Pump apparatus

Abstract

A pump apparatus which can save space and is easy to handle is proposed. The pump apparatus includes a pipe-shaped casing including a suction port and a discharge port arranged in the same straight line and defining a flow channel that connects the suction port and the discharge port; a motor disposed inside the casing, the motor including a rotating shaft extending along a flow channel direction directing from the suction port to the discharge port, a rotor rotating integrally with the rotating shaft, a stator provided on an outer peripheral side of the rotor, and a can for isolating a rotor chamber and a stator chamber, the rotor chamber having the rotor disposed therein and the stator chamber having the stator disposed therein; and an inverter disposed in the interior of the casing for exercising variable speed control over the motor.

1 . A pump apparatus comprising:
 a pipe-shaped casing including a suction port and a discharge port arranged in the same straight line and defining a flow channel that connects the suction port and the discharge port;   a motor disposed inside the casing, the motor including:
 a rotating shaft extending along a flow channel direction directing from the suction port to the discharge port; 
 a rotor rotating integrally with the rotating shaft; 
 a stator provided on an outer peripheral side of the rotor; and 
 a can for isolating a rotor chamber and a stator chamber, the rotor chamber having the rotor disposed therein and the stator chamber having the stator disposed therein; and 
   an inverter disposed in the interior of the casing for exercising variable speed control over the motor.   
     
     
         2 . The pump apparatus according to  claim 1 , further comprising a controller disposed in the interior of the casing. 
     
     
         3 . The pump apparatus according to  claim 1 , further comprising a communication part configured to perform at least one of transmission of information relating to the pump apparatus to the outside, reception of a set change command for the pump apparatus from the outside, and reception of a control command for the pump apparatus from the outside. 
     
     
         4 . The pump apparatus according to  claim 1  further comprising a power line communication unit configured to be capable of performing communication using a power line for supplying power to the pump apparatus as a communication line. 
     
     
         5 . The pump apparatus according to  claim 1 , further comprising a sensor disposed in the interior of the casing, the sensor being for detecting at least one of a discharge pressure of the pump apparatus and a suction pressure of the pump apparatus. 
     
     
         6 . The pump apparatus according to  claim 1 , further comprising:
 a pressure tank, the pressure tank including:
 a pipe-shaped pressure tank casing having an enlarged diameter portion which has enlarged diameter, and 
 an annular bladder disposed in the enlarged diameter portion. 
   
     
     
         7 . The pump apparatus according  claim 1 , comprising two or more impellers fixed to the rotating shaft. 
     
     
         8 . The pump apparatus according to  claim 1 , wherein the casing comprises:
 a first casing member that houses at least the motor; and   a second casing member connected to the first casing member, the second casing member including a first impeller having a first impeller rotating shaft configured to be connectable to the rotating shaft of the motor, and a bearing that axially supports the first impeller housed therein.   
     
     
         9 . The pump apparatus according to  claim 8 , wherein the casing further comprises: a third casing member connected to the second casing member, the third casing member including: a second impeller having a second impeller rotating shaft configured to be connectable to the rotating shaft of the motor via the first impeller rotating shaft; and a bearing that axially supports the second impeller housed therein. 
     
     
         10 . The pump apparatus according to  claim 1 , wherein the casing comprises:
 the first casing member in which at least the motor is housed, and   a fourth casing member connected to the first casing member and including the inverter housed therein.