Abstract:
Ce compresseur comprend une volute fixe (3) et une volute mobile (6) décrivant un mouvement orbital par rapport à la volute fixe, les volutes fixe et mobile (3, 6) étant chacune équipées d'une spirale (5, 8), les deux spirales étant engagées l'une dans l'autre et délimitant des chambres de compression de volume variable, seule la spirale (8) de la volute mobile comprenant une surélévation (12) s'étendant sur au moins une portion de sa longueur. Au moins l'une des volutes (3, 6) comprend au moins un canal agencé pour mettre en communication, au cours du mouvement orbital de la volute mobile, deux chambres de compression, les extrémités du canal débouchant respectivement de part et d'autre des parois extérieure et intérieure de la spirale de la volute comprenant le canal ou dans les parois extérieure et intérieure de la spirale de la volute comprenant le canal. Le canal comprend un clapet anti-retour agencé pour permettre un passage de fluide uniquement de la paroi extérieure de la spirale de la volute comprenant le canal vers la paroi intérieure de celle-ci.
Abstract:
Ce compresseur frigorifique comprend une enceinte étanche délimitant un volume d'aspiration et un volume de compression disposés respectivement de part et d'autre d'un corps (5) contenu dans l'enceinte, et un circuit d'injection d'huile agencé pour injecter de l'huile dans le volume de compression. Le circuit d'injection d'huile comprend un obturateur (26) mobile, sous l'effet d'une force centrifuge, entre une première position permettant une injection d'huile dans le volume de compression et une seconde position empêchant ou limitant l'injection d'huile dans le volume de compression, l'obturateur (26) étant agencé pour se déplacer dans sa seconde position lorsque la vitesse du compresseur dépasse une valeur prédéterminée.
Abstract:
Compresseur frigorifique à spirales, comprenant une enceinte étanche délimitée par une virole (2) et contenant un volume d'aspiration et un volume de compression, un moteur électrique disposé du côté de l'aspiration ayant un stator (7) et un rotor (8), solidaire d'un arbre d'entraînement (26). Le stator (7) est entouré par une enveloppe intermédiaire (6) délimitant d'une part un volume annulaire (13) avec la virole mobile (2) du compresseur et d'autre part une chambre (11) contenant la tête de bobine du moteur et tournée du côté du volume de compression, l'extrémité de l'enveloppe intermédiaire tournée du côté opposé au volume de compression étant située au niveau de l'extrémité du stator tournée du côté opposé au volume de compression ou en retrait de cette dernière, des moyens (14) étant prévus pour amener au moins une partie du gaz arrivant à l'entrée de gaz ménagée dans la virole, dans la chambre (11) contenant la tête de bobine.
Abstract:
Device (7) for distributing suction gas for a parallel compressor (2) installation, said installation having at least two refrigeration compressors (2), at least one oil level equalization tube (5) providing a communication between the oil pans (6) provided in the bodies (3) of the compressors (2), at least one suction gas distribution device (7) comprising an essentially straight distribution tube (8), and branch tubes (9, 10). The branch tubes (9, 10) have at least one portion (12) forming an angle of between 55° and 65° with the axis of the distribution tube (8). The present invention uses a special geometry for equalizing the pressures in the oil pans of each compressor and thus using simple equalization channels.
Abstract:
The invention relates to a scroll-type refrigerant compressor. The inventive compressor includes a drive shaft (26) comprising an off-axis lubrication conduit (35) which is supplied with oil from an oil pan (31) located in the lower part of the compressor by means of an oil pump (34) that is disposed at a first end of the shaft. The lubrication conduit comprises lubrication holes (36) at the different shaft guide bearings. The second end of the shaft is equipped with a device that enables the orbital movement of the moving scroll of the compressor. The aforementioned shaft also comprises a return conduit (37) which is inclined in relation to the axis of the shaft and which extends over at least part of the length thereof. One of the ends of the return conduit opens at the wall of the shaft in the area located beyond the rotor on the side of the oil pan. In addition, fluid communication means (38, 39) are provided between the lubrication conduit and the return conduit.
Abstract:
The invention relates to a refrigeration compressor having a sealed housing defining a suction volume and a compression volume respectively provided on either side of a body (5) contained in the housing, and an oil injection circuit adapted for injecting oil into the compression volume. The oil injection circuit includes a stopper (26) mobile under the action of a centrifugal force between a first position for injecting oil into the compression volume and a second position preventing or limiting the injection of oil into the compression volume, wherein the stopper (26) is adapted so as to move into the second position when the speed of the compressor exceeds a predetermined value.
Abstract:
The invention relates to a cooling system and a heat pump unit including such a system. Said refrigeration system includes a main circuit (2) for circulating a refrigerant, comprising a condenser (4), an expansion valve (5), an evaporator (6) and a compressor (3) connected in series, a refrigerant injection circuit (7) designed to enable the refrigerant taken from the main circuit to be injected into at least one compression chamber of the compressor, a means (8, 9) for measuring the temperature and delivery pressure of the compressor, and a regulation means (11) coupled with the injection circuit and designed such as to regulate the amount of refrigerant injected into the compressor, the regulation means including a blocking means movable between open and closed positions of the injection circuit, and a control means (12) designed for controlling the movements of the blocking means between the open and closed positions thereof according to the temperatures and pressures measured by the measurement means.
Abstract:
The invention relates to a refrigeration compressor having a sealed housing defining a suction volume and a compression volume respectively provided on either side of a body (5) contained in the housing, and an oil injection circuit adapted for injecting oil into the compression volume. The oil injection circuit includes a stopper (26) mobile under the action of a centrifugal force between a first position for injecting oil into the compression volume and a second position preventing or limiting the injection of oil into the compression volume, wherein the stopper (26) is adapted so as to move into the second position when the speed of the compressor exceeds a predetermined value.
Abstract:
Device (7) for distributing suction gas for a parallel compressor (2) installation, said installation having at least two refrigeration compressors (2), at least one oil level equalization tube (5) providing a communication between the oil pans (6) provided in the bodies (3) of the compressors (2), at least one suction gas distribution device (7) comprising an essentially straight distribution tube (8), and branch tubes (9, 10). The branch tubes (9, 10) have at least one portion (12) forming an angle of between 55° and 65° with the axis of the distribution tube (8). The present invention uses a special geometry for equalizing the pressures in the oil pans of each compressor and thus using simple equalization channels.