Solid state lights with thermosiphon liquid cooling structures and methods
First Claim
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1. A lighting device, comprising:
- a housing including a fluid chamber having a plurality if channel loops;
a coolant fluid in the fluid chamber;
solid state emitters (SSEs) each including an active portion from which light is emitted and a back portion, wherein at least one of the active portion and the back portion directly contacts the coolant fluid in one of the channel loop; and
a reflective structure positioned between the SSEs, wherein the reflective structure is configured to direct light emitted by each of the SSEs out of the lighting device while the coolant fluid in each of the channel loops is heated by the least one of the active portion and the back portion to circulate the coolant fluid along the respective channel loops.
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Abstract
A solid state lighting (SSL) device with a solid state emitter (SSE) being partially exposed in a channel loop, and methods of making and using such SSLs. The SSE can have thermally conductive projections such as fins, posts, or other structures configured to transfer heat into a fluid medium, such as a liquid coolant in the channel loop. The channel loop can include an upward channel in which the SSE is exposed to warm the coolant in the upward channel, and a downward channel through which coolant moves after being cooled by a cooling structure. The coolant in the channel loop can naturally circulate due to the heat from the SSE.
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Citations
23 Claims
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1. A lighting device, comprising:
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a housing including a fluid chamber having a plurality if channel loops; a coolant fluid in the fluid chamber; solid state emitters (SSEs) each including an active portion from which light is emitted and a back portion, wherein at least one of the active portion and the back portion directly contacts the coolant fluid in one of the channel loop; and a reflective structure positioned between the SSEs, wherein the reflective structure is configured to direct light emitted by each of the SSEs out of the lighting device while the coolant fluid in each of the channel loops is heated by the least one of the active portion and the back portion to circulate the coolant fluid along the respective channel loops. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A lighting device, comprising:
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a housing having a fluid chamber holding a coolant fluid, the fluid chamber including a main chamber and a plurality of channel loops, the individual channel loops having an inlet positioned to receive the coolant fluid from the fluid chamber and an outlet positioned to output the coolant fluid to the main chamber; a cooling structure configured to transfer thermal energy from the coolant fluid in the fluid chamber, the cooling structure including at least one heat transfer fin positioned in the fluid chamber to directly contact the coolant fluid; a reflective structure; and solid state emitters (SSEs) configured to emit light toward the reflective structure such that the reflective structure directs the emitted light out of the lighting device, wherein each of the SSEs is coupled to the housing such that heat generated by the SSEs is transferred to the coolant fluid in one of the channel loops and causes the coolant fluid to flow along the channel loops. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A lighting device, comprising:
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a housing including a fluid chamber holding a coolant fluid, the fluid chamber having a plurality of channel loops through which the coolant fluid is capable of independently flowing; a reflective structure within the housing; and a plurality of solid state emitters (SSEs) within housing, wherein the SSEs are configured to emit light toward the reflective structure, wherein each of the SSEs is positioned along one of the channel loops such that heat is transferred from the SSE to the coolant fluid to cause thermosiphoning by circulating the coolant fluid through the one of the channel loops while the reflective structure directs light from the SSEs out of the lighting device. - View Dependent Claims (20, 21, 22, 23)
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Specification