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1. 发明专利

JPH0451488A EMPTY SENSING DEVICE FOR COOKING APPARATUS OF ELECTRO-MAGNETIC INDUCTION HEATING TYPE 失效
公开(公告)号：JPH0451488A
公开(公告)日：1992-02-19
申请号：JP15963090
申请日：1990-06-20
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA
IPC分类号： H05B6/12
摘要： PURPOSE:To achieve the function to make independent empty sensing accurately and safely by means of addition of a simple circuit by providing at least two electrodes on a flat plate form heating coil so that a capacitor series circuit is formed. wherein the bottom of a metal object to be heated which is placed with a top plate interposed, should work as a common electrode. CONSTITUTION:Through metal pieces for connection 12, 16, electrodes 14, 18 are installed at the ends of a heater coil 10 in the form of flat plate, i.e., at the wind starting part A and wind ending part B. With a top plate 22 interposed, steel 24 as a metal object to be heated is placed on these electrodes 14, 18. When a deep pan 24 is placed on this top plate 22 arranged on the heater coil 10, a capacitance is formed between the pan bottom and each of the electrodes 14, 18, and this capacitor series circuit constitutes a new closed circuit by reference to the supply voltage of the heater coil 10, and a capacitor current I flows in this closed circuit.

2. 发明专利

JPS6260899B2 失效
公开(公告)号：JPS6260899B2
公开(公告)日：1987-12-18
申请号：JP18603080
申请日：1980-12-26
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA , SHIRAI KAZUYA , IWAMA KAZUO
IPC分类号： H02J7/00 , G05F1/56 , H02H7/20

3. 发明专利

JPH05205862A ELECTROMAGNETIC INDUCTION HEATING TYPE COOKER 失效
公开(公告)号：JPH05205862A
公开(公告)日：1993-08-13
申请号：JP4678792
申请日：1992-03-04
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA
IPC分类号： H05B6/12
摘要： PURPOSE:To automatically stop heating and automatically cut off power supply by surely detecting a pan absent state in which a pan is not placed on a top plate in an electromagnetic induction heating type cooker. CONSTITUTION:A first condition signal of a first condition detecting circuit which is output when high frequency current fed to a heating coil is larger than a predetermined value, a second condition signal of a second condition detecting circuit which is output when power input current is dropped below a predetermined value, and a third condition signal of a third condition detecting circuit which is output when the phase lag of current with respect to the voltage of a power input portion becomes more than a predetermined value, are employed as the conditions of detecting the absence of a pan. A transistor 76 is driven in response to the output of an AND circuit 74 to which the three signals are input, so as to operate a relay 78. Roughly 100% detection of the absence of the pan is thus carried out and a timer circuit not shown in Figure performs automatic stopping of heating and automatic cutoff of power supply in accordance with an output indicative of the detection of the absence when the time of the absence of the pan continues beyond a predetermined time.

4. 发明专利

JPH01260781A DEVICE FOR INDUCTION HEATING OF COOKING CONTAINER 失效
公开(公告)号：JPH01260781A
公开(公告)日：1989-10-18
申请号：JP8650988
申请日：1988-04-08
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA
IPC分类号： H05B6/12
摘要： PURPOSE:To make a structure compact as well as to enable plural numbers of cooking containers to be simultaneously heated by arranging induction heating coils coiled in a spiral form in the axial direction, and thereby providing the side face of the coils with positioning means for the cooking containers in spaces wherein the respective metallic containers in a plate form are inserted while being vertically held. CONSTITUTION:Each induction heating coil 1 coiled in a spiral form is provided in a gap interspaced with each adjacent mounting plate 14a, and appropriate numbers of spaces in a recessed cross sectional form are arranged wherein metallic cooking containers 11 in a plate form can be inserted while being vertically held. And each guiding groove 17 is cut out on the bottom section of each space 12 for each peripheral section of the containers so that each container 11 can be easily inserted while being slid in the horizontal direction. Each cooking container 11 is pressed against the insulation plate 16 of the coil 1 by each positioning means 13 composed of a pressing spring 18 in a coil form and the like provided for the space 12 at its bottom section so as to be positioned for letting it be held. This constitution thereby enables plural numbers of the cooking containers to be simultaneously heated, and eliminates wide insulation spaces, thereby making the cost of equipment inexpensive with heating efficiency improved.

5. 发明专利

JPS53110582A MULTICONTACT SPEED DETECTOR 失效
公开(公告)号：JPS53110582A
公开(公告)日：1978-09-27
申请号：JP2472177
申请日：1977-03-09
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA
IPC分类号： G01P3/46
摘要： PURPOSE:To make possible the accurate detection of speeds at multiple points by energizing relays through transistors of different set voltages by the power corresponding to the revolving speeds of a generator revolving cooperatively with a revolving body.

6. 发明专利

JPS6323522A NON-INTERRUPTING ELECTRIC SOURCE 失效
公开(公告)号：JPS6323522A
公开(公告)日：1988-01-30
申请号：JP16588886
申请日：1986-07-15
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUNAGA TETSUO , AWATANI KOJI , SHIMIZU TAKAHISA
IPC分类号： H02J9/06

7. 发明专利

JPS5794819A CURRENT CONTROL SYSTEM OF CONSTANT VOLTAGE CIRCUIT 失效
公开(公告)号：JPS5794819A
公开(公告)日：1982-06-12
申请号：JP17116180
申请日：1980-12-03
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA , SHIRAI KAZUYA , IWAMA KAZUO
IPC分类号： G05F1/56 , G05F1/573
摘要： PURPOSE:To simplify the structure of a constant voltage power supply device with a reduction of cost, by protecting both a control transistor and load against the overcurrent through a simple reduction control circuit consisting of a resistance and a transistor. CONSTITUTION:When the output voltage V0 of a constant voltage circuit 4 increases, the collector current IL of a control transistor TR8 reduces. Then the voltage V0 of the circuit 4 reduces to be set at a certain level at all times. On the other hand, the load resistance of a load 5 is reduced to satisfy ILXRO> VBE (RO: resistance for detection of load current; VBE: base-emitter voltage). Thus a TR15 of a reduction control circuit 10 conducts, and the potential V1 of a point 13 of connection increases. As a result, the potential of the output terminal of an operational amplifier 6 is reduced to reduce the collector current of a TR7, and accordingly the base current of the TR8 is reduced. As a result, the current IL of the TR8 is reduced. Thus the TR8 and the load 5 are protected against the overcurrent.

8. 发明专利

JPS52137617A SETTING SIGNAL TRANSMISSION SYSTEM IN BRUSHLESS EXCITATION REGULATOR 失效
公开(公告)号：JPS52137617A
公开(公告)日：1977-11-17
申请号：JP5408176
申请日：1976-05-12
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA
IPC分类号： H02P9/14
摘要： PURPOSE:To maintain stable voltage characteristic during load throw-in by providing voltage setting signal from fixed section to conventional controller installed in rotor section.

9. 发明专利

JPH02210788A INDUCTION HEATING COKING APPARATUS 失效
公开(公告)号：JPH02210788A
公开(公告)日：1990-08-22
申请号：JP3015089
申请日：1989-02-09
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA
IPC分类号： H05B6/12
摘要： PURPOSE:To enable efficient heating and obviate the use of many kinds of induction heating cooking devices fitted for various kinds of pans by changing the winding number of a heating coil so as to adjust an electric power absorbed to the pan. CONSTITUTION:The insulative material of a coil copper wire 7 at the swaged portion of a heating coil 1 is peeled off from the half of the wound portion to the last, and then, a copper ring 2 is pressed with pressure. A projected terminal 4 is attached to the copper ring 2 so as to be fastened together with a pressing terminal 3 by a screw 5. A lead wire 6 is pressed with pressure to the pressing terminal 3. The drawing portion of the lead wire 6 is covered with a heat resistant contraction tube 8 while the other end of the lead wire 6 is connected to the contacts A-C of a switch 9. Therefore, the heating coil is disposed together with a heating inverter so that it can be selected in order to supply the most effective electric power irrespective of the state of a pan.

10. 发明专利

JPS57110037A SHORTCIRCUIT PROTECTION SYSTEM IN CHARGER 失效
公开(公告)号：JPS57110037A
公开(公告)日：1982-07-08
申请号：JP18603080
申请日：1980-12-26
申请人： FUJI ELECTRIC CO LTD
发明人： SHIMIZU TAKAHISA , SHIRAI KAZUYA , IWAMA KAZUO
IPC分类号： H02J7/00 , G05F1/56 , H02H7/20

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