A refrigeration module of a cold space chamber has a blower and an evaporator. A method of controlling the refrigeration module includes defrosting a coil of the evaporator to form a volume of warm air surrounding the coil. The method includes circulating a refrigerant through the evaporator after defrosting the coil, to cool the coil. The method includes operating the blower in a series of pulses to control introduction of the volume of warm air into the cold space chamber.
F25D 21/00 - DégivragePrévention du givrageÉvacuation du condensat ou de l'eau de dégivrage
B01L 7/00 - Appareils de chauffage ou de refroidissementDispositifs d'isolation thermique
F25D 17/06 - Dispositions pour la circulation des fluides de refroidissementDispositions pour la circulation de gaz, p. ex. d'air, dans les enceintes refroidies pour la circulation de gaz, p. ex. convection naturelle par circulation d'air forcée
2.
COMPRESSOR CONTROL PROCESS FOR VARIABLE CASCADE REFRIGERATION SYSTEM
A method and apparatus for controlling compressors in a cascade vapor compression system. The process may include controlling the operation of a first compressor based on a constant band control, and controlling the operation of a second compressor based on a proportional band control. Controlling the first compressor based on the constant band control may include operating the compressor at a constant setting if first measurements are within a range associated with a first setpoint. It may also include proportionally adjusting the operation of the first compressor if the first measurements are outside the range. Further, controlling the second compressor based on the proportional band control may include operating the compressor based on one of a plurality of proportional bands, each proportional band having a different proportional factor. Controlling the second compressor operation may further include switching between these proportional bands based on a second measured parameter.
F25B 49/02 - Disposition ou montage des dispositifs de commande ou de sécurité pour machines, installations ou systèmes du type à compression
F25B 7/00 - Machines, installations ou systèmes à compression fonctionnant en cascade, c.-à-d. avec plusieurs circuits, l'évaporateur d'un circuit refroidissant le condenseur du circuit suivant
An embodiment of a cold storage system includes a housing further including a chamber having a front opening closeable by an outer door and a back wall opposite the front opening, one or more outlets defined in the back wall, and one or more inlets defined in the chamber more proximate the front opening than the back wall. In addition, the cold storage system includes a refrigeration module operably coupled to the chamber. The refrigeration module includes an evaporator positioned vertically higher than the chamber, a blower configured to generate an airflow that is in thermal communication with the evaporator, and ducting configured to circulate the airflow between the chamber and the evaporator via the inlets and the outlets such that the airflow is directed through the outlets into the chamber and then from the chamber into the inlets to cool the chamber.
F25D 17/08 - Dispositions pour la circulation des fluides de refroidissementDispositions pour la circulation de gaz, p. ex. d'air, dans les enceintes refroidies pour la circulation de gaz, p. ex. convection naturelle par circulation d'air forcée en utilisant des conduits
F25D 17/06 - Dispositions pour la circulation des fluides de refroidissementDispositions pour la circulation de gaz, p. ex. d'air, dans les enceintes refroidies pour la circulation de gaz, p. ex. convection naturelle par circulation d'air forcée
An embodiment of a system for changing a temperature of a packaged biologic substance includes a chamber configured to receive the packaged biologic substance. In addition, the system includes a refrigeration assembly configured to change a temperature of the packaged biologic substance. Further, the system includes an auxiliary heat exchanger at least partially positioned in the chamber, the auxiliary heat exchanger including at least one heat pipe.
F28D 15/02 - Appareils échangeurs de chaleur dans lesquels l'agent intermédiaire de transfert de chaleur en tubes fermés passe dans ou à travers les parois des canalisations dans lesquels l'agent se condense et s'évapore, p. ex. tubes caloporteurs
F25B 21/02 - Machines, installations ou systèmes utilisant des effets électriques ou magnétiques utilisant l'effet PeltierMachines, installations ou systèmes utilisant des effets électriques ou magnétiques utilisant l'effet Nernst-Ettinghausen
5.
System and method of hot gas defrost control for multistage cascade refrigeration system
The present invention provides a system and method for an improved multistage, cascade refrigeration system using hot gas defrost to rid the evaporator of ice build-up which accumulates over time, while the air in the evaporator enclosure remains below the freezing point of water. The present invention thus provides greater defrost flexibility with increased ease of design and implementation than current refrigeration systems, which allows for more robust hot gas defrost function for multistage refrigeration systems, such that it is unaffected by temperature changes of the condensing fluid (ambient air temperature for air cooled condensers, water temperature for water cooled condensers), and can be readily adapted to any refrigerant suitable for a selected temperature range.
F25B 7/00 - Machines, installations ou systèmes à compression fonctionnant en cascade, c.-à-d. avec plusieurs circuits, l'évaporateur d'un circuit refroidissant le condenseur du circuit suivant
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Freezers; Refrigerators; Refrigeration systems consisting of refrigerators, refrigerating cabinets; Temperature-controlled refrigerating chambers; convection cooling units and convection heaters; Refrigerators for laboratory use; Freezers for laboratory use; Heating devices for thawing stored biologic and pharmaceutical products Installation, maintenance and repair of non-residential refrigeration systems Engineering and Design of custom temperature-controlled chambers; Remote monitoring of temperature-controlled chambers
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Freezers; Refrigerators; Refrigeration systems consisting of refrigerators, refrigerating cabinets; Temperature-controlled refrigerating chambers; convection cooling units and convection heaters; Refrigerators for laboratory use; Freezers for laboratory use; Heating devices for thawing stored biologic and pharmaceutical products Installation, maintenance and repair of non-residential refrigeration systems Engineering and Design of custom temperature-controlled chambers; Remote monitoring of temperature and equipment status in temperature-controlled chambers
The present invention provides a system and method for an improved multistage, cascade refrigeration system using hot gas defrost to rid the evaporator of ice build-up which accumulates over time, while the air in the evaporator enclosure remains below the freezing point of water. The present invention thus provides greater defrost flexibility with increased ease of design and implementation than current refrigeration systems, which allows for more robust hot gas defrost function for multistage refrigeration systems, such that it is unaffected by temperature changes of the condensing fluid (ambient air temperature for air cooled condensers, water temperature for water cooled condensers), and can be readily adapted to any refrigerant suitable for a selected temperature range.
F25B 7/00 - Machines, installations ou systèmes à compression fonctionnant en cascade, c.-à-d. avec plusieurs circuits, l'évaporateur d'un circuit refroidissant le condenseur du circuit suivant
F25B 41/345 - Soupapes de détente l’organe de soupape étant actionné par des moyens électriques, p. ex. par des actionneurs piézo-électriques par des électro-aimants
F25B 41/385 - Dispositions avec plusieurs moyens de détente disposés en parallèle sur une conduite de réfrigérant menant au même évaporateur
