JP2005061383A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent failure of a fuel system, an engine, etc. by applying a fuel containing no moisture to a filter element.
SOLUTION: A casing 2 having an inflow port 3 and an outflow port 4 for fuel, and interposed between the inflow port 3 and the outflow port 4 in the casing 2 to remove foreign matters such as dust contained in the fuel. In a filter device 1 including a filter element 25 for filtering, a partition wall 8 is provided in the casing 2, and a primary transport system 9 that communicates with the inlet 3 located upstream of the filter element 25 in the casing 2 and downstream. The secondary transport system 10 located on the side is divided into two transport systems. The primary transport system 9 includes a first space 12, a separation storage chamber 16, and a third space 22. Water is separated and stored in the fuel by its own weight in the separation storage chamber 16, and moisture is stored in the filter element 25. Uncontained fuel is guided.
[Selection] Figure 1

Description

  The present invention relates to a filter device that is provided in a fuel system such as a vehicle engine and removes foreign matter such as dust contained in fuel, and in particular, separates moisture contained in fuel in addition to the function of removing foreign matter. The present invention relates to a filter device having a function.

  There are various types of filter devices that are provided in a fuel system such as a vehicle engine and remove foreign matters such as dust contained in the fuel. For example, a casing having an inflow port and an outflow port for fuel, a casing A filter element provided in a filter element is known.

  In the filter device having such a configuration, the inlet is connected to the fuel tank side, the outlet is connected to the fuel pump side, and the fuel is introduced into the casing from the fuel tank through the inlet by the negative pressure from the fuel pump side. Inflow and filter the fuel through the filter element to trap foreign matter such as dust contained in the fuel, guide the fuel not containing dust etc. to the outlet, and from the outlet to the fuel pump side To supply. In this case, moisture contained in the fuel is separated from the fuel by the filter element, dropped onto the bottom of the casing, and discharged to the outside through the drain hole in the bottom of the casing (for example, Patent Document 1, Patent Document). 2, see Patent Document 3).

By the way, in the filter device configured as described above, when high-pressure (high flow) fuel acts on the filter element, the fuel contains water that has been agitated into microdroplets. The water cannot be blocked by the filter element, and the fuel containing the water passes through the filter element and is supplied to the fuel pump, which causes a failure of the fuel system and the engine.
JP 2000-345936 A JP-A-11-270425 Japanese Utility Model Publication No. 6-67858

  The present invention has been made in view of the conventional problems as described above, and even in a high-pressure (high flow rate) fuel, moisture contained in the fuel can be completely separated from the fuel. It is an object of the present invention to provide a filter device that can supply fuel that does not contain moisture to the fuel pump side, and that can prevent the fuel system, engine, and the like from being damaged by the fuel that contains moisture. To do.

  In order to solve the above problems, the present invention employs the following means. That is, the invention according to claim 1 is a casing having an inflow port and an outflow port for fuel, dust that is interposed between the inflow port and the outflow port in the casing, and is included in the fuel. And a filter element that filters out foreign matter in the casing, the water contained in the fuel is separated from the fuel by its own weight and stored in the middle of the primary transport system upstream of the filter element in the casing. A separate storage chamber is provided.

  According to the filter device of the present invention, the fuel flowing into the casing from the inlet is separated by its own weight in the separation storage chamber provided in the middle of the primary transport system on the upstream side of the filter element. The fuel that is not contained is guided to the filter element, passes through the filter element, and is guided to the outlet.

  According to a second aspect of the present invention, in the filter device according to the first aspect, the separation storage chamber is provided at the bottom of the casing.

  According to the filter device of the present invention, the fuel that has flowed into the casing from the inflow port is led into the separation storage chamber at the bottom of the casing, the water is separated and stored by its own weight in the separation storage chamber, and the fuel does not contain moisture. Will be guided to the filter element and will pass through the filter element to the outlet.

  The invention according to claim 3 is the filter device according to claim 1 or 2, wherein the casing includes a primary transportation system located upstream of the filter element by a partition wall, and a downstream side of the filter element. The secondary storage system is partitioned into two, and the separation storage chamber is provided in the middle of the primary transport system.

  According to the filter device of the present invention, the flow rate of fuel flowing into the casing from the inlet is sufficiently reduced when flowing through the primary transport system, so that high pressure (high flow) fuel is applied to the filter element. As in the case of the above, the water in the form of minute water droplets in the fuel does not pass through the filter element. Accordingly, the fuel passing through the filter element does not contain moisture, so that the fuel not containing moisture can be guided to the outlet.

  As described above, according to the filter device of the first aspect of the present invention, the moisture contained in the fuel flowing into the casing from the inlet is in the middle of the primary transport system on the upstream side of the filter element. Since the fuel is separated from the fuel by its own weight and stored in the separation storage chamber provided, the fuel containing no moisture can act on the filter element. Therefore, foreign substances such as dust and water that do not contain moisture can be guided to the outlet through the filter element, and can be supplied from the outlet to the fuel pump side. And the engine will not break down.

  According to the filter device of the second aspect of the present invention, the fuel that has flowed into the casing from the inflow port is guided to the separation storage chamber at the bottom of the casing, and moisture is efficiently separated by its own weight in the separation storage chamber. Will be stored. Accordingly, since fuel that does not contain moisture can act on the filter element, foreign matter such as dust and fuel that does not contain moisture are guided to the outlet through the filter element, and the fuel from the outlet to the fuel pump side. The fuel system and the engine can be prevented from malfunctioning due to moisture contained in the fuel.

  Furthermore, according to the filter device of the third aspect of the present invention, the speed of the fuel flowing into the casing from the inlet is sufficiently reduced when flowing through the primary transportation system. Unlike the case where the fuel of the (flow rate) acts on the filter element, the fine water droplets contained in the fuel will not pass through the filter element. Thus, it can be led to the outlet and supplied from the outlet to the fuel pump side. Therefore, the fuel system and the engine are not affected by the moisture contained in the fuel and are not damaged.

Hereinafter, embodiments of the present invention shown in the drawings will be described.
FIG. 1 shows a first embodiment of a filter device according to the present invention. This filter device 1 is provided in a casing 2 having a fuel inlet 3 and an outlet 4, and in the casing 2. The filter element 25 is provided.

  The casing 2 is formed of a metal, resin, or the like and has a substantially cylindrical shape with the upper and lower ends closed, and an inflow port 3 penetrating the inside and outside of the casing 2 in the vertical direction is integrated with the center of the upper end closing portion 5. The outlet 4 that penetrates the inside and outside of the casing 2 in the horizontal direction is integrally provided at the upper end of the cylindrical portion 7.

  The inflow port 3 has a cylindrical shape formed of metal, resin or the like, and has an upper end protruding upward from the upper surface of the upper end closing part 5 of the casing 2 by a predetermined length, and a lower end part being the upper end closing part 5. A predetermined length protrudes downward from the lower surface. The inflow port 3 may be formed integrally with the upper end closing portion 5 of the casing 2 or may be formed separately and joined together by joining means such as welding or adhesion.

  The outflow port 4 has a cylindrical shape formed of metal, resin, or the like, and the cylindrical shape of the casing 2 protrudes outward from the outer peripheral surface of the cylindrical portion 7 of the casing 2 by a predetermined length. The unit 7 is integrally provided. The outlet 4 may be formed integrally with the cylindrical portion 7 of the casing 2 or may be formed separately and joined together by means such as welding or adhesion.

  A partition wall 8 made of metal, resin, or the like is provided in the casing 2, and the secondary transport system that communicates with the inflow port 3 and the primary transport system 9 that communicates with the inflow port 3 by the partition wall 8. It is divided into 10 two transport systems.

  The partition wall 8 is opposed to the lower wall 14 above the inner wall 11 provided on the center line of the casing 2, the lower wall 14 provided integrally with the lower end portion of the inner wall 11, and the lower wall 14 on the outer peripheral side of the inner wall 11. A filter element 25 is mounted between the upper wall 18 and the lower wall 14.

  The inner wall 11 has a cylindrical shape having a columnar first space 12 on the inner peripheral side, and the inner wall 11 of the casing 2 is formed so that a predetermined gap is formed between the lower end closing portion 6 of the casing 2. It is provided on the center line. The upper end of the inner wall 11 is integrally joined to the peripheral edge of the opening 3 of the inlet 3 of the upper end closing portion 5 of the casing 2 by means of welding, bonding or the like, and this joint is connected to the inner peripheral surface of the upper end of the inner wall 11 and the inlet 3. It is sealed by an annular seal member 13 such as an O-ring or an oil seal interposed between the outer peripheral surface.

  The lower wall 14 has a disk shape in which a through hole 15 penetrating in the vertical direction is provided at the center, and the lower wall 14 is connected to the inner wall 11 with the lower end of the inner wall 11 fitted in the through hole 15. It is integrally provided at the lower end of the inner wall 11 by integrally joining the gaps by means of welding, bonding or the like.

  A first space on the inner peripheral side of the inner wall 11 at the center between the lower surface of the lower wall 14 and the lower end closing portion 6 of the casing 2 and the inner peripheral surface of the cylindrical portion 7 of the casing 2, that is, at the bottom of the casing 2. A column-shaped second space 16 that communicates with the cylinder 12 is formed. The second space 16 separates and stores moisture contained in the fuel flowing into the casing 2 from the inlet 3 by its own weight, and stores it. Is functioning as

  An annular gap 17 penetrating in the vertical direction is formed between the outer peripheral surface of the lower wall 14 and the inner peripheral surface of the cylindrical portion 7 of the casing 2, and an outer peripheral side of a filter element 25 to be described later through this gap 17. The third space 22 and the separation storage chamber 16 communicate with each other.

  The upper wall 18 has a disk shape in which a through hole 19 having a diameter larger than the outer diameter of the inner wall 11 penetrating in the vertical direction is provided in the center portion. The upper wall 18 is formed on the outer peripheral surface and the cylindrical portion 7 of the casing 2. A predetermined gap 20 penetrating in the vertical direction is formed between the inner peripheral surface and the space between the outer peripheral surface of the upper wall 18 and the inner peripheral surface of the cylindrical portion 7 of the casing 2 is sealed in the gap 20. An annular seal member 21 such as an O-ring or an oil seal is interposed. Note that the outer peripheral surface of the upper wall 18 and the inner peripheral surface of the cylindrical portion 7 of the casing 2 may be integrally joined by a joining means such as welding or adhesion.

  A filter element 25 is mounted between the lower surface of the upper wall 18 and the upper surface of the lower wall 14 with the upper and lower ends in close contact with each other. The filter element 25 has a cylindrical shape formed from filter paper, filter cloth, etc., and has an outer diameter that is substantially the same as the outer diameter of the lower wall 14, and an inner diameter of the through hole 19 of the upper wall 18. The diameter is substantially the same as the diameter. A cylindrical third space 22 is formed between the outer peripheral surface of the filter element 25 and the inner peripheral surface of the cylindrical portion 7 of the casing 2, and the third space 22 is a gap 17 on the outer peripheral surface side of the lower wall 14. And the separation storage chamber 16 which is the second space on the lower surface side of the lower wall 14. A cylindrical fourth space 23 is formed between the inner peripheral surface of the filter element 25 and the outer peripheral surface of the inner wall 11, and the fourth space 23 is connected to the upper surface of the upper wall 18 through the through hole 19 of the upper wall 18. It communicates with the fifth space 24 on the side. The fifth space 24 on the upper surface side of the upper wall 18 communicates with the outlet 4.

  The filter element 25 is not particularly limited as long as it can filter and capture foreign matters such as dust contained in the fuel. However, since there is an advantage that a large filtration area can be obtained, the Kikuhana folding type filter The element is valid.

  Then, by providing the partition wall 8 and the filter element 25 in the casing 2 as described above, the inside of the casing 2 is the first space 12 on the inner peripheral side of the inner cylinder 11 and the second space 16 on the lower side of the lower wall 14. And the third space 22 on the outer peripheral side of the filter element 25, the primary transport system 9 located upstream of the filter element 25, the fourth space 23 on the inner peripheral side of the filter element 25, and the upper surface side of the upper wall 18 The second space 16 on the lower surface side of the lower wall 14 is partitioned into two transport systems of the secondary transport system 10 located on the downstream side of the filter element 25 composed of the fifth space 24, as described above. Function as.

  The filter device 1 according to this embodiment configured as described above is located in a fuel system such as a vehicle engine, the inlet 3 is connected to the fuel tank side, the outlet 4 is connected to the fuel pump side, When negative pressure is applied to the fuel pump side, fuel flows into the casing 2 from the fuel tank side via the inlet 3.

  The fuel that has flowed into the casing 2 flows from the top to the bottom through the first space 12 on the inner peripheral side of the inner wall 11 of the primary transport system 9 and flows into the separation storage chamber 16 at the bottom of the casing 2. The water contained in the fuel is separated and stored by its own weight in the separation storage chamber 16 and the flow of the fuel not containing water is changed in the horizontal direction in the separation storage chamber 16 so that the cylindrical portion of the casing 2 7, the flow is changed upward, flows into the third space 22 on the outer peripheral side of the filter element 25, and acts on the outer peripheral side of the filter element 25.

  Then, the filter element 25 passes from the outer peripheral side to the inner peripheral side and flows into the fourth space 23 on the inner peripheral side of the filter element 25. At this time, foreign matters such as dust contained in the fuel are filtered by the filter element 25. The fuel that has been filtered and captured and does not contain foreign matters such as dust flows into the inner fourth space 23. The fuel that has flowed into the fourth space 23 comes into contact with the outer peripheral surface of the inner wall 11 and the flow is changed upward, flows into the fifth space 24 on the upper surface side of the upper wall 18, and flows from the fifth space 24. It is led to the outlet 4 and supplied from the outlet 4 to the fuel pump side.

  In the filter device 1 according to this embodiment configured as described above, the fuel that has flowed into the casing 2 from the inlet 3 is not directly guided to the filter element 25, and the separation storage chamber 16 of the primary transport system 9 is used. Since the water is separated and removed by its own weight and then guided to the filter element 25, fuel containing no water can be applied to the filter element 25. Accordingly, the fuel that has passed through the filter element 25 does not contain moisture, so that the fuel system, the engine, and the like are not affected by the moisture in the fuel so that the fuel system does not break down.

  Further, even if high pressure (high flow rate) fuel flows into the casing 2 from the inlet 3, the speed of the fuel is sufficiently reduced when flowing through the primary transport system 9, so that the water droplets are reduced. The water-containing fuel does not act on the filter element 25, and the water formed into fine water droplets does not pass through the filter element 25. Therefore, foreign matter such as dust and moisture can be completely removed even with high pressure (high flow rate) fuel, so that the fuel system, engine, etc. are not affected and do not break down.

  FIG. 2 shows a second embodiment of the filter device according to the present invention. This filter device 31 is manually operated on the upper part of the casing 2 of the filter device 1 of the first embodiment described above. Since the diaphragm pump 32 is provided and the other configurations are the same as those shown in the first embodiment, the same parts as those shown in the first embodiment are denoted by the same reference numerals. A detailed description thereof will be omitted.

  The diaphragm pump 32 is formed of a casing 33 in which a pump chamber 34 is provided, and an elastic body such as rubber that is disposed in a portion facing the pump chamber 34 so as to cause a volume fluctuation in the pump chamber 34. A diaphragm 46, a pressing member 47 for manually displacing the diaphragm 46, fuel inflow ports 41 and 43 communicating with the inside and outside of the pump chamber 34, and a fuel outflow port 42 communicating with the inside and outside of the pump chamber 34 are provided.

  A partition plate 35 is provided inside the pump chamber 34, and the partition plate 35 divides the inside of the pump chamber 34 into two chambers, an upper chamber 36 and a lower chamber 37, in the vertical direction. A partition plate 38 formed integrally with the casing 33 is provided inside the lower chamber 37, and the interior of the lower chamber 37 is horizontally divided into two chambers, a first lower chamber 39 and a second lower chamber 40, by the partition plate 38. It is divided into.

  A portion of the partition plate 35 corresponding to the first lower chamber 39 is provided with a first communication hole (not shown) that allows the first lower chamber 39 and the upper chamber 36 to communicate with each other. A portion of the partition plate 35 corresponding to 40 is provided with a second communication hole (not shown) that allows the second lower chamber 40 and the upper chamber 36 to communicate with each other.

  A first reed valve 44 that opens and closes the first communication hole is provided at the peripheral portion of the first communication hole on the upper surface side of the partition plate 35, and the peripheral portion of the second communication hole on the lower surface side of the partition plate 35 is A second reed valve 45 for opening and closing the second communication hole is provided, and these reed valves 44 and 45 are driven by displacement of the diaphragm 46 or negative pressure on the fuel pump side.

  A cylindrical first inlet 41 that communicates the inside and outside of the first lower chamber 39 in the horizontal direction is provided integrally with the side portion of the casing 33 corresponding to the first lower chamber 39. The fuel flows into the first lower chamber 39 from the fuel tank side via 41. A cylindrical outlet 42 that communicates the inside and outside of the second lower chamber 40 in the horizontal direction is provided integrally with the side surface portion of the casing 33 corresponding to the second lower chamber 40. Fuel flows out of the casing 33 from the second lower chamber 40.

  A portion adjacent to the partition plate 38 is provided with a second inflow port 43 that communicates the inside and outside of the first lower chamber 39 in the vertical direction. The inside of the first lower chamber 39 is connected to the casing 2 through the second inflow port 43. The fuel flows into the first space 12 on the inner peripheral side of the inner wall 11.

  A diaphragm 46 is provided at the upper end portion of the upper chamber 36 so as to be able to be displaced in the vertical direction while facing the upper chamber 36, and the displacement of the diaphragm 46 can cause a volume variation in the upper chamber 36.

  A slide shaft 48 penetrates the upper end central portion of the casing 33 so as to be movable in the vertical direction, and the upper surface central portion of the diaphragm 46 is integrally connected to the lower end portion of the slide shaft 48. A handle 49 is attached to the upper end of the slide shaft 48 that protrudes upward from the upper end of the casing 33, and the handle 49 and the slide shaft 48 constitute a pressing member 47 that displaces the diaphragm 46.

  A spring 50 is wound around the slide shaft 48, and the diaphragm 46 is constantly urged upward by the urging force of the spring 50, and the pressing member 47 is pressed downward against the urging force of the spring 50. As a result, the diaphragm 46 is displaced downward. Accordingly, by repeatedly displacing the diaphragm 46 downward by the pressing member 47 and upwardly displacing the diaphragm 46 by the biasing force of the spring 50, the diaphragm 46 is displaced in the vertical direction, causing a volume fluctuation in the upper chamber 36. Can be made. Then, the first reed valve 44 and the second reed valve 45 alternately open and close the first communication hole and the second communication hole due to the volume variation, and the fuel is supplied from the first inlet 41 to the first lower chamber 39, The air can flow into the first space 12 on the inner peripheral side of the inner wall 11 of the casing 2 through the first communication hole, the upper chamber 36, the second communication hole, and the second inlet 43.

  And the filter apparatus 31 by this Embodiment is comprised by fitting the upper end part outer peripheral side of the casing 2 by the side of the filter element 25 to the lower end part of the casing 33 of the diaphragm pump 32 comprised as mentioned above.

  The filter device 31 configured as described above is located in a fuel system such as a vehicle engine, the first inlet 41 is connected to the fuel tank side, and the outlet 42 is connected to the fuel pump side. When a negative pressure is applied to the fuel pump side, the fuel flows into the first lower chamber 39 in the casing 33 from the fuel tank side via the first inlet 41.

  The fuel flowing into the first lower chamber 39 flows into the first space 12 through the first communication hole, the upper chamber 36, the second communication hole, and the second inlet 43, and passes through the first space 12. It flows from the top to the bottom and flows into the separation storage chamber 16 that is the second space at the bottom of the casing 2, and the water contained in the fuel is separated and stored by its own weight in the separation storage chamber 16. The fuel that is not contained is changed in flow in the horizontal direction in the separation storage chamber 16 and comes into contact with the inner peripheral surface of the cylindrical portion 7 of the casing 2, and the flow is changed in the upward direction on the outer peripheral side of the filter element 25. It flows into the third space 22 and acts on the outer peripheral side of the filter element 25.

  The filter element 25 passes through the filter element 25 from the outer peripheral side to the inner peripheral side and flows into the fourth space 23 on the inner peripheral side of the filter element 25. At this time, foreign matters such as dust contained in the fuel are filtered by the filter element 25. Then, the fuel that is trapped and does not contain foreign matters such as dust flows into the inner fourth space 23. Then, the fuel that has flowed into the fourth space 23 abuts on the outer peripheral surface of the inner wall 11 and the flow is changed upward, flows from the fourth space 23 into the second lower chamber 40, and within the second lower chamber 40. The flow is changed in the horizontal direction, guided to the outlet 42, and supplied from the outlet 42 to the fuel pump side.

  Even in the filter device 31 according to this embodiment configured as described above, the fuel that has flowed into the casing 2 from the second inlet 43 is directly filtered as in the first embodiment. Since the moisture is separated and removed by its own weight in the separation storage chamber 16 of the primary transport system 9 without being led to the filter element 25, the fuel containing no moisture acts on the filter element 25. Will be able to. Accordingly, the fuel that has passed through the filter element 25 does not contain moisture, so that the fuel system, the engine, and the like are not affected by the moisture in the fuel so that the fuel system does not break down.

  Further, even if high pressure (high flow rate) fuel flows into the casing 2 from the second inlet 43, the speed of the fuel is sufficiently reduced when it flows through the primary transport system 9, so that it is fine. The fuel containing water in the form of water droplets does not act on the filter element 25, and the water in the form of fine water droplets does not pass through the filter element 25. Accordingly, foreign matter such as dust and moisture can be completely removed even with high-pressure (high flow rate) fuel, so that failure of the fuel system and the engine can be prevented.

  Even when the diaphragm 46 is displaced by manually operating the pressing member 47, fuel can be applied to the filter element 25 via the primary transport system 9 as described above. Fuel containing no moisture can be applied to the filter element 25, and the same effect as described above can be obtained.

It is the schematic sectional drawing which showed 1st Embodiment of the filter apparatus by this invention. It is the schematic sectional drawing which showed 2nd Embodiment of the filter apparatus by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filter apparatus 2 Casing 3 Inlet 4 Outlet 8 Bulkhead 9 Primary transport system 10 Secondary transport system 11 Inner wall 12 First space 14 Lower wall 16 Second space (separation storage chamber)
18 Upper wall 22 3rd space 23 4th space 24 5th space 25 Filter element

Claims (3)

  A casing having a fuel inlet and outlet, and a filter element interposed between the inlet and outlet in the casing and filtering foreign matters such as dust contained in the fuel. In the above filter device, a separation storage chamber is provided in the middle of the primary transport system upstream of the filter element in the casing to separate and store moisture contained in the fuel by its own weight. Filter device.   The filter device according to claim 1, wherein the separation storage chamber is provided at a bottom portion of the casing. The casing is partitioned by a partition wall into a primary transportation system located upstream of the filter element and a secondary transportation system located downstream of the filter element, and the separation is performed in the middle of the primary transportation system. The filter device according to claim 1, wherein a storage chamber is provided.

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