JPH0672733B2 - Case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a showcase having both refrigerating and warming zones.

(B) Conventional technology Recently, one showcase cools some of the products stored in a storage room such as a canned beverage and at the same time heats other products. There is. This combined storage increases during the winter when there is an increasing demand for heat retention of canned beverages. Showcases that employ this combined storage method are generally called hot and cold types.
As shown in Japanese Patent Publication No. 59-81475 (F25D11 / 02), a storage chamber is divided into upper and lower parts by a partition member having an elongated opening and an opening / closing member for opening and closing the opening so that the upper area is refrigerated and heated. When the upper and lower areas are used as a refrigerating area and the upper and lower areas are not used as a refrigerating area, the opening / closing member prevents cold air from entering from the lower area, which is a refrigerating area, while the heating element is an electric heater. Is energized and the upper area is heated to form a hot storage area. The temperature of this hot storage area is set in the range of 60 ° C to 70 ° C in consideration of the temperature at the time of drinking the canned beverage.

(C) Problems to be Solved by the Invention According to the above-mentioned conventional technique, when heating by the heating element,
Although warm air naturally convects in the hot storage area, the temperature of the upper portion of the hot storage area is higher than that of the lower portion due to the nature of the warm air, and the temperature distribution becomes uneven.

As a means to solve this problem, it is proposed to install a blower that circulates the warm air forcibly, but the blower motor is affected by the warm air in addition to self-heating, and the temperature of the winding rises abnormally, causing a burnout accident. A new problem that causes

(D) Means for Solving Problems In order to solve the above problems, the present invention is arranged in a heat insulating box (2) constituting a main body, and includes a cooler (14) and a blower fan (21). A partition plate (15) for partitioning the installed cold air passage (16) and the first storage chamber (17) that is cooled by the forced circulation cold air from this cold air passage, and the second storage that can be switched to both cold storage and hot storage areas. Forming a chamber (29), said first storage chamber (17)
An insulating partition box (23) that forms a back passage (34) for guiding the cool air from the cold air passage (16) between the partition plate (15) and the partition plate (15), and this insulating partition box And a storage part (77) formed on the back wall (28) of which the rear surface faces the back passage (34), and the motor (75) is stored in the storage part to store the air in the second storage chamber (29). Circulating blowers (73)
A directing plate (80) for directing cool air passing through the back passage (34) to the storage section (77), and a heater arranged in the second storage chamber (29) and energized during warming ( 68) and
A second damper (56) for guiding the cool air in the back passage (34) to the second storage chamber (29) during refrigeration and a second air for passing the cool air past the second storage chamber (29) to the first storage chamber (17) A showcase (1) having a damper (57) and having a larger flow rate of cold air in the back passage (34) during warming than during cold storage.

(E) Action According to the embodiment, when the first and second dampers (56) (57) are closed and the heater (68) is energized to make the second storage chamber (29) a storage area. The cold air supplied from the cool air passageway (16) to the back passageway (34) through the cold air blowout hole (20) is directed downward to the lower passageway (31), and the directivity plate (8
Due to 0), a part of the cool air bypasses the storage section (77) and cools the motor (75) of the blower (73). That is,
When the second storage room (29) is used as a hot storage area, the flow rate of the cool air passing through the back passage (34) is larger than that when the second storage room (29) is used as a cold storage area, so that it is directed to the storage section (77). Since the flow rate of the cool air increases, the cooling effect of the motor (75) which receives the radiant heat of the cover (78) which becomes high temperature due to the influence of the heater (68) in addition to self-heating can be further promoted.

(F) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

6 to 8, (1) is a showcase according to the present invention, (2) is a lower wall (2A), an upper wall (2B) and a back wall (2C).
And the heat-insulating box body that comprises the left and right side walls (2D) (2E) and constitutes the main body of the showcase (1), and (3), (4), and (5) are handles (3a), (4a), and Equipped with (5a),
A rotatable transparent door that opens and closes the right side, the lower left side, and the upper left side of the front opening (2a) that serves as a product storage and outlet for the heat insulating box (2), and (6) is the heat insulating box (2 ), The refrigerant compressor (7), the condenser (8),
And a machine room in which a condenser blower (9) and the like are arranged. A drainage port (10) is formed at the rear portion of the lower wall (2A) of the heat insulating box (2), and a drainage pipe (11) is connected to this drainage port. Further, (12) is a shade that also serves as a sign attached to the front end of the upper wall (2B) of the heat insulating box (2), and an elongated fluorescent lamp (13) is provided in this shade.
Further, a strut (22) that bisects the opening into two left and right sections is erected at approximately the center of the opening (2a), and between the substantial center of the strut and the substantially center of the left edge of the opening (2a). A partition member (22A) that further divides the left section into two parts is provided between them.

Further, (15) is a back wall (2C) and an upper wall (2) of the heat insulation box (2).
A partition plate provided at a distance from B), and the partition plate provides a cooler (14) and a cool air passage (16) in which a blower for circulating cool air described later is arranged, and the transparent door (3) (4). ), A first storage room (17) is defined as a dedicated refrigerating area. A top plate (15A) is provided in the upper right half of the partition plate (15), and the top plate extends forward with a space from the lower surface of the upper wall (2B), and its front end opens (2a). ) Is located above the inner side of the upper edge of the right section to form the first cold air outlet (18) along the right half of the upper edge of the opening (2a). A cold air suction port (19) is formed between the lower end of the partition plate (15) and the lower wall (2A) over the entire width thereof.
A top plate is not provided on the upper left half of the partition plate (15). In addition, the cool air outlet (20) is located above the partition plate (15).
Are formed. Reference numeral (21) is a blower fan for circulating cool air, which is arranged above the cool air passageway (16).
As shown in the figure and FIG. 7 arrows, the cool air that has been heat-exchanged by the cooler (14) is forcedly circulated to form an air curtain on the front surface of the first storage chamber (17), and the upper part of the partition plate (15). It is provided on the right side of the center.

The second storage (23) is disposed in the upper left part of the first storage chamber (17) in the heat insulation box (2), faces the transparent door (5), and serves as a refrigerating zone or a warming zone. This is a heat-insulating partition box that divides the room (29). This heat-insulating partition box is composed of upper and lower walls (24) (25), left and right side walls (26) (27) and back wall (28), and the front surface is transparent. The opening is opened and closed by the door (5). A lower surface plate (30) is provided below the lower wall (25) of the heat insulation partition box (23) from the substantially center of the left part of the partition plate (15) toward the partition member (22A). A lower passage (31) communicating with the cold air passage (16) is formed between the lower wall (25) of the heat insulating compartment (23). Further, the heat insulation partition box (23) is provided between the front end of the lower plate (30) and the partition member (22A).
A second cold air outlet (32) for blowing cold air from below is formed. Further, an upper passage (33) is formed between the upper wall (24) and the upper wall (2B) of the heat insulation box body (2), and further,
Between the back wall (28) and the partition plate (15), the lower passage (3
A back passage (34) communicating with 1) is formed, and an upper passage (33) which communicates with the cold air passage (16) and a cold air blowout hole (20) of a partition plate (15) to the back passage (34). ), The cold air in the cold air passage (16), which has become high pressure, is guided by the fan case (35).

Hereinafter, the heat insulation compartment box (23) will be described in detail with reference to FIGS. 1 to 5. The heat insulation compartment box (23) is composed of both inner and outer boxes (36) (37) and a foam heat insulating material (38) filled between the both boxes, the lower surface of which is the left side of the heat insulation box (2). The wall (2D), the partition plate (15), and the column (22) are supported by receiving members (39) provided respectively. An annular seal member (40) is provided on the entire circumference of the opening edge of the heat insulating compartment (23). The seal member (40) connects the front edges of the inner and outer boxes (36) (37) to each other and prevents the foam insulation of the foam heat insulating material (38) from leaking by foaming. And each of the rigid bases extends forward from both ends to form a heat insulating space (42) together with the base, the front surface of which is the front edge of the left side wall (2D) of the heat insulating box (2) and the column (22A).
And soft fin pieces (43) (43) in contact with the partition member (22B)
It consists of and. The fin pieces (43) (43) are not formed on the upper side of the seal member (40) in order to form a ventilation passage (44) in front of the seal member (40) in order to cool a fluorescent lamp described later. (45) is the upper wall (2) of the insulation compartment box (23)
In the hanging wall extending downward from the front end of 4), a heat insulating material (46) made of, for example, foamed polyethylene is provided directly below the upper side of the seal member (40) located in front of this hanging wall. Is a translucent cover (47) and an elongated fluorescent lamp (4) covered with this cover and illuminating the second storage chamber (23A).
8) is provided. The cover (47) has a hanging wall (4
It consists of a substantially L-shaped metal plate (47A) fixed to 5) and a translucent resin plate (47B) which is substantially L-shaped and detachably attached to this metal plate to form a shade. A heat insulating space (49) is formed around the fluorescent lamp (48) by a plate. Reference numeral (50) is an air passage formed at least in the vicinity of the end of the metal plate (47A), which communicates the upper passage (33) and the heat insulating space (49) with each other to cool the upper passage (33). Leads to adiabatic space (49). Since the cool air is guided to the heat insulating space (49) through the air passage (50) to cool the fluorescent lamp (48), the fin pieces (43) (43) are not provided on the upper side of the sealing member (40), and The length of the heat insulating material (46) is made shorter than the length of the cover (47) to form a cool air ventilation path (44). The heat insulating material (46) is provided to prevent dew condensation due to overcooling of the cover (47) due to cold air. The fluorescent lamp (48) is detachably supported by an elastic holder (51) fixed to the hanging wall (45).

(52) is a cover plate for covering the right side surface of the heat insulation compartment box (23),
This cover plate prevents cold air from leaking from the lower and rear passages (31) (34) to the first storage chamber (17). This cover plate (5
2) is an operation port (5
3) has been formed.

(54) and (55) open a part of the upper wall (24) and the lower wall (25) of the heat insulation compartment box (23), and the frame members (54
A) (55A), which is a cold air inlet and a cold air outlet that establish a communication relationship between the second storage chamber (23A) and the upper and lower passages (33) (31). Are U-shaped first and second dampers (56) provided in the frame members (54A) and (55A) and slidable in the front-rear direction.
It is opened and closed by (57). Grooves (58) are formed in the left and right directions on the upper and lower surfaces of the first and second dampers (56, 57), respectively. Reference numeral (60) is an operation bar that connects the first and second dampers (56, 57) to each other. This operation bar (60) is made by bending a metal rod into a U
1) (62) and side (63), both upper and lower sides (6
1) The disk-shaped fitting member (64A) (64A)
B) is fixed. Then, these fitting members are fitted into the grooves (58) of the first and second dampers (56) (57), respectively. The tips of the both sides (61) (62) are rotatably supported by the upper wall (24) or the lower wall (25) by pins (59) serving as fulcrums. The side (63) facing the right side wall (27) of the heat insulating compartment (23) and also serving as a handle extends vertically along the outer surface of the right side wall (27) of the heat insulating compartment (23). The center is supported by a guide rail (65) fixed to the right side wall (27). The guide rail (65) is formed with a sliding groove (66) for moving the operation bar (60) in the front-rear direction. Then, the support shaft (67) at the substantially center of the side of the operation bar (60) is passed through the sliding groove (66). The second damper (57) is provided with a magnet (M), and the lower surface of the lower wall (25) corresponding to the magnet (M) has the magnet (M) when the second damper (57) is closed. There is provided a reed switch (S) that is turned on by its magnetic force in the vicinity and is energized to a heater (68) composed of an electric heater arranged in the second storage chamber (29).

The opening / closing operation of the first and second dampers (56) (57) will now be described. The operation bar (60) is moved forward through the operation port (53) of the cover plate (52) as shown by the solid line in FIG. When moving to, the first and second dampers (56, 57) also move forward,
Both the cold air inlet (54) and the cold air outlet (55) are opened, and the cold air in the upper passage (33) accompanying this opening is cooled by the cold air inlet (5
4), second storage room (29), cold air outlet (55), lower passage (3
The second storage room (29) becomes a refrigerating area. or,
On the contrary, when the operation bar (60) is moved rearward to use the second storage room (29) as a warming area as shown by the dashed line in FIG. 5, the first and second dampers (56) (57) also moves rearward, the cold air inlet (54) and the cold air outlet (55) are both closed, and the supply of cold air from the upper passage (33) to the second storage chamber (29) is cut off. Then, at this time, the reed switch (S) is turned on to energize the heater (68), and the second storage chamber (29) becomes a storage area heated by the heater (68) with the energization.

Incidentally, (69) is a drawer type shelf provided in the second storage chamber (29).

(70) is a partition plate disposed in the second storage chamber (29) so as to be positioned directly below the heater (68), and (71) is behind this partition plate and directly below the cold air inlet (54). A fan case disposed in the second storage chamber (29) so as to be located at,
An air introduction path (72) is formed between both the partition plate (70) and the fan case (71) and the upper wall (24) and the back wall (28) of the heat insulating partition box (23). Reference numeral (73) is a blower for forcedly circulating the air in the second storage chamber (29) as shown by the chain line arrow in FIG. 1, and its propeller (74) is the fan case (71).
The motor (75) is disposed in the ventilation port (76) formed in the housing, while the motor (75) is penetrated through the back wall (28).
And is always operated regardless of the temperature of the second storage chamber (29), that is, even when the second storage chamber (29) becomes a refrigerating area or a hot storage area. The front opening of the storage part (77), that is, the surface on the second storage chamber (29) side is covered with a metal cover (78), and the back opening, that is, the surface on the back passage (34) side, has this back part. A metal directing plate (80) having a directing piece (79) for directing a part of the cool air passing through the passage into the storage part (77).
Is provided. Due to the arrangement of the direction plate (80), an inlet (81) is formed in the upper part of the rear opening of the storage part (77) and an outlet (82) is formed in the lower part, and the cool air is guided by the direction piece (79). After cooling the storage (77) from the inlet (81),
It returns from the outlet (82) to the back passage (34) and flows to the lower passage (31).

According to such a configuration, the first and second dampers (56) (57)
When the second storage chamber (29) is opened as a refrigerating area by opening the above, a part of the cold air supplied from the cool air passage (16) to the back passage (34) through the cold air outlet (20) is It is diverted and flows from the upper passage (33) through the cold air inlet (54) to the second storage chamber (2
9) After being guided into the cold air outlet (55), the lower passage (3
1) and merges with the cool air passing through the back passageway (34) to the first storage chamber (1) below the heat insulation compartment box (23) from the second outlet (32).
Blow out to 7). In this case, since the second storage chamber (29) serves as a refrigerating area and is supplied with cold air, the flow rate of cold air passing through the back passage (34) is reduced and the directivity plate (8
The amount of cold air introduced into the storage part (77) by the 0) is also small, but the heat generation of the motor (75) of the blower (73) itself is also small,
Moreover, since the motor (75) is directly or indirectly cooled by the cool air from both front and back surfaces of the storage section (77), the temperature rise of the winding of the motor (75) can be suppressed.

When the first and second dampers (56) (57) are closed and the heater (68) is energized to make the second storage chamber (29) a heating area, the cold air passage (16) is used. The cold air supplied to the back passage (34) through the cold air outlet (20) goes downwards to the lower passage (31) and a part of the cold air is stored in the storage portion (77) by the directing plate (80). This bypasses and cools the motor (75) of the blower (73). That is, the second storage room (2
When 9) is used as a hot storage area, the flow rate of cold air passing through the back passage (34) is larger than when it is used as a cold storage area, and this is the flow rate of cold air directed to the storage section (77). Therefore, the cooling effect of the motor (75) which receives the radiant heat of the cover (78) which becomes high temperature due to the influence of the heater (68) in addition to self-heating can be further promoted, and as a result, the winding of the motor (75) can be increased. The temperature rise can be suppressed and the accident of winding burnout can be avoided.

(G) Effect of the Invention According to the present invention described above, when the second storage chamber is the hot storage area, the flow rate of the cool air passing through the back passage is larger than that when the second storage chamber is the cold storage area. Since the flow rate of the cool air directed to the storage part also increases, the cooling effect of the motor, which receives the radiant heat of the cover which becomes high due to the effect of the heater in addition to self-heating, can be further promoted. It is possible to prevent rising and prevent burnout accidents and abnormal heating of the hot storage area.

[Brief description of drawings]

The drawings each show an embodiment of a showcase of the present invention.
The figure is a longitudinal sectional view of an essential part, FIG. 2 is a rear perspective view of an essential part, FIG. 3 is an overall front perspective view of a heat insulation compartment box, FIG. 4 is a vertical sectional view showing a second damper, and FIG. 5 is a heat insulation compartment. FIG. 6 is a perspective view showing the right side surface of the box, FIG. 6 is a sectional view taken along the line AA in FIG. 8, and FIG.
B sectional drawing and FIG. 8 are overall front perspective views. (2) ... Insulation box, (14) ... Cooler, (15) ... Partition plate, (16) ... Cold air passage, (17) ... First storage room,
(21) …… Blower fan, (23) …… Insulation compartment box, (28)
…… Back wall, (29) …… Second storage room, (34) …… Back passage, (56) …… First damper, (57) …… Second damper,
(68) …… heater, (73) …… blower, (75) …… motor, (77) …… storing unit, (80) …… directional plate.

Claims (1)

[Claims] 1. A partition plate which is arranged in a heat-insulating box constituting a main body and partitions a cool air passage in which a cooler and a blower fan are installed and a first storage chamber cooled by forced circulation cold air from the cold air passage, A second storage chamber that can be switched between cold storage and hot storage is formed, and a back passage that guides cool air from the cold air passage is formed between the partition storage plate and the second storage chamber that is arranged in the first storage chamber. A heat insulating partition box, a storage part formed on a back wall of the heat insulating partition box and having a back surface facing the back passage, a fan for storing a motor in the storage part and circulating air in the second storage chamber, A directing plate for directing the cool air passing through the back passage to the storage portion, a heater arranged in the second storage chamber, a first damper and a second storage chamber for guiding the cool air in the back passage to the second storage chamber. A second damper that sends cold air that has passed the first storage chamber to the first storage chamber Showcase comprising provided.