TWI408311B - Lamp and heat sink thereof - Google Patents

Abstract

A lamp comprises a housing (1, 1'), a heat sink (2, 7), a fan (3, 6) and a light-emitting element (42). The housing (1, 1') includes an opening end (11, 11') and a compartment (12, 12') communicating with the opening end (11, 11'). The lamp is characterized in that the heat sink (2, 7) is disposed at the opening end (11, 11') and includes a lateral wall (21, 71), a base (22, 72), a plurality of first connection members (23, 73), a plurality of first air channels (24, 74) and at least one second air channel (25, 75). The base (22, 72) is surrounded by and spaced from the lateral wall (21, 71). The base (22, 72) is connected to an inner circumferential wall of the lateral wall (21, 71) via the first connection members (23, 73), wherein each of the first air channels (24, 74) is formed between adjacent two of the first connection members (23, 73). The at least one second air channel (25, 75) is formed between an outer circumferential wall of the lateral wall (21, 71) and an inner face of the housing (1, 1'). The fan (3, 6) is disposed at one side of the heat sink (2, 7) in the compartment (12, 12'). The light-emitting element (42) is disposed at another side of the heat sink (2, 7).

Description

Lamp and its radiator

The present invention relates to a luminaire and a heat sink thereof, and more particularly to a luminaire and a heat sink thereof, which utilize a fan to drive air circulation to assist heat dissipation, and are more suitable for embedded occasions to provide indoor or outdoor illumination.

The conventional lamp structure, such as the Republic of China Announcement M330426 "Lamp Heat Dissipation Structure" patent case, please refer to Figure 1 as shown in Figure 1, which is flipped 180 degrees according to the actual installation direction of the lamp. The lamp has a heat sink body 81. A circuit board 82, a light-emitting diode 83, a heat-dissipating fan 84, and a base 85. The heat sink body 81 has a recessed portion 811 and a receiving portion 812. The circuit board 82 and the light emitting diode 83 are disposed in the recessed portion 811. The heat dissipating fan 84 is disposed in the receiving portion 812. The base 85 is coupled to the outside of the receiving portion 812. The heat dissipation body 81 is further provided with a plurality of heat dissipation holes 813 penetrating the accommodating portion 812. The lamp head 85 is provided with a plurality of air guiding holes 851. Therefore, when the heat dissipation fan 84 is operated, the air can be driven through the air. Each of the air guiding holes 851 is sucked into the accommodating portion 812 and discharged from each of the heat dissipating holes 813 to dissipate the heat energy generated by the lamp cap 85.

When it is used, the base 85 is coupled to a socket, and the heat dissipation holes 813 and the air guiding holes 851 are exposed, so that the air in the receiving portion 812 can circulate with the outside. However, the air guiding holes 851 of the conventional structure for taking in air are located above the lamp, and based on the principle of rising hot air, the hot air discharged from the heat dissipation holes 813 rises and accumulates in the air. The luminaire is surrounded by the upper part and is again sucked through each of the air guiding holes 851, thereby affecting the heat dissipation performance. Moreover, in order to meet the overall aesthetic requirements of the decoration, the luminaire must be embedded and hidden, and since the vents 813 and the air guiding holes 851 are embedded in the ceiling of the decorative compartment, only the illuminating light is retained. The part of the polar body 83 is exposed on the ceiling surface, but the space between the ceiling and the concrete floor board of the building itself is generally closed, and the space is not easy to circulate with the outside air, which affects the air circulation effect and the heat dissipation performance, thereby generating heat accumulation. The problem affects the service life of the luminaire.

Another conventional lamp structure, such as the Republic of China Announcement No. M346745 "end-to-end heat-discharge LED lamp" patent case, and with reference to Figure 2, the lamp has an upper case 91, a lower case 92, and a heat dissipating component 93 and an LED lamp set 94, the upper casing 91 has an accommodating space 911 therein, and the upper casing 91 and the lower casing 92 can be assembled to form a lamp housing, and the heat dissipating component 93 and the LED lamp set 94 are disposed on The accommodation space 911 is inside. The upper casing 91 is provided with a plurality of ventilation holes 912. The lower casing 92 is provided with a plurality of penetration holes 921. Therefore, when the heat dissipation fan 931 of the heat dissipation assembly 93 is operated, air can be driven through the ventilation holes 912. The accommodating space 911 is sucked into the accommodating space 911 and discharged through the through holes 921 to dissipate the heat energy generated by the LED lamp group 94.

However, the venting holes 912 of the conventional structure for taking in air are also located above the luminaire, so that the hot air discharged from each of the penetrating holes 921 also rises, and is again passed through each of the vent holes 912. Inhalation, affecting heat dissipation. Moreover, when the conventional structure is embedded and hidden, although the through holes 921 are exposed on the ceiling surface, each of the vent holes 912 is still buried above the ceiling, so there is still air circulation and heat dissipation performance. , which in turn generates heat and affects the life of the lamp.

The object of the present invention is to provide a lamp and a heat sink thereof, which can improve the heat dissipation performance of the lamp.

Another object of the present invention is to provide a luminaire and a heat sink thereof that extend the life of the luminaire.

Still another object of the present invention is to provide a luminaire and a heat sink thereof that avoids the generation of turbulence.

A lamp according to the present invention comprises: a cover having an opening, and a cavity recessed by the opening; a heat sink disposed at the opening, the heat sink having a side wall, a body, and a plurality of first connections a first air flow passage and a second air flow passage, the seat body is located in the side wall and has a gap with the inner peripheral wall of the side wall, and the seat system is connected to the side wall by each of the first connecting members The inner peripheral wall, the first air flow passage is formed between any two adjacent first connecting members, and the second air flow passage is formed between the outer peripheral wall of the side wall and the wall of the inner chamber; a fan , located in the chamber and disposed on one side of the heat sink; and a light-emitting element disposed on the other side of the heat sink.

A heat sink for a lamp according to the present invention has a side wall, a body, a plurality of first connecting members, a plurality of first air flow passages, and a second connecting member, wherein the seat body is located in the side wall and is opposite to the side wall The inner wall of the wall has a gap, and the seat system is connected to the inner peripheral wall of the side wall by each of the first connecting members, and the first air flow passage is formed between any two adjacent first connecting members at the gap, the first air flow passage The two connecting members are disposed on the outer peripheral wall of the side wall.

The above and other objects, features, and advantages of the present invention will become more apparent from the claims. The luminaire according to the first embodiment of the present invention comprises a cover 1, a heat sink 2, a fan 3 and a light-emitting element 4. The heat sink 2 is disposed between the fan 3 and the light-emitting element 4, and the cover 1 is disposed outside the heat sink 2. Therefore, when the fan 3 is in operation, the air can be driven to be inhaled through the heat sink 2. And blowing, the air in the outer cover 1 can be circulated to the outside to dissipate the heat energy generated by the light-emitting element 4.

One end of the outer cover 1 has an opening 11, and a cavity 12 is recessed by the opening 11.

Referring to Figures 3 and 4, the heat sink 2 is disposed at the opening 11 of the outer cover 1, and is preferably made of a material having a high thermal conductivity. The heat sink 2 has a side wall 21 and a wall. The body 22 has a plurality of first connecting members 23, a plurality of first air flow passages 24 and a second air flow passage 25.

The side wall 21 can be a ring wall, the seat body 22 is located at the center of the side wall 21, the seat body 22 has a gap between the inner wall of the side wall 21, and the seat body 22 is made by the first The connecting member 23 is connected to the inner peripheral wall of the side wall 21, so that the first air flow passage 24 is formed between any two adjacent first connecting members 23 at the gap, and each of the first air flow passages 24 has two ends. The first end is connected to the chamber 12, and the second end is exposed at the opening 11. The body 22 has a first surface 221 opposite to the first surface 221 and a second surface 222 facing the chamber 12, and the second surface 222 faces away from the chamber 12. Each of the first connecting members 23 can be a fin and extend radially inward from the inner peripheral wall of the side wall 21, so that the first connecting members 23 protrude from the first surface 221 to increase The heat dissipation area of the first surface 221 is further provided with a convex portion 223 in the center of the first surface 221 .

The second air flow passage 25 is formed between the outer peripheral wall of the side wall 21 and the inner wall surface of the chamber 12. In the embodiment, the outer peripheral wall of the side wall 21 is provided with a plurality of second connecting members 26 in the radial direction. And each of the second connecting members 26 can be a fin to increase the heat dissipation area of the inner wall surface of the second air flow passage 25, and the second air flow passage 25 has two ends, wherein the first end is connected to the chamber 12, the second end is exposed at the opening 11. Each of the second connecting members 26 can be integrally extended radially outwardly from the outer peripheral wall of the side wall 21, and an outer ring portion 27 is further connected to each of the second connecting members 26, and the outer ring portion 27 can be a continuous ring body (as shown) or a discontinuous ring body composed of a plurality of coupling members, and the heat sink 2 can be coupled to the outer cover 1 through the outer ring portion 27, and the side wall is 21 protrudes from the opening 11.

In addition, the side wall 21 has a first end edge 211 and a second end edge 212. The first end edge 211 is identical to the first surface 221 of the base 22 toward the chamber 12, and the second end The edge 212 preferably protrudes from the opening 11 of the outer cover 1 along the axis of the shaft, and the second end edge 212 can also protrude from the second surface 222, so that the side wall 21 can be the first one. The airflow passage 24 and the second end of the second airflow passage 25 are effectively spaced apart.

The fan 3 is located in the chamber 12, and the fan 3 has two airflow ports 30a, 30b, such that the first end of each of the first airflow channels 24 communicates with one of the airflow ports 30b, and the second airflow channel 25 The first end is connected to the other air flow port 30a. Therefore, the air can be guided to flow between the first air flow path 24 and the second air flow path 25 via the fan 3. The frame 31 of the fan 3 is provided with a plurality of assembly portions 32, and the side wall 21 can also be provided with a plurality of fixing portions 213 to provide a plurality of fixing elements for fixing the fan 3 to the heat sink 2 through the assembly portions 32. on.

The light-emitting element 4 has a substrate 41 and at least one illuminant 42. The illuminant 42 is preferably selected as a light-emitting diode, and the illuminant 42 is disposed on one side of the substrate 41.

Referring to FIGS. 3 and 5, after the components of the first embodiment of the present invention are assembled, the fan 3 and the light-emitting component 4 are respectively disposed on two sides of the heat sink 2, and the fan 3 is oriented toward the first The surface 221, and the protrusion 223 can support the positioning of the fan 3. The light-emitting element 4 is connected to the second surface 222 by the substrate 41. The heat sink 2 is coupled to the opening 11 of the outer cover 1 through the outer ring portion 27 such that the fan 3 is located in the chamber 12, and the illuminant 42 is exposed at the opening 11. Moreover, each of the first airflow channel 24 and the second airflow channel 25 are connected between the two sides of the heat sink 2, and the first end of each of the first airflow channel 24 and the second airflow channel 25 are respectively Connecting the airflow ports 30b and 30a of the fan 3, the second ends of the first airflow channel 24 and the second airflow channel 25 are exposed to the opening 11, and the first airflow channel 24 and the second The second end of the air flow passage 25 has a height difference in the axial direction, so that the outer air outside the luminaire can be sucked into the chamber 12 via one of the first air flow passage 24 and the second air flow passage 25, and the other Is exported.

Referring to FIG. 5, when the lamp according to the first embodiment of the present invention is implemented, the cover 1 is embedded above a ceiling 5, and the outer ring portion 27 is preferably attached to the surface of the ceiling 5. When the fan 3 is in operation, air can be driven into the chamber 12 via one of the first air flow passage 24 and the second air flow passage 25, and is led out by another to assist in dispersing the light-emitting element 4. Thermal energy. Moreover, the present invention can change the direction of flow of air by controlling the direction of the forward and reverse rotation of the fan 3. For example, when the fan 3 rotates in the reverse direction, air is driven from the second air flow passage 25 to the chamber 12, and after passing through the fan 3, and blown through each of the first air flow passages 24. On the contrary, when the fan 3 rotates in the forward direction, the air is driven from the first air flow passage 24 to the chamber 12, and after passing through the fan 3, is blown out through the second air flow passage 25 to assist in dispersing the air. The thermal energy generated by the light-emitting element 4.

However, regardless of the direction of circulation of the air, each of the first air flow passage 24 and the second air flow passage 25 of the present invention are exposed on the surface of the ceiling 5, and can smoothly circulate with the outside air. Moreover, each of the first air flow channel 24 and the second air flow channel 25 has a height difference in the axial direction, and the side wall 21 can respectively be the first air flow channel 24 and the second air flow channel 25 The two ends are separated to effectively separate the air sucked in and out to avoid turbulence, and the hot air discharged from the lamp can be prevented from being immediately sucked back into the chamber 12 to provide better air. Flow effect and heat dissipation performance.

Referring to Figures 6 and 7, a lamp according to a second embodiment of the present invention also includes a cover 1, a heat sink 2, a fan 6, and a light-emitting element 4. The frame 61 of the fan 6 also has structural features such as two airflow ports 60a, 60b, a frame 61, and a plurality of assembly portions 62.

Compared with the foregoing first embodiment, the second embodiment is further provided with a blocking portion 63 on the frame 61 of the fan 6, and the blocking portion 63 is an annular plate body extending outward from the outer circumference of the frame 61, and The outer periphery of the blocking portion 63 preferably covers the first end edge 211 of the side wall 21.

Therefore, when the fan 6 is rotated in the reverse direction, air can be driven from the second air flow passage 25 to the chamber 12, and after passing through the fan 6, and blown through each of the first air flow passages 24. And when the fan 6 rotates in the forward direction, air can be driven from each of the first air flow passages 24 to the chamber 12, and is blown out through the second air flow passage 25 after passing through the fan 6.

However, regardless of the direction of flow of the air, the blocking portion 63 can further guide the air in the first air flow passage 24 and the second air flow passage 25 to flow through each other through the air flow ports 60a, 60b of the fan 6. To ensure that the air circulates in a fixed channel to avoid turbulence.

Referring to Fig. 8, a lamp according to a third embodiment of the present invention also includes a cover 1', a heat sink 7, a fan 6, and a light-emitting element 4. The outer cover 1 ′ also has a structural feature such as an opening 11 ′ and a housing 12 ′. The heat sink 7 also has a side wall 71 , a first end edge 711 , a second end edge 712 , a fixing portion 713 , a seat body 72 , Structural features such as the first surface 721, the second surface 722, the convex portion 723, the first connecting member 73, the first air flow passage 74, the second air flow passage 75, the second connecting member 76, and the outer ring portion 77.

Compared with the foregoing second embodiment, the third embodiment is further provided with at least one through hole 13 ′ in the outer cover 1 ′. In this embodiment, the outer cover 1 ′ is provided with a plurality of perforations 13 ′, therefore, the second When the airflow passage 75 is inhaled or exhausted, each of the perforations 13' can provide functions of assisting intake and exhaust to increase the amount of air in and out, and improve the heat dissipation performance, and can also reduce the noise generated by the spoiler. Moreover, the second end edge 712 of the side wall 71 of the third embodiment further forms an expanded state, so that the second end edge 712 has a slightly flared shape, which can improve the smoothness of air circulation.

As described above, when the outer cover of the present invention is embedded in the ceiling, the second ends of the first air flow passage and the second air flow passage are exposed on the ceiling surface, and can smoothly circulate with the outside air to improve the air circulation effect and heat dissipation. efficacy.

The air circulation effect and the heat dissipation performance of the invention are better, and the heat generated by the light-emitting element can be quickly eliminated, thereby prolonging the service life of the lamp.

The second end edge of the side wall of the present invention protrudes from the opening of the outer cover and the second surface along the axial direction thereof, and the second end of each of the first air flow channel and the second air flow channel has a height in the axial direction Poorly, the side wall can separate the first end of each of the first air flow channel and the second air flow channel to prevent the air sucked in and out from pushing each other to generate turbulence.

Moreover, the blocking portion of the fan can further guide the space in the first air flow channel and the second air flow channel to flow through each other through the air flow port of the fan, ensuring that the air circulates according to the fixed channel to avoid the occurrence of the turbulence.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

[this invention]

1. . . Cover

11. . . Opening

12. . . Room

1'. . . Cover

11’. . . Opening

12’. . . Room

13’. . . perforation

2. . . heat sink

twenty one. . . Side wall

211. . . First edge

212. . . Second end edge

213. . . Fixed part

twenty two. . . Seat

221. . . First surface

222. . . Second surface

223. . . Convex

twenty three. . . First connector

twenty four. . . First air channel

25. . . Second air channel

26. . . Second connector

27. . . Outer ring

3. . . fan

30a. . . Airflow port

30b. . . Airflow port

31. . . frame

32. . . Assembly department

4. . . Light-emitting element

41. . . Substrate

42. . . illuminator

5. . . ceiling

6. . . fan

60a. . . Airflow port

60b. . . Airflow port

61. . . frame

62. . . Assembly department

63. . . Barrier

7. . . heat sink

71. . . Side wall

711. . . First edge

712. . . Second end edge

713. . . Fixed part

72. . . Seat

721. . . First surface

722. . . Second surface

723. . . Convex

73. . . First connector

74. . . First air channel

75. . . Second air channel

76. . . Second connector

77. . . Outer ring

[知知]

81. . . Heat sink

811. . . Depression

812. . . Housing

813. . . Vents

82. . . Circuit board

83. . . Light-emitting diode

84‧‧‧ cooling fan

85‧‧‧ lamp holder

851‧‧‧wind guide hole

91‧‧‧Upper shell

911‧‧‧ accommodating space

912‧‧‧Ventinel

92‧‧‧ lower case

921‧‧‧through hole

93‧‧‧Heat components

931‧‧‧ cooling fan

94‧‧‧LED light group

Figure 1: A cross-sectional view of a combination of the first conventional structure.

Figure 2: A cross-sectional view of a combination of a second conventional structure.

Fig. 3 is an exploded perspective view showing the first embodiment of the present invention.

Figure 4: Top plan view of the heat sink of the present invention.

Fig. 5 is a sectional view showing the combination of the first embodiment of the present invention.

Figure 6 is a perspective exploded view of a second embodiment of the present invention.

Figure 7 is a sectional view showing the combination of the second embodiment of the present invention.

Figure 8 is a sectional view showing the combination of the third embodiment of the present invention.

1. . . Cover

11. . . Opening

12. . . Room

2. . . heat sink

twenty one. . . Side wall

211. . . First edge

212. . . Second end edge

213. . . Fixed part

twenty two. . . Seat

221. . . First surface

222. . . Second surface

223. . . Convex

twenty three. . . First connector

twenty four. . . First air channel

25. . . Second air channel

26. . . Second connector

27. . . Outer ring

3. . . fan

30a. . . Airflow port

30b. . . Airflow port

31. . . frame

32. . . Assembly department

4. . . Light-emitting element

41. . . Substrate

42. . . illuminator

Claims (22)

A lamp includes: an outer cover having an opening, and a cavity recessed by the opening; a heat sink disposed at the opening, the heat sink having a side wall, a body, a plurality of first connecting members, and a number a first air flow passage and a second air flow passage, the seat body being located in the side wall and having a gap with the inner peripheral wall of the side wall, the seat system being connected to the inner peripheral wall of the side wall by each of the first connecting members, The first air flow channel is formed between any two adjacent first connecting members at the gap, and the second air flow channel is formed between the outer peripheral wall of the side wall and the wall of the inner wall; a fan is located at the space The indoor air is disposed on one side of the heat sink, wherein the fan has two air flow ports, and each of the first air flow channel and the second air flow channel has two ends, and the first end of each of the first air flow channels is connected to one of the first ends. An air flow port, the first end of the second air flow channel is connected to the other air flow port, and the second end of each of the first air flow channel and the second air flow channel is facing the opening; and a light emitting component is disposed on the heat dissipation The other side of the device. The luminaire of claim 1, wherein each of the first airflow passage and the second airflow passage have a height difference in the axial direction. The luminaire of claim 1, wherein each of the first airflow passage and the second airflow passage are connected between the two sides of the heat sink. The luminaire according to the first, second or third aspect of the patent application, wherein the outer peripheral wall of the side wall is integrally extended with a plurality of second connecting members in a radial direction. According to the luminaire of item 4 of the patent application scope, wherein the second connecting piece An outer ring portion is coupled to the outer circumference, and the outer ring portion is coupled to the opening of the outer cover. The luminaire according to Item 5 of the patent application, wherein the outer ring portion is a continuous ring body or a discontinuous ring body composed of a plurality of joint members. The luminaire of claim 5, wherein the side wall has a first end edge and a second end edge, the first end edge is toward the chamber, and the second end edge is along the axis thereof The direction of the heart line protrudes from the outer ring portion. The luminaire of claim 1, wherein the seat has a first surface opposite to the first surface and a second surface, the first surface facing the chamber, the second surface facing away from Each of the first connecting members is a fin, and each of the first connecting members extends inwardly from the inner peripheral wall of the side wall and protrudes from the first surface. The luminaire of claim 7, wherein the pedestal has a first surface opposite to the first surface and a second surface, the first surface facing the chamber, the second surface facing away from the chamber, And the second end edge protrudes from the second surface along a direction of its axis. The luminaire according to item 8 of the patent application, wherein the illuminating element is disposed on the second surface by a substrate. The luminaire according to item 8 of the patent application, wherein the first surface is provided with a convex portion. The luminaire of claim 7, wherein the fan has a frame, and a peripheral portion of the frame is provided with a blocking portion, and a peripheral edge of the blocking portion covers the first end edge. According to the luminaire of claim 7, wherein the second end edge is formed in an expanded shape. The luminaire according to claim 1, 2 or 3, wherein the outer cover is provided with a perforation. The heat sink of the lamp has a side wall, a body, a plurality of first connecting members, a plurality of first air flow passages and a second connecting member, wherein the seat body is located in the side wall and the inner peripheral wall of the side wall Having a gap, the seat system is connected to the inner peripheral wall of the side wall by each of the first connecting members, and the first air flow passage is formed between any two adjacent first connecting members at the gap, the second connecting member It is attached to the outer peripheral wall of the side wall. The heat sink of the luminaire according to claim 15 , wherein the second connecting member has a radially disposed fin, and a second air flow passage is formed between any two adjacent fins. The heat sink of the lamp according to Item 16 of the patent application, wherein an outer ring portion is connected to each of the fins. The heat sink of the lamp according to claim 17, wherein the outer ring portion is a continuous ring body or a discontinuous ring body composed of a plurality of joint members. The heat sink of the lamp of claim 15, wherein the body has a first surface and a second surface, and each of the first connecting members is a fin. Each of the first connecting members extends inwardly from the inner peripheral wall of the side wall and protrudes from the first surface. A heat sink for a lamp according to claim 19, wherein the first surface is provided with a convex portion. The heat sink of the luminaire according to claim 19, wherein one end edge of the side wall faces the same direction as the second surface, and the end edge protrudes from the second surface along a direction of its axis. The heat sink of the luminaire according to claim 21, wherein the side wall protrudes from the end surface of the second surface to form an expanded shape.