JP4711769B2 - Opening adjustment device - Google Patents

Description

  The present invention relates to an opening adjustment device for connecting to an opening of a ventilation duct to adjust an air volume.

  When air conditioning is not possible or uneconomical in large spaces such as factories, it is possible to spray air conditioned air in a spot where a worker who needs air conditioning air is present. (For example, refer to Patent Documents 1 to 4.) Further, in the spot type air conditioners described in Patent Documents 1 and 3, it is possible to arbitrarily adjust the air volume by operating the air volume adjusting damper provided at the tip of the flexible duct.

  In addition, as shown in FIG. 6, the conditioned air from an air conditioner (not shown) is normally distributed to each worker from each flexible nozzle 4 through the air duct 1. Air conditioned air is blown only when an operator is present, and is not blown when the worker is absent. Therefore, conventionally, the flexible nozzle 4 is provided with an opening / closing damper 6 in addition to the air volume adjusting damper 5 as described above, and the opening / closing damper 6 is closed when the flexible nozzle 4 is absent.

  FIG. 7 is an enlarged view of the air volume adjusting damper 5 and the open / close damper 6. As shown in FIG. 7, the air volume adjustment damper 5 adjusts the air volume by changing the angle of the valve body 52 in the cylindrical body 51 during the initial test operation, and fixes the valve body 52 at an arbitrary angle. The open / close damper 6 rotates the valve body 62 in the cylindrical body 61 by 90 ° to bring the cylindrical body 61 into a fully open state or a fully closed state.

JP-A-7-269930 Japanese Unexamined Patent Publication No. 64-19245 Japanese Utility Model Publication No. 57-60039 Japanese Utility Model Publication No. 50-40034

  Conventionally, the opening / closing damper 6 is separately provided in addition to the air volume adjusting damper 5 because the air volume adjustment is rarely performed after adjustment at the initial test operation, and the opening degree initially set is other than the administrator. Because it does not move. In the air duct that distributes the conditioned air to multiple locations, the air volume decreases as the distance increases.Therefore, the duct diameter is reduced toward the tip and the opening is adjusted so that a constant air volume is always blown from any flexible nozzle. We are trying to secure it.

  If the opening / closing damper 6 is provided in addition to the air volume adjusting damper 5 in this way, the number of parts increases, and the cost of the spot air conditioner increases. Moreover, even if the opening degree is arbitrarily set by the air volume adjusting damper as described in Patent Document 1, the air volume adjusting damper may be fully opened or fully closed depending on the wind speed in the duct. Although the louver can be stopped at an arbitrary position in the device described in Patent Document 2, this air volume adjusting damper uses a worm gear and a pinion gear to realize this, and therefore the cost becomes high.

  Therefore, in the present invention, it is an opening degree adjusting device for adjusting the air volume connected to the opening of the ventilation duct, it is possible to set the opening degree with a simple structure, and the start of ventilation or An object of the present invention is to provide an opening adjustment device that can be easily shut off.

  The opening adjustment device of the present invention is an opening adjustment device connected to the opening of the ventilation duct, and is a cylinder, a plate-like valve element that rotates in the cylinder and blocks ventilation, And a stopper member that restrains the rotatable position of the valve body when the plate-shaped valve body is rotated to open the cylindrical body.

  The opening adjustment device of the present invention rotates the valve body, opens the cylindrical body to adjust the air volume, and provides the stopper member at the position where the air volume is adjusted. As a result, when the valve body is rotated and the cylinder body is opened, the rotatable position of the valve body is restrained by the stopper member, so that the cylinder body can be opened only to the position where the valve body is restrained. There is no pre-adjusted airflow. Further, when the valve body is rotated to close the cylinder body, there is no restriction by the stopper member, so the cylinder body is closed by the valve body and the ventilation is blocked.

  Here, the opening adjustment device has an arm that is connected to the rotating shaft of the valve body and is rotatably provided outside the cylinder, and the stopper member is arranged in the middle of the rotation position of the arm to rotate the arm. It is desirable that it is a member which restrains. Thereby, the valve body in the cylinder can be easily rotated by operating the arm outside the cylinder, and the rotation of the valve body in the cylinder can be performed by constraining the rotation position of the arm by the stopper member. Possible positions can be constrained.

  Further, it is desirable that the opening degree adjusting device has a plurality of mounting holes that determine positions where the stopper member is attached to restrain the rotation of the arm in the middle of the rotational position of the arm. As a result, the valve body in the cylinder can be easily rotated by operating the arm outside the cylinder, and the air volume can be adjusted from among the mounting holes when opening the cylinder and adjusting the air volume of the opening adjustment device. By selecting a mounting hole that can restrain the rotation of the arm at the position where the operation is performed, it is possible to easily determine the position where the valve body in the cylinder can be rotated.

  Furthermore, the opening adjustment device has a spring that connects the arm and the cylinder across the rotation center of the arm, and this spring closes the cylinder when the valve body is rotated to close the cylinder. When the arm is pulled and the valve body is rotated to open the cylinder, it is desirable that the arm is provided at a position where the arm is pulled in the direction to open the cylinder. As a result, the valve body is pulled in both the closing direction and the opening direction in both cases when the cylinder is closed and opened, thus preventing the valve body from operating freely due to the influence of wind flow. It becomes possible to do.

(1) A tubular body, a plate-shaped valve body that rotates in the tubular body to close the tubular body and blocks ventilation, and a valve body that rotates the plate-shaped valve body to open the tubular body By providing the stopper member that restrains the rotatable position, an opening degree adjusting device that can set the opening degree with a simple structure that determines the position of the stopper member is obtained. In addition, by simply opening and closing the opening adjustment device, a pre-adjusted airflow flows when the opening adjustment device is opened, and ventilation is interrupted when the opening adjustment device is closed. Thus, both functions of the air volume adjusting damper and the opening / closing damper can be exhibited.

(2) It has an arm connected to the rotating shaft of the valve body and provided rotatably on the outside of the cylinder, and the stopper member is a member arranged in the middle of the rotation position of the arm to restrain the rotation of the arm. Thus, the opening / closing operation of the opening degree adjusting device can be easily performed by operating the arm on the outer side of the cylindrical body.

(3) By attaching a stopper member in the middle of the rotation position of the arm and having a plurality of mounting holes for determining the position to restrain the rotation of the arm, when adjusting the air volume, the mounting hole is selected from the plurality of mounting holes. By selecting, the air volume can be easily adjusted.

(4) It has a spring that connects the arm and the cylinder across the rotation center of the arm, and this spring pulls the arm in the direction of closing the cylinder when the valve body is rotated and the cylinder is closed, When the valve body is rotated to open the cylinder body, it is provided at a position where the arm is pulled in the direction to open the cylinder body, thereby preventing the valve body from operating freely due to the influence of the wind flow. And the air volume can be stabilized.

  FIG. 1 is a schematic configuration diagram of a spot air-conditioning apparatus using an opening degree adjusting device according to an embodiment of the present invention. 2A is a configuration diagram of the air duct of FIG. 1, and FIG. 2B is a configuration diagram of a branch duct connected to the air duct. 3A and 3B are views showing the opening degree adjusting device of FIG. 1, wherein FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a left side view. FIG. 4 is a perspective view showing an open state of the opening adjustment device of FIG.

  The spot air conditioner shown in FIG. 1 has a blower duct 1 as a ventilation duct for sending conditioned air, a branch duct 2 connected to the blower duct 1, and an air volume adjustment and opening / closing connected to the tip of the branch duct 2. It is comprised from the opening degree adjusting device 3 provided with a mechanism, and the flexible nozzle 4 connected to the tip of the opening degree adjusting device 3. Air-conditioned air conditioned by an air conditioner (not shown) is spot-blowed from the flexible nozzle 4 at each worker through the air duct 1, the branch duct 2 and the opening adjustment device 3.

  As shown to Fig.2 (a), in order to send the ventilation duct 1 to the location which requires conditioned air from an air conditioner, it has a length of about 50 m, for example. Therefore, the air duct 1 has a constant pressure gradient from the air conditioner to the tip part farther away from the air conditioner, so that the duct diameter gradually decreases toward the tip and always ensures a constant amount of air blown out. ing. The conditioned air is distributed to a plurality of locations from a plurality of openings 10 provided in the air duct 1. As shown in FIG. 2B, the branch duct 2 is connected to each opening 10. The opening degree adjusting device 3 is provided at the tip of each branch duct 2 and in the immediate vicinity of the flexible nozzle 4.

  As shown in FIGS. 3 and 4, the opening degree adjusting device 3 includes a cylindrical tubular body 11, a disc-shaped valve body 12 that rotates in the tubular body 11 and constitutes a butterfly valve, a valve And an arm 14 that is connected to a rotation shaft 13 of the body 12 and is rotatably provided on the outer side of the cylinder 11. The rotating shaft 13 penetrates through the cylindrical body 11 and is supported by a receiving seat 15 provided in the cylindrical body 11. The rotating shaft 13 rotates with the rotation of the arm 14, and the valve body 12 rotates in synchronization with the arm 14.

  The receiving seat 15 is provided with a stopper bracket 17 for attaching a pin 16 as a stopper member that restrains the rotation of the arm 14. The stopper bracket 17 is provided with a plurality of mounting holes 18 for determining a position for restraining the rotation of the arm 14. The mounting hole 18 is disposed in the middle of the rotational position of the arm 14. The mounting holes 18 are preferably arranged in a staggered manner. When the rotation of the arm 14 is restricted by the pin 16 attached to the mounting hole 18, the rotatable position of the valve body 12 that rotates in synchronization with the arm 14 is restricted.

  A spring 19 is provided between the arm 14 and the receiving seat 15. The spring 19 connects the arm 14 and the cylindrical body 11 across the rotation center (rotating shaft 13) of the arm 14. The receiving seat 15 is provided with a spring mounting bracket 20. The arm 14 is provided with a spring mounting pin 21 on the opposite side of the rotary shaft 13 with respect to the spring mounting bracket 20. The spring 19 is mounted between the spring mounting bracket 20 and the spring mounting pin 21.

  Moreover, the strings 22 and 23 for rotating the arm 14 are provided at both ends of the arm 14, respectively. When the string 22 is pulled, the arm 14 rotates clockwise (in the direction in which the inside of the cylinder 11 is closed), and enters the “closed (SHUT)” state. When the above-mentioned spring 19 pulls the string 22 and rotates the arm 14 (valve body 12) in a direction to close the inside of the cylindrical body 11, the spring mounting pin 21 exceeds the dead point (dead point) and the valve body. Since it is located on the left side of the twelve rotation shafts 13, the arm 14 is pulled in a direction to close the inside of the cylinder 11.

  On the other hand, when the string 23 is pulled, the arm 14 rotates counterclockwise (the direction in which the inside of the cylinder 11 is opened), and is in an “OPEN” state. When the spring 19 pulls the string 23 and rotates the arm 14 (valve element 12) in a direction to open the inside of the cylinder 11, the spring mounting pin 21 exceeds the dead point (dead point) and the valve element 12 Therefore, the arm 14 is pulled in the direction in which the inside of the cylindrical body 11 is opened.

  The spring 19 has such a strong spring force that the valve body 12 does not rotate due to the air pressure of the conditioned air passing through the cylindrical body 11 when the arm 14 is in the “open” state. Therefore, when the arm 14 is in the “open” state, a strong impact is applied to the pin 16, so the pin 16 is firmly tightened to the stopper bracket 17, but when adjusting the air flow, the pin 16 can be easily loosened and removed. It has become.

Next, the operation of the opening adjustment device 3 having the above configuration will be described.
The opening degree adjusting device 3 in the present embodiment adjusts the air volume of each opening degree adjusting device 3 in advance during the initial test operation of the spot air conditioner, and fixes the pin 16 to the mounting hole 18 at an appropriate position. The air volume once adjusted is not moved except by the administrator, and the operator only operates the strings 23 and 24 of the opening adjustment device 3.

  The operator pulls the string 23 when the conditioned air is necessary, and sets the opening adjustment device 3 to the “open” state. 3 and 4 show a state in which the opening adjustment device 3 is “open”. At this time, the arm 14 is biased by the spring 19 in the direction in which the valve body 12 opens, but the arm 14 abuts on the pin 16 and is restrained. Therefore, the valve body 12 is not fully opened but is half open, and the opening adjustment device 3 allows only the conditioned air of the air volume set by the mounting position of the pin 16 to the mounting hole 18 to pass through. Thereby, the conditioned air of the air volume adjusted from the flexible nozzle 4 is blown out.

  Further, the operator pulls the string 22 when the air-conditioning air is unnecessary, and sets the opening adjustment device 3 in the “closed” state. At this time, the arm 14 rotates in the direction in which the valve body 12 is closed, and the valve body 12 is fully closed. As a result, the inside of the cylinder 11 is closed and the conditioned air is shut off, so that the conditioned air is not blown out from the flexible nozzle 4.

  As described above, the opening degree adjusting device 3 in the present embodiment can easily set the opening degree by determining the position of the pin 16 and only performs a simple opening / closing operation of pulling the strings 22 and 23. Thus, when the valve body 12 is opened, the conditioned air of the air volume adjusted in advance in each opening degree adjusting device 3 flows, and when the valve body 12 is closed, the conditioned air from each opening degree adjusting device 3 is supplied. Blocked. That is, the opening degree adjusting device 3 of this embodiment exhibits both functions of an air volume adjusting damper and an opening / closing damper.

  In addition, although the width of the actual set opening is performed in a narrow range of about 25 °, in the present embodiment, since the mounting holes 18 are arranged in a staggered manner, it is possible to perform fine air volume adjustment with a small width. Is possible. Further, in the opening degree adjusting device 3 in the present embodiment, once the air volume is adjusted, even if the valve body 12 is set to the “open” state, the valve body 12 is not fully opened and only the preset air volume is blown out. In the form in which the conditioned air is distributed to a plurality of places by the air duct as in the form, the opening degree set at the initial stage is not moved except by the administrator. Rather, it is possible to always ensure that a constant air volume is blown from any opening adjustment device 3 by not being moved by anyone other than the administrator.

  Moreover, the opening degree adjusting device 3 in this embodiment can also be used sideways (horizontal) as shown in FIG. As shown in FIG. 5, even if the opening degree adjusting device 3 in the present embodiment is used sideways, the other operations are the same except that the directions of the strings 22, 23 are changed by 90 degrees.

  Furthermore, in this embodiment, although the opening degree adjustment apparatus 3 as a blowing apparatus which is connected to the some opening part 10 of the ventilation duct 1 and blows off an air conditioned wind was demonstrated, this opening degree adjustment apparatus 3 is from several places. It can also be used as a suction port for exhaust air that sucks wind and discharges it to the ventilation duct.

  The opening degree adjusting device of the present invention is useful as a device for adjusting the air volume at the opening of the ventilation duct.

It is a schematic block diagram of the spot air conditioner using the opening degree adjustment apparatus in embodiment of this invention. (A) is a block diagram of the ventilation duct of FIG. 1, (b) is a block diagram of the branch duct connected to the ventilation duct. It is a figure which shows the opening degree adjustment apparatus of FIG. 1, Comprising: (a) is a top view, (b) is a front view, (c) is a left view. It is a perspective view which shows the open state of the opening degree adjustment apparatus of FIG. It is a figure which shows the state which used the opening degree adjustment apparatus in this embodiment sideways (horizontal). It is a schematic block diagram of the conventional spot air conditioner. It is an enlarged view of an air volume adjustment damper and an opening / closing damper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air duct 2 Branching duct 3 Opening adjustment apparatus 4 Flexible nozzle 10 Opening part 11 Tubular body 12 Valve body 13 Rotating shaft 14 Arm 15 Receiving seat 16 Pin 17 Stopper bracket 18 Mounting hole 19 Spring 20 Spring mounting bracket 21 Spring mounting Pins for pin 22, 23

Claims (1)

A branch duct is connected to each of a plurality of openings provided in a ventilation duct for sending conditioned air conditioned by an air conditioner, and the conditioned air is sprayed in a spot where a worker who needs the conditioned air is present. An opening adjustment device used in a spot air conditioner and connected to the tip of the branch duct ,
A cylinder,
A plate-like valve body that rotates in this cylinder and blocks ventilation,
An arm connected to the rotating shaft of the plate-like valve body and provided rotatably on the outside of the cylindrical body;
A plurality of mounting holes that are arranged in the middle of the rotational position of the arm and determine a position to restrain the rotation of the arm;
The valve body that is detachably mounted in any one of the plurality of mounting holes and rotates in synchronization with the arm by restraining the rotation of the arm when the valve body is rotated to open the cylindrical body A pin that restrains the rotatable position of
A spring that connects the arm and the cylinder across the rotation center of the arm; when the valve body is rotated to close the cylinder, the arm is pulled in a direction to close the cylinder; by rotating the body have a spring provided in a position to pull the arm in the direction of opening the cylinder body when opening the cylinder body,
The valve body is urged by the spring to either a position where the cylinder is closed or a position where rotation is restricted by the pin in accordance with the operation of the arm. Degree adjustment device.

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