Description

Production process of a heating radiator for indoor use and radiator obtained with said process.

The present patent application refers to a production process of a heating radiator for indoor use together with the radiator obtained with said process.

As it is known, heating systems based on high-temperature water circulation employ radiators installed in different rooms and suitably connected to water circulation systems.

Although radiators have different shapes, a common characteristic is the presence of a metal structure with serpentine for hot water circulation from the inlet nozzle to the outlet nozzle. Traditional metal radiators are still very popular, in spite of considerable disadvantages.

The first disadvantage refers to the fact that heat is always transferred by convection in the presence of a radiator with metal structure (i.e. steel, cast iron, etc.). This phenomenon creates large, unpleasant convective motions inside the room, with poor uniformity of temperatures reached in different points of the same room.

Additionally, commercially available metal radiators have standardised shapes that are no longer capable of characterising the indoor space with originality.

In view of the above, the purpose of the present invention is to devise a new type of radiators capable of providing better and more uniform heating modes in the room.

Another purpose of the present invention is to produce a radiator with an easier and more economic process compared to the one that is currently used to produce traditional iron cast or steel radiators.

As a secondary result, the study carried out to devise a radiator with

the said advantageous characteristiόs has originated a product with a different, highly innovative structure compared to traditional metal radiators.

Moreover, the radiator obtained in compliance with the present invention is also appreciated for its capability to characterise the indoor space with originality compared to the previous technique.

The radiator obtained from the process of the invention completely renounces the use of the metal structure and the traditional serpentine that is typical of all iron cast or steel existing radiators.

The present invention is based on the placement of a serpentine obtained from a polyethylene pipe inside a formwork, complete with the unions that are necessary for connection to a traditional system for hot water circulation; then, the formwork is filled with fluid mortar obtained from a mixture of suitable components to ensure good heat transmission and dissipation, until the serpentine is buried. After setting, the mortar originates a sort of rigid panel that contains the serpentine and is laterally provided with the necessary inlet and outlet unions for the water.

Evidently, the said panel is connected to the heating system by means of the said inlet and outlet nozzles. The aforementioned panel structure of the radiator of the invention, together with the use of a special mortar, guarantees more uniform and more efficient heat transfer compared to traditional radiators, thanks to the larger heat exchange surface at the same volume.

The use of the radiator of the invention reduces the unpleasant air motions that are typical of rooms equipped with metal radiators and avoids non-uniformity in the temperature values recorded in different points of the room.

The substantially "neutral" shape of the radiator obtained with the process of the invention, which basically imitates a simple concrete panel, is especially useful and efficacious to provide clean, linear shapes in modern interiors.

For purposes of clarity the description of the invention continues with

reference to the enclosed drawing, which is intended for purposes of illustration only and not in a limiting sense, whereby:

- fig. 1 is an axonometric view of the new radiator obtained with the process of the invention; - fig. 2 is the same as fig. 1 and shows the internal structure of the radiator;

- fig. 3 is the same as fig. 2 and refers to another embodiment of the process of the invention. With reference to. the enclosed figures, the process of the invention consists in the ordered sequence of the following operations:

- fixing against a section of support metal mesh (1) of a serpentine (2) with any shape and size, obtained with a high-density reticular polyethylene pipe and provided with an inlet nozzle (2a) and an outlet nozzle (2b) for connection by means of suitable unions to a traditional hydraulic heating system, and with a traditional air valve (2c);

- insertion of the metal mesh (1) and serpentine (2) fixed to it inside a formwork with preferably parallelepiped structure;

- pouring of fluid concrete mortar into said formwork until the formwork is filled and the metal mesh (1 ) and serpentine (2) are completely buried, except for the inlet (2a) and outlet (2b) nozzles and air valve (2c); it being provided that the mortar is obtained from a mixture of components able to ensure high heat transfer after setting;

- extraction of the panel radiator (R) from the formwork (3), after mortar has set;

- processing of the radiator (R) with other operations to obtain the desired surface finish and/or colour for the radiator walls. The selection of high-density reticular polyethylene for the serpentine

(2) is justified by the fact that this material has an excellent resistance to ageing and suitable characteristics in terms of weight, resistance to corrosion, low load loss, soundlessness, and great flexibility in order to allow the serpentine (2) to absorb thermal expansion. A different material can be used for this purpose, while still falling in the same inventive scope, on condition that it is provided with equivalent characteristics.

The mortar used in the process of the invention is obtained by mixing:

- cement (acting as glue)

- siliceous inert material or equivalent (able to guarantee high heat transfer)

- glass fibre designed to act as framework for the entire panel radiator (R)

- additives to improve the technical characteristics of the mixture, such as fluidizing agents and acrylic resins.

While still falling within the scope of the invention, the serpentine (2) may also be given a rigid structure, e.g. a "rack" structure, obtained by connecting different rigid pipe sections, as shown in fig. 3.