CN106322833A - Cascading ultralow temperature air source heat pump and heating method thereof - Google Patents
Cascading ultralow temperature air source heat pump and heating method thereof Download PDFInfo
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Abstract
The invention discloses a cascading ultralow temperature air source heat pump and a heating method thereof. The cascading ultralow temperature air source heat pump comprises a solar thermal collector, a heat storage water tank, a heat exchanger, a surface air cooler, a condenser, a compressor and a heating tail end. The solar thermal collector, the heat storage water tank and the heat exchanger are sequentially connected in series through pipelines. The surface air cooler is connected with the heat exchanger in parallel, and the inlet and outlet end of the surface air cooler and the inlet and outlet end of the heat exchanger are connected to the condenser. The compressor is connected to the water outlet end of the surface air cooler and the water outlet end of the heat exchanger in series. The condenser is connected to the heating tail end. The heating method of the cascading ultralow temperature air source heat pump includes the cascading heating technology of a solar thermal collector heating system and an air source heat pump heating system, the direct heating supply technology of the solar thermal collector heating system and the direct heating supply technology of the air source heat pump. According to the cascading ultralow temperature air source heat pump and the heating method thereof, low-enthalpy value heat at the environment temperature can be absorbed under the ultralow temperature environment of 20 DEG C and below, heat is increased through the cascading ultralow temperature air source heat pump, and hot water at the temperature of 45 DEG C can be prepared so that heating can be supplied to buildings.
Description
Technical field
The present invention relates to heat field, refer in particular to a kind of superposition type ultra-low temperature air source heat pump and heating method thereof.
Background technology
The air source heat pump heating operation standard condition that standard GB/T/T18430.1-2007 " industry of steam compression cycle cold water (heat pump) unit part 1 or business are used and cold water (heat pump) unit of similar applications ", GB/T18430.2-2007 " steam compression cycle cold water (heat pump) unit part 2 family is used and cold water (heat pump) unit of similar applications " specify is ambient temperature 7 DEG C, producing the hot water of 45 DEG C, minimum ambient temperature to-7 DEG C can be run；The standard condition of the low ring temperature air source heat pump heating operation that standard GB/T/T25127.1-2010 " low ambient temperature air source heat pump (cold water) unit part 1: industry or business are used and heat pump (cold water) unit of similar applications ", GB/T25127.2-2010 " low ambient temperature air source heat pump (cold water) unit part 2: family is used and heat pump (cold water) unit of similar applications " specify is ambient temperature-12 DEG C, producing 41 DEG C of hot water, minimum ambient temperature can be run to when-20 DEG C.But northern area, the ambient temperature in winter is often below-20 DEG C, and the air source heat pump meeting above-mentioned standard cannot run in these areas.
Solar energy, as regenerative resource, is utilized with the form of photo-thermal, opto-electronic conversion, but owing to by season, being affected with rainy weather round the clock, presents discontinuity and instable feature, and the temperature area less than-20 DEG C is rarely used for heating in the winter time.
Area, NORTHWEST CHINA portion winter is cold, day and night temperature is relatively big and solar radiation far above other major part regions of China, applied solar energy heats as above-mentioned area as the superposition type ultra-low-loop temperature air source heat pump of auxiliary thermal source, has extraordinary feasibility and marketing prospect.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, there is provided a kind of can be under less than the ultra-low temperature surroundings of-20 DEG C, absorb the low enthalpy heat of ambient temperature, heat is promoted through superposition type ultra-low-loop temperature air source heat pump, produce the hot water of 45 DEG C, and by superposition type ultra-low temperature air source heat pump that the end such as fan coil or flooring radiation is building heating and heating method thereof.
The technical scheme that the present invention takes is as follows: a kind of superposition type ultra-low temperature air source heat pump, including solar thermal collector, thermal storage water tank, heat exchanger, surface cooler, condenser, compressor and heating end, wherein, above-mentioned solar thermal collector, thermal storage water tank and heat exchanger are connected according to this by pipeline, and thermal storage water tank also and forms fluid circuit between solar thermal collector, between heat exchanger and thermal storage water tank, form fluid circuit；Above-mentioned surface cooler is connected in parallel with heat exchanger, and both in-out ends are connected on condenser, and water side is in series with compressor；Condenser is connected to heat on end by pipeline, and and the formation fluid circuit between end that heats.
Preferably, the outlet conduit between described solar thermal collector and thermal storage water tank is provided with the first water pump；The 3rd water pump and the 3rd electromagnetic valve it is provided with according to this on outlet conduit between thermal storage water tank and heat exchanger.
Preferably, being connected in parallel between described heat exchanger and surface cooler, the inlet pipeline of heat exchanger is provided with the first electromagnetic valve, and the inlet pipeline of surface cooler is provided with the second electromagnetic valve；Above-mentioned compressor is arranged on the outlet pipeline of heat exchanger and surface cooler.
Preferably, the water return pipeline between described condenser and heating end is provided with the 4th electromagnetic valve and the second water pump according to this.
Preferably, described thermal storage water tank is connected on the water return pipeline between condenser and heating end and outlet conduit by pipeline respectively；The pipeline being arranged between thermal storage water tank and above-mentioned outlet conduit is provided with the 4th battery valve；The pipeline being arranged between thermal storage water tank and above-mentioned backwater pipe racks is provided with the 6th electromagnetic valve.
The heating method of a kind of superposition type ultra-low temperature air source heat pump, including solar thermal collector heating with air source heat pump heating overlapping heats technique, solar thermal collector heating directly heats heating process and air source heat pump directly heats heating process.
Preferably, described solar thermal collector heating heats technique with air source heat pump heating overlapping and comprises the following steps:
A1, close the second electromagnetic valve, the 4th electromagnetic valve and the 6th battery valve；
A2, solar thermal collector heating absorb the radiations heat energy of solar radiation, and by the first water pump transmission to thermal storage water tank, hot water is transferred to heat exchanger by the 3rd water pump and the 3rd electromagnetic valve by thermal storage water tank；
After hot water is carried out condensing heat release by A3, heat exchanger, being back in thermal storage water tank by the current that temperature reduces, the current that temperature raises import surface cooler；
Cold-producing medium R404a in A4, surface cooler absorbs the heat through heat exchanger transmission, becomes high temperature and high pressure steam through compressor compresses after evaporation, and high temperature and high pressure steam imports in condenser, and steam transfers heat to use side water in condenser, and transmits to the end that heats；
A5, step A4 use side water be heated to 45 DEG C in condenser, and through heating terminal temperature difference building heating, water temperature in heating end is reduced to 40 DEG C, and 40 DEG C of backwater are back to condenser through the second water pump and the 4th electromagnetic valve.
Preferably, solar heat collector heating system directly heats heating process and comprises the following steps:
B1, open the first water pump, the second water pump, the 4th electromagnetic valve and the 6th electromagnetic valve, meanwhile, close the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve and the 5th electromagnetic valve；
B2, solar thermal collector heating absorb the radiations heat energy of solar radiation, and by the first water pump transmission to thermal storage water tank, hot water is directly imported in heating end by thermal storage water tank by the 4th electromagnetic valve；
The backwater produced in B3, heating end passes through the second water pump and the 6th electromagnetic valve back in thermal storage water tank.
Preferably, air source heat pump directly heats heating process and comprises the following steps:
C1, close the first electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the 6th electromagnetic valve and the 3rd water pump；
Cold-producing medium R404a in C2, surface cooler absorbs the low enthalpy heat of ambient temperature, transmits to compressor after evaporation；
C3, cold-producing medium R404a are compressed into high temperature and high pressure steam in compressor, in high temperature and high pressure steam transmission to condenser, transfer heat to use side water in condenser, use side water temp. heating to 45 DEG C, are delivered to heat end for building heating through piping；
40 DEG C produced in C4, heating end are back in condenser through the second water pump and the 5th electromagnetic valve, with the cold-producing medium R404a in condenser, heat exchange occur, form circulation.
The beneficial effects of the present invention is:
The present invention is directed to prior art and improve innovation, devise a kind of integrated solar heat collector heating and the superposition type ultra-low temperature air source heat pump of air source heat pump heating, be made up of two heating overlappings；Overlapping is carried out by the parallel connection of heat exchanger and condenser between solar thermal collector heating and air source heat pump heating.Generally use solar thermal collector heating and air source heat pump heating overlapping operational mode, solar thermal collector absorbs solar radiation heating thermal storage water tank, and heat is passed to by heat exchanger the cold-producing medium R404a of air source heat pump, high temperature and high pressure steam is become by compressor compresses, and transfer heat to use side water by condenser, final utilization side water water temperature is increased to 45 DEG C, for building heating.When solar irradiation enriches, use solar thermal collector heating direct heating pattern, when solar irradiation deficiency, use air source heat pump heating direct heating pattern；The superposition type ultra-low-loop temperature air source heat pump of the present invention efficiently can heat under the operating mode of-20 DEG C of low temperature.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the schematic diagram that solar thermal collector heating of the present invention and air source heat pump heating overlapping run heating mode.
Fig. 3 is the schematic diagram of solar thermal collector heating direct heating pattern of the present invention.
Fig. 4 is the schematic diagram of air heat source pump direct heating pattern of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figures 1 to 4, the technical scheme that the present invention takes is as follows: a kind of superposition type ultra-low temperature air source heat pump, including solar thermal collector 1, thermal storage water tank 2, heat exchanger 3, surface cooler 4, condenser 5, compressor 6 and heating end 7, wherein, above-mentioned solar thermal collector 1, thermal storage water tank 2 and heat exchanger 3 are connected according to this by pipeline, and thermal storage water tank 2 also and forms fluid circuit between solar thermal collector 1, between heat exchanger 3 and thermal storage water tank 2, form fluid circuit；Above-mentioned surface cooler 4 is connected in parallel with heat exchanger 3, and both in-out ends are connected on condenser 5, and water side is in series with compressor 6；Condenser 5 is connected to heat on end 7 by pipeline, and and the formation fluid circuit between end 7 that heats.
Outlet conduit between solar thermal collector 1 and thermal storage water tank 2 is provided with the first water pump 14；The 3rd water pump 16 and the 3rd electromagnetic valve 10 it is provided with according to this on outlet conduit between thermal storage water tank 2 and heat exchanger 3.
Being connected in parallel between heat exchanger 3 and surface cooler 4, the inlet pipeline of heat exchanger 3 is provided with the first electromagnetic valve 8, and the inlet pipeline of surface cooler 4 is provided with the second electromagnetic valve 9；Above-mentioned compressor 6 is arranged on the outlet pipeline of heat exchanger 3 and surface cooler 4.
The 4th electromagnetic valve 12 and the second water pump 15 it is provided with according to this on water return pipeline between condenser 5 and heating end 7.
Thermal storage water tank 2 is connected on the water return pipeline between condenser 5 and heating end 7 and outlet conduit by pipeline respectively；The pipeline being arranged between thermal storage water tank 2 and above-mentioned outlet conduit is provided with the 4th battery valve 11；The pipeline being arranged between thermal storage water tank 2 and above-mentioned backwater pipe racks is provided with the 6th electromagnetic valve 13.
The heating method of a kind of superposition type ultra-low temperature air source heat pump, including solar thermal collector heating with air source heat pump heating overlapping heats technique, solar thermal collector heating directly heats heating process and air source heat pump directly heats heating process.
Solar thermal collector heating heats technique with air source heat pump heating overlapping and comprises the following steps:
A1, close the second electromagnetic valve the 9, the 4th electromagnetic valve 11 and the 6th battery valve 13；
A2, solar thermal collector heating absorb the radiations heat energy of solar radiation, are transmitted to thermal storage water tank 2 by the first water pump 14, and hot water is transferred to heat exchanger 3 by the 3rd water pump 16 and the 3rd electromagnetic valve 10 by thermal storage water tank 2；
After hot water is carried out condensing heat release by A3, heat exchanger 3, being back in thermal storage water tank 2 by the current that temperature reduces, the current that temperature raises import surface cooler 4；
Cold-producing medium R404a in A4, surface cooler 4 absorbs the heat through heat exchanger 3 transmission, it is compressed into high temperature and high pressure steam through compressor 6 after evaporation, high temperature and high pressure steam imports in condenser 5, and steam transfers heat to use side water in condenser 5, and transmits to heating end 7；
A5, step A4 use side water be heated to 45 DEG C in condenser 5, and through heating end 7 user's building heating, water temperature in heating end 7 is reduced to 40 DEG C, and 40 DEG C of backwater are back to condenser 5 through the second water pump 15 and the 4th electromagnetic valve 12.
Solar heat collector heating system directly heats heating process and comprises the following steps:
B1, open the first water pump the 14, second water pump the 15, the 4th electromagnetic valve 11 and the 6th electromagnetic valve 13, meanwhile, close the first electromagnetic valve the 8, second electromagnetic valve the 9, the 3rd electromagnetic valve 10 and the 5th electromagnetic valve 12；
B2, solar thermal collector heating absorb the radiations heat energy of solar radiation, are transmitted to thermal storage water tank 2 by the first water pump 14, and hot water is directly imported in heating end 7 by thermal storage water tank 2 by the 4th electromagnetic valve 11；
The backwater produced in B3, heating end 7 passes through the second water pump 15 and the 6th electromagnetic valve 13 back in thermal storage water tank 2.
Air source heat pump directly heats heating process and comprises the following steps:
C1, close the first electromagnetic valve the 8, the 3rd electromagnetic valve the 10, the 4th electromagnetic valve the 11, the 6th electromagnetic valve 11 and the 3rd water pump 16；
Cold-producing medium R404a in C2, surface cooler 4 absorbs the low enthalpy heat of ambient temperature, transmits to compressor 6 after evaporation；
C3, cold-producing medium R404a are compressed into high temperature and high pressure steam in compressor 6, high temperature and high pressure steam transmits to condenser 5, transfer heat to use side water in condenser 5, use side water temp. heating to 45 DEG C, be delivered to heat end 7 for building heating through piping；
40 DEG C produced in C4, heating end 7 are back in condenser 5 through the second water pump 15 and the 5th electromagnetic valve 12, with the cold-producing medium R404a in condenser 5, heat exchange occur, form circulation.
Further, as it is shown in figure 1, the present invention includes solar thermal collector heating and air source heat pump heating, it is made up of two heating overlappings.Superposition type ultra-low-loop temperature air source heat pump is made up of solar thermal collector 1, thermal storage water tank 2, heat exchanger 3, surface cooler 4, condenser 5, compressor 6, heating end the 7, first electromagnetic valve the 8, second electromagnetic valve the 9, the 3rd electromagnetic valve the 10, the 4th electromagnetic valve the 11, the 5th electromagnetic valve the 12, the 6th electromagnetic valve the 13, first water pump the 1, second water pump 2；Solar thermal collector 1, thermal storage water tank the 2, the 3rd electromagnetic valve 10, heat exchanger the 3, first water pump 14 are sequentially connected in series by pipeline, form solar thermal collector heating；Compressor 6, surface cooler the 4, second electromagnetic valve 9, condenser 5 are sequentially connected in series by pipeline, form air source heat pump heating；Heat exchanger 3 and surface cooler 4 are in parallel, thus by parallel to solar thermal collector heating and air source heat pump heating, form superposition type ultra-low-loop temperature air source heat pump；Condenser the 5, the 5th electromagnetic valve 12 is connected by pipeline and the second water pump 15 and heating end 7；Thermal storage water tank the 2, the 4th electromagnetic valve the 11, the 6th electromagnetic valve 13 is connected by pipeline and the second water pump 15 and heating end 7.
Carry out the schematic diagram of heating mode as in figure 2 it is shown, run as air source heat pump thermal source overlapping for the solar thermal collector of superposition type ultra-low-loop temperature air source heat pump of the present invention, during operation, close the second electromagnetic valve the 9, the 4th electromagnetic valve 11 and the 6th electromagnetic valve 13；Solar thermal collector heating side: solar thermal collector 1 absorbs solar radiation heat, delivers heat to thermal storage water tank 2 by the first water pump 14；Heat is reached heat exchanger 3 by the 3rd water pump 16 and the 3rd electromagnetic valve 10 by thermal storage water tank 2, through condensation heat release, is back to thermal storage water tank 2；Air source heat pump heating side: cold-producing medium R404a absorbs thermal storage water tank 2 and reaches the heat of surface cooler 4, it is compressed into high temperature and high pressure steam by compressor 6 after evaporation, heat is conducted to use side water by steam through condenser 5, the water temperature using side water is heated to 45 DEG C, through the piping end that is delivered to heat for building heating, 40 DEG C of backwater are back to condenser 5 by the second water pump 15 and the 5th electromagnetic valve 12.
As shown in Figure 3, the schematic diagram of solar thermal collector heating direct heating for the superposition type ultra-low-loop temperature air source heat pump of the present invention, during operation, open first water pump the 14, second water pump the 15, the 4th electromagnetic valve the 11 and the 6th electromagnetic valve 13, close first electromagnetic valve the 8, second electromagnetic valve the 9, the 3rd electromagnetic valve the 10, the 5th electromagnetic valve 12, in water tank, water flows through the 4th electromagnetic valve 11 is heating end heating, and backwater passes through the second water pump 15 and the 6th electromagnetic valve 13 reflow tank.
It is illustrated in figure 4 the schematic diagram of the air source heat pump direct heating of the superposition type ultra-low-loop temperature air source heat pump of the present invention, during operation, closes the 3rd water pump the 16, first electromagnetic valve the 8, the 3rd electromagnetic valve the 10, the 4th electromagnetic valve 11 and the 6th electromagnetic valve 13；Cold-producing medium R404a absorbs the low enthalpy heat of ambient temperature, it is compressed into high temperature and high pressure steam by compressor 6 after evaporation, heat is conducted to use side water by steam through condenser 5, the water temperature using side water is heated to 45 DEG C, through the piping end that is delivered to heat for building heating, 40 DEG C of backwater are back to condenser 5 by the second water pump 15 and the 5th electromagnetic valve 12.
Three kinds of switchover operation conditions heating technique are as follows:
Generally, during solar irradiation abundance, solar thermal collector collection heat storage is in thermal storage water tank, and thermal storage water tank's temperature is consistently higher than tm, now heats using thermal storage water tank's heat accumulation as air source heat pump thermal source.Still starting to second day solar radiation using thermal storage water tank's heat accumulation as air source heat pump thermal source when night is run, now water tank temperature is whole day minimum point t1 of 24 hours, hereafter under solar radiation, gradually heats up.In the case, whole day within 24 hours, all using solar radiation as air source heat pump heating source, run with air source heat pump heating overlapping, and can reach maximum heats efficiency by i.e. solar thermal collector heating.
When solar irradiation enriches, and water the temperature inside the box is higher than tm+n, switch to solar thermal collector heating direct heating.
On daytime, when solar thermal collector heating is run with air source heat pump heating overlapping, if temperature is less than t1 in thermal storage water tank, switch to air source heat pump direct heating pattern；Utilizing solar radiation, thermal storage water tank's temperature gradually rises simultaneously, when rising to tm+n, switches to solar thermal collector heating direct heating pattern；When thermal storage water tank's temperature is reduced to tm, if still there being illumination, then switches to air source heat pump direct heating pattern, so switch, until unglazed photograph, switch to solar thermal collector heating completely and run with air source heat pump heating overlapping.Tm is to meet the heat needed for solar thermal collector heating at night is run with air source heat pump heating overlapping, and tm-t1 is building energy consumption at night, and n is at least to run 30 minutes institute's calorific requirements.
Embodiments of the invention simply introduce its detailed description of the invention, do not lie in and limit its protection domain.The technical staff of the industry may be made that some is revised under the inspiration of the present embodiment, therefore all equivalence changes done according to the scope of the claims of the present invention or modification, belong in scope of the patent claims of the present invention.
Claims (9)
1. a superposition type ultra-low temperature air source heat pump, it is characterized in that: include solar thermal collector (1), thermal storage water tank (2), heat exchanger (3), surface cooler (4), condenser (5), compressor (6) and heating end (7), wherein, above-mentioned solar thermal collector (1), thermal storage water tank (2) and heat exchanger (3) are connected according to this by pipeline, and thermal storage water tank (2) and and solar thermal collector (1) between formed fluid circuit, between heat exchanger (3) and thermal storage water tank (2) formation fluid circuit；Above-mentioned surface cooler (4) is connected in parallel with heat exchanger (3), and both in-out ends are connected on condenser (5), and water side is in series with compressor (6)；Condenser (5) is connected to heat on end (7) by pipeline, and and the formation fluid circuit between end (7) that heats.
A kind of superposition type ultra-low temperature air source heat pump the most according to claim 1, it is characterised in that: the outlet conduit between described solar thermal collector (1) and thermal storage water tank (2) is provided with the first water pump (14)；The 3rd water pump (16) and the 3rd electromagnetic valve (10) it is provided with according to this on outlet conduit between thermal storage water tank (2) and heat exchanger (3).
A kind of superposition type ultra-low temperature air source heat pump the most according to claim 2, it is characterized in that: be connected in parallel between described heat exchanger (3) and surface cooler (4), the inlet pipeline of heat exchanger (3) is provided with the first electromagnetic valve (8), and the inlet pipeline of surface cooler (4) is provided with the second electromagnetic valve (9)；Above-mentioned compressor (6) is arranged on the outlet pipeline of heat exchanger (3) and surface cooler (4).
A kind of superposition type ultra-low temperature air source heat pump the most according to claim 3, it is characterised in that: it is provided with the 4th electromagnetic valve (12) and the second water pump (15) according to this on the water return pipeline between described condenser (5) and heating end (7).
A kind of superposition type ultra-low temperature air source heat pump the most according to claim 4, it is characterised in that: described thermal storage water tank (2) is connected on the water return pipeline between condenser (5) and heating end (7) and outlet conduit by pipeline respectively；The pipeline being arranged between thermal storage water tank (2) and above-mentioned outlet conduit is provided with the 4th battery valve (11)；The pipeline being arranged between thermal storage water tank (2) and above-mentioned backwater pipe racks is provided with the 6th electromagnetic valve (13).
6. the heating method of a superposition type ultra-low temperature air source heat pump as claimed in claim 1, it is characterised in that: include solar thermal collector heating and air source heat pump heating overlapping heats technique, solar thermal collector heating directly heats heating process and air source heat pump directly heats heating process.
The heating method of superposition type ultra-low temperature air source heat pump the most according to claim 6, it is characterised in that described solar thermal collector heating heats technique with air source heat pump heating overlapping and comprises the following steps:
A1, close the second electromagnetic valve (9), the 4th electromagnetic valve (11) and the 6th battery valve (13)；
A2, solar thermal collector heating absorb the radiations heat energy of solar radiation, by the first water pump (14) transmission in thermal storage water tank (2), hot water is transferred to heat exchanger (3) by the 3rd water pump (16) and the 3rd electromagnetic valve (10) by thermal storage water tank (2)；
After hot water is carried out condensing heat release by A3, heat exchanger (3), being back in thermal storage water tank (2) by the current that temperature reduces, the current that temperature raises import surface cooler (4)；
Cold-producing medium R404a in A4, surface cooler (4) absorbs the heat transmitted through heat exchanger (3), it is compressed into high temperature and high pressure steam through compressor (6) after evaporation, high temperature and high pressure steam imports in condenser (5), steam transfers heat to use side water in condenser (5), and transmits to the end that heats (7)；
A5, step A4 use side water be heated to 45 DEG C in condenser (5), and through heating end (7) user's building heating, water temperature in heating end (7) is reduced to 40 DEG C, and 40 DEG C of backwater are back to condenser (5) through the second water pump (15) and the 4th electromagnetic valve (12).
The heating method of superposition type ultra-low temperature air source heat pump the most according to claim 6, it is characterised in that solar heat collector heating system directly heats heating process and comprises the following steps:
B1, open the first water pump (14), the second water pump (15), the 4th electromagnetic valve (11) and the 6th electromagnetic valve (13), meanwhile, close the first electromagnetic valve (8), the second electromagnetic valve (9), the 3rd electromagnetic valve (10) and the 5th electromagnetic valve (12)；
B2, solar thermal collector heating absorb the radiations heat energy of solar radiation, and by the first water pump (14) transmission to thermal storage water tank (2), hot water is directly imported in heating end (7) by thermal storage water tank (2) by the 4th electromagnetic valve (11)；
The backwater produced in B3, heating end (7) is interior back to thermal storage water tank (2) by the second water pump (15) and the 6th electromagnetic valve (13).
The heating method of superposition type ultra-low temperature air source heat pump the most according to claim 6, it is characterised in that air source heat pump directly heats heating process and comprises the following steps:
C1, close the first electromagnetic valve (8), the 3rd electromagnetic valve (10), the 4th electromagnetic valve (11), the 6th electromagnetic valve (11) and the 3rd water pump (16)；
Cold-producing medium R404a in C2, surface cooler (4) absorbs the low enthalpy heat of ambient temperature, transmits to compressor (6) after evaporation；
C3, cold-producing medium R404a are compressed into high temperature and high pressure steam in compressor (6), high temperature and high pressure steam transmission is interior to condenser (5), transfer heat to use side water in condenser (5), use side water temp. heating to 45 DEG C, be delivered to heat end (7) for building heating through piping；
40 DEG C produced in C4, heating end (7) are back in condenser (5) through the second water pump (15) and the 5th electromagnetic valve (12), with the cold-producing medium R404a in condenser (5), heat exchange occur, form circulation.
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| CN107314419A (en) * | 2017-08-07 | 2017-11-03 | 宝莲华新能源技术（上海）股份有限公司 | A kind of indoor low temperature cooling system suitable for Household Air-source Heat Pump in Cold Regions heating |
| CN107449027A (en) * | 2017-07-31 | 2017-12-08 | 西安交通大学 | A kind of solar energy couples hot-water heating system with air source heat pump |
| CN108362015A (en) * | 2017-12-05 | 2018-08-03 | 北京石油化工学院 | Solar heat pump and water heating system |
| CN109028571A (en) * | 2018-09-19 | 2018-12-18 | 东莞市正旭新能源设备科技有限公司 | overlapping air source heat pump |
| CN111649504A (en) * | 2020-04-27 | 2020-09-11 | 宁波市海智普智能科技有限公司 | Refrigerant active injection heat pump based on solar energy and control method thereof |
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Application publication date: 20170111 |