JPS62288416A - Remote-operated combustion device - Google Patents

Abstract

PURPOSE:To enable a rational combustion start instruction and a stop instruction to be supplied by a method wherein when an off-mode instruction signal is detected, a combustion stop function is operated and when an on-mode instruction signal is detected, a combustion start function is operated. CONSTITUTION:When combustion is continued, a micro-computer 11 stored in a base unit 10 and a micro-computer 21 stored in a remote unit 20 are alternatively operated to send data signals. Instantaneous operation in which a momentary operation switch 27 is operated without moving a hand away from it, a signal expressing a logical '1' is got as a switch signal S1. When this is given to a mode specifying circuit 26, an off-mode instruction signal S3 is outputted and overlapped on a data transmission line 30 through a transmitter circuit 22. When a signal S3 is detected with a mode instruction signal sensing circuit 15 through a receiver circuit 13 of a base unit 10, a forced off-mode signal S5 is outputted after a desired time is elapsed from its input time, the micro-computer 11 may operate a termination of the operation, and after termination, its transmitting operation is stopped.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention <Industrial Application Field> The present invention provides a system for controlling the main body of combustion equipment such as gas boilers and oil boilers by means of an operating device installed at a location apart from the main body. This invention relates to improvements to remotely controlled combustion devices.

<Conventional technology> In recent years, in various types of combustion equipment, the equipment body (base unit) that directly controls the combustion part of a boiler, etc., is installed outdoors, and operation commands to the base unit are issued from an operation installed indoors. Remotely controlled combustion devices have been developed that allow combustion to be delivered from a remote unit.

In such a case, the base unit/) and remote unit must be connected via an electrical data signal line and a power line, but in order to prevent an increase in the number of crossover wiring lines, the data signal is superimposed on the power line. A two-wire system like this is currently considered the most rational.

A typical conventional example of such a two-wire remote-controlled combustion device is, for example, Conventional Example ■: Japanese Patent Laid-Open No. 57-120027;
This can be seen in "Wire type combustion control device" and "Remotely controlled combustion device" in the prior art example (1): Japanese Patent Application Laid-Open No. 80-228820.

On the other hand, however, when considering the basic operating function that the remote unit is required to have in such a remotely controlled combustion device, it is the command operation to start and stop combustion in the combustion section.

In other words, the user operates the operation switch to start combustion in the combustion section installed outdoors.

The ability to stop combustion in a burning combustion section is the minimum necessary basic operating function for this type of remotely controlled combustion device, regardless of manufacturer or model.

As will become clear from the purpose of the present invention, which will be described later, what we would like to focus on in this book regarding these conventional examples is what type of operation switch is used, how it is operated, and what kind of signal is sent to the combustion section. Questions include whether combustion commands and fire extinguishing commands are issued, and what is the safety level when the operation switch is turned on and when it is not.

However, although it has been recognized that the operation switch itself is fundamentally necessary as described above, no in-depth consideration has been given to the various points mentioned above.

For example, in the above-mentioned conventional example (2), a switch for simply opening and closing the power supply line is simply inserted, and this obviously must be an alternate type electric switch.

In other words, when the user attempts to start combustion of the equipment from the remote unit side, the switch is switched to the on position, and the switch contact constantly closes the power line, allowing the user to start combustion. Even after various electrical mechanisms occur and ignition occurs, combustion continues as long as the switch contact remains in the closed state.

Therefore, conversely, to extinguish a burning part,
By placing the operation switch in the stop position, the alternate switch contact changes from the previously open state to the open state,
On the other hand, in Conventional Example (2), it is not disclosed what type of operation switch is used.

As is well known, this type of electrical switch has several operating mechanisms:
There are two types; one is the above-mentioned alternate type, which toggles the contact position each time it is operated, and once the contact is placed in the closed position, the contact remains closed even after the operation is released. Similarly, if the switch is placed in the open position, the contact will remain open even if the user releases the switch, but the other one is only when the user is pressing the switch. This is called a momentary type, as the contacts are placed in a different state only when an artificial operating force is applied.

However, in Conventional Example ■, it seems as if either an alternative type or a momentary type operation switch can be used in principle, but as mentioned above, this Conventional Example ■ does not have practical advantages. , there is nothing disclosed about the operation switch, and if it is an alternate type that selectively keeps the power line closed or open, then the operation switch will be essentially the same as the conventional example (■). If a momentary operation switch is used, some kind of circuit system will be required to change the state of the system each time the switch is operated. However, even if one can imagine that it is necessary, the details are unclear as there is no specific disclosure.

<Problems to be Solved by the Invention> It has already been mentioned that in the conventional example ■, the operation switch is limited to the alternate type, but in the conventional example If a switch is to be used, the following drawbacks common to these conventional examples (1) and (3) will occur.

One of the demands from customers these days is the possibility of having multiple remote units. In other words, there is a desire to control the base unit from any of multiple remote units installed at multiple locations indoors.

However, if an alternate type operation switch is used, even if one remote unit wants to stop combustion in the combustion section via the base unit, the operation switch of the other remote unit will be in the closed state (combustion state). If it had been attached, that would be impossible. In order to stop combustion, the operation switches of all remote units must be turned off. This is actually an unrealistic requirement for users.

On the other hand, in a remote-controlled combustion device like the conventional example (■),
If it were possible to use a momentary type operation switch, it would be necessary to disclose the circuit such as how to determine whether combustion starts or stops by operating the momentary switch, but first. As mentioned above, there is no disclosure whatsoever regarding this, so we have to say that we are looking forward to future development.

Rather, considering the history of the development of this type of remotely controlled combustion device, it is more reasonable to assume that even in conventional example ①, an alternate type operation switch is used. .

The present invention has been made in view of these conventional circumstances, and first of all, the operation switch provided in the remote unit ( ) can be of a momentary type, and in such a case, 1. The aim is to provide a remotely controlled combustion device that can supply

Of course, the main purpose of using momentary switches is that when multiple remote units are used, each remote unit can control the base unit without being affected by other remote units. In particular, the purpose is to enable combustion start and stop control.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a remotely controlled combustion device having the following configuration.

A base unit that directly controls combustion equipment.

Two-wire data transmission that also serves as a power supply line between the remote unit that operates the base unit from a remote location: 'i t0
1J & -s: Ill t+ -j-e +tIdilr: n r;-:,"l m defeat r
A remote-controlled combustion device comprising a microcomputer built into each of the base unit and the remote unit for creating and transmitting and receiving data for the VM, wherein: when the remote unit is equipped and operated by the user; a momentary type operation switch that makes its output state different; and a mode signal output circuit that differentially indicates an on mode when the combustion equipment is in a combustion state and an off mode when it is in a body IF state. : If the above operation switch is operated while the above mode signal indicates the above off mode, an on mode instruction signal is issued, while if the above operation switch is operated while the above mode signal indicates the on mode. a mode specifying circuit for outputting an off mode instruction signal; When the off mode instruction signal is detected, a forced off mode signal is given to the microcomputer to activate the combustion stop function, while when the on mode instruction signal is detected, the microcomputer is reset and then the combustion stop function is activated. A remotely controlled combustion device comprising: a mode indication signal detection circuit for activating a start function;

<Operations and Effects> In the case of the remote-controlled combustion apparatus according to the configuration of the present invention, a mode signal representing the state of the combustion equipment is always outputted from the mode signal output circuit.

Although this mode signal may be taken out from a separately provided hardware circuit, it can also be taken out as a signal from the microcomputer.

Since the mode designation circuit receives such a mode signal, it can know whether the combustion equipment is currently burning or not. This mode designation circuit can be a hardware circuit provided separately from the microcomputer.

In this way, if the current state of the combustion equipment is input to the mode designation circuit, when operating the operation switch as a momentary switch, the momentary switch will output a signal of the same form every time it is operated. Even if a signal is output (for example, the signal line is closed only when the operation switch is operated), the mode designation circuit can easily determine which mode should be outputted each time the operation switch is operated. The circuit for realizing this is also extremely simple, although it is a matter of design by those skilled in the art.

For example, when the mode signal indicates off mode,
Since the combustion equipment is in a dormant state regarding combustion, if the operation switch is operated at this time, it is a command by the user to start the combustion equipment, and therefore the mode designation circuit is set to the ON mode. It is only necessary to output an instruction signal, and conversely, if the operation switch is operated while the mode signal indicates the on mode, it can be determined that the user has requested to stop the combustion equipment, and therefore the mode designation circuit is not activated. It is sufficient to output a mode instruction signal instructing the off mode.

These on mode instruction signals and off mode instruction signals are
They may be defined as signals of specific binary codes that can be distinguished from each other, but they can also be simply configured as signals with different pulse widths.

On the other hand, the base unit/ ) and remote unit are each equipped with a detection circuit that detects a mode instruction signal, so when an on mode instruction signal is detected, each corresponding microcomputer is reset, and then
A function for starting combustion can be activated, and when an off-mode instruction signal is detected, a function for stopping combustion can be activated by a forced off-mode signal.

In particular, as mentioned above, when the mode instruction signal is distinguished as an on mode instruction signal or an off mode instruction signal by having different pulse widths, this mode instruction signal detection circuit is applicable. be able to.

Due to this effect, even if a momentary switch is used as the operation switch, no matter how many remote units are added, problems like the conventional ones do not occur.
Commands to stop and start combustion can be given using only one remote unit.

For example, even if combustion is started by the operation switch of a remote unit, combustion can be stopped by operating the operation switch of that remote unit again, and combustion can also be stopped by operating the operation switch of another remote unit. In that case, there is no need to operate the remote unit that started the combustion.

As is clear from the above structure and operation, the momentary switch referred to in the present invention does not only refer to the structure of the switch itself as a mechanical component, but also has an output signal equivalent to that of such a momentary switch. For example, even if the structure is an alternate type as described in accordance with the conventional example, If you put it in one position, it will last for a set amount of time from that moment on.
It outputs an electrical signal in a different state than before, and when it is attached to the other position, it can output an electrical signal in a different state only for a predetermined time from that point. A switch circuit may be used, or a momentary type switch circuit may be provided, and a pair of units for commanding combustion start and stop may be provided independently.

Also, as mentioned above, the on mode and off mode can be specified.
The fact that this is done by a hardware circuit separate from the microcomputer can improve reliability compared to the case where only the microcomputer judges all signal systems.

One manifestation of this is, for example, that in the off mode, the microcomputer can be in a state where data transmission is reliably stopped on the data transmission line by the command of the forced off mode signal. The data that is normally transferred at this time is originally the ON mode instruction (No. 3 only) that is sent from the remote unit to start combustion; on the other hand, this ON mode instruction signal is detected. This is because the circuit may be a hardware circuit separate from the microcomputer.

Therefore, if the microcomputer is left unrelated to the data transmission line when combustion is stopped, even if some noise signal etc. is superimposed on this data transmission line when the combustion equipment is stopped, the microcomputer This prevents dangers such as accidentally starting combustion due to incorrect input into the computer.

Furthermore, according to the present invention, the on mode and off mode are completely distinguishable. Functional parts that control heating mechanisms such as motors can be easily turned on.

<Embodiment> FIG. 1 shows a schematic circuit diagram of a preferred embodiment of a remotely controlled combustion apparatus constructed according to the present invention.

First, for convenience, the circuits that are provided in the conventional system will be explained.
, 2+, transmitting circuit 12, 22, receiving circuit +3, 2
3. power supply circuits 14 and 24; the power supply circuit 14 of the base unit is connected to a commercial power supply 16;

Various data necessary for controlling the combustion equipment are transmitted from each microcomputer 11, 21 to each transmission circuit 1.
3 and 23, it is superimposed on a two-wire power supply and data transmission line 30 (hereinafter simply referred to as data transmission line 30) which also serves as a power supply line, and from the base unit is connected to the remote unit, and from the remote unit is connected to the base unit. The signals are respectively sent, decoded by the corresponding receiving circuits 23.13, and input into their own microcomputers 21.11.

Furthermore, each receiving circuit can also monitor the transmission data output from its own unit.

Normal combustion control is performed by such a circuit system, but since the present invention does not directly specify its internal aspect, a more detailed explanation will be omitted.

The configuration added to such a combustion apparatus according to the present invention is that the mode instruction signal detection circuit 1 is added to the base unit IO.
5, and the remote unit 20 includes a mode instruction signal detection circuit 25, a mode designation circuit 2G, and a switch 27 specified as a momentary type as an operation switch.
It is. However, as described in the section of the operation, the momentary type operation switch 27 may be one that corresponds to the momentary type in terms of price.

In other words, even if it has an operation knob that is structurally similar to an alternate type, when it is placed in one position, it outputs an electrical signal in a different state for a predetermined amount of time from that moment onwards. Similarly, even when it is attached to the other position, a switch circuit or the like may be used that can output a 1rL signal in a different state from that time only at a predetermined time from then on.

Therefore, in such a case, even though the shape is the same as a conventional alternate type switch, whereas in the past the combustion position and rest position were clearly separated,
There is no such fixed rule, and each time the existing position is moved from one position to another, combustion starts and stops alternately.

In addition, in the case shown in the figure, a plurality of remote units 20 are connected, but each can have the same configuration, so from the second remote unit 20-2 to the n-th remote unit 20-n Including omissions, only the internal circuit configuration of the remote unit 20 shown in white is shown surrounded by a frame of imaginary lines.

The operation of this embodiment will be described below in accordance with such a schematic circuit configuration, together with more specific examples of signal formats.

First, an operation switch 27 is provided in the remote unit 20 and is used by the user to command the combustion start and stop of the combustion equipment.
In this embodiment, it is a conventional mechanical momentary switch 27 in a narrow sense.

In such a case, the state will be different from the previous state only when the user is operating the switch by pushing the operation knob, etc., as shown in the first row of Figure 2. .

In the figure, the state indicated as "operated" corresponds to the logic "1" as the output state of the switch signal S1, and the output state indicated as "non-operated" corresponds to the logic "o". However, simply considering the circuit example shown in FIG. "Non-operation" corresponds to the case where the hands are cupped and opened.

On the other hand, the microcomputer 21 built into the remote unit 20 outputs a mode signal S2 representing the current state of the combustion equipment. What is mode signal S2?
The concept is a combination of the on mode signal 52on during combustion and the off mode signal 52off when at rest.
In reality, these can be expressed reciprocally using a binary relationship of signal levels.

In this embodiment, as shown in the second row of FIG. 2, when the combustion equipment is at rest, the off mode signal 52off of logic "0" or logic "L" is output from the microcomputer 21. During combustion, an on mode signal 52on of logic "1" or logic "H" is output.

Therefore, in this embodiment, the microcomputer 21 with a built-in remote unit serves as the mode signal output circuit in the summary structure.

The mode signal S2 is input to the mode designation circuit 26.

In the mode specifying circuit 2B, when the operation switch 27 is operated when the mode signal S2 is the off mode signal 52off, the on mode instruction signal 53on of the first pulse width T1 is turned on as shown in the second drawing. Occurred.

When the operation switch 27 is operated while the on mode signal 52an is input, an off mode instruction signal 53off of a second pulse @T2 shorter than the pulse width T1 is output, and these on mode instruction signals 53on and OFF are output. The mode instruction signal 53off is sent to the data transmission line 30 via the transmission circuit 22 built into each remote unit.

Base unit 10. The mode instruction signal detection circuits 15 and 25 built into each of the remote units 20 are reception circuits 13 and 23 that receive signals on the data transmission line 30.
The respective receiving signals S4 are received from the respective terminals. In Fig. 2, the received signal S4 related to the remote unit 20 and the received signal S4 related to the base unit 10 are both shown, but as indicated by the same reference numerals, they have the same waveform unless transfer distortion is considered. .

Such received signal S4 includes the above-mentioned on mode instruction signal '
No. 53on, off mode instruction signal S3o f f,
As before, various data signals Sd necessary for normal combustion control
The time required for transferring one packet of these data signals Sd is set at a certain design value of 3. The pulse It@T2 set for the above-mentioned off mode instruction signal S3or f is this - It is set longer than the packet transfer time T3, so the on mode instruction signal 53o
The pulse width T1 determined by n is set to be longer than these.

However, the mode instruction signal detection circuits 15 and 25 detect the normal data signal S included in the received signal S4.
When a signal that continues to be logic "1" for a time tl longer than one packet transfer time T3 of d is detected, a forced off mode signal S5 is output.

Therefore, in the case of this embodiment, the logic t+ 1 +
The signals that continue + are the off mode instruction signal 53off with a pulse width T2, and the on mode instruction signal 53off with a pulse width TI.
This corresponds to both "on" and "on". In other words, in this embodiment, the forced off mode signal S5 is once output even when the on mode instruction signal 53 is on, not when the off mode instruction signal 53 is off. However, it will be understood from what will be described later that this does not cause any problems. What I would like to confirm here is that in this embodiment, the pulse width T of the off mode instruction signal 53off, which has a relatively short pulse width, is
2 also means that the time t1 is set longer than the time t1, which is sufficient for determining that the mode instruction signal detection circuits 15 and 25 output the forced on mode signal s5.

The mode instruction signal detection circuit 15.25 further detects the pulse width T2 set in the off mode instruction signal 53off.
When a signal that continues to be logic "1" for a longer time t2, which is equal to or actually slightly shorter than the pulse width T1 set in the on mode instruction signal 53on, is detected, a reset signal s6 is output. In this embodiment, the input signal at this time cannot be any other than the on mode instruction signal 53on.

However, when the forced off mode signal S5 is output from the mode instruction signal detection circuit 15, the base 12 f day 0
After the built-in microcomputer 11 activates a function related to combustion stoppage, it enters a dormant state and desirably stops the transfer operation thereafter. Further, in this embodiment, the microcomputer 21 built into the remote unit also enters a hibernation state by the forced off mode signal S5 outputted from the mode instruction signal detection circuit 25 built into the remote unit, and stops the transfer operation.

However, in the essential configuration of the present invention, the only microcomputer in the base unit 10 that receives the action of the mode instruction signal detection circuit, including the reset operation described later, may be used.

On the other hand, when the reset signal S6 is issued from the mode instruction signal detection circuit 15.25, the base unit 10,
The microcomputers 11 and 21 built into the remote unit 20 are reset, start combustion starting at the falling edge of the reset signal, and operate the combustion continuation unit after ignition.

Because of these signal relationships, the operation of the device of this embodiment can be explained as follows over time.

First, for convenience, a case will be described in which a user performs an operation to stop combustion while the combustion equipment is in a burning state, as shown in the right half of FIG. 2.

When combustion continues, base unit unit 2
Data signals Sd are alternately transferred to and from the microcomputer 21 built in the microcomputer 21 of the microcomputer 21 built in the microcomputer 21. Particularly, when a plurality of remote units (n units) are provided, the microcomputer 11 built in the base unit IO generally performs data transfer while sequentially scanning each remote unit. However, such matters are not directly stipulated by the present invention.

While combustion is continuing, due to the previous time relationship agreement, the received signal S4 appearing at the output of each receiving circuit It,23 has the following:
- Since a signal that continues to be logical 1 is not generated beyond the packet transfer time T3, the mode indication signal detection circuit 15.25 naturally does not output any significant signal. In this state, the mode specifying circuit 26 continues to receive the logically significant on mode signal 52on.

Here, when the user operates the momentary operation switch 27 by pressing it, etc., only for the moment when the user does not release the hair, as shown in FIG. When this is given to the mode specifying circuit 26, the pulse width T2
An off mode instruction signal 53off is output, and this is superimposed on the data transmission line 30 via the transmission circuit 22.

With respect to the power supply potential applied to the data transmission line 30,
There are various known methods for superimposing this signal, but as with the normal data signal Sd,
A method of superimposing the oscillation frequency from an oscillation circuit with a predetermined frequency on the DC potential for a time corresponding to the pulse width of each signal (modulation method)
is the most common, simple and reliable, but there are also:
Another method is to disconnect the power line itself.

In either case, each unit has a built-in power supply circuit 14.
By incorporating a low-pass filter or an integrating circuit system into the signal component 18, ripples caused by such signal components can be removed.

However, when the off mode instruction signal 53off sent via the data transmission line 30 is detected by the mode instruction signal detection circuit 15 via the reception circuit 13 built into the base unit 10, time t1 has elapsed since the input. After that,
As shown in the right half of FIG. 2, a forced OFF mode signal S5 is output, and in response to this, the microcomputer 11 performs a combustion stop operation, and after the stop, preferably performs a transfer operation. will be suspended.

In the case of this embodiment, as a desirable consideration, a mode instruction signal detection circuit 25 is also provided within the remote unit 20, and on the other hand, the signal output from its own transmitting circuit 13 is also monitored by its own receiving circuit 23. Therefore, upon detection of the off-mode instruction signal 53off, its own microcomputer 21 is also put into a hibernation state.

When the combustion equipment is in a state where combustion is suspended in this way, as shown in the left half of FIG. The mode signal S2 becomes the off mode signal 52off and the mode specifying circuit 2
given to 6.

The next time the user momentarily operates the operation switch 27, this is a command to start combustion.

In such a case, by the switch signal Sl.

The mode designation circuit 2G outputs an on-mode designation signal 53on with a pulse width Tl, which is transmitted to the data transmission line 30 via the transmission circuit 23.

At this time, the microcomputer built into the base unit! As mentioned above, the microcomputer ti is in a dormant state regarding data transfer, but the mode instruction signal detection circuit 15 is built as a hardware circuit separate and independent from the microcomputer ti, and is always in the "alive state". Therefore, the mode instruction signal detection circuit 15 detects the on mode instruction signal 53an.

However, the above first and second pulse widths↑1. From the relationship of T2, when looking at the passage of time from the moment when the on mode instruction signal 53on is input, first, when time t1 has elapsed, the forced off mode signal S5' in the left half of FIG. 2 is output. It will be done.

However, in this state, the microcomputer 11 is originally in off mode, so even if some kind of response occurs due to the circuit's circumstances, the microcomputer 11 will not respond until 1:11 JIt2 has elapsed. As shown in the left half of Figure 2,
Since the reset signal S6 is immediately output, this forced off mode signal 85° is ignored as a result, and no problem occurs.

For this reason, in this embodiment, the simplest means of differentiating between the on and off mode instruction signals is the difference in pulse width.

When the mode instruction signal detection circuit 15 outputs the reset signal S8, the microcomputer 11 built in the base unit 10 is reset, and the falling edge of the reset signal S6 causes the microcomputer t
i starts, starts operations necessary to start combustion, and after combustion performs data transfer operations necessary to continue combustion.

On the other hand, in this embodiment, the mode instruction signal detection ports VJ', O are also transmitted through the receiving circuit 23 in the remote unit.
F+ A< + Soni-ni'W's 壬jf 9=
Q*nv+ 4 Mk! 4', +FI+ A foot pulse is generated and the microcomputer 21 is similarly reset.

The operation of the illustrated embodiment circuit has been explained above, but if necessary, the mode signal output circuit that outputs the mode signal S2 representing the current state of the combustion equipment can be operated by the microcomputer 21.
In such a case, it is possible to use any of various methods to detect whether the current mode is on or off; for example, by detecting one of the data signals Sd. This can be done by detecting whether there is a logic inversion within a packet, that is, within time 13.

Furthermore, instead of expressing the meaning of each signal mainly by the pulse width as shown in the figure, the meaning may be expressed by a specific frequency or specific logical value or logical data.

In particular, when the forced off mode signal S5 and the reset signal S6 are required to output a specific level continuously instead of being pulse-like, such as continuously outputting logic "L", Furthermore, when employing the discrimination method regarding the mode instruction signal S3 as in the illustrated embodiment, the forced off mode signal S5' at the point in time when it should originally be invalidated is
Although the reset signal S6 and the reset signal S6 may conflict with each other, this can be easily handled by using an exclusive OR circuit or the like and giving priority to the reset signal when the two overlap.

Similarly, for the configuration of the mode designation circuit 26 and the mode designation signal detection circuit 26 themselves, those skilled in the art can easily find any configuration that satisfies the operations described in -■-, both in terms of analog circuits and logic circuits. I can design things.

Furthermore, if one momentary switch is used to start combustion and one to stop combustion, the above operation will occur even if they are connected in parallel to @, but in that case, the user will accidentally press the stop switch. Even if you operate it, combustion will start if the equipment is in the combustion pause state at that time, and if you operate the combustion start switch during combustion, it will stop, so please be careful.
There is little point in using two momentary switches for starting and stopping in hopes of clear operation.

Therefore, in such a case, there is a logic that disables the operation of the combustion start switch when the on mode signal 52on appears, and conversely disables the combustion stop switch when the off mode signal S2o f f appears. The present invention can be effectively used by adding circuits and the like.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a preferred embodiment of a remotely controlled combustion device according to the present invention, and FIG. 2 is an explanatory diagram of the operation of the circuit device shown in FIG. 1. In the figure, 10 is a base unit), 11.21 is a microcomputer, 12 and 22 are transmitting circuits, 13 and 23
14 and 24 are power supply circuits; 15 and 25 are mode instruction signal detection circuits; 20 is a remote unit;
8 is a mode designation circuit, 27 is a momentary operation switch, and 30 is a two-wire power source/data transmission line.

Claims (1)

[Claims] A base unit that directly controls combustion equipment and a remote unit that operates the base unit from a remote location are connected by a two-wire data transmission line that also serves as a power supply line, and the data transmission A remotely controlled combustion device comprising a microcomputer built into each of the base unit and the remote unit for creating and transmitting/receiving data to be carried on the railway; a momentary type operation switch that makes its output state different only when the combustion equipment is in a combustion state; and a mode signal output circuit that differentially indicates an on mode when the combustion equipment is in a combustion state and an off mode when it is in a rest state. ; If the operation switch is operated while the mode signal indicates the OFF mode, an ON mode instruction signal is issued, while if the operation switch is operated while the mode signal indicates the ON mode. a mode specifying circuit that outputs an off mode instruction signal; and a mode specifying circuit that differentially detects the on mode instruction signal and the off mode instruction signal in the data signal applied via the data transmission line; When the off-mode instruction signal is detected, a forced off-mode signal is given to the microcomputer to activate the combustion stop function, while when the on-mode instruction signal is detected, the microcomputer is reset and the combustion stop function is activated. A remotely controlled combustion device comprising: a mode indication signal detection circuit for activating a start function;