JP2006029712A - Oil burning boiler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil burning boiler capable of accurately controlling amount of combustion in a combustion part by reducing influence of outside air when strong wind blows. <P>SOLUTION: An air supply amount adjusting part 17 composed of a slide plate 19 and a driving mechanism 18 for driving the slide plate 19 forward and backward is provided in a connection part of an air supply duct and an air blowing part. The driving mechanism 18 is composed of a driving motor 22, a stacked gear 21 mounted on a rotary shaft of the driving motor 22 to integrate diameter parts having different diameter, a rack 20 forming a small tooth form part 20a, a middle tooth form part 20b, and a large tooth form part 20c by separating them in the forward, backward, left, and right directions from each other, and a stay 23 for connecting the rack 20 with the slide plate 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an oil-fired hot water boiler, and more particularly to a configuration for reducing the influence of outside air and adjusting the amount of air supplied to a burner.

  Conventional oil-fired hot water boilers adjust the amount of air supplied from a blower fan to a combustion section equipped with a burner by increasing or decreasing the number of rotations of the blower fan to increase or decrease the amount of combustion. However, in the control of the rotational speed of the blower fan, there is a problem that the adjustment of the air supply amount is insufficient.

  As another embodiment, there is an example in which a combustion apparatus for a hot water boiler is configured as shown in FIG. 4 in order to finely adjust the air supply amount. In this combustion apparatus, the inside of a burner case 40 formed in a cylindrical shape is partitioned by a partition plate 45, a blower part 41 is provided on one of the partitioned parts, and a combustion part 42 is provided on the other partitioned part. The blower unit 41 includes a fan motor 43 and a blower fan 44 that is pivotally supported by the fan motor 43, and the combustion unit 42 includes a vaporization cylinder 47 formed in a cylindrical shape and the fan motor 43. The rotary cup 49 is pivotally supported together with the fan 44, and the burner head 48 is mounted on the vaporizing cylinder 47. The combustion section 42 is supplied with fuel oil from an oil feed pipe. The partition plate 45 is provided with an open / close damper 46 (see, for example, Patent Document 1).

  The fuel oil supplied from the oil feeding pipe to the vaporizing cylinder 47 is scattered in a mist form by the rotating rotary cup 49 and is evaporated by the vaporizing cylinder 47 which has reached a high temperature to be in an atomized state. The fuel oil in the atomized state is mixed with air sent from the blower unit 41 to become combustion air suitable for combustion, and is ignited by an ignition plug (not shown) and burned by the burner head 48. In addition, the adjustment of the air supply amount from the blower unit to the combustion unit 42 increases or decreases the rotational speed of the fan motor 43 and appropriately adjusts the open / close amount of the open / close damper 46 provided on the partition plate 45. Thus, the amount of combustion in the burner head 48 is finely controlled.

  However, since the outside air is supplied to the air blowing unit 41 through a duct (not shown), for example, during a strong wind, a large amount of air is blown into the air blowing unit 41, and the rotation speed of the air blowing fan 44 is adjusted. There is a problem in that the amount of combustion in the combustion unit 42 cannot be accurately controlled by opening and closing the open / close damper 46 provided between the blower unit and the combustion unit 42. Further, since the opening / closing damper 46 has a mechanism that opens and closes at a constant speed, there is a problem that the influence on combustion becomes excessive.

Japanese Patent Laid-Open No. 2-50009 (page 2, FIG. 1)

  In view of the above-described problems, an object of the present invention is to provide an oil-fired hot water boiler that can reduce the influence of outside air during strong winds and the like and can accurately control the amount of combustion in the combustion section.

  In order to solve the above problems, the present invention provides a blower, a combustion unit, and a heat exchange unit in a housing having an air supply port and an exhaust port, and supplies the air supply port and the air supply unit. In a hot water boiler connected by an air duct and connecting the heat exchanging part and the exhaust port by an exhaust duct, a structure in which an air supply amount adjusting means is provided at a connection part between the air supply duct and the air blowing part It has become. Further, the air supply amount adjusting means is configured to change the rate of change of the air supply amount in accordance with the opening degree of the opening. The air supply amount adjusting means includes a slide plate that opens and closes the opening and a drive mechanism that moves the slide plate at a variable speed. In addition, the drive mechanism is mounted on a drive motor, a rotation shaft of the drive motor, and a laminated gear integrated so as to laminate a plurality of gears having different diameters, and a plurality of tooth portions meshing with the laminated gear Are formed separately from each other in the front-rear and left-right directions, and are connected to the slide plate.

  According to the present invention, an air supply amount adjusting unit including a slide plate and a drive mechanism for driving the slide plate back and forth is provided at a connection portion between the air supply duct led out from the air supply box and the frame of the air blowing unit. The drive mechanism is mounted on the drive motor fixed to the inner wall surface of the frame, and the large-diameter portion, the medium-diameter portion, and the small-diameter portion having different diameters are attached to the front and rear of the drive motor. A gear that is integrated, a small tooth portion corresponding to the large diameter portion, a middle tooth shape portion corresponding to the medium diameter portion, and a large tooth shape portion corresponding to the small diameter portion. Each of the racks and the stays that connect the rack and the slide plate, the slide plate is moved at a variable speed by the drive mechanism, and the opening of the opening is Gradually changes and the air supply to the combustion section fluctuates rapidly Without causing, thereby making it possible to adjust accurately the amount of air delivered. As a result, combustion in the burner head can be stably continued, and the opening of the air supply amount adjusting unit is closed or close to the closed state by the slide plate even in bad weather or strong winds. Thereby, it can be set as the hot water boiler which can prevent the malfunction, such as affecting the combustion in a combustion part by blowing in strong wind, or a raindrop entering a combustion part.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

  FIG. 1 is a sectional view showing a hot water boiler according to the present invention, and FIG. FIG. 3 is a side view and perspective view showing the open / close damper.

  As shown in the cross-sectional view of FIG. 1 and the configuration diagram of FIG. 2, the hot water boiler according to the present invention is formed in a rectangular shape, and has a box-like shape provided with an air supply opening at the upper part of the casing 1 installed outdoors. An air supply box 2 and a box-shaped exhaust box 3 having an exhaust port are provided. A hot water pump 13 connected with a hot water pipe 14 is disposed on one lower side of the housing 1, and the hot water pipe 14 communicates with a fan convector provided with a radiator installed indoors. The hot water sent from the hot water pump 13 is circulated through the radiator.

  On the other side of the lower part of the housing 1, a blower unit 4, a combustion unit 5, a chamber 6, and a heat exchange unit 7 are provided in order from below. The blower unit 4 includes a frame 9, a blower fan 10 that is rotatably supported in the frame 9 and arranged in two upper and lower stages, and a fan motor that is mounted on the lower surface of the frame 9 and drives the blower fan 10. The air supply box 2 and one side of the frame are communicated with each other through an air supply duct 15.

  The combustion unit 5 is mounted on the upper surface of the vaporization cylinder, a cylindrical vaporization cylinder whose upper and lower surfaces are opened, a rotary cup 10 and a diffusion plate that are mounted on the rotating shaft of the fan motor together with the blower fan 10. The burner head 12 and the oil feed pipe 8 introduced into the vaporizing cylinder are mixed with the fuel supplied through the oil feed pipe 8 and the air supplied from the blower unit 4 for combustion air. And is burned by the burner head 12.

  The chamber 6 stabilizes the combustion gas combusted by the burner head 12. The heat exchanging unit 7 is wound with a hot water pipe 14 connected to the hot water pump 13 so as to heat the hot water circulating through the hot water pipe 14 with the high-temperature combustion gas released from the combustion unit 5. It has become. The heat exchanging section 7 is communicated with the exhaust box 3 by an exhaust duct so that the combustion gas having a low temperature is discharged to the outside through the discharge port.

  The air supply duct 15 led out from the air supply box 2 is connected to the frame 9 of the air blowing unit 4 as shown in FIG. A quantity adjusting unit 17 is provided.

As shown in the sectional view of FIG. 3A and the perspective view of FIG.
It comprises a slide plate 19 that opens and closes an opening 17a formed between the frame 9 of the blower unit 4 and the air supply duct 15, and a drive mechanism 18 that drives the slide plate 19 back and forth. The drive mechanism 18 is mounted on a drive motor 22 fixed to the inner wall surface of the frame 9, a rotation shaft of the drive motor 22, and has a large diameter portion 21a, a medium diameter portion 21b, and a small diameter portion, each having a different diameter. The laminated gear 21 integrated so as to laminate the front and rear 21c, the small tooth portion 20a corresponding to the large diameter portion 21a, the middle tooth portion 20b corresponding to the medium diameter portion 21b, and the small diameter portion The rack 20 is formed by separating the large tooth portion 20c corresponding to 21c in the front-rear and left-right directions, and a flat-plate stay 23 that connects the rack 20 and the slide plate 19.

  In a state where the slide plate 19 closes the opening portion 17a, the small diameter portion 21c of the laminated gear 21 meshes with the large tooth portion 20c of the rack 20, and in a state where the opening portion 17a is opened. The large-diameter portion 21a of the laminated gear 21 and the small-diameter portion 21c of the rack 20 are engaged with each other.

  When the opening 17 a is shifted from the closed state by the slide plate 19 to the opened state, first, when the laminated gear 21 is rotated by the drive motor 22, the small diameter portion of the laminated gear 21. The rack 20 and the slide plate 19 connected to the rack 20 are moved toward the drive motor 22 at a relatively low speed by the large-tooth portion 20c of the rack 20 meshed with the rack 21c, and then the medium diameter portion 21b. And the middle tooth portion 20b mesh with each other and move at a relatively medium speed. Subsequently, the large-diameter portion 21a and the small tooth mold portion 20a are engaged with each other so that the slide plate 19 moves at a relatively high speed. Further, when the opening 17a is closed, the moving speed of the slide plate 19 is gradually reduced. When the opening area of the opening 17 decreases, the rate of change of the amount of air passing through the opening 17 tends to increase, but when the opening area decreases, the moving speed of the slide plate 19 increases. The mechanism for reducing the air flow makes it possible to finely adjust the air supply amount without affecting the combustion.

  Next, the operation will be described. When fuel oil is supplied from the oil feed pipe 8 to the rotary cup 11, the fuel oil is sprayed into the vaporizing cylinder by the rotating rotary cup 11. The scattered fuel oil collides with the heated inner wall of the vaporizing cylinder and evaporates, and the evaporated fuel oil mixes with the air sent out by the blower fan 10 of the blower unit 4 and rises as combustion air. The rising combustion air is ignited and burned by a spark plug, and is blown out as a flame from a circular hole formed in the burner head 12, and the blown-out combustion gas passes through the chamber 6 to the heat exchange unit 7. pass. At that time, the hot water passing through the hot water pipe 14 wound around the heat exchanging section is heated, and the combustion gas having a low temperature by heating becomes exhaust gas, and the exhaust box 3 passes through the exhaust duct 16. It is designed to be discharged from the exhaust port. Further, outside air sucked from the air supply port is supplied to the air blowing unit 4 from the air supply amount adjusting unit 17 into the frame 9 through the air supply box 2 and the air supply duct 15. It has become.

  The air supply amount adjusting unit 17 moves the slide plate 19 and adjusts the opening degree of the opening 17a to vary the amount of air supplied to the combustion unit 4, whereby the burner head 12 The intensity of combustion is controlled. At this time, the slide plate 19 is moved at a variable speed by the drive mechanism 18 and the opening degree of the opening 17a is gradually changed, so that the amount of air supplied to the combustion part 4 is abruptly changed. Thus, the combustion in the burner head 12 can be stably continued. Further, by adjusting the amount of air sent from the blower 4 without changing the rotational speed of the blower fan 10, the control system is simplified, and the air sent to the combustion unit 5 accurately. The amount can be adjusted.

  Further, during bad weather or strong winds, strong wind or raindrops blow to the air supply port of the air supply box 2, but the opening 17 a of the air supply amount adjusting unit 17 is closed or close by the slide plate 19. In this state, it is possible to accurately prevent problems such as strong wind blowing in and affecting the combustion in the combustion unit 4 or raindrops entering the combustion unit 4.

It is sectional drawing which shows the hot water boiler by this invention. It is a block diagram which shows the hot water boiler by this invention (A) is sectional drawing which shows an air supply amount adjustment part. (B) is a perspective view showing an air supply amount adjustment unit. It is sectional drawing which shows the combustion part of the conventional warm water boiler.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Supply box 3 Exhaust box 4 Blower part 5 Combustion part 6 Chamber 7 Heat exchange part 8 Oil supply pipe 9 Frame 10 Blower fan 11 Rotary cup 12 Burner head 13 Hot water pump 14 Hot water pipe 15 Supply duct 16 Exhaust duct 17 Supply amount adjusting portion 17a Opening portion 18 Drive mechanism 19 Slide plate 20 Rack 20a Small tooth portion 20b Medium tooth portion 20c Large tooth portion 21 Laminated gear 21a Large diameter portion 21b Medium diameter portion 21c Small diameter portion 22 Drive motor 23 Stay

Claims (4)

In a housing provided with an air supply port and an exhaust port, a blower unit, a combustion unit, and a heat exchange unit are provided, the air supply port and the blower unit are connected by an air supply duct, and the heat exchange unit and In a hot water boiler formed by connecting the exhaust port with an exhaust duct,
A hot water boiler characterized in that an air supply amount adjusting means is provided at a connection portion between the air supply duct and the air blowing unit.   The hot water boiler according to claim 1, wherein the air supply amount adjusting means can vary a change rate of the air supply amount in accordance with an opening degree of the opening.   The hot water boiler according to claim 2, wherein the air supply amount adjusting means includes a slide plate that opens and closes the opening and a drive mechanism that moves the slide plate at a variable speed.   The drive mechanism includes a drive motor, a laminated gear that is attached to a rotation shaft of the drive motor, and is laminated so that a plurality of gears having different diameters are laminated, and a plurality of tooth portions that mesh with the laminated gear. The hot water boiler according to claim 3, wherein the hot water boiler is formed by a rack that is formed apart from each other in the front-rear direction and the left-right direction, and is connected to the slide plate.

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