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US 6,203,300 B1Granted
Scroll compressor with structure for preventing reverse rotation
OwnerJohn R. Williams, John M. Hunnicutt +1inventors
InventorsJohn R. Williams, John M. Hunnicutt, Joe T. Hill
Life of this patent
Estimating the term…
Abstract
A scroll compressor includes structure between an eccentric and a slider block that separates the scroll wraps when the orbiting scroll is driven in a reverse direction by entrapped fluid. In the prior art, entrapped fluid sometimes has driven the orbiting scroll in a reverse direction at shutdown, resulting in undesirable noise. The present invention stops movement of the orbiting scroll relative to the fixed scroll during reverse rotation by opening the fluid chambers dissipating that pressure.
Claims15
A scroll compressor comprising:
- a non-orbiting scroll having a base and a scroll wrap extending from said base;
- an orbiting scroll having a base and a scroll wrap extending from said base in a direction toward said base of said non-orbiting scroll, said wraps of said non-orbiting and orbiting scrolls interfitting to define compression chambers;
- a crank shaft having an eccentric for driving said orbiting scroll;
- a slider block positioned between said eccentric and said orbiting scroll, said slider block allowing said orbiting scroll to change an orbit radius and allow said orbiting scroll wrap to move into contact with said non-orbiting scroll wrap;
- and
- structure on said slider block and said eccentric to allow said orbiting scroll to move into contact with said non-orbiting scroll when said crank shaft is rotated in a first direction, but to prevent said orbiting scroll from moving into contact with said non-orbiting scroll if said crank shaft is rotated in a second direction opposed to said first direction under at least some operational speeds, said structure including an arc interface between said slider block and said eccentric which is in contact when said orbiting scroll is rotated in said first direction.
3 more elements
A scroll compressor comprising:
- a non-orbiting scroll having a base and a scroll wrap extending from said base;
- an orbiting scroll having a base and a scroll wrap extending from said base in a direction toward said base of said non-orbiting scroll, said wraps of said non-orbiting and orbiting scrolls interfitting to define compression chambers;
- a crank shaft having an eccentric for driving said orbiting scroll;
- a slider block positioned between said eccentric and said orbiting scroll, said slider block allowing said orbiting scroll to change an orbit radius and allow said orbiting scroll wrap to move into contact with said non-orbiting scroll wrap;
- and
- a stop surface formed within a bore in said slider block, there being a mating stop surface formed on an outer periphery of said eccentric, the stop surfaces on said eccentric and said slider block being out of contact with each other when said orbiting scroll is driven in a first direction, and said stop surfaces moving into contact with each other when said orbiting scroll is rotating in a second direction and at low speeds, said structure including an arc interface between said slider block and said eccentric which is in contact when said orbiting scroll is rotated in said first direction.
3 more elements
A scroll compressor comprising:
- a non-orbiting scroll having a base and a scroll wrap extending from said base;
- an orbiting scroll having a base and a scroll wrap extending from said base in a direction toward said base of said non-orbiting scroll, said wraps of said non-orbiting and orbiting scrolls interfitting to define compression chambers;
- a crank shaft having an eccentric for driving said orbiting scroll;
- a slider block positioned between said eccentric and said orbiting scroll, said slider block allowing said orbiting scroll to change an orbit radius and allow said orbiting scroll wrap to move into contact with said non-orbiting scroll wrap;
- and
- structure on said slider block and said eccentric to allow said orbiting scroll to move into contact with said non-orbiting scroll when said crank shaft is rotated in a first direction, but to prevent said orbiting scroll from moving into contact with said non-orbiting scroll if said crank shaft is rotated in a second direction opposed to said first direction under at least some operational speeds, said structure between said slider block and said eccentric including a flat surface formed on one of said slider block and said eccentric and an arc surface formed on the other of said slider block and said eccentric such that there is line contact between said arc surface and said flat surface.
3 more elements
A scroll compressor comprising:
- a non-orbiting scroll having a base and a scroll wrap extending from said base;
- an orbiting scroll having a base and a scroll wrap extending from said base in a direction toward said base of said non-orbiting scroll, said wraps of said non-orbiting and orbiting scrolls inter fitting to define compression chambers;
- a crank shaft having an eccentric for driving said orbiting scroll;
- a slider block positioned between said eccentric and said orbiting scroll, said slider block allowing said orbiting scroll to change an orbit radius and allow said orbiting scroll wrap to move into contact with said non-orbiting scroll wrap;
- and
- a stop surface formed within a bore in said slider block, there being a mating stop surface formed on an outer periphery of said eccentric, the stop surfaces on said eccentric and said slider block being out of contact with each other when said orbiting scroll is driven in a first direction, and said stop surfaces moving into contact with each other when said orbiting scroll is rotating in a second direction and at low speeds, said stop surface on said slider block including a flat surface formed adjacent to a cut away surface and said inner bore, and an arc formed on said outer periphery of said eccentric as said stop surface.
3 more elements
A scroll compressor comprising:
- a fixed scroll having a base and a scroll wrap extending from said base;
- an orbiting scroll having a base and a scroll wrap extending from said base in a direction toward said base of said fixed scroll, said wraps of said fixed and orbiting scrolls interfitting to define compression chambers;
- a crank shaft having an eccentric for driving said orbiting scroll;
- a slider block positioned between said eccentric and said orbiting scroll, said slider block allowing said orbiting scroll to change an orbit radius and allow said orbiting scroll wrap to move into contact with said fixed scroll wrap;
- and
- a stop surface formed within a bore in said slider block, there being a mating stop surface formed on an outer periphery of said eccentric, the stop surfaces on said eccentric and said slider block being out of contact with each other when said orbiting scroll is driven in a first direction, and said stop surfaces moving into contact with each other when said orbiting scroll is rotating in a second direction and at low speeds, said stop surfaces formed only over a portion of an axial length of said eccentric and said slider block.
3 more elements
Dependencies are inferred from the claim text.