Diffuser support base for burners and construction method

Abstract: The base is unique in that it is composed of non-porous vitrified refractory material. The construction method involves mixing a number of atomised powder-based components to which water and a mould release agent are then added, the mixed product being selected by means of a sieve test before being cast and pressed; the base obtained thereby is dried with hot air, polished, fired for the first time, glazed and fired again.

Description: OBJECT OF THE INVENTION As its name indicates, the invention relates to a base like those used on cooker and cooking top burners to support the diffusers and which are connected to the gas pipe which supplies gas to the burner, as well as the process for constructing the said base. BACKGROUND At present, the diffuser bases used on cooker and cooking top burners are made of cast iron and are therefore porous. When hot food spills onto the hot base, it becomes stratified on the base and part of the food becomes incrusted on the inside of the pores, preventing the base from coming completely clean using conventional cleaning methods. GB Patent 1 579 322 refers to gas burner of the kind set forth for domestic appliances in which the intake tube is housed within the body. A flow path is defined in the body by way of which the gas/air mixtured leaving the inner end of the tube is directed back towards the outer end of the tube and then towards the inner end again before issuing from jets or flame ports of the burner. The invention relates to gas burners for domestic appliances of the kind in which a gas/air mixture is supplied to jets or flame ports in a burner body through one or more intake tubes and, in use, gas is injected into the intake tube from an injector simultaneously with air being entrained into the gas stream. In this invention burners may be constructed from a ceramic material that applicant do not specify. US Patent 3 773 027 relates a countertop heating apparatus. This invention refers to a domestic cooking unit with a drip pan, a planar countertop containing at least one opening, and a heating plate located in the opening and to be heated by a gas burner positioned below the heating plate. The drip pan, countertop and heating plate are formed from an infrared transmitting, heat-resistant, nonporous, glass-ceramic material. The periphery of the heating plate is spaced inwardly from the periphery of the opening to permit flow of combustion products. A plurality of spaced support means extend between the drip pan and the heating plate. FR Patent 1 581 180 relates a process to manufacture an enameled head-resistant cement. The cement is baked first at 650°C-800°C and later at 1250°C-2000°C. The cement contains SiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO, MgO, TiO 2 , Na 2 O and K 2 O. DE Patent 40 04 102 refers to a ceramic mass, that contains SO 2 , AL 2 O 3 , Fe 2 O 3 , TiO 2 , MgO, CaO, K 2 O and Na 2 O. This ceramic mass is used to manufacture dishes. The present invention consist in a diffuser support base for burners that is characterised in that it is made of a non-porous vitrified refractory material. The invention refers to a process for obtaining the diffuser support base mentioned characterised in that it is composed of 8 steps : a) the following components, in the form of atomised powder, are mixed together: silicon dioxide (SiO 2 ), aluminium trioxide (Al 2 O 3 ), titanium dioxide (TiO 2 ), ferrous oxide (Fe 2 O 3 ), magnesium oxide (MgO), potassium oxide (K 2 O), calcium oxide (CaO) , sodium oxide (Na 2 O), phosphorous (P), and fluoride (F); b) water and olein-based mould release agents are added to the mix, c) the product obtained is selected by sieve testing, d) the chosen product is placed in a mould and pressure applied thereto to shape the base, e) the base obtained thereby is introduced into a hot air chamber and then polished, f) the base is fired at a temperature of about 1000°C, g) the base is glazed, and h) the base is fired again at a temperature of 1350°C. DESCRIPTION OF THE INVENTION To solve these problems, the diffuser support base referred to herein has been uniquely designed in that it is made of non-porous vitrified refractory material in order to reduce food which spills on the hot base from sticking, thereby facilitating subsequent cleaning considerably and enabling the complete elimination of all spilled food since it is burned on the surface of the base rather than inside the pores, as occurs with conventional burners. According to the invention, the process used to obtain the base is composed of the following steps: a) the following components, in the form of atomised powder, are mixed together: silicon dioxide (SiO 2 ), aluminium trioxide (Al 2 O 3 ), titanium dioxide (TiO 2 ), ferrous oxide (Fe 2 O 3 ) , magnesium oxide (MgO), potassium oxide (K 2 O), calcium oxide (CaO), sodium oxide (Na 2 O), phosphorous (P), and fluoride (F); b) water and olein-based mould release agents are added to the mix, c) the product obtained is selected by sieve testing, d) the selected product is placed in a mould and pressure applied thereto to shape the base, e) the base obtained thereby is introduced into a hot air chamber and then polished, g) the base is fired at a temperature of about 1000°C, g) the base is glazed and h) the base is fired again at a temperature of 1350°C. DESCRIPTION OF THE DRAWINGS In order to facilitate an understanding of the invention, a sheet of drawings is attached to this description in which: Figure 1 shows a vertical section of a portion of a cooking top, where the base in question can be seen connected to the gas pipe and supporting a diffuser. PREFERRED EMBODIMENT OF THE INVENTION As observed in the referenced figures, the base (1) which is part of the cooking top burner (2) is connected to the gas pipe (3) which supplies the gas to the burner and also serves as a diffuser support (4), is unique in that it is made of non-porous vitrified material in order to reduce food from sticking to the hot base during preparation due to the heat produced by the combustion of the gas from the holes in the base (1) and the diffuser (4). No further description is deemed necessary since any expert in the field will understand the scope of the invention and the advantages derived therefrom. The terms in which this description has been written shall always be understood in the widest, non-limiting sense, the essential features of the invention being contained in the following claims:

Claims: Diffuser support base (1) for burners (2) ) which, being of the type used on cookers and cooking top to support the diffusers (4), is connected to the end of the gas pipe (3) that supplies gas to the burner (2), wherein said diffuser support base (1) is made of non-porous vitrified refractory material. Process for obtaining the diffuser support base (1) mentioned in the preceding claim, characterised in that it is composed of the following steps: a) the following components, in the form of atomised powder, are mixed together: silicon dioxide (SiO 2 ), aluminium trioxide (Al 2 O 3 ), titanium dioxide (TiO 2 ), ferrous oxide (Fe 2 O 3 ), magnesium oxide (MgO), potassium oxide (K 2 O), calcium oxide (CaO), sodium oxide (Na 2 O), phosphorous (P), and fluoride (F); b) water and olein-based mould release agents are added to the mix, c) the product obtained is selected by sieve testing, d) the chosen product is placed in a mould and pressure applied thereto to shape the base (1), e) the base (1) obtained thereby is introduced into a hot air chamber and then polished, f) the base (1) is fired at a temperature of about 1000°C, g) the base (1) is glazed, and h) the base (1) is fired again at a temperature of 1350°C.

Inventors: MENDOZA SORIA CARMELO, MENDOZA SORIA, CARMELO
Applicants: MENDOZA SORIA CARMELO, MENDOZA SORIA, CARMELO
Application year: 1999
Main classification: F23D14
IPC codes: F24C3, F23D14