Abstract:
Un compresor (10) que comprende: un alojamiento (12) que define una región de presión de succión y una región de presión de descarga (36); un primer miembro de desplazamiento (106) soportado en dicho alojamiento y que incluye una primera placa terminal (118), una primera envoltura en espiral (120) que se extiende desde un primer lado de dicha primera placa terminal, una primera cámara (145) ubicada en un segundo lado de dicha primera placa terminal que tiene el primer y el segundo pasaje (154, 152) en comunicación con la misma, y un primer orificio (148) que se extiende a través de dicha primera placa terminal y está en comunicación con dicha primera cámara; un segundo miembro de desplazamiento (104) soportado en dicho alojamiento y que incluye una segunda placa terminal (108) que tiene una segunda envoltura en espiral (110) que se extiende desde la misma y en un engranaje en enmallado con dicha primera envoltura en espiral para formar una serie de cavidades de compresión (122, 124, 126, 128, 130, 132), estando dicho primer orificio en comunicación con una de dichas cavidades de compresión para proporcionar comunicación entre dicha cavidad de compresión y dicha primera cámara; caracterizado porque hay un pistón (162) ubicado en dicha primera cámara y es desplazable axialmente entre la primera y la segunda posición, aislando dicho pistón dicho primer pasaje (154) de una comunicación con dicho segundo pasaje (152) cuando está en la primera y en la segunda posición, impidiendo dicho pistón (162) la comunicación entre dicho primer orificio (148) y dicho primer pasaje (154) cuando está en la primera posición, y proporcionando dicho pistón (162) una comunicación entre dicho primer orificio (148) y dicho primer pasaje (154) cuando está en la segunda posición.
Abstract:
A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region.
Abstract:
A compressor may include a fluid-injection source, a shell, and first and second scroll members. The shell may define a suction pressure region. The first scroll member may include a first end plate and a first scroll wrap extending therefrom. The second scroll member may include a second end plate and a second scroll wrap extending therefrom. The first and second scroll wraps may cooperate to define a plurality of fluid pockets. The second end plate may include a first passage and a second passage. The second end plate may also include a first port and a second port extending through the second end plate and communicating with at least one of the fluid pockets. The first passage may be in communication with the suction pressure region. The second passage may be in communication with the fluid-injection source.
Abstract:
Un compresor puede incluir un alojamiento, miembros de espiral orbitantes y no orbitantes, un primer conjunto de lumbreras y un segundo conjunto de lumbreras. El primer y segundo conjuntos de lumbreras cada uno puede extenderse a través de la placa extrema del miembro de espiral no orbitante y cada uno puede tener una extensión angular de por lo menos veinte grados. Un punto de finalización del primer conjunto de lumbreras puede separarse de manera rotacional de un punto de partida del primer conjunto de lumbreras por la extensión angular en una dirección rotacional de un árbol de transmisión del compresor. Un punto de finalización del segundo conjunto de lumbreras puede separarse de manera rotacional de un punto de partida del segundo conjunto de lumbreras por la extensión angular en una dirección rotacional opuesta a la dirección rotacional del árbol de transmisión. El punto de finalización del segundo conjunto de lumbreras puede separarse de manera rotacional del punto de partida del primer conjunto de lumbreras por menos de ciento ochenta grados en la dirección rotacional del árbol de transmisión.
Abstract:
A compressor may include a shell assembly defining suction and discharge pressure regions, first and second scroll members disposed within the shell assembly, and a capacity modulation assembly. The first scroll member may include a first end plate defining a discharge passage, a biasing passage, a modulation port, a first spiral wrap extending from a first side of the first end plate, and an annular hub extending from a second side of the first end plate. The second scroll member may include a second spiral wrap meshingly engaged with the first spiral wrap forming a suction pocket in communication with the suction pressure region, intermediate compression pockets, and a discharge pocket in communication with the discharge passage. A first intermediate compression pocket may be in communication with the biasing passage and a second intermediate compression pocket may be in communication with the modulation port.
Abstract:
A compressor includes orbiting and non-orbiting scroll members meshingly engaged to form a series of compression pockets, including first pockets when the orbiting scroll member is in a first position. A first porting in the non-orbiting scroll member communicates with the first pockets during a portion of a compression cycle. The first pockets include a set of radially outermost pockets located radially inward relative to the first porting and isolated from communication with the first porting during the compression cycle. The first porting is aligned with a spiral wrap of the orbiting scroll member at a location radially outward from and directly adjacent the first pockets when the orbiting scroll member is in the first position. Additional porting communicates with each of the compression pockets located radially outward relative to the first pockets when the orbiting scroll member is in the first position.
Abstract:
A compressor includes a first porting extending through an end plate of an orbiting scroll member at an angular extent of at least twenty degrees and first and second spiral wraps defining modulated capacity pockets when the orbiting scroll is in a first position. The first modulated capacity pockets may include a set of radially outermost compression pockets located radially inward relative to the first porting and isolated from communication with the first porting during an entirety of the compression cycle. The first porting may align with the second spiral wrap at a location radially outward from and directly adjacent the first modulated capacity pockets when the orbiting scroll member is in the first position.
Abstract:
A compressor may include first and second scroll members and first and second pistons. The first scroll member includes a first end plate and a first scroll wrap. The second scroll member includes a second end plate and a second scroll wrap that is intermeshed with the first scroll wrap to define moving fluid pockets. The second end plate may include a first and second passages, first and second recesses, and first and second ports extending through the second end plate and communicating with at least one of the pockets. The first piston may be disposed in the first recess and movable between first and second positions controlling communication between the first passage and the first port. The second piston may be disposed in the second recess and movable between first and second positions controlling communication between at least one of the pockets and said second passage.
Abstract:
A compressor includes orbiting and non-orbiting scrolls forming first and second fluid pockets therebetween. First and second ports are disposed in the non-orbiting scroll and radially spaced apart from each other. The first port communicates with the first pocket at a first radial position and the second port communicates with the second pocket at a second radial position. A blocking device is movable between a first position preventing communication between the ports and a fluid source and a second position allowing communication between the ports and the fluid source. The first and second pockets have first and second pressures, respectively. One of the pressures may have a disproportionate pressure change compared to the other of the pressures after at least one of the pockets communicates with the fluid source through at least one of the ports. The disproportionate pressure change biases the orbiting scroll relative to the non-orbiting scroll.
Abstract:
A compressor including a housing defining a suction pressure region and a discharge pressure region includes first and second scroll members forming compression pockets. A first chamber located on the first end plate of the first scroll member includes first and second passages and a first aperture extending therethrough and in communication with the first chamber. The first aperture provides communication between a compression pocket and the first chamber. A piston in the first chamber is axially displaceable to isolate the first passage from communication with the second passage when in first and second positions, prevent communication between the first aperture and the first passage when in the first position, and provide communication between the first aperture and the first passage when in the second position.