# US 5,705,036 A · Water distilling apparatus

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- Number: US 5,705,036 A
- Document ID: US5705036A
- Status: Granted
- Kind: A
- Application number: 08/597,278
- Filed: 1996-02-06
- Granted: 1998-01-06
- Earliest claimed: 1996-02-06
- Inventors: Yueh-feng Wu; Mu-huo Chen
- Web page: https://patentgrep.com/patent/US5705036A

## CPC

- C02F 1/04: by distillation or evaporation
- B01D 3/42: Regulation; Control
- Y10S 203/08: Waste heat
- Y10S 203/19: Sidestream
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

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.

## Claims

### Claim 1

A water distilling apparatus comprising:
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, an outlet flue provided on the boiling tank for extending through the preheat tank to condense the steam into water and preheat water within the preheat tank and a first water level detection means with a first end vertically extending into the boiling tank, and electrically isolated from the casing of the boiling tank and a second end electrically connected to a positive potential;
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 electrically connected to the ground potential and coupled with the heat dissipation coil for storing the condensed water therefrom;
control means electrically connected to the first water level detection means, the fan, and said first heating means for disconnecting the fan and the heating means when a water level of the boiling tank is below the first water level detection means; and
a first faucet mounted on the cool water tank for dispensing the water from the cool water tank;
an inlet valve secured on the inlet of the preheat tank for controlling water from the water source;
a second water level detection means vertically extending into the boiling tank, having a length shorter than the first water level detection means, and electrically connected with said control means for generating a signal to the control means to activate the valve when the water level of the boiling tank is below the second water level detection means; and
a third water level detection means vertically extending into the boiling tank and having a length shorter than the second water level detection means and electrically connected with said control means for generating a signal to the control means to deactivate the valve when the water level of the boiling tank reaches the third water level detection means.

### Claim 2 (depends on 1)

The water distilling apparatus according to claim 1 further comprising:
a thermostat mounted on the inlet valve and electrically connected to said control means for deactivating the valve when a temperature of the inlet valve exceeds a predetermined temperature set on the thermostat.

### Claim 3 (depends on 1)

The water distilling apparatus according to claim 1 further comprising:
a fourth water level detection means immersed within the cool water tank and electrically connected with said control means for generating a signal to said control means to activate the first heating means when a water level of the cool water tank is below the fourth water level detection means;
a fifth water level detection means vertically extending into the cool water tank, having a length shorter than the fourth water level detection means, and electrically connected with said control means for generating a signal to the control means to deactivate the first heating means when the water level of the cool water tank reaches the fifth water level detection means.

### Claim 4 (depends on 1)

The water distilling apparatus according to claim 1 further comprising:
a hot water tank electrically connected to the ground potential;
a pipe connected between the hot water tank and the cool water tank;
a pump mounted on the pipe for pumping the water within the cool water tank into the hot water tank;
a second heating means electrically connected to said control means and immersed within the hot water tank for boiling the water therewithin;
a sixth water level detection means vertically extending into the cool water tank and electrically connected with said control means for generating a signal to the control means to deactivate the pump when a water level of cool water tank is below the sixth water level detection means;
a seventh water level detection means vertically extending into the cool water tank with a length shorter than the sixth water level detection means and electrically connected with said control means for generating a signal to the control means to activate the pump when the water level of the cool water tank reaches the seventh water level detection means;
an eighth water level detection means vertically extending into the hot water tank and electrically connected to said control means for generating a signal to said control means to activate the pump when a water level of the hot water tank is below the eighth water level detection means;
a ninth water level detection means vertically extending into the hot water tank with a length shorter than the eighth water level detection means and electrically connected with said control means for generating a signal to said control means to deactivate the pump when the water level of the hot water tank reaches the ninth water level detection means; and
a second faucet mounted on the hot water tank for dispensing the water from the hot water tank.

### Claim 5 (depends on 4)

The water distilling apparatus according to claim 4 further comprising:
a tenth water level detection means having a length greater than the eighth water level detection means and electrically connected to said control means for generating a signal to the control means to deactivate the second heating means when the water level of the hot water tank is below the tenth water level detection means.

### Claim 6 (depends on 5)

The water distilling apparatus according to claim 5 further comprising:
a thermostat connected between the tenth water level detection means and the control means for controlling a water temperature within the hot water tank.

### Claim 7 (depends on 1)

The water distilling apparatus according to claim 1 wherein each of said water level detection means is formed of a titanium electrode and a glass tube for receiving the electrode.

### Claim 8 (depends on 7)

The water distilling apparatus according to claim 7 wherein each of said electrodes is screw-shaped and has a head portion and a threaded end.

### Claim 9 (depends on 8)

The water distilling apparatus according to claim 8 further comprising:
a fastener secured on each glass tube for mounting the water level detection means onto a corresponding tank;
a seal provided on each of said water level detection means for sealing the glass tube and the electrode; and
a nut threadably engaged with a corresponding threaded end of each electrode for biasing the seal onto the glass tube and adjusting a length thereof within the corresponding tank.

### Claim 10 (depends on 1)

The water distilling apparatus according to claim 1 further comprising a longitudinal plate of U-shaped cross-section vertically secured within the boiling tank and defining a longitudinal opening enclosing the first, the second, and the third water level detection means and a length longer than the first water level detection means for sheltering the first, the second, and the third water level detection means.