Damper opening and closing device

Patent metadata

Field	Value
Publication number	US-10076948-B2
Application number	US-201414169371-A
Country	US
Kind code	B2
Filing date	Jan 31, 2014
Priority date	Feb 21, 2013
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A damper opening and closing device includes an outer cylinder, an inner cylinder that is disposed inside the outer cylinder, is supported movably relative to the outer cylinder and has a fluid passage therein, and a damper group that includes a plurality of dampers disposed in the fluid passage so that the fluid passage is openable and closable. The plurality of dampers are arranged in a circumferential direction of the fluid passage and disposed in the fluid passage in such a way that inner peripheral edges of the dampers are opposed to each other. The damper opening and closing device further includes an angle control unit configured to control the tilt angle of the damper in conjunction with movement of the inner cylinder relative to the outer cylinder.

First claim

What is claimed is:

1. An opening and closing device comprising:
an outer cylinder;
an inner cylinder that is disposed inside the outer cylinder, is supported movably relative to the outer cylinder and has a fluid passage therein; and
a damper group that includes three dampers disposed in the fluid passage so that the fluid passage is openable and closable,
wherein
the three dampers are arranged in a circumferential direction of the fluid passage and disposed in the fluid passage in such a way that inner peripheral edges of the dampers are opposed to each other,
each of the dampers is swingably supported to the inner cylinder and a tilt angle of the dampers to an axial direction of the fluid passage is changed by swinging each of the three dampers relative to the inner cylinder in order to adjust the flow amount of fluid passing through the fluid passage,
the opening and closing device further comprises an angle control unit configured to control the tilt angle of each of the three dampers in conjunction with movement of the inner cylinder relative to the outer cylinder,
the inner peripheral edge of each of the three dampers is disposed on the upstream side of the fluid passage and the outer peripheral edge of each of the three dampers is disposed on the downstream side of the fluid passage,
each of the three dampers has a diffusion blowing position where an opening area of the outer peripheral edge disposed on the downstream side of the respective damper is larger than an opening area of the inner peripheral edge disposed on the upstream side of the respective damper,
each of the three dampers has an intensive blowing position where an opening area of the outer peripheral edge disposed on the downstream side of the respective damper is smaller than an opening area of the inner peripheral edge disposed on the upstream side of the respective damper, and
the inner peripheral edges of the three dampers are opposed to each other across an open space when the opening and closing device is in an open position.

2. The opening and closing device according to claim 1 , wherein spaces between outer peripheral edges of the three dampers and the inner cylinder are fully closed and a space among the inner peripheral edges of the three dampers is fully closed when the three dampers are in a closed position where the tilt angle is maximized, and
the spaces between the outer peripheral edges of the three dampers and the inner cylinder are opened and the space among the inner peripheral edges of the three dampers is opened by reducing the tilt angle of each of the three dampers from the maximum tilt angle in the closed position.

3. The opening and closing device according to claim 1 , wherein the inner cylinder includes a plural sets of paired bearing portions that are provided in an inner peripheral surface and disposed in positions spaced in the circumferential direction, and
each of the three dampers includes a pair of support parts that is pivotally supported to each of the paired bearing portion of the inner cylinder, the outer peripheral edge of each damper is formed radially outward of the support parts in between the pair of support parts and the inner peripheral edge of each damper is formed radially inward of the support parts in between the pair of support parts.

4. The opening and closing device according to claim 3 , wherein a plurality of bearing portions is arranged at positions that are located at equal intervals in the circumferential direction of the inner cylinder and each damper is swung while using, as a pivot axis, a chord connecting linearly respective bearing portions.

5. The opening and closing device according to claim 1 , wherein the inner cylinder is pivoted in the circumferential direction with respect to the outer cylinder and the angle control unit adjusts the tilt angle of the three dampers in conjunction with the pivoting of the inner cylinder.

6. The opening and closing device according to claim 5 , wherein the angle control unit includes a protrusion protruded from an outer surface of at least one of the three dampers and a guide groove that is formed in an inner peripheral surface of the outer cylinder and causes the protrusion to move axially in conjunction with the pivoting of the inner cylinder.

7. The opening and closing device according to claim 5 , wherein the angle control unit includes a pinion protruded from an outer surface of each of the three dampers and a rack that is formed in an inner peripheral surface of the outer cylinder and meshed with the pinion.

8. The opening and closing device according to claim 1 , further comprising:
a cylindrical retainer that integrally and rotatably accommodates a main body including the outer cylinder, the inner cylinder and the damper group; and
a connection support part that is fixed to the retainer and positioned in the axial center of the retainer to pivotably support the main body.

9. The opening and closing device according to claim 8 , further comprising:
a main body support part that is fixed to the inner cylinder, positioned in the axial center of the inner cylinder and pivotably supported to the connection support part.

10. The opening and closing device according to claim 9 , wherein the connection support part is fixed to the retainer by being connected to a first rib extending radially inward from the retainer and the main body support part is fixed to the inner cylinder by being connected to a second rib extending radially inward from the inner cylinder.

11. The opening and closing device according to claim 8 , wherein the inner peripheral edges of the three dampers are disposed on the downstream side of the outer peripheral edges of respective dampers and the connection support part is disposed on the upstream side of respective dampers.

12. The opening and closing device according to claim 8 , wherein one of the connection support part and the main body support part has a ball portion at a leading end thereof and the other of the connection support part and the main body support part has a sliding portion in which the ball portion is pivotably slid.

13. The opening and closing device according to claim 1 , wherein the damper group consists of three dampers.

14. The opening and closing device according to claim 1 , wherein the three dampers are each single, integral units capable of tilting on separate axes.

15. The opening and closing device according to claim 14 , wherein the separate axes each form a chord with respect to a circular circumference of the inner cylinder.

16. The opening and closing device according to claim 1 , wherein the three dampers are formed inside of a circular circumference of the inner cylinder.

17. The opening and closing device according to claim 1 , wherein the three dampers are each connected at respective first and second ends to the inner cylinder.

18. The opening and closing device according to claim 1 , wherein each of the three dampers is pivotably supported to the inner cylinder and a tilt angle of each of the three dampers to an axial direction of the fluid passage is changed by pivoting each of the three dampers relative to the inner cylinder in order to adjust the flow amount of fluid passing through the fluid passage.

Assignees

• Toyoda Gosei Kk

Inventors

• Takai Hajime
• Shibata Minoru
• Ogura Mitsuo
• Sakai Hiroshi
• Asano Kenji

Classifications

• B60H1/3442 Primary

  the frame being spherical · CPC title

• B60H1/345

  with means for adjusting divergence, convergence or oscillation of air stream · CPC title