Temperature detection device and barbecue device comprising the same

Abstract

The present invention discloses a temperature detection device and a barbecue device comprising the same. The temperature detection device comprises a temperature sensor; a first bleeder circuit, a first node being arranged between one end of the first bleeder circuit and the other end of the temperature sensor; a plurality of second bleeder circuits, first ends of the second bleeder circuits being connected to each other and then being connected with the first node, second ends of the second bleeder circuits being connected to each other and then being connect with a preset power supply; and a control unit, the sampling end of the control unit being connected with the first node, a plurality of control output ends of the control unit being correspondingly connected with the third ends of the second bleeder circuits, the control unit being configured to control the work of at least one second bleeder circuit in the plurality of second bleeder circuits when the control unit detects the temperature value detected by the temperature sensor is larger than a preset temperature value and the voltage value of the first node is smaller than a preset voltage value. The temperature detection device has high detection precision and wide temperature detection scope, and is able to accurately detect whether a temperature sensor has a short circuit or an open circuit or not.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to a temperature detection device and a barbecue appliance with the temperature detection device. Background technique [0002] In a barbecue appliance (such as an electric oven), in order to control the temperature of the oven cavity within a set range, it is necessary to detect the temperature of the oven cavity. [0003] Usually, the method for detecting the temperature of the furnace chamber is to connect the temperature sensor in series with a resistor of fixed resistance and then connect it in parallel with the power supply, and then connect the junction of the temperature sensor and the resistor to the input terminal of the control chip. When the temperature changes, the resistance value of the temperature sensor will change accordingly, and the junction voltage between the temperature sensor and the resistor will also change accordingly. Therefore, the control c...

AI Technical Summary

Problems solved by technology

However, the detection accuracy of this detection method is relatively low, and the temperature detection range is relatively narrow, and it is impossible to accurately detect whether the temperature sensor is open or short circuited.

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