Gas appliance and control method thereof
A control method and gas technology, applied in the direction of combustion method, burner, gas fuel burner, etc., can solve problems that affect the safety of gas appliances 1, unimaginable consequences, gas leakage, etc., to shorten the ignition time, early stop The effect of breaking gas and speeding up the ignition process
Active Publication Date: 2019-09-24
GRAND MATE
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Problems solved by technology
[0007] However, the detection voltage of the thermocouple 18 drops much faster than the detection voltage rises during heating. Therefore, after the flame is blown out, it often takes a long time (above 1 minute) to detect the voltage. Drop below the predetermined voltage value V, in other words, after the flame is blown out, it takes more than 1 minute for the solenoid valve to block the gas pipeline p
[0008] Just imagine, if the flame is turned off when the gas flow rate is large, a large amount of gas will leak from the burner 10 for more than 1 minute, which will affect the safety of the gas appliance 1. What's more, if there are extra sparks to ignite and leak gas, the consequences are even more unimaginable
Method used
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[0039] In order to illustrate the present invention more clearly, a preferred embodiment is given as an example and detailed description is as follows in conjunction with the accompanying drawings. Please refer to image 3 As shown, the gas appliance 2 of the first preferred embodiment of the present invention includes a burner 20, a gas valve 22, an igniter 24, a thermocouple 26 and a control device 28. The gas appliance in this embodiment is a gas Furnace, but not limited thereto, it can also be any gas heating device such as fireplace and water heater.
[0040] The burner 20 has at least one fire outlet for burning gas to generate flame. The gas valve 22 is disposed on a gas pipeline P communicating with the burner 20 . The gas valve 22 is controlled to open or block the gas pipeline P, and is controlled to adjust the gas flow output to the burner 20 . The igniter 24 is located next to the fire outlet of the burner 20 , and the igniter 24 is controlled to generate sparks...
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A gas appliance comprises a combustor, a gas valve, an igniter, a thermocouple and a control device. The control device is used for executing a control method, and the control method comprises the following steps that the igniter is controlled for ignition, and the gas valve is controlled to be started; the detection voltage output by the thermocouple is received; when the detection voltage is increased to the first voltage value, igniter ignition is stopped, and the gas valve is maintained to open a gas pipeline; the detection voltage output by the thermocouple is continuously received, and when the detection voltage originally higher than the second voltage value is reduced to be lower than the second voltage value, the gas valve is controlled to block the gas pipeline, and the second voltage value is higher than the first voltage value. Accordingly, the ignition process can be accelerated, and gas stop can be achieved in advance during flameout.
Description
technical field [0001] The invention relates to a gas appliance, in particular to a gas appliance using a thermocouple to detect flames. Background technique [0002] Gas appliances are most commonly used in heating devices. Compared with electric heating devices, the heat energy generated by burning gas is greater than that generated by using electricity, and the heating time and reaction time are faster than electric heating devices. [0003] Gas appliances of the prior art 1 such as figure 1 As shown, taking a gas stove as an example, it includes a burner 10 , a manual gas regulating valve assembly 12 , an igniter 14 , an ignition circuit 16 and a thermocouple 18 . The burner 10 is used to burn gas to generate flame. The manual gas regulating valve assembly 12 includes a valve body 122, a knob 124 and a switch 126. The valve body 122 is arranged on a gas pipeline p connected to the burner 10, and a solenoid valve (not shown in the figure) is arranged inside the valve bo...
Claims
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IPC IPC(8): F23D14/00F23D14/46F23Q3/00
CPCF23D14/00F23D14/46F23Q3/00
Inventor 黄重景黄锦颖黄信铭黄信雄叶严仁
Owner GRAND MATE