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Lighting device

A technology for lighting devices and power supply devices, which is applied to lighting devices, lighting device components, and lighting device cooling/heating devices, etc. Effect

Active Publication Date: 2020-03-24
MITSUBISHI ELECTRIC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the temperature of the light-emitting element becomes high due to the heat generated by the light-emitting element, the energy efficiency decreases, or the life of the light-emitting element becomes short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] figure 1 It is a perspective view of the lighting device 1A according to Embodiment 1 viewed obliquely from above. figure 2 It is a perspective view of the lighting device 1A according to Embodiment 1 viewed obliquely from below. image 3 It is a cross-sectional side view of the lighting device 1A according to the first embodiment. Figure 4 It is a cross-sectional view of the power supply unit 7 included in the lighting device 1A according to the first embodiment. Figure 5 It is a functional block diagram of the lighting device 1A of Embodiment 1. The lighting device 1A of Embodiment 1 shown in these figures is installed on the ceiling and irradiates light downward, so that it can be suitably used for illuminating a space lower than the lighting device 1A. In the following description, the up and down directions are determined based on the posture when the lighting device 1A is used. The lighting device 1A can be suitably used as, for example, a device that emits...

Embodiment approach 2

[0076] Below, refer to Figure 8 and Figure 9 , Embodiment 2 will be described, focusing on differences from Embodiment 1 described above, and descriptions of the same parts or corresponding parts will be simplified or omitted. Figure 8 It is a perspective view of the lighting device 1B according to Embodiment 2 viewed obliquely from above. Figure 9 It is a plan view of the lighting device 1B according to Embodiment 2 viewed from a direction perpendicular to the base 2 . In addition, in Figure 9 In the figure, the arm part 9b of the main body support 9 is cut|disconnected in the middle, and the state which removed the fixed part 9a is shown for easy observation. In addition, in Figure 9 In the figure, in order to facilitate understanding of the position of the power supply housing 7d, the outer edge of the power supply housing 7d is indicated by a thick dotted line.

[0077] Such as Figure 8 As shown, the lighting device 1B of Embodiment 2 differs from the lighting...

Embodiment approach 3

[0086] Below, refer to Figure 10 to Figure 12 , Embodiment 3 will be described, and the description will focus on the differences from the above-mentioned embodiment, and the description of the same parts or corresponding parts will be simplified or omitted. Figure 10 It is a perspective view of the lighting device 1C according to Embodiment 3 viewed obliquely from above. Figure 11 It is a cross-sectional side view of the lighting device 1C according to the third embodiment. Figure 11 It is a cross-sectional view of a power supply unit 7C included in the lighting device 1C according to the third embodiment.

[0087] The lighting device 1C includes a base 2 , a light emitting element 3 , a plurality of heat sinks 4 , a cooling fan 6 , a power supply unit 7C, and a power supply support 20 . Such as Figure 10 and Figure 11 As shown, the cooling fan 6 is arranged above the plurality of cooling fins 4 . The power supply unit 7C is located above the cooling fan 6 . The p...

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Abstract

This lighting device (1A) comprises a base (2), a light-emitting element disposed below the base (2), a plurality of heat dissipation fins (4) disposed above the base (2), a cooling fan (6) generatingan airflow for cooling the base (2) and the plurality of heat dissipation fins (4), and a power source device (7) having a light source driving circuit for causing the light-emitting element to light-up and a power source casing (7d) housing the light source driving circuit. The power source device (7) is disposed above the plurality of heat dissipation fins (4). The cooling fan (6) is disposed above the power source device (7). A base central line (BC) is a straight line passing through the center of the base (2) and perpendicular to the base (2). A power source central line (PC) is a straight line passing through the center of the power source casing (7d) and perpendicular to the base (2). The position of the power source central line (PC) is offset relative to the base central line (BC).

Description

technical field [0001] The present invention relates to lighting devices. Background technique [0002] Illuminating devices using light-emitting elements such as light-emitting diodes (LEDs) are widely used. When the temperature of the light-emitting element increases due to the heat generated by the light-emitting element, the energy efficiency decreases, or the life of the light-emitting element becomes short. Therefore, it is desired to have good heat dissipation performance for dissipating heat from the light-emitting element so as to prevent the temperature of the light-emitting element from becoming high. In particular, lighting devices for high ceilings installed on high ceilings in factories, warehouses, gymnasiums, athletic facilities, etc. are placed in an environment where the temperature is high, so cooling of light emitting elements becomes more important. [0003] Patent Document 1 below discloses a lighting device including a heat sink (40), a cooling fan (...

Claims

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Application Information

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IPC IPC(8): F21V29/67F21V23/00F21V29/503F21V29/508F21V29/77F21Y115/10F21Y115/20F21Y115/30
CPCF21V23/00F21V29/503F21V29/508F21V29/67F21V29/77
Inventor 松原大介伏江辽吉野勇人
Owner MITSUBISHI ELECTRIC CORP