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High output heating deviceRelated Patent Categories: Stoves And Furnaces, Stove Doors And Windows, Feeding AirHigh output heating device description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20050279344, High output heating device. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The present invention relates to a new concept for high-output, multi-fuel, domestic, heating device comprising a sealed (or almost sealed) heating body whose operation can be remotely controlled. [0002] Sealed heating body should be understood as a heating body whose only communication with the outside consists of an inlet for primary cold air and an outlet for burnt gases. TECHNOLOGICAL BACKGROUND AND STATE OF THE ART [0003] In recent years, major efforts have been undertaken to create "modular" domestic heating devices that have the same shape, design or covering irrespective of the fuel used or of the nominal power required. These different devices are characterised by a combustion chamber (or a heating body) of specific dimensions for a solid, liquid or gaseous fuel or for a specified power level. Thus, the rear wall of the combustion chamber may comprise an intermediate part with an outlet opening adapted to each predefined situation (see patents U.S. Pat. No. 6,209,535 and EP-B-0 883 782). [0004] This type of design has in particular allowed the mass-production manufacturers to achieve productivity gains and rationalisation of intermediate parts stockholding. [0005] Another trend observed is that of bringing to the domestic stove and heater sector the benefits of technological innovations that allow to increase the comfort of use and the user-friendliness of these devices. Hence, the Applicant also proposed a heating device with a double casing for the circulation of air, having on its front face a plate blocking the free space between the two casings and provided with sized apertures for air inlet and outlet so as to simultaneously optimise both the temperature and the speed of the outgoing flow of air (patent application EP-A-1 111 307). [0006] At the present time, heating devices such as stoves comprise the hybrid assembly of a combustion chamber, possibly rationalised as mentioned above, that can for instance be made of sheet steel, with structural parts and/or a decorative covering comprising for example elements made of cast iron, ceramic or even firestone such as oleaginous stone (steatite, "soapstone"). The fixing of the parts is achieved by complex and inefficient techniques making use of tie-rods, throats and putty. This complexity is justified by the need to guarantee the best possible seal of the combustion chamber in order to obtain the minimum desired output. Indeed, the combustion chamber can be considered as a closed prismatic shape only open on its front face comprising a door, possibly letting flames be seen through a window, and/or on its upper face to allow the placing of a cooking plate. [0007] Apart from the loss of productivity, this method of assembly has drawbacks associated with the use of putty. In fact, when the putty dries, it may shrink or present micro-cracks, which lets air enter the chamber, thus adversely affecting the output of the device. The presence of putty makes it difficult to obtain the required seal in accordance with the various standards in force in different countries (e.g.: EPA standards in the US). [0008] Moreover, during transportation of the device after manufacture, flows of putty may appear on visible surfaces, which requires the intervention of expensive after-sales service. [0009] Lastly, there are numerous licensing standards for the introduction of the above-mentioned heating devices to the market, the technical requirements generally varying from one country to another (American, French, DIN+, European, Norwegian etc. standards). It is thus often necessary to make successive modifications to a given device with a view to meet licensing regulations in several countries (regulation of the combustion-air opening, device for guiding the hot air to the flame, etc.). [0010] Document DE-A-30 09 251 describes a heating device for solid fuel whose combustion chamber is defined by stainless steel sheets in the form of concave flanges, which are fixed to the outer walls so as to form channels allowing to lead the secondary air into said chamber, through inlet air openings made in its upper part. The flanges are arranged at the back and on both sides of the chamber. The joint at the front is formed by a grate. Slits for air inlet made at the bottom of the flanges allow part of the primary air to be diverted as secondary air. The outer walls making up the main carrier structure of the stove, and the flanges are provided with rims that allow to apply the sheets one over the other in a peripheral area in order to form a lining where these are to be fixed by welding or screwing. The assembly of the various walls thus proves difficult and the seal of the combustion chamber is not guaranteed. The secondary air supply may be manually or automatically controlled. [0011] Document WO-A-99 64789 describes a heating device for solid fuel comprising a control means, associated with sensors and automatically controlled for instance by a motor, at the level of three types of air inlet: primary, secondary and tertiary. The device is provided with a programmable control unit for selective control of the regulation means so as to optimise the combustion in different operating conditions, in particular during the ignition phase, "high" and "low" running, re-ignition and extinction phases. The primary air is guided to the furnace at the bottom of the combustion chamber. The secondary air is guided by a channel adjacent to the chamber where it is heated over the furnace, along the window, so as to reduce soot deposition. Lastly, the tertiary air is guided to the centre of the chamber by another channel so as to ensure the complete combustion of the unburnt gases. The apertures of these air inlets are preferably regulated by a valve or a damper controlled by an actuator such as a step motor, controlled by the programmable unit. [0012] The control unit may be connected to a clock or to a thermostat. The control parameter on which regulation is based is the combustion temperature. The different operating conditions are displayed on a control display unit also showing indicator lights and push-buttons that allow the user to select the operating conditions. [0013] The reaction times to the air-inlet controls in terms of reached combustion temperature are of the order of several minutes at least. AIMS OF THE INVENTION [0014] The present invention aims to provide a solution which dispenses with the drawbacks of the state of the art. [0015] In particular, the invention aims to provide a heating device designed to allow the achievement of major productivity gains during the mass-assembly process. [0016] In addition, the invention aims to provide a heating device whose combustion chamber is almost perfectly sealed. [0017] The invention moreover aims to propose a domestic heating device that ensures to the user the comfort of remotely controlling its operation conditions with precision and automatically. [0018] Finally, the invention aims to propose a domestic heating device that has a high degree of flexibility so as to pass licensing tests in various countries. MAIN CHARACTERISTIC ELEMENTS OF THE INVENTION [0019] A first aspect of the present invention relates to a multi-fuel heating device comprising: [0020] a combustion chamber made of weldable sheet metal, preferably steel, obtained by the assembly of a rear wall, two lateral walls, a lower wall and an upper wall, said chamber having predetermined standard dimensions depending on the nominal power required, Continue reading about High output heating device... Full patent description for High output heating device Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this High output heating device patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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