JPH02223661A - Air filter cleaning device - Google Patents

Abstract

PURPOSE:To perform cleaning in a way to reliably blow off dust present deep in a space near the wall of the outer periphery of a filter by a method wherein while a turn table is in a rest state, air nozzles are moved upward or downward by means of an air nozzle drive means. CONSTITUTION:A turn table 3 is mounted rotatably around a longitudinal axis in a cleaning chamber 6 of a cleaning housing 1. A turn table drive means 2 intermittently drives the turn table 3. While the turn table 3 is in a rest state, air nozzles 4 and 5 are moved upward and downward with the aid of an air nozzle drive means 7. This constitution enables execution of cleaning in a way to reliably blow off dust present deep in space near the wall of the outer periphery of a filter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air filter cleaning device for cleaning air filters used mainly to supply air to engines of large trucks and the like.

[Conventional technology]

Conventionally, air filters used to supply air to the engines of large trucks that travel long distances, for example,
Since the distance traveled per trip is long and the vehicle is often driven in areas with poor road conditions, it is easy for the vehicle to collect dust and the like, causing clogging. Therefore, I usually replaced the air filter with a new one after one or two trips.

However, if a new air filter is used every one or two trips, the cost will be high and transportation will not be profitable.

In view of the current situation of disposable items, the inventor of the present invention
No. 1-115084 proposed a device that cleans an air filter so that it can be used again and again.

As shown in FIG. 6, this filter cleaning device includes a filter installation board 2 that is constantly rotated by a drive motor (not shown) installed in a frame l, and a filter fixing board above the filter installation board 2. 3 is arranged vertically adjustable, while a nozzle 4 cleans the air filter A from inside and outside.
．． 5 are disposed inside and outside of the air filter A, and the nozzle 4.5 is arranged so as to be freely adjustable in position in the diametrical direction and movable up and down.

With this configuration, the air filter A is automatically cleaned by constantly rotating the air filter A and blowing air from the inside and outside of the air filter A with the nozzles 4 and 5.

[Problem to be solved by the invention]

The vertical movement of the nozzles 4 and 5 with respect to the air filter -A is carried out by fixedly connecting both nozzles 4 and 5 with a collecting box 7, and moving the collecting box 7 integrally in the vertical direction by a driving means. However, since the nozzle 4.5 is moved up and down to blow air while the filter installation board 2, that is, the turntable is constantly rotating, the air is blown in the vertical direction of the air filter A. There was a problem in that the deep side of the running folds (air filters are provided with a large number of chevron-shaped folds when viewed in cross section in order to increase the filtration area) cannot be sufficiently cleaned.

In view of this problem, it is an object of the present invention to sufficiently clean the folds of an air filter.

Furthermore, in the past, the vertical movement stroke of each of the nozzles 4 and 5 was set to approximately the height of the cleaning chamber 6, and therefore, these nozzles 4 and 5 were set inside and used for cleaning. It is related to the size (height) of filter A (
, it was always being moved up and down at maximum stroke.

For this reason, when cleaning small and medium-sized filters, the nozzle 4.5 has to inject air into the space above due to the shortened length of the filter, and this extra stroke is used for reciprocating operation. Therefore, there is a problem that the cleaning efficiency becomes very poor in terms of time and energy, and there has been a desire for efficient cleaning that is suitable for the size of the cleaning filter.

Further, according to the above-mentioned conventional technology, the filter A is held down by fitting the fixed plate 3 in the shape of a cone on the upper part,
In addition, the fixed plate 3 was rotated by a driving means, and the filter A was rotationally driven by frictional contact with the upper part of the filter A.

Further, depending on the filter, the lid may be attached to the top of the filter when it is washed.

In any of these cases, the operation of the nozzle 4 located inside the filter needs to have a short stroke in advance so as not to collide with the stationary plate 3 or the lid when rising. The stroke of the nozzle 5 located outside must be equal to or longer than the height (length in the axial direction) of the filter A.

It has been desired to be able to automatically obtain such a vertical stroke difference between the inner and outer nozzles 4.5 of the filter A by using a single drive system and using a hour wheel configuration. The present invention aims to also solve the problems of the prior art.

[Means to solve the problem]

In order to solve the above-mentioned problems, the air filter cleaning device according to the present invention is provided rotatably around the vertical axis in the cleaning chamber 6 of the cleaning housing 1, and the air filter A turntable 3 on which A is placed, a turntable drive means 2 that rotates the turntable 3 in a predetermined direction, and an inner and outer part that moves up and down in conjunction with each other by an air nozzle drive means 7 inside and outside the air filter A. In an air filter cleaning device comprising air nozzles 4 and 5, the turntable driving means 2 is configured to drive the turntable 3 intermittently, and while the turntable 3 is stationary, the air nozzle driving means 7 drives the air nozzle. 4.
5 was moved upward or downward.

As described in claim (2), the intermittent drive mechanism of the turntable drive means 2 has a plurality of holes 3b bored at a predetermined pitch on the outer circumference of the turntable 3, and a liquid hole 3b. Engageable and detachable operation protrusion 2a
It is preferable that the hydraulic cylinder 2b is provided with a hydraulic cylinder 2b.

Further, as described in claim (3), a mounting portion 9 for the air filter A is provided outside the clean chamber 6 of the cleaning housing 1 in parallel to the vertical movement locus of the outer air nozzle 5, and the mounting portion A sensor 10 for measuring the upper limit of the air filter A placed at 9 is provided so as to be able to change its vertical position freely, and when the outer air nozzle 5 reaches the sensor 10 for measuring the upper limit, the driving direction of the nozzle driving means 7 is changed. Preferably, it is configured to be inverted.

Further, as described in claim (4), the nozzle drive means 7 drives the inner nozzle drive mechanism 7A, the outer nozzle drive mechanism 7B, a cooperative drive mechanism 7C that interlocks and connects these two, and the outer nozzle drive mechanism 7B. The inner and outer nozzle drive mechanisms 7A and 7B each have a pair of sprockets 7a and 7b.
, 7c and 7d, and air supply pipes 4' and 5' connected to the inner and outer air nozzles 4.5 are connected to the chains 7e and 7f, which are wound between the chains 7e and 7d, and the linked drive mechanism 7
It is preferable that C is constituted by a chain 7g wound around each one of the sprockets 7a and 7d of the inner and outer nozzle drive mechanisms 7A and 7B.

Furthermore, as described in claim (5), one of the sprockets 7a and 7d of each of the inner and outer nozzle drive mechanisms 7A and 7B, around which the chain 7g of the linked drive mechanism 7C is wound, is attached to the outer nozzle drive mechanism. It is preferable that the sprocket 7d of the inner nozzle drive mechanism 7B has a smaller diameter than the sprocket 7a of the inner nozzle drive mechanism 7A.

[For production]

With the above configuration, when cleaning the air filter, first place the air filter A on the mounting section 9, move the upper limit measurement sensor 10 (explained using an example of a non-contact limit switch), and clean the air filter. Set it at the top position of A.

Put this air filter A (or the same type) into the clean chamber 6 of the cleaning housing 1, and put it in the turntable 3.
Place it on top. On the other hand, when the operating body 11 (magnet) provided on the outer air nozzle 5 rises due to the operation of the driving means 13 (rodless air cylinder in the embodiment), it reaches the upper limit measurement sensor 10. The limit switch is turned on by magnetic operation, and the drive rotation direction of the drive means 13 connected to the limit switch through a general electric control circuit is reversed, and the drive direction of the nozzle drive means 7 is reversed to cause the outside air to flow. The nozzle 5 is then turned downward. At this time, the inner and outer air nozzles 4.
Since the air nozzles 5 and 5 are driven in conjunction with each other, the inner air nozzle 4 naturally also changes from rising to falling.

When the inner and outer air nozzles 4.5 reach the upper and lower ends, the turntable drive is temporarily stopped, and a control signal is output in response to this to drive the turntable 3 on which the air filter A is placed. The means 2 is driven intermittently, so that the inner and outer air nozzles 4, 5
by placing it opposite to the next fold and blowing air vertically while the turntable 3 is stopped,
This is to sufficiently blow away dust deep within the folds on the outer circumferential surface of the air filter A.

〔Example〕

Embodiments of the air filter cleaning device according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the basic structure of the air filter cleaning device is as follows.

A turntable 3 having an opening 3a in the center is provided in a clean chamber 6 of a cleaning housing 1 so as to be rotatable around a vertical axis. This turntable 3 is equipped with a bearing 3C for smooth rotation.

A turntable driving means 2 is provided for rotating the turntable 3 in a counterclockwise direction when viewed from above in FIG. 3. As further shown in detail in FIG. 4, this turntable driving means 2 has a large number of holes 3b which are bored at a predetermined pitch along the circumferential direction near the outer periphery of the turntable 3, and which are sequentially engaged with the liquid holes 3b. and a fluid pressure cylinder 2b (here, an air cylinder is used, but a hydraulic cylinder or the like may be used) provided with an operating protrusion 2a that engages and disengages. By pushing the table 3 in a substantially tangential direction, the turntable 3 is simply rotated by a predetermined pitch. The pitch of the holes 3b can be set arbitrarily.

Reference numeral 2C denotes an urging spring, which swingably supports the base end of the hydraulic cylinder 2b, and when the hydraulic cylinder 2b is contracted, the entire spring escapes downward and the operating protrusion 2a This is so that it can be removed from the hole 3b and can be moved upwardly to engage the next hole 3b.

Reference numeral 2d denotes a positioning body, which is biased in the direction of engaging with the hole 3b of the turntable 3, and by engaging with the liquid hole 3b, holds the turntable 3 rotated at a predetermined pitch in position. This positioning body is shown as an exploded view in FIG. In response to forced rotation, it escapes upward.

In this turntable driving means 2, the operation protrusion 2a
The hydraulic cylinder 2b is provided diagonally with respect to the turntable 3 so that it can be easily removed from the hole 3b after a pushing operation, and a relatively large installation space is required for the fluid pressure cylinder 2b.

Therefore, as shown in FIG. 5, a cam surface 2e is provided on one side of the operating projection 2a so that the operating projection 2a of the fluid pressure cylinder 2b can be easily removed from the hole 3b after the pushing operation. When the cylinder is pulled, the operating protrusion 2a swings against the spring 2r and comes out of the hole 3b.
Another configuration may be adopted in which the turntable b can be installed substantially horizontally below the turntable 3.

An inner air nozzle 4 is provided through the opening 3a of the turntable 3 so as to be movable up and down, and at a position corresponding to the outer side of the air filter A placed on the turntable 3. An outer air nozzle 5 is provided so as to be movable up and down.

A nozzle driving means 7 is provided for moving the both supination-lateral air nozzles 4.5 up and down in conjunction with each other in a predetermined relative relationship.

The nozzle drive means 7 includes an inner nozzle drive mechanism 7A, an outer nozzle drive mechanism 7B, a cooperative drive mechanism 7C that interlocks and connects these two, and a rodless air cylinder serving as a drive means 13 that drives the outer nozzle drive mechanism 7B. It consists of

The loftless air cylinder 13, which is a driving means for the nozzle driving means 7, is connected to the turntable driving means 2.
When the outer air nozzle 5 rises and approaches or comes into contact with a sensor 10 for measuring the upper limit of the air filter, which will be described later, an electric signal is generated to stop the driving means 13 and to stop the driving means 13. An electrical control circuit configuration is adopted that operates the turntable driving means 2 intermittently.

Since this electrical control circuit is not particularly new and is based on a generally known technology, detailed explanation will be omitted here. The inner and outer nozzle drive mechanisms 7A and 7B have air supply pipes 4° connected to the inner and outer air nozzles 4 and 5 attached to chains 7e and 7f wound between a pair of upper and lower sprockets 7a and 7b and 7c and 7a, respectively.・Constructed by connecting 5 pieces. These air supply vibes 4”
5, the inner air nozzle 4 is a rigid pipe,
I used a flexible hose connected to this, but
A flexible hose was used directly for the outer air nozzle 5.

The cooperation drive mechanism 7C is the inner and outer nozzle drive mechanism 7.
It consists of a chain 7g wound around sprockets 7a and 7d on each side of sprockets A and 7B. Of the sprockets 7a and 7d of each of the inner and outer nozzle drive mechanisms 7A and 7B around which the chain 7g of the cooperative drive mechanism 7C is wound, the sprocket 7d of the outer nozzle drive mechanism 7B is the one of the sprockets 7d of the inner nozzle drive mechanism 7A. Although it is configured to have a smaller diameter than the sprocket 7a and is driven by the same nozzle drive means 7, the outer nozzle drive mechanism 7B operates faster than the inner nozzle drive mechanism 7A, and the difference is The outer air nozzle 5 moves for a long stroke, thereby automatically and fully cleaning the outer side of the air filter A, which has a longer cleaning range than the inside of the air filter A. This prevents you from hitting the parts.

A storage section 9 for an air filter A is provided outside the clean chamber 6 of the cleaning housing 1 parallel to the vertical movement trajectory of the outer air nozzle 5, and a sensor for measuring the upper limit of the air filter placed on the mounting section 9 is provided. 10 is provided so that its vertical position can be changed freely. This change in the vertical position of the upper limit measurement sensor 10 is as follows:
It is configured to be performed manually as appropriate.

Reference numeral 8 denotes a dust collecting means, which is provided in the washing housing 1 and includes a suction fan and an electric motor that drives the same, in order to collect dust scattered from the air filter A by the intragastric and outer air nozzles 4.5. (all not shown).

In FIG. 1, reference numeral 12 denotes a proximity switch attached to the head of the inner air nozzle 4, which determines the lifting limit of the inner air nozzle 4 so that the inner air nozzle 4 can rise and reach the upper part of the air filter. When approaching the lid (if present), a switch is actuated to activate a control circuit that reverses the driving direction of the nozzle driving means 7,
As a result, safety in the upper limit operation range is ensured, and a guarantee function that takes priority over the upper limit measurement sensor 10 is shared.

Although the lower limits of the inner and outer air nozzles 4 and 5 can be determined very easily in the initial setting, a separate limit switch may be provided to control this lower limit.

Further, in this embodiment, a fluid pressure cylinder was used as the turntable driving means 2, and a rodless air cylinder was used as the driving source of the nozzle driving means 7, but it is possible to replace each with a normal electric motor. Of course, even in this case, it is only necessary to simply drive the turntable 3 and control both the inner and outer air nozzles 4.5 to stop them at their upper and lower ends using a known electrical control circuit.

Further, in this embodiment, the turntable 3 and the mounting section 9
Since the explanation has been made on the premise that the lower reference is set from the beginning and the lower reference is configured at approximately the same level, an explanation of the reversal from descending to ascending is unnecessary and omitted. However, the turntable 3 and the mounting section 9 may be set at different levels, and the difference may be separately converted and corrected, and measurement sensors may be provided above and below.
In short, it is only necessary to detect the size of the air filter A in advance outside the clean room 6 and efficiently obtain the nozzle stroke in accordance with the size of the air filter A.

〔Effect of the invention〕

According to the air filter cleaning device according to claim (1) of the present invention, since air can be injected while moving the nozzle in the vertical direction while the turntable is stopped, dust in the depths of the folds on the outer periphery of the filter can be removed. This has resulted in the effect of being able to reliably blow away and clean the particles.

Further, according to claim (2), since the intermittent driving means for the turntable is provided by a fluid pressure cylinder and a hole in the turntable, there is an advantage that the structure can be extremely simple.

Moreover, according to claim (3), there is an advantage that the most efficient cleaning corresponding to air filters of various sizes can be automatically performed.

Moreover, according to claim (4), there is an advantage that the structure of the nozzle driving means can be a simple and inexpensive structure such as a chain or a sprocket, while ensuring reliable operation and reducing the occurrence of trouble.

Furthermore, according to claim (5), the most efficient stroke of the inner and outer air nozzles can be obtained to match air filters of various sizes by adjusting the size of the sprocket.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the air filter cleaning device according to the present invention. 3 is a plan view of the turntable, FIG. 4 is a vertical side view showing a driving means for the turntable, FIG. 5 is a vertical side view showing another driving means for the turntable, and FIG. 6 is a conventional It is a vertical side view of the whole which shows a technique. In the figure, ■...Cleaning housing, 2...Turntable driving means, 3...Turntable, 3a...Opening, 4...
...Inner air nozzle, 5...Outer air nozzle, 6...Clean room, 7.
... Nozzle driving means, 8... Dust collection means, 9...
・Placement part, 10... Upper limit measurement sensor, 11.
... Operating body, 13... Drive means, A... Air filter 7A... Inner nozzle drive mechanism, 7B... Outer nozzle drive mechanism, 7C... Cooperation drive mechanism, 7a, 7b, 7c. 7d... Sprocket, 7e・7
・7g...Chain, 4° ・5゛...Air supply pipe. Fig. 7 Fig. 2 Fig. 5

Claims (5)

[Claims] (1) A turntable 3 that is rotatably provided around a vertical axis in the clean chamber 6 of the cleaning housing 1 and on which the air filter A is placed, and a turntable that rotates the turntable 3 in a predetermined direction. inner and outer air nozzles 4 that are moved up and down in conjunction with each other by a drive means 2 and an air nozzle drive means 7 inside and outside the air filter A;
5, the turntable driving means 2 is configured to drive the turntable 3 intermittently, and while the turntable 3 is stationary, the air nozzle driving means 7 drives the air nozzle 4,
An air filter cleaning device characterized in that 5 is moved upward or downward. (2) The intermittent drive mechanism of the turntable drive means 2 includes a large number of holes 3b bored at a predetermined pitch in the outer periphery of the turntable 3, and an operation protrusion 2a that can be freely engaged with and detached from the holes 3b. 2. The air filter cleaning device according to claim 1, further comprising: a hydraulic cylinder 2b; (3) A mounting part 9 for the air filter A is provided outside the clean chamber 6 of the cleaning housing 1 parallel to the vertical movement locus of the outer air nozzle 5, and the air filter A placed on the mounting part 9 is The upper limit measurement sensor 10 is provided so that its vertical position can be changed freely, and the driving direction of the nozzle driving means 7 is reversed when the outer air nozzle 5 reaches the upper limit measurement sensor 10. The air filter cleaning device according to claim 1 or 2, characterized in that: (4) The nozzle drive means 7 includes an inner nozzle drive mechanism 7
A, an outer nozzle drive mechanism 7B, a cooperative drive mechanism 7C that interlocks and connects these two, and a drive means 13 that drives the outer nozzle drive mechanism 7B, and each of the inner and outer nozzle drive mechanisms 7A and 7B has a pair of Sprocket 7a
・Chain 7e and 7f wound between 7b, 7c and 7d
, air supply pipes 4' and 5' connected to the inner and outer air nozzles 4 and 5 are connected to each other, and the linked drive mechanism 7C is configured by connecting sprockets 7a and 5' to each one of the inner and outer nozzle drive mechanisms 7A and 7B, respectively. Chain 7g wrapped around 7d
The air filter cleaning device according to any one of claims (1) to (3), comprising: (5) Among the sprockets 7a and 7d of each of the inner and outer nozzle drive mechanisms 7A and 7B around which the chain 7g of the linked drive mechanism 7C is wound, the outer nozzle drive mechanism 7B
The sprocket 7d of the inner nozzle drive mechanism 7A is configured to have a smaller diameter than the sprocket 7a of the inner nozzle drive mechanism 7A.
) to (4).