JP2015165127A - ceiling fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling fan which utilizes temperature rise of a body inner part to inhibit the deterioration of the illumination intensity of the lighting.SOLUTION: A ceiling fan comprises: a strut part 2 which may engage with a ceiling; a motor part 3 provided at a lower part of the strut part 2; a blade part 4 rotated by the motor part 3; a control part 5 provided at a lower part of the motor part 3; and a lighting part 6 provided at a lower part of the control part 5.On the surface of the motor part 3 a thermoelectric transducer 25 which generates electric power by a temperature difference between the motor part 3 and a peripheral part is provided. The control part 5 utilizes the electric power supply from the thermoelectric transducer 25 to supply the electric power to the lighting part 6. The structure allows the ceiling fan to obtain auxiliary power supply by utilizing heat generated by the motor part 3.

Description

  The present invention relates to a ceiling fan provided with illumination.

  Conventionally, this type of ceiling fan has a column part that can be engaged with the ceiling, a motor unit provided at the lower part of the column part, a blade part rotated by the motor part, and a control provided at the lower part of the motor part. And a lighting unit provided at a lower portion of the control unit, and a case unit that covers at least a part of the motor unit, the control unit, and the lighting unit (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2005-226587

  As in the conventional example, the problem with the ceiling fan with lighting, in which the lighting device, control circuit, and motor are integrated, is to drive the fan motor in addition to the heat generated by the lighting device itself when the lighting device is turned on. Due to the heat generated by the motor itself, the inside of the ceiling fan becomes a high temperature state, the luminous efficiency of the lighting device is lowered, and the brightness of the illumination is lowered.

  In particular, conventional fluorescent lamp lighting, which is easily affected by temperature, takes time from the start of lighting until the illuminance stabilizes.In addition, if the motor heat further overlaps, the illuminance further decreases, making it difficult to obtain a stable brightness. It was.

  In view of the above, the present invention aims to reduce the problems by utilizing the heat generated inside the equipment unique to the above-mentioned illuminated ceiling fan.

  In order to achieve this object, the ceiling fan of the present invention includes a support column that can be engaged with the ceiling, a motor unit provided at a lower part of the support column, a blade unit that is rotated by the motor unit, It consists of a control part provided at the lower part of the motor part and an illumination part provided at the lower part of this control part, and on the surface of the motor part, a power generation part for generating electric power by the temperature difference between the motor part and the surroundings is provided, The control unit is a ceiling fan that supplies electric power supplied from the power generation unit to the illumination unit, and thereby achieves an intended purpose.

  According to the ceiling fan of the present invention, the column part that can be engaged with the ceiling, the motor unit provided at the lower part of the column part, the blade part rotated by the motor part, and the control provided at the lower part of the motor part And an illuminating unit provided below the control unit, and a surface of the motor unit is provided with a power generation unit that generates electric power due to a temperature difference between the motor unit and the surroundings, and the control unit is connected to the power generation unit. By supplying the supplied power to the illumination unit, even if the illumination illuminance is reduced due to heat generated by the motor, the power of the power generation unit is used for illumination, so that the insufficient illuminance can be compensated. Can be obtained.

External front view of ceiling fan according to Embodiment 1 of the present invention Cross section of the ceiling fan Configuration diagram of thermoelectric conversion element of the ceiling fan The perspective view which shows the structure of the ceiling fan Plan view of the LED board part of the ceiling fan Lighting circuit diagram of the auxiliary lighting section of the ceiling fan The graph which shows the relationship between the electromotive force of the thermoelectric conversion element and temperature difference of the ceiling fan A graph showing the relationship between the electromotive force of the thermoelectric conversion element and the temperature difference of the ceiling fan Graph showing the relationship between LED illumination intensity and time of the ceiling fan

  According to a first aspect of the present invention, there is provided a ceiling fan according to a first aspect of the present invention, comprising: a strut portion that can be engaged with the ceiling; a motor portion provided at a lower portion of the strut portion; a blade portion that is rotated by the motor portion; A control unit provided, and an illumination unit provided below the control unit, and on the surface of the motor unit, a power generation unit that generates electric power due to a temperature difference between the motor unit and the surroundings is provided. By supplying the power supplied from the power generation unit to the illumination unit, even if the illumination illuminance decreases due to the heat generated by the motor, the power of the power generation unit can be used for illumination to compensate for the insufficient illuminance. The effect that can be obtained.

The illumination unit may include main illumination and auxiliary illumination.
Thus, the auxiliary illumination can be arbitrarily controlled by dividing the illumination circuit into the main illumination and the auxiliary illumination and using the power of the power generation unit for the auxiliary illumination. As described above, the user can arbitrarily control the auxiliary illumination to adjust the insufficient illuminance.

  Further, the illumination unit may include a detection unit that detects illuminance and feeds back to the control unit. Thus, by constantly monitoring the illuminance, the illuminance can be controlled when the illuminance falls below a certain illuminance.

  Moreover, it is good also as a structure provided with LED in the illumination part. Thereby, illumination with high illuminance can be realized with less electric power, and the power generation effect can be further enhanced.

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

(Embodiment 1)
As shown in FIG. 1, the ceiling fan 1 includes a support column 2, a motor unit 3, a blade unit 4, a control unit 5, an illumination unit 6, a case unit 7, and a pipe cover 9. .

  As shown in FIG. 2, the support | pillar part 2 is a hollow rod shape, has the suspension part 8 engageable with a ceiling in the upper part, and the motor part 3 is being fixed to the lower part. A cylindrical pipe cover 9 is provided around the support column 2.

  The motor unit 3 is an outer rotor motor and includes a stator core 10, a stator winding 11, a rotor 12, four thermoelectric conversion elements 25 serving as a power generation unit, and aluminum radiating fins 24. ing. As shown in FIG. 3, the thermoelectric conversion element 25 is surface-connected to the surface of the stator core 10 by a heat absorption surface 27, and heat radiation fins 24 are attached to the heat radiation surface 26. The thermoelectric conversion element 25 is a power generation element using the Seebeck effect, and generates an electromotive force when a temperature difference is applied between the heat dissipation surface 26 and the heat absorption surface 27, and generates a voltage between the plus lead 28 and the minus lead 29. It is.

  The blade portion 4 has a substantially long rectangular flat plate shape, and one short side of the substantially long rectangular flat plate shape is detachably provided on the support portion 23. The support portion 23 is fixed to the periphery of the motor portion 3, that is, the rotor 12, and is provided in the motor portion 3 so as to be rotatable together with the rotor 12.

As shown in FIG. 4, the control unit 5 is provided at the lower portion of the motor unit 3, and includes a control case unit 13 and a control board unit 14 provided in the control case unit 13. The PCB holder 50 fixes the control board part 14 and allows the control case part 13 to be mounted. The control case part 13 has a substantially bowl shape with an upper part opened, and has a protrusion part 13a protruding downward from the lower surface on the lower surface. The control board part 14 is electrically connected to the motor 36, the LED board part 17, the four thermoelectric conversion elements 25, and the power supply wire 22 extending from the ceiling. As shown in FIG. 6, the control board unit 14 includes a power supply circuit unit 35 that supplies power to the motor 36 and the main illumination unit 39 of the LED board unit 17, a microcomputer 37 that controls the power supply circuit unit 35, and thermoelectric conversion The auxiliary illumination control circuit 38 converts the electromotive force obtained by the element 25 into a power source for the auxiliary illumination unit 40.

  As shown in FIG. 4, the illumination unit 6 includes an illumination lower cover 15, an illumination upper cover 16, and an LED substrate unit 17. The illumination unit 6 is provided below the control unit 5 and illuminates light downward from the lower surface. It is. The case part 7 has a bowl shape in which an upper surface covering at least a part of the motor part 3, the control part 5, and the illumination part 6 is opened, and has an opening in the lower part, from which a part of the illumination part 6 is formed. Exposed. Light is emitted from this exposed portion. The lower illumination cover 15 has a circular cylindrical shape with the lower part closed, and is sandwiched between the control unit 5 and the case unit 7. A slit-shaped opening 15a is provided on the side surface. The illumination lower cover 15 is made of a resin material having optical transparency, and is, for example, polycarbonate containing a diffusing material. The illumination upper cover 16 is accommodated in the illumination lower cover 15. The illumination upper cover 16 has a circular cylindrical shape with the upper part closed, and is sandwiched between the illumination lower cover 15 and the control unit 5. The upper surface of the illumination upper cover 16 hits a protrusion 13 a that protrudes downward from the lower surface of the control case 13 of the controller 5. Thereby, a space part is provided between the illumination upper cover 16 and the control part 5. The lighting upper cover 16 is made of metal, for example, aluminum, which is integrally formed. The LED board portion 17 is attached to the illumination upper cover 16.

  As shown in FIG. 5, the LED substrate unit 17 includes a main illumination unit 39 including a plurality of light emitting elements 18 and one receiving unit 19, auxiliary light emitting elements 30, 31, 32, 33 and one illuminance sensor 34. It is comprised with the auxiliary | assistant illumination part 40 comprised by these. One example of a light emitting element used for main illumination or auxiliary illumination is a rectangular plate-shaped LED chip. A plurality of the LED chips are radially arranged around the receiving unit 19. The receiving unit 19 is provided in the center of the LED substrate unit 17 with a predetermined distance downward from the LED substrate unit 17 and can receive a signal transmitted from the remote controller 60 via the lower illumination cover 15. . One example of this signal is due to infrared. The illuminance sensor 34 of the auxiliary illumination unit 40 detects the brightness around the sensor and feeds back the detection result to the control board unit 14.

  Next, the operation of the ceiling fan 1 will be described. The signal transmitted from the remote controller 60 is received by the receiving unit 19 provided at the center of the LED board unit 17, and the blade unit 4 of the main body rotates to send wind by driving the motor unit 3 of the ceiling fan. In addition, when an illumination button on the remote controller 60 is pressed, an illumination signal is received and the illumination is turned on or off.

  The feature of the ceiling fan in the first embodiment is that the heat absorption surface 27 of the thermoelectric conversion element 25 is in close contact with the stator core 10 to absorb the heat of the stator core 10 while the heat dissipation surface 26 is in close contact with the heat dissipation fins 24. In other words, the heat is radiated to cause a temperature difference in the thermoelectric conversion element 25 to obtain power for the auxiliary light emitting elements 30, 31, 32, and 33. Since the stator core 10 generates a magnetic field by energizing the motor coil and at the same time generates heat due to eddy current loss, the thermoelectric conversion element 25 can obtain an electromotive force by absorbing them. In the ceiling fan 1 of the first embodiment, the motor 36 has an output of 50 watts, and the surface temperature of the stator core 10 at that time is 90 ° C. at the maximum. On the other hand, since the radiating fins 24 are exposed to the outside of the body of the ceiling fan, the air is continuously cooled by the air flow generated while the fan is rotating, and the temperature difference from the stator core 10 can be greatly increased. Can give birth. Here, assuming that the temperature in the atmosphere is constant at 25 ° C., the surface of the radiating fin 24 is stabilized at about 30 ° C., and the temperature of the radiating surface 26 of the thermoelectric conversion element 25 is stabilized at about 35 ° C. The maximum temperature difference between 10 is about 55 ° C. In the ceiling fan 1 of the first embodiment, as shown in FIG. 8, the electromotive force of each thermoelectric conversion element 25 is about 30 mW at a temperature difference of 55 ° C., and the electromotive force of 120 mW is obtained in total of the four pieces. Will be.

  Next, the electromotive force obtained by the thermoelectric conversion element 25 is supplied to the auxiliary illumination control circuit 38 as shown in FIG. The auxiliary lighting control circuit 38 is a so-called DC / DC converter, boosts the obtained electromotive force, generates power supply voltages for the auxiliary light emitting elements 30, 31, 32, and 33, and supplies them to the auxiliary lighting unit 40. Here, the power supply control IC 56 is controlled by the microcomputer 37, whereby the power supply to the auxiliary illumination unit 40 is turned on / off. In the microcomputer 37, the brightness around the main lighting unit 39 is constantly monitored by the illuminance sensor 34 mounted on the auxiliary lighting unit 40, and when the illuminance of the main lighting unit 39 falls below the target illuminance, the auxiliary lighting unit 40 is moved to. Operates to supply power. Here, it is assumed that when the light emitting element 18 of the main illumination unit 39 is turned on, the power supply to the auxiliary illumination unit 40 is started when the illuminance on the LED substrate unit 17 falls below 9000 lx. In addition, since the auxiliary light emitting elements 30, 31, 32, and 33 on the auxiliary illumination unit 40 are limited in current by the constant current diodes 47 to 50, a constant light emission luminance is ensured when power is supplied.

  The luminous efficiency of the light-emitting element 18 serving as an illumination light source decreases due to the influence of self-heating as time elapses from the start of lighting. That is, the illuminance of the entire main illumination unit 39 is reduced. FIG. 9 shows a graph in which the illuminance at 1.5 m immediately below the illumination unit 6 is recorded with time. As shown in FIG. 9, when the auxiliary illumination unit 40 is not turned on, an illuminance decrease of about 40 lx occurs after one hour compared to the initial illuminance, and further decreases with time and stabilizes at about 250 lx. On the other hand, when the auxiliary illumination unit 40 is turned on, when the illuminance sensor 34 detects that the illuminance on the LED substrate unit 17 is 9000 lx or less, that is, 260 lx or less at an illuminance immediately below 1.5 m, the auxiliary light emitting element 30, 31, 32 and 33 are turned on. By doing so, the illuminance immediately below 1.5 m can be maintained at 260 lx, and the decrease in illuminance of the main illumination unit 39 can be compensated.

  As shown in the above configuration, in the ceiling fan of the first embodiment, the heat generated by the stator core 10 of the motor 36 is converted into electromotive force by the thermoelectric conversion element 25, and the auxiliary light emitting elements 30, 31, 32, It is possible to create 33 power sources. As a result, it is possible to obtain an illumination power source without wasting power from the commercial power source and maintaining the size of the ceiling fan body compact.

  Further, like the main illumination unit 39 and the auxiliary illumination unit 40, the auxiliary light emitting elements 30, 31, 32, and 33 can be separately controlled and independently controlled so that the auxiliary light emitting elements can be used in the intended situation and timing. The illumination part 6 which can light up 30, 31, 32, 33 can be obtained.

  In addition, by providing an illuminance sensor 34 on the LED substrate unit 17 and monitoring the illuminance of the main illumination unit 39, the microcomputer 37 can determine the situation and timing of lighting the auxiliary light emitting elements 30, 31, 32, 33. It becomes.

  Moreover, it becomes possible to obtain the auxiliary illumination part 40 which can light an illumination with the small electromotive force of the thermoelectric conversion element 25 by energy saving by using LED with high luminous efficiency by illumination as the light emitting element used for illumination.

  As described above, the present invention includes a support column that can be engaged with the ceiling, a motor unit that is provided at the lower part of the support unit, a blade unit that is rotated by the motor unit, and a control unit that is provided at the lower part of the motor unit. And an illuminating unit provided at a lower portion of the control unit, and a power generation unit that generates electric power due to a temperature difference between the motor unit and the surroundings is provided on the surface of the motor unit, and the control unit is configured to generate the power generation unit. It supplies to the said illumination part using the electric power supplied from 1. It is characterized by the above-mentioned.

  In other words, an auxiliary power supply for illumination is provided in the heat generating part of the motor, and the increase in internal heat generation, which has been a conventional problem of a ceiling fan with illumination, can be used in reverse, and the illuminance reduction of the illumination part can be suppressed Is. Therefore, it is expected to play an active role as a small ceiling fan with lighting suitable for home use and office use.

DESCRIPTION OF SYMBOLS 1 Ceiling fan 2 Support | pillar part 3 Motor part 4 Blade | wing part 5 Control part 6 Illumination part 7 Case part 9 Pipe cover 10 Stator iron core 11 Stator winding 12 Rotor 13 Control case part 13a Protrusion part 14 Control board part 15 Under illumination Cover 16 Illumination upper cover 17 LED substrate 18 Light emitting element 22 Power supply wire 23 Support part 25 Thermoelectric conversion element 30, 31, 32, 33 Auxiliary light emitting element 34 Illuminance sensor 40 Auxiliary illumination

Claims (4)

A strut part that can be engaged with the ceiling, a motor part provided at the lower part of the strut part, a blade part rotated by the motor part, a control part provided at the lower part of the motor part, and a lower part of the control part The illumination unit is provided, and on the surface of the motor unit, a power generation unit that generates electric power due to a temperature difference between the motor unit and the surroundings is provided, and the control unit utilizes the electric power supplied from the power generation unit. A ceiling fan that is supplied to the lighting section. The ceiling fan according to claim 1, wherein the illumination unit includes main illumination and auxiliary illumination. The ceiling fan according to claim 1, wherein the illumination unit includes detection means for detecting illuminance and feeding back to the control unit. The ceiling fan according to claim 1, wherein the illumination unit includes an LED.

Images