JP2006219998A - Ceiling fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a DC motor-driven ceiling fan of which main body is small and outer shape has few irregularities and which prevents accumulation of dust and securely enables remote control operation and operation display. <P>SOLUTION: This ceiling fan has the outward-rotation type DC motor, a control part for controlling the DC motor, a plurality of rotor blades mounted to the outward rotation part of the DC motor, and a joint metal fitting for hanging from ceiling which is connected with a motor shaft of the DC motor. A first printed board and second printed board constituting the control part are superposed vertically, and are arranged in a peripheral part of the DC motor or joint metal fitting. Due to this, the small and light ceiling fan of which outer shape is slim and compact and which is easily installed can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ceiling fan provided with a DC motor used by being attached to a ceiling of a room.

  Ceiling fans used in combination with air conditioning equipment supply cool air from the ceiling in the summer, diffuse cold air that is biased to the floor during cooling, and are biased to the ceiling by reverse operation in the winter The function of moving warm air in the direction of the floor and making the indoor temperature uniform is comfortable and good for health, and is spreading due to the economic effect of energy-saving operation of air conditioning equipment.

  Conventionally, an AC motor has been used as a driving motor for a ceiling fan, but recently, a DC motor as shown in FIG. 6 is known because of its good controllability.

  Further, there is known a small fan in which a DC motor is employed and a drive circuit board is provided along with the DC motor (see, for example, Patent Document 1).

  However, since the DC motor eliminates the commutator (brush) having a problem with durability, the commercial power supply is turned into a direct current, and the transistor control current is passed through the induction coil that generates the rotating magnetic field. An electronic circuit for DC conversion is added.

FIG. 6 is an external view and a cross-sectional view of a conventional ceiling fan. A hanger fitting 101 is attached to the ceiling 1, a joint fitting 102 is attached to the fitting, and a motor shaft of an abduction type DC motor 104 is attached to the joint fitting 102. 103 is fixed. A printed circuit board 106 on which an electronic circuit is mounted is attached to the joint fitting 102.
Japanese Patent No. 3126325 (FIG. 1, paragraph [0009])

  Since such a conventional ceiling fan has an electronic circuit for DC conversion mounted on a printed circuit board, the outer shape of the ceiling fan protrudes into a convex shape, which reduces the ventilation area and inconveniences installation work. There is a demand for downsizing the external dimensions around the motor.

  In addition, since the printed circuit board has a large outer shape, there is a problem of lack of balance in the horizontal direction due to imbalance in the weight of electronic components to be mounted, and it is required to maintain the weight balance.

  Further, since electronic components that are high in temperature are mounted on the printed circuit board, there is a problem that if the size is reduced, the inside tends to become high temperature, and a structure that can efficiently dissipate heat is required.

  Moreover, in the ceiling of a Japanese house, the ceiling beam which suspends a ceiling fan is the intensity | strength which can support 10 kg-15 kg, and reducing the weight of a ceiling fan is requested | required.

  In addition, since it is difficult to determine the movement of the rotor blades during remote control operation, there is a need for a ceiling fan that can reliably perform remote control operation and operation confirmation from a distance.

  The present invention solves such a conventional problem, and provides a DC motor type ceiling fan having a small size, light weight and simple shape, good heat dissipation of electronic components, and good operability during operation. It is an object.

  In order to achieve the above object, the ceiling fan of the present invention is an abduction type DC motor, a control unit for controlling the DC motor, a plurality of rotor blades attached to the abduction unit of the DC motor, and the DC A joint bracket for hanging the ceiling connected to the motor shaft of the motor; the first printed circuit board and the second printed circuit board that constitute the control unit are vertically stacked; and the peripheral portion of the DC motor or the joint bracket Are arranged.

  By this means, the ceiling fan main body can be reduced in size in the horizontal direction, and a ceiling fan that can easily maintain a weight balance can be obtained.

  Another means is that the outer edges of the first printed circuit board and the second printed circuit board have an arc shape and have substantially the same outer dimensions.

  By this means, a ceiling fan can be obtained in which the outer shape of the main body cover that covers each printed circuit board can be a simple shape with few irregularities.

  Another means includes a printed circuit board mounting frame fixed to the joint metal fitting, and the first printed circuit board and the second printed circuit board are mounted on the printed circuit board mounting frame with the back surfaces of the printed circuit boards facing each other. It is.

  By this means, it is possible to obtain a ceiling fan in which the printed board mounting frame can maintain the insulation distance between the boards and shorten the vertical dimension.

  Another means is to collect and mount tall components having a large height on a second printed circuit board mounted below the printed circuit board mounting frame.

  By this means, only a low electronic component can be mounted on the first printed circuit board, and a ceiling fan that can further reduce the vertical dimension can be obtained.

  Another means is that a cutout is provided in the first printed board and the second printed board, a radiating fin is housed in the cutout, and a heat generating component that generates heat and becomes high temperature is attached to the radiating fin. It is.

  Another means is that the lid-like printed board cover and the pan-shaped body cover are directly attached to the printed board mounting frame so as to surround the first printed board and the second printed board. .

  In another means, an opening is provided in the lower part of the main body cover surrounding the second printed circuit board, and air is introduced from the gap between the opening and the DC motor.

  By these means, even if the shape of the main body cover containing the printed circuit board is reduced in size, a ceiling fan with good heat dissipation of electronic parts can be obtained.

  In another means, a display unit is provided at the bottom of the DC motor, and a display unit such as a light emitting diode indicating the operating state is provided on the display unit, and a photoreceiver such as a phototransistor that receives a signal from the remote control device. Is.

  Another means is that the display body has different emission colors depending on the rotation direction of the DC motor.

  Another means is that the display body blinks when the light receiving body receives a signal.

  By these means, it is possible to obtain a ceiling fan that can reliably perform remote control operation and operation confirmation even from a distance.

  According to the present invention, it is possible to provide a ceiling fan in which the outer dimensions around the motor are reduced, the ventilation resistance is low, the blowing efficiency is increased, and the weight balance is maintained and the operation can be stably performed.

  In addition, since the external appearance is cylindrical and small and light, the installation work can be facilitated and a ceiling fan excellent in interior can be provided.

  In addition, it is possible to provide a ceiling fan that can efficiently release the heat generated by the electronic component that becomes high temperature.

  It can also provide a ceiling fan that allows you to check the status of remote control operations from a distance.

  According to a first aspect of the present invention, an abduction type DC motor, a control unit for controlling the DC motor, a plurality of rotor blades attached to the abduction unit of the DC motor, and a motor shaft of the DC motor are provided. A joint bracket for hanging the ceiling connected to the first printed circuit board and the second printed circuit board constituting the control unit are vertically stacked and arranged on the peripheral edge of the DC motor or the joint bracket. It has the effect that the external dimensions around the DC motor can be made small and slim.

  According to a second aspect of the present invention, the outer edges of the first printed circuit board and the second printed circuit board have an arc shape and the outer dimensions are substantially the same, and the outer shape of the ceiling fan is a straight cylindrical shape with less irregularities. It has the effect that it can be brought close to.

  The invention of claim 3 includes a printed circuit board mounting frame fixed to the joint metal fitting, and the first printed circuit board and the second printed circuit board are mounted on the printed circuit board mounting frame with the back surfaces of the substrates facing each other. And has the effect of reducing the vertical dimension of the ceiling fan.

  According to the invention of claim 4, tall components having a large height are collected and mounted on a second printed circuit board mounted below the printed circuit board mounting frame. The first printed circuit board is integrated with low-profile components such as ICs and resistors, and the dead space is reduced, so the vertical dimension of the ceiling fan can be shortened. Has an effect.

  According to the invention of claim 5, a cutout portion is provided in the first printed circuit board and the second printed circuit board, a heat radiation fin is accommodated in the cutout portion, and a heat generation component that generates heat and becomes high temperature is attached to the heat radiation fin. The printed circuit board is separated from the high-temperature radiating fins through the air layer and does not receive the heat conduction of the radiating fins, so that the operation of the electronic circuit can be stabilized.

  According to a sixth aspect of the present invention, the illuminator is provided so as to be connectable to the motor shaft, and the radiating fin is provided with a thyristor for controlling the conduction phase of the illuminator, and the radiating fin of the thyristor for lighting control is separately provided. There is no need for it, and it has the effect of maintaining a small size and light weight by sharing parts.

  In the invention of claim 7, the lid-like printed board cover and the pan-shaped body cover are directly attached to the printed board mounting frame so as to surround the first printed board and the second printed board. The body portion is firmly assembled with the printed circuit board mounting frame as the center, and the first and second printed circuit boards are surrounded by the printed circuit board cover and the body cover, respectively, and can be protected from external mechanical shocks. .

  The invention of claim 8 has a structure in which an opening is formed in a lower part of a main body cover surrounding the second printed circuit board, and air is allowed to flow in through a gap between the opening and the DC motor. The fin cooling effect is improved, and the heat radiation fin can be reduced in size and weight.

  According to the ninth aspect of the present invention, a display unit is provided in the lower part of the DC motor, and a display unit such as a light emitting diode indicating an operating state is provided on the display unit, and a light receiver such as a phototransistor that receives a signal from the remote control device. Thus, the position of the light receiving body can be determined by the display body provided in the display section, and the transmission from the remote control device to the light receiving body can be reliably performed.

  In the invention of claim 10, the display body has a different emission color depending on the rotation direction of the DC motor, and the forward rotation or the reverse rotation of the rotary blade can be surely known from the color of the display body.

  In the eleventh aspect of the invention, the display body blinks when the light receiver receives a signal, and it is possible to visually recognize that the light receiver has received the operation of the remote control device from a distance. Have

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

(Embodiment 1)
As shown in FIGS. 1 to 5, a ceiling fan main body 2 is suspended from the ceiling 1, and a plurality of rotor blades 50 provided on the main body 2 can be rotated forward or backward by operating the remote control device 4. In addition, the rotation speed can be controlled.

  A hollow cylindrical joint fitting 20 is attached to the hanger fitting 10 attached to the ceiling 1 with wood screws, and a hollow rod-like motor shaft 30 of a DC motor 40 is fixed to the joint fitting 20. A plurality of rotor blades 50 are fixed to the rotor blade mounting frame 41 of the DC motor 40.

  Further, a printed circuit board mounting frame 60 is fixed to the joint metal fitting 20, a first printed circuit board 61 is fixed to the upper part of the printed circuit board mounting frame 60, a second printed circuit board 62 is fixed to the lower part, and the printed circuit board is further fixed. The cover 63 and the heat radiation fin 64 are fixed.

  The lower part 60 a of the printed board mounting frame 60 is formed in a cylindrical shape so as to cover the DC motor 40.

  A display unit 75 having a display unit mounting frame 80 is provided at the lowermost part of the motor shaft 30, and a light emitting diode 76 as a display body and a phototransistor 77 as a receiver are mounted on the display unit mounting frame 80. ing. The light emitting diode 76 displays the operating state of the ceiling fan, and the phototransistor 77 receives an infrared signal from the remote control device 4. The display unit cover 75 a of the display unit 75 is formed of a material having good transmittance of infrared rays and visible light, and is fixed to the display unit mounting frame cover 74.

  In addition, the hanger cover 71 is fixed to the hanger fitting 10, the main body cover 72 is fixed to the printed circuit board mounting frame 60, the rotary blade cover 73 is fixed to the rotary blade mounting frame 41, and the display unit cover 74 is displayed on the display unit mounting frame 80. Fixed to each.

  The main body cover 72 has an opening 72a for forming an air flow path at the lower part thereof, and the air flow flows in from a gap with the rotary blade cover 73 at the lower part of the main body cover 72 and radiates heat through the opening 72a. The fin 64 is cooled and flows out from the gap between the hanger cover 71 and the ceiling 1.

  Here, the electrical connection will be described. The commercial power is supplied to the second printed circuit board 62 of the joint bracket 20, and the connection to the DC motor 40 is performed through a hollow portion of the joint bracket 20 and the motor shaft 30 (see FIG. (Not shown). Further, the connection from the first printed circuit board 61 to the phototransistor 77 and the light emitting diode 76 is performed from the upper part of the joint fitting 20 through the hollow part of the motor shaft 30.

  As shown in FIG. 3A, the first printed circuit board 61 and the second printed circuit board 62 are screwed and fixed to the upper and lower sides of the printed circuit board mounting frame 60, and heat is generated on the side surface of the printed circuit board mounting frame 60. The radiating fin 64 to which the transistor array FET as the component 65 and the thyristor 65a are attached is fixed with screws.

  Further, a printed circuit board cover 63 and a main body cover 72 are fixed to the printed circuit board mounting frame 60, and the printed circuit boards 61 and 62 and the heat radiation fins 64 are protected by being wrapped by the printed circuit board cover 63 and the main body cover 72.

  Here, since the first printed circuit board 61 and the second printed circuit board 62 have the same outer shape in an arc shape, the main body case 72 for storing each printed circuit board has a substantially cylindrical shape and a straight outer shape in the vertical direction. Is something that can be done.

  The first printed circuit board 61 and the second printed circuit board 62 are mounted on the top and bottom of the printed circuit board mounting frame 60 with their back surfaces to be soldered facing each other, so that the insulation distance can be reliably maintained, and the dead space. The vertical dimension can be reduced.

  In addition, since the outer dimensions are reduced by dividing the printed circuit board, the volume of the main body 2 as a whole is small, and the material of the structural parts can be reduced and the weight can be reduced.

  The circuit configuration will be described here. As shown in FIG. 4, the commercial power supply is full-wave rectified by the diode bridge DB via the fuse F and the inrush current preventing resistor R, and the smoothing choke coil CH and the smoothing capacitor C And is supplied to the field effect transistor array 65 as a DC voltage. The hybrid IC for control power supply generates a low-voltage DC voltage from a DC power supply by a switching regulator type, and supplies the voltage to the FET drive IC and PWM for controlling the control unit and the transistor array 65.

  When the phototransistor 77 receives the infrared signal from the fan control remote control device 4, the control unit decodes the control content and transmits it to the FET drive IC and PWM.

  In PWM, a pulse is generated to drive a transistor array 65 composed of six transistors. The output of the transistor array 65 is applied to the stator coil of the DC motor 40, and a rotating magnetic field is generated to drive the DC motor 40. The rotation direction is determined by the order of the transistors driven by the PWM, and the rotation speed can be changed by changing the pulse period and width.

The induction coils L1 and L2 and the capacitors C1 and C2 form a filter circuit, and the transistor array 65 is provided to absorb high-frequency noise generated by the switching operation.

  The commercial power supply is applied to the phase controller through a filter circuit including induction coils L3 and L4 and capacitors C3 and C4. The phase control unit receives the infrared signal of the fan control remote control device 4 by the phototransistor 77 and controls the conduction phase of a thyristor (bidirectional three-terminal thyristor) 65a such as a triac. The illuminator 66 is controlled by the thyristor 65a. Illuminance is adjusted. The filter circuit absorbs high frequency noise generated by the switching operation of the thyristor 65a.

  Here, as shown by the dotted frame in the figure, the first printed circuit board 61 is equipped with components constituting the control unit, PWM, and phase control unit, and the second printed circuit board 62 is equipped with a noise filter circuit and DC smoothing. Circuit components are mounted. The former is an electronic component having a low height, and the latter is a tall component 62a having a large height. Therefore, the height of the first printed circuit board 61 can be reduced and the space efficiency is improved.

  Next, the remote controller will be described with reference to FIG. 5A. The fan control unit is provided with a weak operation switch S1, a middle operation switch S2, a strong operation switch S3, a wind direction switching switch S4, and a turn-off switch S5. When these switches S1 to S5 are pressed, an infrared signal is emitted from the light emitting unit PDR and received by the phototransistor 77 of the display unit 75, and the operation of the light emitting diode 76 composed of two-color LEDs is shown in FIG. As shown, the red light flashes for a moment and then lights up. The operator of the remote control device can recognize that the fan side has responded to the remote control operation by blinking for a moment, and can confirm that the operation has been performed in the forward rotation by lighting.

  Next, when the wind direction switch S4 is pressed, the light emitting diode 76 that is lit red is turned off, and then the green light is flashed for a moment and then turned on. This green lighting enables the operator of the remote control device to confirm that the direction of rotation has changed and that the vehicle is operating in reverse.

  The illumination control unit of the remote control device 4 is provided with an on / off switch L1, a dark switch L2, and a bright switch L3. The illuminator 66 can be turned on and off by pressing the switch L1, and the illuminance of the illuminator 66 can be darkened while the switch L2 is kept pressed, and the illuminance of the illuminator 66 can be controlled brightly while the switch L3 is kept pressed.

  Since the light receiving body for receiving the signal and the display body for indicating the operation status are provided at the lower part of the ceiling fan body 2 without an obstacle, the signal of the remote control device 4 can be surely received and the display can be easily seen. Remote control can be performed reliably and easily even from a distance.

  The ceiling fan of the present invention is small and light in weight and simple in outline, easy to install and operate, and is not only for home use but also for public facilities such as hospitals and business facilities such as inns. It can also be applied to other applications.

(A) Side view of Embodiment 1 of the present invention (b) External perspective view when the illuminator is installed Side sectional view showing the internal structure (A) Exploded perspective view of the main part (b) Plan view of the same part fractured Circuit configuration diagram (A) External view of the remote control device (b) Operation explanatory diagram of the remote control device (A) Side view of conventional ceiling fan (b) Same side cross-sectional view

Explanation of symbols

4 remote control device 20 joint metal fitting 30 motor shaft 40 DC motor 50 rotor blade 60 printed circuit board mounting frame 61 first printed circuit board (control unit)
61b Notch 62 Second printed circuit board (control unit)
62a Tall parts 62b Notch 63 Printed circuit board cover 64 Radiation fin 65 Transistor array (heat generation part)
65a Thyristor (Heat generation component)
66 Illuminator 72 Body Cover 72a Opening 75 Display Unit 76 Light Emitting Diode (Display)
77 Phototransistor (photoreceptor)

Claims (11)

An outer rotation type DC motor, a control unit for controlling the DC motor, a plurality of rotor blades attached to the outer rotation unit of the DC motor, and a joint bracket for hanging the ceiling connected to the motor shaft of the DC motor And a first and second printed circuit boards that constitute the control unit and are arranged on the periphery of the DC motor or the joint fitting. The ceiling fan according to claim 1, wherein outer edges of the first printed circuit board and the second printed circuit board have an arc shape and have substantially the same outer dimensions. 2. A ceiling fan according to claim 1, further comprising a printed circuit board mounting frame fixed to the joint metal fitting, wherein the first printed circuit board and the second printed circuit board are mounted on the printed circuit board mounting frame with their back surfaces facing each other. . The ceiling fan according to claim 3, wherein tall components having a large height are collected and mounted on a second printed circuit board that is mounted below the printed circuit board mounting frame. 4. The ceiling fan according to claim 3, wherein the first printed circuit board and the second printed circuit board are provided with a notch, and a heat radiating fin is housed in the notch, and a heat generating component that generates heat and becomes high temperature is attached to the heat radiating fin. The ceiling fan according to claim 5, wherein an illuminator is provided so as to be connectable to the motor shaft, and a thyristor for controlling a conduction phase of the illuminator is attached to the radiation fin. The ceiling fan according to claim 3, wherein the lid-like printed board cover and the pan-like body cover are directly attached to the printed board mounting frame so as to surround the first printed board and the second printed board. The ceiling fan according to claim 5 or 7, wherein an opening is provided at a lower portion of the main body cover surrounding the second printed circuit board, and air is allowed to flow in through a gap between the opening and the DC motor. 2. The ceiling fan according to claim 1, wherein a display unit is provided at a lower portion of the DC motor, and a display unit such as a light emitting diode indicating an operating state is provided on the display unit, and a light receiving unit such as a phototransistor for receiving a signal from the remote control device. . The ceiling fan according to claim 9, wherein the display body has different emission colors according to the rotation direction of the DC motor. 11. The ceiling fan according to claim 10, wherein the display body blinks when the light receiver receives a signal.

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