CN102840734B - Refrigerator - Google Patents

Abstract

The aim of the invention is to provide a refrigerator capable of storing foods in a best temperature range according to food kinds. A storage unit (24) capable of preventing gas from moving outside is arranged in a storage chamber in a refrigerator main body (1), and the refrigerator comprises a detection component (42) for detecting the kinds of the food stored in the storage unit (24), and a control component for controlling the storage unit (24) in more than two different temperature ranges according to the kinds of the food detected by the detection component (42).

Description

Refrigerator

Technical field

The present invention relates to refrigerator.

Background technology

Thereby food reacts and is oxidized with airborne oxygen in preservation.Especially, the DHA containing in a large number in fish contacts with airborne oxygen with the vitamin C containing in vegetables etc. with the partial amino-acid containing in unrighted acid, the meats such as EPA, thereby is lost.So, conventionally adopt following technology: by effectively utilizing vacuum bag and antioxidant etc., thereby prevent the oxidation of nutritional labeling by reducing oxygen concentration more.

As an one example, in the past, for example, according to following patent documentation 1, known a kind of refrigerator: by drawing the air in the closed container in refrigerator with vavuum pump, reduce the amount of oxygen of internal tank, and suppress that the oxidation of nutritional labeling causes rotten., the refrigerator that this patent documentation 1 is recorded prevents that according to food icing viewpoint from making the temperature in case is refrigerated storage temperature band, and improves the maintenance function of the freshness of the food such as the flesh of fish, dairy products, vegetables and fruit.

Patent documentation 1: JP 2009-8292 communique

But, in the technology of patent documentation 1, the temperature band of low-pressure chamber is set as refrigerated storage temperature band, therefore being suitable for most freezing temperature is near the storage of fruits and vegetables and dairy products etc. 0 DEG C, but, because meat is less with fish moisture compared with vegetables etc., therefore differ and deserve to be called surely suitable Temperature Setting.

Conventionally, the temperature band during for food preservation, as long as food does not freeze, the more low activity that more can suppress the enzyme in food of temperature, thereby keeping quality improves.If the activity of the enzyme in food is suppressed, can there is not the decomposition that enzyme causes, biological respinse also reduces, and therefore can suppress the minimizing of nutritional labeling.

Here, the various researchs of carrying out according to the present inventor, and learn following thing.

The contained nucleotides (ATP, ADP etc.) of fresh fish and shellfish is decomposed in storage, especially, mainly becomes IMP in fish.In the time that decomposition is proceeded, become inosine and hypoxanthine, thereby become the reason that produces bad smell.Phosphatide is easy to decompose compared with neutral lipides in refrigeration, generates free fatty, becomes the oxidation of food and the reason of protein denaturation.So, if the lower preservation of the temperature of 0 DEG C～-5 DEG C of freezing more low temperature and meat and fish (following, to be called in the present embodiment " ice Wen Wendu band ") can inhibitory enzyme be reacted and improves keeping quality.

On the other hand, the temperature of each storeroom of refrigerator rises along with switching, the defrosting etc. of door, or the Local cooling causing because of the cold air blow-off outlet arranging at multiple positions and/or the intermittent working of compressor produce inhomogeneities, are therefore difficult to be adjusted into suitable temperature.Especially, in the situation that rising ice temperature storage, there is the temperature of the presumptive area of refrigerator inside to remain the problem very difficult in reality that is controlled at of certain temperature (, ice Wen Wendu band).

Especially, the maximum ice crystallization generating zone that the ice crystal in the ice Wen Wendu of 0 DEG C～-5 DEG C band or food is grown up most, therefore at this ice Wen Wendu band, because the generation of ice crystal destroys the cell of food, easily produces damage.That is, if larger in this ice Wen Wendu band variations in temperature, food repeatedly freezes, thaws, and the little ice crystal existing in cell moves to extracellular and interosculates, and produces large crystallization.According to this character, the problem that exists ice crystal to become to look larger.

Like this, according to the preservation at above-mentioned ice Wen Wendu band, breeding that on the one hand can anti-bacteria, but then in the situation that its variations in temperature is large, thereby produces and damages cell because food ice crystal in storage recrystallizes the impact waiting.Therefore, occur that seepage (De リ Star プ) flows out and the minimizing of delicious composition, or moisture runs off and makes the problems such as mouthfeel decline (for example, wizened) from food.

In addition, especially, in the case of the storeroom of direct cooled, dried air contacts with food surface, promotes to be dried, and causes the variable color of food surface, have again, air is easy to enter in cell dry and that surface area increases, and its result likely causes that the freshness of the oxidation promotion etc. of lipides changes.

Summary of the invention

The present invention is in view of the problem of above-mentioned prior art and develop, and its objective is to provide can carry out according to the refrigerator of the preservation of the optimum temperature band of food variety.

For addressing the above problem, for example, adopt the following structure of recording.Although the application comprises multiple means that address the above problem, but, enumerating an example is: in the storeroom in refrigerator main body, possess the housing unit that gas moves to outside in inside, this refrigerator possesses the detection means of the kind that detects the food preserved in above-mentioned housing unit and the control member that is plural different temperatures band according to the kind of the food with above-mentioned detection means detection by above-mentioned housing unit control.

According to the present invention, can provide and can carry out according to the refrigerator of the preservation of the optimum temperature band of food variety.

Brief description of the drawings

Fig. 1 is the central longitudinal sectional view of the refrigerator of one embodiment of the present invention.

Fig. 2 is the sectional block diagram of the orlop space segment of the refrigerating chamber shown in Fig. 1.

Fig. 3 is the front view of the backplate of the refrigerating chamber shown in Fig. 1.

Fig. 4 is the different figure of explanation because of the carbon dioxide generating amount due to food.

Fig. 5 is the cutaway view of the negative pressure pump shown in Fig. 2.

Fig. 6 is that explanation is preserved vegetables and made negative pressure pump continuous operation and intermittent working until the different figure of carbon dioxide detected value when predetermined pressure.

Fig. 7 is that explanation is preserved meat and made negative pressure pump continuous operation and intermittent working until the different figure of carbon dioxide detected value when predetermined pressure.

Fig. 8 is the controlling party block diagram that represents the Control the content of the refrigerator of embodiment.

Fig. 9 is the figure that represents the ascorbic measurement result of the cauliflower changing because of the difference of storage temperature and cooling structure.

Figure 10 is the difference representing according to cooling structure (range of temperature), and the beef cell by storage after three days is observed with SEM, carries out image processing and extracts ice pellets out and obtain the figure of the result of voidage.

Description of reference numerals:

1-refrigerator main body, 24-low-pressure chamber (housing unit), 40-low-pressure chamber main body, 41-damper device, 42-carbon dioxide sensor (carbon dioxide detection means, detection means), 43-heater, 44-temperature regulation section, 45-control device, 50-low-pressure chamber door.

Detailed description of the invention

Embodiments of the invention are described with reference to the accompanying drawings.

(embodiment 1)

First, limit sees figures.1.and.2, and limit describes the structure of refrigerator.Have, Fig. 1 is the central longitudinal sectional view of the refrigerator of present embodiment again, and Fig. 2 is the sectional stereogram of the orlop space segment of the refrigerating chamber shown in Fig. 1.

Refrigerator possesses refrigerator main body 1 and forms at the multiple door 6～9 of its front surface setting.Refrigerator main body 1 comprises foamed polyurethane insulating material 13 and the vacuum heat insulation materials (not shown) that the outer container 11 of steel plate system, resinous interior case 12, between are filled, and is formed with multiple storerooms from the top of figure with the order of refrigerating chamber 2, refrigerating chamber 3,4, vegetable compartment 5.In other words, respectively, divide configuration refrigerating chamber 2, divide configuration vegetable compartment 5 at orlop in the superiors, between refrigerating chamber 2 and vegetable compartment 5, dispose and refrigerating chambers 3,4 from this two chambers heat isolation.Refrigerating chamber 2 and vegetable compartment 5 are storerooms of refrigerated storage temperature band, and refrigerating chamber 3,4 is storerooms of 0 DEG C of following cryogenic temperature band (the temperature bands of for example, approximately-20 DEG C～-18 DEG C).This storeroom 2～5 is divided by next door 33,34,35.

As mentioned above, on the front surface of refrigerator main body 1, be respectively equipped with door 6～9 for sealing the front openings portion of multiple storerooms 2～5.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 up of the double door of opposite opened, and refrigerating chamber door 7, refrigerating chamber door 8, vegetable compartment door 9 are made up of the door of drawer type, and becomes the container in storeroom and the together structure of pull-out of pull-out door.

In the refrigerator main body 1 of said structure, be provided with freeze cycle.This freeze cycle is linked in sequence compressor 14, condenser (not shown), capillary (not shown) and evaporimeter 15 to form with this to compressor 14 again.Compressor 14 and condenser are arranged in the Machine Room of the lower backside of being located at refrigerator main body 1.Evaporimeter 15 is arranged on that to be located at the cooler at refrigerating chamber 3,4 rears indoor, above the evaporimeter 15 of this cooler chamber, is provided with blower fan 16.

, carried to refrigerating chamber 2, refrigerating chamber 3,4 and the each storeroom of vegetable compartment 5 by air blast blowing fan 16 via not shown here cold air path by the cooled cold air of evaporimeter 15.Particularly, the cold air of being carried by blower fan 16 is carried its part through single or multiple dampers to be opened/closed to the storeroom of the refrigerated storage temperature band of refrigerating chamber 2 and vegetable compartment 5, and, a remaining part is carried to the storeroom of the cryogenic temperature band of refrigerating chamber 3,4.

After the cold air carried to the each storeroom of refrigerating chamber 2, refrigerating chamber 3,4 and vegetable compartment 5 by blower fan 16 is cooling in by each storeroom, turn back to cooler chamber by cooling return path.Like this, the refrigerator that present embodiment relates to has the loop structure of cold air, and, each storeroom 2～5 is maintained to suitable temperature.

In addition, in refrigerating chamber 2, be removably provided with the step shelf 17～20 being formed by transparent resin plate.Undermost shelf 20 is arranged to contact with two sides with the back side of interior case 12, will demarcate from superjacent air space as the orlop space 21 of its lower side space.In addition, the door pocket 25～27 of multilayer is set in the inner side of each refrigerating-chamber door 6, these pockets 25～27 are arranged under the state after closing cold room door 6 interior outstanding to refrigerating chamber 2.Be provided with backplate 30 at the back side of refrigerating chamber 2, this backplate 30 is formed with the path that the cold air of supplying with from blower fan 16 is passed through.

As shown in Figure 2, in orlop space 21, be respectively arranged with successively from a left side for the ice making water receptacle 22 of the ice making tray the supply system frozen water to refrigerating chamber 3, for receiving the receiver 23 of the food such as dessert and the freshness of food keeps and the long-term low-pressure chamber 24 of preserving for indoor pressure-reducing is carried out.Low-pressure chamber 24 has the transverse width less than the transverse width of refrigerating chamber 2, configures adjacently with the side of refrigerating chamber 2.Have again, can be clear and definite from figure: this low-pressure chamber 24 is to surround it by wall and door to be formed as airtight structure around, therefore, can make its inner air pressure than outside low.

In ice making water receptacle 22 and the left side of receiver 23 in Fig. 2, be configured in the rear of refrigerating-chamber door 6 (Fig. 1).Like this, only, by opening the refrigerating-chamber door 6 in left side, just can pull out ice making water receptacle 22 and receiver 23.In addition, low-pressure chamber 24 is configured in the rear of refrigerating-chamber door 6 in the right side of figure.Like this, only by closing the refrigerating-chamber door 6 on right side, the food service tray 60 that just can make low-pressure chamber 24 from pull-out state injury-free turn back to precalculated position.Have, these ice making water receptacles 22 and receiver 23 are positioned at the rear of the undermost door pocket 27 of refrigerating-chamber door 6 in Fig. 1 again, and low-pressure chamber 24 is also positioned at the rear of the undermost door pocket 27 of refrigerating-chamber door 6.

Secondly, the details of the backplate 30 shown in Fig. 1 is described with Fig. 3.On this backplate 30, be provided with: to the cold gas exhausting outlet 31 (the first cold gas exhausting outlet) of the cooling use of refrigerating chamber of refrigerating chamber 2 cool-air feeds; To the cold gas exhausting outlet 32 (the second cold gas exhausting outlet) of the cooling use of low-pressure chamber of orlop space 21 cool-air feeds of refrigerating chamber 2; With cold air return port 33.Cold air return port 33 be positioned at the rear, the back side of low-pressure chamber 24 approach refrigerating chamber 2 side one side arrange.

In addition, cold gas exhausting outlet 32 arranges towards the gap of the upper surface of low-pressure chamber 24 and the lower surface of shelf 20.The cold air ejecting from cold gas exhausting outlet 32 flows the gap of the upper surface of low-pressure chamber 24 and the lower surface of shelf 20, from cooling low-pressure chamber 24 above.Therefore, indirectly cooling to carrying out in low-pressure chamber 24.

In addition be provided with for controlling cold air to the interior mobile damper device 41 of low-pressure chamber 24 by upstream side than cold gas exhausting outlet 32.The switching of this damper device 41 is controlled by not shown control device, like this, can control the cold air supply mobile to low-pressure chamber 24.

Have again, as shown in Figure 1, for making the temperature rise in low-pressure chamber 24, be provided with for example heater 43.This heater 43 is located in the perspective plane, below in low-pressure chamber 24, and in the present embodiment, the bottom surface in employing and low-pressure chamber 24 is the heater of same degree area substantially.

Also have, here, low-pressure chamber 24 is approached refrigerating chamber 2 right flank configure and eliminate the gap on low-pressure chamber 24 right sides, and the gap in not shown shelf (next door) elimination low-pressure chamber 24 left sides is set in the left part of the upper surface of low-pressure chamber 24, and the cold air therefore ejecting from cold gas exhausting outlet 32 can and not flow at the upper surface of low-pressure chamber 24 to the left and right side shunting of low-pressure chamber 24.Like this, by increasing, the upper surface of low-pressure chamber 24 is carried out to cooling air conditioning quantity, thereby in the quick cooling low-pressure chamber 24 of energy.Cooled the upper surface of this low-pressure chamber 24 cold air is inhaled into cold air return port 33 from the left surface of the front process low-pressure chamber 24 of low-pressure chamber 24, turns back to cooler chamber through supercooling return path.Be positioned at the rear, the back side of low-pressure chamber 24 approach refrigerating chamber 2 side one side cold air return port 33 is set, therefore cold air contacts with left surface and carries out cooling with the back side of low-pressure chamber 24.

Like this, low-pressure chamber 24 is because cold air is through its outside being indirectly cooled.Therefore, suppress the convection current of cold air by decompression, thereby and by carry out cooling opening/closing the produced impact for compressor indirectly in closed container, the situation of temperature rise with switching and the defrosting etc. of the door of refrigerator, also its harmful effect to internal temperature can be suppressed, the state of high humidity can be kept with constant temperature.Have, the cold air of refrigerated compartment 2 entirety is also inhaled into cold air return port 33 again again.

In addition, be provided with ice making water pump 28 at the rear of ice making water receptacle 22.In the space of the rear of receiver 23 and the rear side of low-pressure chamber 24, dispose the negative pressure pump 29 of the example as decompressor for low-pressure chamber 24 is reduced pressure.This negative pressure pump 29 is connected with the pump connecting portion that the side at low-pressure chamber 24 arranges by means of conduit.

In addition, as shown in Figure 2, the formation of above-mentioned low-pressure chamber 24 possesses: the low-pressure chamber main body 40 with the case shape of the peristome (food access peristome) that the access of food uses; The low-pressure chamber door 50 that the food access of low-pressure chamber main body 40 is opened and closed with peristome; With by food storage therein and by low-pressure chamber door 50 to depositing in low-pressure chamber or from the food service tray 60 of its taking-up.That is, in low-pressure chamber main body 40, by closing the food access peristome of this low-pressure chamber door 50, thus the low-voltage space that the space that is formed as being surrounded by low-pressure chamber main body 40 and low-pressure chamber door 50 is depressurized.Have, food service tray 60 is arranged on the rear side of low-pressure chamber door 50 again, and can move forward and backward along with moving of low-pressure chamber door 50.

And low-pressure chamber door 24 is by loading of pieces on its food service tray 60 and close low-pressure chamber door 50, make its inside become air-tight state, then have, door switch is connected and driven negative pressure pump 29, low-pressure chamber 24 is reduced pressure as the state forcing down than atmosphere.Like this, the decline of the oxygen concentration in storeroom 13 can prevent that the nutritional labeling in food is deteriorated.

And, if by front of low-pressure chamber door 50 moves to, first moving at the pressure relief valve of the part setting of low-pressure chamber door 50, the decompression state of low-pressure chamber 24 is disengaged, and its result becomes atmospheric state, can open low-pressure chamber door 50.Like this, can open simply low-pressure chamber door 50 and carry out the access of food.

Secondly, with Fig. 4, to Fig. 7, the details of the detection means to food describes.Fig. 4 is the figure that measures the rheological parameters' change with time of the gas concentration lwevel in the low-pressure chamber 24 shown in Fig. 2 with carbon dioxide sensor.

In Fig. 4, the variation of carbon dioxide sensor value when 600g spinach is preserved in 61 expressions.The variation of carbon dioxide sensor value when 200g spinach is preserved in 62 expressions.The variation of the carbon dioxide sensor value when sack of placing three salmon flakes on three foam styrene pallets of selling in supermarket is preserved in 63 expressions.

Under each condition, from starting mensuration until measure empty state through after one minute time, after after one minute, preserving food, measure the variation of carbon dioxide sensor.

As can be seen from Figure 4, if spinach is saved in low-pressure chamber 24, gas concentration lwevel rises in time.On the other hand, do not observe the increase of salmon flake carbon dioxide.

Its reason is, vegetables are always constantly discharged carbon dioxide because of respiration, in the such dark confined space of low-pressure chamber 24, there is no photosynthesis, can be to container external diffusion yet, and therefore the concentration of carbon dioxide rises in time.

On the other hand, the food beyond the vegetables such as fish can not generate carbon dioxide, even if therefore the time also can not rise through carbon dioxide.Therefore,, if utilize this point, can distinguish vegetables and meat fish.

Secondly, the position that arranges of carbon dioxide sensor is described with Fig. 5.Fig. 5 is the cutaway view of the negative pressure pump 29 shown in Fig. 2.In Fig. 5, the 64th, the substrate of loading carbon dioxide sensor, the 65th, carbon dioxide sensor, the 66th, the exhaust outlet of negative pressure pump 29, the 67th, the box of covering negative pressure pump 29.

If carbon dioxide sensor 65 is arranged in the nearest low-pressure chamber of food, be easy to detect, but low-pressure chamber 24 need to be kept for maintaining the seal of low pressure.So, from low-pressure chamber 24 interior to the external maintenance seal of low-pressure chamber 24 time the consideration of the low voltage sustain performance of lead-out wiring based on guaranteeing low-pressure chamber 24 be difficult.

So, in the present embodiment, make the structure that the air in the low-pressure chamber that makes to discharge from negative pressure pump 29 contacts with carbon dioxide sensor 64.Carbon dioxide sensor 64 shown in Fig. 5 is cylindrical shapes, therefore adopt following structure: process the exhaust outlet of negative pressure pump 29 in the mode of the internal diameter slightly larger than the periphery of carbon dioxide sensor 64, in the exhaust outlet of negative pressure pump 29, pack a part for carbon dioxide sensor 64 into.Having, be not limited to this, if the air of exhaust outlet contacts the test section of carbon dioxide sensor 64 effectively, can be also the structure that exhaust outlet separates with sensor.

Have again, in the present embodiment, be kept at the detection means of the kind that suppresses the food in the housing unit that moves to outside in inside of gas as detection, use carbon dioxide sensor 64, but be not limited to this.For example, can be also the proportion detection means that detects the gas componant detection means of the various gas componants (ethene etc.) that produce from food or detect the proportion of the gas componant in housing unit.

Secondly, with Fig. 6, Fig. 7, the details that detect the situation of gas concentration lwevel at exhaust outlet are described.Fig. 6, Fig. 7 are the figure of the variation of the method for operation of explanation negative pressure pump and gas concentration lwevel at that time.Situation when Fig. 6 represents to preserve spinach, situation when Fig. 7 represents to preserve beef.

Negative pressure pump moves in the time that preservation food is closed the door of low-pressure chamber the door of closing refrigerator main body.With regard to Fig. 6, Fig. 7, using preserve food close low-pressure chamber door and closing refrigerator main body door, negative pressure pump action launching starting point as the elapsed time zero.

In Fig. 6, Fig. 7,68 be illustrated in negative pressure pump 29 from start action and in a continuous manner running until specify pressure time the variation of carbon dioxide sensor value.69 represent negative pressure pumps 29 from start action arrive the pressure of specifying, once stopping and waiting for certain hour after negative pressure pump 29 move again arrive the pressure of appointment and situation about stopping.

In negative pressure pump stops, in low-pressure chamber, maintaining certain pressure scope.As shown in Figure 7, carbon dioxide sensor is because arranging some variation of its detected value of variation (ON/OFF of negative pressure pump 29) of environment.Need to consider this point and can judge.

But, as shown in mark in Fig. 6 68, make negative pressure pump from just putting into food to the short-time running that arrives predetermined pressure, the amplitude of variation of gas concentration lwevel is little.Therefore, judge that vegetables and meat fish are difficult in the little situation of vegetables amount etc.

On the other hand, in the situation of mark 69 (negative pressure pump 29 was once stopping and after wait certain hour, negative pressure pump 29 was being moved again arriving the pressure of specifying and situation about stopping from starting action the pressure that arrives appointment), consistent with mark 68 from dropping into the sensor output starting to stopping, but sensor output value when negative pressure pump is turned round again becomes than starting the value much higher to the sensor output value stopping from input.This,, because because vegetables during negative pressure pump is stopped also being proceeded to breathe, therefore the gas concentration lwevel in low-pressure chamber rises, can detect efficiently the carbon dioxide after concentration rises in the time again starting the driving of negative pressure pump.Therefore, by making negative pressure pump turn round intermittently, wait for that the rising of the gas concentration lwevel in low-pressure chamber makes negative pressure pump again move again, thereby be easy to carry out the difference of vegetables and meat fish.

Secondly, the control member of temperature transition is described with Fig. 8.Have, Fig. 8 is the controlling party block diagram that represents the Sketch of the control member of the refrigerator of the present embodiment again.

In Fig. 8, with regard to the temperature control equipment 45 for example being formed by microcomputer etc., the kind of the food that input is detected by the carbon dioxide sensor 42 of gas concentration lwevel of inside that detects low-pressure chamber 24 and by the temperature that can set in the temperature regulation section 44 that change its temperature between ice Wen Wendu band and refrigerator temperature band, exports control signal according to these temperature to damper device 41 and heater 43.

More specifically, in the case of the detected value of carbon dioxide sensor 42 is high, by reducing the aperture of damper device 41 or it being closed completely, control (inhibition) air conditioning quantity.In addition,, in the situation that temperature is too low, make heater 43 energisings make temperature rise.At the detected value of carbon dioxide sensor 42 low or do not have, increase the aperture of damper device 41, the cold air free air space cool-air feed in low-pressure chamber 24 reduces the temperature in low-pressure chamber 24.

Have again, the relation of freeze (Frozen Knot) temperature and the nutritional labeling of food is described with Fig. 9.Further, here, the food materials of putting into freezing temperature band are due to washiness thereby be easy to freeze, and for example, can enumerate vegetables and dairy products and processed food etc.Conventionally, the moisture amount of vegetables is 90% left and right, and its apparent freezing point is 0 DEG C～-1 DEG C.In addition, to approach as far as possible freezing temperature more effective aspect quality maintenance for the temperature in preservation.

Fig. 9 represents storage temperature and the ascorbic relation of vegetables.As the example of vegetables, use is more containing vitamin C, and respiratory capacity is also more, tends to the cauliflower that low temperature is preserved.The initial stage moisture amount of this cauliflower is 91%.Apparent freezing point is-0.6 DEG C.Condition during as preservation, from-2 DEG C to 1 DEG C, ground, in the air themperature every 1 DEG C of setting storeroom, under reduced pressure with under atmospheric pressure is being preserved during four days, carries out the comparison of the ascorbic residual rate % of vegetables subsequently.Respectively taking the residual rate at initial stage as 100% calculating.

In strip curve map in the drawings, respectively, mark 51 is illustrated in the ascorbic residual rate in the situation of preserving under the decompression of temperature-2 DEG C, mark 52 is illustrated in the ascorbic residual rate in the situation of preserving under the decompression of temperature-1 DEG C, mark 53 is illustrated in the ascorbic residual rate in the situation of preserving under the decompression of 0 DEG C of temperature, mark 54 is illustrated in the ascorbic residual rate in the situation of preserving under the decompression of 1 DEG C of temperature, mark 55 is illustrated in the ascorbic residual rate in the situation of preserving under the atmospheric pressure of temperature-2 DEG C, mark 56 is illustrated in the ascorbic residual rate in the situation of preserving under the atmospheric pressure of temperature-1 DEG C, mark 57 is illustrated in the ascorbic residual rate in the situation of preserving under the atmospheric pressure of 0 DEG C of temperature, mark 58 is illustrated in the ascorbic residual rate in the situation of preserving under the atmospheric pressure of 1 DEG C of temperature.

Have again, in the time that icing impact confirmed in preservation afterwards, under the condition below temperature-1 DEG C, observe icing in a part.In addition, can confirm according to Fig. 9: the vitamin C of vegetables under reduced pressure, all maximum 0 DEG C of residual quantity under atmospheric pressure, therefore preserve with low temperature the effect that the vitamin C that can be inhibited reduces as long as no freezing.This can think, by preserving at low temperatures, and the respiration of vegetables is declined, and the consumption of the composition in vegetables reduces, and therefore can suppress ascorbic deteriorated.In addition, can say, according to the lower storage of decompression, to there is the deteriorated effect of inhibition vitamin C compared with preservation under atmospheric pressure.

Further, the tendency reducing from the damage of cell being confirmed to vitamin C after freezing, its result, becomes ascorbic value due to the result that produces inhomogeneous (fluctuation) that has or not of freezing.According to above content, vegetables are likely frozen in the temperature range of 0 DEG C～-1 DEG C, therefore preferably more than this ice-cold temperature, preserve.

Secondly, as an example, beef is described because of the impact on cell of cooling generation.As mentioned above, at ice Wen Wendu band, in very narrow temperature province, storage is important, if variations in temperature is large, repeatedly carry out food freezing, thaw, produce on the contrary quality and decline.So, for the keeping quality of the meat of ice temperature temperature province, carry out the confirmation of cell grade.Have again, as its method, observe the inside of beef with SEM (low vacuum electron microscope), carry out due to the deteriorated comparison of meat due to the generation of ice crystal.

SEM observes under the decompression of three situation (1) initial stages, (2) (still, temperature=-1 DEG C, variations in temperature ± 0.5 DEG C), under (3) atmospheric pressure (still, temperature=-1 DEG C, variations in temperature ± 2.0 DEG C) compare.Have again, as observational technique, SEM is observed to image and carry out image processing, obtain the voidage of muscle cell.In Figure 10, represent to carry out the result of image processing and the result of calculation of the voidage of the cell obtaining according to the SEM image so obtaining.

According to Figure 10, the voidage of cell is (before preservation) average out to 34.7% in the early stage, is under reduced pressure 39.2%, and, be under atmospheric pressure 56%.That is, the voidage after preservation is all larger than initial stage, rotten underway.But, when two results after relatively preserving, confirm under vacuum to preserve and obviously there is the effect that subtracts areolate generation (gap between the quantity in hole and size, cell etc.).

Temperature (1 DEG C) under reduced pressure, variations in temperature is the scope of ± 0.5 DEG C, and the impact of cell tissue is reduced.But, temperature (1 DEG C) under atmospheric pressure, variations in temperature be ± 2.0 DEG C larger, therefore moisture repeat freeze and thaw, its result, ice crystal become look larger, therefore can think that tissue damage is larger.Have, the size in the hole from the image of figure can think again, under atmospheric pressure, intracellular hole is larger, therefore causes significantly in cell and freezes.

In addition, become the quantity in hole of the reason of wizened mouthfeel while eating beef and delicious variation and large I by under reduced pressure preserving further and suppressed.Can think thus, the preservation under especially reducing pressure by indirect cooling structure to be to suppress the harmful effect due to temperature, and if carry out high humidity preservation, can carry out suppressing the preservation of the cytoclasis that the growth of ice crystal carries out food cell.In addition, by suppressing cytoclasis, the leakage of the delicious composition flowing out can suppress to thaw time, and can thaw palatably.

According to above content, even the temperature band at ice Wen Wendu with such temperature control difficulty, above-mentioned low-pressure chamber also can make its inside become air-tight state by closing its low-pressure chamber door, therefore can its internal temperature easily not changed because of the switching of the door of refrigerator, and by its inner pressure relief, thereby also repressed what is called is indirectly cooling can to carry out the convection current of its inner cold air, thereby can suppress variations in temperature, and the growth that can suppress ice crystal is to the impact cell due to food, and can keep well its freshness and quality.

In addition, in the case of make from ice Wen Wendu band so-called part that temperature conversion is lower freezing, the portion of water in food is freezed, therefore concentrated at the inside and outside generation composition of cell, microorganism is difficult to breeding.That is, although storage time is elongated, repeat generation and the growth of ice crystal in preservation, therefore, along with the process of time produces damage to cell, the mouthfeel when edible is slightly poor.So, preferably as follows it is suitably used respectively,, nursed one's health in two days or three days in the situation that, preserve at above-mentioned ice Wen Wendu band, in the case of at once not edible but carry out the preservation of about a week, in the freezing temperature band preservation of above-mentioned part.

In addition, in vegetables and fruit, in the time of several DEG C～10 DEG C storages, the state of organism film produces abnormal, and the function of cell is destroyed, produces the low temperature infringements such as so-called variable color, organization softening, indenture.So, for example, for the summer vegetable such as cucumber, eggplant, if by the Temperature Setting get Geng Gao of freezing conversion, can not produce above-mentioned low temperature infringement, can keep its freshness.

In addition, preserve at the same time in the situation of meat and vegetables, the impact that consideration is freezed, is preferably transformed into ice-cold (チ Le De) temperature and brings and preserve.And, when being accommodated in the inside of airtight bag etc. and the food of under reduced pressure this bag of expansion and preserving in low-pressure chamber, for example, by removing pressure reducing mode, preserve thereby also can not make vavuum pump action.Like this, can suppress the expansion of collecting bag and break and the consequent harmful effect to other food, and can preserve safely and efficiently.

User, with manually carry out the conversion of temperature band in the situation that, user is lower to pressing the understanding of other solidification point of foodstuff, and under the state of setting arbitrary temperature band for, to carry out hardly the situation of conversion operations more remaining.In this situation, remaining under the state of setting ice Wen Wendu band for, vegetables and washy food freezing are deteriorated, carry out enzyme reaction and oxidative degradation the low meat of refrigerated storage temperature band chill point, fish.

So in the present embodiment, the food that adopts refrigerator automatic decision to preserve, controls the structure of the temperature band of the food for being suitable for having preserved automatically, thereby can comprise the best preservation of the food of meat and fish.

In addition, adopt the structure with the air conditioning quantity of the cold air path around the mode control housing unit of the food of housing unit being preserved under supercooling state or freeze under supercooling state.Like this, in use or preserve time, the in the situation that of food freezing, the moisture of food entirety is freezed equably for fine particle shape, the destruction that therefore can suppress the cell tissue of food.In addition, food entirety is freezed equably, can maintain the mouthfeel of food.In addition, the in the situation that of meat, suppress the leakage while thawing, can keep the delicious composition of food.

(embodiment 2)

In embodiment 2, the low-pressure chamber 24 that under atmospheric pressure uses embodiment 1 to record.The cake being out of shape due to decompression and damaged pudding and aluminium lid, the plastic containers etc. of Yoghourt can under reduced pressure be stored, even if do not reduce pressure, also can by indirectly cooling prevent dry and deteriorated by preserving to suppress freshness than refrigerating chamber low temperature.

In this situation, the air that carbon dioxide detection means can be arranged in low-pressure chamber 24 directly contacts with test section, can also become and make the discharge air of negative pressure pump return to the structure in low-pressure chamber 24 and test section is configured in its path.

Like this, can catch reliably during the course the rising of the carbon dioxide in storeroom.Like this, can detect and have or not vegetables, and can carry out the temperature transition beyond vegetables and vegetables.

(embodiment 3)

In embodiment 3, directly carbon dioxide detection means is set the position of contact at the air of compartment interior.For example, by this storeroom being configured in to the good refrigerator central authorities of serviceability, be much less that the storage of meat fish is very convenient, and the storage of the little vegetables such as the ice-cold food of ham, cheese, delicatessen etc., the salad of cooking, gumbo, purple perilla is also convenient.But, as mentioned above, there is the storage temperature that is suitable for food.That is, vegetables are more than 0 DEG C, meat fish be-3～-1 DEG C for well.In above-mentioned food, what discharge carbon dioxide is vegetables.So, in the elapsed time of utilizing carbon dioxide detection means after storage, detecting that the increase of carbon dioxide, controlling is more than 0 DEG C storage temperature, in the situation that increase not detected, controlling is the storage temperature of-3～-1 DEG C.

In addition, carbon dioxide detection means, in order to detect more accurately, is also arranged in the path of the member that is provided with the air circulation that makes storeroom.

(embodiment 4)

Embodiment 4 is formations that carbon dioxide detection means is set in main vegetable compartment of preserving vegetables and bottled drink etc.As the vegetables of storage, there are the roots vegetables such as the fruit type vegetables such as the leafy vegetable such as spinach and rape, eggplant, cucumber, tomato, carrot and potato.

The optimum temperature of leafy vegetable is that uncongealable minimum temperature is from the best storage temperature of 1 DEG C to 0 DEG C.In addition, fruit vegetable is easy to be subject to low temperature infringement, and 5 DEG C is optimum temperature.

In addition, although vegetables are discharged carbon dioxide because of breathing, respiratory capacity is different because of vegetables, and the respiratory capacity of leafy vegetable is larger than the respiratory capacity of fruit vegetable and fruit, roots vegetable.So, as fruit vegetable by vegetable compartment setting example as inner cap, while improving storage by the seal member of seal etc., the structure internal respiration of seal, becomes the structure that is full of carbon dioxide.The detection means that detects carbon dioxide is set in the inside of this vegetable compartment.In the situation that the discharge rate of carbon dioxide increases in preservation, be judged as leafy vegetable more, be 0 DEG C～3 DEG C by the temperature control in vegetable compartment.In the case of the discharge rate of carbon dioxide is few, roots vegetable and bottled drink etc. are more, are therefore 5 DEG C by storage temperature control.

With regard to leafy vegetable, thereby can suppress the minimizing of nutritional labeling and prevent variable color by reducing storage temperature.In addition, by the low storage temperature that declines at air-tight state, can make saturation water component decline, can suppress moisture and evaporate from vegetables.And, can carry out the withered inhibition of vegetables, can reduce the unhelpful amount of abandoning when cooking.

In addition, the position of carbon dioxide detection means also can be arranged on the refrigerator main body that approaches vegetable compartment bottom surface.In this situation, become following structure: vegetable compartment is positioned at the formation hole, vegetable container bottom surface that carbon dioxide test section is just being gone up under storage state, because carbon dioxide is heavier than air, the therefore contact of the carbon dioxide in vegetable compartment carbon dioxide test section in storage.Like this, the access of vegetable compartment and the taking-up of vegetable container cleaning become may and serviceability good.

From above content, according to each embodiment, storeroom in refrigerator main body possesses the housing unit that inhibition gas moves to outside in inside, and possesses the detection means of the kind that detects the food of preserving at this housing unit and the control member that is more than two different temperatures band by this housing unit control according to the kind of the food being detected by detection means.Like this, can provide the refrigerator that can adopt the ice Wen Wendu of difficulty in structure to be in the past with and to possess the cryopreserved structure having improved of the best of the food that can comprise meat and fish.

In addition, connect at above-mentioned housing unit the exhaust component that a part for the gas in this housing unit is discharged, above-mentioned gas composition detection member is located at the outlet of above-mentioned exhaust component and is detected the gas of discharging from above-mentioned housing unit.

Like this, the ground A.T.C that can conform to the food that is contained in the housing unit of being located at the good position of the serviceability of refrigerating chamber.In addition, improve and preserve the situation of for example vegetables of food that solidification point is different and preserve meat and fish at housing unit in user's serviceability, due to conversion storage temperature automatically, therefore can suppress that vegetables are freezed and deteriorated.Have again, occur to leak thereby the storage temperature that can suppress meat uprises delicious composition is reduced.

In addition, above-mentioned housing unit is to make by above-mentioned exhaust component the low-pressure chamber that built-in pressure ratio external pressure is low.In addition, above-mentioned exhaust component carries out intermittent working until above-mentioned low-pressure chamber becomes predetermined pressure.Like this, the variations in temperature that becomes problem in the time of the food preservation of ice Wen Wendu band is by making low pressure indoor pressure-reducing suppress the convection current of cold air, thereby by suppressing variations in temperature by indirectly cooling low-pressure chamber.

In addition, above-mentioned different temperature band is the arbitrary temperature band between-3 DEG C to+3 DEG C.Like this, can suppress vegetables freezes and goes bad.Have again, occur to leak thereby the storage temperature that can suppress meat uprises delicious composition is reduced.Further, can suppress the impact on food cell that the growth of ice crystal causes.

Have, above-mentioned control member control is with the air conditioning quantity of the cold air path that the mode of cooling above-mentioned housing unit configures indirectly again.Like this, can when humidity is always remained to high humidity, preserve, can suppress dry, variable color and the lipid oxidation etc. of food.

Further, control the air conditioning quantity of above-mentioned cold air path to keep the food of above-mentioned housing unit under supercooling state.Like this, even if can carry out below chill point the preservation under also uncongealable state, thereby can keep freshness.

And, possess the damper device of the air conditioning quantity of controlling above-mentioned cold air path, thereby be above-mentioned different temperature band by controlling this damper device by above-mentioned housing unit control.Like this, can provide and can carry out according to the cryopreserved refrigerator of the best of food variety.Have again, the refrigerator that possesses the structure that can be converted to ice Wen Wendu band and temperature in addition thereof can be provided.

Claims (9)

1. a refrigerator, is characterized in that:

In storeroom in refrigerator main body, possess and suppress the housing unit that gas moves to outside in inside,

This refrigerator possesses: the detection means that detects the kind of the food of preserving in above-mentioned housing unit; With the control member that is plural different temperatures band by above-mentioned housing unit control according to the kind of the food detecting by above-mentioned detection means,

Above-mentioned detection means is the proportion detection means that detects the gas componant detection means of the gas componant producing from food or detect the proportion of the gas componant in above-mentioned housing unit.

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

Above-mentioned gas composition detection member is carbon dioxide sensor.

3. refrigerator according to claim 1, is characterized in that:

Connect at above-mentioned housing unit the exhaust component that a part for the gas in this housing unit is discharged, above-mentioned gas composition detection member is located at the outlet of above-mentioned exhaust component and is detected the gas of discharging from above-mentioned housing unit.

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

Above-mentioned housing unit is to make by above-mentioned exhaust component the low-pressure chamber that built-in pressure ratio external pressure is low.

5. refrigerator according to claim 4, is characterized in that:

Above-mentioned exhaust component carries out intermittent working until above-mentioned low-pressure chamber becomes predetermined pressure.

6. according to the refrigerator described in any one in claim 1 to 5, it is characterized in that:

Above-mentioned different temperature band is the arbitrary temperature band from-3 DEG C to+3 DEG C.

7. according to the refrigerator described in any one in claim 1 to 5, it is characterized in that:

Above-mentioned control member control is with the air conditioning quantity of the cold air path that the mode of cooling above-mentioned housing unit configures indirectly.

8. refrigerator according to claim 7, is characterized in that:

Control the air conditioning quantity of above-mentioned cold air path to keep the food of above-mentioned housing unit under supercooling state.

9. refrigerator according to claim 7, is characterized in that:

Possess the damper device of the air conditioning quantity of controlling above-mentioned cold air path, thereby be above-mentioned different temperature band by controlling this damper device by above-mentioned housing unit control.