JP3015632B2 - Cold storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of disposing a heat conduction box at intervals in an insulated box, and circulating cool air within this interval to indirectly cool a storage room in the heat conduction box. It relates to a cold storage.

[0002]

2. Description of the Related Art Conventionally, this kind of low-temperature storage is, as shown in, for example, Japanese Patent Application Laid-Open No. 2-279970 (F25D17 / 08), provided with a heat conduction box at intervals in an insulated box opened to the front. The heat conduction box is used as a storage room, and the evaporator and blower of the cooling unit are arranged in the space between the heat conduction box and the heat insulation box, and the cool air cooled by the evaporator is supplied to the blower. The storage chamber is indirectly cooled by forced circulation within the interval.

According to such a low-temperature storage, since the inside of the storage room is cooled by the upper, lower, left and right and rear wall surfaces of the heat conduction box, and there is no direct invasion of dry cold air into the storage room, drying in the storage room is suppressed. , Its humidity can be kept high.
Therefore, it was suitable for storing fresh foods and cooked dishes at a low temperature without drying.

[0004] In a hotel, a restaurant, or the like, a dish prepared in a kitchen is provided to a customer until the dish is prepared.
It is necessary to temporarily store in such a high humidity storage room. However, since the conventional low-temperature storage was opened only on the front side, it was necessary to take out and store cooked food from the same direction, and to provide food to customers and replenish food to the storage room smoothly. There was a problem that could not be done.

[0005] Therefore, the front and rear surfaces of the heat-insulating box are opened, and a heat conduction box which is opened at the front and rear with a space inside is provided. If a cold air passage is formed and forced air is circulated from above,
In addition to being able to indirectly cool the storage room in the heat conduction box from the upper, lower, left and right wall surfaces, the above-mentioned dishes and the like can be stored and replenished from one opening, and taken out from the other opening, The provision and replenishment of food becomes extremely smooth.

[0006]

When the front and rear surfaces of the heat-insulating box are opened, the rigidity of the heat-insulating box deteriorates, and there is a danger that the heat-insulating box may be distorted particularly when subjected to a lateral force. Therefore, as shown in FIG.
The rigidity of the heat-insulating box 100 is improved by integrally forming the partition wall 101 extending to the left and right at the center of the box. In this case, since the inside of the heat insulating box 100 is vertically divided, the heat insulating box 100
The upper and lower heat conduction boxes are respectively disposed above and below the partition wall 101, and the cold air passage between the upper and lower heat conduction box (not shown) and the heat insulation box 100 is also vertically disposed by the partition wall 101. Since the partition is divided, the evaporator and the blower of the cooling device must be provided above and below the partition wall 101, respectively.

[0007] When the upper and lower heat conduction boxes are to be indirectly cooled by the evaporator and the blower of one cooling device, it is necessary to form a duct that bypasses the partition wall 101 in the heat insulating box 100. However, the structure is complicated, the workability of assembly is deteriorated, and the manufacturing cost is also increased. Further, instead of the partition wall 101 as shown in FIG. 8, it is also conceivable to form a partition (a portion indicated by 101 A in FIG. 8) extending right and left integrally with the heat insulating box so as to partition only the opening of the heat insulating box. Also in this case, there is a restriction in inserting the upper and lower heat conduction boxes, and they must be assembled inside the heat insulating box, which also deteriorates the assembling workability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problems. In a so-called indirect cooling type low-temperature storage, articles can be delivered smoothly and assembly workability can be improved. It is an object of the present invention to secure the rigidity of the heat insulating box without impairing the structure.

Another object of the present invention is to improve the cooling performance of a low-temperature storage of an indirect cooling type having openings on the front and rear surfaces when heat storage boxes are arranged above and below to form storage rooms. To make it happen.

[0010]

That is, the low-temperature storage 1 according to the first aspect of the present invention comprises a heat insulating box 6 having openings 7 and 8 on the front and rear surfaces, and a front and rear opening 7 and 8 of the heat insulating box 6. A pair of reinforcing plates 51, 52 and a pair of reinforcing plates 51, 52 spanned between left and right side walls 6 </ b> C, 6 </ b> D at front and rear openings of the heat-insulating box 6, which are openably and closably closed, respectively. Support member 1 including rail 53 provided in the front-rear direction
4, an upper heat conduction box 21 having an opening in the front and rear surfaces, disposed on the support member 14 at an interval from the heat insulating box 6, and having an upper storage chamber 31 inside; A lower heat conduction box 22 which is disposed below the support member 14 with an interval from the heat insulating box body 6 and has an interior as a lower storage chamber 32; An outer peripheral cool air passage 39 formed at an interval between the heat insulating box 6 in the upper, lower, left and right directions, and an evaporator 33 and a blower 34 of a cooling device disposed in the outer peripheral cool air passage 39 above the upper heat conduction box 21. And the supporting member 1
Reference numeral 4 denotes a central cold air passage 40 communicating between the upper and lower heat conduction boxes 21 and 22 and communicating with the outer peripheral cold air passage 39.
The upper and lower storage chambers 31 and 32 are communicated with the outer peripheral cold air passages 39 on the sides of the first and second cooling air passages 39 and forcedly circulate the cool air cooled by the evaporator 33 into the two cold air passages 39 and 40 by the blower 34. The inside is cooled indirectly.

The low-temperature storage 1 according to the second aspect of the present invention
Insulating box 6 having openings 7 and 8 on the front and rear surfaces, doors 44 and 46 for opening and closing the front and rear openings 7 and 8 of the insulating box 6, respectively, and left and right side walls 6C and 6D of the insulating box 6 A support member 14 spanned between the support member 14 and an opening in the front and rear surfaces, is disposed on the support member 14 with an interval from the heat-insulating box 6, and has an upper storage chamber 31 inside. A lower heat conduction box 22 having a box 21, an opening in the front and rear surfaces, disposed below the support member 14 with an interval from the heat insulation box 6, and having a lower storage room 32 inside.
And an outer peripheral cold air passage 39 formed at an interval between the heat insulating box 6 on the upper, lower, left and right sides of the upper and lower heat conduction boxes 21 and 22.
And an evaporator 33 and a blower 34 of a cooling device disposed in an outer peripheral cold air passage 39 above the upper heat conduction box 21, and the support member 14 includes upper and lower heat conduction boxes 21 and 22.
A central cold air passage 40 communicating with the outer peripheral cold air passage 39
Is formed, and the outer peripheral portion cool air passage 39 on the side of the upper and lower heat conduction boxes 21 and 22 is communicated.
A barrier portion (flange) 53A for generating turbulence in the cool air flowing through the central cool air passage 40 is formed, and the cool air cooled by the evaporator 33 is cooled by the blower 34 into the cool air passages 39 and 40.
The inside of the upper and lower storage chambers 31 and 32 is indirectly cooled by forcibly circulating the air.

[0012]

According to the low-temperature storage according to the first aspect of the present invention, the door is provided.
Since the inside of the upper and lower storage chambers 31 and 32 is opened in the front-rear direction by opening the doors 4 and 46, articles can be stored from one side and taken out from the other side. Therefore, provision of articles such as cooked dishes and refilling of the upper and lower storage chambers 31 and 32 can be performed smoothly. In addition, the upper and lower storage rooms 31, 3
Since the inside of the container 2 is indirectly cooled from the upper, lower, left and right surfaces of the upper and lower heat conduction boxes 21 and 22 except for the front and rear openings, the foods such as dishes stored in the upper and lower storage chambers 31 and 32 are dried. And can be stored at a low temperature.

In particular, since the rigidity of the heat insulating box 6 is improved by the presence of the reinforcing plates 51 and 52 of the support member 14, distortion and the like do not occur even when a lateral force is applied.
Further, since the upper heat conduction box 21 is provided on the support member 14, when the upper heat conduction box 21 is inserted into the heat insulating box 6 from the opening 7 of the heat insulating box 6, the rail portion 53 is formed. It can be smoothly inserted along. Further, the support member 14
Since a central cold air passage 40 communicating with the outer peripheral cool air passage 39 is formed between the upper and lower heat conductive boxes 21 and 22, the outer peripheral cool air passage 39 on the side of the upper and lower heat conductive boxes 21 and 22 is communicated. Thus, smooth forced air circulation can be realized without providing a special duct or the like. In general, the workability of assembling the low-temperature storage 1 is significantly improved.

Further, according to the low temperature storage 1 of the present invention, the upper and lower storage chambers 3 are opened by opening the doors 44 and 46.
Since the insides of the first and second openings are opened in the front-rear direction, articles can be stored from one side and taken out from the other, and the provision of articles such as cooked dishes and the replenishment of the upper and lower storage chambers 31 and 32 can be performed smoothly. The upper and lower storage chambers 31 and 32 have upper and lower heat conduction boxes 21 and 2 other than the front and rear openings.
Since the food is cooled indirectly from the upper, lower, left and right surfaces of the food, the food such as food stored in the upper and lower storage chambers 31 and 32 can be favorably stored at a low temperature without drying.

Here, the cool air from the evaporator 33 provided in the outer peripheral cool air passage 39 above the upper heat conductive box 21 flows down the outer peripheral cool air passage 39 on the side of the upper heat conductive box 21. , A part of which flows into the central cold air passage 40, and the remaining part is the lower heat conduction box 22.
Will flow down to the outer peripheral cold air passage 39 on the side of
The cool air flowing into the central cool air passage 40 is supplied to the upper heat good conduction box 21.
Of the lower heat conduction box 22 is insufficiently cooled.

However, according to the second aspect of the present invention, the support member 14 is formed with the barrier portion (flange) 53A.
The cool air that has flowed into the central cool air passage 40 collides with the barrier portion (flange) 53 </ b> A, causing turbulence and also flowing to the lower heat good conduction box 22 side. Will be performed well.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of the low-temperature storage 1 of the present invention, FIG. 2 is a vertical front view of the low-temperature storage 1 of the present invention, FIG. 3 is a vertical side view of the low-temperature storage 1, and FIG. 5 is a longitudinal sectional front view of the heat insulating box 6, FIG. 6 is an exploded perspective view of the heat insulating box 6 and the support member 14, and FIG. The low-temperature storage 1 of the present invention is installed in, for example, a kitchen of a restaurant, and includes a heat insulating box 6 in which a heat insulating material 4 is filled between inner and outer boxes 2 and 3. As shown in FIG. 4, the heat-insulating box 6 has openings 7 and 8 at the front and rear, and one side of the top wall 6A projects upward to form an overhang 9, and the inside thereof extends downward. An open cooling chamber 11 is configured. The front and rear openings 7 and 8 of the heat insulating box 6 are vertically divided by partition members 12 and 13, respectively.
A support member 14 extends between the left and right side walls 6C and 6D of the heat insulating box 6 between the three.

The support member 14 comprises a pair of relatively thick steel plate reinforcing plates 51 and 52 as shown in FIG. 7 and steel plate rails 53. The reinforcing plates 51 and 52 are long steel plates having a length extending between the left and right side walls 6C and 6D of the heat insulating box 6 and a predetermined width (up and down), and the openings 7 and 8 of the heat insulating box 6 are provided.
Both ends are fixed to the left and right side walls 6C and 6D on the slightly inner side. Thereby, the rigidity of the heat-insulating box 6 with respect to the acting force from the lateral direction is improved. In addition, rail part 53
Are screwed at predetermined intervals from each other across the upper edges of the reinforcing plates 51, 52, and the rail portions 53, 53 located at the left and right ends and the left and right ends of the reinforcing plates 51, 52 Are formed with predetermined intervals 24, 24. A flange 53A is formed on the left edge of each rail 53 as a barrier bent downward.

Inside the heat insulating box 6, upper and lower heat conductive boxes 21 and 22 formed of a heat conductive material such as stainless steel and opened to the front and rear are provided at predetermined intervals with the inner surface of the heat insulating box 6, respectively. It is stored and arranged above and below. At this time, the lower heat conduction box 22 is fixed below the support member 14 on the mounting plate 23 provided on the upper surface of the bottom wall 6B of the heat insulating box 6 with an interval from the bottom wall 6B. The upper heat conduction box 21 is a support member 1
4 is fixed on the rail 53. by this,
An interval corresponding to the width of the reinforcing plates 51 and 52 is formed between the upper and lower heat conduction boxes 21 and 22. In addition, the upper and lower heat conduction box 21,
The front and rear opening edges of 22 are the inner surface of the heat insulating box 6 or the partition member 1.
Abut on 2, 13 directly or via another plate,
Thus, the upper and lower heat conduction boxes 21 and 22 are separated from the space between the heat insulating box 6 and the space between the upper and lower heat conduction boxes 21 and 22, and are open to the front and rear.
32 are configured.

In each of the storage rooms 31 and 32, a plurality of shelves 56 for placing articles are erected, and the upper and lower heat conduction boxes 2 are provided.
Duct plate 5 with an interval from the upper surface and left and right side surfaces of 1, 22
7 is attached. Then, the duct plates 57, 57
Auxiliary blowers 58, 58 for agitating the air are provided between the upper and lower heat conduction boxes 21, 22, and thereby, the upper and lower storage chambers 3 are provided.
The air in 1 and 32 is agitated so that temperature unevenness does not occur.

On the other hand, an evaporator 33 constituting a cooling device and a blower 34 are housed and arranged in the cooling chamber 11, and are mounted on the top wall 6A of the heat insulating box 6 on the side of the overhang portion 9. Similarly, a compressor 36, a condenser 37, and a condenser blower 38 which constitute a cooling device are provided.

The spaces 24, 24 are formed between the left and right ends of the reinforcing plates 51, 52 of the support member 14 and the rail portion 53 as described above, whereby the left and right side walls 6C, 6 of the heat insulating box 6 are formed.
D and the rails 53, 53 communicate vertically. Since the mounting plate 23 is provided with through holes 23A, a series of outer peripheral cold air passages 39 including the cooling chamber 11 are provided between the upper and lower heat conduction boxes 21 and 22 and the heat insulating box 6. Is configured. Also, since there is a space between the upper and lower heat conduction boxes 21 and 22 for the width of the reinforcing plates 51 and 52 as described above, the central cold air passage communicating with the outer peripheral cool air passage 39 on the left and right within this space. 40 are configured. The flange 53A of the rail portion 53 projects downward from above toward the center cold air passage 40, and the left end of the upper surface of the lower heat conduction box 22 has a left side of the center cold air passage 40. A wind direction plate 61 protruding in a direction to narrow the opening is attached.

Further, below the side wall of the overhang portion 9 on the side of the condenser 37, the cool air passage 39 and the evaporator above the upper heat conduction box 21 in the range from the front end of the heat insulating box 6 to the rear edge of the evaporator 33. Table 33
A cover 41 for closing the rear surface is attached. Further, a space communicating with the cool air passage 39 is formed above the evaporator 33, and the blower 34 is arranged below the evaporator 33. With this arrangement, the blower 34 is located above and to the left of the upper heat conduction box 21, and the blowout side of the blower 34 (the upper left corner of the upper heat conduction box 21) is used as the outlet 42, and The upper right corner of the box 21 is a suction port 43. Therefore, the cover 41 is in the form of partitioning the outlet 42 and the inlet 43.

The front and rear openings 7 and 8 of the heat insulating box 6 are respectively closed openably and closably by, for example, double door type heat insulating doors 44... 44. The procedure will be described. First, FIG.
The front and rear openings 7, 8 of the heat insulating box 6 opened front and rear as shown in FIG.
The reinforcing plates 51 and 52 of the support member 14 are screwed and fixed to the portions as described above. Then, the rails 53 are screwed between the reinforcing plates 51 and 52 as described above to complete the support member 14. Next, the upper heat conduction box 21 is inserted into the heat insulating box 6 from the opening 7 side. At this time, the lower surface of the upper heat conduction box 21 is brought into contact with the rail 53 so that the rail 5
Insert while sliding along 3. Thereby, even when the upper heat good conduction box 21 is heavy, it can be easily installed in the heat insulation box 6.

Thereafter (or before), the lower heat conduction box 2
2 is inserted into the heat insulating box 6 and fixed on the mounting plate 23.
Next, the partition members 12 and 13 are attached across the left and right side walls 6C and 6D of the heat insulating box 6 so as to correspond to the front and rear of the reinforcing plates 51 and 52, respectively.

The low-temperature storage 1 thus assembled
Is installed between the kitchen and the customer seat, the front opening 7 is on the kitchen side, and the rear opening 8 is on the customer side. When the compressor 36 and the blowers 34, 34 of the cooling device are operated, the cool air cooled by the evaporator 33 is supplied to the blowers 34, 34.
, And is blown downward from the outlet 42. The cool air blown out from the outlet 42 is shown in FIG.
As shown by the middle arrow, the outer peripheral cold air passage 3 on the right side of the upper heat conduction box 21
9 flows down there, and then a part of the cool air passes through the space 24 and directly flows into the cool air passage 39 on the left side of the lower heat conduction box 22 while the remaining cool air flows through the upper and lower heat conduction passages. The air flows into the central cold air passage 40 between the boxes 21 and 22 from the left opening.

A cool air passage 3 on the outer periphery on the left side of the lower heat conduction box 22
9 flows into the outer peripheral cold air passage 39 below the lower heat conduction box 22, and then passes through the through holes 23A, 23A to the right outer peripheral cold air passage 39 of the lower heat conduction box 22. Inflow. The cool air flowing into the outer peripheral cold air passage 39 on the right side of the lower heat conduction box 22 rises there and flows into the outer peripheral cold air passage 39 on the right side of the upper heat conduction box 21 from the space 24. Then, it merges with the cool air that has passed through the central cold air passage 40 between the upper and lower heat conduction boxes 21 and 22, rises in the outer peripheral cold air passage 39 on the right side of the upper heat conduction box 21, and It flows into the outer peripheral cold air passage 39 above the upper heat conduction box 21.

The outer peripheral cold air passage 39 above the upper heat guide box 21
Flows into the cooling chamber 11 behind the evaporator 33 and returns to the evaporator 33 from above the evaporator 33. By such a series of forced cooling air circulation, the cooling air from the evaporator 33 cools substantially the entire area of the upper, lower, left and right surfaces of the upper and lower heat conduction boxes 21 and 22. Therefore, the upper and lower storage chambers 31 and 32
The upper and lower heat conduction boxes 21 and 22 are cooled by the upper, lower, left and right walls.

Here, the cool air flowing down the outer peripheral cool air passage 39 on the right side of the upper heat good conduction box 21 and flowing into the central cool air passage 40 flows along the outer surface of the upper heat good conduction box 21. After flowing into the central cold air passage 40, the cold air continues to flow along the lower surface of the upper heat conduction box 21. Therefore, the upper surface of the lower heat conduction box 22 is not cooled as it is.

However, in the present invention, since the flange 53A of the rail portion 53 projects at a predetermined interval into the central cold air passage 40, it serves as a barrier for the cool air flowing along the lower surface of the upper heat conduction box 21. Therefore, the cool air flowing through the central cool air passage 40 collides with the flange 53A as shown in FIG. 2 and moves downward, collides with the upper surface of the lower heat conduction box 22, moves upward again, and collides again with the flange 53A. Become like
That is, since turbulence is generated in the cool air flowing through the central cool air passage 40, the cool air comes into contact with the upper surface of the lower heat good conduction box 22, and thereby, the lower heat good conduction box 22 is also vertically and horizontally. It becomes uniform and sufficiently cooled from each wall surface.

When the flow area of the central cool air passage 40 is larger than that of the outer peripheral cool air passage 39,
Most of the cool air flowing down the right side of the upper heat guide box 21 flows into the central cool air passage 40 and does not go toward the lower heat guide box 22. However, in the embodiment, the wind direction plate 61 is provided to Since the cool air flowing into the unit cool air passage 40 is restricted, such inconvenience can be solved.

In the upper and lower storage chambers 31, 32, dishes cooked in the kitchen are stored through the front opening 7 with the door 44 opened. The prepared dishes are stored in the upper and lower storage rooms 31,
32, the waiter opens the door 46 after receiving an order, or in accordance with the progress of a banquet, etc., and takes out the food from the opening 8 on the rear surface and provides the food to the customer. In addition, since the replenishment of the taken out food can be similarly performed from the opening 7 on the opposite side, storage, provision, and replenishment of the food can be performed extremely smoothly.

At this time, since the cold air does not flow directly into the upper and lower storage chambers 31 and 32 and is indirectly cooled from the upper, lower, left and right wall surfaces as described above, the cooling air is stored in the upper and lower storage chambers 31 and 32. The dishes are stored cold without drying. Therefore, the food can be stored in a delicious state without being wrapped in a wrap or the like. Further, in the embodiment, an overhang portion 9 is formed on the top wall 6A of the heat insulating box 6, and the overhang portion 9 is formed.
Since the cooling chamber 11 in which the evaporator 33 is disposed is configured,
Evaporator 3 without reducing the volume of upper and lower storage chambers 31 and 32
3 and a blower 34 can be provided.

[0034]

According to the first aspect of the present invention, as described above, the storage chamber is opened in the front-rear direction by opening the door, so that articles can be stored from one side and taken out from the other side. Therefore, provision of food such as cooked food and storage in the storage room can be performed extremely smoothly. In addition, since the storage room is indirectly cooled from the upper, lower, left and right surfaces of the heat conduction box except for the front and rear openings, foods such as dishes stored in the storage room can be stored at a low temperature without drying. become.

In particular, since the rigidity of the heat-insulating box is improved by the presence of the reinforcing plate of the support member, no distortion or the like occurs even when a lateral force is applied. Further, since the upper heat conduction box is provided on the support member, when the upper heat conduction box is inserted into the heat insulation box through the opening of the heat insulation box, it can be smoothly inserted along the rail portion. As well as being able to
The supporting member forms a central cold air passage communicating with the outer peripheral cold air passage between the upper and lower heat conducting boxes, and also communicates with the outer peripheral cold air passage beside the upper and lower heat conducting boxes, so that a special duct or the like is formed. The smooth cold forced circulation can be realized without the provision, and as a whole, the workability of assembling the low-temperature storage can be significantly improved.

According to the second aspect of the present invention, since the upper and lower storage chambers are opened in the front-rear direction by opening the door, articles can be stored from one side and taken out from the other side, and cooked dishes and the like can be taken out. Supply and replenishment to the upper and lower storage rooms can be performed smoothly, and the upper and lower storage rooms are indirectly cooled from the upper, lower, left and right surfaces of the upper and lower heat conduction boxes except for the front and rear openings. Therefore, foods such as dishes stored in the upper and lower storage chambers can be favorably stored at a low temperature without drying.

In particular, in the present invention, a barrier is formed in the support member, and the cool air flowing into the central cold air passage collides with the barrier to generate a turbulent flow, so that the cool air flows also to the lower heat conduction box side. Therefore, the upper surface of the lower heat conduction box is sufficiently cooled. As a whole, the upper and lower heat conduction boxes are uniformly cooled from the upper, lower, left and right wall surfaces, whereby the upper and lower storage chambers can be indirectly and satisfactorily indirectly cooled.

[Brief description of the drawings]

FIG. 1 is a perspective view of a low-temperature storage according to the present invention.

FIG. 2 is a vertical sectional front view of the low-temperature storage of the present invention.

FIG. 3 is a vertical side view of the low-temperature storage according to the present invention.

FIG. 4 is a perspective view of a heat insulating box of the low-temperature storage according to the present invention.

FIG. 5 is a vertical sectional front view of the heat insulating box of the low-temperature storage of the present invention.

FIG. 6 is an exploded perspective view of a heat insulating box and a support member of the low-temperature storage according to the present invention.

FIG. 7 is a perspective view of a support member of the low-temperature storage of the present invention.

FIG. 8 is a perspective view of a heat insulating box of a conventional low-temperature storage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature storage 6 Heat insulation box 7 Opening 8 Opening 14 Support member 21 Upper heat conduction box 22 Lower heat conduction box 31 Upper storage room 32 Lower storage room 33 Evaporator 34 Blower 39 Outer peripheral cold air passage 40 Central cold air passage 44 Door 46 Door 51 Reinforcement plate 52 Reinforcement plate 53 Rail 53A Flange

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-279970 (JP, A) JP-A-2-55069 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) F25D 17/08 311 F25D 23/02

Claims (2)

(57) [Claims] 1. A heat insulating box having an opening on front and rear surfaces, and a door for closing the front and rear opening of the heat insulating box so as to be openable and closable, respectively.
A support member including a pair of reinforcing plates erected between left and right side walls and a rail portion provided in the front-rear direction between the two reinforcing plates at the front and rear openings of the heat-insulating box, and an opening on the front and rear surfaces. An upper heat conduction box disposed on the support member at an interval from the heat insulating box and having an interior as an upper storage room; A lower heat conduction box disposed below the support member and having an interior as a lower storage room; and an outer peripheral cold air formed at a distance between the heat insulation box on the upper, lower, left and right sides of the upper and lower heat conduction boxes. A passage, and an evaporator and a blower of a cooling device disposed in the outer peripheral portion cool air passage above the upper heat conduction box, wherein the supporting member is provided between the upper and lower heat conduction boxes. Forming a central cold air passage communicating with the lower cold air passage, wherein the outer periphery on the side of the upper and lower heat conduction box is formed; Communicated with the cold air passage, by forced circulation to both cool air passage by the cooled cold air the blower at the evaporator, low-temperature storage, characterized by indirectly cooling the upper and lower storage compartment. 2. A heat insulating box having an opening in front and rear surfaces, and a door for closing the front and rear opening of the heat insulating box so as to be openable and closable, respectively.
A support member erected between the left and right side walls of the heat insulating box, and an opening in the front and rear surfaces, disposed on the support member with an interval from the heat insulating box, the interior is an upper storage room. An upper heat conduction box, having an opening in the front and rear surfaces, disposed below the support member with an interval from the heat insulation box, and a lower heat conduction box having an inside as a lower storage room, An outer peripheral cold air passage formed at a distance from the heat insulating box at the upper, lower, left and right sides of the upper and lower heat conduction boxes, and evaporation of a cooling device disposed in the outer peripheral cold air passage above the upper heat conduction box. And a blower, wherein the supporting member forms a central cold air passage communicating with the outer peripheral cold air passage between the upper and lower heat conduction boxes, and the outer periphery on the side of the upper and lower heat conduction box. The cool air flowing through the central cool air passage generates turbulence in the support member. Is to form a barrier portion, said by forced circulation to both cool air passage by the blower cooled cold air in the evaporator, low-temperature storage, characterized by indirectly cooling the upper and lower storage compartment.