Abstract: Provided is a fire extinguisher which reduces a risk of a discharge accident caused when a stopper is unintentionally separated at a normal time and from which a handle is easily pulled out when fire occurs. According to the fire extinguisher, a force pressing an upper handle is not transmitted to a valve stem as a gap between the upper handle and a plug is maintained by a gap support part when the stopper is installed on the handle, and the force pressing an upper handle is transmitted to the valve stem through a valve pressing part as the gap support part horizontally moves by an elastic member so as not to overlap the plug when the stopper is separated from the handle.

Abstract: Provided is a fire extinguisher which reduces a risk of a discharge accident caused when a stopper is unintentionally separated at a normal time and from which a handle is easily pulled out when fire occurs. According to the fire extinguisher, a force pressing an upper handle is not transmitted to a valve stem as a gap between the upper handle and a plug is maintained by a gap support part when the stopper is installed on the handle, and the force pressing an upper handle is transmitted to the valve stem through a valve pressing part as the gap support part horizontally moves by an elastic member so as not to overlap the plug when the stopper is separated from the handle.

Abstract: Provided is a target speech signal extraction method for robust speech recognition including: receiving information on a direction of arrival of the target speech source with respect to the microphones; generating a nullformer by using the information on the direction of arrival of the target speech source to remove the target speech signal from the input signals and to estimate noise; setting a real output of the target speech source using an adaptive vector as a first channel and setting a dummy output by the nullformer as a remaining channel; setting a cost function for minimizing dependency between the real output of the target speech source and the dummy output using the nullformer by performing independent component analysis (ICA) or independent vector analysis (IVA); setting an auxiliary function to the cost function; and estimating the target speech signal by using the cost function and the auxiliary function.

Abstract: An electric cooker is configured to cook food in a pressurized state and a non-pressurized state of an inner pot, thereby improving the cooking quality and convenience of use. The electric cooker includes a main body having an inner pot configured to accommodate food and a heating unit; a lid coupled to an upper portion of the main body and opened/closed by an opening/closing unit; and a pressure switching selection unit arranged to pass through the lid and configured to switch or maintain opened/closed states to discharge internal steam from the inner pot by interworking with the opening/closing unit.

Abstract: To enable a user to cook both in a pressure state and in a non-pressure state inside the inner pot and thus improve cooking quality and ease of use, the present invention provides an electric cooker including a main body in which an inner pot for accommodating food is installed; a lid coupled to the main body to be opened or closed, in which a passthrough portion is formed; a pressure converter communicating with the passthrough portion, in which a selectively opened/closed state for discharging steam inside the inner pot is maintained; and a pressure-responsive actuators communicating with the passthrough portion and selectively opened/closed depending on a pressure level inside the inner pot in a pressure cooking mode.

Abstract: An electric cooker is configured to cook in a pressure state and a non-pressure state of an inner pot, thereby improving the cooking quality and convenience of use.

Abstract: Provided is a target speech signal extraction method for robust speech recognition including: receiving information on a direction of arrival of the target speech source with respect to the microphones; generating a nullformer by using the information on the direction of arrival of the target speech source to remove the target speech signal from the input signals and to estimate noise; setting a real output of the target speech source using an adaptive vector as a first channel and setting a dummy output by the nullformer as a remaining channel; setting a cost function for minimizing dependency between the real output of the target speech source and the dummy output using the nullformer by performing independent component analysis (ICA) or independent vector analysis (IVA); setting an auxiliary function to the cost function; and estimating the target speech signal by using the cost function and the auxiliary function.

Abstract: An electric cooker is configured to cook in a pressure state and a non-pressure state of an inner pot, thereby improving the cooking quality and convenience of use. The electric cooker includes a main body configured to accommodate an inner pot; a lid coupled to an upper portion of the main body and having a handle portion provided at one side of an upper portion of the lid to interwork with an inner pot locking unit configured to lock the inner pot; a pressure switching unit arranged to pass through the lid and configured to switch or maintain an opened or closed state to discharge internal steam from the inner pot according to a rotation of the handle portion; and a pressure-responsive operating unit which is selectively opened or closed according to a pressure inside the inner pot in a pressure cooking mode in which the pressure switching unit is closed.

Abstract: An electric cooker is configured to cook in a pressure state and a non-pressure state of an inner pot, thereby improving the cooking quality and convenience of use. The electric cooker includes a main body configured to accommodate an inner pot; a lid coupled to an upper portion of the main body and having a handle portion provided at one side of an upper portion of the lid to interwork with an inner pot locking unit configured to lock the inner pot; a pressure switching unit arranged to pass through the lid and configured to switch or maintain an opened or closed state to discharge internal steam from the inner pot according to a rotation of the handle portion; and a pressure-responsive operating unit which is selectively opened or closed according to a pressure inside the inner pot in a pressure cooking mode in which the pressure switching unit is closed.

Abstract: An electric cooker is configured to cook food in a pressurized state and a non-pressurized state of an inner pot, thereby improving the cooking quality and convenience of use. The electric cooker includes a main body having an inner pot configured to accommodate food and a heating unit; a lid coupled to an upper portion of the main body and opened/closed by an opening/closing unit; and a pressure switching selection unit arranged to pass through the lid and configured to switch or maintain opened/closed states to discharge internal steam from the inner pot by interworking with the opening/closing unit.

Abstract: An electric cooker is configured to cook in a pressure state and a non-pressure state of an inner pot, thereby improving the cooking quality and convenience of use.

Abstract: An electric cooker is configured to cook in a pressure state and a non-pressure state of an inner pot, thereby improving the cooking quality and convenience of use. The electric cooker includes a main body configured to accommodate an inner pot; a lid coupled to an upper portion of the main body and having a handle portion provided at one side of an upper portion of the lid to interwork with an inner pot locking unit configured to lock the inner pot; a pressure switching unit arranged to pass through the lid and configured to switch or maintain an opened or closed state to discharge internal steam from the inner pot according to a rotation of the handle portion; and a pressure-responsive operating unit which is selectively opened or closed according to a pressure inside the inner pot in a pressure cooking mode in which the pressure switching unit is closed.

Abstract: To enable a user to cook both in a pressure state and in a non-pressure state inside the inner pot and thus improve cooking quality and ease of use, the present invention provides an electric cooker including a main body in which an inner pot for accommodating food is installed; a lid coupled to the main body to be opened or closed, in which a passthrough portion is formed; a pressure converter communicating with the passthrough portion, in which a selectively opened/closed state for discharging steam inside the inner pot is maintained; and a pressure-responsive actuators communicating with the passthrough portion and selectively opened/closed depending on a pressure level inside the inner pot in a pressure cooking mode.

Abstract: A battery recharging circuit capable of operating stably against a variation of a supply voltage. The battery recharging circuit includes a voltage source; an AC-to-DC converter for converting an AC supply voltage from the voltage source into a DC supply voltage, to generate a charging voltage; a voltage sensor for comparing the charging voltage with a reference voltage to generate a voltage control signal when the charging voltage is equal to or higher than the reference voltage; a current sensor for comparing a charging current with a reference current to generate a current control signal when the charging current reaches the reference current; and controller including a switching element connected between the voltage source and the AC-to-DC converter, to connect and disconnect a power path between the voltage source and the AC-to-DC converter so as to maintain the constant charging voltage.