JPS5941390Y2 - Operating device for ignition etc. in dryer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating device for ignition, etc. in a dryer that can easily and reliably ignite the burner, set the temperature after ignition, and extinguish the fire.3 Conventionally, in grain dryers, A burner is provided to generate hot air for drying, and the control section of the dryer is provided with an ignition switch for the burner and a temperature setting device for an automatic temperature control device.

By the way, when starting the dryer, the ignition switch must be operated to ignite the burner, and the temperature after ignition must be set using the temperature setting device, so the operation at that time is complicated. This can easily lead to incorrect operation.

In view of the above, the present invention is an operating device for ignition, etc. in a dryer that allows a series of operations for igniting the burner, setting the temperature after ignition, and extinguishing the fire to be performed simply and reliably using only a variable resistor for temperature setting. The configuration of the present invention will be described below with reference to a preferred embodiment shown in the drawings.

In FIG. 1, 1 is a grain dryer, 2 is a hot air generator equipped with a burner, and 3 is a control section.

As shown in detail in FIG. 2, the control unit 3 includes a start button 4, a stop button 5, a reset button 6, a drying time setting timer 1, a temperature setting device 8 that also serves as an ignition and extinguishing knob, a power lamp 9, and a reset button. lamp 10
are provided for each.

The temperature setting device 8 is mainly composed of a temperature setting variable resistor 12 connected to an automatic temperature control circuit 11 of the burner shown in FIG.

As shown in FIGS. 4 and 5, the configuration is as shown in FIGS.
A rotating disk 14 with a T attached thereto is directly connected thereto, along the rotation locus of the cam 1T and at the rotation start position of the slider of the variable resistor 12, a fire extinguishing micro switch 15 and an ignition micro switch 15 in the direction of its rotational force are connected. The fire extinguishing micro switch 15 and the ignition micro switch 16 are interlocked with the slider rotating shaft 13 via a cam 17. has an opening contact, and the fire extinguishing microswitch 16 has a closing contact.

Recesses 17a and 17b are formed on the outer periphery of the rotating disk 14, which is integrally attached to the slider rotating shaft 13.

A ball 18 is pressed against the outer periphery of the rotating disk 14.

At the rotation start end of the slider and at the position where the cam 17 operates based on the fire extinguishing microswitch 15 and the ignition microswitch 16, the ball 18 indents into the recess 1γa and rotates the slider rotating shaft 130 times. At the position where the cam 11 only operates the microswitch 16, the ball 18 is recessed into the notch 17b and rotation is stopped at that position.

On the surface of the temperature setting device 80, a ball 18 is inserted into the concave notch 17a of the rotary disk 14, and the ball 18 is placed at the indicated position of the knob 8a.
``Extinguishing'' and ``Extinguishing'' are respectively displayed at the designated position where the ball 18 is recessed into the concave notch 17b, and furthermore, the temperature is displayed from that position to the end of rotation.

As shown in FIG. 3, a pump 19 and a heat sensitive element 20 are connected to the automatic temperature control circuit 11.

The pump 19 is controlled so that the burner maintains the temperature set by the temperature setting variable resistor 12, and the amount of fuel supplied to the burner is automatically controlled.

Further, 21 is an ignition circuit of the burner, and the ignition circuit 21
An ignition element 22 such as a heater or an igniter is connected to.

The fire extinguishing microswitch 15 is interposed in series between the power supply 23 and the automatic temperature control circuit 11, and the ignition microswitch 16 is connected from the ignition circuit 21 and the power supply 23 through the fire extinguishing microswitch 15. are interposed in series.

Next, the operation of the present invention will be explained.

Now, when starting the dryer and extinguishing the burner, operate the knob 8a of the temperature setting device 8 and move the slider rotating shaft 13 of the temperature setting variable resistor 12 from the "extinguish" position to the "ignition" position. ” position.

In this way, the fire extinguishing microswitch 15 is deactivated by contact with the cam 17, and the ignition microswitch 16 is activated, so the fire extinguishing microswitch 15 is closed and the ignition is turned off. The automatic temperature control circuit 11 and the ignition circuit 21 are connected to the power supply 23, so the burner is ignited and the pump 19 is activated to supply fuel. state.

Therefore, if ignition is confirmed in the burner, turn the knob 8a of the temperature setting device 8 to the temperature setting position and set it on the required temperature scale, and the burner will automatically maintain the temperature at the set temperature. Control is exercised.

In this state, the fire extinguishing microswitch 15 has already come out of contact with the cam 17 and is in the "closed" state, and the ignition microswitch 16 is also "open" in the released state, as described above. Therefore, the automatic temperature control circuit 11 is kept energized and the ignition circuit 21 is
The power is cut off and the combustion state is maintained.

To extinguish a fire, quickly return the knob 8a of the temperature setting device 8 to the "extinguish" position, and the fire extinguishing micro switch 1
5 and the ignition microswitch 16 are both activated by contact with the cam 17, and the fire extinguishing microswitch 15 is "open", so the ignition microswitch 16 is activated.
Even if the burner is "closed", power is cut off to the automatic temperature control circuit 11 and the ignition circuit 21, and the burner is extinguished.

The above-mentioned ignition of the burner, temperature setting after ignition, and extinguishing are all performed by a series of operations using only the knob 8a of the temperature setting device 8, so these operations can be performed easily and reliably, and there is no risk of erroneous operation. There is no danger.

In short, the present invention provides a fire extinguishing microcontroller which has an opening operation connection interlocked with the rotary shaft 13 of the slider on the variable resistor 12 for temperature setting connected to the automatic temperature control circuit 11 of the burner provided in the dryer. A switch 15 and an ignition microswitch 16 having a closing contact are arranged along the rotation direction from the rotation start position of the slider, and the fire extinguishing microswitch 15 is placed between the automatic temperature control circuit 11 and the power source 23. An ignition microswitch 16 is interposed in series between the burner's ignition circuit 21 and the power supply 23 through the extinguishing microswitch 15, and the variable resistor 12 is provided with a series of functions for ignition, temperature setting, and extinguishing. Since it is configured to hold the burner, a series of operations for igniting the burner, setting the temperature after ignition, and extinguishing the burner can be easily and reliably performed using only the temperature setting variable resistor 12.
This has the effect of being able to prevent the occurrence of erroneous operations and simplifying the configuration of the control section in the dryer.

[Brief explanation of the drawing]

The drawings show one embodiment of the device of the present invention, and the first
The figure is an overall perspective view of the dryer, Figure 2 is an enlarged front view of its control section, Figure 3 is a circuit diagram of the burner control section, Figure 4 is a longitudinal cross-sectional side view of the temperature setting device, and Figure 5 is a rotating circle. FIG. 3 is a front view showing the operating state of the plate and the microswitch. 1...Grain dryer, 2...Hot air generator equipped with a burner, 3...Control unit, 7
...Drying time setting timer, 8...Temperature setting device, 11...Burner automatic temperature bracket circuit,
12... 9 variable resistors for temperature setting, 13...
...The slider rotating shaft, 14...Cam, 15.
...Fire extinguishing micro switch, 16...
Ignition microswitch, 19... Pump, 2
0... Temperature sensing element, 21... Burner ignition circuit, 22... Ignition element, 23...
power supply.

Claims (1)

[Scope of utility model registration request] A variable resistor for temperature setting connected to the automatic temperature control circuit of the burner installed in the dryer, and a fire extinguishing microswitch with an opening contact that moves on the rotating shaft of the slider and an ignition switch with a closing contact. The fire extinguishing micro switch is arranged between the automatic temperature control circuit and the power supply, and the ignition micro switch is arranged between the burner ignition circuit and the power supply. 1. An operating device for ignition, etc. in a dryer, characterized in that the variable resistor is interposed in series from the micro-switch for fire extinguishing through the fire extinguishing microswitch, and the variable resistor has a series of functions of ignition, temperature setting, and extinguishing.