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Safety circuit and gas water heater

A safety circuit and resistance technology, applied in fluid heaters, lighting and heating equipment, valve details, etc., can solve the problem of triode output high level, controller pin state uncertain, gas solenoid valve switch state uncertain state And other issues

Pending Publication Date: 2019-10-08
深圳市享往科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The normal operation of the gas water heater needs to be combined with software control. However, in the actual application process, there are the following problems, that is, once the software fails, the state of the pin of the controller will be uncertain at this time. It is low level, which leads to the output of the triode being either low level or high level, that is, in an uncertain state, and finally makes the switching state of the gas solenoid valve in an uncertain state, which will bring certain safety hazards

Method used

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  • Safety circuit and gas water heater
  • Safety circuit and gas water heater
  • Safety circuit and gas water heater

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Please refer to figure 1 , this embodiment proposes a safety circuit 100, which can be applied to gas water heaters. By setting the safety circuit 100, it can effectively solve the problem of effectively ensuring the definite state of the gas solenoid valve drive and the solenoid valve when the software control logic of the water heater fails. The closed state of the water heater, etc., thereby improving the safety and reliability of the water heater. The safety circuit 100 will be described in detail below.

[0037] Such as figure 1 As shown, the safety circuit 100 includes a driving transistor Q1, a capacitor C1, a first resistor R1 and a second resistor R2, wherein the first end of the driving transistor Q1 is connected to one end of the capacitor C1, and the other end of the capacitor C1 is used as a signal input terminal for connecting to the controller. The second end of the driving transistor Q1 is connected to one end of the first resistor R1, and the other e...

Embodiment 2

[0058] Please refer to figure 1 , the present embodiment proposes a gas water heater, including a safety circuit, and the safety circuit is used to control the opening or closing state of the gas solenoid valve in the gas water heater. Wherein, the safety circuit may adopt the safety circuit 100 in the first embodiment above.

[0059] Exemplarily, the safety circuit 100 includes a driving transistor Q1, a capacitor C1, a first resistor R1 and a second resistor R2, the first end of the driving transistor Q1 is connected to one end of the capacitor C1, and the other end of the capacitor C1 It is used as a signal input terminal for connecting to the controller; the second end of the driving tube Q1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is used for connecting to a power supply, and the second end is used as a signal The output end is used to connect the solenoid valve driving unit; the third end of the driving tube Q1 is grounded...

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Abstract

The invention provides a safety circuit and a gas water heater. The safety circuit comprises a drive pipe, a capacitor, a first resistor, a second resistor and a third resistor, wherein the first endof the drive pipe is connected with one end of the capacitor; the other end of the capacitor is connected with one end of the third resistor; the other end of the third resistor is used as a signal input end for connecting with a controller; the second end of the drive pipe is connected with one end of the first resistor; the other end of the first resistor is used for connecting with a power supply; the second end is used as a signal output end for connecting with an electromagnetic valve drive unit; the third end of the drive pipe is grounded; and two ends of the second resistor are connected with the first end and the third end of the drive pipe. According to the technical scheme provided by the invention, when a software control logic of the water heater goes wrong, a certain state anda close state of the gas electromagnetic valve drive are ensured, so that the safety and the reliability of the gas water heater can be improved.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to a safety circuit and a gas water heater. Background technique [0002] The control circuit in the existing gas water heater mainly controls the solenoid valve drive unit of the gas water heater by directly controlling the conduction or closing of the triode through the pin of the controller, and then realizes the switching of the gas solenoid valve of the gas water heater. [0003] The normal operation of the gas water heater needs to be combined with software control. However, in the actual application process, there are following problems, that is, once the software fails, the state of the pin of the controller will be uncertain at this time. It is low level, which in turn causes the output of the triode to be either low level or high level, that is, in an uncertain state, and finally makes the switch state of the gas solenoid valve in an uncertain state, which will b...

Claims

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Application Information

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IPC IPC(8): F16K31/06F24H9/20
CPCF16K31/0675F24H9/2035
Inventor 杨杰
Owner 深圳市享往科技有限公司
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