KR850000498B1 - Refrigerating apparatus - Google Patents

Abstract

A refrigeration apparatus comprises a cooling chamber, a means for cooling the cooling chamber, at least one cooler box arranged in the cooling chamber to store food in the cooler box, at least one heat- medium passage provided on the outer periphery of the cooler box and having an inlet and an outlet, a means to circularly feed a cooled heat medium into the heat medium passage from the inlet to the outlet, at least one humidified air supply pipe having a port that opens into the cooler box, and a humidifier connected to the humidified air supply pipe to supply humidified air to the humidified air-supply port.

Description

Refrigeration unit

1 is a cross-sectional view showing an embodiment of a refrigerator according to the present invention.

2 is a cross-sectional view taken along the line II-II of FIG.

Fig. 3 (a) and Fig. 3 (b) are cross-sectional views of the cooler box mounted and removed.

4 is a cross-sectional perspective view showing a part of an embodiment of a dew receiver mounted on a cooler box ceiling.

5 is a perspective view showing an embodiment of a quality stabilizer supply device.

6 is a side view showing a part of the feeding device of FIG.

7 is a cross-sectional view taken along the line VII-VII of FIG.

8 is a cross-sectional view of FIG. 7 showing another embodiment of the quality stabilizer supply device.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration apparatus for preserving foods, especially foods such as fish, meat, vegetables, fruits, etc. without freezing. It relates to a refrigeration unit that can create a preservation environment and allow fish and food to be preserved for a long time.

For example, fish and foods such as fish and meat products such as fish meat, freshness, that is, freshness of the food is generally post-stiffness, digestion of proteins due to autodigestion enzymes, It decreases in the order of decay by the propagation of microorganisms. Among them, the self-extinguishing of the meat is called aging. This self-extinguishing softens the tissues and improves the taste, but since fish and fish are softer than anything else, the taste decreases with self-extinguishing. . Moreover, when fish and fish are injured, the deterioration of taste is fatal. For this reason, the problem of deterioration of freshness is especially important for fish and shellfish.

However, it is known that self-extinguishing and decay are suppressed by preserving food at low temperature and weakening the activity of enzymes and microorganisms. Cryopreservation is a remarkable effect. Refrigeration treatment by the cryopreservation method causes freezing degeneration such as tissue destruction, discoloration and loss of flavor due to freezing.

Therefore, the refrigeration preservation method that does not freeze food is the best in that there is little degeneration in the composition of the food.

By the way, the cryopreservation method has been a big problem because of the performance problem of the refrigerating device and the short shelf life.

In the present invention, a deep study of the effects of the refrigerated preservation environment on fish and food products shows that not only the refrigeration temperature but also a significant factor, but the fluctuation of the refrigeration temperature is also a major cause of the deterioration of freshness. I realized that In particular, when the temperature fluctuation exceeds 3 ° C, the shelf life is significantly shortened. Humidity has also been found to be an important factor in maintaining freshness. The long-term experiments found that the preservation environment with temperature 0 ± 1 ℃, humidity 60-100%, especially humidity 80-95%, is the best condition for preserving fish and food.

In conventional refrigerators (refrigerators), temperature fluctuations occur in a width of 5-10 ° C due to changes in outside temperature, opening and closing of doors, and furthermore, even humidity is not adjusted, and it is converted into a dry state. Conventional refrigerators have not been able to realize optimal cooling conditions until now.

Therefore, the present invention minimizes temperature fluctuations in the first lane and adjusts humidity, and manufactures and supplies refrigerating devices in a second environment with an optimal refrigeration storage temperature of 0 ± 1 ° C and a humidity of 60-100%. The purpose was to.

In addition, another object of the present invention is to inhibit the activity of enzymes, the growth of microorganisms, or the oxidative action without freezing the food, and to preserve fish and food products for a long time, and also to contain the food in the food without drying In order to keep the moisture as it is, to prevent deterioration of freshness, and to suppress the temperature fluctuation range of about ± 1 ℃, it is necessary to limit the dimensions of the cooler box required for storing food and the circulation system of the cooling heating medium. It provides clear instructions and manufactures and supplies a refrigeration apparatus that treats and drips the condensation water on the wall by humidifying the cooler box so that the condensation water does not adversely affect the refrigerated food. For that purpose. In addition, if the preservation of the refrigerated food is further enhanced by the quality stabilizer, the drug can be effectively supplied into the cooler box.

Thus, the refrigerating device of the present invention for achieving the above-mentioned object basically flows heat medium directly to the outer periphery of the cooler box, that is, the outer circumference of the cooler box, and supplies humidifying air into the box. And the cooler box is disposed in a separate cooling chamber.

On the other hand, the condensation water treatment device is installed at the ceiling of the cooler box so as not to prevent the circulation of cold air and cause the occurrence of harmful temperature gradient, and the supply device of the quality stabilizer humidifies the quality stabilizer of the gas phase. At the same time as the air, it should be installed at the supply port of humidifying air to be delivered to the cooler box.

The improved feature compared to the conventional one in the technical configuration of the present application is that 1) a separate cooler box is disposed in the refrigerating chamber, 2) a continuous heat medium flow path is formed on the outer circumference of the cooler box, 3) There exists a heating medium cooling circulation device which flows the cooled heating medium to this heat medium flow path, and 4) the apparatus which supplies humidification air in a cooler box exists. Due to these features, the present refrigeration apparatus has an excellent working effect compared to the conventional one.

That is, the refrigerating device of the present invention has a storage temperature of 0 ± 1 ° C., which is higher than the conventional one, and in particular, the fluctuation range of temperature can be suppressed to about ± 1 ° C., which is much lower than the conventional 5-10 ° C. Since it can be maintained at -100%, freezing denaturation or drying of foods caused by freezing, which is found in conventional refrigerators, is not seen. Therefore, the refrigerator of the present invention can preserve the freshness of foods for a long time.

The refrigerating device which concerns on this invention contains the cooling chamber 1 and the cooler box 2 arrange | positioned at this cooling chamber 1.

The cooling chamber 1 is surrounded by an outer box 3 made of, for example, a heat insulator such as urethane, and the cooler box 2 is a metal plate having good thermal conductivity ( 4) It is made of square tube made of the bottom part.

One end of the cooler box (2) is open for food access, and is provided with an inner cover (5) and an outer cover (6) made of a heat insulating material, which can be opened and closed at the opening. It is.

On the outer circumference of the metal plate 4 constituting the cooler box 2 of the upper and lower stages, a separating plate 7 wound in a series of spirals, respectively, is integrally provided at a predetermined interval by welding or other means. The plate 7 and the cooler box sheath 8 covering the outside of the separating plate form a spiral continuous heat flow path 9 surrounding the outer circumference of the cooler box 2. Doing.

The inlet portion 9a of the heat medium passage 9 provided below the cooler box 2 is connected to the discharge side of the pump 12 through the flow control valve or the solenoid valve 10 and the supply pipe 11. The outlet portion 9b communicating with and positioned above the cooler box 2 is the suction side of the pump 12 through a recovery pipe 13 and a chiller tank 14. There is communication with.

In the chiller tank 14, the evaporator 16 of the refrigerator 15 is inserted, and the heat medium in this tank 14 is cooled by this evaporator 16. As shown in FIG. The cooled heat medium flows out the outer circumference of the cool gas 2 by the circulation path having the pump 12 and then returns to the chiller tank 14 again.

When controlling the temperature in the cooler box 2 to 0 +/- 1 degreeC, it is good to cool the heat medium to 0-minus 3 degreeC, especially minus 2 degreeC in the chiller tank 14.

Of course, when the temperature in the cooler box detected by the temperature detector 17 becomes higher than 0 ° C., the heat refrigerant is controlled by the flow control valve or the solenoid valve 10. To increase the flow rate of the control, if it is lower than the control to reduce.

On the other hand, in order to maintain the temperature at 0 ± 1 ° C. without causing a harmful temperature gradient in the cooler box 2, the vertical dimension l of the box 2 in the up and down direction may be constant. There is a need.

Experiments have shown that good results are obtained when the dimension l is in the range of 200-230 mm.

As the heat medium, a liquid which does not freeze even below minus 3 ° C is used.

For example, glycerin, propylene glycol, or a mixture of ethyl alcohol and water may be used.

The refrigerator 15 is equipped with a stop valve on the discharge side of the condenser in the refrigeration cycle to minimize the cooling temperature difference, thereby controlling the overcooling of the heat medium to control the refrigeration temperature difference Minimizing. In addition, the evaporator 16 of the refrigerator 15 is guided to the inside of the cooling chamber 1 after exiting the chiller tank 14, and as a screw cooler 18 inside the outer box 3. Excreted.

In this way, the downstream side of the evaporator 16 that cools the heat medium in the chiller tank 14 around -2 ° C is led into the cooling chamber 1, and the temperature in the cooling chamber 1 is -2 ° C-0 ° C. Can be maintained.

On the other hand, in order to maintain the heat medium temperature at a predetermined value even when the outside air temperature is lower than the temperature in the cooler box 2 or the heat medium, a heater and other heating means are provided to the chiller tank 14 as is well known. It is of course possible to install switching means so as to install and / or operate the heat pump in the refrigerator 15.

On the other hand, the ultrasonic humidifier 20 is disposed in the cooling chamber 1, and the clean seaweed (size of 1-5 meat tons) produced therefrom is a multiple blade line 21 and a main duct. It enters into this box 2 through the mainduct 22 and the humidifying air supply port 23 of the cooler box 2.

24 is a humidifying air outlet for discharging the humidified air circulated in the cooler box 2 into the cooling chamber 1, and the humidification regulator 25 is provided in this outlet 24. As shown in FIG.

The humidifier 25 detects the relative humidity at the outlet of the cooler box 2 of humid air and turns the ultrasonic humidifier 20 on-off such that it reaches a predetermined value, for example 60-100%. Alternatively, the operation time of the ultrasonic humidifier 20 is controlled by a timer.

The ultrasonic humidifier 20 emits ultrasonic waves from the bottom of the tank 20a of sprayed water and, as a result, water column and fine mist caused by cavitation pushed to the surface of the water. Mist is used as a humidifying laver to obtain clean laver of 1-5 microns.

On the other hand, the ultrasonic humidifier 20 is preferably installed in the cooling chamber 1 to maintain the sprayed water at the same temperature as the cooler box.

In this case, in order to prevent the sprayed water from freezing when the temperature in the cooling chamber 1 becomes 0 ° C. or lower, a heater or other heating means is installed in the humidifier and the temperature in the cooling chamber 1 is set to a predetermined temperature. The heating means is operated when the temperature is lowered.

By the way, in the box 2, the plate 30 which receives dew from the ceiling is installed.

The dew receiving plate 30 is formed much smaller than the planar shape of the cooler box 2, and is located next to the inner cover 5 on a plurality of pieces 31 protruding from the peripheral wall of the cooler box 2. At the time of the insertion support, the peripheral wall of the box 2 and a predetermined interval are formed.

In addition, the dew receiving plate 30 is formed in a dish shape having the periphery of the bend edge 32 upward, and a plurality of cold air passage holes are formed in the flat portion surrounded by the bend edge 32. 33 has been established. The circumferential circumference of the cold air passing hole 33 forms a drop prevention wall 34 on a cross section wrapper that is bent upwardly in the same manner as the curved lead 32. 35 denotes a water pipe leading to the humidifying air outlet 24 at the bottom of the dew condensation water cooler box 2 when dropped onto the dew receiving plate 30.

Meanwhile, the dew receiving plate 30 may be inclined by slightly lowering the side of the water pipe 35.

Moreover, the suitable water receiving means is attached to the lower part of the cooling chamber 1.

In addition, it cools drugs that have at least one action of quality stabilization such as microbial sterilization, bacteriostatic action, food antioxidant, protein degeneration inhibition, etc. It is supplied in the box (2). The quality stabilizer supply device 40 is detachably attached to the humidification air supply port 23.

This quality stabilizer supply device 40 is composed of a mixing tube 41 and a quality stabilizer retainer 42, as in FIGS. 5 to 7, and the mixing tube 41 has an end thereof. The partition plate 44 which has the flange 43 which regulates the insertion length in the said supply port 23 in the part, and divides this pipe up and down in the diameter part 1 is provided.

The quality stabilizer retainer 42 is installed in correspondence with the upper part of the partition plate 44, and the flat box 45 is bonded to the mixing pipe 41, while the mixing plate located in the box 45 ( A communication hole is installed in 4) to communicate the inside of the box 45 and the mixing pipe 41.

In the box 45, the tip thereof is located in the mixing pipe 41. The absorbent material 43 which consists of cotton wool, various filter media, etc. is accommodated.

48 is a cover for allowing the absorbent material 47 to enter and exit the box 45, and 49 is a mesh member provided in the upper half of the mixing tube 41 in correspondence with the front and rear ends of the box 45. As shown in FIG.

On the other hand, the quality stabilizer to be given to the absorbent material 47 is an evaporative drug having one or more of quality stabilizers such as microorganism sterilization, bacteriostatic action, anti-oxidation action of food, and inhibition of protein denaturation.藥劑) do not ask the kind.

For example, good results were obtained by using a mixture of 0.02-50 parts by weight of an antioxidant reducing agent and 5-30 parts by weight of a metal ion blocking protein denaturation agent with respect to 100 parts by weight of ethyl alcohol having bactericidal action.

Examples of antioxidant reducing agents include, for example, L-ascorbic acid, L-ascorbic stearic acid ester, L-ascorbate and erythorbic acid. (erysorbic acid), sodium erysorbate, L-fryptophane, tocopherol, vanillin, rutin, butylhydroxy anisole, di- One or more kinds of dibutylhydroxy tolune can be used, and examples of metal ion-blocking protein denaturants include sodium metaphosphate, sodium phrophosphate, sodium polyphosphate, One or more kinds of phytic acid can be used.

In addition, 1-10 parts by weight of burnt alum and 1-20 parts by weight of 5 ′ ribonucleotide sodium are mixed with the quality stabilizer of the composition in foods that are susceptible to enzymatic degradation such as fish and shaft meat. In this case, a better quality stability effect is obtained.

In the present refrigerator according to the above configuration, since the inside of the cooling chamber 1 is cooled to minus 2 ° C.-0 ° C. by the tubular cooler 18, the external heat penetrating through the outer box 3 cools the cooler box 2. It is hardly transmitted to the heat medium, and since the heat medium of 0 degreeC-minus 3 degreeC flows directly in the heat medium flow path 9 of the outer side of the cooler box 2 above, the temperature in the cooler box 2 is 0 +/- 1 degreeC. It can be maintained as.

In particular, since the heat medium inlet portion 9a of the heat medium flow path 9 is located under the cooler box 2, the chiller tank 14, the pump 12, the supply plate 11, and the opening / closing valve 10 are opened. The heat refrigerant to be supplied to the inlet portion 9a through the air flow passage 9 spirals through the air flowing through the spiral flow passage 9 to ensure the air present in the heat medium flow passage 9, and finally to the outlet of the upper portion of the cooler box 2. Approaching part 9b.

Furthermore, it returns to the chiller tank 14 through the return pipe 13. Therefore, the possibility of bubbles being generated in the heat medium passage 9 can be almost eliminated, and the heat resistance between the heat medium and the cooler box wall surface can be maintained to be good, and the constant temperature performance can be sufficiently exhibited.

26 shows the air exhaust cock installed in the outlet portion 9b of the heat medium passage 9.

As described above, the ultrasonic humidifier 20 maintains the humidity in the cooler box 2 whose temperature is controlled as described above to 60-100%, and by controlling both of this temperature and humidity, fish, Keep fresh food fresh for a long time.

Therefore, as a result of supplying humidifying air into the cooler box 2, condensation water adheres to the upper wall of the cooler box in the cooling state, and when this is dripped, the dripping water must be collected on the dew receiving plate 30. , Through the water pipe 35 is discharged to the outside of the cooler box (2) from the outlet (24).

Therefore, there is no fear that food in the cooler box 2, particularly soft foods such as sea urchins, may be damaged by the dripping condensation water. The cold air passage 33 allows the circulation of cold air in the cooler box and prevents harmful temperature gradients from occurring. For this purpose, the number and total opening area are determined within this purpose range. Since the peripheral edge of the cold air passage 33 is the dripping prevention wall 34 bent upward, dripping water does not fall from this cold air passage 33.

The dew receiving plate 30 may be formed of a metal plate such as stainless, but is preferably formed from a plate other than a metal plate such as a synthetic resin plate in order to reduce the possibility of condensation water adhering to the plate itself.

In addition, when the humidifying air supplied from the supply port 23 passes through the quality stabilizer supply device 40, the part is mixed with the quality stabilizer vaporized through the absorbent material 47 of the mixing tube 41, and the cooler box ( In order to supply in 2), the quality of food can be stabilized by the action of this chemical | medical agent, and food preservation can be improved more. The concentration of the quality stabilizer can be appropriately adjusted depending on factors such as the density of the absorbent material 47 and the length of passage of humidified air.

The diffusion and absorption of the quality stabilizer to the absorbent material 47 may be appropriately performed, and usually, it may be performed approximately every 7 to 10 days, depending on the frequency of entering and exiting the food.

In order to lengthen the diffusion | suction adsorption space | interval, for example, the storage liquid tank 50 may be provided in the lower part of the box 45 like FIG. 8, and the lower part of the absorbent material 47 may be immersed in this storage liquid tank. Next, the preservation effect of the refrigerator and the quality stabilizer according to the present invention will be explained according to the experimental results.

In this experiment, two refrigeration apparatuses of the present invention were kept at a temperature of 0 ± 1 ° C. and a humidity of 60-100%, and a quality stabilizer was supplied to only one side to prepare fish and food products that can be seen in the name column of the table. Color, touch, decay (brownish color, taste change) and mildew, swelling at the same time when the same food is stored in a refrigerator at 0-7 ° C and a refrigerator at 0 ° C-0 ° C for comparison. (Bacterial proliferation, slime) was investigated.

표는 양호, △표는 약간 변화, ×표는 갈색으로 변색, 맛이 변함, 부패 그리고 ◇표는 곰팡이김으로 한 것이다.Judgment drew 18 fish, food specialists such as fisherman, animal husbandry, fish, cook who is matchmaking of food and food expert and saw agreement of more than 15 among them ○ vote is very good,

The mark is good, the △ mark is slightly changed, the x mark is brownish, the taste is changed, decay, and the ◇ mark is moldy.

TABLE 1

Product Name: Tuna (Defrosted tuna)

TABLE 2

Product Name: Bonito

TABLE 3

Product name: Raw prawn

TABLE 4

Product Name: Saurel

TABLE 5

Product Name: Paste of sea ulchin eggs

TABLE 6

Product Name: Shellfish (Cocke)

TABLE 7

Product Name: Cuttlefish

TABLE 8

Product Name: Mackerel

TABLE 9

Product Name: Oyster

TABLE 10

Product Name: Beef

TABLE 11

Product Name: Chicken

TABLE 12

Product Name: Pork (Pork)

TABLE 13

Product Name: Hamburger

TABLE 14

Product Name: Mushroom

TABLE 15

Product Name: Strawberry

TABLE 16

Product Name: Peony (Broccoli)

According to the results of the experiment from Table 1 to Table 16 will be found the superiority of the leading maintenance of the refrigerator and the quality stabilizer of the present invention.

In the above experimental example, since the cooling of the heat medium flowing around the outer side of the cooler box and the cooling of the cooling chamber are all made of the same freezer, the freezing system is simplified for this purpose. It is not impossible to freeze with a separate frozen product and the cooler box can also dispose one or more suitable water in the cooling chamber (1), but due to the above-mentioned contract, it is common to actually have a 4 to 5 stage arrangement. . In this case, if the inner cover (5) and the outer cover (6) of each cooler box is provided separately from each other as in the embodiment, the advantage that the temperature fluctuations caused by the opening and closing of the cover does not extend to other cooler boxes is obtained.

Claims (1)

A refrigerating device having a cooling chamber and a cooling device for cooling the cooling chamber, comprising: a cooler box disposed in the cooling chamber, and a continuous portion having an inlet and an outlet formed at an outer circumferential portion of the cooler box; A heat medium flow path, a cooling circulation device for a heat medium supplying a heat medium cooled from the inlet to the outlet of the heat medium flow path, and a supply port of humidified air opened in the cooler box; And a humidifier for sending humidified air to this supply port.

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