Abstract:
A smoke and electric heating oven comprises an oven body installed with a receiving chamber; a receiving frame being installed therein, a supporting frame being installed below the receiving frame; the supporting frame being installed with a heating tube; an outer side of the oven body being enclosed by heating stripes; a top of the oven body being protruded with a chimney which penetrates to the receiving chamber; a front side of the oven body being installed with a door; a front edge of the oven body having a control panel; a heating box installed on the supporting frame in the oven body; the heating tube being inserted into the heating box; and a casing enclosing an outer side of the oven body and heating stripes; a top of the casing having a pass hole; the chimney passing through the pass hole.

Description:
[0001]    The present invention is a continuation in part (CIP) of U.S. patent application with Ser. No. 11/604,381 which is invented and assigned to the inventor and applicant of the present invention, and thus the contents of U.S. patent application Ser. No. 11/604,381 is incorporated into the present invention as a part of the present invention. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to ovens, and particularly to a smoke and electric heating oven, which has the function of electric heating and smoke heating by woods. Another object of the present invention is to provide a smoke and electric heating oven, wherein the baked object is baked uniformly. 
       BACKGROUND OF THE INVENTION 
       [0003]    A prior art oven Al is illustrated in  FIG. 1 . A bottom or interior of the oven is installed with electric heating device A 11  (maybe a fan is also added). The baked object is placed in a baking disk A 10 . A door A 12  is closed. Electric generated heat is transferred into the oven for baking foods. However in the prior art oven A 1 , heat is radiated to the baked object directly so that the baking effect is not preferred. For example the heating is not uniform due to the distances of the different parts of the baked object to the heat source. As a result, it is possible that one side of the baked object is cooked and another side has not been cooked or the exterior of the baked object is cooked, while another part has not been cooked. Thus, in baking process, the door of the oven is often to be opened for turning the baked object. 
         [0004]    Moreover, in the prior art oven, when the door of oven is often opened and closed. The door in the prior art design is not preferred and thus as for a long time, gaps are generated between the door and the front side of the oven. Thus the heat in the oven will drain out. 
         [0005]    Furthermore, in the prior art oven, it has only the function of baking, but no function of smoking is provided. Thus if it is desired to heat an object by smoke, the object must be placed to a heating furnace. Thus is inconvenient for users. 
       SUMMARY OF THE INVENTION 
       [0006]    Accordingly, the primary object of the present invention is to provide a smoke and electric heating oven, which has the function of electric heating and smoke heating by woods. 
         [0007]    Another object of the present invention is to provide a smoke and electric heating oven, wherein the baked object is baked uniformly. 
         [0008]    Another object of the present invention is to provide a smoke and electric heating oven, wherein a door of the oven body can be tightly sealed to prevent the drainage of smoke and vapor. 
         [0009]    A further object of the present invention is to provide a smoke and electric heating oven, wherein a receiving frame can be detached easily for cleaning. 
         [0010]    A yet object of the present invention is to provide a smoke and electric heating oven, wherein a water box is provided for receiving condensing water. The water box can be detached easily and conveniently for washing. 
         [0011]    A still object of the present invention is to provide a smoke and electric heating oven, wherein the draining of smoke is controllable by adjusting an opening of a chimney. 
         [0012]    To achieve above objects, the present invention provides a smoke and electric heating oven which comprises an oven body installed with a receiving chamber; a receiving frame being installed therein, a supporting frame being installed below the receiving frame; the supporting frame being installed with a heating tube; an outer side of the oven body being enclosed by heating stripes; a top of the oven body being protruded with a chimney which penetrates to the receiving chamber; a front side of the oven body being installed with a door; a front edge of the oven body having a control panel; a heating box installed on the supporting frame in the oven body; the heating tube being inserted into the heating box; and a casing enclosing an outer side of the oven body and heating stripes; a top of the casing having a pass hole; the chimney passing through the pass hole. 
         [0013]    The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]      FIG. 1  shows a prior art oven. 
           [0015]      FIG. 2  is an exploded perspective view of the present invention. 
           [0016]      FIG. 3  is a perspective view showing the oven body of the present invention which is viewed from another orientation. 
           [0017]      FIG. 4  is a partial exploded perspective view of the present invention. 
           [0018]      FIG. 5  is a schematic view showing that the water box is drawn out. 
           [0019]      FIG. 6  is an assembled schematic view about the drain proof stripe of the present invention. 
           [0020]      FIG. 7  is an enlarged view of part A in  FIG. 6 . 
           [0021]      FIG. 8  is a structural schematic view showing the structure about the door buckle of the present invention. 
           [0022]      FIG. 9  is a partial enlarged view of part B in  FIG. 8 . 
           [0023]      FIG. 10  shows the operation of the opening door and operation of the door buckle of the present invention. 
           [0024]      FIG. 11  is an exploded perspective view of the heating box of the present invention. 
           [0025]      FIG. 12  is a structural: cross sectional view about the heating tube of the present invention. 
           [0026]      FIG. 13  is an assembled view of the heating box of the present invention. 
           [0027]      FIG. 14  shows the use of the present invention. 
           [0028]      FIG. 15  shows another use of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0029]    In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. 
         [0030]    Referring to  FIGS. 2 ,  11  and  12 , the present invention includes an oven body  1 , a heating box  2 , and a casing  3 . 
         [0031]    The oven body  1  has a receiving chamber  10 , a heating tube  11 , a heating stripe  12 , a positioning unit  13 , a chimney  14 , a chimney cover  15 , a door  16 , a control panel  17 , and a water box  18 . 
         [0032]    The receiving chamber  10  serves for receiving objects to be baked. The door  16  is closeable for closing the receiving chamber  10  to be as a sealing chamber. The baking is performed by electric heating. The two lateral inner walls of the receiving chamber  10  are installed with symmetric receiving frames  100  and plurality of buckles  1001  which may be screws. The receiving frame  100  is made of metals or steel stripes which are elastic. The receiving frame  100  is installed with buckling grooves  1002  for positioning the buckles  1001  so that the receiving frame  100  can be attached or detached easily. The baking frame or net can be supported in the receiving frame  100 . Near a lower side of a rear wall of the receiving chamber  10  has two supporting frames  101  and one supporting plate  102 . The two supporting frames  101  are fixed to and extended forwards from the supporting plate  102 . The supporting plate  102  is fixed to the rear wall of the receiving chamber  10 . An inner wall of a front end of the receiving chamber  10  of the oven body  1  has an embedding recess  103  and a drain proof stripe  104  which are fixed to the embedding recess  103  (referring to  FIG. 6 ). Preferably, the drain proof stripe  104  is formed of silicon gel which is temperature tolerant and low chemical reactivity (referring to  FIGS. 6 and 7 ). One side of the drain proof stripe  104  has an embedding stripe  1040  for embedding into the embedding recess  103 . Thus, the drain proof stripe  104  is fixed to a front end of the receiving chamber  10 . The drain proof stripe  104  may be a hollow stripe. When the door is closed, the drain proof stripe  104  will compress and deform so as to seal the oven body  1  effectively. A front bottom end of the oven body  1  has a trench  105  (see  FIG. 5 ). 
         [0033]    The heating tube  11  passes through the supporting plate  102  and are located between the two supporting frames  101  (referring to  FIGS. 4 and 11 ). The heating tube  11  is a single straight tube (referring to  FIG. 12 ). An interior of the heating tube  11  is installed with heating wire  110  and an exterior thereof is installed with a metal housing  111 . A rear end of the heating tube  11  is installed with a fixing frame  112  for retaining the supporting plate  102  at the rear wall of the receiving chamber  10  of the oven body  1 . Besides, a rear end of the fixing frame  112  is installed with a power wire  113  for inputting or outputting electric power. Thus the space of the receiving chamber  10  is saved so that thermal power can be used effectively. A plurality of heating stripes  12  are arranged around the oven body  1 . The heating stripes  12  are clamps and thus fixed by insulation units  120 . A plurality of positioning units  13  (such as rivets) are used to combine the insulation units  120 . The insulation units  120  are made of such as Mica or other insulation materials. The heating stripes  12  are arranged around the sides of the oven body  1  (at least enclosing the left, right and bottom of the oven body  1 ). An insulating paper  121  is placed between the heating stripes  12  and the oven body  1 . The insulating paper  121  may be such as an Mica paper), referring to  FIG. 3 , so as to enhance the insulation of the oven body  1 . A layer of temperature tolerant cotton P encloses the heating stripes  12  for preventing heat of the heating stripes  12  from dissipation (referring to  FIGS. 2 and 4 ). 
         [0034]    A chimney  14  protrudes from a top of the oven body  1  which penetrates the oven body  1  to the receiving chamber  10 . A top of the chimney  14  has a semi-round through hole  140 . A chimney cover  15  covers upon the chimney  14 . The chimney cover  15  is installed with a semi-round via hole  150  which is corresponding to the through hole  140  of the top of the chimney  14  (referring to  FIGS. 2 to 4 ). 
         [0035]    A door  16  is pivotally installed at a front surface of the oven body (referring to  FIGS. 8 to 10 ). An elastic door buckle  160  made of steel sheet is fixed upon the door  16 . The door buckle  160  has a protruded stop  161 . The door  16  is installed with a handle  162 . 
         [0036]    A control panel  17  is installed upon an upper front side of the oven body  1  corresponding to the door  16  (referring to  FIG. 2 ). A control panel  17  has installed with a switch  170 , a button  171 , and an indication light  172 . A bottom of the control panel  17  corresponding to the door buckle  160  is installed with a buckling recess  173  (referring to  FIG. 9 ) for buckling the stop  161  of the door buckle  160  so as to tightly close the door  16 . When the door buckle  160  is pressed downwards, the door can be released for operation. 
         [0037]    A drawer type water box  18  (referring to  FIG. 5 ) is installed at a lower side of the door  16 . The water box  18  can be inserted into the trench  105  at the lower side of the oven body  1 . The water box  18  serves for condensing the water draining out from the door  16 . The water box  18  can be drawn out for cleaning. 
         [0038]    A heating box  2  (referring to  FIGS. 4 , and  11  to  13 ) is installed on the supporting frames  101  in the receiving chamber  10  of the oven body  1 . The heating box  2  has the following elements. 
         [0039]    A box body  20  has a tapered bottom. A rear side of the box body  20  has a through hole  200  for receiving the heating tube  11 . The box body  20  is installed with a plurality of vent holes  201 . A front side of the box body  20  is protruded with a handle  202 . A net  21  is installed in the box body  20 . A size of the net  21  is smaller than an upper portion of the box body  20  and smaller than a lower side of the box body  20  so that the net  21  can be positioned at a middle section of the box body  20 . A net  21  can support smoking woods. A box cover  22  is pivoted to the box body  20  through a hinge  23 . One side of the hinge  23  is firmly secured to the side of the box body  20  having the through hole  200 . Another side of the hinge  23  is combined with the box cover  22  so that when the cover  22  covers upon the box body  20 , the cover  22  is pivoted with respect to the box. 
         [0040]    The casing  3  has an approximate U shape for covering upon the oven body  1  (referring to  FIGS. 2 and 4 ) for enclosing the oven body  1 . A top of the casing  3  has a pass hole  30 . The chimney  14  protrudes out from the pass hole  30 . 
         [0041]    In assembly, referring to  FIGS. 2 ,  4  to  8 ,  11  and  13 , firstly, the buckling groove  1002  of the receiving frame  100  is buckled to the buckle  1001  of the receiving chamber  10 . Then the receiving frame  100  is pushed backwards to adhere to one lateral wall of the receiving chamber  10  so at the buckling groove  1002  is aligned to the buckle  1001  of the receiving chamber  10 . Then the receiving frame  100  is released. The resilient elasticity of the receiving frame  100  will cause the buckling groove  1002  is fixed to the buckle  1001 . Thus the object to be baked or baking net can be installed on the receiving frame  100 . Then one side of the hinge  23  is firmly secured to the side of the box body  20  having the through hole  200 . Another side of the hinge  23  is combined with the box cover  22  so that when the cover  22  covers upon the box body  20 , the cover  22  is pivoted with respect to the box. Then the water box  18  is inserted into a bottom of the oven body  1 . 
         [0042]    In operation, referring to  FIGS. 4 ,  8  to  10 ,  13  to  15 , at first, the cover  22  is rotated from the box body  20 , and the net  21  is placed into the box body  20 . Then woods A are placed upon the net  21 . Then the cover  22  covers upon the box body  20 . Then the hand of user holds the handle  202  so as to place the heating box  2  to the receiving frame  100 . Then the heating tube  11  passes through the through hole  200  of the box body  20  and protrudes to the lower side of the net  21 . Then a baking disk (or a baking net or a baking frame) with object to be baked is placed upon the receiving frame  100 . The door  16  is closed. The stop  161  is buckled into the buckle groove  173  of the control panel  17 . Then the temperature and time for baking are set from the control panel  17 . 
         [0043]    The present invention has two independent heating systems. One is the heating stripes  12  which heat the oven body  1  and thus heat the baking object in the receiving chamber  10 . The other is the heating tube  11  in the receiving chamber  10  of the oven body  1 . The heating tube  11  heats the woods in the box body  20 . The heat is transferred from the vent holes  201  to the whole receiving chamber  10  so as to heat the baked object. The smoke is drained out from the chimney  14  (referring to  FIG. 15 ). When it is desired to vent smoke out of the receiving chamber  10 , the via hole  150  of the chimney cover  15  is rotated to align the through hole  140  of the chimney  14 . If not used, the via hole  150  is rotated to the top of the chimney  14  to prevent undesired object to fall into the chimney  14 . Thereby the object B to be baked presents the color and odors due to the effect of smoke. 
         [0044]    After baking, the door  16  is opened for taking out the object B. Firstly, the door buckle  160  is pressed downwards (referring to  FIG. 10 ) so that the stop  161  on the door buckle  160  separates from the buckling groove  173  of the control panel  17 . Then the hand holds the handle  162  of the door  16  for opening the door  16  fully and thus taking out the object B. 
         [0045]    Furthermore, in baking, the vapor from the object B is condensed to the water box  18  as the door  16  is opened and water flows out. 
         [0046]    Advantages of the present invention will be described herein. 
         [0047]    1. Two heat sources, heating stripes  12  and heating tube  11 , are used to have dual effect in baking. 
         [0048]    2. The temperature tolerant cotton P encloses the heating stripes  12  so that heat can be transferred to the receiving chamber  10  effectively. The heat can be transferred to the receiving chamber  10  uniformly. However the conventional electric heating tubes can not heat an object uniformly. In the heating tubes, those near the tube is heated effectively, while those far away from the tubes are heated ineffectively so that the object to be baked can not be heated uniformly. 
         [0049]    3. The heating tube  11  is installed in the heating box  2 . The heating box  2  is located at a lower side of the receiving chamber  10  of the oven body  1  so that the space is saved and it can provide an effective heating effect. 
         [0050]    4. The present invention can be assembled conveniently. The buckling groove  1002  of the receiving frame  100  is buckled to the buckle  1001  of the receiving chamber  10 . Then the receiving frame  100  is pushed backwards to adhere to one lateral wall of the receiving chamber  10  so at the buckling groove  1002  is aligned to the buckle  1001  of the receiving chamber  10 . Then the receiving frame  100  is released. The resilient elasticity of the receiving frame  100  will cause the buckling groove  1002  is fixed to the buckle  1001 . The receiving frame  100  can be taken out easily for cleaning. 
         [0051]    5. In the present invention, the drain proof stripe  104  made of silica gel is installed in front of the receiving chamber  10  of the oven body  1  and will make the door tightly seal upon the receiving chamber  10 . Thus in heating, the smoke will not drain out so as to increase the heating efficiency. 
         [0052]    6. In the present invention, a plurality of heating stripes  12  are arranged around the oven body  1 . The heating stripes  12  are clamps and thus fixed by insulation units  120 . Thus positioning units  13  (such as rivets) are used to combine the insulation units  120 . The insulation units  120  are made of such as Mica or other insulation materials. The heating stripes  12  are arranged around the sides of the oven body  1  (at least enclosing the left, right and bottom of the oven body  1 ). An insulating paper  121  is placed between the heating stripes  12  and the oven body  1 . The insulating paper  121  may be such as Mica paper), referring to  FIG. 3  so as to enhance the insulation of the oven body  1 . A layer of temperature tolerant cotton P encloses the heating stripes  12  for preventing heat of the heating stripes  12  from dissipation (referring to  FIGS. 2 and 4 ). The Mica is a good insulating material which is a large resistance, lower dielectric lose, and is anti-electric arc, etc. 
         [0053]    7. In the present invention, the chimney  14  protrudes from the top of the oven body  1  which penetrates the oven body  1  to the receiving chamber  10 . The top of the chimney  14  has the semi-round through hole  140 . The chimney cover  15  covers upon the chimney  14 . The chimney cover  15  is installed with the semi-round via hole  150  which is corresponding to the through hole  140  of the top of the chimney  14 . When it is desired to vent smoke out of the receiving chamber  10 , the via hole  150  of the chimney cover  15  is rotated to align the through hole  140  of the chimney  14 . If not used, the via hole  150  is rotated to the top of the chimney  14  to prevent undesired object to fall into the chimney  14 ). Thereby the object B to be baked presents the color and odors due to the effect of smoke. Furthermore, the chimney cover  15  can be covered upon the chimney partially so as to adjust the baking color of the baked object. 
         [0054]    8. In the present invention, the door  16  is pivotally installed at the front surface of the oven body. An elastic door buckle  160  made of steel sheet is fixed upon the door  16 . The door buckle  160  has the protruded stop  161 . The door  16  is installed with the handle  162 . The control panel  17  is installed upon an upper front side of the oven body  1  corresponding to the door  16 . The bottom of the control panel  17  corresponding to the door buckle  160  is installed with the buckling recess  173  for buckling the stop  161  of the door buckle  160  so as to tightly close the door  16 . When the door buckle  160  is pressed downwards, the door can be released for operation. After baking, the door  16  is opened for taking out the object B. Firstly, the door buckle  160  is pressed downwards (referring to  FIG. 10 ) so that the stop  161  on the door buckle  160  separates from the buckling groove  173  of the control panel  17 . Then the hand holds the handle  162  of the door  16  for opening the door  16  fully and thus taking out the object B. 
         [0055]    9. In the present invention, the control panel  17  has installed with the switch  170 , the button  171 , and an indication light  172 . The user can adjust the baking temperature and time from the control panel and view the operation states from the window on the door  16 . 
         [0056]    10. In the present invention, the drawer type water box  18  is installed at the lower side of the door  16 . The water box  18  can be inserted into the trench  105  at the lower side of the ‘oven body  1 . The water box  18  serves for condensing the water draining out from the door  16 . The water box  18  can be drawn out for cleaning. Furthermore, in baking, the vapor from the object B is condensed to the water box  18  as the door  16  is opened with flowing out to outside. 
         [0057]    11. In the present invention, the box body  20  has the tapered bottom. The rear side of the box body  20  has the through hole  200  for receiving the heating tube  11 . The box body  20  is installed with the plurality of vent holes  201 . The front side of the box body  20  is protruded with the handle  202 . The net  21  is installed in the box body  20 . The size of the net  21  is smaller than an upper portion of the box body  20  and smaller than the lower side of the box body  20  so that the net  21  can be positioned at the middle section of the box body  20 . The net  21  can support smoking woods. The box cover  22  is pivoted to the box body  20  through the hinge  23 . One side of the hinge  23  is firmly secured to the side of the box body  20  having the through hole  200 . Another side of the hinge  23  is combined with the box cover  22  so that when the cover  22  covers upon the box body  20 , the cover  22  is pivoted with respect to the box. 
         [0058]    The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.