JPH07280414A - Cooling device - Google Patents

Abstract

PURPOSE:To provide a cooling device in which parts in use are reduced in number and air can be passed through the machine chamber with improved effciency. CONSTITUTION:There are provided a machine chamber 27 under an insulating casing 2, a condenser 29 set inside this machine chamber 27, a through hole for discharging air and a slit for taking in air both formed in the machine chamber 27, a blower 31 for the condenser which sucks in outside air through the slit and after its passage through the condenser 29 discharges it toward the through hole, and a pair of projections 93 jutting out downward from the bottom wall 13 of the insulating casing 2 and extending toward the through hole at the two lateral sides on the discharge side of the blower 31 for the condenser.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a low temperature showcase or the like.

[0002]

2. Description of the Related Art Conventionally, in this type of low temperature showcase, for example, Japanese Patent Publication No. 63-26313 (F25D1).
9/00), a machine room is formed in the lower part of the main body composed of a heat insulating box, and the compressor, condenser, blower, etc. included in the refrigeration cycle are installed in this machine room. . Then, the blower is operated to suck the outside air from the outside air inlet, ventilate to the condenser and air-cool, and then ventilate to the compressor and other equipment, and finally exhaust from the blowout port to the outside. It had been.

[0003]

By the way, in the machine room, various pipes, electric equipment boxes, electric wirings, etc. are installed in addition to the compressor, but these obstruct the ventilation in the machine room. Therefore, conventionally, a partition plate or a wind direction plate is generally installed in the machine room so that the air (outside air) discharged from the blower can smoothly flow from the outside air inlet to the outlet, increasing the number of parts and assembling. There is a problem that causes deterioration of workability and soaring costs.

The present invention has been made to solve the above-mentioned conventional technical problems, and while reducing the number of parts,
An object of the present invention is to provide a cooling device with improved ventilation performance in a machine room.

[0005]

A cooling device according to the present invention comprises a machine room formed below a heat insulating box, a condenser installed in the machine room, and an air outlet and an air intake formed in the machine room. And a blower for the condenser that sucks outside air from this air inlet, passes it through the condenser, and then discharges it toward the air outlet, and at least from the bottom wall of the heat insulating box on both sides of the discharge side of the condenser blower. And a pair of protrusions that extend toward the air outlet.

In addition to the above, the cooling device of the invention of claim 2 is characterized in that an injection hole for the foamed heat insulating material is formed in the protrusion.

[0007]

According to the present invention, since a pair of projections projecting downward from the bottom wall of the heat insulating box at least on both sides of the discharge side of the condenser blower and extending toward the air discharge port are formed, The outside air sucked from the air intake port and passed through the condenser is guided to both the protrusions, passes between these protrusions, and can smoothly flow to the air discharge port. Therefore, the outside air that has passed through the condenser can be smoothly discharged from the air discharge port without providing a special wind direction plate, etc., so that it is possible to reduce the number of parts and the number of assembly steps and the cost. Becomes

In particular, when the injection hole for the foamed heat insulating material is formed in the protrusion as in the second aspect of the present invention, in the so-called SF foaming method using a fixed foaming machine, the foamed heat insulating material is removed from the bottom surface of the heat insulating box. The stock solution can be injected, and the appearance can be improved by preventing the injection port from being exposed to the outside.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a rear perspective view of a low temperature showcase 1 as an embodiment of a cooling device of the present invention, FIG. 2 is a vertical side view of the low temperature showcase 1, and FIG. 3 is a vertical perspective view of a heat insulating box 2 of the low temperature showcase 1. FIG. 4 is a plan sectional view of the lower portion of the low temperature showcase 1, and FIG. 5 is a front perspective view of the low temperature showcase 1. In each figure, a low temperature showcase 1 is used for displaying and storing ice cream or the like in a convenience store or the like, and is composed of a heat insulating box 2 having a horizontally long rectangular shape opened upward.

The heat-insulating box body 2 includes a metal outer box 3 and a metal inner box 6 which is incorporated in the outer box 3 with a space therebetween.
And a foam heat insulating material 7 such as polyurethane foam filled between the boxes 3 and 6 by an in-situ foaming method.

Duct plates 8 and 9 are attached inside the front and rear surfaces of the inner box 6 with a space therebetween.
A bottom plate 11 is detachably installed between the lower ends of the inner box 6 and a series of ducts 12 standing up and down from the bottom surface inside the inner box 6.
A storage chamber 22 is defined inside the base plate 9 and the bottom plate 11. on the other hand,
The bottom wall 13 of the heat insulating box 2 has a stepped shape having a lower portion 13A in the front part and a higher portion 13B in the rear part, and the bottom plate 11 is located above the higher part 13B.

A drain pan 14 made of a metal plate such as stainless steel or aluminum is provided on the upper surface of the lower portion 13A of the bottom wall 13, and the lowest position of the drain pan 14 communicates with the outside of the heat insulating box 2. Drainage hole 16
Are formed. A horizontally long plate fin type cooler 17 is disposed above the drain pan 14 in the duct 12, and a fan case 18 provided on the front side of the cooler 17 comprises a suction type propeller fan. A plurality of blowers 19 ... Are attached.

A high-level portion 13B on the rear side of the cooler 17
The stepped portion of the lower portion 13A is formed as an inclined surface 13C so that the upper portion thereof is separated from the cooler 17. The upper end of the duct plate 9 is a discharge port 9A, the upper end of the duct plate 8 is a suction port 8A, and inwardly curved wind direction plates 21, 21 are attached to the discharge port 9A at predetermined intervals.

On the other hand, side plates 41, 41 made of a transparent acrylic resin thick plate are provided upright on both sides of the opening of the heat insulating box 2. The side plates 41, 41 have a substantially mountain shape in which the front and rear sides 41A, 41B are inclined so that the upper portions thereof are close to each other, and a stainless top plate 42 is provided between the upper ends of the side plates 41, 41B. It is screwed from the side via 43.

The top plate 42 has a mountain-shaped cross section along the shape of the side plates 41, 41, and the lower surface of the top plate 42 is provided with front and rear stainless steel upper support plates 44, 44, which are also made of stainless steel. A plate 46 is attached. The upper support plates 44, 44 are spaced apart from the lower surface of the top plate 42 by a predetermined distance, and the tips of the upper support plates 44, 44 are inclined downwards substantially along the inclination of the front and rear sides 41A, 41B of the side plate 41. A horizontally long fluorescent lamp 51 is housed and arranged on the lower surface of the reflector plate 46, and a ballast 52 for lighting the fluorescent lamp 51 is arranged on the upper surface.

On the other hand, rails 63, 63 are attached to the front and rear opening edges of the heat insulating box 2 across the left and right, and the storage chamber 22 of the low temperature showcase 1 is located between these rails 63, 63 and the top plate 42. Open in the front-back direction (openings 64, 6
4) Do. With such a configuration, the front and rear openings 64, 64 of the storage chamber 22 of the low temperature showcase 1 are located inwardly of the lower edge and open obliquely upward, and the rails 63, 63 are below the openings 64, 64. The front and rear side surfaces of the upper support plates 44, 44 and the reflection plate 46 located at the edges are provided with openings 64, 64.
It will be located at the upper edge of.

A plurality of sliding door type doors 73, ... Made of, for example, a transparent acrylic resin plate or transparent glass are slidably mounted and supported on the rails 63. In this case, in the embodiment, there are 8 doors 7 inside and 2 outside.
3, the upper portion of the door 73 supported inside is supported by the front and rear side surfaces of the reflection plate 46, and the upper portion of the door 73 supported outside is supported by the upper support plate 44.

Kick plates 26, 26 having a large number of through holes 24 (at the front side serving as an air exhaust port and at the rear side serving as an air intake port) at the front and rear of the lower end of the heat insulating box 2.
Is attached, and a machine room 27 is formed between the kick plates 26 and 26 and below the heat insulating box 2. The machine room 2 located below the high-order portion 13B
3, a compressor 89 and a condenser 2 forming a known refrigeration cycle together with the cooler 17 from the right side in FIG.
9, the condenser blower 31, the electrical equipment box 91, etc. are sequentially arranged on the base 101, and the rear surface of the machine room 27 is closed by a plurality of panels 36 to 38 so that the panels 37 and 38 can be opened and closed. A plurality of slits 39 ... (The slit 39 of the panel 37 serves as an air intake) are formed.

On the bottom surface 3A of the outer box 3 which serves as the ceiling of the machine room 27, a pair of projections 93 are formed which are located on the high level portion 13B side of the low level portion 13A and project downward. The inside of 93 communicates with the space between the inner and outer boxes 6, 3. The protrusions 93, 93 are gradually lowered rearward (toward the high-level portion 13B), and the high-level portion 13 of the low-level portion 13A is reduced.
A side surface 93A facing rearward is provided at the end portion on the B side. The side surface 93A has an injection hole 94 for the undiluted solution of the foam insulation material.
And the injection holes 94 are formed in the inner and outer boxes 6,
It communicates with the space between the three.

Further, the both projections 93, 93 are located on the left and right outside and in front of the condenser 29 (on the front kick plate 26 side) in the front-rear direction (that is, in the direction of the through hole 24 of the front kick plate 26). The side surfaces 93A and 93A extend and are located inward of the rear surface (outer surface) 3B of the outer box 3.

A mounting plate 98 is attached to the side surface 93A for fixing a cardboard pipe (not shown) for injecting the undiluted solution of the foam insulation material to the injection port 94. At the time of filling the foamed heat insulating material 7, both the inner and outer boxes 6 and 3 are set in a fixed foaming jig (not shown), and the pipe extends to the rear surface 3B side of the outer box 3 and opens. Then, the undiluted solution of the foamed heat insulating material 7 is injected from this opening, and is discharged from the injection hole 94 through the pipe into the inner and outer boxes 6 and 3. The discharged undiluted solution smoothly grows upward from the protrusion 93 located at the lowermost end, fills the space between the inner and outer boxes 6, 3 and solidifies.

At this time, the injection hole 94 is formed on the rear surface 3B of the outer box 3.
The injection hole 94 is not exposed to the outside because it is located inside. Therefore, the appearance of the heat insulating box 2 can be improved. The pipe is to be cut off thereafter.

Next, the operation of the low temperature showcase 1 having the above structure will be described. When the compressor 89, the blower 19, and the condenser blower 31 are operated, the cool air cooled by the cooler 17 is blown backward in the duct 12 from the inclined surface 13C and from the discharge port 9A at the upper end of the duct plate 9. Storage room 22
Is discharged toward the upper part of. The cold air that has circulated in the storage chamber 22 is sucked into the duct 12 from the suction port 8A at the upper end of the duct plate 8 and is circulated to return to the blower 19 (indicated by a dashed arrow in FIG. 2). As a result, the inside of the storage chamber 22 is cooled to a freezing temperature such as -20 ° C.

On the other hand, when the condenser blower 31 is operated, outside air is sucked through the slit 39 of the panel 37 and the through hole 24 of the rear kick plate 26 located below the slit 39 as shown by arrows in FIGS. 3 and 4. After the condenser 29 is air-cooled, it is discharged forward. Most of the air discharged from the condenser blower 31 has protrusions 93 located on the front left and right sides.
The lower part of the lower portion 13A is smoothly guided to the front by 93, and discharged from the through hole 24 of the front kick plate 26 to the outside.

An airflow direction plate 96 having a predetermined height and width is erected on the base 101 of the machine room 27 on the front side (discharge side) of the condenser blower 31 on the right side in FIGS. 3 and 4. Has been done. The wind direction plate 96 is attached to the compressor blower 31 at a right angle with respect to the ventilation direction (front-back direction) from the right angle to the compressor 89 direction, and a part of the air discharged from the condenser blower 31 is shown in FIG. The flow is divided toward the compressor 89 as indicated by the arrow in FIG. The split air is discharged to the outside from the slit 39 of the panel 38 after air-cooling the compressor 89.

Further, in the embodiment, the protrusion 9 is provided on the lower portion 13A.
However, the present invention is not limited to this. For example, the protrusions 93, 93 may be extended to both sides of the condenser 29 by extending to the high portion 13B. Furthermore, although the present invention is applied to the low temperature showcase in the embodiments, the present invention is not limited to this, and the present invention is effective for various cooling devices such as refrigerators and air conditioners.

[0027]

As described in detail above, according to the present invention, at least the pair of bottom walls of the heat insulating box on both sides of the discharge side of the condenser blower, projecting downwardly therefrom and extending toward the air outlet. Since the protrusions are formed, the outside air sucked from the air intake and passed through the condenser is guided by both protrusions and passes between these protrusions, and can smoothly flow to the air outlet. . Therefore, the outside air that has passed through the condenser can be smoothly discharged from the air discharge port without providing a special wind direction plate, etc., so that it is possible to reduce the number of parts and the number of assembly steps and the cost. Becomes

Particularly, when the injection hole for the foamed heat insulating material is formed in the protrusion as in the second aspect of the invention, in the foaming method using the fixed type foaming machine, the undiluted solution of the foamed heat insulating material is discharged from the bottom surface of the heat insulating box. It becomes possible to inject, and it is possible to prevent the inlet from being exposed to the outside and improve the appearance.

[Brief description of drawings]

FIG. 1 is a rear perspective view of a low temperature showcase to which the present invention is applied.

FIG. 2 is a vertical sectional side view of a low temperature showcase to which the present invention is applied.

FIG. 3 is a vertical perspective view of a heat insulating box body of a low temperature showcase to which the present invention is applied.

FIG. 4 is a plan sectional view of a lower portion of a low temperature showcase to which the present invention is applied.

FIG. 5 is a front perspective view of a low temperature showcase to which the present invention is applied.

[Explanation of symbols]

 1 Low Temperature Showcase 2 Insulation Box 3 Outer Box 3A Bottom 6 Inner Box 7 Foam Insulation 13 Bottom Wall 13A Lower Part 13B Higher Part 24 Through Hole 26 Kick Plate 29 Condenser 31 Condenser Blower 37, 38 Panel 39 Slit 89 Compression Machine 93 Projection

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Yoshihisa Ishida 2-5-5 Keihan Hon-dori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Shuji Kashide 2-chome, Keihan Hon-dori, Moriguchi City, Osaka Prefecture No. 5-5 Sanyo Electric Co., Ltd. (72) Inventor Toyosaku Hamada 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Prefecture Sanyo Electric Co., Ltd. (5) No. 5 Hiroshi Hayashi Keisakamoto-dori, Moriguchi City, Osaka Prefecture 2-5-5 Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A machine room configured below an insulating box, a condenser installed in the machine room, an air exhaust port and an air intake port formed in the machine room, and sucking outside air from the air intake port. Then, after passing through the condenser, a condenser blower that discharges in the direction of the air discharge port, and at least projects downward from the bottom wall of the heat insulating box body on both sides of the discharge side of the condenser blower, and discharges the air. A cooling device comprising: a pair of protrusions extending in an outlet direction. 2. The cooling device according to claim 1, wherein an injection hole for the foamed heat insulating material is formed in the protrusion.