CN218209781U - Fuel oil warmer - Google Patents

Abstract

The utility model discloses a fuel oil warmer, which comprises an oil supply mechanism, wherein the oil supply mechanism is provided with an oil inlet, an oil outlet and an oil return port; the oil supply mechanism comprises an oil pump, an oil outlet channel and an oil return channel, the oil pump is provided with a pump inlet, a pump outlet and a power shaft, the pump inlet is communicated with the oil inlet, the oil outlet channel is connected between the pump outlet and the oil outlet, and the oil outlet channel is provided with an electromagnetic valve; the oil return passage is connected between the pump outlet and the oil return port, and the oil return passage is provided with a pressure release valve. When the oil pump is normally used, the oil outlet channel is communicated, the oil delivered by the oil pump can be conveyed to the combustor, and the oil delivered by the oil pump has enough pressure for combustion due to the arrangement of the pressure release valve; when the fuel oil warmer needs to be closed, the electromagnetic valve can be used for plugging the oil outlet channel, the combustor loses fuel oil supply, flame is extinguished, the fan can still be started to dissipate heat of waste heat of the combustion cylinder, although the oil pump still operates, fuel oil sent out from the pump outlet can flow back to the oil tank through the oil return channel, and damage caused by too large pressure in the oil pump is prevented.

Description

Fuel oil warmer

Technical Field

The utility model relates to a heating device field, in particular to fuel oil warmer.

Background

The fuel oil warmer takes diesel oil or kerosene as fuel, and generates heat by burning the diesel oil or the kerosene. The prior fuel oil warmer is provided with an independent oil pump for supplying oil to a burner; in order to reduce energy consumption and optimize the structure, a fuel oil warmer using an oil pump driven by a motor of a blower is manufactured. However, the fuel oil heater still has some disadvantages in the using process, for example, when the fuel oil heater is turned off, the oil pump and the fan need to be turned off at the same time, the fan cannot radiate the waste heat of the combustion cylinder, and the waste heat is easily transferred to the shell to cause scalding hands or transferred to the combustor to cause damage to components such as an ignition circuit.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a fuel oil warmer.

The fuel oil warmer comprises an oil supply mechanism, wherein the oil supply mechanism is provided with an oil inlet, an oil outlet and an oil return port; the oil supply mechanism comprises an oil pump, an oil outlet channel and an oil return channel, the oil pump is provided with a pump inlet, a pump outlet and a power shaft, the pump inlet is communicated with the oil inlet, the oil outlet channel is connected between the pump outlet and the oil outlet, and the oil outlet channel is provided with an electromagnetic valve; the oil return passage is connected between the pump outlet and the oil return port, and the oil return passage is provided with a pressure release valve.

According to the utility model discloses fuel oil warmer has following technological effect at least: when the oil pump is normally used, the oil outlet channel is communicated, the oil delivered by the oil pump can be conveyed to the combustor, and the oil delivered by the oil pump has enough pressure for combustion due to the arrangement of the pressure release valve; when the fuel oil heater needs to be closed, the electromagnetic valve can be plugged into the fuel oil outlet channel, the combustor loses fuel oil supply, flame is extinguished, the fan can still be started to dissipate heat of waste heat of the combustion cylinder, although the oil pump still operates, fuel oil sent out from the outlet of the pump can flow back to the oil tank through the oil return channel, and damage caused by too large pressure in the oil pump is prevented.

According to the utility model discloses a some embodiments, the mechanism that supplies oil includes the oil feed passageway, the oil feed passageway connect in the pump inlet with between the oil inlet, the oil feed passageway is equipped with the filter. Foreign matters in the fuel can be prevented from entering the oil pump, the oil pump can run smoothly, and the service life of the oil pump is prolonged.

According to some embodiments of the invention, the pressure relief valve is provided with a valve cavity, the valve cavity is provided with a first cavity part and a second cavity part, the first cavity part is provided with a first interface and a second interface, the first interface is communicated to the pump outlet, and the second interface is communicated to the oil return port; the valve cavity is internally provided with a piston, the piston cover is arranged on the first interface, an elastic part is connected between the piston and the pressure release valve, and the stroke end point of the piston is arranged on the second cavity part. When the pressure of the fuel at the first interface is overlarge, the fuel can push the piston to move to the second cavity part, so that the first interface is communicated with the second interface, and the purpose of pressure relief is achieved.

According to some embodiments of the utility model, the valve pocket is equipped with and opens the mouth, it is equipped with the shutoff piece to open the mouth, the shutoff piece with relief valve threaded connection, the piston is located the shutoff piece with between the first interface, the elastic component is located the piston with between the shutoff piece. The rotary plugging piece can adjust the force applied by the elastic piece to the piston, namely the pressure relief threshold value of the pressure relief valve is adjustable, and the fuel oil warmer can adapt to more use scenes.

According to some embodiments of the invention, the elastic member is a spring. Thus, the structure is simple and the arrangement is convenient.

According to some embodiments of the invention, the power shaft extends to the left from the oil pump, and the pump inlet and the pump outlet are both located on the right side of the oil pump; the right side of oil pump is equipped with the base, the relief valve is located the base. The pressure relief valve can be directly installed on the oil pump, so that the oil pump and the pressure relief valve can be conveniently and integrally assembled and disassembled, and the fuel oil warmer is more convenient to assemble and maintain.

According to some embodiments of the invention, the blocking element is provided on the right side of the base. The power shaft does not obstruct the adjustment of the plugging piece, and the plugging piece is convenient to adjust.

According to the utility model discloses a some embodiments, fuel oil warmer still includes motor, fan blade, a burning section of thick bamboo and oil tank, the oil inlet with the oil return opening communicates respectively to the oil tank, the oil-out communicate to a burning section of thick bamboo, fan blade, motor, fuel feeding mechanism set up from a left side to the right side in order, the power shaft with the fan blade all with the drive shaft linkage of motor. The structure is reasonable and compact, the flow direction of the airflow driven by the fan blade flows from right to left through the oil supply mechanism, the motor, the fan blade and the combustion cylinder, and the heat of the oil pump can be dissipated.

According to some embodiments of the present invention, the combustion cylinder, the fan blade and the motor are collectively referred to as a first component, and the oil tank is provided at a lower side of the first component. The oil tank has larger mass after fuel is added, and the oil tank is arranged at the lower side to be favorable for keeping stable when the fuel warmer is used.

According to some embodiments of the present invention, the combustion cylinder is provided with a combustion chamber, the combustion cylinder comprises an outer cylinder and an inner cylinder, the outer cylinder is sleeved with a spacer sleeve outside the inner cylinder, and the combustion chamber is provided within the inner cylinder. Because the outer cylinder and the inner cylinder are sleeved at intervals, and a gap is arranged between the outer cylinder and the inner cylinder, the heat of the inner cylinder is prevented from being transferred to the outer cylinder.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a fuel oil warmer according to an embodiment of the present invention;

fig. 2 is a perspective view of the oil supply mechanism of fig. 1;

fig. 3 is a cross-sectional enlarged schematic view of the oil supply mechanism in fig. 1;

FIG. 4 is a schematic cross-sectional view taken along direction A in FIG. 3;

FIG. 5 is a schematic cross-sectional view taken along the direction B in FIG. 3;

FIG. 6 is a schematic cross-sectional view taken along direction C of FIG. 3;

FIG. 7 is a schematic cross-sectional view taken along direction D in FIG. 3;

fig. 8 is a schematic sectional view in the direction E in fig. 3.

In the drawings:

100-oil tank; 110-a housing; 120-inner cylinder; 121-a first tubing; 122-a second tubing; 123-a third oil pipe; 130-an outer barrel; 300-a motor; 400-fan blades;

200-an oil supply mechanism; 210-a seat body; 211-an oil outlet; 212-oil return port; 213-oil inlet; 214-a power shaft; 215-a first gear; 216-a second gear; 220-a base; 221-a first via; 222-a first portion; 223-a second portion; 231-first section; 232-a second segment; 233-third section; 234-fourth segment; 235-fifth section; 236-sixth section; 237-seventh paragraph; 238-eighth paragraph; 241-first section; 242 — a first segment; 243-the first three segments; 244-first four segments; 245-the first fifth segment; 246-first sixth section; 270-a communication groove; 271-a filter; 272-a second bolt; 281-a piston; 282-a first bolt; 283-a spring; 290-solenoid valve.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and the meaning of larger, smaller, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

A fuel warmer according to an embodiment of the present invention is described below with reference to fig. 1 to 8.

The fuel oil warmer provided by the embodiment of the utility model comprises an oil supply mechanism 200, wherein the oil supply mechanism 200 is provided with an oil inlet 213, an oil outlet 211 and an oil return port 212; the oil supply mechanism 200 comprises an oil pump, an oil outlet channel and an oil return channel, wherein the oil pump is provided with a pump inlet, a pump outlet and a power shaft 214, the pump inlet is communicated with an oil inlet 213, the oil outlet channel is connected between the pump outlet and an oil outlet 211, and the oil outlet channel is provided with an electromagnetic valve 290; the oil return passage is connected between the pump outlet and the oil return port 212, and the oil return passage is provided with a pressure relief valve.

As shown in fig. 2 and 5, the oil pump is a gear pump, the oil pump includes a base 210, a power shaft 214, a first gear 215 and a second gear 216, the base 210 is provided with a first accommodating groove, the first gear 215 and the second gear 216 are both disposed in the first accommodating groove, the second gear 216 is annular, the second gear 216 is an internal gear, the second gear 216 is sleeved outside the first gear 215, the second gear 216 is rotatably disposed in the first accommodating groove, an axis of the second gear 216 is disposed below an axis of the first gear 215, such that a top of the second gear 216 is engaged with a top of the first gear 215, a bottom of the second gear 216 is separated from a bottom of the first gear 215, an oil suction cavity, i.e., a pump inlet, is formed between a front side of the second gear 216 and a front side of the first gear 215, an oil outlet, i.e., a pump outlet, is formed between a rear side of the second gear 216 and a rear side of the first gear 215, the first gear 215 is coaxially and fixedly connected to the power shaft 214, the power shaft 214 extends to the protruding out of the base 210, and the power shaft 214 is connected to the motor 300;

referring to fig. 3, a base 220 is disposed on the right side of a base body 210, the base 220 includes a first portion 222 and a second portion 223, the first portion 222 covers the right sides of an oil suction cavity and an oil outlet cavity, an oil outlet channel includes a first section 231, a second section 232, a third section 233 and a fourth section 234, referring to fig. 6, the first section 231 is disposed in the first portion 222 and communicated to the oil outlet cavity, the second section 232 is disposed in the base body 210, the second section 232 is a through hole extending left and right, two ends of the second section 232 are respectively communicated to the first section 231 and the third section 233, referring to fig. 4, the third section 233 is disposed in the base body 210, a spool of a solenoid valve 290 is disposed in the third section 233, the spool of the solenoid valve 290 can block the second section 232 so that fuel cannot flow from the second section 232 to the third section 233, the fourth section 234 is disposed in the base body 210, the fourth section 234 is a through hole extending front and back, two ends of the fourth section 234 are respectively communicated to the third section 233 and the oil outlet 211, and the oil outlet 211 is disposed on the front side surface of the base body 210;

the oil return channel includes a fifth section 235, a sixth section 236, a seventh section 237 and an eighth section 238, referring to fig. 6, the fifth section 235 is disposed on the first portion 222 and communicated to the oil outlet chamber, referring to fig. 3, the sixth section 236 is disposed on the first portion 222 and the sixth section 236 are through holes extending left and right, two ends of the sixth section 236 are respectively communicated to the fifth section 235 and the relief valve, the seventh section 237 is disposed on the first portion 222 and the seventh section 237 are through holes extending left and right, a right end of the seventh section 237 is communicated to the relief valve, a left end of the seventh section 237 penetrates through the first portion 222 and is communicated to the eighth section 238, the eighth section 238 is disposed on the seat body 210, the eighth section 238 extends left from a left end of the seventh section 237 and then extends downward to the oil return port 212, and the oil return port 212 is disposed on a front side of a bottom of the seat body 210;

the oil inlet passage comprises a first section 241, a first second section 242, a first third section 243, a first fourth section 244, a first fifth section 245 and a first sixth section 246, referring to fig. 4, the oil inlet 213 is arranged at the rear side of the bottom of the base body 210, the first section 241 is arranged on the base body 210, the first section 241 is communicated with the oil inlet 213, referring to fig. 6, the first second section 242 is a through hole extending left and right, two ends of the first second section 242 are respectively communicated with the first section 241 and the first third section 243, the first third section 243 is arranged on the first part 222, the first third section 243 extends from the right end of the first section 242 to the front lower side in an arc shape, referring to fig. 7 and 8, the first fourth section 244 extends from the lower end of the first third section 243 to the right and is communicated with the lower end of the filter 271, a cavity is arranged between the first part 222 and the second part 223, the cavity is the first fifth section 245, the filter 271 is arranged in the first fifth section 245, and the first sixth section 246 is arranged on the first part 222, the first section 246 is a through hole extending left and right, and the second section is communicated with the oil suction cavity 246;

the pressure relief valve is arranged in the cavity and comprises a cylindrical shell, a first bolt 282 (namely a plugging piece), a spring 283 and a piston 281, the cylindrical shell and the first part 222 can be an integral component, the first bolt 282 is transversely arranged, the first bolt 282 is screwed into the cylindrical shell from right to left, the first bolt 282 is in threaded connection with the inner wall of the cylindrical shell, a slide hole (namely a second cavity part) is arranged at the left end of the first bolt 282, the piston 281 is arranged in the slide hole and is in sliding connection with the slide hole from left to right, the spring 283 is arranged on the right side of the piston 281 in the slide hole, the piston 281 is covered at the right end (namely a first interface) of the sixth section 236 and the right end (namely a second interface) of the seventh section 237 from right to left, a gap between the piston 281 and the first part 222 is a first cavity part, the second part 223 is provided with a slide groove corresponding to a bolt head of the first bolt 282, the bolt head is arranged in the slide groove, the bolt head is in the slide groove, the structure of the bolt head is consistent with the structure of the piston 281, the bolt head is in sealed connection with the side wall of the slide groove, the first cavity can slide hole 221 can slide groove from left to right, and the first bolt head can be screwed into the slide groove, and the first bolt through hole 221 is provided with a first bolt 282;

the filter 271 is shown in fig. 8, the filter 271 is vertically arranged, the lower end of the filter 271 is an inlet section of the filter 271, the second portion 223 is provided with a communicating groove 270, the right end of the first four section 244 is communicated with the communicating groove 270, the lower end of the filter 271 is inserted into the communicating groove 270 from top to bottom, the top of the cavity is provided with a vertically arranged internal threaded hole, the upper end of the filter 271 is provided with a second bolt 272, the second bolt 272 is screwed into the internal threaded hole from top to bottom and connected with the filter 271, and the filter 271 can be taken out and replaced by screwing out the second bolt 272 from the internal threaded hole;

the oil supply process comprises the following steps: the fuel oil enters from the oil inlet 213, flows through the first section 241, the first second section 242, the first third section 243 and the first fourth section 244 and then enters the filter 271, the fuel oil flowing out of the filter 271 flows to the second inner cavity and then enters the oil suction cavity through the first sixth section 246; after being pressurized by the oil pump, the fuel flows to the first section 231 and the second section 232 from the fuel outlet cavity, when the electromagnetic valve 290 is electrified and the valve core does not cover the second section 232, the fuel flows through the third section 233 and the fourth section 234 from the second section 232 and is reserved from the fuel outlet 211; when the solenoid valve 290 is de-energized, the valve core covers the second section 232, or the pressure of the oil outlet cavity is too high, the fuel flows from the oil outlet cavity to the fifth section 235 and the sixth section 236, the piston 281 is pushed to the right under the action of the oil pressure, so that the fuel can flow to the seventh section 237 through the first cavity part, then flows through the eighth section 238 and is discharged from the oil return port 212.

When the oil pump is normally used, the oil outlet channel is communicated, the oil delivered by the oil pump can be conveyed to the combustor, and the oil delivered by the oil pump has enough pressure for combustion due to the arrangement of the pressure release valve; when the fuel oil warmer needs to be closed, the electromagnetic valve 290 can be used for plugging the oil outlet channel, so that the combustor loses fuel oil supply, flame is extinguished, the fan can still be started to dissipate heat of waste heat of the combustion cylinder, although the oil pump still operates, fuel oil sent out from the pump outlet can flow back to the oil tank 100 through the oil return channel, and damage caused by too large pressure in the oil pump is prevented.

In some embodiments of the present invention, the oil supply mechanism 200 includes an oil inlet channel, the oil inlet channel is connected between the pump inlet and the oil inlet 213, and the oil inlet channel is provided with a filter 271. Therefore, foreign matters in fuel oil can be prevented from entering the oil pump, the oil pump can smoothly run, and the service life of the oil pump is prolonged.

In some embodiments of the present invention, the relief valve is provided with a valve cavity, the valve cavity is provided with a first cavity part and a second cavity part, the first cavity part is provided with a first interface and a second interface, the first interface is communicated to the pump outlet, and the second interface is communicated to the oil return port 212; a piston 281 is arranged in the valve cavity, the piston 281 covers the first interface, an elastic part is connected between the piston 281 and the pressure release valve, and the stroke end point of the piston 281 is arranged in the second cavity. Therefore, when the pressure of the fuel at the first interface is too high, the fuel can push the piston 281 to move to the second cavity part, so that the first interface is communicated with the second interface, and the purpose of pressure relief is achieved.

In some embodiments of the utility model, the valve pocket is equipped with and opens the mouth, opens the mouth and is equipped with the shutoff piece, shutoff piece and relief valve threaded connection, and piston 281 is located between shutoff piece and the first interface, and the elastic component is located between piston 281 and the shutoff piece. The rotary plugging piece can adjust the force applied by the elastic piece to the piston 281, namely the pressure relief threshold value of the pressure relief valve is adjustable, and the fuel warmer can adapt to more use scenes.

In some embodiments of the present invention, the elastic member is a spring 283. Thus, the structure is simple and the arrangement is convenient.

In some embodiments of the present invention, the power shaft 214 extends to the left from the oil pump, and the pump inlet and the pump outlet are both disposed on the right side of the oil pump; the right side of oil pump is equipped with base 220, and the relief valve is located base 220. The pressure relief valve can be directly installed on the oil pump, so that the oil pump and the pressure relief valve can be conveniently and integrally assembled and disassembled, and the fuel oil warmer is more convenient to assemble and maintain.

In some embodiments of the present invention, the blocking member is disposed on the right side of the base 220. The power shaft 214 does not interfere with the adjustment of the block piece and facilitates the adjustment of the block piece.

In some embodiments of the utility model, the fuel oil warmer further comprises a motor 300, a fan blade 400, a combustion cylinder and an oil tank 100, wherein the oil inlet 213 and the oil return port 212 are respectively communicated to the oil tank 100, the oil outlet 211 is communicated to the combustion cylinder, the fan blade 400, the motor 300 and the oil supply mechanism 200 are sequentially arranged from left to right, and the power shaft 214 and the fan blade 400 are linked with the driving shaft of the motor 300. Referring to fig. 1, a driving shaft of a motor 300 is transversely arranged and extends out from the left end and the right end of the motor 300, a fan blade 400 is arranged at the left end of the driving shaft, and a power shaft 214 is connected to the right end of the driving shaft; the oil inlet 213 is connected to the oil tank 100 through a first oil pipe 121, and the first oil pipe 121 is inserted into the bottom of the oil tank 100 so as to suck oil even when the oil in the oil tank 100 is not full; the oil return port 212 is connected to the oil tank 100 through the second oil pipe 122, and the second oil pipe 122 may be inserted into the bottom of the oil tank 100 or only into the top of the oil tank 100; the oil outlet 211 is connected to the combustion cylinder through a third oil pipe 123; therefore, the structure is reasonable and compact, the fan blade 400 drives the airflow to flow through the oil supply mechanism 200, the motor 300, the fan blade 400 and the combustion cylinder from right to left, and the heat of the oil pump can be dissipated.

In some embodiments of the present invention, the combustion cylinder, the fan 400 and the motor 300 are collectively referred to as a first assembly, and the oil tank 100 is provided at a lower side of the first assembly. The first assembly and the fuel tank 100 may be disposed on the same base frame for ease of overall handling; the outer side of the first component can be provided with a casing 110 to concentrate airflow driven by the fan blade 400, so that the airflow velocity is higher, and the fuel oil can be fully combusted; after fuel is added into the fuel tank 100, the fuel tank 100 is large in mass, and the fuel tank 100 is arranged on the lower side, so that the fuel tank is favorable for keeping stability when the fuel warmer is used.

In some embodiments of the present invention, the combustion cylinder is provided with a combustion chamber, the combustion cylinder comprises an outer cylinder 130 and an inner cylinder 120, the outer cylinder 130 is sleeved outside the inner cylinder 120, and the combustion chamber is disposed inside the inner cylinder 120. The combustion cylinder also comprises a combustor, the combustor is provided with an oil nozzle and an igniter, the third oil pipe 123 is connected to the oil nozzle, and the combustion nozzle is arranged at the right end of the inner cylinder 120; since the outer cylinder 130 and the inner cylinder 120 are sleeved at an interval, a gap is formed between the outer cylinder 130 and the inner cylinder 120 to prevent heat of the inner cylinder 120 from being transferred to the outer cylinder 130.

The above description is for the purpose of illustrating the preferred embodiments of the present invention, but the present invention is not limited to the illustrated embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the appended claims.

Claims (10)

1. A fuel oil warmer is characterized in that: the oil supply device comprises an oil supply mechanism (200), wherein the oil supply mechanism (200) is provided with an oil inlet (213), an oil outlet (211) and an oil return port (212); the oil supply mechanism (200) comprises an oil pump, an oil outlet channel and an oil return channel, the oil pump is provided with a pump inlet, a pump outlet and a power shaft (214), the pump inlet is communicated with the oil inlet (213), the oil outlet channel is connected between the pump outlet and the oil outlet (211), and the oil outlet channel is provided with an electromagnetic valve (290); the oil return passage is connected between the pump outlet and the oil return opening (212), and the oil return passage is provided with a pressure release valve.

2. The fuel warmer of claim 1, wherein: the oil supply mechanism (200) comprises an oil inlet channel, the oil inlet channel is connected between the pump inlet and the oil inlet (213), and the oil inlet channel is provided with a filter (271).

3. The fuel warmer of claim 1, wherein: the pressure relief valve is provided with a valve cavity which is provided with a first cavity part and a second cavity part, the first cavity part is provided with a first interface and a second interface, the first interface is communicated with the outlet of the pump, and the second interface is communicated with the oil return port (212); a piston (281) is arranged in the valve cavity, the piston (281) is covered on the first interface, an elastic piece is connected between the piston (281) and the pressure release valve, and the stroke end point of the piston (281) is arranged in the second cavity part.

4. The fuel warmer according to claim 3, wherein: the valve cavity is provided with an open hole, the open hole is provided with a blocking piece, the blocking piece is in threaded connection with the pressure release valve, the piston (281) is arranged between the blocking piece and the first interface, and the elastic piece is arranged between the piston (281) and the blocking piece.

5. The fuel warmer of claim 4, wherein: the elastic element is a spring (283).

6. The fuel warmer of claim 4, wherein: the power shaft (214) extends out of the oil pump leftwards, and the pump inlet and the pump outlet are both arranged on the right side of the oil pump; the right side of oil pump is equipped with base (220), the relief valve is located base (220).

7. The fuel warmer of claim 6, wherein: the plugging piece is arranged on the right side of the base (220).

8. The fuel warmer of claim 6, wherein: the fuel oil warmer further comprises a motor (300), a fan blade (400), a combustion cylinder and an oil tank (100), wherein the oil inlet (213) and the oil return port (212) are communicated to the oil tank (100) respectively, the oil outlet (211) is communicated to the combustion cylinder, the fan blade (400), the motor (300) and the oil supply mechanism (200) are sequentially arranged from left to right, and the power shaft (214) and the fan blade (400) are linked with a driving shaft of the motor (300).

9. The fuel warmer of claim 8, wherein: the combustion cylinder, the fan blade (400) and the motor (300) are jointly called as a first assembly, and the oil tank (100) is arranged on the lower side of the first assembly.

10. The fuel warmer of claim 8, wherein: the combustion cylinder is provided with a combustion chamber, the combustion cylinder comprises an outer cylinder (130) and an inner cylinder (120), the outer cylinder (130) is sleeved on the outer side of the inner cylinder (120) at intervals, and the combustion chamber is arranged in the inner cylinder (120).

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