JPH078673U - Electric damper - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an electric damper that has a low overall height, is small and compact, and is easy to assemble and maintain and is inexpensive. [Structure] An air intake port 2 is formed in the bottom surface of a cylindrical main case 1, and a rotary impeller 3 for opening and closing the air intake port 2 is pivotally supported on the main case 1. The electric operating device 4 is fixed to a set plate 5, the set plate 5 is inserted and fixed to the main case 1, and the upper end shaft portion 8 of the rotary impeller 3 is guided and inserted into the taper portion 7 of the set plate 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric damper that opens and closes a damper arranged at an outlet that blows outside air or conditioned air from a floor surface into a room by an electric operating device.

[0002]

[Prior art]

 A conventional electric damper will be described with reference to FIG. The bottomed cylindrical main case 1 having an open top is embedded under the floor, and a grid-like cover (not shown) through which air can pass is attached to the top opening. The outer peripheral surface of the main case 1 has a cutout-shaped hood that serves as an air intake 2, and the atmosphere enters the main case 1 from the outer periphery of the main case 1 through the air intake 2. , Flows upward in 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 a rotary impeller 3 is rotatably supported on the bottom of the main case 1, and a wing portion 10 is formed on the outer periphery of the rotary impeller 3 to control the 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 type operating device in which the output shaft 11 rotates. The output shaft 11 is fitted to the upper end shaft portion 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 by two bolts 14 to a flange portion 13 protruding inside the main case 1.

[0003]

[Problems to be solved by the device]

 The conventional electric damper has the following drawbacks. 1) Since the air intake is arranged on the outer circumference of the main case, the total height is increased to secure the opening area. 2) It is necessary to secure the entire height of the outer peripheral vanes of the rotary impeller, and the total length of the rotary impeller becomes long. 3) When the main case 1 is molded by a mold, since the lateral surface (outer peripheral surface) is an opening, it becomes a lateral slide mold and the mold becomes large and expensive. 4) The maintenance man-hours of the electric actuator and the rotary impeller are large, and the assembly man-hours are large.

The present invention has been made in view of the above conventional drawbacks, and an object thereof is to provide an electric damper which has a low overall height, is small and compact, and is easy to assemble and maintain and inexpensive. .

[0005]

[Means for Solving the Problems]

 The present invention relates to an electric damper including a damper that controls opening and closing of an air outlet on the floor and an electric operating device that drives the damper, in which an air inlet is arranged on a bottom surface of a cylindrical main case, A rotary impeller that opens and closes the air intake is pivotally supported on the main case, an electric operating device that drives the rotary impeller is fixed to the set plate, and a fixing part that inserts and fixes the set plate into the main case is attached. It is installed to prevent rotation, and a taper part is placed on the set plate to serve as an insertion guide for the upper end shaft part of the rotary impeller.

[0006]

[Action]

 The blades of the rotary impeller control the opening and closing of the air inlet facing the air inlet 2 opened on the bottom surface of the cylindrical main case. The rotary impeller is driven by an electric operating machine. The main case and the set plate are fixed to each other while being prevented from rotating at the fitting portions. Since the set plate to which the electric operating device is fixed is assembled and inserted from the upper side to the lower side, the taper portion serves as a guide portion with respect to the upper end shaft of the rotary impeller, which facilitates the assembling.

[0007]

【Example】

 An 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 grid-like cover (not shown) through which air can pass is attached to the opening of the upper end surface. On the bottom surface of the main case 1, two fan-shaped openings each having an area of about 1/4 are arranged as air intakes 2. The atmosphere flows from the lower surface of the main case 1 through the air intake port 2 and upward in 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 pivotally supported on the bottom of the main case 1 in a rotating manner. In the middle of the rotary impeller 3, two substantially fan-shaped vanes 10 are formed. Reference numeral 4 denotes an electric operating device, which is a rotary type operating device in which the output shaft 11 rotates. The output shaft 11 is fitted and assembled to the upper end shaft portion of the rotary impeller 3. The output shaft of the electric operating machine rotates 90 degrees forward and 90 degrees in reverse, and can be rotated forward, reverse, and stopped intermediately when the power is turned on or off. Reference numeral 5 denotes a set plate of the electric operating machine, which is fixed to each other by two bolts 12. A brim portion 13 projects inside the main case 1, and the concave groove of the brim portion 13 and the convex portion of the set plate 5 mutually form a blind eye portion 6. A taper portion 7 is formed at the lower end of the set plate 5, and when the set plate 5 is assembled from above, it acts as a guide for the upper end shaft portion of the rotary impeller 3.

In this case, since the air intake port 2 is arranged on the bottom surface of the main case 1, the overall height can be reduced. Also, the blade portion 10 of the rotary impeller 3 can be made thin, the total length can be shortened, and the size can be reduced. When the main case 1 is molded by a mold, the mold can be divided into upper and lower molds, so the structure of the mold is simple and can be manufactured at low cost. Further, in the assembling, the rotary impeller 3 is assembled in the main case 1 and then the set plate 5 to which the electric operating machine 4 is fixed is inserted from above to complete the assembly. At this time, the taper portion 7 of the set plate 5 serves as an assembly guide for the upper end shaft portion of the rotary impeller 3 to prevent the rotary impeller 3 from collapsing, which facilitates assembly. Further, since the main case 1 and the set plate 5 are fitted to each other at the fitting portion 6, rotation is prevented, and fixing means such as bolts are not required, which facilitates assembly. In addition, for service and maintenance, the electric operating unit 4 and the rotary impeller 3 can be pulled out and replaced from above, so that the main case 1 can be serviced under the floor.

[0009]

[Effect of device]

 As described above in detail, since the present invention is of the lower suction type, the overall height can be greatly reduced and the installation space can be greatly reduced. Further, since it is downsized, the cost of parts and the cost of the mold can be greatly reduced. Furthermore, assembling man-hours can be reduced and service / maintenance is facilitated, which has high industrial utility value.

[Brief description of drawings]

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

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

3 is a top plan view of FIG. 1. FIG.

FIG. 4 is a bottom plan view of FIG.

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

[Explanation of symbols]

 1 Main case 2 Air intake 3 Rotary impeller 4 Electric actuator 5 Set plate 6 Saddle eye part 7 Tapered part 8 Shaft part

Claims (1)

[Scope of utility model registration request] 1. An electric damper comprising a damper for controlling opening and closing of an air outlet on a floor surface and an electric operating device for driving the damper, wherein an air intake port 2 is arranged on a bottom surface of a cylindrical main case 1. , A rotary impeller 3 for opening and closing the air inlet 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. A fixing eye portion 6 for fixing is provided to prevent rotation, and a taper portion 7 is provided on the set plate 5.
And the upper end shaft portion 8 of the rotary impeller 3
An electric damper characterized by being used as an insertion guide.