Patent Document

FIELD OF THE INVENTION 
       [0001]    The present invention relates to an electric iron. 
       BACKGROUND OF THE INVENTION 
       [0002]    Traditional electric iron has an electric heating plate on the bottom of the housing. In ironing, the electric heating plate of the iron has high temperature; after the ironing is stopped, the electric heating plate needs long time to be cooled so as to be stored safely. 
       SUMMARY OF THE INVENTION 
       [0003]    The primary object of the present invention is to provide an automatically cooling iron which is capable of being automatically cooled after stopping using so as to be stored quickly. 
         [0004]    The object is achieved by providing: An automatically cooling iron comprising a housing, an electric heating plate disposed on the bottom of said housing, the inside of the housing is disposed with a fan\ a motion status detector and an automatic switch circuit; said motion status detector provides the signal of the stopping of the iron to said automatic switch circuit, said automatic switch circuit is used to calculate the time of the stopping and controls the fan to blow the electric heating plate. 
         [0005]    said motion status detector is a ball switch which can provide three kinds of status information: statically and horizontally placing/statically and vertically standing/motion; the automatic switch circuit comprises a heating switch\ a fan switch and a microprocessor; the microprocessor will calculate of horizontally placing time when said ball switch input the statically and horizontally placing information utill motion information be inputted and when the horizontally placing time is reach to a first time period, the microprocessor will control said heating switch to cut off the power of the electric heating plate and control the fan switch to connect to the power of the fan; or the microprocessor will calculate of the vertical standing time when the ball switch input the vertical standing static information until motion information be inputted and when the calculation of the vertical standing time is reach to a second time period, the microprocessor will controls the heating switch to cut off the power of the electric heating plate and control the fan switch to connect to the power of the fan. 
         [0006]    Said microprocessor will calculate the working time of the fan and when the working time of the fan is calculated to a third time period, then the microprocessor will control the fan switch to cut off the fan power. 
         [0007]    Said first time period is 30 seconds, said second time period is 3 minutes, said second time period is 15 minutes. 
         [0008]    Said housing is provided with an air inlet, said fan is disposed in the tube mounted between said air inlet and said electric heating plate. 
         [0009]    The automatically cooling iron of the present invention is to detect whether the iron is stopped by a motion status detector, once the iron is stopped, the motion status detector will provide a stopping signal to the automatic switch circuit, the automatic switch circuit will calculate the time of stopping and control the fan to blow to the electric heating plate. Although the electric heating plate has high temperature after ironing, the air flow provided by the fan can let the electric heating plate to be cooled rapidly so as to save time to be stored. Said motion status detector is a ball switch which can provide three kinds of status information: statically and horizontally placing/statically and vertically standing/motion; the automatic switch circuit comprises a heating switch\ a fan switch and a microprocessor; the microprocessor will calculate the horizontally placing time/vertical standing status information, if said ball switch input the statically and horizontally placing/motion/vertical standing information, and when the horizontal placing time or vertical standing time is reached to a predetermined value, the microprocessor will control the heating switch to cut off the power of the electric heating plate and control the fan switch to connect to the power of the fan. The method that respectively dealing with the situation of the horizontal placing or vertical standing in the stopping of the iron is match to the character of the iron that the stopping time is relatively short in horizontal placing status and is relatively long in vertical standing status. The control of the electric heating plate and the fan is much friendly. The microprocessor calculate the working time of the fan and control the fan switch to cut off the fan power if the working time is reach to a predetermined value. The automatically stopping operation of the fan is friend to users. In a preferred embodiment of the invention, the predetermined value of the horizontal placing is 30 seconds, the vertical standing predetermined value is 3 minutes and the predetermined time of the fan working time is 15 minutes, this is match to the requirement of the user and match to the heating temperature and the cooling time. The housing is provided with an air inlet and the fan is disposed on the tube mounted between the air inlet and the electric heating plate, this facilitates to improve the cooling efficiency. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is an inside structure view of the automatically cooling iron of the present invention in a preferred embodiment. 
           [0011]      FIG. 2  is an exploded view of the embodiment of  FIG. 1   
           [0012]      FIG. 3  is a circuit block diagram of the embodiment of  FIG. 1 . 
           [0013]      FIG. 4  is a sectional view of the ball switch of the embodiment of  FIG. 1 . 
           [0014]      FIG. 5  shows the vertical standing status of the ball switch in the embodiment of  FIG. 1 . 
           [0015]      FIG. 6  shows the horizontal placing status of the ball switch in the embodiment of  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0016]    As is shown in  FIG. 1  and  FIG. 2 , the automatically cooling iron comprises a housing  1 , an electric heating plate  2 , fan  3  and a circuit board  4 . 
         [0017]    A housing handle  11  with shell structure is disposed on the top of the housing  1 , the circuit board  4  is disposed in the concave in the upper portion of the handle  11 ; the handle cover  12  is mounted on the top of the handle  11  to cover the inside of the handle. The rear portion of the housing  1  is disposed with a rear cover  13  which is provided with an air inlet  131 . The housing  1 , handle cover  12  and the rear cover  13  are all made by plastic and have good appearance and well heating insulation. 
         [0018]    The electric heating plate  2  is made by aluminum alloy and is provided with a pre-embedded electric heating tube  24 . The top of the electric heating plate  2  is riveted with a electric heating plate cover  20  to close the electric heating plate  2 . A metal shell  21  for decoration is disposed on the upper of the electric heating plate cover  20 . The metal shell  21  is a box with a downward opening, the rear portion of the top surface of the metal shell  21  is provided with a window  211 , an interstice  25  for air flow is disposed between the side of the metal  21  and the electric heating plate  2 . An insulation board  22  made by heat insulation material is disposed on the upper of the metal shell  21 . The rear portion of the insulation board is provided with a window  221 . The upper surface of the insulation board  22  is disposed with a supporting board  23 , and the rear portion of the supporting board  23  is provided with an inclined tube  231 . 
         [0019]    The fan  3  is mounted inside the housing  1  and is located in the opening of the tube  231  in the rear portion of the supporting board  23  and is towards to the air inlet  131  of the rear cover  13 . 
         [0020]    The circuit board  4  is provided with an automatic circuit  41  and a ball switch  42 . 
         [0021]    Referring to  FIG. 3 : the automatic switch circuit  41  comprises a microprocessor  411 , an alternating current power  412 , a heating switch  413  and a fan switch  414 . The control input terminals of the microprocessor  411  are respectively connected to the first detecting output terminal  421  and a common terminal  424 . The first control output terminal of the microprocessor  411  is connected to the control input terminal of the heating switch  413  and the second control output terminal of the microprocessor  411  is connected to the control input terminal of the fan switch  414 . The alternating power  412  provides alternating power to the heating switch  413  and the fan switch  414 . The output terminal of the heating switch  413  is connected to the heating tube  24  of the electric heating plate  2 . The output terminal of the fan switch  414  is connected to fan  3 . 
         [0022]    Referring to  FIG. 4 , the opening end of the front shell  4201  is clamp to the opening end of the rear shell  4202  of the ball switch  42 , thus an arc guiding chamber  426  is formed between them. A concave contacting piece is embedded in the concaved portion of the front shell  4201  (i.e. the front surface of the guiding chamber  426 ), correspondingly, a concave contacting piece  424 ′ with same size is embedded in the concaved portion of the rear shell  4202  (i.e. the rear surface of the guiding chamber  426 ). 
         [0023]    Referring to  FIG. 5 , the contacting piece of the front shell  4201  is separated into two portions along an direction oblique to the vertical axis by a separating groove  422 , the first portion  421 ′ is connected to a first detecting output terminal  421  which is extending outwardly; the second portion  423 ′ is connected to a second detecting output terminal  423  which is extending outwardly; an electric ball  425  is disposed in the guiding chamber  426 . The distance between the concave portions  4211 / 4231  of the contacting piece of the front shell  4201  of the guiding chamber  426  and the bottom of the concave portion  4241  of the contacting piece  424 ′ of the rear shell  4202  is bigger than the diameter of the electric ball  425 . 
         [0024]    When the ball switch  42  is in statically and vertically standing status, the electric ball  425  is connected to the first portion  421 ′ of the contacting piece of the front shell  4201  and the contacting piece  424 ′ of the rear shell  4202 , thus the first detecting output terminal  421  is connected to the common terminal  424 . While when the ball switch  42  is in moving vertical standing status, the electric ball  425  is jumped slightly between the first portion  421  of the contacting piece of the front shell  4201  and the contacting piece  424 ′ of the rear shell  4202 , so that the first detecting output terminal  421  is connected and unconnected alternatingly to the common terminal  424 . 
         [0025]    Referring to  FIG. 6 , when ball switch  42  is in statically horizontally-placing status, the electric ball  425  is depart from the first portion  421 ′ of the contacting piece of the front shell  4201  but remains contacting with the contacting piece  424 ′ of the rear shell  4202 , thus the first detecting output terminal  421  is un-connected to the common terminal  424 . While when the ball switch  42  is in moving horizontally-placing status, the electric ball  425  is jumped slightly between the first portion  421  of the contacting piece of the front shell  4201  and the contacting piece  424 ′ of the rear shell  4202 , thus the first detecting output terminal  421  is connected and unconnected alternatingly to the common terminal  424 . 
         [0026]    So the ball switch  42  can provide three status information: statically and horizontally placing, statically and vertical standing, and moving. 
         [0027]    In normal ironing, when the iron is horizontally placed and statically. i.e. the ball switch  42  is in statically and horizontally placing status, the first detecting output terminal  421  and the common terminal  424  of the ball switch  42  are in connected status. The microprocessor  411  will startup the horizontally placing time when receive the statically and horizontally placing information from the ball switch. In this period, if the ball switch  411  receive the alternatingly connected and unconnected motion status information from the ball switch  42 , then the calculation of the horizontally placing time is stopped. If the horizontally placing time is calculated to 30 seconds, then the microprocessor  411  controls the heating switch  413  to cut off the power of the electric heating plate  2  and controls the fan switch  414  to connect to the power of the fan  3 . when the fan begin to work, the cooling air of the outside is input into the housing  1  through the air inlet  131  of the rear cover  13 , then the air passes though the tube  231  of the rear portion of the supporting board  23 , the window  221  of the rear portion and the window  211  of the rear portion of the shell  21 , then the cooling air blows to the electric heating plate cover  20  of the electric heating plate  2 , and bring out the heat of the electric heating plate  2 , the hot air is then blow out from the interstice  25  between the side of the shell  21  so that the electric heating plate  2  is to be cooled. The microprocessor  411  then startup the calculation of the working time of the fan, when the working time is calculated to 15 minutes, the electric heating plate  2  is fully cooled; then the microprocessor  411  controls the fan switch  414  to cut off the power of the fan  3 , and the fan  3  will be automatically stopped. Then the power cord can be removed from the power and the iron can be stored. 
         [0028]    When the iron is in statically and vertically standing status. i.e. the ball switch  42  is in statically and vertically standing status, the first detecting output terminal  421  and the common terminal  424  of the ball switch  42  are in unconnected status. After the microprocessor  411  received the vertical standing information from the ball switch  42 , then the vertical standing time calculation is startup; in this period, if the microprocessor  411  receive the alternatingly connected and unconnected motion status information from the ball switch  42 , then stop the calculation of the vertical standing time. When the vertical standing time is calculated to 3 minutes, then the microprocessor  411  controls the heating switch  413  to cut off the power of the electric heating tube  24  of the electric heating plate  2  and control the fan switch  414  to be connected to the power of the fan  3 . After the fan  3  being working, the cooling air of the outside is input into the shell  1  through the air inlet  131  of the rear cover  13 , and then pass through the tube  231  of the rear portion of the supporting board  23 , the window  221  of the rear portion of the insulation board  22  and the window  211  of the rear portion of the shell  1 , blows to the electric heating plate cover  20  of the electric heating plate  2  so as to bring out the heat of the electric heating plate  2 , and the hot air is then blow out from the interstice  25  between the side of the shell  21  and the electric heating plate  1 , thus the electric heating plate  2  is rapidly cooled. The microprocessor  411  then startup the calculation of the working time of the fan, when the working time is calculated to 15 minutes, the electric heating plate  2  is fully cooled; the microprocessor  411  will control the fan switch  414  to cut off the power of the fan  3 , thus the fan  3  will be automatically stopped. Then the power cord can be removed from the power and the iron can be stored. 
         [0029]    Certainly, in the automatic switch circuit  41 , the control input terminals of the microprocessor can also respectively connected to the second detecting output terminal  4231  and the common terminal  424 , this also can achieve the control as described aforementioned, but this needs to change the mounting location of the ball switch  42 . If the ball switch  42  is not used as a motion status detector, it also can use motion detector, horizontally placing detector, vertical standing detector to respectively provide the detecting information to the control input terminal of the microprocessor  411 , but this will make the hardware system to be complex. 
         [0030]    It will be apparent to those skilled in the art that various modifications and variations can be made in a water saving mechanism for a shower device of the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Technology Category: d