KR101084770B1 - Heating apparatus for gas fuel supplying system - Google Patents

Abstract

The present invention relates to a heating device for a gas fuel supply system for converting a liquid fuel supplied to an engine into a gaseous fuel, and more particularly, using a PTC element as an energy source for converting a liquid fuel into a gaseous fuel. A heating apparatus for a gas fuel supply system.

The present invention is a casing formed inlet and outlet; A plurality of electrodes extending in the casing and spaced apart in series on a path through which fuel flows, grooves for accommodating the electrodes are formed, and an end portion extends into the casing, and a groove in the body Provided is a heating device for a gas fuel supply system which is inserted and one side is provided with the electrode unit the other side is in contact with the inner surface of the groove on the body of the electrode.

Carburetor, ELP, Series, Heater Unit

Description

Heater for gas fuel supply system {HEATING APPARATUS FOR GAS FUEL SUPPLYING SYSTEM}

The present invention relates to a heating device for a gas fuel supply system for converting a liquid fuel supplied to an engine into a gaseous fuel, and more particularly, using a PTC element as an energy source for converting a liquid fuel into a gaseous fuel. A heating apparatus for a gas fuel supply system.

In general, a gas fuel supply system of an engine combusting gas fuel is provided with a heating device for converting liquid fuel into gas.

Such a heater converts the liquid fuel into a gaseous fuel by using waste heat of the cooling water discharged when the engine is cooled.

However, since the fuel is vaporized using the waste heat of the cooling water as described above, the liquid fuel cannot be vaporized smoothly in the gaseous state at the time of startup even before the temperature of the cooling water rises.

Therefore, in addition to the waste heat of the engine, a means for converting the liquid fuel into gaseous fuel in addition to the waste heat of the engine is required in preparation for the temperature of the engine coolant before the temperature rises.

In response to these demands, electrical resistance coils have been mainly used as a means of converting liquid fuel into gaseous fuel.

However, since the electric resistance coil generates heat in proportion to the electric power applied to the electric power, there is a risk of fire when overheated. Therefore, a control device for controlling the electric power applied to the electric resistance coil is required.

In order to overcome this reason, a PTC element, which is a constant temperature element that does not rise above a certain temperature even when the power of electricity applied is increased, is used in the heating apparatus.

As is widely known, a PTC element, which is a positive temperature coefficient thermistor, has a characteristic of rapidly increasing electrical resistance at a certain temperature or higher. Therefore, when a voltage is applied, a constant temperature is applied regardless of the ambient temperature. There is a magnetic temperature control function.

Recently, the field of application as a heating element using the above functions has been expanded, and it is designed to dissipate the heat generated after aggregating an appropriate number of such constant temperature heating elements to a part that requires a constant heat dissipation and rapid temperature rise. Application is possible.

A heating apparatus using a PTC element is disclosed in Japanese Patent Laid-Open No. 2005-197510, which has a support case in which a positive electrode is disposed in the center and a PTC element is supported on both sides as shown in FIG. Except for the entire outer peripheral surface, a negative electrode and a heating plate were placed in close contact with each other, and an elongated heater unit having a casing was installed in parallel in the fuel flow direction to convert the liquid fuel into a gaseous fuel.

However, the conventional heating apparatus using the same PTC element as described above, the heater unit must be installed in parallel in the flow direction of the fuel, so it must be provided in the elongated form, and accordingly accordingly fixing the heater unit firmly to the end of the elongated form. There is no choice but to install a support.

The support provided in this way has a problem that the heat transfer efficiency decreases with time since the time to delay at the inlet side where the heat exchange is not made by disturbing the flow of fuel is long.

In addition, there is a problem that a fire may occur due to spark when the support coupled to the heater unit is loose.

Accordingly, an object of the present invention is to provide a heating device for a gas fuel supply system having improved thermal efficiency because the present invention has been devised to solve the above problems and increases the residence time around the heater unit that generates heat.

In addition, an object of the present invention is to provide a heating device for a gas fuel supply system that prevents the fire caused by the support by changing the shape of the heater unit and installed in series in the heat exchange chamber so that the support is unnecessary.

The present invention and the casing formed inlet and outlet to achieve the above object; A plurality of electrodes extending in the casing and spaced apart in series on a path through which fuel flows, grooves for accommodating the electrodes are formed, and an end portion extends into the casing, and a groove in the body Provided is a heating device for a gas fuel supply system which is inserted and one side is provided with the electrode unit the other side is in contact with the inner surface of the groove on the body of the electrode.

Here, the electrode is preferably formed with an elastic projection on one side or both sides.

In addition, the body is formed on the plurality of electrodes, respectively, it is preferable that the protrusion is formed inward on the inner surface of the casing corresponding to the space side between each body.

In the heating apparatus for a gas fuel supply system according to the present invention, since the residence time around the heater unit generating heat is increased, thermal efficiency is improved.

In addition, since the present invention changes the shape of the heater unit and is installed in series in the heat exchange chamber, a support is not required, and thus a fire caused by the support can be prevented in advance.

Hereinafter, with reference to the accompanying drawings, a heating device for a gas fuel supply system according to the present invention will be described.

1 is an exploded perspective view of a heating device for a gas fuel supply system according to the present invention, Figure 2 is a perspective view showing a casing and a heater unit according to the invention, Figure 3 is a perspective view showing a body according to the invention, Figure 4 5 is a cross-sectional view of a cover having an electrode according to the present invention, FIG. 5 is a longitudinal sectional view of a heating apparatus according to the present invention, FIG. 6 is a cross sectional view of a heating apparatus according to the present invention, and FIG. It is a schematic drawing.

The heating apparatus according to the present invention includes a casing 10 through which heat exchange is performed and a heater unit 20 for supplying heat into the casing 10. Here, the heater unit 20 is installed spaced apart in series on a path through which fuel flows inside the casing 10.

The casing 10 has an inlet 12 through which liquid fuel is introduced and an outlet 14 through which gaseous fuel converted into a gaseous state is discharged. The casing 10 has a heater unit 20 installed therein to receive heat and convert the liquid fuel into a gaseous fuel. The casing 10 is more prone to heat exchange because the protrusion 16 is formed on the inner side of the casing 10 corresponding to the space side between the body 40 to be described later to form a turbulent flow.

The heater unit 20 includes a plurality of electrodes 30 spaced apart in series in the casing 10 and a groove 42 for accommodating the electrodes 30 and an end 44 of the casing 10. It includes a body 40 extending into the interior of the PTC element 50 is inserted into the groove 42 of the body 40 to generate heat.

The electrode 30 is fixedly installed on the cover 32, which is an insulator, extends into the casing 10, and is spaced in series in the longitudinal direction along a fuel flow direction. The electrode 30 is formed with an elastic protrusion 34 to be in continuous contact with the PTC device 50. The elastic protrusions 34 formed on the electrode 30 are integrally formed. An electrode terminal 36, which is a connection portion with the electrode 30, is installed at an upper end of the cover 32.

The body 40 has a groove 42 corresponding to the number of electrodes 30 in the plate 46, and the electrode 30 is inserted into the groove 42. In addition, the electrode 30 has an end portion 44 protruding into the casing 10 to dissipate heat generated from the PTC element 50 into the casing 10. Here, the insulating guide 48 is inserted into the edge portion of the PTC element 50 so as not to leak current from the electrode 30 inserted into the groove 42 and the PTC element 50 electrically connected to the electrode 30. It is preferable to install.

In addition, the end 44 of the body 40 is provided so that the flow of fuel is not disturbed in the circumferential shape. On the other hand, the body 40 has to be excellent in electrical conductivity because electricity applied from the PTC device 50 must flow, and heat conductivity is required because heat generated from the PTC device 50 must be easily transferred to the inside of the casing 10. Must be excellent In addition, the heat dissipation fin 60 is mounted on the outer circumferential surface of the body 40 to improve thermal efficiency. Therefore, since the heat transfer area is enlarged by the heat radiation fins 60, the amount of heat entering and leaving per unit time increases. In addition, an O-ring 62 is provided between the plate 46 and the casing 10 for sealing and insulation.

The PTC element 50 is inserted into the groove 42 of the body 40 by the insulating guide 48. The PTC device 50 inserted into the groove 42 of the body 40 is in close contact with the electrode 30 on one side and in contact with the inner surface of the groove 42 of the body 40 on the other side. Therefore, the electricity applied through the electrode 30 generates heat while passing through the PTC element 50 and is connected to an external electrode (not shown) along the body 40 and grounded.

Hereinafter, the operation of the heating apparatus for a gas fuel supply system according to the present invention will be described with reference to the accompanying drawings.

Electricity applied through the electrode terminal is transferred through the electrode and supplied to the PTC element. Electricity supplied to the PTC element generates the PTC element.

At this time, heat of the generated PTC element is supplied into the casing through the body. The heat supplied into the casing changes the liquid fuel introduced through the inlet into a gaseous state and is discharged through the outlet. In addition, the fuel flowing between the body is further increased heat exchange by the laminar flow is changed to turbulent flow by the protrusion formed in the casing.

On the other hand, the electricity generated by heating the PTC element is connected to the external electrode along the surface of the body and grounded.

1 is an exploded perspective view of a heating device for a gas fuel supply system according to the present invention.

2 is a perspective view showing a casing and a heater unit according to the present invention.

3 is a perspective view showing a body according to the present invention.

4 is a cross-sectional view of a cover provided with an electrode according to the present invention.

5 is a longitudinal sectional view of a heating apparatus according to the present invention.

6 is a cross-sectional view of a heating apparatus according to the present invention.

7 is a view schematically showing a heating apparatus according to the prior art.

Claims (3)

A casing formed with an inlet and an outlet; A plurality of electrodes extending in the casing and spaced apart in series on a path through which fuel flows, grooves for accommodating the electrodes are formed, and an end portion extends into the casing, and a groove in the body And a heater unit having one side inserted into the electrode and the other side having a PTC element in contact with an inner side surface of the groove of the body. The method of claim 1, The electrode is a heating device for a gaseous fuel supply system, characterized in that a protrusion having elasticity on one side or both sides. 3. The method of claim 2, The body is formed on a plurality of electrodes, the heating device for a gaseous fuel supply system, characterized in that the protrusion formed inward on the inner surface of the casing corresponding to the space side between each body.

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