GB2140545A

GB2140545A - Refrigerating evaporator

Info

Publication number: GB2140545A
Application number: GB08409981A
Authority: GB
Inventors: Duilio Besson
Original assignee: Industrie Zanussi SpA
Current assignee: Industrie Zanussi SpA
Priority date: 1983-04-22
Filing date: 1984-04-17
Publication date: 1984-11-28
Also published as: GB8409981D0; GB2140545B; ES278208Y; FR2544845B3; DE8410871U1; ES278208U; IT8334019V0; FR2544845A3

Abstract

A refrigerating evaporator for chest-type freezers comprises a metal casing 20 around which a continuous pipe coil 27 connected to the compressor 31 for the refrigerating fluid is wound and fixed by means of adhesive strip, said casing being incorporated in a layer of insulating material to form the cell of a freezer, the metal sheet (20) being cut and bent so as to produce an open box-like body (21) having a substantially parallelepipedic upper portion (22) and a lower portion (23) with a vertical bevelled corner (24) to create a recess which is substantially of triangular section, within which said compressor (31) is housed. The bottom opening (28) of said body and the substantially triangular opening (29) formed in the bottom of said upper portion at said bevelled corner (24) of said lower portion are both closed off by respective panels before the evaporator is fitted into the insulating material. <IMAGE>

Description

SPECIFICATION Refrigerating evaporator The present invention relates to a refrigerating evaporator.

More particularly the invention relates to a refrigerating evaporator for chest-type freezers, formed by a metal casing, to the outside surface of which is fixed a continuous pipe coil connected to the compressor for the refrigerating fluid.

Normally, the evaporators of the above type comprise a metal sheet which is cut and bent so as to assume the cell-like form of the freezer. That results in an open box-like around which the pipe coil within which the refrigerating fluid circulates is wound, being fixed thereto by means of adhesive strip.

The form of the box-like body is such as to form a mounting seat therebelow, to permit the compressor to be housed therein.

In a known construction, the compressor mounting seat extends across the entire width of the box-like body so as to permit the pipe coil to be wound therearound by means of a simple rotary movement of the body.

In that case however the cell which is produced in that way is of reduced volumetric capacity by virtue of the substantial dimensions of the mounting seat produced in that way for the compressor.

Alternatively, the compressor could be housed in a space of substantially quadrangular section provided at a lower angle of said box-like body. In that case, there would be a substantial gain in volumetric capacity of the compartment, but the operation of winding the coil therearound would be complicated because the quadrangular space constitutes an undercut portion with sharp corners which make it necessary for the operation of winding the pipe coil to be interrupted and then resumed.

According to the present invention there is provided a refrigerating evaporator for a chest-type freezer, comprising a metal casing around which a continuous pipe coil, which in use, is connected to the compressor for the refrigerating fluid is wound and fixed by means of adhesive strip, said casing being suitable for being incorporated in a layer of insulating material to form the cell of a freezer and comprising a metal sheet which has been cut and bent so as to produce a box-like body having a substantially parallelepipedic upper portion and a lower portion with a vertical bevelled corner to create a seat which is substantially of triangular section, within which said compressor can, in use, be housed.

As will become apparent from the following description, in the illustrated embodiment, the evaporator is produced by winding the coil and fixing it, in a continuous mode of operation, said evaporator making it possible to create a mounting seat of minimum bulk for the compressor and thus to produce a refrigerating cell or compartment of maximum capacity.

The features of the invention will be apparent from the following description given by way of nonlimiting example, with reference to the accompanying drawings in which: Figure 1 is a diagrammatic view of a construction which is known in the state of the art, and Figure 2 is a perspective view from below of an evaporator according to the invention.

As shown in Figure 1,an evaporator for chest-type freezer cells or compartments is formed at the present time by a metal casing 10 around which a pipe coil 11 is wound, being fixed to the casing by means of an adhesive strip 12.

The evaporator produced in that way is then incorporated into a layer of insulating material (not shown).

As already stated, that construction suffers from disadvantages because, to permit the coil 11 to be continuously wound and to provide the lower mounting seat for the compressor, the total capacity of the cell is substantially reduced.

In contrast, Figure 2 shows the solution in accordance with the invention. The evaporator is produced from a metal sheet 20 which is cut and bent so as to form a box-like body 21 which is open at the top and bottom. The body 21 is formed by a substantially parallelepipedic upper portion 22 and a lower portion 23 having a vertical bevelled corner wall 24to provide a mounting seat which is substantially of triangular section, in which the compressor 31 is housed.

The edges of the sheet 20 are joined together in any known manner, for example by means of shaped connecting members 25 and 26 or by means of hook-like engagement at the bevelled corner 24 of the lower portion 23 and the overhanging corner of the upper portion 22.

A coil 27 for circulating the refrigerating fluid is then continuously wound around the body 21 produced in the above-described manner.

The operation of winding the coil 27 around the body 21 may be carried out in conventional manner by rotating the body 21 since the angular portion 24 does not have sharp corners or undercut portions.

At the same time as the coil 27 is wound around the body 21, it may be fixed to the body 21 by applying an adhesive strip 30.

Before fitting the evaporator into the insulating material, so as to form the cell, the body 21 is completed by closing off by means of respective panels (not shown) both the lower opening 28 and the substantially triangular opening 29 which is formed below the upper portion 22, at the bevelled corner 24 of the lower portion 23.

To conclude, the evaporator according to the invention can be produced by means of simple and conventional operations but it makes it possible to produce a cell having the maximum volumeric capacity since the mounting seat for the compressor is of dimensions that are reduced to the minimum.

1. A refrigerating evaporator for a chest-type freezer, comprising a metal casing around which a continuous pipe coil, which in use, is connected to the compressor for the refrigerating fluid is wound and fixed by means of an adhesive strip, said casing

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Refrigerating evaporator The present invention relates to a refrigerating evaporator. More particularly the invention relates to a refrigerating evaporator for chest-type freezers, formed by a metal casing, to the outside surface of which is fixed a continuous pipe coil connected to the compressor for the refrigerating fluid. Normally, the evaporators of the above type comprise a metal sheet which is cut and bent so as to assume the cell-like form of the freezer. That results in an open box-like around which the pipe coil within which the refrigerating fluid circulates is wound, being fixed thereto by means of adhesive strip. The form of the box-like body is such as to form a mounting seat therebelow, to permit the compressor to be housed therein. In a known construction, the compressor mounting seat extends across the entire width of the box-like body so as to permit the pipe coil to be wound therearound by means of a simple rotary movement of the body. In that case however the cell which is produced in that way is of reduced volumetric capacity by virtue of the substantial dimensions of the mounting seat produced in that way for the compressor. Alternatively, the compressor could be housed in a space of substantially quadrangular section provided at a lower angle of said box-like body. In that case, there would be a substantial gain in volumetric capacity of the compartment, but the operation of winding the coil therearound would be complicated because the quadrangular space constitutes an undercut portion with sharp corners which make it necessary for the operation of winding the pipe coil to be interrupted and then resumed. According to the present invention there is provided a refrigerating evaporator for a chest-type freezer, comprising a metal casing around which a continuous pipe coil, which in use, is connected to the compressor for the refrigerating fluid is wound and fixed by means of adhesive strip, said casing being suitable for being incorporated in a layer of insulating material to form the cell of a freezer and comprising a metal sheet which has been cut and bent so as to produce a box-like body having a substantially parallelepipedic upper portion and a lower portion with a vertical bevelled corner to create a seat which is substantially of triangular section, within which said compressor can, in use, be housed. As will become apparent from the following description, in the illustrated embodiment, the evaporator is produced by winding the coil and fixing it, in a continuous mode of operation, said evaporator making it possible to create a mounting seat of minimum bulk for the compressor and thus to produce a refrigerating cell or compartment of maximum capacity. The features of the invention will be apparent from the following description given by way of nonlimiting example, with reference to the accompanying drawings in which: Figure 1 is a diagrammatic view of a construction which is known in the state of the art, and Figure 2 is a perspective view from below of an evaporator according to the invention. As shown in Figure 1,an evaporator for chest-type freezer cells or compartments is formed at the present time by a metal casing 10 around which a pipe coil 11 is wound, being fixed to the casing by means of an adhesive strip 12. The evaporator produced in that way is then incorporated into a layer of insulating material (not shown). As already stated, that construction suffers from disadvantages because, to permit the coil 11 to be continuously wound and to provide the lower mounting seat for the compressor, the total capacity of the cell is substantially reduced. In contrast, Figure 2 shows the solution in accordance with the invention. The evaporator is produced from a metal sheet 20 which is cut and bent so as to form a box-like body 21 which is open at the top and bottom. The body 21 is formed by a substantially parallelepipedic upper portion 22 and a lower portion 23 having a vertical bevelled corner wall 24to provide a mounting seat which is substantially of triangular section, in which the compressor 31 is housed. The edges of the sheet 20 are joined together in any known manner, for example by means of shaped connecting members 25 and 26 or by means of hook-like engagement at the bevelled corner 24 of the lower portion 23 and the overhanging corner of the upper portion 22. A coil 27 for circulating the refrigerating fluid is then continuously wound around the body 21 produced in the above-described manner. The operation of winding the coil 27 around the body 21 may be carried out in conventional manner by rotating the body 21 since the angular portion 24 does not have sharp corners or undercut portions. At the same time as the coil 27 is wound around the body 21, it may be fixed to the body 21 by applying an adhesive strip 30. Before fitting the evaporator into the insulating material, so as to form the cell, the body 21 is completed by closing off by means of respective panels (not shown) both the lower opening 28 and the substantially triangular opening 29 which is formed below the upper portion 22, at the bevelled corner 24 of the lower portion 23. To conclude, the evaporator according to the invention can be produced by means of simple and conventional operations but it makes it possible to produce a cell having the maximum volumeric capacity since the mounting seat for the compressor is of dimensions that are reduced to the minimum. CLAIMS

1. A refrigerating evaporator for a chest-type freezer, comprising a metal casing around which a continuous pipe coil, which in use, is connected to the compressor for the refrigerating fluid is wound and fixed by means of an adhesive strip, said casing being suitable for being incorporated in a layer of insulating material to form the cell of a freezer and comprising a metal sheet which has been cut and bent so as to produce a box-like body having a substantially parallelepipedic upper portion and a lower portion with a vertical bevelled corner to create a seat which is substantially of triangular section, within which said compressor can, in use, be housed.

2. An evaporator according to claim 1 wherein the bottom opening of said body and the substantially triangular opening formed in the bottom of said upper portion at said bevelled corner of said lower portion are both closed off by respective panels before the evaporator is fitted into the insulating material.

3. A refrigerator or freezer having an evaporator comprising a metal casing around which a continuous pipe coil connected to the compressor for the refrigerating fluid is wound and fixed by means of adhesive strip, said casing being suitable for being incorporated in a layer of insulating material to form the cell of a freezer and comprising a metal sheet which is cut and bent so as to produce an box-like body having a substantially parallelepipedic upper portion and a lower portion with a vertical bevelled corner to create a seat which is substantially of triangular section, within which said compressor is housed.

4. An evaporator according to claim 3 wherein the bottom of said body and the substantially triangular opening formed in the bottom of said upper portion at said bevelled corner of said lower portion are both closed off by respective panels before the evaporator is fitted into the insulating material.

5. An evaporator constructed and arranged substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.

6. A refrigerator or freezer incorporating an evaporator according to any one of claims 1, 2 and 4.