CN206647199U - A kind of heat pipe fuel oil assisted heating device - Google Patents

Abstract

The utility model relates to the thermal management of automobiles. The utility model designs a heat pipe fuel auxiliary heating device, which aims to improve the preheating speed and efficiency of the auxiliary heater for the driver's cabin, and improve the engine cold start performance and the driver's cabin. comfort. This utility model utilizes the superconducting heat performance of the heat pipe, combines the heat pipe and the fuel heater to preheat the cockpit, and retains the preheating method for the engine coolant water heating. When the system is installed, the heat release end of the heat pipe is installed at a higher position relative to the heating chamber. After the heat pipe coolant condenses, it flows back to the heating chamber by gravity. Compared with the traditional cabin preheating method, it does not need a water pump to drive, reducing the The power consumption of the water pump is greatly improved, and the warm-up speed and warm-up efficiency are greatly improved.

Description

A heat pipe fuel auxiliary heating device

technical field

The utility model relates to the field of automobile heat management, in particular to a heat pipe fuel auxiliary heating device.

Background technique

When the engine starts cold, because the temperature of the coolant and lubricant does not reach the normal level, the atomization of the fuel is poor, and the mixture is formed very unevenly, resulting in serious incomplete combustion of the fuel during the cold start process, and the emission of a large amount of unburned CO and HC. In addition, because the temperature of the lubricant is too low, the lubricating oil may be in a state of condensation and precipitation, the components are poorly lubricated, and the friction is large, which will lead to increased mechanical loss of the engine and increased wear of the components, and the power economy and even the life of the engine will be greatly reduced. small. In addition, people put forward higher requirements for the comfort of the car cockpit, especially in the northern winter, the cockpit is too low, which seriously affects the comfort of the cockpit. Therefore, in the cold winter, the rapid warm-up of the engine and cab becomes more and more important.

At present, the preheating methods of the engine and the cockpit mainly include electric heaters and fuel heaters. Preheating with an electric heater consumes a large amount of electric energy of the battery, which will seriously reduce the power supply life of the battery in some hybrid vehicles. The fuel auxiliary heater is used, and its working method is to preheat the coolant first, and then transport the coolant to the engine and the cabin through the pipeline. It has a low preheating efficiency for the car cabin, and driving the coolant through the cabin radiator will also A part of the pump power is lost.

Contents of the invention

The utility model provides a heat pipe fuel auxiliary heating device. Experiments have proved that the thermal conductivity of the heat pipe is 1500 times that of copper. Using the superconductivity of the heat pipe and the characteristics of the cooling liquid at the exothermic end of the heat pipe to reflux the condensate by gravity, a new type of auxiliary heater device is proposed. Improve the speed and efficiency of warming up the engine and cabin, and reduce the power consumption of the coolant-driven pump, which improves the utilization of resources.

The utility model relates to a heat pipe fuel auxiliary heating device, and the engine preheating adopts a water heating method. Utilizing the superconductivity of the heat pipe, the heat pipe and the fuel heater are combined to preheat the cockpit through the heat pipe. Install the heat release end of the heat pipe at a higher position relative to the evaporation chamber to facilitate the return flow of the heat pipe coolant.

In order to achieve the above object, the utility model is realized through the following technical solutions, and the accompanying drawings illustrate:

A heat pipe fuel auxiliary heating device, the device is mainly composed of an air inlet 1, an oil delivery pipe 2, an oil inlet pipe 3, a combustion fan 4, an exhaust port 5, a coolant inlet 6, a heat exchanger 7, a heat pipe coolant return port 8, Heat pipe coolant evaporation chamber 9, cooling fins 10, heat pipe heat release end 11, heat pipe insulation section 12, heat conduction partition 13, coolant outlet 14, insulation valve 15, spark plug 16, atomizer 17, combustion-supporting fan 18, motor 19. Composition of oil pump 20, protective cover 21, heat pipe coolant steam inlet 22, heat insulating protective layer 23, combustion chamber 24, and heat exchange fins 25. In the heat pipe fuel auxiliary heating device, the coolant inlet 6 and the coolant outlet 14 are connected to the small engine cycle, and the coolant flows into the heat exchanger from the coolant inlet 6 for heating, and then flows out through the coolant outlet 14, and flows through the heat-insulating pipe. Into the engine, the engine is preheated, the heat pipe coolant absorbs heat and evaporates in the evaporation chamber 9, and flows into the heat release end 11 of the heat pipe through the heat pipe insulation breaker 12. The heat release end of the heat pipe should be installed in the cockpit, and a heater The wind fan brings the heat in the heat pipe into the cockpit, and makes the heat pipe coolant steam condense and return.

In the heat pipe fuel auxiliary heating device, ethanol is selected as the coolant in the heat pipe coolant evaporation chamber 9, and the heat pipe is evacuated to increase the heat release coefficient of the heat pipe.

The heat pipe fuel auxiliary heating device described above ensures the thermal insulation performance of the heat pipe, and the heat pipe coolant evaporation chamber 9 and the heat pipe heat release end 11 located in the cockpit should be connected through a heat insulating pipe 12 .

In the heat pipe fuel auxiliary heating device described above, in order to improve the condensation effect of the heat pipe, heat dissipation fins 10 are added to the heat release end of the heat pipe, and a warm air fan should be installed to speed up the heat dissipation and condensation of the heat pipe coolant.

In the heat pipe fuel auxiliary heating device described above, in order to ensure the good heat preservation performance of the heater, the engine coolant delivery pipe should have good heat insulation performance, and the walls of the engine coolant heat exchange chamber 7 and the heat pipe evaporation chamber 9 are provided with a heat insulation protection layer 23 , to prevent heat loss.

In the aforementioned heat pipe fuel auxiliary heating device, the valve 15 must be an adiabatic valve. When only the cockpit needs to be preheated, the adiabatic valve 15 is closed and the heat pipe works alone. The heat insulation valve 15 has good heat preservation performance.

In the heat pipe fuel auxiliary heating device described above, in order to ensure good preheating of the heat pipe coolant, the heat conduction separator 13 should have good heat conduction performance and be spherical in shape to increase the preheating area.

In the heat pipe fuel auxiliary heating device, the heat pipe coolant return port 8 should be arranged below the heat pipe coolant preheating chamber 9 as much as possible to ensure that the heat pipe coolant can submerge the return port 8 and prevent the heat pipe coolant vapor from flowing backward through the return port. to the cooling end of the heat pipe.

In the heat pipe fuel auxiliary heating device, in order to ensure good preheating of the engine coolant, heat exchange fins 25 are provided on the outer wall of the combustion chamber to enhance the heat exchange of the engine coolant in the heat exchange jacket.

The heat pipe fuel auxiliary heating device described above, when installed, the heat pipe heat release end 11 should be installed at a higher position relative to the heat pipe coolant evaporation chamber 9, and the heat pipe heat release ends should be arranged up and down in an S shape, so as to facilitate the cooling of the heat pipe The agent flows back by gravity.

In the heat pipe fuel auxiliary heating device, the working principle of the heating device at the lower part of the combustion chamber is basically similar to that of the traditional fuel heater. The air inlet 1 communicates with the combustion-supporting fan 4 to provide fresh air for combustion. The fuel pump 20 sucks and pressurizes the fuel from the fuel inlet pipe 3, and delivers it to the atomizer 17 through the fuel delivery pipe 2 for atomization. The spark plug 19 ignites the air-fuel mixture and burns it in the combustion chamber 24. The combustion exhaust gas passes through the exhaust pipe 5 discharge.

Description of drawings

Figure 1 is a structural diagram of the heat pipe fuel auxiliary heater.

Fig. 2 is a partially enlarged view of the heat pipe coolant evaporation chamber.

FIG. 3 is a top view of FIG. 2 .

Figure 4 shows the specific control method of the heat pipe fuel auxiliary heater.

1—air inlet 2—oil delivery pipe 3—oil inlet pipe 4—combustion fan 5—exhaust port 6—coolant inlet 7—heat exchanger 8—heat pipe coolant return port 9—heat pipe coolant evaporation chamber 10—radiating fins 11—Heat pipe heat release end 12—Heat pipe insulation section 13—Heat conduction partition 14—Coolant outlet 15—Adiabatic valve 16—Spark plug 17—Atomizer 18—Combustion fan 19—Motor 20—Oil pump 21—Protective sleeve 22—Heat pipe Coolant steam inlet 23—heat insulation protection layer 24—combustion chamber 25—heat exchange fin 26—radiator 27—engine 28—thermostat 29—three-way valve 30—heat pipe fuel auxiliary heater 31—heating fan 32— Heat pipe heat release end 33—cockpit 34—engine coolant water pump

detailed description

As shown in Figure 1, it is a schematic diagram of the structure of the auxiliary heater. The device consists of an air inlet 1, an oil delivery pipe 2, an oil inlet pipe 3, a combustion fan 4, an exhaust port 5, a coolant inlet 6, and a heat exchanger (water jacket) 7 , heat pipe coolant evaporation chamber 9, cooling fins 10, heat pipe heat release end 11, heat pipe insulation section 12, coolant outlet 14, insulation valve 15, spark plug 16, atomizer 17, combustion-supporting fan 18, motor 19, oil pump 20 , a protective cover 21, a heat pipe coolant steam inlet 22, an insulating protective layer 23, a combustion chamber 24, and a heat exchange fin 25. Adiabatic valve 15 can control whether to engine preheating, when engine reaches normal temperature, close adiabatic valve 15, now only has heat pipe end to radiate heat, and cockpit is preheated. The temperature adjustment of the cockpit can be controlled by changing the power of the oil pump or the rotation speed of the heater fan in the cockpit. When the cockpit needs a higher temperature, increase the power of the oil pump to inject more fuel into the combustion chamber and burn out More heat, more heat is brought into the exothermic end of the heat pipe. When the engine temperature is too high, the auxiliary heater is turned off, and the engine coolant is used to heat the cockpit, so that the energy of the engine can be used reasonably and the utilization rate of energy can be improved. The exothermic end of the heat pipe should be installed at a higher position relative to the evaporation chamber to ensure that the coolant of the heat pipe condenses and flows back to the evaporation chamber by gravity. , increase heat dissipation and condensation at the cooling end of the heat pipe, and bring the heat from the cooling end of the heat pipe into the cockpit.

As shown in Figure 2, it is a partially enlarged view of the heat pipe coolant heat exchange chamber. The thermally conductive partition 13 has good thermal conductivity, and the thermally conductive partition is made into a spherical surface to increase the preheating area of the heat pipe coolant evaporation chamber 9 . The heat pipe coolant return port 8 should be installed at the lower end of the evaporation chamber to ensure that the liquid surface of the heat pipe coolant submerges the return port to prevent the heat pipe coolant vapor from flowing backwards. Insulation performance to prevent heat loss, the coolant heat exchange chamber should be processed with fins 25 to increase heat exchange efficiency.

The auxiliary heating device can not only be applied to traditional automobile engines, but also can be applied to hybrid electric automobiles. As shown in Figure 4, it is a specific control strategy of the heat pipe fuel auxiliary heater on a hybrid vehicle. Connect the coolant outlet and inlet of the heat pipe fuel auxiliary heater in series to the small engine cycle, and install the heat release end of the heat pipe in the cockpit. Mode 1, when the outdoor temperature is too low, both the engine 27 and the cabin 33 need to be preheated. At this time, the thermostat 28 opens the small circulation channel of the engine, and the three-way valve 29 opens the channel of the engine 27 and the fuel auxiliary heater 30 of the heat pipe , the heat pipe fuel auxiliary heater works, the engine coolant is heated by the heat pipe fuel auxiliary heater, and the engine is preheated under the driving action of the water pump 34, and the heat pipe transmits heat to the cab to work to preheat the cab. Mode 2, as the temperature of the engine continues to rise after starting, when the engine temperature is overheated, the engine needs to be cooled, and the waste heat of the engine can be used to heat the cockpit. At this time, the auxiliary heater does not work, and the three-way valve connects the engine and the driver The cabin passage is opened, and driven by the water pump, the engine coolant preheats the cockpit. Mode 3, when the engine is overheated but the cockpit does not need to be heated, the thermostat will open the large cycle of the engine, and the engine coolant will enter the radiator to dissipate heat. Mode 4, under the motor drive mode, the engine does not work, and when the cockpit needs to be heated, the three-way valve is closed at this time, and only the heat pipe end 32 of the heat pipe fuel heater works to supply heat to the cockpit.

Claims (4)

1. A kind of 1. heat pipe fuel oil assisted heating device, it is characterised in that it include air inlet (1), petroleum pipeline (2), oil inlet pipe (3), Combustion-supporting fan (4), exhaust outlet (5), coolant inlet (6), hot traffic control device (7), heat pipe cooling agent refluxing opening (8), heat pipe cooling Agent vaporization chamber (9), radiating fin (10), heat pipe release end of heat (11), heat pipe insulation section (12), heat conduction baffle (13), coolant go out Mouth (14), heat insulation valve (15), spark plug (16), atomizer (17), combustion-supporting fan (18), motor (19), oil pump (20), protective case (21), heat pipe cooling agent steam inlet (22), adiabatic overcoat (23), combustion chamber (24), heat exchange fin (25) composition.
2. 2. a kind of heat pipe fuel oil assisted heating device according to claim 1, it is characterised in that it combines fuel Heating Device and heat pipe, the preheating method to crew department is changed, heated by fuel heater opposite heat tube, then by heat pipe to driving cabin Room preheat, and using the superior heat conductivity energy of heat pipe, greatly improves the pre- thermal efficiency of the auxiliary heater to crew department And preheating speed, improve the utilization rate of resource.
3. A kind of 3. heat pipe fuel oil assisted heating device according to claim 1, it is characterised in that by engine coolant plus Hot cell and heat pipe coolant vaporization chamber are separated with sphere heat conduction baffle.
4. 4. a kind of heat pipe fuel oil assisted heating device according to claim 1, it is characterised in that heat pipe coolant flows back Mouth is arranged on below heat pipe cooling agent vaporization chamber, cooling agent is flooded refluxing opening, prevents heat pipe coolant vapours from flowing backwards.