RU2451884C1 - Domestic refrigerator box - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: domestic refrigerator box comprises outer and inner casings, box doors, a heat insulation filler, which is placed in a cavity between inner and outer casings, a cooling system. Inner and outer casings are connected tightly, and the heat insulation filler is made from a material with low heat conductivity in the form of cells, which adjoin the inner and outer casings of the refrigerating box and doors. Between cells there are channels - air ducts, and the cavity between casings is vacuumised.

EFFECT: reduced specific consumption of energy of a refrigerator and increased resource of cooling system operation.

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Description

The invention relates to refrigeration, and more particularly to devices for refrigerating cabinets of domestic refrigeration appliances, and can find application in the manufacture of household refrigerators and freezers, as well as display cabinets - refrigerators, refrigerators and freezers.

Known household refrigeration appliances, consisting of a refrigerator with a door and a cooling system. In these refrigeration appliances, the cabinet and doors are made of two buildings, between which thermal insulation is placed [Babakin BS, Vygodin VA. / Household refrigerators and freezers. M. 2005, 235 s]. The overall performance of the refrigeration appliance, its resource and energy consumption depend on the characteristics of thermal insulation. One of the ways to reduce heat loss is the development of a more effective heat-insulating material, which provides both the maximum possible thermal insulation and the strength properties of the system: the outer casing - heat insulator - inner casing.

Another way to reduce heat loss through the walls of the refrigeration appliance is the use of evacuation of the space between the outer and inner cases. For example, thermal insulation in the form of evacuated bags in an airtight interwall space.

In modern household refrigeration appliances, refrigerators and freezers, foam filling is increasingly being used. Filling the cavities between the outer and inner cases of the refrigerator cabinet and the doors of the refrigerator with the hardening foam of a material with low thermal conductivity provides practical rigidity of the cabinet and door structure, with a relatively small weight of the foam filler. For example, Thermoplex thermal insulation material from extruded polystyrene foam is used [http: /www.aquatrolproekt.ru/paviloni.vakuum.htm].

This heat-insulating material is characterized by strength, heat resistance, shape stability, and its thermal conductivity is equal to - 0.029 W / (m · K), with a density of 35-40 kg / m ³ . Compared to other materials, it has an advantage - in terms of thermal insulation properties: it is 2 times more effective than plates of glass staple fiber and mineral wool, 1.5-1.7 times more than expanded polystyrene.

However, heat losses through the body and doors of the refrigeration device, as before, remain relatively high, which is a disadvantage of the known designs of these devices. Especially in warm and hot conditions. These losses lead to additional compressor operation, the total resource of the refrigeration appliance is reduced, and its specific energy consumption is increased.

The objective of the invention is to eliminate the above disadvantages, namely, improving the thermal insulation of the cabinet and doors of the refrigerator, reducing specific energy consumption, increasing the life of the cooling system.

The problem is solved in that in the evacuated cavity between the outer and inner cases of the refrigerator, the heat-insulating filler is made in the form of cellular slabs adjacent to the inner and outer cases of the refrigerator and doors, with channels and ducts made between the cells.

The connection of the outer and inner casings is hermetic provides the possibility of evacuating the cavity between the casings, and the placement between the walls of the casings of a heat-insulating filler of cellular form with channels - the rigidity of the walls of the casings, preventing them from drawing closer to the cavity.

The invention is illustrated by drawings. Figure 1 shows a cross section of the refrigerator, figure 2 is a section in figure 1 on aa, figure 3 is a view In figure 1.

The inventive cabinet of a domestic refrigerator consists of an outer case - 1, an inner case - 2, tightly connected, a cabinet door with an inner 3 and an outer 4 walls, a heat-insulating filler 5 placed between the cabinet cases 1 and 2 and the door walls 3.4 and made of material with low thermal conductivity in the form of cells adjacent to the inner 1 and outer 2 cases of the refrigerator, to the inner 3 and outer 4 walls of the door, while between the cells channels are made - air ducts 7, and the cavity between the cases is evacuated. Cells can have a rectangular or hexagonal shape.

Evacuation of the cavities between the hermetically connected cases for a rectangular refrigerated cabinet will cause compressive loads on the walls of the cases, which will resist the stiffness of the insulating material in the form of cells. The dimensions of the cells and the wall thickness of the cells should be determined based on the wall thickness of the housings and the material from which these housings and the heat insulator are made, as well as on the degree of vacuum of the cavity between the housings.

The manufacturing technology of the inventive domestic refrigerator cabinet includes manufacturing cellular plates 5 from heat insulating material, placing these plates between the inner 1 and outer 2 cases of the refrigerator cabinet and between the outer 3 and inner 4 walls of the refrigerator door, sealing the cavity between the cases, vacuuming this cavity through a pre-mounted nipple. The refrigerator can also be made of rectangular evacuated panels: two panels for the side walls, separate panels for the back, top and bottom of the refrigerator, a separate panel for doors.

The technology for assembling the cabinet of the refrigeration cabinet can be as follows: - a hollow vacuum is made - a sealed housing of the refrigerator, consisting of the outer planes that make up the outer case, and the inner planes that make up the inner case; between these planes on the front side are prepared flat panels with dimensions corresponding to the dimensions of the planes for the rear wall of the refrigerator, side walls, doors, upper and lower parts of the cabinet. End openings are closed by covers in the form of pencil cases, along the perimeter hermetically attached to the walls of the filled planes.

Nipples are placed in the lids for evacuating planes filled with heat-insulating panels. Next, the evacuation of the cavities and the leak test are performed.

The declared refrigerating cabinet works as a part of other units and blocks of a household refrigerating appliance without differences from a refrigerating closet of a typical refrigerating appliance.

The implementation of the refrigerator in accordance with the claimed distinctive features will significantly reduce heat loss, reduce operating costs and increase the life of household refrigeration appliances.

The ability to vacuum the cavity between the outer and inner cases of the cabinet of a household refrigerator is provided by placing in the cavity a thermally insulating material in the form of cells, which will significantly increase the thermal insulation of the internal volume of the refrigerator from the external environment. At the same time, the total contact area of the ends of the cells with the surfaces of the enclosures is significantly smaller than the contact area of the thermal insulation, with full foaming of the inter-housing space (as in the prototype), and cells of thermally insulating material can be placed only in the middle part of the planes of the cases of the refrigerator. The use of thermally insulating material in the form of cells with subsequent evacuation of the cavity between the outer and inner cases of the refrigerator and the door will significantly reduce the overall coefficient of thermal conductivity, which will reduce heat inflows into the refrigerator and reduce energy consumption.

Claims (1)

Domestic refrigerator cabinet, including external and internal cases, cabinet doors, heat insulating filler placed in the cavity between the inner and outer cases, a cooling system, characterized in that the inner and outer cases are sealed and the heat insulating filler is made of material with low thermal conductivity in the form cells adjacent to the inner and outer cases of the refrigerator and doors, while air ducts are made between the cells, and the cavity between the cases is evacuated.

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