A water chilling system includes a reservoir having an inlet and an outlet and a cooling device, such as a thermoelectric cooling probe, situated to cool water contained in the reservoir. A baffle is situated adjacent the inlet to direct water entering the reservoir to a predetermined area of the reservoir such the warmer water entering the reservoir does not immediately mix with the chilled water near the cooling probe.

A water bicycle has a body and a drive system connected to the body. The body is made from a material that allows the body to float on water. The drive system includes a propeller that is positioned below the body, a shaft having a first end coupled to the propeller, a drive mechanism coupled to the second end of the shaft, and a control coupled to the drive mechanism. The water bicycle can also include a steering system operatively connected to the body, the steering system having a rudder, a h...

The water pump comprises: a body, a rotating device, a driving device, an upper cover and a bottom cover. A lower contacting element is mounted below a bearing, and is capable of contacting a bottom end of a shaft. The upper cover has an upper contacting element being capable of contacting a top end of the shaft. When the rotating device rotates, the top end of the shaft touches the upper contacting element in one-point way to avoid the problem of rubbing the blades of the rotating device and th...

The water trampoline includes a generally doughnut-shaped inflatable tube having an open center area. A mesh rebound member extends over the open center area and is secured around its entire periphery to the tube on the upper surface of the tube member. The attaching/securing elements include a plurality of side-by-side loop elements which extend toward the open center area of the tube from the upper surface thereof and a plurality of side-by-side loop elements which extend from the periphery of...

A method of treating water to remove fluoride ions from the water, thereby to reduce the dissolved fluoride content of the water, is provided. The method includes, in a contacting step, contacting water containing dissolved fluoride ions with alumina, to cause the fluoride ions to react with and become bound to the alumina. In a regenerating step, the alumina, when spent, is regenerated to drive off fluoride ions bound thereto. The regenerated alumina is recycled to the contacting step where it ...

A water chiller includes a cooling tank and a cooling device positioned at an upper portion of the cooling tank. The cooling device includes a cooling probe positioned within the cooling tank at an upper region thereof and being operable to cool the water at the upper region of the cooling tank. The cooled water increases in density and descends toward the bottom or lower region of the cooling tank, while warmer water positioned in the lower region rises upwards toward the cooling probe, where i...

A secondary heat exchanger B for recovering latent heat from combustion gas includes water tubes 5 each of which is so inclined that a first end 50a is positioned lower than a second end 50b. Therefore, in draining water from each of the water tubes 5, water can be caused to flow smoothly into a water-inflow and hot-water-outflow header 6A connected to the first ends 50a. The secondary heat exchanger B includes a casing 7 which includes an upper wall 70a and a bottom wall 70b which are so inclin...

An apparatus to extract water from ambient air. The apparatus includes a dehumidifier, a holding tank, and one or more dispensing tanks in which water is maintained hot or cold. Provision is made to recycle water in the holding tank through an aerator to prevent stagnation of stored water. Water from the holding tank is pumped through a filter system before entering the dispensing tanks. A safety control is provided to prevent overflowing a collection pump reservoir in event of interruption in n...

A water cleaner comprises: a filtering canister having a plurality of filtering holes formed through the canister and made of oxidation-reduction alloy for filtering off chlorine and other hazardous materials contained in the water when passing through the filtering holes formed through the canister; and a functional water-treatment material filled in the canister for killing bacteria or fungi, for removing pollutants, and for removing odor in the water for cleaning water in a water tank or rese...

A water dispenser in a refrigerator door can include a filter casing in the door opening into the bottom of the dispenser housing. The filter casing can include a top wall positioned in the bottom of the dispenser housing, a head assembly at the bottom of the filter casing connected to the water supply and to a water outlet in the dispenser, and can include a filter casing drain. A filter cartridge in the filter casing can connect to the head assembly. The filter casing can include a filter reta...