IEC 60335-2-11 Clause 20.101 Integrated Door Endurance Testing
Machine For Refrigerators Test
Product information:
The integrated door endurance testing machine conforms to
IEC60335-2-4:2008 clause 18, IEC60335-2-11:2008 clause 20.101,
IEC60335-2-7:2016 clause 18 and 22.104, IEC60335-2-24:2020 clause
23.3 and etc.
Samples and restrictions:
Refrigeration appliances (refrigerators, freezers), ice cream
machines and ice makers (single-phase ≦250V, others ≦480V, DC
≦24V), microwave ovens, ovens.
Test purpose:
Used to perform durability life test and tension test when locking
the door on the interlocking device of the cover or door of the
refrigerator and freezer. To verify the reliability of the
interlocking device. It is also used to assist other tests to
perform repeated door opening and closing actions. Such as
defrosting test and refrigerant leakage test.
Test principle:
The motor drives the mechanical arm to drive the door or cover
sucked by the vacuum suction cup to reciprocate at a certain speed.
This verifies the reliability of the interlocking device. A force
sensor is installed on the mechanical arm to form a closed-loop
control with the servo motor. The door opening force value can be
accurately controlled and measured.
Equipment structure:
The equipment consists of an electrical control cabinet (including
a load voltage regulator), a rack, and a mechanical arm mounted
thereon.
The overall frame structure is adopted, and the sample is placed on
the bottom plate of the equipment, so that the relative movement is
internal stress, reducing the shaking of the equipment. A
column-type structure is installed on the bottom plate. The left
column contains a set of upper and lower door opening and closing
mechanisms. The right column contains a set of left and right door
opening and closing mechanisms. At the same time, the bottom plate
adopts a centering structure, which is compatible with left and
right opening tests (not at the same time).
Equipment dimensions: Approximately: 1800×1300×2200 (mm) W×D×H,
Equipment weight: 350kg
Safety protection device: Leakage protection, overload and short
circuit protection, overload, short circuit protection
Use environment:
Power supply: AC220V±10%/50-60Hz, power 6KW
Air source: 0.5-0.7MPa compressed air
Use place: atmospheric pressure 80～106kpa; ambient temperature
5～40°C; relative humidity (20～80)%RH; no violent shaking,
vibration, no electromagnetic interference, no dust, no explosive
and corrosive gases, good heat dissipation
Technical parameter:
| Test station | Double stations, including 1 station for upper and lower opening
and 1 station for left and right door opening |
| Electrical control method | PLC intelligent integrated control, 7-inch human-machine touch
interface operation |
| Drive method | Servo motor drive |
| Sample clamping method | Vacuum suction cup, pneumatic |
| Testable sample range | The following types of samples, WDH = (0.5 ~ 1.2m) × (0.5 ~ 0.7m) ×
(0.8 ~ 2.0m) and microwave oven, oven 
|
| Test items | 1. Durability test of vertical refrigerator door interlock device
(compatible with left and right opening) 2. Durability test of microwave oven and oven switch cover |
| Column | There are 2 columns on the platform (left and right columns), each
column has a built-in lifting mechanism, which can adjust the
height of the robot arm suction cup to match the opening and
closing of the door |
| Mechanical arm | 2 sets of door opening and closing mechanical arms (one set on each
of the left and right mechanical arms), the mechanical arms and the
suction cups are rigidly connected |
| Adsorption structure | Vacuum suction cup, continuous and stable adsorption, will not fall
off, 2 sets |
| Opening and closing speed | 0-360°/s (1.5m/s), pre-settable |
| Opening and closing angle | 0-130°, pre-settable |
| Number of tests | 0-999999 times, pre-settable |
| Opening and closing force value | 0-200N, display and judgment results |
| Load voltage | 0-250V, adjustable |
| Auxiliary action mechanism | Linear action pressing cylinder (optional) |
