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。

公开(公告)号：US4953365A

公开(公告)日：1990-09-04

申请号：US373056

申请日：1989-06-28

Applicant: Gary D. Lang ,  Donald S. Finan ,  George D. Rhoades

Inventor： Gary D. Lang ,  Donald S. Finan ,  George D. Rhoades

IPC: A23L3/36 ,  F25D3/11 ,  F25D13/06 ,  F25D25/04

CPC classification number: A23L3/361 ,  F25D13/067 ,  F25D25/04 ,  F25D3/11 ,  B65G2207/24

Abstract: A food freezer having a thermally insulated enclosure wherein an endless conveyor having a lower loading section, a main helical section and an uppermost unloading section is primarily driven by engagement between its inner edge and the sidewall of a rotatable center cage, which includes a plurality of uniformly spaced apart vertical bars. The lower end of the center cage can be blocked, and a centrifugal blower is axially located at the upper end of the cage to suck gas from the interior of the cage and discharge it horizontally outward along the undersurface of the top wall so that it flows outward, then downward and, finally, radially inward in an overall generally toroidal pattern through the tiers of the helical belt section where it withdraws heat from the freezes the food products being carried therealong. Various arrangements, e.g., adjustable restrictors, are illustrated for creating vertical gradients in the radial inflow of gas through the helical section so that the cold gas flows inward at a greater rate in lower regions of the helical section than in the upper region. Cryogen injection devices for spraying a cryogen, such as liquid CO.sub.2 or liquid N.sub.2, radially inward to impinge upon the food products on the belt, may be located at selected positions about the perimeter and at various vertical levels. Radial inflow of gas adds to the effectiveness of the impinging spray against the food products; however, the overall freezer construction is also advantageously employed with mechanical cooling of the gaseous atmosphere via one or more heat exchange coils.

Abstract translation: 一种具有绝热外壳的食品冷冻机，其中具有下加载部分，主螺旋部分和最上部卸载部分的环形输送机主要由其内边缘和可旋转中心保持架的侧壁之间的接合驱动，其包括多个 均匀分隔的垂直条。 中心笼的下端可以被阻挡，离心鼓风机轴向位于保持架的上端，以从笼的内部吸入气体并沿着顶壁的下表面向外水平地排出，使其流动 向外，然后向下并且最后径向向内，通过螺旋带部分的各层，其中其从其中抽出热量使其沿着被携带的食品冷冻。 示出了各种布置，例如可调节的限制器，用于在通过螺旋部分的气体的径向流入中产生垂直梯度，使得冷气体在螺旋部分的下部区域中以比在上部区域更低的速度向内流动。 用于喷射冷却剂（例如液体CO 2或液体N 2）径向向内以撞击在带上的食品的低温注射装置可以位于围绕周边和各种垂直水平的选定位置。 气体的径向流入增加了对食品的冲击喷雾的有效性; 然而，整体冷冻结构也有利地用于经由一个或多个热交换盘管的气态气氛的机械冷却。

公开(公告)号：US4739623A

公开(公告)日：1988-04-26

申请号：US61676

申请日：1987-06-11

Applicant: Lewis Tyree, Jr. ,  Martin M. Reynolds ,  Gary D. Lang

Inventor： Lewis Tyree, Jr. ,  Martin M. Reynolds ,  Gary D. Lang

IPC: F25D3/11 ,  F25D13/06

CPC classification number: F25D3/11 ,  B65G2207/24

Abstract: A cabinet freezer efficiently utilizes a liquid cryogen refrigerant in conjunction with a spiral conveyor which conveys a product load through a temperature gradient within the freezer. The freezer has a lower inlet and an upper outlet for the conveyor and food load thereon. The escape of cryogen vapors created in the freezer from the liquid cryogen is controlled such that at least about 80% of the vapors exit through the upper outlet which is at the warmest zone established as a part of the temperature gradient in the freezer.

Abstract translation: 机柜式冷冻机有效地利用液体冷冻剂制冷剂与螺旋输送机结合，该输送机将产品负载通过冷冻器内的温度梯度。 冷冻器具有用于输送机的下入口和上出口，并且其上具有食物负载。 控制在冷冻器中从液体冷冻剂中产生的冷冻剂蒸气的逸出，使得至少约80％的蒸气通过作为冷冻器中温度梯度的一部分建立的最高温区域的上部出口排出。