Fuel oil heating device and fuel oil filter

Abstract

The utility model provides a fuel oil heating device and fuel oil filter, the fuel oil heating device comprises a shell, a temperature control element, a heating assembly, a heat transfer element and a power supply unit, the shell is installed on the fuel oil filter body, the temperature control element is arranged in an installation groove, and the heating assembly and the heat transfer element are respectively arranged in a first installation hole and a second installation hole. And the oil cylinder extends into the fuel filter body. After a vehicle flames out, power can be supplied to the heating assembly through an external power source, the temperature of fuel oil in the fuel oil filter is transmitted to the temperature sensing face of the temperature control element through the heat transfer element, the temperature control element controls the heating assembly to heat the fuel oil in the filter body, wax precipitation and freezing of the fuel oil in the filter body are prevented, and the problem that the fuel oil in the filter body cannot be heated under the low-temperature condition is solved. The fuel circulation time is long, and the vehicle is difficult to start. The temperature control element is installed in the shell and can sense the fuel oil temperature in time through the heat transfer element, accurate temperature control can be achieved, fuel oil is prevented from being heated excessively, and energy waste is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel heating, and in particular relates to a fuel heating device and a fuel filter. Background Art

[0002] Diesel can be used as engine fuel, but in low temperature environment, the viscosity, fluidity and atomization effect of diesel will be affected by low temperature, which will easily lead to incomplete combustion. In severe cases, it may even cause wax precipitation and ice clogging of the filter, affecting the normal operation of the fuel system and engine. In the cold winter, when a vehicle is parked for a long time at night, it will be difficult to start the vehicle in the morning. Therefore, adding a fuel preheating device to the fuel system has become an urgent need in the automotive market. Utility Model Content

[0003] The utility model provides a fuel heating device and a fuel filter, aiming to solve the problem in the prior art that a vehicle is difficult to start after being turned off and parked in a low-temperature environment.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] In a first aspect, the utility model provides a fuel heating device, comprising:

[0006] A housing having a mounting groove at one end and a first mounting hole and a second mounting hole at the other end, wherein the first mounting hole and the second mounting hole are respectively connected to the mounting groove;

[0007] A temperature control element is disposed in the mounting groove, and a temperature sensing surface of the temperature control element corresponds to the second mounting hole;

[0008] A heating component is arranged in the first mounting hole, a heating end of the heating component extends out of the first mounting hole, the heating component is electrically connected to the temperature control element, and the heating component is connected to a power supply unit through positive and negative wires, and the power supply unit is a vehicle-mounted power supply or an external power supply; and

[0009] The heat transfer element is arranged in the second mounting hole, one end of the heat transfer element extends out of the second mounting hole, and the other end abuts against the temperature sensing surface of the temperature control element.

[0010] In a possible implementation, the shell has a first mounting hole and a second mounting hole at one end and also has a first glue sealing groove, the first mounting hole and the second mounting hole pass through the first glue sealing groove, a first sealing glue part is provided in the first sealing groove, and the heating component and the heat transfer element pass through the first sealing glue part respectively.

[0011] In a possible implementation, a second sealant portion is provided in the installation groove, and the temperature control element is accommodated in the second sealant portion.

[0012] In a possible implementation, a first sealing groove is further formed on the outer periphery of the shell, and a first sealing ring is provided in the first sealing groove.

[0013] In a possible implementation, a portion of the heat transfer element accommodated in the second mounting hole is provided with a second sealing groove on its outer circumference, and a second sealing ring is provided in the second sealing groove.

[0014] In a possible implementation, an annular limiting boss is formed on the inner wall of the second mounting hole, and a limiting protrusion abutting against a side of the limiting boss adjacent to the mounting groove is formed on the outer periphery of the heat transfer element.

[0015] In a possible implementation, a fixing plate is detachably provided in the mounting groove, the fixing plate is provided on a side of the temperature control element facing away from the heat transfer element, and applies a pre-tightening force to the temperature control element so as to abut against the heat transfer element, and the heating assembly and the temperature control element are electrically connected to the fixing plate respectively.

[0016] In a possible implementation, the heating component includes:

[0017] a housing, disposed in the first mounting hole, one end of the housing extending out of the first mounting hole, and a heating element disposed in the housing; and

[0018] The electrode is arranged in the shell and is electrically connected to the temperature control element and the heating element.

[0019] In a possible implementation, the heating element is a PTC heating element.

[0020] Compared with the prior art, the fuel heating device provided by the utility model has the following beneficial effects:

[0021] The fuel heating device provided by the utility model comprises a housing, a temperature control element, a heating component, a heat transfer element and a power supply unit. The power supply unit is a vehicle-mounted power supply or an external power supply. When in use, the housing is mounted on the fuel filter body, and the heating component is powered by the power supply unit. The temperature control element is arranged in the mounting groove, and the heating component and the heat transfer element are arranged in the first mounting hole and the second mounting hole respectively, and extend into the fuel filter body. The temperature of the fuel inside the fuel filter is transferred to the temperature sensing surface of the temperature control element through the heat transfer element, and the temperature control element controls the operation of the heating component, so as to heat the fuel inside the filter body.

[0022] The fuel heating device provided by the utility model can be powered by a vehicle power supply or an external power supply, and the temperature control element can control the on-off of the circuit. The power supply unit, the heating component and the temperature control element are combined to preheat the fuel in the filter body after the vehicle is parked and turned off, so as to prevent the fuel in the filter body from waxing and freezing, and solve the problem of long fuel circulation time and difficulty in starting the vehicle under low temperature conditions. The temperature control element is installed inside the heating device, and the temperature control element can sense the fuel temperature in time through the heat transfer element, which helps to achieve accurate temperature control to avoid overheating of the fuel and reduce energy waste.

[0023] In a second aspect, the utility model provides a fuel filter, comprising:

[0024] a filter body; and

[0025] In the fuel heating device as described in any of the above implementations, the shell is connected to the filter body, and the heating component and the portion of the heat transfer element extending out of the shell are respectively accommodated in the filter body.

[0026] In a possible implementation, the heating component is electrically connected to an external power source through the positive and negative wires;

[0027] An independent heater is also provided in the filter body, and the independent heater is electrically connected to the vehicle power supply. When the vehicle is running, the independent heater is powered by the vehicle power supply. When the vehicle is turned off and the power is cut off, the fuel heating device is powered by an external power supply.

[0028] In a possible implementation, the positive and negative wires are connected in series with a switch, and the switch is used to control the positive and negative wires to be electrically connected to an external power supply or a vehicle-mounted power supply.

[0029] The fuel filter provided by the utility model adopts the fuel heating device in any of the above-mentioned implementation modes, and has the same technical effect as the above-mentioned fuel heating device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a fuel heating device provided in one embodiment of the utility model;

[0031] Figure 2 An internal cross-sectional view of a fuel heating device provided in one embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of the structure of a housing in one embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the housing and the fixing plate in one embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the structure of a heat transfer element in one embodiment of the utility model;

[0035] Figure 6 A schematic diagram of the installation of a fuel heating device and a filter body provided in one embodiment of the utility model;

[0036] Figure 7 A circuit diagram of a fuel heating device provided in one embodiment of the utility model Figure 1 ;

[0037] Figure 8 A circuit diagram of a fuel heating device provided in one embodiment of the utility model Figure 2 .

[0038] Description of reference numerals:

[0039] 1. Fuel heating device; 10. Shell; 11. Mounting groove; 12. First mounting hole; 13. Second mounting hole; 131. Position limiting boss; 14. First glue sealing groove; 15. First sealing groove; 16. First sealing ring; 17. First sealing glue part; 20. Temperature control element; 30. Heating assembly; 31. Shell; 32. Heating element; 33. Electrode; 40. Heat transfer element; 41. Second sealing groove; 42. Second sealing ring; 43. Position limiting boss; 44. Convex rib; 50. Fixing plate; 51. Welding hole; 60. Positive and negative electrode wires; 61. Adapter harness; DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0043] Please also read Figures 1 to 8 The fuel heating device 1 and the fuel filter provided in the embodiment of the utility model are described below.

[0044] See also Figures 1 to 6 In the first aspect, the embodiment of the utility model provides a fuel heating device 1, comprising a housing 10, a temperature control element 20, a heating assembly 30 and a heat transfer element 40. A mounting groove 11 is provided at one end of the housing 10, and a first mounting hole 12 and a second mounting hole 13 are provided at the other end, and the first mounting hole 12 and the second mounting hole 13 are respectively connected to the mounting groove 11; the temperature control element 20 is arranged in the mounting groove 11, and the temperature sensing surface of the temperature control element 20 corresponds to the second mounting hole 13; the heating assembly 30 is arranged in the first mounting hole 12, and the heating end of the heating assembly 30 extends out of the first mounting hole 12, and the heating assembly 30 is electrically connected to the temperature control element 20; the heating assembly 30 is connected to a power supply unit through positive and negative wires 60, and the power supply unit can be a vehicle-mounted power supply (vehicle-mounted battery) or an external power supply (direct current or alternating current power supply); the heat transfer element 40 is arranged in the second mounting hole 13, and one end of the heat transfer element 40 extends out of the second mounting hole 13, and the other end abuts against the temperature sensing surface of the temperature control element 20.

[0045] Compared with the prior art, the fuel heating device 1 provided in the embodiment of the utility model has the following beneficial effects:

[0046] The fuel heating device 1 provided by the embodiment of the utility model comprises a housing 10, a temperature control element 20, a heating assembly 30, a heat transfer element 40 and a power supply unit. The power supply unit is a vehicle-mounted power supply or an external power supply. When in use, the housing 10 is mounted on the fuel filter body, and the heating assembly 30 is powered by the power supply unit. The temperature control element 20 is arranged in the mounting groove 11, and the heating assembly 30 and the heat transfer element 40 are respectively arranged in the first mounting hole 12 and the second mounting hole 13, and extend into the fuel filter body. The temperature of the fuel inside the fuel filter is transferred to the temperature sensing surface of the temperature control element 20 through the heat transfer element 40, and the temperature control element 20 controls the heating assembly 30 to work, so as to heat the fuel in the filter body.

[0047] The fuel heating device 1 provided by the embodiment of the utility model can be powered by a vehicle-mounted power supply or an external unit, and the temperature control element 20 can control the on-off of the circuit. The power supply unit, the heating component 30 and the temperature control element 20 are combined to preheat the fuel in the filter body after the vehicle is parked and turned off to prevent the fuel in the filter from waxing and freezing, thus solving the problem of long fuel circulation time and difficulty in starting the vehicle under low temperature conditions. The temperature control element 20 is installed inside the heating device, and the temperature control element 20 can sense the fuel temperature in time through the heat transfer element 40, which helps to achieve precise temperature control, avoid excessive heating of the fuel, and reduce energy waste.

[0048] In the embodiment of the utility model, the housing 10 has a mounting groove 11 for accommodating the heating component 30 and the temperature control element 20. A through hole is provided on one side of the mounting groove 11 for the positive and negative wires 60 to pass through. One end of the positive and negative wires 60 is connected to a switching harness 61, which can be connected to a power source such as a battery or an alternating current to achieve power connection. It can generally be obtained by integral injection molding. The heating component 30, the heat transfer element 40, the temperature control element 20, etc. are installed on the housing 10 by screws, bonding, riveting, clamping, etc.

[0049] The heat transfer element 40 is arranged on the temperature sensing surface of the temperature control element 20, and the heat transfer element 40 can be made of a material with excellent thermal conductivity such as metal. By setting the heat transfer element 40, the heat transfer effect is better than relying on the thickness of the plastic wall, and the heat transfer and temperature sensing speed is faster. In order to improve the heat conduction effect, a heat transfer plate can be arranged between the temperature sensing surface of the temperature control element 20 (such as the detection end of the temperature sensor) and the end face of the heat transfer element 40, and the heat transfer plate and the heat transfer element 40 are bonded together by a thermally conductive adhesive to increase the heat transfer effect.

[0050] like Figure 2 and Figure 5 The other end of the heat transfer element 40 extending out of the second mounting hole 13 is in direct contact with the fuel in the filter body for monitoring the fuel temperature. A plurality of ribs 44 are provided around the heat transfer element 40, and the ribs 44 are interference fit with the second mounting hole 13 during installation.

[0051] The temperature control element 20 is arranged in the installation groove 11, and is used to monitor the fuel temperature in real time, and control the heating component 30 to heat as needed, so that the fuel in the fuel filter is still within a relatively high temperature range after the engine is shut down, and the vehicle can be started smoothly when it is restarted. The temperature control element 20 can use an existing temperature control switch on the market, and the temperature control element 20 and the heating component 30 are connected in series to control the on and off of the circuit.

[0052] One end of the heat transfer element 40 extends into the filter body to directly contact the fuel and monitor the fuel temperature. The heat transfer element 40 is preferably made of metal with good thermal conductivity, but can also be made of other suitable materials. The heat transfer element 40 transmits the fuel temperature to the temperature control element 20. When the temperature is lower than the lower limit temperature of the temperature control element 20, the temperature control element 20 turns on to control the heating component 30 to start working and heat the fuel. When the fuel is gradually heated and the oil temperature rises to the disconnection temperature of the temperature control element 20, the temperature control element 20 is disconnected and the heating device stops working, so that the fuel temperature is maintained within a certain temperature range to prevent the fuel from being continuously heated.

[0053] It should be noted that since the purpose of this product is to heat the fuel filter after the vehicle is turned off and parked, at this time, the engine stops running and it is static heating. The fuel temperature distribution in the filter body is uneven, and the oil temperature near the heating component 30 is higher. In order to prevent the temperature control element 20 from being frequently opened and closed and affecting the service life, a relatively high disconnection temperature point can be set.

[0054] See also Figure 1 and Figure 2 In some possible embodiments, the housing 10 has a first sealing groove 14 at one end where the first mounting hole 12 and the second mounting hole 13 are formed. The first mounting hole 12 and the second mounting hole 13 penetrate the first sealing groove 14. A first sealing portion 17 is formed in the first sealing groove 14. The heating component 30 and the heat transfer element 40 penetrate the first sealing portion 17 respectively. After the heating component 30 and the heat transfer element 40 are installed, sealant can be poured into the first sealing groove 14. After the sealant is cured, the heating component 30 and the heat transfer element 40 are fixed.

[0055] See also Figure 1 , Figure 2 and Figure 6 A second sealant portion is provided in the installation groove 11. After the temperature control element 20 is installed, sealant can be poured into the installation groove 11 to fill the remaining space in the installation groove 11 to form a second sealant portion, and the temperature control element 20 is accommodated in the second sealant portion.

[0056] It can be understood that the first sealant portion 17 and the second sealant portion are obtained by pouring glue into the groove, which can improve the sealing protection performance of the product for its own electronic components. In order to avoid the first sealant portion 17 and the second sealant portion blocking other electronic components, Figure 2 and Figure 6 The first sealant portion 17 and the second sealant portion are not shown.

[0057] See also Figure 2 In some possible embodiments, a first sealing groove 15 is further formed on the outer periphery of the housing 10 , and a first sealing ring 16 is formed in the first sealing groove 15 .

[0058] See also Figure 2 and Figure 5 In some possible embodiments, the portion of the heat transfer element 40 accommodated in the second mounting hole 13 is provided with a second sealing groove 41 on its outer periphery, and a second sealing ring 42 is provided in the second sealing groove 41 .

[0059] This embodiment can improve the sealing performance of the product and prevent fuel leakage by providing a first sealing ring 16 on the outer periphery of the housing 10 and a second sealing ring 42 on the outer periphery of the heat transfer element 40. One or more first sealing rings 16 and second sealing rings 42 can be provided as needed.

[0060] See also Figure 2 and Figure 5 In some possible embodiments, the inner wall of the second mounting hole 13 is formed with an annular limiting boss 131, and the outer periphery of the heat transfer element 40 is formed with a limiting protrusion 43 that abuts against the side of the limiting boss 131 adjacent to the mounting groove 11. When installing, the heat transfer element 40 is inserted from the large diameter end into the second mounting hole 13 until the limiting protrusion 43 abuts against the limiting boss 131, and the heat transfer element 40 is installed in place. By providing the limiting protrusion 43 on the outer periphery of the heat transfer element 40 and the limiting boss 131 on the inner wall of the second mounting hole 13, the installation and positioning of the heat transfer element 40 is facilitated.

[0061] See also Figure 2 and Figure 4 In some possible embodiments, a fixing plate 50 is detachably provided in the mounting groove 11. The fixing plate 50 is provided on a side of the temperature control element 20 away from the heat transfer element 40, and applies a pre-tightening force to the temperature control element 20 against the heat transfer element 40. The heating component 30 and the temperature control element 20 are electrically connected to the fixing plate 50 respectively.

[0062] In this embodiment, a fixing plate 50 is installed inside the shell 10 for fixing the limit temperature control element 20 so that the temperature control element 20 is in close contact with the heat transfer element 40 to ensure a good heat transfer effect. A plurality of fixing holes are provided on the fixing plate 50, and a fixing boss that matches the fixing holes is provided in the mounting groove 11 of the shell 10. The fixing plate 50 is fixed to the fixing boss by screws.

[0063] The fixing plate 50 is provided with a plurality of welding holes 51, two of which are used for welding with the electrodes 33 of the heating assembly 30, and the other two welding holes 51 are used for welding with the positive and negative electrode wires 60. The electrode 33 welding structure can be a pin-type pin or a crimped wire structure, etc.

[0064] See also Figure 1 and Figure 2 In some possible embodiments, the heating assembly 30 includes a housing 31, a heating element 32 and an electrode 33. The housing 31 is disposed in the first mounting hole 12, one end of the housing 31 extends out of the first mounting hole 12, and the heating element 32 is disposed in the housing 31; the electrode 33 is disposed in the housing 31 and is electrically connected to the temperature control element 20 and the heating element 32. The positive and negative electrodes 33 are led out from the first mounting hole 12 to the mounting groove 11 to realize electrical connection with the temperature control element 20.

[0065] In this embodiment, the heating assembly 30 is composed of an electrode 33, a heating element 32 and a metal shell 31. The heating element 32 and the electrode 33 are isolated from the metal shell 31 by insulating materials, and the metal shell 31 is used to wrap and protect the internal components to prevent the live components from contacting the fuel.

[0066] After the positive and negative wires 60 are welded to the fixing plate 50, they pass through the side of the housing 10 and are connected to the power supply unit through the adapter harness 61. The heating element 32 can be a PTC element. Unlike the common PTC fuel heater, when an external power supply is used to power the heating device, the power supply unit can be a city charging pile or a household electricity 220V, or a foreign household electricity 120V, or a low-voltage electricity 12V or 24V adjusted by a converter. In order to meet the use of the heater under high-voltage power supply, a PTC element with high voltage resistance is used. The heating component 30 is designed with low power parameters, such as 75W or 60W or even lower, to avoid excessive heating of the fuel and save energy consumption.

[0067] See also Figure 6 In the second aspect, the embodiment of the utility model provides a fuel filter, including a filter body and a fuel heating device 1 provided in any of the above embodiments. The filter body can adopt the existing filter products on the market. The fuel heating device 1 is arranged on the filter body. The shell 10 of the fuel heating device 1 is connected to the filter body. The heating component 30 and the heat transfer element 40 extending out of the shell 10 are respectively accommodated in the filter body. The fuel heating device 1 is installed at the bottom of the filter, and can also be installed at other suitable positions, as long as the heating component 30 and the heat transfer element 40 can smoothly contact the fuel.

[0068] like Figure 7 As shown, in some possible embodiments, the heating component is electrically connected to an external power supply through positive and negative wires; an independent heater separated from the fuel heating device 1 is also provided in the filter body, and the independent heater is electrically connected to the vehicle power supply. During vehicle operation, the independent heater is powered by the vehicle power supply, and when the vehicle is turned off and the power is cut off, the fuel heating device is powered by the external power supply.

[0069] In this embodiment, the fuel heating device is used in conjunction with an independent heater. During vehicle operation, the independent heater works to heat the fuel in the filter body. After the vehicle is turned off and parked, the fuel heating device 1 is connected to an external power supply through the positive and negative wires 60 and the adapter harness 61, and external power supply is used solely for fuel heating after parking.

[0070] like Figure 8As shown, in some possible embodiments, the positive and negative wires are connected in series with a switch, and the switch is used to control the electrical connection between the positive and negative wires and the external power supply or the vehicle power supply. In this embodiment, the fuel heating device 1 is used as an integrated heater. By installing a converter to adjust the voltage, it can be used for heating after parking with the switch, and can also be used to heat the vehicle battery when the engine is running.

[0071] During vehicle operation, the fuel heating device 1 can be connected to the vehicle battery by switching on the switch, and the vehicle low voltage power supply can be used. During vehicle parking and ignition off, the fuel heating device 1 can be connected to an external power supply by switching on the switch, and the external unit can be high voltage power or low voltage power. When high voltage power is used, the high voltage power is matched with a converter to realize power supply.

[0072] It can be understood that the various parts in the above-mentioned embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the utility model specification has recorded various combination embodiments and can support different combination embodiments.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel oil heating device, characterized in that: include: A housing having a mounting groove at one end and a first mounting hole and a second mounting hole at the other end, wherein the first mounting hole and the second mounting hole are respectively connected to the mounting groove; A temperature control element is disposed in the mounting groove, and a temperature sensing surface of the temperature control element corresponds to the second mounting hole; A heating component is arranged in the first mounting hole, a heating end of the heating component extends out of the first mounting hole, the heating component is electrically connected to the temperature control element, and the heating component is connected to a power supply unit through positive and negative wires, and the power supply unit is a vehicle-mounted power supply or an external power supply; and The heat transfer element is arranged in the second mounting hole, one end of the heat transfer element extends out of the second mounting hole, and the other end abuts against the temperature sensing surface of the temperature control element.

2. The fuel heating device according to claim 1, characterized in that: The shell has a first mounting hole and a second mounting hole at one end and a first glue sealing groove. The first mounting hole and the second mounting hole pass through the first glue sealing groove. A first sealing glue portion is provided in the first sealing groove. The heating component and the heat transfer element pass through the first sealing glue portion respectively.

3. The fuel heating device according to claim 1, characterized in that: A second sealant portion is provided in the installation groove, and the temperature control element is accommodated in the second sealant portion.

4. The fuel heating device according to claim 1, characterized in that: The portion of the heat transfer element accommodated in the second mounting hole is provided with a second sealing groove on its outer periphery, and a second sealing ring is provided in the second sealing groove.

5. The fuel oil heating device according to claim 1, characterized in that: An annular limiting boss is formed on the inner wall of the second mounting hole, and a limiting protrusion abutting against a side of the limiting boss adjacent to the mounting groove is formed on the outer periphery of the heat transfer element.

6. The fuel heating device according to claim 1, characterized in that: A fixing plate is detachably provided in the installation groove. The fixing plate is provided on a side of the temperature control element away from the heat transfer element and applies a pre-tightening force to the temperature control element against the heat transfer element. The heating assembly and the temperature control element are electrically connected to the fixing plate respectively.

7. The fuel oil heating device according to claim 1, characterized in that: The heating assembly comprises: A housing, disposed in the first mounting hole, with one end of the housing extending out of the first mounting hole; a heating element disposed in the housing; and The electrode is arranged in the shell and is electrically connected to the temperature control element and the heating element.

8. A fuel filter, characterized in that: include: Filter body; as well as According to the fuel heating device as described in any one of claims 1 to 7, the shell is connected to the filter body, and the heating component and the portion of the heat transfer element extending out of the shell are respectively accommodated in the filter body.

9. The fuel filter according to claim 8, characterized in that: The heating component is electrically connected to an external power source through the positive and negative wires; An independent heater is also provided in the filter body, and the independent heater is electrically connected to the vehicle power supply. When the vehicle is running, the independent heater is powered by the vehicle power supply. When the vehicle is turned off and the power is cut off, the fuel heating device is powered by an external power supply.

10. The fuel filter according to claim 8, characterized in that The positive and negative electrode wires are connected in series with a switch, and the switch is used to control the positive and negative electrode wires to be electrically connected to an external power supply or a vehicle-mounted power supply.

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