JPH0678863B2 - Low temperature case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a low temperature case for cooling a storage chamber by forced circulation cold air.

(B) Conventional technology The showcase disclosed in Japanese Patent Application Laid-Open No. 63-172877 (F25D 23/00) has a storage room with a door on one side of the back and a shelf inside, and A cooling chamber formed directly below the chamber and equipped with an evaporator and a blower fan, a bottom plate also serving as a partition plate arranged at the boundary between the storage and cooling chambers, and along the rear edge of the bottom plate and along the door and back. A cold air outlet formed along the wall for supplying cold air in the cooling chamber to the storage chamber; and a cold air inlet formed along the front edge of the bottom plate for returning the cold air in the storage chamber to the cooling chamber. The cooling air that has undergone heat exchange in the evaporator is forcedly circulated through a cooling fan, a storage chamber, and a cooling chamber by a blower fan to cool the storage chamber.

(C) Problems to be Solved by the Invention According to the above-mentioned conventional technique, since the back surface of the storage room is closed by almost two doors, considering the space of the store as shown in FIG. Three showcases (1) (1-
1) If you install (1-2), showcase (1) (1
-1) butted against each other and overlapped with each other, and one of the doors (7) and (7) of the showcase (1) could not be opened. That is, although a part of the showcase (1) has a relationship that acts as a corner case, it cannot be practically used as a corner case.

The present invention aims to solve the above problems.

(D) Means for Solving the Problems As a means for solving the above problems, in the low temperature case of the present invention, a storage room having a door on one side of the back surface, a back wall on the other side, and a shelf inside is provided. , A cooling chamber formed immediately below this storage chamber and equipped with an evaporator and a blower fan, a bottom plate also serving as a partition plate disposed at the boundary between the storage and cooling chambers, and along the rear edge of this bottom plate and A cold air outlet formed along the door and the back wall for supplying cold air in the cooling chamber to the storage chamber, and a cold air suction port formed along the front edge of the bottom plate for returning the cold air in the storage chamber to the cooling chamber. And a configuration in which the amount of cold air blown out from a portion of the cold air outlet facing the door is larger than that of a portion facing the back wall.

(E) Action According to the above means, when the back wall which is in parallel with the transparent door is arranged on the back surface of the storage chamber, when two low temperature cases are installed in a row at a right angle in plan view. Since the other low temperature case overlaps the back wall, the other low temperature case does not overlap the transparent door, and a part of the low temperature case can be sufficiently used as a corner case, and the opening / closing operation of the transparent door becomes smooth.

Also, because the amount of cold air blown out at the portion facing the transparent door is larger than the portion facing the back wall at the outlet,
It is possible to reduce the amount of outside air entering the storage chamber when the door is opened, and improve the cooling effect immediately after the door is closed.On the other hand, the portion of the storage chamber facing the back wall can be less affected by the outside air when the door is opened. .

(F) Example An example of the present invention will be described below with reference to the drawings.
(1) is a closed type low temperature case suitable for cold storage of articles such as fresh confectionery, and includes a storage room (2), a cooling room (3) located immediately below this storage room, and directly below this cooling room. And the machine room (4) located at. The storage chamber (2) is arranged from the front surface to the upper surface and the right side surface, and the curved transparent plate (5) integrally formed with the right side wall (5A) and the frame (6) arranged on the back surface are slidable in the left-right direction. Two transparent fly doors (7) to be moved, and a back wall (8) which is made of a transparent plate such as glass and is erected on the back so as to be adjacent to the transparent door (7), and is arranged on the left side surface. A removable bottom plate (9A) (9B) that also serves as a partition plate, a shelf (10A) (10B), and a fluorescent lamp (11)
It is provided. The bottom plate (9A) (9B) is the storage,
It divides both cooling chambers (2) and (3) into upper and lower parts. A long and narrow air outlet (12) is formed along the rear edge and a long and narrow air inlet (13) is formed along the front edge. The storage and cooling chambers (2) and (3) communicate with each other. The bottom plate (9A) and the shelf (10A) face the two transparent doors (7), and the bottom plate (9B) and the shelf (10B) face the back wall (8). The cooling chamber (3) includes a curved transparent plate (5), a frame (6), which are components of the storage chamber (2),
A heat insulation wall (1) with an open top that supports and supports the back wall (8)
4), and the machine room (4) has the heat insulation wall (1
It is formed below 4). The heat insulating wall (14) has a drainage port (15) in the bottom wall, and constitutes a base (17) together with a metal base leg (16).

The opening (12A) of the blowout port (12) facing the transparent door (7) and opening upward has a larger opening area per unit area than the opening (12B) facing the back wall (8) and facing rearward. It is large and is designed to blow out a lot of cold air. The portion (12A) is opened upward so that cold air does not flow backward when the door is opened. The back wall (8)
Right side part (14B) of the heat insulation wall (14) facing the bottom plate (9)
B) and shelf (10B) are other low temperature cases (1
When -1) is installed side by side, it acts as a corner case, so that the right front corner of the shelf (10B) is an inclined side.

(20) and (21) are the first and the second arranged in the cooling chamber (3).
In both evaporators, the first evaporator (20) is inside and the second evaporator (2)
1) is vertically arranged with a partition plate (22) also serving as a dew receiving plate so as to be located on the outer side, and is arranged so as to be inclined low toward the drainage port (15). Both the first and second evaporators (20) (21)
Is a plate fin including a large number of plate-like fins (23) arranged in parallel at equal intervals, left and right tube plates (24), and a large number of refrigerant tubes (25) orthogonal to the fins and the tube plates. It is a form. Each fin (23) is coated with a coating (H) that enhances the water retention of the surface. Partition plate (2
2) forms an extension portion (26) having one end extended in front of the air inlet surfaces of the first and second evaporators (20) (21), that is, in the direction of a blower fan described later. This extension (2
6) is a paragraph (2) that stores the dew from the first evaporator (20).
7) and a plurality of small drain holes (28) for allowing the dew in this paragraph to drop downward. The drain hole (28) is preferably formed in a portion of the blower fan, which will be described later, where the wind pressure is weak.

(30) and (31) are always operated, and the cool air passing through the first and second evaporators (20) and (21) is cooled by the cooling chamber (3) -blowout port (12) -storage as shown by the arrow in FIG. Room (2) -Suction port (13)-
A pair of first and second blower fans for forced circulation with the cooling chamber (3), both of which are attached to a box-shaped fan case (33) having a partition plate (32) in the center. The number of the first and second blower fans (30) (31) increases as the length of the low temperature case (1), in other words, the length of the first and second evaporators (20) (21) increases. For example, if the lengths of the first and second evaporators (20) and (21) are for 6 shaku as shown in FIG. 3, two pairs are used. The rear edge of (34) has the front edge of the upper surface of the first evaporator (20) and the left and right tube plates (2) of the first and second evaporators (20) and (21).
A duct which is arranged so as to overlap the front edge of 4) and is fixed to the tube plates (24) with a fastener such as a screw. With this fastening, the first and second evaporators (20) ) (21) the air inlet surface and the extending portion (26) of the partition plate (22) are covered with this duct (34), while the inside of this duct is divided into the inside and outside, that is, the upper and lower sides by the extending portion (26). It is divided into a first air passage (35) facing the first evaporator (20) and a second air passage (36) facing the second evaporator (21). This duct (34) is connected to the evaporators (20) (2) from the first and second fans (30) (31).
To ensure that the cold air sent to 1) is spread over the entire width of both evaporators (20) (21),
As shown in Fig. 3, the first air passage (3
A first opening (37) facing the 5) and a second opening (38) facing the second air passage (36) are formed at appropriate places in the lower front half. Reference numeral (39) is a rotating tool such as a hinge for attaching the fan case (33) to the duct (34) so that the fan case (33) can rotate in the vertical direction, and the first blower fan (30) accompanying the attachment of the rotating tool.
Is the first opening (37), the first air passage (35) and the first evaporator (2
0), and the second blower fan (31) is connected to the outer route formed by the second opening (38), the second air passage (36) and the second evaporator (21). Correspondingly, the return cold air from the storage chamber (2) is sent to the corresponding evaporators (20) (21). When opened, the fan case (33) is placed on the upper surface of the duct (34) as shown in the left side of FIG. 3, and in this state, the first opening (37) or the second opening (38). While cleaning the upper surface of the extension part (26) or the upper surface of the bottom wall of the heat insulation wall (14) through the fan, sometimes the first and second blower fans (3
0) Maintenance of (31) is performed. The bottom plate (9) is removed when the fan case (33) is opened.

FIG. 4 shows the refrigerant circuit of the cooling device. The first and second evaporators (20) and (21) are connected in parallel with each other while the corresponding first and second expansion valves (40) ( 41) and the first and second solenoid valves (42) (43) are connected in series. (44) is a refrigerant compressor, (45) is a condenser, (46) is a liquid receiver, (47) is a dryer, and the first and second evaporators (20) (21), the first , Second
Both expansion valves (40) (41), first and second solenoid valves (42) (43)
Together form a cooling cycle. The refrigerant compressor (44) and the condenser (45) are arranged in the machine room (4).

According to such a configuration, since the back wall (8) is installed on the rear surface of the storage room (2) in parallel with the transparent door (7), two low temperature cases (1) (1) When -1) are installed in a row at a right angle in a plan view, the other low temperature case (1-1) overlaps the back wall (8), so that the other low temperature case (1) overlaps the transparent door (7). Therefore, a part of the low temperature case (1) can be fully used as a corner case, and the opening / closing operation of the transparent door (7) can be performed smoothly.

Moreover, since the amount of cool air blown out from the portion (12A) facing the transparent door (7) is larger than that of the portion (12B) facing the back wall (8) in the air outlet (12), the amount of cold air blown out is increased. It is possible to reduce the outside air entering the empty storage chamber (2) and improve the cooling effect immediately after the door is closed. On the other hand, a part of the storage chamber (2) facing the back wall (8) enters the outside air accompanying the opening door. Since it is less affected by and is stable in temperature, the stored products can be sufficiently cooled with a small amount of cold air blowing.

(G) Effects of the Invention According to the present invention described above, the effects listed are produced.

Because two rear low temperature cases are connected to each other at a right angle in plan view, the other low temperature case overlaps the rear wall due to the rear wall that is arranged in parallel with the transparent door on the back of the storage room. Since the transparent door does not overlap with another low temperature case, a part of the cold and warm case can be fully used as a corner case, and the opening and closing operation of the transparent door can be smoothly performed, so that stored goods can be put in and taken out smoothly.

Since the amount of cool air blown out from the air outlet at the part facing the transparent door is larger than that at the part facing the back wall, it is possible to reduce the amount of outside air entering the storage chamber when the door is opened and the cooling effect immediately after the door is closed. On the other hand, since the part of the storage room facing the back wall is stable with respect to temperature because it is less affected by the outside air that accompanies the opening of the door, it is possible to sufficiently cool the stored products with a small amount of cold air blowout, As a result, it is possible to form a cooling-dedicated area in the storage chamber that is hardly affected by the entry of outside air.

[Brief description of drawings]

1 to 7 show an embodiment of the low temperature case of the present invention,
1 is a sectional view taken along the line AA of FIG. 4, FIG. 2 is a sectional view taken along the line BB of FIG. 4, FIG. 3 is a sectional view taken along the line CC of FIG. 4, and FIG. 2 is an enlarged view of FIG. 2D, FIG. 6 is an overall perspective view of the evaporator, FIG. 7 is a refrigerant circuit, and FIG. 8 is a plan view of the prior art corresponding to FIG. (2) ... Storage room, (3) ... Cooling room, (7) ... Door, (8)
… Back wall, (9A) (9B)… Bottom plate, (10A) (10B)… Shelf,
(12) ... Blowout port, (12A) (12B) ... part, (13) ... Suction port, (20) (21) ... Evaporator, (30) (31) ... Blower fan.

Claims (1)

[Claims] 1. A storage room having a door on one side of a rear surface, a back wall on the other side, and a shelf inside, and formed directly below the storage room.
A cooling chamber provided with an evaporator and a blower fan, the storage, a bottom plate also serving as a partition plate arranged at the boundary between the cooling and cooling chambers, formed along the rear edge of the bottom plate and along the door and the back wall, A cold air outlet for supplying cold air of the cooling chamber to the storage chamber; and a cold air inlet formed along the front edge of the bottom plate for returning the cold air of the storage chamber to the cooling chamber, wherein the cold air outlet is A low temperature case in which the amount of cold air blown out from the portion facing the door is greater than the amount facing the back wall.