CN114320692B

CN114320692B - Fuel filter

Info

Publication number: CN114320692B
Application number: CN202210161641.XA
Authority: CN
Inventors: 孔令法; 姜军; 吴一男; 张龙飞; 李海忠; 崔晓柱; 张庆辉; 杨中凯; 车世广; 吴高峰; 腾鹏坤
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-12-02
Anticipated expiration: 2042-02-22
Also published as: CN114320692A

Abstract

The invention belongs to the technical field of automobile fuel supply systems, and discloses a fuel filter, which comprises: a filter body; the water containing cup is connected to the bottom of the filter body, and a water collecting cavity is formed in the water containing cup; the water inlet section and the water outlet section of the heat exchanger are respectively arranged on the water containing cup in a penetrating mode and communicated with the outside, and the main body of the heat exchanger between the water inlet section and the water outlet section of the heat exchanger is arranged between the filter body and the water containing cup in a reciprocating type disc folding mode and a disc folding mode close to a whole circle. The filter body filters impurities and water in fuel oil, the impurities with large mass and water sink into the water drain cup, and high-temperature cooling liquid of an engine flows through the heat exchanger, so that the fuel oil in the filter body and the fuel oil and water in the water drain cup are heated, the device avoids using an electric heating device to heat unfreezing water and heat No. 0 diesel oil in winter, the electric energy of a storage battery is saved, and the power consumption shortage of an automobile is relieved.

Description

Fuel filter

Technical Field

The invention relates to the technical field of automobile fuel supply systems, in particular to a fuel filter.

Background

In the working process of the engine, the fuel filter is connected in series in the fuel supply pipeline to filter impurities and water contained in fuel, so that precision devices such as a fuel injector in a fuel system are prevented from being blocked, mechanical abrasion is reduced, stable operation of the engine is ensured, and reliability is improved.

In winter, liquid in a water discharge cup of the fuel oil filter freezes, so that water cannot be discharged, and the electric heating device is heated and unfrozen in a market according to a coping scheme, so that electric energy needs to be continuously consumed, and under the increasing development trend of vehicle electric appliances, the problems of power shortage of a storage battery in winter and power shortage of the storage battery can occur.

The heating scheme of the filter in the cold district version motorcycle type that can use No. 0 diesel oil operation vehicle winter in the existing market is the electrical heating scheme, overlaps electrical heater in filter metal casing periphery, and this kind of heating scheme needs the electric energy of consuming, and electrical heater separates with inside fuel has the metal casing, and heating effect is poor, heat loss is many, power consumptive height.

Disclosure of Invention

The invention aims to provide a fuel filter to solve the problem that the electric shortage of an automobile is easy to occur when the filter is heated by adopting an electric heating scheme.

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

a fuel filter comprising:

the filter body is provided with a ring-shaped filter element;

the water containing cup is connected to the bottom of the filter body, and a water collecting cavity is formed in the water containing cup; and

a water inlet section and a water outlet section of the heat exchanger respectively penetrate through the water containing cup and are communicated with the outside,

be equipped with the heat exchanger main part between the section of intaking and the play water section, the heat exchanger main part includes:

the heat exchanger outer ring main body is alternately switched between the outer side of the filter element and the water containing cup along the vertical direction; and

the heat exchanger inner ring main body is annularly arranged in the central area of the water drain cup and is positioned on the inner side of the heat exchanger outer ring main body, and the heat exchanger inner ring main body is communicated with the heat exchanger outer ring main body.

The filter body filters impurities and water in fuel oil, the impurities with large mass and water sink into the water discharge cup, the outer ring main body of the heat exchanger of the main body of the heat exchanger is alternately switched between the outer side of the filter element and the water discharge cup along the vertical direction, the inner ring main body of the heat exchanger is annularly arranged in the central area of the water discharge cup and is positioned on the inner side of the outer ring main body of the heat exchanger, and high-temperature cooling liquid of an engine flows through the heat exchanger, so that the fuel oil in the filter body and the fuel oil and water in the water discharge cup are heated.

As a preferable scheme of the fuel filter, one of the water inlet section and the water outlet section is communicated with the heat exchanger outer ring main body, and the other of the water inlet section and the water outlet section is communicated with the heat exchanger inner ring main body.

The arrangement can enable the cooling liquid in the heat exchanger to heat the periphery of the water discharge cup and the filter element and the inside of the water discharge cup in sequence, and the heat exchange effect is improved.

As the preferable scheme of the fuel filter, the water inlet section and the water outlet section are separated by a preset angle.

The angle is predetermine with play water section interval to the section of intaking, can realize more reasonable arranging, avoids the repetition to arrange.

As the preferable scheme of the fuel filter, a filter element platform for placing a filter element is arranged in a water collecting cavity of the water containing cup, the filter element platform is arranged between the heat exchanger outer ring main body and the heat exchanger inner ring main body in a limiting mode, and is provided with a notch corresponding to two ends of the heat exchanger inner ring main body.

The filter element platform is used for placing filter elements, the heat exchanger outer ring main body and the heat exchanger inner ring main body can be limited, the filter element platform is provided with a notch, and the notch is used for the connection section and the water outlet section to yield, so that more reasonable arrangement is realized.

As a preferable scheme of the fuel filter, the outer peripheral surface of the heat exchanger main body is fixedly connected with a connecting plate, the top of the connecting plate is elastically connected with the filter body along the vertical direction, and the bottom of the connecting plate is fixedly connected with the filter body;

the heat exchanger is elastically connected with the water discharging cup along the vertical direction.

The heat exchanger main part and connecting plate fixed connection, elastic connection between the top of connecting plate and the filter body to have the shock attenuation, inhale the effect of shake, damage the heat exchanger main part with preventing that the rigidity collides, along vertical direction elastic connection between heat exchanger and the cup that drains, further improve the shock attenuation, inhale the effect of shaking.

As a preferable scheme of the fuel filter, a first lip edge is arranged at the top of the connecting plate, and a second lip edge is arranged at the bottom of the connecting plate;

the filter body comprises an upper filter body and a lower filter body which are connected from top to bottom, the lower filter body is cylindrical and is used for accommodating the connecting plate, an elastic piece is arranged between the first lip edge and the upper filter body, the bottom of the lower filter body extends outwards to form a third lip edge, and the second lip edge is connected with the third lip edge through a bolt;

the water containing cup is connected with the third lip edge through a bolt.

An elastic piece is arranged between the first lip edge of the connecting plate and the filter upper body to realize elastic connection, a third lip edge is arranged at the bottom of the filter lower body, and the third lip edge is connected with a second lip edge at the bottom of the connecting plate to realize fixation of the connecting plate and the heat exchanger.

Preferably, the first lip edge is provided with a first oil passing hole on an inner side thereof, and the connecting plate is provided with a plurality of rows of second oil passing holes along a circumferential direction thereof.

The first oil passing hole and the second oil passing hole are used for fuel oil circulation of the body under the filter, and due to oil passing requirements, the first lip edge needs the large first oil passing hole, and the second oil passing holes are provided with multiple rows, so that oil can uniformly permeate and circulate, and the oil cavity is prevented from being partitioned.

As the preferable scheme of the fuel filter, the bottoms of the heat exchanger main body, the water inlet section and the water outlet section are provided with damping blocks.

The bottom of heat exchanger main part, the section of intaking and play water section all sets up the snubber block to a plurality of positions in the bottom of heat exchanger provide the shock attenuation.

The invention has the beneficial effects that: the filter body filters impurities and water in fuel oil, the impurities with large mass and water sink into the water discharge cup, the outer ring main body of the heat exchanger of the main body of the heat exchanger is alternately switched between the outer side of the filter element and the water discharge cup along the vertical direction, the inner ring main body of the heat exchanger is annularly arranged in the central area of the water discharge cup and is positioned on the inner side of the outer ring main body of the heat exchanger, and high-temperature cooling liquid of an engine flows through the heat exchanger, so that the fuel oil in the filter body and the fuel oil and water in the water discharge cup are heated.

Drawings

FIG. 1 is a schematic structural diagram of a fuel filter provided in a first embodiment and a second embodiment of the present application;

FIG. 2 is a fuel filter path diagram of the fuel filter of FIG. 1;

FIG. 3 is a schematic illustration of a first perspective view of a heat exchanger in the fuel filter of FIG. 1;

FIG. 4 is a schematic diagram of a second perspective of the heat exchanger of the fuel filter of FIG. 1;

FIG. 5 is an expanded view of the heat exchanger shown in FIG. 4;

FIG. 6 is a schematic view of the structure of a water containing cup in the fuel filter shown in FIG. 1;

FIG. 7 is a schematic view of the fuel filter showing the heat exchanger and the connection plate engaged;

FIG. 8 is an enlarged view of a portion of FIG. 1 at A;

FIG. 9 is an enlarged view of a portion of FIG. 1 at B;

fig. 10 is a partially enlarged schematic view of the point C shown in fig. 1.

In the figure:

1-a filter body; 10-a filter element; 11-the filter upper body; 12-a lower filter body; 121-a third lip;

2, placing a water cup; 21-a cartridge station; 211-notch; 212-peripheral ring cavity; 213-inner circular cavity;

3-a heat exchanger; 3A-water inlet section; 3B-a water outlet section; 30-a heat exchanger body; 301-heat exchanger outer ring body; 302-a heat exchanger inner ring body; 303-a connecting segment; 30A-escape region;

4-connecting plates; 41-a first lip; 42-a second lip; 40A-a first oil passing hole; 40B-a second oil passing hole;

50-an elastic member; 51-a first snubber block; 52-second snubber block.

Detailed Description

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

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

The first embodiment is as follows:

the embodiment provides a fuel filter, as shown in fig. 1 and 2, the fuel filter comprises a filter body 1, a water discharging cup 2 and a heat exchanger 3.

The filter body 1 can filter out impurities and water in fuel oil, the fuel oil flow path is as shown by an arrow in fig. 2, the fuel oil is filtered layer by layer from outside to inside through the annular filter element 10, finally, filtered clean fuel oil flows out from the oil outlet channel on the central shaft of the filter body 1, water and large-mass impurities filtered by the filter element 10 sink into the water collecting cavity of the water containing cup 2, the heat exchanger 3 extends into the filter body 1 from the water containing cup 2, and high-temperature cooling liquid of an engine circulates in the heat exchanger 3.

As shown in fig. 1-5, the heat exchanger 3 includes a water inlet section 3A, a water outlet section 3B and a heat exchanger main body 30, the water inlet section 3A and the water outlet section 3B are respectively disposed through the water cup 2 and communicated with the outside, and the heat exchanger main body 30 is communicated between the water inlet section 3A and the water outlet section 3B.

The heat exchanger main body 30 is arranged between the filter body 1 and the water drain cup 2 in a reciprocating type disk folding manner and a nearly full-circle type disk folding manner, and heats the fuel in the filter body 1 and the oil and water in the water drain cup 2, thereby replacing an electric heating device.

In this embodiment, the filter body 1 includes a filter upper body 11 and a filter lower body 12 connected from top to bottom, the filter upper body 11 is provided with an oil inlet and an oil inlet channel, fuel enters the filter lower body 12 through the oil inlet and the oil inlet channel, a filter element 10 is arranged in the filter lower body 12, the filter element 10 is in an annular cylinder shape, in this embodiment, the filter element 10 is composed of a plurality of layers of filter paper and metal bone pieces, the fuel gradually permeates to the inner side of the filter element 10 from the outer side of the filter element 10, and then enters the oil outlet of the filter upper body 11 from the inner side of the filter element 10 to be discharged.

Further, a part of the heat exchanger main body 30 is alternately and reciprocally and spirally arranged in the filter body 1 and the water discharge cup 2 along the height direction. One part of the heat exchanger main body 30 extends along the height direction and is arranged between the filter body 1 and the water drain cup 2 in a reciprocating and winding alternating switching manner, so that the flowing directions of cooling liquid between one part of the adjacent two sections of the heat exchanger main bodies 30 are opposite, and oil liquid in the filter body 1 and the water drain cup 2 is uniformly heated; the other part of the heat exchanger main body 30 is arranged in the central area of the inner part of the water discharging cup 2 close to a full circle type disc, so that the cooling liquid heats the fuel oil and the water in the central area of the inner part of the water discharging cup 2.

Specifically, the heat exchanger body 30 includes a heat exchanger outer ring body 301 and a heat exchanger inner ring body 302.

The outer ring main body 301 of the heat exchanger is alternately switched between the outer side of the filter element 10 and the water discharging cup 2 along the vertical direction; the heat exchanger inner ring main body 302 is annularly arranged in the central area of the water containing cup 2 and is approximately arranged in a full circle type disk folding mode, and the heat exchanger inner ring main body 302 is located on the inner side of the heat exchanger outer ring main body 301 and is communicated with the heat exchanger outer ring main body 301.

The heat exchanger outer ring main body 301 heats oil on the periphery of the filter element 10 and the periphery of the water discharge cup 2, and the heat exchanger inner ring main body 302 heats fuel oil and water in the central area of the water discharge cup 2 below the filter element 10.

Further, one of the water inlet section 3A and the water outlet section 3B is communicated with the heat exchanger outer ring main body 301, and the other of the water inlet section 3A and the water outlet section 3B is communicated with the heat exchanger inner ring main body 302. In the control of this embodiment, the water inlet section 3A is connected to the heat exchanger outer ring main body 301, and the water outlet section 3B is communicated with the heat exchanger inner ring main body 302, and it can be understood that the coolant enters the heat exchanger outer ring main body 301 from the water inlet section 3A, then enters the heat exchanger inner ring main body 302, and then passes through the water outlet section 3B from the heat exchanger inner ring main body 302 to discharge water.

In this embodiment, the water inlet section 3A and the water outlet section 3B are separated by 90 °, and the inner ring body 302 of the heat exchanger is provided with a 270 ° arc-shaped tube structure.

Further, as shown in fig. 5, the heat exchanger body 30 has one section with a height less than the height of the remaining sections and is capable of forming a relief area 30A, it being understood that the heat exchanger inner ring body 302 extends through the relief area 30A to the water outlet section 3B.

Alternatively, the height of the relief area 30A is defined to be 3-5 times the diameter of the tube of the heat exchanger 3, thereby providing sufficient space for the heat exchanger inner ring body 302 to connect to the water outlet section 3B.

As shown in fig. 6, a filter element table 21 for placing the filter element 10 is arranged in the water collection cavity of the water containing cup 2, the filter element table 21 is arranged between the heat exchanger outer ring main body 301 and the heat exchanger inner ring main body 302 in a limited manner, the filter element table 21 is provided with notches 211, in this embodiment, the notches 211 correspond to two ends of the heat exchanger inner ring main body 302, one of the notches 211 is used for yielding for a connecting section 303 connecting the heat exchanger outer ring main body 301 and the heat exchanger inner ring main body 302, and the other notch is used for yielding for a water outlet section 3B.

Specifically, filter core platform 21 includes big radian section and minor arc section, and in this embodiment, big radian section has 270 radians, and the minor arc section has 45 radians, and the interval forms breach 211 between big radian section and the minor arc section. The connecting section 303 of the heat exchanger body 30 is arranged in one of the notches 211, and the water outlet section 3B of the heat exchanger 3 is arranged in the other notch 211.

Further, in the water discharge cup 2, the lower side part of the heat exchanger outer ring main body 301 is arranged in the outer peripheral ring cavity 212 of the filter element platform 21 in a reciprocating and folding alternating switching mode, and the whole of the heat exchanger inner ring main body 302 is arranged in the inner circular cavity 213 of the filter element platform 21.

It will be appreciated that the cartridge station 21 not only serves to support the cartridge 10, but also to limit relative movement with the heat exchanger body 30. When the fuel filter is assembled, the filter element 10 can be placed firstly, then the heat exchanger 3 is installed, the heat exchanger 3 is sleeved outside the filter element 10, and then the water placing cup 2 and the filter body 1 are connected in the axial direction. The filter element disassembling process is opposite to the assembling process; further, the filter element 10 may be detached from the first oil passing hole 40A from above by detaching a bolt between the filter upper body 11 and the filter lower body 12.

In the fuel filter provided by the embodiment, the heat exchanger main body 30 is arranged between the filter body 1 and the water discharge cup 2 in a reciprocating type disk folding manner and a nearly full circle type disk folding manner, and heats fuel in the filter body 1 and oil and water in the water discharge cup 2, thereby replacing an electric heating device.

The second embodiment:

The filter body 1 can filter out impurities and water in fuel oil, the flow path of the fuel oil is shown by arrows in fig. 2, the fuel oil is filtered layer by layer from outside to inside through the annular filter element 10, finally, the filtered clean fuel oil flows out from the oil outlet channel on the central axis of the filter body 1, water and large-mass impurities filtered by the filter element 10 sink into the water collecting cavity of the water discharging cup 2, the heat exchanger 3 extends into the filter body 1 from the water discharging cup 2, and high-temperature engine coolant circulates in the heat exchanger 3.

As shown in fig. 1-5, the heat exchanger 3 includes a water inlet section 3A, a water outlet section 3B and a heat exchanger main body 30, the water inlet section 3A and the water outlet section 3B are respectively penetrated through the water discharge cup 2 and are communicated with the outside, the heat exchanger main body 30 is communicated between the water inlet section 3A and the water outlet section 3B, the heat exchanger main body 30 is arranged between the filter body 1 and the water discharge cup 2 in a reciprocating type disk folding manner and a nearly full circle type disk folding manner, and heats up the fuel in the filter body 1 and the oil and water in the water discharge cup 2, thereby replacing an electric heating device.

In this embodiment, the filter body 1 includes a filter upper body 11 and a filter lower body 12 connected from top to bottom, the filter upper body 11 is provided with an oil inlet and an oil inlet channel, fuel enters the filter lower body 12 through the oil inlet and the oil inlet channel, a filter element 10 is arranged in the filter lower body 12, the filter element 10 is in an annular cylinder shape, in this embodiment, the filter element 10 is composed of a plurality of layers of filter paper and metal bone pieces, the fuel gradually permeates to the inner side of the filter element 10 from the outer side of the filter element 10, and then the fuel enters the oil outlet channel of the filter upper body 11 from the inner side of the filter element 10 to be discharged.

Further, the heat exchanger main body 30 includes a heat exchanger outer ring main body 301 and a heat exchanger inner ring main body 302.

The outer ring main body 301 of the heat exchanger is alternately switched between the outer side of the filter element 10 and the water discharging cup 2 along the vertical direction; the heat exchanger inner ring main body 302 is annularly arranged in the water containing cup 2, the central area of the heat exchanger inner ring main body is close to the whole circle type disc-folding arrangement, the heat exchanger inner ring main body 302 is located on the inner side of the heat exchanger outer ring main body 301, and the heat exchanger inner ring main body 302 is communicated with the heat exchanger outer ring main body 301.

The heat exchanger outer ring main body 301 heats oil on the periphery of the filter element 10 and the periphery of the water discharge cup 2, and the heat exchanger inner ring main body 302 heats fuel and water in the central area of the water discharge cup 2 on the lower side of the filter element 10. Further, one of the water inlet section 3A and the water outlet section 3B is communicated with the heat exchanger outer ring main body 301, and the other of the water inlet section 3A and the water outlet section 3B is communicated with the heat exchanger inner ring main body 302. In the control of this embodiment, the water inlet section 3A is connected to the heat exchanger outer ring main body 301, and the water outlet section 3B is communicated with the heat exchanger inner ring main body 302, and it can be understood that the coolant enters the heat exchanger outer ring main body 301 from the water inlet section 3A, then enters the heat exchanger inner ring main body 302, and then passes through the water outlet section 3B from the heat exchanger inner ring main body 302 to discharge water.

Further, in the water discharging cup 2, the lower side part of the heat exchanger outer ring main body 301 is arranged in the outer peripheral ring cavity 212 of the filter element platform 21 in a reciprocating and disc-folding alternating switching mode, and the whole of the heat exchanger inner ring main body 302 is arranged in the inner round cavity 213 of the filter element platform 21.

It will be appreciated that the cartridge station 21 not only serves to support the cartridge 10, but also to limit relative movement with the heat exchanger body 30. When the fuel filter is assembled, the filter element 10 can be placed firstly, then the heat exchanger 3 is installed, the heat exchanger 3 is sleeved outside the filter element 10, and then the water placing cup 2 and the filter body 1 are connected in the axial direction. The filter element disassembling process is opposite to the assembling process; further, the filter element 10 may be detached from the first oil passing hole 40A from above by disassembling a bolt between the upper filter body 11 and the lower filter body 12.

Further, the fuel filter also comprises a buffer component for providing buffer support in the height direction for the heat exchanger 3.

Specifically, as shown in fig. 7, the outer peripheral surface of the heat exchanger main body 30 is fixedly connected with a connecting plate 4, the connecting plate 4 is in a surrounding structure, the top of the connecting plate 4 is elastically connected with the lower end of the filter upper body 11 along the vertical direction, and the bottom of the connecting plate 4 is fixedly connected with the lower end of the filter lower body 12. It will be appreciated that the height of the connection plate 4 is less than the height of the heat exchanger body 30. In other words, the plane of the lower end of the connecting plate 4 is connected to the plane of the lower end of the filter lower body 12.

The heat exchanger 3 is fixed at the lower end of the lower filter body 12 through the connecting plate 4, and the upper end of the connecting plate 4 can bear certain pressure.

The heat exchanger 3 is elastically connected with the water discharging cup 2 along the vertical direction. It will be appreciated that the heat exchanger 3 and the connection plate 4 co-operate to provide cushioning in both the up and down directions.

Further, a first lip 41 is provided at the top of the connecting plate 4, and a second lip 42 is provided at the bottom of the connecting plate 4. In this embodiment, the widths of the first lip 41 and the second lip 42 are set to be 15mm, and the first lip 41 extends radially inward and the second lip 42 extends radially outward, which are opposite to each other.

As shown in fig. 8, an elastic member 50 is provided between the first lip 41 and the filter upper body 11. Alternatively, the elastic member 50 is provided as an oil-resistant rubber member.

The bottom of the filter lower body 12 extends outwards to form a third lip 121 (as shown in fig. 1), the second lip 42 is connected with the third lip 121 through a bolt, and the water containing cup 2 is connected with the third lip 121 through a bolt.

Further, a first oil passing hole 40A is provided inside the first lip 41. In this embodiment, the diameter of the first oil passing hole 40A is much larger than the width of the first lip 41.

The connecting plate 4 is provided with a plurality of rows of second oil passing holes 40B along the circumferential direction thereof. It can be understood that the fuel oil firstly passes through the first oil passing hole 40A, then can contact the heat exchanger outer ring main body 301 for heat exchange, and then passes through the filter element 10 for filtering.

In the present embodiment, the second oil passing holes 40B are circular holes, but are not limited to circular holes, and may be holes having other shapes such as triangular holes and quadrangular holes.

Specifically, as shown in fig. 9, a first damper block 51 is disposed at the bottom of the water collecting cavity of the water discharging cup 2, and the first damper block 51 supports the heat exchanger inner ring main body 302. As shown in fig. 10, a second damper block 52 is further disposed in the discharge cup 2, and the second damper block 52 supports the water inlet section 3A. The end of the water outlet section 3B having the same structure as that shown in fig. 10 is also provided with a second damping block 52 for supporting the water outlet section 3B, and the structural form is completely the same as that of the water inlet section 3A (shown in fig. 10), so that the description is not repeated.

In the fuel filter provided by the embodiment, the heat exchanger main body 30 is arranged between the filter body 1 and the water drain cup 2 in a reciprocating type disk folding manner and a manner close to a full circle type disk folding manner, and heats fuel in the filter body 1 and fuel and water in the water drain cup 2, so that an electric heating device is replaced, and in addition, the fuel filter is also provided with the heat exchanger 3 which is arranged along the buffer supports and the shock absorption at two ends of the height direction.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A fuel filter, comprising:

a filter body (1) provided with a cylindrical filter element (10);

the water containing cup (2) is connected to the bottom of the filter body (1), and a water collecting cavity is formed inside the water containing cup (2); and

heat exchanger (3), water inlet section (3A) and play water section (3B) of heat exchanger (3) wear to establish respectively put drinking cup (2) and communicate with the outside, it is equipped with heat exchanger main part (30) to intake between section (3A) and play water section (3B), heat exchanger main part (30) include:

the heat exchanger outer ring main body (301) is alternately switched between the outer side of the filter element (10) and the water containing cup (2) along the vertical direction; and

the heat exchanger inner ring main body (302) is annularly arranged in the central area of the water containing cup (2) and is positioned on the inner side of the heat exchanger outer ring main body (301), and the heat exchanger inner ring main body (302) is communicated with the heat exchanger outer ring main body (301);

the outer peripheral surface of the heat exchanger main body (30) is fixedly connected with a connecting plate (4), the top of the connecting plate (4) is elastically connected with the filter body (1) along the vertical direction, and the bottom of the connecting plate (4) is fixedly connected with the filter body (1);

the heat exchanger (3) is elastically connected with the water containing cup (2) along the vertical direction;

the top of the connecting plate (4) is provided with a first lip edge (41), and the bottom of the connecting plate (4) is provided with a second lip edge (42);

the filter body (1) comprises an upper filter body (11) and a lower filter body (12) which are connected from top to bottom, the lower filter body (12) is cylindrical and is used for accommodating the connecting plate (4), an elastic piece is arranged between the first lip (41) and the upper filter body (11), the bottom of the lower filter body (12) extends outwards to form a third lip (121), and the second lip (42) is connected with the third lip (121) through a bolt;

the water containing cup (2) is connected with the third lip edge (121) through a bolt.

2. The fuel filter according to claim 1, characterized in that one of the water inlet section (3A) and the water outlet section (3B) communicates with the heat exchanger outer ring body (301) and the other of the water inlet section (3A) and the water outlet section (3B) communicates with the heat exchanger inner ring body (302).

3. The fuel filter according to claim 2, wherein the water inlet section (3A) is spaced from the water outlet section (3B) by a predetermined angle.

4. The fuel filter according to claim 3, wherein a filter element table (21) for placing a filter element (10) is arranged in the water collecting cavity of the water discharging cup (2), the filter element table (21) is arranged between the heat exchanger outer ring main body (301) and the heat exchanger inner ring main body (302) in a limiting manner, the filter element table (21) is provided with a notch (211), and the notch (211) corresponds to two ends of the heat exchanger inner ring main body (302).

5. A fuel filter according to claim 1 wherein the first lip (41) is provided on the inside with first oil passing holes (40A) and the web (4) is provided with a plurality of rows of second oil passing holes (40B) along its circumference.

6. The fuel filter according to claim 1, characterized in that the heat exchanger body (30), the water inlet section (3A) and the water outlet section (3B) are provided with damping blocks at their bottom.