JPH0620062Y2 - Fresh food storage device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a storage device for fresh food such as meat, seafood, vegetables, and buckwheat, which keeps the storage chamber at high humidity and the temperature inside the storage chamber. By minimizing the change, it has been improved to enable long-term storage.

In order to keep fresh foods refrigerated, it is necessary to maintain high humidity as well as low temperature.

Further, regarding the storage temperature, if the temperature during storage changes, the freshness decreases and the quality deteriorates. For example, in the case of beef, it is necessary to keep it at -1 ° C ± 0.5.

Regarding humidity, it is desirable that the relative humidity is 80 to 90% RH.

2. Description of the Related Art As a conventional fresh food storage device, as a means for storing vegetables or the like for a long time, as shown in FIG. An evaporator 11 of a refrigerating cycle which is arranged in the lower part of the chamber 2 to cool the inside of the storage chamber 2, and an evaporator which is arranged so as to face the evaporator 11.
A circulation blower 12 that blows air to 11 to forcibly circulate cool air in the storage chamber 2; and a temperature controller 13 that is provided in the vicinity of the evaporator 11 and that has a heat-sensitive section 13a that senses the temperature of the evaporator 11. The heat-sensing portion 13a of the temperature controller 13 and a baffle plate 14 that is provided with a narrow gap and shields against the wind from the circulation blower 12 so that the circulation blower 12 rotates. A refrigerated showcase (Japanese Patent Publication No. 61-48070) is known in which the humidity inside the storage chamber 2 is adjusted according to the speed setting. In the case of this showcase, cold air is blown out from the upper surface side of the opening 4 toward the suction port 9, and this cold air serves as an air curtain for the opening 4 to cool the stored object in the storage chamber 2. There is.

However, in the case of such a conventional showcase, when the evaporator of the refrigeration cycle is frosted and the humidity is lowered, low-humidity air is supplied to the storage chamber and the stored objects are stored. It was difficult to maintain the freshness of fresh food products because the water contained therein was condensed and dried.

Further, in the conventional case, hot air enters the storage chamber at the time of defrosting and heats the object to be stored, so that there is a possibility that the quality may deteriorate due to the temperature change.

Furthermore, when the brine system is adopted, the refrigerator must be completely sealed because the brine flows in the refrigerator, which complicates the structure and takes a long time to defrost. It was

In view of the drawbacks of the prior art, the present invention provides a perishable food storage device having a relatively simple structure, a small temperature difference and a high humidity, and being hard to heat a stored object during defrosting. To aim.

Means for Solving the Problems That is, the present invention relates to a storage chamber covered with a casing made of a heat insulating material and a door body made of a heat insulating material, and a door installed in the storage chamber with a predetermined space separated from the casing. A storage box composed of a heat transfer panel opened to the body, a vertical partition plate for partitioning the space between the casing and the storage box on the back or side of the storage box, and a space for the ceiling part of the storage box on the partition plate. It consists of a horizontal partition plate connected so as to partition, the opening side is provided on the door side of the horizontal partition plate and the bottom side of the partition plate, and the evaporator of the refrigeration cycle is arranged on the casing side of the air passage, and the storage box The fresh food storage device is equipped with a blower so that the air in the side air passage flows to the evaporator.

In the device according to the present invention, since the storage box is sealed by the door body, the inside of the storage box is cooled by heat conduction by the heat transfer panel forming the storage box. The air sucked by the blower is blown to the evaporator, where it is cooled to a predetermined temperature. The air discharged from the evaporator is too cold, and if it is directly brought into contact with the back surface or the side surface of the storage box, it will be locally cooled. However, since the air passes through the casing side of the air passage that is double-partitioned by the partition plate, it does not directly contact the back or side surface of the storage box,
It comes into contact with the partition plate and exchanges heat with the air in the air passage on the side of the storage box through the partition plate to warm it to an appropriate temperature. The warmed air is
Since the storage box and the casing are installed with a predetermined space therebetween, the storage box and the casing flow into the bottom part of the storage box from the opening part of the bottom part, pass through the side parts and the back part of the storage box, and reach the ceiling part. Flows. At that time, the air exchanges heat with the air in the storage box via the heat transfer panel to cool the air in the storage box. The air that has flowed into the ceiling is blown again toward the evaporator by the blower through the opening provided near the ceiling and is cooled. As a result, the storage box is cooled substantially uniformly throughout without being locally cooled.

Embodiment Hereinafter, the present invention will be described in detail with reference to an embodiment shown in FIGS.

In FIGS. 1 to 4, reference numeral 20 is a casing made of a heat insulating material, and has a front opening. Its casing 20
Doors 22a, 22b, which are made of a heat insulating material and are pivotally attached to each other by hinges or the like so as to be freely opened and closed, are independently installed and sealed in the opening.

In the storage chamber 24 covered with the casing 20 and the door bodies 22a, 22b, storage boxes 26, 27 made of heat transfer panels whose openings are brought into contact with the door bodies are vertically separated by a predetermined interval. Have been installed.

The ceiling portion, the side surface portion, the rear surface portion and the bottom surface portion of the storage boxes 26, 27, which are heat transfer panels, are separated from the casing 20 by a predetermined distance, and the space formed therein serves as an air passage 28. In addition, the ceiling and door body composed of the upper heat transfer panel 22
The contact portion with a is bent into an L shape and joined to the casing 20. The bottom part made up of the upper heat transfer panel and the ceiling part made up of the lower heat transfer panel are joined in a bent state near the door body, respectively, and are contact parts with the door bodies 22a and 22b. Further, the abutting portion of the bottom surface portion composed of the lower heat transfer panel with the door body 22b is bent and joined to the bottom portion of the casing 20. As a result, the air passage 28
Has a hermetically sealed structure with the storage boxes 26, 27 and the casing 20.

On the ceiling of the air passage 28, a horizontal partition plate 30 that divides the air passage 28 into two is installed, and on the back surface of the air passage 28,
A vertical partition plate 32 that partitions the air passage into two is installed continuously with the partition plate 30. These partition plates 30 and 32 are storage boxes 26 and 27.
And a certain distance away. In the space formed by the horizontal partition plate 30 and the casing 20, a compressor 34, a condenser 36, a pressure reducing means 38 such as a capillary tube, and an evaporator 40 of a refrigeration cycle circulated and connected to the evaporator 40 are installed in the casing 20. It is installed in abutment. A part of the horizontal partition plate 30 is bent and joined to the casing 20, and a blower 42 for air circulation is installed in an open part provided in the bent part.

A guide hole 44 is formed at a position slightly above the ceiling portion of the storage box 27 of the vertical partition plate 32, and a guide plate 46 is provided diagonally downward on the storage box side above the guide hole 44 to the passage plate 32. It is joined. Further, the end portion of the vertical partition plate 32 is bent along the bottom surface portion to form an open portion between the vertical partition plate 32 and the casing 20.

Reference numeral 48 is a solenoid valve that opens and closes a bypass pipe that connects the refrigerant outlet of the compressor 32 and the refrigerant inlet of the evaporator 40. This solenoid valve 48 is a control device 52 based on the detection result from a defrost sensor 50 which is placed close to the bottom surface of the storage box 26 of the blower 42.
The operation is controlled by.

Reference numeral 54 is a temperature sensor installed near the suction port of the blower 42, and a controller based on the detection result of the temperature sensor.
52 turns on and off the compressor 34. This control device 52 stops the compressor 34 when the temperature inside the storage box falls below a predetermined temperature t _1, and operates the compressor 34 when it rises above a predetermined temperature t ₂ (t ₂ ≧ t ₁ ). Control to do.

Further, the bottoms of the storage boxes 26, 27 are tapered and have a low central portion. Drain pipes 56, 57 are connected to the central portions, and the drain pipe 56 penetrates the ceiling portion of the storage box 27. The drain pipe 57 penetrates the casing 20. Reference numeral 58 is a sealing material provided at a contact portion between the door bodies 22a and 22b and the casing 20.

In the apparatus of the embodiment according to the present invention having the above-described configuration, when the refrigeration cycle is activated and cooling is started, the air passing through the evaporator 40 is cooled to -8 ° C to -3 ° C. The cooled air is blown by the blower 42 and flows along the partition plates 30 and 32 in the air passage between the partition plates 30 and 32 and the casing 20. A guide hole 44 is provided in the middle of the vertical partition plate 32.
Since part of the air is opened, a part of the air passes through the guide hole 44 and flows along the guide plate 46 while being in contact with the heat transfer panel between the storage box 26 and the storage box 27, and exchanges heat with the air in the storage box. To do. The air that does not pass through the guide holes 44 further flows along the partition plate 32, and flows from the opening of the partition plate 32 toward the bottom surface of the storage box 27. The air that has flowed around the storage boxes 26, 27 flows upward due to the suction action of the blower 42 for blowing, and comes into contact with the back surface portion, the side surface portion, and the ceiling portion of the heat storage panels of the storage boxes 26, 27. Therefore, a substantially uniform temperature (-3 ° C
Air at ~ -2 ° C) contacts the heat transfer panel.

The air sucked by the blower 42 from the opening of the horizontal partition plate is again blown toward the evaporator 40 and cooled. By repeating this flow of air, the inside of the storage box has a predetermined temperature
Gradually cool to 1 ° C ± 0.5 ° C (-1.5 ° C to -0.5 ° C). The temperature sensor 54 indicates the temperature inside the storage boxes 26, 27.
Is detected, the detection result is transmitted to the control device 52, and the operation of the compressor 34 is controlled, so that the inside of the storage boxes 26, 27 is maintained at a predetermined temperature.

Since the temperature difference between the cooling temperature of the heat transfer panel (-3 ° C to -2 ° C) and the air temperature in the storage box (-1 ° C ± 0.5 ° C) is close to the limit value of 1 ° C, the humidity in the storage box is Maintains high humidity of 90% RH without lowering.

FIGS. 5 and 6 show another embodiment (a type in which an opening is provided on the side surface of the horizontal partition plate).
The vertical partition plate 32 is installed on one side surface of the storage box 26, and the air flow in the storage chamber is different from that of the first embodiment, and is configured to flow to the ceiling side surface bottom surface side view / rear view ceiling part. is there. Since the structure is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted.

Effect As described above, the device according to the present invention bypasses the fluid cooled by the evaporator immediately with the storage box and uses the horizontal and vertical partition plates as the temperature buffering means to detour in advance to obtain an appropriate temperature. Since it is configured to be brought into contact with each other, it is possible to prevent the storage box from being locally cooled, and
The temperature change inside the storage box can be reduced.

Since the temperature change can be controlled to be small, the generation of frost can be suppressed as much as possible, and fresh food products can be stored at high humidity (80 to 90% RH).

Further, since the horizontal partition plate and the vertical partition plate are configured to forcibly flow the cooling air to the bottom, the cooling air flow can be made uniform.

[Brief description of drawings]

1 to 6 show an embodiment of the device according to the present invention. FIG. 1 is a side vertical sectional view of the device, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 1 is a sectional view taken along line III-III in FIG. 1, FIG. 4 is a partially enlarged sectional view showing the structure of a partition plate, FIG. 5 is a longitudinal sectional side view of an apparatus showing another embodiment, and FIG. 6 is FIG. of
VI-VI sectional view, FIG. 7 is a longitudinal sectional view of an apparatus showing a prior art. 20 ... Casing, 22a, 22b ... Door body 24 ... Air passage, 26, 27 ... Storage box 30 ... Horizontal partition plate, 32 ... Vertical partition plate 34 ... Compressor, 36 ... Condenser 38 ...... Decompression means, 40 …… Evaporator 42 …… Blower, 44 …… Guide hole 46 …… Guide plate, 48 …… Solenoid valve 50 …… Defrost sensor, 52 …… Control device 54 …… Temperature sensor, 56, 57 …… Drain pipe 58 …… Sealant

Claims (3)

[Scope of utility model registration request] 1. A storage chamber covered with a casing made of a heat insulating material and a door body made of a heat insulating material, and a door body installed in the storage chamber so as to form an air passage with a predetermined space separated from the casing. And a vertical partition plate for partitioning an air passage between the casing provided on the back or side of the storage box and the storage box with a space from the ceiling of the casing. And a horizontal partition plate that partitions the air passage between the storage box and the ceiling part installed so as to be continuous with the vertical partition plate, and the bottom side of the vertical partition plate and the door side or side surface of the horizontal partition plate. Side is provided with an opening for air circulation, an evaporator of the refrigeration cycle is arranged on the casing side of the air passage, and an air circulation blower is attached to the opening of the horizontal partition plate. apparatus 2. The fresh food preservation apparatus according to claim 1, wherein the storage boxes installed in the storage room are installed in a plurality of columns vertically with a predetermined space therebetween. 3. A utility model registration claim 2 characterized in that a guide hole is formed in a vertical partition plate at a position slightly above the ceiling of the lower storage box installed in a plurality of vertical stages. The fresh food storage device described.