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Electromagnetic valve open circuit detection circuit and method for kitchen range

A technology of open-circuit detection and solenoid valve, which is applied in the field of cookers, can solve the problems of poor versatility and increase the selection requirements of single-chip microcomputers, and achieve the effects of reducing workload and preventing damage to control system components

Pending Publication Date: 2022-04-19
VATTI CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used resistance sampling needs to consider that the voltage drop on the resistance exceeds the sampling range and sampling accuracy of the single-chip microcomputer, thereby increasing the selection requirements of the single-chip microcomputer, and the versatility is poor.

Method used

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  • Electromagnetic valve open circuit detection circuit and method for kitchen range
  • Electromagnetic valve open circuit detection circuit and method for kitchen range

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0021] A solenoid valve open circuit detection circuit for cooker, refer to figure 1 and figure 2 , including a single-chip microcomputer U1, a solenoid valve L1, a diode D1 and a transistor Q1, the pins of the single-chip microcomputer U1 are respectively connected to VABT, a diode D1 and a transistor Q1, the diode D1 is connected in series with the solenoid valve L1, and the solenoid valve L1 is connected to the transistor Q1 .

[0022] like figure 2 As shown, the relationship between the forward conduction voltage of a diode and the current flowing through it is: the greater the current flowing, the greater the forward conduction voltage VF, and at the same time, the higher the temperature T, the higher the forward conduction current under the same conduction current. The lower the pass voltage. In one embodiment...

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PUM

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Abstract

The electromagnetic valve open circuit detection circuit comprises a single chip microcomputer U1, an electromagnetic valve L1, a diode D1 and a triode Q1, pins of the single chip microcomputer U1 are connected with a VABT, the diode D1 and the triode Q1, the diode D1 is connected with the electromagnetic valve L1 in series, and the electromagnetic valve L1 is connected with the triode Q1. The open circuit of the electromagnetic valve is detected according to the change of the current of the electromagnetic valve to the break-over voltage of the diode connected in series with the electromagnetic valve, the damage of control system devices caused by reverse connection of positive and negative power supplies can be prevented, and the open circuit fault of the electromagnetic valve of the cooker can be timely and accurately found and prompted.

Description

technical field [0001] The invention relates to the related field of cooking appliances, in particular to a circuit and method for detecting open circuit of a solenoid valve used in cooking appliances. Background technique [0002] The cooker solenoid valve is used to control the opening of the gas, and is connected to the igniter circuit through the connection line. During the production and assembly process, the connection line needs to be sorted and fixed. During this process, the terminal is prone to loosening, and it needs to be timely in the back-end process Tips and discoveries so production runs smoothly. At present, the commonly used resistance sampling needs to consider that the voltage drop on the resistance exceeds the sampling range and sampling accuracy of the single-chip microcomputer, thereby increasing the selection requirements of the single-chip microcomputer, and the versatility is poor. Contents of the invention [0003] In order to overcome the disad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/54
CPCG01R31/54
Inventor 罗钊明潘叶江
Owner VATTI CORP LTD
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