JPS60216062A - Automatic dust discharger for air-cleaner - Google Patents

Abstract

PURPOSE:To open the dust outlet reliably by providing an electrical discharge valve at the dust collecting section. CONSTITUTION:The air is sucked through an inlet 3 into the casing 2 while produces forced spiral flow through a guidevane 9 to separate coarse dusts in the air centrifugally and fall down along the wall face of the casing 2 then pass through the gap between a partitioner 11 and the casing 2 to be accumulated on a dust pan 13. When starting the engine, a glow plug 15 is functioned through a glow controller 20 for the purpose of preheating. At the sametime, a solenoid valve 14 is functioned to open a valve 14a thus to discharge the dust accumulated on the dust pan 13 through a discharge port 14d with self-weight.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic dust discharge device for discharging dust and water accumulated in a casing of a cyclone air cleaner to the outside.

(Prior Art) Conventionally, there is a device of this type described in Japanese Utility Model Publication No. 18660/1983. This uses the intake negative pressure when the engine is running to open and close the pulp with a negative pressure motor.
This discharged dust to the outside.

However, in conventional filters, the opening and closing of the pulp tends to be incomplete due to the intake pulsation of the engine, and outside air may flow back into the casing from the exhaust port, impairing the filtering performance of the filter element.

(Objective of the Invention) The present invention attempts to reliably open and close the pulp by electrically controlling the pulp instead of opening and closing the pulp using negative intake pressure.

(Example) The present invention will be described below with reference to Examples. In Figure 1,
l indicates a cyclone air cleaner for internal combustion engines. An inlet 3 is attached to the cylindrical casing 2, and the inlet 3 opens into the casing 2. An outlet 4 is attached and opened at the center of the upper wall of the casing 2. In this casing 2, a U-shaped support 5 fixedly installed inside the outlet 4 is used, and a filter body 8 is attached with a partition plate 11 through a gasket 6 using a fastener 7 while sealing the filter body 8 with a guide vane 9 and a gasket 10. It is. A dust pan 13 is removably attached to the bottom of the casing 2 via a gasket 12.

A solenoid valve 14 including a valve 14a operated by an electric signal is attached to the bottom of the dust pan 13, and the solenoid valve 14 is controlled by the glow plug 1
It is designed to open and close with the operation of 5. In addition,
14C is a valve case, and 14d is a discharge port.

In the above configuration, the operation will be explained next.

When the outlet 4 is connected to the intake port of an internal combustion engine and the engine is operated, the air supplied to the internal combustion engine is sucked into the casing 2 through the inlet 3 and is forced into a swirling flow by the guide vanes 9. The dust is separated by the centrifugal force, descends along the wall of the casing 2, passes through the gap between the partition plate 11 and the casing 2,
It is collected on the dust pan 13. When starting the internal combustion engine, the glow plug 15 is operated by the glow controller 20 to preheat the engine. At this time, the electromagnetic valve 14 is also actuated to open the valve 14a, and the dust accumulated on the dust huff 13 is discharged by its own weight to the outside through the discharge port 14d. Note that since the valve 14a is activated when the internal combustion engine starts with a small amount of intake air, dust is not thrown up by the wind speed of the intake air (and since this is the time when the vibration of the internal combustion engine 16 is at its greatest, the dust is not blown up by the vibrations). Easily excreted.

Now, when the air from which the coarse dust has been centrifuged passes through the filter 8, the fine dust that could not be centrifuged is removed from the filter 8.
captured and cleaned by

This air passes through the center of the filter body 8 and the outlet 4
It is then inhaled into the internal combustion engine. Referring to FIG. 4, the circuit for supplying electricity to the glow plug and the circuit for supplying electricity to the solenoid valve will be specifically explained. 20 is a control circuit for the glow plug 15, and a key switch 201. Timer 202, relay switch 203
It is made up of. To explain its operation, when the key switch 201 is turned on, the timer 202 is activated.
Relay switch 203 is turned on for a certain period of time. As a result, battery voltage is supplied to the glow plug for that period of time. Here, glow plug 15 and relay switch 2
If the voltage from the midpoint 204 of 03 is used to operate the solenoid valve 14, the solenoid valve 14 will operate only when the glow plug is energized.

In the embodiment described above, the solenoid valve 14 was operated by the glow controller 20 only when the internal combustion engine was started.
A similar effect can be obtained by using the engine rotational speed and vehicle speed signals instead of the glow controller 20 and using the controller to operate the solenoid valve 14 only when the internal combustion engine is idling.

In addition, even though the solenoid valve 14 is activated when the engine is idling, even if the controller is controlled to open the valve 14a for a certain period of time after the internal combustion engine is stopped, the dust will be emitted only by its own weight, but the effect of evacuation is not expected. can.

The controllers used in the above two other embodiments will be explained below with reference to the drawings. FIG. 5 shows a circuit diagram of the controller 20 when the solenoid valve 14 is driven only when the engine is idling. To explain the case of a diesel engine, in Fig. 5, there is an engine rotation speed sensor signal (not shown) that detects the engine rotation speed from the rotation of the injection pump, and a vehicle speed sensor signal attached to the propeller shaft of the engine (also not shown). Sensor signals are input to the controller 20. Signals from the engine rotation speed sensor and vehicle speed sensor are waveform-shaped into rectangular waves by waveform shaping circuits 211 and 212, and are further waveform-shaped by F/V closing devices 213 and 214.
F/V conversion is performed at , and voltages proportional to engine speed and vehicle speed are obtained, respectively. The voltage corresponding to the engine speed is set by the COMPI comparator controller, vI.
compared to Therefore, when the engine speed falls below a certain value, the output of GOMPI 215 becomes 10'' level.

Also, the vehicle speed is the same, and the voltage corresponding to the vehicle speed is COMP2 2
It is compared with the set voltage v2 at step 16, and when the vehicle speed is less than the set value, the output of COMP2 becomes "0" level. And COM
The P1 and COMP2 signals are output by the NOR gate 217 to the buffer 218 when both are at the '0'' level, that is, when the vehicle speed and engine rotational speed are below a certain value.
The transistor Tr is driven through the solenoid valve 14 to drive the solenoid valve 14. Here, the vehicle speed is Okm/h and the engine rotation speed is 80Or.
pm or less, the solenoid valve 14 can be driven by the controller 20 only during idling.

Next, referring to FIG. 6, a controller 20 configured to drive the solenoid valve 14 only for a certain period of time after the engine is stopped will be described. When the key switch 19 is turned on, the signal is input to the controller 20 from the terminal 311. controller 2
At 0, the transistor 313 conducts through the diode 311 and the resistor 312 and drives the relay 22 connected through the terminal 314, which closes the contact of the relay 22 and supplies power to the terminal 315 circuit and the solenoid valve 14. will be done. The circuit 21 thus begins to operate.

Next, the key signal from the terminal 311 is shaped by the shaping circuit 316, and when the I+□1+ level is input, it becomes a "1" level output. This output is connected to the R (reset) terminal of the counter 317 and an inverter buffer 318, and drives the solenoid valve 14 by a transistor 320 via a resistor 319.

Here, when the key switch 19 is ON, the transistor 32
0 is not conductive, so the solenoid valve 14 is not activated (however, voltage is applied). Furthermore, since the R terminal of the counter 317 is also at the "1" level, it remains reset, and the Q terminal, which is the output terminal, is at the "0" level. Therefore, the ink buffer 321. Diode 322. resistance 32
The transistor 313 becomes conductive through the transistor 3. Therefore, in this state, the transistor 313 is made conductive by the signals from both the diode 311 and the diode 322. When the key switch 19 is turned off, the transistor 313 is turned on.
Since the signal from 1 becomes the "0" level, the output of the ink buffer 318 becomes the "1" level, the transistor 320 becomes conductive, and the solenoid valve 14 is driven. On the other hand, regarding the transistor 313, the signal from the diode 311 is at the "0" level, but the signal from the diode 322 remains at the "1" level, so it continues to conduct, and the relay 22
continues to be driven, so the contacts remain closed and the motor 14
Power continues to be supplied to the terminal 315. counter 3
17, when the key switch 19 is turned off, the R terminal becomes 0" level, so clock counting is permitted. The clock is transmitted from the oscillator 324 to the CL
input to the terminal. When the counter 317 executes a certain count, that is, after a certain period of time has elapsed, the Q terminal becomes “0”.
'' level, and the clock from the oscillator 324 is no longer input to the counter 317 by the OR gate 325.

On the other hand, the diode 3 via the inverter buffer 321
The signal from 22 becomes “0” level, and the diode 31
The signal from 1 is already “0” at 0FFQ of the key switch.
level, the transistor 313 is turned off, the relay 22 is no longer driven, the contact is opened, and the terminal 3
15 and the solenoid valve 14 is stopped. From the above, the solenoid valve 14 is activated only for a certain period of time after the key switch 19 is turned off. The length of this startup time can be arbitrarily set by selecting the oscillation frequency of the oscillator 324 and the Q terminal of the counter 317.

In each of the above embodiments, the electric discharge valve is constructed of a solenoid valve, but it is also possible to use, for example, an electric motor, and transmit the rotation of the electric motor to the valve body using, for example, gears to open and close the valve body. . Note that a servo motor is suitable for the above electric motor.

(Effects of the Invention) As described above, according to the present invention, the dust discharge port can be opened and closed reliably, and therefore the problem of backflow of dust unlike the conventional one does not occur.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIGS. 2 and 3 are diagrams for explaining the operation of FIG. 1, FIG. 4 is an electric circuit diagram for explaining the operation of FIG. 1, and FIG. 5 and 6 are electrical circuit diagrams for explaining other embodiments of the present invention. 14... Solenoid valve. Representative Patent Attorney Takashi Okabe Figure 1 Figure 2 AA

Claims (1)

[Scope of Claims] (11) An automatic dust discharge device for an air cleaner, which is a cyclone air cleaner, wherein an electric discharge valve is provided in the dust accumulation part, and the discharge valve is operated by an electric control circuit. (2) The above-mentioned The automatic dust discharge device for an air cleaner according to claim 1, wherein the control circuit issues a valve opening signal to the discharge valve only when the engine is started. (3) The control circuit issues a valve opening signal to the discharge valve only when the engine is idling. Claim 1 that emits a valve opening signal
Automatic dust evacuation device for air cleaners as described in Section 1. (4) The automatic dust discharge device for an air cleaner according to claim 1, wherein the control circuit issues a valve opening signal to the discharge valve only for a certain period of time after the engine is stopped.