JPH0264310A - Liquid fuel combustion device - Google Patents

Abstract

PURPOSE:To prevent odor of liquid fuel from flowing out of an air hole generated by an increased room temperature and reduce a length of arranging fuel pipe to improve an outer appearance of a liquid fuel combustion device by a method wherein a solenoid valve is opened only when liquid fuel is sucked up with another solenoid valve opened or closed in synchronous with an operation of a sucking pump. CONSTITUTION:As an amount of liquid fuel within an auxiliary tank 5 is less than a required amount, a surface level sensor 7 may detect it to operate a sucking pump 12 to cause liquid fuel within a fuel tank 4 to pass through a fuel pipe 6 and then sucked into the auxiliary tank 5. In simultaneous with this operation, a solenoid valve 13 is opened, so that replacing air is taken into a fuel tank 4. As liquid fuel within the auxiliary tank 5 is more than a required amount, the surface level sensor 7 may detect it, the sucking pump 12 is stopped, and in simultaneous with this operation, the solenoid valve 13 is closed so as to prevent an occurrence of bad odor from the fuel tank 4. Since the liquid fuel is sucked up by the sucking pump 12, it is possible to reduce an arranging of the fuel pipe 6 so as to improve an outer appearance. A flowing means may be provided with a differential pressure valve opened or closed in response to a pressure difference across the fuel tank.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a liquid fuel combustion device that gasifies and burns liquid fuel.

(Prior Art) Conventionally, hot-air heaters that perform heating by circulating hot air indoors have been well-received as clean and comfortable combustion devices. This type of hot air heater takes in air for combustion from outside using a fan and releases it outside. On the other hand, indoor air can be heated without polluting the indoor air because combustion heat is extracted through a heat exchanger. For this reason, when installed at -degrees, it is often left as it is even when the season changes, causing inconveniences such as making the living space feel small. To address this issue, we developed a wall-mounted hot air heater for people who are deaf and hard of hearing, and space-saving devices have started to be seen, especially devices that use gas fuel.

Combustion devices such as hot air heaters that use liquid fuel are often left running due to their low fuel consumption and comfort, and a large-capacity separate tank is often used as a fuel supply method. many. In addition, in order to achieve the aforementioned thin design, an auxiliary tank is installed inside the combustion equipment main body, the fuel tank is placed in the combustion equipment main body, this fuel tank (separate tank) and the auxiliary tank are connected with a fuel pipe, and a pump pump is used to connect the auxiliary tank to the combustion equipment main body. A separate tank is required because the liquid fuel in the fuel tank (separate tank) is sent to the auxiliary tank for combustion.

However, in high-rise houses and densely populated areas, there is no place or supply means to install a separate tank outdoors, and small-sized separate tanks are installed indoors.

The small separate tank mentioned above is a fuel tank (separate tank).
After the fuel has been sent out, the air holes for air to flow in are in an open state. In this case, as the room temperature rose, the odor of liquid fuel (kerosene) leaked out of the air vents, creating a foul odor (kerosene) in the room where a clean warm air heater was used. In addition, fuel is often taken out from the bottom of the fuel tank using a fuel pipe, which results in poor aesthetics when placed indoors due to the route of the fuel pipe.

(Problem to be Solved by the Invention) As described above, in a conventional combustion device equipped with a fuel tank outside the main body, when the room temperature rises, liquid fuel is discharged from the air hole provided in one fuel tank. The odor of kerosene leaked out, creating a foul odor in the room where a clean warm air heater was used. In addition, the fuel pipes had to be routed, and if the interior was left in place, the aesthetics would be poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid fuel combustion device that can prevent the generation of bad odor (kerosene) and does not impair the aesthetic appearance even when installed indoors.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the liquid fuel combustion device of the present invention includes a liquid fuel combustion device main body, a separate fuel tank for storing fuel outside the combustion device main body, and a separate fuel tank for storing fuel outside the combustion device main body. A pump pump that supplies fuel from a separate fuel tank to the combustion device, and an inflow means that sends replacement air to the separate fuel tank are provided.

It is preferable that the inflow means uses an electromagnetic valve that opens and closes in conjunction with the driving of the pump, or installs a differential pressure valve that opens and closes based on the pressure difference between the inside and outside of the separately placed fuel tank.

(Function) In this single configuration, the solenoid valve opens and closes in conjunction with the drive of the pump, and by opening the solenoid valve only when the pump pumps liquid fuel, it is possible to It is possible to prevent the odor of liquid fuel from flowing out from the air holes. Furthermore, if a differential pressure valve that opens and closes based on the pressure difference between the inside and outside of the fuel tank is installed, it is also possible to prevent the odor of liquid fuel from flowing out from the air port. Furthermore, since the liquid fuel is pumped up using a pump, the number of fuel pipes can be reduced and the appearance can be improved.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of a combustion apparatus using a fuel tank according to an embodiment of the present invention. In the figure, a combustion device main body 1 is fixed to the surface of a wall surface 2 via a metal fitting 3. This combustion device main body 1j is provided with an auxiliary tank 5 for storing liquid fuel in the combustion device main body 1 from a fuel tank (separate tank) 4 in the combustion device main body 1. is connected to the auxiliary tank 5.

In the longitudinal direction of the auxiliary tank 5, W and I water level detectors 7 and a second water level detector 8 are installed. The liquid fuel in the auxiliary tank 5 is sent from the main fuel pump 9 to a vaporizer 10 (ζ), which gasifies the liquid fuel and sends it to a liquid fuel combustor (burner). ing.

The fuel tank 4ζζ is equipped with a pump pump 12 for supplying liquid fuel from the fuel tank 4 to an auxiliary tank 5 in the combustion device main body 1, and a solenoid valve 13 as an inflow means for sending replacement air. .

The pump control circuit unit is configured to control the pump pump 12 and the electromagnetic valve 13 based on information from the first water level detector 7 and the second water level detector 8 in the auxiliary tank 5 described above.

Next, the pump control circuit and the hearing pump will be explained. FIG. 2 is a schematic diagram showing the configuration of a control circuit section 114 of a liquid fuel combustor fit according to an embodiment of the present invention.

In FIG. 1, the auxiliary tank 51 of the fuel supply section is the first
A first water level detector 7 that is energized when the water level is below a set water level and cut off when it is above a second set water level, and a second water level detector that is powered off when it exceeds a third set water level and does not automatically return. 8
are arranged at both ends of the auxiliary tank 5 in the longitudinal direction. In addition, the auxiliary tank 5 is equipped with a pump 1 for pumping the fuel tank 4.
A main fuel pump 9 is installed which sends the liquid fuel supplied from 3 to the carburetor IO.

The pumping pump control circuit section includes the pumping pump 1.
2, a contact point 7 of the first water level detector, and a contact point 18 of the second water level detector. The contacts 18 of the device are connected in series with the power source 161.

The contact 17 of the first water level detector is normally cut off and does not drive the pump 12.

The contact point 18 of the second water level detector is normally configured to be energized, and the solenoid valve 13 is configured to open and close in conjunction with the drive of the pump 12. That is, when the pump 12 is not operating, the solenoid valve 13 is closed so that replacement air does not enter the fuel tank 4ζ, and the pump 12 is not operated.
2, the pump control circuit 1 is opened so that the solenoid valve 13 is opened so that replacement air enters the fuel tank 4.
It is wired to 4.

Next, the operation according to an embodiment of the present invention in the above configuration will be described. When the auxiliary tank 5 of this combustion device contains more than the required amount of liquid fuel (contains more than the first set water level), a switch (not shown) is turned on to use this combustion device.
When the fuel pump 9 is turned on, the main fuel pump 9 is activated and the liquid fuel in the auxiliary tank 5 is sent to the vaporizer 101. The vaporizer 10 gasifies the liquid fuel and converts it into vaporized fuel, which is then used as a liquid fuel combustor (burner).
11, and mixes with air in this liquid fuel combustor section to create an air-fuel mixture. This air-fuel mixture is ignited by an ignition device (not shown) downstream of the liquid fuel combustor section to form a flame (-secondary flame). Then, this secondary flame is mixed with secondary air and combusted at the most downstream side of the liquid fuel combustor section.

The heat generated by this combustion is exchanged with a heat exchanger (not shown) and hot air is supplied indoors by a fan or the like.

As the above-described combustion operation is performed, the liquid fuel in the auxiliary tank 5 decreases because the liquid fuel is used for combustion, and the liquid fuel in the auxiliary tank 5 becomes less than the required amount (first set water level). At this time, the first water level detector 7 detects that the water level is lower than the first set water level, and energizes the contact 17 of the first water level detector in the pump control circuit section to supply current from the power source 16 to the pump pump. 121 and operates the pump 12 to pump the liquid fuel in the fuel tank 4 outside the combustion device main body 1 to the auxiliary tank 5 through the fuel vibro. In addition, since the solenoid valve 13 opens at the same time as the pump 12 operates, replacement air can be taken into the fuel tank 4, which prevents the pressure inside the fuel tank 4 from decreasing, thereby reducing the ability to pump liquid fuel. This allows liquid fuel to be pumped up smoothly.

The liquid fuel in the fuel tank 4 is supplied into the auxiliary tank 5 from the pump 121, and when the liquid fuel increases and the liquid fuel in the auxiliary tank 5 exceeds the required amount (second set water level), the first water level is detected. It is detected that the water level in the pump 7 is higher than the set water level, the contact 17 of the first water level detector of the pump control circuit section -U- is cut off, and the pump 12 is stopped. At the same time as this pump 12 is stopped, the solenoid valve 1
3 is closed, the foul odor of fuel from the fuel tank 4 (
(kerosene odor) can be prevented. In addition, pumping pump 1
2, since liquid fuel is pumped up, the amount of routing of the fuel vibro can be reduced and the appearance can be improved. Also,
Even if the fuel in the fuel tank 4 shakes when the fuel tank 4 is moved, the solenoid valve 13 is normally closed, so the fuel can be prevented from blowing out of the fuel tank 4.

In addition, since the pump 12 is installed on the fuel tank 4 side, even if air gets mixed into the fuel vibro, this air can easily escape from the fuel vibro, so the fuel can be supplied to the auxiliary tank 5 of the combustion device main body l. can be carried out smoothly.

Next, other embodiments of the present invention will be described. FIG. 3 is a schematic diagram of a fuel tank according to another embodiment of the present invention.

In the figure, the fuel tank 4 is equipped with a pump pump 12 for supplying liquid fuel from the fuel tank 4 to an auxiliary tank 5 in the combustion device main body 1, and an air port 20 as an inflow means for sending replacement air. ing. A deodorizing filter 21 made of a deodorizing agent such as activated carbon or zeolite is installed in the air port 20 with a filter cap 22 .

With this configuration, the deodorizing filter 21 deodorizes the foul odor of fuel (kerosene) from the fuel tank 4, thereby preventing the occurrence of the foul odor of fuel (kerosene) from the fuel tank 4.

FIGS. 4(a) and 4(b) are schematic diagrams of an air port of a fuel tank according to another embodiment of the present invention. In the figure, a differential pressure valve 25 made of resin, a plate spring, or the like is installed at the air port 20 of the fuel tank 4 as an inflow means for introducing replacement air into the fuel tank 4, which opens and closes based on the pressure difference between the inside and outside of the fuel tank. That is, as can be seen from the sectional view showing the operating state of the air port of the fuel tank of another embodiment Z of the present invention shown in FIGS. 5(a) and 5(b), the refueling operation (operation of the pump pump 12) The pressure inside the fuel tank 4 decreases in conjunction with this.

In this case, the pressure inside the fuel tank 4 becomes lower than the atmospheric pressure outside the fuel tank 4, and the air outside the fuel tank 4 pushes down the differential pressure valve 25 through the air port 20 and flows into the fuel tank 4. , - Once the air has flowed in, the valve 25 is connected to the fuel tank 4.
Since the fuel tank 4 does not move from the inside to the outside, the air inside the fuel tank 4 does not flow back to the outside of the fuel tank 4. Therefore,
It is possible to prevent the occurrence of a bad odor of fuel (kerosene) from the fuel tank 4. Further, even if the fuel in the fuel tank 4 shakes when the fuel tank 4 is moved, the action of the differential pressure valve 25 can prevent the fuel from blowing out of the fuel tank 4.

〔Effect of the invention〕

According to the present invention, by using a solenoid valve that opens and closes in synchronization with a pump, the solenoid valve is opened only when the pump pumps liquid fuel. It is possible to prevent odor from flowing out.Also, if the inflow means is an air port and a filter made of deodorizer is installed, or if a differential pressure valve that opens and closes based on the pressure difference between the inside and outside of the fuel tank is installed, liquid fuel from the air port can be prevented. In addition, since the liquid fuel is pumped up using a pump, the number of fuel pipes can be reduced and the appearance can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a combustion device using a fuel tank according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing the configuration of a control circuit section of a liquid fuel combustion device according to an embodiment of the present invention. , FIG. 3 is a schematic diagram of a fuel tank according to another embodiment of the present invention,
FIGS. 4(a) and 4(b) are schematic diagrams of an air port of a fuel tank according to another embodiment of the present invention, and FIGS. 5(a) and (b)
) is a sectional view showing an operating state of an air port of a fuel tank according to another embodiment of the present invention. 1...Combustion device main body 4...Fuel tank 5...Auxiliary tank 6...Fuel pipe 7...No.! Water level detector 8...Second water level detector 9...Main fuel pump
10... vaporizer 12... pumping pump 13...
Solenoid valve 14... Control circuit section 15... Fuel supply section 20... Air port 21... Deodorizing filter 2
2...Filter cap 25...Differential pressure valve agent
Patent Attorney Nori Kei Yudo Hiroyuki Uji Diagram Diagram

Claims (3)

[Claims] (1) A liquid fuel combustion device main body, a separately placed fuel tank that stores fuel outside the combustion device main body, a pump that supplies fuel from this separate fuel tank to the combustion device, and the separately placed fuel A liquid fuel combustion device characterized by comprising: an inlet means for sending replacement air into a tank. (2) The liquid fuel combustion apparatus according to claim 1, wherein the inflow means is a solenoid valve that opens and closes in conjunction with the driving of the pump. (3) The liquid fuel combustion apparatus according to claim 1, wherein the inflow means is a differential pressure valve that opens and closes based on a pressure difference between the inside and outside of the separately placed fuel tank.