Requirements for hygienic design
Design Considerations Overall
The design should not make use of any plating or coating on any of the manufactured parts or purchased components.
- All frame members of a frame used to support machine functions shall be sealed with continuous welds.
- All welds shall be continuous, smooth and polished and shall be flush, free of pits, cracks and corrosion.
- All parts shall have surface finish that will not exceed <3.2Ra.
- All dead spaces (areas that are not sealed and that can not be reached for cleaning) shall be eliminated in the design.
- In general all components used on food machines shall feature stainless steel or appropriate plastic materials.
- All components used on the machine outside of the control enclosures shall have by design a specification of IP65.
- All components with IP65 specifications used on the machine outside of the control enclosure shall also be easily cleaned and sanitized.
- Components that are required but can not be properly cleaned because of their construction shall be placed into the control enclosure or another enclosure dedicated to this function.
- All enclosure in the wash down areas shall withstand wash down (IP65) with water and chemical using during cleaning and sanitation.
The design shall only make use of metric hex head stainless steel fasteners
Cleaning and Sanitation
Control enclosures and junction boxes shall be mounted to the frame and shall not be lower then 30cm (including cables) from the floor.
The user manual shall include a short, clear and simple cleaning protocol for the machine. The protocol should address the how, what, when, who and where for the following points and should consider product zones differently from none product zones:
1. Dry cleaning
2. Pre-rinsing
3. Foaming (acceptable sanitizers)
4. Scrubbing
5. Rinsing
6. Drying
7. Visual inspection and corrective action
All materials and components used on the machine shall be compatible with the usual cleaning products used on these production lines.
Debris Handling
- The design shall prevent the accumulation of debris on the machine and shall facilitate the easy removal of accumulated debris making all surfaces of the machine accessible for cleaning.
- The design of the machine and its components shall facilitate product debris to fall onto the floor rather than rest on the machine during operation.
- The design of the conveyors and other parts/accessories of the machine shall feature minimal horizontal surfaces where product debris can rest on the machine during operation and during cleaning.
- The design shall make use of round tube or if rectangular tube has to be used, the profile shall be placed such as to form a 45 angle with the horizontal plane.
- The design of the machine and its components shall feature loose cable attachment points where cable can be routed from the corresponding component to the control.
- Routing cable through hollow tube frame members is not acceptable.
Environmental Temperature/Humidity
- The machine shall perform reliably when placed permanently in environments where the temperature can reside between 0C and 50C.
- The machine shall perform reliably when placed permanently in hot or cold, compensating or dry environments where the humidity can be between 95% (compensating) to 20% (dry) relative humidity.
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总体设计考虑
设计不应在任何制造零件或采购部件上使用任何电镀或涂层。
用于支持机器功能的框架的所有框架构件应采用连续焊接密封。
所有焊缝应连续、光滑、抛光，且应齐平，无凹坑、裂纹和腐蚀。
所有零件的表面光洁度不得超过<3.2Ra。
应在设计中消除所有死区（未密封且无法到达进行清洁的区域）。
一般而言，食品机械上使用的所有部件应采用不锈钢或适当的塑料材料。
控制外壳外的机器上使用的所有部件的设计规格应为IP65。
控制外壳外的机器上使用的所有IP65规格的部件也应易于清洁和消毒。
需要但由于其结构而无法正确清洁的部件应放置在控制外壳或专用于此功能的另一外壳中。
清洗区的所有外壳应能承受清洗和卫生期间用水和化学品的清洗（IP65）。
设计应仅使用公制六角头不锈钢紧固件
清洁和卫生
控制外壳和接线盒应安装在框架上，离地板的距离不得低于30cm（包括电缆）。
用户手册应包括简短、清晰和简单的机器清洁协议。协议应针对以下几点说明如何、什么、何时、何人和何地，并应将产品区域与非产品区域区分开来：
1.干洗
2.预冲洗
3.起泡（可接受的消毒剂）
4.擦洗
5.漂洗
6.干燥
7.目视检查和纠正措施
机器上使用的所有材料和部件应与这些生产线上使用的常用清洁产品兼容。
碎片处理
设计应防止碎屑在机器上堆积，并应便于清除堆积的碎屑，使机器的所有表面易于清洁。
机器及其部件的设计应便于产品碎片在操作过程中掉落到地板上，而不是停留在机器上。
输送机和机器其他部件/附件的设计应具有最小的水平表面，在操作和清洁过程中，产品碎片可能停留在机器上。
设计应使用圆管，或者如果必须使用矩形管，则应放置剖面，以便与水平面形成45°角。
机器及其部件的设计应具有松散的电缆连接点，电缆可从相应部件布线至控制装置。
不允许将电缆穿过空心管框架构件。
环境温度/湿度
当机器永久放置在温度介于0℃和50℃之间的环境中时，机器应可靠运行。
当机器永久放置在热或冷、补偿或干燥环境中时，机器应可靠运行，其中湿度可在95%（补偿）至20%（干燥）相对湿度之间。
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