CN114608218A - Double-heat-source coupling type heat pump system - Google Patents
Double-heat-source coupling type heat pump system Download PDFInfo
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- CN114608218A CN114608218A CN202210285590.1A CN202210285590A CN114608218A CN 114608218 A CN114608218 A CN 114608218A CN 202210285590 A CN202210285590 A CN 202210285590A CN 114608218 A CN114608218 A CN 114608218A
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- 230000008878 coupling Effects 0.000 title claims abstract description 10
- 238000010168 coupling process Methods 0.000 title claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000005338 heat storage Methods 0.000 claims abstract description 25
- 230000001502 supplementing effect Effects 0.000 claims abstract description 9
- 239000003507 refrigerant Substances 0.000 claims description 19
- 230000009977 dual effect Effects 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 23
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000013526 supercooled liquid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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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
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a double-heat-source coupling heat pump system which comprises a compressor, an evaporator, a solar thermal collector, a heat exchanger and a heat regenerator, wherein the compressor is provided with an exhaust port, a return air port and an air supplementing port, and the exhaust port is connected with an inlet of the evaporator, a low-temperature inlet of the heat regenerator and an outlet of the heat exchanger through a four-way valve; the air return port is connected with a low-temperature outlet of the heat regenerator; the air supplementing port is connected with the outlet end of the solar heat collector through the heat storage device; the high-temperature inlet of the heat regenerator is connected with the evaporator through an expansion valve, and the high-temperature outlet of the heat regenerator is connected with the inlet of the heat exchanger; the inlet end of the solar heat collector is connected with the evaporator through an expansion valve. The invention solves the problems of serious heating capability and energy efficiency attenuation of the heat pump at low environmental temperature, and greatly improves the energy efficiency, application range and energy-saving and emission-reducing values of the heat pump. Meanwhile, the system can supply enough hot water with proper temperature for various life in four seasons, so that the energy is saved, and the cost performance is higher.
Description
Technical Field
The invention relates to a heat pump, in particular to a solar energy and air energy double-heat-source coupling type heat pump system.
Background
The air source heat pump is a mature new energy technology product and has been applied internationally for many years. The energy-saving hot water is gradually popularized and applied in domestic markets in the last decade, the principle of the energy-saving hot water is that low-quality heat in air is absorbed and works through a compressor to generate high-quality heat, and domestic hot water with the temperature as high as about 55 ℃ is produced through condensation and exchange, so that the energy-saving hot water has a good energy-saving effect of more than or equal to about 1-4.
With the development of economy, the continuous improvement of the living standard of people and the development of urbanization construction, living heating becomes the rigid demand of people in winter. 3060 the new period of "double carbon" action puts higher demands on heat pump technology for the overall development and application of clean energy. At present, a large-scale project of changing coal into electricity is carried out, an electric energy driven heat pump is adopted to gradually replace traditional heating equipment, and the trend is great, and the heat pump starts to enter thousands of households under the promotion of the project. However, when the heat pump is used for heating, the problems of serious heating capacity and energy efficiency attenuation at low ambient temperature exist, and most of areas needing heating in winter are under the working condition, so that the final application cost is extremely high, and the main problem of hindering the popularization and the use of the technology is solved. In order to solve the problems, the conventional heat pump mostly adopts an enhanced vapor injection technology, and the principle of the enhanced vapor injection technology is that a part of refrigerant with intermediate pressure is sucked through an intermediate pressure suction hole, the refrigerant is mixed with the partially compressed refrigerant and then compressed, and a single compressor realizes two-stage compression, so that the flow of the refrigerant in a condenser is increased, the enthalpy difference of a main circulation loop is increased, and the efficiency of the compressor is further improved. Although the operation capacity and the energy efficiency of the heat pump are improved to a certain extent, the refrigerant injection with the subcooler has limited amplitude for actually improving the heating capacity and the energy efficiency of the heat pump because the injection refrigerant and the refrigerant in the main loop use internal heat exchange and do not absorb heat from the outside, and in the practical application process, the amplitude for improving the heating capacity of the refrigerant injection heat pump is generally about 10%, and the amplitude for improving the energy efficiency of the heat pump is more limited, so that the comprehensive popularization and use of the heat pump are limited when the environmental temperature is lower than-15 ℃. In conclusion, the currently commonly adopted enhanced vapor injection low-temperature heating heat pump still has the difficulty of low energy efficiency under the condition of high and cold, and the problems of higher operation cost and difficult pain point bearing of common people are brought.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a double-heat-source coupling type heat pump system, solar heat energy is coupled to the same system on the basis of single air source heat energy utilization, the heating capacity and the energy efficiency are better, the problem that the heating capacity and the energy efficiency of a heat pump are seriously attenuated at low ambient temperature is solved, and the heat pump can be applied to an area with the ambient temperature lower than-25 ℃, so that the energy efficiency, the application range and the energy saving and emission reduction values of the heat pump are greatly broadened.
The purpose of the invention is realized by the following technical scheme:
a double-heat-source coupling type heat pump system is characterized in that: the system comprises a compressor, an evaporator, a solar thermal collector, a heat exchanger and a heat regenerator, wherein the compressor is provided with an exhaust port, a return air port and an air supplementing port, and the exhaust port is connected with an inlet of the evaporator, a low-temperature inlet of the heat regenerator and an outlet of the heat exchanger through a four-way valve; the air return port is connected with a low-temperature outlet of the heat regenerator; the air supplementing port is connected with the outlet end of the solar heat collector through the heat storage device; the high-temperature inlet of the heat regenerator is connected with the evaporator through an expansion valve, and the high-temperature outlet of the heat regenerator is connected with the inlet of the heat exchanger; the inlet end of the solar heat collector is connected with the evaporator through an expansion valve.
Further, the heat storage device is a heat storage water tank, and an electric heater is arranged in the heat storage water tank. A stop valve is arranged between the heat storage device and the solar heat collector.
In order to facilitate the use, a hot water outlet and a hot water inlet are arranged at the position of the heat storage water tank. Under the condition of not influencing normal heating, enough hot water which is needed by various living and has proper temperature can be supplied all the year round.
A return air temperature sensor is arranged on a pipeline at the return air port of the compressor; an evaporator inlet temperature sensor is arranged on a pipeline at the inlet of the evaporator; an evaporator inlet temperature sensor is arranged on a pipeline connected with the inlet of the solar heat collector; and a pipeline connected with the outlet of the heat exchanger is provided with a heat exchanger outlet temperature sensor. And a high-pressure sensor is arranged on a pipeline connected with the air outlet of the compressor.
The solar heat collector is of a naked structure, and a circulating medium is the same as a refrigerant of the evaporator. The solar heat collector is a flat plate type solar heat collector or a blade type solar heat collector, and can also be a glass tube type solar heat collector.
The invention adopts a double-heat-source (solar energy and air energy) coupling heat pump structure, and the air-supplying heat source of the existing air-supplying enthalpy-increasing technology is mainly used for absorbing the heat of supercooled liquid at a condensing side for increasing enthalpy. In the scheme, an air supplement heat source is from a second heat source such as a solar heat collection evaporator, but the instability of a solar heat source determines that the scheme has no use value, when solar energy serving as the second heat source is not available at night, the air supplement function of a refrigerating system cannot be realized, and at the moment, the circulating amount of a refrigerant of a compressor is insufficient, so that the exhaust temperature of the system is too high, the oil return amount is insufficient, and the system cannot normally operate. The invention adopts the heat storage device and the solar heat collector as auxiliary heat sources at the same time, uses solar energy when solar energy is sufficient in daytime, and uses the water tank for heat storage as the auxiliary heat source at night and when the solar energy is insufficient, thereby ensuring the all-weather stability and reliability of the system.
If another set of auxiliary heat source is not arranged, when the heat outside the air heat source does not meet the condition, the whole system cannot normally operate, and the forced operation may cause system damage or even cause accidents.
Compared with the prior art, the invention has the following advantages:
the double-heat-source coupling heat pump can fully utilize a solar heat source, greatly improves the air inlet temperature of the compressor, converts a low-grade heat source into a high-grade heat source, and greatly improves the heating capacity and the energy efficiency of the heat pump, and simultaneously, the heat accumulator is arranged to provide an auxiliary heat source to supplement air to the air supplementing port of the compressor when no sun exists, and the problem that the heating capacity and the energy efficiency of the heat pump are seriously attenuated at low ambient temperature is solved, so that the heat pump can be applied to the area with the ambient temperature lower than-25 ℃, the energy efficiency of the heat pump is greatly improved, and the application range of the heat pump is widened.
Meanwhile, the system overcomes the defect that the existing heat pump heating system can not provide domestic hot water, can supply enough hot water required by various lives at proper temperature all the year round without influencing normal heating, and is more energy-saving and higher in cost performance.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The labels in the figure are: 1-compressor, 2-evaporator, 3-solar heat collector, 4-heat exchanger, 5-heat regenerator, 6-four-way valve, 7-heat storage device, 8-expansion valve, 9-stop valve, 11-exhaust port, 12-return port, 13-air make-up port.
Detailed Description
The invention is described in detail below with reference to the figures and the detailed description.
A double-heat-source coupling heat pump system is shown in figure 1 and comprises a compressor 1, an evaporator 2, a solar heat collector 3, a heat exchanger 4 and a heat regenerator 5, wherein the compressor is provided with an exhaust port 11, a return air port 12 and an air supplementing port 13, and the exhaust port is connected with an inlet of the evaporator, a low-temperature inlet of the heat regenerator and an outlet of the heat exchanger through a four-way valve 6; the air return port is connected with a low-temperature outlet of the heat regenerator; the air supplementing port is connected with the outlet end of the solar heat collector through the heat storage device 7; the high-temperature inlet of the heat regenerator is connected with the evaporator through an expansion valve 8, and the high-temperature outlet of the heat regenerator is connected with the inlet of the heat exchanger; the inlet end of the solar heat collector is connected with the evaporator through an expansion valve.
The heat storage device is a heat storage water tank, and an electric heater is arranged in the heat storage water tank. A stop valve 9 is arranged between the heat storage device and the solar heat collector. The hot water outlet and the hot water inlet are arranged at the position of the heat storage water tank for convenient use, and the hot water can be supplied with sufficient hot water required by various living in all seasons under the condition of not influencing normal heating.
A return air temperature sensor is arranged on a pipeline at the return air port of the compressor; an evaporator inlet temperature sensor is arranged on a pipeline at the inlet of the evaporator; an evaporator inlet temperature sensor is arranged on a pipeline connected with the inlet of the solar heat collector; and a pipeline connected with the outlet of the heat exchanger is provided with a heat exchanger outlet temperature sensor. And a high-pressure sensor is arranged on a pipeline connected with the air outlet of the compressor.
The solar heat collector is of a naked structure, and the circulating medium is the same as the refrigerant of the evaporator. The solar heat collector is a flat plate type solar heat collector or a blade type solar heat collector, and can also be a glass tube type solar heat collector.
The heat regenerator is a heat exchanger, which realizes heat exchange between high-temperature supercooled liquid refrigerant and low-temperature gas refrigerant, and can be a plate heat exchanger or a sleeve-type or other novel heat exchanger. In fig. 1, the upper left and right interfaces of the regenerator 5 are high-temperature side interfaces, and the lower left and right interfaces are low-temperature side interfaces. The high-temperature side is connected between the outlet of the condenser and the expansion valve, the low-temperature side is connected between the four-way valve and the air suction port of the compressor, and through heat exchange between the high-temperature side and the low-temperature side, high-temperature liquid coming out of the condenser is further cooled through a heat regenerator, sensible heat of condensed liquid refrigerant is recovered, the supercooling degree of liquid inlet of the expansion valve is improved, the gas phase proportion of the refrigerant at the outlet of the expansion valve is reduced, and therefore the heat exchange efficiency and the energy efficiency ratio of the evaporator are improved. The low-temperature steam which is discharged from the four-way valve and contains a small amount of liquid is further evaporated and absorbed by the heat regenerator, so that the heating capacity of the system can be increased, and the reliability of the system can be improved.
In the invention, the heat storage device is used for supplying auxiliary heat source to supplement air to the air supplement port of the compressor when no sun exists, and aims to improve the circulation quantity of the refrigerant and reduce the exhaust temperature so as to ensure that the compressor can still normally run under the condition of low ring temperature, which is equivalent to using the redundant heat of the air energy heat pump when the sun exists in the daytime to fill up the insufficient heating quantity at night. The heat storage device can be a heat storage water tank or other types of devices and is used for providing an auxiliary heat source to assist in heating the refrigerant entering the air supplement port of the compressor when no sun exists. Without this system, the night minimum operating temperature of the dual source air energy heat pump cannot reach-25 degrees.
When the system works under a normal working condition (the environment temperature is moderate, and the system is illuminated in the daytime or the environment temperature is low but illuminated), the evaporator normally obtains a low-grade heat source from the air environment, and meanwhile, the second injection system which is connected with the solar heat collector and is arranged on the compressor absorbs a medium-high-grade heat source from solar energy to enter the compressor, and the two heat sources are simultaneously conveyed into the compressor, so that the integral suction temperature is greatly improved, the problem of insufficient input heat energy in a low-temperature environment is solved, the integral energy efficiency of the heat pump system is greatly improved, and the use cost of the heating system based on the heat pump system is reduced.
When the system works under an extreme working condition (the ring temperature is extremely low and no light), the heat accumulator can provide an auxiliary heat source to supplement air for the air supplement port of the compressor under the working condition, the circulation quantity of the refrigerant is increased, and the exhaust temperature is reduced, so that the compressor can still normally run under the condition of low ring temperature, namely, the surplus heat of the air energy heat pump when the sun exists in the daytime is used for filling the defect of insufficient heating quantity at night, and the lowest running temperature at night can reach-25 ℃. The heat pump can be applied to the area with the environment temperature lower than minus 25 ℃, has extremely high energy-saving efficiency,
the operation cost of the whole heat pump heating system is kept at an extremely low level.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A double-heat-source coupling type heat pump system is characterized in that: the system comprises a compressor (1), an evaporator (2), a solar heat collector (3), a heat exchanger (4) and a heat regenerator (5), wherein the compressor (1) is provided with an exhaust port (11), a return air port (12) and an air supplementing port (13), and the exhaust port (11) is connected with an inlet of the evaporator (2), a low-temperature inlet of the heat regenerator (5) and an outlet of the heat exchanger (4) through a four-way valve (6); the air return port (12) is connected with a low-temperature outlet of the heat regenerator (5); the air supplementing port (13) is connected with the outlet end of the solar heat collector (3) through the heat storage device (7); a high-temperature inlet of the heat regenerator (5) is connected with the evaporator (2) through an expansion valve (8), and a high-temperature outlet is connected with an inlet of the heat exchanger (4); the inlet end of the solar heat collector (3) is connected with the evaporator (2) through an expansion valve (8).
2. A dual heat source coupled heat pump system according to claim 1, wherein: the heat storage device (7) is a heat storage water tank, and an electric heater is arranged in the heat storage water tank.
3. A dual heat source coupled heat pump system according to claim 2, wherein: a hot water outlet and a hot water inlet are arranged at the heat storage water tank.
4. A dual heat source coupled heat pump system according to claim 1, wherein: a stop valve (9) is arranged between the heat storage device (7) and the solar heat collector (3).
5. A dual heat source coupled heat pump system according to claim 1, wherein: a return air temperature sensor is arranged on a pipeline at a return air port (12) of the compressor; an evaporator inlet temperature sensor is arranged on a pipeline at the inlet of the evaporator (2); an evaporator inlet temperature sensor is arranged on a pipeline connected with the inlet of the solar heat collector (3); and a heat exchanger outlet temperature sensor is arranged on a pipeline connected with the outlet of the heat exchanger (4).
6. The dual heat source coupled heat pump system of claim 1, wherein: a high-pressure sensor is arranged on a pipeline connected with the exhaust port (11) of the compressor.
7. A dual heat source coupled heat pump system according to claim 1, wherein: the solar heat collector (3) is of a naked structure, and the circulating medium is the same as the refrigerant of the evaporator (2).
8. A dual heat source coupled heat pump system according to claim 7, wherein: the solar heat collector (3) is a flat plate type solar heat collector.
9. A dual heat source coupled heat pump system according to claim 7, wherein: the solar heat collector (3) is a glass tube type solar heat collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210285590.1A CN114608218A (en) | 2022-03-23 | 2022-03-23 | Double-heat-source coupling type heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210285590.1A CN114608218A (en) | 2022-03-23 | 2022-03-23 | Double-heat-source coupling type heat pump system |
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| CN114608218A true CN114608218A (en) | 2022-06-10 |
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| CN202210285590.1A Pending CN114608218A (en) | 2022-03-23 | 2022-03-23 | Double-heat-source coupling type heat pump system |
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| CN112066583A (en) * | 2020-09-14 | 2020-12-11 | 珠海格力电器股份有限公司 | Air conditioning unit with double heat sources and control method thereof |
-
2022
- 2022-03-23 CN CN202210285590.1A patent/CN114608218A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596283Y (en) * | 2002-09-09 | 2003-12-31 | 张振华 | Heat pump refrigeratng and heating device for solar greenhouse |
| JP2010271030A (en) * | 2009-04-24 | 2010-12-02 | Daikin Ind Ltd | Refrigerating system |
| CN103499163A (en) * | 2013-09-24 | 2014-01-08 | 青岛科技大学 | Direct expansion type solar heat pump air conditioning system |
| CN104567073A (en) * | 2013-10-28 | 2015-04-29 | 珠海格力电器股份有限公司 | Air conditioning cycle system |
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| CN108266877A (en) * | 2017-12-20 | 2018-07-10 | 同济大学 | The air-exhaust heat-recovery fresh air handling air-conditioner set of carbon dioxide trans-critical cycle |
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