Scroll compressor including a discharge port for discharging high-pressure gas provided around the periphery of a rib in the discharge cavity

1. A scroll compressor comprising: a housing; and a scroll compression mechanism which is accommodated and installed inside the housing,

wherein a discharge cavity for discharging a high-pressure gas compressed by the scroll compression mechanism is formed inside the housing,

wherein the housing is configured of a front housing and a rear housing which closes a rear-end opening of the front housing,

wherein a fixed scroll configuring the scroll compression mechanism is integrally molded on the rear housing via a rib part, and

wherein the discharge cavity to which a discharge port for discharging the high-pressure gas opens is provided around the rib part, and a discharge valve for opening and closing the discharge port is provided inside the discharge cavity.

2. The scroll compressor according to claim 1 ,

wherein the discharge cavity is separated from an intake cavity side by a first seal member which is interposed between an end-plate outer periphery of the fixed scroll and an inner periphery of the front housing, and the discharge cavity is separated from the atmosphere side by a second seal member which is interposed between the rear housing and the rear-end opening of the front housing, or a welding structure which is interposed therebetween.

3. The scroll compressor according to claim 2 ,

wherein the first seal member is an O ring which is disposed on an outer periphery of an end plate of the fixed scroll, and the second seal member is an O ring or a gasket which is disposed on a fitting-portion outer periphery of the rear housing or the end surface of the rear housing.

4. The scroll compressor according to claim 1 ,

wherein the rib part includes a main rib part which extends in radial directions of the rear housing and the fixed scroll, and a plurality of sub-rib parts which extend from the main rib part in a direction orthogonal to a longitudinal direction of the main rib part.

5. The scroll compressor according to claim 1 ,

wherein the discharge port extends in an axial direction from an end plate side of the fixed scroll toward a rib part side, is bored in a radial direction therefrom, and opens to the inside of the discharge cavity on a side surface of the rib part.

6. The scroll compressor according to claim 5 ,

wherein the discharge valve, which is configured such that a reed valve is screw-fixed to the side surface of the rib part via a valve retainer, is provided so as to be openable and closable on the discharge port.

7. The scroll compressor according to claim 1 ,

wherein the rib part is formed so as to avoid the discharge port which opens to an end plate center portion of the fixed scroll, and the discharge valve is installed on the discharge port via a valve retainer which is screwed to an end plate end surface of the fixed scroll in the axial direction.

8. The scroll compressor according to claim 7 ,

wherein a locking screw of the discharge valve is provided at a position corresponding to an installation hole of a high-pressure relief valve for protecting an discharge pressure or a TD thermostat for an discharge temperature which is installed on an end surface of the rear housing so as to communicate with the inside of the discharge cavity, and is fastened in the axial direction.