JPH071143B2 - Cold storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention has a heat-conducting box fixedly installed inside a heat-insulating box at a distance from the box, and heat-conducting by forced circulation air. The present invention relates to a cold storage that cools a box and indirectly cools a storage chamber defined inside the heat conducting box.

(B) Conventional Technology As a conventional technology, Japanese Utility Model Application Laid-Open No. 63-194283 discloses a storage chamber covered with a casing made of a heat insulating material and a door body made of a heat insulating material, and a casing and a predetermined housing in the storage chamber. A vertical partition plate for partitioning the space between the casing and the storage box on the back or side of the storage box, and the partition plate. A horizontal partition plate connected to partition the space between the ceiling and the storage box forms a double air passage, and the evaporator of the refrigeration cycle is arranged on the casing side of the double air passage, and a blower is installed. Disclosed is a fresh food storage device mounted so that air in an air passage on the side of a storage box is blown to an evaporator.

(C) Problems to be Solved by the Invention According to the storage device of the related art, the circulating cold air first cools the bottom surface of the storage box and then cools both side surfaces and the rear surface of the storage box. . However, due to the layout of the blower, the cold air that has entered between the back of the storage box and the vertical partition plate wraps around the back of the storage box while it goes up toward the side of the storage box, There was a problem that the back part could not be cooled sufficiently.

In view of such a problem, the present invention provides a low-temperature storage that uniformly cools each surface of the heat conducting box to improve cooling performance and uniform temperature distribution.

(D) Means for Solving the Problem In order to solve the above-mentioned problems, the present invention is inserted into the inside of the heat insulating box through the front opening of the heat insulating box and has a good thermal property with a space from the heat insulating box. A guide box is fixedly equipped, and the inside of the heat-conducting box is used as a storage chamber, and in the space between the heat-insulating box body and the heat-conducting box,
In a low-temperature storage that is provided with a cooling unit such as an evaporator and a blower for circulating cold air, and is configured to indirectly cool the storage chamber by forcibly circulating cold air in the space, a rear wall of the heat insulating box and heat transfer A vertical partition plate is disposed between the rear plate of the box and a discharge cold air passage and a return cold air passage are formed, and the vertical partition plate has a heat conducting box side surface parallel to the vertical direction. Extended,
The low temperature storage is provided with a pair of rear guide plates having elasticity whose opening dimension is wider than the width of the heat conducting box and whose intermediate portion is narrower than the width of the heat conducting box.

(E) Operation According to the present invention, when the heat conducting box is cooled by the circulating cold air, the air in the storage chamber is indirectly cooled via the heat conducting box. At this time, the cold air that has entered between the rear plate and the vertical partition plate of the heat-conducting box is rectified by the action of the pair of rear guide plates, and does not circulate in the direction of the side plate of the heat-conducting box. Cool the rear plate of the guide box.

Further, the action of the pair of rear guide plates facilitates the positioning work when inserting the heat-conducting box into the heat-insulating box body. Since the rear side surface of the guide box is pressed and sandwiched, it is possible to prevent looseness of the heat-conducting box.

(F) Example A low temperature storage of the present invention will be described below with reference to FIGS. 1 to 7. Reference numeral 1 denotes a heat-insulating box body having an opening / closing door 2 at the front opening, and the heat-insulating box body 1 is configured by filling a heat insulating material between both inner and outer boxes. Inside this heat-insulating box body 1, a stainless steel upper heat conducting box 3 and a top plate 4A, which are open at the front and are composed of a top plate 3A, both side plates 3B3C, a rear plate 3D and a bottom plate 3E, both side plates.
A lower heat conducting box 4 made of stainless steel and having an opening in the front side, which is composed of 4B, 4C, a rear plate 4D and a bottom plate 4E, is fixedly attached to the inner wall surface of the heat insulating box 1 with a space therebetween, and is formed by this. The space serves as a cold air passage 5, and the inside defined by the upper heat conducting box 3 and the lower heat conducting box 4 serves as an upper storage chamber 6 and a lower storage chamber 7 for storing stored foods, respectively.

Also, the top wall of the heat insulating box 1 and the upper heat conducting box 3 facing it
In the cool air passage 5 between the top plates 3A of the above, the refrigeration system evaporator 11 covered with the unit cover 10 having the blowout port 8 in the front part and the suction port 9 in the rear part and the blowout port 8 in front of the evaporator 11 are covered.
A blower 12 for circulating cold air is arranged so as to face the above. Evaporator
Reference numeral 11 is connected to an electric compressor 13 and a condenser 14 mounted on the top wall of the box 1 to form a refrigeration cycle. Reference numeral 15 is a condenser air cooling fan.

Then, in the cold air passage 5 between the rear wall of the heat insulating box 1 and the rear plates 3D and 4D of the upper and lower heat conducting boxes 3 and 4 which face the heat insulating box 1, fixed to the rear portions of both side walls of the heat insulating box 1. Vertical partition plate fixed to L-shaped bracket 16
A discharge cold air passage 5A and a return cool air passage 5B are formed by arranging 17 and both passages communicate with each other through a lower communication port 18. Also,
In the cold air passage 5 between the bottom plate 3E of the upper heat conducting box 3 and the top plate 4A of the lower heat conducting box 4, a plurality of communication ports 19 are formed in the front part,
A part of the cold air that has cooled both side plates 3B and 3C of the upper heat conducting box 3 and the rear plate 3D at both end portions and the rear end portion of both side plates of the lower heat conducting box 4.
Bypass ports 20 and 21 that allow passage in the direction of 4B4C and rear plate 4D
And a horizontal partition plate 23 in the horizontal direction on which 22 and 22 are formed. In this horizontal partition plate 23, a front end flange 23A is placed and fixed on a U-shaped angle 24 passed between the side walls of the heat insulating box 1, and a support flange 17A protruding inward from the vertical partition plate 17 is provided.
The rear end is placed and fixed on.

The heat conducting box of the vertical partition plate 17 fixedly arranged as described above
The surfaces on the 3 and 4 sides extend in parallel in the vertical direction, and the opening dimension B is wider than the width dimension A of the good heat conducting boxes 3 and 4, and the dimension C between the middle portions is the good heat conducting box 3 A pair of rear guide plates 25 having elasticity narrower than the width dimension A of 4 and 4 are fixed.

Further, on the horizontal partition plate 23, as shown in a perspective view in FIG. 4, a plurality of supporting members for supporting the upper heat conducting box 3 at intervals above the horizontal partition plate 23. Is fixed. This support member is fixed to a pair of left and right upper side guide rails 26 that are fixed along the insertion direction of the upper heat conducting box 3, that is, along the side wall of the heat insulating box 1, and at a space inside thereof. , A pair of upper box support brackets extending parallel to the upper side guide rails 26
27 and three upper box back support fittings 28 fixed along the vertical partition plate 17. Then, the upper side guide rail 26 has a mounting surface 26A and a guide surface 26B, a large number of cold air passage ports 29 are formed in the rising surface 26C, and the upper box support fitting 27 has a mounting surface 27A. A large number of cold air passage ports 30 are formed on the rising surface 27B.

Thus, the upper heat conducting box 3 has the mounting surfaces 26 of these supporting members.
It will be stably supported by A, 27A and 28A.

On the other hand, on the bottom wall of the heat insulating box 1, as shown in the perspective view of FIG. 5, in order to support the lower heat conducting box 4 above the bottom wall of the heat insulating box 1 with a space. A plurality of supporting members are fixed. This support member is inserted in the lower heat conducting box 4, that is,
A pair of left and right lower side guide rails 31 fixed along the side wall of the heat insulating box 1, and fixed inside the left side guide rails 31 at intervals.
It is configured by a pair of lower box support fittings 32 extending in parallel with the lower side guide rails 31 and three lower box back support fittings 33 fixed along the vertical partition plate 17. The lower side guide rail 31 has a mounting surface 31A and a guide surface 31B, a large number of cold air passage ports 34 are formed on the rising surface 31C, and the lower box support fitting 32 has a mounting surface 32A. Further, between the lower side guide rail 31 and the lower box support fitting 32, a pair of wind direction plates 35 for guiding the circulating cold air to the front is arranged.

Thus, the lower heat conducting box 4 has the mounting surfaces 31A, 31A,
It will be stably supported by 32A and 33A.

Next, a method of fixing the heat conducting boxes 3 and 4 will be described. First, as shown in FIG. 6, the upper heat conducting box 3 in which a heat insulating sheet 36 such as foamed polyethylene is attached to the surface of the top plate 3A on the side of the cold air passage 5 is opened from the front opening of the heat insulating box 1 as shown in FIG. Insert in 1. At this time, the bottom plate 3E of the upper heat conducting box 3 slides on the mounting surfaces 26A of the pair of left and right upper side guide rails 26 and the mounting surface 27A of the upper box supporting metal fitting 27, and the side plate 3B of the heat conducting box 3 moves. Since 3 and 3C are guided by the guide surface 26B of the upper side guide rail 26, the work of inserting the good heat conducting box 3 can be performed very easily.

Then, when the heat conducting box 3 is inserted between the rear guide plates 25 having a frontage dimension B wider than the width dimension A of the heat conducting box 3, the dimension C between the intermediate portions becomes the width dimension of the heat conducting box 3. The rear guide plate 25 narrower than A is spread by the side plates 3B and 3C of the heat conducting box 3. As a result, the side plates 3B, 3C of the good heat conducting box 3 are pressed and pinched by the elastic action of the guide plate 25, and the good heat conducting box 3 is formed.
It is possible to reliably prevent left and right backlash.

On the other hand, the outward-facing front flange 3F formed on the front opening peripheral edge of the upper heat conducting box 3 is provided on the inner peripheral edge of the opening of the heat insulating box 1,
When the fixing flange 37 fixed in the same plane as the front surface of the U-shaped angle 24 comes into contact with the fixing flange 37, the insertion of the heat conducting box 3 is restricted, and in this state, the front flange 3F is inserted through a packing (not shown). It is hermetically screwed to the fixing flange 37 to complete the fixing of the upper heat conducting box 3.

Similarly, the lower heat conducting box 4 is inserted into the box body 1 through the front opening of the heat insulating box body 1. At this time, the bottom plate 4E of the lower heat conducting box 4 is mounted on the mounting surface 31 of the pair of left and right lower side guide rails 31.
Sliding on the mounting surface 32A of A and the lower box support metal fitting 32, the heat conducting box 4
Side plates 4B and 4C are the guide surface 31B of the lower side guide rail 31.
Therefore, the work of inserting the heat conducting box 4 can be performed very easily.

When the heat conducting box 4 is inserted between the rear guide plates 25 having a frontage dimension B wider than the width dimension A of the heat conducting box 4, the dimension C between the intermediate portions is the width dimension of the heat conducting box 4. The rear guide plate 25 narrower than A is spread by the side plates 4B and 4C of the heat conducting box 4. As a result, the side plates 4B, 4C of the good heat conducting box 4 are pressed and pinched by the elastic action of the guide plate 25, and the good heat conducting box 4 is provided.
It is possible to reliably prevent left and right backlash.

On the other hand, when the outward facing front flange 4F formed on the front opening peripheral edge of the lower heat conducting box 4 abuts on the fixing flange 37, the insertion of the heat conducting box 4 is restricted, and in this state, the front flange
4F is hermetically screwed to the fixing flange 37 via a packing (not shown), and the fixing of the lower heat conducting box 4 is completed.

Then, when the upper and lower heat conducting boxes 3 and 4 are fixedly installed inside the heat insulating box 1, the angle between the side walls of the heat insulating box 1 is 24.
The front surface of the abutment is fixed to the middle partition column 38. After that, the opening / closing door 2 that closes the front opening of the heat-insulating box body 1 facing the upper and lower heat conducting boxes 3 and 4 is attached.

In the above configuration, the cold air that has undergone heat exchange in the evaporator 11 is
It is discharged from the outlet 8 to the cool air passage 5 by the blower 12 and circulated in the route shown by the arrow in FIGS. 1 and 2, and first, the top plate 3A of the upper heat conducting box 3 is cooled via the heat insulating sheet 36. After that, the both side plates 3B, 3C and the rear plate 3D are cooled, and at this time, the cool air flowing into the discharge cold air passage 5A corresponding to the rear plate 3D is rectified by the action of the pair of left and right rear guide plates 25. Since the rear guide plate 25 presses and sandwiches the side plates 3B and 3C of the upper heat conducting box 3, cold air does not circulate in the direction of the side plates 3B and 3C, and the rear plate 3D of the high heat conducting box 3 is securely held. Cooling.

Thus, the cold air flowing downward along the side plates 3B and 3C of the upper heat conducting box 3 is the rising surface 26C of the upper side guide rail 26.
The bottom plate 3E of the upper heat conducting box 3 through the cold air passage 29 formed in
Flows into the cold air passage 5 between the horizontal partition plate 23 and the horizontal partition plate 23, where it joins the cool air flowing downward along the rear plate 3D of the upper heat conducting box 3 to cool the bottom plate 3E of the upper heat conducting box 3.

On the other hand, part of the cool air flowing downward along the side plates 3B, 3C and the rear plate 3D of the upper heat conducting box 3 passes straight through the bypass ports 20, 21, 22 formed in the horizontal partition plate 23, After cooling the bottom plate 3E, this cold air flows between the horizontal partition plate 23 and the top plate 4A of the lower heat conducting box 4 through the communication port 19 formed in the front part of the horizontal partition plate 23, and After cooling the plate 4A, it joins with the cool air to cool the side plates 4B, 4C and the rear plate 4D of the lower heat conducting box 4. On this occasion,
The cool air flowing into the discharge cold air passage 5A corresponding to the rear plate 4D is rectified by the action of the pair of left and right rear guide plates 25 in the same manner as described above, and further, the rear guide plate 25 is the side plate 4B of the lower heat conducting box 4. , 4C are pressed and sandwiched, cold air does not circulate in the direction of the side plates 4B, 4C, and the rear plate 4D of the lower heat conducting box 4 is reliably cooled.

In this way, the reason why a part of the cold air passes straight through the bypass ports 20, 21, 22 is that the side plates 3B, 3C and the rear plate 3 of the upper heat conduction box 3 are connected.
All of the cool air flowing downward along D is flown along the bottom plate 3E of the upper heat conducting box 3, and after cooling the bottom plate 3E, the bottom plate 4E of the lower heat conducting box 4 is cooled through the communication port 19. This is because the cooling of the side plates 4B, 4C and the rear plate 4D of the lower heat conducting box 4 becomes extremely weak.

Thus, the cold air flowing downward along the side plates 4B and 4C of the lower heat conducting box 4 is the rising surface 31C of the lower side guide rail 31.
Bottom plate 4E of the lower heat conducting box 4 through the cold air passage 34 formed in
And to the cold air passage 5 between the bottom wall of the heat insulating box 1. This cold air is not drawn toward the lower communication port 18 by the action of the wind direction plate 35 and the lower support metal fitting 32, and the bottom plate of the lower heat conducting box 4
After wrapping around in the front direction of 4E and cooling the bottom plate 4E of the lower heat conducting box 4, it passes between the pair of lower support fittings 32, returns from the lower communication port 18 and passes through the cold air passage 5B, and from the suction port 9, It is returned to the evaporator 11 again.

By the cold air circulation operation described above, the upper and lower heat conducting boxes
By cooling 3 and 4, the air in the upper storage chamber 6 and the lower storage chamber 7 is indirectly cooled via the upper and lower heat conducting boxes 3 and 4.

Although the present invention has been described with respect to the embodiment in which the upper and lower heat-conducting chambers are formed by partitioning the upper and lower heat-conducting boxes, the single heat-conducting box is used as a single storage chamber. It can also be applied to compartmentalized cold storage.

(G) Effect of the Invention As described above, according to the present invention, a vertical partition plate is provided between the rear wall of the heat insulating box and the rear plate of the heat conducting box to form the discharge cool air passage and the return cool air passage. Formed on the surface of the vertical partition plate on the side of the good heat conducting box, extending in parallel in the vertical direction, the frontage dimension is wider than the width dimension of the good heat conducting box, and the dimension between the middle parts is good heat conducting. Since a pair of rear guide plates having elasticity narrower than the width of the box is provided, the cold air flowing between the rear plate of the heat conducting box and the vertical partition plate is rectified by the action of the pair of rear guide plates and The rear plate of the heat conducting box can be surely cooled without wrapping around in the side plate direction of the good conducting box, and insufficient cooling of the rear plate can be eliminated.

Moreover, due to the action of the pair of rear guide plates, the positioning work when inserting the heat-conducting box inside the heat-insulating box becomes easy, and the elastic action of the guide plate in the predetermined insertion state causes the heat-conducting box to move. Since the rear side surface is pressed and sandwiched, a great effect such as the prevention of left and right backlash of the heat conducting box can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a cold storage of the present invention, FIG. 2 is a vertical sectional front view thereof, FIG. 3 is a transverse plan view thereof, and FIGS. 4 and 5 are perspective views of essential portions of the present invention. FIG. 6 is a vertical sectional side view showing a state where the heat conducting box is being inserted, and FIG. 7 is a transverse plan view of the same. 1 ... Insulation box, 3,4 ... Heat conduction box, 3D, 4D ... Rear plate, 5A
...... Discharged cold air passage, 5B ...... Returned cold air passage, 17 …… Vertical partition plate, 25 …… Rear guide plate.

Claims (1)

[Claims] 1. A heat-conducting box which is inserted into the inside of the box from the front opening of the heat-insulating box and is fixedly provided at a distance from the heat-insulating box, and the inside of the heat-conducting box is stored. In addition to the chamber, a cooling unit such as an evaporator and a blower for circulating cold air is provided in the space between the heat-insulating box and the heat-conducting box, and cold air is forcedly circulated in the space to indirectly cool the storage chamber. In the low temperature storage configured as described above, a vertical partition plate is provided between the rear wall of the heat insulating box and the rear plate of the heat conducting box to form a discharge cold air passage and a return cold air passage, On the surface of the partition plate on the heat conducting box side,
A pair of rear guide plates having elasticity that extend parallel to the up-down direction and have a frontage dimension wider than the width of the good heat conduction box and a dimension between the intermediate portions that is narrower than the width of the good heat conduction box are provided. A low temperature storage characterized by that.