Rotary compressor and refrigeration apparatus

Abstract

A rotary compressor includes a first head, a first cylinder having a first cylinder chamber, a middle plate, a second cylinder having a second cylinder chamber, a second head, a first piston eccentrically rotatable in the first cylinder chamber, a second piston eccentrically rotatable in the second cylinder chamber, a first suction pipe, an in head suction passage, and a second suction pipe. The first suction pipe is connected to the first cylinder to suck a fluid into the first cylinder chamber. The in head suction passage is provided in the second head and communicates with the second cylinder chamber. The second suction pipe is connected to the second head to suck a fluid into the second cylinder chamber through the in head suction passage.

1 . A rotary compressor comprising:
 a first head;   a first cylinder having a first cylinder chamber;   a middle plate;   a second cylinder having a second cylinder chamber;   a second head;   a first piston eccentrically rotatable in the first cylinder chamber;   a second piston eccentrically rotatable in the second cylinder chamber;   a first suction pipe connected to the first cylinder to suck a fluid into the first cylinder chamber;   an in head suction passage provided in the second head and communicating with the second cylinder chamber; and   a second suction pipe connected to the second head to suck a fluid into the second cylinder chamber through the in head suction passage.   
     
     
         2 . The rotary compressor of  claim 1 , wherein
 the first head has a threaded hole,   the first cylinder, the middle plate, the second cylinder, and the second head each have a through hole located to correspond to the threaded hole, and   a bolt is inserted from a second head side to fasten the first head, the first cylinder, the middle plate, the second cylinder, and the second head.   
     
     
         3 . The rotary compressor of  claim 1 , wherein
 the first cylinder has a threaded hole,   the middle plate, the second cylinder, and the second head each have a through hole located to correspond to the threaded hole, and   a bolt is inserted from a second head side to fasten the first cylinder, the middle plate, the second cylinder, and the second head.   
     
     
         4 . The rotary compressor of  claim 1 , wherein
 the in head suction passage includes
 a first passage extending in a radial direction, and 
 a second passage extending in an axial direction to allow the first passage and the second cylinder chamber to communicate with each other. 
   
     
     
         5 . A refrigeration apparatus including the rotary compressor of  claim 1 , the refrigeration apparatus further comprising:
 a fluid circuit through which a fluid compressed by the rotary compressor flows.   
     
     
         6 . The rotary compressor of  claim 2 , wherein
 the in head suction passage includes
 a first passage extending in a radial direction, and 
 a second passage extending in an axial direction to allow the first passage and the second cylinder chamber to communicate with each other. 
   
     
     
         7 . The rotary compressor of  claim 3 , wherein
 the in head suction passage includes
 a first passage extending in a radial direction, and 
 a second passage extending in an axial direction to allow the first passage and the second cylinder chamber to communicate with each other. 
   
     
     
         8 . A refrigeration apparatus including the rotary compressor of  claim 2 , the refrigeration apparatus further comprising:
 a fluid circuit through which a fluid compressed by the rotary compressor flows.   
     
     
         9 . A refrigeration apparatus including the rotary compressor of  claim 3 , the refrigeration apparatus further comprising:
 a fluid circuit through which a fluid compressed by the rotary compressor flows.   
     
     
         10 . A refrigeration apparatus including the rotary compressor of  claim 4 , the refrigeration apparatus further comprising:
 a fluid circuit through which a fluid compressed by the rotary compressor flows.