Patent Publication Number: US-6659765-B1

Title: Infrared rays gas burner

Description:
FIELD OF THE INVENTION 
     The present invention relates to a gas stove, and more particularly to a composite an infrared rays gas burner. 
     BACKGROUND OF THE INVENTION 
     A conventional infrared rayed gas burner was provided in a stove which burns gas to heat a ceramic plank so as to provide infrared rays for cooking foods. There were two types of infrared rayed gas burners presented in the market, one of which provided ceramic planks on a conventional gas burner to heat them directly, the other one of which provided an open type gas burner and fixed with ceramic planks thereon with galvanized iron nails. The gas burner of the second type is smaller and gas and air will be mixed well so that the second type of the conventional infrared rayed gas burner is popular in the present market. 
     It will be noted that the ceramic planks of the second type of the infrared rayed gas burner is fixed the with the gas burner by galvanized iron nails, therefore the ceramic planks are easy to be damaged when assembling, and, if the ceramic plank were damaged, all of them must be replaced and the replacement procedures are not an easy work. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide an infrared rays gas burner, which will not damage the ceramic planks. 
     The secondary object of the present invention is to provide an infrared rays gas burner, which has an easy way to assemble it. 
     The third object of the present invention is to provide an infrared rays gas burner, which can only replace parts of the ceramic planks which are damaged. 
     According to the objects of the present invention, an infrared rays gas burner comprises a main member having a box which has a base seat and a cover, at least a non-asbestos pad and at least a ceramic plank, wherein the base seat has an opening at a top side thereof, support portions at the top side thereof and a connecting opening and lock holes on an end thereof and the cover has an opening at a midsection thereof and stop portions at an edge of the opening. The non-asbestos pad rests on the support portions of the base seat and the ceramic plank rests on the non-asbestos pad and the cover is secured to the base seat with the stop portion against the ceramic plank. A gas mixing tube has an inner tube secured on an interior side of the base seat and an outer tube secured on an exterior side of the base seat, wherein the inner tube is communicated with the out tube via the connecting opening of the base seat, the inner tube having a tunnel therein which has a smaller size at the end thereof communicating the out tube and a larger size at the other end thereof and the outer tube having a tunnel therein which has a smaller size at the end thereof communicating the inner tube and a larger size at the other end thereof. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of a first preferred embodiment of the present invention; 
     FIG. 2 is an exploded view of the first preferred embodiment of the present invention; 
     FIG. 3 is a sectional view in part of the first preferred embodiment of the present invention, showing the relationship of a cover, a support portion, a non-asbestos pad and a ceramic plank; 
     FIG. 4 is a sectional view of the first preferred embodiment of the present invention, showing the relationship of an inner tube, an outer tube and a guiding device; 
     FIG. 5 is a perspective view of a second preferred embodiment of the present invention, and 
     FIG. 6 is a sectional view of the second preferred embodiment of the present invention. 
    
    
     DETAIL DESCRIPTION OF THE INVENTION 
     Please refer to FIGS. from FIG. 1 to FIG. 4, the first preferred embodiment of the present invention provides an infrared rays gas burner  10 , which mainly comprises a main member  12 , a gas mixing tube  14 , a frame  16 , a nozzle  18  and a connector  19 , wherein 
     The main member  12  has a box  22 , two non-asbestos pads  24  and a plurality of ceramic planks  26 . The box  22  has a base seat  30 , which has a housing portion  32  and an annular flange portion  34  with holes  35  at an opening side of the housing portion  32 . An annular flat portion at the boundary of the housing portion  32  and the flange portion  34  is defined as a support portion  36 . A connecting opening  38  and two lock holes  40  at opposite sides of the connecting opening  38  are provided at a front side of the housing portion  32 . A cover  42  has a cap portion  44 , an opening  45  at a top side of the cap portion  44 , a stop portion  46  around the opening  45  and an annular flange portion  48  at a bottom side of the cap portion  44  with holes  49  thereon corresponding to the holes  35  on the flange portion  34  of the base seat  30 . The cap portion  44  respectively provides plugs  50  at interior sides of lateral sides thereof. The non-asbestos pads  24  are put on the support portion  36  and the ceramic planks  26  are rested on the non-asbestos pads  24  and against by the stop portion  46 . The main member  12  further has two holding pieces  52 , each of which is an L-shaped cross-section bar having a horizontal piece  54  and a vertical piece  56 . The holding pieces  52  is put on the base seat  30  with the horizontal pieces  54  respectively resting between the non-asbestos pads  24  and the ceramic planks  26  and the vertical pieces  56  attached on the interior sidewall of the base seat  30 . The vertical pieces  56  of the holding pieces  52  are provided with gaps  58  to engage the plugs  50 . Each vertical piece  56  further has an inward portion  60  to guild the plugs  50  to slide into the gaps  58 . 
     The gas mixing tube  14  consists of an inner tube  62  and an outer tube  64 . The inner tube  62  has a taper-shaped tube member  66  and a taper-shaped tunnel  67  therein. A first lock portion  68  is provided on an exterior side of the tube member  66  at the end of the tunnel  67  having smaller size with apertures on opposite sides. A first connection portion  70  is provided at a distal end of the first lock portion  68  having a size smaller than the opening  30  on the housing portion  32  of the base seat  30 . 
     The outer tube  64  has a taped-shaped case member  72  and a taped-shaped tunnel  74  therein. A second connection portion  76  is provided on an interior side of the case member  72  at the end of the tunnel  74  having a smaller size. A second lock portion  78  is provided on a distal end of the second connection portion  76  with apertures on opposite sides. The inner tube  62  passes the first connection portion  70  through the connecting opening  38  and attaches the first lock portion  68  on the interior sidewall of the housing portion  32 . The outer tube  64  engages the second connection portion  76  with the first connection portion  70  and connects the first and the second lock portions  68  and  78  and the lock holes  40  by screws to secure outer tube  64  and the inner tube  62  on the base seat  30 . Because of the smaller end of the tunnel  74  of the outer tube  64  connects the smaller end of the tunnel  67  of the inner tube  62 , the gas mixing tube  14  will work like a Venturi tube to increase the flow speed of the gas passing through. 
     The frame  16  is secured at a distal end of the outer tube  64  and the nozzle  18  and the connector  19  are provided on the frame  16 . 
     The present invention further comprises a guiding device  80  which mainly consists of a side board  81  and a main board  85  to be an L-shaped from a lateral view. The side board  81  has an engaging opening  82 , two apertures  86  at opposite sides of the engaging opening  82  respectively and two openings  84  at distal sides of the apertures  86  respectively. The main board  85  has a plurality of guiding portions  83  thereon and each guiding portion  83  has an outlet  87  facing the outer tube  64 . 
     The way of the infrared rays gas burner  10  working is like the conventional one, and I am not going to describe the detail again. The characters of the present invention are hereunder: 
     In assembling, the holding pieces  52  clip the ceramic planks  26  first and squeeze them into the cover  48 , such that the plugs  50  on the cap portion  44  will engage the gaps  58  of the holding pieces  52  to secure the holding pieces  52  and the ceramic planks  26  therein. Next, secure the cover on the top side of the base seat  30  by screws to finish the assembling procedures. It will be easy to understand that the assembling procedures of the infrared rays gas burner  10  of the present invention are very simple and it will not damage the ceramic planks  26  in assembling. 
     The ceramic planks  26  are detachable mounted in the cover  42  so that it can only replace the damaged ceramic plank(s)  26  rather than replace all of the ceramic planks  26  when any one of them was damaged. Next, the inner tube  62  and the outer tube  64  are fixedly secured on a sidewall of the base seat  30 . 
     The gas flowed through the outer tube  64  the inner tube  62  will increase the flow speed, and the gas inject out of the inner tube  62  will spread in base seat  30  below the main board  85  and flow through the outlets  87  to the space below the ceramic planks  26 . The orientations of the outlets  87  will help the gas filled in the space equally to make the ceramic planks  26  will be heated equally. The openings on the side board  81  of the guiding device  80  can let the gas flowing back. 
     Please refer to FIG.  5  and FIG. 6, an infrared rays gas burner  90  of the second preferred embodiment of the present invention, which is similar to the infrared rays gas burner  10  of the first preferred embodiment, except that a cover  91  has plank member  92  with an opening  93 . The plank member  92  is bent upwardly at interior sides to be two stop portions  94 . The infrared rays gas burner  90  of the second preferred embodiment provides no holding piece  52  as the first preferred embodiment does so that ceramic planks  95  are attached on the non-asbestos pads  96  directly. At last, secure the cover  91  on a base seat  97  will finish the assembling procedures. The stop portions  94  of the cover  91  will be against the ceramic planks  95  to prevent them from escaping. The infrared rays gas burner  90  of the second preferred embodiment also a guiding device  100  which guiding portions  102  are made from punching. It will make the guiding device  100  can be manufactured easier.