JPS58216683A - Quick cooler for food, etc. - Google Patents

Abstract

PURPOSE:To cool quickly a food, etc. in a partitioned part, by partitioning part of a cooler to give a quickly cooling chamber, sealing solid particles in it, sending cooling air from the bottom of the partitioned part so that the solid particles are fluidized around surroundings of the food, etc. put in it. CONSTITUTION:In a cooler for food, etc. wherein ther thermally insulated box 1 is equipped with the cooling cycle unit 5, a partitioned part for putting the food 11, etc. to be quickly cooled in it is set in the box 1, the solid particles 14 such as fine glass particles, etc. are sealed in it, and the top and the bottom of the partitioned part are equipped with the meshes 17 and 13 which prevent the solid particles 14 from passing through these meshes and let air flow freely. Cooling air is sent from the bottom mesh 13 so that the solid particles are fluidized around the surroundings of the food 11, etc., the effect to disturb the flow of air on the surface of the food, etc. is produced, theremal conductivity effect is caused by bringing directly the solid particles into contact with the surface of the food, and thermal conductivity is improved by using the synergistic action of both the effects, so that quick cooling can be effected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rapid cooling device for foods, etc., and particularly to a rapid cooling device suitable for rapidly cooling foods, etc. within one section of the cooling device.

In the home freezing process due to recent changes in the food distribution system, it is sometimes necessary to freeze foods within a short period of time in order to maintain the quality of the food. In addition, beer and the like are often cooled quickly in homes during the summer.

Conventionally, in such cases, methods have been adopted, such as lowering the temperature of the evaporator in the refrigeration cycle unit to supply colder air at a lower temperature, or opening (widening) the cold air supply passage to increase the amount of cold air supplied. However, this cooling power formula is a convection heat transfer power formula that uses heat conduction using air as a medium.

Its low heat transfer coefficient makes it difficult to achieve the desired rapid cooling. Therefore, if we try to improve the heat transfer coefficient by increasing the wind speed of cold air, there will be a lot of heat leakage outside of actual refrigeration (
The object of the present invention is to provide a cooling device which solves the drawbacks of the prior art and makes it possible to rapidly cool food, etc.

In short, in the cooling device of the present invention, a part of the overall device is divided into a quenching chamber, solid particles are inserted therein, and cold air is sent from below the zone to cause the solid particles to surround the food, etc. stored there. In addition to the effect of floating (1) causing a filtration state and (5) disturbing the flow of air on the surface of foods, etc., the solid particles directly contact this surface, causing a heat conduction effect,
Rapid cooling is made possible by utilizing the synergistic effect of both effects to improve heat transfer coefficient.

The present invention will be explained below with reference to illustrated embodiments. FIG. 1 shows a refrigerator equipped with a refrigeration cycle unit 5, in which a main body 2 of a box 1 is provided with a heat insulating material 4 by a known technique, a door 3, an H-condenser 6, a condenser 7. Pressure reducer8. Evaporator 9 that absorbs heat inside the refrigerator and fan 1 for ventilation circulation
A freezing cycle unit 5 consisting of 0 is provided.

Then, as shown in Figure 5, a section is provided as a quenching chamber, a shelf net 12 is arranged below the section, a peel bottle serving as the food 11 to be quenched is placed on it, and an internal door 20 that can be freely opened and closed is provided at the top. At the same time, the quenching chamber is divided by placing a side cover 15 that can swing around the rotating shaft 16 and placing an upper mesh 17 above it, and a mesh 13 below it to divide the shelf. Solid particles 14 are placed between the person 1 and the net 12. The solid particles 14 are preferably made of a material with high thermal conductivity and low specific heat, such as fine particles of glass. A duct cover 18 forms a ventilation duct for the evaporator 9 and the fan 10, and has openings 19 in its upper and lower parts, respectively.

Next, the operating state of this cooling device will be explained. When the refrigeration cycle unit 5 is operated, as shown in FIG. The exchanged cold air is sent through the mesh 16. As a result, the solid particles 14 are blown up around the food 11 and become a floating fluid state, and heat transfer on the surface of the food 110 is carried out by the solid particles 14. Due to the synergistic effect of the turbulent air flow and the heat conduction effect of the solid particles 14 directly contacting the food 11, the heat transfer coefficient is improved compared to normal convection heat transfer.This increases the time required for cooling. can be shortened compared to the usual convection heat transfer.In addition, the solid particles 14 are connected to the inner door 20 and the upper mesh 5L17 in the upper part.
This prevents inflow into the outside of the quenching chamber and into the ventilation duct of the evaporator 90, and the mesh 116 at the bottom prevents outflow, so that the flow always remains in the quenching chamber and is stable. The state can be maintained.

FIG. 3 is an explanatory diagram of the heat exchange situation inside the refrigerator during normal cooling operation that does not require rapid cooling. In normal cooling operation, the side cover 15 is rotated to store the solid particles 14 at the bottom of the shelf network 12, and the freezing cycle unit is operated, and the air inside the refrigerator is circulated by the fan 10 as shown by the arrow. Circulation occurs through both the upper and lower openings 19 of the duct cover 18, and the food 11 is cooled only by convective heat transfer.

FIG. 4 is a longitudinal sectional view of a refrigerator showing another embodiment of the present invention. 1 and those marked with Ministry No. 1 represent the same parts and have the same functions. Here, the device is made into a unit as a rapid cooling device, the skin cooling unit 21, and can be easily attached to, for example, the refrigerator compartment 22 by removing the shelf net 12. Rapid cooling can be achieved by a simple structural change such as providing an air outlet 23, and the range of use can be expanded.

The rapid cooling device for foods and the like described above has the following effects.

In conventional rapid cooling, heat transfer to food is carried out only by convective heat transfer, resulting in poor heat transfer efficiency.However, in the present invention, solid particles are suspended around the food to fluidize it, thereby improving heat transfer. IF rate is four times higher than traditional convection heat transfer
The time required for cooling can be reduced by 10 to 10 minutes.
It can be shortened by about 20%. Therefore, when applied to home freezing, the structure of the food is less likely to be destroyed than in the past, and the crystal grains can be made smaller, making it possible to maintain good quality. Furthermore, since the time can be shortened even when rapidly cooling beer or the like, it is highly practical and meets the needs of users.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a refrigerator showing one embodiment of the present invention. FIG. 2 is an explanatory diagram of the heat exchange situation during rapid cooling operation. FIG. 3 is an explanatory diagram of the heat exchange situation during normal cooling operation. Figure 4 shows
FIG. 3 is a longitudinal sectional view of a refrigerator m1 according to another embodiment of the present invention. 1: Box body 4: Insulating material 5: Refrigeration cycle unit 9: Evaporator 10: Fan 11: Food 12: Shelf net 13.17: Messenger: L 14: Solid particles 15: Side cover 17.19: Ventilation duct opening Representative Patent Attorney Susuki 1) Li Kosai f Figure'1 Sai2 Figure': P, 3 Figure2ρ Sai4 Illustrated book

Claims (1)

[Claims] In a food cooling device comprising a refrigerating cycle unit disposed in an insulated box, a compartment for storing food to be rapidly cooled is provided in the box, solid particles are inserted into the interior of the compartment, and Meshes that prevent the solid particles from passing through and allow ventilation are disposed above and below the compartment, and cool air is sent from the lower meshi to fluidize the solid particles, thereby creating a flow inside the compartment. A rapid cooling device for 1-fila foods, etc., characterized in that it is configured to rapidly cool foods, etc.