The present invention provides a refrigerator which shortens the time of passing through a maximum ice crystal generation zone by efficiently blowing cold air to an object to be frozen. With respect to the refrigerator according to the present invention, the upper portion of the upper freezing compartment is provided with: a first supply air duct for supplying cold air during normal cooling operation; and a second supply air duct for supplying cold air during rapid cooling operation. During rapid cooling operation, the blower is operated, and the cold air supplied from the supply air duct is supplied to the upper freezing compartment via the second supply air duct and the air outlet.

A cryogenic preservation or vitrification device that has an accumulator including a first volume of pressurised hydraulic oil; a control system controlling a valve capable of releasing a second volume of hydraulic oil from the accumulator toward a cylinder by use of a pipe; and a cylinder including a piston configured to be driven by the second volume of hydraulic oil and to displace a first volume of cryogenic fluid to a cryogenic vessel intended to receive a sample to be cryogenically preserved.

The invention relates to a method and associated equipment for obtaining a product in the form of deep-frozen, dissolved-gas-rich granules, particles or beads from a liquid, semi-liquid or pasty matrix (2), comprising the following steps: gasification of the matrix (2) by incorporating a gas; dispensing the matrix (2) in the form of drops; and cryogenically freezing the matrix drops by immersion in a cryogenic fluid (70), the step of gasification of the matrix (2) involving dissolving a large amount of the gas generated by the evaporation of the cryogenic fluid in the drops by increasing the number of gas molecules in a high gas density zone, called high molecular density zone, located above the surface of the cryogenic fluid and on the path of the matrix drops before they are immersed in the fluid.

The invention discloses a nozzle structure for a quick freezer, including a plurality of conical diversion channels, a plurality of jet channel, a plurality of hemispherical nozzles and a steel belt. The nozzle structure is a funnel-shaped structure formed by the conical diversion channel, the jet channel and the hemispherical nozzle. The nozzle structure of the present invention can effectively improve flow area at the cross-flow direction, and a fluid buffer area is formed between two adjacent nozzles, which can reduce the cross-flow effect, and improve the heat exchange rate of the surface of the steel belt, thereby reducing the freezing time of food, improving the freezing efficiency of the quick freezer, and reducing the energy consumption.

Dry ice cooling systems and methods of making dry ice cooling systems are disclosed. According to embodiments, dry ice cooling systems include a compression container including compressed liquid carbon dioxide. The dry ice cooling systems include a dry ice container coupled to the compression container to receive the liquid carbon dioxide and house dry ice as it forms. The dry ice container includes a liquid coolant. Further, the dry ice cooling system includes a heat exchanger to couple a heat-generating source to the dry ice container.

An instant freezer apparatus able to freeze consumable fluids and food having a freezing point lower than water is disclosed. The apparatus and method of the present invention is directed to a freezer typically able to instantly freeze consumable fluids and food without altering their chemical compositions. The instant freezer apparatus generally comprises a main frame and a removable freezing module. The apparatus may further comprise a freezing fluid injection system such as a liquid carbon dioxide tank or a liquid nitrogen tank fluidly connected to the main frame. At least two freezing cells comprising the fluid to be frozen may be included, the freezing cells being independently removable from the freezing module and other freezing cells. A semi-flexible mat for receiving and supporting varying shapes of freezing cells may be included.

This invention is Central refrigerator and freezer up to 360° access and view, polygonal and circular, rotary and mobile both manually and electrically by remote control, equipped with water and battery storage reservoir in the upper part of central cylinder, with smart digital system connected to internal and external cameras with the capability to send and receive messages and images to and from owner and/or near stores and connected to the network for smart shopping, with remote control and satellite telephones and the possibility for consumer to access from all sides instead of limited access from one side. This invention is in the field of mechanical engineering with a new model of a unit comprising of cooling, cool-maintaining and freezing plus fast freezing systems for food materials plus cold and hot water for tea and coffee maker and ice maker and equipped to microwave for cooking food.

A refrigerator or freezer device at a refrigerator or freezer (1) having, a house (3), fan devices (4), refrigeration or freezing aggregates (5), a perforated trough bottom assembly (2), an inlet (6) and an outlet (7) where the perforated trough bottom assembly (2) can include a first perforated trough bottom part (2b) and a second perforated trough bottom part (2a), where the first part and second part are subjected to the action of the fan devices (4) and the refrigeration or freezing aggregates (5) and the first part (2b) of said perforated trough bottom assembly (2) next to the inlet (6) is heated so that food materials are prevented from being stuck to the perforated trough bottom assembly (2).

A Transport Refrigeration Unit (TRU) includes one or more evaporators inside the TRU each containing two manifold tubes located at opposite ends of the evaporator and a multiplicity of cooling tubes traversing between the manifold tubes; one or more super-insulated vacuum tanks located in front of, beneath or inside the TRU, filled with liquid nitrogen, carbon dioxide or a cryogenic coolant connected to the one or more evaporators using vacuum-insulated pipes; a solenoid or pneumatic valve located upstream or downstream of the evaporator to meter a flow of nitrogen through the evaporator; a temperature controlling circuit that operates the solenoid or pneumatic valve; a flow restricting device that limits the flow of the cryogenic coolant through the evaporator; a vent pipe to vent the spent coolant outside the TRU; and a multiplicity of fans located adjacent to and above the evaporators that distribute the cooled air uniformly throughout the TRU.

A blast cell system is provided with simple and scalable designs that prevent short cycling of air flow through any pallets in blast cells. The blast cell includes a plurality of suction channels that provide independent fluid pathways for directing the air drawn from different rows in the blast cell into the fan.