US 12,071,950 B2
Electric compressor
Takayuki Hagita, Tokyo (JP); Akinori Yoshioka, Tokyo (JP); Manabu Suzuki, Tokyo (JP); and Hideo Saho, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD., Tokyo (JP)
Appl. No. 17/767,001
Filed by MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD., Tokyo (JP)
PCT Filed Oct. 11, 2019, PCT No. PCT/JP2019/040222
§ 371(c)(1), (2) Date Apr. 6, 2022,
PCT Pub. No. WO2021/070357, PCT Pub. Date Apr. 15, 2021.
Prior Publication US 2022/0372980 A1, Nov. 24, 2022
Int. Cl. F04C 18/02 (2006.01); F04C 23/02 (2006.01)
CPC F04C 23/02 (2013.01) [F04C 18/0215 (2013.01); F04C 2240/30 (2013.01); F04C 2240/40 (2013.01); F04C 2240/808 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electric compressor comprising:
a housing that accommodates a compressor and an electric motor that drives the compressor;
an inverter device including a circuit substrate on which an electronic component is mounted;
an accommodation casing including an accommodation portion body provided on a side surface of the housing to accommodate the inverter device, a substrate support portion that protrudes to an inside of the accommodation portion body to support one surface of the circuit substrate, and a cover member fixed to the accommodation portion body to close an opening of the accommodation portion body;
a bolt which is fastened to the substrate support portion to restrict a position of the circuit substrate with respect to the substrate support portion, and in which one surface of a head facing an inner surface of the cover member is flat; and
a first vibration isolation member that is disposed between the one surface of the head and the inner surface of the cover member and that is bonded to the one surface of the head and to the inner surface of the cover member, wherein the compressor includes a fixed scroll and a movable scroll each having a spiral shape, a plurality of compression chambers that are formed between the fixed scroll and the movable scroll to compress a refrigerant by means of a movement of the movable scroll, and a discharge port that discharges the compressed refrigerant, when an average value of a length S1 (mm) of an inner curved line of the fixed scroll in a stage where the compressor discharges the refrigerant from the discharge port, the fixed scroll partitioning a compression chamber formed on an innermost side among the plurality of compression chambers, and of a length S2 (mm) of an outer curved line of the movable scroll that partitions the compression chamber formed on the innermost side is an average value SAV (mm), an eigenvalue E (kHz) of the cover member satisfies the following equation (1): E≥V/SAV . . . (1) here, in the equation (1), V (m/s) is a sound speed of the refrigerant.