JPH0640636U - Evaporative combustion device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a vaporization type combustion device in which a filter is provided as a resistor in a reserve tank, the filter resistor is prevented from being blocked and a stable vaporizer cleaning function can be exhibited for a long period of time. [Structure] A reserve tank 11 is interposed in a fuel supply passage 4 between a fuel supply pump 3 and a carburetor 2, and the reserve tank 11 and the main fuel reservoir 1 are connected by a fuel return passage 10. A vaporization type combustion device in which a filter resistor 15 is provided in the device, and the filter resistor 15 is made of a water-repellent fiber.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vaporization-type combustion apparatus that enables cleaning of the inside of a vaporizer during fire extinguishing or at appropriate times, and that can provide a stable fuel vaporization system.

[0002]

[Prior art]

 Although the application is still unpublished, the applicant temporarily holds the fuel in the fuel supply pipe 23 between the fuel supply pump 21 and the carburetor 22 as shown in FIG. 3 by the applicant. A vaporization-type combustion apparatus has been proposed in which a reserve tank 24 is interposed and the bottom of the reserve tank 24 is connected to a main fuel reservoir 26 by a fuel return pipe 25.

In this device, the fuel in the reserve tank 24 is gravitationally or spontaneously dropped into the main fuel reservoir 26 by opening the opening / closing valve 27 which is an electromagnetic valve provided in the fuel return pipe 25 when the fire is extinguished. Since the air is drawn back from the carburetor 22 and the residual gas in the carburetor 22 is sucked and cleaned along with this, it is possible to efficiently clean the carburetor 22 without the need for power equipment for cleaning. .

A filter 28 having a bottomed container shape is installed in the reserve tank 24 as shown in FIG. 4, so that solid foreign matter in the fuel that falls into the main fuel reservoir 26 is removed. By capturing it, it is possible to prevent clogging of the on-off valve 27 composed of a solenoid valve, and at the same time, the filter 28 is used as a resistor against a fuel flow (fuel drop) to keep the fuel drop time relatively long and vaporize. It was designed to be able to enhance the cleaning effect of the vessel.

[0005]

[Problems to be solved by the device]

 In the device proposed above, the filter 28 is composed of filter paper, and the filter paper filter 28 functions as a resistor. However, since the filter paper is usually made of a hydrophilic material, if water is mixed in the fuel, the water will be dammed up before the filter and agglomerated, or it will be trapped in the filter. Since the layer was easily formed and could not easily pass through the filter, there was a possibility that the filter was clogged.

The present invention relates to an improvement of the device previously proposed by the applicant of the present invention, in which a reserve tank is provided so that the carburetor can be efficiently cleaned, and a filter as a resistor is provided in the reserve tank. It is an object of the present vaporization type combustion device to prevent clogging of the filter resistor even when water is mixed in the fuel and to achieve a stable vaporizer cleaning function for a long period of time.

[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. A burner burner is used to burn the fuel, and a reserve tank for temporarily holding the fuel is installed in the fuel supply path between the fuel supply pump and the carburetor, and the bottom of the reserve tank and the main fuel reservoir are returned to the fuel. A vaporization type combustion device in which a fuel is connected to the fuel return passage and an opening / closing valve is provided in the fuel return passage, and a filter resistor made of a water-repellent fiber is provided at a fuel outlet portion of the reserve tank to the main fuel reservoir. .

[0008]

[Action]

 In such a vaporization type combustion device, when the fuel supply pump is stopped and the opening / closing valve is opened at the time of extinguishing a fire, 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. The liquid fuel is supplied to the reserve tank when the on-off valve is closed and the fuel supply pump is operated when the liquid fuel in the reserve tank is exhausted, and the air in the reserve tank is supplied to the carburetor accordingly.

When the fuel is returned to the main fuel reservoir, the filter in the reserve tank functions as a resistor to properly lengthen the fuel drop time and increase the vaporizer cleaning effect. In the device of the present invention, since the filter resistor of the reserve tank is made of water-repellent fiber, even when water is mixed in the fuel, the water does not aggregate due to the water-repellent property of the filter. The fine water particles are kept as they are, so they pass through without any problems. Therefore, the filter is not clogged by the water layer, and a stable vaporizer cleaning effect can be obtained for a long period of time.

[0010]

【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, the main fuel reservoir 1 constitutes a constant oil level gauge in which the oil level A is constantly adjusted. 2 is a vaporizer for vaporizing liquid fuel, 3 is an electromagnetic pump and is a fuel supply pump for supplying fuel from the main fuel reservoir 1 to the vaporizer 2, 4 is a fuel supply pipe, 5 is a fuel burner for burning vaporized fuel. Shows each of them. The vaporizer 2 is heated by the heater 6 to vaporize the liquid fuel and supply 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 11 denotes a reserve tank for holding the supply fuel, to which a fuel supply pipe 4 (fuel supply passage) on the fuel supply pump 3 side is connected, and a fuel supply pipe on the carburetor 2 side is connected to the top thereof. The bottom of the reserve tank 11 is further connected to the main fuel reservoir 1 by a fuel return pipe 10 (fuel return passage). 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.

A filter 15 made of a water-repellent fiber is provided in the reserve tank 11. As shown in FIG. 2, the filter 15 is attached to the connection portion between the reserve tank 11 and the fuel return pipe 10. The water-repellent fiber of the filter 15 is made of, for example, hollow fiber or glass fiber.

In the embodiment apparatus configured as described above, the fuel supply pump 3 is turned on and the on-off valve 12 is closed when the combustion apparatus is operating. The fuel supplied from the fuel supply pump 3 is once stored in the reserve tank 11 and then sent to the carburetor 2, where the evaporated fuel is used for combustion.

When extinguishing the fire, the fuel supply pump 3 is turned off and the on-off valve 12 is opened. The fuel in the reserve tank 11 falls into the main fuel reservoir 1 by gravity, and the residual gas in the carburetor 2 and the air from the outside air are drawn in with it, and the carburetor 2 is cleaned. Therefore, the vaporizer 2 is cleaned without any special power equipment.

Since the filter resistor 15 is provided on the outlet side of the reserve tank 11 to the main fuel reservoir 1, when the fuel drops from the reserve tank 11 to the main fuel reservoir 1. Therefore, the fuel always passes through the filter 15, and at this time, resistance is imparted to the falling fuel. By imparting this resistance, the falling time of the fuel is set to a relatively long desired time, and the cleaning effect of the carburetor is increased correspondingly.

Since the filter resistor 15 is made of water-repellent fiber, there is no possibility of forming a water layer and clogging the filter unlike a conventional filter paper filter. Even if water is mixed in the fuel, the water is allowed to pass through in the form of fine particles and the filter 15 is not blocked.

[0017]

[Effect of device]

 As described above, in the vaporization type combustion device of the present invention, since the filter resistor provided in the reserve tank is made of water-repellent fiber, the filter resistor antibody keeps the fuel dropping time from the reserve tank long. Also, it is possible to prevent the filter from being blocked by moisture. Since the filter resistor is not blocked, its resistance function can be stably exhibited for a long period of time. Therefore, it is possible to realize a stable system in which the fuel return time does not change.

[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.

2 is an enlarged cross-sectional view of a reserve tank of the apparatus shown in FIG.

FIG. 3 is a schematic configuration diagram of a vaporization type combustion device previously proposed by the present applicant.

4 is a perspective view of a filter provided in a reserve tank of the apparatus shown in FIG.

[Explanation of symbols]

 1 Main Fuel Reservoir 2 Vaporizer 3 Fuel Supply Pump 4 Fuel Supply Channel (Fuel Supply Pipe) 5 Burner 7 Nozzle 10 Fuel Return Channel (Fuel Return Pipe) 11 Reserve Tank 12 Open / Close Valve 15 Filter Resistor Made of Water-Repellent Fiber

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

Claims (3)

[Scope of utility model registration request] 1. A liquid fuel in a main fuel reservoir is fed to a carburetor by a fuel supply pump, and the fuel vaporized by the carburetor is fed to a burner through a nozzle and burned by the burner. In the fuel supply path between the supply pump and the carburetor, a reserve tank for temporarily holding the fuel is interposed,
In a vaporization type combustion apparatus in which the bottom of the reserve tank and the main fuel reservoir are connected by a fuel return passage, and an opening / closing valve is provided in the fuel return passage, the fuel outlet of the reserve tank to the main fuel reservoir is repelled. A vaporization type combustion device characterized in that a filter resistor made of an aqueous fiber is provided. 2. The vaporization type combustion device according to claim 1, wherein the water-repellent fiber is a hollow fiber. 3. The vaporization type combustion device according to claim 1, wherein the water-repellent fiber is made of glass fiber.