Refrigeration apparatus and method of refrigeration
    3.
    发明授权
    Refrigeration apparatus and method of refrigeration 失效
    制冷装置及制冷方法

    公开(公告)号:US5331824A

    公开(公告)日:1994-07-26

    申请号:US979572

    申请日:1992-11-20

    IPC分类号: F25D16/00 F25B1/00

    CPC分类号: F25D16/00

    摘要: Supplementary cooling for a mechanical refrigeration plant using ammonia as a refrigerant is provided by placing a tube in the vapor space of a buffer vessel and introducing liquid nitrogen into the tube. Although ammonia solidifies at -78.degree. C. and liquid nitrogen enters the tube at -196.degree. C. no ammonia solidifies on the tube even after extended operation. The present invention also provides a method of refrigeration which comprises introducing liquid nitrogen into the heat exchanger of a refrigeration apparatus in accordance with the invention and condensing refrigerant therewith. Preferably, the refrigerant is selected from the group consisting of ammonia and fluorocarbon R22.

    摘要翻译: 使用氨作为制冷剂的机械制冷设备的补充冷却是通过将管放置在缓冲容器的蒸汽空间中并将液氮引入管中来提供的。 虽然氨在-78℃固化,液氮在-196℃进入管,即使在延长操作后也不会在管上固化氨。 本发明还提供一种制冷方法,其包括将液氮引入根据本发明的制冷装置的热交换器中并与其冷凝制冷剂。 优选地,制冷剂选自氨和碳氟化合物R22。

    Method and apparatus for freezing
    4.
    发明授权
    Method and apparatus for freezing 失效
    冻结方法和装置

    公开(公告)号:US5630321A

    公开(公告)日:1997-05-20

    申请号:US367911

    申请日:1995-01-03

    申请人: Jeremy P. Miller

    发明人: Jeremy P. Miller

    摘要: A tunnel freezer is cooled by selectively supplying liquid nitrogen to banks of spray nozzles. The banks are switched on and off as required so that at any given time the pressure upstream of each operational spray nozzle will be substantially constant at a level which closely approximates the maximum heat transfer coefficient associated with the spray nozzle or the maximum effectiveness of the spray nozzle or a balance therebetween. The invention is in contrast to the prior art where the flow of liquid nitrogen to the spray nozzles is continuously varied in response to the thermal load.

    摘要翻译: 通过选择性地将液氮供应到喷嘴组中来冷却隧道式冷冻机。 根据需要开启和关闭组,使得在任何给定时间,每个操作喷嘴的上游压力基本上恒定在接近于与喷嘴相关联的最大传热系数或喷雾的最大效能的水平 喷嘴或其间的平衡。 本发明与现有技术形成对比,其中喷射喷嘴的液氮流响应于热负荷而连续变化。

    Method and apparatus for freezing aqueous liquid
    5.
    发明授权
    Method and apparatus for freezing aqueous liquid 失效
    用于冷冻含水液体的方法和装置

    公开(公告)号:US5359858A

    公开(公告)日:1994-11-01

    申请号:US89071

    申请日:1993-07-07

    摘要: A method of freezing aqueous liquids which method comprises the steps of:a) introducing the aqueous liquid into a mould;b) allowing at least the aqueous liquid in contact with said mould to freeze; andc) releasing said frozen liquid from said mould; wherein said method further comprises the step of:d) pre-cooling said mould to a temperature such that the frozen aqueous liquid can be readily released from said mould as a unitary structure.

    摘要翻译: 一种冷冻含水液体的方法,该方法包括以下步骤:a)将水性液体引入模具中; b)允许至少与所述模具接触的水性液体冷冻; 和c)从所述模具中释放所述冷冻液体; 其中所述方法还包括以下步骤:d)将所述模具预冷却到使得冷冻的含水液体可以容易地从所述模具中释放为一体结构的温度。

    Refrigeration system
    6.
    发明授权
    Refrigeration system 失效
    制冷系统

    公开(公告)号:US5483806A

    公开(公告)日:1996-01-16

    申请号:US439802

    申请日:1995-05-12

    IPC分类号: F25B9/00 F25D9/00

    CPC分类号: F25B9/004

    摘要: A refrigeration system using air as the refrigerant comprises a compressor which compresses air to 84 bar g. The compressed air is cooled first by cooling water and then by returning air in a plate-fin heat exchanger before being expanded to 59 bar g in an expander. The expanded air at -61.degree. C. is passed through indirect cooling coils in a cold store which it leaves at -45.degree. C. This air is then passed through the plate-fin heat exchanger before being recycled to the compressor. The refrigeration delivered is about 1.05 kw refrigeration/kw power input.

    摘要翻译: 使用空气作为制冷剂的制冷系统包括将空气压缩至84巴g的压缩机。 首先通过冷却水冷却压缩空气,然后在膨胀器中膨胀至59巴g之前,通过在板翅式热交换器中返回空气。 在-61℃的膨胀空气在-45℃离开的冷库中通过间接冷却盘管。然后在将空气再循环到压缩机之前将该空气通过板翅式热交换器。 供应的制冷约为1.05 kw制冷/ kw功率输入。

    Dispenser for dispensing cryogenic liquid
    7.
    发明授权
    Dispenser for dispensing cryogenic liquid 失效
    用于分配低温液体的分配器

    公开(公告)号:US5169031A

    公开(公告)日:1992-12-08

    申请号:US723867

    申请日:1991-07-01

    申请人: Jeremy P. Miller

    发明人: Jeremy P. Miller

    IPC分类号: B65B31/00 F17C9/00

    摘要: A dispenser for cryogenic liquid comprising a vacuum insulated vessel (2) which is provided with a dispenser tube (10). The dispenser tube (10) is heated in use by an electric heater (11). Sufficient heat is supplied to achieve film boiling on the inner surface of the dispenser tube (10). Flow of cryogenic liquid from the vacuum insulated vessel (2) into the dispenser tube (10) is controlled by a tapered valve member (14) which is biased downwardly by a spring (15) and which is connected to a permanent magnet (16) disposed in a coil (17). The tapered valve member (14) can be driven upwardly or downwardly according to the sense in which a direct current is applied to the coil (17). A gas relief tube (18) is provided to vent gas from the dispenser tube (10) intermediate the tapered valve member (14) and the outlet of the dispenser tube (10). The gas relief tube (18) conveys gas to the space above the cryogenic liquid, for example liquid nitrogen, in the vacuum insulated vessel (2). The dispenser has particular utility in high speed canning and bottling lines.

    摘要翻译: 一种用于低温液体的分配器,包括设有分配器管(10)的真空绝热容器(2)。 分配管(10)在使用中由电加热器(11)加热。 供应足够的热量以在分配器管(10)的内表面上实现薄膜沸腾。 从真空绝热容器(2)进入分配管(10)的低温液体的流动由锥形阀构件(14)控制,该锥形阀构件(14)由弹簧(15)向下偏压并连接到永磁体(16) 设置在线圈(17)中。 锥形阀构件(14)可以根据向线圈(17)施加直流电流的方式向上或向下驱动。 设置有气体释放管(18),用于从锥形阀构件(14)和分配器管(10)的出口之间排出来自分配管(10)的气体。 气体释放管(18)将真空绝热容器(2)中的气体输送到低温液体上方的空间,例如液氮。 分配器在高速罐装和装瓶线上具有特殊的用途。

    Tunnel freezer
    9.
    发明授权
    Tunnel freezer 失效
    隧道冷柜

    公开(公告)号:US5522238A

    公开(公告)日:1996-06-04

    申请号:US388703

    申请日:1995-03-21

    申请人: Jeremy P. Miller

    发明人: Jeremy P. Miller

    CPC分类号: F25D3/11 A23L3/362 A23L3/375

    摘要: A turbulence inducing fan blows cold gaseous nitrogen through ducts disposed to either side of a conveyor carrying product to be frozen through a freezing tunnel. The cold gaseous nitrogen is deflected downwardly onto product on the conveyor by a baffle having, in cross section, the form of a cusp. The cold gaseous nitrogen forms two counter-rotating vortex. The cold gaseous nitrogen travels across the product and then passes into an intake cowl primarily via inlets disposed adjacent both edges of the conveyor. The intake cowl collects the cold gaseous nitrogen which is sucked into the intake of the turbulence inducing fan. This arrangement provides excellent heat transfer to the product being frozen.

    摘要翻译: 湍流诱发风扇通过设置在通过冷冻隧道冷冻的传送带承载产品的任一侧的管道吹送冷气态氮。 冷气态氮通过具有截面形式的挡板的向下偏转到输送机上的产品上。 冷的气态氮形成两个反向旋转的涡流。 冷气态氮穿过产品,然后主要通过邻近输送机两边的入口进入进气罩。 进气罩收集被吸入湍流诱导风扇入口的冷气态氮。 这种布置提供了对被冷冻产品的良好的热传递。

    Tunnel freezer
    10.
    发明授权
    Tunnel freezer 失效
    隧道冷柜

    公开(公告)号:US4989416A

    公开(公告)日:1991-02-05

    申请号:US444480

    申请日:1989-12-01

    IPC分类号: A23L3/36 A23L3/375 F25D3/11

    摘要: A tunnel freezer comprises an elongate tunnel which is inclined to the horizontal and which can be rotated about its longitudinal axis. The inside of the tunnel is provided with a weir which retains a pool of liquid nitorgen between the weir and the upper end of the tunnel. Particles to be frozen are introduced into the tunnel on a conveyor and drop into the pool where they freeze substantially without aggregation. Rotation of the tunnel carries the particles out of the liquid nitrogen and through the remainder of the tunnel to the outlet end of the tunnel. The frozen particles and the nitrogen vapour from the tunnel pass through a common outlet which is provided with a pivoting plate which restricts the flow through the common outlet so that the tunnel operates at or slightly above atmospheric pressure thereby inhibiting ingress of moist air into the tunnel. Movement of particles through the tunnel is facilitated by lifting bars which form part of a liner which can be readily removed and replaced as desired. In a second embodiment the tunnel is provided with a spiral ribbon which forms a multiplicity of pools extending along the tunnel. This embodiment is particularly useful where the supply of frozen particles is variable.