JP5427489B2 - Natural air inlet device - Google Patents

Description

  The present invention relates to a differential pressure type natural air inlet apparatus that is installed on a wall of a building and the like and supplies air in response to a pressure difference between the inside and outside generated by exhaust air from a ventilation fan or the like.

  This type of natural air supply port device has a cylindrical body that is inserted into a duct embedded in a wall, and has a mounting frame that is attached with a flange portion in contact with a wall surface on the indoor side, and rotates into the cylindrical body. There is a shutter that is freely arranged and that opens and closes a cylindrical body, and an operating means that opens and closes the shutter by moving a connecting rod up and down by rotating an operating lever.

  In this natural air supply port device, a fully closed state in which the shutter is forcibly opened constantly by raising the connecting rod to the upper position and a shutter is always closed by forcibly closing the connecting rod to the lower position. By moving the connecting rod to an intermediate position between the upper position and the lower position, it opens when there is a pressure difference inside and outside the room, and closes when there is no pressure difference (for example, see Patent Document 1). .)

JP 2000-1049888 A

  However, in the known example described above, the shutter and the connecting rod are always connected, and both operate in conjunction with each other. For this reason, the opening / closing operation of the shutter due to a normal pressure difference cannot be performed smoothly. Especially, when dust or dirt adheres to the connecting part due to long-term use, the movement of the shutter becomes heavy and the ventilation function is impaired. There was the inconvenience that it was.

  The present invention has been made paying attention to the above circumstances, and its purpose is to smoothly open and close the shutter by a normal pressure difference, and dust and dirt adhere to the connecting portion between the shutter and the connecting lever. However, it is an object of the present invention to provide a differential pressure type natural air inlet device that can maintain a good ventilation function without increasing the movement of the shutter.

  In order to solve the above-described problems, the present invention has a cylindrical body that is inserted through a wall, and is attached to a mounting frame that is attached by contacting a flange portion with a wall surface on the indoor side, and is rotatably disposed in the cylindrical body. A plurality of shutters for opening and closing the cylindrical body, and opening and closing the shutters via a connecting lever that moves up and down by a sliding movement of an operation lever. The shutter is moved upward by moving the connecting lever to an upper position. To a fully open state in which the shutter is forcibly opened, and the shutter is forcibly closed in a fully closed state by lowering the connecting lever to the lower position, and the connecting lever is positioned between the upper position and the lower position. And an operating means for opening the shutter when there is a pressure difference between the inside and outside of the room, and closing the shutter when there is no pressure difference. Shutter fully opened, and at the time of the fully closed state is connected to the shutter, when the open state of the shutter, characterized in that the connection between the shutter is released.

  According to the present invention, the shutter can be opened and closed smoothly by a normal pressure difference, and even if dust or dirt adheres to the connecting portion of the shutter and the connecting lever, the shutter does not become heavy, and the ventilation function Can be maintained well.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view showing a differential pressure type natural air inlet device according to an embodiment of the present invention. The external appearance perspective view which shows the state which removed the panel of the natural air inlet apparatus of FIG. The perspective view which shows the operation lever of the natural air inlet apparatus of FIG. The perspective view which shows the connection lever of the natural air inlet apparatus of FIG. The perspective view which shows the shutter of the upper stage of the natural air inlet apparatus of FIG. The perspective view which shows the shutter of the middle stage of the natural air inlet apparatus of FIG. The perspective view which shows the shutter of the lower stage of the natural air inlet apparatus of FIG. The sectional side view which shows the operation | movement which makes the shutter of the natural air inlet apparatus of FIG. 2 forcibly fully open. FIG. 3 is a cross-sectional perspective view showing an operation of forcibly opening a shutter of the natural air inlet device of FIG. 2. The principal part perspective view which shows the operation | movement which makes the shutter of the natural air inlet apparatus of FIG. 2 forcibly fully open. The sectional side view which shows the operation | movement which makes the shutter of the natural air inlet apparatus of FIG. 2 forcibly fully close. FIG. 3 is a cross-sectional perspective view showing an operation for forcibly closing a shutter of the natural air inlet device of FIG. 2. The principal part perspective view which shows the operation | movement which makes the shutter of the natural air inlet apparatus of FIG. 2 forcibly fully close. The sectional side view which shows the operation | movement which opens the shutter of the natural air inlet apparatus of FIG. The cross-sectional perspective view which shows the operation | movement which opens the shutter of the natural air inlet apparatus of FIG. The principal part perspective view which shows the operation | movement which opens the shutter of the natural air inlet apparatus of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an external perspective view showing a differential pressure type natural air inlet apparatus according to an embodiment of the present invention, and FIG. 2 is an external perspective view showing a state in which a panel portion 2 is removed from the natural air inlet apparatus. It is.

  The natural air inlet apparatus includes a mounting frame 1, and a cylindrical body 1 a is provided at the center of the mounting frame 1. The natural air inlet apparatus is installed by inserting the cylindrical body 1a into a duct embedded in a wall and attaching the mounting frame 1 to a wall surface on the indoor side. A panel portion 2 is detachably attached to the front surface of the attachment frame 1.

  The mounting frame 1 has its flange portion 1b pressed against the wall surface of the room, and has a protrusion 1c on the lower left side of the flange portion 1b and a claw 1d on the lower right side. An operation lever 3 and a gear 5 are provided on the lower side of the flange portion 1b. The operation lever 3 is supported by the protrusion 1c and the claw 1d of the flange portion 1b so as to be slidable in the left-right direction.

  A connecting lever 4 is provided at the center in the left-right direction of the flange portion 1b of the mounting frame 1 so as to be movable up and down along the vertical direction. The connecting lever 4 and the operation lever 3 constitute an operation means. In the cylindrical body 1a of the mounting frame 1, shutters 6a, 6b, 6c in the upper, middle and lower stages are attached to be freely opened and closed, and are opened and closed by the operating means.

  FIG. 3 shows the operation lever 3 described above.

  A knob part 3a is provided at the lower end of the operation lever 3 and a tooth mold part 3b is provided at the upper part of the one end. The gap between the knob part 3a and the tooth mold part 3b extends along the sliding direction of the operation lever 3. A hole 3c is formed. A gear 5 is meshed with the tooth mold portion 3b of the operation lever 3, and a projection 1c is inserted into the elongated hole 3c. Further, a substantially stepped groove 3d is formed at a substantially central portion of the operation lever 3.

  FIG. 4 is a perspective view showing the connecting lever 4 described above.

  The connecting lever 4 is provided with a protrusion 4a at the lower end of the front surface, and the protrusion 4a is slidably inserted into the groove 3d of the operation lever 3 as shown in FIG. The protrusion 4a is moved up and down along the groove 3d by the sliding operation of the operation lever 3 to move the connecting lever 4 up and down.

  Further, upper, middle, and lower arm portions 8a, 8b, and 8c are integrally formed on the back side of the connecting lever 4, and arc-shaped claws are formed at the distal ends of the arm portions 8a, 8b, and 8c. Portions 9a, 9b, 9c are provided, respectively.

  FIG. 5 is a perspective view showing the upper shutter 6a, FIG. 6 is a middle shutter 6b, and FIG. 7 is a lower shutter 6c.

  The upper, middle, and lower shutters 6a to 6c have different outer shapes, but rotation center shafts 11 project from the both side surface portions on the upper side, and further to the substantially central portion on the upper side. A recess 12 is formed. A mounting piece 13 is provided on one inner side surface of the recess 12, and a part of the mounting piece 13 protrudes from the recess 12. A rotation center shaft 14 projects from the projecting portion of the mounting piece 13.

  When the connecting lever 4 is raised to the upper position, as shown in FIG. 8, the inner surfaces of the claw portions 9a to 9c push up the rotation center shaft 14 of the shutters 6a to 6c so that the shutters 6a to 6c The rotary shaft 11 is rotated upward about the rotation center shaft 11 to be forcibly opened to be in a fully open state.

  Further, when the connecting lever 4 is lowered to the lower position, as shown in FIG. 11, the shutters 6a to 6c are pressed by the tip end sides of the claw portions 9a to 9c, thereby causing the shutters 6a to 6c to move to the central axis of rotation. 11 is pivoted downward about the center to forcibly close it to a fully closed state.

  Further, since the connecting lever 4 is positioned at an intermediate portion between the upper position and the lower position, as shown in FIG. While being spaced apart from the shaft 14, it is positioned in the recess 12 of each shutter 6a-6c. As a result, the claw portions 9a to 9c of the arm portions 8a to 8c of the connecting lever 4 do not lift the rotation center shaft 14 of the shutters 6a to 6c and do not press against the shutters 6a to 6c. Each of the shutters 6a to 6c can be rotated by a pressure difference between the room and the outside.

  Next, the operation for fully opening the shutters 6a to 6c will be described with reference to FIGS.

  In this case, first, the knob 3a of the operation lever 3 is picked, and the operation lever 3 is slid rightward as indicated by an arrow in FIG. As a result, when the protrusion 4a of the connecting lever 4 rises along the stepped groove 3d of the operating lever 3 and reaches the upper step, the connecting lever 4 rises and reaches the upper position. As a result, the rotation center shafts 14 of the shutters 6a to 6c are pushed up by the claws 9a to 9c of the arm portions 8a to 8c of the connecting lever 4 as shown in FIGS. With this push-up, the shutters 6a to 6c are forcibly rotated upward about the rotation center axis 14 to be in a substantially horizontal state and fully opened.

  Next, the operation for fully closing the shutters 6a to 6c will be described with reference to FIGS.

  In this case, the knob 3a of the operation lever 3 is picked and moved to the left as indicated by an arrow in FIG. Thereby, when the protrusion 4a of the connecting lever 4 descends along the stepped groove 3d of the operating lever 3 and reaches the lower step, the connecting lever 4 descends to the lower position. Accordingly, as shown in FIGS. 11 and 12, the shutters 6 a to 6 c are pressed by the distal end side of the claw portions 9 a to 9 c of the arm portions 8 a to 8 c of the connecting lever 4. By this pressing, the shutters 6a to 6c are forcibly rotated downward about the rotation center axis 11 to be closed, and are fully closed.

  Next, an operation for opening the shutters 6a to 6c will be described with reference to FIGS.

  In this case, the knob portion 3a of the operation lever 3 is picked and slid to the middle portion in the left-right direction. Accordingly, as shown in FIG. 16, the protrusion 4 a of the connecting lever 4 moves along the stepped groove 3 d of the operation lever 3 and is positioned at the middle step. As a result, the connecting lever 4 is positioned at an intermediate portion between the upper portion and the lower portion, and as shown in FIG. While being spaced apart from the shaft 14, it is positioned in the recess 12 of the shutters 6a-6c. As a result, the claw portions 9a to 9c of the arm portions 8a to 8c of the connecting lever 4 do not lift the rotation center shaft 14 of the shutters 6a to 6c and do not come into pressure contact with the shutters 6a to 6c. That is, the shutters 6a to 6c are in a free state. When there is no pressure difference inside and outside the room, the shutters 6a to 6c are closed by their own weight and opened when a pressure difference occurs.

  As described above, according to this embodiment, the connecting lever 4 and the shutters 6a to 6c are not always connected, but are connected only when forced fully open and forced fully closed, and an opening / closing operation by a normal pressure difference is performed. Since the connection with the connecting lever 4 is released, the shutters 6a to 6c can be opened and closed smoothly. In particular, even if the connecting part deteriorates or dust or dirt adheres, the shutter opening and closing operation is adversely affected. Never give.

  In a general airtight house, outside air is supplied from the gap of the house in addition to the differential pressure type air inlet, so that the pressure difference between the indoor and the outside becomes low and the air is supplied from the differential pressure type air inlet. Disappear. In particular, when the gap is close to the ventilation fan, a short circuit state occurs and efficient ventilation cannot be performed. However, since the differential pressure type air supply port is fully opened, ventilation is performed efficiently.

  DESCRIPTION OF SYMBOLS 1 ... Mounting frame, 1a ... Cylindrical body, 1b ... Flange part, 3 ... Operation lever (operation means), 4 ... Connection lever (operation means), 6a-6c ... Shutter.

Claims (1)

A mounting frame that has a cylindrical body that is inserted through the wall, and that is attached by contacting the flange portion with the wall surface on the indoor side;
A plurality of shutters rotatably disposed in the cylindrical body and opening and closing the cylindrical body;
These shutters are opened and closed via a connecting lever that moves up and down by sliding movement of an operating lever, and by raising the connecting lever to an upper position, the shutter is forcedly opened at all times, and the connecting lever The shutter is moved to the middle position between the upper position and the lower position by moving the connecting lever to the middle position between the upper position and the lower position. And an operating means that opens when there is a pressure difference and closes when there is no pressure difference,
The natural supply port device, wherein the connecting lever is connected to the shutter when the shutter is fully opened and fully closed, and is disconnected from the shutter when the shutter is open.

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