EP0878980B1

EP0878980B1 - Process to manufacture heating panels and panels obtained therefrom

Info

Publication number: EP0878980B1
Application number: EP97500191A
Authority: EP
Inventors: David Sanchez Duque
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-09
Filing date: 1997-11-11
Publication date: 2005-02-02
Anticipated expiration: 2017-11-11
Also published as: DE69732406T2; ATE288667T1; EP0878980A3; EP0878980A2; DE69732406D1; DK0878980T3; EP0878980B2; PT878980E

Abstract

A process for the manufacture of heating panels, consisting of the formation, on a flat base of insulating material, preferably micanite, ceramic or similar, of two or more conducting strips for electricity supply, for example copper, on which an insulating material is applied, preferably glass fiber, extended to the respective areas surrounding said conducting strips, after which a heat generating electroconducting paint is applied, distributed according to the sectors extended between opposite conducting strips and in contact with them. Said sectors are uniformly distributed throughout the panel surface, separated by a certain distance, connected in series or in parallel by means of said conducting strips, and over the assembly a second insulating panel with the same characteristics as the first, or optionally a strip of wood or other insulating material is fitted. <IMAGE>

Description

OBJECT OF THE INVENTION

This invention refers to a manufacturé process for heating panels, as well as the panels obtained from the implementation of said process, contributing basic novel characteristics and important advantages compared with systems known and used in the current state of the art.
More specifically, the invention develops a process to obtain a heating panel from a board based on an insulating and fireproof material, over which a series of components are applied, such as various strips of a conducting material, an insulating material such as glass fiber over the former for its protection and electrical insulation and one or more electroconducting paint films, heat generator, applied throughout prviously determined areas or sectors of the board. A second optional board, equal to the first, applied over the mentioned components, determines the formation of a heating panel constructed in a sandwich form.
The field of application of this invention obviously includes the industry dedicated to the manufacture of heating components and, especially, heating panels.

BACKGROUND AND SUMMARY OF THE INVENTION

In the current state of the art, the fact of using in certain applications electroconducting paint to induce the heating of an object, room, etc. in which it is applied is known. At present, the existence of patent number 8602344 is known, in which a heating system by means of an electroconducting coating is described, by means of which the necessity of heating a certain space is solved and for this purpose an electroconducting paint coating is applied directly over the walls, ceiling, etc. of the space to be heated and afterwards, two cables are fitted to the ends of the coated area and in contact with the electroconducting coating, across which a supply voltage is applied to said coating, inducing the emission of heat by means of the transformation of the supplied electric energy into heating energy.
This system, although it may satisfy the purpose for which it has been developed, is not free from disadvantages, like, for example, the fact of applying directly the paint to the walls, with the resulting investment of time and manpower or even the care that should be placed in the application of said coating to maintain the best and most uniform resistance possible.
Therefore, there is a need to provide some other component, whose installation is easier and which in turn is more flexible and versatile regarding the possibilities of use.
U.S. Patent No. 5.391.861 describes a heater comprising an electrically insulating board in which two transversally separate electrically conducting strips have been incorporated and connected by means of plurality of longitudinally separated resistors, these constituting the generating heat elements when they are electrically fed.
British Patent No. GB-1 354 703 describes a method and device for producing of electrically conducting coatings intended for to provide a coating on a wall by using an electrically conducting coating material expended between electrodes attached to the wall.
French Patent No. FR-2 484 180 describe a radiating heating device which includes an active surface in a radiant panel, whose active surface has been arranged in a sandwich manner between a reflecting layer formed by the forward face of a rear panel and a radiant frontal panel, said active surface being obtained by means of a homogeneous layer formed with a material deposited in flowing state, as a painting manner.
This invention proposes as the main purpose the development of a process for constructing a heating panel that may be executed simply and rapidly, and by means of which, as the end product, a panel is obtained, which is light, manageable, of reasonable cost and especially guarantees the user an electrical insulation permitting its handling, installation and operation without any risk of electric discharge.
Accordingly, the above-cited aims are met by providing a process for manufacturing heating panels as described in claim 1 and by a heating panel as described in claim 3.
The characteristics distinguishing said process basically consist of the arrangement of a base board made of an insulating material like, for example, micanite, in a further layer a coating that is a good electricity conductor, for example, one based on copper, forming longitudinal strips, after which in the following stage a coating material is applied to protect and insulate said strips, of an insulating material, like, for example, one based on glass fiber or a similar material, applying it at least over the areas surrounding the mentioned conducting strips; then, in the following stage, an electroconducting paint is applied on different previously determined surface areas and on the strips of conducting material and the areas of insulating material covering the former, in electrical contact with the conducting strips; the last stage of panel construction consists of the arrangement of a second base board of insulating and fireproof material, preferably of the same material as the former, attached to its face over which the coatings have been made, which it hides or houses sandwichwise, to protect them against any manipulation or external agent.
The obtained panel therefore has some sectors coated with electroconducting paint, transmitters of heat when an electric current is made circulate through the same, due to the characteristic of electrical resistance of said paint, joined near the end of the respective conducting strips (of copper), through which a supply voltage of a predetermined level is applied, preferably from the mains, said sectors advantageously consisting of superficial parts, generally rectangular, arranged parallel to each other, separated by a certain distance and distributed preferably uniformly throughout the surface of the base board. The supply strips will be arranged as demanded by the type of connection to be established between following sectors of electroconducting material, that is, due to the fact that according to the invention the mentioned sectors may be electrically connected to each other in series, each one of the strips will consecutively be connected to the alternate ends of each two consecutive sectors in the second case.
Preferably, the supply of each panel will be executed at a voltage of 220 V, so that the heat generating paint sectors will be calculated to support said voltage.
Once the second micanite (or other non-conducting fireproof material) board has been installed over the first, only those openings necessary to execute the electric connections corresponding to the electricity mains will be visible. The panel obtained in this way may be installed directly over any surface to be heated, without having to carry out any works or conditioning of said surface.
In a more simple variation of the invention, the perfected heating panel, purpose of the invention, is constructed from a substrate, generally micanite or any other type of fireproof material, which does not conduct electricity, over which an electroconducting paint is applied over a predetermined area, specifically covering the pre-delimited areas of the substrate.
By means of some strips, made of copper or any other suitable material, the areas coated with the electroconducting paint are interconnected and the ends of said strips are used as connection points to the mains.
Optionally, thermostats and adjustment components may be incorporated, so that once the temperature predetermined by the user has been reached, the passage of energy to the electroconducting areas is stopped and the latter, on not receiving energy, cut their action. The external areas of the substrate are provided with a suitable coating, such as fine strips or panels of wood or similar, or another material permitting the extrapolation of the heat generated towards the exterior.
Evidently, the conducting strips manufactured with copper will be duly insulated and protected by means of a glass or mineral wool coating, it being possible to use the insulating materials considered best for the application in question.

BRIEF DESCRIPTION OF THE DRAWINGS

The following detailed description for the purpose of the invention refers to the attached drawings, which as an example and without a limiting character whatsoever, represent a preferable form of embodiment. In said drawings:
Figure 1 shows a schematic view of a heating panel, and
Figure 2 shows an embodiment for a panel in accordance with the present invention.

DESCRIPTION OF THE PREFERRED EMDODIMENT

In figure 1 a board 1, represented in a schematic way, supports on one of its sides the different coatings incorporated to obtain the final panel.
The process has foreseen the preparation of a base board 1, manufactured in a suitable insulating and fireproof material, such as micanite or any other of similar characteristics, as has been mentioned previously, on which areas are selected for the application of an electricity conducting material in the following stage, like, for example, copper, forming the strips 4, 5, to conduct electricity when connected to a power source, such as the electricity mains, and then being applied a coating of suitable insulating material, such as, for example, glass fiber, covering said strips and extended to areas 2,3 which widely surround the mentioned electricity conductor strips 4,5. The following stage consists of the formation of a predetermined number of sectors 6, using an electroconducting paint, capable of generating heat due to its resistance when a current of electricity is passed through it, and in a way that the parts corresponding to the end edges of said sectors lean on (and also are in electric contact with) the mentioned electricity conducting strips 4,5.
According to the preferable representation of figure 1, both areas 2,3 of glass fiber and the conducting strips 4,5 have been arranged near the larger sides of a base board 1, which has a rectangular shape, parallel to said edges. The sectors 6 of heat generating electroconducting paint are arranged in the transverse direction of board 1, parallel to each other, and separated by a certain distance. As can be seen, sectors 6 receive electricity supply in parallel from the copper strips 4,5, that is, the ends of a same side receive supply from the corresponding strip 4 and the ends of the opposite side receive it from strip 5, once both strips are connected to the electricity supply, preferably to the electricity mains. The second board (not represented), of the same fireproof material as the first, once connected to the described assembly, hides all the conducting and heat generating parts, so that the assembly may be handled completely normally and fitted on the surface to which it is desired to transmit the generated heat.
Referring now to figure 2, the representation of an execution of the panel following the invention can be observed, which as a whole has a simplified geometry and finish as compared with the panel of figure 1. In fact, to achieve this heating panel, the base is a substrate 1 of micanite or any other suitable material such as ceramic or any fireproof and non-electricity conducting material, a coating of electroconducting paint, forming determined areas 7, which are interconnected by copper strips 8, duly insulated with an appropriate material 9, obtaining that the copper strips 8 generate the communication of the areas 7 coated with electroconducting paint obtaining as a result of the connection of the strips 8, to the mains, by means of the connections 10 with or without the collaboration of a thermostat or suitable adjuster, that the paint acts as a resistance generating heat towards the exterior, and finally the two faces of the substrate 1 being externally covered with wooden panels or strips, which decorate the perfected heating panel 1 allowing its suitable attachment on a surface, it likewise being possible to omit the incorporation on one of the external wooden panel faces, only covering the seen face, permitting the incorporation of one or several panel units in a house, industrial premises, cattle or farming installations, evidently generating a heat which reaches a predetermined temperature according to the required application.
As will be appreciated, in the case of the simplified execution of figure 2, the covered areas 7 are connected in series by means of the conducting strips 8.
It is not considered necessary to extend the contents of this description further for an expert in the matter to understand its limits and advantages derived from the invention, as well as to develop and perform the purpose thereof.

Claims

A process for manufacturing heating panels able to be installed on any surface to be desirably heated, comprising the following process steps:

preparing a first base board (1), or substrate of a fireproof insulating material, preferably micanite, ceramic or similar;

applying to said first base board (1) a coating layer of an electricity conducting material, for example copper, forming at least two longitudinal strips (8);

applying over the areas surrounding said longitudinal strips (8) a coating of insulating material (9), for example glass fiber; and

applying over selected areas a coating layer of heat generating electroconducting paint forming sectors (7) in such a way that they are in electrical contact with said longitudinal strips (8);

characterised in that
said longitudinal strips (8) and said sectors (7) are applied in such a way that the sectors (7) are connected with each other in series; and in that
a second base board of a fireproof insulating material is attached to the face of said first base board (1) over which the coatings have been made, and hiding them sandwichwise.
A process according to claim 1 wherein strips of insulating material are applied to said second base board for their superimposition on said longitudinal strips (8) coated on said first base board (1).
A heating panel for generating heat and being able to be installed on any surface to be desirably heated, comprising:

a first base board (1) or substrate of a fireproof insulating material;

at least two electrically conducting longitudinal strips (8) formed on said first base board (1); and

a number of transverse sectors (7) made of heat generating electroconducting paint, formed on said base board (1) and whose ends are in electrical contact with said longitudinal strips (8);

characterised in that
each sector (7) is connected with each other in series; and in that
the heating panel further comprises a second base board of a fireproof insulating material attached to the face of said first base board (1) where said strips (8) and said sectors (7) are formed, for housing them sandwichwise.
A heating panel according to claim 3 wherein it further comprises
electrical supply means, preferably mains supply, connected to said sectors (7) with electroconducting paint, for producing heat generation; and
adjustment and control means, such as thermostats and others, for adjusting and controlling said heat generation.
A heating panel according to claims 3 or 4 wherein it further comprises a strip of non-conducting material, such as wood, for covering the panel on one or both faces.