JPH0614719U - Evaporative combustion device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable efficient cleaning of the carburetor, and to smoothly feed the fuel to the carburetor during fuel supply to ensure stable combustion. [Structure] A reserve tank 11 is provided in a fuel supply passage 4 between a fuel supply pump 3 and a carburetor 2, and an opening / closing valve 12 is provided in a fuel return passage 10 from the reserve tank 11 so as to open / close the valve 12 when extinguishing a fire. Is opened and the fuel in the reserve tank 11 is returned to the main fuel reservoir 1 by gravity, and the carburetor 2 is cleaned by the air drawn from the carburetor 2 into the reserve tank 11, and the vaporization from the reserve tank 11 is performed. A vaporization type combustion device in which a fuel supply path 4b to the container 2 is connected to the upper surface 11a of the reserve tank 11 so that fuel can be stably supplied without causing air accumulation during combustion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vaporization type combustion device capable of cleaning the inside of a vaporizer when extinguishing a fire or in a timely manner.

[0002]

[Prior art]

 As a vaporization type combustion device capable of cleaning the inside of the vaporizer, the one shown in FIG. 5 is known. In FIG. 5, 1 is a main fuel reservoir that stores liquid fuel, 2 is a vaporizer that vaporizes liquid fuel, and 3 is an electromagnetic pump that supplies fuel from the main fuel reservoir 1 to the vaporizer 2. A pump 4, a fuel supply pipe 5, and a burner 5 for burning vaporized fuel are respectively shown. The vaporizer 2 vaporizes the liquid fuel using the heater 6 and supplies the vaporized fuel from the nozzle 7 to the burner 5. Reference numeral 8 is a thermistor for detecting the temperature of the vaporizer 2. Reference numeral 9 is a return pump composed of an electromagnetic pump, 10 is a fuel return pipe, and the fuel return pipe 10 connects between the fuel supply pipe 4 and the main fuel reservoir 1 on the downstream side of the fuel supply pump 3. In this vaporization type combustion device, the return pump 9 is operated at the time of extinguishing the fire, and the gas remaining in the vaporizer 2 is returned to the main fuel reservoir 1 for cleaning.

However, in the above vaporization type combustion device, there is a problem that a power facility dedicated to cleaning is required and its control becomes complicated.

In order to deal with this problem, although the application is still unpublished, the applicant of the present invention previously installed a reserve tank in the fuel supply path between the fuel supply pump and the carburetor, A vaporization type combustion device has been proposed in which the bottom of the reserve tank is connected to the main fuel reservoir by a fuel return path. In this device, by opening the fuel return passage, the fuel in the reserve tank is returned to the main fuel reservoir by gravity, and along with that, the carburetor can be cleaned by drawing air from the carburetor. Therefore, the power equipment for cleaning as shown in FIG. 5 becomes unnecessary.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned device proposed by the applicant of the present invention, the fuel supply path from the reserve tank to the carburetor was not specified at the connection point to the reserve tank. However, there was a problem that air could be accumulated in the reserve tank and the fuel sent from the fuel supply pump could not be stably sent to the carburetor during fuel supply.

The present invention relates to an improvement of the device previously proposed by the present applicant, which enables efficient cleaning of a carburetor without adding power equipment for carburetor cleaning. The purpose is to smoothly send the fuel to the carburetor during fuel supply so that stable combustion can be secured.

[0007]

[Means for Solving the Problems]

 The vaporization type combustion device of the present invention which meets this purpose feeds the liquid fuel in the main fuel reservoir to the vaporizer by the fuel supply pump, and feeds the fuel vaporized by the vaporizer to the burner through the nozzle. In a vaporization type combustion device that uses a burner for combustion, a reserve tank that holds the fuel is installed in the fuel supply path between the fuel supply pump and the carburetor, the bottom of which is set higher than the oil level of the main fuel reservoir. The bottom of the reserve tank and the main fuel reservoir are connected by a fuel return passage, an opening / closing valve is provided in the fuel return passage, and a fuel supply passage from the reserve tank to the carburetor is provided. It consists of one connected to the top of the tank.

The connection point of the fuel supply path from the fuel supply pump to the reserve tank to the reserve tank is not particularly limited and may be any place.

[0009]

[Action]

 In such a vaporization type combustion device, the bottom level of the reserve tank is set higher than the oil level of the main fuel reservoir, so when the fire is extinguished, the fuel supply pump should be stopped and the on-off valve should be opened. , The liquid fuel in the reserve tank is returned to the main fuel reservoir due to its gravity. Along with this, air is sucked from the nozzle of the carburetor, and the residual gas in the carburetor is drawn into the reserve tank together with the air and collected. The carburetor is cleaned primarily by this air entrainment.

In the device of the present invention, the fuel supply path from the reserve tank to the carburetor is connected to the upper surface of the reserve tank, that is, it is connected to the uppermost part of the reserve tank. When fuel is sent from the fuel supply pump to the reserve tank, the air in the reserve tank is pushed out upward, and is smoothly pushed out to the carburetor side from the fuel supply passage located at the uppermost position. Therefore, air does not accumulate in the reserve tank, and during combustion that continuously supplies fuel, fuel is stabilized at a specified supply rate from the fuel supply pump to the reserve tank and from the reserve tank to the carburetor. Sent.

[0011]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a vaporization type combustion apparatus according to an embodiment of the present invention. In the figure, portions substantially equivalent to those shown in FIG. 5 are designated by the same reference numerals as those in FIG.

The main fuel reservoir 1 is a constant oil level gauge in which the oil level A is constantly adjusted. A reserve tank 11 for temporarily holding the supplied fuel is provided in the fuel supply path 4 (fuel supply pipe) from the fuel supply pump 3 to the carburetor 2. To the reserve tank 11, a fuel supply pipe 4a on the fuel supply pump 3 side is connected, and a fuel supply pipe 4b on the carburetor 2 side is connected. The fuel supply pipe 4 b on the carburetor 2 side, that is, the fuel supply pipe 4 b from the reserve tank 11 to the carburetor 2 is connected to the upper surface 11 a of the reserve tank 11.

The reserve tank 11 is further connected to the bottom of the reserve fuel tank 11 (fuel return passage) and the main fuel reservoir 1. The mutual positional relationship is such that the level of the bottom of the reserve tank 11 is set higher than the oil level A of the main fuel reservoir 1. Further, the fuel return pipe 10 is provided with an opening / closing valve 12 which is an electromagnetic valve for turning on / off the flow of fuel by opening / closing the pipe line.

Reference numeral 13 denotes a control device. The temperature signal of the carburetor 2 is sent from the thermistor 8 to the control device 13, and the control device 13 causes the heater 6 of the carburetor 2 to pass through a driving device 14. The heating, opening / closing and driving of the on-off valve 12 and the fuel supply pump 3 are controlled.

In the present invention, it is essential to connect the fuel supply pipe 4b on the carburetor 2 side to the upper surface 11a of the reserve tank 11, but the reserve tank 11 of the fuel supply pipe 4a on the fuel supply pump 3 side is required. There is no particular limitation on the connection point to. For example, as shown in FIG. 2, both the fuel supply pipe 4b on the carburetor 2 side and the fuel supply pipe 4a on the fuel supply pump 3 side may be connected to the upper surface 11a of the reserve tank 11, and as shown in FIG. The fuel supply pipe 4a on the fuel supply pump 3 side may be connected to the lower surface 11b of the reserve tank 11. Further, as shown in FIG. 4, the fuel supply pipe 4a on the fuel supply pump 3 side may be connected to the side surface 11c of the reserve tank 11.

In the embodiment apparatus configured as described above, the fuel supply pump 3 is turned off and the on-off valve 12 is opened when the fuel is exhausted. The fuel in the reserve tank 11 falls into the main fuel reservoir 1 due to gravity, and the residual gas in the carburetor 2 and the air from the outside are drawn in with it, and the carburetor 2 is cleaned. Therefore, the carburetor 2 is cleaned without any special power equipment.

When the combustion device is operating, the fuel supply pump 3 is turned on and the on-off valve 12 is closed. At this time, the fuel fed from the fuel supply pump 3 is temporarily stored in the reserve tank 11, the reserve tank 11 is filled with the fuel, and then sent to the carburetor 2, and the vaporized fuel is used for combustion. It

In this fuel supply, when the fuel is stored in the reserve tank 11, the air in the reserve tank 11 is pushed out sequentially from the lower side to the upper side, and the carburetor is supplied through the fuel supply pipe 4b. Being kicked out to the second side. In this air purging process, since the fuel supply pipe 4b is connected to the upper surface 11a of the reserve tank 11, air is not accumulated in the reserve tank 11, and the air in the reserve tank 11 smoothly flows into the fuel supply pipe 4b. Will be kicked out of.

Therefore, at the time of combustion, fuel is supplied to the carburetor 2 without air accumulation in the reserve tank 11, that is, with the interior of the reserve tank 11 being completely filled with fuel, so that there is no pulsation or the like. Fuel is stably supplied to the carburetor 2 at a predetermined fuel supply rate. Therefore, a very stable combustion state can be obtained.

[0020]

[Effect of device]

 As described above, when using the vaporization type combustion device of the present invention, it is possible to clean the vaporizer without adding special power equipment at the time of fire extinguishment, etc., and at the time of combustion, the air in the reserve tank can be cleaned. Fuel can be smoothly supplied to the carburetor without accumulation, and a stable combustion state can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a vaporization type combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing an example of a method of connecting a pipe to a reserve tank of the apparatus of FIG.

FIG. 3 is a schematic configuration diagram showing another example of a method of connecting a pipe to a reserve tank of the apparatus of FIG.

FIG. 4 is a schematic configuration diagram showing still another example of a method for connecting a pipe to a reserve tank of the apparatus of FIG.

FIG. 5 is a schematic configuration diagram of a conventional vaporization combustion device.

[Explanation of symbols]

 1 Main Fuel Reservoir 2 Vaporizer 3 Fuel Supply Pump 4 Fuel Supply Channel (Fuel Supply Pipe) 4a Fuel Supply Pump Side Fuel Supply Pipe 4b Vaporizer Side Fuel Supply Pipe 5 Burner 6 Heater 7 Nozzle 10 Fuel Return Channel ( Fuel return pipe) 11 Reserve tank 11a Upper surface of reserve tank 12 Open / close valve 13 Control device 14 Drive device

Front page continuation (72) Creator Yasushi Saito 20 Kotobukicho, Isesaki City, Gunma Sanden Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. Evaporative combustion in which liquid fuel in a main fuel reservoir is fed to a vaporizer by a fuel supply pump, and fuel vaporized by the vaporizer is fed to a burner through a nozzle and burned in the burner. In the device, in the fuel supply path between the fuel supply pump and the carburetor, the bottom is set higher than the oil level of the main fuel reservoir, the reserve tank for holding the fuel is interposed,
The bottom of the reserve tank and the main fuel reservoir are connected by a fuel return passage, an opening / closing valve is provided in the fuel return passage, and a fuel supply passage from the reserve tank to the carburetor is provided,
A vaporization type combustion device characterized by being connected to the upper surface of a reserve tank.