Direct-Heating Type Heater

Abstract

The present application discloses a direct-heating type heater that includes a direct-heating type heater shell, a heating device arranged inside the direct-heating type heater shell, and a direct-heating type heater component, wherein at least one segment of the heating device is installed with a metal elastic device, and the inner wall of the direct-heating type heater shell corresponding to the heating device with no metal elastic device installed is partially or wholly provided with a helical groove structure. Such a heater solves the problem of the prior art that the heat transfer efficiency is low due to the low heat dissipation capability of ceramics, and also solves the problem that water temperature is not even as water passes through the heater quickly and the water cannot be mixed fully and homogeneously.

What is claimed is: 
     
         1 . A heater for a fluid, the heater comprising:
 a heater shell;   a heating device arranged inside of the heater;   a helical groove structure around the heating device; and   an elastic device, wherein water flows around the elastic device to raise a temperature of the heating device,   wherein water is passed close to the heating device in a first direction then into the helical groove structure at a pitch around the heating device along a second direction,   wherein the first direction is opposite the second direction.   
     
     
         2 . The heater of  claim 1 , wherein the heating device provides a higher rate of heat transfer the fluid than the helical groove structure provides to the fluid. 
     
     
         3 . The heater of  claim 1 , wherein the elastic device is attached to a portion of the heating device. 
     
     
         4 . The heater of  claim 1 , wherein the elastic device is a spring. 
     
     
         5 . The heater of  claim 1 , wherein the elastic device is a wire. 
     
     
         6 . The heater of  claim 1 , wherein the elastic device extends less than a full length of the heating device. 
     
     
         7 . The heater of  claim 6 , wherein the elastic device extends approximately three-fourths of the full length of the heating device. 
     
     
         8 . The heater of  claim 1 , further comprising:
 a plurality of elastic devices, wherein water flows around the plurality of elastic devices to raise a temperature of the heating device.   
     
     
         9 . The heater of  claim 1 , wherein water flow enters the heater, the water is mixed first, then heated, and then mixed again, so as to achieve rapid heating homogeneously. 
     
     
         10 . A heater for a fluid, the heater comprising:
 a shell having an inner wall with a helical path in a portion thereof;   a water inlet disposed at a side of the shell;   a heating device disposed within the shell and including a pipe defining an internal passage fluidly having a first end connected to the water inlet and a second end opening to the helical path; and   an elastic device, wherein water flows around the elastic device to raise a temperature of the heating device,   wherein water is passed close to the heating device in a first direction then into the helical path at a pitch around the heating device along a second direction,   wherein the first direction is opposite the second direction.   
     
     
         11 . The heater of  claim 10 , wherein the heating device provides a higher rate of heat transfer the fluid than the portion with the helical path provides to the fluid. 
     
     
         12 . The heater of  claim 10 , wherein the elastic device is attached to a portion of the heating device. 
     
     
         13 . The heater of  claim 12 , wherein the elastic device is a spring. 
     
     
         14 . The heater of  claim 12 , wherein the elastic device is a wire. 
     
     
         15 . The heater of  claim 12 , wherein the elastic device extends less than a full length of the heating device. 
     
     
         16 . The heater of  claim 15 , wherein the elastic device extends approximately three-fourths of the full length of the heating device. 
     
     
         17 . The heater of  claim 10 , further comprising:
 a plurality of elastic devices, wherein water flows around the plurality of elastic devices to raise a temperature of the heating device.   
     
     
         18 . The heater of  claim 10 , wherein the water flow enters the heater, the water is mixed first, then heated, and then mixed again, so as to achieve rapid heating homogeneously.