Abstract:
A freezer includes a housing having a sidewall defining a chamber, and an inlet and an outlet in communication with the chamber; a pair of baffle assemblies spaced apart and disposed in the chamber, a first one of the pair movable 90° degrees out of phase from a second one of the pair; a plate disposed in the chamber and extending between the first and second baffle assemblies for dividing a portion of the chamber into an intake zone and an outflow zone; a fan disposed in the chamber between the first and second baffle assemblies and in communication with the intake and outflow zones for providing a gas flow from the intake zone to the outflow zone; and a delivery apparatus in communication with the chamber for delivering a chilling substance to the chamber for reducing a temperature of a product. A method is also provided.
Abstract:
A method for operating a vehicle that provides refrigeration and is powered by an engine for burning liquefied natural gas. The vehicle contains on-board storage tanks for liquefied natural gas and liquid nitrogen. These two tanks are in thermal communication with each other and natural gas from the liquefied natural gas storage tank will periodically contact the liquid nitrogen and return as liquefied natural gas.
Abstract:
A heat transfer apparatus for a product includes a housing having an internal chamber; a solid conveyor belt disposed within the internal chamber and arranged in a spiral configuration having upper and lower portions, the spiral configuration including an upper pathway within the upper portion, a lower pathway within the lower portion; a gas flow having an upper gas flow across the upper pathway, a lower gas flow across the lower pathway and in counter-flow to the upper gas flow, wherein the upper gas flow and the lower gas flow define a circulation loop; and a gas circulation device to induce the upper and lower gas flows along the circulation loop.
Abstract:
A conveyor belt includes a conveying surface comprising a plurality of rod-shaped members each of which is constructed and arranged for vertical displacement with respect to each other for providing a space between adjacent ones of the plurality of rod-like members. The conveyor belt may also include a side link disposed at opposed ends of each one of the plurality of rod-shaped members, each one of the side links having at least one central aperture therein for receiving a corresponding end of the rod-shaped member for vertical displacement therein.
Abstract:
A freezer for reducing the temperature of product is provided which includes a controller in communication with and for receiving signals from the cryogen delivery assembly, the cryogen flow assembly, the conveyor, the product measurement assembly and the first heat sensor, the controller responsive to the signals for controlling the cryogen flow assembly to provide an amount of the cryogen to the cryogen delivery assembly for application to the product.
Abstract:
An apparatus for reducing a temperature of a product includes a housing in which cryogenic fluid is provided for being exposed to the product, and at least one ultrasonic transducer assembly disposed in the housing for generating ultrasonic energy to contact the cryogenic fluid and a surface of the product to facilitate heat transfer at the surface of the product. The cryogenic fluid can be selected from nitrogen and carbon dioxide.
Abstract:
A self-chilling container, including an outer wall and an inner wall defining at least one adsorption chamber in a space provided between the outer wall and the inner wall, the adsorption chamber adapted to contain adsorbent material in heat transfer contact with at least the inner wall; the inner wall further defining at least one cooling chamber adjacent to the adsorption chamber, the cooling chamber being in heat transfer contact with the inner wall; at least one inlet disposed at the outer wall for introduction of a gas subliming solid material into the adsorption chamber for adsorption of sublimed gas onto the adsorbent material; and a valve in communication with the adsorption chamber for controlled release of the gas from the adsorption chamber.
Abstract:
An apparatus and method for surface crust freezing of a food product utilizes a refrigeration shell enclosing a freezing chamber, the freezing chamber having a cavity shaped to substantially accommodate the shape of the exterior surface of the food product; the cavity communicating with the refrigeration shell; a transport substrate to carry the food product into the freezing chamber; a cryogen supply; and a gas circulation device in the refrigeration shell in communication with the cryogen supply to introduce a cooling flow of gas containing cryogen into the cavity so as to contact the food product along its exterior surface.
Abstract:
An apparatus and method are provided for mixing a gas and a liquid to produce a gaseous vapor of the liquid that is substantially free of droplets. Gas, e.g., carbon dioxide, is divided into first and second streams. The first stream is combined in an atomization zone with the liquid, e.g., acetic acid, to form an atomized mixture of the gas and liquid. This atomized mixture is then contacted with the second gas stream in a mixing zone within a mixing/separation chamber in which the second gas stream vaporizes substantially all of the atomized liquid, and the resulting mixture of gas, vaporized liquid and residual droplets moves to the separation zone of the mixing/separation chamber. In the separation zone, the residual droplets gravitationally separate from the vaporized mixture, and the vaporized mixture free of a substantial amount of residual droplets is removed from the chamber. A vaporized mixture of carbon dioxide and acetic acid is useful as, among other things, a preservative for perishable products, e.g., baked goods.
Abstract:
An apparatus and method for surface crust freezing of a food product utilizes a refrigeration shell enclosing a freezing chamber, the freezing chamber having a cavity shaped to substantially accommodate the shape of the exterior surface of the food product; the cavity communicating with the refrigeration shell; a transport substrate to carry the food product into the freezing chamber; a cryogen supply; and a gas circulation device in the refrigeration shell in communication with the cryogen supply to introduce a cooling flow of gas containing cryogen into the cavity so as to contact the food product along its exterior surface.