JPH0452634Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a cooling storage such as a freezer equipped with an insulated door.

(b) Conventional technology Publication of Utility Model Publication No. 59-33977 (F25D23/00) states,
First and second openings are provided in the vertical planes of first and second convex portions that are provided in an opening formed in a part of a heat insulating wall that constitutes the interior of the refrigerator, and that are located above and below and protrude to the inside and outside of the refrigerator, respectively. A plate body is provided with a heating body disposed on both upper and lower surfaces, a bent part and a vertical part, and is pivotally supported above the first opening in the upper part so as to cover the first opening. A second valve member that includes a first valve member that rotates inward, a bent portion, and a vertical portion, and that is pivotally supported above the second opening in the lower part and that rotates the second opening toward the outside of the refrigerator. and a first and second cover each having a downward guide hole and covering the inside and outside of the opening. When the temperature is lower than the outside, the first valve member opens, and when the opposite is true, the second valve member opens to eliminate the pressure difference between the inside and outside of the refrigerator.Also, the heating element prevents freezing of the plate that forms the boundary between the inside and outside of the refrigerator and both valve members. I am trying to avoid this by

(c) Problems to be solved by the invention According to the above-mentioned conventional technology, in order to adjust the pressure between the inside and outside of the refrigerator, an opening is first formed in a part of the insulation wall, and then a plate is opened. Not only is it necessary to attach both the first and second valve members to the plate and arrange the plate body in the opening, but it is also necessary to constantly heat the pressure regulating device with a heating body, which makes the configuration of the pressure regulating device difficult. Problems arose, such as the large number of parts, high price, and time-consuming installation.

(d) Means for solving the problem The present invention is a cooling storage with an insulated door on the top surface, in which a pressure regulating pipe with one end opening into the storage and the other end opening into the machine room at the bottom of the main unit is used as a cooling pipe. In order to be cooled, the cooling pipe is arranged vertically in the heat insulating material of the main body.

(E) Effect According to the embodiment, when the pressure inside the refrigerator 15 becomes negative, the air outside the refrigerator is pumped through the pressure regulating pipe 16 to the inside 15 of the refrigerator.
As this air enters the refrigerator interior 15, the pressure inside and outside the refrigerator can be balanced, and the air entering the refrigerator interior 15 is heated by heat conduction from the cooling pipe 7. Pressure regulating tube 1 cooled by
6, its temperature is gradually lowered and becomes close to the air temperature inside the refrigerator 15.

(F) Embodiment An embodiment of the present invention will be described below based on the drawings. 1 is a cooling storage called a chest type freezer, which is a metal cooler that is equipped with a meandering cooling pipe 7 on the outer surface. An inner box 3, a metal outer box 4 that stores the inner box, an annular resin decorative frame 5 that covers the upper ends of both the inner and outer boxes 3 and 4, and a space between the two boxes 3 and 4. The main body is composed of a heat insulating box 2 made of a foamed heat insulating material 6 such as hard polyurethane filled with foam, and below the main body there are a refrigerant compressor 8 and a condenser 9 that constitute a refrigeration cycle together with the cooling pipe 7. A machine room 11 is formed in which a blower fan 10 is housed. Reference numeral 12 denotes a heat insulating door that freely opens and closes the upper opening of the heat insulating box 2, and a hinge device 13
It is pivotally supported to be rotatable in the vertical direction relative to the heat insulating box 2, and a handle 14 for opening and closing is attached to the front edge thereof. Reference numeral 15 denotes a warehouse defined by the inner box 3, and an inner box 3 that also serves as a cooler and is equipped with the cooling pipe 7.
Cooled by

16 has one end opening into the refrigerator interior 15 through a notch 17 formed in the inner box 3, and the other end penetrating the outer box 4 and opening outside the refrigerator, for example, in the machine room as shown in FIG. 11, which is a long and thin copper tube that has sufficient hardness not to be deformed by the foaming pressure during foaming of the foamed heat insulating material 6 and has excellent corrosion resistance. It is arranged along this cooling pipe so as to receive conduction, and most of it is buried in the foamed heat insulating material 6.
The pressure regulating tube 16 preferably has an inner diameter that prevents convection of the air inside it, and an adhesive sealant 18 is provided at the joint with the inner box 3 and outer box 4, and this sealant is Therefore, when foaming, the foamed heat insulating material 6 does not leak inside or outside the refrigerator. 1
Reference numeral 9 denotes a bushing made of resin such as Diuracon, which is provided at one end of the pressure regulating pipe 16, that is, at the inner end of the refrigerator, and is inserted into the pressure regulating pipe 16 through the head 20 in contact with the inner surface of the inner box 3 and the notch 17. cylinder part 2
1, and functions to support the pressure regulating pipe 16 when the inner box 3 is disposed inside the outer box 4. Note that this bushing is preferably made of a material that is resistant to frost formation.

According to such a configuration, when the insulating door 12 is opened and food is taken out or put in while the interior 15 of the refrigerator is cooled to freezing temperature, a portion of the air inside the refrigerator and the humid outside air are exchanged, When the heat insulating door 12 is closed, the air that has entered the refrigerator interior 15 is cooled and its volume is reduced, creating a pressure difference between the interior 15 and the exterior of the refrigerator.If the interior 15 becomes negative pressure, the Air from outside the refrigerator is guided into the interior 15 of the refrigerator by the pressure pipe 16 and enters the interior 15 of the refrigerator.As this air enters, the pressure inside and outside the refrigerator can be balanced, and the pressure inside the refrigerator 15 is As the incoming air passes through the pressure regulating pipe 16 which is cooled by heat conduction from the cooling pipe 7, its temperature is gradually lowered and becomes close to the temperature of the air inside the refrigerator 15. As a result, the temperature of the air that passes through the pressure regulating pipe 16 and enters the inside 15 of the refrigerator reaches the dew point or above the dew point (depending on the temperature and humidity of the air outside the refrigerator), preventing the moisture contained in the incoming air from freezing on the inner surface of the inner box 3. By avoiding this, it is possible to prevent the opening of the inner side end of the pressure regulating pipe 16 from being blocked due to freezing.

(g) Effects of the device According to the above-mentioned main idea, the following effects are produced.

If the inside of the refrigerator becomes negative pressure, air from outside the refrigerator can be guided into the refrigerator through the pressure regulating pipe to increase the pressure inside the refrigerator and balance the pressure inside and outside the refrigerator.
Eliminates the negative pressure inside the refrigerator, making opening the insulation door extremely easy.

The pressure regulating pipes installed along the cooling pipes are cooled due to the thermal influence of the cooling pipes.
As the air from outside the warehouse enters the warehouse, its temperature is gradually lowered as it passes through the pressure regulating pipe, so the temperature of the incoming air rises above the dew point and the moisture contained in the incoming air is reduced. It is possible to maintain a good air flow condition in the pressure regulating pipe by avoiding the blockage of the opening at the inside end of the pressure regulating pipe due to freezing. Further, since the pressure regulating pipe extends into the machine room, it is easy to receive the influence of the cooling pipe over a long range, and the appearance of the cooling storage is not spoiled, and it is excellent in preventing the intrusion of dust.

[Brief explanation of the drawing]

The drawings all show examples of the proposed cooling storage.
1 is a partially cutaway side view, FIG. 2 is an enlarged view of FIG. 1A, and FIG. 3 is an overall perspective view. 3...Inner box, 4...Outer box, 6...Insulating material, 7...
...Cooling pipe, 12...Insulation door, 15...Inside the refrigerator, 16
...Pressure regulating pipe.

Claims (1)

[Scope of utility model registration request] It consists of an inner box with cooling pipes on the outer surface, an outer box, and a heat insulating material filled in the space between the inner and outer boxes.
In a cooling storage warehouse whose main body is an insulated box with an insulated door on the top surface, a long and narrow pressure regulating pipe with one end opening into the storage room and the other end opening into the machine room at the bottom of the main body,
A cooling storage, characterized in that the cooling storage is disposed in the heat insulating material in a vertical direction along the cooling pipe so as to be cooled by the cooling pipe.