JP2000310450A - Controller for heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the restarting of heating operation uncontrollably even when a stopping operation is made by a trembling finger tip in a controller adapted to indicate the start and stop of the heating operation with a single non-lock type switch. SOLUTION: A single non-lock type operation start indication switch/ operation stop indication switch 1 is operated to be turned ON, indicating the stopping of heating operation and then, the operation is released to turn OFF the operation start indication switch/operation stop indication switch 1. Until a specified time passes from the turning OFF of the switch, even when the operation start indication switch/operation stop indication switch 1 is operated by a trembling finger tip to be turned ON immediately, a central control circuit 11 fails to judge the ON action thereby preventing the restarting of heating operation against a user's will.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for controlling start and stop of a heater operation.

[0002]

2. Description of the Related Art Switches used for manually starting or stopping the operation of a heater include, for example, mechanically maintaining a pressed switch from an open (off) state to a closed (on) state. In addition to the lock type with a continuing mechanism, a closed (on) state is generated only when pressed,
There are non-locking types that return to the original open (off) state when it is released.

In general, when the operation of a heater is started by using a lock-type switch, the on-state of the switch is generated by pressing the switch, and then the on-state is continued even if the pressing is stopped, and the operation is continued. To stop, the same switch is pressed again to return from the on state to the off state.

On the other hand, when a non-locking type switch is used, one of the two switches is pressed to turn on to start the operation, and the other switch is similarly turned on to start the operation. Has been stopped. The method of using the non-locking type switch is not limited to this, and the first ON operation of only one switch is instructed to start the operation, and the operation is stopped by the next ON operation. Some have done it.

[0005]

However, among the above-mentioned lock-type switches, the switches themselves are expensive and difficult to miniaturize, and the failure of the lock mechanism is unavoidable. was there.

On the other hand, when two non-locking switches are used, the occupied area becomes large, and the operation position for instructing the operation and the operation position for instructing the same stop are increased. Since the operation positions are different, there is a high risk of making an operation error and there is a problem that the usability is poor.

On the other hand, when only one non-locking type switch is used, it is inexpensive and occupies a small area as compared with the above-described examples, but it is necessary to operate the switch a plurality of times when it is operated with a shaking fingertip. In some cases, the on operation has been performed over a long period of time, and the operation that should have been stopped has been restarted, and the reliability of the operation has not been sufficiently ensured.

[0008] In this regard, it is possible to reduce the erroneous operation by reducing the sensitivity of the switch operation or the like. The problem remained that it could not be maintained.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems and to realize a safe heater with an inexpensive configuration. In a control device having a central control circuit that controls the start and stop of the operation of the heater based on the operation of the instruction switch and operation stop instruction switch, the central control circuit issues a non-lock type operation start instruction during operation of the heater. When the ON operation of the switch / operation stop instruction switch is determined, the operation of the heater is first stopped, and then for a predetermined time from when the non-lock type operation start instruction switch / operation stop instruction switch is determined to be OFF operation, Control so that the ON operation of the non-locking type operation start instruction switch and operation stop instruction switch is not determined as an operation start instruction, so that unintended heating operation is not restarted. You configure the location.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is constructed as described above. During a heating operation of a heater, a single non-lock type operation start instruction switch and operation stop instruction switch are operated to operate the heater. When the stop is instructed, the central control circuit determines the ON operation of the non-lock type operation start instruction switch and operation stop instruction switch, and first stops the operation of the heater, and then the non-lock type operation start instruction switch. Even if the non-locking type operation start instruction switch and operation stop instruction switch are turned on again, for example, by a shivering fingertip, during the predetermined time from when the operation stop instruction switch is determined to be off, even if the non-lock type operation start instruction switch and operation stop instruction switch are turned on again for a predetermined period of time, Is not determined as the operation for starting the heating operation, and the unintended heating operation is not restarted.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are a block diagram and a control sequence diagram of a control device for controlling a liquid fuel combustion heater, respectively.
Is a single non-lock type operation start instruction switch / operation stop instruction switch for instructing the start and stop of the operation of the heater, 2 is a room temperature setting device for setting a target value of the heating temperature, and 3 is a heater for heating. A room temperature detecting device for detecting the temperature of the room, a flame detecting device for detecting the presence or absence of a combustion flame, and a vaporizer temperature detecting device for detecting the temperature of a vaporizer for vaporizing liquid fuel.

Reference numeral 6 denotes an electric heater for heating the carburetor, 7 a fuel pump for feeding fuel to the carburetor, and 8 a blower fan for blowing indoor air to a heat exchanger heated by a combustion flame.

Reference numeral 9 denotes an operation state display device of a display panel for visually displaying the operation state of the heater, and reference numeral 10 denotes a notification sound generation device for audibly notifying the operation state of the heater with a notification sound.

Reference numeral 11 denotes the signals of the above-described non-locking type operation start instruction / operation stop instruction switch 1, room temperature setting device 2, room temperature detection device 3, flame detection device 4, and vaporizer temperature detection device 5, It is a central control circuit that drives and controls the electric heater 6, the fuel pump 7, the blower fan 8, the operation state display device 9, and the notification sound generation device 10.

The embodiment of the present invention is configured as described above, and its operation will be described below.

Now, when the non-lock type operation start instruction switch / operation stop instruction switch 1 is pressed to stop the heating operation of the heater, as shown in FIG.
The central control circuit 11 determines that the non-lock type operation start instruction switch / operation stop instruction switch 1 is ON, and stops the driving of the electric heater 6, the fuel pump 7, and the blower fan 8 to stop the combustion operation. At the same time, the display of the operation state display device 9 is switched to the content to that effect.

Next, when the non-locking type operation start instruction switch / operation stop instruction switch 1 is released from being pressed and turned off, the central control circuit 11 determines that the switch is off, and a predetermined time (for example, It is also determined whether or not 1 second has elapsed, and the determination as to whether or not the non-locking type operation start instruction switch / operation stop instruction switch 1 is on is started only after the elapse of 1 second. Notification sound generator 1 over seconds
0, and that the ON information of the non-locking type operation start instruction switch / operation stop instruction switch 1 is not taken in during this time. When it is determined that the non-locking type operation start instruction switch / operation stop instruction switch 1 is ON after one second has elapsed, it is determined that the operation is not due to an abnormal operation, and the combustion heating operation is restarted. Then, the driving of the electric heater 6, the fuel pump 7, and the blower fan 8 is started.

Thus, even when the heating operation is stopped with the finger tip which shakes, or when the stop operation is performed in a hurry, the heating operation is not restarted indiscriminately.

[0020]

As described above, according to the present invention, when a single non-lock type operation start instruction switch / operation stop instruction switch is operated and the operation stop is instructed during the heating operation of the heater, the central control is performed. The circuit determined the ON operation of the non-lock type operation start instruction switch / operation stop instruction switch, first stopped the operation of the heater, and then determined the OFF operation of the non-lock type operation start instruction switch / operation stop instruction switch. Even if the non-locking type operation start instruction switch / operation stop instruction switch is operated with, for example, a shivering fingertip and turned on again for a predetermined time from that time, it is regarded as an operation for starting the heating operation. Since the determination is not performed, the heating operation against the intention is not restarted, and the heating operation control with high safety can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a control sequence according to an embodiment of the present invention.

[Explanation of symbols]

1: Non-lock type operation start instruction switch / operation stop instruction switch, 11: Central control circuit.

Claims (1)

[Claims] 1. A control device comprising a central control circuit for controlling the start and stop of operation of a heater based on the operation of a single non-locking type operation start instruction switch / operation stop instruction switch, wherein the central control circuit (11) When the ON operation of the non-lock type operation start instruction switch / operation stop instruction switch (1) is determined during operation of the heater, the operation of the heater is first stopped, and then the non-lock type The ON operation of the non-locking type operation start instruction switch / operation stop instruction switch (1) is determined as the operation start instruction for a predetermined time from when the OFF operation of the operation start instruction switch / operation stop instruction switch (1) is determined. A control device for a heater, wherein the control device does not perform heating.