• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a heater driving control apparatus for an ultra-high frequency oscillation tube used in a microwave oven, the power supply unit (Power Supply 10) for converting and outputting commercial power to the initial drive power and general drive power, and the power supply 10 Temperature for measuring the temperature of the switch unit 20 for providing the initial drive power or general drive power output from the heater 30 and the cathode 40 heated according to the heat generated by the heater 30 when the initial drive power is applied. The sensor 50 and the comparison unit 60 which compares the temperature value measured by the temperature sensor 50 with a preset reference temperature and generates a comparison signal when the measured temperature reaches the reference temperature. The switching unit 20 is controlled such that initial driving power from the supply unit 10 is applied to the heater 30, and when the comparison signal is provided from the comparator 60, the switching unit is applied such that general driving power is applied to the heater 30. Article 20 It is a control unit 70 for the configuration. Therefore, the present invention has the effect of reducing the ultra-high frequency generation time by minimizing the cathode to reach the electron emission temperature faster by providing a higher voltage power to the heater during the initial driving of the microwave oven.
    公开号:KR19990056513A
    申请号:KR1019970076508
    申请日:1997-12-29
    公开日:1999-07-15
    发明作者:엄성진
    申请人:전주범；대우전자 주식회사；
    IPC主号:
    专利说明:

    Heater driving control device of microwave generator tube used in microwave oven
    The present invention relates to a heater driving device for an ultra-high frequency oscillation tube used in a microwave oven, and in particular, a heater driving control apparatus for an ultra-high frequency oscillating tube used for a microwave oven for minimizing an electron emission time of a cathode according to heat generation of a heater. It is about.
    In general, a microwave oven generates friction heat generated by molecular motion between microwaves and foods by radiating microwaves generated from microwaves, such as magnetrons, to foods in a state where food is placed in a cavity. To cook food.
    Such a microwave oven can be largely divided into a key input unit, a microwave generator, a microcomputer, a display unit, and a heating chamber.
    The key input unit includes a key pad for setting a cooking time of the microwave oven and various automatic cooking menus.
    In addition, the microcomputer is configured to control the operation of the entire microwave oven, such as cooking time and cooking intensity, and includes a timer for counting a heating time, that is, a cooking time, and a memory for storing data for various single cooking functions. do.
    The display unit is composed of light emitting elements for displaying various cooking times and cooking conditions, respectively.
    In addition, the heating chamber is composed of a heating plate for heating the sealed food, a turntable and a door for dispensing food.
    Lastly, the ultra-high frequency generating section is composed of an ultra high frequency oscillating tube which generates ultra high frequency, a waveguide which leads the ultra high frequency to the heating chamber, and a cooling fan that cools the magnetron and a transformer which generates the heater voltage and DC high voltage required for the operation of the ultra high frequency oscillating tube ( High Voltage Transformer), high voltage capacitor, high voltage diode, etc.
    On the other hand, as the ultra-high frequency oscillation tube as described above, as a kind of two-pole vacuum tube for generating microwaves, magnetron driven by a high voltage of 4 KV and klystron employing a magnet have been used. It has been developed and applied to microwave ovens, Micro-Klystrode that can reduce the risk of high voltage and achieve light weight.
    On the other hand, the ultra-high frequency oscillation tube as described above is equipped with a heater for heating the cathode to emit electrons from the cathode, which is heated by a predetermined AC power source to heat the cathode by indirect heating method, the cathode Is heated to about 1000 to 1100 ℃ by the heat of the heater to release the electrons.
    However, in order for the microwave to operate normally, the microwave oscillation tube should generate microwaves, that is, microwaves within at least 5 seconds, and thus, minimize the time for the cathode to emit electrons.
    However, in the related art, since a constant AC power is always applied to a heater for heating the cathode, a minimum heating time is required for the cathode to emit electrons to generate ultra-high frequency, and accordingly, the electron emission time of the cathode cannot be reduced to a minimum. There was a problem.
    The present invention has been made to solve the above problems, an object of the present invention is to control the driving of the heater to minimize the time for the cathode constituting the ultra-high frequency oscillation tube to emit electrons during the initial driving The present invention provides a heater driving control apparatus for an ultra-high frequency oscillation tube used in a stove.
    According to a preferred embodiment of the present invention for achieving the above object, in the apparatus for controlling the driving of the heater to emit the electrons of the cathode constituting the ultra-high frequency oscillation tube of the microwave oven, initializing the commercial power applied from the outside A power supply for converting and outputting the initial driving power at the time of driving and the general driving power at the time of normal driving, and a switching unit for providing the initial driving power or the general driving power output from the power supply to the heater; When the initial driving power is applied to the heater, the temperature sensor for measuring and outputting the temperature of the cathode heated by the heating of the heater, and the temperature sensor by comparing the temperature value provided from the temperature sensor with a preset reference temperature When the temperature measured at reaches the reference temperature, a comparison signal is generated accordingly. And a comparing unit and the switching unit to provide the initial driving power of the power supply unit to the heater during the initial driving, and when the comparison signal is provided from the comparing unit after the initial driving, the switching unit transfers the general driving power to the heater. It is configured to include a control unit for controlling to provide.
    1 is a block diagram illustrating a heater driving control apparatus for an ultra-high frequency oscillation tube used in a microwave oven according to a preferred embodiment of the present invention.
    <Description of the code | symbol about the principal part of drawing>
    10: power supply 20: switching unit
    30: heater 40: cathode
    50: temperature sensor 60: comparison unit
    70: control unit
    Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
    1 is a block diagram showing a heater driving control device of the ultra-high frequency oscillation tube according to a preferred embodiment of the present invention.
    As shown in FIG. 1, a heater driving control apparatus of an ultra-high frequency oscillation tube according to the present invention includes a power supply unit 10 for converting and outputting commercial power into initial driving power and general driving power, and a power supply unit ( Measures the temperature of the switching unit 20 that provides the initial driving power or general driving power output from the 10) to the heater 30 and the cathode 40 heated according to the heat generated by the heater 30 when the initial driving power is applied. Comparing the temperature sensor 50 and the temperature value measured by the temperature sensor 50 with a preset reference temperature when the measured temperature reaches the reference temperature, the comparator 60 for generating a comparison signal accordingly, and the initial drive Control the switching unit 20 so that initial driving power from the power supply unit 10 is applied to the heater 30, and when the comparison signal is provided from the comparator 60, the general driving power is applied to the heater 30. To control the switching unit 20 It is a control unit 70, and configuration.
    The power supply unit 10 converts 110-220 Vac commercial power applied from the outside into initial driving power and general driving power and outputs the converted power. In other words, when the power supply unit 10 is formed of a transformer or the like, when the power source and the cathode 40 to reduce the electron emission time of the cathode 40 when the commercial power input is initially driven, the cathode 40 is heated to the electron emission temperature. Is converted into a general driving power and output to the switching unit, wherein the initial driving power is a power having a relatively higher voltage than the general driving power. In addition, as shown in FIG. 1, the output terminal A outputs initial driving power to the switching unit 20, and the output terminal B provides general driving power to the switching unit 20, and also output terminal. (C) is a common terminal.
    On the other hand, the switching unit 20 is switched under the control of the control unit 70 to provide one of the initial driving power and the general driving power output from the power supply unit 10 to the heater 30, during the initial driving, That is, at the time of initial driving of the microwave oven, the switch S1 and the switch S2 are connected to the terminal D and the terminal E, respectively, so that the initial driving power output from the output terminal A of the power supply unit 10 can be obtained. Provided to the heater 30, when the heater 30 generates heat by this initial driving and the cathode 40 reaches the electron emission temperature, the switch S1 and the switch S2 are connected to the terminal F and the terminal G. It is connected to provide a general drive power to the heater 30, this switching unit is composed of a relay or the like.
    In addition, the temperature sensor 50 measures the temperature of the cathode 40 heated according to the heat generated by the heater 30 when the initial driving power is applied to the heater 30 through the switching unit 20 as described above. 60, which is mounted at a predetermined position of the cathode 40.
    The comparator 60 compares the temperature value measured and provided by the temperature sensor 50 with a preset reference temperature, for example, 1000 to 1100 ° C. and when the measured temperature reaches the preset reference temperature, the comparison signal is output accordingly. It is generated by the control unit 70.
    The controller 70 controls the switching unit 20 so that the initial driving power output from the terminal A of the power supply unit 10 is applied to the heater 30 during the initial driving of the microwave oven, and the comparison unit 60 When the comparison signal is provided from the control unit 20 so that the general driving power is applied to the heater (30).
    Referring to the operation of the heater drive control device of the ultra-high frequency oscillation tube according to the present invention configured as described above are as follows.
    First, when a key signal for driving a microwave is provided from a key input unit (not shown), the power supply unit 10 converts input commercial power into initial driving power and general driving power to output the terminal A and the output. Output through terminal (B).
    On the other hand, since the switch 20 is in a state in which the switch S1 and the switch S2 are connected to the terminal D and the terminal E during the initial driving of the microwave oven, the switching unit 20 is outputted from the output terminal A. The driving power is provided to the heater 30, and accordingly the heater 30 generates heat to heat the cathode 40.
    When the cathode 40 starts to be heated by the heat generated by the heater 30 by the initial driving power, the temperature sensor 50 measures the temperature of the cathode 40 and provides it to the comparator 60.
    Accordingly, the comparator 60 compares the temperature value measured and provided from the temperature sensor 50 with a preset reference temperature, and provides the comparison signal to the controller 70 when the measured temperature reaches the reference temperature. .
    On the other hand, the control unit 70 generates a control signal to the switching unit 20 when the comparison signal is provided from the comparator 60, the switch (S1) and the switch (S2) is switched to the terminal (F) and the terminal (G) The switching unit 20 provides the general driving power from the power supply unit 10 to the heater 30 by being connected to the heater 30.
    On the other hand, when the driving of the microwave is completed, the controller 70 controls the switching unit 20 so that the switch S1 and the switch S2 are switched to be connected to the terminal D and the terminal E. In operation of the microwave oven, the switching unit 20 provides initial driving power to the heater 30.
    As described above, the present invention has the effect of reducing the ultra-high frequency generation time by minimizing the cathode to reach the electron emission temperature faster by providing a higher voltage power to the heater during the initial driving of the microwave oven.
    权利要求:
    Claims (5)
    [1" claim-type="Currently amended] In the apparatus for controlling the drive of the heater to allow the cathode constituting the microwave oven of the microwave emits electrons,
    A power supply for converting and outputting commercial power applied from the outside into an initial driving power at initial driving and a general driving power at normal driving;
    A switching unit for providing initial driving power or general driving power output from the power supply unit to the heater;
    A temperature sensor for measuring and outputting a temperature of a cathode heated by heat of the heater when the initial driving power is applied to the heater;
    A comparison unit which compares the temperature value provided from the temperature sensor with a preset reference temperature and generates a comparison signal accordingly when the temperature measured by the temperature sensor reaches the reference temperature;
    When the microwave oven is initially driven, the switching unit provides the initial driving power of the power supply unit to the heater, and when the comparison signal is provided from the comparing unit after the initial driving, the switching unit is controlled to supply the general driving power to the heater. Heater drive control device of the ultra-high frequency oscillation tube comprising a control unit to provide.
    [2" claim-type="Currently amended] The apparatus of claim 1, wherein the power supply unit is formed of a transformer.
    [3" claim-type="Currently amended] 3. The heater driving control apparatus for an ultra-high frequency oscillation tube according to claim 2, wherein the switching unit comprises a relay.
    [4" claim-type="Currently amended] 4. The heater drive control apparatus for an ultra-high frequency oscillator tube according to claim 3, wherein the initial driving power source is a power source whose voltage is higher than the normal driving power source by a predetermined level.
    [5" claim-type="Currently amended] The apparatus of claim 4, wherein the preset reference temperature is 1000 to 1100 ° C. 6.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-12-29|Application filed by 전주범, 대우전자 주식회사
    1997-12-29|Priority to KR1019970076508A
    1999-07-15|Publication of KR19990056513A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970076508A|KR19990056513A|1997-12-29|1997-12-29|Heater driving control device of microwave generator tube used in microwave oven|
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