KR-102964616-B1 - Overcurrent and overvoltage circuitry for cooking appliances

KR102964616B1KR 102964616 B1KR102964616 B1KR 102964616B1KR-102964616-B1

Abstract

A cooking device with improved heating control and grinding efficiency is disclosed, which can protect the processor unit from overcurrent and overvoltage by using a zero-crossing detection unit and an independent power source, and also allows for easy replacement of the zero-crossing detection unit or the bias circuit unit. The cooking device with improved heating control and grinding efficiency comprises a container unit equipped with a cooking container and a grinding blade, a main body unit equipped with a power generator (M) that is detachably attached to the container unit and rotates the grinding blade with a preset rotational force, and a heating device (H) that heats the cooking container. The cooking device is configured to include a zero-crossing detection unit (50) installed in the main body unit and optimizing switching operations by detecting the phase of an alternating current voltage, and a processor unit (80) installed in the main body unit and connected via a wire connector so that the zero-crossing detection unit (50) can be easily replaced by manual operation by a user.

Inventors

김홍배

Assignees

(주)로닉

Dates

Publication Date: 20260513
Application Date: 20250409
Priority Date: 20220404

Claims (7)

A cooking device comprising a container portion equipped with a cooking container and a grinding blade, a main body portion detachably attached to the container portion and equipped with a power generator that rotates the grinding blade with a preset rotational force and a heating device that heats the cooking container, A first power supply unit (20) installed in the main body and converting an alternating current voltage supplied from the outside into a preset first direct current voltage value and outputting it; A second power supply unit (30) installed in the main body so as to be separated from the first power supply unit (20), and which converts the alternating current voltage into a second direct current voltage value that is relatively larger or smaller than the first direct current voltage value and outputs it; A zero-crossing detection unit (50) installed in the main body and detecting each zero-crossing point (0 crossing point) of the AC voltage and outputting a preset switching signal; A processor unit (80) installed in the main body and driven by a first DC voltage supplied from the first power supply unit (20), and outputting a control signal for controlling the cooking operation of the cooking device according to a user's cooking command or cooking setting through the operating unit (70), synchronized with the zero-crossing point provided by the zero-crossing detection unit (50); A second bias circuit (90) installed in the main body and selectively outputting a second bias voltage when satisfying a preset logic combination of the first DC voltage supplied from the first power supply (20) and the output voltage of the processor (80); An output unit (100) that outputs a control signal for controlling the operation of the heating device or the power generator, each installed in the main body and electrically connected to the interior of the main body according to a logic combination of preset output voltages of the second bias circuit unit (90) and the processor unit (80); A sensing unit (40) having at least one sensor installed in an optional combination on the container part or the main body part, and converting a sensing value detected by each sensor into a voltage signal and outputting it; A cooking device with improved heating control and grinding efficiency, characterized by being configured to include a first bias circuit unit (60) installed in the main body and outputting a first bias voltage to the processor unit (80) according to the voltage output from the sensing unit (40).
delete
delete
delete
delete
delete
In paragraph 1, The above output unit (100) is, First and second relay contacts (RY1, RY2) connected in series with each other and attenuating a voltage waveform applied according to the control of the processor unit (80) into a preset half-wave voltage and outputting it; A cooking device with improved heating control and grinding efficiency, characterized by comprising a diode (D5) connected in parallel to the second relay contact (RY2) and outputting half-wave rectified outputs of the first and second relay contacts (RY1, RY2).

Description

Cooking appliances with improved heating control and grinding efficiency {Overcurrent and overvoltage circuitry for cooking appliances} The present invention relates to a cooking device with improved heating control and grinding efficiency, and more specifically, to provide a cooking device with improved heating control and grinding efficiency that can protect the processor unit from overcurrent and overvoltage by using a zero-crossing detection unit and an independent power source, as well as easily replace the zero-crossing detection unit or the bias circuit unit. Various types of detection units can be applied to cookers for automatically cooking tofu or soy milk. For example, an overflow prevention unit can be installed in the automatic cooker to prevent water from overflowing during the cooking process and to detect the water level inside the cooker. Additionally, a water-free detection unit can be installed to prevent the heater from operating and the automatic cooker from overheating when there is no water. As such, various types of detection units can be placed in the automatic cooker, and appropriate circuits for the operation of such detection units can be installed. However, if excessive voltage or current is introduced, the detection unit or the circuit contained within the detection unit itself may be damaged. Therefore, protective measures for the detection unit are required. Patent Publication No. 특1996-0006694 describes an inverter that heats a load by applying a high-frequency current to a working coil by alternately switching a switch element when a DC voltage is input through a filtering means and a rectification/smoothing means, an inverter driving means that controls the switch element of the inverter, and an input current sensing means that detects the amount of current input to the inverter. A protection circuit for an induction heating cooker is disclosed, comprising: a microcomputer for outputting a signal for heating a load and detecting the presence or absence of a load; a separation means for disconnecting the power supply of the signal output from the microcomputer; a current setting means for changing a current level signal for a signal separated and input through the separation means; a normal load determination means for determining whether it is a normal load by comparing an input current monitoring signal with a set current level; a start/stop means for controlling the operation of a voltage control oscillation means that controls an inverter driving means according to the output of the separation means; and a current feedback means for supplying a control voltage to the voltage control oscillation means according to the output of the start/stop means. Patent Registration No. 10-1591680 relates to a protection module for a detection unit that protects the detection unit by means of a separation switch and an independent power source, and to an automatic cooker with improved insulation properties by means of the same. The protection module (10) includes a detection sensor (12) for detecting the operating conditions of an output unit (H); a first detection processor (14) for receiving a signal from the detection sensor (12); a separation switch (15) for receiving a control signal output from the first detection processor (14); and a second detection processor (16) for receiving a signal transmitted from the separation switch (15) and controlling the operation of the output unit, wherein the separation switch (15) consists of a spatially separated transmitting terminal and a receiving terminal, and the first detection processor (14) and the second detection processor (16) are operated by independent power sources. Meanwhile, Utility Model Registration No. 20-0327502 discloses a foam detection and blocking device for a soy milk maker, which grinds soybeans to make soybean pulp, separates the pulp and soybean juice, and heats the soybean juice to produce soy milk, wherein a rod-shaped sensor is provided on the inner side of a container cover that covers the heating container of the soy milk maker to detect the level of foam generated, and simultaneously controls a heating plate that heats the soybean juice according to the detected signal so that the foam is removed. In addition, Patent Publication No. 10-2009-0116074 discloses a protection circuit for an induction heating cooker, comprising: a node in which three or more limiting voltages having different magnitudes are measured as a reference voltage to determine whether there is an overload of the resonant current supplied to the working coil in a protection circuit for preventing overload caused by eccentricity of the container in an induction heating cooker; a starting limiting unit and an intermediate output limiting unit connected to the node to output the levels of the limiting voltages differently depending on whether there is a short circuit; and a comparison unit for comparing the limiting voltage measured at the node