CN102840734A

CN102840734A - Refrigerator

Info

Publication number: CN102840734A
Application number: CN2011102598158A
Authority: CN
Inventors: 船山敦子; 高崎寿江
Original assignee: Hitachi Appliances Inc
Current assignee: Hitachi Appliances Inc
Priority date: 2011-06-20
Filing date: 2011-08-31
Publication date: 2012-12-26
Anticipated expiration: 2031-08-31
Also published as: KR101332273B1; CN102840734B; KR20120140174A; JP5629648B2; JP2013002762A

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 with airborne oxygen in preservation and carries out oxidation.Especially, the vitamin C that contains in the partial amino-acid that contains in unrighted acid, the meats such as the DHA that contains in a large number in the fish and EPA and the vegetables etc. contacts with airborne oxygen, thereby is lost.So, technology below usually employing the: through effectively utilizing vacuum bag and antioxidant etc., thereby prevent the oxidation of nutritional labeling through the reduction oxygen concentration more.

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

Patent documentation 1: the spy opens the 2009-8292 communique

But; In the technology of patent documentation 1; Therefore the temperature band of low-pressure chamber is set at the refrigerated storage temperature band, is suitable for freezing temperature most and is near the storage of fruits and vegetables and dairy products etc. 0 ℃, still; Because it is less that meat and fish and vegetables etc. are compared moisture, therefore differing deserves to be called suitable temperature setting surely.

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

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

The nucleotides that fresh fish and shellfish contained (ATP, ADP etc.) is decomposed in storage, especially, in fish, mainly becomes IMP.When decomposition is proceeded, become inosine and hypoxanthine, thereby become the reason that produces bad smell.Phosphatide is compared with neutral lipides and in refrigeration, is easy to decompose, and generates free fatty, becomes the oxidation of food and the reason of protein denaturation.So, if preserve down in 0 ℃～-5 ℃ temperature that more low temperature and meat and fish are not frozen (below, be called " ice Wen Wendu band " in the present embodiment), but then inhibitory enzyme reaction and improve keeping quality.

On the other hand; The temperature of each storeroom of refrigerator is along with the switching of door, defrosting etc. and rise; Perhaps, the part cooling that is caused because of the cold air blow-off outlet that is provided with at a plurality of positions and/or the intermittent working of compressor produce inhomogeneities, therefore are difficult to it is adjusted into suitable temperature.Especially, under the situation of the warm storage of ice that rises, appearance remains the temperature of the presumptive area of refrigerator inside the problem very difficult in the reality that is controlled at of certain temperature (that is ice Wen Wendu band).

Especially, 0 ℃～-5 ℃ ice Wen Wendu band still is the maximum ice crystallization generating zone that ice crystal in the food is grown up most, therefore at this ice Wen Wendu band, because of the generation of ice crystal destroys the cell of food, is easy to generate damage.That is, if bigger in this ice Wen Wendu band variations in temperature, then food freezes repeatedly, thaws, and the little ice crystal that exists in the cell moves and interosculates to the extracellular, produces big crystallization.According to this character, the problem that exists ice crystal to become to look bigger.

Like this, according to the preservation at above-mentioned ice Wen Wendu band, can suppress the breeding of bacterium on the one hand, but then under the big situation of its variations in temperature, thereby because food ice crystal in storage recrystallizes the influence pair cell that waits produces and damage.Therefore, seepage (De リ Star プ) occurs and flow out and the minimizing of delicious composition, perhaps, moisture is from the food loss and make mouthfeel decline problems such as (for example, wizened).

In addition, especially, under the situation of the direct storeroom of cooled; Dried air contacts with food surface, promotes drying, causes the variable color of food surface; Have again; Air is easy to get into drying and in the cell that surface area increases, and its result might cause that the freshness of the oxidation promotion etc. of lipides changes.

Summary of the invention

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

For addressing the above problem, for example, adopt the structure of following record.Though the application comprises a plurality of means that address the above problem; But; Enumerating an instance is: possess in the storeroom in refrigerator main body gas in inside the housing unit to external moving, this refrigerator possess the food that detection preserves in above-mentioned housing unit kind detection means and according to the kind of the food that detects with above-mentioned detection means above-mentioned housing unit is controlled to be the control member of plural different temperatures band.

According to the present invention, the refrigerator that can carry out according to the preservation of the optimum temperature band of food variety can be provided.

Description of 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 refrigerating chamber shown in Figure 1.

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

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

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

Fig. 6 is that explanation is preserved vegetables and made the negative pressure pump different figure of running and the intermittent working carbon dioxide detected value when the pressure be scheduled to continuously.

Fig. 7 is that explanation is preserved meat and made the negative pressure pump different figure of running and the intermittent working carbon dioxide detected value when the pressure be scheduled to continuously.

Fig. 8 is the control block diagram of control content of the refrigerator of expression embodiment.

Fig. 9 is the figure of expression because of the ascorbic mensuration result of the different cauliflowers that change of storage temperature and cooling structure.

Figure 10 be expression according to the difference of cooling structure (range of temperature), the beef cell of storage after three days observed with SEM, carry out image and handle and extract the figure that ice pellets is obtained the result of voidage out.

Description of reference numerals:

The 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.

The specific embodiment

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

(embodiment 1)

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

Refrigerator possesses refrigerator main body 1 and constitutes at a plurality of door 6～9 of its front surface setting.Refrigerator main body 1 comprise steel plate system outer container 11, resinous in case 12, the between foamed polyurethane insulating material 13 and the vacuum heat insulation materials (not shown) of filling, the order from the top of figure with refrigerating chamber 2, refrigerating

chamber

3,4, vegetable compartment 5 is formed with a plurality of storerooms.In other words, respectively,, between refrigerating chamber 2 and vegetable compartment 5, dispose and hot refrigerating

chambers

3,4 of isolating from these two chambers at the superiors' division configuration refrigerating chamber 2, in orlop division configuration vegetable compartment 5.Refrigerating chamber 2 is storerooms of refrigerated storage temperature band with vegetable compartment 5, and refrigerating

chamber

3,4 is storerooms of the cryogenic temperature band (for example, about-20 ℃～-18 ℃ temperature band) below 0 ℃.This storeroom 2～5 is divided by

next door

33,34,35.

As stated, on the front surface of refrigerator main body 1, be respectively equipped with door 6～9 for the front openings portion that seals a plurality of 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 become with the container in the storeroom with pull out the structure that door is together pulled out.

In the refrigerator main body 1 of said structure, be provided with freeze cycle.This freeze cycle is linked in sequence to compressor 14 compressor 14, condenser (not shown), capillary (not shown) and evaporimeter 15 again and constitutes with this.Compressor 14 is arranged in the Machine Room of the lower backside of being located at refrigerator main body 1 with condenser.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, is provided with blower fan 16.

, carry to refrigerating chamber 2, refrigerating

chamber

3,4 and vegetable compartment 5 each storeroom via not shown here cold air path by evaporimeter 15 cooled cold air by air blast blowing fan 16.Particularly; Cold air by blower fan 16 is carried is carried its part through single or a plurality of 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.

, the cold air that refrigerating chamber 2, refrigerating

chamber

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

In addition, in refrigerating chamber 2, removably be provided with the step shelf 17～20 that constitutes 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 in the orlop space 21 of side space down as it.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 state behind the closing cold room door 6 outstanding in refrigerating chamber 2.Be provided with backplate 30 at the back side of refrigerating chamber 2, this backplate 30 is formed with and makes the path that passes through from the cold air of blower fan 16 supplies.

As shown in Figure 2, in orlop space 21, be respectively arranged with the ice making water receptacle 22 that is used for to the ice making tray the supply system frozen water of refrigerating chamber 3 successively, be used to take in the receiver 23 of food such as dessert and be used for the freshness that food is carried out in indoor decompression is kept and the low-pressure chamber 24 of long preservation from a left side.Low-pressure chamber 24 has the transverse width littler than the transverse width of refrigerating chamber 2, disposes in abutting connection with ground with the side of refrigerating chamber 2.Have, can be clear and definite from figure: this low-pressure chamber 24 be to surround it by wall and door to form airtight structure on every side, therefore, can make its inner air pressure than outside low again.

Be configured in the rear of refrigerating-chamber door 6 (Fig. 1) in ice making water receptacle 22 and the left side of receiver 23 in Fig. 2.Like this, only, just can pull out ice making water receptacle 22 and receiver 23 through opening the refrigerating-chamber door 6 in left side.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 the refrigerating-chamber door 6 through closing the right side just can make the food service tray 60 of low-pressure chamber 24 turn back to the precalculated position from the state of pulling out injury-freely.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 also is positioned at the rear of the undermost door pocket 27 of refrigerating-chamber door 6.

Secondly, use Fig. 3 that the details of backplate shown in Figure 1 30 is described.On this backplate 30, be provided with: the cold gas exhausting outlet 31 (first cold gas exhausting outlet) that cools off usefulness to the refrigerating chamber of refrigerating chamber 2 cool-air feeds; Cool off the cold gas exhausting outlet 32 (second cold gas exhausting outlet) of usefulness to the low-pressure chamber of the orlop space of refrigerating chamber 2 21 cool-air feeds; With 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 is provided with towards the gap of the lower surface of the upper surface of low-pressure chamber 24 and shelf 20.The cold air that ejects from cold gas exhausting outlet 32 flows the gap of the lower surface of the upper surface of low-pressure chamber 24 and shelf 20, from top cooling low-pressure chamber 24.Therefore, to cooling off indirectly in the low-pressure chamber 24.

In addition, be used to control the damper device 41 that cold air flows being provided with by upstream side in low-pressure chamber 24 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 that flows to low-pressure chamber 24.

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

Also have; Here; Low-pressure chamber 24 is eliminated the gap on low-pressure chamber 24 right sides near the right flank ground configuration of refrigerating chamber 2; And in the left part of the upper surface of low-pressure chamber 24 gap that not shown shelf (next door) is eliminated low-pressure chamber 24 left sides is set, the cold air that therefore ejects from cold gas exhausting outlet 32 can be to the shunting of the left and right side of low-pressure chamber 24 and flow at the upper surface of low-pressure chamber 24.Like this, the air conditioning quantity of cooling off through the upper surface that increases low-pressure chamber 24, thus can cool off fast in the low-pressure chamber 24.The cooled cold air of the upper surface of this low-pressure chamber 24 is passed through the left surface of low-pressure chamber 24 and is inhaled into cold air return port 33 from the place ahead of low-pressure chamber 24, turn back to the cooler chamber through the supercooling return path.Be positioned at the rear, the back side of low-pressure chamber 24 near side one side of refrigerating chamber 2 cold air return port 33 is set, so cold air contacts with left surface with the back side of low-pressure chamber 24 and cools off.

Like this, quilt cools off low-pressure chamber 24 indirectly through it is outside owing to cold air.Therefore; Suppress the convection current of cold air through decompression; Thereby and open/close the influence that is produced for compressor through in closed container, cooling off indirectly; Situation with the temperature of switching and the defrosting etc. of the door of refrigerator rises also can suppress its harmful effect to internal temperature, can keep the state of high humidity with constant temperature.Have, refrigerated compartment 2 whole cold air also are inhaled into cold air return port 33 once more 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 side of the rear of receiver 23 and low-pressure chamber 24, dispose the negative pressure pump 29 that is used for low-pressure chamber 24 decompressions as an instance of decompressor.This negative pressure pump 29 is connected with the pump connecting portion that is provided with in the side of low-pressure chamber 24 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 case shape of the peristome (peristome is used in the food access) 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 food to be accommodated in it inner and come in low-pressure chamber, to deposit in or from the food service tray 60 of its taking-up through low-pressure chamber door 50.That is, in low-pressure chamber main body 40, use peristome, thereby form the low-voltage space that the space that surrounded by low-pressure chamber main body 40 and low-pressure chamber door 50 is depressurized through the food access of closing this low-pressure chamber door 50.Have, food service tray 60 is installed in 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 through loading of pieces on its food service tray 60 and close low-pressure chamber door 50, makes its inside become air-tight state, has again, door switch is connected driven negative pressure pump 29, with the state of low-pressure chamber 24 decompressions for forcing down than atmosphere.Like this, the oxygen concentration decline in the storeroom 13 can prevent the nutritional labeling deterioration in the food.

And, if with in front of low-pressure chamber door 50 moves to, then at 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 low-pressure chamber door 50 simply and carry out the access of food.

Secondly, use Fig. 4 to come the details of the detection means of food is described to Fig. 7.Fig. 4 be to use carbon dioxide sensor measure gas concentration lwevel in the low-pressure chamber shown in Figure 2 24 through the time figure that changes.

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

Under each condition, up to through one minute the time, measure empty state from beginning to measure, after through one minute, preserve food, measure the variation of carbon dioxide sensor.

Can know that from Fig. 4 if spinach is saved in the low-pressure chamber 24, then 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, do not have photosynthesis, can be to the container external diffusion yet, so 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 therefore the effluxion carbon dioxide can not rise yet.Therefore, if utilize this point, then can distinguish vegetables and meat fish.

The position that is provided with of secondly, using Fig. 5 that carbon dioxide sensor is described.Fig. 5 is the cutaway view of negative pressure pump 29 shown in Figure 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.

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

So, in the present embodiment, make the air and carbon dioxide sensor 64 contacting structure that make in the low-pressure chamber of discharging from negative pressure pump 29.Carbon dioxide sensor 64 shown in Figure 5 is cylindrical shapes; Therefore adopt following structure: process the exhaust outlet of negative pressure pump 29, the part of the carbon dioxide sensor 64 of in the exhaust outlet of negative pressure pump 29, packing into the mode of the internal diameter bigger slightly than the periphery of carbon dioxide sensor 64.Having, be not limited thereto, if air exhaust air contacts the test section of carbon dioxide sensor 64 effectively, then also can be exhaust outlet and sensor separated structures.

Have again, in the present embodiment, be kept at the detection means that suppresses gas kind of the food in the housing unit of external moving, use carbon dioxide sensor 64, but be not limited to this in inside as detection.For example, also can be detection perhaps detects the proportion of the gas componant in the housing unit from the gas componant detection means of all gases composition (ethene etc.) of food generation proportion detection means.

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

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

In Fig. 6, Fig. 7,68 the variations of carbon dioxide sensor value when being illustrated in negative pressure pump 29 from the pressure that begins to move and turn round in a continuous manner up to appointment.69 expression negative pressure pumps 29 from begin to move before the pressure that arrives appointment, once stopping and waiting for certain hour after make negative pressure pump 29 move pressure and the situation about stopping of arrival appointment once more.

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

But, shown in mark among Fig. 6 68, make negative pressure pump after 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 it is difficult that vegetables and meat fish are measured little situation etc. vegetables.

On the other hand; Under the situation of mark 69 (negative pressure pump 29 was once stopping before the pressure that arrives appointment and after waiting for certain hour, makes negative pressure pump 29 move pressure and the situation about stopping of arrival appointment once more from beginning to move); Begin to the output of the sensor that stops consistently with mark 68 from input, but the sensor output value when negative pressure pump is turned round once more becomes than begins from input to the much higher value of the sensor output value that stops.This is because owing to vegetables during negative pressure pump is stopped also to be proceeded to breathe, so the rising of the gas concentration lwevel in the low-pressure chamber, when beginning the driving of negative pressure pump once more, can detect the carbon dioxide after concentration rises efficiently.Therefore, turn round intermittently promptly, wait for that through making negative pressure pump the rising of the gas concentration lwevel in the low-pressure chamber makes negative pressure pump move once more again, thereby be easy to carry out the difference of vegetables and meat fish.

Secondly, use Fig. 8 that the control member of temperature transition is described.Have, Fig. 8 is the control block diagram of summary structure of control member of the refrigerator of expression present embodiment again.

In Fig. 8; With regard to the temperature control equipment 45 that for example constitutes by microcomputer etc.; The kind of the food that input is detected by the carbon dioxide sensor 42 of the gas concentration lwevel of the inside of detecting low-pressure chamber 24 and by temperature that can the temperature regulation section 44 of its temperature of conversion is set between ice Wen Wendu band and refrigerator temperature band is come to damper device 41 and heater 43 output control signals according to these temperature.

More specifically, under the high situation of the detected value of carbon dioxide sensor 42, the aperture through reducing damper device 41 or it is closed is fully controlled (inhibition) air conditioning quantity.In addition, under the low excessively situation of temperature, make heater 43 energisings that temperature is risen.Under or the situation about not having low at the detected value of carbon dioxide sensor 42, 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 the low-pressure chamber 24.

Further, the food will be described with reference to FIG 9 icing (freezing) the relationship between temperature and nutrients.Also have,, put into the food materials of freezing temperature band here because washiness thereby be easy to freeze for example, can be enumerated vegetables and dairy products and processed food etc.Usually, the moisture amount of vegetables is about 90%, and its apparent freezing point is 0 ℃～-1 ℃.In addition, the temperature in the preservation as far as possible near freezing temperature more effective aspect the quality maintenance.

Fig. 9 representes storage temperature and the ascorbic relation of vegetables.As the instance of vegetables, it is more that use contains 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 ℃.Condition during as preservation, ground at a distance from the air themperature of 1 ℃ of setting storeroom, under reduced pressure with under the atmospheric pressure preserving during four days, carries out the comparison of the ascorbic residual rate % of vegetables subsequently whenever from-2 ℃ to 1 ℃.Residual rate with the initial stage is 100% calculating respectively.

In the strip curve map in the drawings; Respectively; Mark 51 is illustrated in the ascorbic residual rate under the situation that the decompression of temperature-2 ℃ preserves down; Mark 52 is illustrated in the ascorbic residual rate under the situation that the decompression of temperature-1 ℃ preserves down, and mark 53 is illustrated in the ascorbic residual rate under the situation that the decompression of 0 ℃ of temperature preserves down, and mark 54 is illustrated in the ascorbic residual rate under the situation that the decompression of 1 ℃ of temperature preserves down; Mark 55 is illustrated in the ascorbic residual rate under the situation that the atmospheric pressure of temperature-2 ℃ preserves down; Mark 56 is illustrated in the ascorbic residual rate under the situation that the atmospheric pressure of temperature-1 ℃ preserves down, and mark 57 is illustrated in the ascorbic residual rate under the situation that the atmospheric pressure of 0 ℃ of temperature preserves down, and mark 58 is illustrated in the ascorbic residual rate under the situation that the atmospheric pressure of 1 ℃ of temperature preserves down.

Have again, after preservation, confirm to freeze influence the time, under the condition below the temperature-1 ℃, observe icing in a part.In addition, can confirm according to Fig. 9: the vitamin C of vegetables under reduced pressure, all maximum under the atmospheric pressure 0 ℃ of residual quantity, therefore short of freezing preserved the effect that the vitamin C that then can be inhibited reduces with low temperature.This can think, through preservation at low temperatures, and the respiration of vegetables is descended, and the consumption of the composition in the vegetables reduces, and therefore can suppress ascorbic deterioration.In addition, we can say,, compare effect with preservation under atmospheric pressure with inhibition vitamin C deterioration according to the storage under the decompression.

Also have, the tendency that has vitamin C to reduce is confirmed from the damage of pair cell in the back that freezes, and its result becomes ascorbic value because the icing result who produces inhomogeneous (fluctuation) that has or not.According to above content, vegetables might be frozen in 0 ℃～-1 ℃ temperature range, therefore preferably preserve more than the ice-cold temperature at this.

Secondly, the influence because of the pair cell of cooling generation describes to beef as an instance.As stated, at ice Wen Wendu band, storage is important in very narrow temperature province, if variations in temperature is big, then carry out repeatedly food freezing, thaw, produce quality on the contrary and descend.So the keeping quality for the meat of icing warm temperature province carries out the affirmation of cell grade.Have again,,, carry out because the comparison of the meat deterioration due to the generation of ice crystal with the inside that SEM (low vacuum electron microscope) observes beef as its method.

SEM observes under (still, temperature=-1 ℃, variations in temperature ± 0.5 ℃), (3) atmospheric pressure under three situation (1) initial stages, (2) decompression (still, temperature=-1 ℃, variations in temperature ± 2.0 ℃) and compares.Have again,, SEM is observed image carry out the image processing, obtain the voidage of muscle cell as observational technique.The result of calculation of the image process result and the voidage of the cell that obtains is carried out in expression according to the SEM image that so obtains in Figure 10.

According to Figure 10, 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 is rotten underway.But, after relatively preserving two as a result the time, confirm under vacuum, to preserve and obviously have the effect of the generation (gap between the quantity in hole and size, the cell etc.) that reduces the space.

Temperature under reduced pressure (1 ℃), variations in temperature is ± 0.5 ℃ a scope, the influence of pair cell tissue reduces.But temperature under atmospheric pressure (1 ℃), variations in temperature are ± 2.0 ℃ bigger, so moisture repeats to freeze and thaw, its result, and ice crystal becomes to look bigger, therefore can think that tissue damage is bigger.Have, the size in the hole from the image of figure can think that under the atmospheric pressure, intracellular hole is bigger again, therefore causes significantly in the cell and freezes.

In addition, the quantity in hole that becomes the reason of wizened mouthfeel and delicious variation when eating beef is suppressed through under reduced pressure preserving further with big I.Can think that thus the preservation under especially reducing pressure through indirect cooling structure to be suppressing the harmful effect due to the temperature, and if carry out high humidity and preserve, the preservation of the cytoclasis that the growth that then can carry out suppressing ice crystal is carried out food cell.In addition, through the inhibition cytoclasis, the leakage of the delicious composition that flows out in the time of can suppressing to thaw, and can thaw palatably.

According to above content; Even temperature band in the such temperature control difficulty of ice Wen Wendu band; Therefore above-mentioned low-pressure chamber also can make its inside become air-tight state through closing its low-pressure chamber door, can its internal temperature easily changed because of the switching of the door of refrigerator, and with its inner pressure relief; Thereby the also repressed what is called of the convection current that can carry out its inner cold air is cooled off indirectly; Thereby can suppress variations in temperature, and the growth that can suppress ice crystal is to the impact cell due to the food, and can keeps its freshness and quality well.

In addition, under the freezing situation of the so-called part that the temperature after making conversion from ice Wen Wendu band is lower, the portion of water in the food is freezed, and therefore the concentrating of the inside and outside generation composition of cell, microorganism is difficult to breeding.That is, though storage time is elongated, in preservation, repeat the generation and the growth of ice crystal, therefore along with producing through pair cell of time damaged, the mouthfeel when edible is poor slightly.So; Preferably as follows it is suitably used respectively, promptly, under the situation about in two days or three days, nursing one's health, preserve at above-mentioned ice Wen Wendu band; Edible at once but carry out under the situation of the preservation about a week, preserve at the temperature band that above-mentioned part is freezing.

In addition, in vegetables and fruit, when several ℃～10 ℃ storages, the state of organism film produces unusual, and the function of cell is destroyed, and produces low temperature infringements such as so-called variable color, organization softening, indenture.So, for example,,, then can not produce above-mentioned low temperature infringement if the temperature of freezing conversion is set De Genggao for summer vegetables such as cucumber, eggplants, can keep its freshness.

In addition, preserve at the same time under the situation of meat and vegetables, the influence that consideration is freezed preferably is transformed into ice-cold (チ Le De) temperature and brings and preserve.And, when the food of the inside that will be accommodated in airtight bag etc. and this bag expansion is under reduced pressure preserved in low-pressure chamber,, thereby vavuum pump action ground is preserved for example through removing pressure reducing mode.Like this, can suppress the expansion of collecting bag and break and consequent harmful effect, and can preserve safely and efficiently other food.

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

So in the present embodiment, the food that adopts the automatic judgement of refrigerator to preserve is controlled to be the structure of the temperature band of the food that is suitable for having preserved automatically, thereby the best that can comprise the food of meat and fish is preserved.

In addition, adopt the food of housing unit is controlled the structure of the air conditioning quantity of housing unit cold air path on every side in the mode of preserving under the supercooling state or under the supercooling state, freeze.Like this, in use or when preserving, under the situation of food freezing, make the whole moisture of food freeze to be the fine particle shape equably, the destruction that therefore can suppress the cell tissue of food.In addition, food integral body is freezed equably, can keep the mouthfeel of food.In addition, under the situation of meat, suppress the leakage when thawing, can keep the delicious composition of food.

(embodiment 2)

In embodiment 2, under atmospheric pressure use the low-pressure chamber 24 of embodiment 1 record.Owing to the aluminium lid of the cake that be out of shape of decompression and damaged pudding and sour milk, plastic containers etc. can under reduced pressure be stored,, also can prevent drying and nextly can suppress the freshness deterioration through indirect cooling through preserving than refrigerating chamber low temperature even do not reduce pressure.

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

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

(embodiment 3)

In embodiment 3, the carbon dioxide detection means is set in the direct position contacting of the air of compartment interior.For example, through this storeroom being configured in the good refrigerator of serviceability central authorities, much less be that the storage of meat fish is very convenient, and the storage of 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 stated, have the storage temperature that is suitable for food.That is, vegetables are more than 0 ℃, the meat fish be-3～-1 ℃ for well.In above-mentioned food, what discharge carbon dioxide is vegetables.So, under the situation of the increase that detects carbon dioxide in the elapsed time of utilizing the carbon dioxide detection means behind storage, be controlled to be the storage temperature more than 0 ℃, under the situation that does not detect increase, be controlled to be-3～-1 ℃ storage temperature.

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

(embodiment 4)

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

The optimum temperature of leafy vegetable is that uncongealable minimum temperature is promptly from 1 ℃ to 0 ℃ best storage temperature.In addition, fruit vegetable is easy to receive the low temperature infringement, and 5 ℃ is optimum temperature.

In addition, though vegetables are discharged carbon dioxide because of breathing, respiratory capacity is different because of vegetables, and the respiratory capacity of leafy vegetable is bigger than the respiratory capacity of fruit vegetable and fruit, roots vegetable.So through for example inner cap is set in vegetable compartment, the structure internal respiration by the seal member of seal etc. improves seal when taking in then becomes the structure that is full of carbon dioxide like fruit vegetable.Detect the detection means of carbon dioxide in the set inside of this vegetable compartment.Under the situation that the discharge rate of carbon dioxide increases in preservation, it is more to be judged as leafy vegetable, and the temperature in the vegetable compartment is controlled to be 0 ℃～3 ℃.Under the few situation of the discharge rate of carbon dioxide, roots vegetable and bottled drink etc. are more, therefore storage temperature are controlled to be 5 ℃.

With regard to leafy vegetable, thereby can suppress the minimizing of nutritional labeling and prevent variable color through reducing storage temperature.In addition,, the saturation water component is descended, can suppress moisture and evaporate from vegetables through the low temperature of preserving that descends at air-tight state.And, can carry out the withered inhibition of vegetables, when being used to cook, can reduce the unhelpful amount of abandoning.

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

Can know from above content; According to each embodiment; Storeroom in refrigerator main body possess suppress gas in inside to the housing unit of external moving, and possess the food that detection preserves at this housing unit kind detection means and according to the control member that this housing unit is controlled to be two above different temperatures bands by the kind of the detected food of detection means.Like this, can provide ice Wen Wendu difficult in the structure that can be employed in the past to be with and to possess the refrigerator of the best cryopreserved structure that has improved of the food that can comprise meat and fish.

In addition, connect the exhaust component that the part of the gas in this housing unit is discharged at above-mentioned housing unit, 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.

The food of the housing unit at position that like this, can the be good ground A.T.C that conforms to being contained in the serviceability of being located at refrigerating chamber.In addition, improve and preserve the different food of solidification point for example under situation and the situation of preserving meat and fish of vegetables at housing unit in user's serviceability, because conversion storage temperature automatically, so can suppress vegetables and freeze and deterioration.Have again, take place to leak thereby the storage temperature that can suppress meat uprises delicious composition is reduced.

In addition, above-mentioned housing unit is to make the low low-pressure chamber of built-in pressure ratio external pressure through above-mentioned exhaust component.In addition, above-mentioned exhaust component carries out intermittent working and becomes predetermined pressure up to above-mentioned low-pressure chamber.Like this, the variations in temperature that when the food preservation of ice Wen Wendu band, becomes problem suppresses the convection current of cold air through making to reduce pressure in the low-pressure chamber, thereby can suppress variations in temperature through low-pressure chamber is cooled off indirectly.

In addition, above-mentioned different temperature band is the arbitrary temperature band between-3 ℃ to+3 ℃.Like this, can suppress vegetables freezes and goes bad.Have again, take place to leak thereby the storage temperature that can suppress meat uprises delicious composition is reduced.Also have, can suppress the influence that growth caused of ice crystal food cell.

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

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

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

Claims

1. refrigerator is characterized in that:

Possess in the storeroom in refrigerator main body suppress gas in inside to the housing unit of external moving,

This refrigerator possesses: the detection means that detects the kind of the food of in above-mentioned housing unit, preserving; Above-mentioned housing unit is controlled to be the control member of plural different temperatures band with kind according to the food that detects with above-mentioned detection means.

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

Above-mentioned detection means is detection perhaps detects the proportion of the gas componant in the above-mentioned housing unit from the gas componant detection means of the gas componant of food generation a proportion detection means.

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

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

4. according to each described refrigerator in the claim 1 to 3, it is characterized in that:

Connect the exhaust component that the part of the gas in this housing unit is discharged at above-mentioned housing unit, 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.

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

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

6. refrigerator according to claim 4 is characterized in that:

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

7. according to each described refrigerator in the claim 1 to 6, it is characterized in that:

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

8. according to each described refrigerator in the claim 1 to 6, it is characterized in that:

The air conditioning quantity of the cold air path that the control of above-mentioned control member is disposed with the mode of the above-mentioned housing unit of indirect cooling.

9. refrigerator according to claim 8 is characterized in that:

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

10. it is characterized in that according to Claim 8 or 9 described refrigerators:

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