Modular household / commercial refrigerator freezer performance laboratory

Abstract

The modularly designed household / commercial refrigerator and freezer performance laboratory comprises a plurality of experiment tables, foundations at the experiment tables are located in ground pits, and each experiment table is installed in the foundation through a lifting device; partition plates are arranged on the two sides of the experiment table, a support installed on the ground is arranged on the back of the experiment table, a transverse sliding rail is installed on the upper portion of the support, pulleys or idler wheels are installed at the upper ends of the partition plates and movably installed in the sliding rail, the partition plates are hung on the sliding rail through the pulleys or the idler wheels, and the pulleys or the idler wheels can slide or roll in the sliding rail. The partition plate can be driven to move and rotate. According to the invention, the lifting experiment table is adopted, so that the carrying work when a tested sample is placed is avoided, and the possibility that the sample and the experiment table are scraped and damaged is eliminated while labor is saved. According to the scheme, through the hidden modular design experiment table, the refrigerator / freezer performance test and the door opening and closing test are integrated, and the dismounting and mounting work is greatly simplified when the test types are switched.

Description

Technical Field

[0001] This invention relates to the technical field of refrigerator and freezer door opening and closing test devices, specifically a modularly designed performance laboratory for household / commercial refrigerators and freezers. Background Technology

[0002] To save on laboratory construction costs, many testing organizations integrate commercial and residential refrigerator / freezer laboratories into a single, convertible residential / commercial refrigerator / freezer performance laboratory (hereinafter referred to as residential / commercial refrigerator / freezer performance laboratory). To simultaneously meet the testing requirements of both types of refrigerators / freezers, the laboratory must meet the following requirements: 1) According to the standard requirements, the test platform for household refrigerator performance testing must be at least 10cm above the ground, and the air under the test platform must be able to flow freely. The sample to be tested must be moved to the test platform for performance testing.

[0003] Each test bench requires two adjustable vertical panels, each 30cm wide and flush with the back panel, on both sides. The common method is to fix them to the back panel of the test bench by means of a slide rail or to hang them on the back panel by means of a top hook.

[0004] 2) When testing the performance of enclosed commercial freezers, a door opening and closing test is required. When conducting the door opening and closing test, the test bench needs to be removed and the door opening and closing test device needs to be installed.

[0005] Objective drawbacks of existing technologies: 1) When testing the performance of household refrigerators, the test platform is higher than the ground. When placing large-capacity refrigerators, it is difficult to move them and they are prone to scratching and damaging the samples and the test platform. The partitions on both sides of the test platform are not convenient to remove or store.

[0006] 2) When testing the performance of a closed commercial freezer, the original test bench needs to be removed and a door opening and closing test device needs to be installed. When testing the performance of a household refrigerator, the door opening and closing test device needs to be removed and the test bench restored, which is time-consuming and labor-intensive.

[0007] Currently, there are mature door opening and closing test devices on the market. These devices are not part of the laboratory itself. When using them, it is necessary to either modify a certain station in the laboratory to install the door opening and closing test device (mainly for situations where door opening and closing operations are required during performance testing), or to move the sample out of the laboratory and conduct door opening and closing tests on a separate door opening and closing test device (mainly for door opening and closing durability testing). Summary of the Invention

[0008] To overcome the shortcomings of existing technologies, this invention provides a modularly designed performance laboratory for household / commercial refrigerators and freezers.

[0009] This invention is achieved through the following technical solution: A modular design for a performance laboratory for household / commercial refrigerators and freezers, comprising several test benches, characterized in that: the foundation of the test benches is located in a ground depression, and each test bench is installed in the foundation via a lifting device; The experimental table has partitions on both sides, and supports mounted on the ground on the back or sides. Horizontal slide rails are installed on the upper part of the supports, and pulleys or rollers are installed on the upper part of the partitions. The pulleys or rollers are movably installed in the slide rails, and the partitions are suspended on the slide rails by the pulleys or rollers. The pulleys or rollers can slide or roll in the slide rails, driving the partitions to move and rotate.

[0010] More preferably, the lifting device uses several hydraulic cylinders, pneumatic cylinders, or electric cylinders.

[0011] In a further preferred embodiment, each test bench is equipped with a cross-shaped concave buckle driven by a servo motor at the bottom, and a vertical transmission column with a cross-shaped convex buckle can be inserted into the cross-shaped concave buckle.

[0012] In a further preferred embodiment, the transmission column includes an outer cylinder and an inner shaft nested together, with a bearing installed between the outer cylinder and the inner shaft. The lower end of the inner shaft is fixedly connected to a cross-shaped buckle, and the lower end of the outer cylinder is fixed to the surface of the test bench by bolts or by a clamp. The upper end of the inner shaft is higher than the outer cylinder.

[0013] More preferably, when used to operate the hinged door of a refrigerator, a horizontal transmission arm is installed on the inner shaft of the transmission column. One end of the transmission arm is installed on the inner shaft of the transmission column by a clamp and locked with bolts or a lock, and the height of the transmission arm can be adjusted by loosening the bolts or locks. A connecting device is installed on the other end of the transmission arm. The connecting device is used to connect to the cabinet door of the sample being tested and drive the hinged door of the sample being tested to open and close. The connecting device adopts a buckle, magnet, suction cup or pull rope. The inner shaft of the transmission column is driven to rotate by a servo motor at the bottom of the cross-shaped buckle. The inner shaft of the transmission column drives the transmission arm to rotate, thereby driving the hinged door of the sample being tested to open and close.

[0014] In a further preferred embodiment, when used to operate the horizontal sliding door of the freezer, a horizontal guide rail slide is installed on the upper part of the outer cylinder of the two vertical transmission columns on the left and right sides of the experimental table via clamps and locked with bolts or locks; a guide rail and a slider are installed on the guide rail slide, and a connecting device is installed below the slider to connect to the handle of the horizontal sliding door of the freezer, so that the horizontal sliding door can slide left and right to open or close the door; the connecting device can be a buckle, magnet, suction cup or pull rope; a motion device for driving the slider is installed on the guide rail slide or transmission column, and the motion device can be a synchronous belt assembly, a lead screw and nut pair or a gear and rack pair.

[0015] In a further preferred embodiment, when the motion device on the transmission column adopts a synchronous belt assembly, the two gears sleeved at both ends of the synchronous belt are respectively fixedly connected to the upper ends of the inner shafts of the left and right transmission columns. The servo motors at the lower ends of the inner shafts of the two transmission columns rotate synchronously, thereby driving the synchronous belt to reciprocate. A certain point of the synchronous belt is connected to the slider on the slide rail, thereby driving the slider to open or close the sliding door of the freezer of the sample being tested.

[0016] In a further preferred embodiment, when operating the upward-opening cabinet door of the freezer, a rotatable horizontal transmission rod is installed on the upper part of the two vertical transmission columns on the left and right sides of the experimental table. A transmission arm is vertically installed on the transmission rod. One end of the transmission arm is installed on the transmission rod by a clamp, and a connecting device is installed on the other end of the transmission arm. The connecting device is used to connect to the upward-opening cabinet door of the sample being tested, thereby driving the cabinet door to open and close. The connecting device adopts a buckle, magnet, suction cup or pull rope. The transmission arm rotates with the transmission rod, thereby swinging up and down to open or close the cabinet door.

[0017] In a further preferred embodiment, the horizontal transmission rod also includes an outer cylinder and an inner shaft nested together, with a bearing installed between the outer cylinder and the inner shaft. The transmission arm is fixed to the inner shaft of the horizontal transmission rod by a clamp. The outer cylinder of the horizontal transmission rod has an opening in the middle to accommodate the rotation range of the transmission arm, or the outer cylinder is divided into left and right sections located on the left and right sides of the transmission arm. The outer cylinders of the two vertical transmission columns are fixedly mounted on the upper part of the outer cylinders of the horizontal transmission rod by clamps. The upper part of the inner shafts of the two vertical transmission columns is fixedly mounted with bevel gears. The two ends of the inner shaft of the horizontal transmission rod are also fixedly mounted with bevel gears. The bevel gears on the inner shaft of the transmission rod mesh with the bevel gears on the inner shaft of the transmission column. The servo motors at the lower ends of the inner shafts of the two transmission columns rotate synchronously and in opposite directions, thereby driving the inner shaft of the horizontal transmission rod and the transmission arm to rotate by a certain angle.

[0018] Furthermore, a pressure-resistant sensing strip is installed under the tabletop of the experimental platform.

[0019] The beneficial effect of this invention is that by using a lifting experimental platform, the lifting work when placing the sample to be tested is avoided, which saves effort and eliminates the possibility of scratching and damage to the sample and the experimental platform.

[0020] This solution integrates refrigerator / freezer performance testing and door opening / closing testing into one through a hidden modular design of the test bench. It greatly simplifies disassembly and installation when switching test types, significantly improving work efficiency and expanding the applicability of the test bench. Attached Figure Description

[0021] The attached figure is a schematic diagram of the structure of the present invention.

[0022] Figure 1 This is a top view of the laboratory. Figure 2 This is the main view of the laboratory. Figure 3 This is the main view of the swing door opening and closing transmission module. Figure 4 This is a top view of a hinged door refrigerator / freezer opening and closing (A is when the door is open, B is when the door is closed). Figure 5 This is the main view of the horizontal sliding door opening and closing transmission module. Figure 6 for Figure 5 Left view, Figure 7 This is a front view of a horizontal sliding door freezer opening and closing. Figure 8 This is the main view of the upward-opening door transmission module. Figure 9 This is a top view of the upward-opening door transmission module. Figure 10 This is a side view of a freezer with an upward-opening door (A is when the door is open, B is when the door is closed).

[0023] In the diagram: 1. Experimental platform (modular raised floor), 2. Partition, 3. Support, 4. Slide rail, 5. Pulley or roller, 6. Hydraulic cylinder (hydraulic jack), 7. Cross-shaped concave buckle, 8. Cross-shaped convex buckle, 9. Transmission column, 10. Servo motor, 11. Transmission arm, 12. Clamp, 13. Buckle, 14. Pull rope, 15. Swing door, 16. Guide rail slide, 17. Slider, 18. Horizontal sliding door, 19. Horizontal transmission rod, 20. Top-opening cabinet door, 21. Pressure sensor strip, 22. Outer cylinder, 23. Inner shaft, 24. Bevel gear, 25. Suction cup, 26. Gear, 27. Synchronous belt, 28. Guide rail. Detailed Implementation

[0024] The attached figure shows a specific embodiment of the present invention.

[0025] The modular design of the performance laboratory for household / commercial refrigerators and freezers of the present invention includes several test benches 1, the foundation of the test benches is located in a ground pit, and each test bench is installed in the foundation by a lifting device. The experimental table has partitions 2 on both sides, and supports 3 installed on the ground on the back or sides of the experimental table. A horizontal slide rail 4 is installed on the upper part of the support. A pulley or roller 5 is installed on the upper part of the partition. The pulley or roller is movably installed in the slide rail. The partition is suspended on the slide rail by the pulley or roller. The pulley or roller can slide or roll in the slide rail, which can drive the partition to move and rotate.

[0026] The lifting device uses several hydraulic cylinders, pneumatic cylinders, or electric cylinders.

[0027] Each test bench is equipped with a cross-shaped concave buckle 7 driven by a servo motor 10 at the bottom. A vertical transmission column 9 with a cross-shaped convex buckle 8 can be inserted into the cross-shaped concave buckle.

[0028] The transmission column includes an outer cylinder 22 and an inner shaft 23 nested together. A bearing is installed between the outer cylinder and the inner shaft. The lower end of the inner shaft is fixedly connected to a cross-shaped buckle 8. The lower end of the outer cylinder is fixed to the surface of the test bench by bolts or by a clamp. The upper end of the inner shaft is higher than the outer cylinder.

[0029] When used to operate the hinged door of a refrigerator, a horizontal transmission arm 11 is installed on the inner shaft 23 of the transmission column 9. One end of the transmission arm is installed on the inner shaft of the transmission column by a clamp 12 and locked with bolts or a lock. The height of the transmission arm can be adjusted by loosening the bolts or locks. A connecting device is installed on the other end of the transmission arm. The connecting device is used to connect to the cabinet door of the sample being tested and drive the hinged door 15 of the sample being tested to open and close. The connecting device uses a buckle 13, a magnet, a suction cup, or a pull rope 14. The inner shaft of the transmission column is driven to rotate by a servo motor at the bottom of the cross-shaped buckle. The rotation of the inner shaft of the transmission column drives the transmission arm 11 to rotate, thereby driving the hinged door of the sample being tested to open and close.

[0030] The servo motor can be programmed to rotate clockwise or counterclockwise by a certain angle as needed, which in turn drives the inner shaft of the transmission column to rotate by a certain angle, thereby driving the transmission arm to rotate and swing by a certain angle, and driving the swing door of the sample to be tested to open and close.

[0031] When used to operate the horizontal sliding door of the freezer, a horizontal guide rail slide 16 is installed on the upper part of the outer cylinder 22 of the two vertical transmission columns 9 on the left and right sides of the experimental table through clamps and locked with bolts or locks; a guide rail 28 and a slider 17 that cooperate with each other are installed on the guide rail slide, and a connecting device is installed under the slider to connect to the handle of the horizontal sliding door 18 of the freezer, so that the horizontal sliding door can slide left and right to open or close the door; the connecting device adopts a buckle 13, a magnet, a suction cup or a pull rope 14; a motion device for driving the slider is installed on the guide rail slide or transmission column, and the motion device can adopt a synchronous belt assembly, a lead screw and nut pair or a gear and rack pair.

[0032] When the motion device on the transmission column 9 uses a synchronous belt assembly, the two gears 26 sleeved at both ends of the synchronous belt 27 are fixedly connected to the upper ends of the inner shafts of the left and right transmission columns, respectively. The servo motors at the lower ends of the inner shafts of the two transmission columns rotate synchronously, thereby driving the synchronous belt to reciprocate. A certain point of the synchronous belt is connected to the slider on the slide rail, thereby driving the slider to open or close the sliding door of the freezer of the sample being tested.

[0033] The servo motor can be programmed to rotate clockwise or counterclockwise by a certain angle as needed, which in turn drives the inner shaft of the transmission column to rotate by a certain angle, thereby driving the synchronous belt and slider to move left and right. The slider and suction cup then drive the sliding door of the freezer containing the sample being tested to open and close.

[0034] When operating the upward-opening cabinet door of the freezer, a rotatable horizontal transmission rod 19 is installed on the upper part of the two vertical transmission columns 9 on the left and right sides of the experimental table. A transmission arm 11 is vertically installed on the transmission rod. One end of the transmission arm is installed on the horizontal transmission rod by a clamp, and the other end of the transmission arm is installed with a connecting device. The connecting device is used to connect to the upward-opening cabinet door 20 of the sample being tested, thereby driving the cabinet door to open and close. The connecting device adopts a buckle 13, a magnet, a suction cup, or a pull rope 14. The transmission arm rotates with the transmission rod, thereby swinging up and down to open or close the cabinet door.

[0035] The horizontal transmission rod 19 also includes an outer cylinder 22 and an inner shaft 23 nested together. A bearing is installed between the outer cylinder and the inner shaft. The transmission arm 11 is fixed to the inner shaft of the horizontal transmission rod by a clamp. The outer cylinder of the horizontal transmission rod has an opening in the middle to accommodate the rotation range of the transmission arm, or the outer cylinder is divided into left and right sections located on the left and right sides of the transmission arm. The outer cylinders of the two vertical transmission columns are fixedly installed on the upper part of the outer cylinders 22 by clamps. The upper part of the inner shafts of the two vertical transmission columns 9 is fixedly installed with bevel gears 24. The inner shafts of the horizontal transmission rod are also fixedly installed with bevel gears 24. The bevel gears of the inner shaft of the transmission rod mesh with the bevel gears of the inner shaft of the transmission column. The servo motors at the lower ends of the inner shafts of the two transmission columns rotate synchronously and in opposite directions, thereby driving the inner shaft of the horizontal transmission rod and the transmission arm to rotate by a certain angle.

[0036] The servo motor can be programmed to rotate clockwise or counterclockwise by a certain angle as needed, which in turn drives the inner shaft of the transmission column to rotate by a certain angle, thereby driving the inner shaft of the horizontal transmission rod to rotate by a certain angle, which in turn drives the transmission arm to rotate and swing up and down by a certain angle, thus driving the upward side door of the sample to open and close.

[0037] Pressure-resistant sensing strip 21 is installed under the tabletop of the experimental platform.

[0038] Pressure-sensitive strips are safety devices based on pressure sensing technology. They are primarily used to detect contact or squeezing actions and trigger protective mechanisms to prevent personal injury or equipment damage. Their core function is to sense changes in external pressure, respond promptly, and interrupt dangerous actions.

[0039] Main functions: Anti-pinch / anti-pressure protection: When the sensor strip is subjected to external pressure (such as when a part of the human body is clamped), it will immediately output a signal to stop or reverse the movement of the equipment (such as doors, gates, robots), avoiding accidents such as crushing injuries and shearing injuries. Reduced false alarms: Pressure sensing can directly identify the "contact with obstacle" state, improving response accuracy.

[0040] This solution utilizes a modular, height-adjustable raised floor. When placing the sample, the test platform is flush with the ground. The sample can be pushed onto the platform, and once in place, the platform is raised to the designated height. The platform's height is primarily achieved through hydraulic devices (hydraulic cylinders and hydraulic jacks). Under normal conditions, the platform is flush with the ground, facilitating sample placement. At the start of the test, the platform is raised to the required standard height, eliminating the need for lifting and avoiding the risk of impact. The modular raised floor can be raised by 0.1 meters.

[0041] This design redesigns the placement of the partitions on both sides of the test bench. A bracket is used to install slide rails above, suspending the partitions on these rails. The position of the partitions can be adjusted by sliding them, and the partitions themselves can also rotate 360° to adjust their angle. When conducting commercial freezer tests, the partitions can be easily slid to the sides or other positions that do not interfere with the test, saving time and effort.

[0042] This solution incorporates servo motor-driven cross-shaped buckles on each test bench. These buckles can be inserted into transmission columns with cross-shaped convex buckles, causing the transmission arm, transmission rod, or guide rail slide to swing or slide back and forth, thus opening and closing the door of the sample under test. A single transmission column can perform door opening and closing tests on hinged-door refrigerators / freezers. A combination of two transmission columns can perform door opening and closing tests on horizontal sliding-door freezers and top-opening freezers.

[0043] The test bench can be made of 1-4mm thick steel plate, with a fixed angle steel support frame or channel steel support frame underneath. The inner shaft of the transmission column 9 can be made with grooves, like a gear, for gear meshing transmission, with the longitudinal shaft driving the transverse shaft to rotate.

Claims

1. A modularly designed performance laboratory for household / commercial refrigerators and freezers, comprising several test benches, characterized in that: The foundation for the experimental platform is located in a depression in the ground, and each experimental platform is installed in the foundation via a lifting device. The experimental table has partitions on both sides, and supports mounted on the ground on the back or sides. Horizontal slide rails are installed on the upper part of the supports, and pulleys or rollers are installed on the upper part of the partitions. The pulleys or rollers are movably installed in the slide rails, and the partitions are suspended on the slide rails by the pulleys or rollers. The pulleys or rollers can slide or roll in the slide rails, driving the partitions to move and rotate.

2. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 1, characterized in that: The lifting device uses several hydraulic cylinders, pneumatic cylinders, or electric cylinders.

3. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 1, characterized in that: Each test bench is equipped with a cross-shaped concave buckle driven by a servo motor at the bottom. A vertical transmission column with a cross-shaped convex buckle can be inserted into the cross-shaped concave buckle.

4. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 3, characterized in that: The transmission column includes an outer cylinder and an inner shaft nested together. A bearing is installed between the outer cylinder and the inner shaft. The lower end of the inner shaft is fixedly connected to a cross-shaped buckle. The lower end of the outer cylinder is fixed to the surface of the test bench by bolts or by a clamp. The upper end of the inner shaft is higher than the outer cylinder.

5. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 3, characterized in that: When used to operate the hinged door of a refrigerator, a horizontal transmission arm is installed on the inner shaft of the transmission column. One end of the transmission arm is mounted on the inner shaft of the transmission column by a clamp and locked with bolts or a lock. The height of the transmission arm can be adjusted by loosening the bolts or locks. A connecting device is installed at the other end of the transmission arm. The connecting device is used to connect to the cabinet door of the sample being tested, thereby driving the hinged door of the sample being tested to open and close. The connecting device can be a buckle, magnet, suction cup, or pull rope. The inner shaft of the transmission column is driven to rotate by a servo motor at the bottom of the cross-shaped buckle. The inner shaft of the transmission column drives the transmission arm to rotate, thereby driving the hinged door of the sample being tested to open and close.

6. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 3, characterized in that: When used to operate the horizontal sliding door of the freezer, a horizontal guide rail slide is installed on the upper part of the outer cylinder of the two vertical transmission columns on the left and right sides of the experimental table through clamps and locked with bolts or locks; the guide rail and slider are installed on the guide rail slide, and a connecting device is installed under the slider to connect to the handle of the horizontal sliding door of the freezer, so that the horizontal sliding door can slide left and right to open or close the door; the connecting device can be a buckle, magnet, suction cup or pull rope; a motion device for driving the slider is installed on the guide rail slide or transmission column, and the motion device can be a synchronous belt assembly, a lead screw and nut pair or a gear and rack pair.

7. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 6, characterized in that: When the motion device on the transmission column uses a synchronous belt assembly, the two gears at both ends of the synchronous belt are fixedly connected to the upper ends of the inner shafts of the left and right transmission columns, respectively. The servo motors at the lower ends of the inner shafts of the two transmission columns rotate synchronously, thereby driving the synchronous belt to reciprocate. A certain point of the synchronous belt is connected to the slider on the slide rail, thereby driving the slider to open or close the sliding door of the freezer containing the sample being tested.

8. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 3, characterized in that: When operating the top-opening cabinet door of the freezer, a rotatable horizontal transmission rod is installed on the upper part of the two vertical transmission columns on the left and right sides of the experimental table. A transmission arm is vertically installed on the transmission rod. One end of the transmission arm is installed on the transmission rod by a clamp, and the other end of the transmission arm is installed with a connecting device. The connecting device is used to connect to the top-opening cabinet door of the sample being tested, thereby driving the cabinet door to open and close. The connecting device adopts a buckle, magnet, suction cup or pull rope. The transmission arm rotates with the transmission rod, thereby swinging up and down to open or close the cabinet door.

9. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 8, characterized in that: The horizontal transmission rod also includes an outer cylinder and an inner shaft nested together. Bearings are installed between the outer cylinder and the inner shaft. The transmission arm is fixed to the inner shaft of the horizontal transmission rod by clamps. The outer cylinder of the horizontal transmission rod has an opening in the middle to accommodate the rotation range of the transmission arm, or the outer cylinder is divided into left and right sections located on the left and right sides of the transmission arm. The outer cylinders of the two vertical transmission columns are fixedly mounted on the upper part of the outer cylinders of the horizontal transmission rod by clamps. The upper part of the inner shafts of the two vertical transmission columns is fixedly mounted with bevel gears. The two ends of the inner shaft of the horizontal transmission rod are also fixedly mounted with bevel gears. The bevel gears on the inner shaft of the transmission rod mesh with the bevel gears on the inner shaft of the transmission column. The servo motors at the lower ends of the inner shafts of the two transmission columns rotate synchronously and in opposite directions, thereby driving the inner shaft of the horizontal transmission rod and the transmission arm to rotate by a certain angle.

10. The modular design of the performance laboratory for household / commercial refrigerators and freezers according to claim 1, characterized in that: Pressure-resistant sensing strips are installed under the tabletop of the experimental platform.

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