EP0060140A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Scroll type compressor with displacement adjusting mechanism
Assignee: Sanden Corp
•
Filing: 1982-03-09
•
Granted: —
•
Expires: 2002-03-09
Abstract
Abstract A scroll type compressor is disclosed. The compressor (1) includes a housing (10). A fixed scroll (27) is joined to the housing and includes a first end plate (271) from which a first wrap (272) extends. An orbiting scroll (28) also includes second end plate (281) from which a second wrap (282) extends. The wrap (272, 282) interfit at an angular and radial offset to make a plurality of line contacts to define at least one pair of sealed off fluid pockets. The first end plate (271) is formed with at least two holes which are placed at the symmetrical positions. A first of the holes (275) is placed at a location, defined by involute angles within the area defined by φ end > ϕ 1 > end-2π, where ϕ end is the final involute angle of the wrap (272) which extends from the end plate (27) . having the holes, and φ 1 is the involute angle at which the first hole is placed. The second hole (276) is located at an involute angle approximately at φ 1-π. A control mechanism (37) controls the opening and closing of the holes (275, 276) to thereby control the capacity of compressor (1).
Inventors
- 👤 Masaharu Hiraga
- 👤 Atsushi Mabe
- 👤 Yuji Yoshii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:06
CPC Classifications
F; F04; F04C; F04C28/00; F04C28/10; F04C28/16; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87708; Y10T137/87772
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
256 words
A scroll type compressor including a pair of scroll members each having an end plate and a wrap extending from one side surface of said end plate, said wraps interfitting at angular and radial offset to make a plurality of line contacts between said wraps to define at least one pair of sealed off fluid pockets, and a driving mechanism operatively connected to one of said scroll members for orbiting said one scroll member relatively to the other scroll member while preventing rotation of said one scroll member to thereby change the volume of the fluid pockets, characterised by one of said end plates having at least one pair of holes through it to place opposite sides of said one end plate in fluid communication through said holes, said holes being located at symmetrical locations along the wrap which extends from the said one end plate so that said other wrap simultaneously crosses over both of said holes, a first of said holes being located within an area defined by Ø end > Ø 1 > ø end - 2π, where Ø end is the final involute angle of the wrap extending from the said one end plate through which said holes are formed and Ø1 is the involute angle at which said first hole is located, the other of said holes being located at an involute angle of approximately Ø1-π, and control means for selectively opening and closing said holes to permit fluid communication therethrough and to selectively control the displacement volume of said compressor.
Claim 2
Dependent Claim
256 words
A scroll type compressor including a pair of scroll members each having an end plate and a wrap extending from one side surface of said end plate, said wraps interfitting at angular and radial offset to make a plurality of line contacts between said wraps to define at least one pair of sealed off fluid pockets, and a driving mechanism operatively connected to one of said scroll members for orbiting said one scroll member relatively to the other scroll member while preventing rotation of said one scroll member to thereby change the volume of the fluid pockets, characterised by one of said end plates having at least one pair of holes through it to place opposite sides of said one end plate in fluid communication through said holes, said holes being located at symmetrical locations along the wrap which extends from the said one end plate so that said other wrap simultaneously crosses over both of said holes, a first of said holes being located within an area defined by Ø end > Ø 1 > ø end - 2π, where Ø end is the final involute angle of the wrap extending from the said one end plate through which said holes are formed and Ø1 is the involute angle at which said first hole is located, the other of said holes being located at an involute angle of approximately Ø1-π, and control means for selectively opening and closing said holes to permit fluid communication therethrough and to selectively control the displacement volume of said compressor.
Claim 3
Dependent Claim
72 words
A scroll type compressor as claimed in claim 1, wherein said control means includes a valve member and an electromagnetic coil actuator, said valve member being attached to the end surface of said one end plate and covering the opening of each of said holes, said electromagnetic coil being supported adjacent said valve member to move said valve member toward and away from said end surface to open and close said holes.
Claim 4
Dependent Claim
24 words
A scroll type compressor as claimed in claim 2, wherein said valve member comprises a separate flat plate attached adjacent each of said holes.
Claim 5
Dependent Claim
17 words
A scroll type compressor as claimed in claim 2, wherein said valve member comprises an annular plate.
Claim 6
Dependent Claim
38 words
A scroll type compressor as claimed in claim 1, 2, 3 or 4, wherein said first and second holes extend into a portion of the wrap which extends from the end plate in which said holes are formed.
Claim 7
Dependent Claim
39 words
A scroll type compressor as claimed in claim 5, wherein the first of said holes extends into the inner wall of said last-mentioned wrap, and the second of said holes extends into the outer wall of said last-mentioned wrap.
Claim 8
Dependent Claim
264 words
A scroll type compressor comprising; a housing having fluid inlet port and fluid outlet port; a fixed scroll joined to said housing and having a first end plate from which a first wrap extends into said housing; an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to make a plurality of line contacts to define at least one pair of sealed off fluid pockets; a driving mechanism including a rotatable drive shaft to drive said orbiting scroll in orbital motion by the rotation of said drive shaft to thereby change the volume of the fluid pocket; characterised by one of said end plates having at least one pair of holes through it to place opposite sides of said one end plate in fluid communication through said holes, said holes being located at symmetrical locations along the wrap which extends from the said one end plate so that said other wrap simultaneously crosses over both of said holes, a first of said holes being located within an area defined by Ø end Ø 1 > Ø end - 2π, where Øend is the final involute angle of the wrap extending from the said one end plate through which said holes are formed and 01 is the involute angle at which said first hole is located, the other of said holes being located at an involute angle of approximately Ø1 -TT; and control means for selectively opening and closing said holes to selectively control the displacement volume of said compressor.
Claim 9
Dependent Claim
264 words
A scroll type compressor comprising; a housing having fluid inlet port and fluid outlet port; a fixed scroll joined to said housing and having a first end plate from which a first wrap extends into said housing; an orbiting scroll having an end plate from which a second wrap extends, said first and second wraps interfitting at an angular and radial offset to make a plurality of line contacts to define at least one pair of sealed off fluid pockets; a driving mechanism including a rotatable drive shaft to drive said orbiting scroll in orbital motion by the rotation of said drive shaft to thereby change the volume of the fluid pocket; characterised by one of said end plates having at least one pair of holes through it to place opposite sides of said one end plate in fluid communication through said holes, said holes being located at symmetrical locations along the wrap which extends from the said one end plate so that said other wrap simultaneously crosses over both of said holes, a first of said holes being located within an area defined by Ø end Ø 1 > Ø end - 2π, where Øend is the final involute angle of the wrap extending from the said one end plate through which said holes are formed and 01 is the involute angle at which said first hole is located, the other of said holes being located at an involute angle of approximately Ø1 -TT; and control means for selectively opening and closing said holes to selectively control the displacement volume of said compressor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.