JPH089832A - Filter - Google Patents

Abstract

PURPOSE:To provide a filter remarkably improved in filtration efficiency in spite of its small size, free from generation of noise and capable of minimizing attachments to be connected. CONSTITUTION:This filter is composed of a housing (A), a filter medium 13 set in the housing, an air-jetting unit 18 set above the filter medium in the housing and a propeller fan 19 capable of being rotated by the air jetted from the air-jetting unit and set at the upper part of the housing.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a filtration device.

[0002]

2. Description of the Related Art In general, various pollutants are generated in an aquarium for breeding and watching aqueous plants and animals. For example, in an aquarium for aquatic animals, excrement, dregs, algae and the like pollute the water. If this is left unattended, the transparency of the water itself and the water tank will decrease, not only will the ornamental effect be poor, but the increase in the generation of harmful components such as ammonia and nitrogen will also lead to the loss of life of animals and the loss of plant life. Since abnormal growth may occur, various filtration devices for eliminating contaminants in water have been conventionally used to prevent this.

In a conventional filtration device used in an aquarium for breeding and ornamenting aqueous plants and animals, (1) as shown in FIG. 6, in a container 102 separate from the aquarium 101, one type of chemical fiber material or A filter cage consisting of a plurality of types of filters only or a filter medium 103 comprising a sand layer and a filter is housed, and a net basket 1 is provided at the lower end.
Motor pump 106 via water pipe 105 having 04
By which the water in the water tank is pumped up, the water is discharged from the water discharge pipe 107 to the surface of the filter medium 103 in the container 102 and circulated, and the water is returned from the return pipe 108 to the water tank. (2) Bottom surface as shown in FIG. Alternatively, a container 10 having a large number of water guiding holes on its side surface
9, the filter medium is housed in the container 9, the container 109 is placed at the bottom of the water tank 101, and the upper end of the container is connected to the motor pump 111 via the water absorption pipe 110 to allow the water in the water tank to flow through the filter medium to drive the motor. What is returned from the pump 111 to the water tank via the return pipe 112, (3) As shown in FIG. 8, the water in the water tank is transferred to the container 115 outside the water tank via the water absorption pipe 114 having the net basket 113 at the bottom of the water tank. Provided motor pump 116
In some cases, the liquid is sucked into the container 115 to be passed through the filter medium contained in the container and then returned to the water tank through the return pipe 117. In order to supply oxygen into the water, it is common to send air into the water tank from an air pump placed outside the water tank through a pipe.

[0004]

However, in all of the above-mentioned conventional filtration devices, a clarification filtration method using a filter (chemical fiber material, filter paper, etc.) and / or a granular filter material layer (sand layer, etc.) as a solid-liquid separation mechanism. However, since the water in the water tank is directly passed through the filter medium to capture the pollutants in the water by the filter medium, the filtration efficiency is relatively low.

That is, in any of the above-described conventional filtration devices, since particles which are pollutant factors are directly captured by the filter medium in the filtration process, an increase in the amount of captured particles causes
Within a relatively short period of time, the filtrate flow path in the filter medium is narrowed and completely blocked, causing so-called clogging. Therefore, in the above (1), unfiltered water pumped up by the pump passes through the surface of the filter medium and returns to the water tank as it is, and in the (2) and (3), it is clogged. As a result, the water passage speed in the filtration device is reduced, so that a weak or no water flow region occurs in the water tank, and the pollution factor sediments and concentrates at the bottom of the water tank, forming sludge and generating harmful components. . Then, the sludge-like polluted factor floats in the aquarium along with the water flow caused by the swimming of the aquatic animal or the feeding of air.

[0006] In order to prevent early complete clogging of the filtration surface due to such contaminants, it is necessary to secure a large filtration area, so there is the drawback that the filtration device becomes large. Recently,
Very small aquatic plants and animals tend to be admired and bred in small aquariums. For such a small-sized water tank, there is a demand for a small-sized filter device having a good size and a high filtration efficiency.

Further, in each of the above-mentioned conventional filtration devices, since a motor pump is used to forcibly circulate water, there is a problem that power cost is increased and noise is generated.

Further, in the conventional filtering device, the filter medium accommodating portion (102, 109, 115) which is a main body for performing the filtering function.
In addition to the water absorption pipe with a net basket (104, 105; 13, 1
14), water discharge pipe (107), motor pump (106, 1)
(11, 116), return pipes (108, 112, 117) and the like are connected, so the external appearance is impaired, and handling during cleaning is not easy.

In view of the above points, an object of the present invention is to provide a filtration device which has a significantly improved filtration efficiency even in a small size, does not generate noise, and requires a minimum number of attached members. Then, the first invention aims to provide a filtration device in which the filtration efficiency is remarkably improved and the noise is not generated by efficiently increasing the fluid passage speed in the filter medium by using means other than the motor pump. And It is an object of the second invention to provide a filtration device which has a significantly improved filtration efficiency even if it is small in size, by combining a plurality of types of filtration systems in a unique order. It is an object of the third and fourth inventions to provide a configuration of a filter medium accommodating portion and a fluid accelerating portion for facilitating the assembly of the above filtering device.

[0010]

In order to achieve the above object, the first aspect of the present invention is to provide a housing in which a portion other than a bottom surface and an upper surface is hermetically sealed, a filter medium provided in the housing, and an inside of the housing above the filter medium. And an propeller fan which is provided on the upper part of the housing and is rotated by the air ejected from the air ejector.

A second aspect of the invention is a housing, an introduction tube for introducing a raw fluid into the housing from the bottom of the housing, and a settling portion formed between the bottom wall and the peripheral wall of the housing and the introduction tube. A filter medium accommodating portion provided in the housing above the introducing cylinder, an air ejecting portion provided in the housing above the filter medium accommodating portion, and an air outlet provided at an upper portion of the housing, and the air ejecting portion is provided. And a propeller fan rotated by air ejected from the portion, the filter medium accommodating portion has an inverted cone-shaped separating surface having an apex on substantially the center of the introducing cylinder, and the separating surface is It is characterized by having a collision surface for colliding the pollution factor contained in the raw fluid and deflecting it toward the settling portion, and a large number of through holes for allowing the liquid to pass therethrough.

In a second aspect of the present invention, an ascending funnel-shaped guide portion extending to an intermediate position of the separation surface of the filter medium accommodating portion at an upper end portion of the introduction tube and an upper end portion of the guide portion is provided. It is characterized in that it is provided with a partition member having a downward funnel-shaped guide portion that is inclined toward the sedimentation portion.

According to a second aspect of the present invention, a weight / filter medium accommodating portion for accommodating a weight / filter medium is formed below the settling portion of the housing, and the raw fluid is applied to the bottom of the weight / filter medium accommodating portion. It is characterized in that a through hole is formed for passing through the filter / accommodating material storage portion, and a through hole is formed in the introducing cylinder for allowing a fluid from the weight / filter material accommodating portion to pass through to the introducing cylinder.

Further, in the second invention, the through hole of the separation surface is
It is a vertical slit that is continuous from the lower end to the upper end of the separation surface, and is characterized by being arranged in the circumferential direction.

In addition, in the second aspect of the invention, the housing has a locking portion for fitting and locking the filter medium storage cartridge fitted inside the upper portion of the peripheral wall thereof, and the filter medium storage portion is provided on the lower surface. A container body having a reverse pyramidal separation surface having a collision surface and a large number of through holes for allowing fluid to pass therethrough, and containing a filter medium therein; and a lid closing an opening on the upper surface of the container body. Have,
It is formed in a cartridge type with a locked part that is locked when it is fitted inside the upper part of the peripheral wall of the housing, and the air ejection part and the propeller fan have different diameters that open to the upper and lower surfaces. The air ejection portion is attached to the inside of the lower portion of the tubular cap, the other end of the connecting pipe having one end joined to the air ejection portion is projected to the outside of the cap, and the air ejection portion is provided inside the upper portion of the cap. Is formed in a cartridge type by incorporating a propeller fan above, and the lower end of the cap is detachably coupled to the upper end of the housing.

A filter medium accommodating portion according to a third invention has a conical pyramidal separating surface having a collision surface on the lower surface and a large number of through holes for allowing fluid to pass therethrough, and a container body having a filter material accommodated therein. When,
It has a net-like lid that closes the upper surface of the container body, and is detachably fixed inside the upper part of the housing of the filtering device according to any one of claims 2 to 7.

In the fluid accelerating portion according to the fourth aspect of the invention, an air jet portion is attached to the inside of the upper portion of a cap having a different diameter, which is open to the lower surface and the upper surface, and the other end portion of the connecting pipe whose one end is connected to the air jet portion. Is formed outside the cap, and is formed by incorporating a propeller fan above the air ejection portion of the cap, and the lower end portion of the cap is the filter device according to any one of claims 2 to 7. It is characterized by being detachably attached to the upper part of the housing.

[0018]

According to the first aspect of the present invention, with the above structure, the fluid in the housing is levitated by the levitation force of the air bubbles ejected from the air ejection portion, and the continuously rising air bubbles rotate the propeller fan. Of the filtered fluid is forced out and the passage speed is increased. Therefore, the filtration efficiency of the filter medium in the housing is significantly improved. Also, the strong fluid flow forces the contaminants outside the bottom of the housing into the device.

In the second aspect of the invention, the raw fluid introduced into the upper part of the housing from the bottom of the housing rises by the bubbles continuously ejected from the air ejecting part and the propeller fan rotated by the bubbles. The particles having a relatively large diameter contained in the raw fluid collide with the collision surface of the separation surface and are deflected toward the sedimentation portion, and the sedimentation is increased. Partly settles and is concentrated. Particles contained in the fluid that has passed through a large number of through holes on the separation surface of the filter medium storage unit are captured by the filter medium stored in the filter medium storage unit, and the passed fluid is forcibly forced by rising bubbles and a rotating propeller fan. And is discharged from the outlet of the housing.

At the upper end of the introducing cylinder, an upward funnel-shaped guide portion extending to an intermediate position of the separating surface of the filter medium accommodating portion and a descending portion inclined from the upper end of the guiding portion toward the settling portion. In the case where the partition member having the funnel-shaped guide portion is provided, the collision of particles with the separation surface is promoted, the separation effect is improved, and the rising of the contaminants settled in the settling section is prevented.

A weight / filter medium accommodating portion is formed below the settling portion of the housing, and a through hole for allowing a raw fluid to pass through the weight / filter medium accommodating portion is formed at the bottom of the weight / filter medium accommodating portion, and When the introduction cylinder is formed with a through hole for allowing a fluid to pass from the weight / filter material storage portion to the introduction cylinder, primary filtration by the weight / filter material storage portion, reflection separation by the separation surface, sedimentation by the precipitation portion, and filtration Since the filter medium filtration or blocking filtration is performed four times by the material container, a very reliable filtering effect can be obtained.

In the case where longitudinal slits which are continuous from the lower end to the upper end of the separation surface are arranged on the separation surface in the circumferential direction, it is possible to reduce the increase of the passage resistance due to the pollutant being locked on the separation surface. It

The housing is provided with a locking portion for fitting and locking the filter medium containing cartridge, and the filter medium containing portion is formed in a cartridge type by providing a locked portion to be locked with the locking portion of the housing. In the case where the air ejection portion and the propeller fan are attached to the upper and lower sides of the caps having different diameters to form a cartridge type, and the lower end portion of the cap is detachably coupled to the upper end portion of the housing, By fitting and locking the filter medium storage cartridge in the housing, and connecting the air ejecting part and the propeller fan cartridge to the upper end of the housing, the filter device can be easily assembled and can be easily disassembled for cleaning. can do.

The filter medium accommodating portion according to the third aspect of the present invention is formed in a cartridge type and has a locked portion for fitting and locking on the upper part of the housing, so that it can be easily attached to and detached from the housing of the filtering device. It is possible to remove adhered substances on the separation surface
Easy to wash. It is also possible to replace the filter medium storage unit independently.

Since the fluid accelerating portion according to the fourth aspect of the invention is formed in a cartridge type and is detachably attached to the upper part of the housing of the filtering device, it can be easily removed by removing it when necessary and taking out the filter medium accommodation part from the housing. Can be washed. It is also possible to replace the fluid accelerating unit alone.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is carried out as an aquarium filtration device will be described with reference to the drawings. 1 is a vertical cross-sectional view of a filter device according to a first embodiment, FIG. 2 is a plan view of the same, FIG. 3 is a cross-sectional view of essential parts showing a holding state of a filter medium accommodating portion and a fluid accelerating portion with respect to a housing, and FIG. It is a top view of an air ejection part.

The apparatus of this embodiment is used by leaving it stationary in a water tank, but generally speaking, a cylindrical housing A is sealed except for the upper and lower surfaces, and an upper part inside the housing. The filter medium accommodating portion B is attached, and the fluid accelerating portion C is attached to the upper end of the housing.

At the center of the bottom plate 1 of the housing A, there is provided an introduction tube 2 which communicates the outside and the inside of the housing.
The lower end portion of the introducing cylinder 2 is equal to the bottom surface of the bottom plate 1, and the upper end portion of the introducing cylinder 2 extends upward in the housing. Then, on the upper surface of the bottom plate 1, a weight and filter medium 3, for example, a group of pebbles or a ceramic ball group, which is easy to handle, is housed up to an intermediate portion of the height of the introduction tube 2. On the upper side of the weight / filter material 3, a doughnut-shaped partition plate 5 whose inner diameter substantially matches the outer diameter of the introduction tube 2 and whose outer diameter matches the inner diameter of the peripheral wall 4 of the housing.
Is fitted into the introduction tube 2 and holds down the weight / filter material 3, and is fixed by locking the inner diameter edge of the partition plate 5 with the locking projection 6 formed on the outer surface of the intermediate portion of the introduction tube. There is. The partition plate 5 can be removed upward so that the weight / filter material 3 can be washed or replaced.

A partition plate 5 for the bottom plate 1 and the introduction tube 2
A large number of through holes 7 and 8 are formed in the lower part than
The water in the water tank can pass from the through hole 7 of the bottom plate 1 through the weight / filter material 3 into the introduction tube 2.
At the lower end of the housing A or on the lower surface of the bottom plate 1, when the filter device is left standing on the bottom of the water tank, the water in the water tank is sucked into the introduction tube 2 between the upper surface of the bottom of the water tank and the bottom plate 1. A foot 9 is formed to secure a flow path for the operation.

Further, by fixing the partition plate 5 to the middle portion of the height of the introduction cylinder 2, a precipitation portion 10 opened upward is formed between the introduction cylinder 2, the peripheral wall 4 and the partition plate 5. ing.

The filter medium accommodating portion B includes a hollow container body 11 and
It is composed of a lid 12 that closes the upper opening of the container body. The container body 11 contains a mass of chemical fibers, ceramic particles, balls, or any other filter medium 13. The lid 12 may be detachably attached to facilitate cleaning of the filter medium when the filtrate channel of the filter medium is blocked by the trapped particles.

The container body 11 has a separating surface whose lower portion is formed in an inverted cone shape, and a large number of through holes 14 are formed in the separating surface. Forming a surface. Further, the lid 12 is formed in a net shape. Therefore, in the filter medium accommodating portion B, water can flow into the container body 11 through the through holes 14 from below, pass through the filter medium 13 and flow out upward from the lid 12.

Then, as shown in FIG. 3, the filter medium container B
Is engaged with the housing A from above and engages with a stepped portion 16 which is a locking portion formed near the opening edge of the housing A with a flange 15 which is a locked portion formed at the upper end of the container body 11. By stopping, the apex of the lower end of the separation surface is made to coincide with substantially the center of the introduction tube 2, and the housing A
It is removably attached to the upper part of the inside.

With the filter medium accommodating portion B fixed in the housing A, the apex of the container main body 11 faces the center of the introducing cylinder 2, and the oblique separating surface is slightly upward from the upper end of the introducing cylinder 2. It is separated.

The fluid accelerating portion C includes a cap 17 having a tubular shape having different diameters, which is open on the upper and lower surfaces, an air ejection portion 18 attached to the inside of the lower portion of the cap, and a propeller fan 19 attached to the inside of the upper portion of the cap. It is configured.
The cap 17 includes an upper small diameter portion 17a and a lower large diameter portion 1a.
7b and has a convex shape in cross section, and has a large diameter portion 17b.
Has a diameter equal to that of the peripheral wall 4 of the housing A. As shown in FIG. 3, the lower end portion of the cap 17 is fitted to the upper end portion of the peripheral wall 4, and the projection 20 formed at the lower end portion of the cap 17 is attached to the peripheral wall of the housing. It is fixed by a snap-in method in which it is elastically fitted into a hole 21 formed in the upper end portion of 4, and the fluid accelerating portion C can be separated from the housing A when necessary.

The connecting pipe 2 bent in an L-shape from below is formed in the through hole 22 formed in the step portion 17c of the cap 17.
3 is press-fitted and attached with one end of the cap 3 protruding from the upper surface of the cap 17, and the stop ring 24
Is prevented from falling off. At the other end of the connecting pipe 23 existing inside the cap 17, the air ejection portion 18 is provided.
Are connected. As shown in FIG. 4, the air ejection portion 18 is formed in a hollow disk shape, and a plurality of air ejection ports 25 are preferably formed on the upper surface thereof along one or double circumferences. The air ejection portion 18 is fixed at a position where its center coincides with the center of the small diameter portion 17a of the cap 17.

Radially formed ribs 26 and 27 are provided inside the lower end and the upper end of the small-diameter portion 17a of the cap 17, and the outer ends of the ribs are connected to the cap, and the upper and lower ends of the ribs are connected to the cap. Bearing portions 28 and 29 facing each other are formed in the center of the rib. And the small diameter portion 17
The propeller fan 19 is provided on the inner side of a, and its shaft 30
The upper and lower parts of the bearing are rotatably supported by bearings 26 and 27, respectively. In order to facilitate the bearing of the propeller fan 19 by the bearing portions 28 and 29, the small diameter portion 1 of the cap is
7a is divided into upper and lower portions at its intermediate portion, and is joined by bonding, fitting or screwing at the dividing surface.

In the above structure, the peripheral wall 4 of the housing A and the cap 17 may be integrally connected, but in the preferred embodiment, the filter medium accommodating portion B is detachably attached to the housing A in a cartridge type. The fluid accelerating portion C is of a cartridge type in which the air jetting portion 18 and the propeller fan 19 are attached to the cap 17, and when the fluid accelerating portion C is removed from the housing A, the filter medium storage portion B is opened. It can be easily removed. However, the shape of the housing A and the shape of the cap 17 are not limited to those in the above embodiment. That is, the peripheral wall 4 of the housing A integrally includes the large diameter portion 17b of the cap 17, and the cap 17 includes the small diameter portion 17b.
b and the step portion 17c provided at the lower end thereof may be integrally provided.

Next, the operation of the structure of this embodiment will be described. The filter device of the present invention is used by connecting the end of the air discharge pipe of a known air pump to one end of the connecting pipe 23, leaving the filter device stationary at the bottom of the water tank, and operating the air pump. The bubbles ejected from the air ejecting portion 18 rise in the filtered water flow path in the cap 17 due to the floating force. As a result, the water in the cap portion 17 is floated. Further, the bubbles that are continuously ejected from the air ejection portion 18 and float up cause the propeller fan 19 to rotate. Therefore, the water in the cap 17 is forcibly discharged upward and decompressed, and the unfiltered water in the water tank is vigorously sucked into the introduction tube 2 from between the bottom surface of the housing A and the top surface of the bottom of the water tank. Be done.

In this way, the water in the water tank is sucked in from the bottom of the filter and discharged upward together with the bubbles from the upper end surface, so that a circulating water flow is generated in the water tank. Then, the water sucked into the filtering device from the introducing cylinder 2 is passed through the through hole 14 provided on the separation surface of the container body 11 of the filter medium accommodating portion B.
From inside the container body, passing through the filter medium 13 housed in the container body, passing through the lid 12 and flowing out into the flow path of the cap 17, Cap 1 by the propelling force of propeller fan 19
It is again discharged from the channel 7 into the water tank.

When the weight / filter medium 3 is housed in the bottom of the housing A and the through hole 7 is formed in the bottom surface of the housing and the lower part of the introduction tube, part of the sucked water is the weight / filter medium 3 at the bottom of the housing. Through the through hole 8 and enters the introduction tube 2. At this time, the pollutant contained in the unfiltered water is captured by the filter medium. As time passes, the trapped particles increasing in number block the fluid channel of the filter medium, so that the initial filtration of the filter medium is switched to the closed filtration, and the filtration efficiency is improved.

The unfiltered water sucked into the introducing cylinder 2 rises in the introducing cylinder. Since the upper end portion of the introduction tube is close to the lower surface of the filter medium storage portion B and opens toward this, particles having a relatively large diameter contained in the unfiltered water are contained in the container body 1 of the filter medium storage portion.
The first colliding with the collision surface of the portion where the through hole 14 does not exist and is reflected in the direction of the sedimentation portion 10. Since there is almost no water flow in the settling section 10, the pollutant factors reflected by collision settle in the settling section, accumulate over time, and are concentrated. That is, in this filtering device, the pollutant separated from the water in the water tank is taken in and stored in the device.

Water rising from the introduction tube 2 and the container body 11
The fine particles which are not collided and reflected by the separation surface of the above flow into the filter medium storage portion B through the through holes 14 of the container body, and the filter medium 13
As a result, fine particles are captured. Since the separation surface of the filter medium accommodation portion is formed in an inverted cone shape that is oblique to the water flow, a large filtration area can be secured. Therefore, the filtration efficiency is good. Further, since a large amount of the filtrate in the filter medium storage portion flows in a region having a low passage resistance, the amount of trapped pollutants increases from the peripheral portion of the filter medium storage portion at the initial use of this device, and the blockage progresses to increase the passage resistance. As the number increases, the particle trapping area gradually approaches the area near the apex. Therefore, the high passage speed of the forced water flow is maintained for a long period of time.

The effect of the apparatus of this embodiment will be described. A forced water flow is generated in the apparatus by the continuous rising and rising of air bubbles from the air jetting section 18 and the rotation of the propeller fan 19 by the filter medium 3 at the bottom of the housing. Filtration, filter material storage B
Since three types or four types of filtering actions, that is, reflective separation by the separating surface, sedimentation concentration in the settling unit 10 and filtration by the filter medium 13 in the filter medium storage unit, are performed, very high filtration efficiency can be obtained even with a small device. Then, the pollutant having a large diameter sucked from the introduction tube 2 is separated at the separation surface of the filter medium storage unit and settles and concentrates in the settling unit 10, so that the filter medium storage unit B
The ability to capture fine particles is maintained for a long period of time. Therefore, the cleaning cycle period is longer than that of the conventional device. In addition, since the pollutant factor captured from the water in the aquarium is stored in the device, the generation of components harmful to the animals in the aquarium or the occurrence of animal disease is suppressed, or the abnormal growth of plants in the aquarium is suppressed. Is prevented.

FIG. 5 is a vertical sectional view showing a second embodiment of the present invention. Members that are the same as or correspond to the members of the previous embodiment are given the same reference numerals, and only different configurations will be described. In the present embodiment, an upward funnel-shaped guide portion 31a extending to an intermediate position of the separation surface of the filter medium accommodating portion B is provided at the upper end portion of the introduction tube 2 and the upper end portion of the guide portion. A partition member 31 having a downward funnel-shaped guide portion 31a inclined in the direction of the portion 10 is provided. Further, the through holes 14 on the separation surface of the filter medium storage portion B are formed as vertical slits continuous from the lower end to the upper end of the separation surface, and are arranged in the circumferential direction.

Since the partition member 31 has the upward funnel-shaped guide portion 13a extending substantially in parallel with the separation surface of the filter medium accommodating portion B, the water rising in the introducing cylinder is located at a position close to the separation surface. As you will be guided to flow along this,
This has the effect of promoting collision separation of the particles of the filtered water injection on the separation surface.

Further, since the downward funnel-shaped guide portion 31b inclined in the direction of the settling section 10 is provided, turbulent vortex flow is prevented from being generated in the settling section, so that the settling action of the separated particles is surely performed. Further, the pollutant factor once settled in the settling section 10 is prevented from flying up, and the trapped substance is reliably reserved.

The through hole 14 on the separation surface of the container body B
Since it is formed in the shape of a vertical slit, there is no risk that the pollutant will be locked in the through hole and block it early. Further, even if the pollution factor is locked in a part of the slit, there is an advantage that it is easily separated from the slit by the continuous rising water flow. Therefore, the timing of the decrease in the passage speed of the fluid in the device is delayed. In addition, reference numeral 26 in FIG. 5 is a net attached to the lower end portion of the introduction tube 2 as necessary in order to prevent the fish in the aquarium from entering.

As mentioned above, the filtration device according to the invention comprises:
It is used to stand in a fluid, allow the fluid to circulate in the device, and separate and capture the pollutants or substances or particles contained in the fluid. Therefore, as described above, this filtering device is suitable and effective as a filtering device for an aquarium for breeding and appreciating aqueous animals and plants in which accumulated water is used. However, not only this, but also, for example, polishing oil or cutting oil in machine tools. Therefore, it can also be used to separate the abrasive grains or cutting chips contained therein. It can also be used to separate dust from the air in a closed room. An appropriate type of filter medium may be selected according to the application.

[0050]

As described above, in the filtering device according to the first invention, the propeller fan is rotated by the air ejected from the air ejecting portion provided above the filter medium in the housing. Even with a small size, the filtration efficiency is remarkably improved, noise is not generated, and a minimum number of accessory members can be connected.

According to the second aspect of the invention, the housing has a settling portion formed between the bottom wall and the peripheral wall of the housing and the introducing tube,
The filter medium accommodating portion has an inverted-pyramidal separation surface having an apex approximately on the center of the introduction cylinder, and the separation surface collides with the pollution factor contained in the raw fluid and deflects it toward the precipitation portion. Since it has a large number of through holes that allow liquid to pass through, the amount of pollutants directly captured by the filter medium is small, which prevents the fluid from passing through the filter medium at an early rate and delays the timing of complete blockage. Therefore, the filtration efficiency is further improved.

Further, according to the third aspect of the invention, since the filter medium accommodating portion is formed in a cartridge type and has the locked portion to be fitted and locked at the upper portion of the housing, the housing of the filtering device is provided. It is possible to easily attach and detach the filter medium to and from it, and it is possible to easily remove and wash the deposits on the separation surface, and it is also possible to replace the filter medium accommodating portion independently.

Further, according to the fourth aspect of the invention, since the fluid accelerating portion is formed in a cartridge type and is detachably attached to the upper portion of the housing of the filtering device, it can be removed when necessary and the filter medium accommodation portion can be removed from the housing. It can be taken out and easily washed, and the fluid accelerating part can be replaced independently.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a cross-sectional view of a main part showing a holding state of a filter medium accommodating portion and a fluid accelerating portion with respect to a housing.

FIG. 4 is a plan view of an air ejection portion.

FIG. 5 is a vertical sectional view of a second embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view of an example of a conventional aquarium filtration device.

FIG. 7 is a vertical cross-sectional view of another example of a conventional aquarium filtration device.

FIG. 8 is a vertical cross-sectional view of still another example of the conventional aquarium filtration device.

[Explanation of symbols]

 A housing 1 bottom plate 2 introduction cylinder 3 weight / filter material 4 peripheral wall 5 partition plate 7,8 through hole 9 feet 10 sedimentation portion B filter material storage portion 11 container body 12 lid 13 filter material 14 through hole 15 flange (locked portion) 16 Step part (locking part) C Fluid acceleration part 17 Cap 18 Air ejection part 19 Propeller fan 23 Connection pipe

Claims (8)

[Claims] 1. A housing which is sealed except for a bottom surface and an upper surface, a filter medium provided in the housing, an air ejecting portion provided in the housing above the filter medium, and an air ejecting portion provided in the upper part of the housing. A filtering device comprising: a propeller fan that is rotated by air ejected from an ejection unit. 2. A housing, an introduction cylinder for introducing a raw fluid from the bottom of the housing into the inside of the housing, a settling portion formed between the bottom wall and the peripheral wall of the housing and the introduction cylinder, and the introduction cylinder. A filter medium storage portion provided above the filter medium storage portion, an air jet portion provided inside the housing above the filter medium storage portion, and an air outlet formed at an upper portion of the housing and jetted from the air jet portion. And a propeller fan rotated by air, the filter medium accommodating portion has an inverted cone-shaped separation surface having an apex on substantially the center of the introduction tube, and the separation surface is included in the raw fluid. A filtering device comprising: a collision surface for colliding a pollutant factor to be deflected in the direction of the settling portion, and a large number of through holes for allowing a liquid to pass therethrough. 3. An upward funnel-shaped guide portion extending to an intermediate position of the separating surface of the filter medium accommodating portion substantially parallel to the separating surface of the introducing cylinder, and inclined from the upper end portion of the guiding portion toward the settling portion. The filter device according to claim 2, further comprising a partition member having a downward funnel-shaped guide portion. 4. A weight / filter medium accommodating portion for accommodating a weight / filter medium is formed below a settling portion of the housing, and a raw fluid is passed to the weight / filter medium accommodating portion at the bottom of the weight / filter medium accommodating portion. The filter device according to claim 2 or 3, wherein a through hole for allowing the fluid to pass from the weight / filter medium accommodating portion to the introducing cylinder is formed in the introducing cylinder. 5. The through hole of the separation surface is a vertical slit continuous from the lower end to the upper end of the separation surface, and is arranged in the circumferential direction. The filtration device according to. 6. The housing has a locking portion for fitting and locking a filter medium containing cartridge fitted inside the upper portion of the peripheral wall thereof, and the filter medium containing portion has a lower surface through which a collision surface and a fluid pass. A peripheral wall of the housing, which has a container body having a reverse pyramid-shaped separating surface having a large number of through-holes and which accommodates the filter medium therein, and a lid which closes an opening on the upper surface of the container body. It is formed in a cartridge type with a locked part that is locked when it is fitted inside the upper part of the air jet part and the propeller fan. The air ejection portion is attached to the inside of the lower portion, the other end of the connecting pipe having one end coupled to the air ejection portion is projected to the outside of the cap, and the propeller is provided above the air ejection portion inside the upper portion of the cap. It is formed into a cartridge type by incorporating a fan. Filtration device at the lower end of the cap is according to any one of claims 2 to 5, characterized in that it is detachably coupled to the upper end of the housing. 7. A container body having a conical surface having a collision surface and a large number of through holes for allowing fluid to pass therethrough, and containing a filter medium therein, and an upper surface of the container body. A filter medium accommodating cartridge, which has a net-like lid that closes and is detachably fixed inside the upper part of the housing of the filtering device according to any one of claims 2 to 7. 8. An air ejecting portion is attached to the inside of the upper portion of a cap having a different diameter, which is open to the lower surface and the upper surface, and the other end of the connecting pipe whose one end is connected to the air ejecting portion is projected to the outside of the cap. The cap is formed by incorporating a propeller fan above the air ejection portion of the cap, and a lower end portion of the cap is detachably attached to an upper portion of a housing of the filtering device according to any one of claims 2 to 7. A fluid acceleration cartridge characterized in that