IE920636A1 - A ceiling radiator plate - Google Patents

Abstract

The invention relates to a radiant ceiling panel for heating rooms by means of radiant heat, consisting of an essentially plane basic plate (1) and of a plurality of ducts (2) which run parallel to the longitudinal edges (3) of the basic plate (1) and can be connected to supply and removal lines for the heat-emitting fluid. In order to increase the thermal output of such radiant ceiling panels and/or reduce their weight, the ducts (2) are designed with a cross-section which deviates from the circular shaped, the ducts (2) can be formed by pipes (5) or by shapings (7) designed in the basic plate (1) and covers (8) closing these shapings (7) to form a pipe-like cavity.

Description

This invention relates to a ceiling radiator plate for space heating by means of radiant heat, consisting of a substantially flat basic plate and a plurality of channels which extend parallel to the long sides of the basic plate and can be connected to supply and return pipes for the heat-emitting fluid.

Ceiling radiator plates of this type are known in various designs. They are used especially for the heating of large indoor spaces, as for example assembly factories, storage sheds, multiple-vehicle garages, workshops, supermarkets and sports centres.

In the known ceiling radiator plates of the type just described, the channels are formed from pipes of circular cross-section which are fitted into prepared recesses in the basic plate, and whose surface is enveloped as closely as possible by the material of the basic plate, in order to achieve good heat transfer between the pipe material and the material of the basic plate.

Starting from this known state of the art, the problem the invention seeks to solve is to enlarge the heat-conducting contact surface between the exterior of the channels and the corresponding counter-surface of the basic plate, for the purpose of improving heat transfer between the fluid flowing in the channels and the basic plate.

The solution of this problem by the invention is characterized in that the channels are designed to have a cross-section which deviates from the circular.

As a result of the cross-section of the channels deviating from the circular, the ceiling radiator plate according to the invention possesses a larger contact surface between the channels and the basic plate, in relation to the flow cross-section of the heat-emitting fluid, so that the heat transfer taking place by conduction between the fluid and the basic plate is improved. As a result of this, the number of the channels and/or the amount of circulating fluid can be reduced, associated with which there is a simultaneous saving in weight of the ceiling radiator plates in accordance with the invention, for a given heat output. Since the ceiling radiator plate are suspended on a supporting construction, the load-bearing capacity of the supporting construction can be reduced at the same time, so that altogether there is a saving in cost for a given heat output, by the use of the ceiling radiator plates in accordance with the invention.

The channels designed with a cross-section deviating from the circular can be formed in the simplest way by means of pipes disposed on the upper and/or underside of a flat basic plate. In a preferred embodiment of the invention the channels are formed by pipes disposed in prepared recesses of the basic plate having a semicircular, oval, elliptical, rectangular, trapezoidal, triangular or similar cross-section. The flow cross-section and the surface of the pipes used, as well as the ratio between them, can be adjusted in accordance with the circumstances of the case.

It is possible moreover in accordance with the invention to form the channels from prepared recesses in the basic plate and to elaborate these recesses into coverings enclosing a pipe-like hollow space, the channels in this case being likewise executed with a cross-section deviating from the circular. In this embodiment of the invention there is a further reduction in weight for the invented ceiling radiator plates, since the channels are at least partly formed directly from the material of the basic plate.

In a preferred embodiment, the coverings are provided with integral edges along which said coverings are fixed to the basic plate in fluid-tight manner, preferably by welding or soldering.

In order to achieve the necessary reinforcement or rigidity, especially when the ceiling radiator plates are of great length and width, grooves can be formed in the basic plate in manner known per se.

Various embodiments of the ceiling radiator plate according to the invention are shown in the drawings, each of which is a cross-section through the ceiling radiator plate. In the drawings: Figures 1 and 2 are two embodiments with a flat basic plate and pipes disposed on the underside thereof having rectangular or trapezoidal cross-sections; Figures 3 to 7 are five embodiments in which the channels are formed from pipes laid into prepared recesses of the basic plate, and Figures 8 to 12 are five further embodiments in which the channels a're formed from prepared recesses in the basic plate, and these recesses are elaborated into coverings enclosing pipe-like hollow spaces.

In all the embodiments the ceiling radiator plate consists of a substantially flat basic plate 1 as well as channels 2, in which the heat-emitting fluid flows, for which reason these channels 2 are connectable to supply and return pipes which are not shown in the drawings. In order to increase the stability of the basic plate 1, the latter is provided on its long sides with a U-shaped bent-back edge 3, and, if desired, is also provided with reinforcing grooves 4 of various designs.

In the first two embodiments according to Figures 1 and 2, the basic plate 1 is designed as a flat plate; pipes 5 are disposed on its underside and have a cross-section deviating from the circular. In the embodiment according to Figure 1, this pipe cross-section is rectangular; in that of Figure 2 it is trapezoidal.

In the further five embodiments according to Figures 3 to 7, the channels 2 are formed of pipes 5, which in each case are disposed within a prepared recess 6, which extends parallel to the edges 3 of the basic plate 1. The pipes 5 have a cross-section deviating from the circular, and lie in respective recesses 6 on the basic plate 1 with their major surfaces in contact therewith. While the pipes 5 according to Figure 3 have an approximately semi-circular cross-section and those of Figure 4 a cross-section corresponding to a half ellipse, the cross-section of the pipes 5 according to Figure 5 is that of a segment of a circle, and those of Figures 6 an extended oval, and those of Figure 7 a triangle.

The five further embodiments are according to Figures 8 to 12 once again show channels 2 with a cross-section deviating from the circular. In these five embodiments however the channels do not consist of pipes but of prepared formations 7 in the basic plate 1 and coverings 8, which close off the formations 7 to a pipe-like hollow space. These coverings 8 are provided with integral edges along which the coverings 8 are fixed to the basic plate 1 in fluid-tight manner, preferably by welding or soldering.

In all the embodiments there are channels 2 with a surface which is enlarged by comparison with a circular cross-section of the same flow cross-section. In this way there arises a larger contact surface between the material forming the channels 2 and the basic plate 1, so that the quantity of heat transferred to the basic plate 1 from the heat-emitting fluid by heat conduction is increased. This results either in a greater heat output of the ceiling radiator plate or the possibility of reducing the number of the channels 2 and/or the amount of the circulating fluid for the same heat output of the ceiling radiator plate.

List of reference numerals: 1. Basic plate 2. Channel 3. Edge 4. Reinforcing groove . Pipe 6. Prepared formation 7. Prepared formation 8. Covering

Claims (6)

Claims:

1. Ceiling radiator plate for space heating by means of radiant heat, consisting of a substantially flat basic plate and a plurality of channels which extend parallel to the long sides of the basic plate and can be connected to supply and return pipes for the heat-emitting fluid, characterized in that the channels are designed with a cross-section that deviates from the circular.

2. Ceiling radiator plate according to claim 1, characterized in that the channels are made up from pipes disposed in prepared formations in the basic plate having a cross-section which is semicircular, oval, elliptical, rectangular, trapezoidal, triangular or the like.

3. Ceiling radiator plate according to claim 1, characterized in that the channels are designed as prepared formations in the basic plate, and these formations extend to create coverings which enclose a pipe-like hollow space.

4. Ceiling radiator plates according to claim 3, characterized in that the coverings are provided with integral edges along which the coverings are secured to the basic plate in fluid-tight manner, preferably by welding or soldering.

5. Ceiling radiator plate according to one of claims 1 to 4, characterized in that reinforcing grooves are designed into the basic plate.

6. Ceiling radiator plate for space heating by means of radiant heat, substantially as herein described with reference to or as illustrated in the accompanying drawings.