U.S. patent application number 13/812966 was filed with the patent office on 2013-06-06 for ceiling-embedded ventilation fan.
This patent application is currently assigned to PANASONIC CORPORATION. The applicant listed for this patent is Hideki Hayashi, Taichi Kadono, Satoshi Kagawa. Invention is credited to Hideki Hayashi, Taichi Kadono, Satoshi Kagawa.
Application Number | 20130143481 13/812966 |
Document ID | / |
Family ID | 46515517 |
Filed Date | 2013-06-06 |
United States Patent
Application |
20130143481 |
Kind Code |
A1 |
Kagawa; Satoshi ; et
al. |
June 6, 2013 |
CEILING-EMBEDDED VENTILATION FAN
Abstract
In a ceiling-embedded ventilation fan, a connection opening is
formed in a side surface of a circuit case, an upper part of the
connection opening and a side surface of the circuit case are
covered with a shade, a bottom part of the shade is arranged at a
position lower than an insertion hole of the connection opening, a
drain board is arranged under the insertion hole in a frontal view
of the insertion hole viewed from an end face of the shade in
parallel with the top surface, and the drain board has a downward
slope from a side of the connection terminal to a side of the power
supply electric wire.
Inventors: |
Kagawa; Satoshi; (Aichi,
JP) ; Hayashi; Hideki; (Aichi, JP) ; Kadono;
Taichi; (Osaka, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Kagawa; Satoshi
Hayashi; Hideki
Kadono; Taichi |
Aichi
Aichi
Osaka |
|
JP
JP
JP |
|
|
Assignee: |
PANASONIC CORPORATION
Osaka
JP
|
Family ID: |
46515517 |
Appl. No.: |
13/812966 |
Filed: |
January 19, 2012 |
PCT Filed: |
January 19, 2012 |
PCT NO: |
PCT/JP2012/000292 |
371 Date: |
January 29, 2013 |
Current U.S.
Class: |
454/354 |
Current CPC
Class: |
F04D 25/12 20130101;
F24F 1/0022 20130101; F24F 7/10 20130101; F24F 13/222 20130101;
F24F 1/0047 20190201; F24F 1/0007 20130101 |
Class at
Publication: |
454/354 |
International
Class: |
F24F 7/10 20060101
F24F007/10 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 20, 2011 |
JP |
JP 2011-009652 |
Jan 25, 2011 |
JP |
JP 2011-012613 |
Claims
1. A ceiling-embedded ventilation fan comprising: a frame
configured by a top surface, a side surface and a lower surface,
and having a suction opening in the lower surface and a discharge
opening in the side surface; a motor fixed to the top surface; a
fan driven by the motor; a casing that covers a circumference of
the fan; a control circuit that is mounted on the top surface and
drives and controls the motor; and a circuit case that stores the
control circuit therein, wherein a side surface of the circuit case
has a connection opening for a connection terminal that connects
the control circuit and a power supply electric wire, an upper part
of the connection opening and the side surface of the circuit case
are covered with a shade, a bottom part of the shade is arranged at
a position lower than an insertion hole of the connection opening,
a drain board is arranged under the insertion hole in a frontal
view of the insertion hole viewed from an end face of the shade in
parallel with the top surface, and the drain board has a downward
slope from a side of the connection terminal to a side of the power
supply electric wire.
2. The ceiling-embedded ventilation fan according to claim 1,
wherein, in a space covered with the shade of the upper part of the
connection opening and the side surface of the circuit case, a wall
is arranged at a position between the insertion holes, the wall
extending from the side of the connection terminal to a side of the
drain board and from a level of the drain board to the shade, and
the wall is formed such that a thickness on the side of the
connection terminal is larger than a thickness on the side of the
drain board.
3. The ceiling-embedded ventilation fan according to claim 1,
wherein a drain hole is formed in the circuit case, and a rib has a
upward slope extending from an outlet port of the drain hole to the
inside of the circuit case.
4. A ceiling-embedded ventilation fan comprising: a frame
configured by a top surface, a side surface and a lower surface,
and having a suction opening in the lower surface and a discharge
opening in the side surface; a DC motor fixed to the top surface; a
fan driven by the DC motor; a fan casing that covers a
circumference of the fan; a control circuit that is mounted on the
top surface and drives and controls the DC motor; and a circuit
case that stores the control circuit therein, wherein the DC motor
includes a connector connecting unit connected to the control
circuit, and the connector connecting unit is arranged to be upward
perpendicularly to the top surface.
5. The ceiling-embedded ventilation fan according to claim 4
comprising a cover that covers the connector connecting unit and an
upper part of a connector connected to the connector connecting
unit.
6. The ceiling-embedded ventilation fan according to claim 5,
wherein the cover is formed integrally with the circuit case.
7. The ceiling-embedded ventilation fan according to claim 2,
wherein a drain hole is formed in the circuit case, and a rib has a
upward slope extending from an outlet port of the drain hole to the
inside of the circuit case.
Description
TECHNICAL FIELD
[0001] The present invention relates to a ceiling-embedded
ventilation fan.
BACKGROUND ART
[0002] In a conventional ceiling-embedded ventilation fan,
connection terminals are covered with a wall against drippages
infiltrating from a roof space, and an insertion hole for the
connection terminals is formed at an inner position. (Refer to PTL
1, for example). A conventional ceiling-embedded ventilation fan
will be described below with reference to FIGS. 14 to 17.
[0003] FIG. 14 is an exploded perspective view showing a
configuration of a conventional ceiling-embedded ventilation fan
disclosed in PTL 1, and FIG. 15 is a perspective view of the
ceiling-embedded ventilation fan. As shown in FIGS. 14 and 15, the
ceiling-embedded ventilation fan includes frame 103, motor 104, fan
105, casing 106, dressed panel 107, control circuit 108, and
circuit case 109.
[0004] Frame 103 has suction opening 101 corresponding to an
opening in a ceiling board and formed in a lower surface, and has
discharge opening 102 in a side surface. Motor 104 is fixed to a
top surface of frame 103. Fan 105 is driven by motor 104. Casing
106 covers the circumference of fan 105. Dressed panel 107 is
detachably mounted to cover the opening in the lower surface of
frame 103 from a room side. Control circuit 108 is mounted on the
top surface of frame 103 to drive and control motor 104. Circuit
case 109 stores control circuit 108 therein.
[0005] FIG. 16 is a view showing a periphery of a connection
opening of the circuit case of the conventional ceiling-embedded
ventilation fan. On a side surface of circuit case 109, connection
terminal 110 that connects control circuit 108 and power supply
electric wire 113 to each other is arranged. An upper portion of
connection terminal 110 is covered with shade 111, and insertion
hole 112 of connection terminal 110 is arranged at an inner
position.
[0006] As shown in FIG. 16, in the conventional ceiling-embedded
ventilation fan, dew condensation water 115 going down along power
supply electric wire 113 adheres to bottom part 114 of the shade
and remains thereon. Dew condensation water 115 may infiltrate in
connection terminal 110.
[0007] PTL 2 describes a connector connecting unit to be connected
to a control circuit of a ceiling-embedded ventilation fan. FIG. 17
is an exploded view showing a DC motor of the conventional
ceiling-embedded ventilation fan disclosed in PTL 2. As shown in
FIG. 17, connector connecting unit 157 formed on DC motor 155 is
arranged in parallel with top board 116 shown in FIG. 14. Connector
connecting unit 157 is connected to control circuit 108 shown in
FIG. 14.
[0008] In the conventional ceiling-embedded ventilation fan, as
shown in FIG. 14, since control circuit 108 for controlling DC
motor 155 is complicated and large in size, control circuit 108
cannot be disadvantageously mounted in an internal space of frame
103. Furthermore, since a ceiling-embedded ventilation fan is
required to be reduced in size, the area of frame 103 on the top
surface becomes small to make it disadvantageously difficult to
mount circuit case 109 on the top surface.
CITATION LIST
Patent Literature
[0009] PTL 1: Unexamined Japanese Patent Publication No.
2010-164202 [0010] PTL 2: Unexamined Japanese Patent Publication
No. 2010-164253
SUMMARY OF THE INVENTION
[0011] A ceiling-embedded ventilation fan according to the present
invention includes a frame configured by a top surface, a side
surface, and a lower surface and having a suction opening in the
lower surface and a discharge opening in the side surface, a motor
fixed to the top surface, a fan driven by the motor, a casing that
covers a circumference of the fan, a control circuit that is
mounted on the top surface and drives and controls the motor, and a
circuit case that stores the control circuit therein, wherein a
side surface of the circuit case has a connection opening for a
connection terminal that connects the control circuit and a power
supply electric wire, an upper part of the connection opening and
the side surface of the circuit case are covered with a shade, a
bottom part of the shade is arranged at a position lower than an
insertion hole of the connection opening, a drain board is arranged
under the insertion hole in a frontal view of the insertion hole
viewed from an end face of the shade in parallel with the top
surface, and the drain board has a downward slope from a side of
the connection terminal to a side of the power supply electric
wire.
[0012] With the above configuration, waterdrops going down along
the power supply electric wire is brought into contact with the
drain board, grow up, go down along the slope of the drain board,
and fall down to the top surface of the lower frame. For this
reason, dew condensation water can be prevented from infiltrating
in the power supply terminal.
[0013] A ceiling-embedded ventilation fan according to the present
invention includes a frame configured by a top surface, a side
surface, and a lower surface and having a suction opening in the
lower surface and a discharge opening in the side surface, a DC
motor fixed to the top surface, a fan driven by the DC motor, a fan
casing that covers a circumference of the fan, a control circuit
that is mounted on the top surface and drives and controls the DC
motor, and a circuit case that stores the control circuit therein,
wherein the DC motor includes a connector connecting unit connected
to the control circuit, and the connector connecting unit is
arranged to be upward perpendicularly to the top surface.
[0014] Since the connector connecting unit is upward
perpendicularly to the top surface of the frame, the connector is
perpendicular to the top surface when a connector is inserted. For
this reason, a used area on the top surface decreases, and the
circuit case is mounted on the top surface.
BRIEF DESCRIPTION OF DRAWINGS
[0015] FIG. 1 is an exploded perspective view showing a
configuration of a ceiling-embedded ventilation fan according to a
first embodiment of the present invention.
[0016] FIG. 2 is a frontal view of an insertion hole of a
connection terminal of the ceiling-embedded ventilation fan.
[0017] FIG. 3 is a view showing an interior of the ceiling-embedded
ventilation fan.
[0018] FIG. 4 is a view showing a flow of water going down along a
power supply electric wire of the ceiling-embedded ventilation
fan.
[0019] FIG. 5 is a view of a circuit case of the ceiling-embedded
ventilation fan when viewed from the bottom.
[0020] FIG. 6 is a view showing a periphery of a drain hole of the
circuit case of the ceiling-embedded ventilation fan.
[0021] FIG. 7 is an exploded view showing a configuration of a
ceiling-embedded ventilation fan according to a second embodiment
of the present invention.
[0022] FIG. 8 is a top view showing a configuration of the
ceiling-embedded ventilation fan.
[0023] FIG. 9 is a view showing a connector connecting unit of a DC
motor of the ceiling-embedded ventilation fan.
[0024] FIG. 10 is a perspective view of the DC motor of the
ceiling-embedded ventilation fan.
[0025] FIG. 11 is an exploded view showing a configuration of a
circuit case of the ceiling-embedded ventilation fan.
[0026] FIG. 12 is a detail view showing a height of a connector
connecting unit of the ceiling-embedded ventilation fan.
[0027] FIG. 13 is a perspective view showing an internal
configuration of a circuit case of the ceiling-embedded ventilation
fan.
[0028] FIG. 14 is an exploded perspective view showing a
configuration of a conventional ceiling-embedded ventilation
fan.
[0029] FIG. 15 is a perspective view of the ceiling-embedded
ventilation fan.
[0030] FIG. 16 is a view showing a periphery of a connection
opening of a circuit case of the ceiling-embedded ventilation
fan.
[0031] FIG. 17 is an exploded view showing a DC motor of the
ceiling-embedded ventilation fan.
DESCRIPTION OF EMBODIMENTS
[0032] Embodiments of the present invention will be described below
with reference to the accompanying drawings.
First Embodiment
[0033] FIG. 1 is an exploded perspective view showing a
configuration of a ceiling-embedded ventilation fan according to a
first embodiment of the present invention. The ceiling-embedded
ventilation fan shown in FIG. 1 is fitted in a roof space (not
shown) of a room by being embedded in the roof space. The
ceiling-embedded ventilation fan includes frame 3, motor 5, fan 6,
casing 7, dressed panel 8, control circuit 9, and circuit case 10.
Frame 3 includes top surface 4, side surface 23, and lower surface
24. Frame 3 has suction opening 1 corresponding to an opening of a
ceiling board in lower surface 24 and has discharge opening 2 in
side surface 23. Motor 5 is fixed to top surface 4 of frame 3 with
two screws, and receives a DC current. Fan 6 is a sirocco fan
driven by motor 5. Casing 7 covers the circumference of fan 6.
Dressed panel 8 is fitted to cover suction opening 1 from a room
side and detachably mounted with spring 21. Control circuit 9 is
mounted on top surface 4 and adjusts a voltage applied to motor 5
to drive and control a rotating speed of motor 5. Circuit case 10
stores control circuit 9 therein.
[0034] FIG. 2 is a frontal view of an insertion hole of connection
terminals of the ceiling-embedded ventilation fan according to the
first embodiment of the present invention, and FIG. 3 is a view
showing an interior of the ceiling-embedded ventilation fan. As
shown in FIGS. 2 and 3, in side surface 25 of the circuit case,
connection opening 13 of connection terminal 12 that connects
control circuit 9 and power supply electric wire 11 to each other
is formed. An upper part of U-shaped connection opening 13 and side
surface 25 of the circuit case are covered with shade 14. Bottom
part 14a of shade 14 also serves as top surface 4. Bottom part 14a
is arranged at a position lower than insertion hole 15 for
connection opening 13, and space 26 is present under shade 14.
[0035] Four insertion holes 15 for connection terminals 12 are
formed to adjust a speed of motor 5. Furthermore, in a frontal view
of insertion hole 15 viewed from end face 16 of shade 14 in
parallel with top surface 4, drain board 17 is arranged under
insertion hole 15. A thickness of drain board 17 on the connection
terminal 12 side has a slope obtained by making the thickness
larger than that on the opposite side. More specifically, drain
board 17 has a downward slope from the side of connection terminals
12 to the side of power supply electric wire 11.
[0036] FIG. 4 is a view showing a flow of water going down along
the power supply electric wire of the ceiling-embedded ventilation
fan according to the first embodiment of the present invention. As
shown in FIG. 4, when dew condensation water 22 generated in the
roof space goes down along power supply electric wire 11, dew
condensation water 22 is brought into contact with drain board 17
to increase waterdrops in size. Dew condensation water 22 goes down
along the slope of drain board 17 and drops down to top surface 4,
or drops down to the lower part of shade 14, i.e., to top surface
4. Since top surface 4 is located under insertion hole 15 to have a
long distance to insertion hole 15, the water does not reach the
level of insertion hole 15 to prevent water from infiltrating in
connection terminals 12.
[0037] FIG. 5 is a view of a circuit case of the ceiling-embedded
ventilation fan according to the first embodiment of the present
invention when viewed from the bottom. As shown in FIGS. 2 and 5,
wall 18 is arranged inside shade 14 to partition insertion hole 15
from the level of drain board 17 to shade 14 thereabove. More
specifically, in space 26 surrounded by the upper part of
connection opening 13 and side surface 25 of the circuit case and
covered with shade 14, wall 18 is arranged to extend from the level
of drain board 17 to shade 14. Wall 18 is made thicker on the
connection terminal 12 side than on the opposite side to obtain a
slope. More specifically, wall 18 is arranged at a position between
insertion hole 15 and wall 18 extending from the side of connection
terminal 12 to the side of drain board 17. A thickness of wall 18
on the side of connection terminal 12 is larger than that on the
side of drain board 17. As a result, when power supply electric
wire 11 is connected to connection terminal 12, a distal end of
power supply electric wire 11 is in contact with wall 18 to make it
easy to insert the distal end of power supply electric wire 11 into
insertion hole 15. More specifically, a problem of difficult
connection of power supply electric wire 11 posed when shade 14 is
arranged to hide insertion hole 15 from view can be solved.
[0038] FIG. 6 is a view of a periphery of a drain hole of a circuit
case of the ceiling-embedded ventilation fan according to the first
embodiment of the present invention. As shown in FIG. 6, drain hole
19 is formed at a position under connection terminal 12 in circuit
case 10. Rib 20 is formed to have a upward slope extending from
outlet port 19a of drain hole 19 to the inside of circuit case 10.
With this configuration, when an amount of dew condensation water
22 generated inside circuit case 10 becomes a predetermined amount
or more, dew condensation water 22 goes down along rib 20 and is
discharged to the outside of circuit case 10. Since water that
drops down from drain board 17 does not easily infiltrate in
circuit case 10, the water is prevented from adhering to control
circuit 9 in circuit case 10.
Second Embodiment
[0039] FIG. 7 is an exploded view showing a configuration of a
ceiling-embedded ventilation fan according to a second embodiment
of the present invention. The ceiling-embedded ventilation fan
shown in FIG. 7 is fitted in a roof space of a room by being
embedded in the roof space. The ceiling-embedded ventilation fan
includes frame 53, DC motor 55, centrifugal blowing fan 56, fan
casing 57, dressed panel 58, control circuit 59, and circuit case
60. Connector connecting unit 61 connected to control circuit 59 is
arranged on DC motor 55. Connector connecting unit 61 is arranged
to be upward perpendicularly to top surface 54 of frame 53.
[0040] Frame 53 includes top surface 54, side surface 83, and lower
surface 84. Frame 53 has suction opening 51 corresponding to an
opening in a ceiling board and formed in lower surface 84, and has
discharge opening 52 in side surface 83. DC motor 55 is fixed to
top surface 54 of frame 53. Centrifugal blowing fan 56 is driven by
DC motor 55. Fan casing 57 covers the circumference of centrifugal
blowing fan 56. Dressed panel 58 is detachably mounted on frame 53
to cover the opening in the lower surface of frame 53 from the room
side. Control circuit 59 is mounted on top surface 54 to drive and
control DC motor 55. Circuit case 60 stores control circuit 59
therein.
[0041] FIG. 8 is a top view showing a configuration of the
ceiling-embedded ventilation fan according to the second embodiment
of the present invention. As shown in FIG. 8, screw portion 62 is
formed on DC motor 55. Screw portions 62 are arranged such that a
line that connects connector connecting unit 61 to the center of DC
motor 55 is orthogonal to a straight line that connects two screw
portions 62. DC motor 55 is fixed to top surface 54 at screw
portions 62 with two screws. Control circuit 59 is formed to
surround the circumference of DC motor 55 in a U shape. Connector
portion 63 formed on control circuit 59 is arranged near connector
connecting unit 61 of DC motor 55.
[0042] Circuit case 60 is formed in the same shape as that of
control circuit 59. Screw clamp portions 64 at two positions on
diagonal lines of top surface 54 are arranged outside an outline of
centrifugal blowing fan 56, and circuit case 60 is fixed to top
surface 54 by using screws.
[0043] DC motor 55 is diagonally fitted on straight line portion 65
of circuit case 60. A gap between circuit case 60 and DC motor 55
is minimized, and a project area obtained when circuit case 60 is
viewed from the top is made smaller than that of top surface 54. On
top surface 54, connector connecting unit 61 and cover 68 that
covers an upper part of connector 73 connected to connector
connecting unit 61 are arranged.
[0044] FIG. 9 is a view showing a connector connecting unit of the
DC motor of ceiling-embedded ventilation fan according to the
second embodiment of the present invention, and FIG. 10 is a
perspective view of the DC motor of the ceiling-embedded
ventilation fan. As shown in FIGS. 9 and 10, connector connecting
unit 61 has four connector pins 66 arranged to be upward
perpendicularly (illustrated by an arrow in FIG. 9) to top surface
54, and has locking portion 67. Connector portion 63 of control
circuit 59 shown in FIG. 8 and connector connecting unit 61 are
connected to each other by using connector pin 66 and locking
portion 67.
[0045] FIG. 11 is an exploded view showing a configuration of the
circuit case of ceiling-embedded ventilation fan according to the
second embodiment of the present invention. As shown in FIG. 11,
circuit case 60 includes lower case 69 and upper case 70. Lower
case 69 and upper case 70 are engaged with lower locking portion 71
arranged on lower case 69 and upper engaging portion 72 arranged on
upper case 70 and fixed. Lower locking portion 71 and upper
engaging portion 72 are arranged outside circuit case 60.
[0046] FIG. 12 is a detail view showing a height of a connector
connecting unit of the ceiling-embedded ventilation fan according
to the second embodiment of the present invention, and FIG. 13 is a
perspective view showing an internal configuration of the circuit
case of the ceiling-embedded ventilation fan. As shown in FIGS. 12
and 13, cover 68 and circuit case 60 share upper case 70 and side
wall 75 and are integrated with each other. Cover 68 includes side
surface portion 76, and side surface portion 76 is arranged to
surround the circumference of DC motor 55 shown in FIG. 10.
[0047] Circuit case 60 and cover 68 have the same level. In order
to prevent lead wire 74 for connecting a connector in connection of
connector 73 from being forcibly bent, the levels of circuit case
60 and cover 68 are set to be about 1.5 times a height H (shown in
FIG. 12) from top surface 54 to the root of lead wire 74. Lead wire
74 mentioned here is exposed from connector 73.
[0048] According to the above configuration, connector connecting
unit 61 is not on a level with top surface 54 but is upward
perpendicularly to top surface 54. For this reason, since connector
73 is upward perpendicularly to top surface 54 when connector 73 is
inserted so as to reduce a used area on top surface 54, control
circuit 59 can be mounted in a space on top surface 54.
[0049] Connector connecting unit 61 is covered with cover 68. For
this reason, for example, even though dew condensation water drops
down from the ceiling, since the dew condensation water adheres to
cover 68, the dew condensation water does not adhere to connector
connecting unit 61. Since cover 68 covers the circumference of DC
motor 55, even though dew condensation water intends to flow from a
position other than the upper part of DC motor 55, the water does
not adhere to connector connecting unit 61. As a result, tracking
or the like does not occur in an electric connection unit to
improve safety.
[0050] Circuit case 60 and cover 68 are integrally formed. Since a
side surface part of cover 68 is shared with circuit case 60, an
excess space is reduced. Since a gap such as a seam is eliminated,
water can be completely prevented from being infiltrated.
[0051] As shown in FIG. 8, in a project area obtained when the
ceiling-embedded ventilation fan is viewed from the top, circuit
case 60 is smaller than top surface 54. For this reason, DC motor
55 and top surface 54 are removed from the room side together with
fan casing 57. As a result, DC motor 55 is easily removed when
motors are exchanged so as to improve ease of maintenance.
[0052] Screw clamp portion 64 of circuit case 60 is arranged
outside the outline of centrifugal blowing fan 56. For this reason,
since a screw to fix circuit case 60 can be prevented from being in
contact with centrifugal blowing fan 56, safety is improved.
[0053] As shown in FIG. 11, lower locking portion 71 and upper
engaging portion 72 are arranged outside circuit case 60. For this
reason, a gap between DC motor 55 and circuit case 60 can be
narrowed, and a used area on top surface 54 is reduced.
[0054] As shown in FIG. 12, since circuit case 60 and cover 68 are
formed at the same level, resin molding can be easily performed.
Since upper surfaces of circuit case 60 and cover 68 become flat,
labeling and imprinting on the upper surface of circuit case 60 can
be performed.
[0055] Cover 68 covers connector 73 and lead wire 74 connected to
connector connecting unit 61 from the top and the side surface. For
this reason, lead wire 74 is not bitten by a mouse or the like in
the roof space, electric leakage or the like does not occur, and
safety is improved.
INDUSTRIAL APPLICABILITY
[0056] A ceiling-embedded ventilation fan according to the present
invention is embedded in a ceiling and used, and is widely useful
to an air-conditioner to which power supply electric wires are
directly connected.
REFERENCE MARKS IN THE DRAWINGS
[0057] 1, 51 suction opening [0058] 2, 52 discharge opening [0059]
3, 53 frame [0060] 4, 54 top surface [0061] 5 motor [0062] 6 fan
[0063] 7 casing [0064] 8, 58 dressed panel [0065] 9, 59 control
circuit [0066] 10, 60 circuit case [0067] 11 power supply electric
wire [0068] 12 connection terminal [0069] 13 connection opening
[0070] 14 shade [0071] 14a bottom part [0072] 15 insertion hole
[0073] 16 end face [0074] 17 drain board [0075] 18 wall [0076] 19
drain hole [0077] 19a outlet port [0078] 20 rib [0079] 21 spring
[0080] 23, 83 side surface [0081] 24, 84 lower surface [0082] 25
side surface of circuit case [0083] 55 DC motor [0084] 56
centrifugal blowing fan [0085] 57 fan casing [0086] 61 connector
connecting unit [0087] 62 screw portion [0088] 63 connector portion
[0089] 64 screw clamp portion [0090] 65 straight line portion
[0091] 66 connector pin [0092] 67 locking portion [0093] 68 cover
[0094] 69 lower case [0095] 70 upper case [0096] 71 lower locking
portion [0097] 72 upper engaging portion [0098] 73 connector [0099]
74 lead wire [0100] 75 side wall [0101] 76 side surface portion
* * * * *