JPH0519731Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] Industrial Application Field The present invention relates to a refrigerated case that cools and preserves stored items using a cold air forced circulation system.

BACKGROUND TECHNOLOGY In a refrigerated storage case that employs a cold air forced circulation method, in order to prevent the progress of circulating cold air from being obstructed by the stored items stored in the storage chamber, a wall along one of the side walls constituting the stored items is installed. A cold air outlet is provided on one side wall of the bottom of the storage room to raise the cool air, and an air intake port is provided on the bottom of the other side wall opposite to this one side wall, and a cooler installed below the bottom of the storage room cools the air. A device that supplies air for this purpose is common, and is described as a prior art in, for example, Japanese Utility Model Publication No. 60-22301. Although it is not pointed out in the publication, when the inside of a storage chamber with an air outlet on one side of the bottom of the stored product, that is, one side of the rectangular bottom, and an air inlet on the opposite side, the temperature near the air outlet decreases. In comparison, the temperature near the suction port is inevitably higher due to the heat load of stored products and heat loss due to outside air intrusion due to the opening and closing operations of the takeout port.

Problems to be solved by the invention In the conventional technology, there is a difference between the temperature near the outlet and the temperature near the inlet, so compared to products stored near the outlet, products stored near the inlet are not stored near the inlet. There was a problem in that the products that were placed inside the room cooled down more slowly and that extreme differences in product temperature occurred depending on the indoor placement. Furthermore, since the air outlet is located on one side wall of the bottom surface, there is a problem in that it is very difficult to equalize the amount of air blown by the blower over the entire air outlet.

Therefore, the present invention provides a refrigerated storage case in which the temperature near the air outlet, the area near the suction port, and the entire storage room are made substantially uniform.

[Structure of the idea]

Means for Solving the Problems The insulating box of the present invention has a foam insulation material filled between the outer box and the inner box, and has a door that freely opens and closes the top opening of the inner box. A storage chamber is formed with the box, and an evaporator is located below the evaporator, and a cooling fan is surrounded so that the inside of the storage chamber is divided into upper and lower sections.
It is equipped with a fan case that is divided into two sections, and a bedding that has a number of gaps in which stored items with a round cross section are placed, the lower part of which is held by an inner box above the fan case, and the air is cooled by an evaporator. A cooling fan and a fan case are used to blow out air from below a portion that covers more than half of the bedding area.

Function The air cooled by the evaporator 29 is blown out from below the bedding 22 so that it directly hits the lower part of the stored items 33, and also passes through the gap formed between the stored items 33 having a round cross section. This allows the cold air to rise to the top of the building.

Embodiments Embodiments of the present invention will be described below with reference to FIGS. 1 to 10.

Reference numeral 1 denotes a low-temperature refrigerator having an opening on the top surface, and will be explained using a forced air-cooled refrigerating case exclusively for round containers as an example. Reference numeral 2 denotes an insulating box body as the main body of the low temperature refrigerator 1, which includes, for example, a metal outer box 3 and this outer box 3.
An inner box 4 made of synthetic resin is provided at a distance from the bottom wall and has a top opening, and a machine room 5 is provided below the bottom wall of the inner box 4 along with the lower part of the outer box 3. , and a foamed heat insulating material 7 such as foamed polyurethane filled between the inner box 4 and the outer box 3 and between the inner box 4 and the top plate 6.

The outer box 3 is provided with a plurality of intake ports 8 and exhaust ports 9 on the side surface of a portion corresponding to the machine room 5 for cooling the condenser 11 and the like. The top plate 6 is the capacitor 1
A fan motor mounting part 14 that fixes a fan motor 13 for driving a cooling fan 25 that blows air cooled by a condensing fan 12 that blows air into the storage room 21 and an evaporator 29 that will be described later into the storage room 21; It consists of a relief part 16 that exposes the top of the compressor 15, which is the tallest among the parts arranged in the air conditioner, and a flange 17 that prevents the foamed heat insulating material 7 to leak into the machine room 5 side. .

The inner box 4 has four sides, and a bedding 22 with many gaps as a stand for placing products in the storage room 21. For example, a net shelf made of wire is used to improve ventilation.
Bedding support part 2 that removably receives the lower part of this net shelf
3, a cooling fan section 26 that is located below the receiving section 23 and at the rear of the show case 1 and includes a motor shaft 24 extending from the fan motor 13 and a cooling fan (hereinafter referred to as a cooling fan) 25; A fan case receiving portion 28 that receives the fan case 27 and an evaporator receiving portion 3 that receives the evaporator 29 located at the front of the fan case 1.
0, a drainage passage 31 formed by sloping downward from the rear to the front of the inner box 4, and this drainage passage 3.
1 and a drain port 32 provided at the lowest position. The drainage passage 31 is slightly inclined downward from the side surface of the inner box near the cooling fan 25 to the side surface farthest from the inner box.

In addition, the wire of the net shelf is made of a steel core coated with polyethylene, and the shelf net is composed of a frame part and a crosspiece part in order to have flexibility.
For example, a frame with a diameter of 5 mm is used, and a crosspiece with a diameter of 3 mm, for example, is used. In addition, the fan case 27 is formed by bending SPG (electrogalvanized steel plate) material, and in order to obtain flexibility, it is 0.7 mm to 1.0 mm.
Use one with a thickness of about mm.

Here, the bedding receiving part 23 is composed of a rear flange 23a provided at the lower part of the rear side of the inner box 4, and front corner pieces 23b, 23b provided at both front corners, and receives the frame part of the bedding 22. to hold the bedding 22 horizontally. Furthermore, as shown in FIG. 7, even if dew generated during cooling of the storage chamber 21 or water droplets spilled from the stored items 33 drips onto the cooling fan section 26, as shown in FIG.
In order to prevent water from flowing into the fan motor 13, an annular raised raised part 34 is provided, and an O-ring 35 is provided on the motor shaft 24 to scatter water droplets that travel down the motor shaft 24 and fall. A water receiving portion 36 is provided surrounding the motor shaft 24 to receive water droplets that are scattered. still,
It is desirable that the portion into which the motor shaft 24 is inserted is raised up. Further, a drain pipe 37 is provided on the bottom surface of the cooling fan section 26 for discharging scattered water. Note that the storage item 33 is a container with a round cross section containing a product.

Further, a door 38 that closes the top opening of the inner box 4 is provided on the upper part of the inner box 4, and door rails 39, 39 that slidably hold this door 38 and restrict the sliding limit of the door 38 are provided. 40, 40 per door are provided. The door 38 is formed of double glass 42 surrounded on four sides by a door sash 41, and the door sash 41 is provided with a regulating piece 43 that functions as a handle. On the other hand, in order to prevent the cold air blown from the air outlet 57 from leaking from the gap 44 formed between the door sash 41 and the door stop 40, the door stop 40 has flexible fins 45.
is formed.

On the other hand, the cooling fan case 27 is provided with a hole 51 through which the cooling fan 25 is exposed, and a fan guard 52 is provided around the hole 51 so as to surround the fan 25. The fan guard 52 is provided with a plurality of air discharge holes 53 on the upper surface and adjacent side surfaces, respectively. The cold air discharged from the discharge hole 53 provided on the top surface moves upward as it is, and the cold air discharged from the discharge hole 53 provided on the side surface is changed direction by the wind direction regulating member 54 and flows upward. The wind direction regulating member 54 is provided closer to the evaporator 29 than the center line of the bedding 22 and has a U-shaped cross section so that cold air can be blown out from more than half of the area of the bedding 22. The upper surface of this wind direction regulating member 54 is connected to the stored items 33 on the bedding 22
When the bedding 22 is placed, the weight of the stored items 33
Although it bends, it also functions as a support member for the bedding 22 that receives this bending. Also, bedding 22
The deflection presses not only the wind direction regulating member 54 but also the upper surface of the fan guard 52, and using this pressing force, the fan case 27 is clamped and fixed to the fan case receiving part 28. If the evaporator 29 is fixed to the bottom of the inner box 4 using screws or the like, there is a risk that moisture may infiltrate into the heat insulating material 7 from this fixed part. It is positioned through an elastic material 55 having elasticity.
Further, a gap is provided between the front part of the fan case 27 and the front side of the inner box 4, and this gap is filled with the suction port 5.
It is set at 6.

A base 58 forming the lower surface of the heat insulating box 2 is attached to the machine room 5, and a compressor 15, a condenser 11, a condensing fan 12, a fan case 59, etc. are mounted on this base 58.
A drain tank mounting plate 61 for holding a drain tank 60 in and out of the base 58 is provided at a suitable position on the lower surface of the base 58. Casters 62 as leg members are attached to the four corners of the lower surface of the base 58. 63 can be used even when the space for arranging the insulation box 2 is narrow.
In order to prevent the intake/exhaust ports 8 and 9 from being blocked, this is a support member that maintains a distance from the wall surface.

The configuration of the refrigerating case 1 is as described above, and its operation will be briefly explained below.

First, when the power (not shown) is turned on, the fan motor 13 is energized, the motor shaft 24 rotates, the condensing fan 12 and the cooling fan 25 operate, and air is taken into the machine room 5, and the storage room The air within 21 undergoes forced circulation. On the other hand, the compressor 15 starts operating, the refrigerant is circulated in the refrigerant circuit along the cooling operation path, and the condenser 11 and the evaporator 29 exchange heat with the air, respectively, so that the air in the storage chamber 21 is cooled. Ru. To explain this situation in more detail, as the refrigerant circulates, the evaporator 2
9 acts to cool the surrounding air. The cold air sent into the fan guard 52 by the operation of the cooling fan 25 is transferred to the discharge hole 5.
3, the direction is regulated by the guard 52 and the wind direction regulating member 54, and the air is blown upward toward the stored items 33 from a portion corresponding to the air outlet 57, which has an area of more than half of the bedding 22. This cold air cools the sides of the stored items 33 placed on the bedding 22, rises through the gap formed between the stored items 33, and is changed direction by the doors 38, 38.
It descends toward the suction port 56. The cold air that descends after cooling the stored material 33 is sucked in through the suction port 56, passes through the evaporator 29, is cooled again, and returns to the cooling fan 25. Thereafter, the above-described cold air circulation is repeated while the cooling operation continues. Note that since the fan case 27 is located on the upper surface of the evaporator 29, a cold air shoot cycle in which the cold air blown out from the outlet 57 is directly sucked into the evaporator 29 does not occur. Compared to the conventional case 1, the area from which cool air is blown out is sufficiently large, and the lower part of the bedding 22 on which the stored items 33 are placed is used as the air outlet 57, so that the stored items 33 are evenly distributed. In addition, it is possible to reduce the temperature difference between the vicinity of the outlet and the vicinity of the suction port, which conventionally occurs, and eliminate uneven cooling of the stored items 33.

In addition, by eliminating the fixing points with screws to the inner box 4, the weight of the stored items 33 is
Bedding 22, fan case 27 and evaporator 2
By fixing the inner box 9, it is very easy to install and remove each one, and the work for cleaning the inner box 4 is simplified, and there is no need to worry about poor insulation due to water intrusion.

Furthermore, by providing a support member 63 at the rear lower part of the show case 1, even if it is placed in a narrow space under the counter in a store, the distance between the wall surface and the outer box 3 can be maintained at a constant distance.・Exhaust port 8,
9 is not blocked, and the inside of the machine room 5 can be cooled.

[Effect of idea]

As detailed above, according to the present invention, the air cooled by the evaporator is directed downward through the cooling fan and the fan case into a portion having an area of more than half of the bedding, which has numerous gaps for placing stored items. By directing the air out, there is no need to install a special air outlet, and the cold air can be uniformly discharged into the stored items and even into the storage room, reducing temperature differences within the storage room and eliminating uneven cooling caused by the location of stored items. can be eliminated.

[Brief explanation of drawings]

Each figure shows one embodiment of the present invention, and Fig. 1 shows the second embodiment.
Figure 2 is an external perspective view of the insulating box, Figure 3 is a BB sectional view of Figure 2 with the door closed and the stored items stored, and Figure 4 is a cross-sectional view of the insulation box. 5 is a sectional view taken along line DD in FIG. 2, FIG. 6 is an enlarged view of section E in FIG. 4, FIG. 7 is an enlarged view of section F in FIG. The figure is a plan view of the box with the door removed.
The figure is a plan view of the state shown in FIG. 8 with the stored items removed, and FIG. 10 is a plan view of the state shown in FIG. 9 with the bedding removed. 2...Insulated box body, 3...Outer box, 4...Inner box, 7
...Foam insulation material, 13...Fan motor, 21...
...Storage room, 22...Bedding, 25...Cooling fan, 27...Cooling fan case, 29...
...Evaporator, 33...Storage room, 38...Door,
39... Door rail, 40... Door per, 45... Fin, 52... Fan guard, 53... Discharge hole, 5
4... Wind direction regulating member, 55... Elastic material, 56...
Suction port, 57... air outlet.

Claims (1)

[Scope of utility model registration request] A foam insulation material is filled between the outer box and the inner box, and a door is provided to freely open and close the top opening of the inner box,
In the insulated box body that forms a storage room with the door and the inner box, a fan case is provided below which the evaporator is located, and which surrounds the cooling fan and divides the storage room into two parts, an upper and lower part; and a bedding having a number of gaps, the lower part of which is held by the inner box and in which stored items having a round cross section are placed, and the air cooled by the evaporator is transferred to the bedding by the cooling fan and the fan case. A heat insulating box body characterized in that air is blown out from below in a part having an area of more than half of the area of the box body.