JPH0212126B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a dust collector for automatically and efficiently brushing off dust adhering to a filter during dust collection operation according to a preset program. Regarding filter dust removal equipment.

[Conventional technology]

An important point in the continuous operation of a dust collector is the dust removal effect of the filter, and whether or not a dust collector can exhibit a stable dust collection effect over a long period of time depends entirely on the quality of the dust removal effect.

Japanese Patent Application No. 54-165956 filed by the applicant
The invention of No. 89816) is a dust collector configured such that a dust remover (pulse jet) automatically brushes off dust attached to a filter at predetermined intervals, and the invention is based on the invention of The control unit adjusts the length to make it longer or shorter depending on the amount of pressure detected, so that the pressure loss of the filter is automatically adjusted within the predetermined range of upper and lower limits, and the pressure loss of the filter is always maintained. By maintaining the desired state, it is possible to solve various problems such as a decrease in air volume due to an increase in pressure loss, or dust leakage due to an excessive decrease in pressure loss, and it is necessary for long-term stable operation of the dust collector. It can exhibit excellent effects.

[Problem that the invention seeks to solve]

However, in the filter dust removal device disclosed in the above application, if the most ideal pressure loss of the filter is set to △P, the upper limit value is automatically set to △P+10 and the lower limit value is automatically set to △P-10. In some cases, proper dust removal was not possible. In other words, the conventional filter dust removing device described above removes dust within the range of the predetermined upper limit value △P+10 and lower limit value △P-10, regardless of the type of dust, the material of the filter, etc. There have been problems in that it is insufficient or, conversely, excessive removal is repeated, resulting in an excessive drop in pressure loss. Furthermore, since the standard value of pressure loss is preset at the factory, etc., it is not possible to know specifically the value of the standard value △P that is actually set during operation. Since it is not possible to confirm the value of the pressure loss of the filter, the operation must be carried out entirely by feeling and completely left to the machine, and there is a problem that it is extremely difficult to operate the dust collection with the appropriate filter pressure loss. It was hot.

[Means for solving problems]

The present invention has been made to solve the above-mentioned problems, and its purpose is to improve the operation of the dust remover by taking into account various conditions such as the type of dust to be collected and the difference in the material of the filter. By setting the upper and lower limits of pressure loss that control The value and lower limit value are displayed on the display, and the value of pressure loss during current operation is also displayed on the display, making it possible to check the operating status of the dust collector and dust remover at a glance. The present invention provides a filter dust removal device for a dust collector.

Therefore, the filter dust removal device according to the present invention has the following features:
The display panel of the dust collector has a display that displays the differential pressure before and after the filter detected by the differential pressure detector in the form of a bar graph, and upper and lower limits that can be set arbitrarily for the upper and lower limits of the differential pressure. In addition to providing a setting knob for the dust collector, the controller of the dust collector is provided with a setting value display means for displaying the upper and lower limit values set by the setting knob on the display. The above-mentioned objects have been achieved and the problems of the prior art described above have been solved.

[Effect]

According to the filter dust removing device for a dust collector of the present invention configured as described above, the pressure loss of the filter is constantly displayed in the form of a bar graph on the display (LED display) of the display panel, and the The upper limit value and lower limit value suitably set by the means are displayed by lighting on the corresponding value portion on the display. When the dust adhesion to the filter progresses and the pressure loss reaches the upper limit, the dust remover is activated to remove the dust adhering to the filter.
If the pressure loss drops to the lower limit due to dust removal, the dust collection operation will continue, but if the pressure loss does not drop to the lower limit after one dusting, the dust collection will be repeated until the lower limit is reached. Do the following.
However, when the number of repeated brushings reaches a predetermined maximum number of times, a display and alarm to that effect is displayed and the dust collection operation is stopped, and dust removal is performed again to recover the filter.

〔Example〕

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In Fig. 3 and Fig. 4, 1 has a partition plate 2 inside which separates the clean chamber 3 and the filter chamber 4 into upper and lower sections.
The body of the dust collector is divided into rooms, and a fan 6 rotated by a motor 5 is installed inside the clean room 3.
Filters 7 are installed in the filter chamber 4. Reference numeral 8 indicates a dust bucket stored in the inner bottom of the filter chamber 4, and 9 indicates a dust suction port opened on the side surface of the filter chamber 4. Dust (not shown), etc. is collected under the suction action of a fan 6 rotated by the motor 5. The dust-laden air sucked into the filter chamber 4 through the dust suction port 9 is filtered by filters 7, and only clean air is exhausted from the clean chamber 3 to the outside of the machine body 1.

Also, what is generally indicated by the reference numeral 10 in FIGS. 3 and 4 is a pulse jet type dust remover which is an example of a dust remover, and this dust remover 10 is constructed as shown in FIG. a header pipe 11 and a compressor 11 that supplies compressed air to this pipe 11.
P and the header pipe 1 via the solenoid valve 12, respectively.
It is composed of the same number of broach tubes 13 as the number of rows of the filters 7 connected to the filter 1,
The distal end of each of these broach tubes 13 is inserted into the clean chamber 3 so that compressed air can be jetted into the corresponding filter 7.

The present invention is used for a dust collector equipped with the dust remover 10 as described above, and in FIG.
4 is the differential pressure before and after the filter, that is, the filter chamber 4
and a differential pressure detector, such as a diaphragm sensor, which detects the pressure loss ΔP of the filter 7 from each atmospheric pressure in the clean room 3. Reference numeral 15 indicates the above-mentioned solenoid valve based on the pressure loss detected by the differential pressure detector 14. 12
This is a control unit (microcomputer) that controls the opening and closing of the machine, or sends various display signals to the display panel 20 provided on the front of the aircraft body 1.

As shown in FIG. 5, the display panel 20 includes an LED display 21 that displays the pressure loss value of the filter 7 detected by the differential pressure detector 14 in the form of a bar graph 21a, an indicator lamp 22 for power supply, The sensor check clamp 23 lights up when there is no output signal from the differential pressure detector 14 to notify an abnormality, and lights up for 5 minutes after power is applied to notify that the upper and lower limit values of pressure loss can be variably adjusted. Setting permission lamp 24, a clogging alarm lamp that lights up to warn of clogging when the pressure loss of the filter reaches the upper limit and does not recover even after repeating the dust removing operation a preset number of times (for example, 5 cycles) 2
5. When the dust level bucket sensor 8S attached to the dust bucket 8 or other various sensor signals such as a temperature sensor (not shown) is caught, the sensor plan 26 lights up to warn you, and the pressure loss of the filter 17 increases and is removed. The dust removal lamp 27 blinks when an operation command is issued, the pressure loss drops to the lower limit due to dust removal, and the filter 7 refreshes, and the fan 6 rotates in the opposite direction if the power supply is connected in the opposite direction. A fan rotation lamp 28 is provided which lights up to warn when the fan rotation occurs.

Further, the display panel 20 is provided with an upper limit value setting knob 30 having a dial structure for setting the upper limit value of the filter pressure loss, and a lower limit value setting knob 31 having the same dial structure for setting the lower limit value, and further,
There are also power on/off switches 32 and 33, and a manual push button switch 34 that can open the solenoid valve 12 and blow out one cycle of pulsed air.

FIG. 6 is a block diagram showing the electrical configuration of the present invention, in which a control section 15 consisting of a microcomputer is shown.
is mainly composed of a CPU 15a, a memory 15b, and an interface 15c, and the interface 15c receives the filter pressure drop detection signal f1 sent from the differential pressure detector 14, and the upper and lower limit values. Setting signals f2 for the upper and lower limit values of filter pressure loss set by each setting knob 30, 31, sensor signal f3 from bucket sensor 8S, etc., switching signal f4 from mode switching switch 35 used for software switching. are input respectively. Further, from the interface 15c, a display signal f5 is sent to the LED display 21 of the display panel 20 and each lamp 22 to 28, and control signals f6 and f7 are sent to the dust remover 10 (specifically, the solenoid valve 12) and the fan motor 6. These displays and controls are executed according to the programs stored in the memory 15b.

Figure 7 is a flowchart of a program for setting the upper and lower limits of the filter pressure drop.In step S1, the setting permission lamp 24 on the display panel 20 is turned on for only 5 minutes after the dust collector starts operating, allowing variable adjustment. announce something. Next step S2
Now, dial setting knob 30 for upper limit value and lower limit value,
It is determined whether or not the setting operation in Step 31 was performed within a predetermined time, and if it is within the time, the upper and lower limit values set in the next step S3 are stored in the memory 15b, and further stored in the memory 15b. In the next step S4, the equal values are lit up and displayed P1 and P2 in the corresponding value portions of the LED display 21, respectively, as shown in FIG. If it is determined in step S2 that the adjustment is to be made after the lapse of time, the adjustment is disabled and dust removal is controlled using the previous upper limit value P1 and lower limit value P2.

Figure 8 shows the display on the display panel 20 and the dust remover 1.
A flowchart of the program that controls 0.
In the first step S5, the filter pressure loss sent from the differential pressure detector 14 is sequentially displayed on the LED display 21.
displayed in bar graph form (see Figure 5). In the next step S6, it is determined whether the detected filter pressure loss has reached the set upper limit P1 or not, and this routine is repeated until the filter pressure loss reaches the upper limit P1. When the filter pressure loss reaches the upper limit P1, the dust removal lamp 27 is turned on in the next step S7.
In the next step S8, the dust remover 10, that is, the solenoid valve 1
2 to jet compressed air into the filter 7. In the next step S9, it is determined whether or not the filter pressure drop has fallen to the lower limit value P2 as a result of the above-mentioned dust removal, and as shown in A in Fig. 2, the filter 7 is recovered by one dust removal. If so, proceed to the next step S10, flash the dust removal lamp 27 again to display a refresh, and complete the first step of the dust removal process.
End the cycle.

As a result of the judgment in step S9, if the filter 7 is not completely refreshed after one dust removal as shown in B in FIG. If the filter pressure drop is less than 3 times), the process returns to step S8 and the dust removal is repeated, and this routine is repeated until it is determined in step S9 that the filter pressure loss has reached the lower limit value P2.

In the case of B in Figure 2, by repeating the above dust removal five times, the filter pressure drop drops below the lower limit value P2 and is refreshed, but as shown in C in the same figure, even after five times of dust removal, the filter pressure drop reaches the lower limit P2. Not reached, step this
If it is determined in S11 that the number of times has exceeded, the process advances to step S12 and the clogging alarm lamp 25 is turned on.

After the lamp 25 is turned on, as shown in the figure, the operation of the dust collector is stopped in the next step S13, and a notification is given that the clogging of the filter 7 cannot be cleared by normal dust removal operation, or a preset warning is sent. In accordance with the software installed, the user selects and executes a program such as continuing dust removal by the dust remover 10 again, or stopping dust removal but continuing dust collection operation. Further, as the dust remover 10, other than the illustrated pulse jet type dust remover, various types of dust removers such as a dust remover type, a brush type, a backwash type, etc. may be used instead.

〔Effect of the invention〕

The filter dust removal device for a dust collector according to the present invention is as described above, and the filter dust removal is carried out between the set upper limit value and lower limit value, and the pressure loss of the filter is always maintained in a state suitable for dust collection. However, in the present invention, the pressure loss value of the filter during the current operation is displayed in the form of a bar graph on the display of the display panel. It is very convenient to proceed with the dust collection operation while visually checking the status of the dust remover, and the upper and lower limit values of pressure loss, which are the standards for controlling the dust remover, can be freely configured. Because of this, the upper and lower pressure drop widths can be arbitrarily set according to the material of the filter used and the type of dust to be collected to control the operation of the dust collector under optimal conditions and ensure proper operation of the dust collector. can do. In addition, in the present invention, since the set upper and lower limits of the pressure loss are displayed on the display device that displays the pressure loss during the operation in the form of a bar graph, the current pressure loss is the upper limit set. This has the advantage that the operating status of the dust collector can be accurately grasped by visually confirming the position between the value and the lower limit value.

[Brief explanation of drawings]

Figure 1 is a block diagram that clearly shows the overall structure of the present invention, Figure 2 is an explanatory diagram showing how the pressure loss of the filter changes due to dust removal, and Figure 3 is a front perspective view of a dust collector implementing the present invention. Figure 4 is a block diagram showing the internal structure and control system of the dust collector, Figure 5 is a front view of the display panel, Figure 6 is a block diagram showing the electrical configuration of the control section, and Figure 7 is the pressure FIG. 8 is a flowchart illustrating the flow of setting the upper and lower limits of loss. FIG. 8 is a flowchart illustrating the flow of pressure loss display and dust removal operation. 1 is the dust collector body, 3 is a clean room, 4 is a filter room, 5 is a fan motor, 7 is a filter, 10 is a dust remover, 14 is a differential pressure detector, 15 is a control unit, 20
21 is a display panel, 22 to 28 are display lamps, and 30 and 31 are upper and lower limit setting knobs.

Claims (1)

[Claims] 1 By adjusting the dust removal interval of the filter by the dust remover to be longer or shorter depending on the amount of differential pressure detected before and after the filter detected by the differential pressure detector, the differential pressure of the filter can be adjusted to the predetermined upper and lower limit values. In a dust collector configured to perform dust collection operation while adjusting the pressure within the range of Setting knobs are provided for the upper and lower limit values that can arbitrarily set the upper and lower limit values of the pressure, respectively, and the control section of the dust collector has the upper and lower limit values set by the above setting knobs. A filter dust removal device for a dust collector, characterized in that a set value display means is provided for displaying on the above-mentioned display device.