JPS602824A - Warm air heater control device - Google Patents

Abstract

PURPOSE:To resume a normal combustion mode prior to the start of operation, by resetting a control section varying a combustion mode in response to the output of setting switch into a specific combustion mode by turning OFF a starting switch. CONSTITUTION:Upon a starting switch 1 being turned ON, a signal is inputted to a combustion control circuit to start a combustion. The output a1 of a Flip- Flop (FF) circuit 12 is then made as ''L'' and therefore a device is operated in a normal combustion mode. Upon a moderate operation switch 3 being depressed, a resultant signal passes through a chattering absorption circuit 10 to generate a specific pulse. In response, the output of FF circuit 12 is inverted into a ''H'' to establish a moderate operation. When the operation switch 1 is turned OFF under such a state, the ''L'' signal is inputted to the FF circuit 12 passing through a signal line (c) an the FF circuit 12 is resetted to generate the output of ''L''. The output of FF circuit 12 is maintained as ''L'' even when the operation switch 1 is turned ON again. The above operating procedure is the same as that of timed operation preset on a timer.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a control device for a hot air heater.

Configuration of conventional examples and their problems Conventional hot air heaters have a timer operation (operation that starts combustion after a certain period of time) and a modest operation (usually High←Lo).
w It is a two-stage combustion, but during moderate operation, Hi
There are some that have special combustion modes that are different from the normal combustion mode, such as an operation that changes the combustion state in three stages (gh - Low "OF", suppresses excessive heating, and reduces fuel consumption). If a lock type switch is used as a means to set this combustion mode, if the fire is extinguished in a specific mode, if the user turns on the operation switch without noticing because the specific mode switch is locked, the fire will start again. controlled by a specific mode set to
For example, in the case of timer operation, combustion will not start for a long time, and if left unnoticed at that time, combustion will start in the absence of the user, and various other problems may occur. In addition, it is necessary to confirm in which mode the vehicle was being driven before use, making it less convenient to use.

Purpose of the Invention The present invention was made in view of the above-mentioned problems, and its object is to ensure that the combustion mode is always in the normal combustion mode before the start of operation.

Structure of the Invention In order to achieve the above object, the present invention uses a non-lock type specific mode setting switch, inverts the output of a flip-flop (hereinafter abbreviated as F, , F are designed to be reset by turning off the operation switch.

DESCRIPTION OF EMBODIMENTS One embodiment will be described below with reference to FIGS. 1 to 3 and truth table 1. 1 to 3 show an example in which the present invention is applied to a hot air heater, and FIG. 1 shows the upper half of the exterior of the hot air heater. In the figure, when the operation switch 1 is pressed, operation starts and hot air is blown out from the air outlet 2. 3 is a modest operation switch, 4 is a timer operation switch, and these are displayed by mode display LEDs 5 to 7.

FIG. 2 is a block diagram showing the circuit configuration of the above embodiment. 3 is a modest operation switch, and 4 is a timer operation switch, each of which is pulled down via a resistor 8°9, and the signal line a0 that tells that the modest operation switch 3 is pressed and the timer operation switch 4 are pressed. A signal line that conveys information. are F and F according to truth table 1 in FIG. 3 through chattering absorption circuits 10 and 11, respectively.
F, input to circuit 12.13. EE circuit 12.1
The outputs of No. 3 are each input to a combustion control circuit 16 that controls the load m14 for performing combustion in the hot air heater. In addition, the operation switch 1 is pulled down by the resistor 16, and the signal line C that conveys the ○N10FF of the operation switch is F.
, F is connected to the reset input provided in circuit 12.13.

In the above configuration, when the operation switch 1 is turned on, a signal is input to the combustion control circuit 15 and combustion is performed. At this time, if the output a1 of F, F, and circuit 12 is L'', the motor is operated in the normal mode. Here, when the modest operation switch 3 is pressed, the signal passes through the chattering absorption circuit 10 and remains constant! It becomes 14 pulses, F,
The signal is input to the F circuit 12, and the output of the F and F circuits 12 is inverted and becomes H''.

In other words, a signal for sparing operation is input to the combustion control circuit 15, and the combustion control circuit 15 enters sparing operation.

When operation switch 1 is turned OFF in this state, the 'L' signal is input to F, F, and circuit 12 through signal line C, F, F, and circuit 12 are reset, and the output becomes L'''. . Then, even if you turn on the operation switch 1 again, F.
F, the output of circuit 12 remains at L 11.

The same applies to timer operation. That is,
When the operation switch 1 is ON, even if it is in the modest operation or timer operation mode, if the operation switch is turned OFF,
It is released and combustion always starts in normal combustion mode, which is safe.

Effects of the Invention As described above, according to the present invention, no matter what the set combustion mode is before the operation switch is turned off,
It is released at the same time as the operation switch is turned OFF, and when restarting, the combustion mode always starts from the normal combustion mode, which has the advantage of being safe and easy to use since there is no need to check the state of the mode before use.

[Brief explanation of the drawing]

Fig. 1 is an external view of a warm air heater according to an embodiment of the present invention, Fig. 2 is a block diagram showing the circuit configuration, and Fig. 3 is a block diagram showing the circuit configuration.
F is a truth table showing the circuit and its inputs and outputs. 1.--operation switch, 3.--moderate operation setting switch, 4.--.timer operation setting switch, 12.1
3...-7 lip 70 tube, 15...- combustion control circuit. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2 Figure 3 Figure 97-

Claims (1)

[Scope of Claims] 0) A lock-type operation switch, a setting switch for setting a specific mode, and a control unit that changes the combustion mode according to the output of the setting switch, and the control unit is configured to operate when the operation switch is turned OFF. A control device for a hot air heater, characterized by resetting a specific combustion mode. (2) The above control unit consists of a flip-flop circuit having an output caliber input and an output inversion input, and a control circuit whose combustion mode changes depending on the input signal, and the setting switch transmits a signal to the output inversion side input of the flip-flop circuit. 2. The control device for a warm air heater according to claim 1, wherein the operation switch transmits a signal to an output reset side input to reset the signal from the setting switch.