Patent Publication Number: US-2010116820-A1

Title: Induction electrical appliance

Description:
FIELD OF THE INVENTION 
     The present invention relates to an induction electrical appliance, more particularly, to an induction electrical appliance which generates power by the electromagnetic induction of extra magnetic. 
     PRIOR ART 
     Referring to  FIG. 1 , generally, an electrical appliance in prior art such as grill comprises an upper cover  1   a , a lower cover  2   a,  two pans  4   a  and two electric heating tube  3   a.  One side edge of said upper cover  1   a  pivotally connected with one side edge of said lower cover  2   a,  said two electric heating tubes  3   a  disposed inside said upper cover  1   a  and said lower cover  2   a  respectively, said two pans  4   a  fixedly connected to said upper cover  1   a  and said lower cover  2   a  respectively for placing food. When a current flows through the two electric heating tubes  3   a,  the resistance wire inside said the two electric heating tubes  3   a  is heated to generate heat energy to heat the two pans  4   a,  thus the food is cooked. 
     However, limited by the security regulations of household current, the abovementioned electrical appliance in prior art can not get higher current, thus it only can cook the food in a relatively lower temperature. Therefore, due to the lower cooking temperature, on one hand, the cooking time is long relatively, and the use energy is increased, on the other hand, it can not select a relatively higher cooking temperature according to different food, and the taste of the food is effected. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide an induction electrical appliance, which can generate higher heat energy by the electromagnetic induction of extra magnetic to enlarger the range of the cooking temperature, thereby the users can select optimal cooking temperature according to the food material to let the food be more delicious. 
     To achieve the abovementioned object, the present invention provides an induction electrical appliance comprising: a first shell disposed with a bottom base; a first pan detachably connected to said first shell; a first heating element fixedly connected to said first pan; and an induction coil fixedly connected to said bottom base, said induction coil electrically connected to said first heating element. 
     The present invention has the following advantages: 
     Firstly, the induction coil produces inducted current by extra magnetic field, the inducted current heat said first heating tube and heat the first pan. Thereby, the food can be cooked by the heat generated by the way of magnetic induction. 
     Secondly, the current value of the induced current generated by the induction coil is related to the material, the circle number and arrangement of the induction coil, and a current higher than the household current can be provided. Thereby, higher current produces higher heat energy, the warm-up time of the first pan and the cooking time of food is shortened, and the energy is saved. 
     Thirdly, higher heat energy rise the cooking temperature of first pan and the cooking temperature range is enlarged. Thereby, the cooking temperature can be adjusted according to the different food to let the food more delicious. 
     The present invention will be apparent in its technical content and effect to be achieved after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an electrical appliance of prior art; 
         FIG. 2  is a sectional view of the induction electrical appliance of the present invention; 
         FIG. 3  is an exploded view of the induction electrical appliance of the present invention. 
         FIG. 4  is a block/schematic diagram of induction electrical appliance with an electric platform of the present invention; 
         FIG. 5A to 5G  illustrate the use state of the induction electrical appliance cooperated with the electric platform of the present invention. 
     
    
    
     In these figures 
     
       
         
           
               
               
             
               
                   
               
             
            
               
                 upper cover 1a 
                   
               
               
                 lower cover 2a 
               
               
                 electrical heating tube 3a 
               
               
                 pan 4a 
               
               
                 first shell 1 
               
               
                  bottom base 11 
                 first containing chamber 12 
               
               
                  clamping portion 13 
                 fixing portion 14 
               
               
                 first pan 2 
               
               
                  first grilling surface 21 
                 first heating surface 22 
               
               
                 first heating element 3 
               
               
                 second shell 4 
               
               
                  upper base 41 
                 second containing chamber 42 
               
               
                  groove 43 
                 handle 44 
               
               
                 second pan 5 
               
               
                  second grilling surface 51 
                 second heating surface 52 
               
               
                 second heating element 6 
               
               
                 induction coil 7 
               
               
                  induction fixing disc 71 
               
               
                 electric control module 8 
               
               
                  RF reception and emission module 81 
               
               
                  Temperature detecting circuit 82 
                 identification chip 83 
               
               
                  AC/DC power module 84 
               
               
                  energy-storing circuit 85 
               
               
                 electric platform 9 
               
               
                  driving module 91 
               
               
                  RF reception and emission module 
               
               
                  of the electric platform 92 
               
               
                  Induction coil of the electric 
               
               
                  platform 93 
               
               
                  AC power 94 
               
               
                  coffee maker 10 
               
               
                  electric kettle 11 
               
               
                  blender appliance 12 
               
               
                  bread maker 13 
               
               
                  electric cooker 14 
               
               
                  electric iron 15 
               
               
                   
               
            
           
         
       
     
     PREFERRED EMBODIMENT OF THE INVENTION 
     Referring to  FIG. 2  and  FIG. 3 , the induction electrical appliance of the present is a grill comprising: a first shell  1  disposed with a bottom base  11  and a first containing chamber  12  formed by the inner wall of said first shell  1 . Each of the two sides of the bottom base  11  has a clamping portion  13 , a first pan  2  is disposed on the top of first base  11 , the first pan  2  is fixedly connected to the first shell  1  by a pair of fixing portions  14 , the first pan  2  can be easily detached from the first shell  1  to be cleaned. One side of the first pan  2  has a first grilling surface  21  for placing food, the opposite side has a first heating surface  22 , said first heating surface  22  is fixedly connected to a first heating element  3  disposed inside the first containing chamber. A induction coil  7  is disposed in the bottom of the bottom base  11  of the first shell  1 , said induction coil can be placed on a coil fixing disc  71  and fixedly connected to the bottom of the bottom base  11 , said induction coil  7  electrically connected to the first heating element  3 . 
     One side of the first shell  1  pivotally connected to one side of a second shell  4  via the fixing portion  14  so that said second shell  4  can be covered on the first shell  1  or arranged with the first shell  1  side by side. The second shell  4  has an upper base  41  and a second containing chamber  42  surrounded by the inner wall of the second shell  4   
     A handle  44  is mounted on one side of the upper base  41 , and the two sides of the upper base  41  has a pair of grooves  43  which are corresponding to the clamping portions  13 , when the second shell  4  is covered on the first shell  1 , the two clamping portions  13  coupled with the two grooves  43 . A second pan  5  is disposed on one side of the upper base  41 , the second pan  5  is fixedly connected to the second shell  4  by the fixing portions  14 , the second pan  5  can be easily detached from the second shell  4  to be cleaned. One side of the second pan  5  has a second grilling surface  51  for placing food, the opposite side has a second heating surface  52 , said second heating surface  52  is fixedly connected to a second heating element  6  disposed inside the second containing chamber  42 . Said second heating element  6  is a heating tube and electrically connected to the first heating element  3 . 
     If disposed in an extra magnetic field, the induction coil  7  will react with the extra magnetic field and generate induced current, the induced current flow through the first heating element  3  to heat the resistance inside the first heating element  3  so as to produce heat energy, the heat energy is transferred to the first pan  2  by heat transfer effect, the temperature of the first grilling surface  21  of the first pan  2  is rise to cook the food. While the second heating element  6  electrically connected to the first heating element  3 , the induction current also will flow through the second heating element  6 , thus the second grilling surface  51  of the second pan  5  also can be used for cooking food. 
     In addition, the current value of the induced current generated by the induction coil  7  is related to the material, the circle number and arrangement of the induction coil  7 , and a current higher than the household current can be provided. Thereby, higher current produces higher heat energy, the warm-up time of the first pan  2  and the second pan  5  and the time of cooking food can be shortened, thus the energy is saved. More over, higher heat energy rise the cooking temperature of first pan  2  and the second pan  5  and the cooking temperature range is enlarged. Thereby, the cooking temperature can be adjusted according to the different food to let the food to be more delicious. 
     The base  11  of the first shell  1  further comprises an electric control module  8  (as is shown in  FIG. 3 ), the electric control module  8  is well known in the art, so only the operating principle is described herein. The electric control module  8  has a RF reception and emission module  81  and a AC/DC power module  84  (as is shown in  FIG. 4 ) The induced current generated by the induction coil  7  is transferred to direct current by the AC/DC power module  84 , and the direct current is then output to an energy-storing circuit  85  which is the power source for the RF reception and emission module  81 , the energy-storing circuit  85  also can store power for continuously providing power to the RF reception and emission module  81  to operate under the circumstance that there is not induced current. The RF reception and emission module  81  is also connected to a temperature detecting circuit  82  and an identification chip  83 , the temperature detecting circuit  82  connected to the first grilling surface  21  and the second grilling surface  51 , thus the temperature detecting circuit  82  can detect the temperature of the first grilling surface  21  and the second grilling surface  51  and output a temperature parameter to the RF reception and emission module  81 . Moreover, the RF reception and emission module  81  also can receive the identifier generated by the identification chip  83 . 
     In use, the induction electrical appliance of the present invention is placed on an electric platform  9  (as shown in  FIG. 5A ), the electric platform  9  has a RF reception and emission module  92  (as shown in  FIG. 4 ) which can transfer and receive information to the RF reception and emission module  81 , said information comprises temperature parameter and identifier. After being received the temperature parameter and identifier, the RF reception and emission module  92  of the electric platform output an electrical signal to a driving module  91 , the driving module  91  is electrically connected to an AC power  94 , and the driving module  91  can determinate to provide the alternating current produced by the AC power  94  to an induction coil  93  of the electric platform or not according to the electrical signal. When the alternating current flow through the induction coil  93  of the electric platform, time-varying electromagnetic field is generated, the induction coil  7  react with the time-varying electromagnetic field to generate induced current, then the induced current is output to the first heating element  3  and the second heating element  6  to heat the resistance inside the first grilling element  3  and the resistance inside the second heating element  6 , thus the temperature of the first grilling surface  21  and the second grilling surface  51  is rise. 
     In summary, place the induction electrical appliance of the present invention on the electric platform  9  to use, the time-varying electromagnetic field of the induction coil  7  will react with that of the induction coil  93  of the electric platform to generate induced current, the induced current level can be determinate by the arrangement, the circle number and the material of the induction coil  7 , thereby to provide a high power (about 3000 W) which is higher than the commercial power (1500 W) to improve the heating speed so as to shorten the time of cooking and save the energy. In addition, to determinate whether to continuously provide power according to the temperature of the first grilling surface  21  and the second grilling surface  51  in heating, the heating temperature is automatically controlled in a temperature range, thus the cooking temperature can be selected according to different food, so as to add the delicious taste of the food. 
     However, the induction electrical appliance of the present invention also can be used by placing on an induction cooker or an electric heat stove with high power, so that the induction coil  7  react with the extra magnetic field to achieve the abovementioned heating principle, and add the convenience of using the induction electrical appliance. Moreover, the first heating element  3  and the second heating element  6  of the present invention can be varied, the first heating element  3  and the second heating element  6  can be replaced by a driving element (not shown) such as a heater or a motor to electrically connected to the induction coil  7 . thus the induction electrical appliance such as coffee maker  10 , electric kettle  11 , blender appliance  12 , bread maker  13 , electric cooker  14  and electric iron  15  (referring to  FIG. 5B  to  FIG. 5G ) can be placed on the electric platform  9 , to provide a high power which is higher than the commercial power to improve efficiency of the induction electrical appliance. 
     The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.