JP6150745B2 - Ventilation fan - Google Patents

Description

  The present invention relates to a ventilation fan including a shutter that opens and closes a ventilation opening.

  This type of ventilation fan has a cylindrical wind tunnel that is inserted into a duct (pipe or duct) that communicates indoors and outdoors and serves as an air passage from the indoor side, and an electric motor having an axial fan is installed in the wind tunnel. A main body frame is provided. In the main body frame, a flange having a flat portion and extending in the radial direction is continuously provided on the outer periphery of the indoor opening of the wind tunnel. Further, the main body frame is provided with a rising portion whose end surface is in contact with the wall surface on the indoor side on the back surface of the end edge portion of the flange, and the front structure portion is constituted by the flange and the rising portion. A decorative grille is attached to the flange of the front structure portion by claw fitting.

  In such a thing, there is a thing provided with the shutter which opens and closes according to the operation and stop of a ventilation fan. This shutter prevents outside air from flowing into the room when the ventilation fan is stopped, and generally has a structure that can be attached to and detached from the flange of the front structure. Further, the shutter is generally configured to be opened and closed by a suction force of a solenoid and an elastic force of a spring. The shutter is composed of a shutter blade, shutter frame, rod, and spring. The shutter blade shafts on both sides are attached to the shutter frame, and the shutter blade movable shaft is inserted into the shaft hole of the rod and assembled. Is common. Further, since the shutter has a structure that opens by rotating about the axis of the shutter blade, it is necessary to provide a slight clearance between the axis of the shutter blade and the shaft hole of the shutter frame. For this reason, the shaft of the shutter blade can move slightly within the shaft hole of the shutter frame (see, for example, Patent Document 1).

JP 2006-343049 A (paragraph [0014], FIG. 7)

  However, in the case where a clearance is provided between the shaft of the shutter blade and the shaft hole of the shutter frame, when the shutter blade receives wind from the outside during product operation (when the shutter is opened), the shaft of the shutter blade Flutters in the shaft hole of the shutter frame and an abnormal sound is generated. Conventionally, no means for restricting the movement of the shaft of the shutter blade has been provided, and it has been impossible to suppress abnormal noise due to fluttering of the shutter blade.

  The present invention has been made to solve the above-described problems, and an object thereof is to suppress the generation of abnormal noise due to fluttering of the shutter blade.

  The ventilating fan according to the present invention attaches an electric motor having an impeller to a conduit communicating indoors and outdoors via a cylindrical main body frame inserted from the indoor side, and the outer periphery of the indoor side opening of the main body frame has a radial direction. In a ventilation fan with a flange that extends to the front and viewed from the indoor side of the flange, a shutter that opens and closes the inner opening of the main body frame, the shutter is provided rotatably on the shutter frame and the shutter frame. The shafts provided on both sides of the shutter blades are equipped with a plurality of shutter blades and a movable rod that transmits the suction force of the solenoid to the shutter blades and opens them, and also transmits the elastic force of the springs to the shutter blades as closing force. Connected to the shutter frame shaft hole provided on the shutter frame, the movable shaft provided on the shutter blade is movable on the movable rod. When the shutter is opened, the movable shaft of the shutter blade has a first shaft sandwiching portion provided in the shutter frame and a second shaft sandwiching portion provided in the movable rod shaft hole of the movable rod. The movement of the shutter blade is restricted.

  In the ventilation fan according to the present invention, the shutter frame, a plurality of shutter blades rotatably provided on the shutter frame, and the solenoid's suction force are transmitted to the shutter blade to be opened, and the spring elastic force is applied to the closing force. A movable rod that communicates to the shutter blade, and the shaft provided on both sides of the shutter blade is connected to the shutter frame shaft hole provided in the shutter frame, and the movable shaft provided on the shutter blade is the movable rod provided on the movable rod The movable shaft of the shutter blade is inserted into the shaft hole, and when the shutter is opened, the first shaft sandwiching portion provided in the shutter frame and the second shaft sandwiching portion provided in the movable rod shaft hole of the movable rod Because it is caught and the movement of the shutter blade is regulated, abnormalities caused by fluttering of the shutter blade The occurrence can be suppressed.

It is sectional drawing of the side view of the ventilation fan which concerns on embodiment of this invention. It is a front view of the ventilation fan which concerns on embodiment of this invention. It is a rear view of the ventilation fan which concerns on embodiment of this invention. It is a rear view which shows the shutter of the ventilation fan which concerns on embodiment of this invention. It is a front view which shows the shutter blade of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the shutter frame axis | shaft insertion part A of the ventilation fan which concerns on embodiment of this invention. FIG. 7 is an enlarged view of a shutter frame shaft insertion portion A in FIG. 6. It is a perspective view which shows the shutter frame shaft insertion part of the ventilation fan which concerns on embodiment of this invention. FIG. 9 is an enlarged view of a shutter frame shaft insertion portion in FIG. 8. It is a perspective view which shows the movable-axis insertion part of the movable rod of the ventilation fan which concerns on embodiment of this invention. It is a rear view which shows the shutter of the ventilation fan which concerns on embodiment of this invention. It is XX sectional drawing of FIG. 11 which shows the spring hook part and spring accommodating part of the ventilation fan which concern on embodiment of this invention. It is a perspective view which shows the state which decomposed | disassembled the movable rod and spring of the shutter of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the shutter frame attaching part of the main body of the ventilation fan which concerns on embodiment of this invention. It is a front view which shows the attachment part of the shutter frame of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the wind leak prevention level | step-difference structure part B of the main body of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the position of the wind leak prevention level | step-difference structure part of the shutter frame of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the air leak prevention level | step difference structure part of the state which assembled | attached the main body and shutter frame of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the slide attachment state of the shutter of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the wind leak prevention parts C and D of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which expands and shows the wind leak prevention part D of the main body of the ventilation fan which concerns on embodiment of this invention. It is a front view which expands and shows the wind leak prevention part D of the main body of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which expands and shows the wind leak prevention part C of the shutter of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the shutter blade flapping prevention structure of the ventilation fan which concerns on embodiment of this invention. It is a perspective view which shows the inclination shape of the movable rod axial hole of the ventilation fan which concerns on embodiment of this invention.

  Below, the ventilation fan based on this invention is demonstrated by illustration embodiment. In addition, this invention is not limited by the following embodiment.

FIG. 1 is a cross-sectional view of a ventilation fan according to an embodiment of the present invention as viewed from the side. FIG. 2 is a front view of the ventilation fan according to the embodiment of the present invention. FIG. 3 is a rear view of the ventilation fan according to the embodiment of the present invention.
As shown in FIG. 1, the ventilation fan according to the embodiment of the present invention is inserted into a conduit, for example, a pipe 1 or a duct, which communicates the interior and the exterior and serves as an air passage, and is attached from the interior side. In this ventilation fan, a main body 6 includes a resin-made main body frame 3 having a cylindrical wind tunnel 2 inserted into a pipe 1 or a duct. A blower (axial fan) composed of a propeller impeller 4 and an electric motor 5 is assembled to the main body frame 3. The ventilation fan also includes a decorative grill 7, a shutter 16, and a solenoid 21 (FIG. 3) for opening the shutter 16.

  As shown in FIG. 1, the main body frame 3 is integrally formed with a front structure portion at a mouth edge portion of a bell mouth-shaped opening 8 serving as a suction port at the front portion of the wind tunnel 2. The front structure portion has a substantially square (or round) flange 9 that has a flat portion and extends in the radial direction, and is formed at the end edge of the flange 9 so as to protrude toward the rear side and the end surface against the wall surface on the indoor side. And a rising portion 10 in contact therewith. Further, on the back surface of the flange 9, a terminal block 23 (FIG. 3) that can be easily connected to an external power supply wire with a rotary structure is provided. The blower is attached to a motor attachment structure provided on the outdoor side of the wind tunnel 2 of the main body frame 3.

  As shown in FIGS. 1 and 3, the motor mounting structure portion includes four leg portions 11 extending rearward along the center line direction of the wind tunnel 2 at intervals in the circumferential direction, and each leg portion 11. A bridging portion 12 extending radially inward from the end portion, and a motor cover 13 supported by the bridging portion 12 at the center of the wind tunnel 2 are provided. The four legs 11 are all on the inner side of the outer periphery of the wind tunnel 2, and the main body 6 is elastically held in the pipe 1 or the duct serving as a conduit by the radially expanding elasticity in one of the four legs 11. A leaf spring 14 with warping is attached. An electric motor 5 is screwed to the flange portion of the outer shell of the motor mounting structure, and the rotating shaft 15 protrudes from the tip of the motor cover 13 onto the center line of the wind tunnel 2. The impeller 4 is mounted on the rotary shaft 15 extending on the center line in the wind tunnel 2 of the electric motor 5 in a state where the impeller 4 is disposed in the wind tunnel 2.

  As shown in FIGS. 1 and 2, the decorative grill 7 has an inner structure that can cover the flange 9 and the rising portion 10 that are the front structure portion of the main body frame 3, and is attached to the main body 6 by claw fitting. .

FIG. 4 is a rear view showing the shutter of the ventilation fan according to the embodiment of the present invention.
As shown in FIG. 4, the shutter 16 includes a plurality of shutter blades 17, a shutter frame 18, a movable rod 19, and a spring 20.

FIG. 5 is a front view showing the shutter blade of the ventilation fan according to the embodiment of the present invention.
Each of the shutter blades 17 has the same shape and is rectangular as shown in FIG. 5, and shafts 17 a and 17 b attached to the shutter frame 18 are provided at both longitudinal ends. The shutter blade 17 is provided with a movable shaft 17c on one side of the shutter blade 17 for interlocking with the movement of the movable rod 19.

FIG. 6 is a perspective view showing the shutter frame shaft insertion portion A of the ventilation fan according to the embodiment of the present invention. FIG. 7 is an enlarged view of the shutter frame shaft insertion portion A of FIG. FIG. 8 is a perspective view showing a shutter frame shaft insertion portion of the ventilation fan according to the embodiment of the present invention. FIG. 9 is an enlarged view of the shutter frame shaft insertion portion of FIG.
As shown in FIGS. 6 to 9, the shutter frame 18 has a box shape and has shutter frame shaft holes 18a and 18b into which the shafts 17a and 17b of the shutter blade 17 are inserted, and a claw 18c for hooking the spring 20 and a flange. 9 has a hooking portion 18d for attachment to 9. The upper portion of the shutter frame shaft hole 18b is open, and the shaft 17a and 17b of the shutter blade 17 can be inserted and attached from above. However, a constricted portion 18f is provided so that the shaft 17a, 17b of the shutter blade 17 is not easily removed after being inserted once. Further, ribs 18h having tips of R shapes are formed between the shutter frame shaft holes 18a and between the shutter frame shaft holes 18b. As a result, the shafts 17a and 17b of the shutter blade 17 are not caught between the shafts, and the insertability into the shutter frame shaft holes 18a and 18b is improved.

FIG. 10 is a perspective view showing the movable shaft insertion portion of the movable rod of the ventilation fan according to the embodiment of the present invention.
As shown in FIG. 10, the movable rod 19 is a relay part between the solenoid 21 and the shutter blade 17, and has a movable rod shaft hole 19 a for inserting the movable shaft 17 c of the shutter blade 17 and a claw 19 b for hooking the spring 20.

FIG. 11 is a rear view showing the shutter of the ventilation fan according to the embodiment of the present invention. 12 is a cross-sectional view taken along line XX of FIG. 11 showing a spring hooking portion and a spring housing portion of the ventilation fan according to the embodiment of the present invention. FIG. 13 is a perspective view showing a state in which the movable rod and the spring of the shutter of the ventilation fan according to the embodiment of the present invention are disassembled.
As shown in FIGS. 11 to 13, the spring 20 is a spiral spring and has ring-shaped portions 20 a that are hooked to hooks such as claws at both ends.

  The shaft 17a of the shutter blade 17 is inserted into the shutter frame shaft hole 18a, the shaft 17b of the shutter blade 17 is inserted into the shutter frame shaft hole 18b, and the movable shaft 17c of the shutter blade 17 is inserted into the movable rod shaft hole 19a.

  As shown in FIG. 12, the spring 20 is configured such that the ring-shaped portions 20 a at both ends are hooked by a claw 18 c that is a hook portion on the shutter frame 18 side and a claw 19 b that is a hook portion on the movable rod 19 side. It has been. The movable rod 19 is housed in the shutter frame 18. Therefore, when the shutter 16 is attached to the flange 9 of the main body frame 3, the movable rod is not exposed. The spring 20 is housed in the spring housing portion 19 c of the movable rod 19. That is, since the spring 20 is covered with the shutter frame 18 and the movable rod 19 and is not exposed, the contact with the spring 20 at the time of cleaning and the outside of the spring 20 are not deteriorated without deteriorating the cleaning property of the shutter 16. From the dust can be suppressed.

FIG. 14 is a perspective view showing a shutter frame mounting portion of the main body of the ventilation fan according to the embodiment of the present invention. FIG. 15 is a front view showing a mounting portion of the shutter frame of the ventilation fan according to the embodiment of the present invention.
As shown in FIGS. 14 and 15, the shutter 16 is attached by hooking hook portions 18 d of the shutter frame 18 on three hook portions 9 a provided on the front surface of the flange 9 of the main body frame 3. Of the three hooks 9a, the upper and lower hooks 9a also function as guides for sliding the shutter 16 in the horizontal direction.

  As shown in FIG. 14, in the solenoid 21, the movable iron core and the movable iron core tip pin 22 attached to the tip thereof move in one direction by energization. The movable core tip pin 22 has a size protruding from the flange 9 of the main body frame 3.

  The shutter 16 is configured such that the movable iron core tip pin 22 pushes the movable rod pushing portion 19e by the suction force of the solenoid 21 energized simultaneously with the start of the operation of the product, and the movable rod 19 is slid to move the shutter blade 17 to the shaft 17a, It is structured to rotate and open to the movable rod storage side (back side) around 17b. At this time, the spring 20 is also pulled and maintained in an extended state. When the operation is stopped, since the solenoid 21 is not energized, the attractive force is lost, and the movable rod 19 slides in the opposite direction to the open state by the restoring force of the spring 20 maintained in the extended state. As a result, the shutter blade 17 rotates in the closing direction about the shafts 17a and 17b, and the shutter 16 is closed.

FIG. 16 is a perspective view showing a wind leakage prevention step structure portion B of the main body of the ventilation fan according to the embodiment of the present invention. FIG. 17 is a perspective view showing the position of the air leakage prevention step structure portion of the shutter frame of the ventilation fan according to the embodiment of the present invention. FIG. 18 is a perspective view showing the air leakage prevention step structure portion in a state where the main body of the ventilation fan and the shutter frame according to the embodiment of the present invention are assembled.
As shown in FIGS. 16 and 18, the flange 9 has a step that suppresses wind leakage from the gap with the shutter 16 at the wind leakage prevention step structure B, that is, the end portion on the slide entrance side where the shutter 16 enters. Structure 9b is provided. As shown in FIGS. 17 and 18, the shutter frame 18 is also provided with a step structure 18 j that abuts on the step structure 9 b on the back surface of the wind leakage prevention portion C, that is, the rear end portion in the approach direction. Thereby, the inflow of outdoor air into the room can be suppressed, the discomfort caused by the inflow of outside wind can be improved, and the load on the air conditioning equipment can be reduced, thereby saving energy.

FIG. 19 is a perspective view showing a slide mounting state of the shutter of the ventilation fan according to the embodiment of the present invention. FIG. 20 is a perspective view showing wind leakage prevention portions C and D of the ventilation fan according to the embodiment of the present invention. FIG. 21 is an enlarged perspective view showing the wind leakage prevention part D of the main body of the ventilation fan according to the embodiment of the present invention. FIG. 22 is an enlarged front view showing the wind leakage prevention portion D of the main body of the ventilation fan according to the embodiment of the present invention. FIG. 23 is an enlarged perspective view showing the wind leakage prevention portion C of the shutter of the ventilation fan according to the embodiment of the present invention.
As shown in FIG. 19, the shutter 16 has a structure that is slid and mounted in the lateral direction. Therefore, a relief hole for avoiding the movable core front end pin 22 at the side surface position on the front end side in the sliding direction of the shutter frame 18. 18e is provided. On the other hand, when viewed from the main body frame 3 side, the shutter 16 is located at the end position of the flange 9 where the shutter 16 slides, that is, at the position facing the escape hole 18e across the movable core tip pin 22 of the flange 9. The flange 9 is provided with a wind leak prevention rib 9c that suppresses the wind leak from the escape hole 18e when installed. The air leakage prevention rib 9c is formed in a Y shape as shown in FIGS. 20 to 22, and the web portion 9d is set at a height lower than the escape hole 18e so as to be buried in the escape hole 18e. ing. Further, as shown in FIGS. 20 and 23, a rib 18i is provided around the escape hole 18e to come into contact with the wind leak prevention rib 9c of the flange 9 to suppress the wind leak. The contact surfaces of the wind leak prevention rib 9c and the rib 18i are inclined with respect to each other. As a result, the inflow of outdoor air into the room can be further suppressed, the discomfort caused by the inflow of outside air can be reduced, and the load on the air conditioning equipment can be reduced, thereby saving energy.

  As described above, since the shutter 16 is structured to rotate around the shafts 17a and 17b of the shutter blade 17, the space between the shafts 17a and 17b of the shutter blade 17 and the shutter frame shaft holes 18a and 18b is slightly different. It is necessary to provide clearance. For this reason, the shafts 17a and 17b of the shutter blade 17 move slightly within the shutter frame shaft holes 18a and 18b.

FIG. 24 is a perspective view showing the shutter blade flapping prevention structure of the ventilation fan according to the embodiment of the present invention. FIG. 25 is a perspective view showing an inclined shape of the movable rod shaft hole of the ventilation fan according to the embodiment of the present invention.
In the ventilation fan of this embodiment, the shafts 17a and 17b of the shutter blade 17 have a diameter of φ2 ± 0.1 [mm], and the shutter frame shaft holes 18a and 18b have a diameter of φ2.3 ± 0.1 [mm]. Therefore, the shutter blade 17 may flutter due to wind from the outside and generate noise. Therefore, when the shutter 16 is opened, as shown in FIG. 24, the movable shaft 17c of the shutter blade 17 is provided in the shaft sandwiching portion 18g which is the first shaft sandwiching portion provided in the shutter frame 18 and the movable rod shaft hole 19a. Furthermore, the shutter blade 17 is prevented from fluttering by being pinched by the shaft pinching portion 19d which is the second shaft pinching portion.
Further, as shown in FIG. 25, the shaft sandwiching portion 19d of the movable rod 19 has a part of the flat surface 19f that is in contact with the movable shaft 17c of the shutter blade 17 when the shutter is opened, and the movable rod shaft hole 19a and the movable shaft 17c. The gap between was made small. Thus, the shaft clamping portion 19d of the movable rod 19 can securely clamp the movable shaft 17c of the shutter blade 17 regardless of the accuracy of the parts.

  1 pipe, 2 wind tunnel, 3 body frame, 4 impeller, 5 motor, 6 body, 7 decorative grille, 8 opening, 9 flange, 9a, 18d hook, 9b, 18j step structure, 9c wind leakage prevention rib, 9d Web part, 10 flange rising part, 11 leg part, 12 bridge part, 13 motor cover, 14 leaf spring, 15 rotating shaft, 16 shutter, 17 shutter blade, 17a, 17b axis, 17c movable axis, 18 shutter frame, 18a, 18b Shutter frame shaft hole, 18c, 19b Claw (hanging portion), 18e Relief hole, 18f Constricted portion, 18g Shaft clamping portion (first shaft clamping portion), 18h Rib between shaft holes, 18i rib, 19 Movable Rod, 19a Movable rod shaft hole, 19c Spring storage portion, 19d Shaft clamping portion (second shaft clamping portion), 19 e Movable rod pushing part, 19f Flat surface, 20 Spring, 20a Annular part, 21 Solenoid, 22 Movable core tip pin, 23 Terminal block, A Shutter frame shaft insertion part, B Air leakage prevention step structure part, C, D Air leakage Prevention part.

Claims (2)

An electric motor having an impeller is attached to a conduit that communicates indoors and outdoors via a cylindrical main body frame inserted from the indoor side, and a radially extending flange is provided on the outer periphery of the indoor side opening of the main body frame. The front surface of the flange viewed from the indoor side is provided with a ventilation fan provided with a shutter that opens and closes the indoor side opening of the main body frame.
The shutter is
Shutter frame,
A plurality of shutter blades rotatably provided on the shutter frame;
A movable rod that transmits the suction force of the solenoid to the shutter blade and opens it, and transmits the elastic force of the spring to the shutter blade as a closing force, and
A shaft provided on both sides of the shutter blade is connected to a shutter frame shaft hole provided in the shutter frame,
A movable shaft provided on the shutter blade is inserted into a movable rod shaft hole provided on the movable rod,
When the shutter is opened, the movable shaft of the shutter blade is sandwiched between a first shaft sandwiching portion provided in the shutter frame and a second shaft sandwiching portion provided in the movable rod shaft hole of the movable rod. The ventilation fan is characterized in that the movement of the shutter blade is restricted.   2. The ventilation fan according to claim 1, wherein when the shutter is opened, a part of a portion of the movable rod that comes into contact with the movable shaft of the shutter blade in the movable rod shaft hole is a flat surface.

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