阅读说明：本技术 一种柴油内燃机融蜡装置 (Wax melting device for diesel internal combustion engine ) 是由 张国良 于 2021-07-05 设计创作，主要内容包括：本发明提供了一种柴油内燃机融蜡装置,包括柴油发动机,所述柴油发动机上固定安装有喷油泵和排气管,所述喷油泵通过管路连接有泵阀组体,所述排气管上安装有传热装置,所述柴油发动机的一侧设置有油箱,所述油箱分别与所述泵阀组体和所述传热装置连接。本发明结构紧凑,停车状态下,通过清空供油通道内燃油的手段,有效解决了柴油内燃机结蜡堵塞问题,发动机正常运行时,流经发动机回油管内的燃油作为导热介质,把排放尾气中的余热带回油箱内部,迫使冬季低温情况下供油油箱内燃油融化。(The invention provides a wax melting device of a diesel internal combustion engine, which comprises a diesel engine, wherein an oil injection pump and an exhaust pipe are fixedly arranged on the diesel engine, the oil injection pump is connected with a pump valve assembly body through a pipeline, a heat transfer device is arranged on the exhaust pipe, an oil tank is arranged on one side of the diesel engine, and the oil tank is respectively connected with the pump valve assembly body and the heat transfer device. The diesel internal combustion engine has a compact structure, and the problem of wax deposition and blockage of the diesel internal combustion engine is effectively solved by means of emptying fuel oil in the oil supply channel in a parking state.)

1. A diesel internal combustion engine melts wax device which characterized in that: the fuel injection pump is fixedly provided with a fuel injection pump and an exhaust pipe, the fuel injection pump is connected with a pump valve assembly body through a pipeline, the exhaust pipe is provided with a heat transfer device, one side of the diesel engine is provided with a fuel tank, and the fuel tank is respectively connected with the pump valve assembly body and the heat transfer device.

2. The wax melting device for the diesel internal combustion engine according to claim 1, wherein: the internal portion of pump valve group is provided with intelligent control circuit board, install PTC electric heating assemblies in the inside position that is close to the bottom of oil tank, intelligent control circuit board with PTC electric heating assemblies electric connection.

3. The wax melting device for the diesel internal combustion engine according to claim 2, wherein: the pump valve assembly body is provided with a manual stop valve handle, an operation panel, a man-machine conversation indicator light and an instruction state light.

4. The wax melting device for the diesel internal combustion engine according to claim 2, wherein: the heat transfer device comprises a shell, the shell is fixed on the exhaust pipe, a heat pipe is arranged in the shell, the heat pipe penetrates through the exhaust pipe and extends to the interior of the exhaust pipe, a temperature sensor is arranged in the shell, the temperature sensor is electrically connected with the intelligent control circuit board, and a plurality of fins are arranged on the heat pipe.

5. The wax melting device for the diesel internal combustion engine according to claim 2, wherein: the oil pump is characterized in that an oil inlet, an oil outlet and an oil drainage port are installed at the top of the pump valve assembly body, an oil cup is arranged in the pump valve assembly body, the oil cup is connected with the oil inlet, the oil outlet and the oil drainage port respectively, a bidirectional oil pump and an electric valve are arranged between the oil inlet and the oil cup, and the bidirectional oil pump and the electric valve are connected in parallel.

6. The wax melting device for the diesel internal combustion engine according to claim 5, wherein: the diesel engine is fixedly provided with an air release valve, the air release valve is communicated with the oil injection pump, and the air release valve is electrically connected with the intelligent control circuit board.

7. The wax melting device for the diesel internal combustion engine according to claim 5, wherein: the top of the pump valve group body is also provided with an air flue interface, an oil path where the electric valve is located is provided with a branch, the air flue interface is connected with the branch, and an airflow blocking valve is arranged between the electric valve and the air flue interface.

8. The wax melting device for the diesel internal combustion engine according to claim 7, wherein: and a vehicle-mounted air pump is arranged on one side of the diesel engine and is communicated with the air passage interface.

9. The wax melting device for the diesel internal combustion engine according to claim 5, wherein: the oil inlet is connected with the oil tank, a diesel filter is arranged between the oil outlet and the oil injection pump, and the diesel filter is respectively connected with the oil outlet and the oil injection pump.

10. The wax melting device for the diesel internal combustion engine according to claim 5, wherein: the oil drain port, the oil injection pump and the heat transfer device are connected through a tee joint.

Technical Field

The invention relates to the field of transportation vehicles, engineering machinery, ships and other vehicles powered by diesel internal combustion engines, in particular to a wax melting device for a diesel internal combustion engine.

Background

Diesel engines are internal combustion engines fueled by diesel fuel. Diesel engines belong to the compression ignition type of engines, which are often also referred to as diesel engines under the name diesel, the main inventor.

Most of Chinese diesel oil comes from paraffin-based crude oil (such as Daqing crude oil), and the diesel oil has high alkane content, so that the cetane number is high; the cetane number of Daqing straight run diesel oil is as high as 68, but the cetane number of diesel oil fraction obtained by catalytic cracking processing is below 40.

The diesel oil is selected according to the temperature when the diesel oil is used. The diesel vehicle mainly selects the diesel oil with the last 5 brands, and selects the 0# diesel oil when the temperature is above 4 ℃; selecting-10 # diesel oil at the temperature of 4-5 ℃; selecting-20 # diesel oil at the temperature of-5 to-14 ℃; selecting-35 # diesel oil at-14 to-29 ℃; therefore, if the grade of the selected diesel oil is higher than the temperature, the paraffin-based diesel oil can be deposited on a fuel oil system of the engine to block an oil way, and the normal work of the engine is influenced.

Although the low-grade diesel oil and the high-grade diesel oil have a small price difference, the low-grade diesel oil has a relatively low price, but in winter with a cold environment, the low-grade diesel oil has the characteristic of being condensed due to cooling (wax deposition), so that a pipeline is blocked, the oil supply is not smooth, the normal work of a diesel engine is influenced, the economic benefit is increased for reducing the operation cost of a vehicle, and a wax melting solution which can deal with the cold environment is provided on the market to deal with the contradiction when a fuel supply system burns the low-grade diesel oil.

The wax melting schemes currently used on the market include:

1. the mode of laying a heating cable on the oil supply pipeline is that the limited electric energy of the vehicle is utilized to heat an oil passage;

2. the heating mode of the cooling liquid is that the heat energy of the cooling liquid is used for heating the fuel oil by utilizing a circulating channel of a cooling system of the original diesel engine;

3. the layout mode of the double fuel tanks is that a vehicle is provided with the double fuel tanks, two kinds of fuel oil with different condensation points are respectively filled, the engine is started by utilizing the fuel oil with the low condensation point, and the fuel oil channel is switched after the temperature of the engine reaches the normal temperature so as to achieve the purpose of saving the cost;

4. and (3) heating by using an oil-fired boiler.

The scheme has poor reliability, is less in applicable machine types, can increase oil consumption, seriously influences the service life of other parts, greatly changes the channel and oil way structure of the cooling system and increases the change cost.

Disclosure of Invention

The invention aims to provide a wax melting device for a diesel internal combustion engine, which heats fuel by using the waste heat of tail gas discharged by the diesel engine during working, effectively avoids the defects of various wax melting schemes, and realizes the purpose of safely and reliably using low-grade diesel oil to achieve energy conservation and emission reduction in winter environment.

The invention provides a wax melting device of a diesel internal combustion engine, which comprises a diesel engine, wherein an oil injection pump and an exhaust pipe are fixedly arranged on the diesel engine, the oil injection pump is connected with a pump valve assembly body through a pipeline, a heat transfer device is arranged on the exhaust pipe, an oil tank is arranged on one side of the diesel engine, and the oil tank is respectively connected with the pump valve assembly body and the heat transfer device.

Further, the pump valve unit is internally provided with an intelligent control circuit board, a PTC electric heating assembly is installed at a position close to the bottom inside the oil tank, and the intelligent control circuit board is electrically connected with the PTC electric heating assembly.

Furthermore, a manual stop valve handle, an operation panel, a man-machine conversation indicator light and an instruction state light are arranged on the pump valve assembly body.

Further, heat transfer device includes the shell, the shell is fixed on the blast pipe, be provided with the heat pipe in the shell, the heat pipe runs through the blast pipe and extends to inside the blast pipe, the inside temperature sensor that is provided with of shell, temperature sensor with intelligent control circuit board electric connection, be provided with a plurality of fins on the heat pipe.

Furthermore, an oil inlet, an oil outlet and an oil drainage port are installed at the top of the pump valve assembly body, an oil cup is arranged in the pump valve assembly body, the oil cup is connected with the oil inlet, the oil outlet and the oil drainage port respectively, a bidirectional oil pump and an electric valve are arranged between the oil inlet and the oil cup, and the bidirectional oil pump and the electric valve are connected in parallel.

Further, fixed mounting has the snuffle valve on the diesel engine, the snuffle valve with the injection pump intercommunication, the snuffle valve with intelligent control circuit board electric connection.

Furthermore, an air flue interface is further installed at the top of the pump valve assembly body, a branch is arranged on an oil way where the electric valve is located, the air flue interface is connected with the branch, and an airflow blocking valve is arranged between the electric valve and the air flue interface.

Further, a vehicle-mounted air pump is arranged on one side of the diesel engine and communicated with the air passage interface.

Further, the oil inlet is connected with the oil tank, a diesel filter is arranged between the oil outlet and the oil injection pump, and the diesel filter is respectively connected with the oil outlet and the oil injection pump.

Furthermore, the oil drain port, the oil injection pump and the heat transfer device are connected through a tee joint.

The invention has compact structure and strong practicability, before the diesel engine is started, the fuel oil is filled in the fuel supply channel through the pump valve assembly body, after the diesel engine is normally started, the controller in the pump valve assembly body collects signals of the ambient temperature, the temperature of the fuel tank and the temperature of the heat transfer device at any time, and adjusts the working state of each pump valve according to the working condition. When the temperature of the heat transfer device rises due to some unknown factors, an oil pump in the pump valve assembly is started in time to forcibly circulate fuel oil in the oil tank, so that heat in the heat transfer device is brought back to the oil tank, the fuel oil in the oil tank is controlled below a flash point temperature, after an engine is stopped, the oil pump in the pump valve assembly works in a reverse direction, the fuel oil retained in the oil supply channel is withdrawn into the oil tank in time, and the hidden trouble that the oil supply channel is blocked due to wax deposition in a low-temperature environment is completely eradicated; the influence on the service life of other parts is reduced; and the purpose of reducing the operation cost is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic view showing a pump valve assembly according to embodiment 1 of the present invention;

FIG. 3 is an internal structure of a pump valve assembly according to embodiment 1 of the present invention;

FIG. 4 is a schematic view showing a pump valve assembly according to embodiment 2 of the present invention;

FIG. 5 shows the internal structure of a pump valve assembly according to example 2 of the present invention;

FIG. 6 is a schematic view of a heat pipe heat exchanger of the present invention;

FIG. 7 is a schematic view of a side mounted heater according to the present invention;

description of reference numerals:

in the figure: 1-oil inlet, 2-oil outlet, 3-oil drain, 4-pump valve assembly, 5-diesel engine, 6-heat pipe heat exchanger, 7-air flue interface, 8-oil inlet pipe, 9-oil outlet pipe, 10-oil drain pipe, 11-oil tank, 12-PTC electric heating component, 21-diesel filter, 22-air release valve, 23-diesel engine oil inlet pipe, 40-control cable, 41-man-machine conversation indicator lamp, 42-operation panel, 43-manual stop valve, 44-filter oil cup, 45-cable interface, 46-instruction status lamp, 47-electric valve, 48-two-way oil pump, 49-one-way valve, 51-exhaust pipe, 52-diesel engine oil return pipe, 53-oil spray pump, 61-oil way interface, 62-temperature sensor, 63-oil cabin, 64-flange, 65-fin, 66-heat pipe, 67-oil tank return pipe and 71-airflow blocking valve;

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-3:

the utility model provides a diesel internal-combustion engine melts wax device, including diesel engine 5, install injection pump 53 and blast pipe 51 on the diesel engine 5, and diesel engine 5 and injection pump 53 and blast pipe 51 intercommunication, be fixed with a blow-off valve 22 and a diesel filter 21 on the diesel engine 5, the filter core of diesel filter 21 adopts filter paper more, also have to adopt felt or macromolecular material, the blow-off valve 22 is located the position in the middle of diesel engine 5, the diesel filter 21 is located the position near diesel engine 5 edge.

The diesel filter 21 is used for filtering harmful impurities and moisture in a fuel system, protecting the normal work of an engine, reducing abrasion, avoiding blockage and prolonging the service life of the engine.

The exhaust pipe 51 is provided with a heat transfer device, and the heat pipe heat exchanger 6 is selected as the heat transfer device.

A tee joint is arranged between the heat pipe heat exchanger 6 and the fuel injection pump 53, and two joints in the horizontal direction of the tee joint are respectively connected with the heat pipe heat exchanger 6 and the fuel injection pump 53.

As shown in fig. 6, a heat pipe heat exchanger 6 is disposed directly above the exhaust pipe 51, the heat pipe heat exchanger 6 is disposed vertically, the heat pipe heat exchanger 6 is fixedly connected to the exhaust pipe 51 through a flange 64, the heat pipe heat exchanger 6 includes an oil tank 63, a heat pipe 66 for transferring heat is disposed inside the oil tank 63, and the heat pipe 66 extends into the exhaust pipe 51 through the flange 64 and the exhaust pipe 51.

The heat pipe 66 is a heat transfer component with high heat conductivity, and the heat pipe heat exchanger 6 has the advantages of high heat transfer efficiency, compact structure, small pressure loss, being beneficial to controlling dew point corrosion and the like,

eighteen fins 65 horizontally arranged are fixed on the part of the heat pipe 66 positioned in the exhaust pipe 51, so that the heat absorption efficiency can be improved; ten vertically arranged fins 65 are fixed to a portion inside the cargo tank 63, which can improve heat dissipation efficiency.

The temperature sensor 62 is fixedly mounted on the inner wall of the oil tank 63 and used for monitoring the temperature of fuel in the oil tank 63, and the fuel is controlled below a flash point temperature to prevent danger.

Two opposite oil way interfaces 61 are fixed outside the oil tank 63, wherein one oil way interface 61 is connected with the oil tank 11, and the other oil way interface 61 is connected with a three-way interface.

As shown in figure 1, the interface vertically arranged on the three-way interface is connected with the pump valve assembly body 4, an intelligent control circuit board is fixedly arranged inside the pump valve assembly body 4, the intelligent control circuit board is electrically connected with the air release valve 22 and the temperature sensor 62 in the heat pipe heat exchanger 6 respectively, and the intelligent control circuit board controls the air release valve 22 to be opened and closed.

As shown in FIG. 2, the pump valve assembly 4 comprises a filter oil cup 44, the top of the filter oil cup 44 is connected with a housing, the top of the housing is provided with an oil inlet 1, an oil outlet 2 and an oil drain port 3, and the side surface of the housing is provided with an operation panel 42.

The pump valve assembly body 4 is fixed near the vehicle oil tank 11 through a mounting seat, occupies the mounting position of an oil-water separator used on an original vehicle, and replaces the oil-water separator of the original vehicle.

The operation panel 42 is provided at the outside thereof with a cover plate to prevent contaminants from being attached to the operation panel 42 during the driving of the vehicle.

Five buttons, namely a start button, a stop button, an oiling button, an oil receiving button and a preheating button, are arranged in the middle of the operation panel 42.

Six man-machine conversation indicating lamps 41 are arranged above the five buttons, the man-machine conversation indicating lamps 41 are positioned on the operation panel 42 close to the edge and are arranged in a single row along a straight line, and represent winter and summer, on-line, operation, oil pump, preheating and tank temperature from left to right respectively.

Four instruction status lights 46 and cable interface 45 are arranged on the side surface of the pump valve assembly body 4 adjacent to the operation panel 42, the cable interface 45 electrically connects the pump valve assembly body 4 with other components through the control cable 40, and the instruction status lights 46 are arranged in a single row along a straight line and are respectively a stop valve, an air release valve 22, a heating light and an oil pump light in sequence.

As shown in fig. 3, the oil inlet 1 is connected with the oil outlet 2, the filter oil cup 44 is connected in series in the oil path, a bidirectional oil pump 48 and an electric valve 47 are arranged between the oil inlet 1 and the filter oil cup 44, the bidirectional oil pump 48 and the electric valve 47 are connected in parallel in the oil path, a branch is arranged between the filter oil cup 44 and the oil outlet 2 and connected with the oil drain port 3, a manual stop valve 43 is connected in series in the branch oil path where the oil drain port 3 is located, and a check valve 49 is connected in series between the manual stop valve 43 and the oil drain port 3.

As shown in fig. 2, a groove is formed on the surface of the operation panel 42, a valve handle is fixedly installed in the groove, the valve handle is used for controlling the manual stop valve 43, the manual stop valve 43 is used for solving the problem that residual oil in the oil supply channel is condensed and blocked in order to deal with special conditions, the manual stop valve 43 forcibly dredges the pipeline by utilizing the strong pressure of the oil pump in the pump valve assembly 4, the manual stop valve 43 is operated through the valve handle, and the valve handle does not need to be operated at ordinary times.

As shown in fig. 1, a PTC electrical heating assembly 12 is disposed in the oil tank 11, the PTC electrical heating assembly 12 is electrically connected to an intelligent control circuit board in the pump valve assembly 4, the intelligent control circuit board automatically controls the operation of the PTC electrical heating assembly 12 and the associated pump valve components in the oil tank 11 according to an ambient temperature signal, a signal of a temperature sensor 62 in the heat pipe heat exchanger 6 and a resistance value of the PTC electrical heating assembly 12, and the components are connected to each other through a control cable 40 to operate cooperatively.

According to the electrical characteristics of the PTC electric heating component 12, the PTC electric heating component has the functions of heating and temperature measurement, the resistance value of the PTC electric heating component 12 changes along with the temperature, and the lower the temperature, the lower the resistance value; conversely, the higher the temperature, the higher the resistance.

The oil tank 11 is connected with the oil inlet 1 of the pump valve assembly body 4 through the oil inlet pipe 8 and is connected with the oil path interface 61 of the heat pipe heat exchanger 6 through the oil tank oil return pipe 67.

An oil outlet 2 on the pump valve group body 4 is connected with a diesel filter 21 through an oil outlet pipe 9, and the diesel filter 21 is connected with an oil injection pump 53 through a diesel oil inlet pipe 23.

The diesel engine oil return pipe 52 connected with the oil injection pump 53, the oil drain pipe 10 connected with the oil drain port 3 on the pump valve group body 4 and the oil path interface 61 of the heat pipe heat exchanger 6 are connected through a three-way interface.

In the present embodiment, when the vehicle is started at a low temperature, an operator controls the operation panel 42 through a remote controller or directly to control the PTC electric heating assemblies 12 in the fuel tank 11 to start in advance by using the intelligent control circuit, and then injects the liquefied fuel into the fuel supply channel through the bidirectional fuel pump 48 in the pump valve assembly.

The fuel in the oil tank 11 flows into the pump valve assembly body 4 from the oil inlet 1 through the oil inlet pipe 8, is divided through the electric valve 47 and the two-way oil pump 48, then is converged to enter the filter oil cup 44, and is divided into two paths after passing through the filter oil cup 44, wherein one path flows out from the oil outlet 2, and the other path passes through the manual stop valve 43 and the one-way valve 49 and is connected with the heat pipe heat exchanger 6 through the oil drainage port 3.

The bidirectional oil pump 48 converts the flow direction of fuel oil by changing the steering direction of an oil pump motor, can take oil and also can collect oil, and what needs to be explained is that: when the bidirectional oil pump 48 is operated, the electric valve 47 must be synchronously operated, and no matter how the motor of the bidirectional oil pump 48 is turned, as long as the motor of the oil pump is started, the electric valve 47 is synchronously closed, and after the motor of the oil pump is stopped, the electric valve 47 can be returned (opened) along with the motor.

When the two-way oil pump 48 works in reverse (oil recovery), the air release valve 22 can be synchronously opened, the air release valve 22 is opened to enable the pressure in the oil path to be the same as the external pressure, and the fuel oil close to the two-way oil pump 48 flows back into the oil tank 11 through the oil inlet pipe 8, so that the aims of emptying the fuel oil in the fuel oil supply channel and recovering the fuel oil into the oil tank 11 as soon as possible can be achieved; after the reverse oil collection is finished, the air release valve 22 is closed immediately and cooperatively operates in a step-by-step manner.

The release valve 22 is operated to open only when the bidirectional oil pump 48 is in a reverse oil receiving state, and is matched with the oil pump to smoothly receive oil and evacuate the fuel in the oil supply passage as soon as possible, and the release valve does not respond in other states.

In the oil receiving process, the air release valve 22 is opened, the residual fuel oil in the fuel injection pump 53 is converged with the oil drainage pipe 10 through the diesel engine oil return pipe 52 and flows into the oil cabin 63 of the heat pipe heat exchanger 6 together, in the vehicle running process, a certain amount of heat is carried at the exhaust pipe 51, the heat at the exhaust pipe 51 is brought into the oil cabin 63 by the heat pipe 66 to heat the fuel oil in the oil cabin 63, the temperature sensor 62 in the oil cabin 63 monitors the temperature of the fuel oil in real time, the heated fuel oil enters the oil tank 11 through the oil tank oil return pipe 67, the heat is brought to the fuel oil in the oil tank 11 while the fuel oil in an oil supply pipeline is emptied, and the occurrence of fuel oil wax deposition blockage is effectively prevented.

Example 2

As shown in fig. 4 and 5:

the difference between this embodiment and embodiment 1 lies in that the method for emptying fuel is different, and the air escape valve 22 is not needed in this embodiment, but an air passage interface 7 is additionally arranged on the pump valve assembly body 4, and the air passage interface 7 is connected with the vehicle-mounted air pump.

In the pump valve assembly 4, a branch is connected to the oil path where the electric valve 47 is located, the port of the branch is the air channel interface 7, an airflow blocking valve 71 is connected in series to the branch, the electric valve 47 must be closed when the airflow blocking valve 71 is opened, and the electric valve 47 synchronously returns when the airflow blocking valve 71 is closed, so that the fuel left in the filter oil cup 44 is emptied as much as possible, and the blocking fault of the oil supply channel is avoided.

The using process of the embodiment is as follows: the vehicle-mounted air pump injects high-pressure gas into the pump valve assembly body 4 through the air passage interface 7, the air flow blocking valve 71 is opened, the electric valve 47 is closed, the bidirectional oil pump 48 works reversely, along with the injection of the high-pressure gas, fuel close to the bidirectional oil pump 48 flows back to the oil tank 11 through the oil inlet pipe 8, fuel in the filter oil cup 44 is divided into two paths, one path flows out from the oil drainage port 3, and the other path flows out from the oil outlet 2.

The fuel oil flowing out from the oil outlet 2 reaches the fuel injection pump 53 through the diesel filter 21 and the diesel oil inlet pipe 23, flows out from the oil drain port 3 at the three-way interface through the diesel oil return pipe 52 with the residual fuel oil in the fuel injection pump 53, merges with the fuel oil flowing out from the oil drain port, enters the oil cabin 63 of the heat pipe heat exchanger 6, is heated, returns to the oil tank 11 through the oil tank oil return pipe 67, and brings heat to the fuel oil in the oil tank 11.

Example 3

As shown in fig. 7:

the present embodiment is different from embodiment 1 in that the heat pipe heat exchanger 6 in embodiment 1 is disposed perpendicular to the exhaust pipe 51, and if there is not enough space for installing the heat pipe heat exchanger 6, the heat pipe heat exchanger 6 can only be disposed on the side, and the present embodiment is described after disposing the heat pipe heat exchanger 6 on the side.

The side surface of the exhaust pipe 51 is opened, a connecting pipe is arranged, a flange 64 is arranged above the connecting pipe, and the heat pipe heat exchanger 6 is connected through the flange 64, wherein the heat pipe heat exchanger 6 in the embodiment is the same as that in the embodiment 1, and a plurality of descriptions are not provided here.

Except that the heat pipe 66 in this embodiment is bent when extending into the exhaust pipe 51, and forms an included angle with the vertical direction, and the heat pipe 66 is also provided with fins 65 for improving the heat absorption and heat dissipation efficiency.

When the gas carrying heat in the exhaust pipe 51 flows through the heat pipe 66, the fins 65 in the exhaust pipe 51 absorb the heat and transfer the heat to the heat pipe 66, the heat pipe 66 transfers the heat upwards, and then the heat is transferred to the fins 65 in the oil tank 63, and the heat is transferred to the fuel oil in the oil tank 63.

The pump valve combination scheme has the advantages that the structure is compact, the practicability is high, the cost can be effectively controlled, the equipment volume is reduced, the equipment weight is reduced, the magnetic field interference is effectively shielded, the layout among all parts is simplified, the number of cables is reduced, the possibility of fuel oil leakage is reduced, the reliable working performance of a product is improved, and the convenience in operation is improved; the problem that the fuel oil is not preheated before the cold vehicle is started is solved, and the problem that the fuel oil is not deposited and blocked because no fuel oil exists in the oil supply channel in the stopped state; the PTC electric heating assembly is preset in the vehicle oil tank, heating is started only in a controlled mode before the vehicle is started, the electric energy utilization rate is effectively increased due to the fact that the scheme of heating inside the oil tank is adopted, and wax-deposited fuel oil in the oil tank does not flow, so that the heat insulation effect is well kept. Part of the wax-precipitation diesel oil is heated and melted into flowable liquid, and the flowable liquid is forcibly injected into an oil supply system through a bidirectional oil pump, so that the heat generated by an engine after a vehicle is started can continuously heat the fuel oil to promote the fuel oil in an oil tank to be completely melted; after the vehicle stops running, before the fuel is not condensed by cooling, the fuel is returned to the fuel tank through the bidirectional oil pump or blown back to the fuel tank by the vehicle-mounted air pump, so that the blocking factor of a fuel supply channel is thoroughly solved; the side heat pipe heat exchanger can effectively reduce the installation height, increase the installation positions capable of accommodating space, select the installation positions more flexibly and avoid interference among other parts around the exhaust pipe skillfully.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.