Plug-in type annular heater for fuel filter and fuel filter

Abstract

The utility model relates to a fuel oil filter and a plug-in type annular heater for the fuel oil filter, the fuel oil filter comprises a fuel oil filter element, a fuel oil filter shell and an annular heater, the annular heater is arranged around the fuel oil filter element, and the annular heater is connected with the fuel oil filter shell. The annular heater comprises a supporting structure, a heating sheet, a temperature control switch, a sealing ring, a mounting flange and a heater main body; and the mounting flange is used for mounting the annular heater on the fuel filter shell. Compared with the prior art, the annular heater can be installed on the fuel oil filter shell in an inserted mode, installation is convenient, the heating piece is arranged on the annular heater and is close to the surface of the fuel oil filter element, heating efficiency is high, and the annular heater is provided with the supporting structure so that stable installation of the annular heater can be guaranteed. And impact disturbance caused by fuel oil flowing is reduced.

Description

Technical Field

[0001] This utility model relates to the field of product installation technology, and in particular to an insert-type annular heater for a fuel filter and a fuel filter. Background Technology

[0002] In cold environments, when a vehicle does not use fuel with a low-temperature grade, after a long period of parking and waiting, the fuel coarse filter or fuel fine filter in the fuel supply system will often be blocked by wax that precipitates from the fuel at low temperatures, preventing fuel from passing through and thus preventing the vehicle from starting.

[0003] For vehicles in this situation, a cold-weather pack is often added to the fuel supply system. For the fuel pre-filter / fine filter, a heater is needed to melt the wax deposited on the filter element. Common heating methods include bottom heating, surround heating, and fuel inlet heating, but these methods suffer from complex structures, difficult installation, and poor heating performance.

[0004] Therefore, there is an urgent need for a heater that is simple in structure, easy to install, and has a good heating effect. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the prior art by proposing an insertable annular heater for fuel filters and a fuel filter. The annular heater can be installed on the fuel filter housing by insertion, which is convenient. The heating element is arranged on the annular heater and close to the surface of the fuel filter element, which has high heating efficiency. The annular heater has a support structure to ensure the stability of the annular heater installation and reduce the impact disturbance caused by fuel flow.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] The first objective of this invention is to provide an insertable annular heater for a fuel filter. The insertable annular heater is an annular heater used in a fuel filter, which includes a fuel filter element, a fuel filter housing, and an annular heater. The annular heater surrounds the fuel filter element and is connected to the fuel filter housing. The annular heater includes a support structure, heating elements, a temperature control switch, a sealing ring, a mounting flange, and a heater body. The heater body is connected to the support structure. The support structure is connected to the mounting flange, which is used to mount the annular heater onto the fuel filter housing. A sealing ring is installed on the mounting flange to ensure a seal when the annular heater is connected to the fuel filter housing. The heating elements are arranged on the heater body. The temperature control switch is connected to the mounting flange.

[0008] Furthermore, multiple heating elements are evenly arranged on the heater body.

[0009] Furthermore, the heater body is an annular heater body.

[0010] The temperature control switch is used to control the opening and closing of the annular heater based on the monitored air temperature; the temperature control switch is positioned facing the fuel filter side.

[0011] Furthermore, the heater body includes an inner metal sheet and an outer metal sheet; the inner metal sheet is connected to the outer metal sheet; the inner metal sheet is located inside the outer metal sheet; and the heating element is connected to the outer metal sheet.

[0012] Furthermore, the mounting flange is provided with bolt through holes to install and fix the annular heater to the fuel filter housing by bolts; the mounting flange is provided with a sealing ring groove, and the sealing ring is located in the sealing ring groove; the bolt through holes are located on the outside of the sealing ring groove.

[0013] The first objective of this invention is to provide a fuel filter including an insertable annular heater, the fuel filter further including a fuel filter element and a fuel filter housing; the annular heater is arranged around the fuel filter element and is connected to the fuel filter housing.

[0014] Furthermore, the fuel filter housing is provided with a support step; the support structure is connected to the support step.

[0015] Furthermore, the support structure includes a support block and a support frame, the support block being connected to the support frame; the support block is located on the side away from the mounting flange; the heater body is connected to the support frame; and the support frame is connected to the mounting surface of the mounting flange.

[0016] Furthermore, the annular heater has a sealed U-shaped structure.

[0017] Furthermore, the fuel filter housing includes an inlet and an outlet; the inlet is located on the side of the fuel filter housing; and the outlet is located on the bottom surface of the fuel filter housing.

[0018] Furthermore, the fuel filter element includes a central tube; the central tube is connected to the fuel outlet.

[0019] Furthermore, the annular heater is arranged around the lower half of the fuel filter element.

[0020] Furthermore, the fuel filter is a coarse fuel filter or a fine fuel filter.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) The present invention provides an insertable annular heater system for fuel filters. The annular heater can be installed onto the fuel filter housing by insertion, which is convenient. After the annular heater is installed onto the fuel filter housing, the fuel filter element can be installed.

[0023] 2) The present invention provides an insertable annular heater system for fuel filters, wherein the annular heater is arranged around the fuel filter element, and the heating elements are evenly arranged on the annular heater and close to the surface of the fuel filter element, resulting in high heating efficiency.

[0024] 3) The present invention provides an insertable annular heater system for fuel filters, wherein the annular heater is located in the lower half of the fuel filter element, which facilitates heat diffusion and exchange.

[0025] 4) The insertable annular heater system for fuel filters of this utility model has a support structure on the annular heater that cooperates with the support steps on the housing to ensure stable installation of the annular heater and reduce the impact disturbance caused by fuel flow. Attached Figure Description

[0026] Figure 1 This is a cross-sectional structural diagram of a fuel filter including an insert-type annular heater in an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of an insertable annular heater used in a fuel filter in an embodiment of this utility model.

[0028] Figure 3 This is a schematic diagram illustrating the working principle of the heater in a fuel filter including an insert-type annular heater, as described in an embodiment of this utility model.

[0029] In the picture:

[0030] 1. Fuel filter element; 1.1. Central tube; 2. Fuel filter housing; 2.1. Support step; 2.2. Fuel inlet; 2.3. Fuel outlet; 3. Annular heater; 3.1. Support structure; 3.1.1. Support block; 3.1.2. Support frame; 3.2. Heating element; 3.3. Temperature control switch; 3.4. Sealing ring; 3.5. Mounting flange; 3.5.1. Bolt through hole; 3.5.2. Sealing ring groove; 3.6. Heater body; 3.6.1. Inner metal sheet; 3.6.2. Outer metal sheet;

[0031] a. Fuel enters the inlet; b. Fuel passes through the annular heater and enters the fuel filter; c. Fuel passes through the central tube; d. Fuel enters the outlet. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements to the shape of the opening without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0033] Any preparation methods, materials, structures, or composition ratios not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0034] It should be noted that the terms "front," "rear," "left," "right," "up," "down," "inner," and "outer" used in this application to indicate directions or positional relationships are based on the directions or positional relationships indicated in the accompanying drawings. These terms are used to make the description of this application more concise and clear, and do not imply that the inserted annular heater system or component must have a definite orientation limitation. Therefore, they should not be considered as limitations on this application. Furthermore, the embodiments described in this application are only a part of the embodiments of this utility model and cannot represent all embodiments. Other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0037] Example

[0038] refer to Figure 1-2 This embodiment provides an insertable annular heater for a fuel filter. The insertable annular heater is an annular heater 3, used for a fuel filter. The fuel filter includes a fuel filter element 1, a fuel filter housing 2, and an annular heater 3.

[0039] The annular heater 3 surrounds the fuel filter element 1 and is connected to the fuel filter housing 2. The annular heater 3 includes a support structure 3.1, a heating element 3.2, a temperature control switch 3.3, a sealing ring 3.4, a mounting flange 3.5, and a heater body 3.6. The heater body 3.6 is connected to the support structure 3.1 and the mounting flange 3.5. The mounting flange 3.5 is used to mount the annular heater 3 onto the fuel filter housing 2. A sealing ring 3.4 is installed on the mounting flange 3.5 to ensure a tight seal when the annular heater 3 is connected to the fuel filter housing 2. The heating element 3.2 is arranged on the heater body 3.6. The temperature control switch 3.3 is connected to the mounting flange 3.5.

[0040] The mounting surface of the mounting flange 3.5 is connected to the supporting structure 3.1, the heater body 3.6, the temperature control switch 3.3, and the sealing ring 3.4.

[0041] Multiple heating elements 3.2 are evenly arranged on the heater body 3.6.

[0042] The heater body 3.6 is an annular heater body.

[0043] The temperature control switch 3.3 is used to control the opening and closing of the annular heater 3 according to the monitored air temperature; the temperature control switch 3.3 is arranged facing the fuel filter element 1.

[0044] The heater body 3.6 includes an inner metal sheet 3.6.1 and an outer metal sheet 3.6.2; the inner metal sheet 3.6.1 is connected to the outer metal sheet 3.6.2; the inner metal sheet 3.6.1 is located inside the outer metal sheet 3.6.2; the heating element 3.2 is connected to the outer metal sheet 3.6.2.

[0045] The mounting flange 3.5 has bolt through holes 3.5.1 for mounting and fixing the annular heater 3 to the fuel filter housing 2 with bolts; the mounting flange 3.5 has a sealing ring groove 3.5.2, and the sealing ring 3.4 is located in the sealing ring groove 3.5.2; the bolt through holes 3.5.1 are located outside the sealing ring groove 3.5.2.

[0046] The support structure 3.1 includes a support block 3.1.1 and a support frame 3.1.2. The support block 3.1.1 is connected to the support frame 3.1.2. The support block 3.1.1 is located on the side away from the mounting flange 3.5. The heater body 3.6 is connected to the support frame 3.1.2. The support frame 3.1.2 is connected to the mounting surface of the mounting flange 3.5.

[0047] The temperature control switch 3.3 is a commercially available conventional temperature control switch, and this utility model does not improve the working principle of the temperature control switch.

[0048] The heating element 3.2 is a commercially available conventional temperature control switch, and the working principle of the heating element has not been improved in this utility model.

[0049] Both the inner metal sheet 3.6.1 and the outer metal sheet 3.6.2 are conductive and thermally conductive metal sheets.

[0050] This embodiment also provides a fuel filter including an insertable annular heater, the fuel filter further including a fuel filter element 1 and a fuel filter housing 2.

[0051] Fuel filter element 1 is the main component for filtering fuel and is the target material that needs to be heated to prevent wax from forming on its surface. Fuel filter housing 2 is the main cavity that makes up the fuel filter. Annular heater 3 surrounds the lower half of fuel filter element 1 and mainly heats the surrounding area to ensure that fuel flows smoothly through fuel filter element 1. The annular heater 3 is inserted into and installed on the fuel filter housing 2 from the side. Its distal end has a support block 3.1.1 of support structure 3.1 that cooperates with the support step 2.1 on the fuel filter housing 2 to ensure the stable installation of annular heater 3 and reduce the impact disturbance caused by fuel flow.

[0052] The annular heater 3 is connected to the fuel filter housing 2. The annular heater 3 is arranged to surround the lower half of the fuel filter element 1.

[0053] The fuel filter housing 2 is provided with a support step 2.1; the support structure 3.1 is connected to the support step 2.1.

[0054] The fuel filter housing 2 includes an inlet 2.2 and an outlet 2.3; the inlet 2.2 is located on the side of the fuel filter housing 2; and the outlet 2.3 is located on the bottom surface of the fuel filter housing 2.

[0055] The fuel filter element 1 includes a central tube 1.1; the central tube 1.1 is connected to the fuel outlet 2.3.

[0056] When installing the fuel filter, first insert the annular heater 3 from the side and install it onto the fuel filter housing 2 through the support block 3.1.1 of the support step 2.1. Then connect the fuel filter element 1 to the fuel filter housing 2, with the annular heater 3 surrounding the lower half of the fuel filter element 1.

[0057] The above-mentioned method for operating a fuel filter including an insert-type annular heater includes the following steps:

[0058] like Figure 3 As shown, at low temperatures, the temperature control switch 3.3 on the annular heater 3 closes, causing the annular heater 3 to start working. Fuel enters from the inlet 2.2 on the fuel filter housing 2, flowing in direction a, and is heated by the annular heater 3 before entering the fuel filter element 1, flowing in direction b. After passing through the fuel filter element 1, the fuel flows through the internal central tube 1.1, flowing in direction c, and finally flows out from the fuel outlet 2.3, flowing in direction d. The fact that the fuel at low temperatures is first heated by the annular heater 3 before flowing through the fuel filter element 1 effectively prevents wax buildup on the surface of the fuel filter element 1 and avoids clogging the filter element, thus preventing the fuel filter (fuel filter) from functioning properly.

[0059] The embodiments described herein are provided to enable those skilled in the art to understand and use this invention. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, this invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of this invention without departing from its scope should be within the protection scope of this invention.

Claims

1. An insertable annular heater for a fuel filter, the insertable annular heater being an annular heater (3), for a fuel filter comprising a fuel filter element (1), a fuel filter housing (2), and an annular heater (3), the annular heater (3) being arranged around the fuel filter element (1), and the annular heater (3) being connected to the fuel filter housing (2), characterized in that, The annular heater (3) includes a support structure (3.1), a heating element (3.2), a temperature control switch (3.3), a sealing ring (3.4), a mounting flange (3.5), and a heater body (3.6); The heater body (3.6) is connected to the support structure (3.1); The support structure (3.1) is connected to the mounting flange (3.5), which is used to mount the annular heater (3) onto the fuel filter housing (2); A sealing ring (3.4) is installed on the mounting flange (3.5), and the sealing ring (3.4) is used to ensure the seal when the annular heater (3) is connected to the fuel filter housing (2); The heating element (3.2) is arranged on the heater body (3.6); The temperature control switch (3.3) is connected to the mounting flange (3.5).

2. An insert-type annular heater for a fuel filter according to claim 1, characterized in that, Multiple heating elements (3.2) are evenly arranged on the heater body (3.6).

3. An insert-type annular heater for a fuel filter according to claim 1, characterized in that, The heater body (3.6) is an annular heater body. The temperature control switch (3.3) is used to control the opening and closing of the annular heater (3) according to the monitored air temperature; the temperature control switch (3.3) is arranged facing the fuel filter (1).

4. An insert-type annular heater for a fuel filter according to claim 1, characterized in that, The heater body (3.6) includes an inner metal sheet (3.6.1) and an outer metal sheet (3.6.2); The inner metal sheet (3.6.1) is connected to the outer metal sheet (3.6.2); The inner metal sheet (3.6.1) is disposed inside the outer metal sheet (3.6.2); The heating element (3.2) is connected to the outer metal sheet (3.6.2).

5. An insert-type annular heater for a fuel filter according to claim 1, characterized in that, The mounting flange (3.5) is provided with bolt through holes (3.5.1) to install and fix the annular heater (3) to the fuel filter housing (2) by bolts; A sealing ring groove (3.5.2) is provided on the mounting flange (3.5), and the sealing ring (3.4) is disposed in the sealing ring groove (3.5.2); The bolt through hole (3.5.1) is located outside the sealing ring groove (3.5.2).

6. A fuel filter comprising an insert-type annular heater for a fuel filter as described in any one of claims 1-5, characterized in that, The fuel filter also includes a fuel filter element (1) and a fuel filter housing (2); The annular heater (3) is arranged around the fuel filter element (1) and is connected to the fuel filter housing (2).

7. A fuel filter according to claim 6, characterized in that, The fuel filter housing (2) is provided with a support step (2.1); The support structure (3.1) is connected to the support step (2.1).

8. A fuel filter according to claim 6, characterized in that, The fuel filter housing (2) includes an inlet (2.2) and an outlet (2.3); The oil inlet (2.2) is located on the side of the fuel filter housing (2); The oil outlet (2.3) is located on the bottom surface of the fuel filter housing (2).

9. A fuel filter according to claim 8, characterized in that, The fuel filter element (1) includes a central tube (1.1); The central tube (1.1) is connected to the oil outlet (2.3).

10. A fuel filter according to claim 6, characterized in that, The annular heater (3) is arranged around the lower half of the fuel filter (1).

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