JPH10205714A - Vaporization type combustion appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a preheat time during ignition, to reduce the size of a vaporizer body, and to improve manufacturing properties. SOLUTION: When the size of a burner 3 is increased, only an outer periphery B of a burner placing part 4 containing a heat recovery cylinder 55 is extended without changing an outer periphery A of a rib 81. This constitution suppresses the increase of the size of the periphery of the lower part of the burner placing part 4 and reduces a material cost of the vaporizer body. Further, the heating part of the approximate linear vaporizing part of a heater 71 is caused to approach the two sides of the approximate linear vaporizing part. Thus, the width of the vaporizer body is also decreased. Further, since the heat of the heater 71 is centralized to the vaporizing part, an ignition waiting time is remarkably shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporization type combustion apparatus for burning fuel vaporized by heating.

[0002]

Generally, in this type of vaporizing combustion apparatus, a fuel such as petroleum is heated and vaporized by a vaporizer, and the vaporized gas is injected from a nozzle and mixed with air. It burns with a burner.
FIG. 6 shows a conventional example. In these figures, reference numeral 101 denotes a vaporizer main body. The vaporizer main body 101 is provided with a substantially linear vaporizer 102, and a burner 103 is mounted on one end of the vaporizer 102. Mounting part 104 as a burner receiving seat for
Is provided. A rib-shaped heat recovery cylinder 105 for recovering the combustion heat of the burner 103 to the vaporizing part 102 is formed on the outer periphery of the burner mounting part 104. 106 is a burner
Nozzle installed at almost the center of 103, 107 is the vaporizing section 10
2 and a heater for heating the burner mounting portion 104. This heater 107 is used for vaporizing fuel particularly at the time of ignition. The conventional heater 107 is generally formed in a substantially U-shape, with a bent central portion extending along the burner mounting portion 104, and linear portions on both end sides extending along both sides of the vaporizing portion 102. I have.

In use, when the entire vaporizer main body 101 is heated by the heater 107 to a predetermined temperature at which fuel evaporates with the ignition operation, combustion starts. After the start of combustion, the heat of combustion from the burner 103 is recovered by the heat recovery cylinder 105, so that even if the power supply to the heater 107 is stopped, vaporization continues and the fuel burns.

[0004] However, in the above-mentioned conventional vaporizing combustion equipment,
As shown in FIG. 5, an outer periphery A of a rib 111 formed below the burner mounting portion 104 for fixing a U-shaped heater 107, and an outer periphery B of a burner mounting portion 104 provided with a heat recovery cylinder 105. Have the same diameter. Therefore, if the burner 103 is made to be large for the purpose of increasing calories, not only the burner mounting portion 104 but also the burner
The outside diameter of the letter-shaped rib 111 and the size of the heater 107 are also increased, which is disadvantageous in terms of manufacturing cost and consumes unnecessary power.
Further, there is a problem that the ignition preheating time until the vaporizer main body 101 is heated to a predetermined temperature is also long.

The present invention is intended to solve such a problem, and aims to shorten the preheating time at the time of ignition,
It is another object of the present invention to provide a vaporization type combustion apparatus which is compact and has excellent manufacturability.

[0006]

According to the present invention, there is provided a vaporizing combustion apparatus comprising: a substantially linear vaporizing section for vaporizing fuel; a heater for heating the vaporizing section;
A nozzle provided on one end side of the vaporizing section for ejecting gas vaporized in the vaporizing section, a burner for burning gas ejected from the nozzle, and a burner receiving seat for mounting the burner; In a vaporization type combustion apparatus having a heat recovery unit for recovering heat from the burner formed on the outer periphery of a receiving seat, the heater includes a substantially U-shaped receiving seat heating unit located at a lower portion of the burner receiving seat. A substantially linear vaporizing section heating section extending from both ends of the receiving section heating section and located adjacent to both sides of the vaporizing section, and further below the burner receiving section for mounting the receiving section heating section. The outer periphery of the burner receiving seat provided with the heat recovery portion is extended more than the outer periphery of the provided rib.

[0007] According to the above configuration, when increasing the size of the burner, only the outer periphery of the burner receiving seat including the heat recovery unit is required without changing the outer periphery of the heater and the rib for mounting the heater heating unit of the heater. Expand to fit the external shape of the burner. Thereby, enlargement of the periphery of the lower part of the burner receiving seat can be suppressed. Further, even if the burner is enlarged, the lower part of the burner receiving seat has the same shape, so that it is possible to share the various components attached thereto.

In addition, the width of the vaporizer main body can be reduced because the substantially linear vaporizing section heating section of the heater is close to both sides of the substantially linear vaporizing section. For this reason, the whole shape of the carburetor body can be made compact, in combination with the fact that the periphery of the lower part of the burner seat is not enlarged. Furthermore, the heat from the receiver heating section and the vaporizing section heating section of the heater is
Since the fuel is efficiently guided to the vaporization section, the ignition waiting time until the fuel reaches the vaporization temperature is greatly reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a vaporizer body integrally formed in a substantially flat plate shape.
It comprises a substantially linear vaporizing section 2 and, at one end side of the vaporizing section 2, a burner mounting section 4 which is a burner receiving seat provided for mounting the burner 3 thereon. In order to constitute the vaporizing section 2, a substantially cylindrical vaporizing pipe storage section 5 is formed in a straight line inside the vaporizing section 2. The vaporized pipe storage section 5 is horizontal or slightly inclined in a direction of descending toward the open rear end face side, and a female screw section 6 is formed on the inner peripheral surface of the rear end portion of the vaporized pipe storage section 5. Is formed, and a stepped portion 7 is formed on the front side of the female screw portion 6. On the other hand, a return pipe 8 formed vertically through the vaporizer main body 1 at the front end of the vaporizer pipe housing 5.
A communication port 9 opening to the side is formed.

Reference numeral 11 denotes a cylindrical vaporizing pipe which is removably mounted in the vaporizing pipe housing 5. A vaporizing filter 12 is mounted inside the vaporizing pipe 11, and these vaporizing pipes 11 and vaporizing pipes are provided. The filter 12 constitutes a vaporization filter section. One end of the vaporizing pipe 11 is provided with a joint 14 to which an oil feeding pipe 13 is fixed, and when a filter nut 15 through which the oil feeding pipe 13 penetrates is screwed into the female screw portion 6 of the vaporizing pipe housing 5, packing is performed. The joint pipe 14 is pressed against the stepped portion 7 of the vaporized pipe storage section 5 via 16, and the vaporized pipe 11 is fixed to the vaporized pipe storage section 5. That is, here, the female screw portion 6 and the filter nut 15 and the like constitute fixing means of the vaporized pipe 11 to the vaporized pipe storage portion 5.

On the other hand, a connection nut 19 detachably connected to a connection port 18 of the electromagnetic pump 17 is provided at the other end of the oil supply pipe 13.
Is provided. The electromagnetic pump 17 is mounted on one side of a lid 22 constituting a fixed tank 21 serving as an oil pan, and has a connection port.
A refueling port 23 on the opposite side to 18 extends below the lid 22. By driving the electromagnetic pump 17, fuel such as oil in the fixed tank 21 is supplied to the oil supply pipe 13.
Through the evaporating section 11 and into the vaporizing pipe 11 of the vaporizing section 2.

At the upper end of the return pipe 8 of the carburetor body 1, there is formed a female screw portion 31 serving as a nozzle mounting portion communicating with the vaporizing pipe housing portion 5 through the communication port 9. The female screw portion 31 has a nozzle. 32 is detachably mounted. That is,
A male screw part 33 formed at the lower part of the nozzle 32 is screwed to the female screw part 31. A needle valve 34 is provided at the lower end of the return pipe 8.
Is connected to an electromagnetic solenoid 35 for driving the motor up and down. The needle valve 34 opens and closes the nozzle 32 and is provided in the return pipe 8. Reference numeral 36 denotes a gas return pipe hanging down from the fixed tank 21.
Connected to the bottom of the The gas return pipe 36 is for returning excess gas in the vaporizer main body 1 to the fixed tank 21. However, when the lower end 37 is immersed in the oil surface in the fixed tank 21, the gas return deteriorates. Therefore, the lower end 37 is positioned so as not to be immersed particularly in the oil level in the fixed tank 21.

Here, the configuration around the fixed tank 21 will be described in more detail. The fixed tank 21 has a bottomed cylindrical tank body 41 for storing oil as a fuel, and the tank body 41.
And a cover 22 that covers the upper opening of the evaporative combustion device, and is fixedly disposed in a casing (not shown) forming an outer shell of the vaporizing combustion device. The tank body 41 has a stepped bottom surface, and an outer peripheral portion 43 of the lid 22 is crimped and fixed to a flange portion 42 projecting outward from the upper end surface. On the other hand, the lid 22
Except for the outer peripheral portion 43, it has an entire concave shape. The flat concave portion 44 has holes 45 and 46 for inserting the oil supply port 23 and the gas return pipe 36, and a detachable cartridge tank (not shown). ) Are provided respectively. When the cartridge tank containing the fuel is inserted into the oil supply port 47, the fixed tank is
The oil level in 21 is kept at a certain height.

In the middle of the gas return pipe 36, a U-shaped bent portion 50 having a horizontal portion 49 having a predetermined size with respect to the lower end portion 37 is formed in advance. When the horizontal portion 49 located at the lowermost portion of the bent portion 50 is placed in contact with the concave portion 44 of the lid 22 located at the upper portion of the fixed tank 21, the contact surface between the horizontal portion 49 and the concave portion 44 is formed. This serves as a positioning surface of the lower end portion 37 with respect to the oil level, and the lower end portion 37 is disposed at a predetermined position in the fixed tank 21. Reference numeral 51 denotes a tank partition plate for partitioning a storage portion of the cartridge tank. A part of the tank partition plate 51 holds upper portions of both sides of the bent portion 50 of the gas return pipe 36 to fix the gas return pipe 36 to the tank. It is fixed to 21. The reason why the lid 22 is formed in a concave shape is to prevent oil spilled on the upper surface of the lid 22 from flowing out of the fixed tank 21 when the cartridge tank is attached or detached.

The configuration of the vaporizer main body 1 will be described again. The burner mounting portion 4 is formed in an annular shape with the nozzle 32 as a center, and is provided integrally above one end of the vaporizing pipe housing portion 5. A substantially cylindrical heat recovery cylinder 55 serving as a heat recovery unit located on the outer circumference of the burner 3 is formed on the outer peripheral portion of the upper surface of the burner mounting portion 4 so as to protrude. Burner mounting part 4
A fixing portion 57 having a screw hole 56 is formed so as to protrude forward, and a notch portion 58 is formed in the front portion of the heat recovery cylinder 55 in correspondence with the fixing portion 57. Have been.
In addition, a protruding hook portion is provided on the upper inner peripheral surface of the heat recovery cylinder 55.
59 is integrally formed at the rear.

Next, the configuration of the burner 3 which is detachably held on the burner mounting portion 4 will be described. Reference numeral 61 denotes a burner main body constituting the outer shell of the burner 3. The burner main body 61 is formed in a substantially cylindrical shape with an upper surface closed and a lower surface opened, and a flange portion 62 protruding to the outer peripheral side is formed at a lower end portion. A plurality of flame ports 63 are formed in the lower part of the peripheral wall of the burner main body 61. 64
Is a cylindrical throat that rises from the bottom and has an open end, and this throat 64 has a horizontal flange portion 65 whose lower end portion is fixed by being overlapped with the flange portion 62 of the burner main body 61, It rises from the flange portion 65 while reducing its diameter, and is located at a central portion in the burner main body 61. The nozzle 32 faces the center of the bottom of the throat 64. A rectifying cup 66 having an open lower surface is provided at an upper portion in the burner main body 61. This rectifier cup 66
The upper surface of the burner body 61 is welded or other means.
Is fixed to the upper surface portion. At the lower end of the rectifying cup 66, a flange portion 67 located above the flame outlet 63 is formed so as to protrude to the outer peripheral side. Proximity or contact. Reference numeral 68 denotes a flame port net, which forms a combustion flame by covering the outer peripheral side of the flame port 63.

When assembling, the burner 3 has the burner main body 61 and the flange portions 62 and 65 of the throat 64 mounted on the burner mounting portion 4 of the vaporizer main body 1. At this time, the flanges 62 and 65 are
The lower side of 59 is engaged. In addition, the flange portion 65 of the throat 64, which is located especially on the opposite side of the hook portion 59, passes through the notch portion 58 of the heat recovery cylinder 55 and overlaps the fixing portion 57 of the carburetor body 1. By screwing into the hole 56, the burner 3 is fixed to the vaporizer main body 1.

Reference numeral 71 denotes a heater such as an electrothermal sheath heater for heating the vaporizing section 2.
Is substantially U located on the outer periphery of the lower part of the burner placing part 4.
And a substantially linear evaporator heating section 73, 74 extending from both ends of the evaporator seat heater 72 and located near both sides of the vaporization pipe housing 5, respectively. As a whole, it has a front rear circular shape. Further, terminal portions 75 and 76 bent downward from the vaporizing portion heating portions 73 and 74 are formed at both ends of the heater 71, respectively. The heater 71 is fixed to a concave groove 77 having a substantially U-shaped cross section formed on the lower surface side of the vaporizer main body 1 by caulking or welding. The heating sections 73 and 74
Are fixed to overhang portions 78 and 79 which are formed to project from both sides from the vaporization pipe housing portion 5.

At the lower part of the burner mounting portion 4, a rib 81 for mounting the receiving seat heating portion 72 of the heater 71 is provided outside the concave groove portion 77. The rib 81 is formed in a U-shape along the heat recovery cylinder 55 and the receiving seat heating section 72. Further, as shown in FIG. 1, the outer periphery B of the burner mounting portion 4 provided with the heat recovery cylinder 55 is wider than the outer periphery A of the rib 81.

Next, the operation of the above configuration will be described. With the ignition operation, fuel such as oil in the fixed tank 21 starts to be pumped into the vaporization pipe 11 of the vaporization section 2 through the oil supply pipe 13 by the electromagnetic pump 17. And
At the time of ignition, the vaporizing pipe 11 is heated from the vaporizing pipe storage section 5 by the heater 71, and the fuel is vaporized in the vaporizing pipe 11 in which the vaporizing filter 12 is stored. Also,
The needle valve 34 moves upward in the non-combustion state and closes the nozzle 32, but after the ignition operation, the needle valve 34 moves downward while the fuel is vaporized in the vaporization pipe 11. The nozzle 32 is opened. Accordingly, the gas obtained by vaporizing the fuel is ejected from the nozzle 32 and mixes with the primary air for combustion in the throat 64. After the mixed gas flows out of the upper surface opening of the throat 64, it is guided to the flame outlet 63 of the burner main body 61 by the rectifying cup 66, and the burner main body 61
Spouts out of the Then, ignition is performed by a discharge plug (not shown) and combustion starts, and a combustion flame is formed on the surface of the flame port net 68 covering the flame port 63. During combustion, the heat of combustion from the burner 3 is guided to the vaporization pipe 11 by the heat recovery cylinder 55, and the heat vaporizes the fuel, so that the heater 71 is turned off.

In this embodiment, when the size of the burner 3 is increased for the purpose of increasing calories, as shown in FIG. 1, the outer periphery A of the rib 81 for mounting the receiving seat heating portion 72 of the heater 71 is not changed. Then, only the outer periphery B of the burner mounting portion 4 including the heat recovery cylinder 55 is expanded according to the outer shape of the burner 3. Thereby, it is possible to suppress an increase in the size of the vaporizer main body 1, particularly around the lower portion of the burner mounting portion 4,
The material cost of the vaporizer body 1 can be reduced. Further, even if the size of the burner 3 is increased, the lower portion of the burner placing portion 4 has the same shape, so that components such as the return pipe 8 attached thereto can be shared.

In this embodiment, as shown in FIG.
The heater 71 is formed in a front rear circular shape, and the substantially linear evaporator heating sections 73 and 74 of the heater 71 are brought into close proximity to both sides of the substantially linear evaporator pipe housing 5. Therefore, the width of the vaporizer 2 and thus the vaporizer main body 1 in the vaporizer pipe housing 5 can be reduced, and the vaporizer main body 1 can be made smaller in size, without increasing the size of the lower part of the burner receiver 4.
The whole shape of can be summarized compactly. Further, not only the vaporizing section heating sections 73 and 74 of the heater 71 but also the receiving seat heating section 72 are located in the vicinity of the vaporizing pipe housing section 5, so that the heat of the heater 71 is consequently lost. The liquid is efficiently guided to the vaporization pipe storage section 5 in a concentrated manner.
Thereby, the ignition waiting time until the fuel reaches the vaporization temperature is greatly reduced.

As described above, according to the above-described embodiment, the substantially U-shaped receiving seat heating section located below the burner mounting section 4
A heater 71 is constituted by a pair of substantially linear vaporizing section heating sections 73 and 74 which extend from both ends of the receiving section heating section 72 and are located close to both sides of the vaporizing section 2, respectively. The outer periphery B of the burner placing part 4 provided with the heat recovery cylinder 55 is extended more than the outer periphery A of the rib 81 provided at the lower part of the burner placing part 4 for mounting the heater 72, thereby making the heater
By concentrating the heat from 71 to the vaporizing section 2, the preheating time at the time of ignition can be reduced, and the overall shape of the vaporizer main body 1 can be made compact. Further, the material cost of the vaporizer main body 1 can be reduced, and various components attached to the lower part of the burner mounting portion 4 can be shared, which has a large effect on manufacturing.

By the way, in the case of a conventional vaporizing combustion device such as an oil fan heater, a gas return pipe is provided to return excess gas in the vaporizer body to the fixed tank. If the lower end is immersed in the oil level in the fixed tank, the return of gas becomes worse. For this reason, a predetermined portion of the gas return pipe is subjected to bulging to form a flange portion, and the flange portion is brought into contact with the upper surface of the fixed tank to position the gas return pipe with respect to the oil surface. I was

However, the above-mentioned bulge processing is inferior in workability in the first place, and furthermore, since the fixed tank and the flange portion do not have a fixed structure, the fixed pipe is not fixed due to deformation of the gas return pipe itself or an unexpected impact. There was a problem that the gas return pipe easily came out of the tank. In the latter case, in particular, when the gas accumulated in the combustion device from the gas return pipe touches the high-temperature portion, it also causes odor.

Therefore, in this embodiment, the gas return pipe 36
In order to improve the workability of the carburetor body 1
A U-shaped bent portion 50 is formed in the middle of the gas return pipe 36 for returning gas from the fixed tank 21 to the fixed tank 21, and the contact surface between the bottom surface of the bent portion 50 and the upper surface of the fixed tank 21 is The lower end portion 37 of the gas return pipe 36 is positioned so as to be positioned with respect to the liquid level of the fuel inside. Therefore, in this case, by simply bending the gas return pipe 36 into a U-shape, it is possible to obtain a positioning surface equivalent to that of the conventional bulging process, and it is possible to eliminate the bulging process of the conventional processing. Will be possible.

Further, in this embodiment, in order to improve the drawback that the gas return pipe 36 easily comes out of the fixed tank 21, the upper surface of the bent portion 50 is attached to the tank partition plate 51 for partitioning the storage portion of the cartridge tank. It is in contact with the pressed state. In this case, the gas return pipe 36 is
By pressing the bent portion 50 from above, the gas return pipe 36 can be reliably prevented from coming off. Further, the bent portion 50 is not only positioned at the lower end of the gas return pipe 36, but also
By using the gas return pipe 36 to prevent the gas return pipe 36 from coming off, the number of processing steps can be reduced. At the same time, since the tank partition plate 51 which originally divides the storage portion of the cartridge tank is also used to prevent the gas return pipe 36 from coming off, the number of parts does not increase and there are many advantages in production.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
The shape and configuration of the details are not limited to those of the embodiment,
Various settings are possible within the scope of the present invention.

[0029]

According to the present invention, a substantially linear vaporizing section for vaporizing a fuel, a heater for heating the vaporizing section, and a gas provided at one end of the vaporizing section and vaporized by the vaporizing section are ejected. A vaporizer comprising a nozzle, a burner for burning gas ejected from the nozzle, and a burner receiving seat for mounting the burner, and a heat recovery unit for recovering heat from the burner on an outer periphery of the burner receiving seat. In the combustor, the heater is provided with a substantially U-shaped receiving seat heating portion located at a lower portion of the burner receiving seat, and extends from both ends of the receiving seat heating portion, and is located close to both sides of the vaporizing portion. A burner comprising a substantially linear evaporator heating section, and further provided with the heat recovery section than an outer periphery of a rib provided at a lower portion of the burner receiving seat for mounting the receiver heating section. Only are those obtained by extending the outer periphery of the seat, aims to shorten the preheating time at the time of ignition can be provided an excellent evaporative burner for the production of being able to carburetor body compactly together.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a burner showing one embodiment of a vaporizing combustion device of the present invention.

FIG. 2 is a plan view of a vaporizer main body incorporating the same heater.

FIG. 3 is a cross-sectional view of the whole of the same, showing a state in which a vaporization filter is removed.

FIG. 4 is an exploded perspective view of the vaporizer and the heater.

FIG. 5 is a cross-sectional view of a burner showing an example of a conventional vaporizing combustion device.

FIG. 6 is a plan view of a vaporizer main body incorporating the same heater.

[Explanation of symbols]

 2 Vaporizing section 3 Burner 4 Burner mounting section (burner receiving section) 32 Nozzle 55 Heat recovery cylinder (heat recovery section) 71 Heater 72 Receiving section heating section 73, 74 Vaporizing section heating section 81 Rib A Outer periphery of rib B Burner receiving seat Perimeter

Claims (1)

[Claims] 1. A substantially linear vaporizer for vaporizing a fuel, a heater for heating the vaporizer, a nozzle provided at one end of the vaporizer for ejecting gas vaporized by the vaporizer, In a vaporizing combustion apparatus, a burner that burns gas ejected from a nozzle, and a burner receiving seat for mounting the burner, and a heat recovery unit that recovers heat from the burner is formed on an outer periphery of the burner receiving seat. The heater has a substantially U-shaped receiving seat heating portion located at a lower portion of the burner receiving seat, and a substantially linear heating portion extending from both ends of the receiving seat heating portion and located near both sides of the vaporizing portion. An outer periphery of the burner receiving seat provided with the heat recovery unit, more than an outer periphery of a rib provided at a lower portion of the burner receiving seat for mounting the receiving seat heating unit. An evaporative combustion device characterized by having expanded.