JPS5843645B2 - Kikasouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vaporizer using a positive temperature coefficient thermistor.

Conventionally, as a vaporizer, a liquid such as petroleum or other fuel to be vaporized is supplied to a rotating plate that is rotationally driven by a motor, the fuel is scattered outward by the centrifugal force of the rotating plate, and the scattered fuel is preliminarily heated. There is a known device in which the fuel is vaporized by colliding with an outer circumferential wall that has been preheated to the vaporization temperature of the fuel.

However, with such a device, it takes a relatively long time to preheat the outer peripheral wall to the fuel vaporization temperature of 1, and if the preheating time is to be shortened, a large amount of electric power must be used for preheating. .

Moreover, if the outer peripheral wall is kept at a temperature higher than the vaporization temperature of the fuel, there is a risk that tar will precipitate, so it is necessary to maintain the outer peripheral wall at approximately the vaporization temperature. There was a problem in that a separate controller had to be used.

This invention was devised to solve these problems. It can perform preheating in an extremely short time, reduces the amount of power consumed for preheating, and does not require a temperature controller. The purpose of this invention is to provide a vaporization device that does not

An embodiment of the present invention will be described below with reference to the drawings.

A motor 2 is placed in the center of a base 1, and a disk-shaped self-heating rotating plate 4 is pivotally attached to the tip of a rotating shaft 3 of the motor 2.

The rotary plate 4 has a disk-shaped positive temperature coefficient thermistor 60 on the upper surface of a heat-resistant insulator 5, such as porcelain, at the center thereof, and a fuel vaporizer 9 with ring-shaped electrode plates 7 and 8 attached to the upper and lower edges of the periphery, respectively. The vaporized body 9 is buried so that the upper surface thereof is exposed, and the tip of the rotary shaft 3 is attached to the lower end of the insulator 5 formed in a cylindrical shape.

A pair of slip rings 10.1 are provided at the lower end of the insulator 5.
1 are fitted to each other at a predetermined interval, and brushes 12 and 13 are brought into sliding contact with each of the slip rings 10 and 11, respectively, and the electrode plates 7 and 8 are respectively connected via lead wires.

The motor 2 and each brush 12, 13 are connected to a power source (not shown).

A fan 14 is installed approximately at the center of the rotating shaft 3 of the motor 2.

The rotary plate 4 button and the fan 14 are housed in a bowl-shaped case 17 which has an intake port 15 at the center of its bottom and is mounted on the base 1 by means of mounting legs 16 provided at the bottom.

Liquid fuel such as petroleum is then passed through the oil amount regulator 18, the solenoid valve 19 button, and the side surface of the case 17 from a fuel tank (not shown) provided externally, and the opening thereof is connected to the rotating plate. The oil is supplied to the rotary plate 4 through an oil supply pipe 20 located close to and above the substantially central portion of the rotary plate 4.

As the fan 14 rotates, air is sucked in through the intake port 15 and blown to a combustion section (not shown) provided above the case 17, as shown by the arrow in the figure.

With this configuration, the resistance value of the PTC thermistor 6 is extremely small when the temperature is low, and when the temperature is relatively high, the resistance value increases exponentially as the temperature rises, so the PTC thermistor 6 generates heat. When used as a body, the temperature of the PTC thermistor 6 rises rapidly when electricity starts, and then when the temperature reaches such a temperature that the resistance value increases exponentially, the heat generation is weakened and the temperature is automatically controlled.

Therefore, as a liquid fuel, the vaporization temperature is 200℃~2
In addition to using 50°C kerosene, we used a positive characteristic resistor that increases the negative resistance value when the temperature exceeds 200°C, as shown in Figure 2, and when the power is turned on, it rotates due to the operation of motor 2. Dish 4 and fan 14 rotate.

As the fan 14 rotates, air is sucked in from the intake port 15 as shown by the arrow in the figure.

At the same time, the PTC thermistor is energized via the brushes 12, 13, slip rings 10, 11 buttons, and electrode plates 7, 8, and the PTC thermistor self-heats and starts preheating.

At this time, since the resistance value of the positive characteristic resistor is small, the current flowing through it is large and its temperature rises rapidly.

Then, when the temperature of the fuel vapor 9 reaches approximately 200 to 250°C, the positive temperature coefficient thermistor rapidly increases its resistance value and weakens the heat generation.

Therefore, the temperature of the fuel vapor 9 is maintained at approximately 200 to 250°C by the heat generated by the positive temperature coefficient thermistor.

In this state, when the button is pressed and the oil amount regulator 18 is adjusted and the solenoid valve 19 is opened, the oil is supplied to the rotary plate 4 via the oil supply pipe 20.
An appropriate amount of kerosene is dripped onto the surface of the fuel vapor 90.

The dropped kerosene becomes a thin film due to the centrifugal force of the rotary plate 4 and spreads outward from the surface of the fuel vapor 90.

Thus, the kerosene is efficiently vaporized by the temperature of the fuel vaporizer 9 and mixed with air in the case 17 to become a mixed vaporized gas.

This mixed vaporized gas is then combusted in the combustion section.

In this way, since the rotary plate 4 itself generates heat and uses a positive temperature coefficient thermistor for heat generation, preheating can be performed in an extremely short time, and the power consumed for preheating can be extremely reduced. Moreover, no special temperature controller is required to maintain the temperature of the rotary plate 4 at a predetermined temperature, and the configuration can be simplified.

In addition, since the temperature of the rotating plate 4 can always be maintained at the vaporization temperature of kerosene, there is no possibility that the rotating plate 4 will be overheated and tar will be deposited on the vaporizing surface.

In the above embodiment, as a positive temperature coefficient thermistor, the temperature is 2.
Although we used a material whose resistance value increases sharply toward 00°C or higher, it is not necessarily limited to this.
In short, it is sufficient to use a positive temperature coefficient thermistor whose resistance value increases exponentially in accordance with the vaporization temperature of the liquid to be vaporized.

Next, other embodiments of the invention will be described with reference to the drawings.

E. Components that are the same as those in the above embodiment are given the same reference numerals and detailed explanations will be omitted.

As shown in FIG.
is provided on the side of the case 17 so that the entire device is tilted laterally, and a concave shape is formed on the surface of the rotating plate 210 so that the liquid can efficiently spread over the surface of the rotating plate 210. It is effective.

As described in detail above, the present invention is equipped with a self-photothermal rotating plate made of a positive temperature coefficient thermistor and a liquid supply means for supplying an appropriate amount of liquid to be vaporized to the rotating plate. To provide a vaporizer which can perform preheating in a short time, reduce power consumption for preheating, do not particularly require a temperature controller, and has a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a temperature-resistance characteristic diagram of a positive temperature coefficient thermistor according to the same embodiment, and FIG. 3 is a sectional view showing another embodiment of the invention. It is a diagram. 4... Self-light heating type rotary plate, 6... Positive characteristic servo star, 9... Fuel vaporizer, 20... Oil supply pipe.

Claims (1)

[Claims] 1. A vaporizer comprising a self-photothermal rotating plate made of a positive temperature coefficient thermistor, and a liquid supply means for supplying an appropriate amount of liquid to be vaporized to the rotating plate.