Scroll compressor having injection passage including first and second outlet passage sections

#This application is a U.S. national stage application of PCT/JP2018/002894 filed on Jan. 30, 2018, the contents of which are incorporated herein by reference.

#The present disclosure relates to scroll compressors, and in particular, relates to a scroll compressor including a compression mechanism having an injection passage.

#A related-art scroll compressor includes an electric mechanism including a stator and a rotor, a shaft fitted in the rotor, and a compression mechanism including an orbiting scroll disposed on an end of the shaft and a fixed scroll engaged with the orbiting scroll (refer to, for example, Patent Literature 1). The compression mechanism has a refrigerant compression chamber defined between a spiral element of the fixed scroll and a spiral element of the orbiting scroll and a refrigerant suction chamber disposed upstream of the refrigerant compression chamber in a direction in which refrigerant flows. In the scroll compressor disclosed in Patent Literature 1, the refrigerant suction chamber is disposed outside the refrigerant compression chamber.

#FIG. 1 is a schematic diagram of an exemplary configuration of a refrigeration cycle apparatus 200 including a scroll compressor 100 according to Embodiment 1.

#FIG. 2 is a sectional view of the scroll compressor 100 according to Embodiment 1.

#FIG. 3 is an enlarged view of a compression mechanism Cm in FIG. 2.

#Embodiment 1 will be described below with reference to the drawings. Note that the relationship between the sizes of components in the following figures may differ from that of actual ones. Furthermore, note that the forms of the components described herein are intended to be illustrative only and are not intended to be limited to those described herein.

#<Configuration in Embodiment 1>

#FIG. 1 is a schematic diagram of an exemplary configuration of a refrigeration cycle apparatus 200 including a scroll compressor 100 according to Embodiment 1. The configuration of the refrigeration cycle apparatus 200 will now be described with reference to FIG. 1. The refrigeration cycle apparatus 200 includes the scroll compressor 100 to compress refrigerant, a condenser 101 to liquefy the refrigerant, an expansion device 102 to reduce the pressure of the refrigerant, and an evaporator 103 to gasify the refrigerant. The refrigeration cycle apparatus 200 further includes a fan 101A to supply air to the condenser 101 and a fan 103A to supply air to the evaporator 103. In addition, the refrigeration cycle apparatus 200 includes a heat exchanger 104 disposed downstream of the condenser 101 and upstream of the expansion device 102 in a refrigerant flow direction and an expansion device 105 to reduce the pressure of the refrigerant to be supplied to the heat exchanger 104. Additionally, the refrigeration cycle apparatus 200 includes a controller Cnt to control a rotation speed of the scroll compressor 100, an opening degree of the expansion device 102, an opening degree of the expansion device 105, a rotation speed of the fan 101A, and a rotation speed of the fan 103A. The controller Cnt can perform injection control for supplying the refrigerant to the scroll compressor 100 by opening the expansion device 105.