Control circuit of gas valve battery power supply and control method thereof

Abstract

The present invention discloses a control circuit of gas valve battery power supply. The control circuit comprises: a controller configured to determine whether an IO port charges an energy storage capacitor or not according to battery and capacitor charge boost digital quantities and configured to perform drive of a forced absorption valve; a current-limiting resistor configured to perform chargecurrent limiting by the IO port; a one-phase switch which is conducted when the forced absorption valve is opened, wherein an open valve circuit is supplied to the forced absorption valve by employing he battery power supply; the energy storage capacitor configured to perform charge under the control of a forced absorption valve controller and supply the open valve current to the forced absorption valve when the battery voltage is not enough and the forced absorption valve is opened; and a DC / DC power source configured to supply power to the controller. The present invention further disclosesa control method. The control circuit of the gas valve battery power supply and the control method thereof perform battery management to drive the forced absorption valve even though the internal resistance of the battery is large so as to allow the utilization rate of the battery to reach above 95%.

Description

technical field [0001] The invention belongs to the technical field of gas ignition control, and in particular relates to a control circuit and a control method for battery power supply of a gas valve. Background technique [0002] Gas stoves and gas water heaters need to add control valves to prevent gas leakage. In order to prevent the valve from being closed suddenly, the gas control valve must have the function of closing the valve when the power is turned off; When the appliance is powered by batteries, the maintenance current of the gas valve becomes the main consumption of the battery. Especially the large current required when the solenoid valve is opened makes the battery not durable. For this reason, many gas stoves use manual valve opening and thermocouple Supply power to the gas valve to prolong the service life of the battery. Using a thermocouple is insufficient in service life and response time. [0003] The battery-driven gas valve is used. The battery life ...

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Problems solved by technology

[0002] Gas stoves and gas water heaters need to add control valves to prevent gas leakage. In order to prevent the valve from being closed suddenly, the gas control valve must have the function of closing the valve when the power is turned off; When the appliance is powered by batteries, the maintenance current of the gas valve becomes the main consumption of the battery. Especially the large current required when the solenoid valve is opened makes the battery not durable. For this reason, many gas stoves use manual valve opening and thermocouple Supply power to the gas valve to prolong the service life of the battery. The use of thermocouples is insufficient in service life and response time

[0003] The battery-driven gas valve mode is used. The battery life is firstly the maintenance consumption of the valve, and the other main reason is that with the use of the battery, its internal resistance gradually increases, which is not enough to provide a large current when the valve is opened. Many batteries When there is still 30-50% of the capacity, the strong suction valve cannot be opened, which is the main reason for the short service life of the battery; users not only need to replace the battery frequently, but also cause a large waste of resources, especially the environment that waste batteries may cause. Pollution

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