摘要:
A food freezer for continuous freezing of food products utilizing a helical conveyor for transporting the food products through an enclosure having a first cooling zone in which the food products are cooled sufficiently to freeze the exterior surface, and a second cooling zone in which the interior of the food products are frozen. Refrigeration apparatus cools an atmosphere gas within the enclosure and baffle means directs the coldest gas through the food products in the first cooling zone and the gas from the first cooling zone is circulated to the second cooling zone where it passes across the food products in a direction opposite to the direction of travel through the second cooling zone.
摘要:
An apparatus for freezing foodstuffs includes a drum 1 mounted for rotary movement at an angle to the horizontal such that individual compartments 12 in the drum 1 successively descend into and rise from a vessel 11 containing cryogenic fluid. Frozen products tumble under gravity towards a central outlet 5 in one surface 4 of the drum, guided by the curved partitions 14 defining individual compartments 12.
摘要:
An apparatus for chilling and shrinking workpieces being conveyed to a workstation on an assembly line comprises, a chilling chamber, a conveyer for transporting workpieces, at least one generally vertical conduit for transporting cryogenic liquid out of a bath to an outlet above the bath, wells for storing cryogenic fluid bath, baffles for slowing the counterflow of cryogenic vapor and a lid for maintaining vapor in the chilling chamber. The workpieces first go through the pre-cooling process where cryogenic vapor flows in a counterflow to chill the workpieces. The workpieces move through openings in the baffles, and after the pre-cooling process, the conveyer transports the workpieces to the cooling stage where baths of cryogenic liquid are stored in wells. Generally vertical conduits are immersed in the wells. The density of cryogenic fluid in the conduit is reduced by warm vapor, enabling the cryogen to flow up the conduit. Cryogen reaching the outlet above the bath is sprayed onto workpieces transported by the conveyer. Cryogenic vapor resulted from the spraying flows to the pre-cooling section where it forms the counterflow discussed above.
摘要:
An apparatus for continuous freezing or heating process for multistage changing of the ambient temperature, in particular, an apparatus for a continuous freezing process, a freezing control method, and an apparatus for preparing a recording medium on which a program for the control method is written are disclosed.
摘要:
A method and apparatus for balancing the discharge of liquified gases from a multi-orifice manifold. The manifold includes at least one main conduit each having a central axis, and two or more discharge conduits each having a central axis. Each discharge conduit projects from the main conduit in a manner whereby the central axis of each discharge conduit extends from the central axis of the main conduit. The discharge conduits are positioned about the central axis of the main conduit such that each central axis of a discharge conduit provides with respect to a substantially horizontal plane passing through the central axis of the main conduit, an included angle in the range of about -30.degree. to about -60.degree. relative to the horizontal plane. A discharge orifice is attached to each discharge conduit and is oriented to provide downward discharge.
摘要:
A process and apparatus for extracting musts from fruit by rapid cooling said fruit to a temperature below 0.degree. C. followed by homogenizing the temperature of batches of said fruit prior to processing. The apparatus includes a cryogenic tunnel freezer in combination with a homogenizing/discharge hopper with refrigeration provided by a liquid cryogen such as nitrogen.
摘要:
A linear freezer for cooling and/or chilling and/or crust freezing and/or freezing various products, said freezer using carbon dioxide or nitrogen. The freezer comprises means to balance the exhausted cold gas between the entry and exit openings and sucking means, to extract the exhausted cold gas at said both entry and exit openings, with no substantial variation of flowrate of the exhausted cold gas than that generated from the enclosure without said sucking means.
摘要:
Method and apparatus for controlling gaseous cryogen flow through a continuous tunnel type freezer wherein the cryogen and product to be frozen travel in counterflow heat exchange relation to minimize egress of cryogen from, or ingress of ambient air into the product discharge opening in the freezer.
摘要:
A cryogenic freezer having a thermally insulated tunnel-like enclosure with an entrance and an exit and means for conveying products being frozen therethrough. Products are contacted with liquid cryogen at a region generally near the entrance and a blower located closer to the entrance than to the exit controls flow of cryogen vapor. Upstream and downstream baffles and dampers associated with blower are linked together for complementary movement to selectively regulate the upstream and downstream flow of vapor discharged from the blower. Additional blowers circulate the cold cryogenic vapor transverse to the direction of the conveying means. The temperature of vapor leaving the region of the entrance is monitored the orientation of the baffle and damper arrangement is adjusted in accordance with the temperature monitored. The food products can be contacted by liquid nitrogen in a reservoir facilitates cleaning and retards inefficient vaporization.
摘要:
A food freezing tunnel has a trough member and a roof member. In order to gain access to the interior of the tunnel, for example for purposes of cleaning the tunnel, the trough member is able to be raised and lowered. Jack means housed in the respective legs of the tunnel are driven by for example an electric motor to lower and raise the tunnel. The trough has counterweights. Typically the jack includes a rotary screw-threaded shaft which carry a nut connected to a chain which travels over pulleys and which is secured to the trough member.