JPS5952121A - Air volume switching device for combustion machine - Google Patents

Abstract

PURPOSE:To provide the titled device which is compact and produces a reduced level of noise, by mounting a holder in such a manner that an air adjusting board having a plurality of through ports may not be movable in an axial direction. CONSTITUTION:An air adjusting board 11 located at the end opening of suction tube 9 is provided at the central portion thereof with a large diameter through port 12 and three small diameter through ports 13 defined at the outer periphery thereof. An electric magnetic plunger 14 provided at the depthwise portion of suction tube 9 as if the plunger 14 opposed against the air adjusting board 11 comprises a plunger 14c movable forward and backward (in the axial direction) by the energization of electric magnet coil 14b in a plunger main body 14a and an opening/closing member 15 for the large diameter hole 12 of air adjusting board 11 integrally provided at the top end of plunger 14c by means of a pin 16. Moreover, since the air adjusting board 11 is located in position by a threaded engagement with a holder 18 having the electric plunger 14 provided thereto, the air adjusting board 11 cannot be moved in the direction of arrow mark (a) and consequently retains its predetermined position in use of extended periods.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air volume switching device for a forced air supply/exhaust type combustion machine.

Conventional configuration and problems Generally, in this type of air volume switching device, only the air adjustment plate is provided in the air supply system, and the opening/closing drive means is provided outside the air supply system, making the entire system large. There was a problem of Furthermore, since the opening/closing driving means is provided outside the air supply system path, there is a connecting means that penetrates the air supply system path wall between the opening/closing driving means and the opening/closing body of the air adjustment plate. There were also problems such as air leakage from this part and noise caused by the sound of air leakage.

Therefore, the present inventors proposed an opening/closing body 16f as shown in FIG.
An air volume switching device that opens and closes one of the openings 1-1 of the air adjustment plate 11 by moving it in the axial direction was devised and incorporated into the air supply system. According to this, the equipment was made more compact and the noise was reduced to a low level, and the desired objective was almost achieved.

However, the opening/closing body 16 moves in the axial direction and comes into contact with the air adjustment plate 11, but when it is installed in the air supply system, due to assembly errors etc., the opening/closing body 16 and the air adjustment plate 11 are When the air adjustment plate 11 is opened 1. 'l 12 'i There was a problem in which defective products could not be closed.

OBJECTS OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to eliminate defective products caused by assembly errors in a wind exchange device, which aims to make the device more compact and reduce the noise level.

Composition of the Invention The air volume switching device for a combustor of the present invention comprises: an air adjustment plate having a plurality of through holes; an opening/closing body for opening and closing at least one of the through holes; and an opening/closing body for moving the opening/closing body in an axial direction. a drive device that opens and closes the through hole, and a holder that fixes and holds the drive device in an air supply system passage, and the air adjustment plate is attached to the holder so as not to be movable in the axial direction. It is.

DESCRIPTION OF EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.
The figure shows a warm air heater. 1 is the heater body, 2 is a combustion machine installed inside the body 1, and the combustion gas is exchanged with the wind from the fan 4 in the heat exchanger 3, and then It is discharged outdoors from the exhaust port 6 of the top 6.

On the other hand, combustion air used for combustion in the combustor 2 is taken in from the air intake lower of the intake/exhaust top 6 and flows through the bellows pipe 8 to the air intake pipe 9 of the combustor 2.

This air supply pipe 9 is provided integrally with the combustor 2 and is incorporated into the heater main body 1, and one end thereof, that is, the connection part with the bellows pipe 8 is located on the back plate of the heater main body 1 as described in 2. Posteriorly - protruding. An air volume switching device 10 is incorporated in one end of the distribution trachea 9 to vary the air sensitivity to the combustion machine 2.

To explain this air volume switching device 10 below, in FIG. A small diameter through hole 13 is formed.

Reference numeral 1'4 denotes an electromagnetic plunger disposed at the back of the air supply pipe 9 so as to face the air adjustment plate 11, and the plunger moves back and forth (on the axis) by the excitation of the electromagnetic coil 14b in the plunger body 4a. 140, and an opening/closing body 16 that opens and closes the large through hole 12 of the air adjustment plate 11 at its tip.
are integrally attached by pins 16. This opening/closing body 1
Reference numeral 6 is made of a soft material such as rubber, and in this embodiment in particular, the surface facing the air adjustment plate 11 has an arcuate shape.

Then, from the rear part of the opening/closing body 16, a snake-like cylindrical cover part 151L that covers the outer periphery of the plunger is taken out, and its end is pressed against the front end surface of the plunger body 14L, so that the plunger body 14a and the plunger It is designed to cover the gap t between 14C and 14C. Reference numeral 17 denotes a spring for always bringing the opening/closing body 16 into pressure contact with the large diameter hole 12 of the air adjustment plate 11 to close it, and the cover part 16! It also serves to press the end of L to the front end surface of the plunger main body 141L. Reference numeral 18 denotes a plunger holder for fixing the electromagnetic plunger 14 to the inner surface of the air supply pipe, and a radial rib 18b located on the outer periphery of the hollow cylindrical portion 18 & into which the electromagnetic plunger 14 is fitted is attached to the inner surface of the air supply pipe 9. The electromagnetic plunger 14 is firmly fixed in the air supply pipe by screws 19.

The ribs IBb of the boulder 18 are provided so as to extend along the longitudinal direction as shown in FIG. 4, and can be fixed simply by tightening screws at these locations. A screw 180 is formed on the inner surface of the tip side of this holder 18, and a threaded cylindrical portion 1 formed on the air conditioning plate 11 is connected to this screw 180.
12L is screwed to fix the air adjustment plate 11 to the boulder 18.

As shown in FIG. 2, the ribs 18b of the holder 18 are set so as not to face the small through holes 13 of the air adjustment plate 11, so that the ribs 18b of the holder 18 do not disturb the flow of air flowing in from the small through holes 13. This is a consideration.

2, in this air volume switching device, as described above, the plunger 14C reciprocates back and forth, and the single-digit opening/closing body 16 is pressed into contact with the large through hole 12 of the air adjustment plate 11. , defect and switch efflorescence.

At this time, Y, the opening/closing member 16 attempts to push out the air adjustment plate 11 in the direction of arrow a by FE contact with the large through hole 12; Since it is fixed by screwing onto the 1-digit holder 18, it will not move in the direction of the arrow a, and will always remain at the '712 position even if used for a long period of time.

The air adjustment plate 11 is mounted on a holder 18 that is integrated with the electric plunger 14. Since there is only one air adjustment plate 11, the positional relationship between the air adjustment plate 11 and the opening/closing body 16 that is attached to the plunger 140 is determined by assembly. It can also be made constant regardless of the work.

In the above embodiment, the air adjustment plate 11 is fixed to the holder 18 using a screw connection, but any other connection method such as a bayonet connection may be used as long as the air adjustment plate 11 does not move in the axial direction. It may be something.

Effects of the Invention The air volume switching device for a combustor of the present invention includes: an air adjustment plate having a plurality of through holes; an opening/closing body that opens and closes at least one of the through holes; and an opening/closing body that moves the opening/closing body in an axial direction. a drive device that opens and closes the through hole, and a holder that fixes and holds the drive device in an air supply system passage, and the air adjustment plate is attached to the holder so as not to be movable in the axial direction. Therefore, even after long-term use, the air conditioning plate will not move in the axial direction, and you can always expect reliable airflow switching as designed. Since the holder for holding the drive means is designed to be able to hold one frame, there is no possibility of defects due to assembly errors, and it can be made compact and quiet, so its practical value is great. There is.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a hot air heater incorporating an air volume switching device according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view showing the integrated part of the air volume switching device, and Fig. 3 is the same device. Fig. 4 is an enlarged sectional view of the conventional device, Fig. 6 is a sectional view of the plunger holder,
Figure 6 is a diagram of 11:. 9...Air supply pipe, 11...Air adjustment plate,
12.13... Through hole, 14... Electromagnetic drive means, 142L... Electromagnetic plunger body,
140...Plunger, 16...Opening/closing body, 18...Plunger Porg, 18b
······rib.

Claims (1)

[Claims] an air conditioning plate having a plurality of through holes; an opening/closing body that opens and closes at least one of the through holes; a drive device that moves the opening/closing body in an axial direction to open and close the through holes;
An air volume switching device for a combustion machine, comprising: a holder for fixing and holding the drive device in an air supply system passage; and the air adjustment plate is attached to the holder so as not to be movable in an axial direction.