Compressor
A technology of compressors and compression mechanisms, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of cooling, low thermal conductivity, etc.
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no. 1 approach
[0046] The rotary compressor 10 according to the first embodiment of the present invention is installed in, for example, a refrigerant circuit of an air conditioner, and compresses refrigerant sucked in from an evaporator and sprays it toward a radiator. Such as figure 1 As shown, the rotary compressor 10 includes a casing 11 , a motor 20 and a compression mechanism 30 .
[0047] The casing 11 includes a cylindrical trunk portion 12 , an upper end plate 13 sealing the upper end side of the trunk portion 12 , and a lower end plate 14 sealing the lower end side of the trunk portion 12 . The first suction pipe 15a and the second suction pipe 15b are installed on the trunk portion 12 through the lower part of the trunk portion 12; the discharge pipe 16 is installed on the upper side of the upper end plate 13 through the upper end plate 13. part. The motor 20 and the compression mechanism 30 are installed in the casing 11 . An oil reservoir 17 is formed at the bottom of the lowe...
no. 2 approach
[0093] The rotary compressor 10 in the second embodiment omits the groove portion 61 forming the elastic bearing 62 in the first embodiment, and the decompression groove 65 and the second annular groove 74 do not communicate directly, but via a thrust bearing surface. 26a and the gap 65b between the upper end surface 35b of the rear cylinder head 35 communicates indirectly.
[0094] Specifically, as Figure 6 and Figure 7 As shown, the inner peripheral edge of the decompression groove 65 is located closer to the outer peripheral side than the inner peripheral edge of the thrust bearing surface 26a. In the second embodiment, the decompression groove 65 is formed at such a position that the decompression groove 65 and the second annular groove 74 communicate not directly but via the thrust bearing surface 26 a and the upper end surface 35 b of the rear cylinder head 35 . The gap 65b between them communicates indirectly.
[0095] Here, as described above, since the thrust bea...
no. 3 approach
[0101] The rotary compressor 10 in the third embodiment changes the shape of the decompression groove 65 in the first embodiment.
[0102] Specifically, as Figure 8 As shown, in the third embodiment, the axial length of the decompression groove 65 is shorter than that of the first embodiment (the groove depth is shallower). Like the first embodiment, the outer peripheral edge is closer to the outer peripheral side than the outer peripheral edge of the elastic bearing 62 (the inner peripheral edge of the groove portion 61), and the inner peripheral edge is closer to the inner peripheral edge of the elastic bearing 62 (the inner peripheral edge of the rear cylinder head 35). same. In the third embodiment, a portion of the decompression groove 65 opposite to the upper end surface of the elastic bearing 62 is formed as a communication portion 65 a through which the decompression groove 65 communicates with the second annular groove 74 .
[0103]In the third embodiment, the comm...
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