Coilable solar water heater

Abstract

A coilable solar water heater includes a heat collecting plate and a soft pipe. The heat collecting plate includes two heat collecting layers, capillary tissues, two protecting layers and a soft support body. The heat collecting layers are stacked with each other and form a plurality of passages at intervals between the heat collecting layers. Each passage is provided for passing the capillary tissues. Each protecting layer is stacked on an external surface of each heat collecting layer. The soft support body is attached onto an external surface of a protecting layer. Each soft pipe has a plurality of through holes, each being connected to a passage of the corresponding heat collecting layer. The solar water heater can be coiled and folded to reduce its volume significantly and facilitate its transportation or moving.

1 . A coilable solar water heater, comprising:
 a heat collecting plate, including:   two heat collecting layers, stacked with each other, and forming a plurality of passages at an interval between the two heat collecting layers;   a plurality of capillary tissues, each being passed into the passage of each heat collecting layer;   two protecting layers, stacked on an external surface of each corresponding heat collecting layer; and   a soft support body, attached onto an external surface of a protecting layer; and   a pair of soft pipes, each having a plurality of through holes penetrating the interior of the soft pipe, and the through hole being connected to the corresponding passage of each heat collecting layer.   
   
   
       2 . The coilable solar water heater as recited in  claim 1 , wherein the heat collecting layer is made of aluminum foil. 
   
   
       3 . The coilable solar water heater as recited in  claim 1 , wherein the capillary tissue is a metal woven mesh. 
   
   
       4 . The coilable solar water heater as recited in  claim 1 , wherein the capillary tissue is a porous structure formed by sintering a metal powder. 
   
   
       5 . The coilable solar water heater as recited in  claim 1 , wherein the protecting layer is made of a transparent plastic material. 
   
   
       6 . The coilable solar water heater as recited in  claim 1 , wherein the soft support body is attached onto of an external surface of the protecting layer at the bottom. 
   
   
       7 . The coilable solar water heater as recited in  claim 6 , wherein the soft support body is made of canvas, plastic cloth or rubber cloth. 
   
   
       8 . The coilable solar water heater as recited in  claim 1 , further comprising a hard pipe, passed and connected into a soft pipe, and having a plurality of connecting holes disposed on a lateral side of the hard pipe and penetrating through the hard pipe, and the connecting holes being aligned with the corresponding through holes of the soft pipe. 
   
   
       9 . The coilable solar water heater as recited in  claim 1 , further comprising two hard pipes, passed and connected into each soft pipe, and having a plurality of connecting holes disposed on a lateral side of the hard pipe and penetrating through the hard pipe, and the connecting holes being aligned with the corresponding through holes of the soft pipe. 
   
   
       10 . The coilable solar water heater as recited in  claim 9 , further comprising a fixture composed of two front L-shape plates, two rear L-shape plates, a plurality of nuts and a plurality of O-rings, and the hard pipe having an external thread disposed on both sides of the hard pipe and passing out of the soft pipe, and each O-ring being sheathed onto each soft pipe and each hard pipe, and front and rear L-shape plates being sheathed onto both front and rear ends of each hard pipe respectively, and each nut being screwed to the external thread of each hard pipe.