JPH0680387B2 - Low temperature showcase - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] The present invention relates to an improvement of a dew treatment structure for guiding dew attached to a transparent door to a machine room.

2. Description of the Related Art Since the inside surface of a transparent door that sees through the inside of the storage is cooled as the inside of the storage is cooled, the outside surface of the storage is also cooled by some heat conduction, and the air inside the storage space Contact may cause condensation on the outer surface of the transparent door. The condensed dew drops gradually move downward along the surface of the transparent door, and finally fall and fall on the installation floor and parts below the transparent door, causing rust on the surface of parts and inducing dirt. Therefore, a showcase is generally provided with a dew treatment structure. As a representative, Shokai 62-1
There is a 43175 publication. This publication discloses that the dew attached to the door body is guided to the cooling chamber.

On the other hand, there is also one in which dew attached to the door body is guided to the machine room by a drain pipe.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above technique, since the dew is guided to the cooling chamber, it is cooled by the cold air flowing through the cooling chamber to form ice on the inner wall, and the inlet of the cooler in the cold air chamber. There is a problem in that the time until the frost is closed on the entrance side is shortened by adhering as frost to the side. In addition, since this cooling chamber communicates with the machine room through the drain pipe, the drain pipe is cooled by the cool air in the cooling chamber, and the dew passing through the drain pipe freezes and drainage becomes impossible, and the warm air in the machine room is warmed up. However, there is a problem in that the temperature of the cooling chamber rises because it flows into the cooling chamber via the drain pipe.

Therefore, the present invention provides a low-temperature showcase in which dew attached to a transparent door is guided to a drain pipe and a machine room without exposing to cold air.

[Structure of Invention]

Means for Solving the Problems A low temperature showcase of the present invention includes a sliding type transparent door disposed on an upper surface, and guide grooves which are located on upper left and right side walls on the left and right outer sides of the transparent door and are inclined forward and downward. A drainage pipe having one end in contact with the guide groove and the other end extending to a machine room for accommodating mechanical parts such as a compressor; and drainage pipes arranged at lower left and right front corners of the machine room, together with the other end of the drainage pipe. It is provided with a corner member having a water storage part for making a trap, and a partition member forming a space between the drain pipe and the heat insulating material.

Action Dew adhered to the transparent door is collected by the guide groove and the dew receiving part, and is guided to the machine room by the drain pipe. At this time, since the drain pipe is partitioned by the partition member with a space from the heat insulating material, this partition member acts to block the drain pipe from the cold air in the cold storage showcase, and the drain pipe is closed. It prevents the dew from forming ice on the drain pipe so that it will not be cooled easily. In addition, since a drain trap is created by the tip of the drain pipe and the water storage part, this corner member acts as a dew tray, and when the water level rises, the tip of the drain pipe is submerged and the outside air is guided from the drain pipe to the inside of the refrigerator. There is no.

Embodiments Embodiments of the present invention will be described below with reference to FIGS. 1 to 6.

Reference numeral 1 is a heat insulating box body typified by a low temperature showcase used for exhibiting and selling ice cream, sorbet, etc., and a transparent window 2 having a heater 2D for preventing dew condensation on the periphery of the upper front portion, and a first half of the upper surface. Two transparent doors 3, 2 that slide in the front-rear direction to open and close the opening can be opened and closed, and a door storage portion 4 for storing the door 3 when the transparent door 3 is opened is provided in the rear half of the upper surface. The heat insulating box main body 5 and a machine room 6 in which machine parts essential for cooling are arranged below the heat insulating box main body 5.

The heat-insulating box main body 5 stores the inner box with an appropriate space between the inner box 11 made of metal, for example, a hot-dip galvanized steel plate having an upper surface opened to define a storage chamber, and the upper box is opened. The outer box 12 is made of metal, for example, a hot-dip galvanized steel sheet, and the resin frame 13 is arranged across the upper ends of both boxes 11 and 12 and covers the upper opening of the space surrounded by both boxes. It is configured by foaming and filling a foam heat insulating material 14 such as rigid foamed polyurethane in the space of the box 1B. And that one wall surface (top surface in this example)
An opening 15 for putting in and taking out a product and a projecting wall 16 extending in the direction of the opening 15 are formed in.

The transparent window 2 is formed of a multi-layer transparent plate having a heat insulating space K, and in this example, two transparent glasses 2A are held at appropriate intervals by a spacer 2B to improve the adhesion between the two glasses 2A and the spacer 2B. For this reason, both are fixed with a sealing member 2C that has adhesiveness such as thiocol, and a heater 2D for preventing dew condensation is formed on the outer periphery of the sealing member 2C.
Are installed.

The inner box 11 includes a front-back-side-left-right-bottom wall 11A to 11E, and a pipe-on-sheet type main cooler 17 consisting of a meandering low-temperature refrigerant pipe provided on the outer peripheral surface of the inner box 11 and a rear half of the upper surface. It is arranged by a so-called roll bond method and is composed of a plate-shaped auxiliary cooler 18 provided with rising pieces on the front, back, left and right peripheral edges,
By allowing natural convection of the cool air from each cooler,
To cool.

Further, the outer box 12 has a front wall 12A on which a heat exchanger 20 as a heating element composed of a meandering refrigerant tube through which a high-temperature gas-liquid mixed refrigerant or a liquid refrigerant in a refrigerating cycle flows on the inner surface is attached with an aluminum tape. A back wall 12B having a bent side and a forward groove defined by the bent side at the upper end extending above the front wall 12A, both left and right walls 12C, and a bottom gently sloping rearward and upward. The heat exchanger 20 includes a wall 12D and an upper wall 12E which has front, back, left, and right rising pieces on its periphery and is located directly above the auxiliary cooler 18 and gently inclines rearward and downward. In order to prevent condensation on the front wall 12A. Even if an electric heater is arranged as the heating element instead of the heat exchanger 20, the same dew condensation preventing effect can be obtained.

The machine room 6 includes a lower portion of the front wall 12A of the outer box 12, lower portions of the left and right walls 12C, a bottom wall 12D, a first exhaust passage 21 which is vertically opened at an upper edge, and a portion lower than the first exhaust passage 21. And a removable cover 23 that forms a second exhaust passage 22 that is located in the front-rear direction and covers the opening for removing mechanical parts provided on the back surface of the heat-insulating box body 5, and the front of the outer box 12 that is located at the rear of the lower surface. A compressor 26, which is defined by a base 25 that forms an intake passage 24 between the lower end of the wall 12A and a main / auxiliary cooler 17 and 18, constitutes a refrigeration cycle on the base 25, and a wire fin tube type condenser. 27 are fastened to a pair of support tools provided at the front and rear edges of the intake passage 24, respectively.

Further, the door storage portion 4 is defined by a resin shade plate 30 located on the front surface, a metal ceiling wall 31 located on the upper surface, and an upper wall 12E of the outer box 12 located on the lower surface. A lighting device (32) such as a straight tube fluorescent lamp that illuminates the inside and outside is provided, and the transparent doors (3, 3) are stored when the doors are opened.

The transparent window 2 is held and fixed in the recess 8 formed in the front wall of both the inner and outer boxes in the frame 13 arranged over the upper ends of the inner and outer boxes. In order to make the right and left parts of the frame look like an arc, in this example, the first frame body 13 is configured so that the frame body is divided into three sections and the sections are combined.
A and a second frame 13B arranged at the front end of the projecting wall 16. Further, the first frame body 13A is divided into a left frame portion 40 and a right frame portion (not shown) that correspond to the left and right walls of the box body, and a front frame portion 41 that corresponds to the front wall of the box body. Since the respective frame parts are symmetrically configured such that they face each other, the left frame part 40 and the front frame part 41 will be briefly described.

The recess 8 is formed by surrounding the end portion by the front frame portion 41 and the connecting portion 47, and the front frame portion 41 inserts and holds the lower end of the transparent window as shown in the cross section of FIG. A recessed groove 42 as a groove portion for forming an insertion piece 43 that extends downward and inserts the upper end of the front wall of the inner box, and the insertion box 43 that is connected and connected to the left and right frame parts and also inserts the upper end of the front wall 12A of the outer box into the transparent window 2. A fixed piece 44 having a function as a frame is formed. Left frame part 40
Is a guide groove that is configured with an upward slope toward the rear
45 and a dew receiving portion 46 formed in the front part of the guide groove 45 for collecting dew transmitted through the guide groove and forming an opening in the lower surface.
The dew receiving portion 46 is partitioned from the dew receiving portion 46, and the connecting portion 47 is formed so as to project from the guide groove so as to connect with the front frame portion 41.

The guide groove 45 is a rail receiver 52 for holding the left rail 60.
Is formed on the inner side of the upper surface, the wiring portion 53 for processing the wiring of the electric components such as the heater for the transparent window and the fluorescent lamp is formed on the outer side of the upper surface, and the insert piece 54 for inserting the upper end of the inner box is formed on the inner side of the lower surface. There is.

Reference numeral 70 denotes a resin-made window fixing frame which inserts and holds the upper end of the transparent window 2 to fix the transparent window 2 and is covered with a hand rail 80 described later, which is arranged corresponding to the front wall of the box body. It

Reference numeral 85 is a drain pipe having one end connected to the dew receiving portion 46 and the other end extending to the machine room 6, and the other end faces a corner member 90 described later. Reference numeral 88 is a partition member that forms a space between the heat insulating material 14 and the drain pipe 85 so that the heat insulating material does not adhere to the drain pipe 85 when the heat insulating material 14 is filled between the inner and outer boxes 11 and 12. . The partition member 88 has a passage hole 89 communicating with the machine room 6.
Is formed.

Reference numeral 90 denotes a corner member disposed at the lower left and right front corners of the machine room 6, which has a bottomed container shape and has a water storage function, and a water storage section 91 that forms a drain trap together with the other end of the drain pipe 85,
Notch for overflowing water accumulated in this water storage section 91
92, an air hole 93 formed in the bottom portion for introducing the outside air toward the notch 92, and fixing portions 94 and 95 for fixing the corner member 90 to the outer box 12, the fixing member such as a screw is provided. And fix the corner member from the outside of the outer box 12.

As described above, according to the present invention, the frame body including the front frame portion 41 and the left and right frame portions 40 arranged across the upper ends of the inner and outer boxes.
On the other hand, the transparent window 2 can be held and fixed by inserting it into the groove 42 and the fixing groove 48 without using a fixing member such as a screw. The window fixing frame 70 can be installed by fitting the upper end of the transparent window into the window fixing frame 70. At this time, since the window fixing frame 70 firmly fits the upper end of the transparent window 2 by the restoring force, a fixing member such as a screw is unnecessary.

Further, by hanging the left rail 60 and the right rail from the left and right frame portions 40, respectively, and then covering the left and right rails 60 and the window fixing frame 70 with the hand rail 80, the window fixing frame 70 and the left and right The rail 60 can be fixed, and in this case also the handrail
No fixing member such as a screw is required other than fixing the 80 to the outer box 12. Therefore, the components around the transparent window 2 are fixed by a very easy method by fitting or locking, and the number of fixing members can be reduced as a whole. Also, since the heat insulating material is filled after fixing these parts, it is necessary to swell in the direction of narrowing the width of the recess or the direction of narrowing the top opening by the foaming pressure accompanying the foam solidification of the heat insulating material. Also, since the transparent window 2 acts as a reinforcing member for stopping the bulging in the recess and the handrail 80 in the upper opening, a heat insulating box body with a transparent window is obtained at the same time when the foaming is completed and the transparent window 2 is provided. Also, the problem that the handrail 80 cannot be attached can be solved.

Further, the dew adhered to the transparent door 3 is received and collected by the guide groove 45 and the dew receiving portion 46, and is guided to the machine room 6 by the drain pipe 85. At this time, since the drain pipe 85 is partitioned by the partition member 88 with the heat insulating material 14 separated from the space, the partition member 88 acts to block the drain pipe 85 from the cold air in the cold storage showcase 1. However, the drain pipe 85 is hard to be cooled so that dew does not form ice and adhere to the inner surface of the drain pipe 85. Further, the other end of the drain pipe 85, that is, the tip is provided in the corner member 90,
The water storage portion 91 of the corner member 90 and the tip of the drain pipe 85 act to form a drain trap, and the tip of the drain pipe 85 is blocked by the accumulated water to guide outside air from the drain pipe 85 into the refrigerator. I try not to. Further, since the corner member 90 is formed with the air hole 93 so as to take in the outside air toward the water storage portion 91, the outside air is also introduced into the space formed by the partition member 88 and the drain pipe 85 The outer surface can be heated. Further, the corner member 90 is fixed from the outside of (the outer box of) the showcase, and the attachment / detachment work, cleaning, and maintenance / inspection can be easily performed.

〔The invention's effect〕

As described above in detail, according to the present invention, the dew adhered to the transparent door can be received and collected by the guide groove and the dew receiving portion, and can be guided to the machine room by the drain pipe. At this time, since the drainage pipe is separated from the heat insulating material by a partition member,
This partition member acts to block the drainage pipe from the cold air in the cold storage case, thereby preventing the drainage pipe from being cooled easily and preventing the dew from forming ice on the inner surface of the drainage pipe. Also, the other end of the drain pipe is provided in the corner member, and a drain trap is made by the water storage part of this corner member and the other end of the drain pipe, and the other end of the drain pipe is blocked by the accumulated water. I try not to introduce outside air into the refrigerator.

BRIEF DESCRIPTION OF THE DRAWINGS Each drawing shows an embodiment of the present invention, FIG. 1 is a sectional view of a low temperature showcase, and FIGS. 2 and 3 are A of FIG. 1, respectively.
Section and B section enlarged sectional view, FIG. 4 is a sectional view taken along line CC of FIG. 3, FIG. 5 is an exploded sectional view for explaining fixing of a transparent window, and FIG. 6 is a perspective view of a corner member. . 1 ... Low temperature showcase, 3 ... Transparent door, 6 ... Machine room, 45 ... Guide groove, 46 ... Dew receiving part, 85 ... Drain pipe, 88 ...
… Partitioning member, 90 …… Corner member, 91 …… Water storage part.

Claims (1)

[Claims] 1. A sliding type transparent door disposed on an upper surface, guide grooves which are located on upper left and right side walls on the left and right outer sides of the transparent door, and which are inclined forward and downward, and located at a tip of the guide groove. A dew receiving portion for receiving dew, a drain pipe having one end connected to the dew receiving portion and the other end extending to a machine room for housing a mechanical component, and the drain pipe arranged at the lower left and right front corners of the machine room. A low-temperature showcase comprising: a corner member having a water storage portion that forms a drain trap together with the other end, and a partition member that forms a space between the drain pipe and the heat insulating material.