JP2005238071A - Filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter in which the degassing function in priming operation is enhanced by a simple structure, and the lowering of the pumping function and filtering function in filtering operation is prevented. <P>SOLUTION: In the filter 1 of this invention, a filtering unit 2 has a filter material 12 and a lid member 10 for holding this filter material; a pump unit 4 and an intermediate unit 6 are installed below the filtering unit and have a raw water sucking passage 50 through which the raw water is sucked inside the intermediate unit, a pump room 46 into which the raw water is sucked from this raw water sucking passage, an impeller 34 which is installed in the pump room and which rotates around the vertical shaft line, a casing 42 which lifts the raw water sent by pressure from the pump room by the rotation of the impeller to make it flow into a filtering room 14, and a filtrate sending-out passage for sending out a filtrate from the filtering unit; and in the raw water sucking passage, a priming water hole 62 communicating with a filter material hollow part 12c is provided, and this priming water hole is provided with a valve element 64 for opening and closing the hole. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a filter, and more particularly, to a filter that filters raw water of all properties such as a plating solution for plating an electronic component, an integrated circuit, and the like and other liquids.

Conventionally, as for a filter for filtering raw water such as a plating solution for plating an electronic component or an integrated circuit, a filter provided with a filter medium in a plastic cylindrical housing is known (for example, Patent Documents). 1).
An example of such a conventional filter will be specifically described with reference to FIGS. FIG. 13 is a partially broken schematic view of a conventional filter, and FIG. 14 is a cross-sectional view of the conventional filter shown in FIG.
As shown in FIGS. 13 and 14, the conventional filter 200 includes a pump unit 204 having a centrifugal pump 202, a filter unit 206, and an intermediate unit 207 provided between the pump unit 204 and the filter unit 206. And have.
In the pump unit 204, the spiral pump 202 is disposed on the base 210 so that the drive axis 208 extends in the horizontal direction. A discharge port 212 directed upward in the vertical direction is provided on the circumferential extension of the pump chamber 211 of the centrifugal pump 202.
Between the discharge port 212 and the raw water inlet 213 of the intermediate unit 207, connecting means 214 such as a pipe or a hose for connecting the two is provided.
The filter unit 206 includes a cylindrical housing 216 and a lid 217 detachably attached to the housing 216, and a filtration chamber 218 is formed in the cylindrical housing 216. A cylindrical filter medium 220 is provided at the center of the filtration chamber 218, and a filter medium holding member 222 extends through the center (hollow part) of the cylindrical filter medium 220. The filter medium 220 is held at the center of the filtration chamber 218 by the filter medium fixing nut 219 and the filter medium holding member 222.
In the conventional filter 200 described above, when the pump unit 204 is operated, the raw water is pumped from the pump unit 204 to the intermediate unit 207 via the connecting means 214 and sent to the filtration chamber 218 of the filter unit 206. The raw water pumped into the filtration chamber 218 passes through the filter medium 220 to become filtrate, and this filtrate flows between the holding member 222 and the inner peripheral surface of the filter medium 220 and returns to the intermediate unit 207, so It is sent out from the direction exit (not shown).

Utility Model Registration No.3082767

However, in the conventional filter 200, as described above, the pump unit 204 and the filter unit 206 are separate structures, and in order to make both function, Additional additional means such as connecting means 214 must be provided. For this reason, the space required for the entire filter 200 increases, and there is a problem that the apparatus cannot be reduced in size.
Moreover, in the conventional filter 200, since the space required for the entire filter 200 is large, the amount of raw water flowing through the filter 200 during the operation of the filter 200 is increased. For chemicals, etc., the amount of raw water used is increased, which is uneconomical.
Furthermore, in the conventional filter 200, the inlet 213 into which raw | natural water flows into the filter unit 206 through the intermediate unit 207 from the connection means 214, such as piping or a hose, is one place. For this reason, the raw water is not uniformly supplied to the entire filtration surface of the filter medium 220 in the filter unit 206. By providing a baffle plate or the like for rectifying the raw water near the inlet 213, the dispersion effect of the raw water in the filtration chamber 218 is obtained. Even if it is increased, there is a problem that a uniform filtering action cannot be obtained.
Further, in general, in the suction operation of the pump, normally, a priming operation is performed in which the pump chamber is filled with raw water in advance before the pump operation. In the pump unit 204 of the conventional filter 200, the spiral pump 202 is disposed on the base 210 such that the drive axis 208 extends in the horizontal direction, and is directed vertically upward on the circumferential extension of the pump chamber 211. Since the discharge port 212 is provided, the air 224 remains above the raw water in the pump chamber 211 even when the expiration operation is completed (see FIG. 14). As a result, in the conventional filter 200, it takes time to remove the air 224 remaining in the pump chamber even immediately after the pump is operated, and fine bubbles are generated in the filtration chamber 218, thereby reducing pump efficiency and filtration efficiency. There is a problem that it ends up.
Furthermore, in the conventional filter 200, the filter medium 220 may contract due to a heat cycle of the raw water (the state of the raw water is repeatedly changed between a high temperature state and a low temperature state), and a gap may be formed on the end surface. For this reason, there exists a problem that raw | natural water will enter between the holding member 222 and the inner peripheral surface of the filter medium 220 from the clearance gap, will mix with a filtrate, and will reduce a filtration function.

Then, this invention is made | formed in order to solve the problem of the prior art mentioned above, and it aims at providing the filter which filters raw | natural water efficiently while economically reducing a filter. Yes.
Another object of the present invention is to provide a filter with a simple structure that enhances the deaeration function during the exhalation operation and prevents the pump function and the filtration function from being deteriorated during the filter operation.

In order to achieve the above object, the present invention includes a filtration unit that filters raw water, a pressure feeding unit that feeds raw water to the filtration unit, and sends the filtrate filtered by the filtration unit to the outside of the filtration unit. The filter section includes a filter medium and a filter medium holding member that holds the filter medium, the pumping section is provided below the filter section, and the pump section A raw water suction passage for sucking raw water into the interior, a pressure feeding chamber into which raw water is sucked from the raw water suction passage, an impeller provided in the pressure feeding chamber and rotating around a vertical axis, and a pressure feeding from the pressure feeding chamber by the rotation of the impeller. The raw water raising means for raising the raw water and flowing into the filtration part, and a filtrate delivery path for sending the filtrate from the filtration part to the outside of the pumping part, and the raw water suction path, Calls communicating in the filtration section A hole is provided, and the exhalation hole is provided with a valve body that opens the exhalation hole when the pumping unit exhales and closes the exhalation hole when the pumping unit operates. It is said.
In this invention comprised in this way, when raw water is poured from the filtration part at the time of the exhalation operation before a filter driving | operation, a valve body will raise by the buoyancy by an original water and will open an exhalation hole. As a result, the air remaining in the filter can be efficiently removed in a short time.
Further, during the operation of the filter, a raw water suction force is generated from the raw water suction passage toward the pumping chamber, and the valve body is lowered by this suction force to close the expiratory hole. As a result, it is possible to prevent the pumping function from being lowered during operation of the filter.

In this invention, it is preferable that a valve body consists of material which has specific gravity below the specific gravity of raw | natural water. Thereby, the structure of a valve body can be simplified and a reliable valve mechanism can be realized.
Moreover, in this invention, it is preferable that the raw | natural water suction path is connected to the raw | natural water side in a filtration part by the expiration hole.
Furthermore, in this invention, the raw | natural water suction path may be connected to the filtrate side in the said filtration part by the said exhalation hole.
In the present invention, the diameter of the expiratory hole is preferably about 14 mm to about 25 mm. Thereby, regardless of the properties (surface tension, viscosity, etc.) of any raw water, the air remaining in the filter during the exhalation operation can be surely and efficiently deaerated.
Furthermore, in this invention, it is preferable that the filter medium holding member is provided with the elastic member which seals the edge part of a filter medium. Thereby, even when the entire length of the filter medium contracts due to the heat cycle of the raw water, the elastic water of the elastic member can surely seal the raw water and the filtrate in the filtration section, and completely prevent them from mixing.

  As described above, according to the filter of the present invention, it is possible to provide a filter that can reduce the size of the filter and efficiently and economically filter raw water. Further, the simple structure can enhance the deaeration function during the exhalation operation, and prevent the pump function and the filtration function from being lowered during the filter operation.

Hereinafter, several embodiments of the filter of the present invention will be described with reference to FIGS. 1 to 9.
FIG. 1 is a schematic front view showing a filter according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the filter according to the first embodiment of the present invention shown in FIG.
As shown in FIGS. 1 and 2, the filter 1 according to the first embodiment of the present invention includes a filter unit 2, a pump unit 4, an intermediate unit 6 (details will be described later) made of synthetic resin, and the like. These units 2, 4 and 6 are configured such that the units are fixed together by fastening bolts 7b and nuts 7c into bolt holes 7a passing therethrough.
The filter unit 2 includes a cylinder housing 8 fixedly disposed on the intermediate unit 6, and a lid member 10 is screwed to the upper end of the cylinder housing 8. Each component such as the cylinder housing 8 of the filter unit 2 described above is made of synthetic resin or the like.
Further, in the cylinder housing 8, a single cylindrical filter medium 12 for filtering raw water is held by the upper surface (details will be described later) of the lid member 10 and the intermediate unit 6, and an outer peripheral surface 12a of the filter medium 12 and the cylinder A filtration chamber 14 is formed by the inner peripheral surface 8 a of the housing 8 and the inner surface 10 a of the lid member 10. The raw water supplied into the filtration chamber 14 from the intermediate unit 6 side during the filter operation passes from the outer peripheral surface 12a of the filter medium 12 to the inner peripheral surface 12b and is filtered, and this filtrate is the hollow portion 12c of the filter medium 12. It is supposed to flow through.
Here, an elastic member such as a coil spring 16 that presses the upper end portion 12 d of the filter medium 12 downward is provided inside the lid member 10. When the lid member 10 is attached to the cylinder housing 8, this coil spring is provided. The upper and lower parts of the filter medium 12 are always securely sealed by the elastic action of the filter 16 so that the raw water around the filter medium 12 does not pass through the filter medium 12 from the upper and lower parts of the filter medium 12 into the filter medium hollow portion 12c. It has become.

The pump unit 4 includes a base housing 18 that forms a base of the pump unit 4 and is made of a synthetic resin or the like. In the base housing 18, a drive motor 20 and a drive shaft 20a are provided. It is fixedly arranged so as to extend in the vertical direction. A cooling fan 22 made of synthetic resin or the like is attached to the lower end portion of the drive motor 20. As the cooling fan 22 rotates, wind flows into the base housing 18 from a plurality of cooling air inlets 24 provided on the bottom surface of the base housing 18. Then, the heat generated in step S3 is cooled so as to escape from the cooling air outlet 26 provided at the upper part of the base housing 18.
On the other hand, a drive rotator 28 is attached to the upper end of the drive shaft 20a of the drive motor 20, and this drive rotator 28 includes a magnet 30 in a cylindrical body made of a material such as aluminum, and the drive motor. When 20 operates, it rotates with the drive shaft 20a.
A cylindrical recess 32 is formed at the uppermost portion of the base housing 18, and the impeller 34 is accommodated in the cylindrical recess 32 so as to be rotatable about the same central axis as the drive shaft 20 a of the drive motor 20. Has been. The impeller 34 includes therein a magnet 36 that is attracted to the magnetism of the magnet 30 of the drive rotator 28 and is magnetically coupled to the drive rotator 28 via the bottom surface of the cylindrical recess 32 so that the drive rotator 28 rotates. At the same time, it rotates around the fixed shaft 38.
Further, a casing 42 (details will be described later) made of synthetic resin or the like is fixedly attached to the flange portion 40 of the cylindrical recess 32 via an O-ring 44, and the pump chamber is formed by the casing 42 and the cylindrical recess 32. 46 is formed.
The structure of the impeller 34 described above is a structure in which the rotational driving force of the drive motor 20 is magnetically transmitted by the drive rotating body 28, but is not limited to this structure. For example, the drive shaft of the drive motor 20 20a extends into the pump chamber 46, the impeller 34 is directly fixed to the drive shaft 20a extending into the cylindrical recess 32, and a mechanical seal or the like is provided at the shaft seal portion of the pump chamber 46 and the drive shaft 20a. May be.

The casing 42 includes at least three or more pump chamber inlets 48. The raw water in the raw water tank (not shown) installed outside the filter 1 passes through the raw water supply pipe (not shown) from the raw water tank (not shown) to the raw water suction path 50 of the intermediate unit 6. It comes to be supplied. In addition, the raw water in the raw water suction path 50 is prevented from flowing back to the raw water tank (not shown) by a check valve (not shown) provided at the upstream end of the raw water suction path 50, etc. When the pump unit 4 is operated, the raw water suction passage 50 passes through the pump chamber inlet 48 and is sucked into the pump chamber 46.
Furthermore, a vortex chamber 52 that is inclined upward in the vertical direction along the circumferential direction of the casing 42 is formed on the bottom surface of the casing 42. In the vortex chamber 52, the raw water in the pump chamber 46 flows into the vortex chamber inlet 52 a by the rotation of the impeller 34, and the raw water flowing from the vortex chamber inlet 52 a flows through the vortex chamber 52. And a vortex chamber outlet 52b that flows out to the outside. The outer diameter of the vortex chamber 52 is substantially equal to the diameter of the pump chamber 46, and the distance from the vortex chamber inlet 52 a to the vortex chamber outlet 52 b along the vortex chamber 52 is approximately the outer diameter of the vortex chamber 52. It corresponds to one arc.

Next, FIG.3 and FIG.4 is the top view and bottom view which show the intermediate unit of the filter by 1st Embodiment of this invention. 5 and 6 are enlarged cross-sectional views of the intermediate unit portion of the filter according to the first embodiment of the present invention shown in FIG. 2 during the expiration operation and during the filter operation, respectively. 3 to 6, the solid arrow indicates the flow direction of the liquid flowing in the filter according to the first embodiment of the present invention during the exhalation operation and during the filtration operation, and the dotted arrow indicates the present invention. The flow direction of the air which flows through the inside at the time of the expiration water operation and filter operation by the filter by one Embodiment is shown.
Hereinafter, the configuration of the intermediate unit 6 of the filter 1 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6.
The intermediate unit 6 includes the raw water suction path 50 as described above, and this raw water suction path 50 is connected to a pump chamber inlet 48 provided in the casing 42. When the pump unit 4 is operated, the raw water passes through the raw water suction passage 50 from the outside of the filter 1 and flows into the pump chamber 46 from the raw water suction passage outlet 50a through the pump chamber inlet 48.
The intermediate unit 6 includes a rectifying chamber 54. The raw water that has flowed into the pump chamber 46 from the raw water suction passage 50 through the pump chamber inlet 48 flows through the vortex chamber 52 of the casing 42 from the vortex chamber inlet 52 a by the rotation of the impeller 34 of the pump chamber 46. It flows toward the outlet 52 b and is sent to the rectifying chamber 54.
Further, a cylinder housing holding projection 56 for holding the lower end of the cylinder housing 8 is formed on the upper surface of the intermediate unit 6. Inside the projection 56 in the radial direction, an inner projection 58 and an outer projection 60 for holding the filter medium 12 are formed. Is formed.

A priming hole 62 is formed at the center of the upper surface of the intermediate unit 6 surrounded by the inner protrusion 58, that is, above the vicinity of the raw water suction passage outlet 50a. A raw water suction chamber 63 formed between the raw water suction passage outlet 50 a and the pump chamber inlet 48 communicates with the hollow portion 12 c of the filter medium 12 through the expiratory hole 62.
The expiratory hole 62 is provided with a valve body 64 that opens the expelling hole 62 when the pump unit 4 is stopped and closes the expelling hole 62 when the pump unit 4 is operated. (Details will be described later).
Here, the material of the valve body 64 is preferably a material whose specific gravity is equal to or lower than that of raw water. For example, when the specific gravity of raw water is about 1.0, a material such as polypropylene having a specific gravity of about 0.9 is used. Is preferred.
In the filter 1 according to the present embodiment, the lid member 10 is removed and raw water is poured into the filter 1 from above the cylinder housing 8 during the exhalation operation before the filter operation when the pump unit 4 is stopped. The raw water is filled in advance in the entire flow path and the room of the filter 1. At this time, the valve body 64 is lifted by the buoyancy caused by the raw water to open the expelling hole 62, and the air remaining in the raw water suction passage 50 and the pump chamber 46 passes through the hollow portion 12 c of the filter medium 12 from the raw water suction chamber 63. The air is deaerated upward (see FIG. 5) and finally discharged to the outside of the filter 1.
Furthermore, a stopper 66 is provided at the lower end of the valve body 64 so as to protrude radially outward of the expiratory hole 62. When the valve body 64 is raised most, the stopper 66 is located at the edge of the expelling hole 62. The valve body 64 is locked so that the valve body 64 cannot be lifted by a predetermined distance or more.
Here, regarding the diameter of the expiratory hole 62, in order to reliably and efficiently deaerate the remaining air regardless of the nature (surface tension, viscosity, etc.) of any raw water, the space on the structure and the production cost From about 14 mm to about 25 mm, and most preferably about 20 mm.

On the other hand, in the filter 1 according to the present embodiment, a suction force is generated in the raw water suction chamber 63 and the raw water suction passage 50 of the intermediate unit 6 during the filter operation (when the pump unit 4 is operated). Due to this suction force, the valve body 64 is lowered and comes into contact with the O-ring 68 around the expiratory hole 62 so that the expelled hole 62 is sealed.
Furthermore, on the upper surface of the intermediate unit 6, at least four or more filtration chamber inlets 70 are provided between the cylinder housing holding protrusion 56 and the outer protrusion 60, that is, on the upper surface of the rectifying chamber 54. It is formed symmetrically about the expiratory hole 62.
The raw water in the pump chamber 46 is rectified from the vortex chamber 52 of the casing 42 through the rectifying chamber 54, then sent from the plurality of filtration chamber inlets 70 into the filtration chamber 14, and filtered through the filter medium 12. It is like that.
The intermediate unit 6 is provided with a filtrate delivery path 72 in parallel with the raw water suction path 50, and the filtrate delivery path 72 is provided between the inner protrusion 58 and the outer protrusion 60 of the intermediate unit 6. It is connected to the liquid outlet 74. The filtrate in the hollow portion 12 c of the filter medium 12 that has passed through the filter medium 12 flows from the filtrate delivery port 74 through the filtrate delivery path 72 and is sent out of the filter 1.

Next, the operation (action) of the filter 1 according to the first embodiment of the present invention described above will be described.
First, as a pre-stage of the operation of the filter 1, a priming operation is performed so that the entire flow path of the filter 1 is filled with raw water. In the cylinder housing 8 opened by removing the lid member 10, raw water is poured into the filtration chamber 14 from above. The raw water in the filtration chamber 14 flows into the pump chamber 46 from the filtration chamber inlet 70 through the rectifying chamber 54, the vortex chamber outlet 52b, and the vortex chamber inlet 52a.
The raw water flowing into the pump chamber 46 is filled in the pump chamber 46, and then flows from the pump inlet 48 into the raw water suction path 50 through the raw water suction chamber 63. At this time, the valve body 64 positioned immediately above the raw water suction chamber 63 is raised by the buoyancy caused by the raw water, and the expiratory hole 62 is opened (see FIG. 5). The air remaining in the raw water suction passage 50 and the pump chamber 46 passes through the open expiratory hole 62 from the raw water suction chamber 63 and escapes upward toward the hollow portion 12c of the filter medium 12, and finally. Is discharged to the outside of the filter 1, and the entire flow path of the filter 1 is degassed and filled with raw water.

The above-described exhalation operation is completed, the lid member 10 is attached to the cylinder housing 8 of the filter 1 filled with raw water, the pump unit 4 is activated, and the operation of the filter 1 is started. Specifically, the drive motor 20 of the pump unit 4 operates, and the cooling fan 22 and the drive rotating body 28 rotate.
When the drive rotator 28 rotates, the magnet 36 of the impeller 34 is attracted by the magnetism of the magnet 30 of the drive rotator 28, and the impeller 34 in the pump chamber 46 rotates following the drive rotator 28. Due to the rotation of the impeller 34, further raw water is sucked into the pump chamber 46 from the raw water suction passage 50 through the pump chamber inlet 48.
At the same time, a suction force is generated in the raw water suction chamber 63 and the raw water suction passage 50 of the intermediate unit 6. Due to this suction force, the valve body 64 descends and comes into contact with the O-ring 68 around the expiratory hole 62 to seal the expelled hole 62 (see FIG. 6).
The raw water accommodated in the pump chamber 46 flows into the vortex chamber 52 from the vortex chamber inlet 52 a of the casing 42, and rises toward the vortex chamber outlet 52 b while flowing in the vortex chamber 52. The raw water rising while flowing in the vortex chamber 52 exits the vortex chamber outlet 52b and flows to the rectifying chamber 54, and becomes rectified raw water.
The raw water rectified in the rectifying chamber 54 is dispersed and uniformly flows into the filtration chamber 14 from the plurality of filtration chamber inlets 70 provided on the upper surface of the rectifying chamber 54, and the filter medium 12 provided in the filtration chamber 14. Is uniformly supplied to the outer peripheral surface 12a. The raw water supplied into the filtration chamber 14 passes from the outer peripheral surface 12 a of the filter medium 12 to the inner peripheral surface 12 b to become filtrate, and the filtrate is filtered from the hollow portion 12 c of the filter medium 12 to the filtrate outlet 74. Then, it flows to the filtrate delivery path 72 and is sent to the outside of the filter 1.

According to the filter 1 by 1st Embodiment of this invention mentioned above, the drive motor 20 of the pump unit 4 is arrange | positioned vertically by the lower part of the intermediate unit 6 so that the drive shaft 20a may extend perpendicularly | vertically. For this reason, the internal space of the filter 1 through which raw water and filtrate flow is reduced, the amount of liquid flowing through the entire inside of the filter 1 is reduced, the amount of raw water to be used is reduced, and the conventional filter is installed. The area can be reduced.
Further, according to the filter 1 according to the first embodiment of the present invention, the expelling hole 62 and the valve body 64 are provided above the vicinity of the raw water suction passage outlet 50a of the intermediate unit 6, so that the pump chamber The air remaining in the interior of the chamber 46 can be efficiently deaerated in a short time. In addition, the amount of fine bubbles generated in the filtration chamber 14 can be reduced, and the time required for normal operation of the pump unit 4 can be shortened.
Furthermore, according to the filter 1 according to the first embodiment of the present invention, the expiratory hole 62 is provided in the central portion of the upper surface of the intermediate unit 6, and the diameter of this hole can be set to about 20 mm. For this reason, air remaining in the pump chamber 46 or the like can be surely and efficiently deaerated during the exhalation operation regardless of the properties (surface tension, viscosity, etc.) of any raw water, such as a surfactant. Even when another liquid having a relatively large surface tension compared to the plating solution contained in is used as raw water, it can be surely and efficiently deaerated.
Moreover, according to the filter 1 by 1st Embodiment of this invention, since the material of the valve body 64 used that the specific gravity becomes below the specific gravity of raw | natural water, the valve body 64 is raw | natural water at the time of exhalation operation. As a result, the exhalation hole 62 can be opened with certainty only by the buoyancy caused by the valve body 64. Further, when the pump unit 4 is operated, the valve body 64 is caused by the suction force generated in the raw water suction passage 50 and the raw water suction chamber 63. The expiratory hole 62 can be surely lowered and contacted with the O-ring 68 around the expiratory hole 62 to securely seal the expelled hole 62. As a result, the structure of the valve body 64 can be simplified, a reliable valve mechanism can be realized, the deaeration function during the exhalation operation can be improved, and the deterioration of the pump function during the filter operation can be prevented. it can.
Furthermore, according to the filter 1 by 1st Embodiment of this invention, since the elastic members, such as the coil spring 16, are provided inside the lid member 10, when the full length of the filter medium 12 shrink | contracts by the heat cycle of raw | natural water However, the upper and lower parts of the filter medium 12 can always be reliably sealed by the elastic action of this elastic member, and the raw water around the filter medium 12 and the filtrate in the filter medium hollow portion 12c are completely prevented from being mixed. Can do.
Moreover, according to the filter 1 by 1st Embodiment of this invention, the several filtration chamber inflow port 70 was arrange | positioned axisymmetrically on the upper surface of the rectification chamber 54, and the uniformity of the filtration effect | action in the filtration chamber 14 is carried out. Can be improved.

Next, FIG. 7 is a schematic front view similar to FIG. 1 showing a filter according to the second embodiment of the present invention, and FIG. 8 is a view of B of the filter according to the second embodiment of the present invention shown in FIG. It is -B sectional drawing. 9 and 10 are a plan view and a bottom view showing an intermediate unit of the filter according to the second embodiment of the present invention.
Here, in FIG. 7 to FIG. 10, the same parts as those in the filter 1 according to the first embodiment of the present invention shown in FIG. 1 to FIG.
As shown in FIGS. 7 to 10, in the filter 100 according to the second embodiment of the present invention, a plurality (four) of filter media 12 are used, and the position of the expiratory hole 162 provided in the intermediate unit 106 is used. However, it differs from the structure of the filter 1 by 1st Embodiment mentioned above.
The upper ends of the plurality of filter media 12 held in the cylinder housing 108 of the filter unit 102 are securely sealed by an elastic member such as a coil spring 16 provided inside the lid member 110, as in the first embodiment. ing.

The intermediate unit 106 includes a raw water suction passage 150, and the raw water suction passage 150 communicates with the pump chamber inlet 48 through a raw water suction chamber 163 formed at the center of the intermediate unit 106. An expiratory hole 162 is formed on the upper surface of the raw water suction path 150, and the expiratory hole 162 allows a part of the raw water suction path 150 to be connected to the filtration chamber 114 (outside the plurality of filter media 12) in the cylinder housing 108. It comes to communicate. In addition, a valve body 64 is provided in the expiratory hole 162. The valve body 64 opens the expelling hole 162 when a priming operation is performed, and closes the expelling hole 162 when the filter is operated.
Here, the diameter of the expiratory hole 162 is about 14 mm from the viewpoint of structural space and production cost in order to surely and efficiently evacuate the remaining air regardless of the nature of the raw water having any surface tension. It is preferably set to about 25 mm, and most preferably about 20 mm.
Furthermore, on the upper surface of the rectifying chamber 54 of the intermediate unit 106, at least four or more filtration chamber inlets 170 are formed symmetrically about the raw water suction chamber 163 of the intermediate unit 106. The raw water is rectified from the vortex chamber 52 of the casing 42 through the rectifying chamber 54, then sent from the plurality of filtration chamber inlets 170 into the filtration chamber 114, and filtered through the plurality of filter media 12. It has become.
In addition, a filtrate delivery path 172 is disposed in the intermediate unit 106 so as to be substantially perpendicular to the raw water suction path 150, and the upstream end of the filtrate delivery path 172 is a hollow portion 12 c of each filter medium 12. Is connected to a filtrate delivery port 174 located at the lower end. The filtrate in the hollow portion 12 c of the filter medium 12 that has passed through the filter medium 12 flows from the filtrate delivery port 174 through the filtrate delivery path 172 and is sent out of the filter 100.

FIGS. 11 and 12 are enlarged cross-sectional views of the intermediate unit portion of the filter according to the second embodiment of the present invention shown in FIG. 8 during the expiration operation and the filter operation, respectively.
Hereinafter, with reference to FIG.11 and FIG.12, operation | movement (action) of the filter 100 by 2nd Embodiment of this invention is demonstrated.
First, in the filter 100 at the time of the exhalation operation, raw water is poured from above into the filtration chamber 114 of the cylinder housing 108 opened by removing the lid member 110. The raw water in the filtration chamber 114 flows into the pump chamber 46 from the filtration chamber inlet 170 through the rectifying chamber 54, the vortex chamber outlet 52b, and the vortex chamber inlet 52a.
The raw water flowing into the pump chamber 46 is filled in the pump chamber 46, and then flows from the pump inlet 48 into the raw water suction passage 150 through the raw water suction chamber 163. At this time, the valve body 64 provided in the raw | natural water suction path 150 raises by the buoyancy by raw | natural water, and the exhalation hole 162 is open | released (refer FIG. 11). The air remaining in the raw water suction passage 150 and the pump chamber 46 passes through the open expiratory hole 162 and escapes upward toward the filtration chamber 114 (outside the plurality of filter media 12) in the cylinder housing 108. Eventually, the air degassed from the raw water suction passage 150 and the pump chamber 46 is discharged to the outside of the filter 100, and the entire flow path of the filter 100 is filled with the raw water.

On the other hand, in the filter 100 during the filtration operation, the raw water in the raw water suction passage 150 is sucked into the pump chamber 46 from the raw water suction chamber 163 through the pump chamber inlet 48 by the operation of the pump unit 4. At this time, a suction force is generated in the raw water suction passage 150, and the suction force lowers the valve body 64 and comes into contact with the O-ring 68 around the expiratory hole 162, so that the expiratory hole 162 is sealed. (See FIG. 12).
The raw water accommodated in the pump chamber 46 flows into the vortex chamber 52 from the vortex chamber inlet 52 a of the casing 42, and rises toward the vortex chamber outlet 52 b while flowing in the vortex chamber 52. The raw water rising while flowing in the vortex chamber 52 exits the vortex chamber outlet 52b and flows to the rectifying chamber 54, and becomes rectified raw water.
The raw water rectified in the rectification chamber 54 is dispersed and uniformly flows into the filtration chamber 114 from the plurality of filtration chamber inlets 170 provided on the upper surface of the rectification chamber 54, and the filter medium 12 provided in the filtration chamber 114. Is uniformly supplied to the outer peripheral surface 12a. The raw water supplied into the filtration chamber 114 passes from the outer peripheral surface 12 a of the filter medium 12 to the inner peripheral surface 12 b to become filtrate, and this filtrate is filtered from the hollow portion 12 c of the filter medium 12 to the filtrate outlet 174. Then, it flows to the filtrate delivery path 172 and is sent to the outside of the filter 1.

  In the filter 100 according to the above-described second embodiment of the present invention, the expiratory hole is such that a part of the raw water suction passage 150 communicates with the outside of the plurality of filter media 12 (the raw water side of the filter media) in the cylinder housing 108. 162 is arranged. For this reason, in addition to the effect of the filter 1 by 1st Embodiment demonstrated previously, at the time of filter operation, the exhalation hole 162 cannot be closed by the malfunction of the valve body 64 by any chance, and the raw | natural water suction path 150 of Even if the raw water passes through the exhalation hole 162, it does not flow into the outside of the filter medium 12 (the raw water side of the filter medium) and mix with the filtrate in the filter medium hollow portion 12c.

In addition, in the filter 100 by 2nd Embodiment of this invention mentioned above, about the several filter media 12, although the case where the 4 filter media 12 was used was demonstrated as an example, it is not limited to this number, Other The number can also be applied.
Furthermore, in the filter 100 of this embodiment, the raw water suction path 150 and the filtrate delivery path 172 provided in the intermediate unit 106 are arranged so as to be substantially perpendicular to each other. It is not limited, You may arrange | position so that a mutual flow path may make an arbitrary angle with the use and use conditions of the filter 100. FIG. For example, the raw water suction path 150 and the filtrate delivery path 172 may be arranged so as to be parallel to each other like the raw water suction path 50 and the filtrate delivery path 72 of the filter 1 according to the first embodiment described above. However, they may be arranged so that each other forms an acute angle, an obtuse angle, or 180 °.

It is a schematic front view which shows the filter by 1st Embodiment of this invention. It is AA sectional drawing of the filter by 1st Embodiment of this invention shown in FIG. It is a top view which shows the intermediate unit of the filter by 1st Embodiment of this invention. It is a bottom view which shows the intermediate unit of the filter by 1st Embodiment of this invention. It is an expanded sectional view at the time of exhalation operation in the intermediate unit part of the filter by 1st Embodiment of this invention shown in FIG. FIG. 6 is an enlarged cross-sectional view similar to FIG. 5 during filter operation in the intermediate unit portion of the filter according to the first embodiment of the present invention shown in FIG. 2. It is a schematic front view which shows the filter by 2nd Embodiment of this invention. It is BB sectional drawing of the filter by 2nd Embodiment of this invention shown in FIG. It is a top view which shows the intermediate unit of the filter by 2nd Embodiment of this invention. It is a bottom view which shows the intermediate unit of the filter by 2nd Embodiment of this invention. It is an expanded sectional view at the time of exhalation operation in the intermediate unit part of the filter by 2nd Embodiment of this invention shown in FIG. It is an expanded sectional view similar to FIG. 11 at the time of filter operation in the intermediate unit part of the filter by 2nd Embodiment of this invention shown in FIG. It is the schematic which a part of conventional filter cut away. It is sectional drawing by line CC in the pump of the conventional filter shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100 Filter 2,102 Filter unit 4 Pump unit 6,106 Intermediate unit 8,108 Cylinder housing 10,110 Lid member 12 Filter medium 12a Filter medium outer peripheral surface 12b Filter medium inner peripheral surface 12c Filter medium hollow part 12d Filter medium upper end part 14,114 Filtration chamber 16 Coil spring 18 Base housing 20 Drive motor 20a Drive shaft 22 Cooling fan 24 Cooling air inlet 26 Cooling air outlet 28 Drive rotor 30 and 36 Magnet 32 Base housing cylindrical recess 34 Impeller 38 Fixed shaft 40 Cylindrical recess flange portion 42 Casing 44, 68 O-ring 46 Pump chamber 48 Pump chamber inlet 50, 150 Raw water suction passage 50a Raw water suction passage outlet 52 Vortex chamber 52a Vortex chamber inlet 52b Vortex chamber outlet 54 Rectification chamber 56 Cylinder housing holding Projection 58 filter medium holding inner protrusions 60 filter medium holding outer protrusions 62 and 162 priming hole 63 the raw water suction chamber 64 the valve body 66 stop 70, 170 filtering chamber inlet 72, 172 filtrate delivery path 74,174 filtrate outlet

Claims (6)

A filtration unit having a filtration unit for filtering raw water, and a pumping unit for feeding the raw water to the filtration unit and feeding the filtrate filtered by the filtration unit to the outside of the filtration unit,
The filtration unit has a filter medium and a filter medium holding member that holds the filter medium,
The pumping unit is provided below the filtering unit, and a raw water suction passage for sucking raw water into the pumping unit, a pumping chamber for sucking raw water from the raw water suction passage, An impeller that rotates around a directional axis, a raw water raising means that raises the raw water pumped from the pumping chamber by the rotation of the impeller and flows into the filtration unit, and filtrate from the filtration unit to the outside of the pumping unit. A filtrate delivery path for delivery;
The raw water suction path is provided with a priming hole communicating with the filtration unit. The priming hole opens the priming hole when priming the pumping unit, and the priming water when the pumping unit is in operation. A filter comprising a valve body for closing a water hole.   The filter according to claim 1, wherein the specific gravity of the valve body is equal to or lower than the specific gravity of the raw water.   The filter according to claim 1 or 2, wherein the raw water suction path communicates with the raw water side in the filtration unit through the expiratory hole.   The filter according to claim 1 or 2, wherein the raw water suction path communicates with the filtrate side in the filtration section through the exhalation hole.   The filter according to any one of claims 1 to 4, wherein the diameter of the expiratory hole is about 14 mm to about 25 mm.   The filter according to any one of claims 1 to 5, wherein the filter medium holding member includes an elastic member that seals an end of the filter medium.

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