JP2019066125A - Differential pressure damper device - Google Patents

Abstract

To provide a differential pressure damper device capable of making a damper blade body transit to an open state even with a minute pressure difference by suppressing an influence by a blade weight by linearly moving the damper blade body between a close state and the open state.SOLUTION: A damper blade body 20 capable of closing a damper frame body 10 in which a gas can pass through a hollow part inside, is movably supported by a supporting mechanism portion 30, and the supporting mechanism portion 30 applies a link mechanism for longitudinally moving the damper blade body 20 at a front side of the damper frame body 10. When force added to the damper blade body 20 in accompany with pressure difference between one space 60 and the other space 70, is more than force to bring the damper blade body 20 into a close state, the damper blade body 20 is substantially linearly moved forward, thus the damper blade body 20 is moved while minimizing an influence of a weight of the damper blade body 20 and the like, and the damper blade body 20 is moved to transit to an open state even when the pressure difference between two spaces is small.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a differential pressure damper device that is disposed on a wall that separates two spaces and that reduces the pressure difference between the two spaces to a predetermined range.

  As part of the air conditioning equipment, it is disposed on a wall or the like that divides two spaces, and when the gas pressure in one space exceeds the set value and becomes higher than the other space, the open state based on the pressure difference A differential pressure damper that discharges a high relative pressure gas from one space to the other space to reduce the pressure difference and maintain the pressure in one space substantially constant while preventing the backflow of the gas from the other space Various devices are conventionally used depending on the application. Among them, the parallel crank mechanism is used to support the damper blade, and the direction of the damper blade is always parallel to the damper frame opening surface, and the opening between the damper frame and the damper blade is all around the blade. It has been proposed by the present applicant that the structure is simplified while ensuring a wide range. An example of this differential pressure damper device is shown in JP-A-2005-257136.

JP 2005-257136 A

  The conventional differential pressure damper device is configured as shown in the above-mentioned patent document, and has a feature that cost reduction can be achieved by simplification of the structure, and the required dimension in the thickness direction of the device can be suppressed. .

  However, since the conventional differential pressure damper device is configured to be in the open state by tilting upward from the state where the damper blade body closes the opening of the damper frame, the closing side is based on the weight of the damper blade body. In a situation in which the force applied in the direction to move to is relatively large, and the pressure difference between the two spaces separated by the device is small, the force to move the damper blade is insufficient to open it. The problem was that the pressure difference could not be alleviated.

  In such a conventional mechanism, in order to make it possible to open even if the pressure difference is small, a weight may be attached to the damper blade or the arm so that the force for moving the damper blade toward the closing side is weakened. In that case, when the pressure difference disappears, a situation may occur where the damper blade can not smoothly return from the open state to the closed state, or the damper blade can not closely contact the damper frame even in the closed state. There has been a problem that a gap may be generated between the body and the damper frame, which may cause an undesirable flow of gas, such as backflow of gas.

  The present invention has been made to solve the above problems, and the damper blade is moved linearly between the closed state and the open state to suppress the influence of the weight of the blade, and the pressure of the damper blade is slight. An object of the present invention is to provide a differential pressure damper device that can shift to an open state even with a difference and appropriately control and eliminate a pressure difference.

  The differential pressure damper device according to the present invention has at least a hollow substantially cylindrical portion through which the gas passes inside, and a damper frame which is disposed by being fitted into a hole provided in the wall, and the damper frame A damper blade body formed of a substantially plate-like body of a size capable of closing a hollow portion of the body and disposed on the other space side of the damper frame, and a part of which is a stationary node, inside the damper frame And a support mechanism portion attached to the peripheral surface, the other portion attached to the damper blade, and movably supporting the damper blade on the front side of the damper frame, the support mechanism being the damper frame A first guide rail section erected with an end attached to the peripheral surface of the body, and a second guide mounted on the surface of the damper blade near the damper frame with the longitudinal direction aligned with the vertical direction of the damper blade Guide rails and one end of the guide rails A first link member pivotally attached to the upper part and having the other end vertically and movably attached to the second guide rail, and one end vertically moved to the first guide rail And a second link member pivotally attached at the other end thereof to the upper portion of the second guide rail portion, and having a second predetermined position in the middle of the first link member. And an intermediate predetermined position in the second link member intersecting the intermediate predetermined position are connected swingably to each other.

  As described above, according to the present invention, the damper blade that can close the damper frame that can pass the gas through the inner hollow portion is movably supported by the support mechanism portion, and the support mechanism portion Is a link mechanism having a predetermined degree of freedom for moving the damper blade back and forth on the front side of the damper frame, and from one space to the damper blade with a pressure difference between one space and the other space When the applied gas pressure exceeds the force to close the damper blade, the damper blade moves in the front-rear direction with little change in the direction with respect to the damper frame, thereby opening the damper frame As a result, the opening between the damper frame and the damper blade can be largely secured around the entire blade, facilitating the passage of air flow between the damper frame and the damper blade, and efficiently enabling a large amount of gas From the space of Is moved into the space, it can be adjusted quickly to the set pressure internal pressure difference between the two spaces. In addition, by moving the damper blade substantially linearly in the front-rear direction, the damper blade is less susceptible to the weight of the damper blade or the support mechanism when moving the damper blade forward, and the space between the two spaces is Even when the pressure difference is small, the damper blade can be moved forward to bring the damper frame into the open state.

  Further, the differential pressure damper device according to the present invention comprises a weight portion which is detachably disposed at one end portion of the second link member in the support mechanism portion, as needed.

  As described above, according to the present invention, the weight portion is disposed at one end portion of the second link member in the support mechanism portion, and the one end portion of the second link member vertically moved relative to the first guide rail portion The load of the weight portion exerts a downward force to lower one end of the second link member so that the support mechanism is contracted in the front-rear direction of the damper frame, and the damper blade is disposed on one space side It is possible to apply a force to move the damper blade, change the mounting amount of the weight part, and adjust appropriately the sensitivity to the pressure difference in the movement for opening the damper frame of the damper blade, and one space side of the damper blade When the pressure difference disappears, it is possible to swiftly return to the closed state, and move the damper blade to one space side even when the damper blade is in contact with the damper frame. Create the power to The damper blade member is brought into close contact with the damper frame, thus allowing inhibition of unwanted open due to causes other than the pressure difference occurs.

It is a front view of a differential pressure damper device concerning a 1st embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the differential pressure damper device according to the first embodiment of the present invention in the closed state. It is a second link member one end portion attachment state explanatory view to the first guide rail portion in the support mechanism portion of the differential pressure damper device according to the first embodiment of the present invention. It is the first link member other end attaching state explanatory view to the 2nd guide rail part in the support mechanism part of the differential pressure damper device concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional view in the open | release start state of the differential pressure damper apparatus which concerns on the 1st Embodiment of this invention. It is a longitudinal cross-sectional view in the open state at the time of the 1st passage flow rate of the differential pressure damper device concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional view in the open state at the time of the 2nd passage flow of the differential pressure damper device concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional view in the open state at the time of the 3rd passage flow rate of the differential pressure damper device concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional view in the closed state of the differential pressure damper device which concerns on the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view in the open | release start state of the differential pressure damper apparatus which concerns on the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view in the open state at the time of the 1st passage flow rate of the differential pressure damper device concerning a 2nd embodiment of the present invention. It is a longitudinal cross-sectional view in the open state at the time of the 2nd passing flow rate of the differential pressure damper device concerning a 2nd embodiment of the present invention. It is a longitudinal cross-sectional view in the open state at the time of the 3rd passage flow rate of the differential pressure damper device concerning a 2nd embodiment of the present invention. It is a longitudinal cross-sectional view in the closed state of the differential pressure damper device which concerns on the 3rd Embodiment of this invention. It is a longitudinal cross-sectional view in the open start state of the differential pressure damper device concerning a 3rd embodiment of the present invention. It is a longitudinal cross-sectional view in the open state at the time of the 1st passage flow rate of the differential pressure damper device concerning a 3rd embodiment of the present invention. It is a longitudinal cross-sectional view in the open state at the time of the 2nd passage flow of the differential pressure damper device concerning a 3rd embodiment of the present invention. It is a longitudinal cross-sectional view in the open state at the time of the 3rd passage flow of the differential pressure damper device concerning a 3rd embodiment of the present invention.

First Embodiment of the Present Invention
Hereinafter, a differential pressure damper device according to a first embodiment of the present invention will be described based on FIGS. 1 to 8.
In each of the drawings, the differential pressure damper device 1 according to the present embodiment includes a rectangular frame-shaped damper frame 10 disposed at a predetermined position of the wall 50 separating the two spaces 60 and 70, and the damper frame 10. The damper blade 20 is disposed on the side of the space 70 to open and close the opening of the damper frame 10, and a part thereof is attached to the inner peripheral surface of the damper frame 10, and the other part is attached to the damper blade 20 The support mechanism 30 supports the damper blade 20 movably with respect to the damper frame 10, and the weight 40 is attached to a predetermined position of the support mechanism 30.

  The damper frame 10 is formed of a frame-like body having a rectangular cross-sectional shape and a hollow cylindrical portion, and is configured to be fitted into a hole provided in a wall 50 separating the two spaces 60 and 70. The pressure difference between one space 60 on the high pressure side and the other space 70 on the low pressure side reaches a level that exceeds the set pressure, and the damper blade 20 pushed toward the space 70 based on the pressure difference is in the open state In the inner portion of the frame, air is allowed to pass from one space 60 to the other space 70 side. A packing 11 made of an elastic material is disposed on the surface of the damper frame 10 in contact with the damper blade 20 so as to eliminate a minute gap between the two members at the time of contact.

  The damper blade 20 is a rectangular substantially plate-like body having a size capable of closing the opening of the damper frame 10 facing the other space 70 and having a central portion protruding in a convex manner. is there. The damper blade 20 is attached to the damper frame 10 via the support mechanism 30, and is disposed at the other end close to the space 70 of the damper frame 10 with the protruding side directed to the other space 70 side. It will be set up. When the damper blade 20 abuts against the damper frame 10 to close the opening of the damper frame 10, the damper blade 20 is arranged such that the center thereof coincides with the center of the damper frame 10. The back surface of the damper blade 20, that is, the surface facing the one space 60, is configured to have a concave shape opposite to the convex shape on the opposite side.

  The damper blade 20 is movably supported relative to the damper frame 10 via the support mechanism 30. Specifically, assuming that the direction from one space 60 to the other space 70 is the forward direction and the opposite direction is the backward direction, the damper blade 20 faces the other space 70 of the damper frame 10. The front predetermined range can be moved back and forth on the basis of the position where it is closed.

  When the pressure difference between the two spaces 60 and 70 is large, the damper blade 20 receives the gas pressure from the one space 60 side, and from the contact state with the damper frame 10 forward, that is, the other space The damper of the gas in the space 60 while opening and closing the damper frame 10 opening according to the pressure difference between the two spaces 60 and 70, such as moving back to the 70 side, and retreating and returning to the original state when the pressure difference decreases. It is a mechanism which allows the outflow to the other space 70 side through the inside of the frame 10.

  The support mechanism portion 30 is attached to the inner peripheral surface of the damper frame 10 with a portion as a stationary node, and the other portion is attached to the damper blade 20, and the damper blade 20 is in front of the opening of the damper frame 10 It supports movably substantially linearly on the side.

  In detail, the support mechanism portion 30 makes the longitudinal direction coincide with the vertical direction of the damper blade 20, with the first guide rail portion 31 erected with its end attached to the inner peripheral surface of the damper frame 10. A second guide rail portion 32 attached to the surface of the damper blade 20 closer to the damper frame 10, and one end portion is swingably attached to the upper portion of the first guide rail portion 31 and the other end portion The first link member 33 is vertically and movably attached to the second guide rail portion 32, and one end thereof is movably and pivotally attached to the first guide rail portion 31 and the other And a second link member 34 swingably attached to an upper portion of the second guide rail portion 32.

  The first guide rail portion 31 has its both ends attached to the upper and lower surfaces of the inner periphery of the damper frame 10, and is an elongated rectangular frame member installed between the inner peripheral surfaces in a configuration vertically cutting the inside of the frame. The upper end side is located forward of the lower end side (the other space 70 side), and is slightly inclined forward. One end of the second link member 34 is slidably engaged with the first guide rail portion 31 in the vertical direction.

  The second guide rail portion 32 has its longitudinal direction aligned with the vertical direction of the damper blade 20 at the rear surface of the damper blade 20, that is, the approximate center of the surface close to the damper frame 10 facing the one space 60 side. It is an elongated rectangular frame-like member to be attached. An elongated hole-shaped guide portion 32 a is provided in a predetermined range below the second guide rail portion 32 so that the other end portion of the first link member 33 is slidably and swingably engaged in the vertical direction.

  The first link member 33 has a main body 33a formed of an elongated rectangular frame and a shaft 33b provided at an end of the main body 33a in the longitudinal direction, and the shaft in the main body 33a One end, which is the side without 33b, is swingably attached to the upper part of the first guide rail 31, and the other end with the shaft 33b is the shaft 33b in the second guide rail 32. By engaging with the guide portion 32a, the second guide rail portion 32 is mounted so as to be vertically movable and pivotable.

  The second link member 34 has a main body portion 34a formed of an elongated rectangular frame-like member, and a sliding portion 34b swingably provided at one end of the main body portion 34a in the longitudinal direction. The slide portion 34b at one end of the main body portion 34a is slidably engaged with a plate-like portion on the front side (the other space 70 side) of the first guide rail portion 31, whereby the one end is made the first The guide rail portion 31 is vertically movably and swingably attached, and the other end portion is swingably attached to the upper end portion of the second guide rail portion 32.

  About the first link member 33 and the second link member 34, a main portion of the second link member 34 which intersects a predetermined intermediate portion of the main body portion 33a of the first link member 33 and the intermediate predetermined portion It is a mechanism in which the middle predetermined place in 34a is connected mutually rockably.

  Thus, the support mechanism portion 30 having the first guide rail portion 31, the second guide rail portion 32, the first link member 33, and the second link member 34 is a first guide rail portion. An expandable and contractible four-node link mechanism is provided as a variable distance between the second guide rail portion 31 and the second guide rail portion 32.

  In this support mechanism portion 30, the length of the second guide rail portion 32 is reduced in correspondence with the concave shape on the back surface of the damper blade 20 with respect to the first guide rail portion 31 on the damper frame 10 side. In addition to the fact that the upper and lower link members 33 and 34 are not equal-length links in which their intermediate connection point is not located at 1/2 of the length of each link member, two guide rail portions Since 31 and 32 are not parallel, the damper blade 20 can be moved back and forth substantially linearly in front of the opening of the damper frame 10 although it does not constitute a strict linear motion mechanism.

  In detail, since the length from the intermediate connection point of each link member 33, 34 to each end is different, the damper blade 20 is moved to the upper side gradually while moving forward. By making the first guide rail portion 31 slightly inclined forward, the amount of upward movement of the damper blade 20 is relatively suppressed. However, as the first guide rail portion 31 is inclined forward, this and the second guide rail portion 32, strictly speaking, the sliding direction of the one end portion of the second link member 34 and the first link member 33 The sliding direction of the other end is not parallel, and as the damper blade 20 moves forward and increases the degree of opening, the lower portion of the damper blade 20 moves slightly forward than the upper portion, and the damper blade 20 The whole has a mechanism to tilt slightly backwards.

  However, the damper blade 20 can be considered to move linearly at least in the vicinity of the damper frame 10, and is less susceptible to the weight of the damper blade 20 or the support mechanism 30 when moving the damper blade 20 forward, Even when the pressure difference between the two spaces is small, the damper blade 20 can be moved forward to bring the damper frame 10 into the open state.

The weight portion 40 is detachably attached to one end of the main body portion 34 a of the second link member 34.
The weight portion 40 is positioned closer to the other space 70 than the central position of the swing of the second link member 34 with respect to the first guide rail portion 31, and the weight portion 40 is around the swing center of the second link member 34. While generating a rotational moment for swinging the second link member 34 downward, it acts as a load for the upward sliding of the one end of the second link member 34 with respect to the first guide rail portion 31. I am trying to do it. The sensitivity of the movement of the damper blade 20 to the pressure difference can be adjusted by changing the attachment amount (total weight) of the weight portion 40.

  In the combination of the weight 40 and the second link member 34, the second link member 34 is urged to lower its one end relative to the first guide rail 31. Accordingly, even when the damper blade 20 is in contact with the damper frame 10, the support mechanism 30 is contracted toward the one space 60 which is the closing direction. It is a mechanism to which the power to move is added. As a result, the damper blade 20 is brought into close contact with the damper frame 10, and the damper blade 20 can be prevented from being open due to reasons other than the pressure difference.

Next, the operating state of the differential pressure damper device based on the above configuration will be described.
When the pressure difference between the two spaces 60, 70 separated by the wall 50 to which the differential pressure damper device is attached exceeds the set pressure, the lower ends of the intersecting link members of the support mechanism 30 are respectively directed to the guide rail With respect to the closing force for pressing the damper blade 20 against the damper frame 10 based on the load that is added in the lowering direction and tries to reduce the amount of extension in the opening front direction of each link member, the damper The pressure of the gas in one space 60 pushes the blade 20 toward the other space 70 side, and the damper blade 20 pushed by the gas pressure is placed on the front side of the opening of the damper frame 10 as the damper blade 20. The movement is started with the movement of each part of the support mechanism 30 while maintaining the direction of (1) substantially, and a uniform gap is generated between the damper frame 10 and the damper blade 20 (see FIG. 5).

  Then, the damper blade 20 which is subsequently pushed by the gas pressure of one of the spaces 60 proceeds forward as it is with respect to the damper frame 10 to increase the distance between the damper frame 10 and the damper frame 10 and the damper blade An open state in which an opening is made between 20 is obtained (see FIGS. 6, 7 and 8).

  In the open state, the gas in the space 60 having a higher pressure enters the damper frame 10, flows between the damper frame 10 and the damper blade 20, and flows out to the space 70. When the damper blade 20 is opened, the opening between the damper frame 10 and the damper blade 20 is secured around the entire damper blade, and the distance between the damper frame 10 and the damper blade 20 is approximately equal. This facilitates the passage of the air flow between the damper frame 10 and the damper blade 20, and a large pressure difference causes a large amount of gas to move from one space 60 to the other space 70. It can be made to flow into the other space efficiently.

  When the damper blade 20 moves from the state closing the damper frame 10 to the open side, the link mechanism of the support mechanism 30 causes the damper blade 20 to be affected by the weight of the blade itself and the support mechanism 30. The damper blade 20 is moved almost linearly with respect to the damper frame 10 with almost no load, so even if the force to move the damper blade 20 to the open side based on the pressure difference is small, the damper blade 20 can be moved, and even if the pressure difference is small, the gas can be moved to the other space side by opening.

  In the open state, of the air flow from the one space 60 side to the other space 70 side, the air flow that strikes the back surface of the damper blade 20 is received by the concave surface forming the back surface and guided to the outer peripheral side. Dynamic pressure from the damper blade can be effectively used for forward movement of the damper blade 20, and the damper blade 20 can be smoothly moved to the other space side to make the opening between the damper frame 10 and the damper blade 20 I can secure enough.

  On the other hand, when the pressure difference between the two spaces falls below the set pressure due to the outflow of air from the space 60 on the high pressure side to the space 70 on the low pressure side, the closing force tries to move the damper blade 20 closer to the damper frame 10 However, the pressure of the gas of one space 60 pushing the damper blade 20 toward the other space 70 side will be exceeded. Along with this, the damper blade 20 retracts and moves toward the damper frame 10 with the movement of the support mechanism 30.

  Then, the damper blade 20 continues moving with the movement of the support mechanism 30 while keeping the direction to the damper frame 10 constant, and finally contacts the damper frame 10 to close the opening again Space 60, 70 are separated.

  When the damper blade 20 is in contact with the damper frame 10 from the vicinity of the damper frame 10 to close it in response to the pressure change of the gas, or conversely, the damper blade 20 is opened from the state of closing the damper frame 10 When the movement to the side is started, the damper blade 20 is moved linearly with respect to the damper frame 10 by the link mechanism of the support mechanism 30, so the damper blade 20 and the damper frame 10 are The damper blade 20 can be uniformly separated and approached with respect to the packing 11 maintaining air tightness between them, and the damper blade 20 does not rub on the surface of the packing 11 so that abrasion of the surface of the packing 11 does not easily occur. Thus, the deterioration of the elastic material can be suppressed, and the airtight holding function of the packing 11 can be properly maintained.

  In a state where the damper blade 20 blocks the open end of the damper frame 10, the load applied in the direction to lower the lower end of each link member 33, 34 of the support mechanism 30 relative to the guide rails 31, 32 respectively. In the damper blade 20, the pressure of the space 60 against the space 70 is reduced by reducing the amount of extension of the support mechanism portion 30 in the front-rear direction and pressing the damper blade 20 against the damper frame 10. As long as the pressure does not exceed the set pressure, it does not open freely or vibrate when contacting.

  In addition, even when the pressure in the other space 70 is higher than the space 60 due to a sudden change in pressure, and the backflow easily occurs, when the damper blade 20 is closed, the damper blade 20 from the other space 70 side The air flow pushing the body 20 flows along the projecting shape of the damper blade 20 and leaves the outer periphery as it is in the extension direction, and the air flow does not easily flow into the opening between the damper frame 10 and the damper blade 20 There is very little risk that backflow of gas will occur before the damper blade 20 is in the closed state.

  When adjusting the set pressure at which the damper blade 20 moves and is in the open state, the amount of attaching each weight 41 of the weight portion 40 to the second link member 34 is changed, and The magnitude of the force to lower the lower end portion of the second link member 34 with respect to the guide rail portion 31 is adjusted.

  In this case, as the load of the weight portion 40 is smaller, the end of the second link member 34 is lowered to reduce the amount of extension of the support mechanism 30 in the front-rear direction and move the damper blade 20 toward the damper frame 10 The resistance (reaction force) against the force to move the damper blade 20 to the open side is reduced. That is, the set pressure at the time of opening becomes a lower value. Thus, by adjusting the weight portion 40, the set pressure at the time of opening when the movement of the damper blade 20 starts can be easily changed.

  Moreover, the positional relationship of the weight 40 with respect to the swing center position of the end of the second link member 34 can be changed as necessary, and the degree of influence of the load of the weight 40 on opening and closing of the damper blade 20 can be adjusted. . For example, when the weight 40 is positioned closer to one space 60 than the swing center position of the end of the second link member 34, one end (upper end) of the second link 34 is the first The same weight moves closer to the other space 70 than the swing center position, as the movement of lowering the lower end of the second link member 34 by swinging in the direction toward the guide rail 31 and simultaneously lowering the lower end of the second link member 34 The force to move the damper blade 20 toward the damper frame 10 by reducing the amount of extension of the support mechanism 30 in the front-rear direction is larger than when it is located in .

  As described above, in the differential pressure damper device according to the present embodiment, the damper blade body 20 which can close the damper frame body 10 through which the gas can pass through the inner hollow portion is the support mechanism portion 30. The support mechanism portion 30 is movably supported, and forms a link mechanism having a predetermined degree of freedom for moving the damper blade 20 back and forth on the front side of the damper frame 10, and one space 60 and the other space 70 When the gas pressure applied to the damper blade 20 from one of the spaces 60 exceeds the force for closing the damper blade 20 in accordance with the pressure difference of the damper blade 20, the direction of the damper blade 20 with respect to the damper frame 10 is Because the damper frame 10 is in the open state by moving in the front-rear direction with almost no change in the size, a large gap between the damper frame 10 and the damper blade 20 can be secured around the entire blade body. By facilitating the passage of the air flow between the body 10 and the damper blade 20, a large amount of gas can be efficiently moved from one space 60 to the other space 70, and the pressure difference between the two spaces can be swiftly set within the set pressure. Can be adjusted. Further, by moving the damper blade 20 substantially linearly in the front-rear direction, the damper blade 20 is less susceptible to the weight of the damper blade 20 or the support mechanism portion 30 when moving the damper blade 20 forward. Even when the pressure difference between the spaces is small, the damper blade 20 can be moved forward to bring the damper frame 10 into the open state.

Second Embodiment of the Present Invention
In the differential pressure damper device according to the first embodiment, the first guide rail portion 31 of the support mechanism portion 30 is attached to the damper frame 10 in a forwardly inclined state, while the second guide rail portion 32 is a damper blade. In the closed state of the body 20, the guide rail portions 31, 32 are not arranged parallel to each other so as to be parallel to the opening surface of the damper frame 10, but in addition to this, as the second embodiment, The guide rails 31, 32 of the mechanism 30 are disposed parallel to each other. More specifically, as shown in FIGS. 9 to 13, the slide of the one end of the second link member 34 in the first guide rail 31 is performed. The second moving direction and the sliding direction of the other end of the first link member 33 in the second guide rail portion 32 are disposed parallel to each other, and the damper blade 20 is moved forward and backward. Guide rail 32 and the It can be configured to as not to change the orientation of the path sail body 20. In this case, the openings between the damper frame 10 and the damper blade 20 can be secured with equal size around the entire damper blade, and from one space 60 to the other space 70 without resistance through the entire circumference of the damper blade 20 It is made to progress smoothly.

Third Embodiment of the Present Invention
In the differential pressure damper device according to the first embodiment, the support mechanism unit 30 is configured such that the damper blade 20 is moved forward by making the lengths from the connection location of the link members 33 and 34 to each end different. The link mechanism is configured to shift slightly upward as it moves, but in the third embodiment, as shown in FIG. 14 to FIG. 18, each link member 33, 34 of the support mechanism portion 30. It is also possible to make equal the length before and behind the connection position of. In this case, the damper blade 20 can be accurately and linearly moved back and forth, and the gas pressure applied to the damper blade 20 due to the pressure difference can be effectively used to move the damper blade 20 and move the gas even with a small pressure difference. As a result, the pressure difference can be eliminated.

REFERENCE SIGNS LIST 1 differential pressure damper device 10 damper frame 11 packing 20 damper blade 30 support mechanism 31, 32 guide rail 33, 34 link member 33 a, 34 a body 33 b shaft 34 b sliding 40 weight 41 weight 50 wall 60 , 70 space

Claims (2)

It is disposed on a wall separating two adjacent spaces, and when the pressure difference with respect to the other space of one space is less than a predetermined set value, the pressure difference is in a closed state in which both spaces are not communicated. In the differential pressure damper device, in the case where the pressure exceeds the set value, the space is opened to communicate the two spaces, and the movement of the gas from the one space to the other space is permitted,
A damper frame which has at least a hollow substantially cylindrical portion through which the gas passes and which is disposed so as to be fitted in a hole provided in the wall;
A damper blade which is formed of a substantially plate-like body having a size capable of closing the hollow portion of the damper frame, and which is disposed on the other space side of the damper frame;
A support mechanism part which is attached to the inner peripheral surface of the damper frame with a part as a stationary node and the other part is attached to the damper blade and movably supports the damper blade on the front side of the damper frame Equipped with
The support mechanism unit
A first guide rail portion erected by attaching an end to the circumferential surface of the damper frame;
A second guide rail portion attached to a surface of the damper blade near the damper frame, with the longitudinal direction aligned with the vertical direction of the damper blade;
A first link member pivotally attached at one end to the upper portion of the first guide rail and at the other end vertically and movably attached to the second guide rail;
The second link member has one end portion vertically and movably attached to the first guide rail portion and the other end portion pivotally attached to the upper portion of the second guide rail portion. ,
A differential pressure damper device characterized in that a predetermined intermediate portion of the first link member and a predetermined intermediate portion of a second link member intersecting the intermediate predetermined portion are movably connected to each other. . In the differential pressure damper device according to claim 1,
A differential pressure damper device, comprising: a weight portion detachably disposed at one end portion of a second link member in the support mechanism portion.

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