Patent ID: 7874810

Claim:
A water pressurizing pump comprising: a water tank ( 1 ) including a compartment ( 11 ) for receiving water; a pump ( 12 ) mounted in the compartment ( 11 ) for pressurizing and outputting water in the compartment ( 11 ) of the water tank ( 1 ); a cover ( 2 ) mounted on top of the water tank ( 1 ) to seal the compartment ( 11 ) of the water tank ( 1 ), with the cover ( 2 ) including a space ( 2 a ) in communication with the compartment ( 11 ) of the water tank ( 1 ), with the cover ( 2 ) further including a first channel ( 22 ) having a first end in communication with the space ( 2 a ) of the cover ( 2 ) and a second end adapted to be coupled with a water supply coupler ( 21 ), with the cover ( 2 ) further including a second channel ( 23 ) having a first end in communication with the first channel ( 22 ) and a second end, and with pressurized water being outputable through the first channel ( 22 ) to the water supply coupler ( 21 ); a pressure tank ( 3 ) mounted to and in communication with the second end of the second channel ( 23 ) of the cover ( 2 ), a differential pressure valve unit ( 6 ) slidably mounted in the second channel, the differential pressure valve unit ( 6 ) being movable by a pressure of pressurized water in the second channel ( 23 ) higher than a first pressure value to allow water from the second channel ( 23 ) to enter the pressure tank ( 3 ); a pressure switch ( 4 ) mounted on and in communication with the pressure tank ( 3 ) for detecting water pressure in the pressure tank ( 3 ), with the pump ( 12 ) being turned off when the water pressure in the pressure tank ( 3 ) is higher than a second pressure value that is lower than the first pressure value, and with the pump ( 12 ) being activated when the water pressure in the pressure tank ( 3 ) is lower than a third pressure value that is lower than the second pressure value; wherein the cover ( 2 ) further includes a partitioning wall ( 26 ) that separates the space ( 2 a ) into a first chamber ( 24 ) and a second chamber ( 27 ), with the first chamber ( 24 ) being in communication with the first channel ( 22 ) and the second chamber ( 27 ) being in communication with the compartment ( 11 ) of the water tank ( 1 ); further comprising, in combination: a check valve ( 5 ) mounted in the first chamber ( 24 ) and coupled with a water output end of the pump ( 12 ), the check valve ( 5 ) allowing pressurized water from the pump ( 12 ) to enter the first channel ( 22 ) and preventing flow of pressurized water in a reverse direction; and an air discharge valve ( 25 ) mounted in the second chamber ( 27 ) for discharging air in the compartment ( 11 ) of the water tank ( 1 ) when filling water into the compartment ( 11 ) of the water tank ( 1 ).