JP2017130468A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of arranging a blower in a compact manner and capable of generating an air flow circulating the entire space in a room or the like.SOLUTION: A lighting fixture 1 includes a blower 60 and a lighting part 8 including a light source. At least part of the blower 60 is disposed in a space 8c formed at the center part of the lighting part 8. In the lighting fixture 1, a flow passage formation part having a suction part and a blowout part is formed. The suction part introduces air into the space 8c from a part upper than the blower 60. The blowout part includes an opening 14 continued to the space 8c and located under the space 8c. The lighting fixture 1 is mounted to a ceiling via a rosette 20 fitted to the ceiling in a room. A relationship of 0.1d<L<0.7d is satisfied between the sum L of a height between an upper end 8a of the lighting part 8 and an upper end of the lighting fixture 1 and a projection height of the rosette 20 projecting from the ceiling, and a diameter d of the opening 14.SELECTED DRAWING: Figure 1

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 circulates between a ceiling and a floor surface 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 compactly arranged with respect to the illuminator body. 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.

  In the air-conditioning lighting fixture described in Patent Document 3, a fan is disposed at the center of the lighting fixture. As described above, a fan as a blower that generates an air flow in a space such as a room is arranged in a compact manner 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 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 a sufficient circulation effect cannot be obtained by the normal operation of the centrifugal fan.

  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 apparatus described in Patent Document 3 is disposed 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. . 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.

  Then, the objective of this invention is providing the lighting fixture which can generate | occur | produce the airflow which circulates the whole space, such as a room | chamber interior, while it can arrange | position a blower compactly.

  The lighting fixture according to the present invention includes a blower and an illumination unit including a light source. At least a part of the blower is disposed in a space formed at the center of the illumination unit. A flow path forming part is formed in the lighting fixture. The flow path forming part has a suction part and a blowing part. The suction unit introduces air into the space from above the blower. A blowing part is arrange | positioned under the air blower, and guides air out of space.

  In the luminaire according to the present invention, at least a part of the blower is disposed in a space formed in the central portion of the illumination unit. The blowout part of the flow path forming part has a blowout opening that is continuous with the space and located below the space.

  The luminaire according to the present invention is installed on the ceiling via a rosette provided on the indoor ceiling. Between the sum L of the height between the upper end of the lighting unit and the upper end of the lighting fixture and the protruding height of the rosette protruding from the ceiling, and the diameter d of the outlet, 0.1d <L <0. The relationship 7d is established.

  According to the lighting fixture according to the present invention, since at least a part of the blower is disposed in the space formed in the central portion of the lighting unit, the blower can be disposed compactly on the lighting fixture. Moreover, in the lighting fixture according to the present invention, the airflow generated by the operation of the blower can be moved in the substantially vertical direction by the suction portion and the blowout portion in the flow path forming portion. Airflow that moves in a substantially vertical direction in a space such as a room can circulate between the ceiling and the floor. Thus, the luminaire according to the present invention can generate an airflow that circulates the entire space such as a room.

  Moreover, according to the lighting fixture according to the present invention, it is possible to increase the amount of air sucked in the flow path forming portion to the extent that necessary and sufficient airflow efficiency can be obtained. That is, the lighting fixture according to the present invention can efficiently suck in air having a flow rate necessary for obtaining a sufficient circulation effect in the entire room from the suction portion in the flow path forming portion.

  By doing in this way, while being able to arrange | position a blower compactly, the lighting fixture which can generate the airflow which circulates the whole space, such as a room | chamber interior, can be provided.

  As described above, according to the present invention, it is possible to provide a lighting apparatus that can arrange a blower in a compact manner and can generate an airflow that circulates in the entire space such as a room.

It is a longitudinal cross-sectional view which shows schematically the lighting fixture according to this invention. It is a longitudinal cross-sectional view which shows schematically the blade | wing of the cover member which opens the blower outlet in the lighting fixture according to this invention. It is a longitudinal cross-sectional view which shows schematically the blade | wing of the cover member which obstruct | occludes the blower outlet in the lighting fixture according to this invention. It is a longitudinal cross-sectional view of the cover member which shows roughly the groove | channel formed in the cover member in the lighting fixture according to this invention. It is a control block diagram which shows the control relation 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. FIG. 2 is a partial cross-sectional view of a lighting fixture according to the present invention, which is a sum L of a height H between the upper end of the lighting unit and the upper end of the lighting fixture in the lighting fixture and a protruding height T of the rosette; And it is a figure which shows the diameter d of a blower outlet. It is a graph which shows the data obtained in Experimental example 1 of an Example. It is a graph which shows the data obtained in Experimental example 2 of an Example.

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

  In FIG. 1, the lighting fixture 1 which is an example of the lighting fixture according to this invention is shown. As shown in FIG. 1, the lighting fixture 1 includes a blower 60 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 suspension parts 11 for hanging the illumination unit 8 below the partition wall 12b. And have. 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. Below the partition wall 12b, the blower 60 is disposed in a space 12c surrounded (or sandwiched) by the partition wall 12b and a fan cover 10 described later. 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). Moreover, the ion generator 50 is arrange | positioned in the space 12c. The ion generator 50 is attached to the lower surface of the partition wall 12b.

  The blower 60 is accommodated in the housing 12. The number of blowers 60 is one. The blower 60 and the housing 12 are not integrated, and the blower 60 is fixed to the housing 12 and the illumination unit 8 by attaching the blower 60 to the housing 12. The blower 60 includes a motor 5 as a drive unit, a blade unit 6, and a spinner 7 that fixes the shaft 5 a of the motor 5 and the blade unit 6. By connecting the motor 5 including the shaft 5a to the connecting portion 4 fixed to the partition wall 12b, the blower 60 is disposed in the space 12c.

  In order to generate an air flow having a flow rate sufficient to circulate in the room, it is desirable that the diameter of the blade portion 6 is, for example, 300 mm or more. 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, the blower 60, and the ion generator 50 are omitted.

  The illumination unit 8 is fixed to the connection unit 9 in the hanging unit 11. On the side surface of the illuminating unit 8, a projecting portion 82 that protrudes from the side surface toward the space 8c is formed. A magnet 98 is installed on the protrusion 82. A magnet 911 is installed at the lower end of the hanging portion 11. The connection part 9 connects the hanging part 11 and the illumination part 8 via magnets 98 and 911. The illuminating unit 8 includes a light emitting diode (not shown) as a light source, a substrate on which the light emitting diode is attached, a reflection sheet, and a cover member that diffuses light. A fan cover 10 is attached to the connection portion 9. The fan cover 10 is disposed below the blower 60.

  The illumination unit 8 has a substantially annular shape. The illumination unit 8 has an upper surface 8b. The upper end 8a of the illumination part 8 is located on the upper surface 8b. 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 | wing part 6 and the spinner 7 of the air blower 60 are arrange | positioned in the space 8c. Thus, at least a part of the blower 60 is arranged in the space 8c.

  A gap between two adjacent hanging portions 11, that is, an opening portion 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 blower 60. Or the opening part 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 air blower 60. FIG. When the motor 5 rotates forward, the opening functions as an upper suction part of the first flow path forming part. On the other hand, when the motor 5 rotates in the reverse direction, the opening portion functions as an upper blowing portion of the second flow path forming portion.

  The fan cover 10 has an opening 14 facing 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 a lower outlet of the first flow path forming unit. On the other hand, when the motor 5 rotates in the reverse direction, the opening 14 functions as a lower suction portion of the second flow path forming portion.

  Thus, the fan cover 10 forms a lower blowing part or a lower suction part. 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. An example of the first flow path forming portion as the flow path forming portion includes the upper surface 8 b of the illumination unit 8, the housing 12, and the fan cover 10. When the motor 5 rotates forward, the airflow sent by the blower 60 flows out downward from the space 12c through the opening 14. 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.

  An example of the second flow path forming unit includes the upper surface 8 b of the illumination unit 8, the housing 12, and the fan cover 10. When the motor 5 rotates in the reverse direction, the air flow sent out by the blower 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 below the fan cover 10, the airflow flows into the space 12 c from the opening 14. Thus, in the lighting fixture 1, the upper surface 8 b of the illumination unit 8, the housing 12, and the fan cover 10 are an example of a first channel formation unit and an example of a second channel formation unit. .

  A plurality of vanes 101 are attached to the fan cover 10. The wing plate 101 opens and closes the opening 14 and adjusts the direction and flow rate of the airflow sent from the opening 14 by the blower 60. Alternatively, the wing plate 101 adjusts the flow rate of the airflow introduced from the opening 14 into the space 12 c by opening and closing the opening 14.

  When the plate-like wing plate 101 closes the opening 14, the flow rate of the airflow flowing into the space 12c from the opening 14 or the airflow flowing out of the space 12c from the opening 14 is adjusted. Moreover, the direction of the airflow flowing out of the space 12c from the opening 14 is adjusted by changing the angle of the wing plate 101 with respect to the fan cover 10 and the horizontal plane. The wing plate 101 operates to automatically open the opening 14 by the wind pressure according to the flow rate of the airflow when the blower 60 rotates at a predetermined rotation speed or higher.

  FIG. 2 is a longitudinal sectional view schematically showing the wing plate 101 of the fan cover 10 that opens the opening 14. FIG. 3 is a longitudinal sectional view schematically showing the wing plate 101 of the fan cover 10 that closes the opening 14. As shown in FIG. 2, when the slat 101 opens the opening 14, an airflow flows upward or downward through the fan cover 10. On the other hand, when the wing plate 101 closes the opening 14 as shown in FIG. 3, the opening 14 is blocked, so that no airflow flows upward or downward between the upper surface and the lower surface of the fan cover 10. .

  FIG. 4 is a longitudinal sectional view of the fan cover 10 schematically showing the groove 102 formed in the fan cover 10. As shown in FIG. 4, a groove 102 is formed in the fan cover 10. The groove 102 is formed in a portion of the fan cover 10 that faces the space 12c (see FIG. 1). In the fan cover 10, the groove 102 is located above the blade 101 that closes the opening 14 (see FIG. 3). The fan cover 10 including the wing plate 101 has a substantially disk shape. Moreover, the edge as a part which contacts the illumination part 8 and the connection part 9 (all refer FIG. 1) in the fan cover 10 has a substantially cylindrical shape. The groove 102 is formed in the entire circumferential direction so as to extend along the circumferential direction of the inner peripheral surface 10 a of the edge of the fan cover 10.

  Note that the shape or size of the groove 102 is not particularly limited. For example, a plurality of grooves may be formed in a portion of the fan cover 10 that faces the space 12c (see FIG. 1). The shape and size of each groove may be different or the same. In addition, it is preferable that the space | interval of two adjacent grooves is equal intervals.

  FIG. 5 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 fan cover 10 (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, the illumination unit 8, the wing plate 101, and the ion generator 50. Under the control of the control unit 3, the lighting unit 8 switches between turning on and off a light source (not shown) 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.

  In addition, when the rotation speed of the motor 5 reaches more than a predetermined rotation speed by the control unit 3 detecting the rotation speed of the motor 5, the blade 101 opens the opening 14 (see FIG. 1). The control unit 3 may control the wing plate 101.

  FIG. 6 is a partial cross-sectional view of the luminaire 1, schematically showing an air flow circulating in a space such as a room. In the blower 60, when the blade portion 6 rotates forward with the motor 5 rotating forward, air is sucked into the space 12c from the vicinity of the ceiling and the air flows downward from the space 12c as shown by the arrows in FIG. . When the blade portion 6 rotates in reverse with the reverse rotation of the motor 5 in the blower 60, the air sent out by the blower 60 moves in the direction opposite to the arrow shown.

  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 shape protruding toward the ceiling. More specifically, the upper surface 8b has a curved shape protruding toward the ceiling and the space 8c. In the longitudinal section of the illuminating unit 8, the upper surface 8 b has a smooth curved shape that continues from the upper end 8 a to the lower end of the illuminating unit 8.

  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 flow efficiency 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, a negative pressure is generated around the blade portion 6 by the rotation of the blade portion 6 of the blower 60. Therefore, due to the pressure difference between the illumination unit 8 and the blower 60, the air flowing along the upper surface 8b of the illumination unit 8 easily flows to the periphery of the blade unit 6 of the blower 60 through the space 12c. Thus, according to the shape of the upper surface 8b of the illumination unit 8, the air flow efficiency can be improved.

  FIG. 7 is a partial cross-sectional view of the luminaire 1, where a height H between the upper end 8 a of the illuminating unit 8 and the upper end of the luminaire 1 in the luminaire 1 and a protruding height T of the rosette 20 are shown. It is a figure which shows the diameter d of the opening L as the sum L and the blower outlet. In the lighting fixture 1, the height H, the protrusion height T, and the diameter d are set so that the sum L of the height H and the protrusion height T of the rosette 20 is a predetermined value or more. Thus, in the lighting fixture 1, 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) and the ceiling of a general ceiling light and the sound of the blower 60 does not cause noise for people in the indoor space. The range.

  More specifically, a relationship of 0.1d <L <0.7d is established between the diameter d and the sum L of the height H and the protrusion height T.

  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 coincides with the bottom surface 20a 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 H between the upper end 8a of the illumination unit 8 and the upper end surface of the top wall 12a is from the upper end 8a of the illumination unit 8 to the ceiling. Approximate with distance.

  As mentioned above, the lighting fixture 1 is provided with the air blower 60 and the illumination part 8 containing a light source. At least a part of the blower 60 is disposed in a space 8 c formed in the center of the illumination unit 8. The lighting fixture 1 is formed with either the first flow path forming portion or the second flow path forming portion. The first flow path forming part has an upper suction part and a lower outlet part. The upper suction portion introduces air into the space 8c from above the blower 60. The lower blowing part is arranged below the blower 60 and leads air out of the space 8c.

  The second flow path forming part has a lower suction part and an upper blowing part. The lower suction portion is disposed below the blower 60 and introduces air into the space 8c. The upper blow-out unit guides air from the space 8 c above the blower 60.

  In the lighting fixture 1, at least a part of the blower 60 is disposed in a space 8 c formed in the center of the lighting unit 8. Thus, in the lighting fixture 1, the air blower 60 can be arrange | positioned compactly in the lighting fixture 1. FIG.

  Moreover, in the lighting fixture 1, the air flow generated by the operation of the blower 60 is caused by the upper suction portion and the lower blowing portion in the first flow passage forming portion, or the lower suction portion in the second flow passage forming portion. It can be moved in a substantially vertical direction by the upper blowing part. Airflow that moves in a substantially vertical direction in a space such as a room can circulate between the ceiling and the floor. Thus, the lighting fixture 1 can generate an airflow that circulates through the entire space such as a room.

  By doing in this way, while being able to arrange the air blower 60 compactly, the lighting fixture 1 which can generate the airflow which circulates the whole space, such as a room | chamber interior, can be provided.

  The lighting fixture 1 is installed on the ceiling via a rosette 20 provided on the ceiling of the room. The sum L of the height H between the upper end 8a of the illuminating unit 8 and the upper end of the lighting fixture 1 and the protruding height T of the rosette 20 protruding from the ceiling is not less than a predetermined value.

  According to this configuration, it is possible to earn the amount of air sucked in the first flow path forming part or the second flow path forming part to the extent that necessary and sufficient air flow efficiency can be obtained. In other words, according to this configuration, the luminaire 1 efficiently sucks in air having a flow rate necessary for obtaining a sufficient circulation effect in the entire room from the upper suction portion in the first flow path forming portion. Can do. Or the lighting fixture according to this invention can blow off the air of the flow volume required in order to acquire sufficient circulation effect in the whole room | chamber interior from the upper blowing part in a 2nd flow-path formation part. Therefore, air can be smoothly sucked from the lower suction part.

  In the lighting fixture 1, the lower outlet portion of the first flow path forming portion has an opening 14 that is continuous with the space 8 c and is located below the space 8 c. A relationship of 0.1d <L <0.7d is established between the diameter d of the opening 14 and the sum L of the height H and the protrusion height T.

  According to this configuration, necessary and sufficient airflow efficiency can be obtained.

  The lighting fixture 1 includes a fan cover 10. The fan cover 10 forms a lower blowing part or a lower suction part. The fan cover 10 has an opening 14 as a blower outlet, and a wing plate 101 is attached to the fan cover 10. The wing plate 101 opens and closes the opening 14 and adjusts the direction and flow rate of the airflow sent from the opening 14 by the blower 60.

  According to this configuration, by adjusting the direction and flow rate of the airflow sent out by the blower 60, the airflow can be distributed over the entire space such as the room, and the airflow is directly applied to a person or an object in the room. It can prevent hitting.

  In the luminaire 1, the slat 101 operates so as to open the opening 14 as the air outlet when the blower 60 rotates at a predetermined rotational speed or more.

  According to this configuration, when the blower 60 rotates at a rotational speed lower than a predetermined rotational speed, such as when the blower 60 does not operate, the fan 101 including the vane 101 is closed by closing the opening 14. The blower 60 can be hidden by the cover 10. Therefore, the appearance of the lighting fixture 1 can be improved.

  Further, for example, when the operation of the blower 60 is resumed from a state in which the blower 60 has not been operated for a long period of time, the blower 60 accumulates around the blower 60 and the blower 60 while the blower 60 rotates at a relatively low speed. The collected dust can be captured by the fan cover 10. When the wing plate 101 opens the opening 14, the user can remove the dust attached to the fan cover 10 including the wing plate 101 from the wing plate 101 by cleaning the wing plate 101. Thus, according to this configuration, it is possible to prevent dust from being scattered in a space such as a room.

  A groove 102 is formed in a portion of the fan cover 10 facing the space 8c. According to this configuration, when the dust accumulated around the blower 60 and the blower 60 is scattered by the rotation of the blower 60, these dusts can be captured by the grooves 102. Therefore, dust can be prevented from being scattered in a space such as a room. Moreover, since dust is collected in the groove | channel 102, the lighting fixture 1 can be cleaned easily.

  In the luminaire 1, the illumination unit 8 has an upper surface 8 b facing the indoor ceiling in the illumination unit 8. The upper surface 8b of the illumination unit 8 has a curved surface shape that protrudes toward the ceiling.

  According to this configuration, when the air is sucked in, the illumination unit 8 creates a pressure difference between the space around the illumination unit 8 and the blower 60, so that the side of the blower 60 becomes negative pressure. A lot of air can be sucked into the blower 60 side from the surrounding space. That is, the air flow efficiency can be improved. Further, it is possible to make it difficult for dust to accumulate on the upper surface 8 b of the illumination unit 8, and it is possible to easily collect dust on the fan cover 10.

  The luminaire 1 includes an ion generator 50 that emits ions into the space 8c.

  According to this structure, the ion discharge | released from the ion generator 50 can be efficiently included in the airflow sent by the air blower 60. FIG.

  In addition, the number of the ion generators 50 arrange | positioned in the space 12c is not specifically limited. Moreover, about the arrangement | positioning of the ion generator 50, the ion generator 50 should just be arrange | positioned in the space 12c. About arrangement | positioning of the several ion generator 50, it is preferable that the two adjacent ion generators 50 are equidistant in the space 12c. In addition, even if the ion generator 50 is disposed outside the housing 12, the position above the lighting unit 8 so that the ion generator 50 cannot be seen by a person viewing the lighting device 1 directly in front of the floor surface. In addition, it is preferable that the ion generator 50 is disposed.

  Examples of ions generated by the ion generator 50 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. The ion generator 50 may be a device that generates charged fine particle water containing a radical component, for example.

  The light source of the illumination unit 8 may be a lamp or a fluorescent lamp, or may be electroluminescence.

  The motor 5 and the shaft 5a may be configured such that only forward rotation is possible. In this case, the second flow path forming portion is not formed in the lighting fixture 1, and the upper surface 8b of the lighting portion 8, the housing 12, and the fan cover 10 are included in an example of the first flow path forming portion.

  Note that the fan cover 10 as the cover member may be a part of the housing 12. The fan cover 10 is attached to the connection portion 9 which is the lower portion of the hanging portion 11 of the housing 12, so that the bottom portion of the housing 12 is formed by the fan cover 10.

  In addition, the lighting fixture according to another one situation of this invention is equipped with an air blower, an illumination part, and a housing | casing. The illumination unit includes a light source. The housing has a space for housing the blower and supports the illumination unit. At least a part of the blower is disposed in a space formed in the center of the illumination unit in the space inside the housing. One of the first flow path forming portion and the second flow path forming portion is formed in the lighting fixture. The first flow path forming part has an upper suction part and a lower outlet part. The upper suction portion introduces air into the space of the housing from above the blower. The lower blowing part is arranged below the blower and allows air to be led out of the space of the housing. The second flow path forming part has a lower suction part and an upper blowing part. The lower suction portion is disposed below the blower and introduces air into the space of the housing. The upper blow-out unit guides air from the space of the housing above the blower.

  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.

   In an Example, it confirms about the air volume efficiency of the lighting fixture 1 by the airflow which generate | occur | produces when rotating the blade | wing part 6 of the air blower 60 in the lighting fixture 1 and the noise of the lighting fixture 1 using the lighting fixture 1 mentioned above. did. In the Example, the diameter of the blade | wing part 6 of the air blower 60 was 320 mm. Further, regarding the diameter d of the opening 14 serving as the air outlet, by ignoring the dimension of the edge of the fan cover 10, the diameter of the opening at the lower end of the central portion of the illuminating unit 8 is changed to the diameter d of the opening 14 of the fan cover 10. Considered. As the diameter d of the opening 14, the diameter of the opening at the lower end of the central portion of the illumination unit 8 was 350 mm.

(Experimental example 1)
In Experimental Example 1, the airflow efficiency of the lighting fixture 1 was confirmed.
FIG. 8 is a graph showing data obtained in Example 1. The graph shown in FIG. 8 shows the height H between the upper end 8a of the lighting unit 8 and the upper end of the lighting fixture 1 in the lighting fixture 1 (see FIG. 7) and the protruding height T of the rosette 20 (both in FIG. 8). 7) and the air flow efficiency represented by the blowout amount with respect to the air suction amount. In the following, the sum L of the height H and the protrusion height T is referred to as a distance L from the ceiling to the upper end 8a of the illumination unit 8.

  FIG. 8 shows the air blown from the space 8c through the opening 14 (see FIG. 7) with respect to the suction amount (the flow rate of air sucked into the space 8c from above the illumination unit 8) according to the distance L. Is a graph in which the ratio of the flow rate is plotted as the air flow efficiency. The vertical axis of the graph shows the air flow efficiency (%), and the horizontal axis shows the distance L (mm).

  As shown in FIG. 8, the air flow efficiency increased rapidly when the distance L was 0.1d to 0.7d, that is, 35mm to 245mm. However, when the distance L is 0.7 d or more, that is, 245 mm or more, the air flow efficiency is substantially saturated.

  As described above, according to Experimental Example 1, when the height H, the protrusion height T, and the diameter d are set in the lighting fixture 1 such that the distance L is 0.1 d to 0.7 d, the distance L is high. It was confirmed that the air flow efficiency can be obtained.

(Experimental example 2)
In Experimental Example 2, the noise of the lighting fixture 1 was confirmed.
FIG. 9 is a graph showing data obtained in Example 2. The graph shown in FIG. 9 shows the relationship between the distance L and the noise generated by the blower. Noise A is a noise value (dB) measured at a position 100 mm below the lighting fixture 1.

  On the other hand, the noise B is a plot of the noise value (dB) felt by the observer in the indoor space of the experiment target where the lighting apparatus 1 is installed as the lighting apparatus 1 approaches the observer according to the distance L. It is. The height of the observer was about 170 cm (reference: average height of Japanese men aged 40 to 49 years old, Ministry of Health, Labor and Welfare 2010 National Health and Nutrition Survey Report). Moreover, the height from the floor surface in the room where the observer entered to the ceiling was 240 cm. The degree of noise felt by the observer is a value obtained by installing a microphone near the observer's ear and measuring the noise using the microphone.

  As shown in FIG. 9, it can be seen that the noise A decreases as the distance L increases (as the position of the upper end 8a (see FIG. 7) of the illumination unit 8 moves downward from the ceiling). That is, most of the noise A is occupied by the sound generated by the airflow sucked into the space 12c. When the distance L = 0, the value of the noise A was 68.0 dB. When the distance L = 0.7 d (that is, 245 mm), the value of the noise A was 40.5 dB.

  The noise B decreased for a while from the distance L = 0 in the same manner as the noise A. In the process of reducing the noise B in this way, most of the noise B is occupied by the sound generated by the airflow sucked into the space 12c. On the other hand, once the distance L≈0.4d, the noise value once decreased started to increase. That is, the operation of the blower 60 is started from the state in which the noise caused by the airflow sucked into the space 12c occupies most of the noise B with the distance L≈0.4d as the luminaire 1 approaches the observer. It was switched to the state where the noise caused by the sound occupies most of the noise B.

  As described above, according to Experimental Example 2, when the height H, the protrusion height T, and the diameter d are set in the lighting fixture 1 so that the distance L is 0.7 d or less, noise is suppressed. It was confirmed that it was possible.

  In this way, between the diameter d of the opening 14 serving as the air outlet and the sum L of the height H and the protruding height T (that is, the distance L from the ceiling to the upper end 8a of the illumination unit 8), 0 By setting the height H, the protrusion height T, and the diameter d so that the relationship of .1d <L <0.7d is established, high air flow efficiency can be obtained and noise can be suppressed. It was confirmed.

  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.

  DESCRIPTION OF SYMBOLS 1: Lighting fixture, 8: Illumination part, 8a: Upper end, 8b: Upper surface, 10: Fan cover, 12: Housing | casing, 12a: Top wall, 13: Opening, 14: Opening, 20: Rosette, 50: Ion generator , 60: blower, 101: blade, 102: groove

Claims (1)

A lighting fixture comprising a blower and an illumination unit including a light source,
At least a part of the blower is disposed in a space formed in the center of the illumination unit,
A flow path forming portion is formed having a suction portion that introduces air into the space from above the blower, and a blowout portion that is disposed below the blower and leads air out of the space,
The outlet part of the flow path forming part has an outlet that is continuous with the space and located below the space,
The lighting apparatus is installed on the ceiling via a rosette provided on the ceiling of the room,
Between the sum L of the height between the upper end of the illuminating unit and the upper end of the lighting fixture and the protruding height of the rosette protruding from the ceiling, and the diameter d of the outlet, 0.1d < A lighting fixture that satisfies the relationship of L <0.7d.

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