CN205897607U - Novel solar energy refrigerator - Google Patents

Abstract

The utility model relates to a novel solar energy refrigerator. Including refrigerator box, solar photovoltaic power unit, dc -inverter compressor, first condenser, capillary, first evaporimeter, adsorption bed, second condenser, control valve, liquid storage pot, second evaporimeter, wherein solar photovoltaic power unit includes photovoltaic cell and controller, the photovoltaic cell surface covering has by selective reflection membrane and the compound spectral selectivity combined material layer of making of selectivity emitting film, photovoltaic cell and adsorption bed constitute the composite adsorption bed. The utility model discloses a flat adsorption refrigeration system of solar energy and solar photovoltaic direct current refrigerating system's integration realizes photovoltaic light and heat and uses multipurposely, utilizes the radiant cooling technique further to improve adsorption refrigeration system's refrigeration efficiency to can adopt low -priced non -crystalline silicon photovoltaic cell to realize higher photovoltaic power generation efficiency, show the gross efficiency that has improved solar energy refrigerator.

Description

A kind of novel solar energy refrigerator

Technical field

This utility model belongs to technical field of solar utilization technique and in particular to a kind of solar energy refrigerator, particularly to the sun The combination of energy absorption refrigeration, solar energy photovoltaic direct current refrigeration and radiation refrigeration technology.

Background technology

The use of conventional refrigerator needs to consume the wide variety of conventional energy, indirectly to environment, from the energy supply of China and From the point of view of the demand of environmental protection, the refrigerator of application clean energy resource will be trend of the times, and the application of wherein solar energy refrigerator is the widest General.In addition the vaccine in the remote districts being not yet included into supply network for the solar energy refrigerator, medicine, also play in the storage of food Important function.In many solar energy refrigerator technology, photovoltaic refrigerator and solar energy adsorb refrigerator and have wide answering With prospect, but some defects are still individually present in both solar energy refrigerator technology.

Adopt crystal silicon photovoltaic cell power generation to drive compressor cooling more solar energy photovoltaic direct current Refrigeration Technique, have at normal temperatures There is higher photoelectric transformation efficiency.Photovoltaic refrigerator have the advantages that daytime good refrigeration effect, capacity usage ratio high, but If needing night to freeze, need to use accumulator, in charge and discharge process, electric energy twice transformation efficiency is low, and power storage module is heavy and hold high Expensive, along with the higher price of crystal silicon photovoltaic battery, the economy of system still has much room for improvement.

Solar powered adsorption refrigeration technology middle plateform formula absorbing refrigeration system structure and operation control simply, technically relatively For maturation, daytime adsorbed working medium, gas working medium warp are discharged at high temperature by adsorbent bed thermal-arrest, adsorbent bed interior suction enclosure material Condensation liquefaction stores, and cover plate opened by night adsorbent bed, and after temperature reduces, adsorbing material starts absorption working pair, then the work of liquefied storage Matter constantly vaporizes heat absorption, reaches refrigeration purpose.Solar plate absorbing refrigeration system is high with season matching degree, is suitable for round the clock The larger area application of the temperature difference, but can only freeze at night, additionally, plate-type adsorbent bed need to maintain high temperature daytime, night needs again Persistently to radiate, to need the sealing structure of pressure-bearing to limit the heat-insulating property on its daytime and the heat dispersion at night, lead to its system Cold power is relatively low.

Radiation refrigeration technology refers to that the room temperature object of earth's surface passes through 8 ~ 13 mu m wavebands of one of " atmospheric window " with temperature very The low outer space carries out radiation heat transfer, and the atmosphere relatively low with temperature carries out radiation heat transfer, thus reaching certain The passive refrigeration modes of refrigeration.Radiation refrigeration movement-less part, noiseless, pollution-free, there is positive meaning to environmental conservation Justice.But because unit area refrigeration work consumption is relatively low and working time section is night, there is device in single radiation refrigeration system The relatively costly and low defect of utilization rate.

The generating efficiency of amorphous silicon photovoltaic cell is close to polycrystal silicon cell, and its production process little power consumption, pollution-free, become This only has 1/3rd of polycrystal silicon cell.But due to there is photo attenuation effect, (long strong illumination leads in battery Portion produces defect, reduces its opto-electronic conversion performance), its popularization and application is severely limited.Substantial amounts of experimentation proves, right For amorphous silicon battery, at higher temperatures, photo attenuation effect can substantially weaken.Research shows when 90 DEG C, amorphous Efficiency when silion cell has apparently higher than 25 DEG C after photo attenuation is stable, and in solar plate absorbing refrigeration system In, to needing higher adsorption temp (70～100 DEG C), this temperature range is especially suitable for non-conventional active carbon-methanol working medium The long-term efficiency power generation of crystal silicon battery (refer to j. rozario, a.h. vora, s.k. debnath, m.j.m. pathak, j.m. pearce. the effects of dispatch strategy on electrical performance of amorphous silicon-based solar photovoltaic-thermal systems. renewable energy 2014；68；459-465).

Utility model content

In order to solve defect present in existing solar energy refrigerator, comprehensive solar powered adsorption refrigeration, photovoltaic are straight The advantage flowing refrigeration and radiation refrigeration technology, this utility model is comprehensively utilized and radiation refrigeration by the photovoltaic and photothermal of solar energy Application provides a kind of novel solar energy refrigerator.

A kind of novel solar energy refrigerator includes refrigerator body 19, solar energy photovoltaic direct current refrigeration system and solar energy absorption system Cooling system；

Described solar energy photovoltaic direct current refrigeration system includes solar photovoltaic powered device, DC frequency-changeable compressor 3, first Condenser 4, capillary tube 5, the first vaporizer 6；Described DC frequency-changeable compressor 3, the first condenser 4 and capillary tube 5 are located at refrigerator Outside casing 19, described first vaporizer 6 is located in refrigerator body 19；Described solar photovoltaic powered device includes photovoltaic cell 1 and controller 2；Described photovoltaic cell top surface is coated with spectral selection composite layer 20；Described spectral selection composite wood The bed of material 20 is combined by selective reflection film 21 and selectivity transmitting film 22 and makes；

Described solar powered adsorption refrigeration system includes adsorbent bed 7, the second condenser 8, control valve 9, fluid reservoir 10, second Vaporizer 11, adsorbent bed 7 pass through connecting pipe successively directly with the second condenser 6, fluid reservoir 10 and the second vaporizer 11 phase Even, the pipeline between described fluid reservoir 10 and the second vaporizer 11 is provided with control valve 9, and described second vaporizer 11 is located at refrigerator case Inside body 19, the second condenser 8, control valve 9 and fluid reservoir 10 are located at the top in refrigerator body 19 outside；

In the daytime, the low temperature in refrigerator body 19 is maintained by solar energy photovoltaic direct current refrigeration system, solar photovoltaic powered Device is powered, and DC frequency-changeable compressor 3 obtains electric work, stably provides cold for refrigerator by compression kind of refrigeration cycle；Meanwhile, Adsorbing material temperature in adsorbent bed 7 in solar powered adsorption refrigeration system raises, and absorption refrigeration working medium wherein slowly discharges, The liquefaction cooling after the second condenser 6 condensation of gaseous refrigeration working medium, flows in fluid reservoir 10 and stores, in the process More than 9 of short duration unlatching of control valve, makes the liquid refrigeration working medium of storage in fluid reservoir 10 flow into the second vaporizer 11, maintains refrigerator case Temperature stabilization in body 19.

At night, solar energy photovoltaic direct current refrigeration system quits work, and novel solar energy refrigerator is by solar powered adsorption refrigeration System maintains low temperature in casing；During the dusk, adsorbent bed 7 interior suction enclosure material 15 and surrounding air heat loss through convection, pass through radiation simultaneously The mode of refrigeration further enhances radiating, and adsorbing material 15 temperature is reduced to after ambient temperature and relies solely on radiation refrigeration again It is further cooled to below ambient temperature；Now more than 9 of short duration unlatching of control valve, adsorbing material 15 starts absorption refrigeration working medium, Liquid refrigeration working medium interval vaporization heat absorption in second vaporizer 11 is so that low temperature in refrigerator；Adsorbent bed 7 maintains in the process Less than the state of ambient temperature, this process lasts till morning.

The technical solution limiting further is as follows:

Described photovoltaic cell 1 and adsorbent bed 7 constitute composite adsorption bed 12；Described adsorbent bed 7 includes box-like insulation shell 17, the top surface of insulation shell 17 is transparent cover plate 13, and inside is provided with adsorbing material 15, and photovoltaic cell 1 is fitted located at adsorbing material 15 top surface, the bottom of insulation shell 17 offers working medium gateway 16；Divide between transparent cover plate 13 both sides and insulation shell 17 It is not provided with flap opening mechanism 14；Photovoltaic cell 1 receives the solar irradiation through transparent cover plate 13.

The material of described transparent cover plate 13 is all band high permeability material such as polyethylene film, and it is including 0.2 ~ 3 μm Transmitance in all band of " atmospheric window " wave band of solar radiation wave band and 8 ~ 13 μm is all higher than 0.85, can effectively protect Carry out radiation heat transfer between card radiation refrigeration surface and the outer space and sky, obtain refrigeration.

The thickness of described spectral selection composite layer 20 is 25 μm, saturating in 0.2 ~ 3 μm of solar radiation wave band Rate of crossing is more than 0.8, is more than 0.8 in the emissivity of 8 ~ 13 μm " atmospheric window " wave bands, in 3 ~ 8 mu m wavebands and more than 13 μm The reflectance of wave band is more than 0.9.

The material of described selective reflection film 21 is indium tin oxide films, and thickness is 12.5 μm, in 0.2 ~ 3 μm of the sun The transmitance of radiation wave band is more than 0.9, is more than 0.9 in the reflectance of its all band.

The material of described selectivity transmitting film 22 is mylar or polyvinyl fluoride thin film, and thickness is 12.5 μm, 8 ~ 13 μm " atmospheric window " wave band emissivity be more than 0.8, its all band transmitance be more than 0.9.

The evenly laid out inside in insulation shell 17 of described adsorbing material 15, is closely pasted with insulation shell 17 interior sidewall surface Close.

Described flap opening mechanism 14 is the window butt mechanism of the manual type between cover plate 13 and insulation shell 17, place When closed mode, cover plate 13 and insulation shell 17 fit tightly, when being in opening, between cover plate 13 and insulation shell 17 Leave larger gap, make adsorbing material 15 can with air direct heat convection.

Described control valve 9 is ball valve or diaphragm valve or gate valve；When flap opening mechanism 14 in the daytime is closed, at control valve 9 In closed mode, of short duration unlatching when only the temperature in refrigerator body 19 is less than -20 DEG C；Open in dusk flap opening mechanism 14 3～5 hours, described control valve 9 was opened and is kept it turned on, when morning flap opening mechanism 14 is closed again Enter closed mode, form circulation.

Described fluid reservoir 10 be can pressure-bearing sealing structure fluid reservoir.

Described photovoltaic cell 1 is crystal silicon or amorphous silicon battery.

Advantageous Effects of the present utility model embody in the following areas:

(1) this utility model synthesis solar plate absorbing refrigeration system and solar energy photovoltaic direct current refrigeration system excellent Point, makes up, using photovoltaic refrigeration, the defect that flat absorption refrigeration cannot freeze in the daytime, instead of photovoltaic system using absorption refrigeration Costly and inefficient storage mechanism in cold is it is achieved that the photovoltaic and photothermal in solar energy refrigerator field comprehensively utilizes.Cooling system energy Power is strong, and aggregate efficiency significantly improves.

(2) it is coated with spectral selection composite layer on photovoltaic cell in this utility model, referring to Fig. 6,0.2～3 μm solar radiation wave band there is higher transmitance, thus ensureing the photovoltaic and photothermal performance on daytime；In 8～13 μm of " air Window " wave band has higher emissivity, and has high reflectance in its all band (3～8 μm and more than 13 μm), so The high emissivity that 8～13 μm " atmospheric window " wave band can be relied on carries out radiation refrigeration, and can rely on its all band (3～8 μm and more than 13 μm) high reflectance reduce its daytime to ambient radiation heat energy, night absorbs the radiant heat of surrounding Can, so that adsorbent bed has higher heat-collecting heat-preserving effect daytime, night has radiation refrigeration again and intercepts near-earth environment spoke Penetrate the ability of heat energy, the heat of adsorption of working medium adsorption process generation can be dispersed faster and make adsorbent bed be maintained at a below ambient temperature State.Spectral selection composite layer strengthens adsorbent bed dusk radiating rate by the ability of radiation refrigeration and makes adsorbent bed Night is able to maintain that in the state less than ambient temperature, improves adsorption-type system on the premise of maintaining temperature stabilization in refrigerator body Cold efficiency.

(3) this utility model realizes the comprehensive utilization of photovoltaic and photothermal using composite adsorption bed, and photovoltaic cell can adopt amorphous Silion cell, its daytime has higher generating efficiency under hot environment in adsorbent bed, and cost is significantly lower than crystal silicon photovoltaic electricity Pond.

Therefore this utility model passes through solar plate absorbing refrigeration system and solar energy photovoltaic direct current refrigeration system Photovoltaic and photothermal comprehensive utilization is realized in integration, improves the refrigerating efficiency of absorbing refrigeration system further using radiation refrigeration technology, and Higher photovoltaic efficiency can be realized using cheap amorphous silicon photovoltaic cell, finally realize the higher system of solar energy refrigerator Efficiency.

Brief description

Fig. 1 is the overall structure diagram of novel solar energy refrigerator；

Fig. 2 is the cross section structure diagram of composite adsorption bed；

Fig. 3 is selectivity composite spectral characteristic rough schematic view；

Fig. 4 is selective reflection film spectral characteristic rough schematic view；

Fig. 5 is selectivity transmitting film spectral characteristic rough schematic view；

Fig. 6 is the desired spectral character schematic diagram of selectivity composite.

Upper in figure sequence number: photovoltaic cell 1, controller 2, DC frequency-changeable compressor 3, the first condenser 4, capillary tube 5, first Vaporizer 6, adsorbent bed 7, the second condenser 8, control valve 9, fluid reservoir 10, the second vaporizer 11, composite adsorption bed 12, transparency cover Plate 13, flap opening mechanism 14, adsorbing material 15, working medium gateway 16, insulation shell 17, heat transfer fin 18, refrigerator body 19, Spectral selection composite layer 20, selective reflection film 21, selectivity transmitting film 22.

Specific embodiment

Below in conjunction with the accompanying drawings, by embodiment, the utility model is further described.

Embodiment

Referring to Fig. 1, a kind of novel solar energy refrigerator includes refrigerator body 19, solar energy photovoltaic direct current refrigeration system and the sun Can absorbing refrigeration system.

Solar energy photovoltaic direct current refrigeration system includes solar photovoltaic powered device, DC frequency-changeable compressor 3, first condensation Device 4, capillary tube 5, the first vaporizer 6.DC frequency-changeable compressor 3, the first condenser 4 and capillary tube 5 are located at outside refrigerator body 19 Portion, the first vaporizer 6 is located in refrigerator body 19.Solar photovoltaic powered device includes photovoltaic cell 1 and controller 2；Photovoltaic The top surface of battery 1 is coated with spectral selection composite layer 20；Spectral selection composite layer 20 is by selective reflection film 21 and selectivity transmitting film 22 be combined make, see the partial enlarged drawing on the right side of Fig. 2.

Solar powered adsorption refrigeration system includes adsorbent bed 7, the second condenser 8, control valve 9, fluid reservoir 10, second evaporation Device 11, adsorbent bed 7 is directly connected with the second condenser 6, fluid reservoir 10 and the second vaporizer 11 successively by connecting pipe；Storage Control valve 9 is provided with the pipeline between flow container 10 and the second vaporizer 11, control valve 9 is ball valve；Second vaporizer 11 is located at ice Inside box body 19, the second condenser 8, control valve 9 and fluid reservoir 10 are located at the top in refrigerator body 19 outside.

Referring to Fig. 2, solar photovoltaic powered device includes photovoltaic cell 1 and controller 2, photovoltaic cell 1 and adsorbent bed 7 structure Become composite adsorption bed 12.Adsorbent bed 7 includes box-like insulation shell 17, and the top surface of insulation shell 17 is transparent cover plate 13, internal Evenly laid out adsorbing material 15, is fitted tightly with insulation shell 17 interior sidewall surface；Photovoltaic cell 1 is fitted located at adsorbing material 15 Top surface, see the partial enlarged drawing on the right side of Fig. 2, the bottom of insulation shell 17 offers working medium gateway 16；13 liang of transparent cover plate It is respectively equipped with flap opening mechanism 14 between side and insulation shell 17；Flap opening mechanism 14 is to be installed on cover plate 13 and insulation cladding The window butt mechanism of the manual type between body 17, by hand control switch.Photovoltaic cell 1 receives through transparent cover plate 13 too Positive irradiation.In Fig. 2, the flap opening mechanism 14 of composite adsorption bed 12 is closed mode, during closed mode, cover plate 13 and insulation cladding Body 17 fits tightly；The flap opening mechanism 14 of the partial enlargement in figure on the left of Fig. 2 is opening, opens back shroud 13 and protects Leave larger gap between warm housing 17, make adsorbing material 15 can with air direct heat convection.

The thickness of the spectral selection composite layer 20 that photovoltaic cell 1 surface covers is 25 μm, and spectral selection is combined The spectral characteristic of material layer 20 simplifies to be illustrated referring to Fig. 3；Spectral selection composite layer 20 is by selective reflection film 21 and choosing Selecting property transmitting film 22 is combined and makes, the spectral characteristic of selective reflection film 21 and selectivity transmitting film 22 simplify illustrate respectively referring to Fig. 4 and Fig. 5, selective reflection film 21 is tin indium oxide (ito) thin film, and thickness is 12.5 μm, in 0.2～3 μm of sun spoke The transmitance of ejected wave section is more than 0.9, is more than 0.9 in the reflectance of its all band；Selectivity transmitting film 22 is that polyester (pet) is thin Film, thickness is 12.5 μm, is more than 0.8 in the emissivity of 8～13 μm " atmospheric window " wave bands, in the transmitance of its all band More than 0.9.

Operation principle of the present utility model is described as follows:

Referring to Fig. 1 and Fig. 2, with ambient temperature in the daytime be 18～25 DEG C, nighttime ambient temperature be that 15～20 DEG C of typical case is fine Make following analysis as a example bright weather conditions.

In the daytime, most solar radiations reach through the cover plate 13 on composite adsorption bed 12 and selectivity transmitting film 22 On selective reflection film 21, the solar radiation overwhelming majority reaching on selective reflection film 21 continues to be through and reaches photovoltaic electric On pond 1 and adsorbing material 15, it is converted to electric energy and heat energy.Solar energy photovoltaic direct current refrigeration system maintains in refrigerator body 19 Low temperature, solar photovoltaic powered device is powered, and DC frequency-changeable compressor 3 obtains electric work, is stably ice by compression kind of refrigeration cycle Case provides cold；Meanwhile, the cover plate 13 of the adsorbent bed 7 in composite adsorption bed 12 is combined with insulation shell 17 and makes adsorbing material 15 are in airtight heat storage state, and selective reflection film 6 can subtract effectively in the high reflectance of 3～8 μm and 13 μm band above The heat loss that produces because of radiation heat transfer between small package material and surrounding near-earth environment is it is ensured that higher heat storage capacity.Work as absorption When the temperature of material 15 reaches 70～100 DEG C, absorption refrigeration working medium wherein slowly discharges, and gaseous refrigeration working medium is through the After two condenser 6 condensation, liquefaction cooling, flows in fluid reservoir 10 and stores, this process generally requires time-consuming 6～9 hours.Day Between, when flap opening mechanism 14 is closed, control valve 9 is closed, when the cold that compression kind of refrigeration cycle provides excessively is led When in cause refrigerator body 19, temperature is less than -20 DEG C, the of short duration unlatching of control valve 9, then storage in fluid reservoir 10 under gravity Liquid refrigeration working medium is a small amount of to flow into the second vaporizer 11, and the higher refrigeration working medium of this portion temperature is changed with environment in refrigerator body 19 Heat, makes the scope that temperature in refrigerator body 19 maintains -10～-20 DEG C, and control valve is opened for more than 9 time and made storage in fluid reservoir 10 Refrigeration working medium all flow in the second vaporizer 11.

At night, solar energy photovoltaic direct current refrigeration system quits work, and novel solar energy refrigerator is by solar powered adsorption refrigeration System maintains low temperature in casing.During the dusk, transparent cover plate 13, adsorbent bed 7 interior suction enclosure material are opened by flap opening mechanism 14 15 with surrounding air heat loss through convection, meanwhile, in adsorbent bed 7, heat successively passes to selectivity transmitting film by way of conduction of heat 22, heat is passed to by thermal-radiating mode in the high emissivity of " atmospheric window " wave band by selectivity transmitting film 22 using it The outer space and atmosphere, further enhance radiating.After 3～4 hours adsorbing material 15 temperature are reduced to close to ambient temperature Close transparent cover plate 13, no then adsorbent bed 7 can rely on radiation refrigeration to be further cooled to below ambient temperature 5～10 to heat convection ℃.Now of short duration opening controlling valve 9, adsorbing material 15 starts absorption refrigeration working medium, liquid refrigeration working medium in the second vaporizer 11 Vaporization heat absorption, more than 9 of short duration unlatching of control valve makes ice the temperature inside the box maintain -10～-20 DEG C；Adsorbent bed 7 in the process It is maintained at a below the state of ambient temperature, its slow a small amount of heat of adsorption producing is dispersed by radiation refrigeration, and this process lasts till Morning；Adsorption process terminates rear control valve and reenters closed mode, forms circulation.

The transmitance of the solar radiation wave band at 0.2～3 μm for the spectral selection composite layer 4 is more than 0.8,8～13 μm the emissivity of " atmospheric window " wave band be more than 0.8,3 ~ 8 μm and 13 μm band above reflectance more than 0.9.

Photovoltaic cell 1 can adopt crystal silicon or amorphous silicon battery, because battery operating temperature in the daytime is with temperature in adsorbent bed 7 Raise and raise, therefore using the generating efficiency higher than under room temperature can be obtained during non-crystalline silicon.The material of transparent cover plate 13 is all-wave Section high permeability material such as polyethylene film, it is including 0.2 ~ 3 μm of solar radiation wave band and 8 ~ 13 μm " atmospheric window " ripple Transmitance in all band of section is all higher than 0.85, can guarantee that the radiation between radiation refrigeration surface and the outer space and sky is changed Heat.

Claims (10)

1. a kind of novel solar energy refrigerator, including the absorption of refrigerator body (19), solar energy photovoltaic direct current refrigeration system and solar energy Refrigeration system it is characterised in that:

Described solar energy photovoltaic direct current refrigeration system includes solar photovoltaic powered device, DC frequency-changeable compressor (3), first cold Condenser (4), capillary tube (5), the first vaporizer (6)；Described DC frequency-changeable compressor (3), the first condenser (4) and capillary tube (5) it is located at refrigerator body (19) outside, described first vaporizer (6) is located in refrigerator body (19)；Described photovoltaic supplies Electric installation includes photovoltaic cell (1) and controller (2)；The top surface of described photovoltaic cell (1) is coated with spectral selection composite wood The bed of material (20)；Described spectral selection composite layer (20) is combined by selective reflection film (21) and selectivity transmitting film (22) Make；

Described solar powered adsorption refrigeration system include adsorbent bed (7), the second condenser (8), control valve (9), fluid reservoir (10), Two vaporizers (11), adsorbent bed (7) pass through connecting pipe successively directly with the second condenser (6), fluid reservoir (10) and second Vaporizer (11) is connected, and the pipeline between described fluid reservoir (10) and the second vaporizer (11) is provided with control valve (9), and described second Vaporizer (11) is located at refrigerator body (19) inside, and the second condenser (8), control valve (9) are located at refrigerator case with fluid reservoir (10) Top outside body (19).

2. a kind of novel solar energy refrigerator according to claim 1 it is characterised in that: described photovoltaic cell (1) and absorption Bed (7) constitutes composite adsorption bed (12)；Described adsorbent bed (7) includes box-like insulation shell (17), the top of insulation shell (17) Face is transparent cover plate (13), and inside is provided with adsorbing material (15), the top surface that photovoltaic cell (1) is fitted located at adsorbing material (15), The bottom of insulation shell (17) offers working medium gateway (16)；Between transparent cover plate (13) both sides and insulation shell (17) respectively It is provided with flap opening mechanism (14)；Photovoltaic cell (1) receives the solar irradiation through transparent cover plate (13).

3. a kind of novel solar energy refrigerator according to claim 2 it is characterised in that: the material of described transparent cover plate (13) For all band high permeability material (as polyethylene film), it is " big the solar radiation wave band including 0.2～3 μm and 8～13 μm Transmitance in all band of transom window mouth " wave band is all higher than 0.85, is effective to ensure that radiation refrigeration surface and the outer space and sky Carry out radiation heat transfer between sky, obtain refrigeration.

4. a kind of novel solar energy refrigerator according to claim 1 it is characterised in that: described spectral selection composite The thickness of layer (20) is 25 μm, is more than 0.8 in the transmitance of 0.2～3 μm of solar radiation wave band, in 8～13 μm of " atmospheric electricity The emissivity of mouth " wave band is more than 0.8, is more than 0.9 in the reflectance of 3～8 mu m wavebands and 13 μm of band above.

5. a kind of novel solar energy refrigerator according to claim 1 it is characterised in that: described selective reflection film (21) Material is indium tin oxide films, and thickness is 12.5 μm, is more than 0.9 in the transmitance of 0.2～3 μm of solar radiation wave band, at it The reflectance of all band is more than 0.9.

6. a kind of novel solar energy refrigerator according to claim 1 it is characterised in that: described selectivity transmitting film (22) Material is mylar or polyvinyl fluoride thin film, and thickness is 12.5 μm, big in the emissivity of 8～13 μm " atmospheric window " wave band In 0.8, it is more than 0.9 in the transmitance of its all band.

7. a kind of novel solar energy refrigerator according to claim 2 it is characterised in that: described adsorbing material (15) is uniformly put down It is layered on the inside of insulation shell (17), fit tightly with insulation shell (17) interior sidewall surface.

8. a kind of novel solar energy refrigerator according to claim 2 it is characterised in that: described flap opening mechanism (14) is The window butt mechanism of the manual type between cover plate (13) and insulation shell (17), when being closed, cover plate (13) and Insulation shell (17) fits tightly, and when being in opening, leaves larger gap between cover plate (13) and insulation shell (17), Make adsorbing material (15) can with air direct heat convection.

9. a kind of novel solar energy refrigerator according to claim 1 it is characterised in that: described control valve (9) be ball valve or Diaphragm valve or gate valve；When flap opening mechanism in the daytime (14) is closed, control valve (9) is closed, only in refrigerator body (19) of short duration unlatching when the temperature in is less than -20 DEG C；Open 3～5 hours in dusk flap opening mechanism (14), described control valve (9) open and keep it turned on, when morning flap opening mechanism (14) is closed, reenter closed mode, shape Become circulation.

10. a kind of novel solar energy refrigerator according to claim 1 it is characterised in that: described fluid reservoir (10) be can hold The sealing structure fluid reservoir of pressure.