JPH0445010Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a show case, and more particularly to a refrigerating type open show case equipped with a mechanism for circulating air cooled by a cooling device.

[Prior Art] Conventional open-shoulder cases include a case that has a top wall, a back wall, a bottom wall, and a side wall and has an opening in the front, and a case that has an opening on the front surface. first and second air passages extending independently along the bottom wall and opening at the upper and lower edges of the opening, respectively; and an evaporator disposed within the first air passage. The first air passage and the second air passage are arranged in a row in the left-right direction of the back wall at least in the back wall, and the first air passage is arranged in a row in the left-right direction of the back wall, and An open-show case is known in which the upper and lower edges of the case are opened on the inside of the case rather than the second air passage (see, for example, Japanese Utility Model Publication No. 10853/1983).

In addition to this, the case has a top wall, a back wall, a bottom wall, and a side wall and has an opening in the front, and a case that extends across the top wall, back wall, and bottom wall. The air passage includes an air passage and an evaporator disposed within the air passage, the air passage having one end opened at the upper edge of the opening and the other end opened at the lower edge of the opening, A partition wall is provided in a portion of the air passage along the back wall portion to partition the portion into a front space and a rear space in the front-rear direction of the case, and the evaporator is installed in the front space and the rear space, respectively. An open show case comprising: a damper above the partition wall that can selectively close the upper end of the front space and the upper end of the rear space; and a damper drive mechanism for driving the damper. is known (for example, see Japanese Patent Laid-Open No. 57-26376).

[Problems to be solved by the invention] In the case of a conventional open-air case in which the air passage is divided into a first air passage and a second air passage,
Since the first air passage and the second air passage are arranged in parallel in the left and right direction of the back wall,
The thickness of the air passage in this part can be reduced, and as a result, the space for displaying products can be expanded. However, in the case of this type of open showcase, in order not to impair the above-mentioned advantages, only one evaporator can be provided in the air passage due to the thickness of the air passage. Therefore, when removing frost from the evaporator, the cooling system must be temporarily stopped, defrosted using an electric heater, etc. installed in the evaporator, and then the cooling system must be restarted. . For this reason, while the cooling operation is not performed, an increase in the temperature inside the refrigerator is unavoidable, which results in an increase in the temperature of the products in the refrigerator, which poses a problem in managing the freshness of the products.

On the other hand, in the case of an open-air case of the type described above, in which the air passage is divided into a front space and a rear space, and each of the front space and the rear space is equipped with an evaporator,
Since the evaporator can be defrosted alternately, the temperature inside the refrigerator does not rise even during defrosting, which has the advantage of allowing defrosting while maintaining the freshness of the products in the refrigerator. . However, in the case of this type of open show case, two evaporators are installed in parallel in the air passage, so the thickness of the air passage becomes thicker, which has the disadvantage that the space for displaying products becomes smaller. be.

In view of the above points, in an open show case of a type in which the air passage is partitioned into a first air passage and a second air passage, the front and rear sides have a step along the back wall of the first air passage. A partition plate is provided to partition this part into a front space and a rear space, each having a long and short length in the depth direction of the case, and an evaporator is provided in each of the longer and longer depths of the front space and the rear space, and the front and rear partitions are separated. A damper box is provided above the plate and has a shutter that can selectively close the upper end of the front space and the upper end of the rear space,
The present applicant has proposed an open shutter case characterized by having a motor box with a motor for driving the shutter.
59-46405).

However, in the case of this open shutter case, the motor inside the motor box becomes cold and malfunctions, resulting in a problem that the shutter does not operate reliably.

Therefore, the problem of the present invention is to provide an open showcase that has a large display space for products, can defrost the products inside the refrigerator without losing their freshness, and also has a reliable shutter operation. .

[Means for Solving the Problems] According to the present invention, there is provided a case having a top wall, a back wall, a bottom wall, and a side wall and having an opening in the front, and the top wall and the back wall. first and second air passages extending independently along the top and bottom walls and opening at the upper and lower edges of the opening, respectively; and an evaporator disposed within the first air passage. and the above first
The air passage and the second air passage are arranged in a row in the left-right direction of the back wall at least in the back wall, and the first air passage is located at the upper and lower edges of the opening. In an open case with an edge opening further inside the case than the second air passage, a portion of the first air passage along the back wall that faces the back wall and that A front and rear partition plate having a step in the depth direction of the case is provided to partition a portion along the back wall portion into a front space and a rear space, and the space in the depth direction is configured in the front space with the step as a boundary. The first evaporator is provided in the space part having the longer length in the depth direction among the two space parts having different lengths, and the above-mentioned evaporator is similarly configured in the rear space with the step as a boundary. A second evaporator is provided in the space portion having a longer length in the depth direction among the two space portions having different lengths in the depth direction,
A damper box having a shutter that can selectively close the upper end of the front space and the upper end of the rear space is provided above the front and rear partition plates, and a motor box having a motor for driving the shutter is provided in the damper box. An open show case is obtained which is characterized in that the air passage No. 2 is provided within the air passage.

[Function] In the case of the open show case of the present invention, a front and rear partition plate having a step in the depth direction of the case is provided in the part along the back wall of the first air passage to divide this part into the front space and the rear space. It is divided into two. Due to the step of the partition plate, two space portions having different lengths in the depth direction of the case are formed in the front space and the rear space, respectively, with the step of the partition plate as a boundary. An evaporator is provided in each of the longer space portions in the depth direction of the front space and the rear space created by the step of the partition plate. Therefore, the longer depth space in the front space becomes a storage space for the first evaporator, and the shorter depth space in the front space becomes a part of the first air passage.
Similarly, the longer depth of the rear space becomes a storage space for the second evaporator, and the shorter depth of the rear space becomes a part of the first air passage. Therefore, it is possible to reduce the thickness of the first air passage along the back wall to almost the thickness of the evaporator, and as a result, the product storage space is expanded.

On the other hand, in the present invention, as described above, the front space and the rear space are each provided with an evaporator, and
A damper box with a shutter that can selectively close the upper end of the front space and the upper end of the rear space is provided above the front and rear partition plates, so when defrosting these evaporators, the defrosting is done alternately. It is possible to perform frosting, so there is no need to stop the cooling device during defrosting.

In addition, in the case of the open case of this invention,
A motor box having a motor for driving the shutter is disposed within the second air passage, and the air flowing through the second air passage flows through the first air passage provided with an evaporator. Because it's warmer than the air,
The motor is cooled and does not malfunction, and the shutter operates reliably.

[Embodiment] FIG. 1 is a cross-sectional view of an open show case according to an embodiment of the present invention, and FIGS. 2 and 3 are structural diagrams schematically showing the air passage of the embodiment.

Referring to FIGS. 1 to 3, the top, back, bottom, and side surfaces of the case 1 are provided with heat insulating panels 10, respectively.
As a result, a top wall 10a, a back wall 10b, a bottom wall 10c, and a side wall 10d are formed, and a front opening 10 is formed on the front of the case 1.
e is formed. Upper wall portion 10a, back wall portion 10
b. In order to form independent first and second air passages 11a and 11b along the bottom wall portion 10c, an inner box 12 is provided inside the refrigerator. Upper wall part 10a
The first and second air passages 11a and 11b along the bottom wall portion 10c are divided into upper and lower layers. As shown in Figures 2 and 3, the first and second
The air passages 11a and 11b are arranged in a line in the left-right direction of the back wall portion 10b in the back wall portion 10b. As will be described later, the evaporator and shutter plate are connected to the back wall portion 10b of the first air passage 11a.
It is located along the

An air outlet 14 is provided at the upper edge of the front opening 10e of the case 1, and a suction port 15 is provided at the lower edge of the front opening 10e. Both ends of the first and second air passages 11a, 11b are open at the outlet 14 and inlet 15, respectively. The first air passage 11a opens on the inner side of the case 1 than the second air passage 11b at the air outlet 14 and the suction port 15. As shown by the dashed line in FIG.
The air circulates through a portion along the bottom wall 10c of the second air passage 11b, a portion along the back wall 10b of the second air passage 11b, and a portion along the upper wall 10a of the second air passage 11b. ing. Inside this uncooled wind 16a are first and second evaporators 22.
Air 16b cooled by heat exchange between a and 22b
However, as shown by the solid line in FIG.
1a, a portion along the back wall portion 10b of the first air passage 11a, and a portion along the upper wall portion 10a of the first air passage 11a. An air curtain 16 is formed by these two types of wind. Furthermore, as shown in the figure, shelf boards 18 and net shelves 19 are provided in the warehouse to display products.

A portion of the first air passage 11a along the back wall 10b is provided by providing a front and rear partition plate 20 between the back wall 10b and the inner box 12 so as to face the back wall 10b. The case 1 is divided into two layers in the front and back direction, and this part has a front space 20a and a rear space 2.
0b is configured. The front and rear partition plates 20 are bent at the center and have a step in the depth direction of the case 1. For this reason, in the front space 20,
Two space portions having different lengths in the depth direction of the case 1 are formed with the difference in level between the front and rear partition plates 20 as a boundary. Therefore, the portion of the front space 20a above the step is a space with a long depth, and the portion of the front space 20a below the step is a space with a short depth. Similarly, inside the rear space 20b,
Two space portions having different lengths in the depth direction of the case 1 are formed with the difference in level between the front and rear partition plates 20 as a boundary. Therefore, the portion of the rear space 20b below the step is a space with a long depth, and the portion of the rear space 20b above the step is a space with a short depth.

In the long space part of the front space 20a,
As shown in the figure, the first evaporator 22 is located between the front and rear partition plates 20 and the mounting plate 21 provided on the inner box 12.
a is placed. Further, a second evaporator 22b is disposed in a long space portion of the rear space 20b between the front and rear partition plates 20 and the back wall portion 10b.

Further, a front space 2 is provided at the upper end of the front and rear partition plate 20.
A damper box 23 containing a shutter plate 23a for controlling the opening and closing of the rear space 20b and the rear space 20b is attached, and above the damper box 23, as shown by the solid line arrow in FIG. A blower 17 is provided.

FIG. 4 is a partially cutaway perspective view of the same embodiment, FIG. 5 is a perspective view of the damper box of the same embodiment, and FIG. 6 is a perspective view of the damper box of the same embodiment.

Referring also to FIGS. 4 to 6, a motor box 25 is integrally connected to an end of the damper box 23. As shown in FIGS. Then, the shutter plate 23a can be rotated between the positions (1), (2), and (3) in FIG. 1 by a motor (not shown) inside the motor box 25. There is.

Damper box 23 and motor box 25
In order to incorporate this, a notch 2 is formed in the left and right partition plate 26 between the first air passage 11a and the second air passage 11b.
6a is formed. The position of the notch 26a is
The height is between the height position where the first evaporator 22a is provided and the height position where the fan duct 27 is provided. Note that 27a is a fan mounting hole.

The damper box 23 is placed on the top surface of the first evaporator 22a. At this time, the motor box 25 is positioned in the second air passage 11b through the notch 26a. and placed on the evaporator end 22a'. Note that the notch 26a is closed by the motor box 25.

The internal structure of the damper box 23 is such that a shutter plate 23a is attached to a shutter shaft 23b rotated by a motor in a motor box 25.

In the structure described above, normally the shutter plate 23a is in the position (2) in FIG. Therefore, it is forced to circulate in the direction of the solid line arrow in FIG.

By the way, if one of the evaporators, for example the first
When frost gradually forms on the evaporator 22a, the motor in the motor box 25 is operated under automatic control, and the shutter plate 23a falls to the upper end of the front space 20a (position (1) in FIG. 1). As a result, the front space 20a is blocked and the first evaporator 22a is defrosted.

When frost forms on the second evaporator 22b, the shutter plate 23a falls to the upper end of the rear space 20b (position (3) in FIG. 1), and the second evaporator 22b is defrosted.

In this way, the shutter plate 23a is driven by the motor to fall toward the evaporator to perform defrosting, but the motor box 25 with the motor is located at 11b in the second air passage through which air at a temperature close to room temperature passes. Therefore, the motor does not come into contact with cooling air and is not overcooled, so that it operates normally.

[Effects of the invention] Although the open show case of the present invention is equipped with multiple evaporators, it is possible to defrost the products inside while maintaining their freshness. You can take up more space to display your products than with multiple open show cases.

In addition, in the open show case of the present invention, the motor box is placed in the second air passage through which uncooled air flows, so the motor inside the box does not freeze and can operate reliably. ,
Therefore, the shutter can be operated reliably.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an open show case according to an embodiment of the present invention, Figs. 2 and 3 are schematic configuration diagrams schematically showing the air passage of the embodiment, and Fig. 4 is a part of the embodiment. FIG. 5 is a perspective view of the vicinity of the motor box of the same embodiment, and FIG. 6 is a perspective view of the damper box of the same embodiment. 1...Case, 10a...Top wall portion, 10b...
Back wall part, 10c...bottom wall part, 10d...side wall part,
10e... Front opening, 11a... First air passage, 11b... Second air passage, 14... Air outlet,
15... Suction port, 16a... Uncooled wind, 1
6b...Cooled wind, 20...Front and rear partition plate, 2
0a...Front space, 20b...Back space, 22
a, 22b... Evaporator, 23... Damper box, 23a... Shutter plate, 25... Motor box, 26... Left and right partition plate.

Claims (1)

[Scope of utility model registration request] A case having a top wall, a back wall, a bottom wall, and a side wall, and having an opening in the front; the top wall;
first and second air passages extending independently along the back wall and the bottom wall and opening at the upper and lower edges of the opening, respectively; and arranged within the first air passage. an evaporator, the first air passage and the second air passage
The air passages are arranged in a row in the left and right direction of the back wall at least in the back wall, and the first air passage connects the second air passage at the upper and lower edges of the opening. In an open case that opens on the inside of the case rather than the passage, the first
A front and rear partition plate facing the back wall and having a step in the depth direction of the case is provided in a portion of the air passage along the back wall, so that the portion along the back wall is separated from the front space and the rear. of the two space parts having different lengths in the depth direction, which are configured in the front space with the step as a boundary, a first space part having a longer length in the depth direction. Of the two space parts having different lengths in the depth direction, which are similarly configured in the rear space with the step as a boundary, the space part has the longer length in the depth direction. a second evaporator, and a damper box having a shutter that can selectively close the upper end of the front space and the upper end of the rear space above the front and rear partition plates, and drive the shutter. An open show case characterized in that a motor box having a motor is provided in the second air passage.