JPH0526424Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a pipe ventilation fan that is inserted and installed into a pipe installed in an opening in a wall or ceiling.

[Prior art] This type of conventional ventilation fan described above is, for example,
The configuration is as disclosed in Japanese Patent No. -122247. That is, a leaf spring that elastically expands and contracts in the radial direction is provided on the outer periphery of a cylindrical frame that incorporates a drive motor and a fan, and is supported within the pipe by the expansion spring force of this leaf spring. . A recess is formed in the flange portion formed on the front surface of the frame, and a wiring box is fixed to this recess.

The above-mentioned conventional pipe ventilation fan is attached by pushing a frame into a pipe and tightening screws to a mounting wall, and the electrical wiring is bundled in a wiring box and stored in a recess.

[Problem to be solved by the invention] In the above-mentioned conventional pipe ventilation fan, if the pipe protrudes from the wall surface of the mounting wall, the recess that fixes the wiring box will collide with the protruding part of the pipe. Cannot be installed without removing parts. In addition, since the power cord passes through the gap between the main unit and the pipe, it is difficult to insert it into the pipe of the frame, and when the power cord is removed for cleaning etc., there is little room for the power cord wired in the wiring box. , there are issues that need to be solved, such as the difficulty of rewiring.

This invention was made in order to solve such conventional problems, and provides a pipe ventilation fan that can be installed as is even if the pipe protrudes from the wall surface of the mounting wall, and that makes it easy to handle the power cord during cleaning. The purpose is to

[Means for Solving the Problems] A pipe ventilation fan according to this invention has a substantially cylindrical frame that surrounds the fan, and the suction end side thereof is expanded into a bell mouth shape, and a rectangular flange portion that extends in the radial direction. A rising part is provided on the periphery of this flange part that protrudes to the rear side, and a storage part with a cover for storing a capacitor, which is a circuit component of the power supply circuit of the drive motor, is provided on the back side of the flange part. A recess with a cord insertion hole formed at the bottom is provided on the front side of the flange on the opposite side of the storage part at a position outside the outside diameter of the pipe, and the A terminal for wiring connection is provided at a location away from the cord insertion hole.

[Function] In this invention, the rising part of the frame creates a gap between the wall surface of the mounting wall and the flange part on the suction end side that will not be crushed even by the storage part and the recessed part, which prevents the pipe from protruding. However, it will fit within this interval. The capacitor can be stored and protected in the housing part provided in a part of this gap, and wiring can be connected in the recessed part on the opposite front surface. In addition, since the terminal is spaced apart from the power cord insertion hole, the length of this portion of the power cord becomes longer, making it easier to operate and handle when reconnecting during cleaning.

[Example] Figures 1 to 4 all show a pipe ventilation fan as an example of the present invention. In the pipe ventilation fan shown in this example, the front part on the suction side that covers the outer circumference of the propeller fan 1 expands into a bell mouth shape and is formed with a rectangular flange part 2 extending in the radial direction. A drive motor 5 and a propeller fan 1 rotated by the drive motor 5 are assembled to a substantially cylindrical frame 4 integrally provided with a rising portion 3 projecting rearward at its end edge. Three motor mounting feet 6 are formed at equal intervals on the inner surface of the rear end of the frame 4. A channel 7 is integrally formed on the outer periphery of the frame 4 between two of the motor mounting legs 6 in the direction of the center line. The drive motor 5 has its mounting flanges joined to the end faces of three motor mounting legs 6, and is fixed by screwing from the rear. A motor lead 8 of the drive motor 5 is housed in a channel 7 of the frame 4 and wired.

On a part of the back side of the flange portion 2 of the frame 4, a storage portion 10 with a cover for storing a capacitor 9, which is a circuit component of the power supply circuit of the drive motor 5, is configured with a size smaller than the vertical dimension of the rising portion 3. There is. The cover 11 of the storage section 10 closes the back surface of the storage section 10 by screwing the flange section 2 from the back side, and covers and protects the capacitor 9 . Further, on the front surface of the flange portion on the opposite side from the storage portion 10, a flange portion 2 is located where a recess 13 having a cord insertion hole 12 formed at the bottom is outside the outer diameter of the pipe 14.
It is located approximately in half of the A portion of the bottom of the recess 13 in which the cord insertion hole 12 is provided is formed into a locally raised bottom 15 . And this recess 13
A terminal 16 for wiring connection is arranged in a corner remote from the cord insertion hole 12, and the terminal 1
A ground terminal 17 is attached to the corner opposite to 6. Furthermore, mounting flanges 18 are formed at the four corners of the rising portion 3 for screwing the main body to the wall surface of the mounting wall. In addition, 19 in the figure is a leaf spring that supports the frame 4 within the pipe 14, and 20
is the ground crossover wire, 21 is the three-core power cord,
Reference numeral 22 indicates a decorative grill. Among these, the decorative grille 22 is attached to the front surface of the frame 4 so as to wrap around the rising portion 3 of the frame 4, is fixed to the frame 4 on the lower side with screws, and covers the recessed portion 13 of the frame 4 on the front surface.

As shown in FIG. 4, this pipe ventilation fan is inserted into the pipe 14 and mounted thereon, and screwed to the wall surface at the mounting flange 18. At this time, since the power cord 21 is routed from the outside of the pipe 14, it does not interfere with the pushing of the frame 4. In order to insert the power cord 21 into the cord insertion hole 12, the bottom of the part is raised and the bottom 15 is raised.
Since there is a gap between the cable and the wall, it is easy to misalign the code hole on the wall. Even if the pipe 14 protrudes from the wall surface, it can be attached because there is a gap that prevents it from being crushed by the storage section 10 and the recess 13. The electrical system can be housed in a well-organized manner by the storage section 10 provided in a part of this space and the recess 13 on the front surface opposite to the storage section 10. In addition, since the terminal 16 is located far away from the insertion hole of the power cord 21, the length of this part of the power cord 21 becomes longer, making it easier to handle when reconnecting during cleaning, and maintaining good insulation. sell.

[Effects of the invention] As is clear from the above description of the embodiments, the pipe ventilation fan of the present invention has a substantially cylindrical frame that covers the area around the fan, and the suction end side thereof expands into a bell mouth shape. A projecting rectangular flange portion is integrally formed, a rising portion is provided on the periphery of this flange portion that protrudes to the rear side, and a capacitor that is a circuit component of the power supply circuit of the drive motor is housed on the back side of the flange portion. A storage section with a cover is configured to be smaller than the standing dimension of the rising section, and a recess with a cord insertion hole formed at the bottom is placed on the front side of the flange section on the opposite side of the storage section at a position that is outside the outside diameter of the pipe. Since the terminal for wiring connection is arranged in the recess at a position away from the above-mentioned cord insertion hole, it can be installed even if the pipe protrudes, and the capacitor can be stored and protected in the storage part. Wiring connections can be made in the recess on the opposite front surface. In addition, since the terminal is spaced apart from the power cord insertion hole, the length of this portion of the power cord becomes longer, making it easier to operate and handle when reconnecting during cleaning.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the configuration of a pipe ventilation fan as an embodiment of the present invention with the decorative grill removed, Fig. 2 is a rear view thereof, and Fig. 3 is a perspective view of the main parts of the pipe ventilation fan. FIG. 4 is a sectional view of the installed state. In the figure, 1 is a propeller fan, 2
is a flange part, 3 is a rising part, 4 is a frame, 5 is a drive motor, 9 is a capacitor, 10 is a storage part, 11 is a cover, 12 is a cord insertion hole, 13
14 is a concave portion, 14 is a pipe, and 16 is a terminal. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] This is a pipe ventilation fan that is installed by being inserted into a pipe installed in an opening in a mounting wall, and the suction end side of a substantially cylindrical frame that covers the area around the fan expands into a bell mouth shape and extends in the radial direction. A rectangular flange part is integrally formed, a rising part is provided on the periphery of this flange part that protrudes to the rear side, and a cover is provided on the back side of the flange part to house a capacitor that is a circuit component of the power supply circuit of the drive motor. The storage section is configured to be smaller than the standing dimension of the rising section, and a recess with a cord insertion hole formed at the bottom is provided on the front surface of the flange section on the opposite side from the storage section at a position outside the outer diameter of the pipe. A pipe ventilation fan characterized in that a terminal for wiring connection is provided in the recess at a position remote from the cord insertion hole.