JPH0823469B2 - 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, and more particularly to the structure of its machine room.

[0002]

2. Description of the Related Art For example, a refrigerated showcase suitable for refrigerating and displaying fresh food such as sushi material in a sushi store is
It is also called "Netacase", but by its nature,
It is required that the quality of sushi material is strictly prevented from deteriorating and that the inside can be easily cleaned. In response to such demands, an indirect cooling type refrigerating device having a double structure of a display room has been proposed (Japanese Patent Application No. 1-51857).

In this type of refrigerating apparatus, a display room is composed of an inner box for accommodating an object to be displayed and an outer box surrounding the inner box to define a cold air circulation passage therebetween, and a machine below the display room. In the chamber, a cooler, a cooling fan, a refrigerant compressor, a condenser, a condenser fan, an operation control electrical board, and the like are arranged in a plane. In order to prevent fogging of the windshield of the display room, the air passage and the air guide are arranged so that the air used for cooling the refrigerant compressor and the condenser, that is, the hot exhaust flows along the entire surface of the windshield. It is provided on the panel. It is extremely important to prevent the fog on the windshield from obscuring the objects to be displayed inside.

[0004]

As described above, this type of refrigerated showcase is often cleaned not only inside the display room but also outside. And the water used for cleaning is
It may flow into the machine room through the aforementioned air passage. When the water flowing into the machine room in this way hits the compressor, cooling fan, condenser fan, electrical equipment panel, etc., insulation failure is likely to occur, which may lead to electrical leakage and abnormal rotation of the fan motor. .

It is an object of the present invention to provide a refrigerating showcase capable of preventing such an electric accident due to flooding or flooding.

[0006]

In order to achieve the above object, according to the present invention, an upper display room and a lower machine room are arranged so as to overlap each other, and along the windshield of the display room. In a refrigerating showcase in which warm exhaust air is blown out, a front chamber that is isolated from others is defined over the entire front part of the machine room, and this front chamber communicates with the warm exhaust air passage. The other part of the machine room, which is separated from the front chamber, is divided into an upper chamber and a lower chamber, and a condenser is provided in the latter, while a cooling fan, a condenser fan, and a compressor are provided in the former. , An electrical board, etc. are provided. The flow path of the cooling air driven by the condenser fan passes around the compressor, passes through the lower chamber, and then reaches the lower portion of the front chamber.

[0007]

In the present invention having the above-described structure, when the refrigerating apparatus is operated, the air sent from the cooling fan is cooled by the cooler and is used for cooling the inside of the display room. On the other hand, the condenser fan takes in cooling air from the outside of the machine room,
The air cools the compressor in the upper chamber, and then sends the air to the lower chamber to cool the condenser and sends it to the front chamber.

This warm exhaust gas that has been warmed by being cooled is blown out from the outer surface of the windshield of the display room and is used for preventing fogging, and the wash water flows in the opposite direction to the machine room, Inflow of wash water into the upper chamber is blocked by the partition wall between the front chamber and the upper chamber.

[0009]

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 display room 2
The tip of the drainage pipe 7 communicating with the inside of the pipe 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. Sliding door 11 for entering and leaving refrigerated food is displayed in display room 2
It is provided on the rear surface and is divided by the center frame 10 at 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. Referring to FIGS. 3 and 4, the inner box A includes a bottom plate 21, a pair of side plates 23 on both ends thereof, a horizontal top plate 25 extending in the longitudinal direction like the bottom plate 21, an inner front windshield of the front face. 26 and the sliding door 11 described above.

On the other hand, the outer box B includes a pair of side frames 2
7, a top frame 29 connecting these side frames 27, the side cover 4 described above, the top cover 31 at the top, the front multi-layer windshield 33, and the 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 a 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 comprises 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 apparent 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 a lower surface of the bottom plate 21 at a portion in contact with the bottom outward path 41 so that a low temperature of the cool air immediately after being cooled by a cooler described later is not transmitted to the inside of the inner box A much. . On the other hand, the top plate 25 defining the ceiling passage 45 and the top frame 29 are connected by a fixing member 39,
The ceiling passage 45 and the front passage 47 are provided on the inner windshield 2.
It communicates through the narrow gap above 6.

Next, the structure of the machine room 3 will be described with reference to FIGS. 5 and 3 showing the horizontal cross section taken along the line VV of FIG. It comprises a cooler chamber 60 and a compressor chamber 80 formed in the chamber, and a condenser chamber 100 and a front chamber, that is, a front warm air chamber 110 formed in the lower chamber. The cooler chamber 60 is located in the middle of the bottom outward path 41 and the bottom return path 51 forming a part of the aforementioned cool air circulation passage C, and is a box-shaped heat insulating structure that houses the cooling fan 61 and the cooler 63. It is defined by block 65. The heat insulating block 65 is preferably made of an integrally molded product such as Styrofoam, and its mounting and fixing structure will be described later. The heat insulating member 37 on the lower surface of the bottom plate 21 is attached to the cooler 6 from above the bottom outward path 41.
3 and terminates immediately above its left edge (in FIG. 3).

A cooling plate 67 made of a copper plate is sandwiched between the cooler 63 and the heat insulating member 37 and further 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, the end plate 63b is a partition plate 71 that also functions as a support frame for the cooling fan 61 by the two wind direction plates 69a and 69b.
Is hermetically connected to. 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 guided to the wind direction plates 69a and 69b and flows between the end plates 63b of the cooler 63.

An outlet guide 75 is also provided on the air outlet side of the cooler 63, and a main passage 77a extending toward the bottom outward passage 41 and an inversion passage 77 extending toward the bypass passage 79 on the air outlet side.
It is divided into b. That is, the outlet guide 75 is the closing plate 7
5a and the guide plate 7 extending to the bottom surface of the heat insulating block 65
5b, the cool air flowing along the inside of the end plate 63b of the cooler 63 is guided from the inversion passage 77b to the bypass passage 79. Closing plate 75a and guide plate 75b
The upper end of each of them is 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.

A horizontal partition plate 52 is provided inside the bottom return path 51.
Is provided, and this is divided into a lower main return path 51a and an upper auxiliary circulation return path 54. FIG. 6 shows VI- of FIG.
A horizontal cross section along line VI is shown, but the auxiliary circulation return path 5
4 clearly shows how it connects to the bypass passage 79. The flow and action of the cooling air flowing through the cold air circulation passage C will be described with reference to FIGS. 6 and 3. The air sucked by the cooling fan 61 and flowing into the inlet plenum 73 passes through the cooling fan 61, The fins of the cooler 63 (the portion between the two end plates 63b) are guided by the wind direction plates 69a and 69b. 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 flows through the bottom outward path 41 and flows into the side outward path 43,
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, is divided, flows through the ceiling passage 45 and the front passage 47, and merges again in the side return path 49 to flow. Side outward passage 43, ceiling passage 4
5, the cool air cools the inside of the inner box A while flowing through the front passage 47 and the side return path 49, and the temperature of the cool air rises to the bottom return path 5 itself.
It flows through the main return path 51a of No. 1 and returns to the entrance 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 67 is a copper plate having a high thermal conductivity and is cooled by the cooler 63, so that the heat can be more effectively taken from the inside of the inner box A. Cooling plate 6
The aluminum plate 7 may be an aluminum plate, or a plate-shaped heat pipe can provide the same effect.

Next, referring to FIG. 3 and FIG. 4 and FIG.
The structures of the compressor chamber 80, the condenser chamber 100, and the front warming chamber 110 will be described with reference to FIG. 7 showing a vertical section taken along the line VII-VII.

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. The 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 connects the heat insulating block 65 via the ceramic heat insulating pads 65a and 65b. I support you. As described above, the heat insulating block 65 is made of Styrofoam, but also has heat insulating properties and is supported by the 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 to support the partition wall 81. Since it is also away from, 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.

In this part, the horizontal partition plate 83 cooperates with the supporting partition wall 81, the rear cover 8 and the heat insulating structure 56b to define the compressor chamber 80. The compressor 85 has a rear cover 8
It is fixed on the bracket 87 adjacent to the ventilation port 9 of the. A condenser fan 89 is provided on the front side of the compressor 85.
Are supported and fixed by supports 91a and 91b. Shroud 93 protruding upward from the horizontal partition plate 83
Surrounds the blades of the condenser fan 89. As described above, since the cooler chamber 60 and the compressor chamber 80 belong to the upper chamber, the horizontal partition plate 83 serves as the boundary or partition between the upper chamber and the lower chamber.

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

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 is (refrigerant) in terms of the refrigeration circuit.
A passage or flow path for cooling air driven by a condenser fan 89 is formed between the upper and lower condenser pipes 105, which communicate with the compressor 85 and the cooler 63.

As is apparent from FIGS. 4 and 7, the supporting partition 81 and the front vertical portion 83b of the horizontal partition plate 83 are connected to form a kind of partition, which is the bottom plate 1.
Front cover 11 rising from the front side flange of 03
1 and the front end portions of the heat insulating structures 56a and 56b cooperate with each other to define the front warm air chamber 110. Forward warming room 110
Extend in the longitudinal direction over substantially the entire length of the refrigerated showcase 1. The end of the condenser chamber 100 on the compressor 85 side is closed, and an opening 113 is provided at the end of the condenser pipe 105 side. The opening 113 is further covered by a flow blocking plate 115. An opening 117 is formed in the upper end portion of the front cover 111, and the passage 12 defined between the air guide 119 and the front ends of the heat insulating structures 56a and 56b is formed.
It leads to 1. The opening ratio of the opening 117 becomes smaller toward the left side in FIG.
The warm exhaust gas flowing out to 21 is evenly distributed in the longitudinal direction. Front side vertical portion 83 of the horizontal partition plate 83
In b, a horizontal narrow opening or slot 8 is provided near the opening 113.
3c is provided. In FIG. 3, it is shown by a two-dot chain line.

Returning to FIG. 5, the horizontal positional relationship between the compressor 85 and the condenser fan 89 is shown. An electrical equipment board 130 is provided in the upper chamber with a heat insulating block 65 in between.

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 condenser fan 89 is rotated, the air inside the compressor chamber 80 is sucked into it, so that the external air flows through the ventilation port 9 of the rear cover 8. Come on. That is, the external air flows in through the ventilation port 9, flows around the compressor 85, and reaches the compressor 85 before reaching the fan 89.
To cool.

The air flowing downwards by the fan 89 and flowing into the condenser chamber 100 flows between the condensing pipes 105 and removes heat from the refrigerant to condense it. A part of the air, that is, warm air, which has taken up the heat of condensation to raise its temperature, flows out laterally through the opening 113. The remaining warm exhaust gas flows into the lower part of the front warm air chamber 110 through the opening 83c, passes through the opening 117 of the front cover 111, flows upward into the passage 121, is guided by the air guide 119, and is guided by the windshield of the display room 2. It flows out along the outer surface of 33. The ratio at which the opening 117 is provided in the front cover 111, that is, the opening ratio is set as described above,
Since the warm exhaust air flows evenly on the outer surface of the windshield 33, the fog is appropriately 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. Further, the opening 117 may be a plurality of square holes or elongated slots, which can be appropriately selected.

[0029]

As described above, according to the present invention, the front chamber into which water easily enters during cleaning is completely partitioned by the partition wall from the upper chamber in which electrical components such as a cooling fan and an electric equipment board are installed. The bottom of the anterior chamber is relatively lower than the upper chamber. Therefore, even if the wash water flows into the front chamber, the electric components in the upper chamber are not flooded, and the electric accident due to flooding is completely prevented.

[Brief description of drawings]

FIG. 1 is a front perspective view of a refrigerating showcase 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 longitudinal sectional view of the refrigerated showcase taken along the line III-III in FIG.

4 is a vertical longitudinal sectional view taken along 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.

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

[Explanation of symbols]

 1 Refrigerator Showcase 2 Display Room 3 Machine Room 33 Windshield 60 Cooler Room (Upper Room) 61 Cooling Fan 63 Cooler 65 Insulation Block 80 Compressor Room (Upper Room) 81 Support Partition 83 83 Horizontal Partition Plate (Separate Room) 85 Compressor 89 Condenser fan 93 Shroud 100 Condenser chamber (lower chamber) 103 Bottom plate 105 Condensing pipe (condenser) 110 Front chamber or front warm air chamber 113 Opening 117 Opening 121 Air passage

Claims (1)

[Claims] 1. In a refrigerated showcase in which an upper display room and a lower machine room are overlapped with each other, and warm exhaust air is blown out along the outer surface of the windshield of the display room, the air passage for blowing out the warm exhaust air is communicated. Defining a front chamber over the entire front of the machine room, a cooler, a cooling fan,
An upper chamber of the machine room for accommodating a compressor, a condenser fan and the like is defined behind the front chamber with a partition wall sandwiched therebetween, and a condenser is disposed in a lower chamber below the upper chamber. A machine room structure for a refrigerating showcase, characterized in that a flow path of equipment cooling air driven by a fan is formed from the upper chamber through the lower chamber to the front chamber.