The invention relates to a horizontal
rotary compressor, comprising a housing, wherein, the inner pressure of the housing is high, and a compression component and an
electric motor are arranged in the housing; the compression component and the periphery of the
electric motor are respectively fixed on the inner
diameter of the housing and divide the interior of the housing into three cavity chambers, i.e. a
crank shaft penetration oil cavity, a first
electric motor cavity and a second electric motor cavity; more than one incision gaps are arranged between the bottom of a rotor and the inner
diameter of the housing, both ends of each incision gap are respectively provided with holes on the first electric motor cavity and the second electric motor cavity, the upper part of an air cylinder is provided with an air passage, the lower part is provided with an oil passage, and the air passage and the oil passage are respectively provided with holes on first electric motor cavity and the oil cavity; and an exhaust
muffler is arranged on a
main bearing or a supplementary bearing, one end of a
communication channel is provided with a hole on the exhaust
muffler, the other end is provided with a hole on the second electric motor cavity, and
high pressure air and oil exhausted from the compression component are led into the second electric motor cavity by the
communication channel. The horizontal
rotary compressor can reduce the oil
discharge volume, uniformly cool the
machine winding and greatly improve the reliability of the compressor.