CN102012142A - Refrigerator - Google Patents
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- CN102012142A CN102012142A CN2010101146924A CN201010114692A CN102012142A CN 102012142 A CN102012142 A CN 102012142A CN 2010101146924 A CN2010101146924 A CN 2010101146924A CN 201010114692 A CN201010114692 A CN 201010114692A CN 102012142 A CN102012142 A CN 102012142A
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Abstract
The present invention provides an improved structure of a refrigerator which is used for performing optimal refrigerated storage for the food comprising meat and fish and can perform ice-temperature zone storage that is difficult in prior-art structure. A body is internally provided with a storage chamber and a freezing circulation. In the refrigerator which is provided with a cold air channel that guides the cold air from the freezing circulation to the storage chamber, one part of the storage chamber is provided with a storage space which closes the inner part relatively to the outer part. Furthermore the storage which is optimal for refrigerated storage of food below the ice-temperature zone can be performed through a low-pressure chamber that is indirectly cooled by the freezing circulation.
Description
Technical field
The present invention relates to refrigerator, especially, relate to and have the refrigerator that as one man can suppress nutritional labeling and cell deteriorated structure with the cryogenic temperature of food.
Background technology
Food owing in preservation with airborne oxygen reaction carrying out oxidation.Especially, the contained vitamin C of the contained partial amino-acid of unrighted acids such as the DHA that contains in a large number of fish and EPA, meat and vegetables etc. is because of contacting loss gradually with airborne oxygen.So, thereby the effective use by vacuum-packed and antioxidant etc. waits and reduces the technology that oxygen concentration prevents the oxidation of nutritional labeling and adopted in a large number in daily life.
As an one example, in the past, for example, as by known to the following patent documentation 1, thereby have by using vavuum pump to attract air in the closed container in the refrigerator to reduce the amount of oxygen of internal tank, suppress the refrigerator because of the deterioration due to the oxidation of nutritional labeling.Promptly, the refrigerator of this patent documentation 1 record based on the viewpoint that prevents food freezing and with indoor temperature as the refrigerated storage temperature band, the maintenance function of the freshness of food such as the raising flesh of fish, dairy products, vegetables, fruit.
Patent documentation 1: TOHKEMY 2009-8292 communique.
But, in the refrigerator of above-mentioned prior art, because the temperature band of above-mentioned low-pressure chamber is set at so-called refrigerated storage temperature band, so be suitable for storing solidification point most and be near 0 ℃ fruits and vegetables and dairy products etc., but, relatively moisture is few for fish and meat and vegetables, and is therefore relative with it, and the temperature that can not say so suitable is set.
Usually, the temperature band during for food preservation, as long as food does not freeze, therefore the low more activity that then can suppress the enzyme in the food more of temperature has good keeping qualities.If the activity of the enzyme in the food is inhibited, the decomposition that enzyme causes does not then take place, biological respinse is also few, therefore can suppress the minimizing of nutritional labeling.
Wait the various researchs of being carried out according to inventor of the present invention, distinguish following situation.The contained nucleotide (ATP, ADP etc.) of fresh fish and shellfish is decomposed in storage, especially, mainly becomes IMP in the fish.Proceed if decompose, then become inosine and hypoxanthine, become the not positive reason of taste.Phosphorus fat compound (リ ン Zhi Quality) is compared with the neutral fats compound and is easy to decompose in refrigeration, generates free fatty, becomes the oxidation of food and the reason of protein denaturation.So,, can suppress oxidation reaction and improve keeping quality by under lower temperature and with uncongealable 0 ℃～-1 ℃ temperature of meat and fish (below be called " ice Wen Wendu band " in the present embodiment), preserving.
On the other hand, the temperature of each storeroom of refrigerator is accompanied by the switching, defrosting of door etc. and rises, perhaps the part cooling that causes because of the cold air blow-off outlet that is provided with in many places and connection, the disconnection of compressor produce inhomogeneities, so are difficult to it is adjusted into suitable temperature.Especially, under the situation that will carry out above-mentioned ice temperature storage, existence remains on the temperature in the regulation zone of refrigerator inside the problem that is difficult in the reality that is controlled at of uniform temperature (that is ice Wen Wendu band).Especially, 0 ℃～-5 ℃ ice Wen Wendu band is that the fastest maximum ice crystal of ice crystal (water crystallization) growth in the food generates band, therefore at this ice Wen Wendu band, because of the generation of ice crystal destroys the cell of food, damages easily.That is, if big in this ice Wen Wendu band temperature change, then food repeats to freeze, thaw, and the less ice crystal that exists in cell moves and interosculates to the extracellular, becomes bigger crystal.Because of this character, the problem that exists ice crystal to grow greatlyyer.
Like this, according to the preservation at above-mentioned ice Wen Wendu band, suppress the breeding of bacterium on the one hand, under the big situation of this temperature change, the influence pair cell generation that food waits because of ice crystal in storage recrystallizes damages on the other hand.Therefore, exist what is called to drip and flow out and the minimizing of delicious composition, perhaps because food dries out the problems such as (for example, wizened mouthfeels) thereby mouthfeel descends.
In addition, especially under the situation of the direct storeroom of cooled, dry air contact food surface, promote dry, cause the variable color of food surface, have again that drying and surface area become in the big cell and be easy to enter air, its result might cause that the freshness of the oxidation promotion etc. of lipids changes.
Summary of the invention
So the present invention makes in view of above-mentioned prior art problems, more specifically, thereby its objective is and provide by adopting above-mentioned ice Wen Wendu band to have the best cryopreserved structure improved refrigerator of the food that can comprise meat and fish.
For achieving the above object, according to the present invention, a kind of refrigerator at first is provided, in main body, have a plurality of storerooms and freeze cycle, formation will be from the cold air of the above-mentioned freeze cycle cold air path to above-mentioned a plurality of storerooms guiding, wherein, at least a portion of above-mentioned a plurality of storerooms possess with its inside with respect to the outside airtight storage space, and, constitute above-mentioned cold air path in the mode that the temperature of above-mentioned storage space can be set at ice Wen Wendu band by above-mentioned freeze cycle.
In addition, in the present invention, in the refrigerator of above-mentioned record, it is desirable to above-mentioned cold air path and constitute the above-mentioned storage space of indirect cooling, have, it is desirable to above-mentioned storage space and possess the mechanism of decompressor that will reduce pressure in the low-pressure chamber, this low-pressure chamber is the low low-pressure chamber of its built-in pressure ratio external pressure.
Have again, according to the present invention, in the refrigerator of above-mentioned record, it is desirable to above-mentioned low-pressure chamber constitutes, except above-mentioned ice Wen Wendu band also can and the refrigerated storage temperature band between design temperature selectively, have again, it is desirable to the post-decompression air pressure of above-mentioned low-pressure chamber is controlled to be 0.7 air pressure～0.9 air pressure.Have again, it is desirable to the humidity in the above-mentioned low-pressure chamber is controlled to be 70%～99%, and, the mechanism of decompressor that it is desirable in above-mentioned low-pressure chamber, also have the oxygen concentration that reduces this low-pressure chamber inside.
In addition, according to the present invention, in the refrigerator of above-mentioned record, thereby it is desirable to above-mentioned low-pressure chamber is located at the action of damper device of the part of above-mentioned cold air path and changes between above-mentioned ice Wen Wendu band and above-mentioned refrigerated storage temperature band by control, have again, it is desirable to above-mentioned low-pressure chamber and on its part, possess heater, detect the temperature sensor of the temperature in the above-mentioned low-pressure chamber and the temperature regulation section of regulating above-mentioned low pressure indoor temperature, also possess the control device of controlling the action of above-mentioned heater and above-mentioned damper device according to the temperature after regulating by the temperature of said temperature sensor detection with by the said temperature adjusting portion.In addition, it is desirable to that above-mentioned control device is controlled so that the temperature in the above-mentioned low-pressure chamber is in the temperature change amplitude of above-mentioned design temperature ± 1 ℃.
According to the refrigerator of the invention described above, can adopt the ice Wen Wendu band that is difficult to realize in the past structure, therefore the structure improved refrigerator of the best stored refrigerated usefulness that possesses the food that can realize comprising meat and fish can be provided.In addition, according to the present invention, can be according to taking in food be refrigerated storage temperature band and ice Wen Wendu band with the low-pressure chamber internal conversion.In addition, thereby the temperature change that becomes problem when ice Wen Wendu band is preserved food suppresses the convection current of cold air by reducing pressure in to low-pressure chamber, thereby can suppress temperature change by low-pressure chamber is cooled off indirectly, and can suppress the influence of the growth of ice crystal food cell.In addition,, preserve, can suppress drying, variable color and the lipids oxidation etc. of food so humidity always can be remained high wetland owing to cool off indirectly with closed structure.
Description of drawings
Fig. 1 is the central longitudinal sectional view of the refrigerator of an embodiment of the invention.
Fig. 2 is the sectional block diagram of the orlop space segment of above-mentioned refrigerating chamber shown in Figure 1.
Fig. 3 is the front view of the backplate of above-mentioned refrigerator shown in Figure 1.
Fig. 4 is the controlling party block diagram of control content in the refrigerator of the above-mentioned present embodiment of expression.
Fig. 5 is the figure of expression because of the ascorbic measurement result of the different cauliflowers that change of storage temperature and cooling structure.
Fig. 6 be expression according to the difference of cooling structure (temperature change amplitude), with SEM observe storage after 3 days the beef cell and carry out that image handles that ice is extracted ice pellets out and the figure that obtains the result of voidage.
Among the figure:
The 1-refrigerator main body, the 2-refrigerating chamber, 3, the 4-refrigerating chamber, the 5-vegetable compartment, the 6-refrigerating-chamber door,
7,8-refrigerating chamber door, 9-vegetable compartment door, case in the 11-outer container, 12-,
The 13-foam-thermal insulation, the 14-compressor, the 15-evaporimeter, the 16-blower fan,
17～20-shelf, 21-orlop space, 22-ice making water tank, the 23-receiver,
The 24-low-pressure chamber, 25～27-door pocket, 28-ice making water pump, the 29-negative pressure pump, the 30-backplate,
31-first cold gas exhausting outlet, 32-second cold gas exhausting outlet, 33-cold air return port,
34～36-next door, 37-cold air backward channel, 40-low-pressure chamber main body, 41-damper device,
The 42-temperature sensor, the 43-heater, the 44-temperature regulation section, the 45-control device,
50-low-pressure chamber door, the 60-food service tray, the 80-antioxidant content is emitted box.
The specific embodiment
Below, come the refrigerator of one embodiment of the present invention is elaborated with reference to accompanying drawing.
At first, come the structure of refrigerator of the present invention is described with reference to appended Fig. 1 and Fig. 2.Have, Fig. 1 is the central longitudinal cutaway view of the refrigerator of present embodiment again, and Fig. 2 is the sectional block diagram of the orlop space segment of above-mentioned refrigerator shown in Figure 1.
As from institute these figure is clear and definite, refrigerator constitutes, and possesses refrigerator main body 1 and at its a plurality of 6-9 that are provided with previously.Refrigerator main body 1 is made of the outer container 11 of steel plate system, resinous interior case 12, the urethane foam heat-insulating material 13 of filling between these parts and/or vacuum heat insulation materials (not shown), from the top of figure, form a plurality of storerooms with the order of refrigerating chamber 2, refrigerating chamber 3,4 and vegetable compartment 5.In other words, divide configuration refrigerating chamber 2 in the superiors respectively, divide configuration vegetable compartment 5, the refrigerating chamber 3,4 that configuration separates from this two Room heat between refrigerating chamber 2 and vegetable compartment 5 at orlop.Refrigerating chamber 2 and vegetable compartment 5 are storerooms of refrigerated storage temperature band, and refrigerating chamber 3,4 is storerooms of the cryogenic temperature band (for example, about-20 ℃～-18 ℃ temperature band) below 0 ℃.These storerooms 2～5 are divided by next door 33,34,35.
As mentioned above, for sealing the front openings portion of a plurality of storerooms 2～5, and be respectively equipped with door 6～9 in the front of refrigerator main body 1.Refrigerating-chamber door 6 is doors of the front openings portion of sealing refrigerating chamber 2, refrigerating chamber door 7 is doors of the front openings portion of sealing refrigerating chamber 3, refrigerating chamber door 8 is doors of the front openings portion of sealing refrigerating chamber 4, and vegetable compartment door 9 is doors of the front openings portion of sealing vegetable compartment 5.In addition, refrigerating-chamber door 6 is made of the double door of opposite opened, and refrigerating chamber door 7, refrigerating chamber door 8, vegetable compartment door 9 are made of the door of drawer type, makes the interior container of storeroom with pulling out the structure that door is pulled out.
Refrigerator main body 1 at said structure is provided with freeze cycle.This freeze cycle is by with compressor 14, condenser (not shown), capillary (not shown) and evaporimeter 15 and return compressor 14 and be linked in sequence with this and constitute.Compressor 14 and condenser are arranged in the Machine Room of the lower backside of being located at refrigerator main body 1.It is indoor that evaporimeter 15 is arranged on the cooler of being located at refrigerating chamber 3,4 rears, above the evaporimeter 15 of this cooler chamber blower fan 16 is set.
Carry to each storeroom such as refrigerating chamber 2, refrigerating chamber 3,4 and vegetable compartment 5 by blower fan 16 by not shown here cold air path by above-mentioned evaporimeter 15 cooled cold air.Particularly, the cold air of being carried by blower fan 16 is through damper to be opened/closed, and its part is sent to the storeroom of the refrigerated storage temperature band of refrigerating chamber 2 and vegetable compartment 5, and remainder is sent to the storeroom of the cryogenic temperature band of refrigerating chamber 3,4.
, after cooling off in each storeroom, the cold air that each storeroom of refrigerating chamber 2, refrigerating chamber 3,4 and vegetable compartment 5 is carried returns to the cooler chamber by blower fan 16 by the cold air backward channel.Like this, the refrigerator of present embodiment has the loop structure of cold air, and, each storeroom 2～5 is remained on suitable temperature.
The shelf 17～20 of the multilayer that constitutes with transparent resin plate removably is set in refrigerating chamber 2 in addition.Undermost shelf 20 is provided with the back side of case 12 in contacting and the mode of two sides, and with its down side space be that so-called orlop space 21 demarcates from superjacent air space.In addition, the door pocket 25～27 of multilayer is set in the inboard of each refrigerating-chamber door 6, these pockets 25～27 are arranged under the refrigerating-chamber door 6 pent states outstanding in refrigerating chamber 2.Be provided with the backplate 30 of the passage that cold air that formation supplies with from blower fan 16 passes through at the back side of refrigerating chamber 2.
As from institute Fig. 2 is clear and definite, in orlop space 21, be respectively equipped with successively: be used for ice making water tank 22: take in the receiver 23 that food such as dessert is used to the ice making tray the supply system frozen water of refrigerating chamber 3 from a left side: and with indoor decompression and the low-pressure chamber 24 that is used to keep the freshness of food and carries out long preservation.Low-pressure chamber 24 has than the horizontal wide of the horizontal width of refrigerating chamber 2 and with the side of refrigerating chamber 2 and disposes in abutting connection with ground.Have again, can be clearly such from figure, it surrounds these low-pressure chamber 24 usefulness walls and goalkeeper on every side and forms airtightly, therefore, can make its inner air pressure than outside low.
Ice making water tank 22 and receiver 23 are configured in the rear of refrigerating-chamber door 6 (Fig. 1) in the left side of Fig. 2.Therefore, can only just can pull out ice making water tank 22 and receiver 23 by the refrigerating-chamber door 6 of opening the left side.In addition, low-pressure chamber 24 is configured in the rear of refrigerating-chamber door 6 on the right side of figure.Like this, can only just can pull out the food service tray 60 of low-pressure chamber 24 by the refrigerating-chamber door 6 of opening the right side.Have, these ice making water tanks 22 and receiver 23 are positioned at the rear of the undermost door pocket 27 of refrigerating-chamber door 6 in above-mentioned Fig. 1 again, and low-pressure chamber 24 also is positioned at the rear of the undermost door pocket 27 of refrigerating-chamber door 6.
Secondly, use appended Fig. 3 to come the detailed structure of above-mentioned backplate 30 shown in Figure 1 is described.On this backplate 30, be provided with: the cold gas exhausting outlet (first cold gas exhausting outlet) 31 that cools off usefulness to the refrigerating chamber of refrigerating chamber 2 cool-air feeds; Cool off the cold gas exhausting outlet (second cold gas exhausting outlet) 32 of usefulness to the low-pressure chamber of the orlop space of refrigerating chamber 2 21 cool-air feeds; And cold air return port 33.The one side ground, side that cold air return port 33 is positioned at the rear, the back side of low-pressure chamber 24 near refrigerating chamber 2 is provided with.
In addition, cold gas exhausting outlet 32 above low-pressure chamber 24 and shelf 20 below setting with gap.The cold air of discharging from cold gas exhausting outlet 32 on low-pressure chamber 24 and shelf 20 below Clearance Flow, from top cooling low-pressure chamber 24.Therefore, cool off low-pressure chamber 24 indirectly.
In addition, be provided with the damper device 41 that is used to control cold air mobile usefulness in low-pressure chamber 24 by upstream side than cold gas exhausting outlet 32.The switching of this damper device 41 is controlled the cold air supply to low-pressure chamber 24 thus by not shown control device control.
Have again,, rise, for example, be provided with heater 43 for making the temperature in the above-mentioned low-pressure chamber 24 as above-mentioned shown in Figure 1.This heater 43 is located at the perspective plane, below in the low-pressure chamber 24, in this example, make with low-pressure chamber 24 in the bottom surface heater of same degree area substantially.
Moreover, here, with the right flank ground configuration of low-pressure chamber 24 near refrigerating chamber 2, eliminate the gap on the right side of low-pressure chamber 24, and the left part on low-pressure chamber 24 is provided with the gap that not shown shelf (next door) is eliminated the left side of low-pressure chamber 24, thereby the cold air of discharging from cold gas exhausting outlet 32 can be to the shunting of the side of low-pressure chamber about 24, and flows on low-pressure chamber 24.Like this, by the top air conditioning quantity of increase cooling low-pressure chamber 24, thereby can cool off fast in the low-pressure chamber 24.The left surface by low-pressure chamber 24 is inhaled into cold air return port 33 from the place ahead of low-pressure chamber 24 to cool off cold air behind this low-pressure chamber 24 top, returns to the cooler chamber by the cold air backward channel.The rear, the back side that cold air return port 33 is arranged in low-pressure chamber 24 is positioned at side one side near refrigerating chamber 2, so the back side and the left surface ground of cold air contact low-pressure chamber 24 cool off.
Like this, low-pressure chamber 24 is indirectly cooled by its outside because of cold air.Therefore, suppress the convection current of cold air by reducing pressure, thereby and rise by the temperature of in closed container, cooling off connection indirectly, disconnecting the switching of door of the influence that produces and refrigerator and defrosting etc. for compressor, also can suppress harmful effect to its internal temperature, the state that therefore, can keep high humidity with constant temperature.Have, the cold air after refrigerated compartment 2 integral body also is inhaled into cold air return port 33 again.
In addition, at the rear of ice making water tank 22 ice making water pump 28 is set.Configuration is used for the negative pressure pump 29 as decompressor one example with low-pressure chamber 24 decompressions in the space of the side, rear portion of the rear of receiver 23 and low-pressure chamber 24.This negative pressure pump 29 is connected to the pump connecting portion that is provided with in low-pressure chamber 24 sides by conduit.
In addition, as above-mentioned shown in Figure 2, above-mentioned low-pressure chamber 24 constitutes to be possessed: the case shape low-pressure chamber main body 40 with the peristome (food picks and places and uses peristome) that picks and places food and use; The food that opens and closes low-pressure chamber main body 40 picks and places the low-pressure chamber door 50 of using peristome; And food is accommodated in it is inner and debouch food service tray 60 in the low-pressure chamber by low-pressure chamber door 50.That is, in low-pressure chamber main body 40, pick and place by the food of closing this low-pressure chamber door 50 and to use peristome, thereby the low-voltage space that is depressurized as the space that surrounds with low-pressure chamber main body 40 and low-pressure chamber door 50 forms.Have, food service tray 60 is installed in the rear side of low-pressure chamber door 50 again, can be accompanied by moving of low-pressure chamber door 50 and moves forward and backward.
In addition, the antioxidant content that antioxidant 81 (not shown) is housed in the inside of low-pressure chamber 24 is provided with is emitted box 80.In other words, the antioxidant content that the antioxidant 81 that prevents the oxidational losses that causes because of the oxygen in its inner air is housed in being provided with in the low-pressure chamber 24 of preserving fresh food such as vegetables, meat and fish is emitted box 80.As shown in Figure 2, this antioxidant content is emitted box 80 and is engaged in dismantledly in the back wall portion of food service tray 60.As antioxidant 81, use the antioxidant of under the basis of the pressure state of not emitting antioxidant content under the basis of atmospheric pressure state and forcing down, emitting antioxidant content than atmosphere.That is, in be contained in antioxidant content and emit antioxidant 81 in the box 80 by to reducing pressure in the low-pressure chamber 24, utilize antioxidant content to emit box 80 pressure inside and antioxidant content and emit the pressure differential of the pressure of box 80 outsides and emit antioxidant content.
And, with regard to low-pressure chamber 24, thereby become air-tight state by on its food service tray 60, placing food and closing low-pressure chamber door 50 its inside, have again, to connect door switch and drive negative pressure pump 29, low-pressure chamber 24 is depressurized the state that forces down than atmosphere.Like this, the oxygen concentration in the storeroom 13 descends, and can prevent the deterioration of nutritional labeling in the food.
And, be sealed the state that becomes decompression at low-pressure chamber 24 after, begin to emit antioxidant content from antioxidant 81, thereby, be defined in the low-pressure chamber 24 of volume at it, can carry out preventing the nutritional labeling in the food and the combination of oxygen by what antioxidant content carried out.Its result, can realize that antioxidant content emits the miniaturization of the miniaturization of box 80, negative pressure pump 29, there is the intensity of the casing that can realize low-pressure chamber 24 to reduce again, increase and the cost of realizing food storing space reduce, and the oxidative degradation of the nutritional labeling in the food that can prevent to take in the inside of low-pressure chamber 24 in long-time.
And, if before moving above-mentioned low-pressure chamber door 50 to hand, then at first, being located at the decompression state that pressure relief valve on the part of low-pressure chamber door 50 moved and removed low-pressure chamber 24, its result becomes atmospheric state, can open low-pressure chamber door 50.Therefore, can open low-pressure chamber door 50 and pick and place food simply.
Secondly, use appended Fig. 4 to come the controlling organization of the temperature transition of refrigerator of the present invention is described.Have, this Fig. 4 is the controlling party block diagram of summary structure of controlling organization of the refrigerator of expression present embodiment again.
In the drawings, for example, the temperature that the temperature control equipment 45 that is made of microcomputer etc. will be detected by the temperature sensor 42 of the internal temperature that detects above-mentioned low-pressure chamber 24 and by can be in the temperature of temperature regulation section 44 settings of its temperature of conversion between ice Wen Wendu band and the refrigerated storage temperature band as input, promptly, according to these temperature, to damper device 41 and heater 43 output control signals.
More specifically, under the low situation of the detected temperatures of temperature sensor 42, the aperture by reducing damper device 41 or close is fully controlled (inhibition) air conditioning quantity.In addition, under the low excessively situation of temperature, make heater 43 energisings and temperature is risen.Under the too high situation of the detected temperatures of temperature sensor 42, increase the aperture of damper device 41, thus the temperature in the reduction of the cold air free air space cool-air feed to low-pressure chamber 24 in the low-pressure chamber 24.
Have, for improving the serviceability of above-mentioned low-pressure chamber, be configured on the refrigerator doors 6 by the guidance panel with temperature transition, the user does not open door and just carries out temperature transition by this temperature regulation section 44 simply and become possibility.When operation, also can come the user is informed the temperature band by the position of changing the light of lighting in each temperature.
Also have, use appended Fig. 5 that the solidification point of food and the relation of nutritional labeling are described.Have again, here, be put in the food materials washiness of refrigerated storage temperature band, thereby be easy to freeze, for example, can enumerate vegetables and dairy products and processed food etc.Usually, the water content of vegetables is about 90%, and its chill point is 0 ℃～1 ℃.In addition, the temperature in the preservation is more effective on quality keeps near solidification point as far as possible.
Fig. 5 represents storage temperature and the ascorbic relation of vegetables.As the example of vegetables, to use to contain a lot of vitamin Cs, respiratory capacity is also many, is suitable for the cauliflower that low temperature is preserved.The initial stage water content of this cauliflower is 91%.Chill point is-0.6 ℃.Condition during as preservation from-2 ℃ to 1 ℃, in the air themperature every 1 ℃ of setting storeroom, was under low pressure preserved four days down with atmospheric pressure, carried out the comparison of the ascorbic survival rate % of vegetables thereafter.Be 100% to calculate with the survival rate at initial stage respectively.
In the bar graph of figure, mark 51 is illustrated in temperature-2 ℃ and the ascorbic survival rate of occasion is preserved in decompression down, 52 are illustrated in temperature-1 ℃ and the ascorbic survival rate of occasion is preserved in decompression down, 53 are illustrated in the ascorbic survival rate of preserving occasion under 0 ℃ of temperature and the decompression, 54 are illustrated in the ascorbic survival rate of preserving occasion under 1 ℃ of temperature and the decompression, 55 are illustrated in temperature-2 ℃ but atmospheric pressure is preserved the ascorbic survival rate of occasion down, 56 are illustrated in temperature-1 ℃ but atmospheric pressure is preserved the ascorbic survival rate of occasion down, 57 are illustrated in 0 ℃ of temperature but the following ascorbic survival rate of preserving occasion of atmospheric pressure, and 58 are illustrated in 1 ℃ of temperature but the following ascorbic survival rate of preserving occasion of atmospheric pressure.
Have again, after preservation, confirm to freeze influence the time, under the condition below the temperature-1 ℃, part can be seen and freeze.In addition, according to Fig. 5, the vitamin C of vegetables under reduced pressure, all be maximum under the atmospheric pressure, if only confirmed thus otherwise freeze to preserve the effect that the vitamin C that then can be inhibited reduces at low temperature 0 ℃ of surplus.Thereby this can think to reduce by preserve the respiration make vegetables at low temperature, thereby the consumption of the composition in the vegetables diminishes, so suppress ascorbic rotten.In addition, store down, we can say that the preservation of comparing under atmospheric pressure has the effect that suppresses the vitamin C deterioration according to decompression.
This can think to descend by the decompression oxygen concentration, and ascorbic oxidation is inhibited, and has again, and respiratory capacity also reduces thus, so can obtain ascorbic degradation inhibiting.Have after freezing, because the damage of pair cell can be confirmed the tendency that vitamin C reduces, its result becomes the have or not result that produce inhomogeneous (fluctuation) of ascorbic value because of freezing again.As from the foregoing, because there is the possibility of freezing in vegetables in 0 ℃～-1 ℃ temperature range, this refrigerated storage temperature is above to be preserved so be desirably in.
Secondly, to preserve beef, confirm the influence of the pair cell that causes by temperature, cooling structure as an example.As mentioned above, at ice Wen Wendu band, storage is important in very narrow temperature province, if temperature change is big, then food frozes for a second time, thaws, and descends thereby produce quality.So the keeping quality for the meat of icing warm temperature province carries out the affirmation of cell grade.Have again,, observe the inside of beef, carry out comparison because of the meat deterioration of ice crystal due to generating with SEM (low vacuum electron microscope) as its method.
SEM observes and to carry out under three situations, with (1) initial stage, (2) decompression down under (but temperature=-1 ℃, temperature change ± 0.5 ℃), (3) atmospheric pressure (but temperature=-1 ℃, temperature change ± 2.0 ℃) compare.Have again,, SEM is observed image carry out the image processing, obtain the voidage of muscle cell as observational technique.Appended Fig. 6 represent based on the SEM image that so obtains carry out result that image handles and, the result of calculation of the voidage of resulting cell.
As can be seen from Figure 6, the voidage of cell is (before preserving) average out to 34.7% in the early stage, under reduced pressure is 39.2%, and, under atmospheric pressure be 56%.That is, the voidage after the preservation is all bigger than the initial stage, and deterioration takes place.But, during after relatively preserving both, then confirm the effect of the generation (quantity in hole and size, intercellular gap etc.) that vacuum one side obviously can reduce the space.
Temperature change reduces for the influence of ± 0.5 ℃ scope pair cell tissue but under the situation of under atmospheric pressure temperature=1 ℃ under the situation of under reduced pressure temperature=-1 ℃, temperature change can be thought the result that moisture frozes for a second time, thaws more greatly for ± 2.0 ℃, ice crystal is grown greatlyyer, therefore, can think that tissue damage must be bigger.Have, the size in the hole from the image of figure can think that also under atmospheric pressure intracellular hole is big, and intracellular freezing is clearly taking place again.
In addition, quantity, the size in hole that becomes the reason of wizened mouthfeel when eating beef and delicious variation further suppressed by under reduced pressure preserving, so especially, according to the preservation under reducing pressure by indirect cooling structure and suppress the harmful effect that is caused by temperature and think and preserve by high humidity, suppressing becomes possibility because of the growth of ice crystal to the preservation of the cytoclasis of food cell.In addition,, can also be suppressed at dripping of the delicious composition that flows out when thawing, thereby delicious thawing also becomes possibility by suppressing cytoclasis.
As mentioned above, in the temperature band of this temperature control difficulty that is called as ice Wen Wendu band, thereby above-mentioned low-pressure chamber becomes air-tight state by closing this its inside of low-pressure chamber door, thereby not can because of refrigerator the door switching its internal temperature is easily changed, and, by its inner pressure relief being suppressed the so-called cooling indirectly of its inner cold air convection current, thereby can suppress temperature change, thereby, the impact cell that the growth of the ice crystal of food causes can be suppressed, and its freshness and quality can be kept well.
In addition, and under the lower so-called part of the temperature after making conversion from the ice Wen Wendu band situation about freezing, because the portion of water in the food freezes, thereby the concentrating of the inside and outside generation composition of cell, microorganism is difficult to breeding.That is, though storage time is elongated, repeat the generation and the growth of ice crystal in preservation, so As time goes on and pair cell produces damage, the taste when edible descends slightly.So, under situation, preserve at above-mentioned ice Wen Wendu band with 2 days or the 3 days cooking, perhaps, preferably it is suitably distinguished use edible at once but under the situation of carrying out preserving about a week, preserve at the temperature band that above-mentioned part is freezed.
Have, in vegetables and fruit, if with several ℃～10 ℃ storages, produce unusually at biomembranous state, the function of cell is destroyed, and so-called brown stain, organization softening, indenture low temperature obstacles such as (ピ Star テ イ Application グ) take place.So, for this type of summer vegetable such as cucumber, eggplant for example, more set on the highland by the temperature that will refrigerate conversion, the low temperature obstacle can not take place then, can keep its freshness.
In addition, preserve at the same time under the situation of meat and vegetables, consider the influence freeze, it is desirable to be transformed into refrigerated storage temperature and bring and preserve.And, the inside that is accommodated in sealing bag etc. is thus under reduced pressure when the food preservation of this bag expansion is in above-mentioned low-pressure chamber, for example, by removing pressure reducing mode, the vavuum pump ground of also can being failure to actuate is preserved, like this, can suppress the expansion of collecting bag and break and consequent harmful effect, and can preserve safely and effectively other food.
Claims (10)
1. a refrigerator has a plurality of storerooms, freeze cycle in main body, and formation will is characterized in that from the cold air of the above-mentioned freeze cycle cold air path to above-mentioned a plurality of storerooms guiding,
At least a portion of above-mentioned a plurality of storerooms possess with its inside with respect to the outside airtight storage space, and,
Constitute above-mentioned cold air path in the mode that the temperature of above-mentioned storage space can be set at ice Wen Wendu band by above-mentioned freeze cycle.
2. refrigerator according to claim 1 is characterized in that,
Above-mentioned cold air path constitutes the above-mentioned storage space of indirect cooling.
3. refrigerator according to claim 2 is characterized in that,
Above-mentioned storage space possesses the mechanism of decompressor that will reduce pressure in the low-pressure chamber, and this low-pressure chamber is the low low-pressure chamber of its built-in pressure ratio external pressure.
4. refrigerator according to claim 3 is characterized in that,
Above-mentioned low-pressure chamber constitutes, except above-mentioned ice Wen Wendu band also can and the refrigerated storage temperature band between design temperature selectively.
5. refrigerator according to claim 4 is characterized in that,
The post-decompression air pressure of above-mentioned low-pressure chamber is controlled to be 0.7 air pressure～0.9 air pressure.
6. refrigerator according to claim 5 is characterized in that,
Humidity in the above-mentioned low-pressure chamber is controlled to be 70%～99%.
7. refrigerator according to claim 6 is characterized in that,
The mechanism of decompressor that in above-mentioned low-pressure chamber, also has the oxygen concentration that reduces this low-pressure chamber inside.
8. refrigerator according to claim 3 is characterized in that,
Thereby above-mentioned low-pressure chamber is located at the action of damper device of the part of above-mentioned cold air path and is changed between above-mentioned ice Wen Wendu band and above-mentioned refrigerated storage temperature band by control.
9. refrigerator according to claim 8 is characterized in that,
Above-mentioned low-pressure chamber possesses heater, the temperature sensor that detects the temperature in the above-mentioned low-pressure chamber and the temperature regulation section of regulating above-mentioned low pressure indoor temperature on its part, also possess the control device of controlling the action of above-mentioned heater and above-mentioned damper device according to the temperature after regulating by the temperature of said temperature sensor detection with by the said temperature adjusting portion.
10. refrigerator according to claim 9 is characterized in that,
Above-mentioned control device is controlled so that the temperature in the above-mentioned low-pressure chamber is in above-mentioned design temperature ± temperature change amplitude of 1 ℃.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009206848A JP5384259B2 (en) | 2009-09-08 | 2009-09-08 | refrigerator |
| JP2009-206848 | 2009-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102012142A true CN102012142A (en) | 2011-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101146924A Pending CN102012142A (en) | 2009-09-08 | 2010-02-10 | Refrigerator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5384259B2 (en) |
| KR (1) | KR101158736B1 (en) |
| CN (1) | CN102012142A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849067A (en) * | 2019-09-16 | 2020-02-28 | 长虹美菱股份有限公司 | Control method of refrigerator with ice temperature fresh-keeping function |
| CN112984911A (en) * | 2019-12-16 | 2021-06-18 | 东芝生活电器株式会社 | Refrigerator with a door |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5629648B2 (en) * | 2011-06-20 | 2014-11-26 | 日立アプライアンス株式会社 | refrigerator |
| JP5753743B2 (en) * | 2011-07-19 | 2015-07-22 | 日立アプライアンス株式会社 | refrigerator |
| JP5677913B2 (en) * | 2011-08-30 | 2015-02-25 | 日立アプライアンス株式会社 | refrigerator |
| JP5698647B2 (en) * | 2011-11-15 | 2015-04-08 | 日立アプライアンス株式会社 | refrigerator |
| CN115111841A (en) * | 2016-12-02 | 2022-09-27 | 海尔智家股份有限公司 | Refrigerating and freezing equipment |
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| CN112984911B (en) * | 2019-12-16 | 2022-09-20 | 东芝生活电器株式会社 | Refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011058670A (en) | 2011-03-24 |
| JP5384259B2 (en) | 2014-01-08 |
| KR20110027527A (en) | 2011-03-16 |
| KR101158736B1 (en) | 2012-06-22 |
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Application publication date: 20110413 |