JPS5842758Y2 - Operation control device for combustion type hot air heater - Google Patents

Description

[Detailed description of the invention] This invention relates to an operation control device for a combustion type hot air heater, and its purpose is to reliably set the operating system or timer setting system with simple operation without fear of erroneous operation. In addition, even if the timer setting state is set after the operation mode has been established, the fuel supplied during the time when the operation mode is established can be automatically combusted. An object of the present invention is to provide an operation control device that can prevent abnormal combustion from occurring when the operation mode is established after a set time has elapsed.

Recently, a device of this kind has been proposed in which a timer is built in and the timer is set to a desired set time so that the heating operation can be started after the set time has elapsed.

However, in conventional devices, the operation switch operation body for switching to the running or stopping mode and the operation body for setting this timer are provided separately, so when setting the timer, the operation switch is also required. The operation is complicated and troublesome, and there is a high risk of erroneous operation, such as forgetting to operate the operation switch when setting the timer.

Furthermore, if the operation to switch the operation switch to the operation mode is performed before the operation to set this timer, the operation of the operation switch will open the solenoid valve in the fuel supply passage or energize the ignition heater. The solenoid valve is closed by operating a timer set,
Even if the power to the ignition heater is cut off, the fuel supplied while the timer setting is being performed will accumulate in the fuel tray of the combustor, and when operation is started after the set time has elapsed, A problem arises in that the fuel stored in the fuel tray burns abnormally.

This invention was devised to solve the above problems, and liquid fuel is transferred from the fuel tank to the combustor via an oil volume regulator, an auxiliary solenoid valve installed in the auxiliary fuel passage, and a main solenoid valve installed in the main fuel passage. The combustor is supplied with fuel to a receiving tray provided therein, and a igniter is installed inside the combustor, and a combustion fan equipped with a driving motor is attached, and an indoor fan and an indoor fan motor for driving the fan are attached. In the combustion hot air heater, the operation switch has a movable contact piece, a normal terminal, and an opening/closing terminal, and a movable contact piece, a normal terminal, and a first A cam for operating an opening/closing terminal, a second opening/closing terminal, and a timer switch having a timer motor is provided, and when these cams are set to a stop position, a circuit is opened between the normal terminal of the operation switch and the opening/closing terminal,
The circuit between the normal terminal and the second open/close terminal of the timer switch is closed.
When the operating body is rotated by a predetermined angle in one direction from the stop position to the operating position, the circuit between the normal terminal and the open/close terminal of the operation switch is closed, and the closed circuit between the timer switch, the normal terminal, and the second open/close terminal continues, When the operating body is further rotated from the operation position to the timer set position, the circuit between the normal terminal of the operation switch and the open/close terminal continues, the circuit between the normal terminal of the timer switch and the first open/close terminal is closed, and the operating body is stopped. When the switch is rotated in the other direction from the position to the timer set position, the circuit between the normal terminal and the open/close terminal of the operation switch is closed, and the circuit between the normal terminal and the first open/close terminal of the timer switch is closed between the stop position and the timer set position. The circuit is switched to a closed circuit and continues to be closed at the timer set position, while the normal terminal of the operation switch is connected to one of the connection lines to the power supply, and the first opening/closing terminal of the timer switch is connected to the power supply via the timer motor. At the same time, connect the open/close terminal of the operation switch to the normal terminal of the timer switch, and connect the normally closed terminal of the second relay and the series circuit of the ignition heater to the parallel circuit of the auxiliary solenoid valve and the first relay. The circuit is connected in parallel to the second opening/closing terminal of the timer switch and the other connection line, and the parallel circuit of the second relay and the indoor fan motor is connected in series with a thermostat that closes when the temperature rises in the combustor. Connect to the power supply, connect the normal terminal of the first switch of this second relay and the second opening/closing terminal of the timer switch, and
The second open/close terminal of the first switch of the relay is connected to the other connection line via the main solenoid valve, and the open/close terminal is connected to the other connection line via the drive motor, and the second switch of the second relay is connected to its normal terminal. is connected to one connection line and its first open/close terminal is connected to the normally open terminal of the operation switch, and the first open/close terminal of this second switch is connected to the normally open terminal of the first relay. A connecting wire with a contact, and a second
The simple operation of connecting the opening/closing terminals to the opening/closing terminals of the first switch of the second relay with connecting wires and operating the single operating body eliminates the risk of erroneous operation in the operating system or the evening timer setting system. When operating the operating body to set the timer while ensuring that the timer is set without any problem,
Even if you operate the system to set the timer after the operation mode has been set, the fuel supplied to the combustor will be automatically and completely burned during the operation mode, and the timer will operate and the set time will elapse. This was done to prevent abnormal combustion from occurring when heating operation started.

Hereinafter, an embodiment in which the device of the present invention is applied to a combustion type hot air heater shown in FIG. 5 will be described in detail based on the drawings.

First, the heater shown in Fig. 5 will be explained. 1 is a fuel tank storing liquid fuel such as kerosene, 2 is an oil amount regulator, 3 is a combustor with a tray 4 for supplying fuel at the bottom, and 5 is a fuel tank that stores liquid fuel such as kerosene. A combustion fan leads out a main fuel passage 6 and an auxiliary fuel passage 7 from the oil amount regulator 2 in parallel, and both passages 6 and 7 merge into one fuel supply pipe 8 to connect the supply pipe. 8
is opened above the saucer 4 of the combustor 3, and an ignition heater 9 is disposed near this opening.

The combustor 3 is provided with an exhaust port at the top and an air supply port at the bottom, and these exhaust ports and the air supply port constitute the combustion fan 5, including an exhaust fan 10 and an air supply fan 11.
The exhaust fan 10 and the air supply fan 11 each communicate with the air supply and exhaust pipe 12.

Further, 13 is an indoor circulation fan. And this heater
The fuel in the fuel tank 1 is supplied to the saucer 4 via the supply pipe 8, and the ignition heater 9 is energized to ignite the fuel supplied to the saucer 4, and the combustion fan 5 is operated to start combustion. The fuel is combusted by supplying and exhausting air to the container 3, and the indoor circulation fan 13 blows warm air into the room.

The device of the present invention is applied to the heater configured as described above, and its basic configuration is such that the operation switch SW1 and the timer switch SW2 can be operated by a single operating body 14, and the ignition heater 9 and the The first of the solenoid valve S■1 and the first relay MR1 interposed in the auxiliary fuel passage 7
a solenoid valve SV1 forming a parallel circuit 15, connecting the parallel circuit 15 to the operation switch SW1 via the timer switch SW2, and intervening in the main fuel passage 6; and a motor FM of the combustion fan 5. A second parallel circuit 16 is formed, and the second parallel circuit 16 is connected to the power source via the thermostats 1 to Th, which are closed due to a temperature rise in the combustor 3.
A relay MR2 is provided to connect the second parallel circuit 16 to the first parallel circuit 15 via the first switch MR2-1 of the second relay MR2, and connect the connection line from the operation switch SW1 to the second relay. MR2 second switch MR2-2
and is connected via the normally open contact 28 of the first relay MR1.

That is, the present invention, as shown in FIG.
The normal terminal 17 of W1 is connected to one connection line 18 to the power source, and the first opening/closing terminal 19 of the timer switch SW2 is connected to the other connecting line 20 to the power source, and the opening/closing terminal of the operation switch SW□ is connected. 21 is connected to the normal terminal 22 of the timer switch SW2.

Further, the first parallel circuit 15 is connected to the second opening/closing terminal 23 of the timer switch SW2, and the second parallel circuit 16 is connected to the first parallel circuit through the first switch MR2-1 of the second loop MR2. 15, and a connection line 18 connecting the second switch MR2-2 of the second relay MR2 to the power supply of the normal terminal 17 of the operation switch SW1.
to intervene.

The first switch of this second switch MR2-2. and the second opening/closing terminals 24 and 25 are connected to the motor FM of the combustion fan 5.
The connecting wire 50 to the first switch MR2-1 of the first switch MR2-1 is connected to the connecting wire 50 through the connecting wires 26 and 27, respectively, and among these connecting wires 26.27, the connecting wire 26 from the first opening/closing terminal 24
The normally open contact 28 of the first relay MR1 is interposed therein.

The operation switch SW1 shown in FIG. 1 is a single-pole, double-throw type like the timer switch SW2, and is equipped with a normal terminal 17, a first open/close terminal 21, and a second open/close terminal 29. The terminal 17 is connected to the second switch MR2-2.
and the second opening/closing terminal 29 of the operation switch SW1 is connected to the power supply side of the connecting position of the normal terminal of the second switch MR2-2 in the connection line 18, and the second opening/closing terminal 29 of the operation switch SW1 is connected to position and the second switch MR2-
The normally open terminal MR31 of the self-holding relay MR3 is connected between the normally open terminal MR3 of the second switch MR3-1 and the normally open terminal of the second switch MR2-2, and the connecting wire 20 The self-holding relay MR3 is connected between.

Then, a certain safety device S from the shock absorber LS and the overheat preventer FS is connected to the power source side of the connection line 18 from the connection position from the second opening/closing terminal 29 of the operation switch SW1, and A series circuit of the thermostat Th and a parallel circuit of the second loop MR2 and the motor FM2 of the indoor circulation fan 13 is connected between the power supply side position of the safety device S and the connection line 20.

As shown in FIGS. 2 and 3, the operation switch SW1 and the timer switch SW2 are housed in one casing 30.
It is built in and can be rotated clockwise or counterclockwise with a single operating body 14.
By the operation, each of the terminals can be switched as shown in the chart shown in FIG. 4, and the operation switch SW1 and timer switch SW2 can be set to one of three setting systems: stop, operation, and timer set. There is.

That is, a cam collar 33 and a gear collar 34 are inserted into and fixed to the shaft 14a of the operating body 14, and cams 35 and 36 are locked to both axial end surfaces of the cam collar 33.
Further, a main gear 37 is provided on the gear collar 34 and is pressed against the gear collar 34 by a friction spring 38.
7 is given a predetermined rotational resistance, and below this resistance,
It rotates together with the gear collar 34 and moves relative to the gear collar 34 in response to a rotational torque that exceeds the resistance as in the case where the operating body 14 is rotated.

Operating levers 39 and 40 are pivotally mounted on the radially outer sides of the cams 35 and 36, and a movable contact piece 43 is provided on the outer side of the levers 39 and 40 for switching the operation switch SW1 and the timer switch SW2. .44 and two fixed contact pieces 45, 46, 47, 48 are provided.

The movable contact pieces 43 and 44 correspond to the switches SW.

SW2 has a normal terminal 17.22, and one of the two fixed contact pieces 45.46 is connected to each switch SW1. First opening/closing terminal 21.19 in SW2
, and the other fixed contact pieces 47 and 48 are connected to the second opening/closing terminal 2
9.23, the movable contact piece 43.44 is actuated by the operation of the lever 39.40, and the normal terminal 17.22 shown in FIG. It is switched to terminal 21.19.

The cams 35 and 36 are both formed to have a short diameter from a reference point O to a point a in a counterclockwise direction as shown in FIG. On the other hand, the cam 36 becomes the major axis at the point beyond the set angle from the point a, and becomes the minor axis again at the point d, which slightly exceeds the point C, and reaches the reference point O. These cams 35 and 36 rotate in conjunction with the operating body 14 while maintaining the above-mentioned positional relationship between the longer diameter portion and the shorter diameter portion.

Further, the operating levers 39 and 40 have a protrusion 4 at the center thereof.
1 and 42, and when the longer diameter portions of the cams 35 and 36 come into contact with each other by rotation, the levers 39 and 40
move toward the movable contact pieces 43 and 44 of each of the switches SW and SW2, respectively, and when the short diameter portions touch the movable contact pieces 43 and 44, the movable contact pieces 4
3 and 44, the switches SW1 and SW2 operate so as to return in the direction away from the movable contact piece 43, 44, respectively.

That is, both the switches SW1 and SW2 are connected to the operating lever 3.
When the short diameter portions of the cams 35 and 36 are located on the protrusions 41 and 42 of 9 and 40, the normal terminal 17.22 and the opening/closing terminal 2
9.23 is in communication with the operating lever 39.
When the long diameter portions of the cams 35 and 36 are located on the protrusions 41 and 42 of the terminals 17 and 40, the movable contact pieces 43 and 44 are elastically deflected by the three operation levers and 40, and the contact pieces 43 and 44 are connected to the normal terminals 17 and 22. The opening/closing terminals 21.19 are brought into communication.

The main gear 37 also has two shafts 51. as shown in FIG.
A reduction gear 5 comprising a large number of gears 53 and 54 provided at 52.
The timer motor M is connected to the timer motor M through the terminal 0, and the timer motor M is interposed in the connection line connecting the first opening/closing terminal 19 of the timer switch SW2 to the connection line 20, as shown in FIG. When the timer motor M is rotated, the cam 35.3 is transmitted through the reducer 50 and the main gear 37.
6 is rotated at a predetermined rotational speed.

Each switch SW when the operating body 14 is set to stop, run, and set a timer.

SW2 normal terminal 17.21 and open/close terminal 29.19 or 2
1.23 will be explained using the time chart of FIG. 4. When the operating body 14 is rotated as shown in FIG. From the reference point O at 36 to point a or point d, the timer switch SW is
The normal terminal 22 and the second opening/closing terminal 23 of the switch SW1 are closed, but the normal terminals 17 and 21 of the operation switch SW1 are open, so the parallel circuit 15 is not energized and becomes a stop mode. It is.

That is, the operating body 14 is in a stopped state from point a to point d.

Then, the operating body 14 is rotated clockwise from this stop position, and the protrusions 41 and 42 are aligned with the points a of the cams 35 and 36.
When the temperature exceeds 1, only the operating lever 39 operates, and the normal terminal 17 of the operation switch SW1 is switched to the first opening/closing terminal 21.

At this time, the normal terminal 22 of the timer switch SW2 is connected to the second
The opening/closing terminal 23 is in communication with the opening/closing terminal 23, and this state continues until the protrusion 42 reaches the cam 36, thereby forming an operating system.

That is, the operating body 14 is in the operating position between point a and point a.

Next, when the operating body 14 is further rotated clockwise from this state, the protrusion 42 passes over the point of the cam 36, so that
The operation lever 40 operates and the timer switch SW2
The normal terminal 22 of is switched to the first open/close terminal 19.

At this time, the normal terminal 22 of the operation switch SW1 is connected to the first
Switched to opening/closing terminal 21. This state is as follows.
The protrusions 42 and 41 continue until they reach points c and d on the cams 35 and 36, forming a timer setting system.

That is, the operating body 14 is at the timer set position from when it is turned on until it reaches C in a clockwise direction.

When the operating body 14 is further rotated from this state, the protrusion 41 first moves beyond the point C of the cam 35 and closes the operation switch SW1.
The normal terminal 17 of the timer switch SW2 switches to the second opening/closing terminal 29 and becomes a stop state, and then the protrusion 42 crosses the point d of the cam 36 and the normal terminal 22 of the timer switch SW2 also becomes the second opening/closing terminal 2.
3, and the timer setting system is released.

When the operating body 14 is rotated counterclockwise, the cam 35.36 is rotated in order from the reference point O to the left side of the protrusion 41.42 through c, l), a, and then again to O. The system can be set in the order of stop mode, timer setting mode, and operation mode.

When the operation body 14 is rotated counterclockwise to change from the stop system to the operating system, compare the point d where the long diameter part of the cam 35 changes to the short diameter part with the corresponding point C of the cam 36 as described above. Since it is slightly deviated, the distance between the normal terminal 22 and the first opening/closing terminal 19 of the timer switch SW2 is between the stop position (point d) and the timer set position (point C).
), and then the operation switch SW is switched to closed circuit.
1, the normal terminal 17 and the open/close terminal 21 are closed for the first time when the timer set position (point C) is reached. The normal terminal 22 and the second opening/closing terminal 23 of the timer switch SW2 are opened beforehand, and the desired timer setting range can be reliably set through the operating system.

Further, in FIG. 1, the self-holding relay MR3 is connected in series with a diode D1 and a resistor R1, so that a DC type relay is used, and the switch SW1
is on the stop side, the normally open terminal MR3-1 is energized and the normally open terminal MR3-1
is now closed.

Therefore, when the circuit is connected to a power source, the normally open terminal MR3-1 is self-held by the relay MR3 and is always closed unless there is a power outage or the safety device S is activated.

When the operation switch SW1 is on the stop side, even if there is a power outage or the seismic protection device LS is activated, if the power outage or earthquake ends and the seismic protection device LS automatically returns, the relay MR3 will be energized and the relay MR3 will be normally open. Terminal MR3-1 will be closed again, but if there is a power outage or the safety device S is activated while the operation switch SW1 is on the operation side, even if the power outage ends or the safety device S automatically returns. The relay MR3 is not energized.

That is, the overheating preventer FS, which constitutes the safety device S, opens when the heater reaches a high temperature higher than the set temperature, such as when either the hot air outlet or the inlet (not shown) is blocked, or The anti-seismic devices LS open when an abnormality occurs, for example, when an earthquake with a seismic intensity of 4 or higher occurs, and when they become normal, they automatically return to the closed state. The normally open terminal MR of the self-holding relay MR3 is opened at the time of abnormality.
3-1 is opened, and even if the safety device S automatically returns to normal state thereafter, this open state is maintained.

Further, the motor FM2 of the indoor circulation fan 13 is connected to the motor FM2 of the indoor circulation fan 13.
It is connected in parallel with R2, and connected in series with the thermostat (Th) together with this relay MR2.

This thermostat (Th) can prevent the indoor circulation fan 13 from starting from the beginning of operation and blowing out cold air, which is a so-called cold draft. The indoor circulation fan 13 is turned at the same time as the solenoid valve SV2 is opened.

Further, a temperature fuse TFu is provided on the power supply side from the connection position of the indoor circulation fan 13 to the power supply of the motor FM2.
Varistor 1 is connected to the power supply side from the intervening position of the temperature fuse TFu, and when an abnormal voltage comes from the power supply, it short-circuits and absorbs the abnormal voltage, and operates to maintain the varistor V1 and later at a safe predetermined voltage. It is.

The ignition heater 9 connected to the first parallel circuit 15 is connected to the normally closed terminal MR2-3 of the relay MR2 via an ignition transformer Tr connected in series, and the operation switch SW1 is set to the operating state. At the same time as setting, electricity is applied and heated, and the fuel sucked up from above the saucer 4 through the plate core (not shown) is ignited, and the temperature of the combustor 3 rises due to sufficient ignition, and the thermostat) T
Activation of h causes the relay MR2 to cut off the current.

Further, the solenoid valve SV1 and the solenoid valve Sv2 connected to the first and second parallel circuits 15, 16 are operated by DC voltage, and both are connected to two diodes D3. D4 and D5. SV1. The DC voltage applied to SV2 is smoothed and stabilized.

The solenoid valve SV2 is connected to the first parallel circuit 15 via the first on-off switch MR2-1 of the relay MR2, and the indoor temperature controller TC is connected to the second on-off terminal 48 of the switch MR21. The indoor circulation fan 13 is connected in series with the solenoid valve SV2.
A relay MR4 is provided with a changeover switch MR4-1 for switching the motor FM2 between high speed and low speed.

That is, when the indoor temperature is below the set temperature, the temperature controller TC is kept closed, solenoid valve SV2 and relay MR4 are energized to supply fuel to combustor 3, and to operate indoor circulation fan 13 at high speed.

When the indoor temperature exceeds the set temperature, the temperature controller TC
opens, solenoid valve SV2 and relay MR4 are demagnetized, stopping fuel supply, and operating indoor circulation fan 13 at low speed.

Note that WS is a wind inspection switch, which is connected to the connection line 27.

However, if the thermostat Th does not operate at the beginning of operation, the first and second open/close switches MR2-19MR
Each normal terminal 2-2 is connected to the first opening/closing terminal 49.24 as shown in FIG. 1, and the combustion fan motor FM1 is energized and driven together with the ignition heater 9 and the solenoid valve Sv1.

Then, combustion starts due to the action of the ignition heater 9, and the combustor 3
When the temperature of
The normal terminals of R2-19MR2-2 are all connected to the second opening/closing terminals 48 and 25, the solenoid valve SV2 is opened, and the combustion fan motor FM1 is energized via the connection wire 27, and the drive is started. It will continue.

Also, during this operation, when the operation switch SW1 is operated to the stop side, the solenoid valve SV1. Sv2 are both closed, but the motor FM1 of the smoking fan continues to operate via the connection line 37 until the thermostat (Th) is opened, allowing post-purge to be performed.

In FIG. 1, D2 is a diamond, and R2 is a resistor, which are connected in series with the relay MR1 so that the relay MR1 can be used as a direct current relay like the relay MR3.

Further, C1 and C2 are capacitors, and the relay M
It forms a time delay in the operation of R3 and MR1, and is connected in parallel with each of the relays MR3 and MR.

The action of the capacitor C1 is such that during operation, for example, if there is a power outage or the outlet to the power supply is disconnected, the relay MR3 will not be energized unless the user operates the operation switch SW1, so even if the power outage ends, Although the combustion fan 5 will not be driven, if the user operates the operation switch SW1 to the stop side during a power outage, if the power outage ends early, the relay MR3 will be energized and the relay MR3 will be energized at the same time. Since MR2 is also energized, the relay MR3
If the operation of the second open/close switch MR2-2 is faster than the operation of the second open/close switch MR2-2, the combustion fan 5 will be driven even though the operation switch SW1 has been switched to the stop side, causing a sense of anxiety to the user. This capacitor C1 ensures that if the connection to the power source is cut off due to a power outage, only the combustion fan 5 will be driven even if the connection to the power source is restored. You can eliminate things.

Also, a capacitor C is connected in parallel to the relay MR1.
2, after operating the operation switch SW1 and setting it to the operation side, the relay M is activated by the closing operation of the thermostat) Th.
When R2 is excited, the second open/close switch MR2-2
It was created to compensate for the following problems that occur.

That is, this problem is that when the relay MR2 is energized, the movable contact piece of the second on-off switch MR2-2 of the relay MR2 changes from the communication state with the first on-off terminal 24 to the communication state with the second on-off terminal 25. The indirect piece to be transferred is the both terminals 2
4.25, the first parallel circuit 15
This means that there may be a situation where power is not supplied from the power supply.

However, this capacitor C2 has a charge voltage that causes the movable contact to have a short period of time, e.g., 0.0
The relay MR1 is reliably energized for a sufficiently longer period of time than 1 second, for example 0.1 second, and thus the normally open terminal 28 of the relay MR1 is reliably kept in the closed state, so that the movable contact piece can move as described above. The relay MR1 operates in such a way that the relay MR1 is reliably maintained in a self-holding state even after the above-mentioned operation is completed.

Further, V2 is a varistor provided in the parallel circuit 15, which connects both the electromagnetic valves Sv1. It operates to protect each device by absorbing the surge voltage generated when Sv2, relay MR4, etc. are activated.

Also PL1. PL2 is a pilot lamp, and Fu is a fuse.

In the above configuration, when the connection terminal to the power source is connected to the power source, the normally open terminal MR3-1 of the self-holding relay MR3 is closed and the self-holding state is established.

In this state, when the operation switch SW1 is operated to the operation side, the solenoid valve S1, the ignition heater 9, and the motor FM of the combustion fan 5 are energized, the auxiliary fuel passage 7 is opened, and fuel is supplied to the combustor 3. The fuel is ignited by the heat generated by the ignition heater 9 and combusted by the combustion fan 5 .

This combustion causes the temperature of combustor 3 to rise (thermostat).
When Th closes, the solenoid valve S2 opens and the motor FM2 of the indoor circulation fan 13 is driven.
Warm air is blown into the room and hot air heating is performed.
It will become.

That is, by closing the thermostat Th, the relay MR2
is excited and the first and second open/close switches MR2-1, MR
22 switches, solenoid valve SV2 opens and normally closed terminal MR2-
3 is opened, the ignition heater 9 is stopped, and at the same time, the motor FM2 of the indoor circulation fan 13 is also driven.

At this time, the combustion fan motor FM is energized via the connection line 27 to continue driving, and the first parallel circuit 15 is energized from the connection line 27 to the connection line 26. Ru.

As the above operation continues, the indoor temperature rises, and when it exceeds the set temperature, the indoor temperature controller TC closes, demagnetizes the solenoid valve Sv2, stops the fuel supply, and demagnetizes the relay MR4. This causes the motor FM2 of the indoor circulation fan 13 to rotate at a low speed, and the indoor temperature can be maintained at a predetermined temperature by opening and closing the indoor temperature controller TC.

To stop the heating operation, the operation switch SW1 is set to the stop side, and by doing so, the power supply to the parallel circuits 15 and 16 is stopped via the switch SW1, and the electromagnetic valves SV1. SV2 is closed, and after the post purge is performed as described above and the heater has sufficiently cooled down, the thermostat (Th) is opened to stop the combustion fan motor FM1 and the indoor circulation fan 13 motor FM2, and the residual fuel is removed. Heating operation can be stopped even when there is no electricity.

Further, when the operation body 14 is rotated to set the timer set area from the stop mode, the normal terminal 17 of the operation switch SW1 and the open/close terminal 21 are in communication, and the normal terminal 22 of the timer switch 23 and the first open/close terminal are connected. 19 to drive the timer motor M for a set time, and after the set time has elapsed, the normal terminal 22 of the timer switch 23 and the second opening/closing terminal 23 are brought into communication, and the operation according to the above-described operating system is started. is carried out.

When setting the timer set region by operating the operating body 14, when the direction of rotation of the operating body 14 is set counterclockwise to switch from the stop system to the timer set system, the relay Since the normally open terminal 28 of MR, maintains the open state, the terminals 1 and 2
Parallel circuits 15, 16 are not energized.

Then, when the set time has elapsed, the normal terminal 22 and the second open/close terminal 23 of the timer switch SW2 are closed, and the above-described state is changed from the stop system to the operating system. As a result, normal heating operation begins.

In addition, when setting the operating body 14 in the clockwise direction to change from the stop mode or the start mode in which the thermostat 1-Ta is open to the timer set mode, the timer set area is set. Even after setting the relay M
R1 is energized, the normally open terminal 28 of the relay is closed, and the first parallel circuit 15 as well as the motor FM1 are energized via the connecting wire 26.50, and the saucer 4 is energized during the period of operation. The supplied fuel is ignited by the ignition heater 9, resulting in a combustion state in which only the solenoid valve SV1 is opened.

However, when the thermostat (Th) is held closed due to this combustion heat, the relay.

Since MR2 is excited, the cable terminal of the second switch MR2-2 and the opening/closing terminal 25 of the relay MR2 are closed, while the cable terminal of the first switch MR2-1 and the opening/closing terminal 49 are in an open state. Become.

Therefore, the entire first parallel circuit 15 and the second parallel circuit 1
6 indoor temperature controller TC and solenoid valve Sv2, relay MR
4 is not energized, only the motor FM of the combustion fan 5 of the second parallel circuit 16 is energized, and the fuel on the saucer 4 can be completely combusted by the combustion fan 5. When the combustion is completed and the thermostat Th is opened, the power supply to the motor FM1 of the combustion fan 5 is stopped, and the motor FM can be reliably stopped and a normal timer setting system can be established. .

Furthermore, even when switching from an operating system in which the thermostat (Th) is closed to a timer set system, the first and second parallel circuits must be operated in parallel until the fuel remaining in the saucer 4 is completely combusted after switching to the timer set system. Of the circuits 15 and 16, only the motor FM is energized and is stopped only after the combustion is completed, thus providing a normal timer setting system.

Incidentally, when an abnormal situation occurs when heating operation is performed with the operation switch SW1 in the operating state, and the safety device S is activated, the normally open terminal MR3-1 of the self-holding relay MR3 is activated.
is opened, and even if the safety device S rotates back, this normally open terminal MR3-1 maintains the open state.

That is, in order to resume heating operation after the safety device S operates in an abnormal state, the user operates the operation switch SW1 once to the stop side after the safety device S automatically returns to the normal state, and then - again switches the heating operation to the operation side. Heating operation can be restarted only by forcing the operator to do so.

As described above, according to the present invention, liquid fuel is supplied from the fuel tank 1 through the oil amount regulator 2, the auxiliary solenoid valve SV1 provided in the auxiliary fuel passage 7, and the main solenoid valve S2 provided in the main fuel passage 6. The fuel is supplied to a receiving tray 4 provided in the combustor 3, and the combustor 3 is equipped with an ignition heater 9, a combustion fan 5 equipped with a drive motor FM1, and an indoor fan 13. In this combustion hot air heater equipped with an indoor fan motor FM2 that drives the fan 13, a movable contact piece 4 is attached to the shaft 14a of a single operating body 14 that is rotatable in both directions.
3. Operation switch S with cable terminal 17 and opening/closing terminal 21
W1, movable contact piece 44, cable terminal 22, first opening/closing terminal 19
, cams 35 and 36 are provided to operate the second opening/closing terminal 23 and the timer switch SW2 having the timer motor M, and these cams 35 and 36 are connected to the cable terminal 17 of the operation switch SW1 when the operating body 14 is at the stop position. When the circuit is opened between the and opening/closing terminal 21, the circuit is closed between the cable terminal 22 of the timer switch SW2 and the second opening/closing terminal 23, and the operating body 14 is rotated by a predetermined angle in one direction from the stop position to the operating position, the operation starts. Cable terminal 17 and opening/closing terminal 2 of switch SW1
1 is closed, the circuit between the cable terminal 22 of the timer switch SW2 and the second opening/closing terminal 23 continues to be closed, and when the operating body 14 is further rotated from the operating position to the timer set position, the cable terminal 17 of the operating switch SW1 is closed. The closed circuit between the and opening/closing terminal 21 continues, the circuit is closed between the cable terminal 22 of the timer switch SW2 and the first opening/closing terminal 19, and the operating body 14 is rotated from the stop position in the other direction to the timer upper position 11~. When the circuit is opened between the cable terminal 17 of the operation switch SW1 and the opening/closing terminal 21, the circuit is switched to a closed circuit between the cable terminal 22 of the timer switch SW2 and the first opening/closing terminal 19 between the stop position and the timer set position, and the circuit is switched to the timer set position. While connecting the cable terminal 17 of the operation switch SW1 to one connection line 18 to the power supply, and connecting the timer switch SW1 to one connection line 18 to the power supply,
The first opening/closing terminals 19 of 2 are connected to the other connection line 20 to the power supply via the timer motor M, and the opening/closing terminals 21 of the operation switch SW1 are connected to the timer switch SW1.
2, the normally closed terminal MR2-3 of the second relay MR2, the series circuit of the ignition heater 9, and the auxiliary solenoid valve S.
V1 and the parallel circuit of the first relay MR are connected in parallel to the second opening/closing terminal 23 of the timer switch SW2 and the other connection line 20, and the parallel circuit of the second relay MR2 and the indoor fan motor FM2 is connected. and a thermostat (Th) that closes due to temperature rise in the combustor 3 are connected in series and connected to a power supply, and the first switch MR of this second relay MR2 is
The normal terminal of 2-1 and the second opening/closing terminal 23 of the timer switch SW2 are connected, and the second opening/closing terminal 48 of the first switch MR2-1 of the second relay MR2 is also opened/closed via the main solenoid valve SV2. The terminals 49 are connected to the other connection wire 20 via the drive motor FM1, and are further connected to the second relay MR.
The second switch MR2-2 of No. 2 is connected to one connecting wire 18 by connecting its normal terminal to one of the connecting wires 18 and connecting its first opening/closing terminal 24 to the normal terminal 17 of the operation switch SW1. At the same time, this second switch MR2-2
The first opening/closing terminal 24 of the first relay MR1 is connected to the normally open contact 28 of the first relay MR1.
The first switch M of the second relay MR2 is connected to the first switch M of the second relay MR2 by a connecting wire 26 with a
Since it is connected to the opening/closing terminal 49 of R2-1, by rotating one operating body 14 and placing it in the stop position, operating position, and timer setting position, the heater can be stopped, operated, and set to timer cell l-, respectively. It is.

Furthermore, when setting the timer set position by operating the operating body 14, if the rotating operation direction of the operating body 14 is set to one direction and switching from the stop position to the timer set position, the relay MR, Since the normally open terminal 28 of the switch remains open, the solenoid valve S
V1. SV2, ignition heater 9 and combustion fan FM,
is not energized, and therefore no fuel is supplied to the saucer 4 at all.

In addition, when the rotation operation direction of the operating body 14 is set to the other direction to force the operation start position to be set from the stop position or the operation start position in a state where the thermostat (Th) is open, the timer is set to the timer set position. Even after setting to the set position, the relay MR1 is energized, and the normally open terminal 2 of the relay is energized.
8 is closed and the solenoid valve S■1. S.V.
2, the ignition heater 9 and the motor FM are energized, the fuel supplied to the saucer 4 is ignited by the ignition heater 9 during the time when the motor is in the operating position, and the solenoid valve SV is ignited.
If only 1 is opened, a strong combustion state will occur.

However, when the thermostat Th is held in the closed state by this combustion heat, the relay MR2 is energized, so that the normal terminal of the second switch MR2-2 and the open/close terminal 25 of the relay MR2 are closed. On the other hand, the normal terminal of the first switch MR2-1 and the open/close terminal 49 are in an open state.

Therefore, only the motor FM1 of the combustion fan 5 is energized, and the combustion fan 5 can combust the fuel on the saucer 4 throughout the chamber, and when the combustion is completed, the thermostat Th is opened. By operating, the power supply to the motor FM1 of the combustion fan 5 is stopped, the motor FM can be stopped reliably, and the timer can be set at the normal timer setting position.

In other words, the operation switch and timer switch can be moved to the operation position, timer set position, or
It is possible to set any of the stop positions reliably without the risk of erroneous operation, and by turning the operating body 14 in one direction, the setting from the stop position to the timer set position can be changed once to the operating position. Even if you set the setting after the set time has passed, the fuel supplied during the operating position and time can be automatically combusted, and abnormal combustion will not occur when the heater starts operating after the set time has elapsed. This can definitely be prevented from occurring.

Further, when the operating body 14 is turned in the other direction and set from the stop position to the timer set position, the timer set position can be set without supplying fuel to the saucer 4 of the combustor 3. Abnormal combustion does not occur when the heater starts operating.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an electric circuit diagram, FIGS. 2 and 3 are explanatory diagrams in which the operation switch and the timer switch are operated by a single operating body, and FIG. FIG. 4 is a time chart, and FIG. 5 is an explanatory diagram of the heater. 3... Combustor, 6... Main fuel passage, 7
...Auxiliary fuel passage, 9...Ignition heater, 14...Operation body, 15.16...Parallel circuit, 17...Normal Terminal, 18.20...
... Connection wire, 19... First opening/closing terminal, 21...
...Open/close terminal, 22...Normal terminal, 23...
...Second switching terminal, 24.25... Switching terminal, 26.27. 50... Connection line, SWl... Operation switch, SW2... Timer switch, SVl,
S■2...Solenoid valve, MR,...1st
'J relay MR, -1... Normally open terminal, MR2.
...Second relay, MR2,1...First switch, MR2-2...Second switch, Th.
...Thermostat, FMl...Combustion fan motor.

Claims (1)

[Scope of utility model registration request] From the fuel tank 1 to the oil amount regulator 2, the auxiliary solenoid valve SV1 provided in the auxiliary fuel passage 7, and the main solenoid valve S provided in the main fuel passage 6.
(2) A combustion fan 5 which supplies liquid fuel to a supply fuel receiving pan 4 provided in the combustor 3 via the combustor 2, and includes an ignition heater 9 inside the combustor 3 and a driving motor FM. In the combustion hot air heater, which is equipped with an indoor fan 13 and an indoor fan motor FM2 that drives the fan 13, a single operating body 14 rotatable in both directions is used.
The shaft 14a has an operation switch SW1 having a movable contact piece 43, a normal terminal 17, and an open/close terminal 21, a movable contact piece 44, a normal terminal 22, a first open/close terminal 19, a second open/close terminal 23, and a timer motor M. Cams 35 and 36 are respectively provided to operate the timer switch SW2.
, 36, when the operating body 14 is set to the stop position, a circuit is opened between the normal terminal 17 and the open/close terminal 21 of the operation switch SW1, and the normal terminal 22 and the second open/close terminal 23 of the timer switch SW2 are opened.
When the operating body 14 is rotated a predetermined angle in one direction from the stop position to the operating position, the operating switch SW1
When the circuit between the normal terminal 17 and the open/close terminal 21 of the timer switch SW2 is closed, the closed circuit between the normal terminal 22 of the timer switch SW2 and the second open/close terminal 23 continues, and the operating body 14 is further rotated from the operating position to the timer set position. The closed circuit between the normal terminal 17 and the open/close terminal 21 of the operation switch SW1 continues, the closed circuit between the normal terminal 22 of the timer switch SW2 and the first open/close terminal 19,
When the operating body 14 is rotated from the stop position in the other direction to the timer cell 1- position, a circuit is closed between the normal terminal 17 and the open/close terminal 21 of the operation switch SW1, and the timer switch SW
The circuit is formed between the normal terminal 22 of the switch SW1 and the first opening/closing terminal 19 so that the circuit is closed between the stop position and the timer set position, and the closed circuit is continued at the timer set position, while the normal terminal 17 of the operation switch SW1 is connected to the power supply and the first opening/closing terminal 19 of the timer switch SW2 to the other connecting line 20 to the power supply via the timer motor M, and the opening/closing terminal 21 of the operation switch SW1.
is connected to the normal terminal 22 of the timer switch SW, and the series circuit of the normally closed terminal MR2-3 of the second relay MR2 and the ignition heater 9 is connected in parallel with the parallel circuit of the auxiliary solenoid valve SV1 and the first relay MR1 to form a timer switch. Thermostats 1 to T that are connected to the second opening/closing terminal 23 of SW2 and the other connection line 20 and are closed by a temperature rise in the parallel circuit of the second relay MR2 and the indoor fan motor FM2 and the combustor 3;
h and connected in series to the power supply, and this second relay M
The normal terminal of the first switch MR2-1 of R2 and the second opening/closing terminal 23 of the timer switch SW2 are connected, and the second opening/closing terminal 48 of the first switch MR2-1 of the second relay MR2 is connected via the main solenoid valve Sv2. Then, the open/close terminals 49 are connected to the other connection wire 20 via the drive motor FM1, and the normal terminal of the second switch MR2-2 of the second relay MR2 is connected to the one connection wire 18. By connecting the first opening/closing terminal 24 to the normal terminal 17 of the operation switch SW1, one connection line 18 is interposed, and the first opening/closing terminal 24 of the second switch MR2-2 is connected to the normal terminal 17 of the operation switch SW1.
Connecting wire 26 with normally open contact 28 of relay MR1 and connecting wire 27 connecting second switching terminal 25 to switching terminal 49 of first switch MR2-1 of second relay MR2. This is a unique operation control device for combustion-type hot air heaters.