly exchange heat between the air-conditioning water and the cooling water of the engine in a heating mode, omits the process of taking the intermediate refrigerant as a medium for heat transfer, and has higher heat exchange efficiency. Compared with the existing gas heat pump water chiller-heater unit, the gas heat pump water chiller-heater unit is simpler in structure and control, is beneficial to improving the stability and reliability of the system, and is also more beneficial to popularization.
The invention is not related in part to the same as or can be practiced with the prior art.
Claims (3)
1. The utility model provides an improved gas heat pump cold and hot water unit, includes refrigerant circulation loop and engine cooling water loop, its characterized in that, refrigerant circulation loop includes following connection: the exhaust port of the compressor is connected with the first end of the four-way valve after oil passes through the air inlet of the compressor and is connected with the air separation outlet; the second end of the four-way valve is connected with the third end of the four-way valve after sequentially passing through the outdoor unit heat exchanger and the plate heat exchanger; the fourth end of the four-way valve is connected with the inlet of the gas component; the compressor is driven by a gas engine; a cooling water tank is arranged on the engine;
the engine cooling water loop comprises a first water circulation loop and a second water circulation loop which are connected in parallel; the first water circulation loop is formed by connecting the cooling water tank and the radiator; the second water circulation loop is formed by connecting the cooling water tank and a cooling water pipeline in the plate heat exchanger; the first water circulation loop and the second water circulation loop are respectively provided with a first electromagnetic valve and a second electromagnetic valve; an air-conditioning water pipeline is also arranged in the plate heat exchanger; the air-conditioning water pipeline, the cooling water pipeline and the refrigerant pipeline in the plate heat exchanger can exchange heat mutually; an electronic expansion valve is arranged between the outdoor unit heat exchanger and the plate heat exchanger; when the cooling water loop heats, the first electromagnetic valve is closed, the second electromagnetic valve is opened, so that the first water circulation loop is disconnected, and the cooling water only passes through the second water circulation loop; when in refrigeration operation, the first electromagnetic valve is opened, the second electromagnetic valve is closed, so that the second water circulation loop is disconnected, and cooling water only flows in the first water circulation loop;
during refrigeration operation, the refrigerant runs through a refrigerant circulation loop, condenses and dissipates heat in the heat exchanger of the outdoor unit, throttles through the electronic expansion valve, evaporates and absorbs heat in the plate heat exchanger, exchanges heat with air-conditioning water, and generates air-conditioning cold water; at the same time, the first electromagnetic valve is opened, the second electromagnetic valve is closed, the second water circulation loop is disconnected, cooling water only flows in the first water circulation loop, at the moment, the cooling water exchanges heat through the radiator, and the cooling water does not flow through the plate heat exchanger any more.
2. The improved gas heat pump hot and cold water unit according to claim 1, wherein the water return port of the cooling water tank is provided with a water pump.
3. The improved gas heat pump hot and cold water unit according to claim 1, wherein said engine drives said compressor by mechanical transmission, or said engine generates electricity and then supplies power to said compressor for driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973299.9A CN113686022B (en) | 2021-08-24 | 2021-08-24 | Improved gas heat pump cold and hot water unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973299.9A CN113686022B (en) | 2021-08-24 | 2021-08-24 | Improved gas heat pump cold and hot water unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113686022A CN113686022A (en) | 2021-11-23 |
| CN113686022B true CN113686022B (en) | 2023-09-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110973299.9A Active CN113686022B (en) | 2021-08-24 | 2021-08-24 | Improved gas heat pump cold and hot water unit |
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| Country | Link |
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| CN (1) | CN113686022B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777238B (en) * | 2022-05-06 | 2024-03-08 | 南京天加环境科技有限公司 | Cold and hot water unit of low-temperature gas heat pump |
| CN115218309B (en) * | 2022-07-20 | 2023-12-19 | 南京天加环境科技有限公司 | Gas heat pump cold and hot water unit, control method and air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000161814A (en) * | 1998-11-24 | 2000-06-16 | Zexel Corp | Engine-driven heat pump type air conditioner |
| CN1584449A (en) * | 2004-05-27 | 2005-02-23 | 上海交通大学 | Air-cooled hot pumping hot air cold water set driven by gas engine |
| CN204806590U (en) * | 2015-07-16 | 2015-11-25 | Tcl空调器(中山)有限公司 | Gas air conditioning system |
| CN209944638U (en) * | 2019-04-22 | 2020-01-14 | 中南建筑设计院股份有限公司 | Roof type gas heat pump air conditioning unit |
-
2021
- 2021-08-24 CN CN202110973299.9A patent/CN113686022B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000161814A (en) * | 1998-11-24 | 2000-06-16 | Zexel Corp | Engine-driven heat pump type air conditioner |
| CN1584449A (en) * | 2004-05-27 | 2005-02-23 | 上海交通大学 | Air-cooled hot pumping hot air cold water set driven by gas engine |
| CN204806590U (en) * | 2015-07-16 | 2015-11-25 | Tcl空调器(中山)有限公司 | Gas air conditioning system |
| CN209944638U (en) * | 2019-04-22 | 2020-01-14 | 中南建筑设计院股份有限公司 | Roof type gas heat pump air conditioning unit |
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| Publication number | Publication date |
|---|---|
| CN113686022A (en) | 2021-11-23 |
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