JP2592251Y2 - Electric damper - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric damper in which a damper disposed at an outlet for blowing outside air or conditioned air from a floor surface into a room is opened and closed by an electric operating device.

[0002]

2. Description of the Related Art A conventional electric damper will be described with reference to FIG. A cylindrical main case 1 having an open top and a bottom is embedded under the floor, and a lattice-like cover (not shown) through which air can pass is attached to the upper opening. A notched round opening serving as an air inlet 2 is opened on the outer peripheral surface of the main case 1, and the atmosphere enters the main case 1 from the outer periphery of the main case 1 through the air inlet 2. The air flows upward in the case 1 and is blown into the room from the upper surface of the main case 1. A lower end shaft portion of the rotary impeller 3 is pivotally supported at the bottom of the main case 1, and a wing portion 10 is formed on the outer periphery of the rotary impeller 3 for controlling opening and closing of the air intake 2 by rotating. Reference numeral 4 denotes an electric operating device including an electric motor and a speed reducer, which is a rotary operating device in which the output shaft 11 rotates. The output shaft 11 is fitted to the upper end shaft of the rotary impeller 3. Reference numeral 5 denotes a set plate of the electric operating device 4, which is fixed to each other by two bolts 12. The set plate 5 is fixed to the flange 13 projecting into the main case 1 with two bolts 14.

[0003]

The conventional electric damper has the following disadvantages. 1) Since the air intake is located on the outer periphery of the main case,
In order to secure the opening area, the total height is increased. 2) The wings on the outer periphery of the rotary impeller must also secure the entire height, and the total length of the rotary impeller also becomes longer. 3) When the main case 1 is molded by a mold, since the lateral surface (outer peripheral surface) is an opening, it becomes a horizontal slide type and the mold becomes large and expensive. 4) Maintenance replacement and assembling man-hours for the electric operating device and the rotary impeller are large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide an electric damper which is low in overall height, small, compact, easy to assemble and maintain, and inexpensive.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an electric damper having a damper for controlling the opening and closing of an air outlet on the floor and an electric operating device for driving the damper. An air intake is arranged, a rotary impeller for opening and closing the air intake is pivotally supported on the main case, an electric operating device for driving the rotary impeller is fixed to a set plate, and the set plate is inserted into the main case. A fixed hook portion is provided to prevent rotation, and a tapered portion is arranged on the set plate to serve as an insertion guide for the upper shaft portion of the rotary impeller.

[0006]

The blade of the rotary impeller controls the opening and closing of the air intake, facing the air intake 2 opened at the bottom of the cylindrical main case. The rotary impeller is driven by an electric operating device. The main case and the set plate are fixed to each other while being prevented from rotating at the hook portion. Since the set plate to which the electric operating device is fixed is attached and inserted downward from above, the tapered portion serves as a guide portion with respect to the upper end shaft of the rotary impeller, so that the assembly is facilitated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The bottomed cylindrical main case 1 is arranged under the floor, and a lattice-shaped cover (not shown) through which air can pass is attached to an opening on the upper end surface. On the bottom surface of the main case 1, two fan-shaped openings having an area of about a quarter are arranged as the air intake 2. The atmosphere passes through the air inlet 2 from the lower surface of the main case 1 and passes through the main case 1.
Flows upward through the inside of the main case 1 and is blown into the room from the upper surface of the main case 1. A lower end shaft portion of the rotary impeller 3 is rotatably supported on the bottom of the main case 1. Two substantially fan-shaped wing portions 10 are formed in the middle of the rotary impeller 3. Reference numeral 4 denotes an electric operating device, which is a rotary operating device in which the output shaft 11 rotates. The output shaft 11 is fitted and attached to an upper end shaft portion of the rotary impeller 3. The output shaft of the electric operating machine rotates forward and backward by 90 degrees, and can perform forward rotation, reverse rotation, and intermediate stop according to turning on and off of the power supply. Reference numeral 5 denotes a set plate of the electric operating machine, which is fixed to each other by two bolts 12. A flange 13 projects from the inside of the main case 1.
The concave groove of No. 3 and the convex portion of the set plate 5 together form a hook portion 6. A tapered portion 7 is formed at the lower end of the set plate 5, and acts as a guide for the upper shaft portion of the rotary impeller 3 when the set plate 5 is assembled from above.

In this case, since the air inlet 2 is arranged on the bottom surface of the main case 1, the overall height can be reduced.
In addition, the wing 10 of the rotary impeller 3 can be made thinner, so that the overall length is shorter and smaller. When the main case 1 is molded by a mold, the upper and lower split molds may be used. In addition, in assembling, after assembling the rotary impeller 3 into the main case 1, the assembling is completed by inserting the set plate 5 to which the electric operating device 4 is fixed from above. At this time, the tapered portion 7 of the set plate 5
Serves as an assembling guide for the upper end shaft of the rotary impeller 3, preventing the rotary impeller 3 from falling down and facilitating assembly. Also, main case 1 and set plate 5
Is fitted at the hook-eye portion 6, so that rotation is prevented, and fixing means such as bolts are not required, thus facilitating assembly.
In service maintenance, the electric operating device 4 and the rotary impeller 3 can be pulled out and replaced from above, so that service can be performed with the main case 1 fixed below the floor.

[0009]

[Effects of the Invention] As described in detail above, the present invention uses a lower suction type, so that the overall height can be greatly reduced and the installation space can be greatly reduced. Also, since the size is reduced, the cost of parts and the cost of the mold can be greatly reduced. Further, assembling man-hours can be reduced in assembling and service / maintenance is facilitated, so that the industrial use value is high.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of the electric damper of the present invention.

FIG. 2 is a longitudinal sectional view taken along line XX of FIG.

FIG. 3 is an upper plan view of FIG. 1;

FIG. 4 is a bottom plan view of FIG. 1;

FIG. 5 is a longitudinal sectional view of a conventional electric damper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main case 2 Air inlet 3 Rotary impeller 4 Electric operating device 5 Set plate 6 Saddle-eye part 7 Taper part 8 Shaft part

Claims (1)

(57) [Scope of request for utility model registration] 1. An electric damper having a damper for controlling the opening and closing of an air outlet on a floor surface and an electric operating device for driving the damper, wherein an air inlet 2 is arranged on a bottom surface of a cylindrical main case 1. A rotary impeller 3 for opening and closing the air intake is pivotally supported on the main case 1, an electric operating device 4 for driving the rotary impeller is fixed to a set plate 5, and the set plate 5 is inserted into the main case 1. The fixing plate 6 is provided to prevent rotation, and the set plate 5 has a tapered portion 7.
And the upper end shaft portion 8 of the rotary impeller 3
An electric damper characterized in that the damper is used as an insertion guide.