A refrigerator door opening and closing test device

Abstract

The present invention provides a device for testing the opening and closing of refrigerator doors. A device for testing the opening and closing of refrigerator doors comprises: a frame; a door opening and closing monitoring mechanism, which is arranged on the frame and used to monitor the opening and closing state of the refrigerator door, including a monitoring frame and a plurality of photoelectric sensors, a spacing for accommodating the refrigerator door from the height direction is provided between the two ends of the monitoring frame, and the plurality of photoelectric sensors are arranged on the monitoring frame at different angles to the plane where the monitoring frame and the refrigerator door are located; a limiting mechanism; an actuator; a driving mechanism; and a control component. The present invention realizes a complete simulation of the entire force application process of manually opening and closing the door in a real scene, and is suitable for the opening and closing test of refrigerator doors of various specifications and models. The test process is fully automated, and the accuracy of the test results is greatly improved, reducing the difference between the theoretical test of the product and the actual application effect.

Description

Technical Field

[0001] The invention relates to a door testing device, in particular to an opening and closing testing device for a refrigerator door. Background Art

[0002] Typical commercial refrigeration appliances are commercial refrigerators. When testing their performance, it is necessary to conduct door opening and closing tests, operate the door opening angle, control the door opening time and the opening and closing batches, and conduct the above tests for a long time. Manual testing alone is prone to cause large errors and greatly consumes human resources. Therefore, the common practice now is to use an automatic door opening and closing device for testing.

[0003] There are many requirements for the door opening and closing test of commercial refrigeration appliances. For example, during the power consumption test of a closed frozen food display cabinet, the door should be opened cyclically for 12 hours within 24 hours, the door should be opened 6 times per hour, the opening angle should exceed 60°, the total opening time should be 6 seconds, and the opening time should be at least 4 seconds. According to the durability test requirements of GB / T 8059-2016 for the doors of household and similar refrigeration appliances, during the test, the movement process of the door when the opening angle is between 0° and 5°~15° is a controlled process, followed by the free movement process of the door, and the movement process of the door when the opening angle is between 45° and 40°~35° is a controlled process, followed by the automatic movement process of the door. It can be seen that for different test standards for different types of products, the frequency of door opening and the opening time requirements during the test are different.

[0004] Some of the automatic door opening and closing devices in the prior art cannot control the opening and closing frequency, door opening angle and door opening time, etc. Some of the automatic door opening and closing devices with the above functions cannot completely simulate the changes in the force applied to the door at different angles when the door is opened and closed manually. Because the test conditions cannot completely simulate the actual usage scenarios, the accuracy of the test results is greatly reduced, resulting in differences between the product theoretical test and the actual application effect. Summary of the invention

[0005] The object of the present invention is to provide a refrigerator door opening and closing test device, which has good simulation performance for actual usage scenarios and high controllability during the test process, and solves the problems described in the background technology.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A refrigerator door opening and closing test device, comprising:

[0008] frame;

[0009] The door opening and closing monitoring mechanism is arranged on the frame and used to monitor the opening and closing state of the refrigerator door, and includes a monitoring frame and a plurality of photoelectric sensors. A spacing for accommodating the refrigerator door in the height direction is arranged between the two ends of the monitoring frame. The plurality of photoelectric sensors are arranged on the monitoring frame at different angles to the plane where the monitoring frame and the refrigerator door are located.

[0010] The limiting mechanism is arranged on the frame and includes a limiting plate for abutting against the side of the refrigerator and a plurality of suction cup components;

[0011] An actuator is arranged on the frame, comprising an actuator terminal for releasably connecting to the refrigerator door and at least two transmission rods, wherein the transmission rods are hingedly connected to each other, an end of one transmission rod is hingedly connected to the actuator terminal, and an end of the other transmission rod is connected to the driving mechanism;

[0012] The driving mechanism is arranged on the frame, and comprises a driving motor and a rotating shaft, wherein one end of the rotating shaft is connected to the driving motor, and the other end of the rotating shaft is connected to the transmission rod;

[0013] The control component is arranged on the frame and is electrically connected with the door opening and closing monitoring mechanism and the driving mechanism.

[0014] Preferably, the photoelectric sensor includes a light emitter, a light receiver and a detection circuit board, the light emitter is arranged at the top of the monitoring frame, the light receiver is arranged at the bottom of the monitoring frame corresponding to the light emitter, and the light receiver is electrically connected to the control component through the detection circuit board.

[0015] Preferably, the monitoring frame includes a vertical rod, a first top rod, a second top rod, a first bottom rod and a second bottom rod. The vertical rod is vertically arranged on the frame. The top end of the vertical rod is transversely fixedly connected to the first top rod and the second top rod, and a first angle is formed between the first top rod and the second top rod. The bottom end of the vertical rod is transversely fixedly connected to the first bottom rod and the second bottom rod, and a second angle which is the same as the first angle is formed between the first bottom rod and the second bottom rod.

[0016] Preferably, the angle value of the first angle and the second angle is 45° to 90°.

[0017] Preferably, the ends of the first top rod, the second top rod, the first bottom rod and the second bottom rod are each provided with an adjustment plate, the adjustment plate is slidably connected to the first top rod, the second top rod, the first bottom rod and the second bottom rod, and the photoelectric sensor is arranged on the adjustment plate.

[0018] Preferably, there are at least four photoelectric sensors, and the photoelectric sensors form at least a third angle, a fourth angle, a fifth angle and a sixth angle with the plane where the monitoring frame and the refrigerator door are located. The angle value of the third angle is 0° to 5°, the angle value of the fourth angle is 5° to 15°, the angle value of the fifth angle is 35° to 45°, and the angle value of the sixth angle is 45° to 65°.

[0019] Preferably, the control component includes a programmable logic controller, which is used to perform the following control steps: in a complete refrigerator door opening and closing cycle, start the drive motor to rotate forward, and when the refrigerator door passes the photoelectric sensor corresponding to the third angle for the first time, reduce the drive motor speed to a first set threshold; when the refrigerator door passes the photoelectric sensor corresponding to the fourth angle for the first time, reduce the drive motor speed to a second set threshold; when the refrigerator door passes the photoelectric sensor corresponding to the sixth angle for the first time, stop the drive motor and start timing, and when the timing reaches the first set time period, start the drive motor and reverse; when the refrigerator door passes the photoelectric sensor corresponding to the fifth angle again, reduce the drive motor speed to a second set threshold; when the refrigerator door passes the photoelectric sensor corresponding to the third angle again, stop the drive motor and start timing again, and when the timing reaches the set second set time period, start the drive motor again and rotate forward to start the next complete refrigerator door opening and closing cycle.

[0020] Preferably, the limiting plate is fixedly connected to the lower part of the frame, and the suction cup component is fixedly connected to the middle part of the frame.

[0021] Preferably, the execution terminal comprises a terminal seat and a connecting piece, the terminal seat is hinged to the transmission rod, the connecting piece is detachably fixedly connected to the terminal seat, and the connecting piece is a suction cup or a clamp.

[0022] Preferably, the surface of the rotating shaft is provided with a plurality of grooves along the axial direction, the transmission rod is sleeved on the surface of the rotating shaft, a through hole corresponding to the groove is provided at the connection between the transmission rod and the rotating shaft, a connecting column matching the groove is provided between the rotating shaft and the transmission rod, and the connecting column passes through the through hole and is inserted into the groove. By plugging the connecting column into different grooves, the height of the transmission rod relative to the rotating shaft can be adjusted to adapt to refrigerator doors of different heights.

[0023] Preferably, universal wheels are provided at the bottom of the frame, and weight blocks are provided on the surface of the frame.

[0024] The beneficial effects of the present invention are:

[0025] A refrigerator door opening and closing test device of the present invention can fully simulate the entire force application process of manually opening and closing the door in real scenes, is suitable for opening and closing tests of refrigerator doors of various specifications and models, and the test process is fully automated, the accuracy of the test results is greatly improved, and the difference between theoretical product testing and actual application effects is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the adjustment plate of the present invention;

[0030] Figure 4 It is a schematic diagram of the rotating shaft structure of the present invention.

[0031] In the figure: 1, frame, 2, door opening and closing monitoring mechanism, 3, limit mechanism, 4, actuator, 5, drive mechanism, 6, control component, 7, refrigerator door, 11, universal wheel, 12, weight block, 21, monitoring frame, 22, photoelectric sensor, 31, limit plate, 32, suction cup component, 41, execution terminal, 42, transmission rod, 51, drive motor, 52, rotating shaft, 61, programmable logic controller, 211, vertical rod, 212, first push rod, 213 , second top rod, 214, first bottom rod, 215, second bottom rod, 216, adjustment plate, 221, light transmitter, 222, light receiver, 411, terminal seat, 412, connecting piece, 421, through hole, 422, connecting column, 521, groove, 2161, slide groove, 2162, slider, 2163, locking bolt, a, first angle, b, second angle, c, third angle, d, fourth angle, e, fifth angle, f, sixth angle. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any form of modification and / or change made to the present invention will fall within the protection scope of the present invention.

[0033] In the present invention, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the art. The methods in the following embodiments, unless otherwise specified, are conventional methods in the art. The components or equipment in the following embodiments, unless otherwise specified, are universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0034] Embodiment 1:

[0035] like Figure 1 and Figure 2 The device for testing the opening and closing of a refrigerator door of a single-door refrigerator shown in the figure comprises a frame 1 , a door opening and closing monitoring mechanism 2 , a limiting mechanism 3 , an actuator 4 , a driving mechanism 5 and a control component 6 .

[0036] The frame 1 is an L-shaped plate structure, and a universal wheel 11 is provided at the bottom for easy movement. A weight block 12 is provided on the surface of the frame, and a regular row of nut holes is arranged on the weight block, and the weight block can be added or deleted as needed.

[0037] The door opening and closing monitoring mechanism 2 is arranged on the frame, and is used to monitor the opening and closing status of the refrigerator door 7 , and includes a monitoring frame 21 and four photoelectric sensors 22 .

[0038] A spacing for accommodating the refrigerator door from the height direction is provided between the ends of both ends of the monitoring frame, and the monitoring frame includes a vertical rod 211, a first top rod 212, a second top rod 213, a first bottom rod 214, and a second bottom rod 215. The vertical rod is vertically arranged on the frame, the top end of the vertical rod is transversely fixedly connected to the first top rod and the second top rod, and a first angle a is formed between the first top rod and the second top rod, and the bottom end of the vertical rod is transversely fixedly connected to the first bottom rod and the second bottom rod, and a second angle b which is the same as the first angle is formed between the first bottom rod and the second bottom rod, and the angle value of the first angle and the second angle is 45° to 90°. This embodiment is for testing the refrigerator door. Considering that the opening angle of the refrigerator door during the test can reach 45°, and a margin is left for the setting of the photoelectric sensor, the angle value of the first angle and the second angle is selected to be 55°.

[0039] The ends of the first top rod, the second top rod, the first bottom rod and the second bottom rod are all provided with an adjustment plate 216, and the adjustment plate is slidably connected with the first top rod, the second top rod, the first bottom rod and the second bottom rod, and a photoelectric sensor is provided on the adjustment plate. The typical structure of the adjustment plate is as follows Figure 3The rectangular plate shown has a slide groove 2161 at one end, which is slidably connected to the slider 2162 at the bottom of the first top rod, the second top rod, the first bottom rod and the second bottom rod. The side of the slide groove is penetrated with a locking bolt 2163. After the adjustment plate is slid to the desired position, the locking bolt is tightened to fix the relative position of the adjustment plate and the bottom of the first top rod, the second top rod, the first bottom rod and the second bottom rod. Of course, the adjustment plate can also be designed as a rectangular plate with adjustable length. Two sensor components are set at both ends of each adjustment plate. The position angle of the sensor component can be adjusted by extending or shortening the length of the adjustment plate itself.

[0040] Four photoelectric sensors are arranged on the monitoring frame at different angles to the plane where the monitoring frame and the refrigerator door are located. Each photoelectric sensor includes a light emitter 221, a light receiver 222 and a detection circuit board. The light emitter is arranged at the top of the monitoring frame, and the light receiver is arranged at the bottom of the monitoring frame corresponding to the light emitter. The light receiver is electrically connected to the control component through the detection circuit board. The four photoelectric sensors are respectively at a third angle c, a fourth angle d, a fifth angle e and a sixth angle f with the plane where the monitoring frame and the refrigerator door are located. The angle value of the third angle is 0° to 5°, the angle value of the fourth angle is 5° to 15°, the angle value of the fifth angle is 35° to 45°, and the angle value of the sixth angle is 45° to 65°. In this embodiment, considering the thickness of the refrigerator door, the angle value of the third angle is set to 2°. In addition, the angle value of the fourth angle is set to 15°, the angle value of the fifth angle is set to 40°, and the angle value of the sixth angle is set to 45°.

[0041] The limiting mechanism 3 is arranged on the frame, and includes a limiting plate 31 for contacting the side of the refrigerator and two suction cup components 32. The suction cup components 32 are adsorbed on the side wall of the refrigerator, the limiting plate is fixedly connected to the lower part of the frame, and the suction cup components are fixedly connected to the middle part of the frame. In this way, the relative position of the refrigerator and the opening and closing test device remains unchanged during the opening and closing process of the refrigerator door.

[0042] The actuator 4 is arranged on the frame, and includes an actuator terminal 41 for releasably connecting the refrigerator door and two transmission rods 42, the transmission rods are hingedly connected, the end of one transmission rod is hingedly connected to the actuator terminal, and the end of the other transmission rod is connected to the driving mechanism. The actuator terminal includes a terminal seat 411 and a connecting piece 412, the terminal seat is hingedly connected to the transmission rod, the connecting piece is detachably fixedly connected to the terminal seat, and the connecting piece is a suction cup, or can be replaced with a clamp as needed.

[0043] The driving mechanism 5 is arranged on the frame, and includes a driving motor 51 and a rotating shaft 52, one end of the rotating shaft is connected to the driving motor, and the other end of the rotating shaft is connected to the transmission rod. Figure 4As shown, the surface of the rotating shaft is provided with a plurality of grooves 521 along the axial direction, the transmission rod is sleeved on the surface of the rotating shaft, a through hole 421 corresponding to the groove is provided at the connection between the transmission rod and the rotating shaft, a connecting column 422 matching the groove is provided between the rotating shaft and the transmission rod, and the connecting column passes through the through hole and is inserted into the groove. By plugging the connecting column into different grooves, the height of the transmission rod relative to the rotating shaft can be adjusted to adapt to refrigerator doors of different heights.

[0044] The control component 6 is arranged on the frame and is electrically connected to the door opening and closing monitoring mechanism and the driving mechanism. The control component includes a programmable logic controller 61, which is used to perform the following control steps:

[0045] (1) In a complete refrigerator door opening and closing cycle, the drive motor is started to rotate forward, and when the refrigerator door passes the photoelectric sensor corresponding to the third angle for the first time, the speed of the drive motor is reduced to a first set threshold;

[0046] (2) when the refrigerator door passes the photoelectric sensor corresponding to the fourth angle for the first time, the speed of the drive motor is reduced to a second set threshold;

[0047] (3) When the refrigerator door passes the photoelectric sensor corresponding to the sixth angle for the first time, the drive motor is stopped and timing is started. When the timing reaches a first set time period, the drive motor is started and reversed;

[0048] (4) when the refrigerator door passes the photoelectric sensor corresponding to the fifth angle again, the speed of the drive motor is reduced to a second set threshold;

[0049] (5) When the refrigerator door passes the photoelectric sensor corresponding to the third angle again, the drive motor is stopped and the timing is started again. When the timing reaches the set second set time period, the drive motor is started again and rotates forward to start the next complete refrigerator door opening and closing cycle.

[0050] Through the above technical solution, the door opening frequency, door opening angle, door opening time, door opening state time and total cycle door opening time can be conveniently set during the refrigerator door opening and closing test. Most importantly, the above solution can completely simulate the entire force application process of manual door opening and closing in real scenes, and fully complies with the durability test requirements of GB / T 8059-2016 for refrigerator doors, which greatly improves the accuracy of the test results and reduces the difference between theoretical product testing and actual application effects.

[0051] Embodiment 2:

[0052] A device for testing the opening and closing of a refrigerator door of a double-door refrigerator. Two devices for testing the opening and closing of refrigerator doors are symmetrically arranged on both sides of the double-door refrigerator. The technical solution of the device for testing the opening and closing of one refrigerator door is exactly the same as that of Example 1. The technical solution of the device for testing the opening and closing of another refrigerator door is different from that of Example 1 in that it only includes a frame 1 and a limiting mechanism 3.

[0053] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A refrigerator door opening and closing test device, characterized in that: The refrigerator door opening and closing test device comprises: Rack(1); A door opening and closing monitoring mechanism (2) is arranged on a frame and is used to monitor the opening and closing state of a refrigerator door (7), comprising a monitoring frame (21) and a plurality of photoelectric sensors (22), wherein a spacing for accommodating the refrigerator door in a height direction is provided between the two ends of the monitoring frame, and the plurality of photoelectric sensors are arranged on the monitoring frame at positions forming different angles with respect to the plane where the monitoring frame and the refrigerator door are located; A limiting mechanism (3) is arranged on the frame, comprising a limiting plate (31) for abutting against the side of the refrigerator and a plurality of suction cup components (32); An actuator (4) is arranged on the frame, comprising an actuator terminal (41) for releasably connecting to the refrigerator door and at least two transmission rods (42), wherein the transmission rods are hingedly connected to each other, an end of one transmission rod is hingedly connected to the actuator terminal, and an end of the other transmission rod is connected to the driving mechanism; A driving mechanism (5) is arranged on the frame, comprising a driving motor (51) and a rotating shaft (52), wherein one end of the rotating shaft is connected to the driving motor, and the other end of the rotating shaft is connected to a transmission rod; A control component (6) is arranged on the frame and is electrically connected to the door opening and closing monitoring mechanism and the driving mechanism; The photoelectric sensor comprises a light transmitter (221), a light receiver (222) and a detection circuit board, the light transmitter being arranged at the top end of the monitoring frame, the light receiver being arranged at the bottom end of the monitoring frame corresponding to the light transmitter, and the light receiver being electrically connected to the control component via the detection circuit board; The monitoring frame comprises a vertical rod (211), a first top rod (212), a second top rod (213), a first bottom rod (214) and a second bottom rod (215), wherein the vertical rod is vertically arranged on the frame, the top end of the vertical rod is transversely fixedly connected to the first top rod and the second top rod, a first angle (a) is formed between the first top rod and the second top rod, the bottom end of the vertical rod is transversely fixedly connected to the first bottom rod and the second bottom rod, a second angle (b) which is the same as the first angle is formed between the first bottom rod and the second bottom rod; the angle value of the first angle and the second angle is 45° to 90°; The ends of the first top rod, the second top rod, the first bottom rod and the second bottom rod are all provided with an adjustment plate (216), the adjustment plate is slidably connected to the first top rod, the second top rod, the first bottom rod and the second bottom rod, and the photoelectric sensor is arranged on the adjustment plate; There are at least four photoelectric sensors, and the photoelectric sensors and the plane where the monitoring frame and the refrigerator door are located form at least a third angle (c), a fourth angle (d), a fifth angle (e) and a sixth angle (f), wherein the third angle has an angle value of 0° to 5°, the fourth angle has an angle value of 5° to 15°, the fifth angle has an angle value of 35° to 45°, and the sixth angle has an angle value of 45° to 65°; The control component comprises a programmable logic controller (61), which is used to execute the following control steps: in a complete refrigerator door opening and closing cycle, the drive motor is started to rotate forward, and when the refrigerator door passes the photoelectric sensor corresponding to the third angle for the first time, the drive motor speed is reduced to a first set threshold; when the refrigerator door passes the photoelectric sensor corresponding to the fourth angle for the first time, the drive motor speed is reduced to a second set threshold; when the refrigerator door passes the photoelectric sensor corresponding to the sixth angle for the first time, the drive motor is stopped and timing is started, and when the timing reaches the first set time period, the drive motor is started and reversed; when the refrigerator door passes the photoelectric sensor corresponding to the fifth angle again, the drive motor speed is reduced to a second set threshold; when the refrigerator door passes the photoelectric sensor corresponding to the third angle again, the drive motor is stopped and timing is started again, and when the timing reaches the set second set time period, the drive motor is started again and rotated forward, and the next complete refrigerator door opening and closing cycle begins.

2. The refrigerator door opening and closing test device according to claim 1, characterized in that: The limiting plate is fixedly connected to the lower part of the frame, and the suction cup component is fixedly connected to the middle part of the frame.

3. The refrigerator door opening and closing test device according to claim 1, characterized in that: The execution terminal comprises a terminal seat (411) and a connecting piece (412), wherein the terminal seat is hinged to the transmission rod, and the connecting piece is detachably fixedly connected to the terminal seat, and the connecting piece is a suction cup or a clamp.

4. The refrigerator door opening and closing test device according to claim 1, characterized in that: The surface of the rotating shaft is provided with a plurality of grooves (521) along the axial direction, the transmission rod is sleeved on the surface of the rotating shaft, a through hole (421) corresponding to the groove is provided at the connection between the transmission rod and the rotating shaft, a connecting column (422) matching the groove is provided between the rotating shaft and the transmission rod, and the connecting column passes through the through hole and is inserted into the groove.

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