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CN111912159A - 利用径向错流风扇的冷藏展示柜 - Google Patents

利用径向错流风扇的冷藏展示柜 Download PDF

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CN111912159A
CN111912159A CN202010377108.8A CN202010377108A CN111912159A CN 111912159 A CN111912159 A CN 111912159A CN 202010377108 A CN202010377108 A CN 202010377108A CN 111912159 A CN111912159 A CN 111912159A
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heat exchanger
microchannel heat
air
precooler
radial cross
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A.乔达尔
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Carrier Corp
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • A47F3/0447—Cases or cabinets of the open type with forced air circulation with air curtains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/067—Evaporator fan units
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0478—Control or safety arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0482—Details common to both closed and open types
    • A47F3/0486—Details common to both closed and open types for charging, displaying or discharging the articles
    • A47F3/0491—Cooled shelves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/006—General constructional features for mounting refrigerating machinery components
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • A47F2003/046—Cases or cabinets of the open type with forced air circulation with shelves having air ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/22—Refrigeration systems for supermarkets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/041—Treating air flowing to refrigeration compartments by purification
    • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification

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  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Freezers Or Refrigerated Showcases (AREA)

Abstract

冷藏展示柜包括围绕多个架的外壳。空气分配间隙限定于架后面。回风通道限定于架下方。径向错流风扇设置在回风通道的风扇区域中。径向错流风扇包括连接到空气分配间隙的输出。主冷却微通道热交换器设置在风扇区域中在径向错流风扇下游，使得从径向错流风扇输出到空气分配间隙的空气穿过主冷却微通道热交换器。预冷器微通道热交换器设置在主冷却微通道热交换器的上游。

Description

利用径向错流风扇的冷藏展示柜
技术领域
本公开总体上涉及冷藏展示柜，并且更具体地涉及利用径向错流风扇驱动冷藏空气的柜。
背景技术
在实践中，杂货店和超市使用不同类型的冷藏商品柜，其可以是敞开的或带有门的，以向顾客展示新鲜食品和饮料，同时将产品的温度保持在预定义阈值以下。为了保持低温，通过使气流流过蒸发器的热交换器表面，使冷空气循环到柜的产品展示区域。冷的制冷剂被泵送通过管的内部通道，该管通过翅片和管表面从空气中吸收热量，并在此过程中从液相变为气相。结果，降低了穿过蒸发器的空气的温度。一个或多个风扇通常包括在冷藏展示柜的基座中，并且将冷空气驱动通过热交换器并进入商品柜的产品展示区域。
除了由于所需的热交换器尺寸而增加的运行成本和较高的第一成本外，结霜和除霜循环的需要也对风扇性能和商品柜的能源效率产生负面影响。
发明内容
在一个示例性实施例中，一种冷藏展示柜包括：围绕多个架的外壳；限定在多个架后面的空气分配间隙；限定在多个架下面的回风通道；设置在回风通道的风扇区域中的径向错流风扇，径向错流风扇具有连接到空气分配间隙的输出；主冷却微通道换热器，所述主冷却微通道换热器设置在风扇区域中在径向错流风扇下游，使得从径向错流风扇输出到空气分配间隙的空气穿过主冷却微通道热交换器；以及预冷器微通道热交换器，所述预冷器微通道热交换器设置在主冷却微通道热交换器的上游。
在上述冷藏展示柜的另一个示例中，预冷器微通道热交换器设置在错流风扇的下游。
在任何上述冷藏展示柜的另一示例中，预冷器微通道热交换器将径向错流风扇的输出连接到空气分配间隙。
在上述冷藏展示柜中的任何一个的另一个示例中，主冷却微通道热交换器设置在预冷器微通道热交换器的正下游。
在上述冷藏展示柜中的任何一个的另一示例中，预冷器微通道热交换器设置在径向错流风扇的上游。
在上述冷藏展示柜中的任何一个的另一示例中，预冷器微通道热交换器包括连接至径向错流风扇的输入的冷却空气输出。
在上述冷藏展示柜中的任何一个的另一示例中，预冷器微通道热交换器具有第一饱和温度，并且主冷却微通道热交换器具有第二饱和冷却温度，并且其中第二饱和温度低于第一饱和温度。
在上述冷藏展示柜中的任何一个的另一示例中，第一饱和温度低于从回风中提取水分所需的温度且高于多个架的最小冷却温度。
在上述冷藏展示柜中的任何一个的另一示例中，第二饱和温度高于霜温度。
上述冷藏展示柜中的任何一个的另一个示例还包括顶部管道，该顶部管道限定在多个架上方并且将空气分配间隙连接到气幕风扇；以及第三微通道热交换器，该第三微通道热交换器连接到气幕风扇，使得冷却的空气被提供给气幕风扇。
在上述冷藏展示柜中的任何一个的另一示例中，风扇区域位于回风通道的下游端。
一种冷却冷藏展示柜中的架的示例性方法包括：使用径向错流风扇驱动空气通过冷却回路，使空气穿过主微通道热交换器，从而将空气冷却到低于至少一个架的最低冷却温度，并在使空气穿过主微通道热交换器之前使用预冷器微通道热交换器从空气中提取水分。
在上述冷却冷藏展示柜中的架的方法的另一示例中，预冷器微通道热交换器在径向错流风扇的下游并且在主微通道热交换器的上游。
在上述冷却冷藏展示柜中的架的方法中的任何一个的另一示例中，预冷器微通道热交换器在径向错流风扇的上游。
上述冷却冷藏展示柜中的架的方法中的任何一个的另一个示例还包括使用气幕风扇驱动空气的至少一部分以产生向下流动的空气幕。
上述冷却冷藏展示柜中的架的方法中的任何一个的另一个示例还包括紧接在气幕风扇之前使用微通道热交换器冷却空气的至少一部分。
上述冷却冷藏展示柜中的架的方法中的任何一个的另一个示例还包括在低于霜点的饱和温度下操作主微通道热交换器，并在高于霜点且低于凝结点的温度下操作预冷器微通道热交换器。
上述冷却冷藏展示柜中的架的方法中的任何一个的另一个示例还包括响应于控制器确定低负荷时段而停用预冷器微通道热交换器。
上述冷却冷藏展示柜中的架的方法中的任何一个的另一个示例还包括响应于控制器检测到门打开而重新启用预冷器微通道热交换器。
根据下面的说明书和附图可以最好地理解本发明的这些和其他特征，下面是附图的简要描述。
附图说明
图1示出了现有技术的冷藏展示柜。
图2示意性地示出了包括径向错流风扇的示例性冷藏展示柜。
图3示意性地示出了包括径向错流风扇的第二示例性冷藏展示柜。
具体实施方式
图1示意性地示出了示例性现有技术的冷藏展示柜10。现有技术的柜10包括容纳在柜外壳14内的多个架12。每个架12面对前开口16，并且在后端处由金属片分配板20支撑。金属片分配板20在柜10的后部中限定间隙30，并且在柜10的顶部处限定间隙40。由于在间隙30和间隙40之间没有障碍物，所以两个间隙30、40组合以限定单个冷却的空气空间。分配板20包括多个分配孔22，其允许冷却的空气从间隙30的后部穿过进入对应的架12区域。
间隙30内还包括圆管板翅式热交换器50，用于冷却提供给架12的空气。风扇52在最底部架12下方的返回腔54的后端处定位在热交换器50的正下游。风扇52驱动来自返回腔54的所有空气穿过热交换器50，从而使所有空气被冷却。热交换器50的后端51将冷却的空气排出到间隙30中。一部分空气向上穿过间隙30流到顶部间隙40和顶部架12。重定向特征32将另一部分的冷却空气的流动方向改变180度，使得重定向的冷却空气被提供给下部架12。
间隙30的尺寸由热交换器50的尺寸以及热交换器50与分配板20之间的空间决定，该空间允许向每个架12提供足够的空气。此外，由于所有空气均由单个热交换器50冷却，因此热交换器50的尺寸必须设定成足以将所有空气冷却至保持低于所需温度的温度，直到其从热交换器50到达最远的架12。这可以导致中间架的过冷，以便在顶部和/或底部架12处实现期望的冷却。更进一步，从热交换器50的输出行进到需要冷却的每个架12使提供给架12的空气的温度高于热交换器50的出口温度。
继续参考现有技术图1，图2示意性地示出了包括多个架112的示例性冷藏展示柜100。架112为一种或多种温度敏感产品提供储存空间。玻璃门102包围柜体104的前部。如本文中所使用的，“前”是指柜的面向用户透过玻璃门102观看的一侧，并且诸如后面、上方、下方等的相对尺寸设有所识别的前部作为参考系。
架112由定位在架112的后部处的分配板120支撑在柜内。空气分配间隙130设置在架112的后面。空气分配间隙130将空气从主微通道热交换器150传输到每个架112。回风通道154设置在所有架112的下方，并且为废气提供从架112返回到冷却系统的路径。风扇152设置在回风通道152的风扇区域151中。风扇152是径向错流风扇，并且驱动空气通过微通道热交换器150，并进入空气分配间隙130。如本文中所使用的，径向错流风扇是指包括圆柱形叶片转子的风扇，该圆柱形叶片转子被安装成围绕其轴线在预定方向上旋转并限定内部空间。风扇包括与转子一起限定吸入区域和压力区域的引导装置。引导装置和转子在后者沿预定方向旋转时配合，以引导流体流从吸入区域通过转子上的旋转叶片路径到达内部空间，并再次通过旋转叶片路径到达压力区域。引导装置和转子配合以形成涡流，该涡流具有与转子轴线偏心的芯区和引导流体的场区，使得通过转子的流体围绕涡芯强力弯曲。径向错流风扇可以替代地称为“切向”或“横向”风扇。同样，如本文所使用的，微通道热交换器是指主要利用扁平管结构的热交换器。扁平管热交换器102包括通过多个扁平管流体连接的入口歧管和出口歧管。扁平管可以形成为包括多个通道或内部通道，其比常规的圆管板翅式热交换器50中的管的内部通道小得多。
如本文所使用的，扁平管还可以包括迷你型多端口通道或微型多端口通道(也称为微通道管)。使用小尺寸多端口通道的扁平管热交换器也被称为微通道热交换器102。在替代构造中，扁平管可包括一个通道或内部通道。微通道热交换器102包括具有百叶窗的蛇形翅片形式的多个辅助传热表面。翅片围绕管的宽度，该管的宽度还限定微通道热交换器102的较小尺寸，并且空气流过该较小尺寸。翅片沿着扁平管定位，并通过钎焊或焊接工艺牢固地联接到两个相邻的扁平管。尽管可以理解的是，冷却空气以环的形式循环，如本文所用，回风通道154的上游端被称为循环的开始。
可以理解的是，诸如主微通道热交换器150的微通道热交换器在相对较高的制冷剂饱和温度下结霜，并且当微通道热交换器具有较高的饱和温度时，难以保持足够低的架112温度。为了改善这一点，在主微通道热交换器150的上游包括第二微通道热交换器156(称为预冷器微通道热交换器156)。另外，第二微通道热交换器允许有足够的时间从气流中除去足够的热量，以将空气冷却到所需的必要温度。
在图2的示例中，预冷器微通道热交换器156定位在回风通道154的后端处，并且预冷器微通道热交换器156的冷却空气输出直接提供给径向错流风扇152的输入。类似地，主微通道热交换器150定位在风扇区域151中在径向错流风扇152的正下游，并将冷却的空气输出提供给空气分配间隙130。
预冷器微通道换热器156保持在足够高的饱和温度下，预冷器微通道换热器156上没有结霜，但是在足够低的饱和温度下，预冷器微通道换热器156用作除湿器，并在将空气提供给径向错流风扇152之前从空气中提取水分。主微通道热交换器150设置在风扇152的下游，并保持在足够冷的饱和温度下，以使离开主微通道热交换器150的空气被冷却到足够低的温度，以将架112的温度保持低于所需的冷却阈值。
为了降低成本和/或最小化能量消耗，控制器101可以被结合在冷藏展示柜100内，并且可以被配置为在诸如夜间或其他不经常打开和关闭门102的时间的低负荷的时间期间停用(不操作)预冷却器156。。在此类时间期间，预冷器微通道热交换器156的蒸发器功能可能是不必要的，因为具有冷藏展示柜的空气是封闭系统，并且直到门102打开才引入新的湿气。
为了防止可能尚未从空气中去除的任何水分从主微通道热交换器150滴落到径向错流风扇152中，主微通道热交换器150相对于重力成角度，并滴入径向错流风扇152上游的集水盘153。
在冷藏柜100的顶端上方设置有连接到空气分配间隙130的顶部间隙140。顶部间隙140将尚未分配到架112之一的空气提供给气幕产生风扇160。气幕产生风扇160在架112的前面向下吹空气以产生气幕。气幕有助于防止外部空气与架112上的冷却空气混合，并通过架112吸入空气，从而进一步增加在给定架112上能够实现的冷却。
在图2所示的示例中，第三微通道热交换器162设置在气幕产生风扇160的正上游，并为气幕提供进一步的冷却。在一些示例中，风扇160可以连续操作，从而产生连续的气幕。在替代示例中，控制器101可以感测何时打开门102，并且风扇160可以响应于门的打开而被启用，从而防止在门关闭时不必要的能量使用。
继续参考图2，图3示出了冷藏展示柜200的另一个示例。替代示例冷藏展示柜200包括基本相似的冷却回路，包括空气分配间隙230、分配板220、架212和顶部间隙240。在图3的示例中，预冷器微通道热交换器156从径向错流风扇252的上游(如图2的示例中)移动到径向错流风扇252的正下游，并且在径向错流风扇252的输出和主微通道热交换器250的输入之间。如在图2的示例中一样，主微通道热交换器150相对于重力成角度，以使冷凝物积聚在滴盘253中。由于预冷却器热交换器156的取向不同，预冷却器热交换器156也成角度以允许冷凝以避免径向错流风扇，并且以相同的方式从系统中移除。
还应理解，任何上述概念都可以单独使用或与任何或所有其他上述概念组合使用。虽然已公开了本发明的实施方案，但是本领域的普通技术人员将认识到某些修改将属于本发明的范围内。因此，应该研究随附权利要求来确定本发明的真正范围和内容。

Claims (19)

1.一种冷藏展示柜，其包括：
外壳，所述外壳围绕多个架；
空气分配间隙，所述空气分配间隙限定于所述多个架后面；
回风通道，所述回风通道限定于所述多个架下方；
径向错流风扇，所述径向错流风扇设置在所述回风通道的风扇区域中，所述径向错流风扇具有连接至所述空气分配间隙的输出；
主冷却微通道热交换器，所述主冷却微通道热交换器设置在所述风扇区域中在所述径向错流风扇下游，使得从所述径向错流风扇输出到所述空气分配间隙的空气穿过所述主冷却微通道热交换器；和
预冷器微通道热交换器，所述预冷器微通道热交换器设置在所述主冷却微通道热交换器上游。
2.根据权利要求1所述的冷藏展示柜，其中所述预冷器微通道热交换器设置在所述错流风扇的下游。
3.根据权利要求2所述的冷藏展示柜，其中所述预冷器微通道热交换器将所述径向错流风扇的输出连接至所述空气分配间隙。
4.根据权利要求3所述的冷藏陈列柜，其中所述主冷却微通道热交换器设置在所述预冷器微通道热交换器的正下游。
5.根据权利要求1所述的冷藏展示柜，其中所述预冷器微通道热交换器设置在所述径向错流风扇的上游。
6.根据权利要求5所述的冷藏展示柜，其中所述预冷器微通道热交换器包括连接到所述径向错流风扇的输入的冷却空气输出。
7.根据权利要求1所述的冷藏展示柜，其中所述预冷器微通道热交换器具有第一饱和温度，并且所述主冷却微通道热交换器具有第二饱和冷却温度，并且其中所述第二饱和温度低于所述第一饱和温度。
8.根据权利要求7所述的冷藏展示柜，其中所述第一饱和温度低于从回风中提取水分所需的温度且高于所述多个架的最小冷却温度。
9.根据权利要求8所述的冷藏展示柜，其中所述第二饱和温度高于霜温度。
10.根据权利要求1所述的冷藏展示柜，其还包括顶部管道，所述顶部管道限定在所述多个架上方并且将所述空气分配间隙连接到气幕风扇；以及第三微通道热交换器，所述第三微通道热交换器连接到所述气幕风扇，使得冷却的空气被提供给所述气幕风扇。
11.根据权利要求1所述的冷藏陈列柜，其中所述风扇区域位于所述回风通道的下游端。
12.一种冷却冷藏展示柜中的架的方法，其包括：
使用径向错流风扇驱动空气通过冷却回路；
使所述空气穿过主微通道热交换器，从而将所述空气冷却到低于至少一个架的最低冷却温度；以及
在使所述空气穿过所述主微通道热交换器之前，使用预冷器微通道热交换器从所述空气中提取水分。
13.根据权利要求12所述的方法，其中所述预冷器微通道热交换器在所述径向错流风扇的下游并且在所述主微通道热交换器的上游。
14.根据权利要求12所述的方法，其中所述预冷器微通道热交换器在所述径向错流风扇的上游。
15.根据权利要求12所述的方法，其还包括使用气幕风扇驱动所述空气的至少一部分以产生向下流动的空气幕。
16.根据权利要求15所述的方法，其还包括在紧接所述气幕风扇之前使用微通道热交换器来冷却所述空气的所述至少一部分。
17.根据权利要求12所述的方法，其还包括在低于霜点的饱和温度下操作所述主微通道换热器，并且在高于所述霜点且低于冷凝点的温度下操作所述预冷器微通道换热器。
18.如权利要求12所述的方法，其还包括响应于控制器确定低负荷时段而停用所述预冷器微通道热交换器。
19.根据权利要求18所述的方法，其还包括响应于控制器检测到门打开而重新启用所述预冷器微通道热交换器。
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