JPH0330071B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigerator in which a low-temperature air curtain is formed at the front of the inside of the refrigerator.

(b) Prior art The insulating multi-layered glass window structure described in JP-A No. 52-61345 is arranged so as to provide visibility between the low temperature region and the warm region, and at least the first and second holding a glass plate, the outer surface of the first glass plate being exposed to humid air in a warm region during use;
In an insulating multiple glass pane window structure, the second glass pane faces the unexposed surface of the first glass pane and is spaced from it, and the first glass pane is provided with an electric heating means. This is a configuration in which a substantially transparent infrared reflective coating is provided on the second glass plate.

(c) Problems to be Solved by the Invention In the above-mentioned conventional technology, since the electric heating means and the infrared reflective coating are separated by a space, the heating effect by the electric heating means is applied to the first glass plate and other parts. ,
Since the heating effect also extends to the space, the heating effect is wasted, and the capacity of the length heating means for heating the space becomes large, resulting in an increase in electricity costs.

The present invention aims to solve the above problems.

(d) Means for Solving the Problems In order to achieve the above object, the present invention comprises a main body with an insulating wall with a front opening, and a partition plate and a wind direction plate are arranged from the inner wall of the insulating wall, so that the inside of the refrigerator can be improved. , a cold air passage in which a cooler and a blower are placed, and an air outlet and a suction opening facing each other at both upper and lower ends of the front front of the refrigerator, and a plurality of transparent plates arranged in parallel, and a plurality of transparent plates interposed between the transparent plates. A spacer that forms a closed space where no convection occurs;
An insulating air layer made of dry air sealed in this sealed space, an anti-condensation heater disposed on the insulating space layer side of the transparent plate on the outside of the refrigerator, and a side surface of the anti-condensation heater inside the refrigerator. A transparent door made of overlapping heat-reflecting transparent coatings is installed on the front of the main unit.

(e) Effect According to the above configuration, since the anti-condensation heater and the heat-reflecting transparent coating overlap, the heat-reflecting transparent coating absorbs most of the infrared rays of the radiant heat from the outside of the refrigerator to the inside of the refrigerator via the transparent plate. Since most of the infrared rays of the radiant heat directed into the refrigerator from the anti-condensation heater are directly reflected to the outside of the refrigerator, the temperature of the transparent plate that absorbs the reflected infrared rays can be further increased.

(F) Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 refers to a refrigerator called a reach-in case, whose main body is composed of a heat insulating wall 2 with an open front. A refrigerator interior 5 comprising a plurality of shelves 4 with partition plates 3A and wind direction plates 3B arranged at appropriate intervals from the inner wall of the insulation wall, a cold air passage 8 in which a cooler 6 and a blower 7 are installed, and the refrigerator Air outlet and suction ports 9 and 10 facing each other are formed along the upper and lower edges of the front surface of the interior, and a compressor 1 that constitutes a refrigeration cycle together with the cooler is provided in a machine room 11 formed at the bottom of the main body.
2. A condenser 13 and a blower 14 are arranged,
By forcefully circulating the cold air heat-exchanged by the cooler 6 using the blower 7 as shown by the arrow, a low-temperature air curtain AC is formed to cool the inside 5 of the refrigerator. 15
1 is a rotating transparent door that freely opens and closes the front opening of the main body, and is composed of a transparent wall 16 and a frame member 17 with a handle 17A that fits around the peripheral edge of the transparent wall. The transparent door includes transparent plates 18A, 18B, and 18C made of three transparent glasses arranged in parallel,
A mouth-shaped spacer 19A, 1 that is interposed between these transparent plates and forms a sealed space several mm wide between each transparent plate.
9B and insulating air layers 20A and 20B made of dry air sealed in the sealed space, and as shown in FIG. A dew-proof heater 21 made of a heating source film is attached with a transparent adhesive or the like, and a transparent resin base 22A such as polyester is attached to the side of the heat-insulating air layer of the dew-proof heater.
and a heat ray reflective layer 22B made of silver, titanium oxide, etc.
The base layer of the heat-reflecting transparent coating 22 consisting of the above is laminated and adhered with a transparent adhesive or the like. This heat-reflecting transparent coating blocks most of the ultraviolet rays that enter the transparent plate 18A, transmits visible light, and
It has a selective reflection/transmission function that reflects infrared rays. 2
Reference numeral 3 denotes an illumination light such as a fluorescent light, which is disposed between the wind direction plate 3B and the transparent door 15, and illuminates the inside 5 of the refrigerator.

According to such a configuration, the wind direction plate 3B is connected to the cold air passage 8.
Not only does it direct the cold air flow from the refrigerator to the front of the refrigerator interior 5, but it also serves as a spacer that provides a sufficient distance between the transparent door 15 and the low-temperature air curtain AC, thereby preventing the illumination light 23 from being cooled by the cold air flow. At the same time, it is possible to prevent the occurrence of the Coanda effect of the low-temperature air curtain AC on the inside side of the transparent door 15. Therefore, the illuminance of the illumination lamp 23 is not reduced, and the cooling of the transparent door 15 from the inside side of the refrigerator can be reduced, and the refrigeration load inside the refrigerator 5 can be reduced. Furthermore, the heat-reflecting transparent coating 22 immediately reflects most of the infrared rays of the radiant heat directed from the outside of the refrigerator to the interior 5 of the refrigerator via the transparent wall 16, and most of the infrared rays of the radiant heat directed toward the interior 5 of the refrigerator from the anti-condensation heater 21. Therefore, the temperature of the transparent plate 18A that absorbs this reflected infrared rays can be further increased. As a result, most of the infrared rays of the dew-proof heater 21 can be combined with infrared rays from outside the refrigerator and used only for heating the transparent plate 18A on the outside of the refrigerator, so the dew-proof heater 21 with a small heat generation capacity can be used, and Inner transparent plates 18B, 18C and heat insulating air layer 20
The heating of the anti-dew heater 21 for A and 20B is almost eliminated, and the refrigeration load can be reduced together with the power saving of the anti-dew heater 21 without significantly impairing the see-through effect of the interior 5. In addition, the heat insulating air layers 20A, 20B
Since this prevents convection of dry air, heat transfer between the transparent plates 18A, 18B, and 18C due to convection can be prevented.

(G) Effects of the Invention According to the present invention described above, the temperature of the transparent plate on the outside of the refrigerator is increased by directly reflecting infrared rays of radiant heat from the outside of the refrigerator or from the anti-condensation heater to the outside of the refrigerator with the heat-reflecting transparent coating. At the same time, the heat generation capacity of the anti-condensation heater can be reduced to prevent a drop in temperature of the transparent plate inside the refrigerator, thereby saving power.Furthermore, the heat ray reflecting function of the transparent door can further reduce the refrigeration load inside the refrigerator.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the refrigerator of the present invention, and FIG. 2 is an enlarged view of FIG. 1A. 2...Insulation wall, 3A...Dividing plate, 3B...Wind direction plate, 5...Inside the refrigerator, 6...Cooler, 7...Blower,
8... Cold air passage, 9... Outlet, 10... Inlet, 15... Transparent door, 18A, 18B... Transparent plate, 19A... Spacer, 20A... Insulating air layer,
21... Anti-dew heater, 22... Heat ray reflective transparent coating.

Claims (1)

[Claims] 1 The main body is composed of an insulating wall with a front opening, and a partition plate and a wind direction plate are arranged from the inner wall of the insulating wall to connect the inside of the refrigerator, a cold air passage in which a cooler and a blower are installed, and a A plurality of transparent plates arranged in parallel to form an air outlet and a suction opening facing each other, a spacer interposed between the transparent plates to form a sealed space in which no convection occurs, and a spacer sealed in the sealed space. An insulating air layer made of dry air, an anti-dew heater disposed on the insulating air layer side of the transparent plate on the outside of the refrigerator, and a heat-reflecting transparent coating that overlaps the inner side of the anti-dew heater. A refrigerator characterized by having a transparent door on the front of the main body.