CN114777360A - Household small-sized solar energy and air source composite heat pump system - Google Patents
Household small-sized solar energy and air source composite heat pump system Download PDFInfo
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- CN114777360A CN114777360A CN202210339791.5A CN202210339791A CN114777360A CN 114777360 A CN114777360 A CN 114777360A CN 202210339791 A CN202210339791 A CN 202210339791A CN 114777360 A CN114777360 A CN 114777360A
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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
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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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Abstract
The invention relates to a household small-sized solar energy and air source composite heat pump system.A indoor heat exchanger and an outdoor heat exchanger in the system are both parallel flow micro-channel heat exchangers, each parallel flow micro-channel heat exchanger comprises a shell and a plurality of heat exchange modules which are arranged in parallel and positioned in the shell, each heat exchange module comprises a heat exchange shell, a plurality of rows of parallel flow micro-channels arranged in the heat exchange shell, fins arranged between the parallel flow micro-channels and heat/cold accumulation media filled between the heat exchange shell and the parallel flow micro-channels; the upper end and the lower end of the shell are respectively provided with an air outlet module and an air inlet module; in the indoor heat exchanger, an air inlet module is communicated with outdoor fresh air, and an air outlet module is communicated with the indoor space; in the outdoor heat exchanger, the air inlet module and the air outlet module are both communicated with outdoor air, and the surface of the shell of the outdoor heat exchanger is smooth and is provided with a heat absorption coating. The system improves the cold-heat conversion efficiency of the system, reduces the refrigerant charging amount in the system, and reduces the energy consumption of the system and the use cost of a user.
Description
Technical Field
The invention relates to the technical field of solar energy and air energy utilization, in particular to a household small-sized solar energy and air source composite heat pump system.
Background
In order to reduce the carbon emission of buildings and achieve the double-carbon target, the nation encourages the utilization of renewable energy sources such as solar energy and wind energy and zero-carbon nuclear energy to gradually replace fossil energy sources such as coal, petroleum and natural gas for building cooling/heating. For the utilization of renewable energy, photovoltaic power generation, wind-solar power generation and other methods are generally adopted to convert the renewable energy into electric energy for use at present. As a high-efficiency electricity utilization technology, the air source compound heat pump can extract heat from air, convert low-grade heat energy into high-grade heat energy, and reduce electric power waste caused by direct electricity utilization for cold/warm supply.
For an air source heat pump system, most of the traditional indoor units are finned tube heat exchangers, and a building is cooled/heated through a built-in fan. The finned tube heat exchanger is easy to deposit dust and dirt, is inconvenient to clean, and is easy to cause health problems such as respiratory diseases of indoor residents. In addition, the traditional indoor unit adopts a suspended installation mode, so that the temperature at the high part in the room is higher, the temperature of working and moving areas of personnel is lower, and the energy is not effectively and reasonably utilized; when defrosting is performed in winter, the air source heat pump system absorbs heat from indoor air to cause indoor temperature reduction, or an electric heating device needs to be added to the system to further reduce the system energy efficiency, so that the user experience is influenced, meanwhile, the waste of power resources is caused, the use cost of the user is increased, and the popularization and the application of the heat exchanger in the market are not facilitated.
In order to solve the technical problems, the heating comfort is improved, the air source heat pump hot water system is produced at present, indoor cooling/heating is carried out in a heat radiation mode through a floor, a wallboard and the like, but the system needs to carry out secondary heat exchange on a refrigerant and water, the energy efficiency is reduced, the equipment structure is complex, the initial investment and the operating cost are high, and therefore the air source heat pump hot water system is not suitable for general civil houses, in addition, when cooling is carried out in summer, the condensation problem can influence the refrigerating effect of the floor, the wallboard and the like, the wallboard is easy to fall off, the floor is warped, the like, the maintenance cost of a user is further increased, and the popularization and the application of the air source heat pump hot water system on the market are not facilitated.
Although some indoor units in the existing household air-conditioning technology adopt microchannel heat exchangers, the finned tube heat exchangers are only replaced by the microchannel heat exchangers, the structure of the indoor units is similar to that of the traditional indoor units, heat exchange is not directly carried out on the indoor air with outdoor fresh air, and the indoor air is adjusted only through a ventilation mode, so that the indoor air quality is general, and the energy consumption is increased; meanwhile, the existing floor type air conditioner indoor unit is mostly used in large spaces such as living rooms, the air outlet of an air conditioner is high, the temperature near the air outlet is optimum, the temperature of other areas is general, the heat loss is high, and the user experience is poor.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the solar energy-air source compound heat pump system with the parallel flow micro-channel heat exchanger, the system supplies cold/heat by solar energy and air energy in a multi-source mode, the cold-heat conversion efficiency of the system is improved, meanwhile, the parallel flow micro-channel heat exchanger is adopted to replace the traditional finned tube heat exchanger of an indoor unit or an outdoor unit, the refrigerant filling amount in the system is further reduced, the energy consumption of the system is reduced, the use cost of a user is reduced, and the popularization and the application of the solar energy-air source compound heat pump system with the parallel flow micro-channel heat exchanger in the market are facilitated.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a household small-sized solar energy and air source composite heat pump system comprises an indoor heat exchanger, a throttle valve, an outdoor heat exchanger, a four-way reversing valve, a gas-liquid separator and a compressor, wherein the indoor heat exchanger and the outdoor heat exchanger are both parallel flow micro-channel heat exchangers,
the parallel flow microchannel heat exchanger comprises a shell and a plurality of heat exchange modules which are arranged in parallel and are positioned in the shell, wherein each heat exchange module comprises a heat exchange shell, a plurality of rows of parallel flow microchannels arranged in the heat exchange shell and fins arranged among the parallel flow microchannels; the upper end and the lower end of the shell are respectively provided with an air outlet module and an air inlet module, and air enters the body from the air inlet module to exchange heat with the heat exchange module and is discharged through the air outlet module; in the indoor heat exchanger, an air inlet module is communicated with outdoor fresh air, and an air outlet module is communicated with the indoor space; in the outdoor heat exchanger, the air inlet module and the air outlet module are both communicated with outdoor air; the surface of the shell of the outdoor heat exchanger is smooth and is provided with a heat absorption coating.
As one of the preferable schemes of the invention, in the indoor heat exchanger, the air inlet module comprises a fresh air pipe and a fresh air valve, one end of the fresh air pipe is communicated with outdoor air through the fresh air valve, the other end of the fresh air pipe is communicated with the air in the body through a notch, and one side of the fresh air pipe facing a user is provided with an air inlet fence and an air quality sensor; the heat pump system also controls the opening of the fresh air valve in real time according to the value of the air quality sensor.
As one of the preferable schemes of the invention, in the indoor heat exchanger, the air outlet module comprises an air outlet pipe, an indoor fan and an air outlet fence; the heat pump system also controls the rotating speed of the indoor fan in real time according to the value of the air quality sensor.
As one preferable aspect of the present invention, the air quality sensor includes a temperature and humidity sensor and a carbon dioxide concentration sensor.
In a preferred embodiment of the present invention, in the indoor heat exchanger, the heat exchange module further includes a cold/heat storage medium filled in the heat exchange housing.
As one of the preferable schemes of the invention, the indoor heat exchanger is in a floor type, the air outlet fence is positioned at the top of the air outlet pipe, and the indoor fan sends the fresh air after heat exchange into the room through the air outlet fence.
As one of the preferable schemes of the invention, the outdoor heat exchanger is obliquely arranged, an outdoor air inlet fence is arranged on an air inlet module in the outdoor heat exchanger, and an outdoor fan is arranged in an air outlet module.
As one preferable scheme of the present invention, the outdoor heat exchanger, the throttle valve, the four-way reversing valve, the gas-liquid separator and the compressor are all disposed in the outdoor unit combined support shell, a heat absorption coating is disposed on one surface of the outdoor heat exchanger facing the sun, and a reflection plate is disposed on one surface of the outdoor heat exchanger facing away from the sun and disposed between the outdoor heat exchanger and the compressor.
In the indoor heat exchanger, a condensation water tray is arranged at the bottom of a heat exchange module in a shell.
Compared with the prior art, the invention has the following beneficial effects:
1) according to the household small-sized solar energy and air source composite heat pump system, the solar energy and air energy multi-source cooling/heating replaces the cooling/heating of a single cooling and heating source, the system efficiency is higher, the utilization rate of solar energy renewable energy is improved, the carbon emission caused by cooling/heating is reduced, and the energy structure transformation is facilitated.
2) According to the household small-sized solar energy and air source composite heat pump system, the parallel flow micro-channel heat exchanger is adopted to replace the original indoor/outdoor heat exchanger, so that the refrigerant filling amount is reduced, the heat exchange effect is ensured, the conveying energy consumption and energy loss are reduced, and the energy utilization rate is improved.
3) The parallel flow micro-channel heat exchanger adopted by the invention has the advantages of simple and ingenious structure, convenient manufacture, modular production and reduced manufacturing cost, thereby reducing the use cost of users and being beneficial to the popularization and application of the solar energy-air source composite heat pump system in the market.
4) The indoor heat exchanger disclosed by the invention has the advantages that the requirements of cooling in summer and heating in winter are met, the load requirements of a human body activity area are ensured by floor-type installation, and the heat waste caused by heat concentration on a roof is avoided; the built-in heat storage/cold storage medium not only provides heat for defrosting of the system in winter, but also prolongs the duration time of indoor temperature after the system is shut down in winter and summer, improves the indoor comfort and is also beneficial to peak clipping and valley filling of electric power; the fresh air channel is arranged, so that the fresh air requirement is ensured, and a healthy and proper living environment is provided; the parallel flow micro-channel heat exchanger has good heat exchange effect and small volume, and greatly saves the building space.
5) The surface of the outdoor heat exchanger facing the sun is provided with the heat absorption coating, so that the absorption of solar heat energy is increased; the one side of dorsad sun sets up the reflecting plate, has strengthened the heat exchange efficiency with the heat exchanger, avoids sunshine to penetrate the compressor directly simultaneously, causes the overheated damage of compressor, guarantees the high-efficient operation of system, and reinforcing user's use is experienced.
Drawings
FIG. 1 is a schematic structural diagram of a household small-sized solar-air source composite heat pump system;
FIG. 2 is a schematic view of the indoor heat exchanger of the present invention;
FIG. 3 is a cross-sectional elevation view of a cross-flow microchannel arrangement in an indoor heat exchanger according to the present invention;
FIG. 4 is a cross-sectional view of a front view of a longitudinally arranged parallel flow microchannel of an indoor heat exchanger according to the invention;
fig. 5 is a schematic top view of the indoor heat exchanger of the present invention;
FIG. 6 is a cross-sectional view of a cross-flow microchannel arrangement in an indoor heat exchanger according to the present invention;
FIG. 7 is a cross-sectional view of a top view of a longitudinal arrangement of parallel flow microchannels in an indoor heat exchanger according to the present invention;
fig. 8 is a right structural view of the indoor heat exchanger of the present invention;
FIG. 9 is a cross-sectional view of a parallel flow microchannel arrangement in an indoor heat exchanger according to the present invention;
FIG. 10 is a right side structural cross-sectional view of a longitudinal arrangement of parallel flow microchannels within an indoor heat exchanger in accordance with the present invention;
fig. 11 is a schematic structural diagram of an outdoor unit in the household small-sized solar-air source composite heat pump system;
FIG. 12 is a cross-sectional elevation view of a cross-flow arrangement of parallel flow microchannels within an outdoor heat exchanger according to the present invention;
FIG. 13 is a cross-sectional elevation view of a parallel flow microchannel arrangement in an outdoor heat exchanger according to the present invention;
FIG. 14 is a cross-sectional view of a cross-sectional top view of a parallel flow microchannel arrangement in an outdoor heat exchanger according to the present invention;
FIG. 15 is a cross-sectional view of a top view of a longitudinal arrangement of parallel flow microchannels in an outdoor heat exchanger according to the present invention;
FIG. 16 is a cross-sectional view of a parallel flow microchannel arrangement in an outdoor heat exchanger according to the present invention;
FIG. 17 is a cross-sectional view of a right side view of a longitudinally arranged parallel flow microchannel arrangement in an outdoor heat exchanger according to the present invention;
fig. 18 is a schematic flow diagram of the indoor/outdoor heat exchanger cross arrangement of the present invention.
Reference numerals: 1. an indoor heat exchanger; 1-1, an indoor air outlet module; 1-2, an indoor air inlet module; 1-3, indoor air inlet barriers; 1-4, a heat storage medium inlet; 1-5, a heat storage medium outlet; 1-6, indoor refrigerant inlet and outlet copper pipes; 1-7, a condensed water receiving disc; 1-8, indoor microchannel fins; 1-9, an indoor refrigerant manifold; 1-10, a heat exchange module; 1-11 parts of a heat storage medium header pipe; 1-12, a filter screen; 1-13, an indoor fan; 1-14, fresh air pipe; 1-15, heat exchange module fins; 1-16, indoor parallel flow micro-channel; 1-17, a heat exchange shell; 1-18, indoor splitter plate; 2. an outdoor heat exchanger; 2-1, a reflecting plate; 2-2, outdoor air inlet railings; 2-3, an outdoor air inlet module; 2-4, an outdoor air outlet module; 2-5, an outdoor fan; 2-6, outdoor inlet and outlet refrigerant copper pipes; 2-7, an outdoor refrigerant manifold; 2-8, outdoor parallel flow micro-channel; 2-9, outdoor microchannel fins; 2-10 parts of outdoor splitter plate; 3. a throttle valve; 4. a four-way reversing valve; 5. a gas-liquid separator; 6. a compressor; 7. a control device; 8. the outdoor unit assembly supports the casing.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1 to 18, the household small-sized solar air source composite heat pump system is used for cooling in summer and heating in winter of a building; the heat exchanger mainly comprises an indoor heat exchanger 1, a throttle valve 3, an outdoor heat exchanger 2, a four-way reversing valve 4, a gas-liquid separator 5 and a compressor 6, wherein the indoor heat exchanger 1 and the outdoor heat exchanger 2 are both parallel-flow micro-channel heat exchangers.
The parallel flow microchannel heat exchanger comprises a shell and a plurality of heat exchange modules which are arranged in parallel and are positioned in the shell, wherein each heat exchange module comprises a heat exchange shell, a plurality of rows of parallel flow microchannels arranged in the heat exchange shell and fins arranged among the parallel flow microchannels; the upper end and the lower end of the shell are respectively provided with an air outlet module and an air inlet module, and air enters the body from the air inlet module to exchange heat with the heat exchange module and is discharged through the air outlet module; in the indoor heat exchanger, an air inlet module is communicated with outdoor fresh air, and an air outlet module is communicated with the indoor space; in the outdoor heat exchanger, the air inlet module and the air outlet module are both communicated with outdoor air; the surface of the shell of the outdoor heat exchanger is smooth and is provided with a heat absorption coating.
The indoor and outdoor heat exchangers used by the compound heat pump system are parallel flow micro-channel heat exchangers, and compared with a traditional air source heat pump system, the compound heat pump system can effectively absorb solar heat, and the solar energy and air energy can supply cold/heat through multiple energy sources, so that the operation efficiency of the system is improved. In addition, compared with a finned tube heat exchanger in a traditional indoor unit, the parallel flow micro-channel heat exchanger can effectively reduce the refrigerant filling amount of a system, reduces the use cost of a user, reduces the carbon emission caused by refrigerant manufacturing, enhances the use experience of the user, and is favorable for popularization and application of the composite heat pump system in the market.
Specifically, in the indoor heat exchanger, the heat exchange module comprises indoor parallel flow micro channels 1-16, heat exchange shells 1-17 and indoor micro channel fins 1-8 arranged between the parallel flow micro channels, the indoor parallel flow micro channels 1-16 are communicated with indoor refrigerant main pipes 1-9 through indoor flow distribution plates 1-18, the indoor refrigerant main pipes 1-9 are communicated with refrigerant copper pipes 1-6, and refrigerants are distributed into the indoor parallel flow micro channels 1-16 for heat exchange. In order to enhance heat exchange, the heat exchange housings 1-17 are made of metal, preferably aluminum. Meanwhile, heat/cold accumulation media 1-5 are filled between the parallel flow micro-channels in the heat exchange shell, the heat/cold accumulation media play a role in protecting the indoor parallel flow micro-channels 1-16, the accumulated heat can be used for defrosting in winter, and the accumulated cold can be used for refrigerating in summer.
In order to further enhance heat exchange and enhance the use experience of users, heat exchange module fins 1-15 are vertically arranged on the outer wall of a heat exchange shell of each heat exchange module 1-10, a plurality of heat exchange modules 1-10 are connected in parallel to form a heat exchange integral structure, a shell made of metal materials is coated outside the heat exchange integral structure, a distance is reserved between every two adjacent heat exchange modules 1-10, air circulation is facilitated, and a heat storage medium inlet 1-4 and a heat storage medium outlet 1-5 are formed in the side edge of the indoor heat exchanger shell.
The upper end and the lower end of a shell of the indoor heat exchanger 1 are respectively provided with an indoor air outlet module 1-1 and an indoor air inlet module 1-2. In order to ensure the indoor air quality, the indoor air inlet module 1-2 comprises a fresh air pipe 1-14 and a fresh air valve, one end of the fresh air pipe is communicated with outdoor air through the fresh air valve, and the other end of the fresh air pipe is communicated with the air in the shell through a notch. In order to facilitate indoor air return, one side, facing a user, of the indoor air inlet module 1-2 is provided with an indoor air inlet fence 1-3 and an indoor quality sensor, the air quality sensor comprises a temperature and humidity sensor and a carbon dioxide concentration sensor, and the control device 7 can automatically adjust the opening of the fresh air valve according to indoor temperature and humidity and carbon dioxide concentration so as to effectively guarantee the sanitation and health of people in an area.
In order to facilitate heat exchange between the air and the heat exchange module 1-10, the indoor air outlet module 1-1 comprises an air outlet pipe, an air outlet fence and an indoor fan 1-13, wherein the lower part of the air outlet pipe is provided with a notch, the upper part of the air outlet pipe is provided with the air outlet fence, and the air outlet fence is provided with a filter screen 1-12. The control device 7 also automatically adjusts the rotating speed of the indoor fan 3 according to the indoor temperature and humidity and the carbon dioxide concentration. It is worth integratively, in this patent, the air outlet pipe may not be provided with an indoor fan, and depends on the natural convection and radiation heat exchange mode to exchange heat with the indoor air and the wall, so as to improve the indoor comfort and save the energy; in addition, in transition seasons such as spring and autumn, fresh air is sent into indoor air through the fresh air channel by means of natural convection, and a healthy living environment is provided.
In the indoor heat exchanger, the bottom of a heat exchange module in the shell is provided with a condensation water plate 1-7, and the condensation water plate 1-7 is convenient for collecting condensation water in summer, so that the influence of the condensation water on the environment is avoided.
Preferably, indoor heat exchanger 1 designs for the console mode, compares with traditional hanging refrigeration/heat equipment on the wall body, can effectively avoid the heat to pile up at the eminence, and the new trend upwards blows off by indoor fan behind the heat transfer, and the heat in the space is seen off by low to high, is similar to the fin, can strengthen the heat transfer intensity of heat exchanger, and the evaporation/condensation temperature's that existing system of being favorable to reduction can improve space thermal comfort again, and reinforcing user's use is experienced. Indoor parallel flow micro-channels 1-16 in the indoor heat exchanger 1 are arranged in a transverse or longitudinal row, so that the plane faces a wall body, the occupation of building space is reduced, and the cost is reduced.
Specifically, in the outdoor heat exchanger, an outdoor air inlet module 2-3 and an outdoor air outlet module 2-4 are both communicated with outdoor air, an outdoor air inlet barrier 2-2 is arranged on one side of the outdoor air inlet module 2-3, an outdoor fan 2-5 is installed in the outdoor air outlet module 2-4, and heat exchange between each heat exchange module connected in parallel or in series and the air is enhanced through an outdoor fan 2-5.
Outdoor inlet and outlet refrigerant copper pipes 2-6 are welded on outdoor refrigerant main pipes 2-7, the outdoor refrigerant main pipes 2-7 are communicated with outdoor parallel flow micro-channels 2-8 which are arranged in a transverse or longitudinal combination mode through outdoor splitter plates 2-10, and outdoor micro-channel fins 2-9 are arranged on the back face of each outdoor parallel flow micro-channel heat exchanger 2 for further enhancing heat exchange.
The outdoor heat exchanger 2 is an inclined floor type and keeps a certain inclination angle with the ground to ensure the absorption of solar energy, and the surface of the outdoor heat exchanger 2 facing the sun is smooth and is provided with a heat absorption coating to facilitate the heat absorption of solar heat.
In order to ensure the service life of the system, the outdoor unit 2 is installed in the outdoor unit combination support casing 8 together with the throttle valve 3, the four-way reversing valve 4, the gas-liquid separator 5 and the compressor 6. The reflecting plate 2-1 is arranged at the back of the outdoor heat exchanger 2, the reflecting plate 2-1 prevents the sunlight from directly irradiating the compressor 6 while improving the heat exchange amount of the outdoor heat exchanger 2, the reliability of the system operation is ensured, and meanwhile, the reflecting plate 2-1 can also be used for reflecting the sunlight to the smooth back of the heat exchanger to enhance the heat exchange.
The invention relates to a household small-sized solar energy and air source composite heat pump system, which comprises the following operation processes:
in the summer refrigeration working condition, the four-way reversing valve 4 acts, the solar energy and air source composite heat pump system is switched to the refrigeration state (as shown by a solid arrow in figure 1), and a low-temperature and low-pressure refrigerant enters the indoor heat exchanger 1 to exchange heat with indoor air, absorbs heat and evaporates to become gas. In the evaporation and heat absorption process, a sensor in the indoor heat exchanger 1 monitors indoor air quality and indoor temperature and humidity in real time, the opening degree of a fresh air valve and the rotating speed of an indoor fan 1-13 are automatically adjusted, and condensed water in the evaporation process flows into a condensed water receiving disc 1-7 of the heat exchanger through a smooth wall surface, so that the floor is prevented from being wetted. After evaporation and heat absorption are completed, low-temperature low-pressure refrigerant gas enters the compressor 6 and is compressed to high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas enters the outdoor heat exchanger 2, the high-temperature high-pressure refrigerant gas exchanges heat with outdoor air, the smooth wall surface of the outdoor heat exchanger 2 is beneficial to the outdoor heat exchanger to radiate through the sky at night and radiate heat to the environment, under the combined action of forced heat exchange and sky radiation, the high-temperature high-pressure refrigerant gas is condensed into high-temperature high-pressure refrigerant liquid, the high-temperature high-pressure refrigerant liquid passes through the throttle valve 3 and then becomes low-temperature low-pressure gas-liquid mixture, the low-temperature low-pressure gas-liquid mixture enters the indoor heat exchanger 1 again, and the circulation is carried out so as to carry out refrigeration. When outdoor temperature is higher in summer and the heat dissipation capacity of the outdoor heat exchanger is poor, at the moment, the indoor heat exchanger contains the cold accumulation medium, and the cold accumulation medium can absorb and store the cold energy of the refrigerant, so that the indoor cold energy can be effectively guaranteed, the indoor comfort is improved, in addition, the existence of the cold accumulation medium can prolong the indoor temperature maintenance time after the system is shut down, and the effect of electric power peak clipping and valley filling is also achieved to a certain extent.
In winter, the four-way reversing valve 4 acts, the solar energy and air source composite heat pump system is switched to a heat supply state (as shown by an open arrow in figure 1), high-temperature and high-pressure gaseous refrigerant from the compressor 6 enters the indoor heat exchanger 1, and exchanges heat with a room through forced convection and radiation. In the condensation and heat release process, the heat storage medium stores a part of heat, the temperature of a human body activity area and the change of the carbon dioxide concentration are measured through a carbon dioxide concentration sensor in the indoor heat exchanger 1, and the rotating speed of a fresh air valve and the rotating speed of the indoor fan 1-13 are adjusted. The high-temperature high-pressure liquid refrigerant from the indoor heat exchanger 1 is changed into low-temperature low-pressure gas-liquid mixed refrigerant through the throttle valve 3, and enters the outdoor heat exchanger 2 to absorb heat and evaporate. In the evaporation heat absorption process, the absorption of solar heat energy is increased through a heat absorption coating on the surface of the outdoor heat exchanger 2 and a reflecting plate 2-1 arranged behind the heat absorption coating, and meanwhile, the heat exchange between the outdoor heat exchanger 2 and outdoor air is enhanced through an outdoor fan 2-5. The evaporated refrigerant gas enters the compressor 6 and then enters the indoor heat exchanger 1, and the circulation is performed, so that heating is performed. When the defrosting work condition is performed in winter, the four-way reversing valve 4 acts to switch the solar energy and air source composite heat pump system to the refrigerating state again, and at the moment, the system absorbs heat stored in the heat storage medium in the indoor heat exchanger 1 in the heating state, so that the refrigerant absorbs heat and evaporates to enter the outdoor heat exchanger 2 to release heat and defrost. When the outdoor heat exchanger 2 has no frost layer, the four-way reversing valve 4 is reversed again, and the solar energy and air source composite heat pump system is switched to a heating state again to supply heat.
The indoor/outdoor heat exchanger structure and the flow channel arrangement thereof are shown in fig. 2 to 18, the heat storage medium in the indoor heat exchanger is selected by comprehensively considering the factors of heat transfer performance, economy, corrosivity and the like, and the selectable materials include but are not limited to water, heat transfer oil, various chemical phase change heat storage materials and the like; the heat absorbing coating of the outdoor heat exchanger is selected by comprehensively considering factors such as absorptivity, reflectivity, throw ratio, economy, safety and corrosiveness, and the like, and the optional coating comprises but is not limited to a black chromium coating, a black cobalt coating, an aluminum anode oxidation coating, other transition metal composite oxide coatings and the like.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a compound heat pump system in domestic small-size solar energy air source, includes indoor heat exchanger, choke valve, outdoor heat exchanger, four-way reversing valve, vapour and liquid separator and compressor, its characterized in that: the indoor heat exchanger and the outdoor heat exchanger are both parallel flow micro-channel heat exchangers,
the parallel flow microchannel heat exchanger comprises a shell and a plurality of heat exchange modules which are arranged in parallel and are positioned in the shell, wherein each heat exchange module comprises a heat exchange shell, a plurality of rows of parallel flow microchannels arranged in the heat exchange shell and fins arranged among the parallel flow microchannels; the upper end and the lower end of the shell are respectively provided with an air outlet module and an air inlet module, and air enters the body from the air inlet module to exchange heat with the heat exchange module and is discharged through the air outlet module;
in the indoor heat exchanger, an air inlet module is communicated with outdoor fresh air, and an air outlet module is communicated with the indoor space; in the outdoor heat exchanger, the air inlet module and the air outlet module are both communicated with outdoor air; the surface of the shell of the outdoor heat exchanger is smooth and is provided with a heat absorption coating.
2. The domestic small solar-air source compound heat pump system according to claim 1, characterized in that: in the indoor heat exchanger, the air inlet module comprises a fresh air pipe and a fresh air valve, one end of the fresh air pipe is communicated with outdoor air through the fresh air valve, the other end of the fresh air pipe is communicated with the air inside the body through a notch, and one side, facing a user, of the fresh air pipe is provided with an air inlet fence and an air quality sensor; the heat pump system also controls the opening of the fresh air valve in real time according to the value of the air quality sensor.
3. The domestic small solar-air-source compound heat pump system of claim 2, wherein: in the indoor heat exchanger, the air outlet module comprises an air outlet pipe, an indoor fan and an air outlet fence, and the heat pump system also controls the start and stop of the indoor fan and the rotating speed of the indoor fan in real time according to the value of the air quality sensor.
4. The domestic small solar-air source compound heat pump system according to claim 3, characterized in that: the air quality sensor comprises a temperature and humidity sensor and a carbon dioxide concentration sensor.
5. The domestic small solar-air-source compound heat pump system of claim 1, wherein: in the indoor heat exchanger, the heat exchange module further comprises a cold/heat accumulation medium filled between the heat exchange shell and the parallel flow micro-channel.
6. The domestic small solar-air-source compound heat pump system of claim 1, wherein: indoor heat exchanger is the console mode, and the air-out fence is located the top of air-out pipe, and indoor fan sends the new trend after the heat transfer into indoorly through the air-out fence.
7. The domestic small solar-air-source compound heat pump system of claim 1, wherein: the outdoor heat exchanger is obliquely arranged, an outdoor air inlet fence is arranged on the air inlet module in the outdoor heat exchanger, and an outdoor fan is arranged in the air outlet module.
8. The domestic small solar-air-source compound heat pump system of claim 1, wherein: the outdoor heat exchanger, the throttle valve, the four-way reversing valve, the gas-liquid separator and the compressor are all arranged in the outdoor unit combined supporting shell, a heat absorption coating is arranged on one surface, facing the sun, of the outdoor heat exchanger, a reflecting plate is arranged on the surface, facing away from the sun, of the outdoor heat exchanger, and the reflecting plate is arranged between the outdoor heat exchanger and the compressor.
9. The domestic small solar-air-source compound heat pump system of claim 1, wherein: in the indoor heat exchanger, a condensation water plate is arranged at the bottom of a heat exchange module in the shell.
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| CN202210339791.5A CN114777360A (en) | 2022-04-01 | 2022-04-01 | Household small-sized solar energy and air source composite heat pump system |
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Cited By (1)
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| CN117287760A (en) * | 2023-10-09 | 2023-12-26 | 江苏奥斯康新能源有限公司 | Heat pump heat exchanger with air heat source level heat exchange function |
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Application publication date: 20220722 |