JPS6024964Y2 - Air pressure adjustment device that allows adjustment of actuator operating position - Google Patents

Description

[Detailed description of the invention] This invention allows the actuator that operates the switching damper mainly installed in the air conditioner to be stopped not only at both moving ends but also at an intermediate position, and furthermore, the intermediate position can be adjusted. This invention relates to an air pressure adjustment device.

The actuator of the current switching damper introduces negative pressure or atmospheric pressure into the chambers on both sides of the diaphragm, moves a rod fixed to the diaphragm, and the damper is switched by the movement of the rod.

However, with this current device, it is not possible to adjust the connection position between the damper and the rod, and therefore, errors in the mounting position of the actuator, errors in assembling the damper, etc. may result in incomplete damper operation, resulting in air leakage, etc. There were cases where problems occurred.

Therefore, this invention provides an air pressure adjustment device that adjusts and applies supply air (negative pressure) to a single-stage actuator so that the operating position of the actuator can be adjusted. In addition to being able to stop the actuator, the actuator is provided at a separate position, and by adjusting this device, the intermediate stop position of the actuator can be arbitrarily adjusted.

Next, an embodiment of this invention will be described with reference to the drawings.

In FIG. 1, a diaphragm 2 is disposed within a main body 1, and chambers 3.4 are formed on both sides of the diaphragm 2.

An input port 6 through which negative pressure or atmospheric pressure is supplied to the chamber 3 via a passage 5 is screwed into the main body 1 .

The input port 6 is a pipe-shaped member 6a with a screw 7 carved on its outer periphery, and by loosening a lock nut 8 and rotating the input port 6, the screwing position of the main body 1 can be adjusted.

The chamber 3 is also provided with an output port 9, which is connected to an actuator 11 via a passage 10.

The actuator 11 is composed of a diaphragm 12, a rod 13 connected to the diaphragm 12, and a spring 14, and the rod 13 is displaced against the spring 14 by atmospheric pressure (negative pressure) supplied into a chamber 15.

The diaphragm 2 is pressed by a spring 16 disposed within the chamber 3, and has a hole 17 formed in its center, into which a valve 18b of a movable valve 18 is engaged as described below.

The movable valve 18 is provided with a valve 18a and a valve 18b at the upper and lower ends, with the upper valve 18a facing the opening of the input port 6,
The opening and closing of this opening is controlled, and the lower valve 18b is engaged with the hole 17 of the diaphragm 2, and the spring 19
The lower valve 18b is biased to close the hole 17.

An input port 21 - through which negative pressure or atmospheric pressure is supplied to the chamber 4 through a passage 20 is provided in the main body 1 .

This passage 20 and the passage 5 are connected via changeover valves 22 and 23 to the atmosphere or to the negative pressure side, respectively.

24 is a negative pressure source. An example of the operation of this invention in the above configuration will be explained.

Now, when switching valves 22 and 23 to communicate with the atmosphere, the atmosphere is guided into chambers 3 and 4, both chambers 3 and 4 have atmospheric pressure, diaphragm 2 does not move, and atmospheric pressure in chamber 3. is sent from the output port 9 into the chamber 15 of the actuator 11, and
5 is assumed to be atmospheric pressure.

Therefore, the diaphragm 12 is moved upward by the spring 14 to the position shown by the solid line, and the exposed length of the rod 13 is maximized.

The diaphragm 2 and the movable valve 18 in the main body 1 are in the illustrated state, and the input port 6 is open.

Next, when the switching valves 22 and 23 are switched to communicate with the negative pressure side, negative pressure is introduced into the chambers 53 and 4, and both chambers 3 and 4 become negative pressure, and the diaphragm 2 does not move and the inside of the chamber 3. Negative pressure is sent from the output port 9 to the actuator 11 via the passage 10,
The inside of the chamber 15 is made negative pressure.

Therefore, the diaphragm 2 is sucked downward against the spring 14 and moved to the position shown by the two-dot chain line in FIG. 1, and the exposed length of the rod 13 becomes the minimum.

Note that since negative pressure is supplied to both the chambers 3 and 4, the diaphragm 2 is inactive, the movable valve 18 is also inactive, and the input port 6 is open.

Furthermore, as shown in FIG. 2, when the switching valve 23 is switched to the negative pressure side and the switching valve 22 is switched to the atmospheric side, the negative pressure enters the chamber 3 through the input port 6, making the interior of the chamber 3 a negative pressure. , the diaphragm 2 is displaced upward against the spring 16.

Therefore, the movable valve 18 is moved upward, and when the desired negative pressure value is reached, the valve 18a comes into contact with the opening of the input port 6 and is closed, so that the negative pressure value in the chamber 3 is kept constant.

This negative pressure in the chamber 3 is guided to the actuator 11, and the actuator 11 is moved downward to the state shown in the figure.

The amount of movement is an intermediate position between both moving ends.

When the negative pressure value in the chamber 3 increases, the diaphragm 2 is displaced upward against the spring 16, so that the hole 17 is opened.
In order to introduce atmospheric air, an increase in the negative pressure within the chamber 3 is suppressed, and when the negative pressure within the chamber 3 decreases, the diaphragm 2 is pressed by the spring 16 and is displaced downward, opening the input port 6.

Therefore, negative pressure is supplied into the chamber 3, suppressing a decrease in the negative pressure, and keeping the negative pressure in the chamber 3 constant, thereby maintaining a stable balanced state.

Changes in the negative pressure (air pressure) in the chamber 3, ie, adjustment of the intermediate stop position of the actuator, can be performed by providing an input port 6 and rotating a pipe-shaped member 6a.

When the pipe-shaped member 6a is moved upward, the negative pressure value increases, and when it is moved downward, the negative pressure value becomes weaker.

Therefore, by adjusting this appropriately, the supplied negative pressure can be adjusted, and the intermediate stop position of the actuator can be adjusted by a desired amount.

Therefore, when implemented in an air conditioner, by appropriately adjusting the opening degree of the damper for each device, the operation of the damper can be ensured and problems such as air leakage can be prevented.

In this way, this invention allows the actuator to be stopped at an intermediate position, and furthermore, the position at which the intermediate stop position is provided in the main body can be adjusted by rotating the pipe-shaped member that constitutes the input port. When implemented in an air conditioner, the operating position of the damper can be adjusted by adjustment, and the reliability of operation can be improved.

[Brief explanation of the drawing]

FIG. 1 shows a schematic diagram of the constituent countries of this invention, and FIG. 2 shows the constituent countries showing the operating state of the same. 1...Body, 2...Diaphragm, 3
, 4... Room, 6... Input port, 9...
... Output port, 11 ... Actuator, 17
...... Hole formed in diaphragm 2, 18...
...Movable valve, 21...Input port.

Claims (1)

[Scope of utility model registration request] Two chambers 3.4 are provided in the main body 1 via the diaphragm 2, and one of the chambers 3 has an input port 6 to which negative pressure or atmospheric pressure is supplied by the switching operation of the switching valve 23, and an input port 6 to which the actuator 1 is supplied.
1 is provided with an output port 9 for connection, and the other chamber 4 is provided with an input port 21 to which negative pressure or atmospheric pressure is supplied by the switching operation of the switching valve 22, and the input port 6 is a pipe-shaped member. The valve 18a at one end of the movable valve 18 is connected to the input port 6.
The movable valve 18 is connected to the diaphragm 2 by urging the other end valve 18b with a spring 19 so as to close the hole 19 formed in the diaphragm 2, and the switching valve 22, 23 is connected to the opening of the diaphragm 2. When switching to atmospheric pressure or negative pressure, respectively, the diaphragm 2 does not move, atmospheric pressure or negative pressure is supplied to the actuator 11, the exposed length of the rod 13 is controlled to the maximum or minimum position, and the switching valve 23 is switched to the negative pressure. When the switching valve 22 is switched to the pressure side and the switching valve 22 is switched to the atmosphere side, the diaphragm 2 is displaced and the valve 18a closes the input port 6 when the inside of the chamber 3 reaches a desired negative pressure value, thereby increasing the exposed length of the rod 13 of the actuator 11. An air pressure adjustment device in which the operating position of an actuator is adjustable, characterized in that the operating position of an actuator is controlled to an intermediate position.