GB1584267A - Gas heating appliance - Google Patents

Description

(54) GAS HEATING APPLIANCE (71) We, ORBAICETA, S.A. Of Carrt.

Zaragoza, km.3, Pamplona, Spain, a Spanish Body Corporate, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to a gas heating appliance the main characteristics of which are easy mounting and dismantling of the functional elements thereof as well as better cooling of the hotter parts of the appliance. By the functional elements of the appliance are meant the gas burners, and gas distributing devices, together with the flow regulation valve.

Many systems are known for fixing these functional elements of a gas heating appliance to the structure of the appliance, all of which are designed to facilitate dismantling of the elements. Generally, the flow regulation valve is fixed at one side of the structure of the appliance, while at the other side the burners are fixed to a frame which, in turn, is fixed to the appliance, one of the ends of the tubes being fastened to the valve while the other end is fastened to the burners themselves. Normally this fixing frame of the burners constitutes a part of the front of the appliance, dismantling of the remaining parts of the front of the appliance normally being necessary to remove the frame in case of repair of any functional element.

Referring to the cooling of the hotter parts of the appliance, that is to say the rear part of the burners, the reason for such cooling is that the fuel supply source is constituted by a gas pump incorporated in the appliance itself. Due to risk of explosion, it is necessary to maintain the gas pump at a sufficiently lower temperature than that created by the burners in the interior of the appliance.

Conventional gas heating appliances try to maintain this temperature by means of thermal insulation constituted by an intermediate plate which divides the appliance into two independent chambers, in one of which the gas pump is placed, while the burners are placed in the other. A structure having a housing which encloses the burners, whereby the burners are doubly separated from the gas pump of the appliance, is also known. In spite of this structure, the temperature existing in the gas pump of conventional gas heating appliances is not as low as desired.

The present invention provides a gas heating appliance comprising a rear chamber housing a feed pump for gas burners of the appliance, and a front chamber housing the burners and separated from the said rear chamber by a vertical intermediate plate, wherein the burners are directly attached to a reflector plate which is itself fixed to a front panel of the appliance, the said front panel having immediately above the joining edge of the said reflector plate to the front panel a grating constituted by a plurality of tlat horizontal plates emerging from the plane formed by the front panel, a wall of the grating interconnecting the plates thereof being provided with a plurality of orifices, the front panel further having immediately above the said grating a first deflector plate extending downwards and backwards without reaching the vertical intermediate plate which separates the front and rear chambers of the appliance, and a second deflector plate generally parallel to and spaced above the said first deflector plate and also parallel to the said reflector plate, the said second deflector plate being fixed to the inner surface of the front panel, the front panel having at the zone between the said first and second deflector plates a plurality of transversally aligned orifices.

The structure of the gas heating appliance according to the invention perceptibly diminishes the temperature in the chamber wherein the feed pump is housed, and also permits easier mounting and dismantling of the functional elements of the appliance.

The invention will be further described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a side section elevation of a gas heating appliance according to the inven tion; Figure 2 is an enlarged detailed view of the upper front part of the appliance shown in Figure 1; Figure 3 is a cross-section of the appliance taken at the level of the burners; and Figure 4 is a front perspective view showing the exterior appearance of the appliance.

The gas heating appliance shown in the drawings comprises a rear chamber 1 wherein a feed pump (not shown) for the gas burners is housed, the chamber 1 being separated from the front part of the appliance by an intermediate plate 14, in which front part of the appliance are housed the burners 5, as well as a series of devices designed to cool the rear part of the burners 5 and the appliance in general.

The lower panel ]5 and the upper panel 16 of the appliance as well as the lateral panels thereof extend forwards from the rear chamber 1, constituting a front chamber which is closed by means of a front panel 2, the upper end of which incorporates a vertical flange 8 formed by bending the panel 2 through substantially a right angle, the flange 8 resting on supports 9 operatively arranged at the front edge of the upper panel 16 of the appliance. In this way, the upper end of the front panel is fixed to the appliance, the lower edge of the front panel having a portion 13 bent back through substantially a right angle, which portion 13 is screwed to the flat lower panel 15 constituting the base of the appliance.

The front panel 2 has formed therein a plurality of vertically extending orifices 3 aligned transversally. Immediately above the orifices 3 the front panel 2 has a deflector plate 10 inclined downwards and backwards away from the panel 2. The deflector plate 10 forms a ventilation channel, together with a deflector plate 11 arranged generally parallel thereto and below the plate 10, the air which flows along the channel defined by the plates 10 and 11 being discharged outwards through the orifices in the front panel 2.

The plate 11 is fixed to a housing 17 which acts as a support for the burners 5, which are mounted on a reflector plate 7, the burners 5 being fixed to the reflector plate 7 by means of screws and through supports. A protective grid 6 is provided on the panel 2 in front of the burners.

The reflector plate 7 forms with the plate 11 a second ventilation channel which extends to a grating 4 arranged below the orifices 3 in the front panel 2 and which is constituted by a plurality of horizontal plates, in the end wall of the grating interconnecting the plates thereof there being a series of orifices 18 for the outlet of air. The ventilation channel between the plates 7 and 11 is divided by a plate which is a continuation of the upper wall of the housing 17 and which cooperates with the grating 4.

The feed pump of the appliance, placed in the rear chamber 1, is joined by means of a flexible tube to a pipe 22 fixed to the upper part of the intermediate plate 14, next to which a valve 21 is located, from which a corresponding tube passes towards gas injectors 12 located below the burners.

Figure 3 shows a double sided joining plate 19 of the front of the appliance to the body thereof. This plate 19 is also shown in figure 2, but for reasons of clarity has been omitted from figure 1.

It can be seen from the above that, in contrast to existing gas heating appliances, and insofar as dismantling of the appliance is concerned, the present appliance essentially comprises only two parts, on the one hand the front Panel with its various attachments fastened thereto, and on the other hand the burners themselves. One such element can be separated from the other by means of the simple operation of removing fastening screws. Likewise, the front panel of the appliance together with all its attachments can be separated from the rest of the appliance by merely removing the screws situated at the lower edge thereof and disengaging the upper edge thereof from the rest of the appliance.

Thus, it can be seen that the operation of separating the front panel 2 together with its attachments comprises less operations than in a conventional appliance, since in all cases it is necessary to separate the valve 21 attached to the intermediate plate 14, only removal of the screws which join the burners 5 to the front panel 2 being necessary to dismantle the attachments. This operation has already been mentioned and is very simple.

In relation to cooling of the appliance, the shape and arrangement of the grating 4 which projects from the front panel 2 permits the passage of the very hot air and part of the flames which ascend from the burners 5 and are thus separated from the upper part of the panel 2, in other words this air which completely encircles the upper part of the front of the appliance is moved forwards by the grating, thus preventing direct heating of this part of the appliance.

On the other hand, the arrangement of the housing 17 behind the burners effectively forms a chimney in which originates a draught of air, which cold air passes through the lower part of the appliance since the part of the appliance below the burners 5 is not provided with a base, cools the rear part of the burners and is discharged towards the front part of the appliance through the grating 4. This cooling of the rear part of the burners influences the transmission of heat towards the rear chamber 1 wherein the feed pump of the appliance is housed.

The plate which is a continuation of the upper wall of the housing 17 co-operates with the grating 4 to thereby form two independent streams of cold air. One stream is formed between the plate 11 and the outer surface of the housing 17, and the other stream is formed between the inner surface of the housing 17 and the rear wall of the burners 5 and the reflector plate 7. In fact, heat is irradiated at the front of the burners 5 with the help of the reflector plate 7.

However, the heat is also transmitted to the rear surface of the burners, which is not desirable since the casing of the pump should be maintained completely cold.

Therefore a stream of cold air is established which passes along the rear surface of the burners, so that the cold air which is discharged through the lower part of the appliance absorbs heat, on contacting the burners, transmitting this heat towards the front of the appliance. In spite of this, the housing 17 is heated, although the temperature thereof, due to this stream of air, is much lower than the temperature of the support of the burners. To avoid heating, a second air duct is established between the housing 17 and the grating 4, but, since the upper part of the housing will be hotter, there is disposed in this upper part the plate 11 which divides the previously mentioned air duct into two ducts having independent outlets.

The intermediate plate 11 together with the upper plate 10 forms a second ventilation chimney which, also being fed with cold air entering at the lower part of the appliance, discharges it through the orifices 3 in the front panel 2. The opening in the plate 10 shown in Figures 1 and 2 constitutes a bypass window for pipes which connect the valve 21 with the gas injectors 12.

This second ventilation chimney likewise has an effect on the temperature of the chamber 1 housing the feed pump, as well as on the temperature existing in the front upper zone of the appliance wherein the valve 21 is housed. To diminish the temperature existing in this zone, there are provided a plurality of holes aligned on the front edge of the upper zone of the appliance, to renew the air in this zone with the consequent effect on the temperature of the valve 21.

The burners 5 are mounted generally in an arc with an obtuse angle between each pair of adjacent burners. With this arrangement a greater angle of emission of heat is achieved.

WHAT WE CLAIM IS: 1. A gas heating appliance comprising a rear chamber housing a feed pump for gas burners of the appliance, and a front chamber housing the burners and separated from the said rear chamber by a vertical intermediate plate, wherein the burners are directly attached to a reflector plate which is itself fixed to a front panel of the appliance the said front panel having immediately above the joining edge of the said reflector plate to the front panel a grating constituted by a plurality of flat horizontal plates emerging from the plane formed by the front panel, a wall of the grating interconnecting the plates thereof being provided with a plurality of orifices, the front panel further having immediately above the said grating a first deflector plate extending downwards and backwards without reaching the vertical intermediate plate which separates the front and rear chambers of the appliance, and a second deflector plate generally parallel to and spaced above the said first deflector plate and also parallel to the said reflector plate, the said second deflector plate being fixed to the inner surface of the front panel, the front panel having at the zone between the said first and second deflector plates a plurality of transversally aligned orifices.

2. A gas heating appliance as claimed in Claim 1, wherein the said front panel has at its upper edge a vertical flange formed by bending the panel through substantially a right angle, the said flange resting on support means operatively arranged at the front edge of the upper panel of the appliance, while the front panel has at its lower edge another flange formed by bending the panel back through substantially a right angle, the said another flange being screwed to the base of the appliance.

3. A gas heating appliance substantially as herein described with reference to, and as shown in, the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. towards the rear chamber 1 wherein the feed pump of the appliance is housed. The plate which is a continuation of the upper wall of the housing 17 co-operates with the grating 4 to thereby form two independent streams of cold air. One stream is formed between the plate 11 and the outer surface of the housing 17, and the other stream is formed between the inner surface of the housing 17 and the rear wall of the burners 5 and the reflector plate 7. In fact, heat is irradiated at the front of the burners 5 with the help of the reflector plate 7. However, the heat is also transmitted to the rear surface of the burners, which is not desirable since the casing of the pump should be maintained completely cold. Therefore a stream of cold air is established which passes along the rear surface of the burners, so that the cold air which is discharged through the lower part of the appliance absorbs heat, on contacting the burners, transmitting this heat towards the front of the appliance. In spite of this, the housing 17 is heated, although the temperature thereof, due to this stream of air, is much lower than the temperature of the support of the burners. To avoid heating, a second air duct is established between the housing 17 and the grating 4, but, since the upper part of the housing will be hotter, there is disposed in this upper part the plate 11 which divides the previously mentioned air duct into two ducts having independent outlets. The intermediate plate 11 together with the upper plate 10 forms a second ventilation chimney which, also being fed with cold air entering at the lower part of the appliance, discharges it through the orifices 3 in the front panel 2. The opening in the plate 10 shown in Figures 1 and 2 constitutes a bypass window for pipes which connect the valve 21 with the gas injectors 12. This second ventilation chimney likewise has an effect on the temperature of the chamber 1 housing the feed pump, as well as on the temperature existing in the front upper zone of the appliance wherein the valve 21 is housed. To diminish the temperature existing in this zone, there are provided a plurality of holes aligned on the front edge of the upper zone of the appliance, to renew the air in this zone with the consequent effect on the temperature of the valve 21. The burners 5 are mounted generally in an arc with an obtuse angle between each pair of adjacent burners. With this arrangement a greater angle of emission of heat is achieved. WHAT WE CLAIM IS:

1. A gas heating appliance comprising a rear chamber housing a feed pump for gas burners of the appliance, and a front chamber housing the burners and separated from the said rear chamber by a vertical intermediate plate, wherein the burners are directly attached to a reflector plate which is itself fixed to a front panel of the appliance the said front panel having immediately above the joining edge of the said reflector plate to the front panel a grating constituted by a plurality of flat horizontal plates emerging from the plane formed by the front panel, a wall of the grating interconnecting the plates thereof being provided with a plurality of orifices, the front panel further having immediately above the said grating a first deflector plate extending downwards and backwards without reaching the vertical intermediate plate which separates the front and rear chambers of the appliance, and a second deflector plate generally parallel to and spaced above the said first deflector plate and also parallel to the said reflector plate, the said second deflector plate being fixed to the inner surface of the front panel, the front panel having at the zone between the said first and second deflector plates a plurality of transversally aligned orifices.

2. A gas heating appliance as claimed in Claim 1, wherein the said front panel has at its upper edge a vertical flange formed by bending the panel through substantially a right angle, the said flange resting on support means operatively arranged at the front edge of the upper panel of the appliance, while the front panel has at its lower edge another flange formed by bending the panel back through substantially a right angle, the said another flange being screwed to the base of the appliance.

3. A gas heating appliance substantially as herein described with reference to, and as shown in, the accompanying drawings.