公开(公告)号：US4947654A

公开(公告)日：1990-08-14

申请号：US444015

申请日：1989-11-30

Applicant: Brian Evan Sink ,  Gary D. Lang ,  Benjamin Zyer

Inventor： Brian Evan Sink ,  Gary D. Lang ,  Benjamin Zyer

IPC: F25D3/11

CPC classification number: F25D3/11 ,  B65G2207/24

Abstract: A cryogenic freezer apparatus for food products includes a conveyor within a thermally insulated enclosure. A cryogen injecting unit is located in said enclosure adjacent the opening thereof, and responsive to a cryogen control signal for introducing liquid cryogen in said enclosure. A blower unit in said enclosure directs cryogen vapor away from said enclosure opening toward the interior of said enclosure. The output of said blower unit being controllable by a blower control signal. A sensing unit within said enclosure senses the cooling capacity of the cryogen vapor at the enclosure opening and generates a sensor output signal which is indicative of the amount of cryogen vapor escaping out of said opening. A control unit, coupled to said sensing unit, said injecting unit, and to said blower unit generates a cryogen control signal and a blower control signal in response to the sensor output signal. Cryogen vapor escaping from the enclosure is limited to an amount needed to maintain an air lock, thus preventing air intrusion into the enclosure.

Abstract translation: 用于食品的低温冷冻装置包括在绝热外壳内的输送机。 冷却剂注入单元位于邻近其开口的所述外壳中，并响应于用于将液体冷冻剂引入所述​​外壳中的冷冻剂控制信号。 所述外壳中的鼓风机单元将冷冻剂蒸汽远离所述外壳开口朝向所述外壳的内部。 所述鼓风机单元的输出由鼓风机控制信号控制。 所述外壳内的感测单元感测在外壳开口处的冷冻剂蒸汽的冷却能力，并且产生一个传感器输出信号，该信号指示从所述开口排出的冷冻剂蒸汽的量。 耦合到所述感测单元，所述注入单元和所述鼓风机单元的控制单元响应于传感器输出信号产生冷冻剂控制信号和鼓风机控制信号。 从外壳逸出的低温蒸汽被限制在维持气锁所需的量，从而防止空气侵入外壳。

公开(公告)号：US4955206A

公开(公告)日：1990-09-11

申请号：US443903

申请日：1989-11-30

Applicant: Gary D. Lang ,  Benjamin Zyer

Inventor： Gary D. Lang ,  Benjamin Zyer

IPC: F25D3/11 ,  F25D29/00

CPC classification number: F25D29/001 ,  F25D3/11

Abstract: A cryogenic freezer apparatus for food products, including a thermally insulated enclosure and conveyor means for conveying products through the enclosure. A cryogen unit in the enclosure produces cryogen vapor near the enclosure entrance, and a blower unit is located in the enclosure adjacent the entrance thereof. The blower unit is selectively reconfigurable in response to a blower control signal to selectively direct cryogen vapor in varying directions, drawing cryogen vapor away from a first portion of the enclosure and blowing cryogen vapor toward a second portion of the enclosure. A photocell unit outside the enclosure, adjacent the entrance thereof, detects cryogen vapor exiting the enclosure entrance and generates at least one sensor output signal in response thereto, being indicative of the amount of cryogen vapor exiting. A control unit is coupled to the photocell unit and to the blower unit for generating a blower control signal in response to the sensor output signal so that, with increasing vapor detected outside the entrance of the enclosure, the blower unit draws cryogen vapor away from the enclosure entrance. Also, upon detecting a decreasing amount of cryogen vapor exiting from the entrance of the enclosure, the blower unit directs less cryogen vapor away from the enclosure entrance to assure that intrusion of the ambient environment through the enclosure entrance is prevented.

Abstract translation: 一种用于食品的低温冷冻装置，包括隔热外壳和用于通过外壳输送产品的输送装置。 外壳中的冷冻剂单元在外壳入口附近产生冷冻剂蒸汽，并且鼓风机单元位于与其入口相邻的外壳中。 鼓风机单元响应于鼓风机控制信号而选择性地可重新配置，以选择性地在不同的方向上引导低温蒸汽，将冷冻剂蒸气从壳体的第一部分抽出，并将冷冻剂蒸气朝向外壳的第二部分吹送。 外壳外部的光电池单元在其入口附近，检测出离开外壳入口的冷冻剂蒸气，并产生响应于此的至少一个传感器输出信号，指示出现的冷冻剂蒸气的量。 控制单元耦合到光电管单元和鼓风机单元，用于响应于传感器输出信号产生鼓风机控制信号，使得随着在外壳入口外部检测到增加的蒸汽，鼓风机单元将冷却剂蒸气从 外壳入口。 此外，在检测到从外壳的入口排出的低温冷凝物的量减少时，鼓风机单元将较少的冷冻剂蒸气引导离开外壳入口，以确保防止周围环境侵入外壳入口。