JP3738524B2 - Combustion equipment control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device for a combustion device such as a gas fan heater for general household use.
[0002]
[Prior art]
Due to the improvement in usability in recent years, many commodities having a configuration in which the operation unit and display unit of the device are separated from the main control unit can be seen. The conventional configuration will be described below with reference to the drawings.
[0003]
In FIG. 3, the operation unit 1 has an operation switch 2 and a display unit 3, and is installed on the front upper portion of the device body 4 for ease of operation of the operation switch 2 and ease of viewing of the display unit 3. . An ON / OFF signal of the operation switch 2 is transmitted to the main control unit 6 inside the device by the connecting means 5.
[0004]
The microcomputer 7 of the main control unit 6 advances the operation mode sequence according to the signal of the operation switch 2 and rotates the motor 9 by the motor driving means 8.
[0005]
Further, the gas on-off valve 11 is opened by the gas valve driving means 10, and the gas adjusted by the flow rate adjusting driving means 12 and the flow rate valve 13 is supplied to a burner (not shown) in the combustion section 14, and the ignition driving means 15 ignites the igniter. It is ignited by the discharge from 16.
[0006]
The blower 17 is connected to the motor 9 and supplies warm air heated by the combustion unit 14 into the living room. Also, combustion air to the burner is supplied to the burner at the same time.
[0007]
The microcomputer 7 performs various displays on the display unit 3 by the connecting means 5 based on these control contents.
[0008]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, even if the connection means 5 is disconnected for some reason during the combustion or fails, the failure determination means does not exist and the combustion cannot be stopped, and even if the operation switch 2 is pressed, the microcomputer 7 There was a problem that the operation could not be stopped because the signal was not transmitted.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention returns a DC power source produced by the main control unit to the main control unit via the operation unit by the connecting means, and drives the microcomputer.
[0010]
According to the above invention, when the connection means for transmitting the operation switch on / off signal to the microcomputer of the main control unit is disconnected or fails for some reason, the power source driven by the microcomputer is stopped, and the operation of the device is also stopped. I can do it.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes a main power supply unit that takes in a household power supply, generates a DC power source for driving a microcomputer or a display unit by means of a transformer, a constant voltage circuit unit, an operation switch for the DC power source, and various display units. It has a connecting means for returning to the main control section via an operation section, and a control device using the returned DC power source as a driving power source for a microcomputer.
[0012]
If the connecting means is disconnected or breaks down, the driving power of the microcomputer is stopped, so that the connecting means can be monitored and the operation of the device can be stopped when the phenomenon occurs.
[0013]
Embodiment 1 of the present invention will be described below with reference to FIGS.
Example 1
FIG. 1 is an overall configuration diagram of a gas fan heater according to Embodiment 1 of the present invention. In the figure, the operation unit 20 includes an operation switch 21 and a display unit 22, and is installed on the upper front of the device main body 23. The on / off signal of the operation switch 21 is transmitted to the main control unit 25 inside the device by the connecting means 24. The microcomputer 26 of the main control unit 25 follows the operation sequence and rotates the motor 28 by the motor driving means 27.
[0014]
The gas opening / closing valve 30 is opened by the gas valve driving means 29 and the gas having passed through the flow valve 32 by the flow rate adjusting driving means 31 is adjusted to a gas amount corresponding to the combustion amount and supplied to the burner in the combustion section 33. The igniter driving means 34 discharges from the igniter 35, and the gas is ignited to start combustion.
[0015]
The blower 36 is connected to the motor 28 and supplies warm air heated by the combustion unit 33 into the living room.
[0016]
FIG. 2 is a partial detailed view of the gas fan heater according to the first embodiment of the present invention. In the figure, details of the operation unit 20 and the connection means 24 of the main control unit 25 are shown. Burner combustion air is also supplied.
[0017]
The device main body 23 takes in a household power supply (AC 100 V) into the main control unit 25, lowers the voltage with the transforming means 40, and creates a DC power supply 42 with direct current 5 V, 10 V, etc. with the constant voltage circuit means 41.
[0018]
The connecting means 24 is usually composed of a multi-core cord for an on / off signal of the operation switch 21 of the operation unit 20 and a signal of various display units 22.
[0019]
The DC power source 42 created by the main control unit 25 is returned to the main control unit again via the common operation unit 20 and becomes a driving power source for the microcomputer 26.
[0020]
When the connection means 24 is disconnected for some reason, the power supply of the microcomputer 26 of the main control unit 25 is disconnected and the device automatically stops.
[0021]
Note that when the connection means 24 is monitored by the DC power source 42 created by the main control unit 25, a reciprocation to the operation unit 20 and a two-core cord are required. If the household power supply (AC100V) is directly taken into the operation unit 20, the power supply is sent to the main control unit 25 by the connection means 24, and this power supply is monitored, the cord of the connection means 24 can be one core, but not much Since it is not general, explanation is omitted.
[0022]
【The invention's effect】
As is apparent from the above description, the following effects can be obtained by the control device for a combustion device of the present invention.
[0023]
The connection status between the operation unit and the main control unit is monitored, and in the unlikely event that an abnormality occurs in the connection status between them, the operation can be stopped automatically, even if the user presses the operation switch It is possible to eliminate the anxiety that existed so far, saying that it cannot be turned off.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a control device for a combustion device in Embodiment 1 of the present invention. FIG. 2 is a configuration diagram illustrating connection means of the device. FIG. 3 is an overall configuration diagram of a control device for a conventional combustion device. Explanation of symbols]
20 Operation part 21 Operation switch 22 Display part 24 Connection means 25 Main control part 26 Microcomputer 40 Transformer means 41 Constant voltage circuit means 42 DC power supply

Claims (1)

A main control unit that takes in a household power source and creates a DC power source by means of a transformer and a constant voltage circuit unit, a microcomputer disposed in the control unit, an operation unit having operation switches and various display units, and the DC power source Connected to the main control unit via the operation unit, and a control device for a combustion device using a DC power source returned from the operation unit as a power source of the microcomputer.

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