JP2017223432A - Ventilation fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To acquire a ventilation fan which is hardly restricted by an obstacle around a product installation position.SOLUTION: A ventilation fan includes: an impeller; an electric motor for rotationally driving the impeller; a body frame which has a cylindrical shape inserted from the indoor side in a conduit for communicating inside and outside of a room, which includes a flange protruding in a diameter expanding direction on an outer periphery of an indoor side opening, and which supports the electric motor inside the cylinder; a shutter frame 18 detachably installed on the indoor side of the flange; and a shutter blade 17 supported in the shutter frame and for opening/closing the indoor side opening of the body frame. The flange includes a plurality of hook parts 9a for sliding the shutter frame 18 in the direction orthogonal to the indoor side opening and for guiding it to an installation position, when mounting the shutter frame 18. The shutter frame 18 includes a notch 18k wider than the hook part 9a at a portion which is further on a tip 18m side in the sliding direction of mounting time than the hook part 9a, in a state of being installed in the mounting position.SELECTED DRAWING: Figure 24

Description

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

  A ventilating fan having a shutter that opens and closes a ventilation opening has a cylindrical wind tunnel that is inserted from the indoor side into a conduit that serves as an air passage through a room such as a pipe or a duct, and has an axial fan. The provided main body frame is provided in the wind tunnel. In the main body frame, a flange having a flat surface and extending in the diameter increasing direction is connected to 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. The shutter is for preventing outside air from flowing into the room when the ventilation fan is stopped, and is generally structured to be attached to and detached from the flange of the front structure. Further, the shutter is generally configured to open and close by a suction force of a solenoid and an elastic force of a spring (see, for example, Patent Document 1).

  Further, in the case where the shutter can be attached to and detached from the flange of the front structure portion of the ventilation fan, the shutter can be removed from the product body and cleaned. Since the shutter and body flange are designed to prevent wind leakage, the inflow of outside wind can be reduced even when the shutter is closed when the operation is stopped, and uncomfortable feeling due to outdoor air flowing into the room And the effect which can reduce the load of an air-conditioning apparatus is expectable (for example, refer patent document 2).

Japanese Patent Laying-Open No. 2006-343049 (Abstract, FIGS. 1 and 2) Japanese Patent Laying-Open No. 2015-158332 (Summary, FIG. 17, FIG. 18, FIG. 21, FIG. 22)

  In order to remove the shutter from the main body flange, it is necessary to slide the shutter frame to a position where it can be removed from a plurality of hooks provided on the main body flange and to remove it. In the invention disclosed in Patent Document 1, since the product needs to be separated from the right side of the main body to an obstacle such as a wall more than the sliding amount of the shutter frame with the product main body installed, the sliding amount of the shutter frame is secured. If it is installed in a position where it cannot, the shutter may not be removed from the main body flange.

  In addition, when the shutter is attached to the product, the procedure is the reverse of the above-described removal method. Therefore, there is a concern that the larger the slide amount of the shutter frame, the more difficult the product is assembled and attached after cleaning.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a ventilation fan that is not easily restricted by obstacles around the product installation position with respect to attachment and detachment of the shutter.

  In order to solve the above-described problems and achieve the object, the present invention is a cylindrical shape that is inserted from the indoor side into an impeller, an electric motor that rotationally drives the impeller, and a conduit that communicates indoors and outdoors. A flange extending in the radial direction is provided on the outer periphery of the opening on the indoor side, a main body frame that supports the electric motor inside the cylinder, a shutter frame that is detachably installed on the indoor side of the flange, and a main body frame that is supported by the shutter frame and A ventilating fan having a shutter blade that opens and closes an indoor side opening, and the flange has a plurality of hooks that slide the shutter frame in a direction perpendicular to the indoor side opening when the shutter frame is mounted to guide the mounting position A part. When the shutter frame is installed at the attachment position, the shutter frame is provided with a notch that is wider than the hook portion at the front end side in the sliding direction when attached.

  According to the present invention, there is an effect that it is possible to obtain a ventilation fan that is not easily restricted by obstacles around the product installation position with respect to the attachment / detachment of the shutter.

Sectional drawing of the side view of the ventilation fan which concerns on embodiment of this invention The front view of the ventilation fan which concerns on embodiment of this invention The rear view of the ventilation fan concerning an embodiment of the invention The rear view which shows the shutter of the ventilation fan which concerns on embodiment of this invention The front view which shows the shutter blade of the ventilation fan which concerns on embodiment of this invention The perspective view of the shutter frame of the ventilation fan which concerns on embodiment of this invention Enlarged view of part A in FIG. The perspective view of the shutter frame of the ventilation fan which concerns on embodiment of this invention Enlarged view of part B in FIG. The side view which shows the movable-axis insertion part of the movable rod of the ventilation fan which concerns on embodiment of this invention 4 is a cross-sectional view taken along line XI-XI in FIG. 4 showing a spring hooking portion and a spring storage portion of the ventilation fan according to the embodiment of the present invention. The 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. The perspective view in the state which removed the shutter frame of the main body of the ventilation fan which concerns on embodiment of this invention The front view of the shutter frame of the ventilation fan which concerns on embodiment of this invention The perspective view of the main body of the ventilation fan which concerns on embodiment of this invention The perspective view of the shutter frame of the ventilation fan which concerns on embodiment of this invention Sectional drawing in the part of the wind leak prevention level | step-difference structure part in the state which assembled | attached the main body and shutter frame of the ventilation fan which concerns on embodiment of this invention The perspective view which shows the slide attachment state of the shutter of the ventilation fan which concerns on embodiment of this invention The perspective view which expands and shows the F section in FIG. 18 of the ventilation fan which concerns on embodiment of this invention. The front view which expands and shows the F section in FIG. 18 of the ventilation fan which concerns on embodiment of this invention. The perspective view which expands and shows the E section in FIG. 18 of the ventilation fan which concerns on embodiment of this invention. The perspective view which shows the shutter blade flapping prevention structure of the ventilation fan which concerns on embodiment of this invention The perspective view which shows the inclination shape of the movable rod axial hole of the ventilation fan which concerns on embodiment of this invention The perspective view of the state which removed the makeup | decoration grill of the ventilation fan concerning embodiment of this invention The perspective view which removed the makeup | decoration grill which shows the state slid to the direction which removes a shutter from the main body of the ventilation fan concerning embodiment of this invention The perspective view which shows the state which removed fixation of the notch part of the shutter upper part from the hook part of the main body of the ventilation fan concerning embodiment of this invention.

  Hereinafter, a ventilation fan according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

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 indoors and outdoors and serves as an air passage, and is attached from the indoor side. In the ventilation fan according to the embodiment of the present invention, a main body 6 includes a resin main body frame 3 having a cylindrical wind tunnel 2 inserted into a pipe 1 or a duct. A blower 24 that is an axial fan composed of a propeller impeller 4 and an electric motor 5 is assembled to the main body frame 3. The ventilation fan according to the embodiment of the present invention includes a decorative grill 7, a shutter 16, and a solenoid 21 for opening the shutter 16.

  As shown in FIG. 1, the main body frame 3 is integrally formed with a front structure portion 26 at the mouth edge portion of the bell mouth-shaped opening 8 serving as a suction port at the front portion of the wind tunnel 2. The front structure portion 26 has a square or round flange 9 that has a flat surface and extends in the diameter-enlarging direction, and is formed at the edge of the flange 9 so as to protrude toward the back side and to be in contact with the wall surface on the indoor side. Part 10. In addition, a terminal block 23 that can be easily connected to an external power supply wire by a rotary structure is provided on the rear surface of the flange 9. The blower 24 is attached to a motor attachment structure portion 25 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 25 includes four legs 11 extending rearwardly along the center line direction of the wind tunnel 2 at intervals in the circumferential direction, and each leg. 11, and a motor cover 13 supported at the center of the wind tunnel 2 by the bridge portions 12. The four legs 11 are all on the inner side of the outer periphery of the wind tunnel 2. On the outer side of one of the four legs 11, a leaf spring 14 with a warp that elastically holds the main body 6 in the pipe 1 or duct serving as a conduit by a radially expanding elastic force is mounted. Yes. In the electric motor 5, a flange portion of the outer shell is screwed to the motor mounting structure portion 25, 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 rotating 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 26 of the main body frame 3, and is attached to the main body 6 by claw fitting. It is done.

  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 of the shutter frame of the ventilation fan according to the embodiment of the present invention. FIG. 6 shows a state in which the shutter frame 18 is viewed from the right rear side. FIG. 7 is an enlarged view of a portion A in FIG. FIG. 8 is a perspective view of the shutter frame of the ventilation fan according to the embodiment of the present invention. FIG. 8 shows a state in which the shutter frame 18 is viewed obliquely from the left rear. FIG. 9 is an enlarged view of a portion B in FIG. As shown in FIGS. 6, 7, 8 and 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. A hooking claw 18c and a hooking part 18d for attaching to the flange 9 are provided. The back side of the shutter frame shaft hole 18b is open, and insertion and attachment are possible by pressing the shafts 17a and 17b of the shutter blade 17 from the back side. However, the constricted portion 18f is provided so that the shaft 17a, 17b of the shutter blade 17 is not easily pulled out once after being inserted. In addition, between the shutter frame shaft holes 18a and between the shutter frame shaft holes 18b, there are shaft hole ribs 18h having R-shaped tips. 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 side 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.

  11 is a cross-sectional view taken along line XI-XI in FIG. 4 showing a spring hooking portion and a spring housing portion of the ventilation fan according to the embodiment of the present invention. FIG. 12 is a perspective view showing a state where 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. 4, 11 and 12, the spring 20 is a spiral spring and has ring-shaped portions 20 a that are hooked to hook portions 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. The movable shaft 17c of the shutter blade 17 is inserted into the movable rod shaft hole 19a.

  As shown in FIG. 11, the spring 20 is configured such that the ring-shaped portions 20 a at both ends are hooked by claws 18 c that are hook portions on the shutter frame 18 side and claws 19 b that are hook portions 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 19 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. 13 is a perspective view of the ventilation fan main body according to the embodiment of the present invention with the shutter frame removed. FIG. 14 is a front view of the shutter frame of the ventilation fan according to the embodiment of the present invention. As shown in FIGS. 13 and 14, 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. That is, in a state where the shutter frame 18 is arranged at the attachment position, the hooking portion 9a of the flange 9 engages with the hooking portion 18d of the shutter frame 18. The hooks 18d are provided at three locations on the top and bottom of the shutter frame 18 and on the tip side in the sliding direction when attached. Of the three hooks 9a, the upper and lower hooks 9a also function as a guide for guiding the shutter 16 by sliding it in the lateral direction, which is a direction perpendicular to the indoor opening of the main body frame 1. To do. That is, when the shutter frame 18 is mounted, the upper and lower two hook portions 9a slide the shutter frame 18 in a direction perpendicular to the indoor side opening of the main body frame 1 and guide it to the mounting position.

  As shown in FIG. 13, in the solenoid 21, the movable iron core and the movable iron core tip pin 22 attached to the tip of the movable iron core move in one direction when energized. The movable core tip pin 22 has a size protruding from the flange 9 of the main body frame 3.

  In the shutter 16, the movable iron core tip pin 22 pushes the movable rod pushing portion 19 e by the suction force of the solenoid 21 energized simultaneously with the start of the operation of the product, and the movable rod 19 slides in the direction of arrow H in FIG. The shutter blade 17 has a structure in which the shutter blade 17 rotates around the shafts 17a and 17b to the back side, which is the movable rod storage side, and opens. 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 suction force is lost, and the movable rod 19 slides in the direction of arrow G in FIG. . 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. 15 is a perspective view of the main body of the ventilation fan according to the embodiment of the present invention. C part in FIG. 15 is a wind leak prevention level | step-difference structure part. FIG. 16 is a perspective view of the shutter frame of the ventilation fan according to the embodiment of the present invention. D part in FIG. 16 is a wind leak prevention level | step-difference structure part. FIG. 17 is a cross-sectional view of the step portion of the wind leakage prevention step 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 FIG. 15 and FIG. 17, the flange 9 is provided with a step structure 9 b that suppresses air leakage from the gap with the shutter 16 at the end of the slide entrance side into which the shutter 16 enters. ing. Further, as shown in FIGS. 16 and 17, the shutter frame 18 is also provided with a step structure 18j that can contact the step structure 9b at 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 reduced, and the load on the air conditioning equipment can be reduced, thereby saving energy.

  FIG. 18 is a perspective view showing a slide mounting state of the shutter of the ventilation fan according to the embodiment of the present invention. 18 is a wind leak prevention part on the shutter frame 18 side, and F part in FIG. 18 is a wind leak prevention part on the flange 9 side. FIG. 19 is an enlarged perspective view showing an F portion in FIG. 18 of the ventilation fan according to the embodiment of the present invention. FIG. 20 is an enlarged front view showing a portion F in FIG. 18 of the ventilation fan according to the embodiment of the present invention. FIG. 21 is an enlarged perspective view showing an E portion in FIG. 18 of the ventilation fan according to the embodiment of the present invention. As shown in FIG. 18, the shutter 16 has a structure that is slid in the lateral direction and is attached, so that 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 in 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 wind leakage prevention rib 9c is formed in a Y-shape as shown in FIGS. 19, 20, and 21, and the web portion 9d of the wind leakage prevention rib 9c is recessed from the escape hole 18e so as to be hidden in the escape hole 18e. Also set to a low height. In addition, as shown in FIGS. 19 and 21, a rib 18 i is provided around the escape hole 18 e to come into contact with the wind leak prevention rib 9 c of the flange 9 and 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 due to the inflow of outside wind can be reduced, and the load on the air conditioning equipment can be reduced, thereby saving energy.

  As described above, the shutter 16 has a structure that opens by rotating around the shafts 17a and 17b of the shutter blade 17, so that there is a slight gap between the shafts 17a and 17b of the shutter blade 17 and the shutter frame shaft holes 18a and 18b. It is necessary to provide clearance. For this reason, the shafts 17a and 17b of the shutter blade 17 are slightly moved in the shutter frame shaft holes 18a and 18b.

  FIG. 22 is a perspective view showing the shutter blade flapping prevention structure of the ventilation fan according to the embodiment of the present invention. FIG. 23 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 the present embodiment, the shafts 17a and 17b of the shutter blade 17 have a diameter of φ2 ± 0.1 [mm]. The shutter frame shaft holes 18a and 18b have a diameter 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, the movable shaft 17c of the shutter blade 17 is sandwiched between the shaft sandwiching portion 18g of the shutter frame 18 and the shaft sandwiching portion 19d of the movable rod shaft hole 19a as shown in FIG. Suppresses fluttering.

  Further, as shown in FIG. 23, the shaft clamping portion 19d of the movable rod 19 has a flat surface 19f as a part of the portion that contacts 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.

  FIG. 24 is a perspective view of the ventilation fan according to the embodiment of the present invention with the decorative grille removed. In the ventilation fan of the present embodiment, a notch 18k is provided in the hooking portion 18d on the upper part of the shutter frame 18. The position of the notch 18k is opposite to the sliding direction for removing the shutter 16 from the flange 9 from the fitting portion between the hook portion 18d at the top of the shutter frame 18 and the hook portion 9a provided on the main body flange 9. It is a position that becomes a direction. The size of the notch 18k is larger than the hooking portion 9a and does not affect the amount of outside air flowing into the room when the ventilation fan is stopped. That is, when the shutter frame 18 is installed at the attachment position, the shutter frame 18 includes a notch 18k having a width wider than that of the hook portion 9a in a portion closer to the tip 18m in the sliding direction when attached than the hook portion 9a. .

  FIG. 25 is a perspective view with the decorative grill removed showing a state in which the shutter is slid in the direction of removing the shutter from the main body of the ventilation fan according to the embodiment of the present invention. FIG. 26 is a perspective view showing a state in which the notch portion at the upper part of the shutter is removed from the hook portion of the main body of the ventilation fan according to the embodiment of the present invention. When the shutter 16 is removed from the flange 9, if the shutter 16 is slid by a distance L in the direction of arrow I in FIG. 24 from the position shown in FIG. 24 to the position shown in FIG. 18k is located in the hooking portion 9a. That is, when the shutter 16 is slid by a distance L in the removing direction, the notch 18k provided in the upper part of the shutter frame 18 overlaps the hooking portion 9a. Accordingly, as shown in FIG. 26, the shutter frame 18 can be detached from the hook portion 9 a provided on the flange 9, and the shutter 16 can be detached from the main body 6.

  When removing the shutter 16 from the flange 9, it is necessary to project the shutter 16 from the flange 9 in the direction of arrow I by a distance R. At this time, the distance R is equal to the distance L that is the sliding amount of the shutter 16. If the notch 18k is not present, in order to remove the shutter 16, the shutter frame 18 is slid in the direction of arrow I until the tip 18m in the sliding direction when the shutter frame 18 is attached passes through the hooking portion 9a. Therefore, the amount of protrusion of the shutter 16 from the flange 9 is equal to the distance L ′. As is clear from FIG. 25, the slide amount L for removing the shutter frame 18 having the notch 18k is smaller than the slide amount L 'for removing the shutter frame 18 not having the notch 18k. Therefore, by providing the notch 18k in the upper part of the shutter frame 18, it is possible to remove the shutter 16 with a slide amount shorter than that of the ventilation fan using the shutter frame 18 not provided with the notch 18k.

  Further, when the shutter 16 is attached to the flange 9, the procedure is the reverse of the above-described attachment procedure. Therefore, the provision of the notch 18k allows the shutter 16 to be mounted on the main body with a shorter slide amount than the structure without the notch 18k. 6 can be attached.

  At that time, it is necessary to install the product at a distance R from the right side of the product body to the wall. However, since the distance R is reduced by providing the notch 18k, the product is also placed around obstacles such as walls. It can be installed.

  In the above description, the notch 18k is provided in the upper hooking portion 18d of the shutter frame 18, but the notch 18k wider than the hooking portion 9a is provided in the lower hooking portion 18d of the shutter frame 18. You may provide, and the notch 18k wider than the hook part 9a may be provided in both upper and lower hook parts 18d.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  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 step structure, 9c wind leakage prevention rib, 9d web Part, 10 rise 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, 18e relief hole, 18f constricted portion, 18g, 19d shaft clamping portion, 18h shaft hole rib, 18i rib, 18j stepped structure, 18k notch, 18m tip, 19 movable rod, 19a Movable rod shaft hole, 19c Spring storage part, 19e Movable rod pushing part, 19f Flat surface, 2 Spring, 20a ring-shaped portion, 21 a solenoid 22 the movable iron core tip pins, 23 terminal block.

Claims (3)

Impeller,
An electric motor for rotationally driving the impeller;
A main body frame that is inserted into the conduit that communicates the interior and the exterior from the indoor side, has a flange that extends in the diameter increasing direction on the outer periphery of the indoor side opening, and supports the electric motor in the cylinder;
A shutter frame detachably installed on the indoor side of the flange;
A ventilation fan having a shutter blade supported by the shutter frame and opening and closing the indoor side opening of the main body frame,
The flange includes a plurality of hooking portions that slide the shutter frame in a direction perpendicular to the indoor side opening when the shutter frame is mounted, and guide the shutter frame to an attachment position.
The shutter frame is provided with a notch wider than the hooking portion at a portion on the distal end side in the sliding direction at the time of mounting than the hooking portion when the shutter frame is installed at the mounting position. Ventilation fan. The flange includes the hooks at two locations in the vertical direction,
The ventilation fan according to claim 1, wherein the shutter frame includes the notch at an upper part and a lower part.   The ventilation fan according to claim 1 or 2, wherein the hooking portion guides the slide of the shutter frame in a lateral direction when the shutter frame is attached and detached.

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