JPH09330U - Thermal insulation box structure in refrigeration equipment - Google Patents

Abstract

(57) [Abstract] [Problem] It is difficult for the cold heat in the cold air space to escape to the outside, and
(EN) Provided is a heat insulating box structure which facilitates dissipating cold heat in a cold air space into a refrigerating room. A refrigerating apparatus is provided in a heat-insulating box body including an inner box 3, an outer box 4 and a heat insulating material 20, and in a cool air space defined in the heat-insulating box body, and defines a refrigerating chamber inside. It has a refrigerating box 2 and a door. The decorative frame 10 is arranged on the inner surface of the heat insulating box along the opening edge of the heat insulating box to thermally connect the inner box and the outer box. The annular projection 5 formed to project from the inner surface side of the heat-insulating box toward the refrigerating chamber has a side surface of the annular projection located on the door side that is deeper with respect to the door than the opening edge of the outer box. The flange 7 of is fixed closely. The flange 7 of the refrigerating box is curved in an L shape and is exposed on the inner surface of the door.

Description

[Detailed description of the device]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a structure of a heat insulating box used in a refrigerating device or the like, and more particularly to a connection structure between a heat insulating box and a refrigerating chamber provided therein.

[0002]

[Prior art]

 There are many examples in which a heat insulating box is used in a refrigerator. The reason is that, in a refrigeration system, the air inside is cooled to a required temperature and the objects are stored in a low temperature state, so it is necessary to keep the environment insulated from the outside atmosphere.

For example, Japanese Patent Application Laid-Open No. 61-16876 of the present applicant discloses a refrigerator as an example of a heat-insulating box whose inside is cooled by a refrigerator. The refrigerator of this earlier application is aimed at the preservation of fresh food, and further has a refrigerating room of another structure in the heat insulating box. Although the detailed structure is not shown in the publication, in general, many heat insulating boxes have the structures shown in FIGS. 5 and 6. In FIG. 5 and FIG. 6, a refrigerating box 2 defining a refrigerating chamber 18 for storing food etc. is provided in the heat insulating box 1.

An evaporator, that is, a cooler 12 in which the refrigerant compressed by the refrigerant compressor 11 and thereafter condensed is evaporated is installed in the back of the heat insulating box 1, and the cooled air is supplied to the internal fan 13. Therefore, it contacts the refrigerating box 2 from the outside and cools it. The moisture of the air condensed by cooling flows out from the drain hole 16. In particular, as shown in FIG. 6, the inner box 3 and the outer box 4 of the heat insulating box 1 are connected by a flat-shaped decorative frame 10. The inner box 3 rises and forms a step at the peripheral edge so that the condensed moisture described above does not flow out, and the outer box 4 has a concave portion so as to receive the L-shaped decorative frame 14 of the refrigerating box 2 described later. Is forming. The L-shaped decorative frame 14 fixed to the opening edge of the refrigerating box 2 and the decorative frame 10 are fixed to the heat insulating box 1 with screws or the like, but are made of resin and have a lower thermal conductivity than metal. Reference numeral 15 indicates caulking for filling the gap in the connecting portion.

[0005]

[Problems to be solved by the device]

 In the above-mentioned conventional structure, a cold air space is defined between the inner box 3 and the refrigerating box 2 of the heat insulating box 1, and the cold air space is the front surface of the outer box 4 (right side rising surface in FIG. 6). Since it directly faces the decorative frame 14 which is flush with the decorative frame 14, although the decorative frame 14 is formed of a low heat conductive material, cold air is easily transmitted to the outside. Further, since the decorative frame 14 is provided as described above, the surface area of the cold air space defining surface exposed to the refrigerating compartment 18 is reduced, which causes a decrease in cooling efficiency of the refrigerating compartment. Therefore, the main object of the present invention is to provide a heat insulating box structure in which cold heat in the cold air space does not easily escape to the outside. Another object of the present invention is to provide a heat insulating box structure that not only makes it difficult for the cold heat in the cold air space to escape to the outside, but also makes it easier to dissipate the cold heat in the cold air space into the refrigerating chamber.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the heat insulating box structure of the present invention as set forth in claim 1, there is provided an inner box, an outer box and a heat insulating box body filled with heat insulating material between them, and the heat insulating box. A refrigerating apparatus which is provided in a cold air space defined in the body and has a refrigerating box that defines a refrigerating chamber inside, and a door that openably and closably closes the heat insulating box and the front opening of the refrigerating chamber In the above, the decorative frame is arranged on the inner surface of the heat insulating box along the opening edge of the heat insulating box to thermally connect the inner box and the outer box, and from the inner surface side of the heat insulating box, On the side of the annular protrusion located on the door side, the annular protrusion formed to project toward the refrigerating chamber side is positioned deeper with respect to the door than the opening edge of the outer box, and the opening edge of the refrigerator box is It is closely fixed. Further, according to the present invention as set forth in claim 2, the opening edge of the refrigerating box is curved in an L shape and is exposed to the inner surface of the door. The annular protrusion is formed so as to protrude from the decorative frame screwed into the heat insulating box toward the refrigerating compartment side, and is screwed at the upper end portion to the opening edge of the refrigerating box. It is preferable.

In the heat-insulating box body having the above-described structure, the annular projection formed by projecting from the inner surface side of the heat-insulating box body to the refrigerating chamber side is provided with Since the opening edge of the refrigerating box is tightly fixed at a position deeper than the door, the opening edge of the refrigerating box is separated from the outer box as much as possible, and the conduction of cold heat to the outside is reduced. Further, by connecting the annular projection and the opening edge of the refrigerating box as described above and forming the opening edge in an L shape, the heat transfer area of the cold air space on the side facing the door becomes wide.

[0008]

[Embodiment of the invention]

 Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. In FIG. 1, a compressor 11 is installed above the heat insulating box 1 and communicates with an evaporator or cooler 12 in the heat insulating box 1 via a cooling medium circuit (not shown). A refrigerating box 2 is supported in the heat insulating box 1 via a decorative frame, which will be described later, and defines a refrigerating chamber 18 therein. The front openings of the two refrigerating chambers 18 are normally closed by a door 19 having a heat insulating structure which is openably and closably provided by a hinge or the like, but when food is taken in and out, it is opened as shown in FIG. FIG. 4 is a perspective view showing a state in which one refrigerating box 2 is taken out forward in order to make the structure easy to understand. When the door 19 is closed, the door 19 is brought into close contact with the front surface 17 of the main body and traps cool air inside.

Returning to FIG. 1 again, an internal fan 13 is installed above the inside of the heat insulating box 1 to circulate the cool air cooled by the cooler 12, and the refrigerating box 2 made of a heat conductive metal plate is It is suitably cooled from the outside. That is, the space between the heat insulating box 1 and the refrigerating box 2 is a cold air space, and the cold air flowing therein cools the refrigerating chamber 18 in the refrigerating box 2. A drain hole 16 is provided at the bottom of the heat insulating box 1 to discharge water condensed by cooling. In this embodiment, two refrigerating chambers 18 are provided, but the number of refrigerating chambers 18 can be set to an appropriate number depending on the refrigerating capacity, size, and use.

In FIG. 2, which is an enlarged view of the portion indicated by the arrow II in FIG. 1, the inner box 3 formed in a plane shape different from the conventional step structure is adjacent to the front surface 17 of the main body (see FIG. 4). In the portion, there is no recess unlike the conventional structure, and a flat body front surface 17 is formed. A heat insulating material 20 is filled between the inner box 3 and the outer box 4. The decorative frame 10 screwed to the outer box 4 and the inner box 3, that is, fixed with screws, is made of resin, which is a relatively low heat-conducting material, to prevent heat loss. Have a face. The main protrusion (annular protrusion) 5 extends over the entire length of the decorative frame 10 and forms an annular shape as a whole, but a soft material 8 as a cushioning material is provided on the surface on the door 19 side (the rising surface on the right side in FIG. 2). The flange (opening edge) 7 of the refrigerating box 2 is fixed via this and supports it. Further, as shown in FIG. 2, the L-shaped curved flange 7 is attached to the annular main protrusion 5 at a position deeper than the opening edge of the outer box 4 with respect to the door.

Instead of the soft material 8, as shown in an exploded view of FIG. 3, a packing material 6 may be used as a cushioning material. In this way, the refrigerating box 2 is in close contact with the decorative frame 10 and screwed into the decorative frame 10 as shown in the figure to block cold air leakage. Further, the decorative frame 10 is formed with a second low projection or small projection 9 near the front surface 17 of the main body, and the small projection 9 extends over the entire length thereof like the main projection 5 to form an annular shape. A water reservoir recess is formed on the opposite side of the annular projection 5 with respect to the flange 7 described above. In this way, a kind of pool is formed between the main projection 5 and the small projection 9, and the water droplets flowing out from the refrigerating chamber 18 are retained in this pool and do not flow out directly to the front surface 17 of the main body. Due to the nature of this water drop, it does not become so large, and may be wiped and cleaned appropriately.

[0012]

[Effect of the invention]

 According to the present invention as set forth in claim 1, in the annular projection formed to project from the inner surface side of the heat-insulating box toward the refrigerating chamber, the side surface of the annular projection located on the door side is closer to the opening edge of the outer box. Also, since the opening edge of the refrigerating box was fixed closely at the back of the door, the opening edge of the refrigerating box was separated from the outer box as much as possible, and the conduction of cold heat to the outside was reduced, resulting in cooling. The efficiency can be improved. Further, as described in claim 2, when the annular projection and the opening edge of the refrigerating box are connected and the opening edge is formed in an L shape, the heat transfer of the cool air space on the side facing the door is achieved. The area is increased and the cooling efficiency can be further improved. As described in claim 3, the annular projection is formed so as to project from the decorative frame screwed to the heat insulation box body to the refrigerating compartment side, and is screwed to the opening edge of the refrigerating box at the upper end thereof. Accordingly, it is possible to provide a high-strength heat-insulating box structure that is strong against bending load to the inside of the refrigerating compartment and that suspends the refrigerating box above the heat-insulating box.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a preferred embodiment of the present invention.

FIG. 2 is an enlarged partial cross-sectional view showing a main part indicated by an arrow II in FIG.

FIG. 3 is a partially exploded view showing a main part of another embodiment.

FIG. 4 is a partially exploded perspective view of the embodiment of FIG.

FIG. 5 is a vertical sectional view showing a conventional one.

6 is a partially enlarged sectional view of FIG.

[Explanation of symbols]

1 ... Insulation box, 2 ... Refrigerator box, 3 ... Inner box, 4 ... Outer box, 5 ...
Main projection (annular projection), 7 ... Flange (opening edge of refrigerating box), 10 ... Cosmetic frame, 18 ... Refrigerating room, 19 ... Door, 20
… Insulation.

Claims (3)

[Utility model registration claims] 1. An insulating box body comprising an inner box, an outer box and a heat insulating material filled between the inner box and the outer box, a cold air space defined in the heat insulating box body, and a refrigerating chamber inside. A refrigerating apparatus having a defining refrigerating box and a door for opening and closing the front opening of the heat insulating box and the refrigerating chamber, wherein makeup is applied to the inner surface of the heat insulating box along the opening edge of the heat insulating box. A ring-shaped projection located on the door side on an annular projection formed by arranging a frame to thermally connect the inner box and the outer box, and projecting from the inner surface side of the heat-insulating box body to the refrigerating compartment side. A heat insulation box structure in a refrigerating apparatus, wherein an opening edge of the refrigerating box is closely fixed at a position deeper than the opening edge of the outer box with respect to the door on a side surface of the protrusion. 2. The heat insulating box structure according to claim 1, wherein the opening edge of the refrigerating box is curved in an L shape and is exposed at the inner surface of the door. 3. The annular projection is formed so as to project toward the refrigerating compartment side from the decorative frame screwed to the heat insulating box body, and is screwed to the opening edge of the refrigerating box at an upper end portion. The heat insulating box structure according to claim 1 or 2, which is combined.