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A steam generator includes a housing, a heating unit, an electrothermal unit and a one-way valve. The housing has a chamber and a water inlet. The heating unit includes a heating portion extending into the chamber. The heating portion has a first spiral channel thereon. One end of the heating portio

A steam generator includes a housing, a heating unit, an electrothermal unit and a one-way valve. The housing has a chamber and a water inlet. The heating unit includes a heating portion extending into the chamber. The heating portion has a first spiral channel thereon. One end of the heating portion is formed with a vaporization room and a steam outlet. The vaporization room has a second spiral channel therein to extend the time that the water and the wet steam pass through the heating unit so as to provide a complete heating and vaporizing function. Besides, by the one-way valve coupled to the water inlet, the steam generator of the present invention is simple in structure and cost-effective, providing an automatic water supply and re-heating function.

대표청구항 ▼

1. A steam generator, comprising: a housing, the housing comprising a chamber at one end thereof and a water inlet at one side thereof, the water inlet communicating with the chamber;a heating unit, the heating unit comprising an end cap and a heating portion, the end cap being to seal an open end o

1. A steam generator, comprising: a housing, the housing comprising a chamber at one end thereof and a water inlet at one side thereof, the water inlet communicating with the chamber;a heating unit, the heating unit comprising an end cap and a heating portion, the end cap being to seal an open end of the chamber of the housing, the heating portion extending into the chamber, the heating portion having a first spiral ring formed on an outer wall thereof, an outer circumferential portion of the first spiral ring being against an inner wall of the chamber to form a first spiral channel in the chamber, one end of the heating portion being formed with a vaporization room which communicates with the first spiral channel, the vaporization room having a steam outlet to communicate with outside;an electrothermal unit, the electrothermal unit being an electronic member capable of generating thermal energy after being electrified, the electrothermal unit being embedded in the heating portion of the heating unit; anda one-way valve, the one-way valve being connected to the water inlet of the housing,wherein the housing further has a water storing room which is located adjacent to the open end of the chamber and has a larger diameter than that of the chamber, the water inlet communicating with the water storing room. 2. The steam generator as claimed in claim 1, wherein the electrothermal unit is precast in the heating portion of the heating unit. 3. The steam generator as claimed in claim 1, wherein the one-way valve comprises a valve body which is located in the chamber and is against the water inlet. 4. The steam generator as claimed in claim 1, wherein the end cap is provided with a sealing ring. 5. A steam generator, comprising: a housing, the housing comprising a chamber at one end thereof and a water inlet at one side thereof, the water inlet communicating with the chamber;a heating unit, the heating unit comprising an end cap and a heating portion, the end cap being to seal an open end of the chamber of the housing, the heating portion extending into the chamber, the heating portion having a first spiral ring formed on an outer wall thereof, an outer circumferential portion of the first spiral ring being against an inner wall of the chamber to form a first spiral channel in the chamber, one end of the heating portion being formed with a vaporization room which communicates with the first spiral channel, the vaporization room having a steam outlet to communicate with outside;an electrothermal unit, the electrothermal unit being an electronic member capable of generating thermal energy after being electrified, the electrothermal unit being embedded in the heating portion of the heating unit;a one-way valve, the one-way valve being connected to the water inlet of the housing, and a spiral post in the vaporization room of the heating unit, the spiral post having a second spiral ring formed on an outer wall thereof, an outer circumferential portion of the second spiral ring being against an inner wall of the vaporization room to form a second spiral channel. 6. The steam generator as claimed in claim 5, wherein one end of the spiral post is provided with a cap which is located close to the vaporization outlet and has a diameter larger than that of the spiral post and that of the steam outlet, the cap having a hole to cover the steam outlet, but not sealing the steam outlet. 7. The steam generator as claimed in claim 5, wherein the housing further has a water storing room which is located adjacent to the open end of the chamber and has a larger diameter than that of the chamber, the water inlet communicating with the water storing room. 8. The steam generator as claimed in claim 5, wherein the electrothermal unit is precast in the heating portion of the heating unit. 9. The steam generator as claimed in claim 5, wherein the one-way valve comprises a valve body which is located in the chamber and is against the water inlet. 10. The steam generator as claimed in claim 5, wherein the end cap is provided with a sealing ring.