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    • 5. 发明授权
    • Cryogenic tunnel freezer
    • 低温隧道式冷冻机
    • US5444985A
    • 1995-08-29
    • US242531
    • 1994-05-13
    • Gary D. LangWalter C. BroderdorfWilliam M. Blumthal
    • Gary D. LangWalter C. BroderdorfWilliam M. Blumthal
    • F25D3/11F25D13/06F25D3/12F25D17/02F25D25/04
    • F25D3/11
    • A tunnel freezer uses carbon dioxide snow to directly contact product carried on a conveyor belt passing through the freezer. Fans are provided above and below the upper conveyor belt run carrying the product, with the fans above and below having downwardly directed exhaust. Trough-shaped deflector plates are provided adjacent the lower fans to circulate a flow adjacent the underneath surface of the upper conveyor belt run. Preferably, circulation adjacent the upper conveyor belt run is generally parallel to the upper conveyor belt run, and turning vanes are provided to deflect the flow upwardly through the upper conveyor belt run. Freezers may be provided with one or more cooling zones arranged in series along the path of conveyor belt travel.
    • 隧道式冷冻机使用二氧化碳雪直接接触通过冷冻机的传送带上携带的产品。 风扇设置在承载产品的上部输送带行程的上方和下方,上方和下方的风扇具有向下排列的排气。 在下部风扇附近提供槽形偏转板,以使邻近上部输送带运行的下表面的流动循环。 优选地,邻近上传送带行程的循环通常平行于上传送带行程,并且提供转动叶片以使流向上偏转上传送带运行。 冷冻机可以设置有沿传送带行进路径串联设置的一个或多个冷却区域。
    • 7. 发明授权
    • Food freezer
    • 食品冷柜
    • US5042262A
    • 1991-08-27
    • US520773
    • 1990-05-08
    • Roger F. GygerGary D. LangKenneth L. Burgers
    • Roger F. GygerGary D. LangKenneth L. Burgers
    • F25B9/00A23L3/36F25B7/00F25B41/00F25D13/06
    • F25B41/00A23L3/361A23L3/362F25B7/00F25D13/06B65G2207/24F25B2309/06F25B9/008
    • A food freezer having a mechanical refrigeration system comprising first and second closed-loop fluid circuits, wherein the first fluid circuit employs carbon dioxide as its refrigerant and transfers heat to the second fluid circuit, which in turn transfers heat to the environment or to another fluid circuit. In the first fluid circuit evaporator, carbon dioxide is maintained at pressures between 60.4 psig and 120 psig. In a preferred embodiment of the invention, the freezer employs at least two separate blowers or fans for circulation of air or other gas in the freezer enclosure. One blower/fan operates continuously to maintain circulation of cold air or gas in the freezer. The other blower/fan operates intermittently or at variable speeds to vary air flow across the evaporator, and thereby increase or decrease heat transfer from the freezer interior to the first fluid circuit evaporator to maintain the freezer interior at a desired temperature or within a desired temperature range.
    • 一种具有包括第一和第二闭环流体回路的机械制冷系统的食品冷冻机,其中所述第一流体回路采用二氧化碳作为其制冷剂并将热量传递到所述第二流体回路,所述第二流体回路又将热传递到环境或另一流体 电路。 在第一流体回路蒸发器中,二氧化碳保持在60.4psig至120psig之间的压力。 在本发明的优选实施例中,冷冻器采用至少两个分开的鼓风机或风扇,用于在冷冻箱中循环空气或其它气体。 一个鼓风机/风扇连续运转,以保持冷藏室内冷空气或气体的循环。 另一鼓风机/风扇间歇地或以可变速度工作以改变蒸发器上的气流,从而增加或减少从冷冻室内部到第一流体回路蒸发器的热传递,以将冷冻室内部保持在所需温度或期望温度 范围。
    • 9. 发明授权
    • Method and apparatus for retention of a refrigerant fluid in a
refrigeration enclosure
    • 用于将制冷剂流体保持在冷藏箱中的方法和装置
    • US5966946A
    • 1999-10-19
    • US92933
    • 1998-06-08
    • John Martin GirardWilliam Michael BlumthalGary D. LangMark Stephen Nowotarski
    • John Martin GirardWilliam Michael BlumthalGary D. LangMark Stephen Nowotarski
    • F25B1/00F25D3/11F25D29/00F25D23/02
    • F25D29/001F25D3/11
    • The method of the invention is based on the comparison of local vapor concentrations at the inlet and outlet refrigeration ports and taking action based on that comparison. Control apparatus incorporating the invention is installed inside a refrigeration enclosure, adjacent to a port, preferably at the lowermost port. If the enclosure contains multiple ports at similar height, then each port has a form of the control apparatus attached to it. The control apparatus adjusts a flow of vapor leaving the interior of the enclosure. The control apparatus includes a duct assembly and a blower system. The bottom portion of the duct assembly is a tunnel enclosure through which a conveyor belt passes. Connected to an inside edge of the tunnel enclosure is a duct that extends upward from the conveyor belt. A blower for this duct either sucks vapor away from the conveyor belt or blows vapor from the enclosure interior toward the belt. Regardless of the flow direction, a vapor curtain forms inside the tunnel enclosure and represents a transitional region from all vapor to all air. Control of the blower for the duct assembly is based on vapor concentrations in the tunnel enclosures adjacent to each port. A microprocessor compares measured concentration levels and alters the blower motor frequency in such a manner as to minimize the difference in concentration levels at each port.
    • 本发明的方法是基于对入口和出口制冷端口的局部蒸汽浓度的比较,并基于该比较采取行动。 结合本发明的控制装置安装在与端口相邻的制冷机壳中,优选在最下端的端口。 如果机箱包含多个类似高度的端口,则每个端口都具有连接到其上的控制设备的形式。 控制装置调节离开外壳内部的蒸气流。 控制装置包括管道组件和鼓风机系统。 管道组件的底部是输送带通过的隧道外壳。 连接到隧道外壳的内边缘是从传送带向上延伸的管道。 用于该管道的鼓风机将蒸汽从传送带吸入或从外壳内部朝向带吹送蒸气。 不管流动方向如何,蒸气幕形成在隧道外壳内,代表从所有蒸气到全部空气的​​过渡区域。 用于管道组件的鼓风机的控制基于与每个端口相邻的隧道外壳中的蒸汽浓度。 微处理器比较测量的浓度水平并改变鼓风机电机的频率,以使每个端口的浓度水平差异最小化。