A hermetic compressor according to the present disclosure may include an oil guide disposed on a rotating shaft between a driving motor and a main frame, the oil guide may include an oil block surrounding a main bearing surface between the main frame and the rotating shaft, and one end of the oil block may radially overlap a shaft support protrusion of the main frame. This can suppress oil returned after lubricating a compression unit from being scattered, thereby reducing a leakage of the oil to outside of a casing through a refrigerant discharge pipe.

A hermetic compressor according to the present disclosure may include an oil guide disposed on a rotating shaft between a driving motor and a main frame, the oil guide may include an oil block surrounding a main bearing surface between the main frame and the rotating shaft, and one end of the oil block may radially overlap a shaft support protrusion of the main frame. This can suppress oil returned after lubricating a compression unit from being scattered, thereby reducing a leakage of the oil to outside of a casing through a refrigerant discharge pipe.

A scroll compressor includes a compressor housing, an orbiting scroll member and non-orbiting scroll member intermeshed to form a compression chamber, a discharge pressure chamber, an intermediate pressure chamber. The housing includes a lower portion, a first intermediate cap, a second intermediate cap, and an upper portion. The discharge pressure chamber configured to receiving a discharge pressure fluid from the compression chamber. The intermediate pressure chamber fluidly connecting an intermediate pressure fluid inlet port and an intermediate pressure fluid injection port of the non-orbiting scroll member. A method injecting an intermediate pressure fluid into a compression chamber of a scroll compressor includes disposing the intermediate pressure fluid in an intermediate pressure chamber. The method also includes injecting the intermediate pressure fluid in the intermediate pressure chamber through the intermediate pressure fluid injection port into the compression chamber.

Provided are a scroll compressor, a refrigeration device, and a vehicle. In the scroll compressor, an oil discharging hole of an oil separation structure and an oil storage tank are connected to each other by an oil outlet channel disposed in a housing, and an oil outlet of the oil outlet channel is located above an oil inlet. The oil outlet channel can guide a refrigeration oil discharged from the oil discharging hole to flow into the oil storage tank. After passing through the oil outlet channel, a flow rate and a pressure of the refrigeration oil decrease, and thus an impact of the refrigeration oil on the remaining refrigeration oil in the oil storage tank is reduced when discharged from the oil outlet. Therefore, the refrigeration oil within the oil storage tank remains stable and can always immerse an oil return hole of the oil storage tank.

Provided are a scroll compressor, a refrigeration device, and a vehicle. In the scroll compressor, an oil discharging hole of an oil separation structure and an oil storage tank are connected to each other by an oil outlet channel disposed in a housing, and an oil outlet of the oil outlet channel is located above an oil inlet. The oil outlet channel can guide a refrigeration oil discharged from the oil discharging hole to flow into the oil storage tank. After passing through the oil outlet channel, a flow rate and a pressure of the refrigeration oil decrease, and thus an impact of the refrigeration oil on the remaining refrigeration oil in the oil storage tank is reduced when discharged from the oil outlet. Therefore, the refrigeration oil within the oil storage tank remains stable and can always immerse an oil return hole of the oil storage tank.

A delivery port of a rotary-screw compressor includes: a first opening having a profile configured to interrupt communication with a second working chamber of a suction process that opens only in the axial direction; a second opening connected to the first opening; and a third opening connected to the first opening and the second opening. The profile of the first opening includes: a first profile line that forms one of a pair of lateral edges of a lingulate protrusion configured to close off the second working chamber and extends toward a reference point; a second profile line that forms another one of the pair of the lateral edges of the protrusion; a third profile line that extends toward the reference point along the root circle of the female rotor; and a second connection line that connects the first profile line with the second profile line. The second opening is a first groove that opens into the first opening at the second connection line and extends toward a reference line. The third opening is a second groove that opens into the first groove and extends in an open state along the first profile line.

A delivery port of a rotary-screw compressor includes: a first opening having a profile configured to interrupt communication with a second working chamber of a suction process that opens only in the axial direction; a second opening connected to the first opening; and a third opening connected to the first opening and the second opening. The profile of the first opening includes: a first profile line that forms one of a pair of lateral edges of a lingulate protrusion configured to close off the second working chamber and extends toward a reference point; a second profile line that forms another one of the pair of the lateral edges of the protrusion; a third profile line that extends toward the reference point along the root circle of the female rotor; and a second connection line that connects the first profile line with the second profile line. The second opening is a first groove that opens into the first opening at the second connection line and extends toward a reference line. The third opening is a second groove that opens into the first groove and extends in an open state along the first profile line.

A pressure relief arrangement in refrigerant circuits with one high-pressure side and one low-pressure side, which is characterized in that the high-pressure side is fluidically connected with the low-pressure side of the refrigerant circuit via an overpressure relief device, wherein the overpressure relief device causes pressure reduction of the overpressure in the case of overpressure on the high-pressure side and fluid flows from the high-pressure side to the low-pressure side of the refrigerant circuit.

A compressor and an air conditioner are provided. The compressor includes a main shaft, a first cylinder and a second cylinder. The main shaft sequentially passes through the first cylinder and the second cylinder and can rotate therein, to compress refrigerant entering the first cylinder and the second cylinder. The second cylinder has an inner cavity capable of receiving the main shaft. A volume variation control cavity in communication with the inner cavity is provided in a side wall of the inner cavity, and a sliding vane is provided inside the volume variation control cavity. The volume variation control cavity can be selectively connected to a gas inlet and a gas outlet of the compressor, to change gas pressure in the volume variation control cavity, and drive the sliding vane to abut against or be separated from the main shaft by the gas pressure in the volume variation control cavity.

A compressor and an air conditioner are provided. The compressor includes a main shaft, a first cylinder and a second cylinder. The main shaft sequentially passes through the first cylinder and the second cylinder and can rotate therein, to compress refrigerant entering the first cylinder and the second cylinder. The second cylinder has an inner cavity capable of receiving the main shaft. A volume variation control cavity in communication with the inner cavity is provided in a side wall of the inner cavity, and a sliding vane is provided inside the volume variation control cavity. The volume variation control cavity can be selectively connected to a gas inlet and a gas outlet of the compressor, to change gas pressure in the volume variation control cavity, and drive the sliding vane to abut against or be separated from the main shaft by the gas pressure in the volume variation control cavity.