GB2500576A - Heat dissipating device for lamps - Google Patents

Heat dissipating device for lamps Download PDF

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Publication number
GB2500576A
GB2500576A GB1205103.3A GB201205103A GB2500576A GB 2500576 A GB2500576 A GB 2500576A GB 201205103 A GB201205103 A GB 201205103A GB 2500576 A GB2500576 A GB 2500576A
Authority
GB
United Kingdom
Prior art keywords
heat dissipating
opening
vent
lamps
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1205103.3A
Other versions
GB201205103D0 (en
Inventor
Chao-Chuan Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB1205103.3A priority Critical patent/GB2500576A/en
Publication of GB201205103D0 publication Critical patent/GB201205103D0/en
Publication of GB2500576A publication Critical patent/GB2500576A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/506—Cooling arrangements characterised by the adaptation for cooling of specific components of globes, bowls or cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A heat dissipating device for lamps includes a heat dissipating cover 1 whose top has a first opening 11. The bottom of the heat dissipating cover 1 has a second opening 12. The diameter of the first opening 11 is smaller than the second opening 12. An annular recess 121 with a base is formed between the first opening 11 and second opening 12. A light source 3 which may be a LED is assembled to the base of the annular recess 121. A glass shade 2 covers the light source 3. Heat from the light source 3 is quickly dissipated due to the heat dissipating cover 1 and the glass shade 2 both having high thermal conductivity.

Description

HEAT DISSIPATING DEVICE FOR LAMPS
1. Field of the Invention
The present invention relates to a heat dissipating device, more particularly to a heat dissipating device for lamps.
2. Description of Related Art
With the development of high efficiency and high power LEDs, it has become possible to use LEDs in lighting and illumination. Replacement light bulbs have been made, as well as dedicated fixtures and LED lamps. LEDs are used as street lights and in other architectural lighting where color changing is used. However, light emitting efficiency of the LED lamp is easily affected by heat, particularly under high power of the electric current for a long time, the color performance becomes unstable. In addition, most of the electrical elements are damaged easily in the high temperature environment. How to design an efficient heat sink for the LED lamp becomes an important issue in this field.
The conventional heat dissipating devices are using several thermal conducting fins (5) which are placed around a transparent portion (6) of the lamp.
The thermal conducting fins (5) are radially aligned on the lamp, such that the heat can be conducted to the thermal conducting fins (5) and dissipated into the air. The thermal conducting fins (5) provide a lot of contacting area between the lamp and the air, and each of thermal conducting fins (5) is made from materials with high thermal conductivity, such as copper, aluminum, and aluminum-alloys.
Thus, the heat is dissipated into the air quickly via the thermal conducting fins (5).
The thermal conducting fins (5) can be further bent for increasing contacting area between the lamp and the air.
Unfortunately, the cost of the copper, aluminum, and aluminum-alloys becomes so expensive day after day that the thermal conducting fins (5) become more expensive to be manufactured. In addition, each of the thermal conducting fins (5) has its own thickness, such that the amount of the thermal conducting fins (5) and thickness does not allow the contacting area to increase infinitely on the lamp. Finally, to produce one bending thermal conducting fin (5) with rigid structure is not easy on the assembly line. The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional.
The main objective of the present invention is to provide an improved heat dissipating device for lamps.
To achieve the objective, a heat dissipating device for lamps comprises a heat dissipating cover, the top side of the heat dissipating cover having a first opening defined thereon, the bottom side of the heat dissipating cover having a second opening defined thereon, the diameter of the first opening smaller than the diameter of the second opening, an annular recess with a base formed between the first opening and second opening, a light source assembled to the base of the annular recess, a glass shade assembled to the second opening, the glass shade covering the light source; thereby the heat from the light source is dissipated into the air quickly because of the heat dissipating cover and the glass shade both with high thermal conductivity; the heat is not influenced on the light source for a long term use.
The heat dissipating cover comprises at least one first vent and at least one second vent defined on the peripheral of the heat dissipating cover, the first vent close to the first opening, the second vent close to the second opening.
The heat dissipating cover comprises at least one first vent or at least one second vent defined on the peripheral of the heat dissipating covet The base of the annular recess has at least one third vent defined thereon.
The third vent is near the light source.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
In the drawings: Fig. 1 is an exploded view of a heat dissipating device for lamps in accordance with the present invention; Fig. 2 is a cross-sectional view of the heat dissipating device for lamps in accordance with the present invention; Fig. 3 is a perspective view of the heat dissipating device for lamps with a power member; Fig. 4 is an exploded view of a heat dissipating device for lamps with two first, second, and third vents; Fig. 5 is an exploded view of a heat dissipating device for lamps with eight first, second, and third vents; Fig. 6 is a cross-sectional view of Fig. 4; and
Fig. 7 is a perspective view of the prior art.
Referring to Figs. 1-3, a heat dissipating device for lamps in accordance with the present invention comprises a heat dissipating cover (1) and a glass shade (2). The heat dissipating cover (1) is made from materials with high thermal conductivity, such as copper, aluminum, and aluminum-alloys. The shape of the heat dissipating cover (1) is much similar to flowerpots. The top side of the heat dissipating cover (1) has a first opening (11) defined thereon.
The bottom side of the heat dissipating cover (1) has a second opening (12) defined thereon. The diameter of the first opening (11) is smaller than the diameter of the second opening (12). An annular recess (121) with a base is formed between the first opening (11) and second opening (12). A light source (3) is assembled to the base ofthe annular recess (121).
The glass shade (2) is assembled to the second opening (12). The glass shade (2) is made from transparent materials with high thermal conductivity, such as glass. The glass shade (2) covers the light source (3). The light source (3) is a light emitting diode. The light beams from the light source (3) are emitting out of the glass shade (2) for illuminating outsides. A power member (4) is assembled to the first opening (II). The light source (3) is electrically connected to the power member (4).
Under this arrangement, the heat from the light source (3) is dissipated into the air quickly because of the heat dissipating cover (1) and the glass shade (2) both with high thermal conductivity. The heat is not influenced on the light source (3) for a long term use.
Referring to Figs 1-2, the heat dissipating cover (1) fttrther comprises at least one first vent (13) and at least one second vent (14) defined on the peripheral of the heat dissipating cover (1). The first vent (13) is close to the first opening (11). The second vent (14) is close to the second opening (12). The first vent (13) and the second vent (14) are vertically aligned on the peripheral of the heat dissipating cover (1). In addition, the base of the annular recess (121) has at least one third vent (122) defined thereon. The third vent (122) is near the light source (3). According to the location of first vent (13), second vent (14), and the third vent (122), the heat air from the light source (3) is upwardly flowing into the third vent (122) and dissipating into the air via first vent (13), and the cool air from outsides are flowing into the heat dissipating cover (1) and glass shade (2) via second vent (14) to finish the thermal convection.
Referring to Fig. 4, the heat dissipating cover (1) comprises two first vents (13), two second vents (14), and two third vents (122) for the thermal convection.
Referring to Fig. 5, the heat dissipating cover (1) comprises eight first vents (13), eight second vents (14), and eight third vents (122) for the thermal convection.
Thus, the heat from the light source (3) is not only transmitted into the air by the thermal conduction via the heat dissipating cover (1) and the glass shade (2), but also transmitted into the air by the thermal convection via the first vent (13), the second vent (14), and the third vent (122).
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.

Claims (7)

  1. Claim(s) I. A heat dissipating device for lamps comprising: a heat dissipating cover (1), the top side of the heat dissipating cover (1) having a first opening (II) defined thereon, the bottom side of the heat dissipating cover (1) having a second opening (12) defined thereon, the diameter of the first opening (11) smaller than the diameter of the second opening (12), an annular recess (121) with a base formed between the first opening (II) and second opening (12), a light source (3) assembled to the base of the annular recess (121); a glass shade (2) assembled to the second opening (12), the glass shade (2) covering the light source (3); and thereby the heat from the light source (3) is dissipated into the air quickly because of the heat dissipating cover (1) and the glass shade (2) both with high thermal conductivity; the heat is not influenced on the light source (3) for a long term use.
  2. 2. The heat dissipating device for lamps as claimed in claim 1, wherein the heat dissipating cover (1) comprises at least one first vent (13) and at least one second vent (14) defined on the peripheral of the heat dissipating cover (1), the first vent (13) close to the first opening (11), the second vent (14) close to the second opening (12).
  3. 3. The heat dissipating device for lamps as claimed in claim 1, wherein the heat dissipating cover (1) comprises at least one first vent (13) or at least one second vent (14) defined on the peripheral of the heat dissipating cover (1).
  4. 4. The heat dissipating device for lamps as claimed in claim 1, wherein the base of the annular recess (121) has at least one third vent (122) defined thereon.
  5. 5. The heat dissipating device for lamps as claimed in claim 1, wherein the third vent (122) is near the light source (3).
  6. 6. The heat dissipating device for lamps as claimed in claim 1, wherein the heat dissipating cover (I) comprises multiple first vents (13) and multiple second vents (14) defined on the peripheral of the heat dissipating cover (1), the first vents (13) close to the first opening (11), the second vents (14) close to the second opening (12), the base of the annular recess (121) having multiple third vents (122) defined thereon and near the light source (3).
  7. 7. A heat dissipating device for lamps substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB1205103.3A 2012-03-23 2012-03-23 Heat dissipating device for lamps Withdrawn GB2500576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1205103.3A GB2500576A (en) 2012-03-23 2012-03-23 Heat dissipating device for lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1205103.3A GB2500576A (en) 2012-03-23 2012-03-23 Heat dissipating device for lamps

Publications (2)

Publication Number Publication Date
GB201205103D0 GB201205103D0 (en) 2012-05-09
GB2500576A true GB2500576A (en) 2013-10-02

Family

ID=46086978

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1205103.3A Withdrawn GB2500576A (en) 2012-03-23 2012-03-23 Heat dissipating device for lamps

Country Status (1)

Country Link
GB (1) GB2500576A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100002453A1 (en) * 2008-07-04 2010-01-07 Hsiang-Chen Wu Illuminating device and annular heat-dissipating structure thereof
US20100165632A1 (en) * 2008-12-26 2010-07-01 Everlight Electronics Co., Ltd. Heat dissipation device and luminaire comprising the same
US20110164420A1 (en) * 2010-01-07 2011-07-07 Hung-Wen Lee Diffusion structure for illumination light source

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100002453A1 (en) * 2008-07-04 2010-01-07 Hsiang-Chen Wu Illuminating device and annular heat-dissipating structure thereof
US20100165632A1 (en) * 2008-12-26 2010-07-01 Everlight Electronics Co., Ltd. Heat dissipation device and luminaire comprising the same
US20110164420A1 (en) * 2010-01-07 2011-07-07 Hung-Wen Lee Diffusion structure for illumination light source

Also Published As

Publication number Publication date
GB201205103D0 (en) 2012-05-09

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)