JPH10253229A - Showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a showcase to perform proper prevention of condensation on the surface of a transparent door. SOLUTION: A showcase is formed such that an evaporator 6 is arranged at an inner upper part of a cold insulation chamber 1, and since the air for cooling which has been heat-exchanged by the evaporator 6 is circulated from the back side of the interior of the cold insulation chamber 1 through the front side, cold air right after heat-exchange is prevented from making contact with the back of the glass plate of a transparent door 3. Namely, since comparatively warm air deprived of a cold heat by refrigerated or frozen goods is brought into contact with the back of the glass plate of the transparent door 3, even under high outside air temperature and humidity environment, by reducing a temperature difference between the surface side (outside air) of the glass plate and the back side (the cold insulation chamber), condensation on the surface of the glass plate is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a showcase having a transparent door in front of a cool room, and more particularly to a showcase capable of preventing dew condensation on the surface of the transparent door.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 8-54171 discloses a showcase of this type.

In the showcase disclosed in the publication, a forward opening is formed between a machine body and a case body corresponding to the front side of the showcase, and a part of the heated air heat-exchanged by the condenser is formed. By discharging the water forward from the opening, dew condensation on the surface of the glass door is to be prevented.

[0004]

In the above-mentioned conventional showcase, the heated air discharged from the opening escapes to the front, so that dew condensation on the portion near the opening of the glass door can be prevented. However, there is a problem that the dew condensation on the upper portion cannot be prevented.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a showcase that can appropriately prevent dew condensation on the surface of a transparent door.

[0006]

In order to achieve the above object,
The present invention relates to a showcase provided with a cold room having a transparent door on the front and a machine room in which a condenser and a fan for a condenser are arranged at a lower portion. The main feature of the present invention is that an evaporator fan for circulating the cooling air heat-exchanged in the cooler from the rear side to the front side in the cool room is provided.

According to the present invention, the cooling air heat-exchanged in the evaporator in the upper part of the cold storage room is circulated from the back side to the rear side in the cold storage room, so that the cold air immediately after the heat exchange is formed on the rear surface of the transparent door. By avoiding contact with air, the temperature difference between the front side (outside air) and the back side (cooling room) of the transparent door can be reduced.

[0008]

1 to 5 show one embodiment of the present invention. In the drawings, reference numeral 1 denotes a cool room, and 11 denotes a machine room.

A cool room 1 includes a heat-insulating case 2 having an open front surface, and a transparent door 3 for opening and closing the front opening of the case 2.
It is composed of The transparent door 3 includes a rectangular glass plate 3a, a frame 3b surrounding the glass plate 3a, and a rubber packing 3c attached to the back surface of the frame 3b. It is freely supported.

[0010] A pair of columns 4 are provided on the left and right sides in the cool room 1, respectively, and a plurality of shelves 5 are supported between the opposite columns. Incidentally, the vertical position of each shelf plate 5 can be arbitrarily changed by changing the engagement position with the column 4.

Further, an evaporator 6 is provided at the center in the front-rear direction of the upper part in the cool storage room 1, and an evaporator fan 7 is provided on the rear side thereof in a state of being inclined rearward. The area in which the evaporator 6 and the evaporator fan 7 are arranged is separated from the cool room 1 by a partition plate 8 provided below the evaporator 6 and the evaporator fan 7. Also,
The rear end of the partition plate 8 extends downward along the rear surface of the cold storage chamber 1 and at a distance from the rear surface. The extended portion 8a has a horizontally long rectangular shape or The air holes 8b are formed of small holes arranged at equal intervals in the width direction. Incidentally, the rotation direction of the evaporator fan 7 is set such that the left side in FIG. 2 is on the suction side and the right side is on the blowing side.

Further, a fluorescent lamp 9 is arranged in the width direction in front of the evaporator 6 in the cold storage room 1, and a light transmissive advertising board 10 is arranged in front of the fluorescent lamp 9. Characters and the like written on the advertisement board 10 can be visually recognized from the outside through the glass plate 3a of the transparent door 3.

On the other hand, the machine room 11 is composed of a case 12 which is connected to the lower surface of the case 2 and has an open front surface, and a cover 13 which covers the front opening of the case 12. A first exhaust port 12a formed of a group of vertically long holes arranged at equal intervals in the width direction is formed on the back of the case 12, and engagement holes 12b into which the hooks 13a of the cover 13 are inserted and engaged are formed on both sides of the front. (See FIG. 3). The cover 13 is provided with hooks 13 a for two right and left sides, and the hooks 13 a are detachably attached to the front surface of the case 12 by engaging the hooks 13 a with front engagement holes 12 b of the case 12. As shown in FIG. 3, the cover 13 has a shape having a front surface, upper and lower surfaces, and left and right surfaces, and a horizontally-long rectangular first air inlet 13b is formed at the center of the front surface in the vertical direction. And a lower surface comprising a group of rectangular holes arranged at equal intervals in the width direction.
Are formed, and a second exhaust port 13d formed of a group of rectangular holes arranged at equal intervals in the width direction is formed on the upper surface. Incidentally, the formation area of the second exhaust port 13d corresponds to at least the width dimension of the glass plate 3a of the transparent door 3. In addition, since the case 12 and the case 2 described above have their front ends (front opening surfaces) coincident with each other in the front-rear direction, when the cover 13 is attached to the case 12, the cover 13 is dimensioned in the front-rear direction. As a result, the second exhaust port 13d is located on the upper surface of the projecting portion, and the front end of the second exhaust port 13d is transparent. The door 3 protrudes beyond the frame 3b.

In the machine room 11, a first intake port 1 is provided.
A condenser 15, a condenser fan 16, and a compressor 16 are arranged in this order from 3 b toward the first exhaust port 12 a, and a tank 1 for collecting drain water is provided beside the condenser 15.
7 is provided so as to be able to be pulled out from the opening of the case 12. Incidentally, the rotation direction of the condenser fan 15 is set such that the left side in FIG. 2 is on the suction side and the right side is on the blowing side.

Further, an exhaust duct 18 connecting the second exhaust port 13d and the outlet side of the condenser fan 16 is provided in the machine room 11. This exhaust duct 18
Is composed of first to fifth duct plates 18a to 18e as shown in an exploded view in FIG.

The first duct plate 18a includes a pair of side plates 18a.
1 and the rear plate 18a2.
With the front surface of both side plates 18a1 abutting on the rear surface of the casing of the condenser 14 and the upper surface abutting on the upper surface of the machine room 11, both sides of the condenser fan 15 and the blowout side are fixed to the lower surface of the machine room 11. Cover the part except the lower part.

The second duct plate 18b is formed by bending four pieces of a rectangular plate, and the side plate 1 of the first duct plate 18a is bent.
8a1 and the upper side of the condenser fan 15 and the condenser 14 while being fixed to the upper surface of the condenser 14 and the casing. As can be seen from FIG.
The front bent portion 18b1 of b is bent so as to be inclined rearward from the vertical, and controls the discharge direction of the heated air discharged from the second exhaust port 13d in the direction toward the surface of the transparent door 3. Has a role as a board. Further, the second duct plate 18b is provided inside the second duct plate 18b.
A wind direction plate 18b2 for equalizing the amount of air in the width direction of the heated air flowing through the horizontally long flat passage formed by the first duct plate 18c and the third duct plate 18c has a predetermined angle in accordance with the rotation direction of the condenser fan 15 and the like. Is provided. This wind direction plate 18b
The angle of 2 is set by experiments or the like. Further, a notch 18b3 is formed at the center in the width direction of the rear bent portion of the second duct plate 18b.

The third duct plate 18c is formed by bending both sides of a rectangular plate. The third duct plate 18c is fixed to the second duct plate 18b and covers a portion of the second duct plate 18b except for the upper surface at the front end, and is horizontally long. Form a flat passage. Condenser fan 1
The warmed air from 5 is taken into this horizontally long flat passage through a hole formed by the cutout 18b3 of the second duct plate 18b.

The fourth duct plate 18d is formed by bending both sides of a horizontally long rectangular plate, and is fixed to the front end of the second duct plate 18b at a position away from the front bent portion 18b1 behind the front bent portion 18b1. , Locally covers the upper surface of the front end of the second duct plate 18b. As can be seen from FIG. 2, the front bent portion 18d1 of the fourth duct plate 18d is bent vertically, and the wind direction plate for controlling the discharge direction of the heated air discharged from the second exhaust port 13d upward. As a role.

The fifth duct plate 18e is formed by bending both sides of a horizontally long rectangular plate, and a front bent portion 18d1 of the fourth duct plate 18d is provided at the front end of the second duct plate 18b.
The upper surface of the front end portion of the second duct plate 18b (the portion behind the fourth duct plate 18d) is locally covered while being fixed at a position further away from the rear.

The exhaust duct 18 is connected to the second through fifth
The second exhaust port 13d is provided by the duct plates 18b to 18e.
At the front end thereof, corresponding to the formation region of. When the cover 13 is attached to the case 12, the horizontal opening at the front end of the exhaust duct 18 is aligned with the lower side of the second exhaust port 13d of the cover 13, and the second duct plate 18
The front bent portion 18b1 of b is located forward of the frame 3b of the transparent door 3. Further, a horizontally long opening at the front end of the exhaust duct 18 is partitioned forward and backward by a fourth duct plate 18d.

Here, the operation of the above showcase is shown in FIG.
This will be described with reference to FIG. Evaporator 6 in cold storage room 1 and machine room 1
The condenser 15 and the compressor 16 in 1 constitute a refrigeration circuit with expansion means (not shown). When the refrigerating circuit, the evaporator fan 7 and the condenser fan 15 are operated, the evaporator 6 is located on the side of the cold storage room 1 as indicated by a broken line arrow in FIG.
The cooling air heat-exchanged in the above-mentioned manner circulates from the back side to the front side in the cold storage chamber 1, whereby the goods (not shown) placed on the shelf 5 are cooled in a refrigerated state or a frozen state. You.

Since the cooling air heat-exchanged in the evaporator 6 is circulated from the back side to the front side in the cold storage chamber 1, the back surface of the glass plate 3a of the transparent door 3 is provided immediately after the heat exchange. Cold air does not come in contact. That is, since relatively warm air that has been deprived of refrigerated or frozen products comes into contact with the back surface of the glass plate 3a of the transparent door 3, the glass can be exposed even in an environment where the temperature and humidity of the outside air are high. Board 3
The temperature difference between the front surface side (outside air) and the back surface side (cooling room) of a can be reduced, and dew condensation on the surface of the glass plate 3a can be prevented.

Further, the area in which the evaporator 6 and the evaporator fan 7 are arranged is separated from the cold storage chamber 1 by a partition plate 8 provided therebelow, and the rear end of the partition plate 8 extends along the back of the cold storage chamber 1. Since the extending portion 8a is extended to form the passage 8b, the circulation path of the cooling air can be accurately formed.

Furthermore, since the warmest air immediately before the heat exchange comes into contact with the fluorescent lamp 9 in the cool room 1, measures are taken to prevent dew condensation on the fluorescent lamp 9, its mounting parts, the power supply circuit and the like. It is not necessary, and the structure of the same part can be simplified.

On the other hand, on the machine room 11 side, as indicated by solid arrows in FIG. 2, outside air is taken in from first and second intake ports 13b and 13c provided on the front and lower surfaces of the cover 13, and condensed. A portion of the warmed air that has been heat-exchanged by the heat exchanger 15 passes below the first duct plate 18a of the exhaust duct 18 and flows to the compressor 16 side. Is discharged to the outside through the exhaust port 12a.

At the same time, the other part of the heated air that has undergone heat exchange in the condenser 15 is taken into the exhaust duct 18, and the heated air flows from the front end opening of the exhaust duct 18 to the cover 13.
Is discharged upward through a second exhaust port 13d provided on the upper surface of the.

The cover 13 protrudes forward from the case 2 (cooling room 1) by the length of the cover 13 in the front-rear direction, and a part of a second exhaust port 13d provided on the upper surface thereof forms a frame 3b of the transparent door 3.
The second exhaust port 1
The warmed air discharged upward from 3d flows from the lower surface of the glass plate 3a of the transparent door 3 toward the upper portion, in combination with the fact that the warmed air has a characteristic that the heated air easily rises. The air contacts the entire surface of the glass plate 3a to prevent dew condensation.

Since the second exhaust port 13d and the outlet side of the condenser fan 15 are communicated by the exhaust duct 18, a sufficient amount of heated air for preventing dew condensation is supplied to the second exhaust port 13d. I can guide you.

Further, the region where the second exhaust port 13d is formed corresponds to the width of the glass plate 3a of the transparent door 3, and
Since a wind direction plate 18b2 is provided in the exhaust duct 18 to equalize the width of the heated air flowing in the exhaust duct 18 in the width direction, the heated air is uniformly discharged from the second exhaust port 13d. Warm air can be uniformly contacted with the surface of the glass plate 3a.

Further, by inclining the front bent portion 18b1 of the second duct plate 18b backward from the vertical, the discharge direction of the heated air discharged from the second exhaust port 13d can be changed by the transparent door 3. Since the control is performed in the direction toward the surface, the warmed air discharged upward from the second exhaust port 13d can be prevented from escaping forward.

Further, a horizontally long opening at the front end of the exhaust duct 18 is partitioned forward and backward by a fourth duct plate 18d.
Since the second exhaust port 13d is composed of a group of rectangular holes arranged in the width direction of the transparent door 3, a rectifying action can be given to the heated air exhausted from the second exhaust port 13d to prevent uneven discharge. .

[0033]

As described in detail above, according to the present invention,
By circulating the cooling air heat-exchanged in the evaporator at the upper part of the cold storage room from the back side of the cold storage room through the front side, it is possible to avoid the contact of the cold air immediately after the heat exchange with the rear surface of the transparent door, Thus, the temperature difference between the front side (outside air) and the back side (cooling room) of the transparent door can be reduced, and dew condensation on the surface of the transparent door can be appropriately prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a showcase according to the present invention.

FIG. 2 is a longitudinal sectional view of a showcase according to the present invention.

FIG. 3 is a perspective view showing a state in which a cover on the front of the machine room is removed according to the present invention.

FIG. 4 is a perspective view showing a state where an exhaust duct is drawn out of a machine room according to the present invention.

FIG. 5 is an exploded perspective view of an exhaust duct according to the present invention.

[Explanation of symbols]

1 ... cool room, 2 ... case, 3 ... transparent door, 4 ... prop, 5 ...
Shelf, 6 ... Evaporator, 7 ... Evaporator fan, 8 ... Partition plate,
8a: extension, 8b: vent, 9: fluorescent lamp, 10: billboard, 11: machine room, 12: case, 12a: first exhaust port, 12b: engagement hole, 13: cover, 13a ... hook,
13b: first intake port, 13c: second intake port, 13d
... second exhaust port, 14 ... condenser, 15 ... condenser fan, 16 ... compressor, 17 ... tank, 18 ... exhaust duct,
18a: first duct plate, 18a1: side plate, 18a2: rear plate, 18b: second duct plate, 18b1: front bent portion, 18b2: wind direction plate, 18b3: notch, 18c
... Third duct plate, 18d. Fourth duct plate, 18d1. Front bent portion, 18e. Fifth duct plate.

Claims (4)

[Claims] 1. An insulated room having a transparent door on the front,
In a showcase equipped with a machine room with a condenser and a condenser fan at the bottom, an evaporator is placed at the top of the cool room, and the cooling air exchanged by the evaporator is transferred from the back to the front of the cool room. A showcase characterized by having an evaporator fan circulating through the side. 2. An evaporator fan is disposed behind the evaporator in the cold storage room, and a partition plate is provided for partitioning a region where the evaporator and the evaporator fan are disposed from the cold storage room. The showcase according to 1. 3. The showcase according to claim 2, wherein a rear end of the partition plate extends downward along a back surface of the cool room, and a ventilation hole is formed in the extended portion. 4. The showcase according to claim 1, wherein an illuminating lamp is arranged in front of the evaporator in the cool room.