Ptc heater for liquid heating

Abstract

A PTC (Positive Temperature Coefficient) heater for liquid heating may include: a heat conductor; a PTC heating assembly; and water pipe assembly. The heat conductor may have a first accommodating duct and a second accommodating duct. The PTC heating assembly at least partially is disposed in the first accommodating duct; moreover, the water pipe assembly at least partially is disposed in the second accommodating duct, with an outer surface of the water pipe assembly at least partially abutting against an inner surface of the second accommodating duct. The PTC liquid heating tube of the present disclosure can achieve a better corrosion resistance and greatly extend the service life of the PTC heater as well as prevent electric leakage accidents. Furthermore, the PTC heater of the present disclosure will have a simple structure and low costs for being convenient to assemble, especially in the replacement of the water pipes for maintaining the PTC heater in future.

What is claimed is: 
     
         1 . A PTC heater for liquid heating, comprising:
 a heat conductor comprising at least one first accommodating duct and at least one second accommodating duct;   a PTC heating assembly at least partially disposed in the first accommodating duct; and   at least one water pipe assembly at least partially disposed in the second accommodating duct, with an outer surface of the water pipe assembly at least partially abutting against an inner surface of the second accommodating duct.   
     
     
         2 . The PTC heater for liquid heating of  claim 1 , wherein the first and second accommodating ducts are disposed in parallel. 
     
     
         3 . The PTC heater for liquid heating of  claim 1 , wherein the first accommodating duct is disposed between at least two second accommodating ducts. 
     
     
         4 . The PTC heater for liquid heating of  claim 1 , wherein the heat conductor is a material of an aluminum alloy. 
     
     
         5 . The PTC heater for liquid heating of  claim 1 , wherein the water pipe assembly is a material of a corrosion-resistant heat-conducting material. 
     
     
         6 . The PTC heater for liquid heating of  claim 1 , wherein the water pipe assembly is a material of one of stainless steel, stainless iron and copper. 
     
     
         7 . The PTC heater for liquid heating of  claim 6 , wherein the water pipe assembly comprises at least one water inlet pipe and at least one water outlet pipe, at least one of ends of the water inlet pipe extends out of the second accommodating duct and at least one of ends of the water outlet pipe extends out of the second accommodating duct. 
     
     
         8 . The PTC heater for liquid heating of  claim 7 , further comprising a water inlet portion, the water inlet portion comprising a water inlet duct, the water inlet portion being connected to a first end of the water inlet pipe, and the water inlet duct being in communication with the water inlet pipe. 
     
     
         9 . The PTC heater for liquid heating of  claim 8 , wherein the first end of the water inlet pipe is disposed inside the water inlet duct of the water inlet portion. 
     
     
         10 . The PTC heater for liquid heating of  claim 8 , wherein the water inlet portion is connected to a first end of the heat conductor. 
     
     
         11 . The PTC heater for liquid heating of  claim 9 , wherein a seal is disposed between an outer surface of the first end of the water inlet pipe and an inner surface of the water inlet duct of the water inlet portion. 
     
     
         12 . The PTC heater for liquid heating of  claim 10 , wherein a seal is disposed between an end face of the water inlet portion and an end face of the first end of the heat conductor. 
     
     
         13 . The PTC heater for liquid heating of  claim 8 , further comprising a water outlet portion, the water outlet portion comprising a water outlet duct, the water outlet portion being connected to a first end of the water outlet pipe, and the water outlet duct of the water outlet portion being in fluid communication with the water outlet pipe. 
     
     
         14 . The PTC heater for liquid heating of  claim 13 , wherein the first end of the water outlet pipe is disposed inside the water outlet duct of the water outlet portion. 
     
     
         15 . The PTC heater for liquid heating of  claim 13 , wherein the water outlet portion is connected to a first end of the heat conductor. 
     
     
         16 . The PTC heater for liquid heating of  claim 14 , wherein a seal is disposed between an outer surface of the first end of the water outlet pipe and an inner surface of the water outlet duct of the water outlet portion. 
     
     
         17 . The PTC heater for liquid heating of  claim 15 , wherein a seal is disposed between an end face of the water outlet portion and an end face of the first end of the heat conductor. 
     
     
         18 . The PTC heater for liquid heating of  claim 10 , further comprising a connecting portion, the connecting portion comprising a water flow duct, the connecting portion being connected to a second end of the water inlet pipe and a second end of the water outlet pipe respectively, the water flow duct being in fluid communication with the water inlet pipe and the water outlet duct. 
     
     
         19 . The PTC heater for liquid heating of  claim 18 , wherein the connecting portion is connected to a second end of the heat conductor, the second end of the water inlet pipe and the second end of the water outlet pipe being disposed inside the water flow duct of the connecting portion. 
     
     
         20 . The PTC heater for liquid heating of  claim 18 , wherein the connecting portion is connected to the second end of the heat conductor. 
     
     
         21 . The PTC heater for liquid heating of  claim 19 , wherein a seal is disposed between an outer surface of the second end of the water inlet pipe and an inner surface of the water flow duct of the connecting portion, and a seal is disposed between the second end of the water outlet pipe and an inner surface of the water flow duct of the connecting portion. 
     
     
         22 . The PTC heater for liquid heating of  claim 20 , wherein a seal is disposed between an end face of the connecting portion and an end face of the heat conductor. 
     
     
         23 . The PTC heater for liquid heating of  claim 1 , wherein the water pipe assembly comprises at least one U-shaped water pipe at least partially disposed in the second accommodating duct. 
     
     
         24 . The PTC heater for liquid heating of  claim 23 , further comprising a water inlet portion, the water inlet portion comprising a water inlet duct, the water inlet portion being connected to a first end of the U-shaped water pipe, the water inlet portion being in fluid communication with the U-shaped water pipe. 
     
     
         25 . The PTC heater for liquid heating of  claim 24 , wherein the first end of the U-shaped water pipe is disposed inside the water inlet duct of the water inlet portion. 
     
     
         26 . The PTC heater for liquid heating of  claim 24 , wherein the water inlet portion is connected to a first end of the heat conductor. 
     
     
         27 . The PTC heater for liquid heating of  claim 25 , wherein a seal is disposed between an outer surface of the first end of the U-shaped water pipe and an inner surface of the water inlet duct of the water inlet portion. 
     
     
         28 . The PTC heater for liquid heating of  claim 26 , wherein a seal is disposed between an end face of the water inlet portion and an end face of the first end of the heat conductor. 
     
     
         29 . The PTC heater for liquid heating of  claim 18 , further comprising a water outlet portion, the water outlet portion comprising a water outlet duct, the water outlet portion being connected to a second end of the U-shaped water pipe, the water outlet duct of the water outlet portion being in fluid communication with the U-shaped water pipe. 
     
     
         30 . The PTC heater for liquid heating of  claim 29 , wherein the second end of the U-shaped water pipe is disposed inside the water outlet duct of the water outlet portion. 
     
     
         31 . The PTC heater for liquid heating of  claim 29 , wherein the water outlet portion is connected to a first end of the heat conductor. 
     
     
         32 . The PTC heater for liquid heating of  claim 30 , wherein a seal is disposed between an outer surface of the second end of the U-shaped water pipe and an inner surface of the water outlet duct of the water outlet portion. 
     
     
         33 . The PTC heater for liquid heating of  claim 31 , wherein a seal is disposed between an end face of the water outlet portion and an end face of the first end of the heat conductor. 
     
     
         34 . The PTC heater for liquid heating of  claim 1 , wherein the heat conductor is an integrally formed component, the integrally formed component being a one-piece metal alloy shell. 
     
     
         35 . The PTC heater for liquid heating of  claim 1 , wherein the heat conductor comprises:
 a first component the first component comprising the first accommodating duct and a first groove disposed on an outer surface of the first component; and   a second component detachably connected to the first component, the second component comprising a second groove, the second groove corresponding to the first groove,   wherein the first component is connected to the second component, the second groove is in combination with the first groove to be configured to the second accommodating duct, and the water pipe assembly is disposed in the second accommodating ducts   
     
     
         36 . The PTC heater for liquid heating of  claim 35 , wherein the first groove and second groove are profiled grooves and the water pipe assembly comprises a profiled water pipe being fastened to the second accommodating duct.