CN104344656A - A refrigerator - Google Patents

Abstract

A refrigerator capable of lightly irradiating the lower part side of a storeroom without the need of setting a new lamp in the refrigerator so as to improve food visuality is provided by the invention. A light source device, which is used for catalysis for activation of a photocatalyst in the storeroom with the photocatalyst and disposed at the lower part of the storeroom, is lighted intermittently (in a pulse type) under the state that the door of the refrigerator is closed, and is continuously lighted under the state that the door of the refrigerator is opened. The light source device is lighted intermittently under the state that the door is closed so as to activate the photocatalyst, and is continuously lighted under the state that the door is opened, and therefore the lower part side of a storeroom is lightly irradiated without the need of setting the new lamp in the refrigerator so as to improve the food visuality.

Description

Refrigerator

Technical field

The present invention relates to the refrigerator of foodstuff storing, drinking water etc., particularly relate to the refrigerator being provided with photochemical catalyst at storeroom.

Background technology

In recent years, receive various food along with the high capacity of refrigerator, surging to the health in refrigerator, care that is degerming, deodorizing.Such as to formation that is degerming in refrigerator, deodorizing, known in refrigerator configuration there is photochemical catalyst that is degerming, deodorization functions, thus the formation of foul smell in the cold air of removing circulation, bacterium.

Such as, in Japanese Unexamined Patent Publication 2010-121834 publication (patent document 1), show and decompression storeroom is set in the inside of storeroom, and in the wall portion of this decompression storeroom, the transmittance section making light transmission is set, at the inner side coating photochemical catalyst of this transmittance section, and intermittently irradiate light from outside and make the photocatalyst activity of the inner side of transmittance section thus carry out degerming, deodorizing.

Patent document 1: Japanese Unexamined Patent Publication 2010-121834 publication

Summary of the invention

But, when user accesses the collecting article of refrigerator in general refrigerator, if open door of storage room, detect door of storage room by door opening and closing testing agency and be opened and the lamp inside the box lighting the top being arranged at storeroom.Lighting by this lamp inside the box, user confirms food in the storeroom of refrigerator and takes out, or to the storage space storage food of sky.

But, because of the high capacity along with refrigerator, the chamber volume of storeroom becomes large in recent years, the distance be arranged between the lamp inside the box on the top of storeroom and the bottom of storeroom is elongated, or because of the component parts of other storeroom, the food that is contained and cause the illumination light from lamp inside the box to be blocked, there is the problem be only deteriorated by the visuality of the food of the words storeroom bottom of a lamp inside the box.Particularly as patent document l, the bottom of storeroom is provided with the little storeroom as decompression storeroom, the situation of the subsidiary receiver of this storeroom, lid is more.Therefore, there is the visuality making to be accommodated in the food of the inside of storeroom because of the existence of receiver, lid and become worse problem.

In order to solve such problem, can consider the method newly arranging lamp inside the box, but except needing new lamp inside the box, need to revise the design of refrigerator in order to arrange this new lamp inside the box, not talkative is real reply.

The object of the invention is to, provide and new lamp inside the box need not be set and the lower side of irradiating storeroom more brightly, thus improve the refrigerator of the visuality of food.

The invention is characterized in, make to be arranged at the bottom of storeroom and the catalysis light supply apparatus making to have the photocatalyst activity of the storeroom of photochemical catalyst under the pent state of the door of refrigerator off and on (pulse type) light, light continuously under the state that the door of refrigerator is opened.

According to the present invention, under the state of closing door, catalysis light supply apparatus intermittently lighted and make photocatalyst activity, under the state opening door, make catalysis light supply apparatus light continuously thus improve illumination functions, so new lamp inside the box need not be arranged and can irradiate the lower side of storeroom more brightly with catalysis light supply apparatus, the visuality of food can be improved.

In addition, under the state of closing door, catalysis light supply apparatus is intermittently lighted, so expose than the activity improving photochemical catalyst with continuity point, the rising of internal temperature can be suppressed further.

Accompanying drawing explanation

Fig. 1 is the outward appearance front view and the cross sectional side view that are suitable for refrigerator of the present invention.

Fig. 2 is the stereogram omitting the upper wall of decompression storeroom main body and the state of uncap.

Fig. 3 is the assembling stereogram of decompression storeroom.

Fig. 4 represents by light-catalyzed reaction, the carbon dioxide in decompression storeroom to be increased, the key diagram of the situation suppressing the freshness of food to reduce.

Fig. 5 is the sectional view of decompression storeroom.

Fig. 6 represents the side view installing the state before catalysis light supply apparatus at decompression storeroom.

Fig. 7 is the stereogram observing the LED hood inserting LED-baseplate from the back side.

Fig. 8 is stereogram and the sectional view of the seal of the surrounding being installed on the glass component being formed with photochemical catalyst.

Fig. 9 is the amplification view of the state of the seal represented before mounting glass parts.

Figure 10 is the chart of the relation representing the dutycycle (Duty ratio) of LED and the carbon dioxide generative capacity of photochemical catalyst.

Figure 11 is the chart of the relation summing up the energising electric power of LED and the carbon dioxide generative capacity of photochemical catalyst.

Figure 12 is the chart of the relation of the carbon dioxide generative capacity of maximum electrical current value when representing that the power consumption of LED is identical and photochemical catalyst.

Figure 13 is the chart of the carbon dioxide production representing the photochemical catalyst caused because the present embodiment is different with the method for lighting of LED in the past.

Figure 14 is the chart of the change of the K value of the fish block confirming the tuna caused because the present embodiment is different with the method for lighting of LED in the past.

Figure 15 is the chart of the change of the vitamin C surplus confirming the spinach caused because the present embodiment is different with the method for lighting of LED in the past.

Figure 16 is the chart of the illumination represented in the decompression storeroom that causes because the present embodiment is different with the method for lighting of LED in the past.

Figure 17 is the pie graph of the formation of the master control part representing refrigerator.

Figure 18 is the control flow chart of the lighting method of the LED performing one embodiment of the invention.

In figure:

100-refrigerator main body, 22-refrigerating chamber, 24,25-refrigerating chamber, 26-vegetable compartment, 22a-left refrigerating-chamber door, 22b-right refrigerating-chamber door, 23a-ice-making compartment door, 24a-epimere refrigerating chamber door, 25a-vegetable compartment door, 29-pump, 51-decompression storeroom, 60-decompression storeroom main body, 63-food service tray, 70-glass component, 71-photocatalyst layer, 72-seal member, 80-catalysis light supply apparatus, 81-LED-baseplate, 82-LED.

Detailed description of the invention

Below, utilize accompanying drawing to be described in detail embodiments of the present invention, but the invention is not restricted to following embodiment, in technological concept of the present invention, various variation or application examples are also contained within the scope of it.

Below, utilize accompanying drawing, an embodiment of refrigerator of the present invention is described.Fig. 1 is the figure of refrigerator main body 100, Fig. 1 (a) is its front view, and Fig. 1 (b) is its cross sectional side view.The refrigerating chamber 22 of the refrigerator 100 of the present embodiment is covered by 2, left and right door (left refrigerating-chamber door 22a, right refrigerating-chamber door 22b).Each door (left refrigerating-chamber door 22a, the former 22b of right refrigerating chamber) becomes the door of the French can rotated for axle with its width end.

The refrigerator 100 of the present embodiment has multiple storeroom, is formed with refrigerating chamber 22 at topmost, is formed with ice-making compartment 23 in the left side of the positive downside of refrigerating chamber, is formed with epimere refrigerating chamber 24 on right side.Hypomere refrigerating chamber 25 is formed with, in the positive downside of this hypomere refrigerating chamber 25 and the foot of refrigerator 100 is formed with vegetable compartment 26 in the positive downside of ice-making compartment 23 and epimere refrigerating chamber 24.Refrigerating chamber 22 and vegetable compartment 26 are storerooms (such as, about 5 DEG C) of refrigerated storage temperature band.Epimere refrigerating chamber 24, hypomere refrigerating chamber 25 are storerooms of the cryogenic temperature band (such as, the temperature band of about-20 DEG C ~-18 DEG C) of less than 0 DEG C.

Each storeroom is sealed by door and attached seal 11.As mentioned above, the refrigerating chamber 22 being positioned at uppermost is formed the left refrigerating-chamber door 22a of narrow width and right refrigerating-chamber door 22b and covers, these two (left refrigerating-chamber door 22a, right refrigerating-chamber door 22b) are by being arranged at the hinge 3(left hinge 3a on the top of refrigerator main body 100, right hinge 3b) etc., supported by axle in the mode that can rotate.That is, the appearance of french doors being formed as left and right opening type is formed.The opening and closing of two (left refrigerating-chamber door 22a, right refrigerating-chamber door 22b) is configured in the vicinity of axle support and the refrigerating-chamber door opening and closing testing agency 22c near upper end detects.

The ice-making compartment 23 and the epimere refrigerating chamber 24 that are configured at left and right are sealed by the ice-making compartment door 23a of the door as drawer type and epimere room door 24a respectively.And the opening and closing of these ice-making compartment door 23a and epimere refrigerating chamber door 24a is detected by the ice-making compartment door opening and closing testing agency 23b that closely configures and epimere refrigerating chamber door opening and closing testing agency 24b.

Hypomere refrigerating chamber 25 is also sealed by the hypomere refrigerating chamber door 25a of the door as drawer type, and its opening and closing is detected by hypomere refrigerating chamber door opening and closing testing agency 25b.Be configured at the vegetable compartment 26 of lowermost also by before the vegetable compartment door 26a of the door as drawer type covering, the opening and closing of this vegetable compartment door 26a is detected by vegetable compartment door opening and closing testing agency 26b.Hypomere refrigerating chamber door opening and closing testing agency 25b and vegetable compartment door opening and closing testing agency 26b is configured in width pars intermedia and top respectively.

Fig. 1 (b) represents the side section of refrigerator main body 100.The heat insulating box 19 that refrigerator main body 100 is formed by material stuffed heat insulated between outer container 21 and interior case 20 forms storeroom.Outer container 21 has top board 21a in ceiling portion, and side has rear plate 21b overleaf.It is divided in the vertical direction by the partition member 12 ~ 14 of 3 sections that storeroom above-below direction is divided in multistage, the present embodiment, is formed with refrigerating chamber 22, ice-making compartment 23 or epimere refrigerating chamber 24, hypomere refrigerating chamber 25, vegetable compartment 26 successively from upper.In order to supply cold wind to these each storerooms, the inner part inside the case of heat insulating box 19 is formed with cooling channel 18.At this cooling channel 18 except the not shown baffle plate making supply place of cold wind change, be also configured with pressure fan 27, cooler 28.The compressor 30 and condenser 31 that form the freeze cycle producing cold wind is configured with in the bottom of the rear side of refrigerator main body 100.

Ceiling face in the case of refrigerator main body 100 is provided with lamp inside the box 45, if refrigerating-chamber door opening and closing testing agency 22c detects refrigerating-chamber door, (left refrigerating-chamber door 22a, right refrigerating-chamber door 22b) opens, and lights.Lamp inside the box 45 not special provision is configured in shown position, also comprises the situation of the arbitrary position of the left and right sidewall, back face wall, diapire etc. be such as configured in refrigerating chamber 22.Above heat insulating box 19 and the rear portion side of refrigerator main body 100 is formed with recess 40, be configured with master control part 41.The outside quilt cover 42 of master control part 41 covers.Master control part 41 controls the compressor 30 etc. forming freeze cycle.

In refrigerating chamber 22, be provided with the dividing plate 46 ~ dividing plate 49 of the multistage be made up of transparent resin plate in demountable mode.The dividing plate 49 of lowermost is arranged with the back side of interior case 20 and two sides phase ground connection, its underlying space and lowermost space 50 is divided with superjacent air space.Decompression storeroom 51 is configured with in lowermost space 50.

The back panel 52 forming the path that the cold air supplied from pressure fan 27 is passed through is provided with at the back side of refrigerating chamber 22.

Be disposed with from a left side in lowermost space 50 for the ice making bucket (not shown) of the ice-making disc the supply system frozen water to ice-making compartment 23, for receiving the receiver (not shown) of the food of dessert etc. and reducing pressure to indoor and freshness for food keeps and the long-term decompression storeroom 51 preserved.Decompression storeroom 51 has the width degree narrower than the width degree of refrigerating chamber 22, with the flank abutment of refrigerating chamber 22 configure.

Cooled by compressor 30 and condenser 31 and be sent to refrigerating chamber 22 cold air by decompression storeroom 51 around, thus the inside of cooling decompression storeroom 51 indirectly.In addition, the configuration of ice making bucket, receiver, decompression storeroom 51 is not limited thereto, and such as, also can be omit the width of receiver and Enlarging decompression storeroom 51 and the formation maximized, the formation that ice making bucket is configured in different places.

Fig. 2 represents the stereogram omitting the upper wall of decompression storeroom main body and the state of uncap.Decompression storeroom 51 is configured to be possessed: the decompression storeroom main body 60 with the box like of food access opening portion; The food access opening portion of decompression storeroom main body 60 is carried out to the decompression door of storage room 61 of opening and closing; Storage food and engaging and the decompression storeroom container 63 that accesses with decompression door of storage room 61.By the handle 62 of operation decompression door of storage room 61, not shown negative pressure pump work and be depressurized the space that storeroom main body 60 and decompression door of storage room 61 impale and be depressurized, is formed as low-voltage space.Decompression storeroom container 63 is installed on the rear side of decompression door of storage room 61, can move forwards, backwards along with the movement of decompression door of storage room 61.

Decompression storeroom 51 is by negative pressure pump 29, and inner air is attracted, be reduced to force down than air air pressure, gas regulation room as example 0.8 air pressure (80kPa) etc.That is, the oxidation of storeroom 51 pairs of food of reducing pressure prevents, the freshness maintenance etc. of greengrocery brews special air ambient.

In addition, as shown in Figure 3, rib 60a is formed with at the upper surface of decompression storeroom 51 as projection.Thus, become between decompression storeroom 51 and the storage dividing plate 49 directly over it, to arrange the state in the gap of appropriateness by the formation supported.The rear portion of decompression storeroom 51 is provided with the air entry (not shown) of the cold air of refrigerating chamber 22, attracts decompression storeroom 51 ambient air and the cold air that flows, thus cooling decompression storeroom 51 indirectly.

In addition, reduce pressure storeroom 51 by there is front openings and the long roughly rectangular-shaped decompression storeroom main body 60 in flat inboard and forwards and rear to move and the decompression door of storage room 61 of opening and closing front openings forms periphery wall.In other words, the storeroom main body 60 that reduces pressure forms with box like.Specifically, utilize ABS(to comprise acrylonitrile, butadiene, cinnamic resin), AS(comprises acrylonitrile, cinnamic resin) etc. ester moulding, be formed as having facing the wall and meditating in both sides, underside wall, back face wall and upper wall by the shape of front openings.

That is, in order to access reserve to decompression storeroom 51, the decompression door of storage room 61 of opening and closing is provided with.Further, at the outer surface of decompression storeroom main body 60, be equipped with increase section coefficient with linearity or clathrate and improve the ribs 60a of intensity.In addition, the shape of ribs 60a is not limited thereto, as long as increase the section coefficient of decompression storeroom main body 60 and improve the shape of intensity.

Two sides of decompression storeroom main body 60 are provided with bolster 61s.Opening and closing handle 62 can be supported rotationally around bolster 61s.In addition, be configured with differential pressure at decompression door of storage room 61 and eliminate valve.User holds this opening and closing handle 62, and the locking during closedown of the opening and closing operations of the door of storage room 61 that carries out reducing pressure and decompression door of storage room 61, and, carry out differential pressure and eliminate the opening and closing of valve.

Be placed with the glass plate 70 of inner side coating photochemical catalyst at the upper surface of decompression storeroom main body 60, the inner side of this glass plate 70 is exposed to the inside of decompression storeroom main body 60.The catalysis light supply apparatus 80 with the LED82 being fixed on substrate 81 is provided with in the upside of glass plate 70.And the inner side of glass plate 70 is provided with sealing material 72.Prevent air from invading from the surrounding of glass plate 70 to the inside of decompression storeroom main body 60 thus.

In addition, when the storeroom 51 that reduces pressure is subtracted the village by negative pressure pump 29, the load putting on the door of storage room 61 that reduces pressure due to atmospheric pressure and the differential pressure of the pressure be depressurized of the inside of decompression storeroom 24 of the outside of the storeroom 24 that reduces pressure becomes large.Thus, quite large power is needed in order to directly open decompression door of storage room 61 user.Therefore, eliminate valve by opening differential pressure, the interior or exterior space of decompression door of storage room 61 is inserted, eliminate external and internal pressure difference and remove the load that differential pressure causes, make it possible to easily open decompression door of storage room 61.

If load food at decompression storeroom container 63 and close decompression door of storage room 61, then the movement of the gas between the front openings of the storeroom 51 that reduces pressure and decompression door of storage room 61 is suppressed.And if refrigerating-chamber door (left refrigerating-chamber door 22a, right refrigerating-chamber door 22b) is closed and door switch (not shown) becomes out (ON), then negative pressure pump 29 is driven, decompression storeroom 51 is depressurized the state for forcing down than air.Thus, the oxygen concentration reduced pressure in storeroom 51 reduces.That is, reduced by the oxygen concentration of the storeroom 51 that reduces pressure, the deterioration of the nutritional labeling in food can be prevented.

In addition, reducing pressure in the above-described embodiment, by negative pressure pump 29, the pressure of inside is depressurized storeroom 51, but in addition also has and do not reduce pressure and the situation of storing, so decompression storeroom 51 means the both sides of the situation comprising and be depressurized and situation about not being depressurized.

In the present embodiment, as detailed below, in the storeroom closed, preserve food, utilize this food to increase the carbon dioxide of storeroom, utilize carbon dioxide to reduce to suppress the freshness of food.

As an example of the method for increase carbon dioxide, light-catalyzed reaction can be utilized.In light-catalyzed reaction, by decomposing oxygen, hydrogen, the moisture in air, the free radical that generation of reactive is high, utilizes this free radical decompose odor component gas, or removes miscellaneous bacteria.In the storeroom closed, the moisture of food becomes the raw material of free radical, and the free radical from the moisture of food carries out the decomposition of foul smell component gas and degerming.

Further, utilize the redox reaction of light-catalyzed reaction that foul smell component gas and miscellaneous bacteria are finally decomposed into carbon dioxide and water.Stay in closed storeroom as the carbon dioxide of decomposition product and water.Moisture as the decomposition product of a side is reused as the raw material of free radical, and is conducive to the maintenance of high humidity environment.Carbon dioxide as the decomposition product of the opposing party suppresses the ferment reaction of meat and fish, or makes the respiration of vegetables reduce and prevent deterioration, or suppresses the breeding of microorganism.

Light-catalyzed reaction is carried out by preserving food at the storeroom closed, can utilize from the foul smell component gas of food and the moisture raw material as free radical, further, the carbon dioxide of the decomposition product as light-catalyzed reaction can be used in energetically the freshness maintenance etc. of food.Like this, in the storeroom closed, produce the primary effect decomposition of the foul smell component gas (and degerming) that light-catalyzed reaction brings and the quadratic response brought as the carbon dioxide of the product of light-catalyzed reaction, the freshness of food can be suppressed to reduce.

Therefore, in the present embodiment as shown in Figure 4, in the refrigerator of the decompression storeroom 51 closed when the storage possessing food, other component parts 70 of the component parts in the inside of the storeroom 51 closed or formation decompression storeroom 51 arranges the photochemical catalyst 71 of ultraviolet light or visible-light response type.Component parts 70 is formed by the light transmissive material making light pass through.Further, in order to irradiate visible ray or ultraviolet light to photochemical catalyst 71, catalysis light supply apparatus 80 is arranged on outside or the inside of storeroom 51.Catalysis light supply apparatus 80 is made up of substrate 81 and LED element 82.This catalysis light supply apparatus 80 is used in order to the visuality improved in decompression storeroom 51.

In addition, if make decompression storeroom 51 keep the state forced down than air, then the gas concentration lwevel in decompression storeroom 51 can be made higher than the gas concentration lwevel of common air.Thereby, it is possible to the quadratic response that performance carbon dioxide brings.

Further, in the present embodiment, the foul smell component gas produced from the food being stored in decompression storeroom 51 and ethylene gas etc., by light-catalyzed reaction described later, are changed to carbon dioxide.Therefore, except the above-mentioned effect brought except reducing pressure, can expect that the freshness that the change of the gas componant reduced pressure in storeroom 51 brings keeps effect.In addition, if the decompression storeroom 51 of closed state is depressurized, then evaporate some moisture from the food be accommodated in decompression storeroom 51.By the moisture of this evaporation, in decompression storeroom 51, become high humidity state (such as humidity is close to 100%).Further, the raw material of free radical is also used as from the moisture of food evaporation.

Fig. 5 illustrates the formation detailed further of Fig. 4.On the top of decompression storeroom 51, the glass component 70 as an example in transparent window portion is mounted via seal member 72.In other words, be formed with such as rectangular-shaped opening portion in the ceiling portion of decompression storeroom main body 60, via seal member 72, rectangular-shaped glass component 70 be installed in this opening portion.Gap between the periphery of seal member 72 filling glass parts 70 and opening portion, keeps the closure of decompression storeroom 51.When reducing pressure, decompression storeroom main body 60 bends, but now around glass component 70, does not also produce gap.

As shown in Figure 5, be positioned in the two sides of glass component 70 decompression storeroom 51 inside medial surface on be formed with photocatalyst layer 71.In Fig. 5, for the ease of understanding, represent the thickness of photocatalyst layer 71 turgidly.

The catalysis light supply apparatus 80 as light source is provided with above glass component 70.Preferred catalytic light supply apparatus 80 and glass component 70 configure as closely as possible.Increase to make the amount being arrived the light of photocatalyst layer 71 by glass component 70.Catalysis is far away by the distance of light line apparatus 80 and glass component 70, needs the output increasing catalysis light supply apparatus 80.The light that wavelength is short as ultraviolet is easily decayed, so preferred catalytic light supply apparatus 80 and glass component 70(are correctly formed at the photocatalyst layer 71 of glass component 70) distance short.

Catalysis light supply apparatus 80 is formed as the light source cell that can load and unload in the ceiling portion of decompression storeroom main body 60.Light source cell (catalysis light supply apparatus 80) is positioned at the upside of glass component 70, is detachably installed on ceiling portion.

Catalysis light supply apparatus 80 can by one or more LED(Light Emitting Diode) 82 be arranged at the LED-baseplate 81 of lower surface and form for the LED hood in ceiling portion LED-baseplate 81 being installed on decompression storeroom main body 60.LED hood also possesses the function of protection LED-baseplate 81.

Here, the wavelength of the light that catalysis is radiated with light supply apparatus 80 is discussed.Light such as can be divided into ultraviolet (10nm ~ 400nm), luminous ray (400nm ~ 800nm), infrared ray (800nm ~ 4 μm).

When forming photocatalyst layer 71 by the catalyst of the ultraviolet light response type reacted more by force ultraviolet light, catalysis light supply apparatus 80 is also formed by discharging ultraviolet LED.In the ultraviolet situation of use, need to arrange the parts for preventing user from looking at catalysis light supply apparatus 80 straight.But, in order to prevent contingency, preferably arrange for preventing ultraviolet from being prevented from using parts by the direct-view that user looks at straight.On the other hand, when forming photocatalyst layer 71 by the catalyst of the visible-light response type reacted more by force luminous ray and forming catalysis light supply apparatus 80 by the LED discharging visible ray, above-mentioned direct-view is not needed to prevent from using parts.Therefore, the photocatalyst layer 71 using visible-light response type and the catalysis light supply apparatus 80 exporting visible ray become simple formation.Further, when causing light-catalyzed reaction with luminous ray, do not need the above-mentioned parts of spatial placement in the space in refrigerator main body 1 or decompression storeroom 51, can not reduce the capacity in these spaces yet.

But ultraviolet has the energy higher than luminous ray.The ultraviolet of the 350nm that wavelength is long also has the energy of 343kj/mol.Be 353kj/mol in conjunction with C-C between the carbon forming the resin forming decompression storeroom 51.Therefore, if Ultraviolet radiation is to resin, cause chemical reaction, likely polymer chain cuts off, or the carbon in the part cut off and other place engages and is cross-linked, and causes resin deterioration.Particularly, decompression storeroom 51 needs the closed construction of resistance to decompression, so do not wish to make resin deterioration because of ultraviolet.

Therefore, in the present embodiment, the photocatalyst layer 71 utilizing visible-light response type and the catalysis light supply apparatus 80 radiating visible ray are to obtain light-catalyzed reaction.In the wave-length coverage of visible ray, as the visible ray of the wavelength near the 470nm that an example use energy comparison is strong.In life-span and luminous efficiency, LED has favourable feature, so catalysis light supply apparatus 80 is made up of LED in the present embodiment.

As the photochemical catalyst of visible-light response type, such as, knownly titanium oxide is processed as reaction to the photochemical catalyst etc. of visible region.But be not limited thereto, also can use tungsten oxide.Tungsten oxide only with visible ray reaction, does not react with ultraviolet, if so use tungsten oxide as photochemical catalyst, then obtain higher reaction efficiency.Tungsten oxide need not implement processing as titanium oxide, so its process easily, can reduce cost when being formed at glass component 70.On in this, use tungsten oxide more favourable as photochemical catalyst.

If form photocatalyst layer 71 by tungsten oxide, above-mentioned advantage can be obtained.But even so, also by titanium oxide or coordinate, or photocatalyst layer 71 can be formed with other the material that visible ray reacts.In addition, if can to allow when using ultraviolet light and obtain light-catalyzed reaction disadvantageously, then the formation using ultraviolet light can also be adopted.

The substrate (carrier) being preferably formed photocatalyst layer 71 can make photochemical catalyst adhere to, and, relative to for causing the light of light-catalyzed reaction transparent.Therefore, preferably substrate is formed by for the glass of visible transparent or resin.

But resin is organic matter, if so directly apply photochemical catalyst, cause the deterioration of resin.When forming substrate by resin, need prime treatment.On the other hand, glass is inorganic matter, so directly coating also can not deterioration.Therefore, from the viewpoint of the worker ordinal number, material cost etc. of substrate, preferably the substrate of attachment photocatalyst layer 71 is formed by glass.But, also can be on the surface of resin plate, implement prime treatment and form transparent protective layer, form the formation of photocatalyst layer 71 on the protection layer.

But the gauge of photocatalyst layer 71 is thicker, more can improve the effect of light-catalyzed reaction, but if gauge is blocked up, then the transparency reduces.Therefore, the light quantity through photocatalyst layer 71 reduces.Thus, when being used as the illumination in decompression storeroom 51 by luminous ray, the visuality of the storeroom 51 that reduces pressure due to deficiency in light quantity reduces.If photocatalyst layer 71 is blocked up, then photocatalyst layer 71 likely breaks.Therefore, in the present embodiment, less to reduce through light quantity, and, the mode of the possibility reduction of Physical Damage, the thickness of setting photocatalyst layer 71.

In the present embodiment, catalysis is also used as to irradiate the lighting device in decompression storeroom 51 with light supply apparatus 80.Therefore, if the upper direct irradiation light of food (food materials) in decompression storeroom 51, then likely cause making the nutritional labeling of food be oxidized due to photooxidation reaction, or the fading of food.In addition, about vegetables, although different according to its wavelength, if irradiate high light, likely light compositing reaction is promoted, and consumes the carbon dioxide in decompression storeroom 51.

Therefore, as shown in Figure 5, in the present embodiment, between food and glass component 70, arrange for the opaque shadow shield 90 of the irradiation light carrying out self-catalysis light source apparatus 80.Light through glass component 70 and photocatalyst layer 71 is blocked plate 90 and blocks, and can not shine directly into food.As in Fig. 5 with shown in dotted line, the gas (carbon dioxide, foul smell component gas, ethylene gas) in decompression storeroom 51 and moisture etc. circulate via the gap between shadow shield 90 and ceiling portion.In addition, be not necessarily need shadow shield 90, as long as with can not the position of mode determination catalysis light supply apparatus 80 of direct irradiation luminous ray on food, the formation of the oxidation of nutritional labeling suitably can be suppressed.

Use Fig. 6 to Fig. 8, illustrate the configuration example of the glass component 70 and catalysis light supply apparatus 80 blocking with photocatalyst layer 71.As shown in the stereogram of Fig. 3, in the ceiling portion of decompression storeroom main body 60, the glass component 70 and catalysis light supply apparatus 80 with photocatalyst layer 71 are installed in the mode that can load and unload.

After Fig. 6 represents the opening portion in ceiling portion glass component 70 being installed to decompression storeroom main body 60 via seal member 72, for installing the state of catalysis light supply apparatus 80.

Fig. 7 represents the situation of assembling catalysis light supply apparatus 80.Observe from the downside of LED hood 86 stereogram installing the state had before the LED-baseplate 81 of LED82 at the installing space 85 of the lower surface being formed at LED hood 86.In the lower face side of LED hood 86, be positioned at the downside of installing space 85, be formed with multiple (such as 2) support 84 in the direction of the width discretely.By these supports 84, LED-baseplate 82 is supported.The width dimensions of installing space 85 sets according to the width dimensions of LED-baseplate 82, so when LED-baseplate 81 is installed to installing space 85, LED-baseplate 81 is located in the direction of the width.In addition, arrange support 84 obliquely, so the inboard by LED-baseplate 81 being inserted into installing space 85, LED-baseplate 81 is also located on long side direction.Further, LED-baseplate 81 supports from downside by multiple support 84, so also naturally can not come off from LED hood 86.Support 84 is arranged on the position of not disturbing with LED82.

Fig. 8 represents the formation of seal member 72.Fig. 8 (a) is the stereogram of seal member 72, and Fig. 8 (b) is the sectional view of seal member.Be provided with sealed lip 72A at the outer peripheral face of seal member 72 and be formed at the upper and lower auxiliary lip 72B of sealed lip 72A.Sealed lip 72A is the parts for sealing in decompression storeroom 51, and auxiliary lip 72B is the parts for preventing dust from invading to sealed lip 72A.

Fig. 9 represents that the state of seal member 72 is placed in the ceiling portion in decompression storeroom main body 60, and glass component 70 is placed on the auxiliary lip 72B of seal member 72.And the upside of light supply apparatus 80 from glass component 72 of the catalysis shown in Fig. 7 covers under this state, complete decompression storeroom 51.And the illumination light carrying out self-catalysis light source apparatus 80 arrives photochemical catalyst 71 through glass component 70 makes photochemical catalyst 71 activate.And the irradiation light through this glass component 70 can irradiate the food in decompression storeroom 51.Control for this irradiation light is described in detail later.

Next, return Fig. 4, the photocatalysis in decompression storeroom 51 is described.If from the catalysis LED82 output packet of light supply apparatus 80 luminous ray containing the light of provision wavelengths (such as near 470nm), then this visible light-transmissive glass component 70 and incident light catalyst layer 71.If visible ray incident light catalyst layer 71, then generate electronics and hole.Hole band positive charge, so from moisture (H ₂0) seize electronics, generate OH free radical and hydroperoxyl radical.In addition, oxygen radical is generated being electronically attached to oxygen molecule of photocatalyst layer 71 generation.Contact with photocatalyst layer 71 from the moisture that evaporates a little of food in decompression storeroom 51 and become the raw material of free radical.

Free radical is by the gas (such as ethylene gas, methyl mercaptan, dimethyl disulfide) from food and be decomposed into carbon dioxide and water at the small organic matter (such as miscellaneous bacteria) swum in storeroom 51 that reduces pressure.As an example, following chemical formula (1) represents the decomposition reaction of the ethylene gas produced from vegetables.

C ₂H ₄+4O ₂→2CO ₂+2H ₂O （1）

Chemically formula (1) is known, and the oxygen from the ethylene gas and air of vegetables generation reacts and generates carbon dioxide and water.Vegetables in decompression storeroom 51 keep life, and the concentration ratio according to the oxygen in air and carbon dioxide packing is breathed.If decompression storeroom 51 in gas concentration lwevel uprise, then vegetables stomatal closure and respiratory activity is suppressed, so the deterioration of vegetables is suppressed.Therefore, it is possible to prevent the reduction of taste and nutrition in longer-term.

Decompression storeroom 51 preserve meat and fish be dead, so keep principle different from the freshness of vegetables.But the foul smell component gas produced from meat and fish and the gas of organic system are also decomposed into carbon dioxide and water by light-catalyzed reaction.

The carbon dioxide produced by light-catalyzed reaction is dissolved easily in water.Therefore, as the product of light-catalyzed reaction carbon dioxide solubility in food surface moisture and become carbonic acid.Carbonic acid makes the pH value of food surface change.If the pH value change of food surface, then inconsistent with the applicable pH of the microorganism being present in food surface.Therefore, the breeding of microorganism is suppressed.

In addition, the ferment reaction in food also has applicable pH, so the pH value change of food, and ferment can be suppressed to react.The carrying out that the freshness of meat and fish is reacted according to ferment and reducing.Therefore, suppressing ferment to react by making the pH value of food change, the freshness of meat and fish can be kept longly.

Further, photochemical catalyst decomposes the foul smell component gas in decompression storeroom 51, so can carry out the deodorizing of decompression storeroom 51.Further, if there is moisture in decompression storeroom 51, then free radical is generated by the action of photochemical catalyst.Therefore, it is possible to by the effect of free radical to degerming in decompression storeroom 51.

Like this, if the carbon dioxide in decompression storeroom 51 increases, then the freshness of meat and fish can be suppressed to reduce, also can suppress the quality deterioration of vegetables.But, the oxidation of food only can not be suppressed with carbon dioxide packing.When meat and fish, if produce oxidation reaction, then aliphatic acid deterioration, or the deterioration such as vitamins.

On the other hand, not only gas concentration lwevel is high for the decompression storeroom 51 of the present embodiment, is still held in the decompression storeroom of the state forced down than air.In other words, the ratio of the oxygen concentration of the common air of ratio of the oxygen concentration in decompression storeroom 51 is low, and on the contrary, the ratio of the gas concentration lwevel of the common air of ratio of the gas concentration lwevel in decompression storeroom 51 is high.

The composition of common air is oxygen 21%, carbon dioxide 0.4%.Ignore nitrogen and other minor constituent.If make the common atmospheric pressure of the pressure ratio of decompression storeroom 51 reduce by 20%, then compared with the composition in atmospheric pressure, oxygen 16%, carbon dioxide 0.032%.By light-catalyzed reaction, in decompression storeroom 51, produce carbon dioxide, so the gas concentration lwevel of the storeroom 51 that such as reduces pressure rises to the value of about 0.4%.These concrete numerical value just in order to understand an example of the action effect of the present embodiment, is not limited to these numerical value.

Next, the lighting method of the catalysis light supply apparatus 80 of the present embodiment is described.The master control part 41 that catalysis light supply apparatus 80 is arranged at the top of refrigerator 100 controls.

Figure 17 represents the formation of master control part 41, represents the relation of the input and output of case inner controller 200 and operating control device 300.Case inner controller 200 is formed to control microcomputer 201 in case for main body, and operating control device 300 controls microcomputer 301 for main body formed to operate.

Control in case microcomputer 201 by store the constant that uses in control program or computing etc. non-volatile storage part, carry out computing necessary in the execution of each controlling functions etc. operational part, form as the storage part of the volatibility of the working region used in computing, the efferent etc. that exports the control signal obtained by computing.

The control signal exported from efferent is sent to not shown drive circuit portion, generates the drive singal of the electrical load driven in each case in drive circuit portion.In case, electrical load is except box fan machine motor, mechanic chamber fan machine motor, refrigerating chamber pipeline baffle plate, refrigerating chamber pipeline baffle plate, vegetable compartment pipeline baffle plate, automatic ice maker, supply-water pump, Defrost heater, feed pipe heater, rotation separation heater, also has lamp inside the box 45, catalysis light supply apparatus 80 etc. related to the present embodiment.Like this, the function that microcomputer 201 possesses electrical load in driving box is controlled in case.

In addition, the function for monitoring controlling microcomputer 201 in case is to the sensor from the situation in watch box, the input information of switch input carries out the casing side surveillance monitored, except refrigerator temperature sensor, fresh-keeping (chilled) room temperature sensor, freezer temperature sensor, freezer temperature sensor, vegetable compartment temperature sensor, external air temperature sensor, outside chiller temperature sensor, also have refrigerating-chamber door switch 22c related to the present embodiment, ice-making compartment door switch 23b, refrigerating chamber door switch 24b, 25b, the input information of vegetable compartment door switch 26b etc. carries out the surveillance monitored.

On the other hand, operation control microcomputer 301 by the constant used in the input part of input sensor signal, storage control program or computing etc. non-volatile storage part, carry out computing required in the execution of each controlling functions etc. operational part, form as the storage part of the volatibility of the working region used in computing, the efferent etc. that exports the control signal obtained by computing.In addition, input part possesses AD conversion function analog signal being converted to data signal in the lump.

Operation controls microcomputer 301 and possesses function for monitoring and display/notification function.Display/notification function such as in Presentation Function, shows situation in content of operation or case in display frame or display LED, utilizes notification buzzer 40 to release the notification sound of the operation sound, alarm etc. of action button in notification function.These show/report function is general known.

And, control microcomputer 201 in case in the present embodiment to detect that the mode being made the pent situation of refrigerating-chamber door 22a, 22b and situation about being opened change lighting mode by refrigerating-chamber door switch 22c performs the control of catalysis light supply apparatus 80.Below this control is described.

In Figure 18, this control flow chart starts according to the arrival every the starting moment of stipulated time, by each treatment step, its function is described below.

" step 500 "

When performing this control flow, first step 500 judges the illuminating state of present catalysis light supply apparatus 80.Because if it is indefinite not judge that next this illuminating state then controls its starting point of illuminating state of why sample.This judgement can judge by monitoring the illuminating state mark that performs in starting cycle before.Therefore, if illuminating state is masked as the mark representing that interval is lighted in step 500, then can judge that present state is that refrigerating-chamber door 22a, 22b are closed.If be judged as interval illuminating state in step 500, enter step 501, be not intermittently light namely to light continuously if be judged as, enter step 505.

" step 501 "

If be judged as interval illuminating state in step 500, then perform the judgement whether cold sotrage door 22a, 22b open in step 501.Whether this judgement such as can switch to the arrival of " disconnecting (OFF) " state of switch signal to judge from " connecting (ON) " state by the signal of refrigerating-chamber door switch 22c.If this switching signal does not arrive, be judged as that refrigerating-chamber door 22a, 22b still close and enter step 502, if switching signal arrives be judged as that refrigerating-chamber door 22a, 22b open, enter step 503.

" step 502 "

If be judged as in step 501, refrigerating-chamber door 22a, 22b still close, then in step 502 illumination condition be maintained the state lighted of interval and carry out the activate of photochemical catalyst.If this process terminates, jump to end (END) and terminate this process, waiting for next starting cycle.In addition, in this situation, illumination condition mark does not still change for interval illuminating state.

" step 503 "

If switching signal arrives and is judged as that refrigerating-chamber door 22a, 22b open in step 501, then in step 503 illumination condition is changed to the state lighted continuously.If become continuous illuminating state like this, then catalysis light supply apparatus 80 irradiation light transmission glass component 70 and can irradiate strongly decompression storeroom 51 in food.Thus, user clearly can see the food in decompression storeroom 51.Continue this light continuously and enter following step 504.

" step 504 "

In step 504, represent that the illumination condition mark of interval illuminating state changes to the illumination condition mark representing continuous illuminating state so far.If this process terminates, jump to end (END) and terminate this process, waiting for next starting cycle.

And, if next starting cycle arrives, again perform step 500.That is, in the step 500 illustrated before, in the step 504 of starting cycle before, illumination condition mark changes to the illumination condition mark representing continuous illuminating state, so can be judged as that present state is that refrigerating-chamber door 22a, 22b are opened.If be judged as continuous illuminating state in step 500, enter step 505, be judged as it not being light i.e. interval continuously to light, again enter step 501.The later step of step 501 has illustrated so omit.

" step 505 "

If be judged as continuous illuminating state in step 500, then perform the judgement whether cold sotrage door 22a, 22b close in step 505.Whether this judgement can such as switch to the arrival of " connection " state of switch signal from "off" state by the signal of refrigerating-chamber door switch 22c and judge.If this switching signal does not arrive, be judged as that refrigerating-chamber door 22a, 22b are still opened and enter step 506, switching signal arrives and is judged as that refrigerating-chamber door 22a, 22b are closed and enters step S507.

" step 506 "

If be judged as in step 505, refrigerating-chamber door 22a, 22b are still opened, then in step 506 illumination condition is maintained the illumination of the state lighted continuously and continual reduction in pressure storeroom 51.The strong irradiation light transmission glass component 70 of catalysis light supply apparatus 80 and the food that can irradiate in decompression storeroom 51.Thus, user clearly can see the food in decompression storeroom 51.If this process terminates, jump to end (END) and terminate this process, waiting for next starting cycle.In addition, in this situation, illumination condition mark does not also change for continuous illuminating state.

" step 507 "

If switching signal arrives and is judged as that refrigerating-chamber door 22a, 22b are closed in step 505, then illumination condition is changed to the state that interval is lighted in step 507.If become interval illuminating state like this, then the intensity of the irradiation light of catalysis light supply apparatus 80 is weakened, and becomes the illumination condition being suitable for the activity of photochemical catalyst and the temperature of storeroom.Continue this interval light and enter following step 508.

" step 508 "

In step 508, represent that the illumination condition mark of continuous illuminating state changes to the illumination condition mark representing interval illuminating state so far.If this process terminates, jump to end (END) and terminate this process, waiting for next starting cycle.

And, repeatedly perform above-mentioned treatment step by this, when refrigerating-chamber door 22a, 22b are closed, catalysis light supply apparatus 80 is controlled as interval illuminating state, when refrigerating-chamber door 22a, 22b are opened, catalysis light supply apparatus 80 is controlled as continuous illuminating state.

Therefore, to improve the activate of photochemical catalyst in interval illuminating state, and the cycle execution that the temperature reducing pressure storeroom 51 does not rise is lighted, and is used for irradiating in decompression storeroom 51 in continuous illuminating state with brighter illumination.Here, the brightness of the catalysis light supply apparatus 80 of continuous illuminating state is set to export the output brighter than lamp inside the box 45.

Next, the interval of catalysis light supply apparatus 80 to be lighted and the relation lighted is described continuously.In the present embodiment as catalysis light supply apparatus 80 light source and use LED82.It is make to change to the current on time of LED82 that the interval of LED82 is lighted, repeatedly illuminating state and OFF state and light with pulse type, the method for state people being looked like always light.Current on time decides according to so-called dutycycle, and dutycycle is larger, and the average current value flowed is larger, and dutycycle is the continuous illuminating state of 100%() under the brightness of LED82 maximum.

On the other hand, if make dutycycle diminish, average current value diminishes, and the state extinguished is elongated, so promote the heat radiation of LED82 and the temperature reduced pressure in storeroom 51 can be suppressed to rise.Further, known light-catalyzed reaction is that the pulse that illumination light is irradiated off and on is lighted, thus its performance improves.Therefore, there is the dutycycle realizing the best of the raising of light-catalyzed reaction.

Figure 10 is the figure of the relation being summarised in carbon dioxide production and the dutycycle produced when preserving meat, fish, greengrocery in decompression storeroom 51.As can be seen from Figure 10, be 100% in other words carry out continuity point and to expose ratio with dutycycle, the carbon dioxide production carrying out the gas light-catalyzed reaction produced from food when interval is lighted increases.That is, the freshness that carbon dioxide production increase brings can be realized and keep the raising of effect, the raising by the catalytic performance of the deodorizing of light-catalyzed reaction, degerming performance etc.According to this Figure 10, so that roughly dutycycle 50% ~ 60% is for peak value, the situation that dutycycle diminishes reduces with catalyst performance when becoming large.

In addition, by improving dutycycle, the brightness of LED82 is also increased, but be accompanied by this, average current value becomes large.Improve dutycycle and the rising of average current value that brings causes that the temperature reduced pressure in storeroom 51 rises, the increase of power consumption.On the contrary, by reducing the brightness decline of dutycycle and LED82, but be accompanied by this, average current value diminishes.Reduce dutycycle and the minimizing of average current value that brings suppresses that the temperature in decompression storeroom 51 rises, the increase of power consumption.

Figure 11 sums up the identical electrical current value of situation of dutycycle and the figure of carbon dioxide production.As can be seen from Figure 11, if dutycycle is identical, the ratio of the larger carbon dioxide production of electrical current value is larger.That is, the freshness that carbon dioxide production increase brings can be realized and keep the raising of effect, the raising by the catalytic performance of the deodorizing of light-catalyzed reaction, degerming performance etc.This means if increase electrical current value, even if reduce the catalytic performance that dutycycle also can obtain regulation, and the rising of temperature can be suppressed.

According to such viewpoint, importantly from the current value suitably selected as the catalytic performance of illuminating visuality when lighting continuously, photochemical catalyst 71, the temperature of storeroom, the viewpoint of electric power consumption to LED82 stream and its dutycycle.That is, set current value higher to improve as illuminating visuality when lighting continuously, in order to improve the catalytic performance of photochemical catalyst 71, interval is lighted, and reduces dutycycle to suppress the temperature of electric power consumption and storeroom.

Therefore, first in order to reduce temperature, electric power consumption and the dutycycle avoided as shown in Figure 10 is the peak value of 50% ~ 60%, being set as the dutycycle of catalytic performance difference, improving the reduction of this catalytic performance by increasing current value as shown in figure 11.If like this, under the state that interval is lighted, can obtain the catalytic performance of regulation and suppress temperature to rise and electric power consumption, and current value is set as comparatively large under the state lighted continuously, so obtain stronger illumination light and the visuality of food can be improved.

According to such idea, Figure 12 sums up the maximum electrical current value of the identical situation of power consumption and meat, fish, greengrocery is preserved the figure of the relation of the carbon dioxide production after 8 hours.Now, dutycycle is set in the mode becoming with in the past (90mA, dutycycle 50%) identical power consumption.As can be seen from Figure 12, the gas concentration lwevel after preserving for 8 hours when electrical current value is 120mA is the highest.In the present embodiment, the maximum electrical current value of the LED82 forming catalysis light supply apparatus 80 is set to 120mA, in order to suppress for in the past equal electric power consumption and dutycycle is set to 25%.Thus, the performance from almost meeting as the catalytic performance of illuminating visuality when lighting continuously, photochemical catalyst 71, the temperature of storeroom, the viewpoint of electric power consumption is obtained.In addition, as the present embodiment, be not necessarily defined as maximum electrical current value 120mA, dutycycle 25%, also can be floating a little.

Like this, carry out interval with the dutycycle that the dutycycle 50% ~ 60% that can play catalytic performance than photochemical catalyst is little and light, and increase electrical current value now, just can obtain no less than in the past, or exceed catalytic performance in the past.Further, owing to increasing electrical current value so can intense illumination more when lighting continuously.

Use Figure 13, the increase of the carbon dioxide with photocatalysis is described.Figure 13 is that the interval of the LED82 of the formation catalysis light supply apparatus 80 set more in the present embodiment lights (current value 120mA, dutycycle 25%) and interval in the past lights the food preservation that (current value 90mA, dutycycle 50%) cause time the figure of gas concentration lwevel.According to about 3 times that the present embodiment gas concentration lwevel rises in the past.

Equally, utilize Figure 14 ~ Figure 16, the interval that the LED82 set in the present embodiment is described is lighted (current value 120mA, dutycycle 25%) and interval in the past light the freshness that carbon dioxide production increase when (current value 90mA, dutycycle 50%) preserves fish, vegetables brings and keep effect.

K value when preserving 3 days tunas in enclosure space (is represented one of biochemical index of the freshness of fish by Figure 14, to reduce along with freshness and ATP reduces, generate AMP or inosinic acid as index) figure when comparing when the interval of above-mentioned LED82 is lighted different.During the interval of the present embodiment is lighted, preserve the K value after 3 days and light low than interval in the past.This means the increase along with carbon dioxide production, the freshness of tuna reduces suppressed.

Figure 15 be by enclosure space preserve 3 days spinach vitamin C amount compare when the interval of above-mentioned LED82 is lighted different time chart.During the interval of the present embodiment is lighted, the vitamin C amount after 3 days of preserving lights height than interval in the past.This means the increase along with carbon dioxide production, the freshness of spinach reduces suppressed.

Figure 16 is the chart that the interval of more above-mentioned LED82 lights the illumination in asynchronous decompression storeroom 51.When refrigerating-chamber door 22c is opened, LED82 lights continuously, and when refrigerating-chamber door 22c is closed, interval place is bright.Compared with lighting with interval in the past, user open refrigerating-chamber door and in visual confirmation decompression storeroom 51 time the present embodiment in current value comparatively large, so can more easily see brightly.On the other hand, when refrigerating-chamber door is closed, be and in the past equal brightness, this means that power consumption is also equal.

As previously discussed, the present invention be configured to make to be arranged at the bottom of storeroom and the catalysis light supply apparatus making to have the photocatalyst activity of the storeroom of photochemical catalyst under the pent state of the door of refrigerator off and on (pulse type) light, light continuously under the state that the door of refrigerator is opened.

Thus, under the state of closing door, catalysis light supply apparatus lighted off and on and make photocatalyst activity, under the state opening door, make catalysis light supply apparatus light continuously and improve illumination functions, thus new lamp inside the box need not be set and the lower side of storeroom can be irradiated more brightly so the visuality of food can be improved with catalysis light supply apparatus.

Claims (5)

1. a refrigerator, possesses: be formed at least more than one the storeroom in the interior case of refrigerator main body; Be arranged at the lamp inside the box of above-mentioned storeroom; Be arranged at other storeroom of the inside of above-mentioned storeroom; Be arranged at other the photochemical catalyst of a part of storeroom above-mentioned; The catalysis light supply apparatus of light is irradiated to above-mentioned photochemical catalyst; The door of storage room of the above-mentioned storeroom of opening and closing; And at least control the control device of illuminating state of above-mentioned lamp inside the box and above-mentioned catalysis light supply apparatus, it is characterized in that,

Above-mentioned control device makes above-mentioned catalysis light supply apparatus light off and under the pent state of above-mentioned door of storage room, makes above-mentioned catalysis light supply apparatus light continuously under the state that above-mentioned door of storage room is opened.

2. refrigerator according to claim 1, is characterized in that,

The opening and closing testing agency that the opening and closing of storeroom is detected is provided with at above-mentioned door of storage room, if detect that storeroom is opened by above-mentioned opening and closing testing agency, then above-mentioned control device makes above-mentioned lamp inside the box light and above-mentioned catalysis light supply apparatus is lighted continuously.

3. refrigerator according to claim 2, is characterized in that,

Above-mentioned catalysis light supply apparatus is LED element, and the interval of above-mentioned LED element is lighted and decided according to dutycycle, and lights with the dutycycle that the catalytic performance that above-mentioned dutycycle is less than above-mentioned photochemical catalyst becomes the dutycycle of peak value.

4. refrigerator according to claim 3, is characterized in that,

Other storeroom above-mentioned is the decompression storeroom that inside is depressurized.

5. refrigerator according to claim 3, is characterized in that,

The maximum electrical current value flowed in above-mentioned LED element is about 120mA, and the dutycycle be energized in above-mentioned LED element is about 25%.