Scroll compression device

Patent metadata

Field	Value
Publication number	US-9388808-B2
Application number	US-201114007244-A
Country	US
Kind code	B2
Filing date	Dec 20, 2011
Priority date	Mar 24, 2011
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

A scroll compression device that is adaptable to a larger elimination capacity by using a balancer of magnetic material is provided. A scroll compression mechanism 11 for compressing refrigerant and a driving motor 13 that is connected to the scroll compression mechanism 11 through a driving shaft 15 and drives the scroll compression mechanism 11 are accommodated in a casing 3, the scroll compression mechanism 11 is supported in the casing by a main frame 21, a rotor 39 of the driving motor 13 is connected to the driving shaft 15, the driving shaft 15 is supported in the casing by a bearing plate 8, an upper balancer 63 of magnetic material is secured onto the shaft above the stator 37 of the driving shaft 15, a lower balancer 77 of non-magnetic material is secured to the lower end of the rotor 39, and an auxiliary balancer 64 of non-magnetic material is secured in the gap between the upper end of the rotor 39 and the upper balancer 63.

First claim

The invention claimed is:

1. A scroll compression device, characterized in that
a scroll compression mechanism for compressing refrigerant and a driving motor that is connected to the scroll compression mechanism through a driving shaft and drives the scroll compression mechanism are accommodated in a casing,
the scroll compression mechanism is supported in the casing by a main frame,
a stator of the driving motor is directly or indirectly supported in the casing,
the driving shaft is connected to a rotor of the driving motor and the driving shaft is supported in the casing by a bearing plate,
an upper balancer formed of magnetic material is secured onto the shaft above the stator of the driving shaft, a lower balancer formed of non-magnetic material is secured to a lower end of the rotor by swaging to the rotor with rivets that penetrate vertically through the rotor, and an auxiliary balancer formed of non-magnetic material is secured in a gap between an upper end of the rotor and the upper balancer with at least some of the rivets,
the auxiliary balancer is configured in a semi-circular shape while the center thereof is located at the shaft center of the driving shaft, and the inner peripheral side is cut out in the peripheral direction so as to avoid the driving shaft,
the lower balancer has a shaft hole in which the driving shaft is inserted, and plural fixing holes in which the rivets are respectively inserted to each hole, and the lower balancer has a large-diameter portion that is provided positionally symmetrically with the auxiliary balancer, and at least two small-diameter portions that have at least some of the fixing holes, and
the auxiliary balancer is secured to the rotor with said at least some of the rivets which penetrate through said at least some of the fixing holes disposed in each of the small-diameter portions.

2. The scroll compression device according to claim 1 , wherein the auxiliary balancer is secured only just below the upper balancer.

3. The scroll compression device according to claim 1 , wherein the stator of the driving motor is supported through a spacer ring in the casing.

4. The scroll compression device according to claim 1 , wherein the driving motor is a DC driving motor which is driven by an inverter.

5. The scroll compression device according to claim 2 , wherein the stator of the driving motor is supported through a spacer ring in the casing.

6. The scroll compression device according to claim 2 , wherein the driving motor is a DC driving motor which is driven by an inverter.

7. The scroll compression device according to claim 3 , wherein the driving motor is a DC driving motor which is driven by an inverter.

Assignees

• Iitsuka Satoshi
• Kon Tsutomu
• Sugimoto Kazuyoshi
• Nagase Yoshihiko
• Panasonic Ip Man Co Ltd

Inventors

• Iitsuka Satoshi
• Kon Tsutomu
• Sugimoto Kazuyoshi
• Nagase Yoshihiko

Classifications

• F04C18/0207 Primary

  both members having co-operating elements in spiral form · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F04C2240/807

  Balance weight, counterweight · CPC title

• F04C2240/403

  with inverter for speed control · CPC title

• F05C2251/125

  non-magnetic · CPC title