JPH0680385B2 - Showcase - Google Patents

Description

The present invention relates to a showcase provided with a precooling chamber in a machine room.

(B) Conventional Technology In Japanese Patent Laid-Open No. 60-218566 and Japanese Patent Laid-Open No. 60-218572,
A storage room that is cooled by a low temperature air curtain formed in the opening, and is cooled by return cold air that is formed immediately below this storage room and that forms the low temperature air curtain and that returns to the evaporator disposed behind the storage room. , A stock chamber with a lid on the front side that stores the drawer freely, and a cold air that is arranged above the front part of the stock chamber and that returns the cool air to the cool air flowing along the back surface of the bottom plate of the storage room Disclosed is a configuration of a low temperature showcase that is provided with a cool air for cooling the stock products and an airflow diverter for diverting the stock products.When replenishing the products in the storage room, the drawer is pulled out from the stock room and stored. Work to move to the room is performed.

(C) Problem to be Solved by the Invention In the above-mentioned conventional technology, when replenishing merchandise, the drawer is drawn out to the passage through which the customer passes, so when the customer is crowded, the drawer is drawn out from the relationship that interferes with the customer. In order to cool the stock room with the return cold air that has passed through the opening, the products in the stock room have a higher temperature than the products in the storage room and a large amount of dust adheres. There was a problem of becoming unsanitary when stocking products that were not available.

The present invention aims to solve the above problems.

(D) Means for Solving the Problem As a means for solving the above problems, the present invention is arranged in a machine chamber, an upper wall portion thereof is separated from a bottom wall of a cooling chamber, and one side is open toward the outside. A heat-insulating box defining a pre-cooling chamber, a drawer that can be stored in and out of the heat-insulating box, the bottom wall and the heat-insulating wall, one end faces the air outlet side of the evaporator, and the other end is the A cold air supply pipe facing the opening side of the precooling chamber, a cold air return pipe penetrating the bottom wall and the heat insulating wall, one end facing the air inlet side of the evaporator, and the other end facing the inner part of the precooling chamber. The configuration provided was adopted.

(E) Action According to the above means, a part of the cool air immediately after heat exchange in the evaporator is supplied to the vicinity of the front of the pre-cooling chamber through the cold-air supply pipe, then traverses the upper part of the pre-cooling chamber and returns to the cool air from the inner part. As it returns to the cooling room through the pipe, cold air with low temperature and low humidity is constantly supplied to the precooling room, and as a result, the product stored in the drawer of the precooling room is the same as the product stored in the storage room. Or, the temperature will be slightly lower, the cooling effect will be better, and the cool air from the cool air supply pipe will be supplied to the vicinity of the front of the pre-cooling chamber, so the cool air will be supplied into the container even when the drawer is pulled out, and the temperature of the product will rise. Can be suppressed. In addition, since both the cold air supply pipe and the cold air return pipe are exposed to the inside of the machine room, the exposed portion surface is maintained above the dew point due to heat radiation from the compressor and condenser, and as a result, dew condensation on the surface occurs. It can be prevented.

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings.
(1) shown in FIGS. 6 to 6 is a low-temperature showcase of a face-to-face sales type suitable for cold-preserving articles such as fresh confectionery. It is a storage room (2) and a cooling located just below this storage room. The chamber (3) and the machine room (4) located directly below the cooling chamber constitute the main body. The storage chamber (2) has two curved transparent plates (5) arranged from the front surface to the upper surface, and a plurality of transparent doors slidable in the left-right direction inside a frame (6) arranged on the back surface. (7) and a pair of transparent side plates (8) arranged on both left and right side surfaces, respectively, and inside the pair of front and rear bottom plates (9A) (9B), which are detachable pairs and also serve as partition plates. A product placing plate (10) arranged above, a front face of the product placing plate, a transparent vertical plate (11) surrounding both left and right sides, and a fluorescent lamp (L) are provided. The bottom plates (9A) and (9B) partition the storage and cooling chambers (2) and (3) into upper and lower parts, and are arranged in a staggered manner so that they can slide in the front-rear direction. A blowout port (12) is formed along the rear edge, and a suction port (13) is formed along the front edge of the front bottom plate (9A), and the storage and cooling chambers (2) (3) are passed through the blowout and suction ports. It is configured to communicate. The cooling chamber (3) is composed of a heat insulating wall (14) having an open upper surface on which the storage chamber (2) is placed and supported, and the machine chamber (4).
Is formed below the heat insulating wall (14). The heat insulating wall (14) has a drain port (15) in the bottom wall (14A), and constitutes a base (17) having a front wall (17A) together with a metal base leg (16).

(20) and (21) are first and second evaporators arranged in the cooling chamber (3) and alternately cooled for a predetermined period of time. The first evaporator (20) is the inner side and the second evaporator is the second evaporator. The metal plate (22) also serves as a dew receiving plate so that the (21) is located on the outer side, and the metal partition plate (22) overlaps the upper and lower sides of the metal plate, and the (21) is arranged so as to be inclined slightly toward the drain port (15). The first and second evaporators (20) (21) each have a large number of plate fins (23) arranged in parallel at equal intervals as shown in FIG.
The plate fin shape is composed of the left and right tube plates (24) and a large number of refrigerant tubes (25) orthogonal to the fins and the tube plates. The partition plate (22) is provided with one end of the partition plate (22).
An extension portion (26) extending in front of the air inlet surfaces of the second evaporators (20) and (21), that is, in the direction of the blower fan described later, is formed. The extension (26) is provided with a paragraph (27) for storing dew from the first evaporator (20) and a plurality of small drain holes (28) for dropping the dew from this paragraph downward. There is. 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 that form an air curtain on the product placing plate (10) by forced circulation with the cooling chamber (3), and as shown in FIG. Both are mounted in a box-shaped fan case (33) equipped with 32). The first and the second blower fans (30) (31) are longer when the length of the low temperature showcase (1), in other words, the length of the first and second evaporators (20) (21) is longer. If the number is increased, for example, as shown in FIG. 7, if the lengths of the first and second evaporators (20) and (21) are for 6 shaku, two pairs are used. (34) is arranged so that the trailing edge overlaps the leading edge of the upper surface of the first evaporator (20) and the leading edges of the left and right tube plates (24) of the first and second evaporators (20) (21). And a duct that is fixed to the tube plates (24) with a fastener such as a screw, and the air inlet surfaces and the partitions of the first and second evaporators (20) (21) accompanying the fixing. The extending portion (26) of the plate (22) is covered with the duct (34), while the inside of the duct is divided into the inside and outside, that is, the upper and lower sides by the extending portion (26) and faces the first evaporator (20). It is divided into a first air passage (35) and a second air passage (36) facing the second evaporator (21). In this duct (34), the cool air sent from the first and second fans (30) (31) to the corresponding evaporators (20) (21) is spread over the entire width of both evaporators (20) (21). It is intended to be diffused.
As shown in the figure, the first opening (37) facing the first air passage (35)
However, second openings (38) facing the second air passages (36) are formed at appropriate places in the lower half of the front surface. Reference numeral (39) is a rotating tool such as a hinge for attaching the fan case (33) to the duct (34) so as to be rotatable in the vertical direction. It corresponds to the inner route formed by the opening (37), the first air passage (35) and the first evaporator (20), and the second blower fan (31) has the second opening (3).
8), which corresponds to the outer route formed by the second air passage (36) and the second evaporator (31), and the storage chamber (2) for the corresponding evaporator (20) (21), respectively. Send back cold air from. When the fan case (33) is opened, it is placed on the upper surface of the duct (34) as shown on the left side in FIG. 7, and in this state, the first opening (37) or the second opening (38). ) Is used to clean the upper surface of the extension portion (26) or the upper surface of the bottom wall (14A) of the heat insulation wall (14), while occasionally the first and second blower fans (30) (31). Maintenance and inspection will be performed.

Reference numeral (40) shown in FIG. 8 is a pair of left and right rail devices that can freely pull out the product placing plate (10).
And a first movable rail (42) and a second movable rail (43), and the first movable rail (42) has an I-shaped cross section.
By fitting the fixed rail (41) and the second movable rail (43) into the fixed rail (41) via the ball bearing (44), the first movable rail (42) can be drawn out from the fixed rail (41). The second movable rail (43) is supported with respect to the first movable rail (42) so as to be freely drawn out, and as shown in FIG. 9, a total withdrawal stroke (M) necessary for withdrawing the product placing plate (10) can be obtained. . The first and second movable rails (42)
Although not shown, (43) is provided with a stopper for restricting each withdrawal stroke.

(45) is a pair of left and right mounting plates provided on the lower surface of the left and right side edges of the product placing plate (10).
Outside the movable rail (42), a rising plate (46), a wind direction plate (47), and a heat insulating door (48) are sequentially mounted along the rear edge of the product placing plate (10), and the product placing plate ( With the drawing of 10), it is structured to be drawn out to the outside as shown by the chain line in Fig. 1. In such a state, the cool air at the outlet (12) is forward along the back surface of the product placing plate (10). Follow the path that flows to. The rising board (4
6) is made of transparent glass or transparent resin, and forms a rectangular frame that surrounds the product placing plate (10) together with the vertical plate (11) and a ventilation path (47) between the wind direction plate (47). 49) to form. The air passage (49) acts as a cold air supply passage when the product placing plate (10) is housed in the storage chamber (2) and overlaps directly above the air outlet (12) as shown in FIG. The height of the product is substantially raised so that the products placed on the product placing plate (10) do not come into direct contact with the cold air forming the air curtain.

At the upper end of the wind direction plate (47), a directional side (50) is formed which is inclined forward and downward. This directing side (50) directs the cool air forward, and the ceiling wall (14B) of the heat insulating wall (14) and the heat insulating door (48) are directly cooled by the supplied cold air, and this direct cooling is accompanied by Condensation on the surface of the wall (14B) and heat insulation door (48) is prevented. The adiabatic door (48) is formed on the back wall (14C) of the adiabatic wall (14) so as to openably and closably close the opening (51) serving as an entrance / exit for the product placing plate (10). An annular gasket (52) is attached around the inner surface. When the gasket (52) hits the back wall (14C) and the opening (51) is closed by the heat insulating door (48),
The product placing plate (10) is housed at a predetermined position in the storage chamber (2), the air outlet (12) and the ventilation passage (49) are in communication with each other, and the air is also vented just above the suction port (13). A path (53) is formed. (56) is an article placing table arranged in front of the storage room (2), on which the bag of the customer who purchases the item may be placed, or the item which does not require cooling may be displayed. good. Reference numeral (57) is a gas or coil spring type opening / closing device arranged in a frame (6) supporting the transparent door (7), and the transparent plate (5) is provided via a pair of movable plates (58) which are vertically paired. ) Is pivotally supported in the vertical direction, and the transparent plate (5) is lifted upward as shown by the broken line in FIG.
Open the front of the.

Reference numeral (60) is a heat insulating box disposed in a part of the machine room (4) and defines a pre-cooling room (61) having one side surface opened to the back surface of the machine room (4). In this heat insulation box (60), the front wall (62) is the front wall (17A) of the base, and the upper wall (63) is the heat insulation wall (1).
There is a predetermined space that becomes a warm air flow path apart from the bottom wall (14A) of 4). Reference numeral (64) is a drawer which is arranged to be freely inserted into and removed from the precooling chamber (61), and includes a container (65), a lid (66), and a pair of elongated left and right rails (also serving as connecting members connecting the container and the lid). 67) consists of The rail (67) is slidably supported by a pair of left and right tracks (69) arranged on the inner surfaces of the left and right side walls (68, 68) of the heat insulation box (60).

(70) is a pre-cooling chamber (61) for a part of the cold air in the cooling chamber (3)
A cold air supply pipe that passes through the bottom wall (14A) and the upper wall portion (63), and has one end facing the air outlet side of the evaporator (20) (21) and the other end of the precooling chamber ( It faces the opening side of 61), that is, near the frontage. (71) is the cold air supply pipe (70)
A cold air return pipe for returning the cold air supplied from the pre-cooling chamber (61) to the cooling chamber (3), the bottom wall (14A) and the front wall portion (6).
2), one end faces the air inlet side of the blower fans (30) (31) and the evaporators (20) (21), and the other end faces the inner part of the precooling chamber (61).

(72) is an intake port formed on the left side of the back of the machine room (4), and (73) is an exhaust port formed on the right side of the back of the machine room (4), which faces the suction port (72). The compressor (74), the condenser (75), and the blower fan (76) are arranged in the machine room (4), and the air taken in through the suction port (72) is the condenser (75) and the compressor. It becomes warm air through (74), flows along the peripheral surface of the heat insulation box (60) and the cold air supply and return pipes (70) (71), and is then discharged to the outside from the exhaust port (73). .

According to such a configuration, a part of the cold air immediately after the heat exchange in the evaporator (20) (21) is supplied to the vicinity of the frontage of the precooling chamber (61) through the cold air supply pipe (70), and then the precooling is performed. Passing through the upper part of the chamber (61), passing through the cold air return pipe (71) from the back, the cooling chamber (3)
As a result, cold air with low temperature and low humidity is constantly supplied to the pre-cooling room (61), and as a result, the products stored in the drawer (64) of the pre-cooling room (61) are stored in the storage room (2). The temperature is the same as or slightly lower than that of the stored products, the cooling effect is good, and the cold air from the cold air supply pipe (70) is supplied near the front opening of the pre-cooling chamber (61) so that it can be withdrawn (64).
Cold air is supplied to the container (65) even when the
The temperature rise of the product can be suppressed.

The cold air supply pipe (70) and the cold air return pipe (71) are both
Since the parts are exposed in the machine room (4), the compressor (7
4) The heat of the condenser (75) keeps the exposed surface above the dew point, and as a result, prevents dew condensation on the surface.

(G) Effects of the Invention According to the present invention, the effects listed below occur.

Cold air with low temperature and low humidity is constantly supplied to the pre-cooling chamber through the cold air supply pipe, and as a result, the product stored in the drawer of the pre-cooling chamber has the same or slightly lower temperature as the product stored in the storage chamber. The cooling effect is good, and moreover, since the cool air from the cool air supply pipe is supplied to the vicinity of the front of the pre-cooling chamber, the cool air is supplied into the container even when the drawer is pulled out, and the temperature rise of the product can be suppressed.

Since part of both the cold air supply pipe and the cold air return pipe is exposed to the warm air passage in the machine room, the exposed portion surface is maintained above the dew point by heat radiation from the compressor and the condenser, and as a result, to the surface. Condensation can be prevented.

[Brief description of drawings]

The drawings each show an embodiment of a showcase of the present invention.
4 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 an overall perspective view of the heat insulation box, FIG. 4 is an overall front perspective view, and FIG. A perspective view, FIG. 6 is a front perspective view of the whole opening door, FIG. 7 is a whole perspective view of the evaporator, and FIG.
FIG. 9 is a cross-sectional view taken along the line CC and FIG. 9 is a side view showing a state in which the rail device is pulled out. (2) ... storage room, (3) ... cooling room, (4) ... machine room, (20) (21) ... evaporator, (30) (31) ... blower fan, (60) ... … Insulation box, (61) …… Pre-cooling room, (63)…
… Upper wall, (64) …… Drawer, (70) …… Cold air supply pipe,
(71) …… Cold air return pipe, (74) …… Compressor, (75) ……
Condenser.

Claims (1)

[Claims] 1. A storage chamber, a cooling chamber directly below the storage chamber, in which an evaporator and a blower fan are arranged, and a cooling chamber directly below the cooling chamber, in which a compressor, a condenser, etc. are arranged. In a showcase consisting of a machine room, a heat insulating box which is arranged in the machine room, an upper wall portion of which is separated from a bottom wall of the cooling chamber, and a side of which is a pre-cooling room which opens to the outside, and the heat insulating box. A drawer that can be stored in and taken out from the inside, penetrates the bottom wall and the heat insulating wall, and one end faces the air outlet side of the evaporator,
A cold air supply pipe whose other end faces the opening side of the precooling chamber, and the bottom wall and the heat insulating wall, one end of which faces the air inlet side of the evaporator, and the other end of which faces the inner part of the precooling chamber. A showcase equipped with a return pipe.