JPH04217740A - Air volume control device - Google Patents

Abstract

PURPOSE:To perform a control over a degree of opening of a damper in a stepless manner and proper manner by a method wherein an inner circumferential wall of an air blowing passage is provided with a stopper for restricting a position of the damper when the damper is fully opened and a degree of opening of the damper is controlled with a full-opened position of the damper being applied as reference position. CONSTITUTION:A motor M starts to drive in response to a signal of a degree of opening, a damper 6 is rotated and a control device 10 controls the motor M to its proper position in response to the signal of the degree of opening. In the case that a next signal of degree of opening of the damper is inputted to the control device 10, the damper 6 is automatically returned back once to a position of a stopper 7 and the motor M is controlled in such a way as the damper 6s is turned up to a proper position corresponding to an input of a signal of degree of opening of the damper with the full-opened position being applied as a reference position. When the degree of opening of the damper is to be controlled, this operation is always repeated, the damper 6 is controlled in its rotation at a proper position in a stepless manner and then the desired amount of air can be supplied. With such an arrangement, a controlling performance of air volume is remarkably improved and a structural mechanism of the device itself is also simplified.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air volume control device for properly controlling air volume in an air conditioning duct system or the like.

0002

[Prior Art] In conventional duct air conditioning systems, the air volume is mostly controlled by either blowing the air or stopping the air blowing, and it is very time-consuming to adjust the air blowing amount to each room individually. It was very expensive. An electric damper disclosed in Japanese Utility Model Application Laid-Open No. 51-130345 has been proposed as an example of a method for individually controlling the amount of air blown in this duct air conditioning system.

[0003] The amount of air blown by this electric damper is controlled by providing a switch operating lever that interlocks with the rotating shaft of the damper plate, and disposing the switch operating lever at each position where the damper plate is fully open, fully closed, or in an intermediate state. The air volume is controlled in three stages by operating a microswitch, but the damper opening is controlled in three stages, so if you want to control the damper opening in other than these three stages, increase the number of microswitches. It is supposed to be done.

0004

[Problems to be Solved by the Invention] In the conventional example, the air volume is controlled as described above, so the air volume can only be controlled in stages, and the structure of the device becomes complicated and expensive. There was a problem.

[0005] This invention was made to solve the problems of the conventional example as described above, and it is possible to control the damper opening degree steplessly and appropriately to obtain a desired air volume. Furthermore, the object is to provide an air volume control device that has a simple structure and is inexpensive.

[0006]

[Means for Solving the Problems] Therefore, the air volume control device according to the present invention is arranged in the middle of the air duct, and is operated by driving the motor to move the air duct from the fully open position to the forward closed position. An air volume control device that adjusts air volume using a damper that rotates within a range, wherein a stopper is provided on one of the upstream and downstream sides of the inner circumferential wall of the air passage for regulating the position of the damper when the damper is fully opened. , a damper opening degree control means is provided for returning the damper to a damper fully open position regulated by the stopper each time the damper opening degree is controlled, and controlling the damper opening degree to a desired opening degree using this damper fully open position as a reference position. This aims to achieve the above objective.

[0007]

[Operation] The air volume control device according to the present invention having the above-described structure can control the opening of the damper by driving the motor, regardless of whether the damper is in any position from the fully open position to the fully closed position. When controlling the damper to a desired opening position, the damper opening control means returns the damper to the stopper that regulates the fully open position, and then uses this fully open position as a reference position to rotate the damper to the next desired damper opening position. , controls the damper to an appropriate opening degree.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (Structure) FIG. 1 is a sectional view of the configuration of an air volume control device showing an embodiment of the present invention, and FIG. 2 is a sectional view illustrating the operation of the damper of the above embodiment.

In FIGS. 1 and 2, 1 is a cylindrical damper casing, and 2 is a motor casing, which is fixed to the damper casing 1 by a mounting plate 3. 4 is a rotating shaft disposed on the vertical center line of the damper casing 1, connected to the motor M in the motor casing 2, and rotated by the drive of the motor M; 5 is a rotating bearing fitting attached to the damper casing 1; Fixed. Reference numeral 6 denotes an elliptical damper whose long side is in contact with the inner wall of the damper casing 1 at an angle of, for example, 45 degrees around the rotation axis 4, and whose short side is the inner diameter of the damper casing 1, and this damper 6 has a damper plate 6a, It is formed by a packing 6b attached to improve the sealability between the periphery of the damper plate 6a and the inner wall of the damper casing 1, and is pivotally supported by the rotating shaft 4, so that the air duct can be fully closed from the fully open position. It is configured to rotate within the operating range up to the position.

Reference numeral 7 indicates a positioning stopper 10 provided on either the upstream side or the downstream side of the inner peripheral wall of the casing 1 to regulate the position of the elliptical damper 6 when it is fully opened.
is the control unit. And damper 6, stopper 7
, the control unit 10 and the motor M constitute a damper opening control means A.

(Operation) The operation of the above configuration will be explained. First, when a damper opening signal (for example, an analog signal, a pulse signal, etc.) corresponding to the required air volume of each room is input to the motor M, the motor M starts driving in accordance with the opening signal. Accordingly, the rotary shaft 4 connected to the motor M, that is, the damper 6 rotates, and the control unit 10 controls the motor M to drive the damper 6 to an appropriate position according to the opening signal. When the next damper opening signal is input to the control unit 10, the damper 6 is automatically returned to the position of the stopper 7 that regulates the damper position when it is fully open, and the next damper is moved using this fully open position as the reference position. The motor M is controlled so that the damper 6 rotates to an appropriate position according to the input of the opening signal. When controlling the damper opening degree, this operation is always repeated to control the rotation of the damper 6 to an appropriate position steplessly, thereby supplying a desired appropriate air volume.

[0012] In this embodiment, the damper casing 1
is made into a cylindrical shape, and the damper 6 is made into an elliptical shape, but the damper 6 is not limited to this.The damper 6 may be circular, or the damper casing may be made into a desired shape such as a rectangle or square, and the damper 6 may be made into a desired shape to match this shape. The air volume control device may be configured using a damper.

[0013]

As explained above, according to the present invention, an air volume control device that controls the air volume by a damper that rotates the air passage from a fully open position to a fully closed position by the drive of a motor is configured such that the position when the damper is fully open is A stopper is provided to regulate the
When controlling the damper opening, no matter which position the damper is in, the damper is returned to the stopper at the fully open position and the damper opening is controlled using the fully open position as the reference position. Opening degree control is performed steplessly and appropriately at all times, which not only significantly improves air volume control performance, but also simplifies the structure and mechanism of the device itself, making it possible to realize an extremely inexpensive air volume control device. .

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the configuration of an air volume control device showing an embodiment of the present invention.

FIG. 2 is an explanatory cross-sectional view of the operation of the damper of the above embodiment.

[Explanation of symbols]

6 Damper 7 Stopper 8 Ventilation duct A Damper opening control means M Motor In addition, in the figures, the same or corresponding parts are represented by the same reference numerals.

Claims (1)

[Claims] [Claim 1] An air volume control device that adjusts air volume using a damper that is disposed in the middle of an air duct and rotates in an operating range from a fully open position to a forward closed position when driven by a motor. A stopper is provided on one of the upstream and downstream sides of the inner peripheral wall of the air passage for regulating the position of the damper when the damper is fully opened, and the damper is regulated by the stopper each time the damper opening is controlled. An air volume control device comprising damper opening control means for returning the damper to a fully open position and controlling the opening of the damper to a desired opening using this damper fully open position as a reference position.