Heating device and system comprising the heating device

Abstract

A heating device comprises an inner tank, an outer shell, and a heater. The inner tank is received in the outer shell. An inner tank opening and an inner tank inlet are each in communication with an inner tank chamber. An outer shell opening corresponds in position to the inner tank opening. An outer shell inlet and the outer shell opening are each in communication with an outer shell chamber. An outer shell through-hole corresponds in position to an inner tank outlet. One end of an electrical heating tube of the heater is disposed at a fixing portion and electrically connected to a control circuit. The other end of the electrical heating tube is received in the inner tank chamber. The control circuit includes an electric wire for communicating with the outside. A guide channel is formed between the inner tank and the outer shell.

What is claimed is: 
     
         1 . A heating device, comprising:
 an inner tank, an outer shell and a heater, with the inner tank received in the outer shell,   wherein the inner tank includes an inner tank chamber, an inner tank opening, an inner tank inlet and an inner tank outlet, with the inner tank opening being in communication with the inner tank chamber, the inner tank inlet being in communication with the inner tank chamber, and the inner tank outlet being in communication with the inner tank chamber,   wherein the outer shell includes an outer shell chamber, an outer shell opening, an outer shell inlet and an outer shell through-hole, with the outer shell opening corresponding in position to the inner tank opening and being in communication with the outer shell chamber, wherein the outer shell inlet is in communication with the outer shell chamber and admits an external water, wherein the outer shell through-hole corresponds in position to the inner tank outlet, thereby allowing the inner tank outlet to be in communication with an outside of the outer shell,   wherein the heater includes a fixing portion, a control circuit and an electrical heating tube, wherein an end of the electrical heating tube is disposed at the fixing portion and electrically connected to the control circuit, wherein another end of the electrical heating tube is received in the inner tank chamber, with the fixing portion abutting against and covering the inner tank opening, wherein the control circuit includes an electric wire for communicating with an outside,   wherein a guide channel is formed between an outer wall of the inner tank and an inner wall of the outer shell, with the outer shell inlet being in communication with the guide channel, and the inner tank inlet being in communication with the guide channel.   
     
     
         2 . The heating device of  claim 1 , wherein the guide channel further comprises a guide vane disposed at the outer shell inlet and extending spirally toward the inner tank inlet. 
     
     
         3 . The heating device of  claim 2 , wherein the guide vane is disposed on an outer wall of the inner tank. 
     
     
         4 . The heating device of  claim 2 , wherein the guide vane is disposed on an inner wall of the outer shell. 
     
     
         5 . The heating device of  claim 1 , wherein a ratio of a capacity of the inner tank chamber to a capacity of the guide channel ranges from 1:1 to 1:15. 
     
     
         6 . The heating device of  claim 2 , wherein a ratio of a capacity of the inner tank chamber to a capacity of the guide channel ranges from 1:1 to 1:15. 
     
     
         7 . The heating device of  claim 3 , wherein a ratio of a capacity of the inner tank chamber to a capacity of the guide channel ranges from 1:1 to 1:15. 
     
     
         8 . The heating device of  claim 4 , wherein a ratio of a capacity of the inner tank chamber to a capacity of the guide channel ranges from 1:1 to 1:15. 
     
     
         9 . The heating device of  claim 1 , wherein a ratio of a diameter of the inner tank chamber to a diameter of the outer shell chamber ranges from 1:1.1 to 1:4. 
     
     
         10 . The heating device of  claim 2 , wherein a ratio of a diameter of the inner tank chamber to a diameter of the outer shell chamber ranges from 1:1.1 to 1:4. 
     
     
         11 . The heating device of  claim 3 , wherein a ratio of a diameter of the inner tank chamber to a diameter of the outer shell chamber ranges from 1:1.1 to 1:4. 
     
     
         12 . The heating device of  claim 4 , wherein a ratio of a diameter of the inner tank chamber to a diameter of the outer shell chamber ranges from 1:1.1 to 1:4. 
     
     
         13 . A heating system, comprising:
 the heating device of  claim 1 ; and   a control unit including an electrical control module and a regulating valve, with the electrical control module electrically connected to the regulating valve, wherein an end of the regulating valve is in tubular communication with the outer shell inlet, and another end of the regulating valve is in communication with an external water, wherein a control circuit of the heater is electrically connected to the electrical control module,   wherein the electrical control module controls the electrical heating tube such that the regulating valve regulates a flow rate of water admitted into the outer shell, thereby allowing the electrical heating tube to heat up the water to a predetermined temperature.   
     
     
         14 . A heating system, comprising:
 the heating device of  claim 2 ; and   a control unit including an electrical control module and a regulating valve, with the electrical control module electrically connected to the regulating valve, wherein an end of the regulating valve is in tubular communication with the outer shell inlet, and another end of the regulating valve is in communication with an external water, wherein a control circuit of the heater is electrically connected to the electrical control module,   wherein the electrical control module controls the electrical heating tube such that the regulating valve regulates a flow rate of water admitted into the outer shell, thereby allowing the electrical heating tube to heat up the water to a predetermined temperature.   
     
     
         15 . A heating system, comprising:
 the heating device of  claim 3 ; and   a control unit including an electrical control module and a regulating valve, with the electrical control module electrically connected to the regulating valve, wherein an end of the regulating valve is in tubular communication with the outer shell inlet, and another end of the regulating valve is in communication with an external water, wherein a control circuit of the heater is electrically connected to the electrical control module,   wherein the electrical control module controls the electrical heating tube such that the regulating valve regulates a flow rate of water admitted into the outer shell, thereby allowing the electrical heating tube to heat up the water to a predetermined temperature.   
     
     
         16 . A heating system, comprising:
 the heating device of  claim 4 ; and   a control unit including an electrical control module and a regulating valve, with the electrical control module electrically connected to the regulating valve, wherein an end of the regulating valve is in tubular communication with the outer shell inlet, and another end of the regulating valve is in communication with an external water, wherein a control circuit of the heater is electrically connected to the electrical control module,   wherein the electrical control module controls the electrical heating tube such that the regulating valve regulates a flow rate of water admitted into the outer shell, thereby allowing the electrical heating tube to heat up the water to a predetermined temperature.   
     
     
         17 . A heating system, comprising:
 the heating device of  claim 5 ; and   a control unit including an electrical control module and a regulating valve, with the electrical control module electrically connected to the regulating valve, wherein an end of the regulating valve is in tubular communication with the outer shell inlet, and another end of the regulating valve is in communication with an external water, wherein a control circuit of the heater is electrically connected to the electrical control module,   wherein the electrical control module controls the electrical heating tube such that the regulating valve regulates a flow rate of water admitted into the outer shell, thereby allowing the electrical heating tube to heat up the water to a predetermined temperature.   
     
     
         18 . A heating system, comprising:
 the heating device of  claim 9 ; and   a control unit including an electrical control module and a regulating valve, with the electrical control module electrically connected to the regulating valve, wherein an end of the regulating valve is in tubular communication with the outer shell inlet, and another end of the regulating valve is in communication with an external water, wherein a control circuit of the heater is electrically connected to the electrical control module,   wherein the electrical control module controls the electrical heating tube such that the regulating valve regulates a flow rate of water admitted into the outer shell, thereby allowing the electrical heating tube to heat up the water to a predetermined temperature.