FR2605385A1 - Ash box for a closed stove (hearth) - Google Patents

Abstract

Ash box for a stove (hearth) closed by means of a door and comprising a sole (hearth floor) on which the ash box rests, this being surmounted by a grate for the fuel. According to the invention, the vertical front wall 6 of the ash box includes cross-members 8 supporting a deflector 7. Applications: increasing the efficiency of closed stoves (hearths).

Description

ASHTRAY FOR CLOSED FIREPLACE
The present invention relates to an ash pan or ashtray intended in particular, but not exclusively, to be mounted in a heating appliance called a closed hearth.

We know that compared to the traditional chimney, the closed hearths, introduced under the mantle of a chimney, allow to obtain a better output and a simplified maintenance.

Furthermore, even in traditional fireplaces, it is known to have below the grate supporting the solid fuel (wood! Or charcoal) a tank intended to collect the ashes formed during combustion.

In the case of a conventional closed hearth, a distinction is made from the bottom to the top of the hearth, the ashtray or ash recovery tray placed on the hearth, and a grate above the ashtray hung in the closed hearth by means clean. In some cases, the ashtray can take the form of a drawer located above the hearth. Combustion air enters the lower part of the fireplace. In this traditional assembly, the air tends to direct itself towards the vacuum zone which exists at the lower part of the chimney, by avoiding the obstacles, and in particular the grate, so that it circulates preferably outside of said grid. As a result, the grate and the fuel are poorly ventilated, which affects the combustion efficiency.

On the other hand, in closed hearth heating appliances, it is essential to be able to control the progress of the fire, in particular to supply it with the necessary fuel. However, the combustion produces soot which is deposited on the cold wall formed by the glass door, and tars are deposited and solidify, which produces a bistrage or opacification of the glass.

The object of the present invention is to remedy these drawbacks.

A first object of the present invention is an ashtray for guiding the combustion air in the places useful to it.

A second object of the invention is to allow the reduction of the bistrage of the door glass.

According to the present invention, the ashtray for a closed hearth is characterized in that it has, at its front part, a deflector cover which is fixed on the vertical front rim of the ashtray and which extends below the front part of the wire rack. From the front, we will hear the side arranged opposite the glass door.

Other characteristics and advantages of the present invention will appear during the description which follows of a particular embodiment, given only by way of nonlimiting example, with reference to the single figure which represents, in partially cut perspective. , an ashtray according to the invention.

We distinguish in the figure the horizontal hearth 1 of the hearth, on which the tray or ashtray 2 rests. At the front of the hearth extends vertically a door 3 which, in the example shown, is in the closed position but which can take different opening positions. Advantageously, this door 3 is at least partly glazed to allow control of the working state of the hearth. It gives off; even in the closed position, a passage 11 for the combustion air.

Above the tank 2 extends a grid 4 pierced with holes 5 and intended to receive and maintain the solid fuel. The grid 4 is suspended inside the hearth by its own means (not shown). As the combustion progresses, the ashes pass through the holes 5 to fall into the ashtray 2.

The tank 2 has a front wall 6. On this front wall comes to rest a deflector 7 which rests on the one hand on the sides of the tank 2, and on the other hand on spacers 8 allowing to clear spaces 9 between the upper part of the front wall 6 of the ashtray and the lower surface of the deflector 7. Thus, the invention consists in placing above the tank 2 a ceiling or deflector 7 provided with a vertical front edge 10. This deflector allows passage combustion air F symbolized by an arrow passing through the air intake 11 provided in front of the appliance on the door side and in the lower part of the latter. Given the geometrical configuration thus created, most of the air F1 passes below the deflector 7 and can escape from it upwards only by passing through the holes 5 of the grid.

The other part F2 of the combustion air, smaller than the first, tends to rise vertically along the door 3. This thus results in an air circulation constituting a screen avoiding the bistrage of the glass included in the door 3. The combustion air intake under the front door is thus facilitated and the combustion air F1 is well distributed under the entire grid while cooling it, which is an element favorable to the efficiency of the 'apparatus.

It goes without saying that many variants can be introduced in particular by substitution of technically equivalent means without departing from the scope of the invention.

Claims (3)

1. Ashtray for fireplace closed by a door and comprising a  floor on which said ashtray rests, the latter being  surmounted by a fuel grid, characterized by  what the vertical front wall (6) of the ashtray includes  spacers (8) supporting a deflector (7) forming a  space (9) for the passage of combustion air entering through  at least one orifice (11) for bringing it towards the  below the grid (4). 2. Ashtray according to claim 1, characterized in that the  deflector (7) extends at least below the  front part of the grid (4). 3. Ashtray according to one of claims 1 or 2, characterized  in that part (F2) of the combustion air flow is  deflected between the front face (10) of the deflector (7) and the  door (3).