食物搅拌机安规要求

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Constructions - 5
For Blender: Open-top container: the center opening < 66.7 mm, and > 25.4 mm Container Abuse Test (21.9.4.6) – During ice crushing, no cracking occurred
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Polymeric Enclosure Requirements - 2
Minimum requirements for Portable Appliances:
1. Flame rated HB 2. HWI <= 4 3. HAI < = 1 (Usually) 4. Suitable Color / Thickness
Also called hi-pot test
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Performance - 5
Abnormal Operation Test (Section 33, 40.11)
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Constructions - 4
Protection Against Injuries (Section 21) (cont’d) 3. Guard – cannot be removed 4. Interlock – cannot be defeated by probe, perform endurance test 5. OFF position – clearly shown
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CUL Requirements
Canadian Standards for Portable Electrical MotorOperated and Heating Appliances:
General Requirements, C22.2 No. 1335.1 Particular Requirements for Electrical Motor-Operated Kitchen Appliances, C22.2 No. 1335.2.14-93
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Constructions - 2
Spacing between uninsulated live parts and dead metal parts – Table 18.1 Spacing between opposite polarities (1.6 mm, or 2.4 mm for wattage > 249 W)
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Components - 3
Motor Protectors:
Fusible link – length, diameter Thermal fuse – type, temperature Thermostat – automatic appliances (15-d locked rotor test, under UL2111)
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Constructions - 6
For Food Chopper:
CБайду номын сангаасver actuated interlock, with 10,000-cycle endurance test Misaligned cover – Opening not larger than 25.4 mm (21.9.5.3b)
Motor-Operated Household Food Serving Machines
Organized by : UL International Ltd. (An Affiliate of Underwriters Laboratories Inc.) Date Presenter : June 16, 2003 : Ronald Ho
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Let’s take a break?
Z…Z…Z…!
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Components - 1
All components should be UL Listed / Recognized Internal wiring / Power Supply Cord / Plug Wire connectors / Cable Ties PWB Motor Protectors
Conduct on as-received sample, and repeat on sample after 48h condition in 88% r.h. and 32º C
Operate as normal until well-heated
Also operate on reverse polarity
Not exceed 0.5 mA (120V, 2-conductor)
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Performance - 4
Dielectric Voltage Withstand Test (Section 28)
Apply 1000V between live parts (usually plug), and accessible dead metal parts (or enclosure wrap with aluminum foil), for 1 minute (120V, <373W) No dielectric breakdown occur Sensitivity: 1000V across 120k-ohm resistor
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Components - 4
Instruction Manual (Section 44)
1. Include IMPORTANT SAFEGUARDS 2. Operation instruction 3. Cleaning Instruction 4. Maintenance Instruction 5. Figures, Photos
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Contents
Introduction Polymeric Enclosure Requirements Construction Requirements Components Requirements Performance Other Information
2
Introduction - 1
S-blade cutting assembly – with handle
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Constructions - 7
Risk of Electric Shock is considered to exist at any part if, Potential between the part and earth ground (any other accessible part) > 42.4 V peak Continuous current flow through a 1500 ohm resistor > 0.5 mA These parts should not be exposed to user!
•
Blender:
1. Carrot-to-water ratio: 2:3 by weight 2. Filled to max. fill line, cover opened. If spill-over, loading to be added until to container lip. If no spill-over, just fill to max. line. • Food Chopper: (not to employ liquid as loading)
UL982: Motor-Operated Household Food Preparing Machines
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Introduction - 2
Attended Intermittent-Duty Household Use:
Infrequent, Short-time Use Used only while Attended Examples: Blenders, Food Choppers
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Polymeric Enclosure Requirements - 1
Section 40 of UL982
Requirements for Portable Appliances 1. Cover Polymeric Enclosures / Polymeric part of Enclosures 2. Decorative or similar parts for Protection Against Injuries
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Introduction - 3
Portable Appliances - An appliance that is actually moved or can easily be moved from one place to another in normal use Stationary Appliances
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Constructions - 3
Protection Against Injuries (Section 21) 1. Not be sufficiently sharp for persons during normal maintenance and use 2. Moving parts should be enclosed / guarded (except those exposed for work function)
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Performance - 3
Leakage Current Test (Section 23, 29)
Leakage current measured between ground and exposed dead metal (or enclosure wrap with aluminum foil)
1. Loading according to manual
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Performance - 2
Normal Temperature Test (Section 27)
• • • • Protector should not operate Temperatures not exceed limits (e.g. Class A motor winding of 110º C) Blender: 10 cycles, each 3 minutes on, 1 minute off. Food Chopper: 10 cycles, loading and operating time according to Instruction Manual, 1 minute off
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Components - 5
Cautionary Markings (Section 46)
1. “Household Use Only” 2. Other specific markings
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Performance - 1
Input Test (Section 26)
• maximum power not deviate from rated wattage by 45W or 15% (depend on rated wattage)
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Constructions - 1
Enclosures – To enclose all uninsulated live parts, moving parts and internal components
Openings – No such parts accessible through openings Corrosion Protection
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Components - 2
Requirements of Components:
Temperature / Voltage / Current ratings
Power Supply Cord requirements: Type, length (refer to Section 11.1.1)