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21. 发明授权

US06215112B1 Food amount detector of a microwave oven, a microwave oven employing a food amount detector and a control method thereof 失效
标题翻译：微波炉的食量检测器，使用食量检测器的微波炉及其控制方法
公开(公告)号：US06215112B1
公开(公告)日：2001-04-10
申请号：US09226214
申请日：1999-01-07
申请人： Chul Kim , Tae-soo Park , Kwang-seok Kang , Won-woo Lee
发明人： Chul Kim , Tae-soo Park , Kwang-seok Kang , Won-woo Lee
IPC分类号： H05B668
CPC分类号： H05B6/687 , H05B6/6447 , Y02B40/143
摘要： A food amount detector for automatically detecting the amount of a food placed in a cooking chamber of a microwave oven, a microwave oven employing the food amount detector, and control method thereof. Output voltage of a microwave generator is detected while the microwave oven is driven, and the amount of the food placed in the cooking chamber of the microwave oven is determined based on the output voltage such detected. In accordance with the amount of the food such determined, the food is cooked under the appropriate driving conditions of the microwave oven. Accordingly, the user does not need to determine the amount of the food by himself, or set the driving conditions of the microwave oven such as cooking time, level of microwave energy, etc. As a result, the user finds it convenient when using this microwave oven, and the food is cooked under the exact driving conditions set by the microwave oven. Further, since the price of the parts are inexpensive, the manufacturing cost is reduced, and manufacturing process is simplified, so that productivity is improved.
摘要翻译：一种食物量检测器，用于自动检测放置在微波炉的烹饪室中的食物的量，使用食物量检测器的微波炉及其控制方法。在微波炉被驱动的同时检测微波发生器的输出电压，并且基于检测到的输出电压确定放置在微波炉的烹饪室中的食物量。根据确定的食物的量，在微波炉的适当驾驶条件下烹饪食物。因此，用户不需要自己确定食物的量，或者设定微波炉的烹饪时间，微波能量等的驱动条件。因此，当使用这种方法时，用户觉得很方便微波炉，食物在微波炉设定的精确驾驶条件下烹制。此外，由于零件的价格便宜，所以制造成本降低，并且制造工艺简化，从而提高生产率。

22. 发明授权

US06169682A Non-directional frequency generator spark removal circuit 失效
标题翻译：无方向频率发生器火花去除电路
公开(公告)号：US06169682A
公开(公告)日：2001-01-02
申请号：US09501605
申请日：2000-02-10
申请人： Yong-woon Han , Seong-deog Jang , Kwang-seok Kang , Han-jun Sung
发明人： Yong-woon Han , Seong-deog Jang , Kwang-seok Kang , Han-jun Sung
IPC分类号： H02M760
CPC分类号： H01R39/46 , H02M7/60
摘要： A non-directional frequency generator for converting direct current into alternating current includes a direct current input end connected with a direct current power source and an alternating current output end connected with an alternating current output section to prevent a spark of the non-directional frequency generator. The non-directional frequency generator converts direct current inputted from the direct current power source into alternating current, and outputs the alternating current to the alternating current output section. First and second switching sections are connected with the direct current input end and the alternating current output end in order to control the conducting status of the direct current input end and the alternating current output end of the non-directional frequency generator, respectively. A third switching section is connected in parallel with the first switching section, and is intermittently switched on when the second switching section is switched on and the first switching section is switched off. The first and second switching sections are relays, while the third switching section is an integrated gate bipolar transistor. When direct current is applied, a microcomputer switches on the non-directional frequency generator and the second switching section, and intermittently applies the direct current to the non-directional frequency generator through switching means until the first switching section is switched on. Accordingly, difference between impedances of input and output sides of the non-directional frequency generator is decreased, and the spark is prevented. Further, since direct current is intermittently applied during a brush-on period in which a conductive part and a brush of the non-directional frequency generator are in contact, the spark which is caused at the beginnings of the brush-on/off periods, is also prevented.
摘要翻译：用于将直流电转换为交流电的非定向频率发生器包括与直流电源连接的直流输入端和与交流输出部分相连的交流输出端，以防止非方向频率发生器的火花。无方向频率发生器将从直流电源输入的直流电转换成交流电流，并将交流电输出到交流输出部。第一和第二开关部分与直流输入端和交流输出端连接，以分别控制非方向频率发生器的直流输入端和交流输出端的导通状态。第三开关部分与第一开关部并联连接，并且当第二开关部分接通并且第一开关部分断开时间歇地接通。第一和第二开关部分是继电器，而第三开关部分是集成栅极双极晶体管。当施加直流电时，微型计算机接通无方向频率发生器和第二开关部分，并且通过开关装置间歇地将直流施加到非方向性频率发生器直到第一开关部分接通。因此，非方向性频率发生器的输入侧和输出侧的阻抗之间的差异减小，并且防止了火花。此外，由于在非定向频率发生器的导电部分和电刷接触的刷毛期间间歇地施加直流电，所以在刷毛/断开时段开始时引起的火花，也被阻止。

23. 发明授权

US6166936A Non-directional frequency generator 失效
标题翻译：无方向频率发生器
公开(公告)号：US6166936A
公开(公告)日：2000-12-26
申请号：US502075
申请日：2000-02-10
申请人： Yong-woon Han , Seong-deog Jang , Kwang-seok Kang , Han-jun Sung
发明人： Yong-woon Han , Seong-deog Jang , Kwang-seok Kang , Han-jun Sung
IPC分类号： H02K15/02 , H02M7/60
CPC分类号： H02M7/60
摘要： A non-directional frequency generator capable of minimizing frictional noise generated due to a mechanical rotation mechanism, including: a plurality of brushes connected with a direct current power source; and a commutator which converts a direct current waveform inputted from one of the brushes into an alternating current waveform by a rotational movement thereof, having a groove formed on an outer circumference thereof slanted inward to the commutator so as to reduce friction with the brushes during the rotation thereof.
摘要翻译：一种能够使由于机械旋转机构产生的摩擦噪声最小化的非方向性频率发生器，包括：与直流电源连接的多个电刷; 以及换向器，其通过其旋转运动将从一个电刷输入的直流电波转换成交流波形，其具有形成在其外周上的槽向内倾斜到所述换向器，以便在所述电刷期间减小与所述电刷的摩擦旋转。

24. 发明授权

US5831253A Method of controlling a microwave oven having a vertically movable rotary tray and food weight sensor 失效
标题翻译：控制具有可垂直移动的转盘和食物重量传感器的微波炉的方法
公开(公告)号：US5831253A
公开(公告)日：1998-11-03
申请号：US804395
申请日：1997-02-21
申请人： Dae-Sung Han , Seok-Weon Hong , Kwang-Seok Kang
发明人： Dae-Sung Han , Seok-Weon Hong , Kwang-Seok Kang
IPC分类号： H05B6/78 , F24C7/02 , F24C15/16 , H05B6/64 , H05B6/80 , H05B11/00 , H05B6/68
CPC分类号： H05B6/6482 , H05B6/6411 , H05B6/6464
摘要： A microwave oven wherein at least a microwave cooking mode and an electric resistance heater cooking mode can be selected by a user. A tray for supporting foodstuff can be raised and lowered and rotated about a vertical axis. A weight measuring mechanism determines the weight of foodstuff on the tray. During a cooking sequence, an operator selects a cooking mode, and the weight of foodstuff is measured. A controller determines a desired cooking elevation as a function of the cooking mode and weight of the foodstuff. A rotation mechanism begins to rotate the tray, and then the rotating tray is raised to the desired elevation, whereupon a cooking operation is performed while the tray is rotated at the desired elevation. At the end of the cooking operation, the tray is lowered to its initial position while still being rotated.
摘要翻译：一种微波炉，其中至少可以由用户选择微波烹饪模式和电阻加热器烹饪模式。用于支撑食物的托盘可以升高和降低并围绕垂直轴线旋转。重量测量机构确定托盘上食物的重量。在烹饪顺序期间，操作者选择烹饪模式，并且测量食物的重量。控制器根据食物的烹饪模式和重量确定期望的烹饪高度。旋转机构开始旋转托盘，然后旋转托盘升高到所需的高度，然后在托盘以期望的高度旋转的同时进行烹饪操作。在烹饪操作结束时，托盘在仍然旋转的同时降低到其初始位置。

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