Pressurizing water pump with control valve device

Abstract

A water pressurizing pump includes an accumulator, a control valve device, a valve device, a pressure switch, and a motor. When the piping system is open and a water pressure in the accumulator is above a value, water flows from the accumulator into the piping system. When the piping system is open and the water pressure in the accumulator is below the value, the motor is turned on to pump water to the piping system. Water could not enter the accumulator to maintain the water pressure in the accumulator in a stable low-pressure state. When the piping system is closed and the water pressure in the accumulator is below the value, the motor is turned on to pump water into the accumulator.

1 . A water pressurizing pump comprising: 
 an accumulator ( 12 );    a control valve device comprising a valve body ( 11 ) including a first side and a second side, the second side of the valve body comprising a compartment ( 113 ), a cap ( 16 ) being mounted in the compartment ( 113 ) and including a hole ( 161 ) through which water is output to a piping system to which the water pressurizing pump is connected, at least one channel ( 1131 ) being defined in an end of a circumferential wall delimiting the compartment ( 113 ) of the valve body ( 11 ) and in communication with the hole ( 161 ) of the cap ( 16 ), the valve body ( 11 ) further comprising a three-way channel ( 111 ) including a first port in communication with the accumulator ( 12 ), a second port, and a third port in communication with the compartment ( 13 );    a valve device ( 13 ) movably mounted in the compartment ( 113 ) of the valve body ( 11 ), the valve device comprising a hollow body ( 131 ) having an end wall ( 1315 ) and an open end, a movable block ( 132 ) mounted in the body ( 131 ), an elastic element ( 133 ) mounted in the body ( 131 ), and an end cap ( 134 ) for closing the open end of the body ( 131 ), the movable block ( 132 ) comprising a plurality of annularly spaced legs ( 1322 ), defining a plurality of passageways between the legs ( 1322 ), the end wall ( 1315 ) of the body ( 131 ) facing the end cap ( 16 ) and including a through-hole ( 1311 ) in communication with the channels ( 1131 ) of the valve body ( 11 ), the body ( 131 ) further including at least one outer water passageway ( 1312 ,  1313 ) in a circumference thereof, the end cap ( 134 ) including at least one hole ( 1342 ), the elastic element ( 133 ) being mounted between the end cap ( 134 ) and the movable block ( 135 );    a pressure switch ( 14 ) coupled to the first side of the valve body ( 11 ) and in communication with the second port of the three-way channel ( 111 ) of the valve body;    a motor ( 15 ) including an outlet, the outlet of the motor, the hole ( 161 ) of the cap ( 16 ), and the piping system being in communication with one another;    wherein when the piping system is open and a water pressure in the accumulator is above a first value, water flows from the accumulator ( 12 ) into the piping system via the three-way channel ( 111 ) and pushes the valve device ( 13 ) toward the cap ( 16 ), and the water enters the piping system via said at least one outer water passageway ( 1312 ,  1313 ) of the body ( 131 ) of the valve device ( 13 ), said at least one channel ( 1131 ) of the valve body ( 11 ) and the outlet ( 161 ) of the cap ( 16 );    wherein when the piping system is open and the water pressure in the accumulator is below the first value, the motor ( 15 ) is turned on to pump water to the piping system and the outlet ( 161 ) of the cap ( 16 ), the water flowing to the outlet ( 161 ) of the cap ( 16 ) enters said at least one channel ( 1131 ) of the valve body ( 11 ) and pushes the valve device ( 13 ) away from the cap ( 16 ), with the movable block ( 135 ) blocking the hole ( 1311 ) of the body ( 131 ) of the valve device ( 13 ), not allowing water to enter the accumulator ( 12 ), thereby maintaining the water pressure in the accumulator in a stable low-pressure state; and    wherein when the piping system is closed and the water pressure in the accumulator is below the first value, the motor ( 15 ) is turned on to pump water to the outlet ( 161 ) of the cap ( 16 ), the water flowing to the outlet ( 161 ) of the cap ( 16 ) enters said at least one channel ( 1131 ) of the valve body ( 11 ), pushes the valve device ( 13 ) away from the cap ( 16 ) and compresses the elastic element ( 133 ), moving the movable block ( 132 ) away from the end wall ( 1315 ) of the body ( 131 ) of the valve device ( 13 ), allowing water from the inlet ( 161 ) of the cap ( 16 ) to flow into the accumulator ( 12 ) via said at least one channel ( 1131 ) of the valve body ( 11 ), the through-hole ( 1311 ) of the end wall ( 1315 ) of the body ( 131 ), the passageways between the legs ( 1322 ) of the movable block ( 132 ), said at least one hole ( 1342 ) of the end cap ( 134 , and the three-way channel ( 111 ) until the water pressure in the accumulator ( 12 ) is greater than a second value.    
   
   
       2 . The water pressurizing pump as claimed in  claim 1  wherein the valve device ( 13 ) further comprises a muffling element ( 135 ) mounted between the movable block ( 132 ) and the end wall ( 1315 ) of the body ( 131 ) of the valve device ( 13 ).  
   
   
       3 . The water pressurizing pump as claimed in  claim 1  wherein the end wall ( 1315 ) of the body ( 131 ) of the valve device ( 13 ) further comprises at least one protrusion ( 1314 ) abutting against the cap ( 16 ) to provide a water-flowable gap between the body ( 131 ) of the valve device and the cap.  
   
   
       4 . The water pressurizing pump as claimed in  claim 1  wherein the valve device ( 13 ) further comprises a seal member ( 136 ) between the end cap ( 134 ) and an end wall delimiting the compartment ( 131 ) of the valve body ( 11 ), the seal member ( 136 ) including a hole through which water is flowable.  
   
   
       5 . The water pressurizing pump as claimed in  claim 1  wherein the accumulator ( 12 ) comprises a first housing ( 124 ) and a second housing ( 125 ) that together define a groove ( 123 ) therebetween, a membrane ( 12 ) being mounted in the accumulator ( 12 ) and separating the accumulator into an air chamber ( 127 ) and a water chamber ( 126 ), the membrane ( 121 ) comprising a base ( 128 ) including a circumferential wall ( 120 ) that is fittingly received in the groove ( 123 ), the membrane ( 12 ), the first housing ( 124 ), and the second housing ( 125 ) being fixed together by supersonic welding or screws to increase pressure-resisting capacity of the membrane ( 121 ) and the accumulator ( 12 ).  
   
   
       6 . The water pressurizing pump as claimed in  claim 1  wherein the cap ( 16 ) is made of plastic and fixed in the compartment ( 113 ) of the valve body ( 11 ) of the control valve device by supersonic welding.