Heating pipe

Abstract

A heating pipe includes a guide pipe, a connector and an outer pipe. A connector is disposed at one end of the guide pipe. The outer pipe surrounds the guide pipe and is positioned apart from the guide pipe. The heating pipe further includes two sealed elements positioned apart from each other and between the guide pipe and the outer pipe. The guide pipe, the outer pipe and the two sealed elements define a sealed room. A heating module is disposed in the sealed room.

1 . A heating pipe comprising:
 a guiding pipe;   an outer pipe surrounding the guiding pipe and apart from the guiding pipe;   a connector disposed at one end of the guiding pipe and extending beyond the outer pipe;   two sealed elements apart from each other and sealed between an outer surface of the guiding pipe and an inner surface of the outer pipe, wherein the guiding pipe, the outer pipe, and the two sealed elements cooperatively define a sealed room; and   a heating module positioned in the sealed room.   
     
     
         2 . The heating pipe of  claim 1 , wherein the connector is an end portion of the guiding pipe  100  extending beyond the outer pipe, and an inner diameter of the connector is substantially the same as an inner diameter of the guiding pipe. 
     
     
         3 . The heating pipe of  claim 1 , wherein the connector is a separate pipe connected with the guiding pipe. 
     
     
         4 . The heating pipe of  claim 1 , wherein the sealed room is in a vacuum-like state. 
     
     
         5 . The heating pipe of  claim 1 , further comprising a heat-reflective layer located between the heating module and the outer pipe. 
     
     
         6 . The heating pipe of  claim 5 , wherein the heat-reflective layer is located on the inner surface of the outer pipe. 
     
     
         7 . The heating pipe of  claim 6 , wherein the heating module is positioned on the outer surface of the guiding pipe and apart from the heat-reflective layer. 
     
     
         8 . The heating pipe of  claim 5 , wherein the heat-reflective layer is made of insulative material and positioned on a surface of the heating module. 
     
     
         9 . The heating pipe of  claim 1 , wherein the heating module comprises a heating element, a first electrode, and a second electrode, the first electrode and the second electrode being electrically connected with the heating element. 
     
     
         10 . The heating pipe of  claim 9 , wherein the heating element comprises a freestanding carbon nanotube structure comprising a plurality of carbon nanotubes joined by Van der Waals attractive force. 
     
     
         11 . The heating pipe of  claim 10 , wherein the carbon nanotube structure comprises at least one carbon nanotube film wrapping the outer surface of the guiding pipe. 
     
     
         12 . The heating pipe of  claim 11 , wherein the at least one carbon nanotube film comprises a plurality of carbon nanotubes joined end-to-end with each other and oriented in a substantially same direction. 
     
     
         13 . The heating pipe of  claim 12 , wherein the first electrode and the second electrode each have a wire structure and are substantially parallel with an axial direction of the guiding pipe, and the carbon nanotubes in the carbon nanotube film are oriented from the first electrode to the second electrode. 
     
     
         14 . The heating pipe of  claim 12 , wherein the first electrode and the second electrode each have a ring structure and are wound around two opposite ends of the guiding pipe; the carbon nanotubes in the carbon nanotube film are oriented from the first electrode to the second electrode. 
     
     
         15 . The heating pipe of  claim 9 , wherein the carbon nanotube structure comprises at least one linear carbon nanotube structure disposed on the outer surface of the guiding pipe. 
     
     
         16 . A heating pipe comprising:
 a guiding pipe;   an outer pipe surrounding the guiding pipe and apart from the guiding pipe;   a connector disposed at one end of the guiding pipe and extending beyond the outer pipe for connecting another pipe and allowing a passage of fluid;   two sealed elements apart from each other and located between the guiding pipe and the outer pipe, wherein a sealed room is cooperatively defined by the guiding pipe, the outer pipe and the two sealed elements; and   a heating module disposed in the sealed room, the heating module comprising a heating element comprising a carbon nanotube structure positioned on an outer surface of the guiding pipe.   
     
     
         17 . The heating pipe of  claim 16 , wherein a heat capacity per unit area of the carbon nanotube structure is less than 2×10 −4  J/m 2 *K. 
     
     
         18 . The heating pipe of  claim 16 , wherein the carbon nanotube structure comprises one linear carbon nanotube structure twisted around the outer surface of the guiding pipe. 
     
     
         19 . The heating pipe of  claim 16 , wherein the carbon nanotube structure comprises a plurality of linear carbon nanotube structures disposed side by side and substantially parallel with each other on an outer surface of guiding pipe. 
     
     
         20 . The heating pipe of  claim 16 , wherein the carbon nanotube structure comprises a plurality of linear carbon nanotube structures knitted to obtain a net structure disposed on an outer surface of the guiding pipe.