Scroll-type compressor

Patent metadata

Field	Value
Publication number	US-9803643-B2
Application number	US-201415029299-A
Country	US
Kind code	B2
Filing date	Oct 10, 2014
Priority date	Oct 18, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A scroll-type compressor includes: a movable scroll including a low-stage movable tooth portion having a spiral shape and protruding from a first side of a movable substrate portion in an axial direction, and a high-stage movable tooth portion having a spiral shape and protruding from a second side of the movable substrate portion in the axial direction; and a shaft arranged to extend through the movable substrate portion and causing the movable scroll to undergo revolution motion. A low-stage compression mechanism and a high-stage movable compression mechanism are provided on opposite sides of the movable substrate portion in the axial direction. The numbers of curling of the low-stage movable tooth portion and the high-stage movable tooth portion are set to be one.

First claim

What is claimed is:

1. A scroll-type compressor comprising:
a rotation shaft rotating by receiving a drive force from a rotational drive source;
a movable scroll revolving by a rotational drive force transmitted from the rotation shaft, the movable scroll including a movable substrate portion having a flat-plate shape, a low-stage movable tooth portion having a spiral shape and protruding from the movable substrate portion to a first side in an axial direction of the rotation shaft, and a high-stage movable tooth portion having a spiral shape and protruding from the movable substrate portion to a second side in the axial direction of the rotation shaft;
a low-stage fixed scroll including a low-stage substrate portion having a flat-plate shape, and a low-stage fixed tooth portion having a spiral shape, protruding from the low-stage substrate portion in the axial direction of the rotation shaft and engaging with the low-stage movable tooth portion;
a high-stage fixed scroll including a high-stage substrate portion having a flat-plate shape, and a high-stage fixed tooth portion having a spiral shape, protruding from the high-stage substrate portion in the axial direction of the rotation shaft and engaging with the high-stage movable tooth portion;
a low-stage compression chamber that is a space provided between the low-stage movable tooth portion and the low-stage fixed tooth portion, the low-stage compression chamber changing in volume in accordance with revolution of the movable scroll to pressurize a fluid sucked from an outside; and
a high-stage compression chamber that is a space provided between the high-stage movable tooth portion and the high-stage fixed tooth portion, the high-stage compression chamber changing in volume in accordance with revolution of the movable scroll to pressurize the fluid pressurized in the low-stage compression chamber, wherein
the rotation shaft extends through the movable substrate portion, and
a number of curling of at least one of the low-stage movable tooth portion and the high-stage movable tooth portion is less than or equal to one.

2. The scroll-type compressor according to claim 1 , wherein the number of curling of both the low-stage movable tooth portion and the high-stage movable tooth portion is less than or equal to one.

3. The scroll-type compressor according to claim 2 , wherein the low-stage movable tooth portion and the high-stage movable tooth portion are arranged such that a variation amplitude of a total torque variation obtained by summing a torque variation generated in the shaft due to a fluid in the low-stage compression chamber and a torque variation generated in the shaft due to a fluid in the high-stage compression chamber becomes smaller than that in a case where the low-stage movable tooth portion and the high-stage movable tooth portion are arranged in the same phase when viewed in the axial direction of the shaft.

4. The scroll-type compressor according to claim 3 , wherein the low-stage movable tooth portion and the high-stage movable tooth portion are arranged to be displaced from each other by 180° in phase in a circumferential direction with respect to a center axis when viewed in the axial direction of the rotation shaft.

5. A scroll-type compressor comprising:
a rotation shaft rotating by receiving a drive force from a rotational drive source;
a movable scroll revolving by a rotational drive force transmitted from the rotation shaft, the movable scroll including a movable substrate portion having a flat-plate shape, a low-stage movable tooth portion having a spiral shape and protruding from the movable substrate portion to a first side in an axial direction of the rotation shaft, and a high-stage movable tooth portion having a spiral shape and protruding from the movable substrate portion to a second side in the axial direction of the rotation shaft;
a low-stage fixed scroll including a low-stage substrate portion having a flat-plate shape, and a low-stage fixed tooth portion having a spiral shape, protruding from the low-stage substrate portion in the axial direction of the rotation shaft and engaging with the low-stage movable tooth portion;
a high-stage fixed scroll including a high-stage substrate portion having a flat-plate shape, and a high-stage fixed tooth portion having a spiral shape, protruding from the high-stage substrate portion in the axial direction of the rotation shaft and engaging with the high-stage movable tooth portion;
a low-stage compression chamber that is a space provided between the low-stage movable tooth portion and the low-stage fixed tooth portion, the low-stage compression chamber changing in volume in accordance with revolution of the movable scroll to pressurize a fluid sucked from an outside; and
a high-stage compression chamber that is a space provided between the high-stage movable tooth portion and the high-stage fixed tooth portion, the high-stage compression chamber changing in volume in accordance with revolution of the movable scroll to pressurize the fluid pressurized in the low-stage compression chamber, wherein
the rotation shaft extends through the movable substrate portion, and
at least one of the low-stage compression chamber and the high-stage compression chamber has a single space communicating with a discharge hole when communicating with the discharge hole through which a fluid is discharged from an inside of each compression chamber.

6. The scroll-type compressor according to claim 5 , wherein
at least one of the low-stage compression chamber and the high-stage compression chamber has a plurality of compression spaces when the rotation shaft rotates, and
the plurality of compression spaces are arranged asymmetrically about a center axis of the rotation shaft.

7. The scroll-type compressor according to claim 5 , wherein
the discharge hole includes an intermediate-pressure discharge hole provided in the low-stage fixed scroll to cause the fluid to flow out of an inside of the low-stage compression chamber, and a high-pressure discharge hole provided in the high-stage fixed scroll to cause the fluid to flow out of an inside of the high-stage compression chamber,
the low-stage compression chamber has a single space communicating with the intermediate-pressure discharge hole when communicating with the intermediate-pressure discharge hole, and
the high-stage compression chamber has a single space communicating with the high-pressure discharge hole when communicating with the high-pressure discharge hole.

8. The scroll-type compressor according to claim 7 , wherein the low-stage movable tooth portion and the high-stage movable tooth portion are arranged such that a variation amplitude of a total torque variation obtained by summing a torque variation generated in the shaft due to a fluid in the low-stage compression chamber and a torque variation generated in the shaft due to a fluid in the high-stage compression chamber becomes smaller than that in a case where the low-stage movable tooth portion and the high-stage movable tooth portion are arranged in the same phase when viewed in the axial direction of the shaft.

9. The scroll-type compressor according to claim 8 , wherein the low-stage movable tooth portion and the high-stage movable tooth portion are arranged to be displaced from each other by 180° in phase in a circumferential direction with respect to a center axis when viewed in the axial direction of the rotation shaft.

Assignees

• Denso Corp
• Nippon Soken
• Soken Inc

Inventors

• Ohno Yuichi
• Uchida Kazuhide
• Higashiyama Masashi

Classifications

• F04C23/008

  Hermetic pumps · CPC title

• F04C23/001 Primary

  of similar working principle · CPC title

• F04C29/0057

  for eccentric movement · CPC title

• F04C28/20 Primary

  by changing the form of the inner or outer contour of the working chamber · CPC title

• F04C18/0223

  with symmetrical double wraps · CPC title