CN111561411A - Fuel filter with eccentric heating structure - Google Patents

Abstract

The invention discloses a fuel filter with an eccentric heating structure, which comprises an upper cover and a shell, wherein the upper cover is detachably connected with the shell and encloses a cavity, a filter element is arranged in the cavity, the filter element is provided with a central tube, an oil outlet is arranged downwards on the central tube of the filter element, and the oil outlet extends out of the cavity and is used for flowing out filtered fuel; an annular space is enclosed between the filter element and the side wall of the shell; an oil inlet is formed in the edge of the side wall of the shell and communicated with the annular space; the central line of the filter element is overlapped with the central line of the upper cover, the filter element and the shell are eccentrically arranged, the central line of the filter element and the central line of the shell are mutually parallel and arranged at intervals, one part of annular space of one end of the filter element, which is close to the inner wall of the shell, forms a gap reducing part, and the other part of annular space of the filter element, which is far away from the inner wall of the shell, forms a gap expanding part; a plurality of electric heaters are arranged in the gap enlarging part at intervals along the circumferential direction. The invention can not only effectively heat the fuel before passing through the filter layer, but also realize the technical goal of reducing the occupied space as much as possible.

Description

Fuel filter with eccentric heating structure

technical field

The invention relates to the technical field of motor vehicle fuel filtration, in particular to a fuel filter with heating function.

Background technique

The viscosity of motor vehicle fuel is reduced after heating, which can be better filtered and burned, so more and more fuel filters have built-in heaters to heat the fuel.

The fuel filter includes a casing and a top cover (it can also be said to be an upper casing and a lower casing), and a filter element is installed in the cavity enclosed by the casing and the top cover. The lower part of the shell is provided with a water collecting cup. If the fuel filter is installed at the water cup, it cannot effectively heat the fuel before passing through the filter layer, so that the resistance of the fuel passing through the filter layer will not be reduced. Although the electric heater in the patent 201721433468.5 can heat the fuel near the filter layer, the heaters are evenly distributed along the circumference of the filter layer (filter element), and the filter element and the shell are arranged coaxially, resulting in the shell where the heater is installed. The body diameter is larger and takes up a lot of space. At present, the space utilization in the motor vehicle is becoming more and more refined, and the redundant space in the motor vehicle is becoming less and less. Although the electric heater in the patent 201721433468.5 can heat the fuel near the filter layer (the fuel before the filter layer), it cannot The technical goal of minimizing space usage is achieved while heating the fuel near the filter layer.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a technology that can not only effectively heat the fuel before passing through the filter layer, but also achieve the technical goal of reducing space occupation as much as possible.

In order to achieve the above purpose, the fuel filter with eccentric heating structure of the present invention comprises an upper cover and a casing, the upper cover and the casing are detachably connected and form a cavity, a filter element is arranged in the cavity, and the filter element has a central pipe, The central tube of the filter element is provided with an oil outlet downward, and the oil outlet extends out of the cavity and is used for the outflow of the filtered fuel; an annular space is formed between the filter element and the side wall of the casing;

It is characterized in that: an oil inlet is arranged along the side wall of the casing, and the oil inlet is communicated with the annular space; the center line of the filter element and the center line of the upper cover overlap, the filter element and the shell are eccentrically arranged, and the center line of the filter element and the shell The centerlines of the filter elements are parallel to each other and are arranged at intervals. A part of the annular space at one end of the filter element close to the inner wall of the shell forms a gap reducing part, and another part of the annular space where the filter element is far from the inner wall of the shell forms a gap expanding part; heater.

The bottom of the upper cover and the top of the casing are detachably connected together by means of screw fit.

The oil inlet is arranged along the tangential direction of the side wall of the casing, so that the fuel flows in the circumferential direction after entering the annular space between the filter element and the casing.

The top end of the electric heater is connected with the casing through the connecting rod, and there is a gap between the electric heater, the outer wall of the filter element and the inner wall of the casing.

The electric heater is fitted on the inner wall of the casing and has a gap with the outer wall of the filter element.

The present invention has the following advantages:

The filter element and the casing are eccentrically arranged to form a gap narrowing part and a gap expanding part. In this way, without increasing the diameter of the casing, a space for installing an electric heater can be provided, which can effectively heat the fuel before passing through the filter layer. , and does not increase the space occupation, so that the fuel filter using the structure of the present invention can adapt to more vehicle models, which not only reduces the design cost of designing different fuel filters for different vehicle models, but also makes the same type of fuel filter. Increase its production numbers due to greater model adaptability, further reducing costs through larger-scale production. The oil inlet is arranged on the side wall of the casing and communicated with the annular space, which provides basic conditions for the fuel oil to flow along the annular space after entering the casing and be heated by the electric heater.

The oil inlet is arranged along the tangential direction of the side wall of the casing, which is convenient for the fuel to flow in the circumferential direction more quickly under the action of oil pressure after entering the annular space between the filter element and the casing, so that the fuel can be heated more evenly.

The electric heater is arranged in the radial middle of the annular space, so that the fuel oil flows from both sides thereof, the contact area between the fuel oil and the electric heater is increased, and the heating efficiency is improved.

Description of drawings

1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic diagram of the principle of eccentric arrangement of the filter element and the housing to form a gap expansion part and a gap reduction part.

Detailed ways

Example 1

As shown in FIG. 1 and FIG. 2 , the fuel filter with eccentric heating structure in this embodiment includes an upper cover 1 and a casing 2. The upper cover 1 and the casing 2 are detachably connected to form a cavity, and the cavity is A filter element 3 is provided, the filter element 3 has a central pipe 4, and the central pipe 4 of the filter element 3 is provided with an oil outlet 5 downward, and the oil outlet 5 extends out of the cavity and is used for the filtered fuel to flow out; the filter element 3 and the housing 2 An annular space is enclosed between the side walls (annular space is part of the cavity);

An oil inlet 6 is provided along the side wall of the casing 2, and the oil inlet 6 is communicated with the annular space; the center line of the filter element 3 overlaps with the center line of the upper cover 1, the filter element 3 and the shell 2 are eccentrically arranged and the center of the filter element 3 is eccentric. The line 7 and the center line 8 of the shell 2 are parallel to each other and are arranged at intervals (3-10 mm apart, including both ends), one end of the filter element 3 is close to a part of the annular space of the inner wall of the shell 2 to form a gap reduction portion 9, and the filter element 3 is far away from the shell. Another part of the annular space on the inner wall of the body 2 forms a gap enlargement part 10; a plurality of electric heaters 11 are installed in the gap enlargement part 10 at intervals along the circumferential direction.

The filter element 3 and the housing 2 are eccentrically arranged, so that the gap reducing part 9 and the gap expanding part 10 can be formed. In this way, on the premise of not increasing the diameter of the housing 2, the space for installing the electric heater 11 can be provided, which can not only heat effectively The fuel before the filter layer can pass through the fuel without increasing the space occupation, so that the fuel filter using the structure of the present invention can adapt to more vehicle models, which not only reduces the design cost of designing different fuel filters for different vehicle models, but also makes the same Models of fuel filters increase their production numbers due to greater model adaptability, further reducing costs through larger-scale production. The oil inlet 6 is arranged on the side wall of the casing 2 and communicated with the annular space, which provides basic conditions for the fuel oil to flow along the annular space after entering the casing 2 and be heated by the electric heater 11 .

As shown in FIG. 2 , the dotted circle in FIG. 2 shows the position when the filter element and the housing 2 are arranged on the same center line. The dotted circle set concentrically and the solid line circle set eccentrically intersect the two points A, B, and the annular space to the left of the connecting line between the two points AB, the solid line circle represents the gap between the eccentrically set filter element and the inner wall of the shell Compared with the dotted circle, it becomes smaller to form the gap reducing part 9; in the annular space to the right of the connecting line between the two points AB, the gap between the eccentrically arranged filter element and the inner wall of the housing represented by the solid line circle is smaller than that of the dotted circle. large to form the gap expansion portion 10 .

The bottom of the upper cover 1 and the top of the casing 2 are detachably connected together by means of screw fit.

The oil inlet 6 is arranged along the tangential direction of the side wall of the casing 2 , so that the fuel flows in the circumferential direction after entering the annular space between the filter element 3 and the casing 2 .

The oil inlet 6 is arranged along the tangential direction of the side wall of the casing 2, so that the fuel can flow more quickly in the circumferential direction under the action of oil pressure after entering the annular space between the filter element 3 and the casing 2, so that the fuel can be more evenly distributed. heating.

The top and bottom ends of the electric heater 11 are respectively connected with the casing 2 through connecting rods, and there are gaps between the electric heater 11 and the outer wall of the filter element 3 and the inner wall of the casing 2 .

The electric heater 11 is arranged in the radial middle part of the annular space, so that the fuel oil flows from both sides thereof, and the contact area between the fuel oil and the electric heater 11 is increased, thereby improving the heating efficiency.

When in use, the fuel enters the annular space tangentially through the oil inlet 6, so as to flow rapidly in the annular space. The fuel is heated as it flows through the electric heater 11 . The viscosity of the heated fuel decreases. Under the action of pressure, the fuel in the annular space gradually enters the central pipe 4 of the filter element 3 through the filter layer inward, and is filtered when passing through the filter layer. The filtered fuel flows out through the oil outlet 5.

Embodiment 2

The difference between this embodiment and the first embodiment is that the electric heater 11 is fitted and installed on the inner wall of the casing 2 and has a gap with the outer wall of the filter element 3 . This embodiment is a feasible solution, and the heating efficiency is lower than that of the first embodiment.

The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced without departing from the Any modification or partial replacement of the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims (5)

1. The fuel filter with the eccentric heating structure comprises an upper cover and a shell, wherein the upper cover is detachably connected with the shell and encloses a cavity, a filter element is arranged in the cavity, the filter element is provided with a central tube, an oil outlet is arranged downwards on the central tube of the filter element, and the oil outlet extends out of the cavity and is used for flowing out of filtered fuel; an annular space is enclosed between the filter element and the side wall of the shell;

the method is characterized in that: an oil inlet is formed in the edge of the side wall of the shell and communicated with the annular space; the central line of the filter element is overlapped with the central line of the upper cover, the filter element and the shell are eccentrically arranged, the central line of the filter element and the central line of the shell are mutually parallel and arranged at intervals, one part of annular space of one end of the filter element, which is close to the inner wall of the shell, forms a gap reducing part, and the other part of annular space of the filter element, which is far away from the inner wall of the shell, forms a gap expanding part; a plurality of electric heaters are arranged in the gap enlarging part at intervals along the circumferential direction.

2. The fuel filter with eccentric heating structure of claim 2, wherein: the bottom of the upper cover is detachably connected with the top of the shell in a thread matching mode.

3. The fuel filter with an eccentric heating structure according to claim 1 or 2, characterized in that: the oil inlet is arranged along the tangential direction of the side wall of the shell, so that fuel oil flows along the circumferential direction after entering an annular space between the filter element and the shell.

4. The fuel filter with an eccentric heating structure according to claim 1 or 2, characterized in that: the top end of the electric heater is connected with the shell through the connecting rod, and gaps are formed among the electric heater, the outer wall of the filter element and the inner wall of the shell.

5. The fuel filter with an eccentric heating structure according to claim 1 or 2, characterized in that: the electric heater is attached to the inner wall of the shell and has a gap with the outer wall of the filter element.

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