JPH0823468B2 - Refrigeration machine room structure of refrigerated showcase - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating showcase suitable for refrigerating and displaying fresh foods such as sushi ingredients in, for example, a sushi restaurant, and more particularly to a structure of a refrigerating machine room thereof.

[0002]

2. Description of the Related Art To prevent the quality of fresh foods such as sushi ingredients from being deteriorated and store them in a refrigerated state, it is necessary to prevent excessive drying in the refrigerator.
It is important to prevent uneven temperature in the refrigerator and natural convection of the air in the refrigerator due to various causes.

From this point of view, the applicant of the present invention has proposed various refrigerating apparatuses having a display room composed of an inner box for storing refrigerated food and an outer box surrounding the inner box to define a cold air circulation passage. It has been proposed (Japanese Patent Application No. 1-51857).

In this refrigerating apparatus, a cooler chamber for accommodating the cooler of the refrigeration circuit and the cool air circulation fan is provided adjacent to the bottom surface of the outer box of the display room and in communication with the cool air circulation passage. Further, a refrigerant compressor of the refrigeration circuit, a condenser and a fan for cooling these are adjacent to the bottom surface of the outer box of the display room,
In addition, they are installed side by side in the cooler room to minimize the total height of the refrigerating display room.

[0005]

In the apparatus described above, the condenser and the refrigerant compressor, which require cooling during operation, are arranged on the same plane, and the fan motor for the condenser sends air to them. However, there is a problem that the condensing efficiency is poor because the flow path of the air flow is bent due to space restrictions. In addition, since the condenser that emits high heat is installed adjacent to the display room, the heat is exerted on the display room and the cooling is not always sufficient. The present invention aims to solve such problems.

[0006]

In order to achieve this object, in the present invention, a refrigerating circuit machine room of a refrigerating showcase having a double structure type display room is constructed as follows. That is, the cooler chamber containing the cooler and the cooling fan is defined by a box-shaped heat insulating block, and the condenser chamber is arranged below the cooler chamber, while the compressor containing the compressor and the condenser fan is compressed. A machine room was formed next to the cooler room and adjacent to the display room. The condenser chamber extends below the condenser fan in the compressor chamber to allow cooling air to be received.

[0007]

The cooling fan in the cooler room supplies and circulates the air for cooling the display room, and the cool air cooled by the cooler is used for cooling the inner box of the display room and the inside thereof. By the action of the condenser fan, the outside air that has flowed into the compressor chamber cools the compressor and is then sent to the condenser chamber to cool it. Since the condenser is separated from the display room by the cooler room, the heat of condensation is not transferred to the display room.

[0008]

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

FIG. 1 is a front perspective view of a refrigerating showcase according to an embodiment of the present invention, and FIG. 2 is a rear perspective view thereof.
This type of refrigerated showcase is widely used for refrigeration and display of fresh foods such as sushi ingredients in sushi shops, etc.
Also called. 1 and 2, the refrigerated showcase 1 includes an upper display room 2 and a lower refrigeration circuit machine room 3, and both side ends of the display room 2 are closed by side covers 4. From the rear cover 8 of the machine room 3,
The power cord 5 and the ground wire 6 extend, and the tip of the drain pipe 7 also projects. A power source on / off switch S used for controlling the refrigerating operation of the refrigerating showcase 1 is also attached to the rear cover 8, and a ventilation port 9 which is an intake of cooling air described later is also provided. A sliding door 11 used for putting in and out of refrigerated food is provided on the rear surface of the display room 2 and is divided by a center frame 10 in the center.

In FIG. 3, which shows a vertical cross section taken along the line III--III of FIG. 1, the display room 2 includes an inner box A for storing fresh foods to be displayed, for example, sushi items, and an outer box surrounding the inner box A. A cold air circulation passage C is defined by B and B, and the details thereof will be described later. FIG. 4 shows IV- of FIG.
A vertical longitudinal section along line IV is shown. With reference to FIGS. 3 and 4, the inner box A includes a bottom plate 21, a pair of side plates 23 at both ends thereof, a horizontal top plate 25 extending in the longitudinal direction like the bottom plate 21, an inner front windshield 26, And it is mainly comprised from the sliding door 11 mentioned above.

On the other hand, the outer box B includes a pair of side frames 2
7, top frame 29 connecting these side frames 27, side cover 4 described above, top cover 31 at the top, multi-layer windshield 33 at the front, and sliding door 1
Although mainly composed of 1, the bottom surface side is formed with heat insulating structures 56a and 56b which serve as partition walls with the machine room 3 described later. As is clear from the above description, the rear surface side of the display room 2 is only the sliding door 11, and the sliding door 11 also serves as the rear surface of the inner box A and the rear surface of the outer box B.

The cold air circulation passage C is composed of a bottom outward passage 41, a side outward passage 43, a ceiling passage 45, a front passage 47 between the windshields 26 and 33, a side return passage 49 and a bottom return passage 51.

In particular, as is clear from FIG. 4, the bottom plate 21
Is inclined so that the front surface side becomes lower, and the front and rear ends thereof are supported by the support members 35a and 35b, and the heat insulating structures 56a and 56a.
It is supported on b and defines a bottom outward path 41. Furthermore,
A heat insulating member 37 is attached to the lower surface of the bottom plate 21 so that the low temperature of the cool air is not largely transmitted to the inside of the inner box A. On the other hand, the top plate 25 that defines the ceiling passage 45 and the top frame 29 are connected by a fixing member 39, and the ceiling passage 45 and the front passage 47 communicate with each other through a narrow gap above the inner windshield 26.

Next, the structure of the machine room 3 will be described with reference to FIGS. 5 and 3 showing a horizontal cross section taken along the line VV of FIG. 3. The machine room 3 is roughly divided into a cooler. It comprises a chamber 60, a compressor chamber 80, a condenser chamber 100 and a front warming chamber 110. The cooler chamber 60 is located between the bottom outward path 41 and the bottom return path 51, and is defined by a heat insulating block 65 which is a box-shaped heat insulating structure that houses the cooling fan 61 and the cooler 63. The heat insulating block 65 is preferably made of an integrally molded product such as Styrofoam, and its mounting and fixing method will be described later. The heat insulating member 37 on the lower surface of the bottom plate 21 is connected to the bottom outward path 4
1 from above the cooler 63 to its left end (see FIG.
In)) is terminated immediately above.

A cooling plate 67 made of a copper plate is sandwiched between the cooler 63 and the heat insulating member 37 and extends into the bottom return path 51. The heat insulating member is provided on the lower surface of the bottom plate 21 in this portion. Since there is no 37, it directly contacts the lower surface of the bottom plate 21 and is bent at the boundary portion 67a. The cooler 63 includes a flexible tube 63a through which the refrigerant flows and end plates 63b on both sides.
And a plurality of fins sandwiched therebetween as shown in FIG. 5, and the end plate 63b is composed of two wind direction plates 69.
By a and 69b, they are hermetically connected to a partition plate 71 which also serves as a support frame for the cooling fan 61. As a result, all the air that has flowed into the inlet plenum 73 of the cooler chamber 60 and passed through the cooling fan 61 is the wind direction plates 69a, 69.
It is guided to b and flows between the end plates 63b of the cooler 63.

The outlet guide 7 is also provided on the air outlet side of the cooler 63.
5 is provided, and the main passage 77a that goes to the bottom outward passage 41 on the air outlet side and the inversion passage 77b that goes to the bypass passage 79.
It is divided into That is, the outlet guide 75 is the closing plate 75.
a and a guide plate 75 extending to the bottom surface of the heat insulating block 65
b, the cool air flowing along the inner side of the end plate 63b of the cooler 63 is supplied from the inversion passage 77b to the bypass passage 7b.
I'm going to 9. The upper ends of the closing plate 75a and the guide plate 75b are in close contact with the heat insulating member 37 on the lower surface of the bottom plate 21, and the main flow passage 77a and the reversing flow passage 77b are completely partitioned.

The bottom return path 51 is provided with a horizontal partition plate 52, which is divided into a lower main return path 51a and an upper auxiliary circulation return path 54. FIG. 6 shows a horizontal cross section taken along line VI-VI of FIG. 3, but clearly shows that the auxiliary circulation return path 54 communicates with the bypass passage 79. The flow and action of the cooling air flowing through the cool air circulation passage C will be described with reference to FIGS. 6 and 3, and the cooling fan 61 will be described.
The air sucked in and flowing into the inlet plenum 73 flows through the cooling fan 61, is guided by the wind direction plates 69a and 69b, and flows through the fin portion of the cooler 63 (the portion between the two end plates 63b). At this time, the heat of vaporization is taken by the refrigerant flowing through the flexible tube 63a to be cooled. The cooled main stream of air flows into the bottom outward passage 41 through the main passage 77a on the air outlet side of the cooler 63. This cold air goes to the bottom outbound path 4.
1 flows into the side outward path 43, but the heat is shielded by the heat insulating member 37, and the inside of the inner box A is not excessively cooled. Further, the cool air flows through the side outward path 43, separates through the ceiling passage 45 and the front passage 47, merges again in the side return passage 49, and then flows forward. While the air flows through the side outward passage 43, the ceiling passage 45, the front passage 47, and the side return passage 49,
Cooling the inside of the inner box A, the temperature of the inner box A rises, flows through the main return path 51a of the bottom return path 51, and returns to the inlet plenum 73.

On the air outlet side of the cooler 63, the reversing passage 77 is divided by the guide plate 75b of the outlet guide 75.
The sub-stream of the cool air that has flowed into b flows through the bypass passage 79 between the end plate 63b and the partition wall of the cooler chamber 60, the auxiliary circulation return passage 54 on the horizontal partition plate 52, and the bottom plate 21.
The heat inside the inner box A is taken from the lower surface of the. The cooling plate 37 is a copper plate having a high thermal conductivity and is cooled by the cooler 63, so that the heat is more effectively taken from the inside of the inner box A. Cooling plate 3
The aluminum plate 7 may be an aluminum plate, or a plate-shaped heat pipe can provide the same effect.

Next, FIGS. 3 and 4 and FIG.
The structure of the compressor room 80, the condenser room 100, and the front warm air room 110 is demonstrated with reference to FIG. 7 which shows the vertical cross section which follows the VII-VII line.

The heat insulating structures 56a and 56b forming the bottom surface of the outer box B of the display room 2 are inclined so that the front surface side (left side in FIGS. 4 and 7) becomes lower like the bottom plate 21. A vertical support partition 81 extends from the vicinity thereof. A horizontal partition plate 83 having a hat-shaped cross section supports the lower end of the support partition 81 at one end and communicates with the rear cover 8 at the other end, and preferably via ceramic heat insulating pads 65a, 65b. The heat insulating block 65 is supported. As described above, the heat insulating block 65
Is made of styrofoam, but the condenser chamber 100 has a higher heat insulating property than the heat insulating block, and is supported by ceramic heat insulating pads 65a and 65b having a high melting temperature and a high flash point, and is separated from the horizontal partition plate 83, Since it is also separated from the support partition 81, it is sufficiently protected from the heat of condensation described later. As the material of the heat insulating pads 65a and 65b, wood, cork, heat resistant resin, etc. can be used in addition to ceramics. The horizontal partition plate 83 extends over the entire area of the machine chamber 3, but forms a recess 83 a in the vicinity of the compressor 85. The compressor 85 is fixed on the bracket 87 adjacent to the vent hole 9 of the rear cover 8. Compressor room 80
A condenser fan 89 is supported and fixed to the front sides of the compressor 85 by supports 91a and 91b. The shroud 93 protruding upward from the horizontal partition plate 83 surrounds the blades of the fan 89.

An inverted hat-shaped bottom plate 103 having an elastic rubber pad 101 attached to an appropriate place on the lower surface faces and is joined to the horizontal partition plate 83 to define a condenser chamber 100 therebetween.
At the installation portion of the compressor 85, the horizontal partition plate 83 is a recess 83a.
Therefore, a substantial condenser chamber is not formed in this portion.

Except for this portion and below the fan 89, and substantially below the heat insulating block 65, the condensation pipe 1
Reference numeral 05 is meanderingly provided on the lower surface of the horizontal partition plate 83 and the upper surface of the bottom plate 103, and is supported and fixed by the spacer 107. The condensing pipe 105 communicates with the refrigerant compressor 85 and the cooler 63 in terms of a refrigeration circuit, and a passage for cooling air is formed between the upper and lower condensing pipes 105.

As is apparent from FIGS. 4 and 7, the supporting partition 81, the vertical portion 83b on the front side of the horizontal partition plate 83, and the bottom plate 1
Front cover 11 rising from the front side flange of 03
A front warm air chamber 110, which is defined by 1 in cooperation with the front end portions of the heat insulating structures 56a and 56b, extends in the longitudinal direction over substantially the entire length of the refrigerating showcase 1. Then, the compressor-side end of the warm air chamber 110 is closed, and an opening 113 is provided at the end of the condensing pipe 105 side, and the opening 113 is further covered by a flow blocking plate 115 so as to be separated therefrom. Front cover 111
An opening 117 is bored in the upper end of the air passageway and communicates with a passage 121 defined between the air guide 119 and the front ends of the heat insulating structures 56a and 56b. The opening ratio of the opening 117 becomes smaller toward the left side in FIG. 3, so that the warm air flowing out from the front warm air chamber 110 to the passage 121 is evenly distributed in the longitudinal direction. On the front side vertical portion 83b of the horizontal partition plate 83, a horizontally narrow opening or slot 83c is provided near the opening 113, as shown by the chain double-dashed line in FIG.

Returning to FIG. 5, the compressor 85 and the fan 89.
Although the horizontal positional relationship is shown, the figure also shows that the electrical equipment board 130 is provided with the heat insulating block 65 interposed therebetween.

The flow of air during the refrigerating operation in the machine room 3 having the above-described structure will be described. Although the flow inside the cooler chamber 60 has been described above, when the fan 89 is rotated, the air inside the compressor chamber 80 is sucked into it, so that external air flows in through the ventilation port 9 of the rear cover 8. That is, the external air flows in through the ventilation port 9, flows around the compressor 85, reaches the fan 89, and cools the compressor 85 in this process.

The air flown into the condenser chamber 100 by the fan 89 flows between the condensing pipes 105 and removes heat from the refrigerant to condense it. Part of the air, that is, warm air, which has taken away the heat of condensation to raise its temperature, flows out laterally through the opening 113. The remaining warm air flows into the front warm air chamber 110 through the opening 83c, passes through the opening 117 of the front cover 111, and passes through the passage 121.
Flows into the interior, is guided by the air guide 119, and is displayed in the display room 2.
Flows out along the outer surface of the windshield 33. Since the ratio of the opening 117 provided in the front cover 111, that is, the opening ratio is set as described above, the warm air can be absorbed by the windshield 3.
Since it flows evenly on the outer surface of 3, the haze is properly removed. The above-described setting of the aperture ratio can be realized by changing the pitch along the longitudinal direction when the opening 117 is formed of a plurality of round holes, but the diameter of the round holes may be changed. Also,
The opening 117 may be a plurality of square holes or elongated slots, and can be appropriately selected.

In the above-mentioned embodiment, the structure of the machine room 3 is divided into four chambers, that is, a cooler room, a compressor room, a condenser room and a front warming room in terms of its function. Of course, the cooler room and the compressor room may be considered as the upper room, the condenser room as the lower room, and the front warming room as the front room.

In the above-described embodiment, the heat insulating block 65 that defines the cooler chamber 60 is formed of styrofoam having a relatively low melting point. However, since it is separated from the condenser chamber 100 by the heat insulating pad, the condenser may be damaged due to an accident or the like. It does not suffer any heat damage even at high temperatures.

[0029]

As described above, according to the present invention, since the condenser chamber is located far from the display chamber, it is possible to cool the display chamber efficiently and evenly. Also, the outside air that has cooled the compressor can also change its direction once after exiting the condenser fan, but after that, it flows evenly in the condenser chamber,
The condenser can be cooled efficiently.

[Brief description of drawings]

FIG. 1 is a front perspective view of a refrigerating showcase including a refrigerating machine room structure according to an embodiment of the present invention.

FIG. 2 is a rear perspective view of the refrigerated showcase of FIG.

FIG. 3 is a vertical vertical cross-sectional view showing the refrigerated showcase of FIG. 1 taken along line III-III.

FIG. 4 is a vertical vertical sectional view taken along the line IV-IV of FIG.

5 is a horizontal cross-sectional view taken along the line VV of FIG.

6 is a horizontal cross-sectional view taken along the line VI-VI of FIG.

7 is a vertical vertical sectional view taken along the line VII-VII of FIG.

[Explanation of symbols]

 1 Refrigerated Showcase 2 Display Room A Inner Box of Display Room B Outer Box of Display Room 3 Machine Room 60 Cooler Room 61 Cooling Fan 63 Cooler 65 Insulation Block 65a Insulation Pad 65b Insulation Pad 80 Compressor Room 85 Compressor 89 Condensation Fan 100 Condenser room 110 Front warm room

Continuation of the front page (56) References JP-A-2-233966 (JP, A) Actually open 59-139166 (JP, U) Actually open 63-159175 (JP, U)

Claims (2)

[Claims] 1. A refrigerated showcase having a double-structured display room having an inner box and an outer box and a machine room for a refrigeration circuit provided in the lower part of the display room, wherein a bottom of the outer box of the display room is provided. From the cooler chamber and the compressor chamber, which are arranged in parallel along with each other, the condenser chamber and the front warming chamber, which are respectively arranged along the lower surface and the front surface of the cooler chamber and the compressor chamber, to the refrigeration circuit machine room. Refrigerating machine room structure of a refrigerated showcase, which is characterized in that 2. A heat insulating block that contains a cooler and a cooling fan of a refrigerating circuit and defines the cooler chamber is formed of foamed resin, and the heat insulating block of the condenser chamber is formed through another heat insulating pad. The refrigerating machine room structure of a refrigerating showcase according to claim 1, which is fixed to an upper surface.