JPS6246124A - Liquid fuel combustion device - Google Patents

Abstract

PURPOSE:To shorten a preheating time of a vaporizer and improve operability by installing a switch for turning on or off a vaporizer thermal insulation means which thermally insulates the vaporizer at the lower temp. than that in operation during the operation stop time, and also a heater insulation means. CONSTITUTION:A heater thermal insulation circuit 14 is specially installed between a central control circuit 2 and a heater control circuit 3 and when a power source switch 1 is OFF and a thermal insulation switch 15 is ON, the central control circuit 2 activates the heater control circuit 3 through a heater thermal insulation circuit 14 and the heater control circuit 3 transmits current to a heater 4 in order to keep temp. of the heater 4 at a lower temp. than that during the operation time. Thereby, after the power source switch 1 is turned OFF and the burning operation is stopped, the thermal insulation circuit is operated to keep temp. of the vaporizer higher than room temp. and therefore, a preheating time required to reach such temp. as to permit burning to start can be shortened.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to the combustion of i-metal fuel used for heating, etc.
Regarding the location, use the α-fuel as an electric heater.
This invention relates to an oil combustor that gasifies the oil using a built-in vaporizer, ignites it, and combusts it.

[Prior technology] There are two methods of burning liquid fuel such as kerosene for purposes such as heating: There are two methods of burning liquid fuel such as kerosene, which are sucked up with a wick and burned directly, and atomized fuel that is sprayed at high pressure from a nozzle (direct combustion). There are methods that ignite, and methods that gasify a liquid at high temperatures and burn it, etc. Among them, gasification combustion methods use fuel oil, which has fine particles and reacts with the combustion air due to the high temperature. Blue flame combustion that is close to complete combustion can be easily obtained.

However, one of the drawbacks of the gasification combustion method is that it requires preheating time. Gasification combustion requires maintaining the vaporizer at a high temperature and injecting or spraying fuel into the vaporizer to heat and vaporize it. During combustion, the heat of combustion is used to heat the vaporizer and the fuel is Although vaporization is a possible method, it is necessary to use electric heat to raise the temperature of the vaporizer to the fuel vaporization temperature until combustion starts, and it takes a short time after power is turned on to the electric heater attached to the vaporizer. The user had to wait for 10 seconds or as long as 3 to 11 minutes to preheat the vaporizer.

[Problems to be Solved] In view of the above-mentioned circumstances, the present invention aims to shorten the preheating time of the vaporizer and provide a combustion device with improved usability.

[Means for solving the problem] In order to achieve the above object, the liquid fuel combustion device of the present invention heats the built-in vaporizer with an electric heater to reach a predetermined temperature, and injects fuel into the vaporizer. The device is equipped with a vaporizer heat-retaining means for keeping the vaporizer at a lower temperature when the device is not in operation than when the device is in operation. Further, the operation of the vaporizer heat-retaining means can be stopped by providing a switch for controlling the operation of the vaporizer heat-retaining means or by providing a timer means for operating the vaporizer heat-retaining means for a predetermined period of time.

[Embodiment] An embodiment of the liquid fuel combustion apparatus of the present invention is shown in FIG. 1. Although the Bunsen vaporization combustion method is adopted in the embodiment, the combustion method is not limited to this.

When the power switch (1) is turned on, the central control circuit (2)
sends a signal to the heater control circuit (3), which receives this signal and sends a current to the electric heater (4) to raise the temperature of the heater. Vaporizer (5
) absorbs heat from the electric heater (4) and rises in temperature, but the temperature of the vaporizer (5) is constantly detected by the temperature sensor (6) attached to the vaporizer 1fit (5) and centrally controlled. Sending information to circuit (2) and vaporizer <5)
When ζ reaches a temperature sufficient for fuel vaporization, the central control circuit (
2) is a pump (7), a solenoid (8), two spark plugs (
9) issues a command for driving. Upon receiving this command, the pump (7) sucks liquid fuel from the oil tank (10) and sends it to the vaporizer (5).

The solenoid (8) attracts the needle valve (11) to the right in the drawing to open the nozzle (12) of the vaporizer (5). In addition, the spark plug (9) also receives a command and the burner (13)
A high-pressure discharge is generated between the nozzle (12) and the burner (13) to ignite the vaporized gas.

In order to further shorten the preheating time by using this vaporizer (5), it is sufficient if the temperature of the vaporizer is higher than normal temperature (room temperature) at the start of preheating.

In the combustion apparatus of this embodiment, the heater heat insulation circuit (14) is connected between the central control circuit (2) and the heater control circuit (3).
) is provided separately, and the power switch (1) is turned off.
If the status ゛C heat retention switch (15) is ON,
The central control circuit (2) acts on the heater control circuit (3) via the heater heat retention circuit (14), and the heater control circuit (3) maintains the temperature of the heater (4) at a lower temperature than during operation. Send current to the heater (4). The method of controlling the current to maintain the temperature lower than that during operation is not particularly limited to this, but may be such that the temperature of the vaporizer (5) is detected by a temperature sensor (6) and maintained at a predetermined temperature. There are methods such as turning on and off the power to the electric heater (4), and constantly supplying a predetermined amount of power.

In the latter case, it is not possible to keep the temperature of the vaporizer (5) constant because it is affected by the outside temperature, but it is possible to keep the vaporizer (5) at a higher temperature than room temperature and take the preheating time longer than starting from room temperature. It is sufficient to serve the purpose of shortening.

The heat retention switch (15) is mounted at an easily accessible location on the combustion device exterior. Electric heater keeping warm (4)
Although the power consumption is small compared to the power consumption required to maintain the vaporizer (5) at the vaporization temperature during combustion, it is not economical to maintain the temperature for a long period of time, such as at night. This is not preferable due to the fact that the heat retention switch (15) can be turned on or off at the discretion of the user.

Note that when the power switch (1) is turned on, the heater heat retention circuit (14) is turned on regardless of whether the heat retention switch (15) is on or off.
) is canceled and normal heater temperature control is performed.

Another embodiment of the liquid fuel combustion device of the present invention is shown in FIG. 2. The combustion device portion is the same as that in FIG. A device (16) is provided. Power switch (
1) is turned off to stop operation, the timer device (
1G) receives this and sends a signal for a specified period of time to the central control circuit (2), and as in the previous example, after keeping the temperature of the vaporizer (5) lower than during operation, the function of the heat retention circuit is released. It works as it should.

[Effects of the Invention] As explained above, the combustion device of the present invention has a power switch (
1) is turned off and combustion stops, the heat retention circuit works to maintain the temperature of the vaporizer (5) at a temperature higher than room temperature, so in order to start operation again, the power switch (
1) can be shortened until the vaporizer (5) reaches a temperature at which combustion can be started after the vaporizer (5) is turned on, thereby reducing the user's annoyance in waiting for ignition.

Also, if the combustion equipment is not operating for a long period of time, is there a switch to disable the heat retention circuit?
Alternatively, there is a timer device that stops the operation of this heat retention circuit after a certain period of time after the power is restored.Therefore, there is an economic loss in consuming electricity by keeping the heater energized for a long time. You can also suppress it as much as possible.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of a liquid fuel combustion device and its control means according to the present invention. FIG. 2 is a schematic configuration diagram showing an example of another control means. 1...Power switch, 2...Central control circuit, 3...
・Heater control circuit, 4...Electric heater, 5...
Vaporizer, 14... Heater heat retention circuit, 15...
Heat retention switch, 16... timer device.

Claims (3)

[Claims] (1) A device that heats a built-in vaporizer with an electric heater to reach a predetermined temperature, and then allows fuel to flow into the vaporizer to vaporize and burn. A liquid fuel combustion device characterized by being equipped with a vaporizer heat-retaining means for keeping the temperature at a lower temperature than during operation. (2) A device that heats a built-in vaporizer with an electric heater to reach a predetermined temperature, and then allows fuel to flow into the vaporizer to vaporize and burn it, and the vaporizer is operated while the device is not operating. A liquid fuel combustion device characterized by being provided with a vaporizer heat retaining means for keeping the temperature at a lower temperature than during operation, and an operation on/off switch for the heater heat retaining means. (3) A device that heats a built-in vaporizer with an electric heater to reach a predetermined temperature, and then allows fuel to flow into the vaporizer to vaporize and burn it, and the vaporizer is operated while the device is not operating. 1. A liquid fuel combustion apparatus comprising: a vaporizer heat-retaining means for keeping the temperature at a lower temperature than during operation; and a timer means for operating the vaporizer heat-retaining means for a predetermined period of time.