CN110762580A - Double-evaporator air injection enthalpy-increasing cold and hot water unit - Google Patents
Double-evaporator air injection enthalpy-increasing cold and hot water unit Download PDFInfo
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- CN110762580A CN110762580A CN201911224833.5A CN201911224833A CN110762580A CN 110762580 A CN110762580 A CN 110762580A CN 201911224833 A CN201911224833 A CN 201911224833A CN 110762580 A CN110762580 A CN 110762580A
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- evaporator
- vapor injection
- enhanced vapor
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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
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
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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
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
Abstract
The invention relates to the technical field of energy-saving devices, and provides a dual-evaporator enhanced vapor injection cold and hot water unit which comprises an enhanced vapor injection compressor, wherein an outlet and a main air suction port of the enhanced vapor injection compressor are respectively connected with a condenser and a main path evaporator; a secondary air suction port of the enhanced vapor injection compressor is connected with the branch evaporator; the main path evaporator and the branch path evaporator are also respectively connected with a main path expansion valve and a branch path expansion valve; the branch evaporator comprises a refrigerant pipeline and a water loop pipeline. Therefore, the invention is respectively connected with the condenser and the main-line evaporator through the outlet of the enhanced vapor injection compressor and the main air suction port; and a secondary air suction port of the enhanced vapor injection compressor is connected with the branch evaporator. The branch evaporator can utilize an external heat source to strengthen heating, such as clean energy or waste heat resources, so that comprehensive utilization of energy is realized, the efficiency of the unit is improved, the heating capacity of the unit is strengthened, the exhaust temperature of the compressor is reduced, and the application range of the unit in cold regions is widened.
Description
Technical Field
The invention belongs to the technical field of energy-saving devices, and particularly relates to a dual-evaporator enhanced vapor injection cold and hot water unit.
Background
The coal-fired heating in winter is an important reason for the formation of haze and acid rain in winter in the north, and a clean and efficient heating technology is a research direction urgently needed by the current environmental problems.
The heat pump utilizes air energy to heat, has the characteristics of energy conservation, high efficiency and environmental protection, and also becomes main technical transformation equipment of coal-to-electricity engineering in China, however, the heat pump unit, particularly the air source heat pump unit has the problems of overhigh exhaust temperature, overlarge compression ratio and sharp attenuation of heating performance under low-temperature working conditions, and the application range of the air source heat pump is limited.
At present, the waste heat resources in China are rich, and with the progress of renewable clean energy utilization technology, a single energy heating system is improved day by day. The air source heat pump system is generally accepted as a simple, rapid, energy-saving and environment-friendly heating device, how to enhance the low-temperature working condition performance by using the improvement of the system becomes the main direction of the development of the heat pump heating technology.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a dual-evaporator enhanced vapor injection cold and hot water unit which is respectively connected with a condenser and a main-line evaporator through an outlet and a main air suction port of an enhanced vapor injection compressor; and a secondary air suction port of the enhanced vapor injection compressor is connected with the branch evaporator. The branch evaporator can utilize an external heat source to strengthen heating, such as clean energy or waste heat resources, so that comprehensive utilization of energy is realized, the efficiency of the unit is improved, the heating capacity of the unit is strengthened, the exhaust temperature of the compressor is reduced, and the application range of the unit in cold regions is widened.
In order to achieve the purpose, the invention provides a dual-evaporator enhanced vapor injection cold and hot water unit which comprises an enhanced vapor injection compressor, wherein an outlet and a main air suction port of the enhanced vapor injection compressor are respectively connected with a condenser and a main path evaporator; the enhanced vapor injection compressor is also provided with a secondary air suction port, and the secondary air suction port is connected with the branch evaporator;
the main path evaporator and the branch path evaporator are also respectively connected with a main path expansion valve and a branch path expansion valve; the main-line expansion valve and the branch expansion valve are both connected with a condenser;
the branch evaporator comprises a refrigerant pipeline and a water loop pipeline; the inlet and the outlet of the refrigerant pipeline are respectively connected with the branch expansion valve and the enhanced vapor injection compressor; circulating water is communicated in the water loop pipeline.
According to the dual-evaporator enhanced vapor injection cold and hot water unit, circulating water in the water loop pipeline is heated by an external heat source.
According to the dual-evaporator enhanced vapor injection cold and hot water unit, the external heat source is clean energy or waste heat resource.
According to the dual-evaporator enhanced vapor injection cold and hot water unit, the clean energy is solar energy, wind energy, biomass energy or geothermal energy and the like.
According to the dual-evaporator enhanced vapor injection cold and hot water unit, the branch evaporator is a water-cooling evaporator.
According to the dual-evaporator enhanced vapor injection cold and hot water unit, a main air suction port and an outlet of an enhanced vapor injection compressor are connected with a condenser and a main path evaporator through a four-way reversing valve; the main-line evaporator and the condenser are respectively connected with a main-line expansion valve.
According to the dual-evaporator air injection enthalpy-increasing cold and hot water unit, the trunk expansion valve is connected with the check valve in parallel.
According to the dual-evaporator air-injection enthalpy-increasing cold and hot water unit, the main-line evaporator is an air-cooled evaporator.
The invention aims to provide a double-evaporator enhanced vapor injection cold and hot water unit, which is characterized in that an outlet of an enhanced vapor injection compressor and a main air suction port are respectively connected with a condenser and a main path evaporator; and a secondary air suction port of the enhanced vapor injection compressor is connected with the branch evaporator. The branch evaporator can utilize an external heat source to strengthen heating, such as clean energy or waste heat resources, so that comprehensive utilization of energy is realized, the efficiency of the unit is improved, the heating capacity of the unit is strengthened, the exhaust temperature of the compressor is reduced, and the application range of the unit in cold regions is widened.
Drawings
FIG. 1 is a schematic diagram of the construction of a working condition of the present invention;
FIG. 2 is a schematic diagram of the construction of a working condition of the present invention;
in the figure: 1-an enhanced vapor injection compressor, 2-a branch evaporator and 21-a branch expansion valve; 3-condenser, 4-main evaporator, 5-four-way change valve, 6-main expansion valve, 61-check valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 2, the invention provides a dual-evaporator enhanced vapor injection cold and hot water unit, which comprises an enhanced vapor injection compressor 1, wherein an outlet and a main air suction port of the enhanced vapor injection compressor 1 are respectively connected with a condenser 3 and a main path evaporator 4; the enhanced vapor injection compressor 1 is also provided with a secondary air suction port which is connected with the branch evaporator 2;
the main-line evaporator 4 and the branch-line evaporator 2 are also respectively connected with a main-line expansion valve 6 and a branch-line expansion valve 21; the main-line expansion valve 6 and the branch expansion valve 21 are both connected with the condenser 3;
the branch evaporator 2 comprises a refrigerant pipeline and a water loop pipeline; the inlet and the outlet of the refrigerant pipeline are respectively connected with the branch expansion valve 21 and the enhanced vapor injection compressor 1; circulating water is communicated in the water loop pipeline.
The refrigerant in the enhanced vapor injection compressor 1 is condensed into liquid in the condenser 3 and simultaneously releases heat, and then respectively enters the trunk evaporator 4 and the branch evaporator 2, and the liquid refrigerant absorbs heat therein and turns into gas; and then respectively enters the enhanced vapor injection compressor 1 to carry out the next cycle. Due to the action of the branch evaporator 2, the mixed cooling effect in the working cavity of the compressor is strengthened, the exhaust temperature of the compressor is effectively reduced, and the stability and the economy of the low-temperature working condition operation of the unit are enhanced.
In order to better improve the heating capacity of the compressor, the circulating water in the water loop pipeline of the branch evaporator 2 is heated by an external heat source. The external heat source can be clean energy such as solar energy, wind energy, biomass energy or geothermal energy, and can also be residual heat in other forms, such as cooling water of a thermal power plant.
The bypass evaporator 2 is preferably a water-cooled evaporator. The main evaporator 4 is preferably an air-cooled evaporator.
In order to enable the unit to be suitable for winter working conditions and summer working conditions at the same time, a main air suction port and an outlet of the enhanced vapor injection compressor 1 are connected with a condenser 3 and a main-path evaporator 4 through a four-way reversing valve 5; the main-line evaporator 4 and the condenser 3 are respectively connected with a main-line expansion valve 6. Preferably, the main expansion valve 6 is connected in parallel with a check valve 61.
Fig. 1 shows the winter conditions, and the working principle is as described above.
Fig. 2 shows the summer working condition, the four-way reversing valve 5 switches the flow direction of the refrigerant, at this time, the main evaporator 4 has the condensation function, and the condenser 3 has the evaporation function to provide cold air. Under the working condition, the branch evaporator 2 absorbs heat to reduce the temperature of circulating water and provide cold water.
In summary, the invention provides a dual-evaporator enhanced vapor injection cold and hot water unit, which is respectively connected with a condenser and a main path evaporator through an outlet and a main air suction port of an enhanced vapor injection compressor; and a secondary air suction port of the enhanced vapor injection compressor is connected with the branch evaporator. The branch evaporator can utilize an external heat source to strengthen heating, such as clean energy or waste heat resources, so that comprehensive utilization of energy is realized, the efficiency of the unit is improved, the heating capacity of the unit is strengthened, the exhaust temperature of the compressor is reduced, and the application range of the unit in cold regions is widened.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The dual-evaporator enhanced vapor injection cold and hot water unit is characterized by comprising an enhanced vapor injection compressor, wherein an outlet and a main air suction port of the enhanced vapor injection compressor are respectively connected with a condenser and a main-path evaporator; the enhanced vapor injection compressor is also provided with a secondary air suction port, and the secondary air suction port is connected with the branch evaporator;
the main path evaporator and the branch path evaporator are also respectively connected with a main path expansion valve and a branch path expansion valve; the main-line expansion valve and the branch expansion valve are both connected with a condenser;
the branch evaporator comprises a refrigerant pipeline and a water loop pipeline; the inlet and the outlet of the refrigerant pipeline are respectively connected with the branch expansion valve and the enhanced vapor injection compressor; circulating water is communicated in the water loop pipeline.
2. The dual evaporator enhanced vapor injection chiller-heater unit of claim 1 wherein the circulating water in the water loop line is heated using an external heat source.
3. The dual evaporator enhanced vapor injection chiller-heater unit of claim 2 wherein the external heat source is a clean energy or waste heat resource.
4. The dual evaporator enhanced vapor injection chiller-heater unit of claim 3 wherein the clean energy source is solar, wind, biomass, or geothermal.
5. The dual-evaporator enhanced vapor injection chiller-heater unit according to any one of claims 1-4, wherein the branch evaporator is a water-cooled evaporator.
6. The dual-evaporator enhanced vapor injection chiller-heater unit according to claim 5, wherein the main suction port and the outlet of the enhanced vapor injection compressor are connected to the condenser and the main evaporator through a four-way reversing valve; the main-line evaporator and the condenser are respectively connected with a main-line expansion valve.
7. The dual evaporator enhanced vapor injection chiller/heater unit of claim 6 wherein the main expansion valve is connected in parallel with a check valve.
8. The dual evaporator enhanced vapor injection chiller-heater unit of claim 6 or 7 wherein the main line evaporator is an air cooled evaporator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019106150289 | 2019-07-09 | ||
| CN201910615028 | 2019-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110762580A true CN110762580A (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911224833.5A Withdrawn CN110762580A (en) | 2019-07-09 | 2019-12-04 | Double-evaporator air injection enthalpy-increasing cold and hot water unit |
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| CN (1) | CN110762580A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023155330A1 (en) * | 2022-02-18 | 2023-08-24 | 安徽美芝制冷设备有限公司 | Refrigeration system and refrigeration device |
-
2019
- 2019-12-04 CN CN201911224833.5A patent/CN110762580A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023155330A1 (en) * | 2022-02-18 | 2023-08-24 | 安徽美芝制冷设备有限公司 | Refrigeration system and refrigeration device |
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Application publication date: 20200207 |