JPH02225986A - Low temperature display case - Google Patents

Abstract

PURPOSE:To remove dew of a housing part without the need of a particular heating means by introducing only air discharged after the air is warmed by heat exchange with components of a machine part into an illumination part through a warm air passage. CONSTITUTION:The outside air taken in a machine house 40 is warmed by heat exchange with mechanical components in the machine house to be discharged out of the machine house, and part of this outside air is allowed to collide with the lower part of a rear cover 43 to be introduced into a space to be carried into a door housing part 25 or further into an illumination part 26 through it so as to be allowed to be discharged in and below the illumination part 26. At this time, the air gradually evaporates and gasifies as the air is brought into contact with the surface of dew which adheres to an exhaust pipe 28 of a space P and the ceiling wall of the door housing part 25, namely, the bottom wall 3E, a lower face and the like of an insulating wall 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] Industrial Field of Application The present invention relates to a low-temperature showcase that efficiently utilizes warm air generated from a mechanical part during cooling operation.

Conventional technology A partition wall is provided that extends forward from the back wall of an insulating wall that opens at the front and partitions the inside of this insulating wall into upper and lower parts, and has an upper storage chamber that has a front opening and can be cooled by a cooler using a forced cold air circulation method. , as a low-temperature showcase with an upper opening and a lower storage chamber that can be completely cooled by a cooler.
Japanese Patent No. 2-1518 discloses a method for effectively disposing of dew generated by cooling operation in an upper storage chamber.

Problems to be Solved by the Invention Not only in the above publication, but in these showcases, fluorescent light is used as a lighting device between the upper storage chamber and the lower storage chamber, that is, below the partition wall, to illuminate the lower storage chamber. In addition to arranging lights, it is common practice to form a door storage section below the partition wall that stores the sliding door of the lower storage room when it is opened. Since a fluorescent light is disposed in the lower storage compartment, this door storage compartment is likely to become completely cooled due to the influence of cold air accompanying cooling of the lower storage compartment and storage of the cooled door. In addition, this door storage area is easily infiltrated by outside air, so dew tends to occur in this door storage area, although it is difficult to see from the outside. The only heat that can be supplied is the heat that tends to be concentrated in the front part of the door storage area due to the lighting of the door storage area, and it is impossible to remove the dew from the door storage area. This required the provision of heating means such as a dew heater.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a showcase in which dew can be removed from the door storage portion without requiring any special heating means.

[Structure of the invention]

Means for Solving the Problems The present invention provides a lower storage section whose upper front half is open, an upper storage section which is positioned above the lower storage section and whose front surface is open;
A lighting section that is located between an upper storage section and a lower storage section and has a lighting device, and a mechanical section that has a compressor and a condenser that constitutes a part of a cooling device that cools both storage sections. It provides a low-temperature showcase with a warm air passageway that guides the warm air generated in the mechanical part to the lighting part.

By guiding the amount of air that is warmed by heat exchange with working mechanical parts and then exhausted to the lighting section through the hot air passage, the exhaust air is used effectively and the lighting section is well ventilated. ing.

EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1 to 5.

1 is an upper case 4 serving as an upper storage section composed of a heat insulating wall 3 having an opening 2 for storing and taking out products on the front surface, and a heat insulating wall 6 having an opening 5 for storing and taking out products on the top surface.
This is a so-called dual-type low-temperature showcase whose main body is comprised of a lower case 7 as a lower storage section.

The upper case 4 is provided with two transparent doors 11 on the front surface of the heat insulating wall 3, which are rotatably supported by a pair of upper and lower hinges 10 and have handles 11A for freely opening and closing the opening 2. A storage room (used for freezing in this example) 1 equipped with a plurality of shelves 14 and a fluorescent light 15 as an illumination device, with metal partition plates 12 and bottom plates 13 arranged at appropriate intervals from the inner surface of the refrigerator.
6, a cold air passage 19 in which a plate fin type cooler 17 and a blower device 18 are installed and formed by the partition plate 12, the bottom plate 13, and the heat insulating wall 3, and a Suita that faces each other along both upper and lower inner edges of the opening 2. An opening 20 and a suction opening 21 are formed. In addition, a sloped wall 22 is formed at the left and right ends of the opening side of the insulation wall so that the opening width is narrowed, and both ends of the air curtain in the width direction are in contact with the inner surface. In order to make the opening width of the upper case smaller than the front opening width, a transparent window (this is called a bay window) is installed at the front end of the side wall as a sloped wall that slopes inward toward the front.
The upper case 4 having the bay window is sometimes referred to as a bay window case) 22, and the air outlet 2
The air outlet 20 is formed so that the width (horizontal width) of 0 is larger than the opening width (horizontal width).

The air (this is referred to as cold air) that has undergone heat exchange in the cooler 17 is forcedly circulated by the blower 18 as shown by the thick arrow, so that the air is forced to circulate along the back surface of the transparent door 11 from the outlet 20 to the inlet 21. The storage chamber 16 is cooled by forming a flow of cool air, that is, an air curtain.

At this time, both ends of the air curtain in the width direction are in contact with the inner surface of the transparent window 22 as an inclined wall.

The lower case 7 has a top wall 6A in the rear half of the opening 5 of the heat insulating wall 6,
Transparent door 30 as two sliding doors on the left and right that can be installed in the front half so that it can be slid in the front and rear directions with an inclination toward the lower part of the load. insulation wall 6
A vibe-on-sheet type cooling device is provided as a main cooler provided on the outer surface of an inner box 32 which is an inner wall of the heat insulating wall 6. The inside of the freezer compartment 35 is cooled by natural convection of cold air that has undergone heat exchange between the container 33 and a roll bond type cooler 34 as an auxiliary cooler provided at the lower part of the ceiling wall 6A.

Reference numeral 40 denotes a machine room as a mechanical part formed at the lower part of the heat insulating wall 6, in which a first compressor 41 and a first compressor, which together with the plate fin type cooler F of the upper case 4 constitute a refrigeration cycle as a part of the cooling device, are provided. A second compressor and a second condenser (both connected to the first compressor 41 and condenser 42, respectively) constitute a refrigeration cycle together with the first condenser 42 and the main and auxiliary coolers 33 and 34 in the lower case. (not shown because they are hidden) are installed respectively.

The upper case 4 is constructed such that the front end of the bottom wall of the heat insulating wall 3 is located approximately at the center of the upper surface of the lower case 7, and the rear end of the bottom wall projects rearward from the back wall of the heat insulating wall 6 of the lower case 7. The back wall 6C of 6 and the rear cover 43 form a space P for piping and wiring, and the heat insulating walls 3 and 6 are configured to communicate with each other through their side walls. Note that the lower end of the rear cover 43 extends below the ceiling wall of the machine room 40. The front end of the transparent window 22 fixed to the front end of the heat insulating wall 3 of the upper case 4 is attached to a door support frame 23 which also serves as a door support, and the opening 2 of the upper case 4 formed by the door support frame 23 is attached to the door support. The book is closed by a transparent door 11 rotatably supported on a frame 23. Reference numeral 24 denotes a shoulder support column against which the inner surfaces of the handles 11A of both doors 11 abut.

25 is the bottom wall 3E of the upper case 4 and the top wall 6 of the lower case 7.
This is a door storage part formed between the housing 1 and A and equipped with an illumination part 26 at one corner (front part), and stores the sliding door 30 of the lower case 7. At the rear of this door storage section 25 is an upper case 4.
The lower part of the outlet pipe 27 protrudes through the bottom wall 3E so as to guide the defrosting water and other drainage water from the plate fin type cooler 17 to the outside of the upper case 4.
7 is connected to a drain pipe 28 extending through the space P to a drain tray 44 of the machine room 40. And the machine room 40 is a space P
Since this space P communicates with the door storage section 25, the warm air (referred to as warm air and indicated by a thin line arrow) generated in the machine room 40 is transferred to the exhaust port 45 at the rear of the machine room 40.
One is discharged from the rear cover to the outside of the machine room 40, and the other is guided to the illumination section 26 through the hot air passage 29 formed by the space P and the door storage section 25, which changes direction when it hits the bottom of the rear cover (indicated by the - dotted chain arrow). (shown) at a substantially constant ratio (in this example, the former: latter - 9:1 ratio).

The lighting section 26 is formed in the horizontal direction below the bottom wall 3Etr of the heat insulating wall 3, and includes a warning light 51 that is detachably attached to the clip 50, and a hinge 10 that is disposed directly below the transparent door 11. Locking groove 52 of fixed dew receiving rail 52
A flexible and translucent M4 shade 55 is disposed, the upper end of which is locked to A, and the rear end of which is locked to a fixing piece 54B of a fixing member 54 to which a clip 50 is fixed. There is. Note that it is desirable that the fixing piece 54B also have flexibility. By using the flexibility to fix the shade 55, the upper end of the shade and the locking groove 52A are fixed.
A slight gap is formed between the rear end of the shade and the fixing piece 54B, and air can circulate through this gap.

Here, the outside air taken into the machine room 40 is completely heated by heat exchange in the condenser 42 or by taking away the heat from the compressor (the temperature is around 401C as described later), and then exhausted. Air is blown toward the port 45 side. Most of the warm air can be exhausted from the exhaust port 45, but since the rear part of the machine room 40 and the space P communicate with each other and the warm air hits the lower end of the cover 43, some of this warm air is guided into the space P. (See - dotted chain line) The liquid is discharged to the outside through the door storage section, the illumination section 26 or the surroundings of the illumination section. In addition, since the warm air leaving the machine room 40 is normally heated to about 40"C when the outside temperature is 30"C, the dewdrops generated in the drain pipe 28 and the door storage section 25 are gradually evaporated and vaporized. When the fluorescent lamp is turned on, the temperature inside the lighting section is higher than the temperature of the warm air being guided. The inside of this lighting section 26 is cooled, and the inside of this lighting section 26 is heated when the light is turned off.Then, the warm air coming out of the lighting section 26 causes the exposure rail 5
It can also promote the evaporation of dew that accumulates in step 2.

According to the above configuration, the outside air taken into the machine room 40 is warmed by heat exchange with the machine parts in the machine room, and is discharged to the outside of the machine room.
3, it is guided into the space P and rises, is carried into the door storage section 25 and further into the lighting section 26, and is discharged to the lighting section 26 and below the lighting section 26. At this time, the dew gradually evaporates while coming into contact with the surface of the dew adhering to the drain pipe 28 in the space P and the top wall of the door storage section 25, that is, the lower surface of the bottom wall 3E of the heat insulating wall 3. When the warm air that has been gradually cooled down by evaporation of dew or contact with other parts is introduced into the lighting section 26, (i> If the fluorescent lamp 51 is in the lighting state, it is heated by the radiant heat from lighting. (i) When the fluorescent lamp 51 is off, the dew adhering to the inner surface of the lighting section 26 is evaporated. After this action, water droplets are discharged to the outside from the gap that will be formed around the end of the shade 55 and the door entrance portion of the door storage section 25, making it possible to remove water droplets on the surface of the sliding door 30. Therefore, the machine room 4 generated by cooling operation
0 warm air can be efficiently used to prevent dew in the door storage section 25 and the lighting section 26, and a rise in temperature within the lighting section 26 can be suppressed. Moreover, since the piping is carried out using the space P, it is also possible to heat the surface of the piping.

〔Effect of the invention〕

As described in detail above, according to the present invention, by forming a warm air passage that guides the air taken into the machine part and warmed by heat exchange with parts in the machine part to the lighting part, when the lighting device is turned on, the light is turned on. It is possible to improve the ventilation inside the lighting section so that heat does not get trapped inside the lighting section, and to prevent dew condensation inside the lighting section when the lighting section is turned off. In particular, since the air warmed in the mechanical section is dehumidified, it is possible to dehumidify the hot air passageway leading to the lighting section, and this hot air passageway can be used to treat wastewater from the upper storage section. By installing piping such as a drain pipe, it becomes possible to heat the pipe body. Further, since the warm air that would have been simply exhausted is used for dew removal and dew prevention, there is no need for special heating means for dew prevention.

[Brief explanation of the drawing]

Each figure shows one embodiment of the present invention, and FIG. 1 is A-A in FIG.
A sectional view, t$2 figure is an external perspective view of the low temperature showcase,
3 and 4 are a front view and a side view of the showcase, respectively, and FIG. 5 is an enlarged sectional view of section B in FIG. 1. 1...Low temperature showcase, 2.5...Opening,
4... Upper case, 7... Lower case, 25
...Door storage section, 26...Lighting section, P...Space, 29...Hot passage, 40...Mechanical section,
44...Exhaust port. Figure 2

Claims (1)

[Claims] 1. A lower storage section with an open front half of the upper surface, an upper storage section located above the lower storage section with an open front surface, and a lighting device located between the upper storage section and the lower storage section. and a mechanical section having a compressor and a condenser forming part of a cooling device for cooling both storage sections, the warm air generated in the mechanical section is A low-temperature showcase characterized by a warm air passage leading to the lighting section.