JP3303158B2 - Opening / closing doors for refrigerators, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing door for a cooling box or the like which is suitably used for a cooling box or the like for rapidly cooling heated foodstuffs without freezing.

[0002]

2. Description of the Related Art A refrigerator which can rapidly cool a heated food material to a temperature immediately before freezing while keeping the freshness, taste, nutritional value and the like while suppressing the propagation of various bacteria is disclosed in, for example, the present application. It is known in Japanese Patent Publication No. Hei 7-104090 proposed by a person, and usually, this kind of cooling box is provided with an opening / closing door for opening / closing an entrance / exit portion of a cooling chamber.

FIG. 8 shows a conventional door 50. Door 5
0 is a connection member 5 for connecting the inner panel 51 and the outer panel 52 to each other.
3, the inner panel 51 and the outer panel 52
The space formed by the connecting member 53 is filled with a heat insulating filler 54 such as urethane foam.
55 are fixing devices such as screws for fixing the panels 51 and 52 and the connecting member 53.

[0004] Incidentally, this kind of opening / closing door 50 is provided with a heat insulating tank 6.
The inner panel 51 and the outer panel 52 are made of stainless steel because of the necessity of always maintaining a high degree of heat insulation from the viewpoint of hygiene management. 53 used a plate material such as a bakelite plate having a certain degree of heat insulation. Thus, the entire heat insulating property of the opening / closing door 50 is secured by the heat insulating filler 54 such as urethane foam, and the inner panel 51 and the outer panel 52 are insulated by the connecting member 53 using a bakelite plate or the like. Reference numeral 61 denotes a seal packing, 62 denotes a handle, and 63 denotes a cooling chamber.

[0005]

However, the above-mentioned conventional door 50 has the following problems.

First, since the inner panel 51 and the outer panel 52 are connected by using the connecting members 53 and fixing members 55 such as screws, the cost of parts and the manufacturing cost (man-hours for assembling) are increased, and disassembly is required. It is inferior in recyclability because it becomes serious.

Second, since the inner panel 51 and the outer panel 52 are connected via a connecting member 53 such as a bakelite plate, sufficient heat insulation between the inner panel 51 and the outer panel 52 cannot be performed.

The present invention has solved the above-mentioned problems in the prior art, and eliminates the need for fixing members such as connecting members and screws, thereby greatly reducing component costs and manufacturing costs (man-hours for assembly) and recycling. It is an object of the present invention to provide an opening / closing door for a cooling box or the like, which can improve the heat insulating property and can significantly improve the heat insulating property.

[0009]

SUMMARY OF THE INVENTION The present invention comprises a door housing 1h in which an inner panel 2 and an outer panel 3 are combined, and a cooling chamber M formed by filling the door housing 1h with a heat insulating filler 5. And the like, the peripheral edge of the outer panel 2 is folded back to form grips 6a, 6b, 6c, 6d, and the inner panel 2 can be positioned on the grips 6a and cut off. The positioning pieces 8a, 8b, 8c, 8d are integrally formed, and further, inside the grips 6a, a heat insulating fitting member 4a, 4b, 4 is partially exposed from the grips 6a.
c and 4d are fitted, and the peripheral edge of the inner panel 2 is spaced a predetermined distance S from the gripping portions 6a and is engaged with the exposed fitting members 4a to constitute the door housing 1h. The door housing 1h is characterized by being filled with a heat insulating filler 5.

In this case, according to a preferred embodiment, the inner panel 2 has the engaging edges 2a, 2b formed by bending the peripheral edge.
b, 2c, 2d, and engagement grooves 7 for inserting and positioning the engagement edges 2a in the fitting members 4a.
a, 7b, 7c, 7d are provided. The fitting members 4a ...
Can use styrofoam and heat insulating filler 5
Can use foamed urethane foam.

As a result, the fitting members 4 formed of styrofoam or the like are attached to the grip portions 6a formed on the outer panel 3.
a ..., a part of the fitting members 4a ...
Are engaged with the exposed fitting members 4a, that is, the engaging edges 2a formed by bending the inner panel 2 at the peripheral edges of the inner panel 2 are fitted to the fitting members 4a.
, The outer housing 3, the fitting members 4a, and the inner panel 2 assemble into a door housing 1h, which is positioned relative to each other. In this case, the grip portions 6a of the outer panel 3 and the peripheral edge of the inner panel 2 are arranged with a predetermined interval S therebetween. When the inside of the door housing 1h is filled with the heat-insulating filler 5 such as urethane foam in this state, the inner panel 2, the outer panel 3 and the fitting members 4a are adhered to the heat-insulating filler 5 and integrated. You.

[0012]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, a schematic configuration of a cooling cabinet M provided with the opening / closing door 1 according to the present embodiment will be described with reference to FIGS.

The cooling cabinet M includes a box-shaped heat insulating tank 30 having a cooling chamber R therein. The heat insulating tank 30 has an entrance 31 with a front part 30f left on the front part, and the door 1 according to this embodiment is attached to the entrance 31. One side of the door 1 is rotatably supported by hinges 21... Attached to a heat insulating tank 30, and a lock mechanism 22 and a handle 23 interlocked with the lock mechanism 22 are provided on the other front side of the door 1. In addition, a latch portion 24 for latching the lock mechanism 22 is provided on the front of the heat insulating tank 30.

The heat insulating tank 30 is installed on a cabinet 32 having a cabinet shape. The base 32 has a machine room inside,
This machine room houses the main parts of the two-system refrigeration system. In this case, the base 32 includes a drawer 32p, and the main part of each refrigeration system is disposed on the drawer 32p.
Therefore, at the time of maintenance, it is possible to easily perform necessary inspection, repair, and the like by pulling out the drawer portion 32p toward the user. 33 are legs (casters) provided on the bottom surface of the base 32. Further, the heat insulating tank 30 is installed on the base 32 on the right side, and an electric room is provided on the left outside of the heat insulating tank 30. The electric chamber is covered by a housing part 34, and a pair of upper and lower fan motors 35p. 35q and a switchboard (not shown), and an operation panel 36
Is arranged.

On the other hand, the pair of fan motors 35p. A pair of upper and lower sirocco fans 37p and 37q, each rotating by 35q and circulating cool air in the cooling chamber R, are housed. In this case, the sirocco fans 37p and 37q are disposed on the inner wall of the left side surface 30s and substantially at the center in the front-rear direction. In addition, each sirocco fan 37p, 3
7q and each fan motor 35p, 35q are isolated via the left side surface 30s, and the waterproofness of the fan motors 35p, 35q when the inside of the heat insulating tank 30 is washed with water is ensured.

Further, a first evaporator (heat exchanger) 38 is provided at a position spaced apart in the front-rear direction along the inner wall of the left side surface 30s, that is, in front of the sirocco fans 37p, and at the rear of the sirocco fans 37p. Is provided with a second evaporator 39. The first evaporator 38 and the second evaporator 39 are respectively connected to the main parts of the two-system refrigeration system described above. Each evaporator 38 and 39
Has a plurality of heat exchange tubes arranged along the longitudinal direction through which the heat medium flows and a number of horizontal fins attached to each heat exchange tube, and a plurality of guide plates 40 for guiding the air blow D by the sirocco fans 37p. 41 are attached. Due to the guide plates 40, 41, the air resistance of the blast D is reduced, and the blast D circulates smoothly and stably in the heat insulating tank 30. Further, each evaporator 38, 39 is shown in FIG.
As shown in the figure, because the shape in plan view is configured to be flat,
One end in the longitudinal direction of each of the evaporators 38 and 39 viewed from the plane direction is arranged toward the center of the heat insulating tank 30 (cooling chamber R), and the other end in the longitudinal direction is arranged toward the corner of the left side surface 30s.
On the other hand, to the right of each sirocco fan 37p (cooling chamber R side)
And the first evaporator 38 and the second evaporator 3
A fan cover 43 which is opened and closed by hinges 42.

Each of such sirocco fans 37p, 37
The q and the evaporators 38 and 39 are arranged near the inner wall of the left side surface 30s and inside the front part 30f of the heat insulating tank 30. In particular, each evaporator 38 and 39 expands the effective volume of the cooling chamber R in the space formed on both sides of the sirocco fans 37p and 37q, and is at right angles to the circulation path of the blower D, so that the blower D, The contact efficiency (heat exchange efficiency) is maximized, and the cooling efficiency is increased.
In the drawings, 44 and 45 are a pair of left and right rails provided in the cooling chamber R, and 46 is a drain port provided on the bottom surface of the cooling chamber R.

Next, the structure of the door 1 according to the present embodiment will be described with reference to FIGS.

First, the components of the door 1 will be described. Reference numeral 2 denotes an inner panel made of stainless steel, which is formed in a rectangular shape as a whole, and provided with engaging edges 2a, 2b, 2c, 2d which are bent at right angles on the peripheral edge. The width of each engaging edge 2a is constant, and is provided continuously along the peripheral edge of the inner panel 2.

3 is an outer panel made of stainless steel,
The whole is formed into a rectangle larger than the inner panel 2, and the grip portion 6 is folded back in a J-shape on the periphery.
a, 6b, 6c and 6d are formed. As a result, the outer panel 3 becomes a hollow inner box having a certain thickness,
As shown in FIG. 2, an opening 11 is provided on the back surface, which is defined by the leading edge of each grip 6 a. Therefore, each of the grips 6a forms part of the upper, lower, left and right side surfaces and the rear surface of the door housing 1h. In this case, the opening 11
In order to dispose the inner panel 2 inside the inner panel 2, the respective parts are arranged such that a predetermined interval S is left between the peripheral edge of the inner panel 2 and the distal end edge of each of the gripping portions 6 a in a state where the inner panel 2 is disposed at the regular position. Select the dimensions of Further, at both ends of the distal end edges of the upper and lower grips 6a and 6c, positioning pieces 8a, 8b, 8c and 8d which are positioned with respect to the four corners of the inner panel 2 and which can be cut off are integrally formed. . As shown in FIG. 4, one positioning piece 8a (8b, 8c, 8d is basically the same) is formed in an L-shape to form a position regulating part 8as for regulating the position of the corner 2s of the inner panel 2. A pair of thin connecting portions 8a connecting the position restricting portion 8as and the grip portion 6a.
The connecting portions 8ac and 8ac can be easily detached from the gripping portions 6a by cutting the connecting portions 8ac and 8ac with a nipper or the like.

Reference numerals 4a, 4b, 4c, and 4d denote fitting members integrally formed in a block shape by using styrofoam. Each fitting member 4a can be fitted by inserting it into the grip portion 6a. In this case, the grip portions 6 of the fitting members 4a.
a ... and the portion in contact with the inner panel 2 are formed so as to be flat so as to make surface contact at all positions in the longitudinal direction so that the heat-insulating filler 5 described later does not leak, and the portion in contact with the back surface of the front portion of the outer panel 3 is It is formed as a plurality of projections 4s so as to be able to cope with the wraparound of the heat-insulating filler 5 and the curved surface formed on the peripheral edge of the outer panel 3. Each of the fitting members 4a... Is fitted to a regular position of the grip 6a to form a rectangular frame as a whole.
a ... exposed. Each of the exposed gripping portions 6a...
Are formed with engaging grooves 7a, 7b, 7c, 7d into which the engaging edges 2a... Formed in the inner panel 2 are inserted.

Next, a method of assembling the door 1 using such components will be described with reference to the drawings.

First, as shown in FIG.
Each of the fitting members 4a,.
Insert and fit. In this case, in the embodiment, first, the fitting members 4a and 4c located at the top and bottom are fitted, and then the fitting members 4b and 4d located at the left and right are fitted. As a result, as shown in FIG.
Are formed, and a part of the inside is exposed from the grip portions 6a.

Then, the exposed fitting members 4a.
The peripheral portion of the inner panel 2 is engaged. That is, as shown in FIG. 1, the engaging edges 2a provided on the peripheral edge of the inner panel 2 are inserted into the engaging grooves 7a provided on the fitting members 4a. As a result, the outer panel 3, the fitting members 4a, and the inner panel 2 are positioned with respect to each other, and in particular, the inner panel 2 is accurately positioned by the respective positioning pieces 8a that are integrally formed on the outer panel 3 side.

As described above, since the door housing 1h is constructed, in this state, the inner panel 2 and the outer panel 3 are pressed and fixed from both sides so as not to separate from each other. Insulation filler 5) is filled. The inner panel 2 is provided with small holes for filling the urethane foam.
As a result, when the urethane foam is solidified, the inner panel 2, the outer panel 3, and the fitting members 4a are adhered to the urethane foam to be integrated. Then, the connecting portions 8ac, 8ac of the positioning piece portions 8a are cut off with a nipper or the like, and as shown in FIG.
When s is released, a predetermined interval S is secured between the inner panel 2 and the outer panel 3 at all positions.

Next, as shown in FIGS. 1 and 2, a rubber seal packing 12 is adhered on the grip portions 6a along the peripheral edge of the inner panel 2, and furthermore, a lock mechanism 22 and a handle are provided. When the necessary accessories such as 23 are attached, the assembly of the door 1 is completed.

Such an opening / closing door 1 does not require a fixing device such as a screw, and it suffices to use a fitting member 4a made of styrene foam or the like instead of the conventional connecting member. (Assembly man-hours) can be significantly reduced, and further, recyclability can be improved. (Outer panel 3) is provided with a heat insulating space at a predetermined interval S between the inner panel 2 and the holding portions 6a (outer panel 3), so that the heat insulating property can be remarkably improved.

Although the embodiment has been described in detail, the present invention is not limited to such an embodiment, and does not depart from the gist of the present invention in the details of the configuration, shape, method, quantity, material, and the like. Can be arbitrarily changed, added, or deleted within the range.

For example, the inner panel 2 has an engaging edge 2a which is bent at a peripheral edge thereof, and a fitting member 4a.
... has an engagement groove portion 7a for inserting and positioning the engagement edge portion 2a. However, a wedge-shaped projection is formed on the peripheral edge of the inner panel 2, and this projection is connected to the fitting member 4a.
(Styrofoam) may be used.
The fitting members 4a are not limited to Styrofoam, and the heat-insulating filler 5 is not limited to urethane foam. On the other hand, the cooling cabinet M is illustrated as an application of the opening and closing door 1, but can be used for various products such as a heat storage cabinet and a temperature test tank configured similarly to the cooling cabinet M.

[0031]

As described above, in the opening / closing door of the refrigerator or the like according to the present invention, the outer peripheral portion of the outer panel is folded back to form a grip portion, and the inner panel is positioned on the grip portion. A cut-off positioning piece is integrally formed, and further, a heat insulating fitting member partially exposed from the grip portion is fitted inside the grip portion, and the peripheral edge portion of the inner panel is gripped by the grip portion. The door housing is formed at a predetermined distance from the door and is engaged with the exposed fitting member, and the door housing is filled with the heat-insulating filler, so that the following remarkable effects are obtained.

[0032] Fixtures such as screws are not required.
Since it is sufficient to use a fitting member formed of styrene foam or the like instead of the conventional coupling member, the cost of parts and the manufacturing cost (man-hours for assembling) can be significantly reduced, and additionally, the recyclability can be improved.

The inner panel and the outer panel are not directly connected by the connecting member, and a heat insulating space is provided at a predetermined interval between the inner panel and the holding portion (outer panel), so that the heat insulating property can be significantly improved.

Since the positioning of the inner panel is performed on the grip portion and the cut-off positioning piece is integrally formed, the positioning of the inner panel with respect to the outer panel can be performed accurately and reliably without impairing the heat insulating property.

According to a preferred embodiment, the outer panel, the inner panel and the inner panel can be provided by providing an engagement edge on the peripheral edge of the inner panel and an engagement groove for inserting and positioning the engagement edge on the fitting member. The positioning of the panel and the fitting member can be performed easily and accurately.

[Brief description of the drawings]

FIG. 1 is a horizontal cross-sectional view (A in FIG. 2) of an opening / closing door according to the present embodiment.
-A line section),

FIG. 2 is a rear view of the door,

FIG. 3 is an exploded configuration view including a partial cross section of the opening and closing door;

FIG. 4 is an enlarged enlarged view of a positioning piece portion of the opening / closing door,

FIG. 5 is an external front view of a cooling storage provided with the opening and closing door.

FIG. 6 is a partial cross-sectional plan view of the refrigerator,

FIG. 7 is a cross-sectional side view of the heat insulation tank in the same cooler (a cross section taken along line BB in FIG. 6);

FIG. 8 is a horizontal sectional view of a door according to the related art;

[Description of Signs] 1 Opening / closing door 1h Door housing 2 Inner panel 2a ... Engaging edge 3 Outer panel 4a ... Fitting member 5 Insulating filler 6a ... Grip 7a ... Engaging groove 8a ... Positioning piece S Predetermined interval M Cooler

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F25D 23/02 304 F25D 23/08

Claims (4)

(57) [Claims] A door housing comprising a combination of an inner panel and an outer panel, wherein the door housing is filled with a heat-insulating filler to open and close a cooling box or the like. And forming the inner panel on the grip portion, and integrally forming a cuttable positioning piece portion,
Further, a heat-insulating fitting member partially exposed from the grip portion is fitted inside the grip portion, and a peripheral portion of the inner panel is spaced apart from the grip portion by a predetermined distance. An opening / closing door for a refrigerator or the like, wherein the door housing is constituted by engaging with the exposed fitting member, and the door housing is filled with the heat insulating filler. 2. The method according to claim 1, wherein the inner panel has a bent engaging edge on a peripheral edge thereof, and the fitting member has an engaging groove for inserting and positioning the engaging edge. An opening / closing door for the cooling box or the like according to claim 1. 3. The door according to claim 1, wherein the fitting member uses styrene foam. 4. The door according to claim 1, wherein said heat-insulating filler is made of urethane foam.