Distilling apparatus

A distilling apparatus which includes a water chamber to receive cold water from an external water supply source, a heating chamber having an electric heater controlled to heat water to the boiling point, a guide pipe connected between the bottom side of the water chamber and the bottom end of the heat chamber to guide water from the water chamber to the heating chamber, a radiating coil pipe connected to a distilled water drain pipe outside the apparatus, and a steam pipe connected between the steam chamber and the radiating coil pipe and passing through the water chamber to guide steam from the heating chamber to the radiating coil pipe, permitting steam to be condensed into distilled water and heat to be absorbed by water in the water chamber.

BACKGROUND OF THE INVENTION 
The present invention relates to distilling apparatus, and relates more 
particularly to such a distilling apparatus which produces a heat 
exchanging process to pre-heat water before steam is condensed into 
distilled water. 
Various distilling apparatus have been disclosed for making distilled water 
for drinking, and have appeared on the market. These distilling apparatus 
commonly use an electric heater to heat water to the boiling point, and a 
condenser means to condense steam into distilled water. Because these 
distilling apparatus direct heats cold water to the boiling point, much 
electric is wasted, and it takes a long time to heat cold water to the 
boiling point. Furthermore, when steam is being condensed into distilled 
water, the heating efficiency is greatly reduced. 
SUMMARY OF THE INVENTION 
The present invention provides a distilling apparatus which eliminates the 
aforesaid drawbacks. It is one object of the present invention to provide 
a distilling apparatus which uses the heat of steam to warm up water so 
that water can be quickly heated to the boiling point. It is another 
object of the present invention to provide a distilling apparatus which 
allows the process of heating to heat water to the boiling point and the 
process of condensing to condense steam into distilled water to be 
simultaneously proceeded within the water chamber so that distilled water 
can be efficiently obtained.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIG. 1, the housing, referenced by 5, has a cylindrical shape. 
A water chamber 6 is made inside the housing 5 at a suitable elevation. A 
heating chamber 8 is suspended in the housing 5 and inserted through the 
center of the water chamber 6, having a top end disposed above the water 
chamber 6 and a bottom end disposed below the water chamber 6. A guide 
tube 12 is installed inside the housing 5 to guide water from the water 
chamber 6 to the heating chamber 8, having a top end connected to the 
bottom side of the water chamber 6 and a bottom end connected to the 
bottom end of the heating chamber 8. The heating chamber 8 has a sludge 
drain pipe 13 at the bottom for carrying off waste. A solenoid valve 7 is 
installed in the sludge drain pipe 13 to control its opening. A steam pipe 
2 is provided having a top end connected to the top end of the heating 
chamber 8 and a bottom end extending along the bottom side of the water 
chamber 6 and then connected to a radiating coil pipe 3. The radiating 
coil pipe 3 is mounted around the bottom end of the heating chamber 8, 
having one end connected to the steam pipe 2 and an opposite end connected 
to a distilled water drain pipe 11 outside of the housing 5 for output of 
distilled water. A water supply tube with a float valve 10 is connected to 
the water chamber 6 at one side at a suitable elevation for controlling 
the supply of water to the water chamber 6. An overflow pipe 9 is 
connected to the water chamber 6 at an opposite side at a higher elevation 
than the water supply tube with a float valve 10 for guiding excessive 
amount of water from the water chamber 6 out of the housing 5. A cooling 
fan 4 is installed in the top of the housing 5 and controlled to produce 
outward currents of air to carry heat from the radiating coil pipe 3 out 
of the housing 5. 
When in use, water is guided from the water chamber 6 to the heating 
chamber 8 by the guide tube 12 and then heated to the boiling point by the 
electric heater 1, permitting steam to pass through the steam pipe 2 to 
the radiating coil pipe 3. When steam passes through the Steam pipe 2, 
water in the water chamber 6 absorbs heat from the steam pipe 2, causing 
steam to be condensed into distilled water. When distilled water passes 
through the radiating coil pipe 3 to the distilled water drain pipe 11, 
its temperature is reduced further. The heat exchanging process between 
water in the water chamber 6 and steam in the steam pipe 2 pre-heats water 
in the water chamber 6 so that pre-heated water can be heated to the 
boiling point by the electric heater 1 quickly. Furthermore, the design of 
the overflow pipe 9 and the water supply pipe with a float valve 10 keeps 
the amount of water in the water chamber 6 to be maintained at a fixed 
level, i.e., a corresponding amount of fresh water is guided into the 
water chamber 6 when a certain amount of water is heated to the boiling 
point and changed into steam. 
While only one embodiment of the present invention has been shown and 
described, it will be understood that various modifications and changes 
could be made thereunto without departing from the spirit and scope of the 
invention disclosed.