Hermetic electric compressor

Patent metadata

Field	Value
Publication number	US-12092112-B2
Application number	US-202117907041-A
Country	US
Kind code	B2
Filing date	Jun 18, 2021
Priority date	Sep 29, 2020
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

According to a hermetic electric compressor of the present invention, a discharge port 66 a is placed downstream of eddying flow from the joint portion 66 b , a bent portion 66 c is formed between the joint portion 66 b and the discharge port 66 a , an imaginary plumb line 66 a Y of an opening surface formed on the discharge port 66 a is oriented to a circumferential direction of a hermetic container 10 , and fluid having a small lubrication oil content is taken out from the discharge port 66 a utilizing eddying flow of mixture fluid of refrigerant and lubrication oil in a gap space between a compressing mechanism 20 and a motor section 30 , thereby reducing a discharge amount from the hermetic container 10.

First claim

The invention claimed is:

1. A hermetic electric compressor comprising a compressing mechanism and a motor section provided in a hermetic container, in which
the compressing mechanism and the motor section are connected to each other through a drive shaft,
the compressing mechanism is placed on one side in the hermetic container,
the motor section is placed on an other side in the hermetic container,
the motor section is composed of an annular stator and a rotor that is rotatably provided on an inner side of the stator,
a discharge pipe is placed in a gap space between the compressing mechanism and the motor section,
a discharge port of the discharge pipe extends into the gap space from a joint portion between the discharge pipe and the hermetic container,
the drive shaft is pivotally supported by a bearing portion,
an oil reservoir is formed in an inner bottom of the hermetic container,
an oil supply passage that guides lubrication oil stored in the oil reservoir into the compressing mechanism and the bearing portion is formed in the drive shaft,
the drive shaft is provided with a balancer,
the balancer is located below the compressing mechanism and above the motor section,
an oil-receiving member receiving lubrication oil that drops toward the motor section is provided on an outer periphery of the balancer,
a circumference of the balancer and the oil-receiving member are covered by a cover,
refrigerant compressed in the compressing mechanism is discharged into the hermetic container, and
the refrigerant discharged into the hermetic container becomes eddying flow in the gap space by rotation of the drive shaft, and is discharged to outside of the hermetic container from the discharge pipe, wherein
the discharge port is placed downstream of the eddying flow from the joint portion,
the discharge port is placed vertically above the stator without reaching vertically above the rotor, and
the discharge port is placed at a same height as the cover.

2. The hermetic electric compressor according to claim 1 , wherein a bent portion is formed between the joint portion and the discharge port.

3. The hermetic electric compressor according to claim 2 , wherein, in the joint portion, the discharge pipe is vertically jointed to the hermetic container.

4. The hermetic electric compressor according to claim 1 , wherein, in the joint portion, the discharge pipe is obliquely jointed to the hermetic container.

5. The hermetic electric compressor according to claim 4 , wherein the discharge pipe from the joint portion to the discharge port is formed as a straight pipe.

6. The hermetic electric compressor according to claim 1 , wherein an imaginary plumb line of an opening surface formed on the discharge port is oriented to a circumferential direction of the hermetic container.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Sasa Takuji
• OGI Daisuke
• Sato Kazuya
• Kon Tsutomu
• Higashida Takashi

Classifications

• F04C29/06

  Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N) · CPC title

• F04C29/12

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04B39/123

  Fluid connections · CPC title

• F04B39/04 Primary

  Measures to avoid lubricant contaminating the pumped fluid · CPC title

• F04C28/28

  Safety arrangements; Monitoring · CPC title