JP2014152627A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which enables a blower to be disposed in a compact manner and includes the blower capable of eliminating unevenness in temperature distribution at an air conditioning object space.SOLUTION: In a lighting device 1, a blade 6 of a propeller fan 60 is disposed at a space 8c formed at a center part of a lighting section 8 and is arranged between a position where a position of a lower end of the blade 6 substantially corresponds to a position of an upper end 8a of the lighting section 8 and a position where the position of the lower end of the blade 6 substantially corresponds to a lower end 8e of the lighting section 8 in a direction along a vertical direction. An opening portion 13 which introduces air into the space 8c from an area above the blade 6 and an opening 14 which is positioned below the space 8c so as to continue into the space 8c are formed in the lighting device 1. In the lighting device 1, a diameter of the opening 14 and a diameter of the blade 6 are set and the propeller fan 60 rotates so that air having the total airflow rate of 8 m/min or higher may be blown from the opening 14.

Description

  The present invention generally relates to a lighting fixture, and more particularly to a lighting fixture including a blower that generates an airflow that moves in a space such as a room.

  It is generally known that unevenness in temperature distribution occurs in the room by the operation of an air conditioner that harmonizes air in a room or the like. That is, when the air conditioner performs a cooling operation, cold air easily collects near the floor surface, and cold air hardly accumulates near the ceiling. On the other hand, when the air conditioner performs a heating operation, warm air hardly accumulates near the floor surface, and warm air tends to accumulate near the ceiling.

  In order to prevent the occurrence of such temperature distribution, the use of a fan or a circulator together with an air conditioner has become widespread. However, in many cases where a fan or circulator is used, the fan or circulator is placed in the corner of the room. For this reason, it is difficult to generate an airflow that circulates between the ceiling and the floor surface in the entire room by using a fan or a circulator.

  On the other hand, it is possible to install a general ceiling fan having a diameter exceeding 100 cm on the ceiling and generate an air flow circulating in the whole room by operating the ceiling fan. However, depending on the size of the room in which the ceiling fan is installed, such as when the height of the ceiling in the room is relatively low, the ceiling fan can be an obstacle for residents. On the other hand, lighting fixtures equipped with a blower that generates an air flow in a space such as a room have been proposed.

  As a lighting fixture provided with a blower, for example, it was described in a circulation blower described in Japanese Patent No. 399575 (hereinafter referred to as Patent Document 1) and JP 2010-243028 (hereinafter referred to as Patent Document 2). A circulator with illumination and an air-conditioning lighting apparatus described in Japanese Patent Application Laid-Open No. 2012-69340 (hereinafter referred to as Patent Document 3) are known.

  In the circulation blower described in Patent Literature 1, a centrifugal fan as a blower is disposed above the illuminator body. Thus, the centrifugal fan as a blower that generates an air flow in a space such as a room is arranged compactly with respect to the illuminator body in a substantially horizontal direction. By the rotation of the centrifugal fan, the air in the center of the room is sucked into the suction port. The suction port is located above the illuminator body and on the outer periphery of the centrifugal fan. Air is sucked into the periphery of the centrifugal fan from the suction port along a substantially horizontal direction.

  The sucked air is blown out from an outlet located at a position different from the inlet of the outer periphery of the centrifugal fan. The air is blown out slightly from the periphery of the centrifugal fan to the outside of the air outlet, slightly obliquely below the horizontal direction.

  In the illuminated circulator described in Patent Document 2, a plurality of cross-low fans are arranged adjacent to the illumination unit. As described above, in the circulator with illumination described in Patent Document 2, an airflow circulating through the entire room can be generated by the operation of the plurality of crossflow fans.

  The air-conditioning lighting fixture described in Patent Document 3 includes a fan and a lighting fixture provided in a flow path of air that moves by rotation of the fan. In the air-conditioning lighting fixture described in Patent Document 3, a fan is disposed at the center of the lighting fixture. Thus, a fan as a blower that generates an air flow in a space such as a room is compactly arranged in the lighting fixture. In the air-conditioning lighting fixture described in Patent Document 3, the lighting fixture arranged on the outer periphery of the fan as an air flow path that moves by the rotation of the fan can be cooled by the rotation of the fan. Thereby, the thermal deterioration of a lighting fixture is reduced.

Japanese Patent No. 39915575 JP 2010-243028 A JP 2012-69340 A

  In the circulation blower described in Patent Document 1, air sucked into the periphery of the centrifugal fan along the substantially horizontal direction is blown out in the substantially horizontal direction from the periphery of the centrifugal fan. For this reason, since the airflow generated by the centrifugal fan has almost no vertical component, it does not reciprocate sufficiently to circulate between the indoor ceiling and floor. That is, it is considered that the air cannot be effectively moved in the room by the airflow generated by the normal operation of the centrifugal fan.

  Moreover, in the circulation fan described in Patent Document 1, the centrifugal fan is disposed above the illuminator body. Therefore, the centrifugal fan is not arranged compactly with respect to the illuminator body in the substantially vertical direction so that the centrifugal fan protrudes from the illuminator body along the substantially vertical direction. Thereby, there exists a possibility of making a resident in a room memorize a feeling of pressure.

  In the circulator with illumination described in Patent Document 2, it is necessary to install a plurality of cross flow fans adjacent to the illumination unit in order to generate an air flow circulating in the whole room. In the circulator with illumination described in Patent Document 2, since the plurality of crossflow fans are arranged outside the illumination unit, the crossflow fans are not compactly arranged in the illumination unit.

  The fan in the air-conditioning lighting fixture described in Patent Document 3 is arranged at the center of the lighting fixture for the purpose of cooling the lighting fixture, and is not for generating an airflow circulating in a space such as a room. Absent. That is, the air-conditioning lighting fixture described in Patent Document 3 is not designed so that the airflow generated by the operation of the fan circulates in the room. In the air-conditioning lighting fixture described in Patent Document 3, a lighting fixture is arranged in a passage of air sucked by a fan. The airflow generated by the operation of the fan only circulates between the fan and the lighting device.

  When the air cannot be effectively moved in a room subject to air conditioning, like the circulation blower described in Patent Document 1 or the air-conditioning lighting apparatus described in Patent Document 3, the air in the room is conditioned. Sometimes, the temperature distribution in the room may be uneven.

  Then, the objective of this invention is providing the lighting fixture provided with the air blower which can eliminate the nonuniformity of the temperature distribution in the space of air conditioning object while being able to arrange | position a blower compactly.

  The lighting fixture according to the present invention includes a blower and an illumination unit. The blower has a rotation axis that includes blades and extends in a substantially vertical direction. The illumination unit includes a light emitter. The blades are arranged in a space formed in the center of the illumination unit, and in the direction along the vertical direction, the position of the lower end of the blades substantially coincides with the position of the upper end of the illumination unit, and the lower end of the illumination unit. It arrange | positions between the position where the position of the lower end of a blade | wing substantially corresponds to a position.

The lighting fixture is formed with a suction port that introduces air into the space from above the blades, and a blowout port that is positioned below the space so as to be continuous with the space and leads air out of the space. Yes. In the lighting fixture according to the present invention, the diameter of the air outlet and the diameter of the blades are set so that air having a total air volume of 8 m ³ / min or more is blown out from the air outlet, and the blower rotates.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to arrange | position a blower compactly, the lighting fixture provided with the blower which can eliminate the nonuniformity of the temperature distribution in the space of air conditioning object can be provided.

It is a longitudinal cross-sectional view which shows roughly an example of the lighting fixture according to this invention. It is a control block diagram which shows the control relation of an example of the lighting fixture according to this invention. It is a partial cross section figure of the lighting fixture according to this invention, Comprising: It is a figure which shows roughly the airflow which circulates through space, such as a room | chamber interior. It is a figure which shows roughly an example of arrangement | positioning of the light emitting diode attached to the illumination part of the lighting fixture according to this invention, Comprising: It is a reduced sectional view of the IV-IV line | wire shown in FIG. It is a figure which shows schematically another example of arrangement | positioning of the light emitting diode attached to the illumination part of the lighting fixture according to this invention, Comprising: It is a reduced sectional view of the IV-IV line | wire shown in FIG. It is a longitudinal cross-sectional view which shows schematically the lighting fixture according to this invention, Comprising: It is a figure for demonstrating the preferable position of the blade | wing of a propeller fan in the space formed in the center part of an illumination part. It is a longitudinal cross-sectional view which shows schematically another example of the lighting fixture according to this invention. It is a control block diagram which shows the control relation of another example of the lighting fixture according to this invention. It is a flowchart of an example of the control performed in another example of the lighting fixture according to this invention. FIG. 6 schematically shows a relationship between a temperature detected by the lighting fixture as a room temperature changed by an example of control executed in another example of the lighting fixture according to the present invention and a sequence of an example of control executed. FIG. FIG. It is a flowchart of another example of the control performed in another example of the lighting fixture according to this invention. The figure which shows typically the relationship between the temperature of the indoor ceiling vicinity which changes with another example of the control performed in another example of the lighting fixture according to this invention, and the sequence of another example of the control performed. It is. It is a schematic diagram which shows the measurement point of the wind speed in a room where the experimental example 1 of an Example is performed, and the measurement point of a temperature difference, Comprising: It is the figure which looked at the said room along the substantially horizontal direction. It is a schematic diagram which shows the measurement point of the wind speed in a room where the experimental example 1 of an Example is performed, and the measurement point of a temperature difference, Comprising: It is the figure which looked at the said room toward the floor from the ceiling. It is the data obtained in Experimental example 1 of an Example, Comprising: It is a graph which shows the change of the temperature distribution in the said room according to the total air volume of the airflow which generate | occur | produces from an air blower. It is the data obtained in Experimental example 2 of an Example, Comprising: It is a graph which shows the change of the noise value according to the value of the wind speed and the total air volume of the airflow which a fan produces | generates. It is the data obtained in Experimental example 3 of an Example, Comprising: The relationship between the value of the sensible temperature with respect to the wind speed of the airflow which a fan produces | generates, and the setting temperature in an air conditioner, and the wind speed of the airflow which a fan produces | generates are shown. It is a graph. It is the data obtained in Experimental example 4 of an Example, Comprising: It is a graph which shows the relationship between the diameter of the blade | wing with respect to the diameter of a blower outlet, and the temperature of the lighting fixture which changes when operating a fan. It is the data obtained in Experimental Example 5, and shows the relationship between the rotation speed of the motor and the total air volume of the airflow generated from the blower, and the relationship between the rotation speed of the motor and the saturation value of the temperature difference in the room. It is a graph. It is the data obtained in Experimental example 5, Comprising: It is a graph which shows the relationship between the rotation speed of the motor corresponding to the diameter of a blower outlet, and the saturation value of the temperature difference in a room | chamber interior. It is another data obtained in Experimental Example 5, and is a graph showing a change in noise value according to the number of rotations of the motor corresponding to the diameter of the outlet.

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

(First embodiment)
In FIG. 1, the lighting fixture 1 which is an example of the lighting fixture according to this invention is shown. As illustrated in FIG. 1, the lighting fixture 1 includes a propeller fan 60 as an example of a blower and an illumination unit 8. The lighting fixture 1 is installed on the ceiling via a rosette 20 provided on the ceiling of the room. The lighting fixture 1 includes a housing 12. The housing 12 includes a top wall 12a extending in a substantially horizontal direction, a partition wall 12b extending in a substantially horizontal direction below the top wall 12a, and a plurality of rod-like or wall-like shapes for hanging the illumination unit 8 below the partition wall 12b. And a hanging portion 11. In the housing 12, a peripheral wall 12e having a substantially cylindrical shape is formed between the top wall 12a and the partition wall 12b. The adapter 2 connected to the rosette 20 is fixed to the top wall 12 a of the housing 12.

  In the housing 12, a space 12d surrounded by the peripheral wall 12e, the top wall 12a, and the partition wall 12b accommodates electrical components, a control board, and the like (not shown). Wiring and the like extending between the electrical component and the adapter 2 are also arranged in the space 12d. A space 12c is formed below the partition wall 12b so as to be sandwiched between the partition wall 12b and the hanging portion 11. The propeller fan 60 is disposed in the space 12c. The space 12c continues to the space around the illuminating unit 8 via the periphery of the hanging part 11 (in other words, the opening part excluding the part occupied by the hanging part 11 below the partition wall 12b).

  The propeller fan 60 is accommodated in the housing 12. The number of propeller fans 60 is one. The propeller fan 60 and the housing 12 are not integrated, and the propeller fan 60 is fixed to the housing 12 and the illumination unit 8 by attaching the propeller fan 60 to the housing 12. The propeller fan 60 includes a motor 5 as a driving unit, a blade 6, and a spinner 7. The spinner 7 fixes the shaft 5 a and the blade 6 of the motor 5. By connecting the motor 5 including the shaft 5a to the connection portion 4 fixed to the partition wall 12b, the propeller fan 60 is disposed in the space 12c. The connecting portion 4 as a cover of the motor 5 is fixed to the partition wall 12b with screws or the like. The direction in which the rotation axis of propeller fan 60 extends substantially coincides with the direction in which shaft 5a extends.

  The motor 5 and the shaft 5a are configured to be capable of forward rotation and reverse rotation. In FIG. 1, the internal configurations of the adapter 2, the connection unit 4, and the propeller fan 60 are omitted.

  The illumination part 8 and the hanging part 11 are fixed by fastening screws or the like. The illumination unit 8 includes a light emitting diode as a light source to be described later. The illumination unit 8 includes a substrate, a reflection sheet, and a cover member that diffuses light, not shown. A light emitting diode is attached to the substrate.

  The illumination unit 8 has a substantially annular shape. The illuminating unit 8 has an upper surface 8b and a lower surface 8f. The upper end 8a of the illumination unit 8 is located on the upper surface 8b, and the lower end 8e of the illumination unit 8 is located on the lower surface 8f. A space 8 c is formed at the center of the illumination unit 8. Below the partition wall 12b, the space 8c is included in the space 12c. The blade 6 and the spinner 7 of the propeller fan 60 are disposed in the space 8c. Thus, at least a part of the propeller fan 60 is disposed in the space 8c.

  A gap between two adjacent hanging portions 11, that is, an opening portion 13 excluding a portion occupied by the hanging portion 11 below the partition wall 12 b is an inlet for introducing air into the space 12 c from above the propeller fan 60. Or the opening part 13 except the part which the suspension part 11 occupies below the partition 12b is a blower outlet which guide | induces air from the space 12c above the propeller fan 60. FIG. When the motor 5 rotates forward, the opening portion 13 functions as an upper suction port. On the other hand, when the motor 5 rotates in the reverse direction, the opening portion 13 functions as an upper outlet.

  The protrusion 19 of the illumination unit 8 has a substantially cylindrical shape. The opening 14 having the protrusion 19 as an edge faces vertically downward. The opening 14 is continuous with the space 8c and located below the space 8c. The opening 14 is a blowout port that guides air out of the space 12c. Alternatively, the opening 14 is a suction port that introduces air into the space 12c. When the motor 5 rotates forward, the opening 14 functions as an outlet. On the other hand, when the motor 5 rotates in the reverse direction, the opening 14 functions as a suction port. The protrusion 19 is configured such that a fan cover (not shown) can be attached to the protrusion 19.

  Thus, the protrusion 19 forms the opening 14 as a blowout port or a suction port. Further, the space sandwiched between the upper surface 8b of the illumination unit 8 and the housing 12 forms an upper suction portion or an upper blowing portion. The airflow sent by the propeller fan 60 when the motor 5 rotates forward passes through the opening 14 and flows downward from the space 12 c along the lower surface 8 f of the illumination unit 8. The airflow reflected on the floor of the room moves upward toward the ceiling. The airflow that has reached the vicinity of the ceiling flows into the space 12 c along the upper surface 8 b of the illumination unit 8.

  When the motor 5 rotates in the reverse direction, the air flow sent out by the propeller fan 60 flows out obliquely upward from the space 12c so as to flow along the partition wall 12b and the upper surface 8b of the illumination unit 8. The airflow flowing out of the space 12c is reflected on the ceiling after moving toward the ceiling. The airflow that moves downward by being reflected by the ceiling moves upward toward the ceiling after being reflected by the floor surface. Furthermore, when the airflow reaches the vicinity of the lower end 8e of the illumination unit 8, the airflow flows into the space 12c from the opening 14 along the lower surface 8f of the illumination unit 8.

In order to generate an air flow having a flow rate sufficient to circulate in the room, the diameter d _{1 of the} blade 6 is set so that the relationship of d ₁ ≧ 0.8d ₀ is established with respect to the diameter d _{0 of the} opening 14. The By configuring the propeller fan 60 in this way, the propeller fan 60 can generate an air flow having a flow rate sufficient to circulate in the room, and at the same time, can effectively cool the illumination unit 8. That is, the diameter d ₁ of the propeller fan 60 is optimally set for the purpose of cooling the illumination unit 8. In addition, regarding the diameter d ₀ of the opening 14 serving as the air outlet, the diameter of the inner surface 18 of the illuminating unit 8 may be regarded as the diameter d _{0 of the} opening 14 by ignoring the dimension of the projection 19 serving as the edge. .

  FIG. 2 is a control block diagram showing control related to the lighting fixture 1. The luminaire 1 includes a control unit 3 including a microcomputer and an input / output circuit. When the remote controller 31 is operated by the user, a signal is output from the remote controller 31. The light receiving unit 32 inputs this signal. The light receiving unit 32 is provided, for example, on the bottom surface of the lighting fixture 1 (see FIG. 1). The place where the light receiving unit 32 is provided in the lighting fixture 1 may be, for example, the lower part of the lighting unit 8 (see FIG. 1) or the spinner 7 (see FIG. 1).

  Based on information included in the signal input by the light receiving unit 32, the control unit 3 controls the motor 5 and the illumination unit 8. Under the control of the control unit 3, the lighting unit 8 switches between turning on and off the light source, which will be described later, and adjusting the luminance or color tone of the light source. Further, the number of rotations of the motor 5 including the drive of the motor 5 and the stop of the drive is adjusted by the control of the control unit 3.

The controller 3 controls the rotation speed of the motor 5 so that the total air volume blown from the opening 14 is 8 m ³ / min or more. This air volume is a value obtained at a height of 120 cm from the floor. The wind speed is a value obtained at a height of 120 cm from the floor and at a position 5 cm away from the position vertically below the center of the luminaire 1 in the horizontal direction. The position 120 cm above the floor is a position that assumes the sitting height of an adult male. According to the total air volume of such a size, the indoor air is sufficiently agitated, so that the uneven temperature distribution in the room can be improved.

  The necessary total air volume and wind speed can be obtained by optimally controlling the rotational speed of the propeller fan 60 according to the specifications of the propeller fan 60 such as the diameter, thickness, and number of blades 6. .

From the viewpoint of noise suppression, the upper limit of the total air volume is preferably set to 67 m ³ / min or less.

More preferably, the total air volume blown from the opening 14 is preferably set to 8 m ³ / min or more and 32 m ³ / min or less. According to such a total air volume, noise in the room can be reduced, and a person in the room can feel the feeling of being hit by the wind, but can realize a decrease in the sensible temperature. Therefore, indoor comfort can be improved.

Furthermore, in the lighting fixture 1, when the total air volume obtained by the rotation of the propeller fan 60 is Q (m ³ / min) and the rotation speed of the motor 5 is N (rpm), the total air volume Q and the rotation speed The relationship with N is preferably such that Q ≦ 0.094N−15.8. By controlling the motor 5 so that Q ≦ 0.094N-15.8 holds, in many cases, the temperature difference in the room between about 0.1 m and 1.8 m on the floor is within 3 ° C. Can be suppressed. The total air volume Q is a value obtained at a height of 120 cm from the floor.

More preferably, regarding the relationship between the rotational speed N of the motor 5 and the diameter d _{0 of the} opening 14 when the diameter of the opening (blower) 14 is d ₀ (mm), 0.74 d ₀ ≦ N ≦ 2. it is preferable that the 19d ₀ is established. In the case where this relational expression holds, when N ≧ 0.74d ₀ , the temperature difference between about 0.1 m and 1.8 m above the floor can be suppressed to within 3 ° C. with certainty. Further, when the control unit 3 controls the motor 5 so that N ≦ 2.19d ₀ is established, noise due to the rotation of the propeller fan 60 is generated at a point about 1.0 m away from the lighting fixture 1 vertically downward. It is possible to obtain the rotation speed N before the sudden increase. By controlling the rotation speed N of the motor 5 in this way, it is possible to reduce the noise of the propeller fan 60 while eliminating the uneven temperature distribution in the room.

  FIG. 3 is a partial cross-sectional view of the luminaire 1 and schematically shows an air flow circulating in a space such as a room. When the blade 6 rotates in the forward direction as the motor 5 rotates in the propeller fan 60, air is sucked into the space 12c from the vicinity of the ceiling (C1) and the air flows downward from the space 12c as shown by the arrows in FIG. Flows out (C2). When the blade 6 rotates in reverse with the reverse rotation of the motor 5 in the propeller fan 60, the air sent out by the propeller fan 60 moves in the direction opposite to the arrows C1 and C2 illustrated.

  The upper surface 8 b of the illumination unit 8 faces the ceiling of the room in the illumination unit 8. The upper surface 8b has a curved surface shape that curves toward the ceiling. More specifically, the upper surface 8b has a curved shape protruding toward the ceiling and the space 8c and a curved shape protruding toward the opposite side of the ceiling and the space 8c. In the longitudinal section of the illuminating unit 8, the upper surface 8b has a smooth curved shape that continues from the upper end 8a of the illuminating unit 8 along the vertical direction to the middle part.

  The lower surface 8f forming the bottom surface of the illumination unit 8 has a shape inclined from the horizontal direction and the vertical direction. When the luminaire 1 is installed on the ceiling, the lower surface 8 f faces the indoor floor in the illumination unit 8. The lower surface 8f as a part below the part connected to the connection part 9 among the illumination parts 8 has a curved surface shape so as to protrude toward the center of the illumination part 8 and the floor. More specifically, the lower surface 8f has a curved shape protruding toward the floor and the space 8c and a curved shape protruding toward the opposite side of the floor and the space 8c. In the longitudinal section of the illuminating unit 8, the lower surface 8f has a smooth curved shape that continues from the lower end 8e of the illuminating unit 8 to the middle portion along the vertical direction. Thus, the lower surface 8f has an inclined portion inclined from the horizontal direction so as to extend obliquely downward in the vertical direction. In addition, the part which contacts the suspension part 11 in the illumination part 8 is extended in the substantially perpendicular direction.

  For example, when the upper suction portion is formed so that the flow path through which the air flows before it flows into the space 12c from the periphery of the illumination portion 8 is bent at a substantially right angle, the traveling direction is suddenly changed in this way. A portion where the flow stays at the edge of the bent portion is formed. For this reason, the air blowing performance is reduced by reducing the area of the air flow path.

  On the other hand, the upper surface 8b is formed such that the upper surface 8b is smoothly curved so that the area of the flow channel formed between the ceiling and the upper surface 8b gradually increases as in the illumination unit 8. Air flows smoothly along 8b. In addition, the pressure of the air flowing along the upper surface 8b of the illumination unit 8 toward the space 12c has a tendency to gradually decrease as the area of the flow path formed between the ceiling and the upper surface 8b gradually increases. . Further, the rotation of the blade 6 of the propeller fan 60 generates a negative pressure around the blade 6. Therefore, due to the pressure difference between the illumination unit 8 and the propeller fan 60, the air flowing along the upper surface 8b of the illumination unit 8 easily flows through the space 12c to the periphery of the blades 6 of the propeller fan 60. Thus, according to the shape of the upper surface 8b of the illumination part 8, ventilation performance can be improved.

  On the other hand, since the air flow blown out from the opening 14 can smoothly flow obliquely downward along the outer periphery of the lower surface 8f, the flow can be separated at any position on the lower surface 8f of the illumination unit 8. Therefore, static electricity generated between the lower surface 8f of the illuminating unit 8 and the blown airflow can be minimized. Thereby, it can suppress that the charged dust adheres to the lower surface 8f of the illumination part 8 (namely, smudging). By suppressing smudging, the lower surface 8f of the illuminating unit 8 can be kept clear, so that a decrease in illuminance can be prevented.

  Further, since the lower surface 8f has a curved shape, the light emitted from the light emitting diode inside the illumination unit 8 is diffused in a wider range, so that the illuminance of the light by the illumination unit 8 can be improved. Furthermore, since the airflow is blown obliquely downward, the airflow can be sufficiently distributed in the room.

  A certain distance is provided between the upper end 8a of the illumination unit 8 and the ceiling. The fixed distance is, for example, a distance that is larger than the distance between the ceiling (upper end surface) of the general ceiling light and the ceiling, and the sound of the propeller fan 60 is not a noise for a person in an indoor space. The range up to.

  In addition, the upper end of the lighting fixture 1 corresponds to the position of the upper end surface of the top wall 12a (refer FIG. 1). The position of the upper end surface of the top wall 12a substantially matches the bottom surface 20a (see FIG. 1) of the rosette 20 when the lighting fixture 1 is installed on the ceiling. When the protruding height of the rosette 20 is very close to zero (zero), the height between the upper end 8a of the illumination unit 8 and the upper end surface of the top wall 12a is the distance from the upper end 8a of the illumination unit 8 to the ceiling. Is approximately the same.

  FIG. 4 is a diagram schematically showing an example of the arrangement of the plurality of light emitting diodes 81 attached to the illuminating unit 8, and is a reduced sectional view taken along the line IV-IV shown in FIG. In the illumination unit 8, the light emitting diodes 81 are arranged according to the Fibonacci sequence. The Fibonacci sequence is arranged by rotating the points in a spiral manner every golden angle θ = 137.5 °, and is often seen in nature as represented by an array of sunflower seeds. In FIG. 4, the illustration of the blades 6 (see FIG. 1) disposed in the space 8c is omitted.

  As shown in FIG. 1, in the lighting fixture 1, since the space 8c is formed in the center part, there exists a possibility that illumination intensity may fall compared with the other lighting fixtures of the same diameter in which space is not formed in a center part. However, by arranging the light emitting diodes 81 (see FIG. 4) according to the Fibonacci sequence, that is, by arranging the light emitting diodes 81 in a random non-lattice form, it is possible to install a relatively large number of light emitting diodes 81 in the illumination unit 8. Is possible. Along with this effect, light can be irregularly reflected by the non-lattice arrangement and the curved shape of the lower surface 8f, so that the illuminance can be maintained.

  According to the luminaire in which the blower is arranged at the center of the luminaire as in the luminaire 1 (see FIG. 1), the blower has a portion near the center of the luminaire 1 among the surfaces that irradiate light. By concealing, the illuminance may be lowered obliquely below the lighting fixture. Moreover, when a fan rotates, there exists a possibility that illumination intensity may fall as the lighting flickers. However, as shown in FIG. 4, by arranging the light emitting diodes 81 according to the Fibonacci sequence, even if some of the light emitting diodes 81 are hidden by the rotation of the propeller fan 60, Flickering of illumination can be suppressed by irregular reflection.

  On the other hand, FIG. 5 is a diagram schematically illustrating another example of the arrangement of the plurality of light emitting diodes attached to the illumination unit 8, and is a reduced cross-sectional view taken along the line IV-IV illustrated in FIG. 4 and 5 are compared, the arrangement of the light-emitting diodes 81 according to the Fibonacci sequence (see FIG. 4) is more limited in a limited space than the arrangement of the light-emitting diodes 82 in the honeycomb lattice shape (see FIG. 5). Since many can be installed, the fall of illumination intensity can be suppressed. Also in FIG. 5, illustration of the blades 6 (see FIG. 1) and the like is omitted.

  As described above, the blades 6 of the propeller fan 60 are disposed in the space 8c formed in the center of the illumination unit 8 (see FIG. 1). However, as for the position of the blade 6 in the direction along the vertical direction, a part of the blade 6 may be arranged in the space 12c (see FIG. 1). FIG. 6 is a longitudinal sectional view schematically showing the lighting apparatus 1 and is a view for explaining a preferable position of the blade 6 of the propeller fan 60 in the space. With respect to the direction along the vertical direction, the blade 6 is located at a position where the position of the lower end 6b of the blade 6 substantially coincides with the position of the upper end 8a of the illumination unit 8 and a position of the lower end 8e of the illumination unit 8 as shown in FIG. What is necessary is just to arrange | position between the position where the position of the lower end 6b of the blade | wing 6 substantially corresponds. In FIG. 6, the upper end 6 a and the lower end 6 b of the blade 6 indicated by a solid line are disposed between the upper end 8 a and the lower end 8 e of the illumination unit 8.

  In the lighting device 1, the front surface of the blade 6 disposed in the space 8c faces the indoor floor. On the other hand, the back surface of the blade 6 disposed in the space 8c faces the ceiling.

  As described above, the lighting fixture 1 includes the propeller fan 60 and the lighting unit 8. The propeller fan 60 includes a blade 6 and has a rotation axis extending in a substantially vertical direction. The illumination unit 8 includes a light emitting diode 81. The blade 6 is disposed in a space 8c formed at the center of the illumination unit 8, and the position of the lower end 6b of the blade 6 substantially coincides with the position of the upper end 8a of the illumination unit 8 in the direction along the vertical direction. And the position where the position of the lower end 6b of the blade 6 substantially coincides with the position of the lower end 8e of the illumination unit 8.

The lighting fixture 1 is located below the space 8c so as to be continuous with the space 8c and an opening portion 13 as a suction port for introducing air into the space 8c from above the blades 6 and outside the space 8c. An opening 14 is formed as a blowout port through which air is led out. In the lighting fixture 1, the diameter of the opening 14 and the diameter of the blade 6 are set so that air having a total air volume of 8 m ³ / min or more is blown out from the opening 14, and the propeller fan 60 rotates.

  In the luminaire 1, the blades 6 of the propeller fan 60 are arranged in the space 8 c formed in the center of the illuminating unit 8, so that the propeller fan 60 can be arranged compactly in the substantially horizontal direction. As for the direction along the vertical direction, the position of the lower end 6b of the blade 6 substantially coincides with the position of the upper end 8a of the illumination unit 8, and the position of the lower end 6b of the blade 6 matches the position of the lower end 8e of the illumination unit 8. The blade 6 is disposed between the substantially matching positions. Therefore, the propeller fan 60 can be disposed compactly in the substantially vertical direction by suppressing the propeller fan 60 from protruding from the illumination unit 8 along the vertical direction. Thereby, it is possible to prevent a resident in the room from feeling a sense of pressure. Moreover, the safety | security of the lighting fixture 1 improves with such a structure. For example, since the above-described cover or the like can be attached to the lower portion of the illumination unit 8, when the cover is attached as such, the blades 6 are prevented from being exposed toward the indoor space. For example, when the propeller fan 60 is driven and the play equipment such as a ball used indoors hits the propeller fan 60, the propeller fan 60, the motor 5, or peripheral parts may be damaged or dropped. In addition, it is expected that the fallen parts may damage indoor objects or cause serious damage such as injury to persons in the room. However, it is possible to minimize damage by attaching a cover or the like to the lower part of the illumination unit 8.

  Moreover, since the propeller fan 60 is arranged compactly in the luminaire 1, the luminaire 1 can be easily attached to the ceiling as compared with a conventional general ceiling fan. In order to arrange the propeller fan 60 in the lighting fixture 1 in a compact manner, it is possible to reduce the size and weight of the lighting fixture 1 and simplify the attachment to the ceiling.

Furthermore, in the lighting fixture 1, the air flow generated by the operation of the propeller fan 60 can be blown out substantially vertically downward by the opening 14 located below the space 8c so as to be continuous with the space 8c. The total air volume is 8 m ³ / min or more, and the airflow that moves substantially vertically downward in a space such as a room can stir the air in the room or circulate between the ceiling and the floor surface. . Therefore, the lighting fixture 1 can eliminate the uneven temperature distribution in the space to be air conditioned.

  By doing in this way, while providing the propeller fan 60 compactly, the lighting fixture 1 provided with the propeller fan 60 which can eliminate the uneven temperature distribution in the air conditioning target space is provided. be able to.

In the lighting apparatus 1, the diameter of the opening 14 and the diameter of the blade 6 are set so that air having a total air volume of 8 m ³ / min or more and 32 m ³ / min or less is blown out from the opening 14, and the propeller fan 60 Rotates.

  According to the range of the total air volume, the comfort in the room can be enhanced and noise generated by the operation of the propeller fan 60 can be suppressed.

  In the lighting fixture 1, the propeller fan 60 rotates so that the wind speed of the air blown out from the opening 14 is 0.6 m / s or more and 1.7 m / s or less.

  According to the range of the wind speed, the comfort in the room can be improved, and noise generated by the operation of the propeller fan 60 can be suppressed.

In the luminaire 1, the diameter d ₁ of the blade 6, between the diameter d ₀ of the opening 14, the relationship of d ₁ ≧ 0.8d ₀ holds.

  According to this configuration, the illumination unit 8 that covers the blade 6 on the outer side in the radial direction of the blade 6 can be optimally cooled by the rotation of the propeller fan 60. Thereby, deterioration of the illumination part 8 can be reduced.

  The illuminating unit 8 has a lower surface 8f facing the indoor floor in the illuminating unit 8. The lower surface 8f has an inclined portion inclined from the horizontal direction so as to extend obliquely downward in the vertical direction.

  With such a configuration, it is possible to suppress the occurrence of smudging (electrostatic friction) in the illumination unit 8. Therefore, it is possible to prevent dirt from adhering to the lighting fixture 1 due to static electricity, and thus it is possible to maintain a necessary illuminance for a long time.

  In the illumination unit 8, the plurality of light emitting diodes 81 are arranged according to the Fibonacci sequence. According to this configuration, a relatively large number of light emitting diodes 81 can be installed in the illumination unit 8. In addition, since the light can be irregularly reflected by the non-lattice arrangement and the curved surface shape of the lower surface 8f, the illuminance can be maintained.

  In addition, the light source which the illumination part 8 has should just emit light, such as a lamp | ramp, a fluorescent lamp, or EL (electroluminescence, inorganic or organic matter is not ask | required). The motor 5 and the shaft 5a may be configured such that only forward rotation is possible.

  In addition, the illumination part 8 may be attached with respect to the hanging part 11 by another structure. For example, the illuminating unit 8 may be fixed to the hanging part 11 so that a claw-like part provided in the illuminating part 8 is hooked in a concave part or hole formed in the hanging part 11. Alternatively, the claw-shaped part may be formed in the hanging part 11, and the concave part or hole may be formed in the illumination part 8.

  An ion generator may be disposed in the space 12c. The number of ion generators arranged in the space 12c is not particularly limited. Regarding the arrangement of the plurality of ion generators, it is preferable that two adjacent ion generators are equally spaced in the space 12c. Even if the ion generator is arranged outside the housing 12, the ion generator cannot be seen by a person who sees the luminaire 1 above the illumination unit 8 and directly in front of the floor. It is preferable that they are arranged at various positions.

  Examples of ions generated by the ion generator are positive ions and negative ions. However, examples of ions are not particularly limited. For example, in the case where ions are generated without specifying the ion species of positive ions and negative ions, the potential of the object to be attached floating in a space such as a room is removed by the charge of the ions, or It is possible to adjust the ion balance of a space such as a room. Or the apparatus which produces | generates charged fine particle water containing a radical component, for example may be arrange | positioned in the space 12c.

  Further, as described above, the lighting fixture 1 includes the propeller fan 60 and the lighting unit 8 including the light emitting diode 81 or the light emitting diode 82 as a light emitter. Propeller fan 60 includes blade 6 and motor 5 for rotating blade 6. Propeller fan 60 has a rotation axis extending in a substantially vertical direction.

The blades 6 are arranged in a space 8 c formed at the center of the illumination unit 8. Further, the blade 6 has a lower end 6b of the blade 6 at a position where the position of the lower end 6b of the blade 6 substantially coincides with the position of the upper end 8a of the illumination unit 8 and a position of the lower end 8e of the illumination unit 8 in the direction along the vertical direction. Between the positions substantially coincide with each other. The lighting fixture 1 is formed with an opening portion 13 as a suction port and an opening 14 as a blowout port. The opening portion 13 introduces air into the space 8 c from above the blade 6. The opening 14 is positioned below the space 8c so as to be continuous with the space 8c, and allows air to be led out of the space 8c. The luminaire 1 has Q ≦ 0.094N−15.8 when Q (m ³ / min) is the total air volume blown from the opening 14 and N (rpm) is the rotational speed of the motor 5. The rotation speed N of the motor 5 is controlled so as to hold. The total air volume Q is calculated based on the wind speed of the airflow measured substantially vertically below the propeller fan 60, that is, the wind speed of the airflow blown out from the opening 14.

  According to such a value of the rotation speed N of the motor 5, in many cases, the temperature difference in the room between about 0.1 m and 1.8 m above the floor can be suppressed to within 3 ° C.

In the lighting device 1, the rotation speed of the motor 5 N (rpm), between the diameter d ₀ of the aperture 14 as blow-out opening (mm), established relationship 0.74d ₀ ≦ N ≦ 2.19d ₀ Thus, the motor 5 is controlled.

  According to the value of the rotational speed N of the motor 5 as described above, the noise of the propeller fan 60 can be reduced while eliminating the uneven temperature distribution in the room.

(Second Embodiment)
FIG. 7 shows a lighting fixture 1a which is another example of the lighting fixture according to the present invention. The difference of the lighting fixture 1a of 2nd Embodiment from the lighting fixture 1 (refer FIG. 1) of 1st Embodiment is that the lighting fixture 1a is provided with the temperature sensor 50. FIG. The temperature sensor 50 detects the temperature of the airflow circulating in the room where the lighting fixture 1a is installed. The temperature sensor 50 is disposed in the space 12 and is attached to the partition wall 12b.

  FIG. 8 is a control block diagram showing control related to the lighting fixture 1a. The temperature sensor 50 is connected to the control unit 3. Based on the temperature detected by the temperature sensor 50, the control unit 3 controls driving of the motor 5. As will be described later, the control unit 3 controls the start or stop of driving of the motor 5 and the increase or decrease of the rotational speed of the motor 5. Thus, the luminaire 1a is a propeller fan based on the temperature of the airflow sucked into the opening portion (suction port) 13 or the temperature of the airflow blown out from the opening portion 13 and detected by the temperature detection unit 50. The rotational speed of 60 can be optimally controlled. In addition, the other structure of the lighting fixture 1a is the same as that of the lighting fixture 1 (refer FIG. 1) of 1st Embodiment. Therefore, description of these configurations is omitted.

  The luminaire 1a has a mode (automatic operation mode of the motor 5) for switching the rotation of the propeller fan 60 between OFF and ON based on the temperature detected by the temperature sensor 50. This mode can be executed when the user operates the remote controller 31 (see FIG. 8) to select, for example, “automatic operation”. For example, when an air conditioner (not shown) is operated as a heating operation in winter, warm air tends to accumulate near the ceiling. The propeller fan 60 that is rotated by driving the motor 5 can agitate the warm air accumulated near the ceiling. When the temperature sensor 50 (see FIG. 8) detects that the temperature of the entire space to be air conditioned is substantially constant, the driving of the motor 5 is stopped. By doing so, for example, in the winter, it is possible to blow out the minimum necessary wind for eliminating the uneven temperature distribution in the room from the lighting apparatus 1a, and the user can minimize the feeling that the sensible temperature is lowered by the wind. It is possible to stay at Even in the summer, since the minimum necessary wind for eliminating the uneven temperature distribution in the room can be blown out from the lighting apparatus 1a, the effect of air conditioning in the room can be improved.

  FIG. 9 is a flowchart of an example of control executed in the lighting fixture 1a (see FIG. 8), and an example of the execution flow of the first automatic operation mode as the automatic operation mode of the motor 5 (see FIG. 8). Indicates. For example, when “automatic operation” is selected by an operation of the remote controller 31 (see FIG. 8) by the user, the drive of the motor 5 is started and the control of the first automatic operation mode is started.

  In step S302, the temperature sensor 50 detects the temperature of the air near the opening 13 (both see FIG. 7). The temperature sensor 50 measures and detects temperature, for example, every minute. Information on the detected temperature is stored in, for example, the control unit 3 (see FIG. 8). The detected temperature information may be accumulated and stored, or may be updated each time.

  Subsequently, in step S303, it is determined whether or not the detected temperature has changed by 1 ° C. or more from the latest stored temperature. If it is determined that the detected temperature has changed by 1 ° C. or more from the most recently stored temperature, the motor 5 is driven in step S304 based on the determination that the temperature unevenness has not yet been resolved. Will continue. On the other hand, if it is determined that the difference (absolute value) between the detected temperature and the most recently stored temperature is less than 1 ° C., based on the determination that the temperature unevenness has been eliminated, in step S305. The drive of the motor 5 is turned off. At the same time as the driving of the motor 5 is turned off, or immediately after the driving of the motor 5 is turned off, the temperature that was used for the determination in step S303 and detected this time is used in the subsequent step S307. Stored as a reference value. In addition, the control part 3 (refer FIG. 8) performs the determination required about control. The control unit 3 has a function as a timer and a function as a memory. The lighting fixture 1 (refer FIG. 2) of 1st Embodiment similarly has the function which concerns on a determination, the function as a timer, and the function as a memory.

  In step S306 after step S305, the temperature of the air near the opening 13 is continuously detected. Subsequently, in step S307, it is determined whether or not the temperature (reference value) used in the determination in step S303 has changed by 3 ° C. or more. If it is determined in step S307 that there is no change of 3 ° C. or more, the driving of the motor 5 is stopped in step S308 based on the determination that the temperature distribution is not uneven. If it is determined in step S307 that the temperature has changed by 3 ° C. or more, the drive of the motor 5 is turned on in step S309 based on the determination that the temperature distribution is uneven. The flow from step S302 to step S309 is continued until the user operates the motor 5 to be turned off by the remote controller 31 (see FIG. 8). In addition, the lighting fixture 1a (refer FIG. 7) may be provided with an operation unit (not shown) for manually selecting or canceling the automatic operation mode of the motor 5.

  FIG. 10 is a diagram schematically showing the relationship between the temperature detected as the room temperature that changes according to the first automatic operation mode and the sequence of the first automatic operation mode. In FIG. 10, the vertical axis indicates the temperature detected by the temperature sensor 50, and the horizontal axis indicates ON or OFF of the drive of the motor 5 in time series. S302 to S309 shown in FIG. 10 show steps S302 to S309 in FIG.

  In the following, using FIG. 10, the temperature near the ceiling detected by the temperature sensor 50 (see FIG. 8) until the first automatic operation mode is started by the user's operation is X ° C., and is detected. A change in the temperature in the first automatic operation mode will be described. When driving of the motor 5 is started, for example, warm air near the ceiling is stirred by the propeller fan 60 and mixed with cold air near the floor. Thus, after the driving of the motor 5 is started, the temperature of the air flowing in from the opening portion 13 gradually decreases, so that the temperature detected by the temperature sensor 50 also gradually decreases. In such a temperature change process, the temperature is detected every other minute (step S302), and it is determined whether there is a difference of 1 ° C. or more between the temperature one minute before and the temperature detected this time. (Step S303).

  When the warm air near the ceiling and the cold air near the floor are almost completely mixed, air at a substantially constant temperature (Y ° C.) continues to flow from the opening portion 13. If it is determined in step S303 that there is no difference of 1 ° C. or more between the temperature one minute ago and the temperature detected this time, the driving of the motor 5 is stopped in step S305. Note that the temperature (Y ° C.) used for the determination in step S303 and detected this time is stored as a reference value.

  Even after the driving of the motor 5 is stopped, the temperature is continuously detected and stored every other minute (step S306). Further, it is determined whether or not the difference between the temperature detected and stored every other minute in step S306 and the temperature used in the determination in step S303 (reference value (Y ° C.)) is 3 ° C. or more. (Step S307). While it is determined that there is no difference of 3 ° C. or more, the driving of the motor 5 is stopped (step S308). On the other hand, when it is determined that there is a difference of 3 ° C. or more, that is, the temperature detected by the temperature sensor 50 (see FIG. 8) is (Y + 3) ° C. or more, the driving of the motor 5 is started ( Step S309). The sequence of the automatic operation mode of the motor 5 is continued until the user operates the motor 5 to be turned off by the remote controller 31 (see FIG. 8).

  In consideration of “ISO7730: 2005”, which is an international standard for the thermal index, it is preferable to set the threshold for determination in step S307 in the automatic operation mode of the motor 5 to (Y + 3) ° C. Further, in consideration of the object of the present invention to eliminate the temperature distribution unevenness in the air-conditioning target space, in step S303, as a further smaller threshold value, it can be considered that there is almost no temperature distribution unevenness. A temperature change smaller than 1.0 ° C. may be used as a determination threshold.

  FIG. 11 is a flowchart of another example of the control executed in the lighting fixture 1a (see FIG. 8), and shows an example of the execution flow of the second automatic operation mode. The second automatic operation mode is a mode in which the motor 5 is switched on and off at regular intervals. Similarly to the control in the first automatic operation mode, for example, when “automatic operation” is selected by the operation of the remote controller 31 (see FIG. 8) by the user, the driving of the motor 5 is started and the second operation is performed. Control of the automatic operation mode is started. In addition, the lighting fixture 1a (refer FIG. 8) can perform control in 2nd automatic operation mode irrespective of the presence or absence of the temperature sensor 50. FIG. That is, for the control in the second automatic operation mode, the lighting apparatus 1 (see FIG. 2) of the first embodiment that does not include a temperature sensor can also be executed.

  FIG. 12 is a diagram schematically showing the relationship between the temperature in the vicinity of the ceiling in the room, which changes according to the second automatic operation mode, and the sequence of the second automatic operation mode. In FIG. 12, the vertical axis indicates the temperature near the ceiling in the room, which changes in the second automatic operation mode, and the horizontal axis indicates ON / OFF of driving of the motor 5 in time series. S502 to S505 shown in FIG. 12 indicate steps S502 to S505 in FIG.

  In step S502, it is determined whether or not a predetermined time has elapsed since the start of driving of the motor 5 (see FIG. 7). If it is determined that the predetermined time has elapsed, the driving of the motor 5 is stopped in step S503. After the driving of the motor 5 is stopped, in step S504, it is determined whether another predetermined time, ie, a predetermined time has elapsed. If it is determined in step S504 that another fixed time has elapsed, the driving of the motor 5 is resumed in step S505. The flow from step S502 to step S505 is continued until the user operates the motor 5 to be turned off by the remote controller 31 (see FIG. 8).

  In the second automatic operation mode, even if the temperature X ° C. is detected before the start of the second automatic operation mode, the temperature in the vicinity of the opening 13 is obtained as a substantially constant temperature (that is, Y ° C.). It is preferable to repeatedly switch the driving of the motor 5 between ON and OFF so that () is detected. For example, it is preferable to stop driving the motor 5 for 30 minutes after driving the motor 5 for 5 minutes. That is, a preferable example of the fixed time used for the determination in step S502 is 5 minutes, and another preferable example of the fixed time used for the determination in step S504 is 30 minutes.

As an example of the first automatic operation mode and the second automatic operation mode, the case where the driving of the motor 5 is stopped (that is, turned off) and restarted (that is, turned on) has been described. However, the control for stopping the driving of the motor 5 may be replaced with a control for reducing the rotational speed of the motor 5. Control for starting driving of the motor 5 may be replaced with control for increasing the number of rotations of the motor 5. Even in such a case, it is preferable that 0.74d ₀ ≦ N ≦ 2.19d ₀ holds between the rotational speed N (rpm) of the motor 5 and the diameter d ₀ (mm).

  As described above, the lighting apparatus 1a includes the temperature sensor 50. The temperature sensor 50 detects the temperature of air flowing in from the opening portion 13. When the value of the temperature detected by the temperature sensor 50 is saturated within a predetermined range after the driving of the motor 5 is started, the lighting fixture 1a is configured such that the number of rotations decreases or the driving stops. The motor 5 is controlled.

  Furthermore, when the value of the temperature detected by the temperature sensor 50 rises above a predetermined value from when the motor 5 is controlled so that the number of rotations decreases, the lighting device 1a increases the number of rotations. Thus, the motor 5 is controlled. Or when the value of the temperature detected by the temperature sensor 50 rises above a predetermined value from when the motor 5 is controlled so as to stop driving, the lighting fixture 1a starts driving. The motor 5 is controlled.

  Moreover, the lighting fixture according to another situation of this invention is provided with the control part which functions as a timer. Furthermore, the said lighting fixture is provided with an air blower and the illumination part containing a light-emitting body. The blower includes a blade and a motor for rotating the blade. The blower has a rotation axis extending in a substantially vertical direction.

  In the luminaire, the blades are arranged in a space formed at the center of the illuminating unit. Further, in the direction along the vertical direction, the blade has a position where the position of the lower end of the blade substantially coincides with the position of the upper end of the illumination unit, and a position where the position of the lower end of the blade substantially coincides with the position of the lower end of the illumination unit. Arranged between. The lighting fixture is formed with an inlet and an outlet. The suction port introduces air into the space from above the blades. The air outlet is located below the space so as to be continuous with the space, and allows air to be led out of the space.

  The lighting fixture controls the motor so that the number of rotations decreases or the driving stops when a predetermined time elapses after the driving of the motor is started.

  In addition, when another predetermined time elapses from when the motor is controlled so that the rotation speed decreases, the lighting fixture controls the motor so that the rotation speed increases. Or when another predetermined time passes since the motor was controlled so that a drive might be stopped, the said lighting fixture controls a motor so that a drive may be started. Further, the luminaire performs a control for decreasing the rotation speed of the motor or a control for stopping the rotation of the motor and a control for increasing the rotation speed of the motor or a control for starting the rotation of the motor at regular intervals.

  In the following, embodiments of the present invention will be specifically described. In addition, the Example shown below is an example, Comprising: This invention is not limited to the following Example.

(Experimental example 1)
As one of the effects of the lighting fixture according to the present invention, it is possible to eliminate the uneven temperature distribution in the air-conditioning target room by generating an airflow that flows downward from the vicinity of the ceiling in a space such as a room. There is such an effect. In Experimental Example 1, in order to verify this effect, the above-described lighting device 1 (see FIG. 1) according to the present invention is installed on the ceiling of the room, and when the air is conditioned in the room, By rotating the propeller fan 60, the change in the temperature distribution in the room due to the airflow generated from the propeller fan 60 was confirmed. At this time, the diameter of the opening 14 as a blower outlet was 365 mm, and the diameter of the blade 6 of the propeller fan 60 was 320 mm.

  FIG. 13 is a schematic diagram showing measurement points of wind speed and measurement points of temperature difference in a room where Experimental Example 1 of the embodiment is performed, and is a view of the room along a substantially horizontal direction. FIG. 14 is a schematic diagram illustrating measurement points of wind speed and measurement points of temperature difference in a room where Experimental Example 1 of the embodiment is performed, and is a view of the room viewed from the ceiling toward the floor.

The lighting fixture 1 was installed in the approximate center of the ceiling of the room of experiment object which has a floor area of 13.0 m < ² >. The height from the indoor floor surface to the ceiling was 2400 mm. The wind speed and the total air volume of the air flow generated from the lighting fixture 1 were measured according to “8.9 wind speed test” of “JIS C9601: 1999 Fan”, and measured and calculated according to “8.10 air volume test”. First, the wind speed of the airflow was measured at a position P1 (see FIGS. 13 and 14) at a height of 120 cm from the floor and 5 cm away from the vertical lower side of the center C of the luminaire 1 in the horizontal direction.

  In the experimental room, the air conditioner was operated in a cooling operation (set temperature was 20 ° C.), and the measurement of the indoor temperature was started after the cooling operation was started. The room temperature is measured at a point 100 cm horizontally from the vertical lower side of the center C of the lighting fixture 1, at a position P 2 (see FIGS. 13 and 14) at a height of 180 cm from the floor and 5 cm from the floor. And a temperature at a position P3 (see FIGS. 13 and 14) at the height of. After 1 hour has elapsed since the start of the cooling operation, the propeller fan 60 was rotated. During the experiment, the light source of the lighting fixture 1 was turned off.

  At the time before 1 hour has passed since the start of the cooling operation and temperature measurement of the air conditioner, the temperature at the position P2 at a height of 180 cm from the floor and the temperature at a position P3 at a height of 5 cm. There was a temperature difference of about 6 ° C. between them. One hour after starting the temperature measurement, the cooling operation was continued and the rotation of the propeller fan 60 was started so that the propeller fan 60 was rotated at 880 rpm.

  FIG. 15 is a graph showing data obtained in Experimental Example 1 of the example. The graph of FIG. 15 shows a change in the temperature distribution in the room according to the total air volume of the airflow generated from the propeller fan 60.

When 5 minutes have passed since the rotation of the propeller fan 60, the temperature difference between the temperature at the position P2 at a height of 180 cm from the floor and the temperature at the position P3 at a height of 5 cm is 0.4. ° C. As described above, the operation of the propeller fan 60 of the lighting apparatus 1 clearly eliminated the temperature difference, that is, the uneven temperature distribution in the room. When the propeller fan 60 was rotated at 880 rpm, the total air volume measured and calculated was 67 m ³ / min (see FIG. 15), and the wind speed was 1.9 m / s.

Furthermore, in Experimental Example 1, the change in temperature difference according to the difference in the rotation speed of the propeller fan 60 was confirmed. As described above, after a temperature difference of about 6 ° C. is generated between the temperature at the position P2 at a height of 180 cm and the temperature at the position P3 at a height of 5 cm from the floor, the propeller fan 60 is rotated at a rotational speed of 600 rpm. Rotation started. When 5 minutes had passed since the rotation of the propeller fan 60, the temperature difference was 0.5 ° C. Thus, the temperature difference was clearly eliminated by the operation of the propeller fan 60. When the propeller fan 60 was rotated at 600 rpm, the total air volume measured and calculated was 32 m ³ / min (see FIG. 15), and the wind speed was 1.7 m / s.

Similarly, the rotation of the propeller fan 60 was started at a rotation speed of 400 rpm. When 5 minutes had passed since the rotation of the propeller fan 60, the temperature difference was 1.1 ° C. When propeller fan 60 rotates at 400 rpm, the total air volume measured and calculated was 8 m ³ / min (see FIG. 15), and the wind speed was 1.1 m / s.

Similarly, the rotation of the propeller fan 60 was started at a rotation speed of 200 rpm. When 5 minutes had passed since the rotation of the propeller fan 60, the temperature difference was 4.0 ° C. When propeller fan 60 rotates at 200 rpm, the total air volume measured and calculated was 3 m ³ / min (see FIG. 15), and the wind speed was 0.6 m / s.

By the way, “ISO7730: 2005”, which is an international standard for thermal index, recommends an upper and lower temperature difference of 3 ° C or less with respect to the upper and lower temperature distribution (10cm above the floor to 110cm above the floor is defined as up and down). ing. Therefore, in order to suppress the difference between the temperature at the position P2 at a height of 180 cm from the floor and the temperature at the position P3 at a height of 5 cm to less than 3 ° C., in other words, to eliminate the uneven temperature distribution in the room, 8 m It was confirmed that a total air volume of ³ / min or more was necessary.

(Experimental example 2)
In Experimental Example 2, the change in the noise value according to the values of the wind speed and the total air volume generated by the propeller fan 60, in other words, the change in the noise value according to the difference in the rotation speed of the propeller fan 60 was confirmed. As the noise value, the value of noise generated by the rotation of the propeller fan 60 of the lighting fixture 1 was measured. This noise value is a value obtained by installing a microphone at a position 120 cm above the floor and measuring the noise using the microphone. The height of 120 cm from the floor is assumed to be a sitting height when an adult male sits on a chair. In Experimental Example 2, as in Experimental Example 1, the value of the wind speed of the air flow generated by the propeller fan 60 was measured, and the value of the total air volume was calculated.

FIG. 16 is a graph showing data obtained in Experimental Example 2. As shown in FIG. 16, the noise value measured when the total air volume is 32 m ³ / min (wind speed is 1.7 m / s) was 44 db. The sound level of the noise value 40 db is a level indicating “air conditioner indoor unit”. The noise value measured when the total air volume was 67 m ³ / min (wind speed was 1.9 m / s) was 68 db.

  The sound level of the noise value 68 db is a level corresponding to the noise of a vacuum cleaner, for example. It is preferable to set the rotational speed of the propeller fan 60 and the like so that a noise value of 68 db or less is obtained indoors.

Furthermore, as shown in FIG. 16, when the total air volume is 32 m ³ / min or more and 67 m ³ / min or less (wind speed is 1.7 m / s or more and 1.9 m / s or less), the noise value rises relatively high. Because of the change in the rate, the noise value was expected to increase when the wind speed was higher than 1.7 m / s. Since it is generally said that the desirable sound level in daily life is 60 db as the upper limit, a more preferable example of the total air volume is 32 m ³ / min or less, and a more preferable example of the wind speed is 1.7 m. / S or less was confirmed.

(Experimental example 3)
In Experimental Example 3, the value of the sensible temperature with respect to the wind speed of the airflow generated by the propeller fan 60 and the set temperature in an air conditioner (not shown) are calculated based on the calculation formula of standard new effective temperature (SET). The difference was confirmed as indoor comfort. In Experimental Example 3, as in Experimental Example 1, the value of the wind speed of the air flow generated by the propeller fan 60 was measured, and the value of the total air volume was calculated.

  FIG. 17 is a graph showing data obtained in Experimental Example 3. The graph in FIG. 17 shows the relationship between the difference between the temperature of the air temperature generated by the propeller fan 60 and the temperature sensed by the air conditioner, that is, the room temperature, and the wind speed of the air current generated by the propeller fan 60. The value of the sensible temperature with respect to the wind speed of the airflow generated by the propeller fan 60 is calculated based on the calculation formula of the standard new effective temperature (SET). Of the calculation conditions for SET, clothing was set to clo = 0.7 by assuming summer clothes, metabolism was set to met = 1, and relative humidity was set to 60%, and SET was calculated. The set temperature in the air conditioner was set to 28 ° C., and the value obtained by subtracting the sensible temperature from the room temperature of 28 ° C. obtained by the air conditioner was plotted for each measured wind speed.

  As shown in FIG. 17, when the wind speed is 0.0 m / s, the difference between the room temperature and the sensory temperature is expressed as a negative value, so that the sensory temperature is higher than the room temperature. As the wind speed rises, the difference between the room temperature and the sensible temperature changes from a negative value to a positive value until the wind speed reaches 0.6 m / s, and the difference greatly changes at a relatively large rate of increase ( The change in the sensible temperature as a difference between the sensible temperature at the wind speed of 0.0 m / s and the sensible temperature at the wind speed of 0.6 m / s is 2.5 ° C.), so the wind speed is higher than 0.0. And when it is less than 0.6 m / s, it can be seen that the sensible temperature is drastically lowered.

  When the wind speed is 0.6 m / s or more, the slope of the difference between the room temperature and the sensory temperature is relatively small (the sensory temperature at the wind speed of 0.6 m / s and the sensory temperature at the wind speed of 2.0 m / s. Since the difference is 1.7 ° C.), saturation is expected even if the rotation speed of the propeller fan 60 is increased. However, when the wind speed is 0.6 m / s or more, the difference between the room temperature and the sensible temperature is expressed as a positive value. Therefore, the value of the wind speed for improving indoor comfort is 0.6 m / s or more. It is preferable that the wind speed is. However, even if the wind speed is made higher than 0.6 m / s, it is considered that the comfort obtained from the sensible temperature does not change.

As described above, according to Experimental Example 3, it was confirmed that a more comfortable sensible temperature can be obtained when the wind speed is 0.6 m / s or more. In the lighting fixture 1 (see FIG. 13), the total air volume obtained when the wind speed was 0.6 m / s was 3 m ³ / min. That is, when the wind speed and the total air volume are obtained from the lighting apparatus 1, the temperature of the person in the indoor space can be lowered, so that the comfort can be further improved. As described above, it was confirmed that the total air volume required for enhancing the indoor comfort was 3 m ³ / min or more and the wind speed was 0.6 m / s or more. In terms of noise, the wind speed is preferably 1.7 m / s or less and the total air volume is preferably 32 m ³ / min or less (see FIG. 16 and Experimental Example 2).

(Experimental example 4)
In Experimental Example 4, while changing the diameter of the blade 6 of the propeller fan 60 (both see FIG. 1) with respect to the diameter of the opening 14 serving as the air outlet, in the lighting device 1 (see FIG. 1) installed in the room. It confirmed about the temperature of the lighting fixture 1 which changes when propeller fan 60 is rotated. In Experimental Example 4, the diameter d ₁ of the blade 6, the diameter d ₀ of the opening 14 was changed in 0.71D ₀ or more and 0.93D ₀ or less.

FIG. 18 is a graph showing data obtained in Experimental Example 4. Graph of Figure 18, the diameter d ₁ of the blade 6 with respect to the diameter d ₀ of the opening 14 (see both FIGS. 1), the temperature of the upper end surface of the top wall 12a of the temperature of the luminaire 1 (see FIG. 1 either) Shows the relationship.

  The initial temperature of the upper end surface of the top wall 12a was measured after 3 hours had elapsed since the lighting unit 8 was turned on in a predetermined state (full lighting). The temperature of the upper end surface of the top wall 12a when the propeller fan 60 is rotated (the vertical axis in FIG. 18) is measured after the initial temperature is measured and after two hours have elapsed since the rotation of the propeller fan 60 is started. did. Regardless of the size of the diameter of the blade 6 used, the initial temperature was about 60 ° C.

After the rotation of the propeller fan 60 was started, the temperature of the lighting fixture 1 decreased at any diameter of the propeller fan 60 due to the influence of intake air generated by the rotation of the propeller fan 60. Specifically, when the diameter d _{1 of the} blade 6 (refer to FIG. 1) is 0.71d ₀ with respect to the diameter d _{0 of the} opening 14, it is about Δ4 ° C. and the diameter d ₁ is If 0.77d is ₀ was about Δ16 ℃.

As described above, according to Experimental Example 4, when the diameter d ₁ (see FIG. 1) of the blade 6 with respect to the diameter d ₀ of the opening 14 is 0.77 d ₀ , for example, 0.8 d ₀ or more, the lighting fixture 1 It was confirmed that it was possible to sufficiently cool. In the viewpoint of suppression of noise, the diameter d ₁ of the blade 6 with respect to the diameter d ₀ of the aperture 14 is preferably less than 0.9D _0.

According to the above examples, in order to eliminate the uneven temperature distribution in the room, it was confirmed that a preferable example of the total air flow is 8 m ³ / min or more. In addition, from the viewpoint of noise suppression, it was confirmed that an example of a preferable total air volume is 32 m ³ / min or less. Furthermore, from the viewpoint of indoor comfort, it was confirmed that an example of a preferable wind speed is 0.6 m / s or more and 1.7 m / s or less.

As for the diameter d ₁ of the blade 6 relative to the diameter d _{0 of the} opening 14 (see FIG. 1), a preferable example of the diameter d ₁ of the blade 6 is 0.8 d ₀ or more from the viewpoint of cooling the lighting fixture 1. . From the viewpoint of noise suppression, it was confirmed that a preferable example of the diameter d ₁ of the blade 6 is less than 0.9 d ₀ .

(Experimental example 5)
In Experimental Example 5, the lighting apparatus 1 (see FIG. 1) is installed on the ceiling of the room, and when the air is conditioned in the room, the propeller fan 60 is rotated to obtain a saturated temperature difference value, The difference between the temperature at the position P2 (see FIGS. 13 and 14) at a height of 180 cm from the floor and the temperature at a position at a height of about 10 cm from the floor was confirmed. In Experimental Example 5, as in Experimental Example 1, the value of the wind speed of the airflow generated by the propeller fan 60 was measured, and the value of the total air volume was calculated.

  In the experimental room, the air conditioner was operated in a heating operation at a predetermined set temperature, and the driving of the motor 5 was started after the heating operation was started. After starting the driving of the motor 5, at a predetermined rotational speed (Nrpm), a position P2 that is 100 cm horizontally from the vertical lower side of the center C of the luminaire 1a and is 180 cm high from the floor (see FIG. 13 and 14) and a temperature at a height of about 10 cm from the floor were measured, and the temperature difference, which was a saturated temperature difference, was confirmed.

FIG. 19 is a graph showing data obtained in Experimental Example 5. The graph of FIG. 19 is a graph showing the relationship between the rotational speed N (rpm) of the motor 5 (see FIG. 1) of the propeller fan 60 and the total air flow Q (m ³ / min) of the airflow generated from the propeller fan 60. And a graph showing the relationship between the rotational speed N (rpm) of the motor 5 and the saturation value of the temperature difference in the room.

As shown in FIG. 19, the value of Zenkazeryou speed was calculated when the ^{N = 200rpm Q (m 3 /} min), speed was calculated when the N = 880RPM Zenkazeryou Q (m ³ / Min) is a straight line L connecting with the value of Q / 0.094N-15.8. As shown in FIG. 29, when Q ≦ 0.094N-15.8 is satisfied, it is easy to exert the effect of suppressing the temperature difference in the room between about 0.1 m and 1.8 m on the floor within 3 ° C. It was confirmed that.

FIG. 20 is a graph showing data obtained in Experimental Example 5, and shows the horizontal axis of the relationship between the rotational speed N (rpm) of the motor 5 (see FIG. 1) and the saturation value of the temperature difference in the room. 5 is a graph in which the rotational speed N of 5 corresponds to the diameter d ₀ of the opening 14 (see FIG. 1).

As shown in FIG. 20, regarding the relationship between the rotational speed N of the motor 5 and the diameter d _{0 of the} opening 14, when the relational expression of N ≧ 0.74d ₀ holds, it is almost certainly about 0.1 m to 1. It was confirmed that the temperature difference between 8 m could be kept within 3 ° C.

FIG. 21 is a graph showing another data obtained in Experimental Example 5. The graph of FIG. 21 shows the change of the noise value according to the rotation speed of the motor 5. However, the rotational speed N of the motor 5 indicating the horizontal axis corresponds to the diameter d _{0 of the} opening 14. As for the noise value (dB), the noise value at a point approximately 1.0 m away from the lighting fixture 1 vertically downward was measured by the same method as in Experimental Example 2.

As shown in FIG. 21, regarding the relationship between the rotational speed N of the motor 5 and the diameter d _{0 of the} opening 14, when a relational expression of N ≦ 2.19d ₀ holds, about 1.0 m downward from the lighting fixture 1. It is possible to obtain a rotational speed N smaller than the rotational speed N at which the noise due to the rotation of the propeller fan 60 suddenly increases at a remote point. By controlling the rotational speed of the motor 5 in this way, it is possible to reduce the noise of the propeller fan 60 while eliminating the uneven temperature distribution in the room.

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of claims.

1: Lighting fixture, 5: Motor, 5a: Shaft, 6: Blade, 6a: Upper end, 6b: Lower end, 8: Illumination part, 8a: Upper end, 8c: Space, 8e: Lower end, 8f: Lower surface, 13: Suction port , 14: outlet, 60: propeller fan, 81: light emitting diode

Claims (5)

A lighting device comprising a blower including a blade and having a rotation axis extending in a substantially vertical direction, and an illumination unit including a light emitter,
The blade is disposed in a space formed in the center of the illumination unit, and the position along the vertical direction is such that the position of the lower end of the blade substantially coincides with the position of the upper end of the illumination unit, It is arranged between the position of the lower end of the wing and the position where the position of the lower end of the blade substantially coincides with
The lighting fixture includes a suction port that introduces air into the space from above the blades, and a blower that is positioned below the space so as to be continuous with the space and that guides air out of the space. An exit is formed,
The lighting fixture in which the diameter of the said blower outlet and the diameter of the said blade | wing are set, and the said air blower rotates so that the air whose total air volume is 8 m < ³ > / min or more is blown out from the said blower outlet. The diameter of the air outlet and the diameter of the blades are set so that air having a total air volume of 8 m ³ / min to 32 m ³ / min is blown from the air outlet, and the blower rotates. Item 2. A lighting apparatus according to item 1.   The lighting fixture according to claim 1 or 2, wherein the blower rotates so that a wind speed of air blown from the blowout port is 0.6 m / s or more and 1.7 m / s or less. The diameter d ₁ of the blade, between the diameter d ₀ of the air outlet, holds the relationship d ₁ ≧ 0.8d _0, lighting according to any one of claims 1 to 3 Instruments. The illumination unit has a lower surface facing an indoor floor in the illumination unit,
The said lower surface is a lighting fixture of any one of Claim 1- Claim 4 which has the inclination part which inclines from a horizontal direction so that it may extend toward diagonally perpendicular downward.

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