CN113229508A - 果蔬微环境多场防褐变设备 - Google Patents
果蔬微环境多场防褐变设备 Download PDFInfo
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Abstract
本发明涉及一种果蔬微环境多场防褐变设备,包括低磁通密度静磁场协同冷激预处理机构和低氧气调破碎机构,低磁通密度静磁场协同冷激预处理机构包括恒温水箱,在恒温水箱的外部设置有静磁场线圈,恒温水箱与外部冷水循环系统连接,冷水循环系统外接乙二醇制冷循环系统,低氧气调破碎机构配套制冷系统。本发明设备设计科学合理、使用高效,提供一种采用低磁通密度静磁场协同冷激预处理、低温切分和无氧破碎方法,低温抑制酶的活性,有效抑菌、防止褐变、减少营养素损失,有效抑制褐变的果蔬微环境多场防褐变设备,既可以用于鲜切果蔬的防褐变处理,也可以用于果蔬汁压榨过程中的防褐变处理。
Description
技术领域
本发明属于农产品加工领域,涉及果蔬加工防褐变技术,尤其是一种果蔬微环境多场防褐变设备。
背景技术
果蔬中含有的单宁、氧化酶、酪氨酸、色素、醛类和某些金属离子等易氧化物质,在榨汁过程中容易被氧化,使汁液呈现褐色,浑浊,并产生氧化气味,导致褐变和营养物质损失。防止酶促,褐变是果蔬加工中首先要解决的问题。
果蔬采后切分或者压榨加工过程褐变分为酶促褐变和非酶促褐变。酶促褐变主要发生在果汁加工过程中,切分和压榨阶段以酶促褐变为主,酚类底物、酶和O2是酶促褐变发生的3个必要生化条件,另外,酶促反应也与氧化反应的环境温度和PH等条件有关。果蔬汁加热时或贮存期间存在非酶褐变,邻羟基酚氧化后生成邻醌或半醌自由基,而氧被还原为H2O2,主要表现为焦糖化和美拉德反应,温度是主要因素。
果蔬传统防褐变主要采用添加护色剂和热烫方法防止酶促褐变,维生素和微量元素破坏严重,虽然能一定程度的解决果蔬褐变问题,但是并不能确保成品的品质,从而影响其货架期和市场销售价值。
通过对现有公开专利文献的检索,有如下几篇技术相关的公开专利文献:
1、一种水果加工用破碎装置(CN108371327A),主要采用限位块、驱动装置、外壳和挤压块等部件构成的挤压机构,其能够实现对水果的充分的挤压破碎,使得水果能够得到充分的破碎,且不会遗留残渣在设备里,维护清洗起来极为方便。
该公开技术方案只有一次压榨,效果难以保证;压榨舱室内是空气,压榨过程会发生酶促褐变;常温压榨,压榨过程由于电机转动或摩擦产生热量,导致水果营养素损失。
2、一种果蔬冲击破碎机(CN 101390648B),该技术方案包括:从进料口喂入的水果、蔬菜等农业物料由高速旋转的动刀盘上预切刀粗切后再经定柱刀和动柱刀冲击破碎,被破碎的物料具有较高的汁液游离率,适用于水果、蔬菜原汁生产线上榨汁前物料的破碎。
该公开专利技术中主要问题:①冲击破碎,果仁和果肉混在一起,无法分离;②压榨舱室内是空气,压榨过程会发生酶促褐变;③常温压榨,压榨过程由于电机转动或摩擦产生热量,导致水果营养素损失。
3、一种滚筒式水果破碎装置(CN107051629A),包括上端开口的集汁槽、以及所述的集汁槽内横向设置的破碎机构,所述的破碎机构包括过集汁槽的左右两侧壁上通过轴承对称设置的两个转轴、横向设置在两个转轴之间的筛筒、筛筒的左侧盖的右端面上和右侧盖的左端面上对称设置的两个气缸、以及气缸的移动端均安装的挤压板。该公开专利技术通过对称设置的两个挤压板相对运动,将水果进行挤压破碎,同时驱动电机驱动筛筒转动,将果汁甩出到集汁槽内,水果破碎之后,通过喷水管上的喷头,喷出清水,对筛筒和集汁槽进行清洗,大大的提高了工作效率,使设备简单化,减少了设备的占地面积。
主要问题:①挤压破碎,破碎效果难以保证,果仁和果肉混在一起,无法分离;②压榨舱室内是空气,压榨过程会发生酶促褐变。③常温压榨,压榨过程由于电机转动或摩擦产生热量,导致水果营养素损失。
发明内容
本发明的目的在于克服现有技术的不足之处,提供一种采用低磁通密度静磁场协同冷激预处理、低温切分和无氧破碎方法,低温抑制酶的活性,有效抑菌、防止褐变、减少营养素损失,有效抑制褐变的果蔬微环境多场防褐变设备。
本发明解决其技术问题是采取以下技术方案实现的:
一种果蔬微环境多场防褐变设备,包括低磁通密度静磁场协同冷激预处理机构和低氧气调破碎机构,低磁通密度静磁场协同冷激预处理机构的果蔬预处理出口连接低氧气调破碎机构的果蔬入口,所述的低磁通密度静磁场协同冷激预处理机构包括恒温水箱,在恒温水箱的外部设置有静磁场线圈,在该静磁场线圈的外部设置有磁场隔音箱,所述恒温水箱与外部冷水循环系统连接,该冷水循环系统外接乙二醇制冷循环系统,低氧气调破碎机构配套制冷系统。
而且,所述的低氧气调破碎机构包括去核单元和多级破碎单元,在去核单元上设置有进料口,低磁通密度静磁场协同冷激预处理后果蔬进入该进料口,其内部设置有纵向破碎刀,在去核机构的下部开设有果肉出口和果仁出口,果肉出口连接多级破碎单元的入口,该果肉出口处设置有保温门。
而且,所述去核单元外接纳米雾化器,该纳米雾化器通过雾化管道将雾化液送入进料口处设置的喷头中,对进入去核单元中的果蔬进行纳米雾化处理。
而且,所述的多级破碎单元包括若干个破碎单体依次连接,每个破碎单体内均设置有带有筛孔的横向破碎榨筒,在每个横向破碎榨筒的下部均设置有倾斜式震荡送料盘,每个倾斜式震荡送料盘的低端伸入下一级破碎单体的入口,在最后一级破碎单体的出口端设置有收集料槽。
而且,在每个破碎单体上均设置有气调进气口和出气口,在每个破碎单体的底部均设置有分液槽和分料槽。
而且,在每个破碎单体内均设置有脉冲电磁场发生器。
而且,所述的冷水循环系统包括蒸发器,该蒸发器外接所述乙二醇制冷循环系统的冷凝器和乙二醇储液罐。
而且,所述的恒温水箱通过控制系统控制,该控制系统连接磁场强度传感器和温度传感器,磁场强度传感器和温度传感器设置在恒温水箱内。
本发明的优点和积极效果是:
1、本发明利用静磁场协同冷激预处理技术,显著提高果蔬冷却速率,降低失重率和腐烂率,有效保持色值,减缓膜损伤,提高抗氧化活性增强,抑制褐变。
2、本发明的低氧气调破碎机构采用离心式去核方式,先经切刀切片,降低切割细胞破损,离心分离果肉和果仁,提高分离效率,三级破碎压榨工艺,提供破碎效果。
3、本发明的低氧气调破碎机构采用保温且气密,压榨过程舱室内充气N2或其他惰性气体,隔绝O2,解决传统破碎工艺酶促褐变难题;且配套制冷系统,压榨舱室内温度可调,创新低温破碎工艺,解决传统加工过程营养素损失大难题。
4、本发明中去核单元外接纳米雾化器,该纳米雾化器通过雾化管道9-1将雾化液送入进料口处设置的喷头中,对进入去核单元中的果蔬进行纳米雾化处理,实现近纳米雾化防褐变处理,将防褐变剂雾化成近纳米级颗粒,增到接触面积,5次雾化防褐变,最大程度抑制褐变。
5、本发明设备设计科学合理、使用高效,提供一种采用低磁通密度静磁场协同冷激预处理、低温切分和无氧破碎方法,低温抑制酶的活性,有效抑菌、防止褐变、减少营养素损失,有效抑制褐变的果蔬微环境多场防褐变设备,既可以用于鲜切果蔬的防褐变处理,也可以用于果蔬汁压榨过程中的防褐变处理。
附图说明
图1为本发明的结构示意图。
具体实施方式
下面通过具体实施例对本发明作进一步详述,以下实施例只是描述性的,不是限定性的,不能以此限定本发明的保护范围。
一种果蔬微环境多场防褐变设备,如图1所示,包括低磁通密度静磁场协同冷激预处理机构和低氧气调破碎机构,低磁通密度静磁场协同冷激预处理机构的果蔬预处理出口连接低氧气调破碎机构的果蔬入口。
果蔬破碎前,先经静磁场协同冷激预处理设备进行预处理40-60min,冷激温度控制2-4℃,磁场强度70-80Gs,磁场发生器由亥姆霍兹线圈(内径:300-400mm,外径:420-450mm,间距:200-220mm,厚度:50-60mm,圈数:500-600),静磁场电源(电压范围:0-80V,电流范围:0-5A)和高斯计(精度:±0.1%,量程:0-200Gs)。磁场发生器通过调节,使磁通密度控制范围0-95Gs。
所述的低磁通密度静磁场协同冷激预处理机构包括恒温水箱6,在恒温水箱的外部设置有静磁场线圈4,在该静磁场线圈的外部设置有磁场隔音箱5。所述恒温水箱与外部冷水循环系统连接,该冷水循环系统外接乙二醇制冷循环系统。
所述的冷水循环系统包括蒸发器2,该蒸发器外接所述乙二醇制冷循环系统的冷凝器1和乙二醇储液罐26。乙二醇通过蒸发器输入恒温水箱的流体交换管,为恒温水箱提供冷源,冷热交换完成后乙二醇回收入蒸发器打回冷凝器后进入乙二醇储液罐,实现冷源的循环使用。
所述的恒温水箱通过控制系统3控制,该控制系统连接磁场强度传感器25和温度传感器24,磁场强度传感器和温度传感器设置在恒温水箱内。
所述的制冷循环系统以乙二醇溶液作为制冷剂,恒温水箱内设置有磁场强度传感器和温度传感器,可分别传递温度和磁场强度信号给控制系统,进行实时监测。
所述的低氧气调破碎机构包括去核单元和多级破碎单元,在去核单元上设置有进料口7,低磁通密度静磁场协同冷激预处理后果蔬进入该进料口,其内部设置有纵向破碎刀8,在去核机构的下部开设有果肉出口22和果仁出口23,果肉出口连接多级破碎单元的入口,该果肉出口处设置有保温门22-1。
所述去核单元外接纳米雾化器9,该纳米雾化器通过雾化管道9-1将雾化液送入进料口处设置的喷头中,对进入去核单元中的果蔬进行纳米雾化处理。纳米雾化处理通过控制水泵压力实现喷雾,喷雾量和雾化颗粒大小通过调节水与气压大小和喷嘴调节,雾化系统主要有雾化喷嘴、过滤器、开关阀门、流量表、控制箱、低压水泵、空压机组成。
雾化液有以下成分组成:0.05%Nacl,0.01%VC,0.15%曲酸,0.004%半胱氨酸,其余为水,雾化粒径5μm。雾化管道即提供雾化防褐变,也具有清洗功能,只需要更换雾化喷头即可。
所述的多级破碎单元包括若干个破碎单体依次连接,每个破碎单体内均设置有带有筛孔的横向破碎榨筒12,在每个横向破碎榨筒的下部均设置有倾斜式震荡送料盘14,每个倾斜式震荡送料盘的低端15伸入下一级破碎单体的入口,在最后一级破碎单体的出口端设置有收集料槽18。
在每个破碎单体上均设置有气调进气口21和出气口13,在每个破碎单体的底部均设置有分液槽20和分料槽19。
在每个破碎单体内均设置有脉冲电磁场发生器10。
低磁通密度静磁场的作用主要有以下几方面:(1)提高预冷效率,水分子经过磁场处理后氢键变弱,比热容降低,冷却时间缩短。(2)杀菌作用,静磁场对微生物细胞活力、细胞增殖、细胞内离子浓度和细胞形态有明显影响,静磁场会干扰磁场细胞死亡过程正常,导致细胞内钙浓度升高,例如磁场可以抑制大肠杆菌的生长,抑制其细胞活性。静磁场处理对果蔬表面的病原菌具有抑制作用,可以有效抑制腐烂。(3)提高果蔬抗氧化能力。低磁通量的磁场作用于植物组织,可以提高抗氧化系统(过氧化物酶、过氧化氢酶等)的活性,增强了植物的抗氧化能力、清除活性氧自由基,其作用机理是金属离子在磁场的作用使酶的结构发生了变化,电磁处理可以避免传统加热灭菌对食品组织结构、营养、色泽和风味的破坏。(4)抑制褐变,果蔬中叶绿素含量直接影响果蔬表皮颜色的变化。叶绿素在酸性和光照条件下极不稳定,易分解。磁场处理提高了果蔬的抗逆性,抑制了酸性物质对果蔬的伤害,减少了叶绿素的降解,有效改善了果蔬表皮色泽。(5)降低果蔬冷害。在适当磁通密度下,不仅相变时间显著缩短,而且粗糙度均匀,并观察到冰晶均匀圆形的图案,有利于生物组织在冷冻或冷藏过程中避免冷害。(6)抑制果实失水。在贮藏期间,水分在果实细胞和组织中扩散,逐渐流失。静磁场处理后的水分子受到洛仑兹力的影响,抑制了扩散效率,减少了水分流失,延缓了果实组织软化,有利于延长果蔬采后的货架期。(7)抑制膜透性的增大。膜透性是果蔬组织成熟衰老的重要指标之一。当组织受到外界环境的伤害时,电解质渗透速度加快,电导率增加。果蔬在磁场作用下,极性电荷离子进入细胞,细胞外液的等效电阻增大,电导率降低,增强了组织的抵抗能力。
低氧气调破碎机构包括去核单元和多级破碎单元,去核单元为离心式去核转筒,其内部设置有纵向破碎刀,将水果切片,并采用离心方式分离果肉、果仁和多余水分,果肉经压榨后通过保温门进入多级破碎单元,果仁经离心排出。
本实施例中,多级破碎单元为三级结构,一级11,二级16,三级17,每级压榨结构内的榨轴齿轮间逐级减少,榨筒筛孔孔径逐级减少,使得压榨出来的果汁粒径越来越小,提高破碎效果。其中,一级破碎果蔬破碎颗粒≤5mm,出汁率≥80%,二级破碎果蔬破碎颗粒≤2mm,出汁率≥90%,二级破碎果蔬破碎颗粒≤1mm,出汁率≥95%。可根据实际生产需要取不同颗粒和破碎度的产品。
另外,低氧气调破碎机构的内层为保温且气密结构,从内向外依次为:2mm厚铝板、制冷排管、100mm厚高密度聚氨酯双面彩钢板、1.2mm厚PE塑料膜、2mm厚铝板、不锈钢机架,气密结构目的是保证压榨仓室内可充入N2或者其他惰性气体或混合气体(如N2和CO2),充分隔绝O2,气调进气口在下,出气口在上,即可联合气调也可以独立气调,防止酶促褐变。
低氧气调破碎机构配套制冷设备,保证压榨舱室内低温环境,且有温度监测和控制,功能控温范围-5℃~+15℃,根据不同果蔬品质可调,大大降低破碎压榨过程中果蔬维生素和微量元素损失。
尽管为说明目的公开了本发明的实施例,但是本领域的技术人员可以理解:在不脱离本发明及所附权利要求的精神和范围内,各种替换、变化和修改都是可能的,因此,本发明的范围不局限于实施例所公开的内容。
Claims (8)
1.一种果蔬微环境多场防褐变设备,其特征在于:包括低磁通密度静磁场协同冷激预处理机构和低氧气调破碎机构,低磁通密度静磁场协同冷激预处理机构的果蔬预处理出口连接低氧气调破碎机构的果蔬入口,所述的低磁通密度静磁场协同冷激预处理机构包括恒温水箱,在恒温水箱的外部设置有静磁场线圈,在该静磁场线圈的外部设置有磁场隔音箱,所述恒温水箱与外部冷水循环系统连接,该冷水循环系统外接乙二醇制冷循环系统,低氧气调破碎机构配套制冷系统。
2.根据权利要求1所述的一种果蔬微环境多场防褐变设备,其特征在于:所述的低氧气调破碎机构包括去核单元和多级破碎单元,在去核单元上设置有进料口,低磁通密度静磁场协同冷激预处理后果蔬进入该进料口,其内部设置有纵向破碎刀,在去核机构的下部开设有果肉出口和果仁出口,果肉出口连接多级破碎单元的入口,该果肉出口处设置有保温门。
3.根据权利要求2所述的一种果蔬微环境多场防褐变设备,其特征在于:所述去核单元外接纳米雾化器,该纳米雾化器通过雾化管道将雾化液送入进料口处设置的喷头中,对进入去核单元中的果蔬进行纳米雾化处理。
4.根据权利要求2所述的一种果蔬微环境多场防褐变设备,其特征在于:所述的多级破碎单元包括若干个破碎单体依次连接,每个破碎单体内均设置有带有筛孔的横向破碎榨筒,在每个横向破碎榨筒的下部均设置有倾斜式震荡送料盘,每个倾斜式震荡送料盘的低端伸入下一级破碎单体的入口,在最后一级破碎单体的出口端设置有收集料槽。
5.根据权利要求4所述的一种果蔬微环境多场防褐变设备,其特征在于:在每个破碎单体上均设置有气调进气口和出气口,在每个破碎单体的底部均设置有分液槽和分料槽。
6.根据权利要求5所述的一种果蔬微环境多场防褐变设备,其特征在于:在每个破碎单体内均设置有脉冲电磁场发生器。
7.根据权利要求1所述的一种果蔬微环境多场防褐变设备,其特征在于:所述的冷水循环系统包括蒸发器,该蒸发器外接所述乙二醇制冷循环系统的冷凝器和乙二醇储液罐。
8.根据权利要求1所述的一种果蔬微环境多场防褐变设备,其特征在于:所述的恒温水箱通过控制系统控制,该控制系统连接磁场强度传感器和温度传感器,磁场强度传感器和温度传感器设置在恒温水箱内。
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