ROTARY TYPE COMPRESSOR

• US 20090148325A1
• Filed: 04/04/2006
• Published: 06/11/2009
• Est. Priority Date: 04/20/2005
• Status: Active Grant

• Current Assignee: Daikin Industries Ltd
• Original Assignee: Daikin Industries Ltd
• Inventors: Masuda, Masanori, Sotojima, Takazo, Hori, Kazutaka, Shimizu, Takashi, Shibamoto, Yoshitaka, Furusho, Kazuhiro
• Granted Patent: US 7,802,972 B2
• Time in Patent Office: Days
• US Class Current: 418/54
• CPC Class Codes: F04C 18/02 of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
• CPC Class Codes: F04C 18/0215 where only one member is moving
• CPC Class Codes: F04C 18/045 having a C-shaped piston
• CPC Class Codes: F04C 18/322 with vanes hinged to the outer member and reciprocating with respect to the outer member
• CPC Class Codes: F04C 18/3564 the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 29/128 of the elastic type, e.g. reed valves
• CPC Class Codes: Y10T 137/7892 With stop

Abstract

A valve guard for restricting the amount of deformation of a valve disc has a main body part abuttable with the back surface of the valve disc, and a fixation part extending to outside of a receding part. Upon mounting the valve guard to an end plate part, the fixation part is firmly attached to the outside of the receding part of the end plate part.

Claims

1. A rotary type compressor comprising:

a movable member arranged to move in an eccentric motion; and

a fixed member which cooperates with the movable member to define a compression chamber arranged such that a fluid drawn into the compression chamber is compressed when the movable member is moved in the eccentric motion;

the fixed member having an end plate part with a front surface facing the compression chamber,

the end plate part being provided with a receding part formed on a back surface side thereof, a discharge passage fluidly communicating with the compression chamber and having an opening at a bottom surface of the receding part, and a discharge valve including a reed valve arranged to open and close the discharge passage,

the discharge valve having a plate shaped valve disc with a front surface that abuts with the bottom surface of the receding part and a valve guard arranged to restrict an amount of deformation of the valve disc, and

the valve guard having a main body part abuttable with a back surface of the valve disc and a fixation part integrally formed with the main body part and extending externally of the receding part along the back surface of the end plate part, the valve guard being mounted to the end plate part by fixation of the fixation part to the end plate part.

3. The rotary type compressor of claim 1, wherein

the discharge valve includes a pin member passing through a base end side of the valve disc to restrict movement of the valve disc.

4. The rotary type compressor of claim 3, wherein

a clearance gap is defined between the valve guard and the bottom surface of the receding part, the clearance gap being sized to allow the base end side of the valve disc to move in the axial direction of the pin member.

5. The rotary type compressor of claim 1, wherein

a base end side of the valve disc is tucked between the valve guard and the bottom surface of the receding part.

6. The rotary type compressor of claim 1, wherein

the valve disc is folded towards the back surface side of the end plate part at a base end side thereof and is tucked between the valve guard and a wall surface of the receding part.

7. A refrigeration apparatus having a refrigeration circuit with the rotary type compressor of claim 1 installed therein, wherein

the refrigeration apparatus performs a refrigeration cycle, and wherein the rotary type compressor compresses carbon dioxide as a refrigerant with which the refrigerant circuit is charged.

2. A rotary type compressor comprising:

a cylinder having a ring shaped cylinder chamber;

a ring-shaped piston arranged eccentrically with respect to the cylinder and housed in the ring shaped cylinder chamber such that the ring shaped cylinder chamber is divided into an outer cylinder chamber and an inner cylinder chamber;

a blade disposed in the ring shaped cylinder chamber to divide the outer and inner cylinder chambers into a first chamber and a second chamber; and

an end plate part disposed at one side of the cylinder and the ring-shaped piston and having a front surface facing the ring shaped cylinder chamber, the cylinder and the ring-shaped piston being arranged such that a fluid in the ring shaped cylinder chamber is compressed by relative eccentric rotation motion between the cylinder and the ring-shaped piston,

the end plate part being provided with a receding part formed on a back surface side thereof, a discharge passage fluidly communicating with the cylinder chamber and having an opening at a bottom surface of the receding part, and a discharge valve including a reed valve arranged to open and close the discharge passage;

the discharge valve having a plate shape valve disc with a front surface that abuts with the bottom surface of the receding part and a valve guard arranged to restrict deformation of the valve disc; and

the valve guard, having a main body part abuttable with a back surface of the valve disc and a fixation part integrally formed with the main body part and extending externally of the receding part along the back surface of the end plate part, the valve guard being mounted to the end plate part by fixation of the fixation part to the end plate part.

8. The rotary type compressor of claim 2, wherein

the discharge valve includes a pin member passing through a base end side of the valve disc to restrict movement of the valve disc.

9. The rotary type compressor of claim 8, wherein

a clearance gap is defined between the valve guard and the bottom surface of the receding part, the clearance gap being sized to allow the base end side of the valve disc to move in the axial direction of the pin member.

10. The rotary type compressor of claim 2, wherein

a base end side of the valve disc is tucked between the valve guard and the bottom surface of the receding part.

11. The rotary type compressor of claim 2, wherein

the valve disc is folded towards the back surface side of the end plate part at a base end side thereof and is tucked between the valve guard and a wall surface of the receding part.

12. A refrigeration apparatus having a refrigeration circuit with the rotary type compressor of claim 2 installed therein, wherein

the refrigeration apparatus performs a refrigeration cycle, and wherein the rotary type compressor compresses carbon dioxide as a refrigerant with which the refrigerant circuit is charged.