JPH071145B2 - Refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a refrigerating apparatus, particularly a refrigerating showcase suitable for storing and displaying fresh food, for example, for storing and displaying sushi items in a sushi store or the like. The present invention relates to a refrigerating device which is used as a refrigerating showcase called "net case".

b. Conventional technology Conventionally, such a refrigerating device is provided with a cooling pipe connected to a refrigeration circuit in a display room for accommodating and displaying an object to be displayed such as sushi material, and a refrigerant sent from a compressor. Was expanded and passed through this cooling pipe to directly cool the inside of the display room (for example, JP-A-62-3
(See Japanese Patent No. 7665).

However, in such a refrigerating apparatus, since the cooling pipe is arranged in the display room, (1) the cooling pipe becomes an obstacle when putting in or taking out the displayed object or cleaning the display room, (2) Since the refrigerant directly evaporates in the cooling pipe, moisture in the display room condenses and frost is formed on the outer peripheral surface of the cooling pipe, which creates a bad condition for the displayed object that the atmosphere in the display room dries. (3) When the operation is stopped, the above frost falls on the object to be displayed, forcing continuous operation, which makes it difficult to control the temperature in the refrigerator and saves electricity. ) Due to the temperature difference between the cooling pipes and the display room, airflow due to natural convection occurs, and when the displayed object is especially fresh food, it is affected by the airflow and the freshness is affected. Various problems that the surface of food is discolored There was.

Therefore, in order to solve such a problem, an inner box that houses the object to be displayed, an outer box that surrounds the inner box, and a cold air circulation passage formed between the outer box and the inner box. There has already been proposed a refrigerating device including a cooler chamber arranged in the cool air circulation passage, a cooler arranged in the cooler chamber and connected to a refrigeration circuit, and a cool air circulation fan. Two
-233966).

c. Problem to be Solved by the Invention In the refrigerating apparatus proposed in Japanese Patent Laid-Open No. 2-233966, the cold air circulation passage circulates the cold air only in one direction, and the return passage part of the cold air circulation passage is provided. There is a problem in that the temperature in the inner box in contact with the room becomes high and the temperature distribution in the display room becomes uneven.

The present invention has been made in order to solve such a problem, and an object thereof is to provide a refrigerating apparatus which can make the temperature distribution in the display room uniform and have a high cooling efficiency.

d. Means for Solving the Problems In order to achieve the above object, the present invention provides an inner box for housing an object to be displayed, an outer box surrounding the inner box, and a space between the outer box and the inner box. A cold air circulation passage, a cooler chamber arranged in the cold air circulation passage, a finned cooler arranged in the cooler chamber and connected to the refrigeration circuit, and a cool air circulation fan. In the refrigeration system, a guide is provided to guide all of the air from the outlet of the cool air circulation fan to the inside of the end plate of the finned cooler, and at least part of the air that has passed through this finned cooler is the end plate. A flow path is formed in contact with the outside of the cold air circulation passage, and this flow passage is connected to the return path of the cold air circulation passage.

e. Action The air that has passed through the finned cooler forms a passage that flows in contact with the outside of the end plate, and this passage is connected to the return passage of the cold air circulation passage. Supply is performed and the temperature distribution in the display room is corrected.

Note that heat exchange is also performed outside the end plate, that is, at the hairpin portion of the cooling pipe, and the heat exchange efficiency is significantly improved.

In addition, the outside of the end plate is a space that has not been conventionally used, and by using this space, it is possible to reduce the size and improve the cooling efficiency.

f. Examples Hereinafter, examples of the present invention will be described with reference to the refrigerating apparatus shown in the drawings.

The refrigerating device shown in the figure is generally called a refrigerating showcase, but in a sushi shop or the like, it is also called a "neta case" because it stores and stores sushi material. is there.

FIG. 1 is a front perspective view of a refrigerating showcase according to the present invention, in which 1 is a refrigerating showcase, 2 is a display room, 3 is a refrigeration circuit machine room, and 4 and 4 are side covers. 34
Is a top cover to which the side covers 4, 4 are fitted.

FIG. 2 shows the rear side of the refrigerated showcase 1, 5 is a power cord, 6 is a ground wire, 7 is a drain pipe, 8 is a rear cover, 9 is a vent, 10 is a center frame, and 11 is a sliding door. . In addition, S is an on / off switch of the power supply of the refrigerating showcase 1.

FIG. 3 is a cross-sectional view showing the refrigerated showcase shown in FIG. 1 along a vertical cross section. As shown in this figure, the display room 2 has an inner box for containing an object to be displayed. 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 showing the refrigerated showcase shown in FIGS. 3 and 1 along a horizontal cross section, a cooler surrounded by a box-shaped heat insulating structure 21a is provided in the machine room 3. A chamber 12, an electric board 13, a compressor 16 supported by a leg 17 preferably made of rubber, condenser fans 18a and 18b, a condenser 19, a duct forming plate 33 and the like are arranged. A cool air circulation fan 14 and a finned cooler 15 are arranged in the cooler chamber 12, and the finned cooler 15 is connected to a compressor 16 and a condenser by piping not shown.
It is connected to a refrigeration circuit such as 19.

The cooler chamber 12 is divided into a cool air circulation fan side and a finned cooler side by a partition plate 64, and on the cooler side, a plurality of wind direction plates, that is, guides, are provided in the vicinity of the outlet of the cool air circulation fan 14.
32 are arranged radially, and all the wind from the cool air circulation fan 14 is directed to the inside of the end plates 307, 307 of the finned cooler 15, that is, the finned portion. In addition, 30 is a thermostat and 31 is the temperature sensing part.

As shown in FIG. 3 and FIG. 5, the inner box A is connected to the heat insulating structure 21 of the outer box B with the bottom plate 23 fixed at intervals by the supporting members 23a, 23a, and is connected to the bottom plate 23 at the lower end. And 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, and an upper end supported by the top plate 36, and a lower end supported by the bottom plate 23, Both left and right ends are composed of a pair of side plates 24, and an inner windshield 39 engaged with the side plates 24, 24.

The outer box B is a bottom heat insulating structure 21, and a pair of side frames 25, 2 connected to the heat insulating structure 21 at the lower end and extending upward.
5, a top frame 35 connected to the upper ends of the pair of side frames 25, 25, the upper end is supported by the top frame 35, the lower end is supported by the heat insulating structure 21, and the left and right ends are a pair of side frames It consists of an outer windshield 38 engaged with 25. As shown in FIGS. 5 to 8, the outer windshield 38 is a double-layered glass, the lower end of which is supported by the end of the heat insulating structure 21 via the packing 37a, and the upper end of which is the top cover 34. It is supported via packing 37b at the end along the longitudinal direction.

The cold air circulation passage C formed between the inner box A and the outer box B is
Between the passage 20 formed between the inner box A, the bottom plate 23, and the heat insulating structure 21 of the outer box B, and between the side frames 25, 25 having both side plates 24, 24 of the inner box A and the heat insulating material 26 of the outer box B. Formed passage 28,28 '
And a passage 29 formed between the top plate 36 of the inner box A and the top frame 35 of the outer box B, and a passage 40 formed between the inner windshield 39 and the outer windshield 38,
The passage 40 communicates with the passage 29 through a space between fixing members 42 that are provided apart from each other to fix the top plate 36 to the top frame 35, and also with the passages 28 and 28 '(not shown). is doing.

The passage 20 is a box-shaped heat insulating structure 21a so that the upper opening thereof coincides with the opening of the heat insulating structure 21 of the outer box B.
The cooler chamber 12 disposed inside the machine chamber 3 is connected to the cooler chamber 12 via the seal member 59 between the first and the second ports 21a and the discharge opening 12a and the suction opening 12b. Therefore, as indicated by the arrow in FIG. 3, the air pumped by the cool air circulation fan 14 passes from the discharge opening 12a of the cooler chamber 12 through the passages 20, 28, 29 or 40, and 28. Cooler chamber 1 from suction opening 12b
It returns to 2 and is designed to circulate.

A heat insulating member 22 is filled or attached to the back surface 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 a role of heat insulation.

In order to reduce the height of the machine room 3, two small-diameter condenser fans 18a and 18b are provided, and the air discharge side of one fan 18a faces the compressor 16, and the other fan 18b is installed in the machine room 3. The discharge side is directed to the front side, that is, the opening of the front cover 52.
Therefore, the air used for cooling the condenser 19 and having an increased temperature passes through the opening 51 of the front cover 52, passes through the passage 50 defined by the air guide 44 as shown by the arrow in FIG. It flows along the outer surface of the glass 38 and prevents the outer windshield 38 from fogging.

As best understood from FIG. 5, two parallel legs 56 are projected on the bottom plate 58 of the machine room 3, and preferably the refrigerated showcase 1 is provided with a counter through a rubber pad 57. Placed on top of. In addition, the heat insulating structure 21 including the heat insulating material 27 at the bottom that defines the outer box B of the display room 2 is
The space in the machine room 3 is inclined upward from the left side to the right side in the figure, and the space on the right side is higher. The compressor 16 and the condenser 19, which require a relatively large space, have a high space. Is located on the right side, which is high. Therefore, the height of the display room 2 is lower on the left side, that is, on the customer side. The bottom plate 23 of the inner box A is also inclined at a predetermined distance so as to define the above-mentioned passage 20.

The bottom plate 23 is formed with a groove portion 66 at the lower left end portion extending over the entire length of the refrigerating showcase 1 in the longitudinal direction, and the floor plate 43 is formed in the groove portion 66 so as to be substantially flush with the upper surface of the bottom plate 23. Are detachably arranged, and usually, "slatboard", "ginsu" and the like are laid on the bottom plate 23 and the floor plate 43. A drain port 45 is formed in the groove 66 via a seal member 48, and a drain hose 49 is connected to the drain port 45 via a connection pipe 47. The drain hose 49 communicates with the drain pipe 7. ing. The seal member 48 has an opening, and this opening is fitted and fixed to an annular projecting portion 46 formed on the bottom plate 23.

Further, as shown in FIG. 5, one end along the longitudinal direction of the top cover 34 receives the upper end of the sliding door 11.
Two rail portions 55 are formed, and two rail portions 53 that receive the lower end of the sliding door 11 via a slider 54 are formed at the upper end of the rear cover 8 of the machine room 3. The sliding door 11 has a rail portion 53. It can be opened and closed to the left and right by using the 55. Bottom plate 2
The end of 3 is bent into an L shape, and the lower end of the inner windshield 39 is supported there by a packing 41a. The upper end of the inner windshield 39 is supported by the top plate 36 and its fixing member 42 via packing 41b.

6 and 7, reference numeral 60 denotes a drain pipe for draining water from the cooler chamber 12, and reference numeral 62 denotes a mounting plate for mounting the compressor 16.

When assembling such a refrigerated showcase,
As shown in the figure, both side plates 2 attached to the bottom plate 23 of the inner box A before the outer box B including the outer windshield 38, the side frame 25, the heat insulating material 26 and the side cover 4 are assembled.
It is necessary to hold the inner windshield 39 between 4 and 24. The longitudinal dimension of the inner windshield 39 surrounding the packing 41 is longer than the distance between the left and right side plates 24, 24. The outer windshield 39 is spread outward (along the dotted line C) to the position as shown in FIG. 2, the inner windshield 39 is placed at a predetermined position, and then elastically held by the side plate 24. Therefore, if the side plate 24 has high rigidity, it is difficult to assemble the inner windshield 39, and if the side plate 24 has low rigidity, the side plate 24 is packed.
There is a problem that the seal by 41 is not enough.
In order to solve this problem, as shown in FIGS. 10 and 11, the mounting plate 102 is fixed to the outer surface of the side plate 24 at a position lower than the above-mentioned dotted line c by means such as bonding. At the same time, the reinforcing member 101 is screwed on the mounting plate 102 with the screw 103.
It is installed by. The upper ends of the mounting plate 102 and the reinforcing member 101 are rounded portions 1 of the inner windshield 39.
It is arranged so that it points to 10.

Therefore, the reinforcing member 101 exists in the passage 28, and as shown in FIG. 9, the cool air from the passage 20 is divided into two as shown by arrows D and E, and flows into the passage 29 or 40. . The reinforcing member 101 may be directly attached to the side plate 24.

Returning to FIG. 3, FIG. 4 and FIG. 5 again, as described above, the cool air circulation fan 14 and the finned cooler 15 are arranged in the cooler chamber 12, and both of them are the partition plates 64. It is partitioned by. A plurality of radially arranged wind direction plates 32 are guides for guiding all the wind from the cool air circulation fan 14 and the fins of the finned cooler, and are provided with fins near the outlet of the cool air circulation fan 14 and fins. It is hermetically attached to the end plate 307 of the cooler 15.

The finned cooler 15 is fixed to the heat insulating structure 21a so as not to leave a gap between the finned cooler 15 and the bottom plate 23 of the inner box A, but as shown in FIG. A considerable gap is provided between the heat insulating structure 21a and the heat insulating structure 21a to form a passage 303. The passage 303 has an upper opening 304 provided in the partition plate 64.
Through, the cold air can be guided to the return path (28 ', 20') of the cold air circulation passage. In the example shown, return path 2
A partition plate 301 and a hood 302 are provided at 0 ', and an auxiliary cold air circulation passage is constituted by the passage 305 and the passage 306. By bringing fresh cold air into contact with the inner box A, the temperature distribution in the inner box, that is, in the display room. It helps to eliminate the unevenness.

An upper opening 304 is provided in a part of the partition plate 64, and a gutter-shaped partition plate matching the shape is provided, and new cold air is returned to the return path (20 ').
It is also possible to improve the temperature distribution in the display room by merging with and mixing with the chilled cold air whose cooling efficiency is lowered.

g. Effect of the Invention According to the present invention, a passage is formed in which the air passing through the fin portion of the finned cooler is further brought into contact with the outside of the end plate, and this passage is connected to the return passage of the cold air circulation passage. Therefore, new cold air is made to flow in the opposite direction, new cold air is supplied to the return path of the cold air circulation passage, and the deviation of the temperature distribution in the display room is corrected.

It should be noted that heat exchange is also performed outside the end plates, and the heat exchange efficiency, particularly the heat exchange efficiency per space, can be extremely improved.

[Brief description of drawings]

1 is a perspective view of the refrigerating apparatus according to the present invention as seen from the front side, FIG. 2 is a perspective view of the refrigerating apparatus as seen from the rear side, and FIG. 3 is a sectional view taken along the line I--I of FIG. FIG. 4 is a sectional view taken along line II-II of FIG. 1, and FIGS. 5, 6, 7, and 8 are lines III-III and IV-IV of FIG. 4, respectively.
FIG. 9 is an exploded perspective view of the refrigerating apparatus according to the present invention, FIG. 10 and FIG. 11 are sectional views taken along the lines V-V and VI-VI.
The figure is a sectional view of the essential parts of the refrigerating apparatus of FIG. A: inner box, B: outer box, C: cold air circulation passage, 1 ...
Refrigerator, 2 ... Display room, 3 ... Machine room, 4 ... Side cover, 7 ... Drain pipe, 9 ... Ventilation port, 11 ... Sliding door, 12 ... Cooler room, 12a ... Discharge opening , 12b ... Suction opening, 14 ... Cool air circulation fan, 15 ... Finned cooler,
16 ... Compressor, 18a, 18b ... Condenser fan, 19 ... Condenser, 20,28,29,40,28 ', 20' ... Passage, 21 ... Insulation structure, 23 ... Bottom plate, 24 …… side plate, 25 …… side frame, 35 …… top frame, 36 …… top plate, 38 …… outside windshield, 39 …… inside windshield, 64 …… dividing plate, 301 …… dividing plate, 302 …… Hood, 303 …… Outside passage, 304 …… Top opening, 305 …… Auxiliary cool air circulation passage, 306
... passage, 307 ... end plate.

Claims (1)

[Claims] 1. An inner box (A) for accommodating an object to be displayed, an outer box (B) surrounding the inner box (A), and a space between the outer box (B) and the inner box (A). The formed cold air circulation passage (C) and the cooler chamber (12) arranged in the cold air circulation passage (C),
In the refrigerating device (1), which comprises a finned cooler (15) connected to the refrigeration circuit and arranged in the cooler chamber (12), the cold air circulation fan (1) 14) The end plate (307) of the finned cooler (15) is supplied with all of the air from the outlet.
A guide (32) for guiding the inside of the end plate (307) is provided, and at least part of the air passing through the finned cooler (15) flows in contact with the outside of the end plate (307).
03) is formed, and the passage (303) is communicated with the return passages (20 ', 28') of the cold air circulation passage (C).