JP2859121B2 - Vaporization type combustion device - Google Patents

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 used for an oil fan heater or the like.

[0002]

2. Description of the Related Art A vaporizing combustion apparatus of this type includes a blower formed in a flat shape, a tubular portion provided in a blower case of the blower, and a vaporizing burner. It is built into the cylindrical part of the case, and the tip outlet of the fuel supply pipe that supplies the liquid fuel into the vaporizing cylinder penetrates the peripheral wall of the cylindrical part and faces the primary air port of the vaporizing cylinder, so that it is used for the air passage. Japanese Patent Application Laid-Open No. 61-223416 discloses a device in which a pipe is not required and the entire apparatus is reduced in size.

In the above-described conventional vaporization type combustion apparatus, the fuel supply pipe is fixed by a fixture attached to the outer peripheral surface of the cylindrical portion, and the portion inserted into the cylindrical portion is not held at all. If it is difficult to set the tip of the fuel supply pipe on the center axis of the primary air port of the vaporizing cylinder, and if the tip of the fuel supply pipe is largely displaced from the center axis of the primary air port, However, there have been problems such as deterioration of the spraying state, incomplete vaporization, and the inability to form a uniform flame.

Therefore, in order to solve the above problems,
In some cases, a holder for holding the tip of the fuel supply pipe is provided at the primary air port of the vaporizing cylinder.In this case, the addition of the holder not only increases the number of components but also causes the holder to be installed inside the device. , The operation of inserting the fuel supply pipe into the hole of the holder becomes very troublesome, and there is a problem that the assembling workability is deteriorated.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and enables a fuel supply pipe to be reliably set at a predetermined position without increasing the number of parts. The purpose is to improve workability.

[0006]

According to the present invention, a cylindrical case, a vaporizing cylinder incorporated in the cylindrical case, a fuel supply pipe for supplying liquid fuel to the inside of the vaporizing cylinder, A temperature detector for detecting a temperature, and a fixing bracket for fixing the temperature detector, wherein the fixing bracket is provided integrally with a mounting piece attached to the outer peripheral surface of the peripheral wall of the cylindrical case, A support piece that is inserted into the cylindrical case from an insertion opening opened in the peripheral wall of the cylindrical case, and has a folded back portion that is formed substantially parallel to the mounting piece at the distal end; The folded portion and the mounting piece are each provided with a hole into which the fuel supply pipe is inserted.

[0007]

As described above, since the fixing bracket for fixing the temperature detector has the supporting piece for supporting the fuel supply pipe in the cylindrical case, the fixing of the temperature detector and the fuel supply pipe can be performed by one component. Not only can the fuel supply pipe be held, but also the fuel supply pipe can be reliably set at a predetermined position, and the setting failure of the fuel supply pipe can be prevented with a small number of parts. Further, the support piece for holding the fuel supply pipe in the cylindrical case is inserted into the cylindrical case from an insertion opening formed in the peripheral wall of the cylindrical case, and is fixed by attaching the mounting piece to the cylindrical case. Therefore, the fuel supply pipe can be fitted into the hole of the folded portion and the hole of the mounting piece before the fixing bracket is attached, and the fuel supply pipe can be easily inserted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 denotes a blower for supplying air for combustion.
And a blower fan 3 made of synthetic resin driven by the motor 2
And a blower case 4 for accommodating the blower fan 3. The blower 1 is formed in a flat shape, and is supported by a motor case 5 serving also as a support base made of a synthetic resin. The motor case 5 is integrally formed with an air inlet 7 to which a filter 6 is attached. It is placed and fixed on the bottom plate 8 of the case.

The blower case 4 comprises a lower case 4A to which the motor 2 is fixed and which is attached to the upper surface of the motor case 5, and an upper case 4B combined with the lower case 4A. At the approximate center of the upper surface of the upper case 4B, a heavenly cylindrical portion 9 that rises upward is integrally press-formed. Reference numeral 10 denotes an air distribution plate provided at an upper portion in the upper case 4B. The air distribution plate 10 has a plurality of ventilation holes 11, 11 formed in a ring shape. The cylindrical portion 9 is provided with an opening 12 substantially at the center of the top surface portion 9A, and a plurality of secondary air holes 13 arranged annularly at the outer periphery of the opening 12.

Reference numeral 14 denotes a rotation speed detector for detecting the rotation speed of the blower fan 3, and the rotation speed detector 14 penetrates the side wall of the upper case 4B so that the tip thereof faces the upper case 4B. The detecting section is associated with the peripheral portion of the blower fan 3. Reference numeral 15 denotes a vaporizing burner.
A burner head 17 having a plurality of flame holes a and a on its side wall is mounted on a top end opening of a bottomed cylindrical vaporizing cylinder 16 for vaporizing liquid fuel (kerosene) via a throttle plate 18, and ,
A burner ring 19 is arranged on the outer periphery of the burner head 17.

The vaporizing cylinder 16 is made of aluminum die-casting. A primary air port 21 communicating with the inside of the cylindrical portion 9 is provided on a protruding portion 20 formed on a part of the peripheral wall thereof. An insertion groove 22 that opens laterally is provided adjacent to the opening 21, and the tip of a rod-shaped temperature detector 23 that detects the temperature of the vaporization cylinder 16 is inserted into the insertion groove 22.

The temperature detector 23 is inserted into the cylindrical portion 9 through a through hole 25 formed in the flat surface 24 of the peripheral wall 9B of the cylindrical portion 9 so as to face the insertion groove 22. An annular protruding portion 26 is formed on the outer peripheral surface of the container 23 so as to abut against the outer surface of the peripheral wall 9B of the cylindrical portion 9, and a fixing bracket 28 attached to the flat surface 24 of the peripheral wall 9B of the cylindrical portion 9 with screws 27. It is fixed by retaining.

At the upper end of the peripheral wall of the vaporizing cylinder 16, that is, around the opening at the tip of the vaporizing cylinder 16, an electric heater 29 for vaporization such as a sheath heater is embedded and the cylindrical portion 9 is provided.
An annular flange 30 is formed on the top surface 9A. The vaporizing cylinder 16 incorporates the lower part where the primary air port 21 is formed into the cylindrical part 9 through the opening 12, so that the combustion air sent into the cylindrical part 9 passes through the primary air port 21. And supplied to the inside as primary air.

Reference numeral 31 denotes a fuel supply pipe for supplying a liquid fuel (kerosene) into the vaporization cylinder 16. The fuel supply pipe 31 is disposed concentrically inside the primary air port 21 of the vaporization cylinder 16. A needle-shaped spray nozzle 31A having a front jet port 32 facing the inside of the vaporizing cylinder 16 is connected to a fuel tank 34 via a fuel pump 33, and the base of the spray nozzle 31A is fitted to the front end of the nozzle. Spray nozzle 31A
The oil feed pipe 31B has a larger diameter than the oil feed pipe 31B. In addition, an annular protrusion 35 is formed on the outer periphery near the tip of the oil supply pipe 31B.

The fixing bracket 28 has a mounting piece 28A provided with a horizontally long notch 36 at one end for inserting the temperature detector 23 and a mounting hole 37 at the center.
While being integrally molded with the other end of the mounting piece 28A,
The primary air port 2 of the vaporizing cylinder 16 is provided on the flat surface 24 of the cylindrical portion 9.
A substantially L-shaped support piece which is inserted into the cylindrical portion 9 from an insertion opening 38 opened opposite to 1 and has a bent portion 39 which is bent at the end thereof and is substantially parallel to the mounting piece 28A. 28B
The first portion in which the spray nozzle 31A of the fuel supply pipe 31 is inserted into the folded portion 39 of the support piece 28B.
And a second hole 4 into which the oil feed pipe 31B of the fuel supply pipe 31 is inserted.
The first and second holes 40, 41 are opposed to each other.

The dimension from the mounting piece 28A to the folded portion 39 is set to about 20 mm, and when the mounting piece 28A is brought into contact with the flat surface 24, the folded portion 39 becomes the primary air port 21 of the vaporizing cylinder 16. Approach the entrance. Also,
The diameter of the first hole 40 is set to a small diameter of about 1.3 mm by approximating the outer diameter of the spray nozzle 31A, and the diameter of the second hole 41 is approximated to the outer diameter of the oil feed pipe 31B. Is set to a large diameter of about 3 mm. Reference numeral 42 denotes a stepped portion formed on the peripheral edge of the notch 36, and the stepped portion 42 and the hole edge of the through hole 25 sandwich the annular projection 26 of the temperature detector 23. . 43 is the mounting piece 2
This is a screw hole provided to the left of the insertion port 38 corresponding to the mounting hole 37 of 8A.

Reference numeral 44 denotes a fixing plate for fixing the fuel supply pipe 31 so as to prevent the fuel supply pipe 31 from coming off.
A notch 45 for inserting the first oil feed pipe 31B was provided, and a mounting hole 47 was provided in the other end portion corresponding to the screw hole 46 provided on the right of the insertion port 38, and the notch 45 was provided. One end is overlapped on the mounting piece 28A of the fixing bracket 28, and the other end is attached to the flat surface 24 of the tubular portion 9 with a mounting screw 48. Reference numeral 49 denotes a stepped portion formed on the periphery of the notch 45, and the stepped portion 49 and the hole edge of the second hole 41 form the oil feed pipe 3
1B of the projection 35 is sandwiched.

Reference numeral 50 denotes a frame rod; 51, an ignition rod; 53, a cartridge tank for supplying fuel to the fuel tank 34; 54, a burner stand mounted on the tubular portion 9; The assembled air duct 56 is a combustion tube.

In the above configuration, the electric heater for vaporization 2
When the temperature of the vaporizing cylinder 16 rises above the vaporizable temperature of the liquid fuel by the energization to the fuel cell 9, the temperature detector 23 detects the temperature and the blower 1 starts operating, and the blower fan 3 of the blower 1
By the rotation of the air, the air passes through the filter 6, enters the motor case 5 from the air suction port 7, and is sucked into the blower case 4. The air sucked into the blower case 4 is sent substantially uniformly over the entire circumference in the tubular portion 9 through the ventilation holes 11, 11 of the air distribution plate 10, and is sent into the tubular portion 9. Part of the air passes through the primary air port 21 and is supplied into the vaporization cylinder 16 as primary air.

When the fuel pump 33 starts operating, the liquid fuel in the fuel tank 34 is pumped up by the fuel pump 33, passes through the oil supply pipe 31B, and is ejected from the tip discharge port 32 of the spray nozzle 31A to be vaporized. It is supplied into the cylinder 16. The liquid fuel supplied into the vaporization cylinder 16 is
The gas is instantaneously vaporized in the vaporizing cylinder 16 and mixed with the primary air. This mixed gas passes through the passage of the throttle plate 18 and is sent into the burner head 17 to be ejected from the flame holes A and A, and the ignition rod 51 Ignited by the spark, and a flame is formed on the side of the flame hole a to start combustion.

On the other hand, the remaining air sent into the cylindrical portion 9 passes through the secondary air holes 13 and is ejected as secondary air into the burner stand 54 to rise, and is supplied to the flame to perform secondary combustion. Promote. Then, by controlling the number of revolutions of the motor 2 and the number of oscillations of the fuel pump 33 mutually, the combustion amount is switched from strong to weak in multiple stages or proportionally.

Next, a procedure for mounting the temperature detector 23 and the fuel supply pipe 31 in the above-described vaporization type combustion apparatus will be described. First, as shown in FIG. 6, after inserting the distal end of the temperature detector 23 through the through hole 25 and inserting it into the cylindrical portion 9, the distal end is inserted into the insertion groove 22 of the vaporization cylinder 16,
The annular projection 26 is abutted against the edge of the through hole 25. Next, with the fuel supply pipe 31 fitted in the first and second holes 40 and 41, the support piece 28B of the fixture 28 is inserted into the cylindrical portion 9 from the insertion port 38, and the mounting piece 28A
The temperature sensor 23 is inserted through the notch 36 of the
Against the flat surface 24 of the tubular portion 9. Here, if the mounting hole 37 of the mounting piece 28A is aligned with the screw hole 43 of the flat surface 24, and the mounting piece 28A is fastened to the flat surface 24 of the tubular portion 9 via the screw 27, the temperature detector 23 The annular protrusion 26 is sandwiched between the stepped portion 42 and the hole edge of the through hole 25. Thus, the temperature detector 23 is prevented from falling off, and the support piece 28B is also fixed.

Next, as shown in FIG.
The oil feed pipe 31 is inserted through the notch 45 of the fixing plate 44, and one end of the fixing plate 44 is overlapped on the mounting piece 28A of the fixing bracket 28. In this state, the mounting hole 47 is inserted into the screw hole 46. After the matching, the fixing plate 44 is fastened to the flat surface 24 of the tubular portion 9 via the mounting screw 48. At this time, the projection 35 of the oil feed pipe 31 is sandwiched between the stepped portion 49 and the edge of the second hole 41, and the fuel supply pipe 31 is thus fixed and prevented from falling off.

According to the present embodiment, the support piece 2 having the first hole 40 into which the spray nozzle 31A is inserted, and the folded portion 39 holding the middle of the spray nozzle 31A is formed at the tip.
8B is integrally formed with a mounting piece 28A of a fixing fitting 28 for retaining and fixing the temperature detector 23, and the mounting piece 28A is provided with a second hole 41 into which an oil feed pipe 31B is inserted. The temperature detector 23 can be
Not only can the fixing of the fuel supply pipe 31 be carried out, but also the return portion 39 holds the intermediate position of the spray nozzle 31A in the vicinity of the primary air port 21 of the vaporizing cylinder 16, so that the spray nozzle 31A can be reliably set so as not to be displaced from the central axis of the primary air port 21 of the vaporizing cylinder 16, and the setting failure of the fuel supply pipe 31 can be prevented with a small number of parts.

The support piece 28B is inserted into the cylindrical part 9 from an insertion opening 38 formed in the peripheral wall 9B of the cylindrical part 9, and the mounting piece 28A is connected to the cylindrical part 9 via a screw 27. Before the fixing bracket 28 is attached, the spray nozzle 31A is attached to the first hole 40 of the folded-back portion 39, and the oil feed pipe 31B is attached to the attachment piece. The fuel supply pipe 31 can be easily inserted into the first and second holes 40 and 41, respectively.

In the above-described embodiment, the support piece 28B is partly attached to the mounting piece 28A of the fixing fitting 28, and the support piece 28B is
Since the insertion opening 38 for insertion into the inside is closed, the insertion opening 38 can be used without using a special sealing part.
Can be performed, and the configuration can be simplified.

The temperature detector 23, the fixing fitting 28, the fuel supply pipe 31, and the fixing plate 44 can be attached and detached from the outside of the side of the tubular portion 9, and these parts are arranged close together. As a result, assembly workability can be improved.

Further, a first hole 40 into which the spray nozzle 31A is inserted and a second hole 41 into which the oil feed pipe 31B is inserted are provided in the support piece 28B and the mounting piece 28A which are integrally formed. Since the fuel supply pipe 31 is supported at two points, the centering accuracy of the fuel supply pipe 31 is improved.

[0029]

As is apparent from the above description, according to the present invention, the fixture for fixing the temperature detector is provided integrally with the mounting piece mounted on the outer surface of the peripheral wall of the cylindrical case, and A support piece that is inserted into the cylindrical case from an insertion opening opened in the peripheral wall of the cylindrical case, and has a folded back portion that is formed substantially parallel to the mounting piece at the distal end; Since the folded portion and the mounting piece are provided with holes for inserting the fuel supply pipe, the fuel supply pipe can be fixed while one part serves to fix the temperature detector and hold the fuel supply pipe. It is possible to reliably set the fuel supply pipe at a predetermined position and prevent the fuel supply pipe from being defectively set without increasing the number of parts. Also, the support piece is inserted into the cylindrical case from an insertion opening opened in the peripheral wall of the cylindrical case, and is fixed by attaching the mounting piece to the cylindrical case, so before attaching the fixing bracket, The fuel supply pipe can be inserted into each of the plurality of holes, and the operation of inserting the fuel supply pipe can be easily performed, and the assembly workability can be improved.

[0030]

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a liquid fuel combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view of the entire configuration of the liquid fuel combustion device.

FIG. 3 is an enlarged sectional view of a main part of FIG. 2;

FIG. 4 is a plan sectional view of a main part of the same.

FIG. 5 is a front view of the main part.

FIG. 6 is a plan sectional view of the same main part in an exploded state.

[Explanation of symbols]

 Reference Signs List 9 cylindrical part (cylindrical case) 9B peripheral wall 16 vaporization cylinder 23 temperature detector 28 fixing bracket 28A mounting piece 28B support piece 31 fuel supply pipe 38 insertion port 39 folded part 40 first hole (hole) 41 second hole (Hole)

Continuation of the front page (56) References JP-A-4-158106 (JP, A) JP-A-61-223416 (JP, A) JP-A-1-212805 (JP, A) Jpn. , U) Japanese Utility Model 1983-148423 (JP, U) Japanese Utility Model 7-44036 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F23D 11/10

Claims (1)

(57) [Claims] 1. A cylindrical case, a vaporizing cylinder incorporated in the cylindrical case, a fuel supply pipe for supplying liquid fuel to the inside of the vaporizing cylinder, and a temperature detector for detecting a temperature of the vaporizing cylinder. A fixing member for fixing the temperature detector, wherein the fixing member is provided integrally with the mounting piece attached to the outer surface of the peripheral wall of the cylindrical case, and is opened on the peripheral wall of the cylindrical case. And a support piece having a folded portion substantially parallel to the mounting piece formed at the tip end thereof.The folded portion of the support piece and the mounting piece have And a hole into which the fuel supply pipe is inserted.