Flat heat pipe

Abstract

An exemplary flat heat pipe includes a cover, a wick structure adhered to part of an inner surface of the cover and working medium contained in the wick structure. The cover defines a receiving chamber therein. The wick structure is received in the receiving chamber and includes an interface surface away from the inner surface of the cover. The interface of the wick structure and the exposed inner surface of the cover cooperatively define a vapor passage therebetween. Vaporized working medium enters the vapor passage only from the interface

What is claimed is: 
     
         1 . A flat heat pipe comprising:
 a hollow cover defining a receiving chamber therein;   a wick structure received in the receiving chamber and adhered to a part of an inner surface of the cover, the wick structure comprising an interface surface away from the inner surface of the cover; and   working medium contained in the wick structure;   wherein the interface of the wick structure and the exposed inner surface of the cover cooperatively define a vapor passage therebetween, and vaporized working medium enters the vapor passage only from the interface.   
     
     
         2 . The flat heat pipe as in  claim 1 , wherein a volume of the wick structure is equal to a cubage of the vapor passage. 
     
     
         3 . The flat heat pipe as in  claim 1 , wherein the cover comprises an elongated front plate, an elongated rear plate spaced from and facing the front plate and two connecting plates interconnecting lateral edges of the front plate and the rear plate, inner surfaces of the front plate, rear plate, and connecting plate cooperatively define the receiving chamber therebetween, and opposite ends of the front plate and the rear plate are pressed toward each other and sealed to form a first end and a second end. 
     
     
         4 . The flat heat pipe as in  claim 3 , wherein one end of the wick structure is adhered to an inner surface of the first end, and the wick structure slantwise extends towards the second end along a longitudinal direction of the cover from the end thereof. 
     
     
         5 . The flat heat pipe as in  claim 4 , wherein a volume of the wick structure decreases from the end adhered to the first end to the other end away from the end adhered to the first end. 
     
     
         6 . The flat heat pipe as in  claim 5 , wherein the wick structure comprises a lateral surface adhered to and overspreads the inner surface of the first end, two side surfaces extending from opposite edges of the lateral surface and adhered to part of the inner surfaces of the front plate and the rear plate, a connecting surface extending from an edge of the lateral surface and adhered to whole of the inner surface of one of the connecting plates along the longitudinal direction of the cover, and the interface extending from another edge of the lateral surface and connecting ends of the side surfaces away from the connecting surface, the interface, the inner surface of the other connecting plate away from the wick structure, and the exposed inner surfaces of the front plate and the rear plates cooperatively define the vapor passage therebetween. 
     
     
         7 . The flat heat pipe as in  claim 6 , wherein the interface, the connecting surface, and the side surfaces intersect an edge of the second end. 
     
     
         8 . The flat heat pipe as in  claim 5 , wherein the wick structure comprises a lateral surface adhered to and overspreads the inner surface of the first end, a first connecting surface and a second connecting surface extending from top and bottom edges of the lateral surface and respectively adhered to part of the inner surfaces of the connecting plates, and two side surfaces extending two edges of the lateral surface and adhered to part of the inner surfaces of the front plate and the rear plate, the interface connecting the side surfaces, the first connecting surface and the second connecting surface, and the interface, the exposed inner surfaces of the connecting plates, the front plate and the rear plate cooperatively define the vapor passage therebetween. 
     
     
         9 . The flat heat pipe as in  claim 8 , wherein the interface, the side surfaces, the first connecting surface and the second connecting surface intersect a line away from the inner surface of the second end. 
     
     
         10 . The flat heat pipe as in  claim 8 , wherein the second connecting surface is longer than the first connecting surface along the longitudinal direction of the cover. 
     
     
         11 . The flat heat pipe as in  claim 3 , wherein the wick structure is adhered to and overspreads the inner surfaces of one of the connecting plates and the front plate, slantwise extends from the first end to the second end along the longitudinal direction of the cover, and spaced from the other connecting plate and the rear plate, the interface of the wick structure is formed at a bottom end of the wick structure oriented towards the other connecting plate and the rear plate, and the interface, the inner surfaces of the other connecting plate and the rear plate cooperatively define the vapor passage therebetween 
     
     
         12 . The flat heat pipe as in  claim 3 , wherein the wick structure is adhered to and overspreads the inner surface of one of the connecting plates, evenly extends towards the other connecting plate along a transverse direction of the cover, and evenly extends from the first end to the second end along a longitudinal direction of the cover. 
     
     
         13 . The flat heat pipe as in  claim 12 , wherein the wick structure fills a half of the receiving chamber, the interface surface is formed on an end of the wick structure and faces the other connecting plate, the interface and the exposed inner surfaces of the front plate and rear plate cooperatively define the vapor passage therebetween. 
     
     
         14 . The flat heat pipe as in  claim 3 , wherein the wick structure is arranged on a central of the cover along a longitudinal direction of the cover to divide the receiving chamber into three parts, and two vapor passages are defined between the inner surfaces of the connecting plates and opposite sides of the wick structure. 
     
     
         15 . The flat heat pipe as in  claim 14 , wherein the wick structure extends from the first end to the second end of the cover and side surfaces thereof are respectively adhered to central portions of the front plate and the rear plate.