Referring to
An air supplier 60 has a plurality of supply pipes 61 extending therefrom and the supply pipes 61 connected to the inlets 112 via connectors 62 engaged with the inlets 112.
An output pipe 30 is connected to the rear frame 12 and a high pressure tank 40 is connected to the output pipe 30. The first pipe 50 has one end connected with the nozzles 75 of the tub 70 and the other end of the first pipe is connected with the high pressure tank 40.
Each of the first pipe 50 and the second pipe 20 has a control valve 51/21 connected thereto so as to close or open the first and second pipe 50, 20 when needed. The high pressure tank 40 includes a pressure releasing valve 52 and the first pipe 50 has a gauge 53 for displaying temperature and pressure of water.
When the centrifugal pump 10 is activated, water is supplied into the centrifugal pump 10 via the second pipe 20, and pressurized air is introduced into the centrifugal pump 10 via the supply pipes 61 and the inlets 112. The centrifugal force mix the water and the high pressurized air to generate fine bubbles. The water with fine bubbles is then sent into the high pressure tank 40 via the output pipe 30 to maintain the bubbles in the water. The water then is sent to the nozzles 75 via the first pipe 50 and ejected into the hot tub 70. The water in the hot tub 70 is recycled via the drain valve 71 and the second pipe 20 back to the centrifugal pump 10.
A water pressure regulation unit 80 is connected to the front frame 11 of the centrifugal pump 10 and includes the water tank 81, a one-direction valve 82 to prevent the water from flowing back to the water tank 81, an electro-magnetic valve 83 for controlling the water pressure regulation unit 80, and a volume valve 84 connected on a pipe connected between the water tank 81 and the front frame 11. A low pressure controller 85 and a high pressure controller 86 are connected to the high pressure tank 40, wherein the lower pressure controller 85 is able to activate the water tank 81 to supply water into the centrifugal pump 10 when the pressure in the high pressure tank 40 is low, and the high pressure controller 86 stops the centrifugal pump 10 when the pressure in the high pressure tank 40 is high.
Referring to
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.