JPS5948457U - Ignition control device for hot air heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

FIG. 1 is an operation sequence diagram of an ignition control device for a hot-air heater according to an embodiment of the present invention, and FIGS. 2a and 2b are circuit diagrams showing the same implementation of the present invention. 1...Microcomputer, 3.33...Operation control unit (relay), 5,35...Load control unit (relay), 37.38...Power supply LED control unit, 40°41.
... Combustion LED control section, 43... Operation start signal generation section, A... Flame detection circuit, B... Temperature detection circuit, C...
・゛Power pulse generation circuit.

Claims (1)

[Scope of utility model registration request] The control circuit for the warm air heater includes a microcomputer 1, a flame detection circuit A, a temperature detection circuit B for the vaporizing section or burner section, a power pulse generation circuit C, an operation control section 3゜33, and a load control section 5.3.
5, power supply LED control section 37, 38, and combustion LED control section 4
0.41 and an operation start signal generation section 43, and the input/output relationship with the microcomputer 1 is a flame detection circuit A, a temperature detection circuit B of the vaporizing section or burner section, a power supply pulse generation circuit C, and an operation start signal generation section. section 43 as input, operation control section 3.33
, the load control section 5.35, the power supply LED control section 37.38, and the combustion LED control section 40, 41' as outputs, and the microcomputer 1 outputs the operation control section 3. 33 is turned on and the power supply LED control section 37 is turned on, and then the signal of the temperature detection circuit B output of the vaporizing section or burner section is discriminated, and after the signal changes from &&L99 to 4H9'', the first ignition is started. The load control units 5 and 35 are turned on LA for a certain period of time, and the time t
A. If the flame detection circuit input/output signal is "H" at the time of completion, normal combustion will be performed, but if it is "L", it will wait for re-ignition, and the load control section 5.35 will be turned off for a certain period of time tB, and the combustion LED will be turned off. The control unit 40 is turned on and off, and after the completion of the time period 1, the load control unit 5.35 is turned on again for a period of time tc as a second ignition, and if the input/output of the flame detection circuit is H when the time period tc is completed, it is normal combustion. However, when the input/output of the flame detection circuit is "L99" at the end of the time tc, or when the flame goes out during normal combustion, it is considered to be a misfire condition, and the operation control section 3.33 and load control section 5, 35 are turned off, and the power supply LED is turned off. Control unit 37
is turned off, the combustion LED control section is turned on and off, and during normal combustion, the operation control sections 3, 33 and load control sections 5, 35 are turned on, and the power supply LED control section 37 and the combustion LED are turned on.
The control unit 40 keeps the lights on, and the combustion LED control unit has a function of turning on the flame detection circuit if the input/output of the flame detection circuit reaches "°H" during the first ignition and the second ignition. , time LA, tB, and tc are determined by counting the output pulses of the power pulse generation circuit C.