CN116242528A - Pressure warning device, fuel filter and vehicle - Google Patents

Abstract

The invention belongs to the technical field of vehicles, and discloses a pressure warning device, a fuel filter and a vehicle, wherein the pressure warning device is used for being arranged on an oil inlet pipe or an oil outlet pipe of the fuel filter; the first elastic piece is used for providing an elastic force for enabling the indicator to slide so as to enable the indicator to be always abutted against the diaphragm, and therefore the elastic force is applied to the diaphragm; when the pressure of the first cavity is normal, the sum of the elastic force of the first elastic piece and the pressure of the second cavity is balanced with the pressure of the first cavity. When the pressure of the first cavity is reduced, the stress conditions at the two ends of the diaphragm are changed, and the first elastic piece drives the indicating piece to move towards the direction of the first cavity, so that the stress at the two sides of the diaphragm is balanced.

Description

Pressure warning device, fuel filter and vehicle

technical field

The invention relates to the technical field of vehicles, in particular to a pressure warning device, a fuel filter and a vehicle.

Background technique

In the fuel filter, the fuel is filtered through the filter element to remove impurities in the fuel. Existing fuel filters generally include a housing and a filter element arranged in the housing. The oil flows into the oil inlet chamber in the housing from the oil inlet pipeline, enters the oil outlet chamber after being filtered by the filter element, and is discharged from the oil outlet pipeline. During the operation of the fuel filter, it is necessary to monitor the oil pressure of the oil inlet pipe or the oil outlet pipe to prevent the pressure difference between the oil inlet pipe and the oil outlet pipe from being too large.

The traditional solution usually installs a pressure sensor on the oil inlet or outlet pipe for pressure detection, but the detection accuracy of this solution depends on the accuracy of the pressure sensor, and once the pressure sensor is damaged, the detection result will be wrong.

Contents of the invention

According to one aspect of the present invention, the present invention provides a pressure alarm to solve the problem that when a pressure sensor is set for pressure detection in the prior art, its detection accuracy depends on the accuracy of the pressure sensor, and once the pressure sensor is damaged, the detection result will be wrong question.

For reaching above-mentioned purpose, the present invention adopts following technical scheme:

The pressure warning device is used to install the oil inlet pipe or oil outlet pipe of the fuel filter;

include:

The alarm shell has an alarm cavity;

Diaphragm, arranged in the inner cavity of the alarm, and divides the inner cavity of the alarm into a first cavity and a second cavity, the first cavity can be connected with the inner cavity of the oil inlet pipe or the oil outlet pipe The inner cavity is connected, and the diaphragm can be deformed along the first direction;

an indicator, slidably disposed in the second cavity along the first direction;

The first elastic member is used to provide an elastic force to make the indicator slide, so that the indicator is always pressed against the diaphragm.

As a preferred solution of the pressure alarm, the alarm housing includes an alarm body and an identification structure connected to the alarm body, the diaphragm is arranged on the alarm body, and the indicator is slidably arranged on the An identification structure, the identification structure is made of a light-transmitting material.

As a preferred solution of the pressure warning device, a scale mark is provided on the mark structure.

As a preferred solution for pressure alarms, it also includes:

The push rod is slidably arranged in the first cavity along the first direction;

The second elastic member is used to provide an elastic force for sliding the push rod, so that the push rod always abuts against the diaphragm.

As a preferred solution of the pressure alarm, the main body of the alarm has a push rod chute communicating with the first chamber, the push rod includes a push rod slider and a baffle provided on the push rod slider, so The push rod slider can slide along the first direction relative to the push rod chute, the blocking piece is slidably arranged in the first cavity along the first direction, and the push rod slider and the push rod chute The side wall of the push rod chute is provided with an interface, and the interface communicates with the first cavity.

As a preferred solution of the pressure alarm, the push rod slider can slide along the first direction to have a closed position and a conduction position. When the push rod slider is in the closed position, the push rod slider closes the interface, so that the inner cavity of the oil inlet pipe is separated from the interface, or the inner cavity of the oil outlet pipe is separated from the interface; when the push rod slider is in the conduction position, the push rod slider opens the The interface, the lumen of the oil inlet pipe or the lumen of the oil outlet pipe communicates with the interface.

As a preferred solution of the pressure alarm, the outer wall of the baffle is attached to the wall of the first cavity, and the baffle is provided with diversion holes, and the first cavity located at both ends of the baffle passes through the The diversion hole is connected.

As a preferred solution of the pressure alarm, the indicator is provided with an abutting portion, and the abutting portion can abut against an end of the marking structure away from the main body of the alarm.

According to another aspect of the present invention, a fuel filter is provided, including the above-mentioned pressure warning device, and also includes a fuel inlet pipe and a fuel outlet pipe, and the pressure warning device is arranged on the fuel inlet pipe or the fuel outlet pipe.

According to still another aspect of the present invention, a vehicle is provided, including the above-mentioned fuel filter.

The beneficial effects of the present invention are:

The invention provides a pressure alarm, which is used to be arranged on an oil inlet pipe or an oil outlet pipe of a fuel filter. The pressure alarm includes an alarm housing, a diaphragm, an indicator and a first elastic member. The alarm housing has an inner cavity of the alarm, and the diaphragm is arranged in the inner cavity of the alarm, and divides the inner cavity of the alarm into a first cavity and a second cavity. The first cavity can be connected with the inner cavity of the oil inlet pipe or the inner cavity of the oil outlet pipe. connected, the diaphragm can be deformed along the first direction. The indicating member is slidably disposed in the second chamber along the first direction, and the first elastic member is used to provide elastic force for sliding the indicating member, so that the indicating member is always pressed against the diaphragm, thereby applying the elastic force to the diaphragm. The pressure of the first chamber is generally greater than the pressure of the second chamber. When the pressure of the first chamber is normal, the sum of the elastic force of the first elastic member and the pressure of the second chamber is balanced with the pressure of the first chamber. When the pressure in the first chamber decreases, the stress on both ends of the diaphragm changes, and the first elastic member drives the indicator to move toward the first chamber, so that the forces on both sides of the diaphragm are balanced. At this time, the oil pressure of the first chamber can be judged quantitatively by the position of the indicating member, so as to judge whether the inner chamber oil pressure of the oil inlet pipe or the oil outlet pipe is normal.

The present invention also provides a fuel filter, including the above-mentioned pressure warning device, the user can quantitatively judge the oil pressure of the first chamber through the position of the indicator of the pressure warning device, so as to judge the inner cavity oil pressure of the oil inlet pipe or the oil outlet pipe Is it normal.

The present invention also provides a vehicle including the above-mentioned fuel filter and having the same effect as the above-mentioned fuel filter.

Description of drawings

Fig. 1 is a schematic structural view of a fuel filter in an embodiment of the present invention;

Fig. 2 is a sectional view of a fuel filter in an embodiment of the present invention;

Fig. 3 is the enlarged view of place A in Fig. 2;

Fig. 4 is the enlarged view of place B in Fig. 2;

Figure 5 is an enlarged view at C in Figure 2;

Figure 6 is an enlarged view at D in Figure 2;

Fig. 7 is a sectional view of a pressure detection tube in an embodiment of the present invention;

Fig. 8 is a sectional view of another pressure detection tube in an embodiment of the present invention;

Figure 9 is an enlarged view at E in Figure 8;

Fig. 10 is a schematic structural diagram of a pressure alarm in an embodiment of the present invention;

Fig. 11 is a structural schematic diagram 1 of another fuel filter in the embodiment of the present invention;

Fig. 12 is a sectional view of another fuel filter in an embodiment of the present invention;

Figure 13 is an enlarged view at F in Figure 12;

Figure 14 is an enlarged view at G in Figure 12;

Fig. 15 is a structural schematic diagram II of another fuel filter in the embodiment of the present invention;

Figure 16 is an enlarged view at H in Figure 15;

Fig. 17 is a schematic structural view of another fuel filter in an embodiment of the present invention;

Fig. 18 is a sectional view of another fuel filter in an embodiment of the present invention;

Fig. 19 is an enlarged view of position I in Fig. 18 .

In the picture:

100, housing; 101, oil inlet pipe; 102, oil outlet pipe; 110, oil chamber; 111, oil inlet chamber; 112, oil outlet chamber; 120, groove; 130, base, 140, upper shell; 150, collection chamber ; 151, drain valve;

200, filter assembly; 210, filter element; 211, window; 212, light-transmitting member; 220, upper end cover; 221, upper end cover opening;

300, partition plate; 310, diversion chamber; 311, oil inlet diversion chamber; 312, oil outlet diversion chamber; 320, diverter; 321, inner diverter; 322, outer diverter; 323, Oil passage; 330, holding tank;

400, oil discharge pipe; 410, oil suction hole;

500, pressure detection tube; 501, first pipe section; 502, second pipe section; 5021, first limit piece; 5022, second limit piece; 503, third pipe section; 510, pressure identification piece; 520, pressure tube elastic parts;

1. Exhaust pipe; 11. First end; 12. Second end; 13. Upper accommodating tank;

10. Air duct; 14. Chute;

2. Floating ball;

3. Floating ball seat; 31. Lower accommodation tank;

4. Exhaust passage structure; 41. Exhaust passage; 42. Base; 43. Extension piece; 44. Base elastic piece;

5. Float; 51. Sliding part; 52. Blocking part; 53. Limiting part;

6. Alarm shell; 61. First cavity; 62. Second cavity; 63. Alarm body; 64. Marking structure; 65. Push rod chute; 66. Interface;

7. Diaphragm;

8. Indicating part; 81. First elastic part; 82. Contact part;

9, push rod; 91, second elastic member; 92, push rod slider; 93, retaining piece; 94, diversion hole.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

In the description of this embodiment, the terms "up", "down", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations. It is not intended to indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and thus should not be construed as limiting the invention.

The existing fuel filter generally includes a housing and a filter element arranged in the housing. The oil flows into the oil inlet chamber in the housing from the oil inlet pipeline, enters the oil outlet chamber after being filtered by the filter element, and is discharged from the oil outlet pipeline. During the operation of the fuel filter, it is necessary to monitor the oil pressure of the oil inlet pipe or the oil outlet pipe to prevent the pressure difference between the oil inlet pipe and the oil outlet pipe from being too large. The traditional solution usually installs a pressure sensor on the oil inlet or outlet pipe for pressure detection, but the detection accuracy of this solution depends on the accuracy of the pressure sensor, and once the pressure sensor is damaged, the detection result will be wrong.

In view of the above problems, this embodiment provides a pressure alarm to solve the problem that when a pressure sensor is installed for pressure detection in the prior art, the detection accuracy depends on the accuracy of the pressure sensor, and once the pressure sensor is damaged, the detection result will be wrong. problem, which can be used in the field of vehicle technology.

Referring to Figures 1-10, this embodiment provides a fuel filter, specifically a primary fuel filter or other filters, the fuel filter includes a housing 100 and a filter assembly 200, the housing 100 has an oil cavity 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 includes a filter element 210 and an upper end cover 220. The filter element 210 is configured to only allow oil to pass through, and From the oil inlet chamber 111 to the oil outlet chamber 112 , the dirty oil in the oil inlet chamber 111 is filtered, and the filtered oil enters the oil outlet chamber 112 .

Continuing to refer to FIG. 1-FIG. 10, the fuel filter also includes an oil inlet pipe 101 and an oil outlet pipe 102. The oil inlet pipe 101 is arranged in the housing 100, and the inner cavity of the oil inlet pipe 101 communicates with the oil chamber 110, specifically, the interior of the oil inlet pipe 101. The chamber is connected to the oil chamber 111, so that the oil in the oil inlet pipe 101 enters the oil inlet chamber 111; The chamber communicates with the oil outlet chamber 112 to discharge the oil in the oil outlet chamber 112 through the oil outlet pipe 102 .

Optionally, 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, wherein the oil inlet pipe 101 is connected to the lower side wall of the housing 100 so that the oil inlet pipe 101 The inner chamber of the oil outlet pipe 102 communicates with the oil inlet chamber 111, and the oil outlet pipe 102 is connected to the lower part of the housing 100, so that the inner chamber of the oil outlet pipe 102 communicates with the oil outlet chamber 112.

Continuing to refer to FIGS. 1-10 , the fuel filter further includes an exhaust structure for being installed in the oil cavity 110 of the casing 100 . The upper end cover 220 has an upper end cover opening 221, and the upper end cover 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 cover 220 and faces toward the oil outlet chamber 112. The second end 12 extending inward, the oil outlet chamber 112 , the inner chamber of the exhaust pipe 1 and the upper end cover 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.

Continuing to refer to Fig. 1-Fig. 10, the exhaust structure also includes a floating ball 2, the density of the floating ball 2 is lower than the density of the oil in the oil outlet chamber 112, so that the float 2 can follow the oil liquid in the oil outlet chamber 112 The liquid level rises and floats up, and the float ball 2 can block the second end 12, so that the inner cavity of the exhaust pipe 1 is separated from the oil outlet chamber 112, thereby separating the oil outlet chamber 112 and the oil inlet chamber 111, when the oil outlet chamber 112 When the oil liquid level rises, prevent the dirty oil located in the oil inlet chamber 111 from entering the oil outlet chamber 112 through the exhaust pipe 1, and prevent the oil in the oil outlet chamber 112 from being polluted. In addition, since the second end 12 of the exhaust pipe 1 extends toward the oil outlet chamber 112, the second end 12 can be blocked by the float 2 when the liquid level in the oil outlet chamber 112 is low, separating the oil outlet. The chamber 112 and the oil inlet chamber 111 are suitable for situations where the pressure difference between the oil inlet chamber 111 and the oil outlet chamber 112 is relatively large, resulting in a relatively large liquid level difference between the oil inlet chamber 111 and the oil outlet chamber 112 . Optionally, the second end 12 extends in a vertical direction.

Continuing to refer to Fig. 1-Fig. 10, the second end 12 is provided with an upper accommodating groove 13, the inner cavity of the exhaust pipe 1 communicates 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 chamber of the exhaust pipe 1 is separated from the oil outlet chamber 112 . The separation between the inner chamber of the exhaust pipe 1 and the oil outlet chamber 112 is realized by the way that the floating ball 2 is attached to the groove wall of the upper receiving groove 13, and the sealing effect is good. Optionally, the groove wall of the upper accommodating groove 13 is spherical, so that the floating ball 2 and the groove wall of the upper accommodating groove 13 can be completely attached.

Continuing to refer to Fig. 1-Fig. 10, the exhaust structure also includes a floating ball seat 3, the floating ball 2 can move between the blocking position and the separation position, when the floating ball 2 is in the blocking position, the floating ball 2 blocks the second End 12, when the float 2 is in the separated position, the float 2 is separated from the second end 12 and can be supported on the float seat 3, so as to avoid that when the oil level in the oil outlet chamber 112 is low, the float 2 Continues to drop as the oil level changes.

Continuing to refer to Fig. 1-Fig. 10, the problem still existing in the above-mentioned structure is that when the oil liquid level in the oil outlet chamber 112 is low, the floating ball 2 descends to the separation position, and the floating ball 2 is separated from the second end 12 , when the float 2 is located directly below the second end 12, the float 2 can smoothly float up to the second end 12 as the oil level rises, and fit the second end 12, but if the float 2 The floating of the oil outlet cavity 112 will cause the position of the floating ball 2 to shift, and then cause the floating ball 2 to fail to float up to the vicinity of the second end 12, and the sealing cannot be completed. In this regard, in this embodiment, the distance between the end of the float seat 3 and the second end 12 is smaller than the diameter of the float 2, so as to prevent the float 2 from moving from between the float seat 3 and the second end 12 to the surrounding area. Float, so that the float 2 can always be located between the float seat 3 and the second end 12 .

Continuing to refer to FIG. 1-FIG. 10 , the ball float seat 3 has a lower accommodation groove 31 , and when the float ball 2 is in the separated position, the float ball 2 is supported on the wall of the lower accommodation groove 31 to improve the stability of the support. Optionally, the groove wall of the lower accommodating groove 31 is in the shape of a ball, so that the floating ball 2 and the groove wall of the lower accommodating groove 31 can be completely attached to further improve the stability of the support.

Continuing to refer to Fig. 1-Fig. 10, when the oil liquid level in the oil outlet chamber 112 rises, the oil liquid can be outside the lower accommodation tank 31, and exert buoyancy on the float ball 2 along the side of the float ball 2, but Obviously, the buoyancy force exerted on the buoyant ball 2 along the side is relatively small, and there may be situations where the buoyant ball 2 cannot be floated smoothly. For this, the ball float seat 3 has a through hole, one end of the through hole communicates with the lower receiving groove 31, and the other end communicates with the oil chamber 112, so that the oil can directly pass through the through hole and exert buoyancy on the float 2 along the bottom of the float 2 , so that the float 2 can float up smoothly. Optionally, the ball float seat 3 is tubular and extends vertically, and the through hole is the central hole of the ball float seat 3 to simplify the overall structure of the ball float seat 3 .

Continuing to refer to Figures 1-10, the exhaust structure also includes an exhaust channel structure 4 arranged on the upper end cover 220, 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 is connected to the oil inlet The cavity 111 communicates with the exhaust passage 41. The exhaust passage structure 4 includes a base 42 arranged on the upper end cover 220 and an extension 43 arranged on the base 42. The extension 43 extends vertically, and the exhaust passage 41 runs through the extension 43. . This setting can make the exhaust passage 41 extend upwards, so that the oil liquid level in the oil inlet chamber 111 needs to rise to a higher level before entering the exhaust passage 41, so as to further prevent the oil in the oil inlet chamber 111 from entering the exhaust passage 41. Gas channel 41. Optionally, the casing 100 has a groove 120 for accommodating the extension piece 43 , and the side wall of the groove 120 is spaced apart from the outer wall of the extension piece 43 to facilitate the passage of gas.

Continuing to refer to FIGS. 1-10 , the exhaust structure also 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 passage structure 4, and the base elastic member 44 is used to provide the exhaust passage structure. 4 is pressed against the elastic force of the upper end cover 220, specifically, the base elastic member 44 is connected to the base 42 of the exhaust passage structure 4, so that the base 42 is pressed against the upper end cover 220, and the sealing between the base 42 and the upper end cover 220 is improved. sex. In some embodiments, the filter assembly 200 is installed on the lower wall of the oil chamber 110 , and the base elastic member 44 can simultaneously press the filter assembly 200 against the lower wall of the oil chamber 110 .

Continuing to refer to Figures 1-10, the fuel filter of this embodiment includes the above-mentioned exhaust structure, and also includes a housing 100 and a filter assembly 200, the housing 100 has an oil chamber 110, and the exhaust structure is installed in the oil chamber 110; The filter assembly 200 is arranged 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 cover 220. The filter element 210 is configured to only allow oil to pass through, and the upper end The cover 220 has an upper end cover opening 221 for communicating with the oil inlet chamber 111 and the oil outlet chamber 112 , and the exhaust structure is connected to the upper end cover 220 . The exhaust structure can make the oil outlet chamber 112 communicate with the oil inlet chamber 111 to balance the pressure of the oil outlet chamber 112 and the oil inlet chamber 111. The oil level in the oil chamber 112 rises and floats up, preventing the dirty oil in the oil inlet chamber 111 from entering the oil outlet chamber 112 through the exhaust pipe 1, and preventing the oil in the oil outlet chamber 112 from being polluted.

Continuing to refer to Fig. 1-Fig. 10, the fuel filter also includes an oil discharge pipe 400, the oil discharge pipe 400 is arranged on the lower cavity wall of the oil outlet chamber 112 and extends toward the inside of the oil outlet chamber 112, and both ends of the oil discharge pipe 400 are provided with openings , the oil outlet chamber 112 , the lumen of the oil outlet pipe 400 and the inner chamber of the oil outlet pipe 102 are connected in sequence, so that the oil in the oil outlet chamber 112 can flow into the oil outlet pipe 102 through the oil outlet pipe 400 .

Continuing to refer to Fig. 1-Fig. 10, an oil suction hole 410 is provided on the side wall of the oil discharge pipe 400, and the oil suction hole 410 communicates with the inner cavity of the oil discharge pipe 400 and the oil outlet cavity 112. Since both ends of the oil discharge pipe 400 are provided with openings, it is located The oil in the oil discharge chamber 112 can enter the inner cavity of the oil discharge pipe 400 through the opening of the oil discharge pipe 400 located in the oil discharge chamber 112, that is, enter the inner cavity of the oil discharge pipe 400 through the opening on the upper end surface of the oil discharge pipe 400, or through the opening of the oil discharge pipe 400. The oil suction hole 410 enters the inner cavity of the oil discharge pipe 400 . In addition, since the oil discharge pipe 400 extends toward the oil outlet cavity 112 , the height of the oil suction hole 410 is lower than the opening height of the upper end surface. When the pressure in the oil outlet chamber 112 decreases, causing the oil liquid level in the oil outlet chamber 112 to be lower than the opening on the upper surface of the oil discharge pipe 400, the oil can enter the inner cavity of the oil discharge pipe 400 through the oil suction hole 410, thereby smoothly into the oil outlet pipe 102, so that the engine using the fuel filter can be started smoothly.

Continuing to refer to Fig. 1-Fig. 10, it can be understood that as the engine starts, the oil pump will gradually draw out the air in the oil outlet chamber 112, so that the oil liquid level in the oil outlet chamber 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 discharge pipe 400 through the opening on the upper end surface. 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 also be reduced. In this regard, the cross-sectional area of the opening of one end of the oil discharge pipe 400 extending into the oil outlet chamber 112 is smaller than the cross-sectional area of the oil suction hole 410, so as to reduce the flow of oil through the oil suction hole 410, and minimize the flow of the oil suction hole 410 in the oil outlet chamber 112. The impact on the utilization rate of the filter element 210 when the liquid level is high.

Continuing to refer to FIGS. 1-10 , the oil discharge pipe 400 is provided with a plurality of oil suction holes 410 arranged at intervals along the circumferential direction so that oil can flow into the oil discharge pipe 400 in different directions. Optionally, the sum of the cross-sectional areas of the plurality of oil suction holes 410 is still smaller than the cross-sectional area of the opening on the upper end surface.

Continuing to refer to FIG. 1-FIG. 10, the fuel filter further includes a partition plate 300 and an oil inlet pipe 101 disposed on the housing 100, the partition plate 300 is disposed on the housing 100, and the oil chamber 110 is located above the partition plate 300, Such that the upper surface of the partition plate 300 constitutes the lower cavity wall of the oil cavity 110 . The oil discharge pipe 400 is arranged on the partition plate 300, and the lower surface of the partition plate 300 and the casing 100 enclose a diversion chamber 310, and a diversion member 320 is arranged in the diversion chamber 310, and the diversion member 320 separates the diversion chamber 310 The oil inlet guide chamber 311 and the oil outlet guide chamber 312, the inner cavity of the oil inlet pipe 101, the oil inlet guide chamber 311 and the oil inlet chamber 111 are connected in sequence, and the inner chamber of the oil outlet pipe 102, the oil outlet guide chamber 312, The inner cavity of the oil discharge pipe 400 and the oil outlet cavity 112 are connected in sequence. Wherein, since 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. In order to match the positions of the oil inlet chamber 111 and the oil outlet chamber 112, the oil outlet channel The cavity 312 is located inside the deflector 320 , and the oil inlet guide cavity 311 is located outside the deflector 320 .

Continuing to refer to FIG. 1-FIG. 10 , the middle part of the partition plate 300 is provided with a partition plate opening, and the oil outlet guide chamber 312 communicates 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 discharge pipe 400 passes through the partition plate opening to communicate with the oil outlet flow chamber 312 and the oil outlet chamber 112, wherein the oil discharge pipe 400 can be arranged in the flow guide 320, and the flow guide 320 is sleeved on the oil discharge pipe 400. Optionally, the outer wall of the oil discharge pipe 400 is attached to the inner wall of the flow guide 320, so that the oil can only enter the oil outlet chamber 112 through the oil discharge pipe 400 Oil outlet guide chamber 312.

Continuing to refer to FIGS. 1-10 , the side wall of the partition plate 300 is spaced from the inner wall of the housing 100 so that the oil inlet guide chamber 311 communicates with the oil inlet chamber 111 so that the oil can flow from the side of the partition plate 300 The gap between the wall and the inner wall of the housing 100 passes through and enters the oil inlet chamber 111 .

Continuing to refer to FIG. 1-FIG. 10, the deflector 320 includes an inner deflector 321 and an outer deflector 322 sleeved on the inner deflector 321. The outer deflector 322 is connected to the side wall of the partition opening, and the inner deflector 322 is The flow guide 321 and the outer flow guide 322 are arranged at intervals, and there is an oil passage 323 between the inner flow guide 321 and the outer flow guide 322, and the housing 100 also has a collection chamber 150 located below the oil passage 323. The oil chamber 112 , the oil passage 323 and the collection chamber 150 communicate in sequence. The collection chamber 150 can be used to collect the filtered oil. Optionally, a drain port is opened on the wall of the collection chamber 150 and a drain valve 151 is provided. The drain valve 151 is used to open or close the drain port.

1-10, the upper surface of the partition plate 300 is provided with a receiving groove 330, and the lower end of the filter element 210 is installed in the receiving groove 330, so that the filter element 210 can be stably installed in the fuel filter.

Continuing to refer to Fig. 1-Fig. 10, the fuel filter also includes a pressure detection tube 500, a pressure identification part 510 and a pressure tube elastic part 520. Both ends of the pressure detection tube 500 are connected, so that the inner cavity of the oil inlet tube 101 and the inner cavity of the oil outlet tube 102 communicate with the inner cavity of the pressure detection tube 500 at the same time. The pressure marker 510 is movably arranged in the inner cavity of the pressure detection tube 500, and can move with the change of the oil pressure on both sides, so that when the oil pressure in the inner cavity of the oil inlet pipe 101 or the inner cavity of the oil outlet pipe 102 changes, it will As a result, the pressure difference between the lumen of the oil inlet pipe 101 and the lumen of the oil outlet pipe 102 changes, which in turn drives the movement of the pressure marker 510 , and the user can judge the change of oil pressure on both sides through the movement of the pressure marker 510 . Optionally, the pressure marker 510 is always in contact with the inner wall of the pressure detection tube 500 to form a seal to prevent oil from passing through, so that the pressure marker 510 can move under the action of oil pressure, preventing the oil leakage from causing the measurement result error, while preventing the oil in the oil outlet pipe 102 from being polluted. In this embodiment, the pressure marker 510 is spherical, and in other embodiments, it may also be cylindrical.

Optionally, one end of the pressure tube elastic member 520 is connected to the inner wall of the pressure detection tube 500, and the other end is connected to the pressure marker 510. After the oil drives the pressure marker 510 to move, the pressure tube elastic member 520 is used to provide pressure markers. The elastic force for restoring the part 510. Changes in the pressure difference between the lumen of the oil inlet pipe 101 and the lumen of the oil outlet pipe 102 will cause the displacement of the pressure marker 510 and elastic deformation of the elastic member 520 of the pressure pipe, and the displacement of the pressure marker 510 will be different. , the elastic force provided by the pressure tube elastic member 520 is different, so the elastic force on the pressure indicator 510 at this time can be obtained through the displacement of the pressure indicator 510, and then the pressure difference of the oil on both sides of the pressure indicator 510 can be obtained , so as to quantitatively analyze the pressure difference of the oil on both sides of the pressure marker 510 .

1-10, the pressure detection pipe 500 includes a first pipe section 501, a second pipe section 502 and a third pipe section 503 connected in sequence, the first pipe section 501 is connected to the oil inlet pipe 101, and the third pipe section 503 is connected to the oil outlet pipe 102, so that The lumens of the oil inlet pipe 101 , the first pipe section 501 , the second pipe section 502 , the third pipe section 503 and the oil outlet pipe 102 are connected in sequence. The second pipe section 502 extends along the horizontal direction, the extension direction of the first pipe section 501 forms an angle with the horizontal direction, and the extension direction of the third pipe section 503 forms an angle with the horizontal direction. Due to the influence of the gravity of the pressure marker 510 itself on the detection result.

1-10, the inner wall of the second pipe section 502 near the end of the first pipe section 501 is protruded with a first stopper 5021, and the first stopper 5021 is used to prevent the pressure indicator 510 from entering the first pipe section 501; The inner wall of the second pipe section 502 close to the third pipe section 503 protrudes from the second stopper 5022 , and the second stopper 5022 is used to prevent the pressure marker 510 from entering the third pipe section 503 . The pressure marker 510 can be prevented from leaving the second pipe section 502 by the first limiter 5021 and the second limiter 5022 , preventing the pressure marker 510 from moving too much.

Optionally, the side wall of the second pipe section 502 is provided with a pressure scale mark, so that the user can visually observe the displacement of the pressure mark 510 through the scale mark, and then obtain the pressure difference of the oil on both sides of the pressure mark 510 . Preferably, the scale mark is a plurality of scale lines arranged in parallel and at intervals, at least part of the scale lines are provided with digital marks, and scale lines of different colors can also be used for marking to facilitate reading.

Continuing to refer to FIG. 1-FIG. 10, there are two pressure tube elastic parts 520, and the two pressure tube elastic parts 520 are respectively located on both sides of the pressure identification part 510. The two sides of the pressure marker 510 apply elastic force. Optionally, the two pressure pipe elastic members 520 are both arranged in the second pipe section 502, and both expand and contract in the horizontal direction.

It can be understood that the height of the oil inlet pipe 101 and the oil outlet pipe 102 will also affect the pressure difference of the oil on both sides of the pressure marker 510, so after obtaining the pressure difference of the oil on both sides of the pressure marker 510, it is necessary to consider The height difference between the second pipe section 502 and the oil inlet pipe 101 and the oil outlet pipe 102 is used to obtain the pressure difference between the inner chambers of the oil inlet pipe 101 and the oil outlet pipe 102 . Generally speaking, the oil pressure of the oil inlet pipe 101 is greater than the oil pressure of the oil outlet pipe 102, so in order to adapt to this characteristic, the height of the oil inlet pipe 101 is lower than the height of the oil outlet pipe 102, so as to make the oil pressure on both sides of the pressure indicator 510 as high as possible. maintain balance. In addition, the height of the oil inlet pipe 101 can also be higher than that of the oil outlet pipe 102 , so that the pressure marker 510 always has a tendency to move toward the side of the oil outlet pipe 102 .

Referring to FIG. 10 , the fuel filter in this embodiment further includes a pressure warning device, which is used for setting on the fuel inlet pipe 101 or the fuel outlet pipe 102 of the fuel filter. The pressure alarm includes an alarm housing 6 , a diaphragm 7 , an indicating member 8 and a first elastic member 81 . The warning device housing 6 has a warning device cavity, and the diaphragm 7 is arranged in the warning device cavity, and the warning device cavity is divided into a first cavity 61 and a second cavity 62, and the first cavity 61 can be connected with the cavity of the oil inlet pipe 101. Or the lumen of the oil outlet pipe 102 is connected, and the diaphragm 7 can be deformed along the first direction. The indicating member 8 is slidably disposed in the second chamber 62 along the first direction, and the first elastic member 81 is used to provide an elastic force to make the indicating member 8 slide, so that the indicating member 8 is always pressed against the diaphragm 7, so that the elastic force acts on diaphragm 7. The pressure of the first chamber 61 is generally greater than the pressure of the second chamber 62 , 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 in the first chamber 61 decreases, the force on both ends of the diaphragm 7 changes, and the first elastic member 81 drives the indicating member 8 to move toward the first chamber 61 to balance the forces on both sides of the diaphragm 7 . At this time, the oil pressure of the first chamber 61 can be judged quantitatively by the position of the indicator 8 , so as to judge whether the inner chamber oil pressure of the oil inlet pipe 101 or the oil outlet pipe 102 is normal.

Continuing to refer to Fig. 10, the warning device housing 6 includes a warning device main body 63 and an identification structure 64 connected to the warning device main body 63, the diaphragm 7 is arranged on the warning device main body 63, the first cavity 61 is located on one side of the diaphragm 7, and the diaphragm 7. The main body of the warning device 63 and the marking structure 64 together form the second cavity 62. The indicator 8 is slidably arranged on the marking structure 64. The marking structure 64 is made of a light-transmitting material so that the user can directly observe through the marking structure 64 The position of indicator 8.

Continuing to refer to FIG. 10 , scale markings are provided on the marking structure 64 , so that the user can visually observe the displacement of the indicating member 8 through the scale markings, and then obtain the oil pressure of the first chamber 61 . Preferably, the scale mark is a plurality of scale lines arranged in parallel and at intervals, at least some of the scale lines are provided with digital marks, and scale lines of different colors can also be used for marking, such as red, yellow and blue, etc., to facilitate reading, And more eye-catching.

Continuing to refer to FIG. 10 , the pressure alarm further includes a push rod 9 and a second elastic member 91 . The push rod 9 is slidably disposed in the first chamber 61 along the first direction, and the second elastic member 91 is used to provide an elastic force to make the push rod 9 slide, so that the push rod 9 is always in contact with the diaphragm 7, specifically, the push rod 9 and the indicator 8 abut against both sides of the diaphragm 7 respectively. The elastic force of the first elastic member 81 can be balanced by the second elastic member 91 to prevent excessive movement of the indicating member 8 and 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 , and then adjust the pressure indication range of the pressure alarm, so as to be suitable for different types of fuel filters.

Continuing to refer to FIG. 10 , the alarm main body 63 has a push rod chute 65 communicating with the first chamber 61 , the push rod 9 includes a push rod slider 92 and a blocking piece 93 arranged on the push rod slider 92 , the push rod slider 92 Can slide along the first direction relative to the push rod chute 65, specifically, part of the push rod slider 92 is slidably arranged on the push rod chute 65, and the other part protrudes outside the push rod chute 65, and the blocking piece 93 slides along the first direction Set in the first chamber 61, the push rod slider 92 is attached to the side wall of the push rod chute 65, and the side wall of the push rod chute 65 is provided with an interface 66, and the interface 66 communicates with the first chamber 61, so that the first The cavity 61 communicates with the inner cavity of the oil inlet pipe 101 or the oil outlet pipe 102 to facilitate the passage of oil. In addition, the push rod chute 65 is opened on the cavity wall of the first cavity 61 away from the indicator 8 , and one end of the second elastic member 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 . superior.

Continuing to refer to FIG. 10 , the push rod slider 92 can slide along the first direction to have a closed position and a conduction position. When the push rod slider 92 is in the closed position, the push rod slider 92 closes the interface 66 so that the oil inlet pipe 101 The inner cavity of the oil outlet pipe 102 is separated from the interface 66, or the inner cavity of the oil outlet pipe 102 is separated from the interface 66, preventing the oil in the first cavity 61 from passing through. When the push rod slider 92 is in the conduction position, the push rod slider 92 opens the port 66, and the lumen of the oil inlet pipe 101 or the lumen of the oil outlet pipe 102 communicates with the port 66. At this time, the oil can enter and exit the first port through the port 66. Cavity 61. It can be understood that when the oil pressure of the oil inlet pipe 101 or the oil outlet pipe 102 decreases, the indicator 8 moves toward the direction of the first chamber 61, at this time the push rod slider 92 will move from the conducting position to the closed position, and the pushing When the rod slider 92 is in the conduction position, the oil can normally enter and leave the first chamber 61 through the interface 66; Keep the oil pressure in the first chamber 61 constant, and now the push rod slider 92 moves only under the influence of the oil pressure difference between the first chamber 61 and the inner cavity of the oil inlet pipe 101 or the oil outlet pipe 102, so only when the When the oil pressure in the inner chamber of the oil pipe 101 or the oil outlet pipe 102 changes suddenly, the push rod slider 92 will continue to move toward the inner chamber of the oil inlet pipe 101 or the oil outlet pipe 102 after moving to the closed position. Displacement also occurs in part 8, so as to remind maintenance personnel to carry out maintenance as soon as possible.

Continuing to refer to FIG. 10 , the blocking piece 93 can abut against the cavity wall of the first cavity 61 away from the indicator 8 along the first direction, so that the movement of the blocking piece 93 along the first direction is more stable.

Continuing to refer to FIG. 10 , the outer wall of the baffle 93 is attached to the wall of the first chamber 61 , and the baffle 93 is provided with diversion holes 94 , and the first chamber 61 located at both ends of the baffle 93 communicates through the diversion holes 94 .

Continuing to refer to FIG. 10 , the indicator 8 is provided with an abutment portion 82, and the abutment portion 82 can abut against the end of the marking structure 64 away from the warning device main body 63, so as to limit the indicator 8 and prevent the indicator 8 from excessive displacement. At the same time, the abutment portion 82 can be used as a marking part of the indicator 8 , and the user can judge the position of the indicator 8 according to the position of the abutment portion 82 and the identification structure 64 .

11-16, this embodiment also provides a fuel filter with another exhaust structure, the exhaust structure of the fuel filter is also used to be installed in the oil chamber 110 of the housing 100, and through Another technical solution solves the problem that dirty oil may escape into the oil outlet chamber through the vent hole due to bumps or tilt of the fuel filter.

Continuing to refer to Fig. 11-Fig. 16, the exhaust structure includes an air duct 10, the air duct 10 is connected to the upper end cover 220 and has a chute 14, the inner cavity of the air duct 10 communicates with the opening 221 of the upper end cover, and the inner cavity of the air duct 10 The chamber and the oil outlet chamber 112 are communicated through the chute 14, so that the oil outlet chamber 112, the chute 14, the inner cavity of the air guide pipe 10, the upper end cover opening 221 and the oil inlet chamber 111 are connected in sequence, so that the oil outlet chamber 112 is connected to the inlet The oil chamber 111 balances the pressure of the oil outlet chamber 112 and the oil inlet chamber 111 to reduce the pressure difference.

Continuing to refer to Fig. 11-Fig. 16, the extension direction of the chute 14 forms an included angle with the horizontal plane; the exhaust structure also includes a float 5, which is movable in the inner cavity of the air duct 10 and is slidably matched with the chute 14. The density is lower than that of the oil in the oil outlet chamber 112, so that the float 5 can float up with the rise of the oil liquid level in the oil outlet chamber 112, and the float 5 can abut against the upper groove wall of the chute 14, so that the guide The inner chamber of the gas pipe 10 above the float 5 is separated from the oil outlet chamber 112, so that when the oil level of the oil outlet chamber 112 rises, the dirty oil located in the oil inlet chamber 111 is prevented from entering the oil outlet chamber through the air guide pipe 10, and the oil outlet chamber is avoided. The oil in the oil chamber 112 is contaminated. Optionally, the chute 14 extends vertically to facilitate the floating of the float 5. In addition, 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 chute 14, The float 2 is slidably arranged on the two slide grooves 14 at the same time.

Continuing to refer to Fig. 11-Fig. 16, the float 5 includes a sliding part 51 and a blocking part 52, the sliding part 51 is slidably arranged on the chute 14, the blocking part 52 is always attached to the inner wall of the airway 10, through the blocking part 52 and the The inner wall of the air duct 10 is bonded to separate the inner cavity of the air duct 10 from the oil outlet chamber 112 , and the sealing effect is good.

Continuing to refer to Figures 11-16, the sliding member 51 is also provided with a limiting member 53, the limiting member 53 and the blocking member 52 are respectively located on both sides of the chute 14, and the limiting member 53 and the blocking member 52 are used to limit sliding The part 51 breaks away from the chute 14, and the position of the float 2 can be limited by setting the limiting part 53, so that it can only slide relative to the air duct 10 along the extending direction of the chute 14, so as to prevent the float 2 from coming out of the chute 14 .

Continue referring to FIGS. 11-16 , the groove width of the chute 14 is smaller than the width of the blocking member 52 to prevent the blocking member 52 from coming out of the lumen of the airway 10 and prevent the float 5 from coming out of the chute 14 .

Continuing to refer to Fig. 11-Fig. 16, when the float 5 floats up to the top of the chute 14 with the rise of the oil liquid level in the oil outlet chamber 112, the sliding part 51 needs to be attached to the upper groove wall of the chute 14, so that The inner chamber of the air duct 10 above the float 5 is separated from the oil outlet chamber 112 . However, the separation is only realized by the sliding part 51 being attached to the upper groove wall of the chute 14, which is likely to cause liquid leakage. For this, in this embodiment, the height of the upper surface of the blocking part 52 is higher than that of the sliding part 51, so that when the sliding After the part 51 is attached to the upper groove wall of the chute 14, the part of the blocking part 52 higher than the sliding part 51 can still be attached to the inner wall of the air duct 10 to realize separation.

Continuing to refer to Fig. 11-Fig. 16, when the oil level in the oil outlet chamber 112 is low so that the floater 5 falls on the lower groove wall of the chute 14, the air duct 10 which is located below the floater 5 may The inner cavity is separated from the oil outlet chamber 112. At this time, as the oil level in the oil outlet chamber 112 rises, the oil can only exert buoyancy on the float 5 through the part of the float 5 protruding from the chute 14, such as through a stopper 53 or part of the sliding member 51 exerts a buoyancy force on the float 5, but obviously, the buoyancy force applied at this time is relatively small, and there may be a situation where the float 5 cannot be floated smoothly. In this regard, the end of the air guide tube 10 away from the upper end cover opening 221 communicates with the oil outlet chamber 112, so that the oil can enter the inner cavity of the air guide tube 10 from the oil outlet chamber 112 from the end far away from the upper end cover opening 221, so that the oil can be released. Apply buoyancy to the blocking member 52 of the float 5 directly through the through hole along the bottom of the float 5, so that the float 5 can float up smoothly.

This embodiment provides yet 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. The specific structure It has been described in detail above and will not be repeated here.

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, and the two ends of the window 211 are respectively connected to the oil inlet chamber 111 and the oil outlet chamber 112. fit to avoid oil leakage from the window 211. The user can visually observe the liquid level of the oil inlet chamber 111 and the oil outlet chamber 112 through the housing 100 and the light-transmitting member 212 , so as to determine whether the pressure difference between the oil inlet chamber 111 and the oil outlet chamber 112 is within a normal range. Optionally, the transparent member 212 is made of colorless and transparent material.

Optionally, 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 the user can directly observe through the part of the housing 100 made of light-transmitting material. The liquid level of the oil chamber 111 is observed, and the liquid level of the oil chamber 112 is observed through the light-transmitting member 212 again. In addition, in order to adapt to this structure, the oil inlet pipe 101 is tangent to the outer wall of the housing 100 , and the oil outlet pipe 102 passes through the middle part of the housing 100 .

Continuing to refer to Fig. 17, the window 211 is opened on the side wall of the filter core 210, and the height of the bottom of the part of the housing 100 made of the light-transmitting material is lower than the top of the light-transmitting member 212, so that the part of the shell made of the light-transmitting material The body 100 and the light-transmitting member 212 overlap vertically, which is convenient for users to observe. Wherein, the outer end surface of the transparent member 212 is flush with the outer wall surface of the filter element 210 , or the outer end surface of the transparent member 212 is arc-shaped, and the centerline of the transparent member 212 coincides with the axis of the filter element 210 . The inner end surface of the transparent member 212 is flush with the inner wall surface of the filter element 210 , or the inner end surface of the transparent member 212 is arc-shaped, and the centerline of the transparent member 212 coincides with the axis of the filter element 210 . In this embodiment, both the outer end surface and the inner end surface of the light-transmitting member 212 are arc-shaped.

Continuing to refer to FIG. 17 , the filter element 210 is provided with a plurality of windows 211, and the plurality of windows 211 are arranged at intervals along the circumferential direction of the filter element 210, and there are a plurality of light-transmitting members 212, and the plurality of light-transmitting members 212 are arranged in a plurality of windows one by one. 211, so that users can observe in different directions.

Optionally, the lower end surface of the filter element 210 is used to abut against the wall of the oil chamber 110 , and the filter assembly further includes an upper end cover 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 chamber 110, and the oil outlet pipe 102 is located below the oil chamber 110, so that the oil enters the oil chamber 110 from the bottom of the oil chamber 110 and flows out of the oil from below. The cavity 110 will not interfere with the observation of the oil level.

Generally speaking, 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. The user can observe the liquid in the oil inlet chamber 111 and the oil outlet chamber 112 through the light-transmitting member 212. surface height. But the problem that it exists is that the liquid level height of the oil inlet chamber 111 is generally higher than the liquid level height of the oil outlet chamber 112, and the user is easily affected by the oil inlet chamber 111 when observing the liquid level height of the oil outlet chamber 112 inside the filter element 210. oil interference.

For this, this embodiment provides an alternative solution, as shown in Figure 18, the oil inlet chamber 111 is located inside the filter element 210 and communicates with the inner cavity of the oil inlet pipe 101, the oil outlet chamber 112 is located outside the filter element 210, and It communicates with the lumen of the oil outlet pipe 102 . The user can directly observe the liquid level heights of the oil inlet chamber 111 and the oil outlet chamber 112 directly through the housing 100, and since the oil outlet chamber 112 with a lower oil level is located outside the filter element 210, the user can observe the The liquid level of the oil chamber 112 will not be disturbed.

In addition, exchanging the positions of the traditional oil inlet chamber 111 and oil outlet chamber 112, combined with the structure of the light-transmitting member 212 has an overall technical effect. Specifically, the oil outlet chamber 112 located outside the filter element 210 has a lower liquid level. The oil inlet chamber 111 located inside the filter element 210 has a higher liquid level, that is, the liquid level on both sides of the light-transmitting member 212 is different, and the liquid level on the side close to the observer is lower. The user can observe through the light-transmitting member 212. The liquid level difference on both sides of the optical element 212 is used to quantitatively analyze the pressure difference between the oil inlet chamber 111 and the oil outlet chamber 112 . Optionally, the light-transmitting member 212 is provided with a scale mark, and the scale mark is specifically a plurality of scale lines arranged in parallel and spaced along the vertical direction, so as to facilitate reading.

Continuing to refer to FIG. 18 , in order to adapt to the positions of the oil inlet chamber 111 and the oil outlet chamber 112 , the oil inlet pipe 101 passes through the middle part of the housing 100 , and the oil outlet pipe 102 is tangent to the outer wall of the housing 100 .

Continuing to refer 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 the oil enters the oil chamber 110 from the bottom of the oil chamber 110 and flows out of the oil chamber 110 from below, without Interference with observation of oil level.

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

Continuing to refer to FIG. 18-FIG. 19 , the middle part of the partition plate 300 is provided with a partition plate opening, and the oil inlet guide chamber 311 communicates with the oil inlet chamber 111 through the partition plate opening. The side wall of the partition plate 300 is spaced apart from the inner wall of the housing 100, so that the oil outlet guide chamber 312 communicates with the oil outlet chamber 112, so that the positions of the oil inlet guide chamber 311 and the oil outlet guide chamber 312 are in line with the inlet The positions of the oil chamber 111 and the oil outlet chamber 112 are matched.

In order to adapt to the above structure, the oil inlet chamber 111 , the oil passage 323 and the collection chamber 150 are connected in sequence. In this solution, the collection chamber 150 can be used to collect the oil before filtering, and at the same time, the impurities in the oil can also be discharged into the collection chamber 150, and the user can discharge the oil in the collection chamber 150 by opening the drain valve 151 liquid.

Continuing to refer to FIGS. 18-19 , the casing 100 includes a base 130 and an upper shell 140 installed on the base 130 , which may be screwed. The upper case 140 is made of light-transmitting material, so that the user can observe the inside of the housing 100 obliquely upward.

This embodiment also provides a vehicle, including the above-mentioned fuel filter, and has the same technical effect as the above-mentioned fuel filter.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. Various obvious changes, readjustments, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. The pressure warning device is used to install the oil inlet pipe (101) or the oil outlet pipe (102) of the fuel filter; It is characterized by including: The warning device casing (6) has a warning device inner cavity; Diaphragm (7), arranged in the inner cavity of the alarm, and divides the inner cavity of the alarm into a first cavity (61) and a second cavity (62), the first cavity (61) can be connected with the The lumen of the oil inlet pipe (101) or the lumen of the oil outlet pipe (102) is connected, and the diaphragm (7) can be deformed along the first direction; The indicator (8) is slidably arranged in the second cavity (62) along the first direction; The first elastic member (81) is used to provide elastic force to make the indicator (8) slide, so that the indicator (8) is always pressed against the diaphragm (7). 2. The pressure warning device according to claim 1, characterized in that, the warning device casing (6) comprises a warning device main body (63) and an identification structure (64) connected to the warning device main body (63), The diaphragm (7) is arranged on the alarm main body (63), the indicator (8) is slidably arranged on the identification structure (64), and the identification structure (64) is made of light-transmitting material. 3. The pressure warning device according to claim 2, characterized in that, the marking structure (64) is provided with scale markings. 4. The pressure alarm according to claim 2 or 3, further comprising: The push rod (9) is slidably arranged in the first chamber (61) along the first direction; The second elastic member (91) is used to provide an elastic force for sliding the push rod (9), so that the push rod (9) always abuts against the diaphragm (7). 5. The pressure alarm according to claim 4, characterized in that, the alarm main body (63) has a push rod chute (65) communicating with the first cavity (61), and the push rod ( 9) It includes a push rod slider (92) and a blocking piece (93) arranged on the push rod slider (92), and the push rod slider (92) can move relative to the push rod chute (65) Sliding along the first direction, the blocking piece (93) is slidably arranged in the first chamber (61) along the first direction, the push rod slider (92) and the side of the push rod chute (65) The side wall of the push rod chute (65) is provided with an interface (66), and the interface (66) communicates with the first cavity (61). 6. The pressure alarm according to claim 5, characterized in that, the push rod slider (92) can slide along the first direction to have a closed position and a conduction position, when the push rod slider (92) ) is in the closed position, the push rod slider (92) closes the interface (66), so that the lumen of the oil inlet pipe (101) is separated from the interface (66), or the oil outlet pipe (102) The lumen of the push rod slider (92) is separated from the interface (66); when the push rod slider (92) is in the conduction position, the push rod slider (92) opens the interface (66), and the oil inlet pipe ( 101) or the lumen of the oil outlet pipe (102) communicates with the interface (66). 7. The pressure warning device according to claim 5, characterized in that, the outer wall of the baffle (93) is attached to the cavity wall of the first cavity (61), and the baffle (93) is provided with A diversion hole (94), the first cavity (61) located at both ends of the baffle (93) communicates through the diversion hole (94). 8. The pressure warning device according to claim 2, characterized in that, the indicator (8) is provided with an abutment portion (82), and the abutment portion (82) can be connected to the identification structure (64) The end away from the alarm main body (63) abuts against. 9. A fuel filter, characterized in that it comprises a pressure alarm as claimed in any one of claims 1-8, and also includes an oil inlet pipe (101) and an oil outlet pipe (102), and the pressure alarm is arranged on the The oil inlet pipe (101) or the oil outlet pipe (102). 10. A vehicle, comprising a fuel filter as claimed in claim 9.

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