JPH02223780A - Cooling and storage case - Google Patents

Abstract

PURPOSE:To equalize the temperature of an upper storage chamber to the same of a lower storage chamber by a method wherein the surfaces of the space of firstly cooled heat conductive case between upper and lower heat conductive cases are bonded with a heat insulating material. CONSTITUTION:Cold air, effecting heat exchange in an evaporator 12, is discharged by a fan 13 from an air outlet port 9 into a cold air passage 6 and is circulated in a route shown by arrow signs in a diagram. The cold air cools the upper surface, rear surface, both of side surfaces and the bottom surface of an upper heat conductive vase 4 at first, then, passes through a communicating port 19 and cools the upper surface, rear surface, both of side surfaces and the bottom surface of a lower heat conducting case 5, then, passes through a return passage 6B from the communicating port 18 and is returned to the evaporator 12 again through an air suction port 10. In this case, foamed polyethylene sheets 21, having a proper thickness, are bonded to all of the surfaces of the side of the cold air passage 6 of the upper heat conductive case 4 and, therefore, heat exchanging rate between the cold air and the upper heat conductive case 4 is reduced. As a result, the cooling temperature of the upper heat conductive case 4 is equalized substantially to the cooling temperature of the lower heat conductive case 5 whereby the temperature of the upper storage chamber 7 may be equalized substantially to the temperature of the lower storage chamber 8.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a cooling storage that indirectly cools upper and lower storage chambers defined inside a storage main body by circulating cold air.

(B) Prior art As a prior art, Japanese Patent Application Laid-open No. 61-6570 discloses that an inner box is placed in a storage chamber of a heat insulating box made of an outer box, an inner box, and a heat insulating material filled between the two boxes. A storage is disclosed in which a plurality of compartments are formed that do not communicate with each other, and cool air that has been heat exchanged with a cooler is circulated through a cold air passage by a blower, so that indirect cooling is performed sequentially from the top compartment.

(c) Problems to be Solved by the Invention In this prior art storage, cooling starts from the top six interior boxes, so when cooling the bottom interior boxes, the temperature of the cold air in the cold air passage increases. As a result, the temperature of the lowermost compartment becomes higher than the temperature of the uppermost compartment.

In view of such problems, the present invention provides a cooling storage for the purpose of making the temperature of the upper storage chamber and the lower storage chamber uniform.

(d) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has provided that upper and lower thermal conductivity boxes are disposed inside a storage main body formed of a heat insulating wall, with a space between them and the heat insulating wall. Installation 7 The insides of the upper and lower heat conduction boxes are respectively designated as an upper storage room and a lower storage room, and a refrigeration system evaporator and a cold air circulation blower are arranged in the space between the insulation box and the upper and lower heat conduction boxes. In a cooling storage warehouse configured to indirectly cool the upper and lower storage chambers, a heat insulating material is provided on the space side surface of the heat conduction box on the side to be cooled first among the upper and lower heat conduction boxes. It is a cooling storage made of adhesive.

(E) Function According to the present invention, the temperature of the upper storage chamber and the lower storage chamber can be made uniform by lowering the heat transmission coefficient of the upper heat conduction box that is cooled first due to the effect of the heat insulating material. can.

(f) Examples Examples of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a storage main body formed of a heat insulating wall 2, which is constructed by filling a heat insulating material between the inner and outer boxes, and its front opening is closed by a door body 3 so as to be openable and closable. Inside this storage main body l, a top heat conduction box 4 and a top heat conduction box 5 made of stainless steel, which are open at the front, are fixedly installed with a space between them and all the inner wall surfaces of the heat insulating wall 2, The space thus formed is defined as a cold air passage 6, and the inner sides defined by the upper heat conduction box 4 and the upper heat conduction box 5 are defined as -1=storage chamber 7 and lower storage chamber 8, respectively.

In addition, the ceiling wall of the heat insulating wall 2 and the one heat conducting box 4 facing it
In the cold air passage 6 between the upper surfaces, a unit cover 11 having an air outlet 9 at the front and an inlet 10 at the rear is disposed as a cooling means, and a refrigeration system is installed inside the unit cover 11. Evaporator 12 and outlet 9 in front of it
A cold air circulation blower 13 is housed opposite to the air conditioner. The evaporator 12 is connected to an electric compressor 14 and a condenser 15 placed on the ceiling wall of the main body 1 to form a refrigeration cycle 16
is a condenser air cooling fan.

In addition, a vertical partition plate 17 is disposed downwardly in the cold air passage 6 between the rear wall of the heat insulating wall 2 and the rear face of the upper and lower heat conduction boxes 4 and 5 facing thereto, and a discharge passage 6A is provided. It is divided into a return passage 6B, and both passages communicate through a lower communication port 18. Furthermore,
In the cold air passage 6 between the bottom surface of the upper heat conduction box 4 and the L side of the upper heat conduction box 5, a horizontal horizontal partition plate 20 with a communication port 19 formed in the front part is disposed.

Therefore, in the space side (cold air passage 6 side) side of the thermal conductivity box 4 that is cooled first, that is, in the configuration of -F, the cold air passage 6 ([1 For example, a sheet 21 of foamed polyethylene is attached as a heat insulating material to all surfaces of the housing.

In the above configuration, the cold air that has been heat exchanged in the evaporator 12 is discharged from the blower 13 to the cold air passage 6 from the outlet 9, and is circulated in the path shown by the arrow in FIG. After cooling the top surface, rear surface, both side surfaces, and bottom surface through the foamed polyethylene sheet 21, the top surface, rear surface, both side surfaces, and bottom surface of the upper heat conduction box 5 are cooled through the communication port 19, and then from the suction port 1 through the return passage 6B.
0, it is returned to the evaporator 12 again. As a result, the air in the upper storage chamber 7 and lower storage chamber 8 is
It will be indirectly cooled through the

According to the flow of cold air as described above, the upper heat exchanger box 5 is cooled by the cold air after heat exchange with the upper heat exchanger box 4, so generally, the upper storage chamber 7 is lower than the upper storage chamber 7. The temperature of the storage chamber 8 will become high.

However, in the present invention, a foamed polyethylene sheet 21 of an appropriate thickness is provided on all surfaces of the cold air passage 6 side of the heat conduction box 4.
, the heat exchange rate between the cold air and the upper heat conduction box 4 decreases, and as a result, the cooling temperatures of the upper heat conduction box 4 and the upper heat conduction box 5 are approximately equal. -, and the temperatures of the upper storage chamber 7 and the lower storage chamber 8 can be made approximately equal to -.

The thickness of the foamed polyethylene sheet 21 is the same as that of the upper storage chamber 7.
This is determined based on the temperature measurement results of the lower storage chamber 8.

In the embodiment of the present invention described above, since the upper heat conduction box 4 is cooled first, a heat insulating material is pasted around the upper heat conduction box 4, but the upper heat conduction box W5 is If it is cooled first,
A heat insulating material is pasted around the upper heat conducting box 5. Further, the heat insulating material is not limited to the one in the embodiment, and various types can be selected.

(G) Effects of the Invention As described above, the present invention provides a structure in which upper and lower heat conduction boxes are disposed inside a storage main body formed of a heat insulating wall, with a space between the heat insulating wall and the upper and lower heat conduction boxes. The inside of the box will be used as an upper storage room and a lower storage room, respectively, and a refrigeration system evaporator and a cold air circulation blower will be installed in the space between the insulation box and the second and lower heat conduction box. In a cold storage configured to indirectly cool a room.

The use of heat insulating material provides an excellent advantage in that the temperature of the main storage chamber and the lower storage chamber can be made uniform.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a cooling storage according to the present invention, and FIG. 2 is a longitudinal sectional front view thereof. 1...Storage main body, 2...Insulating wall, 4...Upper heat conduction box 5...Upper heat conduction box, 6...Cold air passage (space),
7... Main storage room, 8... Lower storage room, 12... Evaporator, 13... Cold air circulation blower, 21... Foamed polyethylene sheet (insulating material).

Claims (1)

[Claims] 1. Inside the storage main body formed of a heat insulating wall, upper and lower heat conduction boxes are arranged at a distance from the heat insulating wall, and the inside of the upper and lower heat conduction boxes is formed into an upper storage room and a lower storage room, respectively. In addition,
In a cooling storage warehouse configured to indirectly cool the upper and lower storage chambers by disposing a refrigeration system evaporator and a cold air circulation blower in the space between the insulation box and the upper and lower heat conduction boxes, This cooling storage is characterized in that a heat insulating material is attached to the surface of the space side of the heat conduction box, which is the side that is cooled first, among the heat conduction boxes.