Compressor

Abstract

A compressor is provided that includes a casing defining an inner space, a suction pipe connected to the casing, a discharge pipe connected to the casing, a motor located at the inner space of the casing, a compressing unit driven by the motor to compress a refrigerant, an oil separating unit configured to separate oil from the refrigerant discharged from the compressing unit, and an oil recollecting unit configured to pump the oil separated by the oil separating unit and recollect the separated oil into the compressor main body.

1 . A compressor comprising:
 a compressor main body including a casing defining an inner space;   a suction pipe connected to the casing;   a discharge pipe connected to the casing;   a motor installed at the inner space of the casing;   a compressing unit driven by the motor to compress a refrigerant;   an oil separating unit configured to separate oil from the refrigerant discharged from the compressing unit; and   an oil recollecting unit configured to pump the oil separated by the oil separating unit and recollect the separated oil into the compressor main body.   
   
   
       2 . The compressor of  claim 1 , wherein the oil recollecting unit includes an oil recollecting pipe connected to the oil separating unit. 
   
   
       3 . The compressor of  claim 2 , wherein the oil separating unit is located outside of the casing of the compressor main body, the oil separating unit having an inlet connected to the compressor main body via the discharge pipe and an outlet connected to the compressor main body via the oil recollecting pipe. 
   
   
       4 . The compressor of  claim 3 , wherein the oil recollecting pipe has one end connected to the compressor main body and another end connected to the outlet of the oil separating unit. 
   
   
       5 . The compressor of  claim 3 , wherein the oil separating unit is supported by a supporting member fixed to an outer circumferential surface of the casing of the compressor main body. 
   
   
       6 . The compressor of  claim 2 , wherein the oil recollecting unit includes an oil recollecting pump disposed at an intermediate portion of the oil recollecting pipe to pump oil separated by the oil separating unit. 
   
   
       7 . The compressor of  claim 1 , wherein the oil separating unit is located inside the casing of the compressor main body. 
   
   
       8 . The compressor of  claim 7 , wherein the oil recollecting unit includes an oil recollecting pipe located inside the casing of the compressor main body to guide oil separated by the oil separating unit. 
   
   
       9 . The compressor of  claim 7 , wherein the oil recollecting unit includes an oil recollecting pipe to guide oil separated by the oil separating unit, and
 wherein at least a portion of the oil recollecting pipe is located outside the casing of the compressor main body.   
   
   
       10 . The compressor of  claim 7 , wherein the oil separating unit includes:
 an inner space; and   an oil separating pipe to guide the separated oil, the oil separating pipe being bent or curved such that a refrigerant introduced into the inner space of the oil separating unit spirally orbits.   
   
   
       11 . The compressor of  claim 1 , wherein the compressing unit includes:
 a fixed scroll fixedly installed at the casing; and   an orbiting scroll engaged with the fixed scroll and orbiting in cooperation with the motor, the fixed scroll and orbiting scroll defining at least one compression chamber.   
   
   
       12 . The compressor of  claim 1 , wherein the inner space of the casing is a hermetic inner space. 
   
   
       13 . A compressor comprising:
 a casing having an inner space;   a suction pipe connected to the casing;   a discharge pipe connected to the casing;   a motor located in the inner space of the casing to generate a driving force;   a compressing unit driven by the motor to compress a refrigerant;   an oil separating unit configured to separate oil from the refrigerant discharged out of the compressing unit; and   an oil recollecting unit including an oil recollecting pump driven by a rotation force of the motor to pump oil separated by the oil separating unit.   
   
   
       14 . The compressor of  claim 13 , wherein the motor includes:
 a crankshaft; and   
     wherein the oil recollecting pump includes:
 an inner gear coupled to the crankshaft of the motor; 
 an outer gear engaged with the inner gear to generate a variable capacity; and 
 an inlet to receive oil separated by the oil separating unit. 
 
   
   
       15 . The compressor of  claim 13 , wherein the oil recollecting pump includes a first inlet connected to the oil separating unit and a second inlet in communication with the inner space of the casing. 
   
   
       16 . The compressor of  claim 15 , wherein the crankshaft of the motor includes an oil passage located therein, the oil passage extending in an axial direction of the crankshaft, and
 wherein the oil recollecting pump includes an outlet in communication with the first and second inlets, the outlet being in communication with the oil passage located in the crankshaft.   
   
   
       17 . The compressor of  claim 13 , further comprising an oil supplying pump disposed at one side of the oil recollecting pump,
 wherein the motor includes a crankshaft, and the oil supplying pump is coupled to the crankshaft of the motor to rotate together with the oil recollecting pump, thereby pumping oil contained in the casing.   
   
   
       18 . The compressor of  claim 17 , wherein the oil supplying pump includes an inlet and an outlet, the oil recollecting pump includes an inlet and an outlet, and the inlet and outlet of the oil supplying pump are arranged independent of the inlet and outlet of the oil recollecting pump. 
   
   
       19 . A compressor comprising:
 a casing having an inner space;   a suction pipe connected to the casing;   a discharge pipe connected to the casing;   a motor located in the inner space of the casing to generate a driving force;   a compressing unit driven by the motor to compress a refrigerant;   an oil separating unit configured to separate oil from the refrigerant discharged out of the compressing unit; and   an oil recollecting unit including:
 an oil recollecting pipe for connecting the oil separating unit to the casing; and 
 an oil recollecting pump cooperating with the oil recollecting pipe to pump oil separated by the oil separating unit. 
   
   
   
       20 . The compressor of  claim 19 , wherein the oil recollecting pipe has an outlet in communication with the inner space of the casing. 
   
   
       21 . The compressor of  claim 20 , wherein the motor includes a crankshaft and the oil recollecting pipe includes an outlet, the compressor further comprising:
 an oil supplying pump having an inlet, the oil supplying pump being located at the crankshaft to pump oil contained in the casing while rotating together with the crankshaft, and the outlet of the oil recollecting pipe being connected to the inlet of the oil supplying pump.   
   
   
       22 . The compressor of  claim 19 , wherein the oil recollecting pump includes an inverter motor such that a pumping amount is variable in proportion to a rotation velocity of the motor. 
   
   
       23 . The compressor of  claim 19 , wherein the oil recollecting pump is located at an intermediate portion of the oil recollecting pipe.