CN116291999B

CN116291999B - Exhaust structure, fuel filter and vehicle

Info

Publication number: CN116291999B
Application number: CN202310249853.8A
Authority: CN
Inventors: 尹燕升; 张贵华; 张驰; 周佳成; 董亚洲
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2024-05-24
Anticipated expiration: 2043-03-15
Also published as: CN116291999A

Abstract

The invention belongs to the technical field of vehicles, and discloses an exhaust structure, a fuel filter and a vehicle, wherein the exhaust structure is used for being installed in an oil cavity of a shell, a filtering component divides the oil cavity into an oil inlet cavity and an oil outlet cavity, an upper end cover of the filtering component is provided with an upper end cover opening communicated with the oil inlet cavity, an exhaust pipe of the exhaust structure is provided with a first end connected with the upper end cover and a second end extending towards the oil outlet cavity, and the oil outlet cavity, an inner cavity of the exhaust pipe and the upper end cover opening are communicated in sequence, so that the oil outlet cavity and the oil inlet cavity are communicated to balance the pressure of the oil outlet cavity and the pressure of the oil inlet cavity, and the pressure difference is reduced; the density of the floating ball is smaller than that of the oil, and the second end can be plugged, so that the inner cavity of the exhaust pipe is separated from the oil outlet cavity, the oil outlet cavity is separated from the oil inlet cavity, and the oil in the oil outlet cavity is prevented from being polluted; in addition, as the second end of the exhaust pipe extends towards the oil outlet cavity, the exhaust pipe is applicable to the situation that the pressure difference between the oil inlet cavity and the oil outlet cavity is large, and the liquid level difference between the oil inlet cavity and the oil outlet cavity is large.

Description

Exhaust structure, fuel filter and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to an exhaust structure, a fuel filter and a vehicle.

Background

In the fuel filter, fuel is filtered through a filter element to remove impurities in the fuel. The existing fuel filter generally comprises a shell and a filter element arranged in the shell, wherein oil flows into an oil inlet cavity in the shell from an oil inlet pipeline, enters an oil outlet cavity after being filtered by the filter element, and is discharged from the oil outlet pipeline. In the operation process of the fuel filter, the pressure difference between the oil inlet cavity and the oil outlet cavity is increased possibly due to factors such as air leakage or filter element filtration performance reduction, and the service life of the filter element is influenced.

In order to solve the above problems, in the fuel filter in the prior art, an exhaust hole is usually formed in an upper end cover of the filter element to communicate the oil inlet cavity with the oil outlet cavity, but the solution is problematic in that when the liquid level of dirty oil liquid in the oil inlet cavity is high, the dirty oil liquid may leak into the oil outlet cavity through the exhaust hole due to jolt or inclination of the fuel filter, and pollute the clean oil liquid.

Disclosure of Invention

According to one aspect of the invention, the invention provides an exhaust structure to solve the problem that dirty oil liquid in an oil inlet cavity may be leaked into an oil outlet cavity through an exhaust hole due to jolt or inclination of a fuel filter when the liquid level of the dirty oil liquid in the oil inlet cavity is high in the prior art, so that pollution is caused to clean oil liquid.

In order to achieve the above purpose, the invention adopts the following technical scheme:

The exhaust structure is used for being installed in an oil cavity of the shell, a filter assembly is further arranged in the oil cavity and divides the oil cavity into an oil inlet cavity and an oil outlet cavity, the filter assembly comprises a filter element and an upper end cover, the filter element is configured to only allow oil to pass through, the upper end cover is provided with an upper end cover opening, and the upper end cover opening is communicated with the oil inlet cavity; comprising the following steps:

The exhaust pipe is provided with a first end connected with the upper end cover and a second end extending towards the oil outlet cavity, and the oil outlet cavity, the inner cavity of the exhaust pipe and the upper end cover opening are sequentially communicated;

The floating ball can float upwards along with the rising of the liquid level of the oil in the oil outlet cavity and seals the second end so as to separate the inner cavity of the exhaust pipe from the oil outlet cavity.

As the preferred scheme of exhaust structure, the holding tank has been seted up to the second end, the inner chamber of blast pipe with go up the holding tank intercommunication, the floater can with go up the cell wall laminating of holding tank, so that the inner chamber of blast pipe with go out oily chamber separation.

As the preferred scheme of exhaust structure, still include the floater, the floater can follow the change of the fluid liquid level height in the play oil cavity to have shutoff position and separation position, when the floater is located the shutoff position, the floater shutoff the second end, when the floater is located the separation position, the floater with the second end separation, and can support on the floater.

As a preferable scheme of the exhaust structure, the distance between the floating ball seat and the second end is smaller than the diameter of the floating ball.

As a preferable aspect of the exhaust structure, the float seat has a lower receiving groove, and the float is supported at a groove wall of the lower receiving groove when the float is located at the separation position.

As the preferable scheme of exhaust structure, the floater seat has the through-hole, the one end intercommunication of through-hole lower holding tank, the other end intercommunication the oil pocket.

As the preferred scheme of exhaust structure, still including set up in exhaust channel structure of upper end cover, exhaust channel structure is located advance oil intracavity and have the exhaust passage, the upper end cover opening with advance oil chamber and pass through exhaust passage intercommunication, exhaust channel structure including set up in the base of upper end cover with set up in the extension piece of base, the extension piece extends along vertical direction, exhaust passage passes the extension piece.

As the preferred scheme of exhaust structure, still include base elastic component, the one end of base elastic component is connected the casing, the other end is connected exhaust channel structure, the base elastic component is used for providing and makes exhaust channel structure support tightly in the elastic force of upper end cover.

According to another aspect of the present invention, there is provided a fuel filter including the above exhaust structure, further comprising:

A housing having an oil chamber, the exhaust structure being mounted within the oil chamber;

the filter assembly is arranged in the oil cavity and divides the oil cavity into an oil inlet cavity and an oil outlet cavity, the filter assembly comprises a filter element and an upper end cover, the filter element is configured to only allow oil to pass through, the upper end cover is provided with an upper end cover opening, the upper end cover opening is used for communicating the oil inlet cavity and the oil outlet cavity, and the exhaust structure is connected to the upper end cover.

As the preferable scheme of the fuel filter, the filter element is cylindrical, the oil inlet cavity is positioned outside the filter element, and the oil outlet cavity is positioned inside the filter element.

The beneficial effects of the invention are as follows:

The invention provides an exhaust structure which is used for being installed in an oil cavity of a shell, a filter assembly divides the oil cavity into an oil inlet cavity and an oil outlet cavity, an upper end cover of the filter assembly is provided with an upper end cover opening communicated with the oil inlet cavity, an exhaust pipe of the exhaust structure is provided with a first end connected with the upper end cover and a second end extending towards the oil outlet cavity, and the oil outlet cavity, the inner cavity of the exhaust pipe and the upper end cover opening are communicated in sequence, so that the oil outlet cavity and the oil inlet cavity are communicated, the pressure of the oil outlet cavity and the pressure of the oil inlet cavity are balanced, and the pressure difference is reduced. The density of the floating ball is smaller than that of the oil in the oil outlet cavity, the second end of the floating ball can be plugged, so that the inner cavity of the exhaust pipe is separated from the oil outlet cavity, the oil outlet cavity is separated from the oil inlet cavity, and dirty oil in the oil inlet cavity is prevented from entering the oil outlet cavity through the exhaust pipe when the liquid level of the oil in the oil outlet cavity rises, so that the oil in the oil outlet cavity is prevented from being polluted. In addition, as the second end of the exhaust pipe extends towards the oil outlet cavity, the second end can be blocked by the floating ball when the liquid level in the oil outlet cavity is low, the oil outlet cavity and the oil inlet cavity are separated, and the exhaust pipe is applicable to the situation that the pressure difference between the oil inlet cavity and the oil outlet cavity is large, so that the liquid level difference between the oil inlet cavity and the oil outlet cavity is large.

The invention also provides a fuel filter, which comprises the exhaust structure, wherein the exhaust structure can enable the oil outlet cavity to be communicated with the oil inlet cavity so as to balance the pressure of the oil outlet cavity and the pressure of the oil inlet cavity, when the liquid level of the oil in the oil outlet cavity is higher, the floating ball can float upwards along with the rising of the liquid level of the oil in the oil outlet cavity, and dirty oil in the oil inlet cavity is prevented from entering the oil outlet cavity through the exhaust pipe, so that the oil in the oil outlet cavity is prevented from being polluted.

The invention also provides a vehicle which comprises the fuel filter and has the same effect as the fuel filter.

Drawings

FIG. 1 is a schematic diagram of a fuel filter according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a fuel filter according to an embodiment of the invention;

FIG. 3 is an enlarged view at A in FIG. 2;

Fig. 4 is an enlarged view at B in fig. 2;

Fig. 5 is an enlarged view at C in fig. 2;

FIG. 6 is an enlarged view at D in FIG. 2;

FIG. 7 is a cross-sectional view of a pressure sensing tube in accordance with an embodiment of the present invention;

FIG. 8 is a cross-sectional view of another pressure sensing tube in an embodiment of the present invention;

fig. 9 is an enlarged view at E in fig. 8;

FIG. 10 is a schematic diagram of the structure of a pressure alarm in an embodiment of the invention;

FIG. 11 is a schematic view of another fuel filter according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view of another fuel filter in accordance with an embodiment of the invention;

Fig. 13 is an enlarged view of F in fig. 12;

Fig. 14 is an enlarged view at G in fig. 12;

FIG. 15 is a second schematic view of another fuel filter according to an embodiment of the present invention;

fig. 16 is an enlarged view at H in fig. 15;

FIG. 17 is a schematic view of a fuel filter according to another embodiment of the invention;

FIG. 18 is a cross-sectional view of yet another fuel filter in accordance with an embodiment of the invention;

fig. 19 is an enlarged view at I in fig. 18.

In the figure:

100. A housing; 101. an oil inlet pipe; 102. an oil outlet pipe; 110. an oil chamber; 111. an oil inlet cavity; 112. an oil outlet cavity; 120. a groove; 130. a base 140 and an upper shell; 150. a collection chamber; 151. a liquid discharge valve;

200. A filter assembly; 210. a filter element; 211. a window; 212. a light transmitting member; 220. an upper end cap; 221. an upper end cap opening;

300. A partition plate; 310. a diversion cavity; 311. an oil inlet guide cavity; 312. an oil outlet diversion cavity; 320. a flow guide; 321. an inner deflector; 322. an outer deflector; 323. an oil passage; 330. a receiving groove;

400. An oil drain pipe; 410. an oil suction hole;

500. A pressure detection tube; 501. a first pipe section; 502. a second pipe section; 5021. a first limiting member; 5022. a second limiting piece; 503. a third pipe section; 510. a pressure identifier; 520. a pressure tube elastic member;

1. an exhaust pipe; 11. a first end; 12. a second end; 13. an upper receiving groove;

10. An air duct; 14. a chute;

2. a floating ball;

3. a floating seat; 31. a lower accommodating groove;

4. an exhaust passage structure; 41. an exhaust passage; 42. a base; 43. an extension member; 44. a base elastic member;

5. a float; 51. a slider; 52. a blocking member; 53. a limiting piece;

6. An alarm housing; 61. a first chamber; 62. a second chamber; 63. an alarm main body; 64. identifying a structure; 65. a push rod chute; 66. an interface;

7. A membrane;

8. An indicator; 81. a first elastic member; 82. an abutting portion;

9. A push rod; 91. a second elastic member; 92. a push rod sliding block; 93. a baffle; 94. and a deflector hole.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

The existing fuel filter generally comprises a shell and a filter element arranged in the shell, oil flows into an oil inlet cavity in the shell from an oil inlet pipeline, enters an oil outlet cavity after being filtered by the filter element and is discharged from the oil outlet pipeline, but when the pressure difference between the oil inlet cavity and the oil outlet cavity is increased, the service life of the filter element is influenced. In this regard, in the fuel filter in the prior art, the upper end cover of the filter element is usually provided with the exhaust hole so as to communicate the oil inlet cavity with the oil outlet cavity, but when the liquid level of dirty oil liquid in the oil inlet cavity is higher, the dirty oil liquid may leak into the oil outlet cavity through the exhaust hole due to jolt or inclination of the fuel filter, so that pollution is caused to clean oil liquid.

To the above-mentioned problem, this embodiment provides exhaust structure to solve among the prior art when the dirty oil liquid level in the oil inlet chamber is higher, dirty oil liquid can be because of jolting or fuel filter slope and channeling into the oil outlet chamber through the exhaust hole, the problem that causes the pollution to clean oil liquid can be used to vehicle technical field.

Referring to fig. 1-10, the present embodiment provides a fuel filter, which may be specifically a fuel strainer or other filter, including a housing 100 and a filter assembly 200, the housing 100 having an oil chamber 110. The filter assembly 200 is installed in the oil chamber 110 and divides the oil chamber 110 into an oil inlet chamber 111 and an oil outlet chamber 112, the filter assembly 200 comprises a filter element 210 and an upper end cover 220, the filter element 210 is configured to only allow oil to pass through and enter the oil outlet chamber 112 from the oil inlet chamber 111, thereby filtering dirty oil in the oil inlet chamber 111, and the filtered clean oil enters the oil outlet chamber 112.

With continued reference to fig. 1-10, the fuel filter further includes an oil inlet pipe 101 and an oil outlet pipe 102, the oil inlet pipe 101 is disposed in the housing 100, an inner cavity of the oil inlet pipe 101 is communicated with the oil cavity 110, specifically, an inner cavity oil inlet cavity 111 of the oil inlet pipe 101 is communicated, so that oil in the oil inlet pipe 101 enters the oil inlet cavity 111; the oil outlet pipe 102 is disposed in the housing 100, and an inner cavity of the oil outlet pipe 102 is communicated with the oil cavity 110, specifically, an inner cavity of the oil outlet pipe 102 is communicated with the oil outlet cavity 112, so as to discharge oil in the oil outlet cavity 112 through the oil outlet pipe 102.

Optionally, the filter element 210 is cylindrical, the oil inlet cavity 111 is located outside the filter element 210, the oil outlet cavity 112 is located inside the filter element 210, wherein the oil inlet pipe 101 is connected to a lower side wall of the housing 100, so that an inner cavity of the oil inlet pipe 101 is communicated with the oil inlet cavity 111, and the oil outlet pipe 102 is connected to a lower portion of the housing 100, so that an inner cavity of the oil outlet pipe 102 is communicated with the oil outlet cavity 112.

With continued reference to fig. 1-10, the fuel filter further includes a venting structure for mounting within the oil cavity 110 of the housing 100. The upper end cap 220 has an upper end cap opening 221, the upper end cap opening 221 communicates with the oil inlet chamber 111, the exhaust structure includes an exhaust pipe 1, the exhaust pipe 1 has a first end 11 connected to the upper end cap 220 and a second end 12 extending toward the inside of the oil outlet chamber 112, the inner chamber of the exhaust pipe 1 and the upper end cap opening 221 communicate in sequence to balance the pressure of the oil outlet chamber 112 and the oil inlet chamber 111, and reduce the pressure difference.

With continued reference to fig. 1-10, the exhaust structure further includes a floating ball 2, where the density of the floating ball 2 is less than that of the oil in the oil outlet cavity 112, so that the floating ball 2 can float up along with the rising of the oil level in the oil outlet cavity 112, and the floating ball 2 can seal the second end 12 to separate the inner cavity of the exhaust pipe 1 from the oil outlet cavity 112, so as to separate the oil outlet cavity 112 from the oil inlet cavity 111, and when the oil level in the oil outlet cavity 112 rises, dirty oil in the oil inlet cavity 111 is prevented from entering the oil outlet cavity 112 through the exhaust pipe 1, so as to avoid pollution of the oil in the oil outlet cavity 112. In addition, since the second end 12 of the exhaust pipe 1 extends towards the oil outlet cavity 112, the second end 12 can be blocked by the floating ball 2 when the liquid level in the oil outlet cavity 112 is low, and the oil outlet cavity 112 and the oil inlet cavity 111 are separated, so that the exhaust pipe is applicable to the situation that the difference between the liquid levels of the oil inlet cavity 111 and the oil outlet cavity 112 is large due to the fact that the difference between the pressure of the oil inlet cavity 111 and the pressure of the oil outlet cavity 112 is large. Optionally, the second end 12 extends in a vertical direction.

With continued reference to fig. 1-10, the second end 12 is provided with an upper accommodating groove 13, the inner cavity of the exhaust pipe 1 is communicated with the upper accommodating groove 13, and the floating ball 2 can be attached to the groove wall of the upper accommodating groove 13, so that the inner cavity of the exhaust pipe 1 is separated from the oil outlet cavity 112. The separation of the inner cavity of the exhaust pipe 1 and the oil outlet cavity 112 is realized by the way that the floating ball 2 is attached to the groove wall of the upper accommodating groove 13, and the sealing effect is good. Alternatively, the groove wall of the upper receiving groove 13 is spherically shaped so that the floating ball 2 can be completely fitted to the groove wall of the upper receiving groove 13.

With continued reference to fig. 1-10, the exhaust structure further includes a ball seat 3, the ball float 2 is capable of moving between a blocking position and a separating position, when the ball float 2 is in the blocking position, the ball float 2 blocks the second end 12, and when the ball float 2 is in the separating position, the ball float 2 is separated from the second end 12 and can be supported on the ball seat 3, so that the ball float 2 is prevented from continuing to descend along with the change of the oil liquid level when the oil liquid level in the oil outlet cavity 112 is low.

With continued reference to fig. 1-10, the problem with the above structure is that when the oil level in the oil outlet cavity 112 is low, the floating ball 2 descends to be located at the separation position, the floating ball 2 separates from the second end 12, and when the floating ball 2 is located directly below the second end 12, the floating ball 2 can smoothly float to the second end 12 along with the ascending of the oil level and is attached to the second end 12, but if the floating ball 2 floats around in the oil outlet cavity 112, the position of the floating ball 2 is deviated, so that the floating ball 2 cannot float to the vicinity of the second end 12, and plugging cannot be completed. In this embodiment, the distance between the end of the floating ball seat 3 and the second end 12 is smaller than the diameter of the floating ball 2, so as to avoid the floating ball 2 floating around from between the floating ball seat 3 and the second end 12, so that the floating ball 2 can be always located between the floating ball seat 3 and the second end 12.

With continued reference to fig. 1 to 10, the float seat 3 has a lower receiving groove 31, and when the float 2 is positioned at the separated position, the float 2 is supported at the groove wall of the lower receiving groove 31 to enhance the stability of the support. Optionally, the groove wall of the lower accommodating groove 31 is spherical, so that the floating ball 2 and the groove wall of the lower accommodating groove 31 can be completely attached, and the stability of the support is further improved.

With continued reference to fig. 1-10, when the oil level in the oil outlet chamber 112 rises, the oil may be outside the lower receiving groove 31 and exert buoyancy on the floating ball 2 along the side of the floating ball 2 at a lower position, but it is apparent that the buoyancy exerted on the floating ball 2 along the side is relatively small, and there may be a case where the floating ball 2 cannot be smoothly floated. In this regard, the float seat 3 has a through hole, one end of which is connected to the lower receiving groove 31 and the other end is connected to the oil outlet cavity 112, so that the oil can directly pass through the through hole to apply buoyancy to the float ball 2 along the lower portion of the float ball 2, so that the float ball 2 can float smoothly. Optionally, the floating ball seat 3 is tubular and extends along a vertical direction, and the through hole is a central hole of the floating ball seat 3, so as to simplify the overall structure of the floating ball seat 3.

With continued reference to fig. 1-10, the exhaust structure further includes an exhaust channel structure 4 disposed on the upper end cover 220, where the exhaust channel structure 4 is located in the oil inlet cavity 111 and has an exhaust channel 41, the upper end cover opening 221 communicates with the oil inlet cavity 111 through the exhaust channel 41, the exhaust channel structure 4 includes a base 42 disposed on the upper end cover 220 and an extension piece 43 disposed on the base 42, the extension piece 43 extends in a vertical direction, and the exhaust channel 41 penetrates the extension piece 43. The arrangement is such that the exhaust passage 41 extends upwardly, so that the level of the oil in the oil inlet chamber 111 needs to be raised to a higher level to enter the exhaust passage 41, to further avoid the oil in the oil inlet chamber 111 from entering the exhaust passage 41. Optionally, the housing 100 has a recess 120 for receiving the extension 43, the side walls of the recess 120 being spaced from the outer wall of the extension 43 to facilitate passage of gas.

With continued reference to fig. 1-10, the exhaust structure further includes a base elastic member 44, one end of the base elastic member 44 is connected to the housing 100, and the other end is connected to the exhaust channel structure 4, where the base elastic member 44 is configured to provide an elastic force for pressing the exhaust channel structure 4 against the upper end cover 220, specifically, the base elastic member 44 is connected to the base 42 of the exhaust channel structure 4, so that the base 42 is pressed against the upper end cover 220, and the tightness between the base 42 and the upper end cover 220 is improved. In some embodiments, the filter assembly 200 is mounted to the lower chamber wall of the oil chamber 110, and the base spring 44 can simultaneously hold the filter assembly 200 against the lower chamber wall of the oil chamber 110.

With continued reference to fig. 1-10, the fuel filter of the present embodiment includes the above-described venting structure, further includes a housing 100 and a filter assembly 200, the housing 100 having an oil chamber 110, the venting structure being mounted within the oil chamber 110; the filter assembly 200 is disposed in the oil chamber 110 and divides the oil chamber 110 into an oil inlet chamber 111 and an oil outlet chamber 112, the filter assembly 200 includes a filter element 210 and an upper end cap 220, the filter element 210 is configured to allow only oil to pass through, the upper end cap 220 has an upper end cap opening 221, the upper end cap opening 221 is used for communicating the oil inlet chamber 111 and the oil outlet chamber 112, and an exhaust structure is connected to the upper end cap 220. The exhaust structure can enable the oil outlet cavity 112 to be communicated with the oil inlet cavity 111 so as to balance the pressure of the oil outlet cavity 112 and the pressure of the oil inlet cavity 111, when the oil liquid level of the oil outlet cavity 112 is higher, the floating ball 2 can float upwards along with the rising of the oil liquid level of the oil outlet cavity 112, dirty oil liquid in the oil inlet cavity 111 is prevented from entering the oil outlet cavity 112 through the exhaust pipe 1, and the pollution of the oil in the oil outlet cavity 112 is avoided.

With continued reference to fig. 1-10, the fuel filter further includes an oil drain pipe 400, where the oil drain pipe 400 is disposed on a lower cavity wall of the oil drain cavity 112 and extends toward the oil drain cavity 112, and openings are disposed at two ends of the oil drain pipe 400, and the oil drain cavity 112, the inner cavity of the oil drain pipe 400, and the inner cavity of the oil drain pipe 102 are sequentially communicated, so that oil in the oil drain cavity 112 can flow into the oil drain pipe 102 through the oil drain pipe 400.

With continued reference to fig. 1-10, the side wall of the oil drain pipe 400 is provided with an oil suction hole 410, the oil suction hole 410 is communicated with the inner cavity of the oil drain pipe 400 and the oil outlet cavity 112, and as both ends of the oil drain pipe 400 are provided with openings, oil in the oil outlet cavity 112 can enter the inner cavity of the oil drain pipe 400 through the opening of the oil drain pipe 400 in the oil outlet cavity 112, namely, enter the inner cavity of the oil drain pipe 400 through the opening of the upper end surface of the oil drain pipe 400, and also can enter the inner cavity of the oil drain pipe 400 through the oil suction hole 410. In addition, since the oil drain pipe 400 extends toward the inside of the oil drain chamber 112, the height of the oil suction hole 410 is lower than the opening height of the upper end surface. When the pressure of the oil outlet cavity 112 decreases, and thus the oil level in the oil outlet cavity 112 is lower than the opening of the upper end surface of the oil drain pipe 400, the oil can enter the inner cavity of the oil drain pipe 400 through the oil suction hole 410, so that the oil can smoothly enter the oil outlet pipe 102, and an engine using the fuel filter can be smoothly started.

With continued reference to fig. 1-10, it can be appreciated that, as the engine starts, the oil pump gradually draws out air in the oil outlet cavity 112, so that the oil level in the oil outlet cavity 112 rises above the opening of the upper end surface, at this time, the oil can be normally sucked into the inner cavity of the oil drain pipe 400 through the opening of the upper end surface, and at this time, if the amount of oil passing through the oil suction hole 410 is high, the utilization rate of the filter element may be reduced. In this regard, the cross-sectional area of the opening of the end of the oil drain pipe 400 extending into the oil drain cavity 112 is smaller than the cross-sectional area of the oil suction hole 410, so as to reduce the flow rate of the oil passing through the oil suction hole 410, and minimize the influence of the oil suction hole 410 on the utilization rate of the filter element 210 when the oil level of the oil drain cavity 112 is high.

With continued reference to fig. 1-10, the oil drain pipe 400 is provided with a plurality of oil suction holes 410, and the plurality of oil suction holes 410 are spaced apart in a circumferential direction so that oil can flow into the oil drain pipe 400 in different directions. Alternatively, the sum of the sectional areas of the plurality of oil suction holes 410 is still smaller than the sectional area of the opening of the upper end surface.

With continued reference to fig. 1-10, the fuel filter further includes a partition plate 300 and an oil inlet pipe 101 provided to the housing 100, the partition plate 300 being provided to the housing 100, the oil chamber 110 being located above the partition plate 300 such that an upper surface of the partition plate 300 constitutes a lower chamber wall of the oil chamber 110. The oil drain pipe 400 is arranged on the partition plate 300, the lower surface of the partition plate 300 and the shell 100 enclose a flow guide cavity 310, a flow guide piece 320 is arranged in the flow guide cavity 310, the flow guide piece 320 divides the flow guide cavity 310 into an oil inlet flow guide cavity 311 and an oil outlet flow guide cavity 312, the inner cavity of the oil inlet pipe 101, the oil inlet flow guide cavity 311 and the oil inlet cavity 111 are sequentially communicated, and the inner cavity of the oil outlet pipe 102, the oil outlet flow guide cavity 312, the inner cavity of the oil drain pipe 400 and the oil outlet cavity 112 are sequentially communicated. Wherein, because the filter element 210 is in a tubular shape, the oil inlet cavity 111 is located outside the filter element 210, the oil outlet cavity 112 is located inside the filter element 210, and the oil outlet guide cavity 312 is located inside the guide piece 320, and the oil inlet guide cavity 311 is located outside the guide piece 320 for matching with the positions of the oil inlet cavity 111 and the oil outlet cavity 112.

With continued reference to fig. 1-10, a partition plate opening is formed in the middle of the partition plate 300, and the oil outlet guide chamber 312 is communicated with the oil outlet chamber 112 through the partition plate opening. Specifically, the middle part of the partition plate 300 is provided with a partition plate opening, and the oil drain pipe 400 passes through the partition plate opening to communicate the oil outlet guide cavity 312 and the oil outlet cavity 112, wherein the oil drain pipe 400 may be disposed on the guide member 320, and the guide member 320 is sleeved on the oil drain pipe 400, alternatively, the outer wall of the oil drain pipe 400 is attached to the inner wall of the guide member 320, so that oil can only enter the oil outlet guide cavity 312 from the oil outlet cavity 112 through the oil drain pipe 400.

With continued reference to fig. 1-10, the side wall of the partition plate 300 is spaced apart from the inner wall of the housing 100 such that the oil inlet guide chamber 311 communicates with the oil inlet chamber 111, allowing oil to pass through the gap between the side wall of the partition plate 300 and the inner wall of the housing 100 and enter the oil inlet chamber 111.

With continued reference to fig. 1-10, the flow guiding element 320 includes an inner flow guiding element 321 and an outer flow guiding element 322 sleeved on the inner flow guiding element 321, the outer flow guiding element 322 is connected to the side wall of the opening of the partition plate, the inner flow guiding element 321 and the outer flow guiding element 322 are arranged at intervals, an oil passing channel 323 is arranged between the inner flow guiding element 321 and the outer flow guiding element 322, the shell 100 further has a collecting cavity 150 positioned below the oil passing channel 323, and the oil outlet cavity 112, the oil passing channel 323 and the collecting cavity 150 are sequentially communicated. The collecting chamber 150 may be used for collecting the filtered oil, and optionally, a drain port is formed on a chamber wall of the collecting chamber 150, and a drain valve 151 is provided, where the drain valve 151 is used for opening or closing the drain port.

With continued reference to fig. 1-10, the upper surface of the partition plate 300 is provided with a receiving groove 330, and the lower end of the filter cartridge 210 is mounted in the receiving groove 330, so that the filter cartridge 210 can be stably mounted in the fuel filter.

With continued reference to fig. 1-10, the fuel filter further includes a pressure detecting tube 500, a pressure marking member 510, and a pressure tube elastic member 520, the pressure detecting tube 500 is made of a light-transmitting material, and the oil inlet tube 101 and the oil outlet tube 102 are respectively connected to both ends of the pressure detecting tube 500, so that the inner cavity of the oil inlet tube 101 and the inner cavity of the oil outlet tube 102 are simultaneously communicated with the inner cavity of the pressure detecting tube 500. The pressure identifier 510 is movably disposed in the inner cavity of the pressure detecting pipe 500 and can move along with the change of the oil pressure at two sides, so that when the oil pressure in the inner cavity of the oil inlet pipe 101 or the oil pressure in the inner cavity of the oil outlet pipe 102 changes, the pressure difference between the inner cavity of the oil inlet pipe 101 and the inner cavity of the oil outlet pipe 102 changes, and then the pressure identifier 510 is driven to move, and a user can judge the change of the oil pressure at two sides through the movement of the pressure identifier 510. Optionally, the pressure identifier 510 is always attached to the inner wall of the pressure detecting tube 500 to form a seal, preventing oil from passing through, so that the pressure identifier 510 can move under the action of oil pressure, preventing errors in measurement results caused by oil leakage, and avoiding pollution to the oil in the oil outlet tube 102. In this embodiment, the pressure identifier 510 is spherical, and in other embodiments, may be cylindrical.

Alternatively, the pressure tube elastic member 520 has one end connected to the inner wall of the pressure sensing tube 500 and the other end connected to the pressure indicating member 510, and the pressure tube elastic member 520 serves to provide an elastic force for resetting the pressure indicating member 510 after the oil drives the pressure indicating member 510 to move. The pressure mark 510 is displaced by the change of the pressure difference between the inner cavity of the oil inlet pipe 101 and the inner cavity of the oil outlet pipe 102, meanwhile, the pressure pipe elastic piece 520 is elastically deformed, and the displacement of the pressure mark 510 is different, so that the elastic force of the pressure mark 510 is obtained through the displacement of the pressure mark 510, and the pressure difference of the oil liquid at two sides of the pressure mark 510 is obtained, so that the pressure difference of the oil liquid at two sides of the pressure mark 510 is quantitatively analyzed.

With continued reference to fig. 1-10, the pressure sensing tube 500 includes a first tube segment 501, a second tube segment 502, and a third tube segment 503 connected in sequence, the first tube segment 501 being connected to the oil inlet tube 101, the third tube segment 503 being connected to the oil outlet tube 102, such that the lumens of the oil inlet tube 101, the first tube segment 501, the second tube segment 502, the third tube segment 503, and the oil outlet tube 102 are sequentially connected. The second pipe section 502 extends along the horizontal direction, the extending direction of the first pipe section 501 forms an angle with the horizontal direction, the extending direction of the third pipe section 503 forms an angle with the horizontal direction, and the pressure identifier 510 is movably disposed in the second pipe section 502, so that the influence of gravity of the pressure identifier 510 on the detection result can be avoided.

Referring to fig. 1-10, a first limiting member 5021 is protruding from an inner wall of the second pipe section 502 near one end of the first pipe section 501, and the first limiting member 5021 is used for preventing the pressure identifier 510 from entering the first pipe section 501; the inner wall of the second pipe section 502 near one end of the third pipe section 503 is convexly provided with a second limiting member 5022, and the second limiting member 5022 is used for preventing the pressure identifier 510 from entering the third pipe section 503. The pressure marker 510 is prevented from moving away from the second pipe segment 502 by the first stop 5021 and the second stop 5022, avoiding excessive movement of the pressure marker 510.

Optionally, the side wall of the second pipe section 502 is provided with a pressure scale mark, so that a user can intuitively observe the displacement of the pressure identifier 510 through the scale mark, and further obtain the pressure difference of the oil liquid at two sides of the pressure identifier 510. Preferably, the scale marks are a plurality of parallel scale marks arranged at intervals, at least part of the scale marks are provided with digital marks nearby, and the scale marks with different colors can be used for marking, so that the reading is convenient.

With continued reference to fig. 1-10, pressure tube elastic members 520 are provided in two, two pressure tube elastic members 520 are respectively located at both sides of pressure marking member 510, and an elastic force can be applied to pressure marking member 510 along both sides of pressure marking member 510 by means of two pressure tube elastic members 520, respectively. Alternatively, both pressure tube elastic members 520 are disposed within second tube section 502 and both extend and retract in a horizontal direction.

It will be appreciated that the heights of the oil inlet pipe 101 and the oil outlet pipe 102 also affect the pressure difference of the oil at both sides of the pressure identifier 510, so that after the pressure difference of the oil at both sides of the pressure identifier 510 is obtained, the height difference between the second pipe section 502 and the oil inlet pipe 101 and the oil outlet pipe 102 needs to be considered, so as to obtain the pressure difference between the oil inlet pipe 101 and the inner cavity of the oil outlet pipe 102. In general, the oil pressure of the oil inlet pipe 101 is greater than the oil pressure of the oil outlet pipe 102, and thus, in order to accommodate this characteristic, the height of the oil inlet pipe 101 is lower than the height of the oil outlet pipe 102 so as to maintain the oil pressure on both sides of the pressure mark 510 as balanced as possible. In addition, the height of the oil inlet pipe 101 may be higher than the height of the oil outlet pipe 102, so that the pressure mark 510 always has a tendency to move toward the oil outlet pipe 102 side.

Referring to fig. 10, the fuel filter in the present embodiment further includes a pressure warning device for being disposed in the fuel inlet pipe 101 or the fuel outlet pipe 102 of the fuel filter. The pressure warning device comprises a warning device housing 6, a diaphragm 7, an indicator 8 and a first elastic member 81. The alarm shell 6 is provided with an alarm inner cavity, the diaphragm 7 is arranged in the alarm inner cavity and divides the alarm inner cavity into a first cavity 61 and a second cavity 62, the first cavity 61 can be communicated with the inner cavity of the oil inlet pipe 101 or the inner cavity of the oil outlet pipe 102, and the diaphragm 7 can deform along a first direction. The indicator 8 is slidably disposed in the second cavity 62 along the first direction, and the first elastic member 81 is configured to provide an elastic force for sliding the indicator 8, so that the indicator 8 always abuts against the diaphragm 7, and thus the elastic force acts on the diaphragm 7. The pressure of the first chamber 61 is generally greater than the pressure of the second chamber 62, and when the pressure of the first chamber 61 is normal, the sum of the elastic force of the first elastic member 81 and the pressure of the second chamber 62 is balanced with the pressure of the first chamber 61. When the pressure of the first cavity 61 is reduced, the stress conditions of the two ends of the diaphragm 7 are changed, and the first elastic piece 81 drives the indicator 8 to move towards the direction of the first cavity 61, so that the stress on the two sides of the diaphragm 7 is balanced. At this time, the oil pressure of the first chamber 61 can be quantitatively determined by the position of the indicator 8 to determine whether the oil pressure of the inner chamber of the oil inlet pipe 101 or the oil outlet pipe 102 is normal.

With continued reference to fig. 10, the alarm housing 6 includes an alarm main body 63 and a marking structure 64 connected to the alarm main body 63, the diaphragm 7 is disposed on the alarm main body 63, the first cavity 61 is located on one side of the diaphragm 7, the alarm main body 63 and the marking structure 64 enclose a second cavity 62 together, the indicator 8 is slidably disposed on the marking structure 64, and the marking structure 64 is made of a light-transmitting material, so that a user can directly observe the position of the indicator 8 through the marking structure 64.

With continued reference to fig. 10, the marking structure 64 is provided with scale marks, so that a user can intuitively observe the displacement of the indicator 8 through the scale marks, thereby obtaining the oil pressure of the first chamber 61. Preferably, the scale marks are a plurality of parallel scale marks arranged at intervals, at least part of the scale marks are provided with digital marks nearby, and the scale marks with different colors can be used for marking, such as red, yellow, blue and the like, so that the reading is convenient and the scale marks are more striking.

With continued reference to fig. 10, the pressure warning device further includes a push rod 9 and a second elastic member 91. The push rod 9 is slidably disposed in the first cavity 61 along the first direction, and the second elastic member 91 is configured to provide an elastic force for sliding the push rod 9, so that the push rod 9 is always abutted against the membrane 7, specifically, the push rod 9 and the indicator 8 are respectively abutted against two sides of the membrane 7. The elastic force of the first elastic member 81 can be balanced by the second elastic member 91, preventing the excessive movement of the indicator 8, and preventing the excessive deformation of the diaphragm 7. In addition, the user can adjust the elastic force by replacing the first elastic member 81 or the second elastic member 91, so as to adjust the pressure indication range of the pressure alarm, so as to be suitable for different types of fuel filters.

With continued reference to fig. 10, the alarm main body 63 has a push rod chute 65 communicating with the first cavity 61, the push rod 9 includes a push rod slider 92 and a blocking piece 93 disposed on the push rod slider 92, the push rod slider 92 can slide along a first direction relative to the push rod chute 65, specifically, a part of the push rod slider 92 is slidably disposed on the push rod chute 65, another part of the push rod slider extends out of the push rod chute 65, the blocking piece 93 is slidably disposed in the first cavity 61 along the first direction, the push rod slider 92 is attached to a side wall of the push rod chute 65, an interface 66 is provided on a side wall of the push rod chute 65, and the interface 66 communicates with the first cavity 61, so that the first cavity 61 communicates with an inner cavity of the oil inlet pipe 101 or the oil outlet pipe 102, and oil is convenient to pass through. In addition, the push rod sliding groove 65 is formed in the cavity wall of the first cavity 61 away from the indicator 8, one end of the second elastic piece 91 abuts against the blocking piece 92, and the other end abuts against the cavity wall of the first cavity 61 away from the indicator 8.

With continued reference to fig. 10, the push rod slide 92 is capable of sliding in a first direction to have a closed position and an on position, and when the push rod slide 92 is in the closed position, the push rod slide 92 closes the port 66 to separate the inner cavity of the oil inlet pipe 101 from the port 66 or the inner cavity of the oil outlet pipe 102 from the port 66, preventing oil in the first cavity 61 from passing therethrough. When the push rod slide block 92 is located at the conducting position, the push rod slide block 92 opens the interface 66, the inner cavity of the oil inlet pipe 101 or the inner cavity of the oil outlet pipe 102 is communicated with the interface 66, and at this time, oil can enter and exit the first cavity 61 through the interface 66. It will be appreciated that when the oil pressure of the oil inlet pipe 101 or the oil outlet pipe 102 decreases, the indicator 8 moves towards the first cavity 61, at this time, the push rod slide 92 moves from the conducting position to the closing position, when the push rod slide 92 is in the conducting position, the oil can normally enter and exit the first cavity 61 through the interface 66, when the push rod slide 92 is in the closing position, the push rod slide 92 closes the first cavity 61 to prevent the oil from entering and exiting, so that the oil pressure of the first cavity 61 is kept unchanged, at this time, the push rod slide 92 moves only under the influence of the oil pressure difference between the first cavity 61 and the inner cavity of the oil inlet pipe 101 or the oil outlet pipe 102, so that the push rod slide 92 continues to move towards the inner cavity of the oil inlet pipe 101 or the oil outlet pipe 102 after moving to the closing position, at this time, the indicator 8 also moves to remind maintenance personnel to overhaul as soon as possible.

With continued reference to fig. 10, the flap 93 can abut the cavity wall of the first cavity 61 away from the indicator 8 in the first direction to more stabilize movement of the flap 93 in the first direction.

With continued reference to fig. 10, the outer wall of the baffle plate 93 is attached to the cavity wall of the first cavity 61, the baffle plate 93 is provided with a diversion hole 94, and the first cavities 61 at two ends of the baffle plate 93 are communicated through the diversion hole 94.

With continued reference to fig. 10, the indicator 8 is provided with an abutment portion 82, and the abutment portion 82 can abut against an end of the marking structure 64 away from the alarm main body 63 to limit the indicator 8, so as to prevent excessive displacement of the indicator 8, and at the same time, the abutment portion 82 can be used as a marking portion of the indicator 8, and a user can determine the position of the indicator 8 according to the position of the abutment portion 82 against the marking structure 64.

Referring to fig. 11-16, the present embodiment also provides a fuel filter having another exhaust structure, which is also installed in the oil chamber 110 of the housing 100, and solves the problem that dirty oil may be blown into the oil chamber through the exhaust hole due to jolt or tilting of the fuel filter by another technical scheme.

With continued reference to fig. 11-16, the exhaust structure includes an air duct 10, the air duct 10 is connected to an upper end cover 220 and is provided with a chute 14, an inner cavity of the air duct 10 is communicated with an upper end cover opening 221, and an inner cavity of the air duct 10 is communicated with an oil outlet cavity 112 through the chute 14, so that the oil outlet cavity 112, the chute 14, the inner cavity of the air duct 10, the upper end cover opening 221 and the oil inlet cavity 111 are sequentially communicated, the oil outlet cavity 112 is communicated with the oil inlet cavity 111, the pressure of the oil outlet cavity 112 and the pressure of the oil inlet cavity 111 are balanced, and the pressure difference is reduced.

With continued reference to fig. 11-16, the direction of extension of the chute 14 is at an angle to the horizontal; the exhaust structure further comprises a floater 5, the floater 5 is movably positioned in the inner cavity of the air duct 10 and is in sliding fit with the sliding groove 14, the density of the floater 5 is smaller than that of oil in the oil outlet cavity 112, so that the floater 5 can float upwards along with the rising of the liquid level of the oil in the oil outlet cavity 112, the floater 5 can be abutted with the wall of the upper part of the sliding groove 14, the inner cavity of the air duct 10 positioned above the floater 5 is separated from the oil outlet cavity 112, and therefore when the liquid level of the oil in the oil outlet cavity 112 rises, dirty oil in the oil inlet cavity 111 is prevented from entering the oil outlet cavity through the air duct 10, and the oil in the oil outlet cavity 112 is prevented from being polluted. Optionally, the sliding grooves 14 extend in a vertical direction to facilitate the floating up of the float 5, and furthermore, in order to enhance the stability of the sliding connection between the float 5 and the air duct 10, the air duct 10 is provided with two sliding grooves 14, the float 2 being slidingly disposed at both sliding grooves 14.

With continued reference to fig. 11-16, the float 5 includes a sliding member 51 and a blocking member 52, the sliding member 51 is slidably disposed in the chute 14, the blocking member 52 is always attached to the inner wall of the air duct 10, and separation between the inner cavity of the air duct 10 and the oil outlet cavity 112 is achieved by attaching the blocking member 52 to the inner wall of the air duct 10, so that the sealing effect is good.

With continued reference to fig. 11-16, the sliding member 51 is further provided with a limiting member 53, the limiting member 53 and the blocking member 52 are respectively located at two sides of the chute 14, the limiting member 53 and the blocking member 52 are used for limiting the sliding member 51 to separate from the chute 14, and the position of the float 2 can be limited by arranging the limiting member 53, so that the float 2 can only slide along the extending direction of the chute 14 relative to the air duct 10, and the float 2 is prevented from separating from the chute 14.

With continued reference to fig. 11-16, the chute 14 has a channel width that is less than the width of the blocking member 52 to avoid removal of the blocking member 52 from the lumen of the airway 10, while avoiding removal of the float 5 from the chute 14.

With continued reference to fig. 11-16, when the float 5 rises to the top of the chute 14 as the level of oil in the oil outlet chamber 112 rises, the slider 51 needs to engage the upper chute wall of the chute 14 to separate the inner chamber of the air duct 10 above the float 5 from the oil outlet chamber 112. However, only the sliding member 51 is attached to the upper wall of the chute 14 to achieve separation, which is easy to cause leakage, in this embodiment, the upper surface of the blocking member 52 is higher than the sliding member 51, so that when the sliding member 51 is attached to the upper wall of the chute 14, the portion of the blocking member 52 higher than the sliding member 51 can still be attached to the inner wall of the air duct 10 to achieve separation.

With continued reference to fig. 11-16, when the level of the oil in the oil outlet cavity 112 is low, so that the float 5 falls on the lower groove wall of the chute 14, the inner cavity of the air duct 10 below the float 5 may be separated from the oil outlet cavity 112, at this time, along with the rising of the oil level in the oil outlet cavity 112, the oil can only exert buoyancy on the float 5 through the portion of the float 5 protruding out of the chute 14, for example, through the limiting member 53 or part of the sliding member 51, but obviously, the buoyancy exerted at this time is relatively small, and there may be a case that the float 5 cannot float smoothly. In this regard, the end of the air duct 10 far away from the upper end cover opening 221 is communicated with the oil outlet cavity 112, so that oil can enter the inner cavity of the air duct 10 from the oil outlet cavity 112 at the end far away from the upper end cover opening 221, and the oil can directly apply buoyancy to the blocking piece 52 of the float 5 along the lower side of the float 5 through the through hole, so that the float 5 can float smoothly.

The present embodiment provides another fuel filter, which also includes a housing 100, a filter assembly 200, an oil inlet pipe 101, an oil outlet pipe 102, a partition plate 300, and a flow guide 320, and the specific structure thereof is described in detail above and will not be repeated.

Referring to fig. 17, the housing 100 is at least partially made of a light-transmitting material. The side wall of the filter element 210 of the filter assembly 200 is provided with a window 211, two ends of the window 211 are respectively communicated with the oil inlet cavity 111 and the oil outlet cavity 112, the window 211 is provided with a light-transmitting piece 212, and the light-transmitting piece 212 is attached to the side wall of the window 211 so as to prevent oil from leaking from the window 211. The user can intuitively observe the liquid levels of the oil inlet cavity 111 and the oil outlet cavity 112 through the housing 100 and the light transmitting member 212, so as to judge whether the pressure difference between the oil inlet cavity 111 and the oil outlet cavity 112 is within a normal range. Optionally, the light transmissive member 212 is made of a colorless transparent material.

Alternatively, the filter element 210 is cylindrical, the oil inlet chamber 111 is located outside the filter element 210, and the oil outlet chamber 112 is located inside the filter element 210, so that a user can directly observe the liquid level of the oil inlet chamber 111 through the part of the housing 100 made of the light-transmitting material, and observe the liquid level of the oil chamber 112 again through the light-transmitting member 212. In addition, to accommodate this structure, the oil inlet pipe 101 is tangential to the outer wall of the casing 100, and the oil outlet pipe 102 passes through the middle portion of the casing 100.

With continued reference to fig. 17, the window 211 is formed in the sidewall of the filter element 210, and the bottom of the partial housing 100 made of the transparent material is lower than the top of the transparent member 212, so that the partial housing 100 made of the transparent material and the transparent member 212 overlap in the vertical direction, which is convenient for the user to observe. The outer end surface of the light-transmitting member 212 is flush with the outer wall surface of the filter element 210, or the outer end surface of the light-transmitting member 212 is arc-shaped, and the center line of the light-transmitting member 212 coincides with the axis of the filter element 210. The inner end surface of the light-transmitting member 212 is flush with the inner wall surface of the filter element 210, or the inner end of the light-transmitting member 212 is circular arc-shaped, and the center line of the light-transmitting member 212 coincides with the axis of the filter element 210. In this embodiment, the outer end surface and the inner end surface of the transparent member 212 are all arc-shaped.

With continued reference to fig. 17, the filter element 210 is provided with a plurality of windows 211, the plurality of windows 211 are arranged at intervals along the circumferential direction of the filter element 210, the light-transmitting members 212 are provided with a plurality of light-transmitting members 212, and the plurality of light-transmitting members 212 are arranged in the plurality of windows 211 in a one-to-one correspondence manner, so that a user can observe along different directions.

Optionally, the lower end surface of the filter element 210 is configured to abut against the cavity wall of the oil cavity 110, and the filter assembly further includes an upper end cap 220 connected to the upper end surface of the filter element 210.

Optionally, the oil inlet pipe 101 of the fuel filter is located below the oil cavity 110, and the oil outlet pipe 102 is located below the oil cavity 110, so that oil enters the oil cavity 110 from below the oil cavity 110, and meanwhile, the oil flows out of the oil cavity 110 from below, so that observation of the oil liquid level is not disturbed.

Generally, the filter element 210 is cylindrical, the oil inlet cavity 111 is located outside the filter element 210, the oil outlet cavity 112 is located inside the filter element 210, and a user can observe the liquid level of the oil inlet cavity 111 and the oil outlet cavity 112 through the light-transmitting member 212. However, there is a problem in that the liquid level of the oil inlet chamber 111 is generally greater than that of the oil outlet chamber 112, and a user is easily disturbed by the oil in the oil inlet chamber 111 when observing the liquid level of the oil outlet chamber 112 located inside the filter element 210.

In this regard, this embodiment provides an alternative, as shown in fig. 18, in which the oil inlet chamber 111 is located inside the filter element 210 and communicates with the inner cavity of the oil inlet pipe 101, and the oil outlet chamber 112 is located outside the filter element 210 and communicates with the inner cavity of the oil outlet pipe 102. The user can directly observe the liquid level of the oil inlet cavity 111 and the oil outlet cavity 112 through the shell 100 intuitively, and the user cannot be disturbed when observing the liquid level of the oil outlet cavity 112 because the oil outlet cavity 112 with a lower liquid level of oil is positioned outside the filter element 210.

In addition, the positions of the traditional oil inlet cavity 111 and the traditional oil outlet cavity 112 are interchanged, and the integral technical effect is achieved by combining the structure of the light-transmitting piece 212, specifically, the liquid level of the oil outlet cavity 112 outside the filter element 210 is lower, the liquid level of the oil inlet cavity 111 inside the filter element 210 is higher, namely, the liquid level on two sides of the light-transmitting piece 212 is different, the liquid level on one side close to an observer is lower, a user can observe the liquid level difference on two sides of the light-transmitting piece 212 through the light-transmitting piece 212, and then the pressure difference between the oil inlet cavity 111 and the oil outlet cavity 112 is quantitatively analyzed. Optionally, the light-transmitting member 212 is provided with scale marks, in particular a plurality of scale lines arranged in parallel and at intervals along the vertical direction, so as to facilitate reading.

With continued reference to fig. 18, to accommodate the location of the oil inlet chamber 111 and the oil outlet chamber 112, the oil inlet pipe 101 passes through the middle portion of the housing 100, and the oil outlet pipe 102 is tangential to the outer wall of the housing 100.

With continued reference to fig. 18, the oil inlet pipe 101 is located below the oil chamber 110, and the oil outlet pipe 102 is located below the oil chamber 110, so that oil enters the oil chamber 110 from below the oil chamber 110, and simultaneously flows out of the oil chamber 110 from below, without interfering with the observation of the oil level.

Referring to fig. 18 to 19, in this alternative, the oil outlet guide chamber 312 is located outside the guide 320, and the oil inlet guide chamber 311 is located inside the guide 320.

18-19, A partition plate opening is formed in the middle of the partition plate 300, and the oil inlet guide cavity 311 is communicated with the oil inlet cavity 111 through the partition plate opening. The side wall of the partition plate 300 is spaced from the inner wall of the housing 100, so that the oil outlet guide cavity 312 is communicated with the oil outlet cavity 112, and positions of the oil inlet guide cavity 311 and the oil outlet guide cavity 312 are matched with positions of the oil inlet cavity 111 and the oil outlet cavity 112.

To accommodate the above structure, the oil inlet chamber 111, the oil passing passage 323, and the collecting chamber 150 are sequentially communicated. In this scheme, the collecting chamber 150 can be used for collecting the oil before filtering, and simultaneously, the impurity in the oil also can be discharged into the collecting chamber 150, and the user can open the drain valve 151 to drain the oil in the collecting chamber 150.

With continued reference to fig. 18-19, the housing 100 includes a base 130 and an upper shell 140 mounted to the base 130, which may be a threaded connection in particular. The upper case 140 is made of a light-transmitting material so that a user can observe the inside of the case 100 obliquely upward.

The embodiment also provides a vehicle comprising the fuel filter and having the same technical effects as the fuel filter.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. The fuel filter is characterized by comprising an exhaust structure, a shell (100) and a filter assembly (200),

The housing (100) having an oil chamber (110), the venting structure being mounted within the oil chamber (110);

The filter assembly (200) is arranged in the oil cavity (110) and divides the oil cavity (110) into an oil inlet cavity (111) and an oil outlet cavity (112), the filter assembly (200) comprises a filter element (210) and an upper end cover (220), the filter element (210) is configured to only allow oil to pass through, the upper end cover (220) is provided with an upper end cover opening (221), the upper end cover opening (221) is used for communicating the oil inlet cavity (111) and the oil outlet cavity (112), and the exhaust structure is connected to the upper end cover (220);

The exhaust structure includes:

the exhaust pipe (1) is provided with a first end (11) connected to the upper end cover (220) and a second end (12) extending towards the interior of the oil outlet cavity (112), and the oil outlet cavity (112), the inner cavity of the exhaust pipe (1) and the upper end cover opening (221) are communicated in sequence;

The density of the floating ball (2) is smaller than that of oil in the oil outlet cavity (112), and the floating ball (2) can seal the second end (12) so as to separate the inner cavity of the exhaust pipe (1) from the oil outlet cavity (112);

The fuel filter further includes:

The pressure detection device comprises a pressure detection tube (500), a pressure identifier (510) and a pressure tube elastic piece (520), wherein the pressure detection tube (500) is made of a light-transmitting material, and an oil inlet tube (101) and an oil outlet tube (102) are respectively connected with two ends of the pressure detection tube (500); the pressure identifier (510) is movably arranged in the inner cavity of the pressure detection tube (500) and can move along with the change of oil pressure at two sides;

The pressure detection pipe (500) comprises a first pipe section (501), a second pipe section (502) and a third pipe section (503) which are sequentially connected, wherein the first pipe section (501) is connected with the oil inlet pipe (101), and the third pipe section (503) is connected with the oil outlet pipe (102); the second pipe section (502) extends along the horizontal direction, the extending direction of the first pipe section (501) forms an angle with the horizontal direction, the extending direction of the third pipe section (503) forms an angle with the horizontal direction, and the pressure identifier (510) is movably arranged in the second pipe section (502);

A first limiting piece (5021) is arranged on the inner wall of the second pipe section (502) close to one end of the first pipe section (501) in a protruding mode, and the first limiting piece (5021) is used for preventing the pressure mark piece (510) from entering the first pipe section (501); a second limiting piece (5022) is arranged on the inner wall of the second pipe section (502) close to one end of the third pipe section (503) in a protruding mode, and the second limiting piece (5022) is used for preventing the pressure identifier (510) from entering the third pipe section (503);

the pressure pipe elastic pieces (520) are arranged in two, and the two pressure pipe elastic pieces (520) are respectively arranged at two sides of the pressure mark piece (510).

2. The fuel filter according to claim 1, characterized in that the second end (12) is provided with an upper accommodating groove (13), the inner cavity of the exhaust pipe (1) is communicated with the upper accommodating groove (13), and the floating ball (2) can be attached to the groove wall of the upper accommodating groove (13) so as to separate the inner cavity of the exhaust pipe (1) from the oil outlet cavity (112).

3. The fuel filter according to claim 1, further comprising a float seat (3), wherein the float ball (2) is movable between a blocking position and a separating position, wherein the float ball (2) blocks the second end (12) when the float ball (2) is in the blocking position, and wherein the float ball (2) is separated from the second end (12) and is supportable on the float seat (3) when the float ball (2) is in the separating position.

4. A fuel filter according to claim 3, characterized in that the distance between the end of the float seat (3) and the second end (12) is smaller than the diameter of the float (2).

5. A fuel filter according to claim 3, characterized in that the float seat (3) has a lower receiving groove (31), the float (2) being supported on the groove wall of the lower receiving groove (31) when the float (2) is in the separated position.

6. The fuel filter according to claim 5, characterized in that the float seat (3) has a through hole, one end of which communicates with the lower receiving groove (31) and the other end communicates with the oil outlet chamber (112).

7. The fuel filter according to any one of claims 1 to 6, further comprising an exhaust passage structure (4) provided to the upper end cover (220), the exhaust passage structure (4) being located in the oil intake chamber (111) and having an exhaust passage (41), the upper end cover opening (221) communicating with the oil intake chamber (111) through the exhaust passage (41), the exhaust passage structure (4) comprising a base (42) provided to the upper end cover (220) and an extension piece (43) provided to the base (42), the extension piece (43) extending in a vertical direction, the exhaust passage (41) penetrating the extension piece (43).

8. The fuel filter according to claim 7, further comprising a base elastic member (44), one end of the base elastic member (44) being connected to the housing (100) and the other end being connected to the exhaust passage structure (4), the base elastic member (44) being configured to provide an elastic force for abutting the exhaust passage structure (4) against the upper end cap (220).

9. A vehicle comprising the fuel filter of claim 1.