JPS5828489B2 - oil burning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an oil combustion machine, such as a forced exhaust hot air heater, which blows high-temperature air into atomized petroleum to gasify it and then burns it.

Conventionally, this type of oil-burning machine, as shown in Fig. 4, drips oil onto a rotor blade 13, uses centrifugal force to apply oil particles to a heating element 14 provided in a cylindrical shape around the rotor blade 13, and then vaporizes the oil particles. ,
Air was blown by the fan motor 2 into the combustion chamber 7, where it was ignited and combusted.

However, this heating element 14 has a slow rise time after energization until it reaches a high temperature (approximately 200° C.) necessary for vaporization, and requires a waiting time of several minutes before vaporization.

Therefore, complicated time sequence control was required from the start of operation to energization of the heating element 14 and fan motor 2, oil dripping, and ignition.

In addition, if a high-wattage heating element is used to speed up this rise time, it will overheat when stable, which is dangerous.
Again, complex control was required.

In the case of heaters, etc., the tubes have various drawbacks, which is a practical problem in that it takes a long time to reach steady combustion after operation.

In the present invention, high-temperature air heated by a PTC heater 3 whose temperature rises quickly is fed into atomized oil to gasify it, and then
It has a structure that not only burns the air but also gives the combustion heat of the combustion chamber to the combustion air, solving the drawbacks of the conventional one, and
It can provide economical products that save electricity.

An example of this will be described below.

In FIG. 1, a combustion machine 1 includes a fan motor 2 for blowing air, a porous PTC heater 3 made of barium titanate (BaTi03) semiconductor ceramic, an oil atomizer 4, and a porous partition wall 5 for smooth combustion. 6, an igniter 8 using a discharge or red-hot heating element, and a heat exchanger 9.

The atomizer 4 supplies a high frequency power source 12 to an ultrasonic vibrator 11 that is in contact with a certain amount of oil 10, so that the oil is atomized (cavitation) using ultrasonic energy (cavitation).
atomization) is performed.

Reference numeral 15 denotes a first air passage provided on the outer periphery of the combustion chamber 7, and a second air passage 16 connected to the oil atomizer 4 is further provided at the downstream end of this air passage. The downstream end of this second air passage 16 faces the upstream side of the combustion chamber 7.

In addition, fan motor 2, PTC heater 3, high frequency power supply 12
, the igniter 8 is supplied with power through a starting switch.

Further, the PTC heater 3 has a porous shape as shown in FIG. 2, and its resistance-temperature characteristic has a steep resistance rise and high resistance above the rise start temperature T1 as shown in FIG.

In the above configuration, when power is supplied to each part with the start switch, the PTC heater 3 has a small resistance value at low temperatures due to the characteristics shown in Figure 3, so a large current flows and the PTC heater 3 automatically reaches the temperature T1 necessary for vaporizing oil particles in a few seconds. Heat.

When the temperature is higher than T1, its resistance value increases to suppress the amount of heat generated, and when the fan motor 2 cools the temperature, the current increases and the temperature T is constantly maintained.

Then, the fan motor 2 starts blowing air to the atomizer 4 at PT
It is heated by the heat generated by the C heater 3, but when the combustion chamber 7 and heat exchanger 9 become hot after combustion, part of the combustion heat enters the PTC heater 3.The air in the first air passage 15 is heated by the oil from the atomizer 4. Since the temperature has risen to a level that gasifies the particulates, the resistance value of the PTC heater 3 increases and its energization is stopped.

Therefore, even without any control circuit, the PTC heater 3 is de-energized after combustion, and the combustion heat gasifies the oil particles, resulting in power savings.

As explained above, the present invention applies PTC to finely divided petroleum.
The first is configured to send high-temperature air heated by the heater 3, gasify it, and then combust it, and further sends combustion air.
The air passage is provided around the outer periphery of the combustion chamber so that the air passing through it receives heat from combustion and is heated, so combustion efficiency is high, and the rise in temperature of the PTC heater 3 and the atomization of oil can be achieved in just a few seconds. Since it is fast, complicated time sequence control after operation is not required, making it economical.

In addition, since combustion occurs immediately after operation, it is extremely convenient from a practical standpoint.In addition, an oil atomizer is installed in the middle of the second air path connected to the first air path, and the oil particles generated therein are Since oil is gasified using heated combustion air and forcibly supplied to the combustion chamber, the gasified oil is stably sent from the oil atomizer to the combustion chamber, resulting in stable combustion. This has the effect that a supply path for gasified oil can be obtained with a simple configuration.

Therefore, it is possible to obtain an economical, highly efficient, and safe oil combustion machine with a simple configuration that does not require complicated control.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an oil combustion machine showing an embodiment of the present invention;
FIG. 2 is a perspective sectional view showing one embodiment of the PTC heater 3;
Figure 3 is a resistance temperature characteristic curve diagram of the PTC heater, Figure 4
The figure is a configuration diagram of a conventional combustor. The same reference numerals in the figures indicate the same or corresponding parts, and 1 is a combustion machine;
2 is a fan motor, 3 is a PTC heater, 4 is an oil atomizer, 7 is a combustion chamber, 8 is an igniter, 9 is a heat exchanger, 15 is a first
16 is a second air path.

Claims (1)

[Claims] 1. A combustion chamber into which combustion air is forcibly introduced by a fan motor, a first air passage provided on the outer periphery of this combustion chamber and into which a part of the combustion air from the fan motor is introduced; A second air path is formed in series from the downstream side of the first air path, and the downstream end is connected to the upstream side of the combustion chamber, and is provided in the middle of this second air path to atomize oil using ultrasonic waves. An oil atomizer, which is installed in a second air path upstream of the atomizer, and further heats the combustion air that is introduced into the first air path by the fan motor and heated by the outer wall of the combustion chamber to a high temperature. 1. An oil-burning machine comprising: a heater comprising a positive temperature coefficient thermistor and maintained at a predetermined temperature by self-heating.