JPH0399183A - Refrigerator - Google Patents

Abstract

PURPOSE:To facilitate supplying of new cold air to a return passage of a cold air circulating passage and improve a heat exchanging efficiency by a method wherein air passes through fins of a finned cooling device is allowed to flow in contact with an outer side of an end plate and a flow passage for the air is provided. CONSTITUTION:Air from a cold air circulating fan 14 is cooled by a finned cooling device 15 within a cooling chamber 12, passes through passages 20, 28, 29, 28' and 20' in a cold air circulating passage C defined between an inner box A and an outer box B from a discharging port 12a. Then the air is circulated there. A part of the cold air cooled by the cooling device 15 flows in a passage arranged to be contacted with an outside part of an end plate 307 in an opposite direction, passes from an upper opening 304 through an auxiliary cold air circulating passage 305 between the inner box A and a partition plate 301. The air is mixed with the returned cold air from a returning passage 20', passes in a passage 306 and the air is returned back to a fan 14. In this way, it is possible to make a uniform cold air temperature distribution within the inner box A. Further, it is possible to perform a heat exchanging operation even at an outside part of the end plate and to improve a heat exchanging efficiency.

Description

[Detailed Description of the Invention] a. INDUSTRIAL APPLICATION FIELD This invention relates to a refrigeration device, particularly a refrigerated showcase suitable for preserving and displaying fresh food, which is used for storing and displaying sushi toppings in, for example, sushi restaurants. This relates to a refrigeration device called a refrigeration device that can be used as a 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 it through the cooling pipe.
2-37665).

However, in such a refrigeration system, since the cooling vibrator is placed inside the display room, (1) the cooling pipe becomes an obstacle when taking out and taking out items on display or when cleaning the display room; <2> Since 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, causing the atmosphere inside the display room to become dry, which is bad for the displayed items: 2! (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 affected. There were various problems such as the surface of fresh food becoming discolored due to exposure to water.

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 Ganpei No. 151857).

C. The problem that the invention is trying to solve! - In the refrigeration device proposed in No. 51857, the cold air circulation passage circulates cold air only in one direction, and the temperature inside the inner box that is in contact with the return passage of the cold air circulation passage becomes high, causing the temperature inside the display room to rise. There was a problem that the temperature distribution became non-uniform.

The present invention has been made to solve these problems, and aims to provide a refrigeration device that can uniformize the temperature distribution within a display room and has good cooling efficiency.

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 consisting of a cold air circulation passageway, a cooler chamber disposed in the cold air circulation passageway, a finned cooler arranged in the cooler chamber and connected to a refrigeration circuit, and a cold air circulation fan. A guide is provided to guide all of the air from the outlet of the cold air ring fan to the inside of the end plate of the fin cooler, and at least a part of the air that has passed through the fin cooler is This is a formal precept for the passageway that flows in contact with the outside of the area.

e. Air that has passed through the cooler with working fins forms a passageway through which it flows in contact with the outside of the end plate, making it easy to supply new cold air to the return route of the cold air circulation passageway, preventing uneven temperature distribution within the display room. In addition to being easy to correct, heat exchange is also performed outside the end plate, that is, at the hairpin part of the cooling pipe, and the efficiency of heat exchange is greatly improved.

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

f. DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will now be described with reference to the refrigeration system shown in the drawings.

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

FIG. 1 is a front perspective view of the refrigerated showcase of the present invention, where 1 is the refrigerated showcase, 2 is the display room, 3 is the refrigeration circuit v1 machine room, and 4.4 is the side power bar. Note that 34 is a top force bar into which the side force bar 44 is 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 refrigerator jaw case 1. FIG. 3 is a sectional view taken along a vertical cross section of the refrigerated showcase shown in FIG. A and the outside surrounding this inner box A? N B and
It consists of a cold air circulation passage C formed between an inner box A and an outer box B.

As shown in FIG. 4, which shows the refrigerated showcase shown in FIGS. 3 and 1 along a horizontal cross section, the FI machine room 3
Inside, there is a cooling chamber 1 surrounded by a box-shaped heat insulating structure 21a.
2, electrical equipment board 13, preferably gol. A compressor 16 supported by legs 17 made of a condenser, a condenser fan 18a. 18b.
A condenser 19, a duct forming plate 33, etc. are provided. Inside the cooler chamber 12, a cold air circulation fan 14 and a fin f-sized cooler 15 are arranged, and the finned cooler 15 is connected to a refrigeration circuit such as a compressor 16 and a condenser 19 through piping (not shown). There is.

The cooler chamber l2 is partitioned by a partition plate 64 into a cold air circulation fan side and a cooler side, 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 directed inside the end plates 307, 307 of the finned cooler 15, that is, toward the 10 fins. Note that 30 indicates the thermostats 1 to 3, and 3l indicates the temperature sensing portion thereof.

As shown in FIGS. 3 and 5, the inner box A has a bottom plate 23 fixed to the heat insulating structure 21 of the outer box B with support members 23a, 23a at intervals, and is connected to the bottom plate 23 at the lower end. A pair of side plates 24, 24. A top plate 36 is connected to the upper ends of the pair of gate plates 24 and 24, the upper end is supported by the top plate 36, the lower end is supported by the bottom plate 23, and the left and right ends are connected to the pair of side plates 24, 24. It consists of three inner windshields that engage with each other.

The outer box B has a heat insulating structure 21 at the bottom, and this heat insulating structure 21
A pair of side frames 25, 25 are connected at their lower ends and extend upward, a top frame 35 is connected to the upper ends of the pair of side frames 25, 25, the upper end is supported by this top frame 35, and the lower end is insulated. A pair of side frames 25 are supported by the structure 21 and have a pair of left and right ends.
It consists of an external windshield 38 engaged with the windshield. As shown in FIGS. 5 to 8, the outer windshield 38 is a double-glazed glass, and its lower end is supported by the end of the heat insulating structure 21 via a packing 37a, and its upper end is supported by the top force bar 34. Packing 37b at the longitudinal end of
Supported through.

The cold air circulation passage C formed between the inner box A and the outer box B is
A passage 20 formed between the inner box A, the bottom plate 23, and the insulating horizontal 3a body 2l of the outer box B, and the side panels 24, 24 of the inner box A and the outer box B.
A passage 28, 28' formed between the side frames 25, 25 having a heat insulating material 26 of 3 windshields and 3 outer windshields
The passage 40 communicates with the two passages through the space between the fixing members 42 provided at a distance to fix the top plate 36 to the top frame 36. It also communicates with passages 28 and 28', although it is not.

The passage 20 is a box-shaped definitely tR structure 21a, and the upper opening coincides with the opening of the insulating elliptical structure 21 of the outer box B, so that both insulating structures 21.2]. A cooler chamber 12 arranged in the machine room 3 through five seal members between a and its discharge opening 12
a and suction opening 12b. Therefore, as indicated by the arrow in FIG. 320, 28.29 or 40
, and 28 from the suction opening 12b to the cooler chamber 1.
It returns to step 2 and continues to circulate.

In addition, on the back side of the bottom plate 23 that defines the passage 20, there is a passage 2
A heat insulating member 22 is filled or pasted from the upper part of the cooler chamber 12 to the passage 28, and plays a silent role.

In order to lower the height of the machine room 3, two small-diameter condenser fans 18a and 18b are provided, and one fan 18a
Direct the air discharge measurement to the compressor 16, and direct the air discharge measurement to the other fan 18.
The discharge side b is directed toward the front side of the machine room 3, that is, toward the opening of the front cover 52. Therefore, the air whose temperature has increased due to cooling of the condenser 19 is transferred to the opening 5 of the front cover 52.
1, passes through a passage 50 defined by the air guide 44 as shown by the arrow in FIG. 5, and flows along the outer surface of the outer windshield 38 to prevent the outer windshield 38 from fogging. .

As best seen in Figure 5, the bottom plate 58 of the machine room 3 has two parallel legs 56 protruding from it.
Preferably, the refrigerated showcase 1 is placed on a counter or the like via a rubber pad 57. In addition, there is a section made of insulation material 27 at the bottom of the outer box B of the display room 2.
The structure 21 is inclined upward from the left side to the right side in FIG. 5, and the space inside the machine room 3 is higher on the right side.
The compressor 16, condenser 19, and the like, which require a relatively large space, are arranged offset toward 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 side. In addition,
The bottom plate 23 of the inner WJA is also inclined at a predetermined distance apart so as to define the passage 20 described above.

A groove 66 is formed at the lower left end of the bottom plate 23 and extends over the entire longitudinal direction of the refrigerated showcase 1, and the groove 66 has a groove 66 so as to be substantially flush with the top surface of the bottom plate 23. A bottom plate 43 is removably disposed, and usually a drainboard, ginseng, 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.
This drain hose 49 communicates with the drain pipe 7. The seal member 48 has an opening, and is fixedly held by fitting the opening into an annular embossed portion 46 formed on the bottom plate 23.

Further, as shown in FIG. 5, two rail portions 55 are formed at one end along the longitudinal direction of the top force bar 34 to receive the upper end of the sliding door l1, and the rear cover 8 of the machine room 3 is provided with two rail portions 55. At the upper end, the lower end of the sliding door 11 is attached to a slider 54.
Two rail portions 53 are formed to receive the sliding door 11 through the rail portions 53 and 55, and the sliding door 11 can be opened and closed to the left and right by the rail portions 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. In addition, the inner windshield 39
The upper end of the packing 4 is attached to 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, such as the outer windshield 38, the side frame 25, the insulation material 26 and the side force bar 4, there are It is necessary to clamp the inner windshield 39. Since 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, the measuring plate 24 has its upper left end aligned with a dashed-dotted line as shown by arrow A. After expanding outward to the position shown in the opening (along the dashed line C) and arranging the three inner windshields at predetermined positions, the side plates 24 elastically clamp the windshield. Therefore, if the side plate 24 has a high rigidity, it will be difficult to assemble the inner windshield 39, and if the rigidity is low, the sealing by the packing 41 will not be sufficient. In order to solve this problem, as shown in FIGS. 10 and 11 [], a mounting plate 102 is attached to the outer surface of the side plate 24 at a position below the above-mentioned dashed line C by means such as gluing. A reinforcing member 101 is attached onto this mounting plate 102 with screws 103. This mounting plate 102
The reinforcing member 101 is disposed such that its upper end faces the rounded portion 110 of the inner fluorocarbon glass 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 measuring plate 24.
It may be pasted on top.

Returning again to FIGS. 3, 4, and 5, as described above, the cold air circulation fan 14 and the finned cooler 15 are arranged in the cooler chamber 12, and both are separated by the partition plate 64. partitioned by. Multiple wind direction plates 3 arranged radially
2 is a guide for guiding all the wind from the cold air circulation fan 14 to the fin portion of the finned cooler, and is sealed near the outlet of the cold air circulation fan 14 and the end plate 307 of the finned cooler 15. It is installed in a shape. The finned cooler 15 is fixed to the heat insulating structure 21a so that there is no gap between it and the bottom plate 23 of the inner box A.
As shown in FIG. 4, there is a considerable distance between the end plate 307 and the heat insulating structure 2 1 a;
A passageway 303 is formed. The passage 303 can guide cold air to the return passage (28', 20') of the cold air circulation passage through an upper opening 304 provided in the partition plate 64. In the example shown in the figure, the return path 20' is provided with a partition plate 301 and a hood 302, and a passage 305 and a passage 306 constitute an auxiliary cold air circulation passage. This helps eliminate uneven temperature distribution within the inner box, that is, within the display room.

An upper opening 304 is provided in a part of the partition plate 64, and a gutter-like partition plate that matches the shape of the upper opening 304 is provided to direct new cold air to the return path (2
It is also possible to improve the temperature distribution within the display room by sending the cold air to 0'), where it joins and mixes with the circulating cold air with reduced cooling efficiency.

g. Effects of the Invention According to this invention, a passage is formed through which the air that has passed through the fin portion of the finned cooler flows in contact with the outside of the end plate, making it easier for new cold air to flow in the opposite direction. New cold air can be easily supplied to the return path of the cold air circulation passage, and heat exchange is also performed outside the end plate, making it possible to significantly improve heat exchange efficiency, especially heat exchange efficiency with respect to space.

[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. , Figure 4 is a sectional view taken along the line ■-■ in Figure 1, Figures 5, 6, and 7.
The figure and FIG. 8 are the lines ■-■ and IV- in FIG.
9 is an exploded perspective view of the refrigerator according to the present invention, and FIGS. 10 and 11 are sectional views of essential parts of the refrigerator shown in FIG. 9. It is. A...Inner box, B...Outer ii. c... Cold air circulation passage, 1... Refrigerator, 2... Display room, 3... Machine room, 4... Side power bar, 7... Drain pipe, 9...
・Ventilator, l1...sliding door, l2...cooler room, 1
2 a...Discharge opening, 12b... Suction opening, 14
...Cold air circulation fan, 15...Finned cooler,
16...Compressor, 18re 18b...Condenser fan, 1...Condenser, 20, 28, 29, 40.28'
, 20'...Passage, 21...Insulating structure, 23.
...Bottom plate, 24...Side plate, 25...Side frame,
35...I plane, 36...Top plate, 38
...Outer windshield, 39...Inner windshield, 64...Partition plate, 301...1 upper cutting plate, 302
...Hood, 303...Outer passage, 304...Top opening, 305...Auxiliary cold air circulation passage, 306...
Passage, 307...end plate.

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;
A refrigeration system comprising a cooler chamber disposed in the cold air circulation passage, a finned cooler arranged in the cooler chamber and connected to a refrigeration circuit, and a cold air circulation fan, the cold air circulation fan A guide is provided for guiding all of the air from the air outlet to the inside of the end plate of the finned cooler, and at least a part of the air that has passed through the finned cooler flows in contact with the outside of the end plate. A refrigeration device characterized by forming.