JPH0399182A - Refrigerator - Google Patents

Abstract

PURPOSE:To prevent a temperature rise an inner case of a refrigerating show- case by a method wherein in a part of return passage for cold air circulation an auxiliary cold air circulation passage is provided inside a partition defining an inner and outer cases. CONSTITUTION:Air from a cold air circulating fan 14 is cooled in a cooling chamber 12, returns to a fan 14 from a discharging opening 12a through passages 20, 28, 29 of a cold air circulation passage C between an inner case A and an outer case B and through returning passages 28', 20' and 306. The air circulates to refrigerates an inside part of a show-case within the inner case A. A passage 306 at a terminal end of the cold air circulation passage C is defined in respect to the outer case B by a partition plate 301. An auxiliary cold air circulation passage 305 is defined between the partition plate 301 and the inner case A, a part of the cold air got from a cooling chamber 12 is fed from an upper opening 304, passes through a cold air circulation passage C and then the air returns to the fan 14 together with the circulated cold air of which temperature is increased. In this way, it is possible to prevent a temperature within the inner case, i.e. the show-case from being increased.

Description

[Detailed Description of the Invention] a. Industrial Application Field The present invention relates to a refrigeration device, particularly a refrigerated showcase suitable for preserving and displaying fresh food, which is used for preserving and displaying sushi toppings in sushi restaurants, etc. This relates to a refrigeration device that can be used as a so-called refrigerated showcase.

b. Conventional technology Conventionally, such refrigeration equipment has installed a cooling pipe connected to a refrigeration circuit in a display chamber for storing and displaying items to be displayed, such as sushi toppings, and expands refrigerant sent from a compressor. The interior of the display room was directly cooled by passing the cooling pipe through the cooling pipe (for example, Japanese Patent Laid-Open No. 1983
(Refer to Publication No.-37665).

However, in such a refrigeration system, since the cooling pipes are arranged inside the display room, (1) the cooling pipes may get in the way when taking out and taking out items on display or cleaning the display room; (2) Because the refrigerant evaporates directly in the cooling pipe, moisture in the display room condenses and frost forms on the outer circumferential surface of the cooling pipe, accelerating the drying of the atmosphere in the display room, which is an adverse condition for display items. (3) If the operation is stopped, the above-mentioned frost will fall on the items on display, forcing continuous operation, which not only makes it difficult to adjust the temperature inside the refrigerator, but also makes it impossible to save electricity. (4) Since there is a temperature difference between the cooling pipe and the display room, airflow due to natural convection occurs, and when the displayed items are particularly fresh foods, the influence of the airflow may be reduced. There have been various problems such as the surface of fresh food becoming discolored due to exposure to heat.

Therefore, in order to solve these problems, we developed an inner box that accommodates the items to be displayed, an outer box that surrounds this inner box, and a cold air circulation passageway that is formed between this outer box and the inner box. A refrigeration system has already been proposed that consists of a cooler chamber disposed in this cold air circulation passage, a cooler placed in this cooler chamber and connected to a refrigeration circuit, and a cold air circulation fan (particularly Ganhei 1-51857), C. Problems to be Solved by the Invention In the refrigeration device proposed in Japanese Patent Application No. 1-51857, the cold air circulation passage circulates cold air only in one direction, and the cold air circulation passage is in contact with the return passage portion of the cold air circulation passage. There was a problem in that the temperature inside the inner box became high and the temperature distribution within the display room became uneven. The present invention has been made to solve these problems, and an object of the present invention is to provide the above-mentioned refrigeration device with uniform temperature distribution within the display room.

d. Means for Solving the Problems In order to achieve the above objects, the present invention provides an inner box for accommodating objects to be displayed, an outer box surrounding the inner box, and a structure formed between the outer box and the inner box. A refrigeration system comprising a cold air circulation passageway, a cooler chamber disposed in the cold air circulation passageway, a cooler arranged in the cooler chamber and connected to a refrigeration circuit, and a cold air circulation fan, A partition plate is installed on a part of the return path of the cold air circulation passageway to direct this return passage toward the outer box side, and an auxiliary cold air circulation passageway is defined at the inner box side of this partition plate. e. A part of the return path of the cold air circulation passage for the cold air circulating in one direction is defined on the outer box side, and an auxiliary cold air circulation passage is defined on the inner box side of that part to circulate new cold air. Therefore, cooling is performed also in the inner box, that is, in a portion corresponding to the return path of the cold air circulation path in the display room, and the temperature distribution in the display room can be made uniform.

f. EXAMPLE Hereinafter, an example of the present invention will be described with reference to a refrigeration system shown in the drawings.

The refrigeration equipment shown in the figure is generally called a refrigerated showcase, but in sushi restaurants, etc., it is also called a "neta case" because it stores and stores sushi toppings. be.

FIG. 1 is a perspective view of the front side of the refrigerated showcase of the present invention, where 1 is the refrigerated showcase, 2 is a display room, 3 is a refrigeration circuit machine room, and 4 is a side force bar. In addition,
34 is a top force bar into which the side force bars 4, 4 are fitted.

Figure 2 shows the back side of the refrigerated showcase 1, where 5 is a power cord, 6 is a ground wire, 7 is a drain pipe, 8 is a rear cover, 9 is a ventilation hole, 10 is a center frame, and 11 is a sliding door. . Note that S is an on/off switch for powering the refrigerated showcase 1.

FIG. 3 is a sectional view taken along a vertical cross section of the refrigerated showcase shown in FIG. A, an outer box B surrounding the inner box A, and a cold air circulation passage C formed between the inner box A and the outer box B.

As shown in FIG. 4, which shows a horizontal cross section of the refrigerated showroom shown in FIGS. 12
, electrical board 13, preferably supported by rubber feet 17! fil6, condenser fans 18a, 18b,
A condenser 19, a duct forming plate 33, etc. are provided. Inside the cooler chamber 12, there is a cold air circulation fan l4 and a cooler 15.
The cooler 15 is connected to a refrigeration circuit such as a compressor 16 and U and S units 19 through piping (not shown).

The cooler chamber 12 is partitioned into a cold air circulation fan side and a cooler side by a partition plate 64, and on the cooler side, a plurality of wind direction plates 32 are arranged radially near the outlet of the cold air circulation fan 14. All the air from the cold air circulation fan 14 is sent to the cooler 1.
The inner side of the end plates 307, 307 of No. 5, that is, the finned portions are oriented toward the inside. Note that 30 is a thermostat, and 31 is a temperature sensing part thereof.

As shown in FIGS. 3 and 5, the internal register A is connected to a bottom plate 23 fixed to the heat insulating structure 21 of the outer box B at intervals by supporting members 23a, 23a, and connected to this bottom plate 23 at the lower end. A pair of side plates 24, 24 extending upward, a top plate 36 connected to the upper ends of the pair of side plates 24, 24, the upper end supported by the top plate 36, and the lower end supported by the bottom plate 23, It consists of an inwardly opening windshield 39 whose left and right ends are engaged with a pair of side plates 24 and 24.

The outer iB includes a Wfr thermal structure 21 at the bottom, a pair of side frames 25, 25 connected to this insulation structure 2l at the lower end and extending upward, and this pair of side frames 25.25.
A top frame 35 is connected to the upper end, the upper end is supported by the top frame 35, and the lower end is connected to the heat insulating elliptical body 2.
It consists of an outer windshield 38 which is supported by a frame 1 and whose left and right ends are engaged with a pair of side frames 25. In addition, as shown in FIGS. 5 to 8, the outer windshield 38 is a double-glazed glass, and its lower end is connected to the heat insulating structure 2.
1 through a packing 37a, and its upper end is supported by a packing 37a at an end along the longitudinal direction of the totsua cover 34.
7b.

The cold air circulation passage C formed between the inner box A and the outer box B is
A passage 20 formed between the bottom plate 23 of the inner box A and the ltI7 structure 21 of the outer box B, and between the side frames 25, 25 having the side plates 24, 24 of the inner box A and the heat insulating material 26 of the outer box B. two passages formed between the top plate 36 of the inner box A and the top frame 35 of the outer box B, and further between the inner windshield 39 and the outer front glass 38. The passage 40 is formed by a passage 40.
The passage 29 passes through the space between the fixing members 42 provided at a distance to fix the top plate 36 to the top frame 36.
Also communicates with passage 28.2, although not shown.
It also carries 8'.

The passage 20 is connected to the machine room 3 through five seal members between the box-shaped heat insulating structures 21 and 21a such that the upper opening of the box-shaped heat insulating structure 21a coincides with the opening of the structure 21 of the outer box B.
It is communicated by a cooler chamber 2 disposed within the cooling chamber and its discharge opening 12a and suction opening 12b. Therefore, as shown by the arrow in FIG.
The air pumped by 4 returns from the discharge opening 12a of the cooler chamber 12 to the cooler chamber 12 via the passages 20, 28, 29 or 40, and 28 through the suction opening 12b and is circulated. There is. It should be noted that a ripening member 22 is filled or pasted on the back side of the bottom plate 23 forming the passage 20 from the upper part of the cooler chamber 12 of the passage 20 to the passage 28, and plays the role of heat insulation. In order to lower the height of the R machine room 3, two small-diameter condenser fans 18a and 18b are provided, with the air discharge side of one fan 18a facing the compressor 16, and the other fan 18b facing the machine room 3. The discharge direction is directed toward the front side of the front cover 52, that is, the opening of the front cover 52. Therefore, the air whose temperature has increased due to cooling of one condenser passes through the opening 51 of the front cover 52 and passes through the passage 50 defined by the air guide 44 into the fifth
It passes as shown by the arrow in the figure and flows along the outer surface of the outer fluorocarbon glass 38 to prevent the outer windshield 38 from fogging up.

As best seen in FIG. 5, the bottom plate 58 of the machine room 3 has two parallel legs 56 protruding from it, preferably through rubber pads 57.
is placed on a counter, etc. In addition, a heat insulating structure 2 consisting of a heat insulating material 27 at the bottom defining an outer box B of the display room 2
1 is inclined upward from the left side to the right side in FIG.
9 etc. are placed off to the right side where the height of the space is higher. Therefore, the height of the display room 2 is lower on the left side, that is, on the customer's side. Note that the bottom plate 23 of the inner box A is also inclined at a predetermined distance apart so as to define the passage 20 described above.

A groove portion 66 extending over the entire length of the refrigerated showcase 1 is formed at the lowered left end of the bottom plate 23, and a bottom plate is formed in this groove portion 66 so as to be substantially flush with the top surface of the bottom plate 23. 43 is removably disposed, and normally, a drainboard, ginsu, etc. are laid on the bottom plate 23 and the bottom plate 43. A drain port 45 is connected to the groove 66 through a sealing member 48. A drain hose 49 is connected to this drain port 45 via a connecting pipe 47, and this drain hose 49 communicates with the drain pipe 7. is fitted into an annular embossed portion 46 formed on the bottom plate 23 to be fixedly held.

Further, as shown in FIG. 5, a two-wooden rail portion 55 is formed at one end along the longitudinal direction of the top force bar 34 to receive the upper end of the sliding door 1l, and a rail portion 55 of two pieces of wood is formed at one end along the longitudinal direction of the top force bar 34. At the upper end, the lower end of the sliding door 11 is attached to a slider 54.
The sliding door 11 can be opened and closed to the left and right by the rails 53 and 55. The end of the bottom plate 23 is bent into an L-shape, and the lower ends of the three inner windshields are supported thereon via a packing 41a. Note that the upper ends of the three inner fross glasses are fitted with packing 4 on the top plate 36 and its fixing member 42.
Supported via lb.

In addition, in FIGS. 6 and 7, the reference numeral 60 indicates the cooler chamber 1.
Drainage pipe for draining water from 2, code 62 is compressor 1
The mounting plates for mounting 6 are shown respectively.

When assembling such a refrigerated showcase, the 9th
As shown in the figure, before assembling the outer box B including the outer windshield 38, side frame 25, Iifi material 26 and Zide cover 4, the inside It is necessary to support three windshields. The longitudinal dimension of the inner fluorocarbon I/glass 39 surrounding the packing 41 is the left and right side plates 24,
24, the upper left end of the side plate 24 is extended outward to the position shown by the dashed-dotted line (along the dashed-dotted line C), as shown by the arrow A, and the side plate 24 is extended outward from the inside windshield. After arranging the three pieces at predetermined positions, they are elastically held between the side plates 24. Therefore, the side plate 24
has the problem that if the rigidity is high, it is difficult to assemble the inner windshield 39, and if the rigidity is low, the sealing by the packing 41 is not sufficient. In order to solve this problem, as shown in FIG. 10 and FIG. At the same time, a reinforcing member 101 is placed on this mounting plate 102.
is attached with screws 103. This mounting plate 1
02 and the reinforcing member 101 are arranged such that their upper ends are directed toward the rounded portion 110 of the inner windshield 39.

Therefore, the reinforcing member 101 is present in the passage 28, and as shown in FIG.
It is divided into two parts as shown in E, and flows into two passages or 40. Note that the reinforcing member 101 is directly attached to the side plate 24.
It may be pasted on top.

Returning to FIGS. 3 and 5 again, a hood 302 is provided on the lower surface of the bottom plate 23 of the inner box A of the passage 20' constituting the return passage of the cold air circulation passage so as to partially block the return passage.
A partition plate 301 that defines the passage 20' into an inner box side and an outer box side is provided at the rear of 2, and one end of an auxiliary circulation passage 305 defined between the partition plate 301 and the inner box side is provided for cooling. It communicates with the upper opening 304 of the partition plate 64 that partitions the chamber 12, and the other end merges with the conventional return path 20' to form a passage 306.

The cold air leaving the discharge opening 12a of the cooler chamber 12 becomes considerably warm due to heat exchange in the cold air passages 28, 29 = i or 40, and may lose its cooling capacity in the display room on the return paths 28' and 20'. . If such cold air flows in contact with the inner box A, the inner box will not be cooled uniformly, and the distribution of occupancy within the display room 2 will vary, but in this example, the cooling capacity is lost. The returning cold air is passed through the passage 306 on the outer box side that does not come into contact with the inner box A, and is further passed through the cooler chamber 12.
Since fresh cold air can flow through the passage 305 on the inner box side that communicates with the upper opening 304 of the partition plate 64, the inside of the inner box A, that is, the display room 2, can be cooled extremely uniformly.

Note that the other end of the auxiliary circulation passage 305 can be independently guided to the suction opening 12b without merging with the passage 20', or new cold air can be guided to the other end of the auxiliary circulation passage 305 with a pipe and the partition plate 301 It is also possible to flow parallel to the returning cold air through the return route. Note that the partition plate 301 and the hood 302 can also be made integrally by providing an opening in the partition plate 301.

g. Effects of the Invention According to the present invention, in a refrigeration device in which a cold air circulation passage is formed between an inner box for storing items to be displayed, an outer box surrounding the inner box, and the outer box and the inner box, the cold air is removed. A partition plate is provided in a part of the return path of the circulation passage to define this return path on the outer box side,
Since the auxiliary cold air circulation passage is defined on the inner box side of this partition plate, the flow of cold air that is losing its cooling capacity will not come into contact with the inner box on the return path of the cold air circulation passage, and the inside of the inner box
In other words, it is possible to prevent the temperature inside the display room from rising, and because new cold air is passed through a part of the return path, the overall temperature balance is improved, and the inside of the display room can be cooled uniformly.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the refrigeration device according to the present invention seen from the front, FIG. 2 is a perspective view of the refrigeration device seen from the rear, and FIG. 3 is a sectional view taken along line I-I in FIG. 1. , FIG. 4 is a cross-sectional view taken along line 1 and 2 of FIG. 1, FIG. 5, 2, and 6. 7th
The figure and FIG. 8 are line 1 and IV-
1'/line, V-V line and ■1■ line, No. 9
1 is an exploded perspective view of a refrigeration apparatus according to the present invention, and FIGS. 10 and 11 are sectional views of essential parts of the refrigeration apparatus of FIG. 9. A...Inner box, B...Outer box, C...Cold air circulation passage, L...
Refrigerator, 2. Display room, 3. Machine room, 4. Side power bar, 7. Drain pipe, 9. Ventilation opening, 11. Sliding door, 12. Cooler room, 12a. Discharge opening. , 12b・
・Suction opening, 14...Cold air circulation fan, 15...Cooler, 16.Compressor, 18a, 18b...Condenser fan, 1...Condenser, 20, 28, 29, 40.28',
20'... passage, 21... heat insulation structure, 23... bottom plate,
24...Side plate, 25...Side frame, 35...I...
Tsupu frame, 36. Top plate, 38. Outside windshield, 39. Inner windshield, 64. Partition plate, 3.
01... Partition plate, 302 Hood, 303... Outside passage,
304...Top opening, 305...Auxiliary cold air circulation passage, 3
06 aisle, 307...End play I... Figure 6 Figure 10 Figure 1

Claims (1)

[Scope of Claims] An inner box for accommodating items to be displayed, an outer box surrounding the inner box, and a cold air circulation passageway formed between the outer box and the inner box;
In a refrigeration system comprising a cooler chamber disposed in the cold air circulation passage, a cooler placed in the cooler chamber and connected to a refrigeration circuit, and a cold air circulation fan, a return path of the cold air circulation passage is provided. A refrigeration device characterized in that a partition plate is provided in part of the partition plate to define the return path on the outer box side, and an auxiliary cold air circulation passage is defined on the inner box side of the partition plate.