Positive displacement machine, compressor, cooling apparatus, and electronic equipment

Patent metadata

Field	Value
Publication number	US-12529362-B2
Application number	US-202318192790-A
Country	US
Kind code	B2
Filing date	Mar 30, 2023
Priority date	Mar 30, 2022
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

A positive displacement machine includes a housing including a tubular guide part in which a pressure chamber is provided, a slide member including a piston disposed in the guide part, the slide member sliding in a first direction, a coupling member coupled to the slide member and extending in a second direction intersecting the first direction, a first rotating member coupled to a first end portion of the coupling member and configured to rotate centering on a first rotation axis extending in the second direction, and a first motor. The first motor includes a first rotor coupled to the first rotating member and configured to rotate centering on the first rotation axis and an adjuster configured to adjust a position of the first rotor with respect to the housing, the position extending along an imaginary plane perpendicular to the first rotation axis.

First claim

What is claimed is:

1 . A positive displacement machine comprising:
a housing including a tubular guide part in which a pressure chamber is provided; a slide member including a piston disposed in the guide part, the slide member sliding in a first direction; a coupling sleeve receiving the slide member and extending in a second direction intersecting the first direction; a first rotating member coupled to a first end portion of the coupling sleeve and rotating centering on a first rotation axis extending in the second direction; and a first motor, wherein the first motor includes:
a first rotor coupled to the first rotating member and rotating centering on the first rotation axis; and
an adjuster plate to adjust a position of the first rotor with respect to the housing, the position extending along an imaginary plane perpendicular to the first rotation axis,
the first rotating member includes:
a first bearing supporting the first end portion; and
a first disposing part in which the first bearing is provided,
the first motor includes a rotor-side bearing disposed on an outer side of the first rotor when viewed along the first rotation axis and rotatably supporting the first rotor, and a maximum value of a position adjustment amount of the first rotor by the adjuster plate is larger than a value of a total interval obtained by totaling three respective intervals, comprising a first interval which is a largest first distance between an outer circumferential surface of the first rotor and an inner circumferential surface of the rotor-side bearing, a second interval which is a largest second distance between an outer circumferential surface of the first end portion and an inner circumferential surface of the first bearing, and a third interval which is a largest third distance between an outer circumferential surface of the first bearing and an inner circumferential surface of the first disposing part.

2 . The positive displacement machine according to claim 1 , wherein
the first rotating member includes: a first bearing configured to support the first end portion; and a first disposing part in which the first bearing is provided, the first bearing includes:
a first member into which the first end portion is inserted; and
a second member separate from the first member, disposed on an inside of the first disposing part, and configured to rotatably support the first member,
the first motor includes a rotor-side bearing disposed on an outer side of the first rotor when viewed along the first rotation axis and configured to rotatably support the first rotor, and a maximum value of a position adjustment amount of the first rotor by the adjuster is larger than a value of a total distance obtained by totaling a largest first distance between an outer circumferential surface of the first rotor and an inner circumferential surface of the rotor-side bearing, a largest second distance between an outer circumferential surface of the first end portion and an inner circumferential surface of the first member, a largest third distance between an outer circumferential surface of the first member and an inner circumferential surface of the second member, and a largest fourth distance between an outer circumferential surface of the second member and an inner circumferential surface of the first disposing part.

3 . The positive displacement machine according to claim 1 , further comprising:
a second rotating member coupled to a second end portion of the coupling sleeve to rotate on an opposite side of the first end portion, centering on a second rotation axis extending along the second direction, in an opposite direction of a rotating direction of the first rotating member; and a second motor coupled to the second rotating member, wherein the second rotating member includes:
a second bearing supporting the second end portion; and
a second disposing part in which the second bearing is provided,
a third direction is a direction orthogonal to the first rotation axis and extending from the first rotation axis toward the first bearing, and a fourth direction is a direction orthogonal to the second rotation axis and extending from the second rotation axis toward the second bearing, and the value of the total distance is larger than a difference value between a length between the first rotation axis and a center of the first bearing in the third direction and a length between the second rotation axis and a center of the second bearing in the fourth direction.

4 . The positive displacement machine according to claim 2 , further comprising:
a second rotating member coupled to a second end portion of the coupling member on an opposite side of the first end portion and configured to rotate, centering on a second rotation axis extending along the second direction, in an opposite direction of a rotating direction of the first rotating member; and a second motor coupled to the second rotating member, wherein the second rotating member includes:
a second bearing configured to support the second end portion; and
a second disposing part in which the second bearing is provided,
a third direction is a direction orthogonal to the first rotation axis and extending from the first rotation axis toward the first bearing, and a fourth direction is a direction orthogonal to the second rotation axis and extending from the second rotation axis toward the second bearing, and the value of the total distance is larger than a difference value between a length between the first rotation axis and a center of the first bearing in the third direction and a length between the second rotation axis and a center of the second bearing in the fourth direction.

5 . The positive displacement machine according to claim 1 , wherein
one of the housing and the adjuster plate includes a shaft projecting along the first rotation axis, another of the housing and the adjuster plate includes a hole into which the shaft is inserted, the hole is a clearance hole, an inner diameter of the hole being larger than an outer diameter the shaft, and the adjuster plate adjusts the position of the first rotor in a range until an outer circumferential surface of the shaft comes into contact with an inner surface of the hole.

6 . The positive displacement machine according to claim 5 , further comprising
a fixing screw to fix, to the housing, the first motor in which the position of the first rotor have been adjusted by the adjuster plate.

7 . The positive displacement machine according to claim 6 , wherein
the housing includes an attachment part to which the fixing member is attached, the fixing screw includes:
the shaft attached to the attachment part and projecting from the housing; and
a head provided at an end portion of the shaft and having an outer diameter larger than an outer diameter of the shaft, and
the adjuster plate includes the hole having an inner diameter larger than the outer diameter of the shaft and smaller than the outer diameter of the head.

8 . A compressor comprising the positive displacement machine according to claim 1 , wherein
the piston compresses gas flowing into the pressure chamber.

9 . A cooling apparatus comprising:
the compressor according to claim 8 , which compresses working fluid in a gas phase; and the cooling apparatus further comprises a condenser to condense the working fluid in the gas phase compressed by the compressor into the working fluid in a liquid phase; an expander to decompress the working fluid in the liquid phase condensed by the condenser and change the working fluid in the liquid phase to the working fluid in which the liquid phase and the gas phase are mixed; and an evapora

Assignees

• Seiko Epson Corp

Inventors

• Katsuda Osamu
• Nagatani Kaname
• Yamakawa Hidemasa

Classifications

• F25B31/026

  with compressor of rotary type · CPC title

• F04B27/053

  with an actuating element at the inner ends of the cylinders · CPC title

• F04B27/02

  having cylinders arranged oppositely relative to main shaft · CPC title

• F04B27/005

  with two cylinders · CPC title

• F25B2400/074

  with multiple cylinders · CPC title