Water distilling apparatus

A water distilling apparatus includes a preheat tank having an inlet and an outlet for storing water from a water source via the inlet, a boiling tank formed of a conductive casing connected to a ground potential and having an inlet in connection with the outlet of the preheat tank, a heater located within the boiling tank to boil water thereby generating steam, and an outlet flue extending from the boiling tank through the preheat tank as to condense the steam and preheat the water within the preheat tank, a heat dissipation coil connected with the outlet flue out of the preheat tank, a fan blowing air against the heat dissipation coil, a cool water tank connected with the heat dissipation coil for storing condensed water therefrom, an electrode vertically extending into the boiling tank, electrically isolated from the case of the boiling tank and connected to a positive voltage source, a control circuit electrically connected to each of the electrode, the fan, and the heater for disconnecting the fan and the heater when a water level of the boiling tank is below the electrode, and a faucet for dispensing the water from the cool water tank.

BACKGROUND OF THE INVENTION 
The present invention relates to a water distilling apparatus, and 
particularly to a water distilling apparatus which generates OH.sup.- 
ions in the distilled water. 
There are many water processing apparatuses, such as purifying apparatuses, 
distilling apparatuses, etc., for purifying and boiling water, however, 
these apparatuses do not have a positive help to the health of humans. 
Thus, an advantage of the present invention is to provide distilled water 
with OH.sup.- which is beneficial to human health. 
SUMMARY OF THE INVENTION 
An object of the present invention is to provide a distilling water 
apparatus which provides OH.sup.- within the distilled water. 
According to the present invention, a water distilling apparatus includes a 
preheat tank having an inlet and an outlet for storing water from a water 
source via the inlet, a boiling tank formed of a conductive casing 
connected to a ground potential and having an inlet in connection with the 
outlet of the preheat tank, a first heating means located within the 
bottom of the boiling tank to boil water and generate steam, and an outlet 
flue provided on the boiling tank for extending through the preheat tank 
as to condense the steam and preheat the water within the preheat tank, a 
heat dissipation coil connected with the outlet flue out of the preheat 
tank, a fan blowing air against the heat dissipation coil, a cool water 
tank connected with the heat dissipation coil for storing condensed water 
therefrom, a first electrode vertically extending into the boiling tank 
and electrically isolated from the case of the boiling tank and connected 
to a positive potential, control means electrically connected to the first 
electrode, the fan, and said heating means for disconnecting the fan and 
the heating means when a water level of the boiling tank is below the 
first electrode, and a faucet for dispensing the water from the cool water 
tank. 
Other objects, advantages, and novel features of the invention will become 
more apparent from the following detailed description when taken in 
conjunction with the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Referring to FIG. 1, there is shown a perspective view of a water 
distilling apparatus 100 in accordance with the present invention. As 
shown in the drawing, the water distilling apparatus 100 includes a cool 
water tank 10 for storing cooled water, a cool water faucet 12 mounted on 
a front wall of the cool water tank 10, a water processing body 20, a 
plurality of columns 14 protruding from the cool water tank 10 for 
supporting the water processing body 20, a power switch 22 provided on a 
front wall 21 of the water processing body 20, a vent plate 24 provided on 
the water processing body 20 for exhausting the heat generated therefrom, 
a plurality of indicating lamps 26 provided on the front wall 21 thereof, 
a hot water faucet 28 mounted on the front wall 21 of the water processing 
body 20, and a water supply pipe 30 for supplying water into the water 
processing body 20. 
As shown in FIG. 2, the water distilling apparatus 100 further includes a 
preheat tank 40, a boiling tank 50, an inlet valve 32, a helical heat 
dissipation coil 60, a cooling fan 62, and a hot water tank 70. 
Referring to FIG. 3, water is firstly supplied via the inlet valve 32 into 
the preheat tank 40 for preheating, the preheated water is then conveyed 
into the boiling tank 50 via a pipe 51 for boiling the preheated water by 
a plurality of heaters 52, 52' and generating steam, the steam generated 
in the boiling tank 50 is then conveyed into the preheat tank 40 via a 
cooling pipe 42 immersed within the preheat tank 40 for heating the water 
within the preheat tank 40 and condensing steam from the boiling tank 50 
into water. The condensed water then flows into the cool water tank 10 via 
the heat dissipation coil 60, which are cooled by the cooling fan 62 
controlled by a control circuit as mentioned later. An orifice 64 is 
defined in the uppermost portion of the heat dissipation coil 60 for 
dispensing chemical contaminants, such as chlorine etc. 
A pump 16 is provided under a bottom of the cool water tank 10 for pumping 
water to the hot water tank 70 via a pipe 18. A heater 72 controlled by 
the control circuit later mentioned is provided within the hot water tank 
70 for heating the distilled water to a desired temperature preset by a 
thermostat 74. 
The boiling tank 50 has three titanium electrodes Y0, Y1, and Y2, the cool 
water tank 10 has four titanium electrodes Y3, Y4, Y5, and Y6, and the hot 
water tank 70 has three titanium electrodes Y7, Y8, and Y9 respectively in 
cooperation with the control circuit later-mentioned for detecting the 
water level of a corresponding tank and controlling the water supply valve 
32 and the pump 16 via the control circuit in response to the detected 
water level. Further, each of the titanium electrodes serves as a positive 
electrode and a housing of corresponding tanks serves as a negative 
electrode so that when a suitable power is applied to the electrodes, an 
electrolysis is performed to the water within the corresponding tank as to 
acquire distilled water with OH.sup.-. Further, as the tank is connected 
to a negative electric source, a cathodic protection is formed therein. 
A detailed structure of a titanium electrode and a tank is shown in FIG. 5, 
the titanium electrode is formed in the shape of a screw 102 with a head 
104 and a threaded end 106. The electrode is firstly inserted into a glass 
tube 120 and the threaded end 106 thereof is sequentially engaged with a 
silicone rubber seal 108 and a nut 110. Secondly, the head of the 
assembled electrode is inserted into a corresponding tank via a silicone 
rubber fastener 112. Finally, a tip 114 of the threaded end 106 of the 
titanium electrode is electrically connected to a conductive connector 116 
coupled to a positive potential for performing the functions of water 
level measuring and electrolysis. In this arrangement, the electrode and 
the corresponding tank are electrically isolated by the glass tube 120 and 
the silicone rubber fastener 112. 
Referring back to FIG. 3, the boiling tank 50 additionally has a drain 56 
for expelling water out of the tank 50 when a user intends to clean inner 
walls of the tank 50. A longitudinal plate 58 of U-shaped cross-section is 
vertically secured on a wall of the boiling tank 50 and defines a 
longitudinal opening 59 enclosing the electrodes Y0, Y1, and Y2 and a 
length longer than that of any electrodes Y0, Y1, and Y2 for sheltering 
the titanium electrodes Y0, Y1, and Y2 within the boiling tank 50 from 
being exposed to a plurality of bubbles (not shown) generated as the water 
boils so that an incorrect water level detection is avoided. 
As shown in FIG. 4, the inlet valve 32 is further provided with a 
bimetallic thermostat 34 for protecting an electric coil (not shown) 
within the valve 32 from burning out when there is no water flowing from 
the water supply pipe 30 through the valve 32. The thermostat 34 is 
composed of a reed 341 in contact with a plunger 321 of the valve 32 and 
two normally-closed contacts 36, 38, when the reed 341 detects an abnormal 
temperature from the plunger 321 of the valve 32 resulting from water not 
passing through the valve 32, the 8 contacts 36, 38 will trip. This will 
cause a control circuit (shown in FIG. 6) to electrically disconnect the 
electric coil within the valve 32 to protect the electric coil from 
burning out. 
FIG. 6 illustrates a control circuit of the present invention. The control 
circuit is composed of a water supply circuit CK1, a boiling circuit CK2, 
a pump control circuit CK3, and a hot water control circuit CK4. 
The water supply circuit CK1 is composed of a thermostat 34, a silicon 
controlled rectifier (SCR) T1, a transistor Q1 connected between an anode 
and a gate of the SCR T1, and a solid state relay (SSR1) as to control a 
valve 32 and a lamp 24 connected at an output end of the SSR1. The water 
supply circuit CK1 also has two SCRs T2, T3, two transistors Q2, Q3 
respectively connected between an anode and a gate of a corresponding SCR 
T2, T3, a diode D1 connected between a low level electrode Y0 and the 
transistor Q2, a diode D2 connected between a high level electrode Y1 and 
the transistor Q3, and an SCR T4 having a gate connected to the anode of 
the SCR T2. The electrodes Y0 and Y1 are immersed within a boiling tank 50 
connected to a ground as mentioned. When a water level of the boiling tank 
50 is below the low level electrode Y0, i.e., the low level electrode Y0 
is in a high potential, the transistor Q2 and the SCR T2 are in an "off" 
status so that the SCR T4 is in an "on" status, then SSR1 will be 
activated, the valve 32 will be opened. When the water level of the 
boiling tank 50 reaches the high water level electrode Y1, the transistor 
Q3 and the SCR T3 will be in an "on" status, the SSR1 will be in an "off" 
status so that the valve 32 will be closed. Additionally, if the 
normally-closed contacts 36, 38 of the thermostat 34 are activated, the 
transistor Q1 and SCR T1 will also be turned off so that the valve 32 will 
also be closed. 
The boiling circuit CK2 has a similar arrangement to that of the water 
supply circuit CK1 Except that the boiling circuit CK2 has an SSR2 which 
is used for controlling a beater 52, a cooling fan 62, and a lamp 24' and 
comprises a long electrode Y2 immersed within the boiling tank 50, a 
transistor Q5 and an SCR TS for disabling the SSR2 when the water level of 
the boiling tank 50 is below the long electrode Y2 thereby turning off the 
heater 52 and the fan 62. Similarly, a low level electrode Y3 and a high 
level electrode Y4 are immersed within the cool water tank 10 and operate 
in a similar function to that of the high level and low level electrodes 
Y0, Y1 of the water supply circuit CK1. 
The pump control circuit CK3 has a similar arrangement to the boiling 
circuit CK2 except that an SSR3 is used to control a pump 16 and a lamp 
24" and comprising an SCR T6, a transistor Q6, and a pumping indicating 
electrode Y6. The pump control circuit CK3 also has a low water level 
electrode Y7 and a high water level electrode Y8 immersed within the hot 
water tank 70. When a water level of the hot water tank 70 is below the 
low water level electrode Y7 and a water level of the cool water tank 10 
rises to the pumping indicating electrode Y6, the pump 16 will be 
activated. If the water level of the cool water tank 10 is below a long 
electrode Y5 immersed therewithin, the pump 16 will be turned off. 
The hot water control circuit CK4 only uses a set of SCR T7, a transistor 
Q7, a diode D3, a thermostat 74, a long electrode Y9, and an SSR4 in a 
similar circuit arrangement to the water supply circuit CK1. When a water 
level of the hot water tank 70 is below the long electrode Y9, a heater 72 
within the hot water tank 70 will be turned off. When a water temperature 
of the water within the hot water tank is below a preset temperature, the 
heater 72 will be activated to heat the water to a desired temperature. 
Note that this heating procedure is only activated when the water level of 
the hot water tank 70 reaches the long electrode Y9. 
Although the invention has been explained in relation to its preferred 
embodiment, it is to be understood that many other possible modifications 
and variations can be made without departing from the spirit and scope of 
the invention as hereinafter claimed.