Compressor valve system and assembly

• US 10,495,086 B2
• Filed: 05/05/2017
• Issued: 12/03/2019
• Est. Priority Date: 11/15/2012
• Status: Active Grant

• Current Assignee: Copeland Corporation LLC (Emerson Electric Company)
• Original Assignee: Emerson Climate Technologies Incorporated (Emerson Electric Company)
• Inventors: Stover, Robert C., Bonear, Ronald E., Ignatiev, Kirill M.
• Primary Examiner(s): Plakkoottam, Dominick L
• Application Number:
  US15/587,735
• Publication Number:
  US 20170268510A1
• Time in Patent Office: 942 Days
• Field of Search: 418 551- 555, 4174105
• CPC Class Codes: F01C 1/0207 both members having co-operating elements in spiral form
• CPC Class Codes: F01C 1/0215 where only one member is moving
• 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 18/0207 both members having co-operating elements in spiral form
• CPC Class Codes: F04C 18/0215 where only one member is moving
• CPC Class Codes: F04C 18/0253 Details concerning the base
• CPC Class Codes: F04C 18/0292 Ports or channels located in the wrap
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 28/12 using sliding valves
• CPC Class Codes: F04C 29/124 with inlet and outlet valves specially adapted for rotary or oscillating piston pumps

Abstract

A compressor may include first and second scroll members having first and second scroll wraps, respectively. The scroll members define a suction inlet, a discharge outlet, and fluid pockets moving therebetween. The second scroll member may include a port, and a passage. The port may be in fluid communication with at least one of the pockets. The passage may extend through a portion of the second end plate and may be in fluid communication with the port. A valve assembly may be disposed in the passage and may include a valve member displaceable between open and closed positions. A recompression volume may be disposed between the valve member and the at least one of the pockets. The recompression volume may be less than or equal to approximately one percent of a volume of one of the pockets at a suction seal-off position.

Claims

1. A compressor comprising:

a first scroll member including a first scroll wrap extending from a first end plate;

a second scroll member including a second scroll wrap extending from a second end plate, said second scroll wrap being intermeshed with said first scroll wrap, said first and second scroll members defining a plurality of fluid pockets moving between a radially outer position and a radially inner position, said second end plate including a discharge passage, a port and a bore, said port and said bore disposed radially outward relative to said discharge passage, said port being in fluid communication with at least one of said fluid pockets, said bore extending through a portion of said second end plate providing fluid communication between said port and a fluid region; and

a valve assembly disposed in said bore and including a valve member, a valve housing, and a spring,

wherein the valve member is displaceable between an open position and a closed position, wherein said port is in fluid communication with said fluid region via said bore when said valve member is in said open position, and wherein said port is fluidly isolated from said fluid region when said valve member is in said closed position,

wherein said valve housing is fixed within said bore and including an inner bore having a first portion and a second portion, wherein said first portion includes a first diameter, wherein said second portion includes a second diameter that is smaller than the first diameter, and wherein said valve housing includes a valve seat disposed between said first and second portions,

wherein said first portion slidably receives the valve member, and wherein said spring biases said valve member toward said closed position in which said valve member contacts said valve seat, and

wherein said valve housing includes an aperture extending into said first portion and through an outer diametrical surface of said valve housing, and wherein said aperture provides fluid communication between said port and said first portion.

2. The compressor of claim 1, wherein said aperture is disposed directly adjacent said port and said valve member.

3. The compressor of claim 1, wherein said second portion is in fluid communication with said port when said valve member is in said open position, and wherein said valve member blocks fluid communication between said second portion and said port when said valve member is in said closed position.

4. The compressor of claim 1, wherein said valve housing includes an outer surface defining a first outer diameter and a recessed portion defining a second outer diameter, wherein said second outer diameter is a smaller diameter than said first outer diameter, and wherein the aperture extends through said recessed portion and provide fluid communication between said first portion and said port.

5. The compressor of claim 1, further comprising a hollow fastener engaging said bore and disposed adjacent to said valve housing, said hollow fastener retaining said valve housing in a fixed location relative to said bore.

6. The compressor of claim 5, wherein said valve assembly includes a valve cap engaging said bore and closing an end of said first portion.

7. The compressor of claim 6, wherein said valve assembly includes a wear washer disposed axially between said spring and said valve member.

8. The compressor of claim 1, wherein said fluid region is a fluid-injection source.