Safety apparatus for output level-adjustable microwave oven
AssigneeSamsung Electronics Co., Ltd.
InventorSun-Ki Kim
Life of this patent
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Abstract
A safety apparatus for an output level-adjustable microwave oven includes a fuse disposed in a power supply line that connects a high power relay or a low power relay with a primary coil of a high voltage transformer of the microwave oven. Where a wrong operation occurs due to defects in the relays, such as a melting of any one of the relays, the fuse disposed in the power supply line connected to the primary coil of the high voltage transformer is cut off. Accordingly, a potential fire resulting from the wrong operation is prevented.
Claims20
A safety apparatus for an output level-adjustable microwave oven having a high voltage transformer and an output level which is adjustable by adjusting a winding ratio of the high voltage transformer, the safety apparatus comprising:
- relays which are connected to a primary coil of the high voltage transformer so as to allow the high voltage transformer to have different winding ratios corresponding to at least two output levels, wherein the relays include:
- a first relay which is connected to a center tap of the primary coil through a first power supply line so as to generate a high output of the output levels, and a second relay which is connected to a terminal of the primary coil through a second power supply line so as to generate a low output of the output levels;
- and
- a circuit breaker which cuts off an excessive current that flows through the first and second power supply lines where the relays are simultaneously operated.
A safety apparatus for an output level-adjustable microwave oven having a high voltage transformer and an output level which is adjustable by adjusting a winding ratio of the high voltage transformer, the safety apparatus comprising:
- relays which are connected to a primary coil of the high voltage transformer so as to allow the high voltage transformer to have different winding ratios corresponding to at least two output levels;
- and
- a circuit breaker which cuts off an excessive current that flows through power supply lines of the primary coil in response to the relays being simultaneously operated.
An output level adjustable microwave oven comprising:
- a cooking chamber to contain food;
- a magnetron which generates microwaves to cook the food;
- a high voltage transformer which generates a high voltage for the magnetron;
- a control unit which adjusts an output level of the microwave oven by adjusting a winding ratio of the high voltage transformer;
- relays which are connected to a primary coil of the high voltage transformer so as to allow the high voltage transformer to have different winding ratios corresponding to at least two output levels;
- and
- a safety apparatus which cuts off an excessive current that flows through power supply lines of the primary coil in response to the relays being simultaneously operated.
A safety apparatus for an output level-adjustable microwave oven having a high voltage transformer and relays which are connected to a primary coil of the high voltage transformer, the safety apparatus comprising a circuit breaker which is disposed in a power supply line that connects one of the relays with the primary coil.
Dependencies are inferred from the claim text.