JPS63185359A - Device for preserving perishable food - Google Patents

Abstract

PURPOSE:To prevent reduction in humidity of a storage box, by setting the storage box made of heat transfer panels in a storing chamber consisting of casing of a heat-insulating material and a door of a heat-insulating material and laying an inner room machine and a blower of a cooler between the storing chamber and the storage box. CONSTITUTION:A storing chamber consists of a casing 1 and a door 2 of heat- insulating material. A storage box 10 made of heat transfer panels is made in the storing chamber. Opening of the storage box 10 is coincident with the door 2. An inner room machine 8 and a blower 17 of a cooler are laid in space 4 between the casing 1 of the storing chamber and the storage box 10. Consequently, the inside of the storage box 10 is indirectly cooled and prevented from drying.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application The present invention is designed to keep the inside of a storage box at 60% RH so that fresh foods such as vegetables can be stored for a long time without losing their freshness.
This invention relates to an indirect cooling type storage device using cooling air that maintains the above-mentioned high humidity.

BACKGROUND TECHNOLOGY Conventional fresh food storage devices have a storage chamber 30 having an opening 29 at the front for storing stored items, as shown in FIG. A cooler 31 is arranged at the lower part of the storage room 30 to cool the inside of the storage room 30, and cold air is forcedly circulated into the storage room 30 by blowing air to the cooler 31, which is arranged to be spaced apart from and facing the cooler 31. A circulating air blower 32, a temperature regulator 34 that is provided in contact with the cooler 31 and includes a heat sensitive part 33 that senses the temperature of the cooler 30, and a narrow gap between the heat sensitive part 33 of the temperature regulator 34. The storage chamber 30 is provided with a baffle plate 35 that is provided to prevent wind from the circulation blower 32 from hitting the storage chamber 30 according to the setting of the rotational speed of the circulation blower 32.
A refrigerated showcase (Japanese Patent Publication No. 61-48070) designed to adjust the humidity inside is known. In the case of this showcase, cold air is blown out from the top side of the opening 29 toward the suction port 36, and this cold air causes the opening 29
An air curtain is used to cool the stored items in the storage chamber 30.

Problems to be Solved by the Invention However, in the case of such conventional showcases, when frost forms on the cooler and the humidity drops, low-humidity air is supplied into the storage chamber, and the moisture contained in the stored items is There are disadvantages such as the release of water and drying.

Furthermore, during defrosting, in the conventional defrost system, in addition to heat transfer from the partition plate, warm air directly enters the storage chamber and heats the stored items, which may cause quality deterioration.

Furthermore, if a brine method is adopted, the refrigerator must be completely sealed in order to allow the brine to flow inside the refrigerator, which complicates the structure. In the past, there was an inconvenience that it took a long time to defrost the walls of the storage chamber.

SUMMARY OF THE INVENTION In view of the drawbacks of the prior art, it is an object of the present invention to provide a fresh food storage device that has a relatively simple structure and that prevents stored items from being completely heated during defrosting.

A means for solving the problem, that is, the present invention, includes a storage chamber covered with a casing made of a heat insulating material and a door body made of a heat insulating material, and an opening in the interior of the storage room abutting against the door body. It also consists of a storage box consisting of a casing and a heat transfer panel installed at a predetermined interval, and the storage box and This objective is achieved by a fresh food storage device that circulates cooling air between the casings.

After opening the door body of the functional storage device and putting in the stored items, the door body is closed to form the storage box into a sealed structure. When the cooling means is then activated, the air is completely cooled and then blown out toward the storage box by the blower.

Since the opening of the storage box and the door body are in contact with each other to create a sealed structure, the blown air does not enter the storage box, and flows through the heat transfer panel that forms the storage box. Cool the inside. The air that has cooled the heat transfer panel is guided to the cooling means by the suction action of the blower, cooled again, and blown out toward the storage box.

Embodiment The present invention will be explained in detail below according to an embodiment shown in FIGS. 1 and 2.

Reference numeral 1 denotes a casing made of a heat insulating material and has an opening in the front part. The opening of the casing 1 is closed by a door body 2 made of a heat insulating material and pivotally mounted to be openable and closable. In the storage room covered by the casing 1 and the door body 2, storage boxes 3a and 3b made of heat transfer panels whose openings are in contact with the door body 2 are installed in two vertical stages at a predetermined interval. has been done. Therefore, the inside of the storage box 3 has a sealed structure that prevents circulating air from entering when the door body is closed. The ceiling, back, bottom, and both side surfaces of each heat transfer panel of the storage box 3 are separated by a predetermined distance from the casing 1 made of the heat insulating material, and the space formed there is an air passage 4. . In the space formed by the back side of the heat transfer panel and the casing 1, a compressor 5. Condenser6. A pressure reducing means 7 such as a capillary tube and an evaporator 8
An evaporator 8 of a refrigeration cycle is installed in contact with the casing 1, and the space between the evaporator 8 and the back side of the heat transfer panel has a temperature difference between the outlet and inlet of the evaporator 8. A bypass passage 9 is provided as a temperature buffer means for reducing the size.

A hot gas bypass pipe 21 is connected via a solenoid valve 20 between the refrigerant inlet of the evaporator 8 and the refrigerant outlet of the compressor 5 of the refrigeration cycle.

This electromagnetic valve 20 is connected to a defrost end detection thermosensor 22 which is located close to the ceiling of the heat transfer panel forming the storage box 3.
In accordance with a signal from the control device 23 into which the detection result is input, the bypass pipe 21 is opened when frost adheres to the storage box 3, and the bypass pipe 21 is closed when the frost is removed.

The ceiling of the storage box 3 is made of a corrugated heat transfer panel 10 to improve heat transfer efficiency. Directly below the heat transfer panel 10, a drain pan 12 with a large number of protruding cold air passage holes 11 and an upwardly bent edge is installed so as to be inclined toward the back surface. A notch 13 is provided at one end of the back surface of the drain pan 12, through which the drain flows downward along the back surface of the heat transfer panel. The drain hole 15 of the storage box 3a and the drain pan 12 of the storage box 3b communicate with each other via the vibrator 14, and the drain hole 15 of the lower storage box 3b discharges the drain to the outside via the drain pipe 16. It is supposed to be done. 17 is a blower.

In the configuration described above, in the embodiment of the storage device according to the present invention, when the refrigeration cycle is operated as shown in the time charts of FIGS. 3 and 4, the evaporator 8
to cool the air passing through it. The cooled air is mixed with the air flowing from the bypass passage 9 and becomes air with a small temperature difference between the outlet and the inlet of the evaporator, with a temperature of about -8°C to -3°C. It was formed by a thermal panel and a casing 1. Air is blown into the space. The blown air cools the heat transfer panel to about -36°C to -2°C, and the cooled heat transfer panel cools the air inside the storage box and closes the storage box 3.
The interior is kept at low temperature (about -2℃~-1℃) and high humidity (90%R).
(about H). This temperature and humidity condition has extremely small amplitude.

Furthermore, in this embodiment, since a bypass passage is provided, the amount of air blown is large, and the entire heat transfer panel is uniformly cooled.

In this embodiment, the ceiling portion of the heat transfer panel is formed in a corrugated shape, so that the heat exchange rate is higher than that of other heat transfer panels. When the ceiling of the heat transfer panel is cooled, frost or dew may adhere to the ceiling inside the storage box 3, and the dew may fall downward and wet the products.

However, since the drain pan 12 is already installed, the product will not get wet. Furthermore, in order to prevent the cooling from the ceiling from decreasing due to the installation of the drain pan 12, in the embodiment of the present invention, the drain pan 12 is provided with a large number of cold air passage holes 11.

Furthermore, as shown in FIG. 2, the cold air passage holes 11 in the drain pan 12 are provided under the peaks of the corrugated panel 1o to prevent dew from falling onto the product through the passage holes 11. .

The thermosensor 22 detects the adhered frost and causes the control device 23 to open the solenoid valve 2o. As a result, hot gas flows into the evaporator 8 via the bypass pipe 21 and heats the air. The heated air warms the heat transfer panels that make up the storage box 3, so the frost that has adhered to the inside of the storage box 3 melts, and the drain pan 12. It can be completely discharged outside through the drain pipe 16. The thermosensor 22 detects the end of defrosting and notifies the control device 23 of the solenoid valve 2o.
Close it and start cooling again.

Effects As described above, the device according to the present invention uses an indirect cooling method using a heat transfer panel without directly blowing cold air cooled by a cooler onto the stored items, so there is no influence from cooling air as in the conventional method. Less is.

In addition, since the cooling air is circulated in a sealed state, even when defrosting the evaporator, hot air does not directly enter the storage box, minimizing the impact on stored items. be able to.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the device according to the present invention, FIG. 1 is a longitudinal sectional view of the device, and FIG.
-■ Cross-sectional view, Figure 3 is a time chart showing humidity changes in the storage box of the storage device, Figure 4 is a time chart showing the relationship between temperatures at each point, and Figure 5 is a device showing the conventional technology. FIG.

Claims (3)

[Claims] (1) A storage room covered with a casing made of a heat insulating material and a door body made of a heat insulating material, and installed inside the store room with an opening in contact with the door body and at a predetermined distance from the casing. and a storage box made of a heat transfer panel, and cooling air is circulated between the storage box and the casing by a cooling means consisting of a refrigeration cycle evaporator and a blower placed in the space between the storage box and the casing. A fresh food storage device featuring: (2) The fresh food storage device according to claim 1, wherein the ceiling of the heat transfer panel forming the storage box is corrugated. (3) A drain pan according to claim 1 or 2, characterized in that a drain pan having a large number of cold air passage holes projecting upward is installed below the ceiling of the heat transfer panel in the storage box. Perishable food preservation equipment.