JP7063643B2 - Check damper - Google Patents

Description

The present invention relates to a check damper that can be miniaturized with a simple structure and can stably circulate an air flow in a flow passage.

As is well known, a check damper connected to a duct or arranged adjacent to a fan in an air conditioner or the like is widely used.
The check damper enables the flow of airflow from one side of the flow path to the other side, and makes it possible to suppress the flow of airflow from the other side of the flow path to one side (see, for example, Patent Document 1). ).

As such a check damper, those configured as shown in FIGS. 7 and 8 are known. FIG. 7 is a conceptual diagram illustrating an example of a schematic configuration of a check damper according to a first conventional example, and FIG. 8 is a conceptual diagram illustrating an example of a schematic configuration of a check damper according to a second conventional example.

As shown in FIG. 7, the check damper 200 according to the first conventional example is arranged in, for example, a frame member 210, a baffle plate 220 arranged in a flow passage 210H formed in the frame member 210, and a flow passage 210H. It includes damper members 230 and 240 that rotate around an axis.
Then, an air flow is generated by the blower fan 260 arranged on one side F of the check damper 200, and the air flow causes the damper members 230 and 240 to rotate in the direction of the arrow T21 to secure a flow path, thereby distributing. The airflow is circulated through the road 210H from one side F to the other side R.

Further, as shown in FIG. 8, the check damper 300 according to the second conventional example includes, for example, a frame member 310 and a damper member 320 arranged in a flow passage 310H formed in the frame member 310 and rotating around an axis. It includes a 330, a lever-type weight 340, and a stopper 311.

When the check damper 300 has an air flow in the flow passage 310H, the damper members 320 and 330 are rotated in the direction of the arrow T1 by the air flow to open the flow passage 310H, and the inside of the flow passage 310H is entered from one side F. The airflow W3 circulates toward the other side R.

When there is no airflow in the flow passage 310H, the damper member 320 rotates in the direction of arrow T2 due to the load of the lever type weight 340 and returns to the original position to come into contact with the stopper 311 and the damper member 330 has its own weight. It rotates in the direction of arrow T2 and comes into contact with the stopper 311.

Japanese Unexamined Patent Publication No. 2012-122683

However, in the check damper 200 according to the first conventional example, when the airflow passes through the flow passage 210H, the damper members 230 and 240 move the check damper 200 downwardly in the flow passage 210H, and the airflow is passed through the flow passage. It is difficult to move straight in a stable manner within 210H.

Further, the check damper 300 according to the second conventional example needs to be provided with a large lever type weight 340 in order to restore the damper member 330 to the original position, and there is a problem that the check damper 300 becomes large.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a check damper that can be miniaturized with a simple structure and can stably circulate an air flow in a flow passage. And.

In order to solve the above problems, the present invention proposes the following means.
The invention according to claim 1 is a check damper that enables the flow of airflow from one side of the flow passage to the other side and suppresses the flow of the airflow from the other side of the flow passage to one side. A frame member that defines a path, a plurality of axes formed between portions of the frame member that face each other across the flow passage, and a central side of the flow passage that is arranged in the flow passage and is around the axis. A plurality of damper members configured to be rotatable in the first rotation direction from the one side to the other side and to be able to cooperate with each other to block the flow passage, and arranged at the facing portions. A rotation support member that rotatably supports the damper member on both sides in the axial direction is provided, and the rotation support member is an urging member on at least one of the facing portions. The rotation support member is provided with the urging member arranged at both of the portions facing each other across the flow passage, and a balance weight is formed at one end of the damper member . The force member is characterized in that as the damper member rotates in the first rotation direction, an urging force in a second rotation direction opposite to the first rotation direction is applied. And.

According to the check damper according to the present invention, the check damper is arranged in the flow passage so that the central side of the flow passage can be rotated in the first rotation direction from one side around the axis to the other side, and is distributed in cooperation with each other. Since a plurality of damper members configured to block the path are provided, the airflow in the flow path can be guided toward the center symmetrical with respect to the damper member of the flow path. Therefore, even when the airflow passing through the flow passage has a low air volume, the airflow can be circulated symmetrically in the center.
Further, the frame member is provided with a rotation support member which is arranged at the opposite portion and supports the damper member rotatably around the axis on both sides in the axial direction, and the rotation support portion is provided on at least one of the facing portions. The urging member is provided, and the urging member is configured to apply an urging force in the second rotation direction opposite to the first rotation direction as the damper member rotates in the first rotation direction. Therefore, it is not necessary to have a large-scale configuration such as a lever-type weight.
As a result, the size can be reduced with a simple structure, and the airflow can be stably circulated in the flow passage.
Further, according to the check damper according to the present invention, since the rotation support members are arranged on both sides of the portions where the urging members face each other across the flow path, the distance between the rotation support members facing each other across the flow path is large. Even if it is large, the damper member can be rotated stably.

The invention according to claim 2 is the check damper according to claim 1 , wherein an air flow arranged in a central portion in the flow passage and directed from one side to the other side is directed to the outer side of the flow passage. It is characterized by being provided with a baffle plate to be moved to.

According to the check damper according to the present invention, since the baffle plate arranged in the central portion in the flow passage is provided, the bias of the airflow in the flow passage is reduced, and the flow passage is small even in the case of a low air volume. The straightness of the airflow flowing through the can be improved.
As a result, for example, even when the airflow is generated by a blower fan or the like and a vortex is formed in the central portion, the airflow can be brought closer to a parallel flow on the downstream side, and the airflow can be stabilized.

According to the check damper according to the present invention, the size can be reduced with a simple structure, and the air flow can be stably circulated in the flow passage.

It is a conceptual diagram explaining an example of the schematic structure of the air conditioner to which the check damper which concerns on one Embodiment of this invention is applied. It is a figure explaining the schematic structure of the check damper which concerns on one Embodiment of this invention, (A) is a schematic block diagram seen along the flow passage, (B) is a conceptual diagram seen from the side. It is a figure explaining the schematic structure of the check damper which concerns on one Embodiment of this invention, (A) is the schematic block diagram which saw the damper member from the side surface, (B) is the side surface of the damper member and the rotation support member. It is a schematic block diagram seen from. It is a figure explaining the schematic structure of the rotation support member of the check damper which concerns on one Embodiment of this invention, (A) shows the vertical sectional view shown by the arrow view IVA-IVA in (B), (B). ) Is a schematic configuration diagram when the rotation support member is viewed from the damper member side along the axis. It is a conceptual diagram explaining the outline of the adjustment method of the rotation support member of the check damper which concerns on one Embodiment of this invention. It is a conceptual diagram explaining the outline of the operation of the check damper which concerns on one Embodiment of this invention. It is a conceptual diagram explaining an example of the schematic structure of the check damper which concerns on 1st conventional example. It is a conceptual diagram explaining an example of the schematic structure of the check damper which concerns on the 2nd conventional example.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 6.
FIG. 1 is a conceptual diagram illustrating an example of a schematic configuration of an air conditioner to which a check damper according to an embodiment of the present invention is applied. Further, FIG. 2 is a diagram illustrating a schematic configuration of a check damper according to an embodiment, FIG. 2A is a schematic configuration diagram viewed along a flow path, and FIG. 2B is a side view. It is a conceptual diagram. In the figure, reference numeral 10 is an air conditioner, reference numeral 100 is a check damper, reference numeral 110 is a frame member, reference numeral 110H is a flow passage, reference numeral 120 is an inspection panel (baffle plate), and reference numerals 130 and 140 are damper members. , Reference numeral 150 indicate a rotation support member.

As shown in FIG. 1, the air conditioner 10 includes, for example, a check damper 100 and a blower fan 160, and is arranged in an opening formed in a wall portion of a server room in which a server is arranged. There is.
The blower fan 160 includes, for example, a motor (not shown) and a fan rotated by the motor (not shown), and the fan is rotated by the motor to generate an air flow.

Then, the check damper 100 circulates the airflow generated by the blower fan 160 from one side F of the flow passage to the other side R (from the outside to the inside of the server room), and at the same time, from the other side R to the one side F. It is configured to suppress the airflow toward (from the inside to the outside of the server room) and harmonize the inside of the server room.

As shown in FIGS. 1 and 2, the check damper 100 is formed between the frame member 110, the flow passage 110H defined by the frame member 110, and the facing portions of the frame member 110 with the flow passage 110H interposed therebetween. Two (plural) axes J1 and J2, an inspection panel (baffle plate) 120, two (plural) damper members 130 and 140 rotatable around the axes J1 and J2, and an axis J1. , A damper member 130 and four rotation support members 150 that support the damper member 140 are provided on both sides in the J2 direction.

Further, in the check damper 100, the dimensions of the flow passage 110H are set to, for example, a width (horizontal dimension) 740 mm, a height (vertical dimension) 1090 mm, and a thickness (dimension along the flow passage 110H) 100 mm. ing.

As shown in FIG. 1, the frame member 110 is connected to a frame member main body 111 extending from one side F to the other side R and defining a flow passage 110H, and an end portion of one side F of the frame member main body 111. A flange portion 111F extending outward from the frame member main body 111, and a flange portion 111R connected to the end of the other side R of the frame member main body 111 and extending outward from the frame member main body 111. It is provided with an upper stopper 112, a lower stopper 113, a mounting hole 114 formed on the left and right vertical wall portions of the frame member main body 111 to mount the rotation support member 50, a handle 115, and a daruma hole 116.

The frame member main body 111 is formed in a rectangular shape when viewed from one side F along the other side R (hereinafter, referred to as when viewed along a flow path).
In this embodiment, the frame member main body 111 is set, for example, in the vertical direction to be longer than the horizontal (width) direction.
Further, the vertical wall portions located on the left and right sides of the frame member main body 111 are configured so that the axes J1 and J2 are formed at the same height and facing each other with the flow passage 110H interposed therebetween.

The upper stopper 112 is formed along the upper side wall portion in the vicinity of the center of one side F and the other side R of the lower surface (inner surface) of the upper side wall portion located above the frame member main body 111, and is inside the flow passage 110H. It stands toward the side (lower side).

The lower stopper 113 is formed along the lower side wall portion in the vicinity of the center of one side F and the other side R of the upper surface (inner surface) of the lower side wall portion located below the frame member main body 111, and is formed in the flow passage 110H. It stands toward the inward side (upper side).

For example, two mounting holes 114 are formed on the left and right vertical wall portions of the frame member main body 111 corresponding to the axes J1 and J2.
Further, each mounting hole 114 includes, in this embodiment, for example, four screw holes formed on the circumference centered on the axes J and J2 at intervals of 90 ° in the circumferential direction. ..

The handle 115 is formed by bending a round bar into a U shape, for example, and is arranged along the left and right vertical wall portions of the flange portion 111R so that the check damper 100 and the frame member 110 can be efficiently handled. ..

For example, one Daruma hole 116 is arranged on each of the left and right vertical wall portions of the flange portion 111F, and a part of the small diameter circular hole located on the upper side and a part of the large diameter circular hole located on the lower side are overlapped with each other. It is formed by that.

The provision of the Daruma hole 116 makes it possible to temporarily place the check damper 100 on a stud bolt protruding from the wall of the server room when the check damper 100 is attached or detached.
As a result, the check damper 100 can be efficiently attached and detached in a short time while suppressing the occurrence of heavy-duty work.

The inspection panel (baffle plate) 120 is arranged in the central portion in the vertical direction of the flow passage 110H, and is formed, for example, in a rectangular flat plate having a size substantially equal to the horizontal width of the flow passage 110H, and is inspected in the flow passage 110H. An opening having the same vertical dimension is formed on the upper side and the lower side of the panel 120.
Further, bent portions that bend to the other side R are formed at the upper end and the lower end of the inspection panel 120, respectively.

Further, it is preferable to set the vertical dimension of the inspection panel (baffle plate) 120 so as to correspond to, for example, a range in which a vortex is formed in the airflow flowing through the flow passage 110H or a range in which the traveling direction of the airflow is biased. ..
Further, the inspection panel (baffle plate) 120 is detachably attached to the frame member 110 by, for example, a mounting member such as a bolt (not shown).
Then, by removing the inspection panel (baffle plate) 120, it is possible to efficiently perform maintenance of the blower fan 160.

Next, a schematic configuration of the damper member will be described with reference to FIGS. 2 and 3.
3A and 3B are views for explaining a schematic configuration of a check damper according to an embodiment, FIG. 3A is a schematic configuration diagram of a damper member viewed from a side surface, and FIG. 3B is a damper member and a rotation. It is a schematic block diagram which looked at the dynamic support member from the side. The damper member 140 shown in FIG. 3 is shown in the opposite direction to the damper member 140 shown in FIG. 2 in the vertical direction.

As shown in FIGS. 1 and 2, the damper member 130 and the damper member 140 are arranged in the flow passage 110H, and are configured to cooperate with each other to close the flow passage 110H.
Further, the damper member 130 is arranged below the inspection panel (baffle plate) 120, and the damper member 140 is arranged above the inspection panel (baffle plate) 120.

As shown in FIG. 2, the damper member 130 is formed in a rectangular flat plate shape when viewed along the flow passage, corresponds to the width of the flow passage 110H, and has a stopper 113 and an inspection panel (baffle plate). The dimensions are set to correspond to the openings formed between the lower ends of the 120.

Further, as shown in FIG. 3, the damper member 130 includes a damper main body 131, a cover member 134, a balance weight 135, and a rotation shaft 136.
The damper main body 131 is located on the first region portion 131A located on the center side (upper side) of the flow passage 110H with respect to the axis J1 and on the outer side (lower side) of the flow passage 110H with respect to the axis J1. A second region portion 131B is provided, and a semicircular recess is formed at a position corresponding to the axis J1 of the damper main body 131.

The cover member 134 has a semicircular concave portion, and the cylindrical portion 131H is formed by connecting the semicircular concave portion of the cover member 134 so as to face the semicircular concave portion of the damper main body 131. ing.

The balance weight 135 is made of, for example, a plate-shaped member having dimensions in the left-right direction equivalent to those of the second region portion 131B, and is attached to, for example, the surface of one side F of the second region portion 131B.
The damper member 130 can be balanced in the rotation direction around the axis J1 regardless of the position in the circumferential direction around the axis J1.

The rotating shaft 136 is inserted and fixed to the cylindrical portion 131H, and an engaging groove (not shown) having a substantially L shape is formed on both end surfaces so that the rotating shaft 136 can be mounted on the rotating support member 150. ing.
Then, the rotation of the damper member 130 is transmitted to the rotation support member 150, and the urging force generated by the rotation support member 150 is transmitted and applied to the damper member 130.

Further, in the damper member 130, a bent portion 132 that bends to one side F is formed at the upper end portion of the first region portion 131A, and the tip 132E of the bent portion 132 corresponds to the other side R of the lower end portion of the inspection panel 120. It is said that it can be contacted.

Further, in the damper member 130, a bent portion 133 that bends to the other side R is formed at the lower end portion of the second region portion 131B, and the tip 133E of the bent portion 133 can be brought into contact with one side F of the stopper 113. ing.

As shown in FIG. 2, the damper member 140 is formed in a rectangular flat plate shape when viewed along the flow passage, corresponds to the width of the flow passage 110H, and has a stopper 112 and an inspection panel (baffle plate). The dimensions are set to correspond to the openings formed between the upper ends of the 120.

Further, the damper member 140 includes a damper main body 141, a cover member 144, a balance weight 145, and a rotation shaft 146, as shown in () in FIG.
The damper main body 141 is located on the first region portion 141A located on the center side (lower side) of the flow passage 110H with respect to the axis J2 and on the outer side (upper side) of the flow passage 110H with respect to the axis J2. A second region portion 141B is provided, and a semicircular recess is formed at a position corresponding to the axis J2 of the damper main body 141.

The cover member 144 has a semicircular concave portion, and the cylindrical portion 141H is formed by connecting the semicircular concave portion of the cover member 144 facing the semicircular concave portion of the damper main body 141. ing.

The balance weight 145 is made of, for example, a plate-shaped member having dimensions in the left-right direction equivalent to those of the second region portion 141B, and is attached to, for example, the surface of one side F of the second region portion 141B.
The damper member 140 can be balanced in the rotation direction around the axis J2 regardless of the position in the circumferential direction around the axis J2.

The rotating shaft 146 is inserted and fixed to the cylindrical portion 141H, and an engaging groove (not shown) having a substantially L shape is formed on both end surfaces so that the rotating shaft 146 can be mounted on the rotating support member 150. ing.
Then, the rotation of the damper member 140 is transmitted to the rotation support member 150, and the urging force generated by the rotation support member 150 is transmitted and applied to the damper member 140.

Further, in the damper member 140, a bent portion 142 that bends to one side F is formed at the upper end portion of the first region portion 141A, and the tip 142E of the bent portion 142 corresponds to the other side R of the upper end portion of the inspection panel 120. It is said that it can be contacted.

Further, in the damper member 140, a bent portion 143 that bends to the other side R is formed at the lower end portion of the second region portion 141B, and the tip 143E of the bent portion 143 can come into contact with one side F of the stopper 112. ing.

Next, the rotation support member will be described with reference to FIGS. 4 and 5.
4A and 4B are views for explaining the schematic configuration of the rotation support member, FIG. 4A shows a vertical cross-sectional view shown by arrow IVA-IVA in FIG. 4B, and FIG. 4B is shown in FIG. 4B. Is a schematic configuration diagram when the rotation support member is viewed along the axis from the damper member side. Further, FIG. 5 is a conceptual diagram illustrating an outline of an adjustment method of the rotation support member.

The rotation support member 150 is arranged at a position (part) facing each other on the vertical wall portion of the frame member main body 111 corresponding to the axes J1 and J2.

The rotation support member 150 supports the damper member 130 on both sides of the axis J1, and the first region portion 131A located above the axis J1 of the damper member 130 (closer to the center in the flow passage 110H) is on one side. It is rotatable in the first rotation direction T1 that rotates from the side F toward the other side R and in the second rotation direction T2 that is opposite to the first rotation direction T1.

Further, the rotation support member 150 supports the damper member 140 on both sides of the axis J2, and the first region portion 141A located below the axis J2 of the damper member 140 (closer to the center of the flow passage 110H) is provided. It is rotatable in the first rotation direction T1 that rotates from one side F toward the other side R and in the second rotation direction T2 that is opposite to the first rotation direction T1.

That is, the rotation support member 150 has a mirror-symmetrical structure on both sides of the axes J1 and J2. Further, the rotation support member 150 of the axis J1 and the rotation support member 150 of the axis J2 arranged on the left and right vertical wall portions have a mirror-symmetrical structure with each other. Other basic structures are configured in the same way.

As shown in FIG. 4, the rotation support member 150 includes, for example, a housing 151 having a substantially hat-shaped cross section and a spring (spring) 152.
In this embodiment, the mainspring (biasing member) 152 is configured to be arranged at both the left and right portions facing each other across the flow passage 110H, for example.

As shown in FIG. 4A, the housing 151 is formed in a disk-shaped flange 151F, a free-bottomed cylindrical recess 151U formed on the inner peripheral side of the disk-shaped flange 151F, and a disk-shaped flange 151F. It is equipped with an adjusting hole 151H.

The mainspring (energizing member) 152 includes a mainspring main body 152S formed by spirally winding a highly elastic plate material, and an engaging portion 152L located at the inner peripheral end of the mainspring main body 152S. ing.
Further, the mainspring 152 is housed in the recess 151U in this embodiment.

The engaging portion 152L is, for example, formed in an L shape that bends inward, and has engaging grooves (not shown) formed on both end faces of the rotating shafts 136 and 136 constituting the damper members 130 and 140. ) Is inserted to connect the damper members 130 and 140 and the rotation support member 150.

The mainspring body 152S is wound by the rotation shaft member in the clockwise first rotation direction T1 of the axis J1 (J2) in FIGS. 4 (B) and 5, and the second rotation direction T2. It is said that the urging force of is generated.
The urging force in the second rotation direction T2 increases as the rotation in the first rotation direction T1 increases.

In this embodiment, 12 adjusting holes 151H are formed on the same circumference of the disc-shaped flange 151F with an interval of 30 ° in the circumferential direction.
Then, when the rotation support member 150 is attached to the vertical wall portion of the frame member main body 111, the adjustment hole 151H is made to correspond to the attachment hole 114, and the circumferential positions of the rotation support member 150 and the damper members 130, 140 are set. It is said to be adjustable.

Specifically, when mounting the rotation support member 150, for example, as shown in FIG. 5, the rotation support member 150 is rotated in the direction of the arrow S and mounted in the mounting holes 114A, 114B, 114C, 114D. By changing the adjusting hole 151H, the positions of the mainspring (biasing member) 152 in the circumferential direction around the axes J1 and J2 are adjusted, and this occurs when the damper members 130 and 140 rotate in the first rotation direction T1. It is configured to adjust the urging force.

Whether to use one or two springs (biasing members) 152 is determined by, for example, the dimensions of the damper members 130 and 140 within the range in which the damper members 130 and 140 can rotate stably. It can be arbitrarily set based on the weight, balance weight setting, and the like.

Next, the outline of the operation of the check damper will be described with reference to FIG. FIG. 6 is a conceptual diagram illustrating an outline of the operation of the check damper.
In the check damper 100, when the blower fan 160 is driven to generate the airflow W1, the damper members 130 and 140 are rotated in the first rotation direction T1 by the wind force of the airflow W1.

Then, openings are formed on the upper side and the lower side with the inspection panel (baffle plate) sandwiched in the flow passage 110H, and the air flow W1 flows from one side F of the flow passage 110H toward the other side R.
At this time, the airflow W1 is moved toward the center in the vertical direction of the flow passage 110H, and travels substantially straight on the downstream side.

Further, when the blower fan 160 is stopped, the damper members 130 and 140 are rotated in the second rotation direction T2 by the urging force generated in the rotation support member 150, and the damper member 130 and the damper member 140 are moved. Together, it closes the opening formed in the flow passage 110H.

According to the check damper 100 according to the embodiment, the airflow W1 in the flow passage 110H is guided toward the center in the vertical direction of the flow passage 110H, and even when the airflow W1 passing through the flow passage 110H has a low air volume. , The airflow W1 can be made to travel almost straight on the downstream side.

Further, the damper members 130 and 140 are supported by the rotation support member 150, and as the damper members 130 and 140 rotate in the first rotation direction T1, the second rotation direction T1 is opposite to the first rotation direction T1. Since it is configured to apply an urging force in the rotation direction T2, a large-scale configuration such as a lever-type weight is not required.
As a result, the size can be reduced with a simple structure, and the airflow W1 can be stably circulated in the flow passage 110H.

According to the check damper 100 according to the embodiment, since the inspection plate (baffle plate) 120 is provided, the bias of the airflow W1 in the flow passage 110H is reduced, and the flow passage 110H is provided even in the case of a low air volume. The straightness of the airflow W1 flowing through the water can be improved.
As a result, for example, even when a vortex is formed in the airflow W1 by the blower fan 160, the airflow W1 can be brought closer to a parallel flow on the downstream side, and the airflow W1 can be stabilized.

Further, according to the check damper 100 according to the embodiment, the damper members 130 and 140 are restored to their original positions by the urging force of the rotation support member 150, so that the axes J1 and J2 of the damper members 130 and 140 are horizontal. It may be set in a direction other than the direction, and the target when installing the check damper 100 can be expanded.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention.

For example, in the above embodiment, the case where the check damper 100 is used together with the blower fan 160 and applied to the air conditioner 10 has been described, but the use of the check damper 100 can be arbitrarily set. For example, the check damper 100 may be arranged at the end of the duct or in the middle of the duct, or may be applied to any other use.

Further, in the above embodiment, the case where the check damper 100 includes the inspection plate (baffle plate) 120 has been described, but whether or not the check plate (baffle plate) 120 is provided can be arbitrarily set.
Further, instead of the inspection plate (baffle plate) 120, a baffle plate not used for inspection may be provided.

Further, in the above embodiment, the case where the rotation support member 150 includes the mainspring 152 has been described, but the configuration may include an urging member other than the mainspring 152.

Further, in the above embodiment, the case where one damper member 130 and one damper member 140 are arranged in each of the flow passages 110H has been described, but the number of damper members can be arbitrarily set, for example. A plurality of damper members may be provided above and below the center of the flow passage 110H, respectively.

Further, in the above embodiment, the case where the rotation support member 150 has the mainspring (biasing member) 152 arranged at both the left and right portions facing each other across the flow passage 110H has been described. The balance spring (biasing member) 152 may be arranged on one of the portions facing each other across the 110H.

Further, in the above embodiment, the case where the damper members 130 and 140 are arranged on the upper side and the lower side of the flow passage 110H has been described, but for example, the rotation shaft may be arranged in the vertical direction, or in the vertical direction and It is also possible to arrange the axes in a direction that intersects both in the horizontal direction.

Further, in the above embodiment, the case where the flow passage 110H is formed in a rectangular shape when viewed along the flow passage has been described, but the shape of the flow passage can be arbitrarily set. For example, it may be formed into a polygon or a circle.

According to the check damper according to the present invention, it can be miniaturized with a simple structure, and the airflow in the flow passage can be stably circulated, so that it can be industrially used.

F One side R Other side J1, J2 Axis line 10 Air conditioner 100 Check damper 110 Frame member 110H Flow passage 111 Frame member body 111F, 111R Flange part 112 Upper stopper 113 Lower stopper 114 Mounting hole 115 Handle 116 Daruma hole 120 Inspection panel (baffle) plate)
130, 140 Damper member 136, 146 Rotating shaft 150 Rotating support member 152 Mainspring (biasing member)
152S Wind-up spring body (biasing member)
160 blower fan

Claims (2)

A check damper that enables the flow of airflow from one side of the flow passage to the other side and suppresses the flow of airflow from the other side of the flow passage to one side.
The frame member that defines the flow passage and
A plurality of axes formed between the portions of the frame member facing each other across the flow passage, and
Arranged in the flow passage, the central side of the flow passage can be rotated in the first rotation direction from the one side around the axis toward the other side, and the flow passage can be closed in cooperation with each other. With multiple damper members configured in
A rotation support member arranged at the facing portion and rotatably supporting the damper member on both sides in the axial direction.
Equipped with
The rotation support member includes an urging member on at least one of the facing portions.
The rotation support member is arranged on both sides of the portion where the urging member faces the flow passage.
A balance weight is formed at one end of the damper member.
The urging member is configured to apply an urging force in a second rotation direction opposite to the first rotation direction as the damper member rotates in the first rotation direction. A check damper featuring. The check damper according to claim 1 .
A check damper provided at a central portion of the flow passage and provided with a baffle plate that moves an air flow from one side toward the other side to the outside of the flow passage.

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