IEC 62552:2015 Automatic Refrigerator Door Opening and Closing
Tester
Product Information:
The tester is intended for durability testing of vertical freezer
doors and can also be used in conjunction with refrigerator energy
efficiency tests to simulate door opening/closing cycles. This is a
specialized automated test device, ideal for certification bodies,
factory laboratories, and other inspection departments.
The system adopts a mature PLC-based intelligent control, featuring
adjustable motion actuators, suction cup assemblies for securing
onto refrigerator surfaces, and a color LCD touchscreen for
parameter input. Users can preset test angle, speed, and door
operation timing to realistically simulate manual door
opening/closing, achieving intelligent multi-functional control.
Test Principle:
• Door Opening:
The servo motor drives a mechanical arm to pull a rope that moves
the suction-cup-mounted door from 0°to 5–15°under controlled
motion, after which the door moves freely to the target angle.
• Door Closing:
The servo motor drives the arm with a pressure wheel to push the
door from 45°to 35–40°under controlled motion, followed by a
free-motion phase until fully closed.
• One complete open-close cycle is defined as a single test cycle.
• 50N Swing Test:
The refrigerator door is first opened to 90°(mechanically limited
from the inside). A suction cup is fixed on the door’s outer edge,
farthest from the hinge. A weight (connected by a steel wire) is
lifted and dropped by a pneumatic cylinder to apply a 50N force,
swinging the door beyond 90° to its maximum angle.
The arm then resets the door to 90°, and the impact is repeated
10,000 times.
Mechanical Structure:
As shown in the figures, the equipment features an integrated frame
structure. The refrigerator sample is placed on the baseplate to
ensure relative motion causes internal stress rather than vibration
of the whole machine.
Two vertical columns are mounted on the baseplate (left and right),
each containing two door opening/closing mechanisms, as shown in
Figure 1, allowing simultaneous testing of refrigerators with up to
four doors.
The test sample configuration is shown in Figure 2.
Figure 1
Figure 2
Technical Specifications:
| No. | Item | Specification |
| 1 | Power Supply | AC 220V, 50Hz, 5 kW |
| 2 | Control System | Mitsubishi PLC intelligent control |
| 3 | HMI Interface | WEINVIEW 7-inch color touchscreen |
| 4 | Drive System | Door opening/closing: Servo motor + precision reducer
Door slamming: Cylinder |
| 5 | Applicable Sample | Same type as shown in Figure 2 W×D×H = (0.4~1.0 m) × (0.4~1.0 m) × (0.6~2.0 m) |
| 6 | Test Items | 1. Refrigerator door durability test (left-opening, right-opening,
French doors)
2. 50N door slamming test |
| 7 | Test Stations | 1 station for testing 1 refrigerator, compatible with
left/right/French doors; 4 robotic arms can operate independently or simultaneously |
| 8 | Upright Columns | 2 columns (left and right), each with 2 motor-driven swing arms;
adjustable suction cup height to match door positions |
| 9 | Mechanical Arms | 4 sets (upper/lower left, upper/lower right); adjustable in length
and height to fit various door sizes |
| 10 | Suction Cup Mechanism | 4 sets of stable suction cups for reliable door holding |
| 11 | Weight Trays | 4 sets for 50N door slamming test |
| 12 | Test Cycle Count | 0–999,999 cycles adjustable via touchscreen; automatic stop upon
completion |
| 13 | Door Opening Angle | 0–100°, adjustable via touchscreen with ±0.1° accuracy |
| 14 | Door Operation Pause Time | 0–99,999.9 seconds, adjustable via touchscreen |
| 15 | Door Operation Speed | 6–30 cycles/min, adjustable via touchscreen |
| 16 | Refrigerator Positioning | 3 sets of positioning structures to secure refrigerator sides and
back |
| 17 | Door Tilt Angle Detection | Equipped with angle sensor; communicates with PLC to stop the test
and alert if door angle exceeds set limit |
| 18 | Frame | Compatible with maximum sample size; refrigerator mounted on frame
base plate |
| 19 | Power-off Memory | System retains memory of test progress and resumes from where it
stopped after a power failure |
| 20 | Data & Curve Display | Touchscreen displays tilt angle and impact cycle curves; historical
data query available |
| 21 | Safety Protection | Emergency stop, leakage protection, short circuit, overload
protection |
| 22 | Dimensions & Weight | Frame: W1800 × D1400 × H2400 mm, approx. 350 kg |
