JPH0399184A - Refrigeration device - Google Patents

Abstract

PURPOSE:To make a uniform distribution of temperature within a show-case to perform a cooling and storing operation by a method wherein a bypassing passage is arranged in a cold air circulation passage from its going side to a returning side and then the cold air at the going side passage is merged and mixed with the cold air in the returning passage. CONSTITUTION:Air from a cold air circulating fan 14 is cooled by a finned cooling device 15 within a cooling chamber 12, passes through going-out passage 20, 28, 29 in the cold air circulating passage C and returning passages 28' and 20' defined between the inner case A and the outer case B from a discharging port 12a and the air is circulated. A part of the cold air cooled by a cooling device 15 passes outside and end plate 307, enters from an upper opening 304 to a passage 305 between the inner case A and the partition plate 301 and further a part of it passes through a bypassing passage, enters the returning passage 28' in the passage 29 and then returns to a fan 14 from a passage 306 below the partition plate 301 and a suction opening 12b while keeping the cold air at the returning passage 28' at the low temperature. In this way, it is possible to make a uniform distribution of temperature within the inner case, i.e. the show-case.

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., and is called a netagame. The present invention relates to 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 inside of the display room was directly cooled by passing it through this cooling vibrator (for example, Japanese Patent Laid-Open No. 62
(Refer to Publication No.-37665). However, in such a refrigeration system, since the cooling pipe is arranged inside the display room, (1) the cooling vibrator may get in the way when taking out and taking out items on display or 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, accelerating the drying of the atmosphere in the display room, which is an adverse condition for the displayed 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 pipes and the display room, airflow due to natural convection occurs, and when the displayed items are especially fresh foods, they are affected by the airflow. There have been various problems such as discoloration of the surface of fresh foods. 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 bypass passage is provided in the cold air circulation passageway from the outgoing side to the incoming side, so that the cold air on the outgoing side joins and mixes with the cold air on the incoming side.

e. Function: The cold air from the outbound trip merges with the cold air from the return trip, so
The temperature of the cold air on the return trip side can be brought close to the temperature of the cold air on the outbound trip side, and the inside of the display room can be cooled with a uniform temperature distribution. Therefore, there is no chance of extremely cold frost forming or high temperature areas.

f. Example Hereinafter, an example of the present invention will be explained with reference to the refrigeration device shown in the figure. 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 a refrigerated showcase of the present invention, in which 1 is a refrigerated showcase, 2 is a display room, 3 is a machine room for a refrigeration circuit, and 4.4 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 cross-sectional view showing the refrigerated showroom shown in FIG. 1 along a vertical cross section. It consists of 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 showcase shown in FIGS. A chamber 12, an electrical panel 13, a compressor 16 supported by preferably rubber feet 17, and condenser fans 18a, 18b.
, one condenser, a duct forming plate 33, etc. are provided.

Inside the cooler chamber 12, a cold air circulation fan 14 and a cooler 1 are installed.
5 is arranged, and the cooler 15 is connected to a cooling circuit such as a compressor 16 and a condenser 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 l4 is cooled 31
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 inner box A has a bottom plate 23 fixed to the mature structure 21 of the outer box B at intervals using support members 23a, 23a, and a lower end of the bottom plate 23. a pair of side plates 24, 24 connected by and extending upward; a top plate 36 connected to the upper ends of the pair of side plates 24 and 24; It consists of three inner windshields whose left and right ends are engaged with a pair of side plates 24 and 24. Outer box B
is a bottom Ur thermal ellipsoid body 21, a pair of side frames 25 connected to this decisive structure 21 at the lower end and extending upward.
, 25, a top frame 35 connected to the upper ends of this pair of side frames 25. It consists of an outer windshield 38 engaged with the side frame 25. In addition,
As shown in FIGS. 5-8, the outer windshield 38
is 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 end along the longitudinal direction of the top force bar 34 via a packing 37b. ．． The cold air circulation passage C formed between the inner box A and the outer box B includes a passage 20 formed between the bottom plate 23 of the inner box A and the heat insulating structure 21 of the outer box B, and both side plates of the inner box A. Passage 28.28 formed between 24.24 and side frame 25.25 with Ijfr silencer 26 of outer ff B
', two passages formed between the top plate 36 of the inner ifA and the top frame 35 of the outer 21B, and a passage 40 formed between the inner windshield 39 and the outer windshield 38. passes through the space between the fixing members 42 provided at a distance to fix the top plate 36 to the frame 36. ? Although not shown, it also communicates with passages 28 and 28'.

The passage 20 is a box-shaped Ur thermal structure 21a, and the upper opening thereof is aligned with the opening of the heat insulation structure 21 of the outer box B. A cooler chamber 12 disposed within the cooler chamber 12 and its discharge opening 12a.
and communicate through the suction opening 12b. Therefore, as shown by the arrows in FIG. It returns to the cooler chamber 12 through the suction opening 12b and circulates there.

Note that the passage 2 is formed on the back surface of the bottom plate 23 that forms the passage 20.
A member 22 is filled or pasted from the upper part of the cooler chamber 12 to the passage 28 to play the role of heat insulation.

In order to lower the height of the machine room 3, two small-diameter condenser fans 18a and 18b are provided, one fan 18a directs the air discharge toward the compressor 16, and the other fan 18b directs the air discharge toward the tR machine room 3. The discharge side is directed toward the front side, that is, the opening of the front cover 52. Therefore, the air whose temperature has increased due to being used for cooling the condenser 19 is transferred to the opening 5l of the front cover 52.
The air 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, thereby preventing the outer windshield 38 from fogging.

As best seen in FIG. 5, two parallel legs 56 protrude from the bottom plate 58 of the machine room 3, and are preferably connected to the refrigerated showcase 1 via rubber pads 57.
is placed on the counter, etc. Furthermore, the heat insulating structure 21 made of the RGR heat material 27 at the bottom defining the outer box B of the display room 2 is inclined upward from the left side in FIG. The space is higher on the right side, and the compressor 116, condenser 19, etc., which require a relatively large space, are offset to the right side where the height of the space is higher. Therefore, the display room 2 has a lower height 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 '4 so as to define the passage 20 described above.

The bottom plate 23 has a groove 66 formed at its lower left end that extends over the entire longitudinal direction of the refrigerated showcase 1. A bottom plate 43 is removably disposed on the bottom plate 23 and the bottom plate 43 is usually covered with a material such as ``Drainboard'' or ``Ginsu''. A drain port 45 is formed through the drain port 45, and a drain hose 49 is connected to the drain port 45 via a connecting pipe 47, and this drain hose 49 communicates with the drain pipe 7. This opening is fitted into an annular embossed portion 46 formed on the bottom plate 23 to be fixedly held.

Furthermore, as shown in FIG. 5, two rail portions 55 are formed at one end along the longitudinal force direction of the top force bar 34 to receive the upper end of the sliding door 11, and the rear cover of the machine room 3 At the upper end of 8, the lower end of the sliding door 11 is attached to the slider 5.
Two rail portions 53 are formed to be received via the
The sliding door 11 can be opened and closed from side to side by means of rail parts 53 and 55. The end of the bottom plate 23 is bent into an L shape,
There, the lower ends of the three inner windshields are attached to the packing 41a.
Supported through. In addition, the inner windshield 3
The upper end of each is supported by the top plate 36 and its fixing member 42 via a packing 4lb.

In addition, in FIGS. 6 and 7, the reference numeral 60 indicates the cooler chamber 1.
A drainage vibrator for draining water from 2, reference numeral 62 indicates pressure [11
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 sandwich the inner Freon I/glass 39. The longitudinal dimension of the inner fluorocarbon glass 39 surrounding the packing 41 is the left and right side plates 24.2.
4, the measuring board 24 extends its upper left end outward to the position shown by the dashed-dotted line as shown by the arrow A (along the dashed-dotted line C), and extends the inner front After the three glasses are placed in a predetermined position, they are elastically supported by the side plates 24. Therefore, if the side plate 24 has high rigidity, it is difficult to assemble the inwardly opening 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 attached onto this mounting plate 102 with screws 103. This mounting plate 10
2 and the reinforcing member 101 are arranged such that their upper ends are directed toward the rounded portion 110 of the inner fluorocarbon l/glass 39.

Therefore, the reinforcing member 101 exists 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 and 5, a gutter-shaped partition plate 301 is fixed to the lower surface of the bottom plate 23 of the inner box A in the passage 20' constituting the return path of the cold air circulation path, and the outflow side, that is, A passage 305 connects the outlet of the cooler 15 to the upper opening 304 of the partition plate 64 via the outer passage 303.303 formed on the outside of the end plate 307 of the cooler, and the return passage 20' side of the cold air circulation passage. It is tied by

The new cold air guided to the passage 305 also enters the return passages 28', 20' and the passage 40 of the cold air circulation passage, and the hot air that is losing its cooling capacity mixes with the cold air, so that the balance of cold air is well maintained on the return passage side as well. This reduced the uneven temperature distribution within the display room. Furthermore, the display room no longer gets extremely cold and frost forms, or there are no extremely hot areas.

Note that the support member 23 of the bottom plate 23 of the inner box A is connected to the passage 40.
a, passes through the passage 100 and passage 101, and enters the passage 40 between the outer front windshield 1 to the glass 38 and the three inner windshields, and a part of it also reaches two passages, leading to the outbound passage. This improves the overall cooling balance by combining and mixing with the cold air that has been warmed by the air flow and is losing its cooling capacity. Therefore, even if the refrigerated showcase 1 is quite long in the longitudinal direction, it is possible to prevent imbalance in temperature distribution between the left and right sides of the display room.

g. Effects of the Invention According to the present invention, the cold air on the outbound side of the cold air circulation path is merged with the cold air on the return side, so the temperature balance of the entire cold air can be maintained, and therefore the temperature distribution in the display room can be improved. It can be homogenized, cooled, and stored.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a refrigeration system according to the present invention as seen from the front, Fig. 2 is a perspective view of the refrigeration system as seen from the rear side, and Fig. 3 is a cross section taken along line 1-1 in Fig. 1. Figure 4 is a sectional view taken along line 1 and 5 in Figure 1, and Figure 5. Figures 6 and 7
The figure and Figure 8 are the ■1■ line and ■-1 of Figure 4, respectively.
9 is an exploded perspective view of the refrigerator according to the present invention, and FIGS. 10 and 11 are cross-sectional views of the main parts of the refrigerator shown in FIG. 9. It is a diagram. A...Inner box, B...Outer box, C...Cold air circulation passage, 1...
Refrigerator, 2. Display room, 3. RIiiili room, 4.
・Side force bar, 7. Drain pipe, 9 ventilation hole, 11.
・Sliding door, 12...Cooler room, 12a...Discharge opening, 1
2b... Suction opening, 14. Cool air circulation fan, 15...
Cooler, 16/Compressor, 18a, 18b... Condenser fan, 1... Condenser, 20, 28, 29, 40.28
'20'...Aisle, 21...Insulating structure, 23...Bottom plate, 24...Side plate, 25...Side frame, 35...Top frame, 36...Ceiling, 38 Outside windshield, 39... Inside Freon 1・Glass, 64・・Partition plate,
301... Partition plate, 303... Outside bait passage, 304... Upper opening, 305, 306... Passage, 307... End play-1~. Figure 6

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, the cold air circulation passage has an outgoing path thereof. A refrigeration device characterized in that a bypass passage is provided from the side to the return side, and the cold air on the outbound side is merged and mixed with the cold air on the return side.