CN102563973A - Novel solar air source heat pump system and hot water production method - Google Patents
Novel solar air source heat pump system and hot water production method Download PDFInfo
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- CN102563973A CN102563973A CN2012100191828A CN201210019182A CN102563973A CN 102563973 A CN102563973 A CN 102563973A CN 2012100191828 A CN2012100191828 A CN 2012100191828A CN 201210019182 A CN201210019182 A CN 201210019182A CN 102563973 A CN102563973 A CN 102563973A
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Abstract
The invention relates to a novel solar air source heat pump system and a hot water production method. The system comprises an air source heat pump system which comprises a heating heat pump evaporator, the heating heat pump evaporator is a finned pipe type heat exchanger which comprises an evaporation working medium return pipe, a solar thermal medium return pipe and a plurality of heat exchange fins arranged in sequence, each heat exchange fin comprises a main radiation face, and the main radiation faces of each two adjacent heat exchange fins are opposite. The evaporation working medium return pipe and the solar thermal medium return pipe are in parallel and both penetrate through the heat exchange fins, and the thermal medium in the solar thermal medium return pipe exchanges heat with the evaporation working medium return pipe through the heat exchange fins. Solar energy can be fully used by means of the novel solar air source heat pump system, and efficiency of an air source heat pump is greatly improved.
Description
Technical field
The present invention relates to the building heat supplying heating technology, particularly a kind of heat pump and hot water preparation method that solar energy and air can be combined.
Background technology
Existing solar thermal collection system: relative efficiency is high, low, the technology maturation of cost.Shortcoming: cold region heat-collecting temperature in winter is lower, and the hot water temperature of most of weather is lower than 45 degree, is used to have a bath and heating needs all that electricity is auxilliary to be heated.The water temperature of the best set thermal efficiency of solar thermal collection system is generally in the scope that is not higher than about environment temperature 30 degree.Along with the rising of water temperature, the radiation loss meeting of solar energy heating efficient and system pipeline increases.
Existing air source heat pump: but the air source heat pump heat supply heating, but also cooling, the region efficient not too low at temperature is high, is very energy-conservation equipment.But the disadvantage of existing air source heat pump be in the low-temperature cold region, high humility area is prone to frosting; Make the heat exchange efficiency of evaporator with heat pump sharply descend; Need to rerun after the defrost, so power consumption greatly, this also is that air source heat pump is difficult in a large amount of reasons of using of cold region.Simultaneously winter of high humidity region also owing to be prone to freeze and make the air source heat pump inefficiency.
How to utilize solar energy to improve the air source heat pump heating efficiency,, become the important topic that this area is studied with the efficient utilization that realizes solar energy simultaneously and the high-performance of air source heat pump.The system that at present solar energy heating is combined with air source heat pump mainly contains systems such as parallel running mode, air preheat mode, direct-expansion type.Parallel running is meant that heat pump water supply temperature after user's heat utilization reduces; Behind solar thermal collector, get into the heat pump water return outlet again; Therefore when the return water temperature of system is higher, behind the hot water entering solar thermal collector, the efficient of heat collector can be very low even possibly becomes radiator; This system in fact winter most of time can't effectively utilize solar energy, be not energy-conservation.The air preheat mode is to install heat exchanger additional in the evaporimeter outside of air source heat pump; Air through this heat exchanger with the heat absorption preheating of solar water after again through evaporator, its shortcoming is because the raising of windage increases the blower fan power consumption, temperature degree outside air then might the temperature after evaporator be higher than through the temperature height behind the heat exchanger; Lose the original function of the heat pump of air source heat energy utilization; Wasted the part energy, through the low device frosting that then might be able to not avoid evaporating of the temperature behind the heat exchanger, can not be by the effective defrost of solar energy; Must use traditional defrost mode, make the comprehensive COP (Energy Efficiency Ratio) of system not maximize.Direct-expansion type has then limited the area that solar energy utilizes, and is easy to generate unfavorable factors such as extra fault and maintenance cost raising.
Summary of the invention
The present invention is directed to existing solar thermal collection system, air source heat pump and with the variety of issue that exists in solar energy heating and the system that air source heat pump combines; A kind of novel solar air source heat pumps system is provided; This system can realize making full use of of solar energy, and has greatly improved the efficient of air source heat pump.The invention still further relates to a kind of hot water preparation method.
Technical scheme of the present invention is following:
A kind of solar air source heat pumps system; Comprise air source heat pump system; Said air source heat pump system comprises and heats evaporator with heat pump; It is characterized in that the said evaporator with heat pump that heats is a fin-tube type heat exchanger, said fin-tube type heat exchanger comprises evaporation working medium loop pipe, solar heat medium loop pipe and several heat exchange fins of arranging in order; Said heat exchange fin comprises main radiating surface; The main radiating surface of said two adjacent heat exchange fins is oppositely arranged, and said evaporation working medium loop pipe and solar heat medium loop pipe are parallel to each other and all run through each heat exchange fin, and the thermal medium in the said solar heat medium loop pipe carries out heat exchange through heat exchange fin to evaporation working medium loop pipe.
Said solar heat medium loop pipe is arranged on the dead ahead, the upper reaches of the downwind of evaporation working medium loop pipe.
Said evaporation working medium loop pipe is two and above laterally arranging, identical with evaporation working medium loop pipe and the corresponding successively dead ahead, the upper reaches that is arranged on the downwind of evaporation working medium loop pipe of the radical of said solar heat medium loop pipe.
Distance between the evaporation working medium loop pipe of said solar heat medium loop Guan Yuqi correspondence is 0～10 millimeter.
Also comprise solar thermal collection system; Said solar thermal collection system comprises solar thermal collector, first heat storage water tank and three groups of loops; Said three groups of loops are respectively thermal-arrest loop, evaporator with heat pump heat-exchanging loop and use hot-water return; Said thermal-arrest loop connects the solar thermal collector and first heat storage water tank respectively; Said evaporator with heat pump heat-exchanging loop connects the solar heat medium loop pipe and first heat storage water tank that heats in the evaporator with heat pump respectively, and the water of the said use hot-water return and first heat storage water tank is used for hot water.
Said thermal-arrest loop is closed or communicates with first heat storage water tank, and said evaporator with heat pump heat-exchanging loop is closed or communicates with first heat storage water tank.
Said solar thermal collector is flat type solar heat collector or electron tubes type solar thermal collector; Or said solar thermal collection system is the heating system of photovoltaic co-generation unit, and said solar thermal collector is a combined heat and power assembly.
The hot water of said air source heat pump system preparation is directly exported for using or behind the second heat storage water tank heat accumulation, exporting hot water for use.
Also comprise the control system; Said control system links to each other with solar thermal collection system with air source heat pump system respectively; When the solar heat coolant-temperature gage of the use hot-water return in the solar thermal collection system was higher than hot water use design temperature, air source heat pump system was out of service; When the solar heat coolant-temperature gage is lower than hot water and uses design temperature, the air source heat pump system operation, and through to the loop intermittent duty defrost in the solar heat medium loop pipe that heats the evaporator with heat pump heat exchange.
A kind of hot water preparation method; Solar energy heating is combined with air source heat pump; It is characterized in that; This method is that the solar heat medium loop pipe in the solar energy heating is arranged at heating in the evaporator with heat pump in the air source heat pump; And said solar heat medium loop pipe is set is parallel to each other and all runs through several heat exchange fins that are arranged side by side successively that heat in the evaporator with heat pump with heating evaporation working medium loop pipe in the evaporator with heat pump, so that the thermal medium in the solar heat medium loop pipe carries out heat exchange through heat exchange fin to evaporation working medium loop pipe.
The radical that solar heat medium loop pipe is set is identical with evaporation working medium loop pipe and solar heat medium loop pipe is arranged on the dead ahead of the downwind of evaporation working medium loop pipe.
Heating system through flat type solar heat collector or electron tubes type solar thermal collector or employing photovoltaic co-generation unit carries out solar energy heating.
When the solar heat coolant-temperature gage of the use hot-water return in the solar energy heating was higher than hot water use design temperature, air source heat pump was out of service; When the solar heat coolant-temperature gage is lower than hot water and uses design temperature, the air source heat pump operation, and through to the loop intermittent duty defrost in the solar heat medium loop pipe that heats the evaporator with heat pump heat exchange.
Technique effect of the present invention is following:
The solar air source heat pumps system that the present invention relates to; Comprise air source heat pump system; The evaporator with heat pump that heats in this air source heat pump system is a fin-tube type heat exchanger, and fin-tube type heat exchanger comprises evaporation working medium loop pipe, solar heat medium loop pipe and several heat exchange fins of arranging in order, through the next door in evaporation working medium loop pipe parallel with it solar heat medium loop pipe is set; And evaporation working medium loop pipe and solar heat medium loop Guan Jun run through each heat exchange fin; Make the thermal medium in the solar heat medium loop pipe carry out heat exchange to evaporation working medium loop pipe through heat exchange fin, thus carry out effective defrost and prevention air source heat pump system heat the evaporator with heat pump frosting, solar energy heating is effectively combined with air source heat pump; Avoided the waste of the energy; Realize making full use of of solar energy, improved the evaporating temperature that heats evaporator with heat pump, thereby greatly improved the efficient of air source heat pump.
Solar heat medium loop pipe is arranged on the dead ahead, the upper reaches of the downwind of evaporation working medium loop pipe; Be that solar heat medium loop pipe is in the setting of inlet air side; Reduce windage on the one hand, save fan energy consumption, can also further improve the evaporating temperature of the evaporation working medium loop pipe that heats in the evaporator with heat pump; Improve the efficient of air source heat pump system, the evaporation working medium loop pipe evaporation that further impels airborne energy to be heated in the evaporator with heat pump absorbs.
The distance that is provided with between the corresponding evaporation working medium loop pipe of solar heat medium loop Guan Yuqi is 0～10 millimeter; Thermal medium in the solar heat medium loop pipe can farthest reduce thermal resistance at this moment, directly or through heat exchange fin indirectly evaporation working medium loop pipe is carried out heat exchange.
Solar thermal collector in the solar thermal collection system adopts flat type solar heat collector or electron tubes type solar thermal collector; Preferably heat pipe type heat collector utilizes the heat pipe effect to carry out thermal-arrest; And the heating system that adopts the photovoltaic co-generation unit, because heat pump is not high to the solar energy heating temperature requirement, this heat-collecting temperature gets final product with interior at the twenty or thirty degree; Therefore the collecting efficiency of solar thermal collection system is high, and has good bearing capacity.
The control system is set in the solar air source heat pumps system, can effectively utilizes solar energy, when solar energy is sufficient; Air source heat pump system is out of service; Only move solar thermal collection system, can reach making full use of of solar thermal collection system, when the time in winter and solar energy deficiency; The air source heat pump system operation; And through to the loop intermittent duty defrost in the solar heat medium loop pipe that heats the evaporator with heat pump heat exchange, what unnecessary heat directly was used for air source heat pump system heats evaporator with heat pump evaporation heat absorption, farthest to improve the efficient of air source heat pump.The control system also can be through the flow of control solar heat medium loop, makes that the air themperature after air is through the evaporator with heat pump heat absorption when heat pump normally moves is lower than ambient air temperature, guarantees the operation of solar air source heat pumps energy saving of system.
The hot water preparation method that the present invention relates to; Solar energy heating is combined with air source heat pump; Solar heat medium loop pipe in the solar energy heating is arranged at heating in the evaporator with heat pump in the air source heat pump; And said solar heat medium loop pipe is set and heats evaporation working medium loop pipe in the evaporator with heat pump and be parallel to each other and all run through several heat exchange fins that are arranged side by side successively that heat in the evaporator with heat pump; So that the thermal medium in the solar heat medium loop pipe carries out heat exchange through heat exchange fin to evaporation working medium loop pipe; Played this effect through this heat exchange to heating the evaporator with heat pump defrost and preventing its frosting, and the unnecessary heat of solar energy heating can directly be used for air source heat pump system heat evaporator with heat pump evaporation heat absorption, to improve the efficient of air source heat pump to greatest extent.
Description of drawings
Fig. 1 is the structural representation that heats evaporator with heat pump in the solar air source heat pumps of the present invention system.
Fig. 2 is the preferred structure sketch map that heats evaporator with heat pump in the solar air source heat pumps of the present invention system.
Fig. 3 is the side structure sketch map of Fig. 2.
Fig. 4 is first kind of preferred structure sketch map of solar air source heat pumps of the present invention system.
Fig. 5 is second kind of preferred structure sketch map of solar air source heat pumps of the present invention system.
Fig. 6 is the third preferred structure sketch map of solar air source heat pumps of the present invention system.
Fig. 7 is the 4th kind of preferred structure sketch map of solar air source heat pumps of the present invention system.
Each label is listed as follows among the figure:
1-evaporation working medium loop pipe; 2-solar heat medium loop pipe; The 3-heat exchange fin; The 4-solar thermal collector; The 5-combined heat and power assembly; 6-thermal-arrest loop; 7-evaporator with heat pump heat-exchanging loop; 8-uses hot-water return.
The specific embodiment
The present invention will be described below in conjunction with accompanying drawing.
The present invention relates to a kind of solar air source heat pumps system, comprise air source heat pump system, air source heat pump system comprises and heats evaporator with heat pump; This heats evaporator with heat pump is fin-tube type heat exchanger; Its structure is as shown in Figure 1, comprises evaporation working medium loop pipe 1, solar heat medium loop pipe 2 and several heat exchange fins of arranging in order 3, and each heat exchange fin 3 comprises main radiating surface; The main radiating surface of two adjacent heat exchange fins 3 is oppositely arranged; Preferred each main radiating surface is parallel to each other, and Fig. 1 is a front view, so only shown a heat exchange fin 3; Evaporation working medium loop pipe 1 is parallel to each other with solar heat medium loop pipe 2 and all runs through each heat exchange fin 3, and the thermal medium in the solar heat medium loop pipe 2 carries out heat exchange through 3 pairs of evaporations of heat exchange fin working medium loop pipe 1.
Fig. 2 and Fig. 3 are respectively front and the side structure sketch map that preferably heats evaporator with heat pump, and among this embodiment, the direction of arrow is wind direction, and solar heat medium loop pipe 2 is arranged on the dead ahead, the upper reaches of the downwind of evaporation working medium loop pipe 1.Medium in the solar heat medium loop pipe 2 can be water or anti-icing fluid etc.Evaporation working medium loop pipe 1 and solar heat medium loop pipe 2 can be all run through each heat exchange fin 3 from the main radiating surface of heat exchange fin 3; The distance of the evaporation working medium loop pipe that solar heat medium loop pipe 2 is corresponding with it is more little good more; The distance that preferably is provided with between the solar heat medium loop pipe 2 evaporation working medium loop pipe 1 corresponding with it is 0～10 millimeter, and the thermal medium in this moment solar heat medium loop pipe 2 can farthest directly or through heat exchange fin 3 carry out heat exchange to evaporating working medium loop pipe 1 indirectly.Evaporation working medium loop pipe 1 among this embodiment is one; Certainly; Evaporation working medium loop pipe 1 also can be set to more than two or two; The radical of solar heat medium loop pipe 2 is identical with evaporation working medium loop pipe 1 at this moment, and each solar heat medium loop pipe 2 is successively set on the dead ahead of the downwind of each self-corresponding evaporation working medium loop pipe 1.
Air source heat pump system in the solar air source heat pumps of the present invention system; Except comprising above-mentioned heating the evaporator with heat pump, have the core component identical, like compressor, condenser and expansion valve etc. with the internal structure of existing air source heat pump system; Liquid refrigerants gets into behind expansion valve and heats evaporator with heat pump; Suddenly descend owing to heat the pressure of evaporator with heat pump, therefore liquid refrigerant evaporates rapidly once more and becomes gaseous state, and absorbs great amount of heat in the air; After compressor compresses the low-temp low-pressure refrigerant that refluxes; The gas that becomes HTHP is discharged, and the cold media gas of HTHP is through the condenser condenses heat release, and the heat of release uses for hot water after conducting to water tank.
Solar air source heat pumps of the present invention system; Except that comprising air source heat pump system; Also comprise solar thermal collection system; First kind of preferred structure sketch map of solar air source heat pumps system as shown in Figure 4; Solar thermal collection system comprises solar thermal collector 4, first heat storage water tank and three groups of loops, and said three groups of loops are respectively thermal-arrest loop 6, evaporator with heat pump heat-exchanging loop 7 and use hot-water return 8, and thermal-arrest loop 6 connects the solar thermal collector 4 and first heat storage water tank respectively; Evaporator with heat pump heat-exchanging loop 7 connects the solar heat medium loop pipe 2 and first heat storage water tank that heats in the evaporator with heat pump respectively, uses the water of the hot-water return 8 and first heat storage water tank to use for hot water.Thermal-arrest loop 6 among this embodiment is closed, this thermal-arrest loop 6 also can be set communicate with first heat storage water tank, can leak water in the thermal-arrest loop 6 or anti-icing fluid; Evaporator with heat pump heat-exchanging loop 7 communicates with first heat storage water tank, evaporator with heat pump heat-exchanging loop 7 also can be set for closed, can leak water in the evaporator with heat pump heat-exchanging loop 7 or anti-icing fluid.
Solar thermal collector 4 preferably is set to flat type solar heat collector or electron tubes type solar thermal collector.When solar thermal collector 4 is flat type solar heat collector; Can adopt metal material through extruding or stamping forming flat-plate heat pipe with two via-hole array slab constructions that are arranged side by side more than reaching; Filling liquid working medium and with the encapsulation of flat-plate heat pipe sealed at both ends in the through hole, flat-plate heat pipe has flat plate frame, and the end that its surface area is bigger can be used as the setting of heat absorbing part forward sunlight; Flat-plate heat pipe is as the evaporation gasification of the heat absorption of the liquid working substance in the evaporator section of heat absorbing part back; Naturally flow to condensation segment, condensation segment heat release liquefaction also relies on gravity or capillary force effect to flow back to evaporator section, accomplishes circulation automatically.Wherein, the water of passing to first heat storage water tank during condensation segment condensation heat release of flat-plate heat pipe through heat-conducting mode through the thermal-arrest loop makes hot water to carry out thermal-arrest.The heat absorbing part arranged outside of flat-plate heat pipe can have light-absorbing coating; The some little fin or the microflute of augmentation of heat transfer effect can also be set in the flat-plate heat pipe.Flat-plate heat pipe can carry out the transmission of heat through the mode that fits with thermal-arrest loop 6, adds fluid working substance and seals if flat-plate heat pipe and thermal-arrest loop integral body are vacuumized the back, then also can be regarded as heat pipe of flat-plate heat pipe and fluid circuit integral body formation.Certainly flat type solar heat collector also can be employed in the interconnective micropore nest of tubes of processing through welding procedure in the flat-plate collector framework; In the plate frame after application of vacuum filling liquid working medium; Liquid working substance is evenly distributed on each independently in the micropore pipeline, naturally formation heat pipe effect.When solar thermal collector 4 is the electron tubes type solar thermal collector; This electron tubes type solar thermal collector comprises support and is fixed on one group of transparent glass pipe with vacuum interlayer on the support; In transparent glass pipe intermediary canal, be provided with flat-plate heat pipe; Be provided with through hole in the flat-plate heat pipe, can working medium and sealed at both ends form heat pipe structure in the through hole.
Fig. 5 is second kind of preferred structure sketch map of solar air source heat pumps of the present invention system.Set up second heat storage water tank among this embodiment; In the air source heat pump system heat evaporator with heat pump heat absorption after; Refrigerant is through the heat release of compressor to condenser condenses; Heat conducts to second heat storage water tank, and output hot water is for use behind the second heat storage water tank heat accumulation, and it is more constant that this structure offers user's hot water temperature.
Fig. 6 is the third preferred structure sketch map of solar air source heat pumps of the present invention system.Solar thermal collection system among this embodiment is the heating system (PV/T) of photovoltaic co-generation unit; Specifically can adopt the heating system of low-grade fever tubular type photovoltaic co-generation unit; This moment, solar thermal collector was a combined heat and power assembly 5; Such as; Combined heat and power assembly adopts one or more flat-plate heat pipe, and front face and the whole back plate that this solar photovoltaic cell panel directly or indirectly is close to and is covered to the solar photovoltaic cell panel backboard of the forward and backward plate face of flat-plate heat pipe is set, the thermal-arrest loop 6 of this moment be band-tube type heat exchanger and with flat-plate heat pipe after the radiating segment applying of plate face.
Fig. 7 is the 4th kind of preferred structure sketch map of solar air source heat pumps of the present invention system.Solar thermal collection system among this embodiment is still identical with structure shown in Figure 6; Heating system (PV/T) for the photovoltaic co-generation unit; Difference is; Structure shown in Figure 6 has been Duoed second heat storage water tank than structure shown in Figure 7; Evaporator with heat pump heat-exchanging loop 7 among Fig. 6 connects the solar heat medium loop pipe 2 and first heat storage water tank that heats in the evaporator with heat pump respectively, and the evaporator with heat pump heat-exchanging loop 7 in the structure shown in Figure 7 does not flow back to first heat storage water tank after first heat storage water tank and 2 heat exchange of solar heat medium loop pipe, but is connected directly to the combined heat and power assembly 5 as solar thermal collector; This moment loop stream return the temperature of combined heat and power assembly 5 will be lower, so just can further improve the collecting efficiency of combined heat and power assembly 5.Also can heat exchanger be set playing the effect of loop cooling from the loop of air source heat pump system to the first heat storage water tank, thereby improve the collecting efficiency of solar thermal collector at the evaporator with heat pump heat-exchanging loop 7 of structure shown in Fig. 4-6.
In the solar air source heat pumps system of the related solar air source heat pumps system of Fig. 1 to Fig. 7 or other structure involved in the present invention during in work; Preferably adopt the control system to control; Be that solar air source heat pumps of the present invention system also comprises the control system; This control system links to each other with solar thermal collection system with air source heat pump system respectively; When the solar heat coolant-temperature gage of the use hot-water return in the solar thermal collection system was higher than hot water use design temperature, air source heat pump system was out of service; When the solar heat coolant-temperature gage is lower than hot water use design temperature; The air source heat pump system operation; Move control model and comprise this moment: through the loop in the solar heat medium loop pipe that heats the evaporator with heat pump heat exchange (or being called the solar heat medium loop) intermittent duty defrost (like fixed time interval operation defrost); Be that the defrost time is according to heating the decision of evaporator with heat pump table temperature or frost thickness the running time of solar heat medium loop; Air source heat pump system can move continuously in the defrost time, also can be out of service.If in the defrost time air source heat pump system out of service after, then surpass more than the freezing point temperature afterwards that air source heat pump system heats unlatching heating evaporator with heat pump table temperature.
The solar air source heat pumps system that the present invention relates to; Through solar thermal collection system to heating the preferential efficient defrost of evaporator with heat pump; And will more than heat directly be used to heat evaporator with heat pump evaporation heat absorption; The maximum use that realizes solar energy reaches the efficient that improves air source heat pump system to greatest extent, and this system of the present invention can be effective to building and heating and hot-water heating system.(for building and heating; Owing to only utilize solar energy to be difficult to satisfy the demand; Best bet is to utilize solar source; Carry out heat exchange to heating evaporator with heat pump, perhaps minimum assurance heats the defrost of evaporator with heat pump and the frosting that inhibition heats evaporator with heat pump, improves the efficient of air source heat pump system to greatest extent.) the present invention's solar heat when winter and solar energy are not enough also can make full use of, and improves the COP of air source heat pump through the evaporating temperature that improves air source heat pump system, also can be through the COP of solar heat anti-defrosting raising air source heat pump.
The invention still further relates to a kind of hot water preparation method that solar energy heating is combined with air source heat pump; This method is that the solar heat medium loop pipe in the solar energy heating is arranged at heating in the evaporator with heat pump in the air source heat pump; And said solar heat medium loop pipe is set is parallel to each other and all runs through several heat exchange fins that are arranged side by side successively that heat in the evaporator with heat pump with heating evaporation working medium loop pipe in the evaporator with heat pump, so that the thermal medium in the solar heat medium loop pipe carries out heat exchange through heat exchange fin to evaporation working medium loop pipe.Preferably, the main heat exchange face of each adjacent heat exchange fin is oppositely arranged and is parallel to each other.
Said method preferably is arranged on solar heat medium loop pipe the dead ahead, the upper reaches of the downwind of evaporation working medium loop pipe, to improve the evaporating temperature that heats evaporator with heat pump of air source heat pump, improves the efficient of air source heat pump.The distance that can be provided with between the corresponding evaporation working medium loop pipe of solar heat medium loop Guan Yuqi is 0～10 millimeter, makes that the thermal medium in the solar heat medium loop pipe can farthest reduce thermal resistance.Also can be provided with many to solar heat medium loop pipe and evaporation working medium loop pipe; The radical of solar heat medium loop pipe is identical with evaporation working medium loop pipe, and each solar heat medium loop Guan Jun is arranged on the dead ahead of the downwind of the evaporation working medium loop pipe corresponding with it.This method can adopt flat type solar heat collector or electron tubes type solar thermal collector or adopt the heating system (like the heating system of low-grade fever tubular type photovoltaic co-generation unit) of photovoltaic co-generation unit to carry out solar energy heating.
In hot water preparation method of the present invention, the operation strategy can be set, when the solar heat coolant-temperature gage of the use hot-water return in the solar energy heating was higher than hot water use design temperature, air source heat pump was out of service; When the solar heat coolant-temperature gage is lower than hot water use design temperature; The air source heat pump operation; According to the operation control model that heats this method of evaporator with heat pump table temperature or frost thickness decision, and through to the loop in the solar heat medium loop pipe that heats the evaporator with heat pump heat exchange (or being called the solar heat medium loop) intermittent duty defrost.
Should be pointed out that the above specific embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore; Although this specification has carried out detailed explanation with reference to accompanying drawing and embodiment to the invention,, those skilled in the art are to be understood that; Still can make amendment or be equal to replacement the invention; In a word, all do not break away from the technical scheme and the improvement thereof of the spirit and the scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (13)
1. solar air source heat pumps system; Comprise air source heat pump system; Said air source heat pump system comprises and heats evaporator with heat pump; It is characterized in that the said evaporator with heat pump that heats is a fin-tube type heat exchanger, said fin-tube type heat exchanger comprises evaporation working medium loop pipe, solar heat medium loop pipe and several heat exchange fins of arranging in order; Said heat exchange fin comprises main radiating surface; The main radiating surface of said two adjacent heat exchange fins is oppositely arranged, and said evaporation working medium loop pipe and solar heat medium loop pipe are parallel to each other and all run through each heat exchange fin, and the thermal medium in the said solar heat medium loop pipe carries out heat exchange through heat exchange fin to evaporation working medium loop pipe.
2. solar air source heat pumps according to claim 1 system is characterized in that, said solar heat medium loop pipe is arranged on the dead ahead, the upper reaches of the downwind of evaporation working medium loop pipe.
3. solar air source heat pumps according to claim 1 system; It is characterized in that; Said evaporation working medium loop pipe is two and above laterally arranging, identical with evaporation working medium loop pipe and the corresponding successively dead ahead, the upper reaches that is arranged on the downwind of evaporation working medium loop pipe of the radical of said solar heat medium loop pipe.
4. solar air source heat pumps according to claim 1 system is characterized in that, the distance between the corresponding evaporation working medium loop pipe of said solar heat medium loop Guan Yuqi is 0～10 millimeter.
5. according to the described solar air source heat pumps of one of claim 1 to 4 system; It is characterized in that; Also comprise solar thermal collection system; Said solar thermal collection system comprises solar thermal collector, first heat storage water tank and three groups of loops, and said three groups of loops are respectively thermal-arrest loop, evaporator with heat pump heat-exchanging loop and use hot-water return, and said thermal-arrest loop connects the solar thermal collector and first heat storage water tank respectively; Said evaporator with heat pump heat-exchanging loop connects the solar heat medium loop pipe and first heat storage water tank that heats in the evaporator with heat pump respectively, and the water of the said use hot-water return and first heat storage water tank is used for hot water.
6. solar air source heat pumps according to claim 5 system is characterized in that, said thermal-arrest loop is closed or communicates with first heat storage water tank, and said evaporator with heat pump heat-exchanging loop is closed or communicates with first heat storage water tank.
7. solar air source heat pumps according to claim 5 system is characterized in that said solar thermal collector is flat type solar heat collector or electron tubes type solar thermal collector; Or said solar thermal collection system is the heating system of photovoltaic co-generation unit, and said solar thermal collector is a combined heat and power assembly.
8. solar air source heat pumps according to claim 5 system is characterized in that, the hot water of said air source heat pump system preparation directly export for use or behind the second heat storage water tank heat accumulation and exported hot water for use.
9. solar air source heat pumps according to claim 5 system; It is characterized in that; Also comprise the control system; Said control system links to each other with solar thermal collection system with air source heat pump system respectively, and when the solar heat coolant-temperature gage of the use hot-water return in the solar thermal collection system was higher than hot water and uses design temperature, air source heat pump system was out of service; When the solar heat coolant-temperature gage is lower than hot water and uses design temperature, the air source heat pump system operation, and through to the loop intermittent duty defrost in the solar heat medium loop pipe that heats the evaporator with heat pump heat exchange.
10. hot water preparation method; Solar energy heating is combined with air source heat pump; It is characterized in that; This method is that the solar heat medium loop pipe in the solar energy heating is arranged at heating in the evaporator with heat pump in the air source heat pump; And said solar heat medium loop pipe is set is parallel to each other and all runs through several heat exchange fins that are arranged side by side successively that heat in the evaporator with heat pump with heating evaporation working medium loop pipe in the evaporator with heat pump, so that the thermal medium in the solar heat medium loop pipe carries out heat exchange through heat exchange fin to evaporation working medium loop pipe.
11. hot water preparation method according to claim 10 is characterized in that, the radical that solar heat medium loop pipe is set is identical with evaporation working medium loop pipe and solar heat medium loop pipe is arranged on the dead ahead of the downwind of evaporation working medium loop pipe.
12. hot water preparation method according to claim 10 is characterized in that, through flat type solar heat collector or electron tubes type solar thermal collector or adopt the heating system of photovoltaic co-generation unit to carry out solar energy heating.
13., it is characterized in that when the solar heat coolant-temperature gage of the use hot-water return in the solar energy heating was higher than hot water use design temperature, air source heat pump was out of service according to claim 10 or 11 or 12 described hot water preparation methods; When the solar heat coolant-temperature gage is lower than hot water and uses design temperature, the air source heat pump operation, and through to the loop intermittent duty defrost in the solar heat medium loop pipe that heats the evaporator with heat pump heat exchange.
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