JP2013237030A - Filter for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter for liquid which can easily discharge the liquid collected in the inner part of a filter unit by filtration operation.SOLUTION: A filter for liquid includes: a frame 11 having a vertical part TB and a horizontal part HB; a filter unit group 12 which has a filter case 42 containing a filter unit 31-34 and a connection block 43, and is installed to the frame by pipe connection of the connection block 43; a flowing-in hose 13 and a flowing-out hose 14, wherein the frame can change its position to a using position having the vertical part in a nearly vertical state and an after-treatment position having the vertical part in a nearly horizontal state, and each filter unit is installed to the vertical part such that in the using position the filter case extends diagonally downward starting from the connection block and also in the after-treatment position the filter case extends diagonally upward starting from the connection block.

Description

  The present invention relates to a filtering device for filtering oil such as hydraulic oil, cutting oil, insulating oil, and other liquids.

  2. Description of the Related Art Conventionally, hydraulic devices are used in various industrial machine devices, and they are provided with a hydraulic unit for supplying pressure oil as hydraulic oil to a hydraulic cylinder or the like. The hydraulic unit has a hydraulic tank for storing pressure oil.

  Since the hydraulic oil becomes dirty with use, it is necessary to perform maintenance such as removing impurities by periodically filtering the hydraulic oil.

  Usually, maintenance of such hydraulic oil is carried out by a worker carrying a filtration device at a site where a hydraulic unit or the like is installed, and performing the filtration work at that site. Therefore, portability is important for the filtration device used for this.

  2. Description of the Related Art Conventionally, there has been proposed a filtering device that is small in size so that it can be mounted on a service car and that can exchange a filter (Patent Document 1).

  According to the apparatus of Patent Document 1, a U-shaped frame made of a pipe is fixed on a pedestal by welding, and a caster is attached to the lower surface of the frame. The frame is made low for convenient hand movement. A plurality of filters and pumps composed of paper filters are arranged on the pedestal, and a suction pipe and a discharge pipe are connected to these filters.

  When using this filtration device, carry the filtration device to a site where a liquid tank such as a hydraulic tank is installed, where the suction pipe and the discharge pipe are connected to the liquid tank, and the pump is operated to operate the hydraulic oil, etc. Circulate the liquid. While the liquid circulates, the liquid is filtered by the filter and cleaned.

  In addition, there has been proposed a mobile filtration device in which a pump and a filter are arranged inside a box equipped with casters (Patent Document 2).

JP-A-10-99613 JP 2000-288318 A

  In the conventional filtration device described above, when the pump is stopped and the filtration operation is completed, the suction pipe and the discharge pipe are removed from the liquid tank, and the filtration device is moved to another site or standby place.

  However, in the prior art, the suction pipe and the discharge pipe are removed from the liquid tank as soon as the filtration operation is completed, so that the liquid in the liquid tank remains inside the filter device, particularly in the filter (filter unit). The liquid in the tank will be reduced accordingly.

  Accordingly, the liquid in the liquid tank decreases each time maintenance is performed by the filtration device, so that it is necessary to perform a liquid replenishing operation, which requires labor and extra liquid. Further, since the liquid remaining in the filtration device is discarded later, resources are wasted accordingly.

  Also, with conventional filtration devices, it is not easy to drain the liquid remaining in the filtration device and return it to the liquid tank, and there is often not enough work space especially on the site where maintenance is performed. At present, no liquid is discharged.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a filtration device that can easily discharge a liquid accumulated in a filter unit by a filtration operation.

  A filtering device according to an embodiment of the present invention includes a frame having a vertical portion and a horizontal portion extending substantially perpendicular to the vertical portion at a lower end portion of the vertical portion, a filter case containing a filter element, and an inflow port And a plurality of filter units attached to the vertical portion of the frame by pipe connection of the connection block, the connection block being disposed at one end of the filter case. A filter unit group, and an inflow port and an outflow port that are fluidly connected to the filter unit group to allow liquid to flow in or out, and the frame has a substantially vertical state in the vertical portion. The posture can be changed between the usage posture and the post-processing posture where the vertical part is almost horizontal. In each of the filter units, the filter case extends obliquely downward from the connection block in the use posture, and the filter case is obliquely upward from the connection block in the post-processing posture. It is attached with respect to the said vertical part so that it may extend.

  According to the present invention, the liquid accumulated in the filter unit by the filtering operation can be easily discharged.

It is a side view of the filtration apparatus of this embodiment. It is a front view of the filtration apparatus of FIG. It is a figure which shows the state which fell the filtration apparatus of FIG. 1 to the post-processing attitude | position. It is a figure for demonstrating other embodiment of a filtration apparatus. It is a figure for demonstrating other embodiment of a filtration apparatus. It is a front view which shows embodiment of the filtration apparatus provided with the pump apparatus. It is the front view and side view of a pump apparatus. It is sectional drawing which looked at the attachment part of the filtration apparatus from the side surface direction. It is sectional drawing which looked at the attachment part of the filtration apparatus from the front direction. It is an example of the fluid circuit diagram of a filtration apparatus.

[Outline of features of filtration device]
The filtering device according to this embodiment is characterized by a frame having a vertical portion and a horizontal portion extending substantially perpendicular to the vertical portion at the lower end of the vertical portion, a filter case containing the filter element, an inflow port, and an outflow A filter unit group comprising a plurality of filter units, each having a connection block disposed at one end of the filter case and provided with a port, and being attached to a vertical portion of the frame by pipe connection. An inlet and an outlet that are fluidly connected to the filter unit group to allow liquid to flow in or out, and the frame has a use posture in which the vertical portion is substantially vertical, and the vertical portion is substantially horizontal. It is possible to change the posture to the post-processing posture that is in the state, and each filter unit As filter case extends diagonally downward starting from the connection block in use position, and as the filter case is in the post-processing position extending obliquely upward starting from the connection block, comprising attached to the vertical portion.

  Preferably, the frame is provided with a caster in the vicinity of the lower end portion of the vertical portion, and a handle is provided at the upper end portion of the vertical portion. In the use posture, the horizontal portion and the caster are in contact with the floor surface so that the frame is The posture can be maintained, and in the post-processing posture, the frame can maintain the posture by the vertical portion and the caster coming into contact with the floor surface.

  The frame is composed of a pipe at least a part of which is connected to the inflow port and the outflow port to form a liquid flow path.

  Each filter unit is attached so that the angle formed by the axis and the vertical portion is within a range of 30 to 60 degrees.

  The filter unit group is formed by connecting two filter units in parallel. The filter unit group has two parallel connection bodies in which two filter units are connected in parallel, and the two parallel connection bodies are connected in series.

  The frame is provided with an attachment portion for detachably attaching a pump device including a motor and a pump.

Hereinafter, the filtration apparatus 1 of embodiment of this invention is demonstrated with reference to FIGS. 1 is a left side view in FIG. 2, and FIG. 8 is a cross-sectional view taken along line AA in FIG. 4 and 5 show the structure of the filtration device in a simplified manner. FIGS. 4 (A), (B) and 5 (A) are front views, and FIGS. 4 (C) and 5 (B) are views. It is a side view.
[Configuration of Filtration Device 1 of Embodiment]
As shown in FIGS. 1 and 2, the filtering device 1 includes a frame 11, a filter unit group 12, an inflow hose 13, an outflow hose 14, and attachment portions 15 (15 a and 15 b).

  The frame 11 is mainly made of a metal pipe. The frame 11 is formed by joining straight pipes and pipes that are smoothly bent at right angles or obtuse angles using pipe joints or the like.

  The frame 11 includes a main body 21, a stand 22 connected so as to extend in a direction perpendicular to the main body 21 below the main body 21, and an oblique direction with respect to the main body 21 above the main body 21. The handle portion 23 and the like are connected so as to extend.

  In the present embodiment, the main body portion 21 has two straight portions 21 a and 21 b arranged on the left and right sides of the frame 11. One straight portion 21a is formed by connecting a tee 211a, a pipe member 212a, a tee 213a, a pipe member 214a, and a tee 215a in this order. The other straight portion 21b is formed by connecting a tee 211b, a pipe member 212b, a tee 213b, a pipe member 214b, and a tee 215b in this order by screws or welding. Each of these linear portions 21a and 21b is capable of circulating a liquid inside.

  In the present embodiment, the stand portion 22 includes the left and right straight portions 221a and 221b, the left and right horizontal portions 222a and 222b extending in the direction perpendicular to the straight portions 221a and 221b, and the tip portions of the horizontal portions 222a and 222b. It has a horizontal straight line part 223 to be connected.

  The stand portion 22 is formed by bending a single pipe and is hollow inside, but is closed by plugs at both ends thereof, and no liquid enters the inside.

  In the present embodiment, the handle portion 23 includes the left and right straight portions 231a and 231b, the left and right oblique portions 232a and 232b, and the horizontal portions 232a and 232b that extend in an oblique direction with respect to the straight portions 231a and 231b. It has a horizontal straight line part 233 to be connected.

  The handle portion 23 is formed by bending a single pipe and is hollow inside, but is closed by plugs at both ends thereof, and liquid does not enter the inside.

  In the frame 11, a vertical portion TB is constituted by a part of the main body portion 21, the handle portion 23 and the stand portion 22, and a horizontal portion HB is constituted by another portion of the stand portion 22. The horizontal portion HB extends substantially perpendicularly to the vertical portion TB at the lower end of the vertical portion TB.

  In the frame 11, two casters 16 are provided in the vicinity of the lower end portion of the vertical portion TB, specifically, at the connection portion between the straight portions 221a and 221b of the stand portion 22 and the horizontal portions 222a and 222b.

  The frame 11 includes a use posture SS (the state shown in FIG. 1) in which the filtration device 1 is used for filtration, and a post-treatment posture for allowing the liquid in the filtration device 1 to flow out and return to the original state after the filtration is finished. The posture can be changed to AS (the state shown in FIG. 3).

  In the use posture SS, the horizontal portion HB and the casters 16 are in contact with the floor surface FL, so that the frame 11 can maintain the posture. In the post-processing posture AS, the vertical portion TB and the caster 16 are in contact with the floor surface FL, so that the frame 11 can maintain the posture.

  In addition, since the caster 16 is directly attached to the stand part 22 and has no extra projections, the caster 16 is less likely to interfere with surrounding objects during the movement of the filtration device 1 and easily moves to a narrow place. be able to.

  An inflow hose 13 is piped to the tee 213a of the frame 11, and an outflow hose 14 is piped to the tee 213b.

  A bar 24 is attached to the frame 11, and rests 25 a and 25 b are attached to the bar 24 at the lower left and right sides thereof. Further, hose hangers 26 a and 26 b are attached to the left and right upper sides of the bar 24, and hose hangers 26 c and d are attached to the left and right of the stand portion 22, respectively.

  Further, the filter unit group 12 is attached to the tees 211a, b, 215a, b of the frame 11 by pipe connection.

  That is, the straight portions 21a and 21b are fluidly connected to the filter unit group 12, the inflow hose 13, and the outflow hose 14 to form a liquid flow path. Thus, since a part of the frame 11 constitutes a part of the flow path through which the liquid flows, the use of the piping material is reduced and the weight is reduced.

  The filter unit group 12 includes four filter units 31, 32, 33, and 34 in the present embodiment.

  The filter unit group 12 has two parallel connection bodies in which two filter units are connected in parallel, and the two parallel connection bodies are connected in series. That is, the two filter units 31 and 32 and the other two filter units 33 and 34 are of the same mesh, and each constitutes a parallel connection. And the filter units 31 and 32 and the filter units 33 and 34 which are parallel connection bodies are mutually connected in series, and comprise a series connection body.

  In the present embodiment, the mesh of the first-stage filter units 31 and 32 is 10 μm, and the mesh of the second-stage filter units 33 and 34 is 3 μm.

  Thus, by connecting the filter units 31, 32 and 33, 34 of the same mesh in parallel, the weight is reduced as compared with the case of using one large filter unit. That is, in general, when one filter unit is used and a parallel connection body of two filter units capable of obtaining the same flow rate (filtration area), the latter is lighter. In this embodiment, without using a large filter unit, in order to obtain the same flow rate as that, it is divided into two to make a parallel connection body of small filter units, thereby reducing the weight.

  Each of the filter units 31 to 34 includes a filter case 42 in which the filter element 41 is accommodated, and a connection block 43 provided with an inflow port PN and an outflow port PS so as to close one end of the filter case 42. With. That is, an inflow port PN and an outflow port PS are provided at both ends of the connection block 43. By connecting piping members to the inflow port PN and the outflow port PS, the filter units 31 to 34 are connected. It is attached to the tees 211a, b, 215a, b of the frame 11 and is fluidly connected.

  In the embodiment shown in FIG. 2, the filter units 31, 33 and 32, 34 are connected in series, and the filter units 31, 32 and 33, 34 are connected in parallel by the shunt pipe 35.

  The filter units 31 to 34 are attached to each other in the same posture and obliquely with respect to the frame 11.

  That is, each filter unit 31 to 34 is shown in FIG. 3 in the post-processing posture so that the filter case 42 extends obliquely downward from the connection block 43 as shown in FIG. The filter case 42 is attached so as to extend obliquely upward from the connection block 43 as a starting point.

  In the present embodiment, each filter unit 31 to 34 has an angle α of 45 degrees between the axis and the vertical portion TB (particularly, the straight portions 21a and 21b). In addition, what is necessary is just to attach this angle (alpha), for example in the range of about 30-60 degrees, even if it is not 45 degrees.

  By attaching the filter units 31 to 34 in an oblique direction, the filter case 42 is located below the connection block 43 in the use posture SS, so that the liquid flows into the filter case 42 and fills it. 34 can be used in the most efficient state. Further, in the post-processing posture AS, the filter case 42 is above the connection block 43, so that the liquid in the filter case 42 flows out by its own weight, and after a while, the liquid in the filter case 42 almost flows out and becomes empty. Become.

  Further, when the filtration of the liquid ML is finished, the pump PE sends out air by pulling out the inflow hose 53 (see FIG. 10) from the liquid tank ET. Due to the pressure of the air sent out in this way, the liquid ML accumulated not only in the filter units 31 to 34 in the post-processing posture AS but also in the straight portions 21a and 21b and other pipes is discharged from the outflow hose 14. Is done. When most of the liquid ML in the filtration device 1 is discharged, the motor M may be stopped.

  That is, in this way, by setting the filtering device 1 to the post-processing posture AS after finishing the filtration, it is possible to return the liquid in the filter case 42 to the liquid tank that has been filtered. At that time, the liquid in the pipe of the filtration device 1 can also be returned to the liquid tank. In this case, in order to discharge the liquid ML with its own weight as much as possible, it is preferable to place the filtering device 1 at a position higher than the liquid level of the liquid tank.

  One end of the inflow hose 13 is connected to the tee 213a as described above, is wound and held using the hose hangers 26a to 26d, and the inlet 13b at the other end is temporarily connected to the rest 25a and held. Has been.

  An inflow port 13b such as a coupler, a nipple, and other pipe members is provided at the tip of the inflow hose 13.

  The outflow hose 14 is connected to the tee 213b at one end as described above, and is wound and held using the hose hangers 26a to 26d, and the outflow port 14b at the other end is temporarily connected to the rest 25b and held. Has been.

  An outflow port 14b such as a coupler, a nipple, and other pipe members is provided at the tip of the outflow hose 14.

  When the inflow hose 13 and the outflow hose 14 are used, the inflow port 13b and the outflow port 14b are removed from the rests 25a and 25b and connected to the pump PE or the liquid tank ET.

  Since the inflow hose 13 and the outflow hose 14 are wound around the hose hangers 26a to 26d and held by the rests 25a and 25b when not in use, the liquid may unexpectedly flow out even when the liquid remains inside. Is prevented.

  Moreover, the stand part 22 of the flame | frame 11 is provided with attachment part 15a, 15b for attaching the pump apparatus 17 so that attachment or detachment is possible on either side. The pump device 17 will be described later.

  A fluid circuit diagram of the filtration device 1 described above is shown in FIG.

  In FIG. 10, the inflow hose 13 is connected to the outflow port 52a of the pump device 17, and the outflow hose 14 is connected to return the liquid ML to the liquid tank ET. An inflow hose 53 that is an inlet of the pump device 17 is connected so as to be immersed in the liquid ML of the liquid tank ET.

  When the pump PE rotates by driving the motor M with the filtering device 1 in the use posture SS, the liquid ML in the liquid tank ET is sucked out via the inflow hose 53, and the filter unit of the filtering device 1 After being filtered through the group 12, it returns to the liquid tank ET via the outflow hose 14.

  By operating the filtration device 1 for an appropriate time, the liquid ML in the liquid tank ET is filtered to remove impurities and the like.

  After finishing the filtration of the liquid ML, the filter case 1 of each of the filter units 31 to 34 is placed in a post-processing posture AS and a position higher than the liquid level of the liquid ML in the liquid tank ET, The liquid ML accumulated in the straight portions 21a and 21b, the inflow hose 13, the outflow hose 14, and other piping members can be easily discharged and returned to the liquid tank ET.

  The posture change between the use posture SS and the post-processing posture AS is extremely easy because the operator can hold the handle portion 23 and rotate the frame 11 around the caster 16 in the direction of tilting.

  Since the frame 11 of the filtration device 1 is constituted by a pipe or the like and also serves as a piping member, the whole is lightweight. Further, since the filter units 31, 32 and 33, 34 of the same mesh pair are used in parallel, they are lightweight.

Thus, since the weight reduction of the filtration apparatus 1 is achieved, it is easy to move, and it is easy to carry in and out from the site where the liquid tank ET is installed.
[Other Embodiments of Filtration Apparatus]
Next, filtration devices 1B to 1D of other embodiments will be described.

  In the filtration device 1B shown in FIGS. 4A and 4C, two filter units 33 and 34 are provided in parallel connection. That is, the filtration device 1B is a one-stage filter. Instead of omitting the filter units 31 and 32 in the filtration device 1b, a rough mesh prefilter 51B is provided on the suction side of the pump PE in the pump device 17.

  In the filter device 1C shown in FIG. 4B, two sets of two filter units 31, 32 and 33, 34 connected in parallel are connected in series. That is, the filtration device 1C is a two-stage filter, and has the same configuration as the filtration device 1 shown in FIGS.

  In the filtration device 1C, the pump device 17 is provided with a very coarse mesh prefilter 51C on the suction side of the pump PE.

  In the filtration device 1D shown in FIGS. 5A and 5B, the straight portions 21Da and 21Db are fluidly partitioned in the middle. Between the straight portion 21Da and the straight portion 21Db, the first-stage filter units 31 and 32 and the second-stage filters 33 and 34 are connected to each of the partitioned sides.

  Then, connection ports 216a to 216d are provided on both divided sides, and the inflow hose 13, the outflow hose 14, and the intermediate hoses 54 and 55 are connected to the connection ports 216a, b, c, and d.

  In the filtering device 1D, the liquid ML flowing from the inflow hose 13 is filtered by the filter units 31 and 32, passes through the intermediate hose 54, the pump PE, and the intermediate hose 55, and is further filtered by the filter units 33 and 34.

  That is, the filtration device 1D is also a two-stage filter, similar to the filtration device 1 and the filtration device 1C.

Also in these filtration devices 1B to 1D, the use posture SS shown in FIGS. 4 and 5 and the vertical portion TB and the caster 16 are in contact with the floor surface FL, so that the frame 11 can maintain the posture. is there.
[Pump device]
Next, the pump device 17 and the attachment portion 15 will be described.

  FIG. 6 shows the filtration device 1 including the pump device 17, FIG. 7 shows a front view and a side view of the pump device 17, and FIGS. 8 and 9 show the attachment portion 15.

  As shown in FIG. 6, the pump device 17 is attached to the filtration device 1 using two attachment portions 15 a and 15 b.

  In FIG. 7, in the pump device 17, a motor M and a pump PE directly connected to the motor M are arranged inside a case 61. Sockets 52a and 52b for connecting the inflow hose 13 or 53 are attached to the outlet and the inlet of the pump PE. A handle 62 and a control unit 63 are attached to the upper part of the case 61.

  Plate-like brackets 64 a and 64 b made of metal or the like for attaching the pump device 17 to the attachment portion 15 are attached to the outside on both sides of the case 61.

  The mounting portions 15a and 15b will be described. Since these are symmetrical structures, only one of them will be described.

  Referring also to FIGS. 8 and 9, the attachment portion 15 b is attached to the stand portion 22 by fastening the two gripping blocks 71 and 72 with bolts while sandwiching the straight portion 221 b of the stand portion 22. . A mounting block 73 is further fixed to the grip block 72 with bolts.

  A fixed block 74 is provided on the mounting block 73 so as to be movable in the contact / separation direction with respect to the mounting block 73 at a position facing the mounting block 73. The movable range of the fixed block 74 is regulated by shaft bolts 75 a and 75 b screwed into the mounting block 73.

  Further, a clamping bolt 76 is provided through the gripping blocks 71 and 72, the mounting block 73, and the fixing block 74. The clamping bolt 76 is rotated by the knob 76a to draw the fixing block 74 toward the mounting block 73. Can be done. A compression spring 77 is attached to the outer periphery of the tightening bolt 76 to bias the grip block 72 and the fixed block 74 in a direction to separate them.

  The fixed block 74 is provided with a convex portion 74 a that protrudes toward the mounting block 73 on a part of the side surface.

  The bracket 64b of the pump device 17 is provided with two engaging portions 641 and 642 at the leading edge thereof, and a locking recess 643 is formed between the engaging portions 641 and 642.

  With the knob 76a loosened and the mounting block 73 and the fixed block 74 spaced apart, the brackets 64a and 64b are inserted therebetween, and the two engaging portions 641 and 642 are hooked on the shaft bolts 75a and 75b. In this state, when the knob 76a is tightened and the fixing block 74 is pulled toward the mounting block 73, the convex portion 74a fits into the locking concave portion 643, and the brackets 64a and 64b do not come out of the mounting portion 15. By firmly tightening the knob 76a, the brackets 64a and 64b are sandwiched and fixed between the mounting block 73 and the fixing block 74.

  Thus, the pump device 17 can be easily attached to and detached from the filtration device 1. Therefore, for example, when the filtration device 1 is carried into the site, the pump device 17 may be removed from the filtration device 1 and lightened, and the pump device 17 may be attached to the filtration device 1 at the site.

  In the embodiment described above, the configuration of the filter unit group 12, the number of filter units, the connection method, the mesh value, and the like can be variously changed in addition to those described above.

  In addition, the structure of each part or the whole of the frame 11, the filter unit group 12, the filter units 31 to 34, the inflow hose 13, the outflow hose 14, the attachment portion 15, the caster 16, the pump device 17, and the filtration devices 1, 1B to 1D, The structure, circuit, shape, number, arrangement, and the like can be changed as appropriate in accordance with the gist of the present invention.

1,1B-1D Filtration device 11 Frame 12 Filter unit group 13 Inflow hose (inlet)
13b Inlet 14 Outlet hose (outlet)
14b Outlet 15 Attachment part 16 Caster 17 Pump device 21 Main body part 21a, 21b Straight line part 22 Stand part 23 Handle part (handle)
41 Filter element 42 Filter case 43 Connection block PE Pump ML Liquid ET Liquid tank TB Vertical portion HB Horizontal portion PN Inflow port PS Outflow port SS Usage posture AS Post-processing posture

Claims (7)

A frame having a vertical portion and a horizontal portion extending substantially perpendicular to the vertical portion at the lower end of the vertical portion;
A filter case containing a filter element; a connection block provided with an inflow port and an outflow port and disposed at one end of the filter case; and the vertical connection of the frame by pipe connection of the connection block A filter unit group consisting of a plurality of filter units attached to the part;
An inlet and an outlet that are fluidly connected to the group of filter units to allow liquid to flow in or out;
The frame can be changed in posture between a use posture in which the vertical portion is substantially vertical and a post-processing posture in which the vertical portion is substantially horizontal.
Each of the filter units has the filter case extending obliquely downward from the connection block in the use posture, and the filter case extends obliquely upward from the connection block in the post-processing posture. So as to be attached to the vertical part,
A liquid filtration apparatus characterized by the above. The frame is provided with a caster in the vicinity of the lower end portion of the vertical portion, and a handle is provided on the upper end portion of the vertical portion,
In the use posture, the horizontal portion and the caster are in contact with the floor surface so that the frame can maintain the posture. In the post-processing posture, the vertical portion and the caster are on the floor surface. It is possible for the frame to maintain its posture by touching,
The liquid filtration apparatus according to claim 1. The frame is composed of a pipe at least a part of which is connected to the inflow port and the outflow port to form a liquid flow path.
The liquid filtration apparatus according to claim 1 or 2. Each of the filter units is attached so that an angle formed between the axis and the vertical portion is within a range of 30 to 60 degrees.
The liquid filtration apparatus according to claim 1.   The liquid filter device according to any one of claims 1 to 4, wherein the filter unit group includes two filter units connected in parallel. The filter unit group has two parallel connection bodies in which the two filter units are connected in parallel, and the two parallel connection bodies are connected in series.
The liquid filtering apparatus according to claim 1. The frame is provided with an attachment portion for detachably attaching a pump device including a motor and a pump.
The liquid filtering apparatus according to claim 1.

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