JPH03274370A - Refrigerator - Google Patents

Abstract

PURPOSE:To prevent harmful ice formation in a cooling chamber by a method wherein either a metallic thermal conductive plate having a thermal conductive resiliency or foil is adhered onto a drain pan mounted on a wall surface of a thermal insulating box and it is pressure-welded to a defrosting heater. CONSTITUTION:Either a metallic thermal conductive plate having a thermal conductive resiliency or a foil 18 is extended from a louver 16 in which drain water is iced onto a surface of a drain pan 15, and adhered and fixed so as to be closely contacted with a defrosting heater 11. The defrost heater 11 disposed in a thermal insulating box 8 and having a separate type evaporator 10 transmits heat to the drain pan 15 through the metallic thermal conducting plate having a thermal conducting resiliency or a foil 18 and then an occurrence of ice prohibiting the cooling chamber 14 and an air passage is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a refrigerator having a refrigeration device on the top wall of an insulated box body such as a refrigerator.

2. Description of the Related Art Conventionally, in order to improve the transportability of large commercial refrigerators, a construction in which a refrigerating box body and a unit part are separated has often been used in refrigerators (for example, Japanese Patent Publication No. 62-40639).

An example of the conventional refrigerator mentioned above will be described below with reference to FIGS. 3 and 4.

Reference numeral 1 denotes a vertical refrigerator used in cooking areas such as restaurants, and the main body is composed of a vertically long insulating box 3, which has a plurality of refrigerating chamber fields 2a and 2b each made of a heat insulating material at the front opening. A unit pedestal 7 having a heat insulating layer on which a compressor 4, a condenser fan 5, and a condenser 6 are installed is disposed on the upper surface of the main body.

8 is an outer box 8 having an opening in the ceiling that penetrates the inside and outside of the refrigerator.
A refrigerating chamber 9 is constituted by a heat insulating box body made of a foamed heat insulating material 8C filled between the inner box 8a and the inner box 8b and both boxes 8a and Bb. In the ceiling opening of the heat insulating box 8, an evaporator 10 is installed on the underside of the unit base 7, a defrost heater 11 is installed on the underside of the evaporator 1o, and a cooling fan 12 is installed on the front of the evaporator 10. A partition wall 13 surrounding the cooling fan 12 is attached. The ceiling opening 9 constitutes a cooling chamber 14 for generating cold air. A drain pan 15 for receiving drain water falling from the evaporator 10 and a louver 16 for discharging cooled air are provided at the lower part of the cooling chamber 14.

Reference numeral 17 denotes a holding fitting for the drain pan 15 attached to the heat insulating box body 8. If the refrigeration cycle is operated under such conditions,
The cold air heat-exchanged in the evaporator 10 is forcedly circulated by the cooling fan 12 as shown by the arrow in FIG. 2 to cool the refrigerator compartment 9.

The function of the refrigerator configured as described above will be explained below.

A compressor 4, a condensing fan 6, a condenser 6, and an evaporator 10 are mounted on the bottom surface of the pedestal attached to the unit pedestal 7.
The defrost heater 11, cooling fan 12, and partition wall 13 are configured to be able to be separated from the heat insulating box 8. When the refrigerator is installed, the units are removed and transported separately, making the transport process easier. In addition, since the drain pan 15 is attached to the heat insulating box 8, there is no need to move it when the unit is removed, and it serves as a distribution channel for defrosting water and constitutes a circulation wall that partitions the cooling chamber.

Problems to be Solved by the Invention However, in the above configuration, the evaporator 10, the defrost heater 11 disposed in the evaporator 10, and the drain pan 16 attached to the heat insulating box are attached to separate support walls 13. Due to variations in installation, a gap occurs between the defrost heater 11 and the drain pan 15, and the heat from the defrost heater 11 is not transferred to the drain pan 15, causing the cooling water to freeze and form ice on the drain pan 15, which causes the cooling air path to deteriorate. This had the problem of limiting the

The present invention solves the above-mentioned conventional problems by keeping the defrost heater and drain pan in close contact with each other at all times to prevent ice from forming through heat conduction.

Means for Solving the Problems In order to achieve this object, the refrigerator of the present invention has a configuration in which a metal heat conductive plate or foil having good thermal conductivity and elasticity is provided on the upper surface of the drain pan, and is in close contact with the defrost heater at all times. It is equipped with the following.

According to the present invention, with the above-described configuration, frost generated on the drain pan is melted by heat transfer between the drain pan and the defrost heater disposed in the evaporator via the thermally conductive metal plate. , ice will not develop and will not limit the cooling air path.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. Components that are the same as those in the conventional example are designated by the same reference numerals, and detailed explanation thereof will be omitted.

Reference numeral 18 denotes a metal heat conductive plate or foil having good thermal conductivity and elasticity, and is fixedly attached to the upper surface of the drain pan 16 so as to extend beyond the louver 16 where drain water freezes and to bring it into close contact with the defrost heater 11.

The function of the refrigerator configured as described above will be explained below.

A separate unit evaporator 10 installed in a heat insulating box 8
The defrost heater 11 provided in
This prevents the formation of ice that would limit the cooling chamber 14 and air passages.

As described above, according to this embodiment, the defrost heater 1
Even if a gap occurs between the drain pan 16 and the drain pan 16, the heat is conducted through the metal heat conductive plate or foil 18, which has thermal conductivity and elasticity, preventing the generation of harmful ice. Secured.

Effects of the Invention As described above, the present invention has a structure in which a metal thermally conductive plate or foil having good thermal conductivity and elasticity is attached onto a drain pan installed on the wall surface of a heat insulating box, and the plate or foil is brought into pressure contact with a defrost heater. With this configuration, the heat from the defrost heater is reliably transmitted to the drain pan, and cooling power can be ensured to prevent harmful ice from forming in the cooling chamber.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a cold wire device of a refrigerator according to an embodiment of the present invention, Fig. 2 is an enlarged view of the main part of an evaporator according to an embodiment of the present invention, and Fig. 3 is a perspective view of the refrigerator main body showing a conventional example. FIG. 4 is a sectional view of a conventional refrigerator refrigeration device. 7...Unit pedestal, 8...Insulation box, 10...Evaporator, 11...Defrost heater, 12...Cooling fan , 13...
...Partition wall, 15...Drain pan, 16...
...#-c, 18... Heat conduction plate.

Claims (1)

[Claims] a heat insulating box with an opening penetrating through the ceiling; a unit pedestal attached to the upper surface of the box; an evaporator attached to the lower surface of the unit pedestal; a defrost heater attached to the lower surface of the evaporator; A cooling fan disposed around the evaporator, and a partition wall surrounding the cooling fan, and
The box body includes a drain pan and a louver provided at the front part of the drain pan, and a metal thermally conductive plate or foil having good thermal conductivity and elasticity is press-connected to the defrost heater on the upper surface of the drain pan. A refrigerator characterized by being equipped to.