JP3015657B2 - Blower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower having a function of detecting the number of revolutions used in combustion equipment such as an oil fan heater.

[0002]

2. Description of the Related Art Conventionally, a blower used for a combustion device such as an oil fan heater has a rotation speed detecting function in order to change the rotation speed of a fan motor to change a combustion air supply amount in multiple stages. As shown in FIG. 6, the conventional blower includes a motor 2 housed in a motor case 1, a blower fan 4 mounted on a rotating shaft 3 of the motor 2, and a rotating plate 5 for detecting the number of rotations. The fan case 6 includes a blower fan 4 and a rotation speed detector 7 attached to the fan case 6.

[0003]

In the blower having the conventional structure described above, the rotating plate 5 for detecting the number of revolutions is attached to the rotating shaft 3 separately from the blowing fan 4, so that the blowing fan for the rotating shaft 3 of the motor 2 is provided. In addition to not being able to detect an abnormal state such as idling of the fan 4, the rotary plate 5 and the rotation speed detector 7 are arranged on the blower fan 4, so that, for example, a burner unit that needs the blown air from the blower Cannot be connected to the upper part, and there has been a problem that it is not possible to achieve compactness including related devices.

The present invention has been made in view of the above circumstances, and includes a blower and a burner while reliably detecting the rotation speed of a blower fan and malfunctioning of a blower fan and a motor.
Blower that can reduce the size of the entire combustion device
The purpose is to provide a machine .

[0005]

According to the present invention, there is provided a blower for supplying combustion air to a burner, which includes a motor, a blower fan having a plurality of blades provided on a blade plate, and a built-in blower fan. It has a fan case, a light emitting unit and a light receiving unit,
A rotation number detector attached to a peripheral wall of a fan case so as to be located on a side portion of the blower fan, and a light-shielding portion and a light-transmitting portion are provided on an outer peripheral portion of a blade plate of the blower fan; A light emitting part and a light receiving part of the rotation speed detector are arranged on both sides of the unit, and a vaporizing cylinder of a burner is incorporated in a cylindrical part integrally formed with the fan case.

Further, according to the present invention, there is provided a blower for supplying combustion air to a burner, comprising: a motor, a blower fan having a plurality of blades provided on a blade plate, and a fan case incorporating the blower fan. A rotation speed detector attached to a peripheral wall of a fan case so as to be located on a side of the blower fan, and a plurality of protrusions are provided on an outer peripheral portion of a blade plate of the blower fan. A single piece is radially formed, and a light emitting portion and a light receiving portion of the rotation speed detector are arranged on both sides of an outer peripheral portion of the blade plate so as to sandwich the protruding piece, and a cylindrical shape integrally formed with the fan case. Burner's mind inside
It is a configuration that incorporates a gas cylinder .

According to the present invention, there is provided a blower for supplying combustion air to a burner, which includes a motor, a light-transmitting blower having a plurality of blades provided on a blade plate, and the blower. A fan case, including a light emitting part and a light receiving part, comprising a rotation speed detector attached to a peripheral wall of the fan case so as to be located on a side part of the blower fan, and on an outer peripheral part of a blade plate of the blower fan. A plurality of light shields are attached, and a light emitting unit and a light receiving unit of the rotation speed detector are arranged on both sides of an outer peripheral portion of the blade plate so as to sandwich the light shields,
A burner is installed in the cylindrical part integrally formed with the fan case.
The structure incorporates a vaporizing cylinder .

[0008]

In the blower according to the first aspect, since the rotation speed of the blower fan can be directly detected, not only an abnormal state such as idling of the blower fan with respect to the motor rotation shaft can be detected, but also the rotation speed detector is connected to the blower fan. It is attached to the peripheral wall of the fan case so as to be located in the part, and since it is a configuration in which the vaporizing cylinder of the burner is incorporated in the tubular part integrally formed with the fan case, the blower and the burner to which the combustion air is supplied from this blower are connected. It can be integrated, and the whole combustion device including the blower and the burner can be made compact.

In the blower according to the present invention, the light-shielding portion is constituted by a projecting piece integrally formed on the outer peripheral portion of the blade plate of the blower fan, so that the structure can be simplified and the action portion for detecting the number of revolutions can be provided. This makes it easier to manufacture a blower fan.

In the blower according to the third aspect of the present invention, the light-shielding portion is constituted by a light-shielding member attached to an outer peripheral portion of the blade of the blower fan, so that extra air resistance is not applied to the blade of the blower fan. , So that the wind noise does not increase.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an overall configuration diagram of a combustion device incorporating a blower as one embodiment of the present invention,
In FIG. 1, reference numeral 10 denotes a blower that supplies combustion air to a burner 11. The blower 10 includes a motor 12, a blower fan 14 mounted on a rotation shaft 13 of the motor 12,
A fan case 15 accommodating the blower fan 14 and a photo-interrupter 1 for detecting the rotation speed of the blower fan 14
6 and is mounted and fixed on a mounting table 18 via a support base motor case 17 made of synthetic resin.

The fan case 15 includes a lower case 19 to which the motor 12 is fixed and which is mounted on the upper surface of the motor case 17 and an upper case 20 combined with the lower case 19. At the approximate center of the upper surface of the upper case 20, an upwardly rising heavenly cylindrical portion 21 is integrally press-formed. Reference numeral 22 denotes an air distribution plate provided at an upper portion in the upper case 20. The air distribution plate 22 has a plurality of ventilation holes 23, 23.
Is opened in a ring.

The burner 11 vaporizes liquid fuel (kerosene).
The top opening of the bottomed cylindrical vaporization tube 24, and fitted with a burner head 26 having a plurality of burner ports 25 and 25 in the side wall portion, also, the burner ring 27 on the outer periphery of the burner head 26 Have been placed. The lower part of the vaporizing cylinder 24 is incorporated in the cylindrical part 21 from above the cylindrical part 21, and a part of a peripheral wall incorporated in the cylindrical part 21 communicates with the inside of the cylindrical part 21. A primary air port 28 is provided, and primary air for combustion is introduced from the primary air port 28, and liquid fuel (kerosene) is supplied from a fuel nozzle 29 concentrically arranged in the primary air port 28. It has become. The fuel nozzle 29 is connected to the fuel supply pipe 3.
0 and a fuel tank 32 through a fuel pump 31.

The blower fan 14 includes a wing plate 14A having a mounting boss 33 at the center and a plurality of blade pieces 14B.
14B is integrally formed of an opaque synthetic resin, and an extended outer peripheral portion of a wing plate 14A located further outside the outer end portions of the plurality of wing pieces 14B, 14B has a structure shown in FIG. As shown in FIG. 4, four projecting pieces 34, 34 as light shielding portions are provided at equal intervals. These protruding pieces 34, 34 are integrally formed with the blade plate 14A, and the spaces 35, 35 between the protruding pieces 34, 34 serve as light transmitting portions for transmitting light.

The upper case 20 of the fan case 15 is
A rectangular insertion opening 36 is provided at an appropriate position of the peripheral wall 20A, and a circuit board 37 is installed on an outer surface of the peripheral wall 20A by a screw 38 so as to close the insertion opening 36, and a light emission is provided on an inner surface of the circuit board 37. Unit 16A and light receiving unit 16B
The above-described photointerrupter 16 integrally having the above is mounted. The photo-interrupter 16 is inserted into the upper case 20 of the fan case 15 through the insertion opening 36, and the light-emitting portion 16A and the light-receiving portion 16B are vertically opposed to each other around the outer periphery of the blade plate 14A so as to sandwich the projecting piece 34. It is.

In the blower 10 having the above-described structure, when the rotating shaft 13 of the motor 12 rotates, the blowing fan 14 attached to the rotating shaft 13 rotates, and is integrally formed on the outer periphery of the blade plate 14A of the blowing fan 14. The plurality of projecting pieces 34, 34 generate a rotational motion. Here, the projecting piece 34,
34, the light-emitting portion 16A to the light-receiving portion 16B
Is intermittently blocked by the projecting pieces 34, 34, so that the photo interrupter 16 emits a pulse having a frequency four times the rotation speed of the blower fan 14.

According to this embodiment, the rotating shaft 1 of the motor 12
A plurality of protruding pieces 34, 34 are provided at equal intervals on the outer peripheral portion of the blade plate 14A of the blower fan 14 attached to the blower 3, and the upper and lower portions of the outer peripheral portion of the Light emitting part 16A and light receiving part 1 of interrupter 16
By arranging the 6B, the rotation speed of the blower fan 14 can be directly detected by the photo-interrupter 16, the idle rotation of the blower fan 14 with respect to the rotating shaft 13, forgetting to attach the blower fan 14, and forgetting to attach the fan mounting nut to the rotating shaft 13. Etc. can be detected.

The photo interrupter 16 is connected to the blower fan 14.
Is attached to the peripheral wall 20A of the upper case 20, which is a side portion of the upper case 20, and the cylindrical portion 21 is integrally formed with the upper case 20, and the vaporizing cylinder 24 of the burner 11 is incorporated in the cylindrical portion 21. And the burner 11 to which combustion air is supplied from the blower 10 can be integrated, so that the entire combustion apparatus can be made compact.
Is out of the way.

A plurality of projections 34, 34 are provided on the blade plate 14A of the blower fan 14, and the blade plate 14A itself can function as a conventional rotation plate for detecting the rotation speed. There is no need to separately prepare a rotating plate, so that the number of parts can be reduced and the assembling work can be simplified.

The light emitting section 1 of the photo interrupter 16
A plurality of protruding pieces 34, 34 integrally formed on the outer peripheral portion of the blade 14A of the blower fan 14 are provided.
Therefore, the structure can be simplified, and the production of the blower fan 14 having the action portion for detecting the rotation speed can be facilitated.

In the above-described embodiment, the blower fan 14 is made of synthetic resin, but may be made of a thin metal plate such as aluminum. 14B is caulked to the wing plate 14A,
The plurality of projecting pieces 34, 34 are formed integrally with the blade plate 14A.

FIG. 5 shows another embodiment of the blower fan 14, and the same components as those in the above-described embodiment are denoted by the same reference numerals. A blower fan 14 according to another embodiment includes a wing plate 14A having a mounting boss 33 at the center and a plurality of blade pieces 1.
4B and 14B are integrally formed of a light-transmitting transparent synthetic resin.
The slats 14 located further outside than the outer end of 4B
A light-shielding tape 40 that is opaque and impervious to light is adhered to a plurality of locations on one surface of the extended outer peripheral portion of A at equal intervals.

In the blower 10 using the blower fan 14 of another embodiment, the light emitting unit 1 of the photointerrupter 16
Since the light-shielding portion that blocks light from 6A is constituted by the light-shielding tape 40 attached to the outer peripheral surface of the blade plate 14A of the blower fan 14, the outer peripheral portion of the blade plate 14A has no irregularities, and therefore, there is no excess. Air resistance can be prevented from being added, and there is no fear that wind noise will increase.

Instead of the light-shielding tape 40, a metal film or a paint film may be applied to the outer peripheral surface of the blade 14A, or a light-shielding portion may be formed by attaching or inserting a thin metal plate. .

Furthermore, the blower fan 14 is not limited to a turbo fan, but may be a sirocco fan.

[0026]

According to the blower of the present invention, it is possible to directly detect the rotation speed of the blower fan and detect an abnormal state such as idling of the blower fan with respect to the motor rotation shaft. Is attached to the peripheral wall of the fan case so as to be located on the side of the blower fan, and the burner carburetor is incorporated in the cylindrical part integrally formed with the fan case, so that the blower and the combustion air from this blower are The supplied burner can be integrated, and the entire combustion device including the blower and burner can be made more compact.
You.

In the blower according to the second aspect ,
In addition to the effects described above, since the light shielding portion is constituted by a protruding piece integrally formed on the outer peripheral portion of the blade plate of the blower fan, the configuration can be simplified, and the blower fan having an action portion for detecting the number of rotations can be provided. It is easy to manufacture.

In the blower according to the third aspect ,
In addition to the effects described above, the light-shielding portion is constituted by a light-shielding body attached to the outer peripheral portion of the blade plate of the blower fan, so that extra air resistance can be prevented from being applied to the blade plate of the blower fan. Generation can be suppressed.

[Brief description of the drawings]

FIG. 1 is an overall configuration sectional view of a combustion device incorporating a blower as one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the same.

FIG. 3 is an explanatory diagram illustrating a relationship between a blower fan and a photo interrupter.

FIG. 4 is a bottom view of the blower fan.

FIG. 5 is a bottom view showing another embodiment of the blower fan.

FIG. 6 is a sectional view of a conventional blower.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 blower 12 motor 14 blower fan 14A wing plate 14B wing piece 15 fan case 16 photo interrupter (rotational speed detector) 16A light emitting unit 16B light receiving unit 34 projecting piece (light shielding part) 35 space (light transmitting part) 40 light shielding tape (light shielding) body)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-292708 (JP, A) JP-A-53-147566 (JP, A) JP-A-58-12862 (JP, U) JP-A-62 108867 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01P 3/486 F23N 3/08 G01D 5/36

Claims (3)

(57) [Claims] 1. A blower for supplying combustion air to a burner, comprising: a motor, a blower having a plurality of blades provided on a blade plate, a fan case incorporating the blower, a light emitting unit, and a light receiving unit. A rotation speed detector attached to a peripheral wall of a fan case so as to be located on a side portion of the blower fan, and a light-shielding portion and a light-transmitting portion on an outer peripheral portion of a blade plate of the blower fan. The light emitting part and the light receiving part of the rotation speed detector are arranged on both sides of the outer peripheral part thereof, and the burner is vaporized in the cylindrical part integrally formed with the fan case.
A blower characterized by incorporating a tube . 2. A blower for supplying combustion air to a burner, comprising: a motor, a blower fan having a plurality of blades provided on a blade plate, a fan case incorporating the blower fan, a light emitting unit, and a light receiving unit. A rotation speed detector attached to a peripheral wall of a fan case so as to be located on a side portion of the blower fan, and a plurality of protrusions are radially formed on an outer peripheral portion of a blade plate of the blower fan. A light emitting portion and a light receiving portion of the rotation speed detector are arranged on both sides of an outer peripheral portion of the blade plate so as to sandwich the protruding piece, and a burner is formed in a cylindrical portion integrally formed with the fan case. A blower characterized by incorporating a vaporizing cylinder . 3. A blower for supplying combustion air to a burner, comprising: a motor; a light-transmitting blower having a plurality of blades provided on a blade; and a fan case incorporating the blower. A rotation speed detector attached to a peripheral wall of a fan case so as to be located on a side portion of the blower fan, and a plurality of light-shielding portions are provided on an outer peripheral portion of a blade plate of the blower fan; A light-emitting part and a light-receiving part of the rotation speed detector are arranged on both sides of an outer peripheral part of the blade plate so as to sandwich the light-shielding body, and a light-receiving part is sandwiched between the light-shielding body and a cylindrical part integrally formed with the fan case. Is a blower that incorporates a burner vaporizer .