Ignition circuit of a gas water heater
A gas water heater and ignition circuit technology, which is applied in the direction of combustion ignition, ignition by electric spark, combustion method, etc., can solve the problems of high component cost, poor ignition frequency stability, complex structure, etc., and achieve stable ignition frequency and good reliability , the effect of simple structure
Inactive Publication Date: 2017-04-12
SHENZHEN MEGMEET ELECTRICAL CO LTD
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Problems solved by technology
This circuit requires a high-frequency transformer, the structure is complex, the cost of components is high, and the stability of ignition frequency is poor
Method used
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Embodiment Construction
[0023] The principle of the ignition circuit of the gas water heater of embodiment 1 of the present invention forward conversion is as follows image 3 As shown, it includes a primary circuit, a secondary circuit and a transformer T1, and the primary circuit and the secondary circuit are coupled through the transformer T1.
[0024] The primary side circuit includes a DC input terminal, a switch tube Q3, a resistor R7, and the primary winding NP of the transformer T1. The first end of the primary winding NP of the transformer T1 is connected to the positive pole VIN of the DC input terminal, and the other end is connected to one end of the switch tube Q3. The other end of the tube Q3 is connected to the negative electrode (hot ground) of the DC input terminal through the resistor R7, and the control electrode of the switching tube Q3 is connected to the PWM control signal through the resistor R6.
[0025] Transformer T1 includes secondary windings NS1 and NS2, and the output te...
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The invention discloses an ignition circuit of a gas water heater. The ignition circuit comprises a primary side circuit, a secondary side circuit and a transformer, wherein the primary side circuit comprises a direct current input end, a switch tube and a primary side winding of the transformer; the switch tube and the primary side winding of the transformer are serially connected between the positive electrode and the negative electrode of the direct current input end; the secondary side circuit comprises a secondary side winding of the transformer, a silicon controlled rectifier, a first diode and an ignition transformer; the first end of the secondary side winding is connected with the cathode of the first diode; the anode of the first diode is connected with the first end of a primary side winding of the ignition transformer; the second end of the secondary side winding is connected with the first of an energy storage capacitor; the second end of the energy storage capacitor is connected with the second end of the primary side winding of the ignition transformer; the anode of the silicon controlled rectifier is connected with the first end of the energy storage capacitor; the cathode of the silicon controlled rectifier is connected with the first end of the primary side winding of the ignition transformer; a control electrode is connected with a first control signal input end. Compared with the conventional ignition circuit, the ignition circuit of the gas water heater, provided by the invention, has the advantages of simple structure, stable ignition frequency and relatively high reliability.
Description
[0001] [technical field] [0002] The invention relates to a gas water heater, in particular to an ignition circuit of a gas water heater. [0003] [Background technique] [0004] The principle of ignition circuit of traditional gas water heater is as follows: figure 1 As shown, based on self-excited oscillation circuit charging, thyristor triggers discharge and ignition. This circuit needs a high-frequency transformer, the structure is complicated, the component cost is high, and the ignition frequency stability is poor. [0005] [Content of the invention] [0006] The technical problem to be solved by the invention is to provide an ignition circuit for a gas water heater with simple structure, stable ignition frequency and good reliability. [0007] In order to solve the above technical problems, the technical solution adopted by the present invention is that an ignition circuit of a gas water heater includes a primary circuit, a secondary circuit and a transformer, the pr...
Claims
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IPC IPC(8): F23Q3/00
Inventor 冉洪江田健
Owner SHENZHEN MEGMEET ELECTRICAL CO LTD