Background of the Invention The refrigeration appliances have a sealed unit comprising a compressor, a condenser, an evaporator and conducting tubes of refrigerant fluid connecting the compressor to the condenser, the latter to the evaporator, which is on its turn connected to the compressor. The sealed unit is usually mounted and sealed at the same manufacturing place of the cabinet into which it will be installed, in order to facilitate handling and transportation of said sealed units between their mounting station and the installation station of said cabinet.

In the constructions in which the assembly of the sealed unit occurs away from the cabinet manufacturing station, said sealed units have to be transported to said station, in order to be installed in said cabinets. With the conventional constructions, in order to transport the sealed units, each of them has to be packed in an appropriated package, involving all the components in the form they are found to be installed in a cabinet, i. e., in an operative position of refrigeration and in such a way as to protect said components.

Besides requiring a respective complex and bulky package, each sealed unit should have a structure

capable of supporting, in a safe and stable way, the evaporator which, in the operative position of the sealed unit, stays away from the compressor-condenser assembly and is affixed to the components of said assembly only by means of the conducting tubes of refrigerant fluid.

The great volume of the package required for each sealed unit results in high cost, disproportionate to the volume which is effectively used for packaging the components, making infeasible to manufacture the cabinets in stations distant from that used for mounting the sealed units.

This problem is not so critical when the sealed units have their components closer to each other, but it is very relevant when the distance between the evaporator and the compressor-condenser assembly is large, as it occurs in the vertical refrigeration appliances.

Disclosure of the Invention Thus, it is an object of the present invention to provide a construction for the sealed unit of refrigerant fluid for a refrigeration appliance of reduced cost, which permits easy transportation and handling, and which may be mounted in a station distant from the manufacturing station of the refrigeration cabinet into which it will be installed.

These and other objectives are achieved by a sealed unit of refrigerant fluid for a refrigeration appliance, comprising component parts defined by a hermetic compressor, a condenser, an evaporator and conducting tubes of refrigerant fluid connecting the hermetic compressor to the condenser, the latter to the evaporator by means of an expanding device, and connecting the evaporator to the hermetic compressor, at least one of the parts consisting of the condenser and the evaporator being defined as a prismatic body

which is at least partially tubular, said component parts of the sealed unit being relatively displaced from an inoperative position of transportation, in which the hermetic compressor and the conducting tubes remain contained within a contour defined by the contour of at least one of the parts defined by the condenser and the evaporator, to a mounting operative position in a refrigeration appliance, in which the evaporator and part of the extension of the conducting tubes connecting said evaporator to the hermetic compressor and to the condenser are displaced to a position external to said contour.

Brief Description of the Drawings The invention will be described below, with reference to the attached drawings, in which: Figure 1 illustrates, schematically and in a partially exploded perspective view, a constructive form for the sealed unit of the present invention, in the mounting operative position; Figure 2 illustrates, schematically, a perspective view of the sealed unit of figure 1 in the inoperative position of transportation; Figure 3 illustrates, schematically and in a front view, the sealed unit of figure 2; Figure 4 illustrates, schematically and in a vertical longitudinal view, the sealed unit of figure 3, in the inoperative position of transportation; and Figure 5 illustrates, schematically, an upper view of the sealed unit of figure 2.

Best Mode of Carrying Out the Invention The present invention will be described in relation to a refrigeration appliance comprising a sealed unit including component parts defined by a hermetic compressor 1, an evaporator 2, a condenser 3, and conducting tubes 4 of refrigerant fluid, connecting

the hermetic compressor 1 to the condenser 3, the latter to the evaporator 2 by means of a expanding device (not illustrated), and connecting said evaporator to the hermetic compressor 1, closing a hermetic refrigeration circuit for the refrigerant fluid.

According to the present invention, the sealed unit may be compacte, in order to present an inoperative position of transportation generally used for taking said sealed unit to a station where it will be mounted into a respective cabinet of a refrigeration appliance, and an operative position, in which it is mounted to said respective cabinet and in which the evaporator 2 is usually provided more distant from the assembly formed by the hermetic compressor 1 and the condenser 3.

In the inoperative position, the hermetic compressor 1 and the conducting tubes 4 are contained inside a structure defined by at least one of the other components defined by the evaporator 2 and the condenser 3 of the sealed unit.

According to the present invention, at least one of the parts consisting of the evaporator 2 and the condenser 3 is defined by a prismatic body, which is at least partially tubular and which defines the compact structure of the sealed unit in its inoperative position.

In the inoperative position of the sealed unit, the hermetic compressor 1 and the conducting tubes 4 are contained inside a contour defined by the contour of at least one of the parts consisting of the evaporator 2 and the condenser 3. In the construction in which one of said parts defines said contour, said part receives the other of said parts in one of the conditions of said other part being seated against and

placed within said contour.

In the illustrated solution, the hermetic compressor 1 and the conducting tubes 4 are entirely contained within the prismatic body defined by the polygonal contour of the condenser 3, against which is superiorly seated the evaporator 2. The tubes are made, for example, of a plastically deformable metallic material, such as copper or aluminum, and may include, both internally and coaxially, a capillary tube portion. In the illustrated construction, the evaporator 2 has a"U"profile and the condenser 3 a "C"profile, and the parts consisting of the evaporator 2 and the condenser 3 are dimensioned so that the evaporator 2 can be fitted in an inverted"U" position inside the condenser 3, for obtaining the inoperative position of transportation. In a way of carrying out the present invention, the evaporator 2 and the condenser 3 are of the tube-plate type.

In the operative position, the sealed unit usually has the hermetic compressor 1 and the condenser 3 closer to each other than in relation to the evaporator 2 and the conducting tubes 4 connecting the hermetic compressor 1 to the evaporator 2 are substantially elongated or placed in the vertical position, as in the case of the vertical refrigeration appliances.

In order to be placed in its inoperative position, the sealed unit has the evaporator 2 and the conducting tubes 4 conducted to the inside of the contour of the condenser 3, so that said conducting tubes 4 are disposed around the compressor, which is already disposed inside said contour. The conducting tubes 4 are previously submitted to a plastic deformation, which gives them, so that they may fit inside the contour of the condenser, a curvature and a helical profile defined as a function of the space available

inside the structure of the contour of the condenser 3.

With the construction for the sealed unit of refrigerant fluid proposed above, the volume occupied by said sealed unit is reduced, facilitating its transportation.