Constant-temperature test box

Abstract

The utility model relates to the technical field of test boxes, and discloses a constant-temperature test box which comprises a box body, and a placing plate is arranged in the box body in a sliding manner; a power mechanism for driving the placing plate to slide is mounted on the box body; an electric push rod is fixed at the top of the box body; a telescopic shaft of the electric push rod is coaxially and fixedly connected with a disc; three digital heaters are vertically arranged between the disc and the placing plate and are uniformly distributed along the circumferential direction of the disc; a transmission assembly for driving the digital heater to translate in the radial direction of the disc is arranged between each digital heater and the disc, and each digital heater is in transmission fit with the disc through the corresponding transmission assembly; and the bottom end of each digital heater is in limiting sliding fit with the bottom of the box body. According to the utility model, the electric appliance can be uniformly heated, and the electric appliance can be positioned in a temperature field of the three digital heaters close to the test temperature as much as possible through the movement of the three digital heaters, so that the deviation of the test result is reduced, and the test data precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of test chamber technology, and in particular to a constant temperature test chamber. Background Technology

[0002] A constant temperature test chamber is a device that provides a stable temperature environment for testing various electrical products to evaluate their performance, assess their reliability, and verify their material properties.

[0003] A walk-in constant temperature and humidity test chamber, disclosed in announcement number CN213315031U, includes a transparent square chamber, a resistance wire digital heater located on the left side of the chamber's inner cavity, and a digital humidifier also located on the left side of the chamber's inner cavity. The chamber has an opening at its right end, and a door is hinged to the upper right side of the chamber. It also includes a feeding mechanism installed inside the chamber that can move threadedly to the left. This feeding mechanism can gradually move the test product to the left to progressively increase the temperature. When the digital heater and digital humidifier are turned on, heating and humidification are initiated. Turning the crank causes the threaded rod to rotate, moving the slider, tray, and electronic components on the tray slowly to the left, gradually approaching the digital heater and digital humidifier. As the product approaches, both temperature and humidity slowly increase.

[0004] Based on the above technical features, the problem is that in the existing technology, there is only one digital heater. Therefore, the temperature environment of the appliance near the digital heater is different from that of the appliance far from the digital heater. This can easily lead to uneven heating of the appliance, resulting in deviations in the test results and inaccurate test data.

[0005] Therefore, it is necessary to solve the above problems by using a constant temperature test chamber. Utility Model Content

[0006] The purpose of this invention is to provide a constant temperature test chamber to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a constant temperature test chamber, including a chamber body, a placement plate slidably installed inside the chamber body, and electrical appliances placed on the placement plate; a power mechanism for driving the placement plate to slide horizontally is installed on the chamber body;

[0008] A vertically mounted electric push rod is fixedly installed on the top of the box. The telescopic shaft of the electric push rod is vertically downward and coaxially fixedly connected to the disc. The disc is located inside the box, and the placement plate is located below the disc.

[0009] Three digital heaters are vertically placed between the disk and the placement plate, and the three digital heaters are evenly distributed along the circumference of the disk.

[0010] Each digital heater is connected to the disk by a transmission component that drives the digital heater to translate radially along the disk. Each digital heater is driven by the corresponding transmission component to cooperate with the disk.

[0011] The bottom of each digital heater is in sliding engagement with the bottom limit of the housing.

[0012] Preferably, the transmission assembly includes a transmission rod; a first hinge seat is fixedly installed on the top of the digital heater, and a second hinge seat is installed on the disc; one axial end of the transmission rod is hinged to the first hinge seat, and the other axial end is hinged to the second hinge seat.

[0013] Preferably, three guide blocks are provided on the bottom inner wall of the housing, and each guide block has a waist-shaped groove opened along the radial direction of the disc; the three digital heaters correspond one-to-one with the three guide blocks, and the bottom end of each digital heater is limited and slidably engaged with the waist-shaped groove of the corresponding guide block.

[0014] Preferably, the power mechanism includes a threaded rod; a guide groove is provided on the bottom inner wall of the housing along the radial direction of the disc, a slider is slidably installed in the guide groove, and the slider is fixedly connected to the placement plate; the threaded rod is rotatably installed in the guide groove along the radial direction of the disc, the threaded rod passes through the slider and is threadedly connected to the slider; a motor is fixedly installed on the housing, and the output shaft of the motor is coaxially fixedly connected to the threaded rod.

[0015] Preferably, one of the waist-shaped grooves is located on the radial extension line of the guide groove along the disk, and this waist-shaped groove is a limiting groove; the guide block where the limiting groove is located is a fixed block, and the fixed block is fixed on the bottom inner wall of the box; the other two waist-shaped grooves are symmetrically arranged with respect to the limiting groove, and both waist-shaped grooves are transmission grooves; the guide blocks where the two transmission grooves are located are push blocks, and the two push blocks are limited and slidably installed on the bottom inner wall of the box; the box is equipped with a linkage mechanism that drives the two push blocks to slide along the circumference of the disk closer to or away from the fixed block, and the two push blocks are driven by the slider through the linkage mechanism.

[0016] Preferably, the linkage mechanism includes a linkage component and a guide component; the linkage component is used to drive the two push blocks to slide along the guide component, and the linkage component is in transmission cooperation with the slider.

[0017] Preferably, the guide assembly includes two arc-shaped grooves and one annular groove. The two arc-shaped grooves are both formed along the circumference of the disk on the bottom inner wall of the housing. The arc openings of the two arc-shaped grooves face each other, and a movable block is slidably installed in each arc-shaped groove. The two arc-shaped grooves correspond one-to-one with two push blocks, and each push block is fixedly connected to the movable block in the corresponding arc-shaped groove. The annular groove is formed along the circumference of the disk, and each second hinge seat is slidably engaged with the annular groove.

[0018] Preferably, the linkage assembly includes a transmission plate and two gears; the two gears are rotatably mounted on the bottom inner wall of the housing, and a connecting block is fixedly installed on each gear; a connecting groove is formed in each connecting block along the radial direction of the gear; two push blocks correspond one-to-one with the two connecting blocks, and each push block is inserted into the connecting groove of the corresponding connecting block and slides in a limiting fit with the connecting groove; the transmission plate is located between the two gears and is fixedly connected to the slider; two racks are fixedly installed on the transmission plate, and the two gears correspond one-to-one with the two racks, with each gear meshing with the corresponding rack.

[0019] Preferably, the box body has an opening along the sliding direction of the placement plate, and a box door is installed at the opening; the box door has an observation opening, and an observation window is fixedly installed at the observation opening.

[0020] Preferably, an industrial control box is fixedly installed on the housing, and a controller is installed inside the industrial control box; the motor, electric push rod and all digital heaters are electrically connected to the controller.

[0021] The technical effects and advantages of this utility model are as follows: The three digital heaters of this utility model are evenly distributed along the circumference of the disk, and the three digital heaters can slide along the radial direction of the disk. At the same time, the electrical appliance is located between the three digital heaters, which can not only make the electrical appliance heated evenly, but also make the electrical appliance as close as possible to the temperature field of the three digital heaters and the test temperature through the movement of the three digital heaters, thereby reducing the deviation of the test results and improving the accuracy of the test data. Attached Figure Description

[0022] Fig. 1 This is a three-dimensional structural diagram of the present invention;

[0023] Fig. 2 This is a top view of the interior of the housing of this utility model;

[0024] Fig. 3 This is a schematic diagram of the interior of the housing of this utility model;

[0025] Fig. 4 This is a schematic half-sectional view of the present invention.

[0026] In the diagram: 1. Box body; 2. Box door; 3. Observation window; 4. Industrial control box; 5. Motor; 6. Threaded rod; 7. Slider; 8. Guide groove; 9. Transmission plate; 10. Gear; 11. Connecting block; 12. Placement plate; 13. Push block; 14. Transmission groove; 15. Moving block; 16. Arc groove; 17. Fixed block; 18. Limiting groove; 19. Slide seat; 20. Digital heater; 21. First hinge seat; 22. Transmission rod; 23. Second hinge seat; 24. Disc; 25. Annular groove; 26. Electric push rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] This utility model provides, for example Figs. 1 to 4 The temperature control chamber shown includes a chamber body 1, with an opening at the front end of the chamber body 1 and a door 2 installed at the opening. An observation port is provided on the door 2, and an observation window 3 is fixedly installed at the observation port.

[0029] An electrical appliance placement plate 12 is slidably installed inside the housing 1. The placement plate 12 slides back and forth in the horizontal direction, and a power mechanism for driving the sliding of the placement plate 12 is installed on the housing 1.

[0030] Specifically, the power mechanism includes a threaded rod 6. A guide groove 8 is horizontally formed on the bottom inner wall of the housing 1, and a slider 7 is slidably mounted within the guide groove 8. The top of the slider 7 is fixedly connected to the bottom of the placement plate 12. The threaded rod 6 is horizontally positioned within the guide groove 8 and rotatably connected to the housing 1.

[0031] The threaded rod 6 passes through the slider 7 and is threadedly connected to the slider 7. A motor 5 is fixedly mounted at the front end of the housing 1, and the output shaft of the motor 5 is coaxially and fixedly connected to the threaded rod 6. The motor 5 is located below the housing door 2.

[0032] A vertically mounted electric push rod 26 is fixedly installed on the top of the housing 1. The telescopic shaft of the electric push rod 26 points vertically downward and is coaxially fixedly connected to the disc 24. The disc 24 is located inside the housing 1, and the placement plate 12 is located below the disc 24. In this embodiment, the placement plate 12 is a circular plate. During the test, the placement plate 12 is located directly below the disc 24 and coaxially aligned.

[0033] Three digital heaters 20 are vertically placed between the disc 24 and the placement plate 12, and the three digital heaters 20 are evenly distributed along the circumference of the disc 24.

[0034] An industrial control box 4 is fixedly installed on the outer wall of the housing 1, and a controller is installed inside the industrial control box 4. The motor 5, the electric push rod 26, and all the digital heaters 20 are electrically connected to the controller. In this embodiment, the industrial control box 4 is a PLC control box, that is, the controller is a PLC, which is all prior art.

[0035] Each digital heater 20 is provided with a transmission component between it and the disk 24 to drive the digital heater 20 to translate radially along the disk 24. Each digital heater 20 is driven to cooperate with the disk 24 through the corresponding transmission component.

[0036] Specifically, the transmission assembly includes a transmission rod 22. A first hinge seat 21 is fixedly mounted on the top of the digital heater 20, and a second hinge seat 23 is mounted on the disk 24. One axial end of the transmission rod 22 is hinged to the first hinge seat 21, and the other axial end is hinged to the second hinge seat 23.

[0037] Each digital heater 20 has a fixed slide 19 at its bottom end, and each slide 19 is in sliding engagement with the bottom limit of the housing 1.

[0038] Specifically, three guide blocks are provided on the bottom inner wall of the housing 1, and each guide block has a waist-shaped groove opened along the radial direction of the disc 24. The three digital heaters 20 correspond one-to-one with the three guide blocks, and the slide seat 19 at the bottom of each digital heater 20 is inserted downward into the waist-shaped groove of the corresponding guide block and is limited and slidably engaged with the waist-shaped groove of the corresponding guide block.

[0039] The guide groove 8 is arranged radially along the disk 24, and one of the waist-shaped grooves is located on the extension line of the guide groove 8 along the radial direction of the disk 24. This waist-shaped groove is a limiting groove 18. The guide block where the limiting groove 18 is located is a fixing block 17, which is fixed to the bottom inner wall of the box 1. The guide groove 8 is located between the limiting groove 18 and the box opening.

[0040] The other two waist-shaped grooves are symmetrically arranged relative to the limiting groove 18, and both waist-shaped grooves are transmission grooves 14. The guide blocks where the two transmission grooves 14 are located are push blocks 13, and the two push blocks 13 are slidably installed on the bottom inner wall of the housing 1.

[0041] The housing 1 is equipped with a linkage mechanism that drives two push blocks 13 to slide around the circumference of the disc 24 to approach or move away from the fixed block 17. The two push blocks 13 are connected to the slider 7 through the linkage mechanism.

[0042] Specifically, the linkage mechanism includes a linkage component and a guide component. The linkage component drives the two push blocks 13 to slide along the guide component, and the linkage component is in transmission engagement with the slider 7.

[0043] The guide assembly includes two arc-shaped grooves 16 and one annular groove 25. Both arc-shaped grooves 16 are formed along the circumference of the disc 24 on the bottom inner wall of the housing 1. The arc openings of the two arc-shaped grooves 16 are opposite each other and symmetrically arranged about the fixed block 17. A movable block 15 is slidably installed within each arc-shaped groove 16. Each arc-shaped groove 16 corresponds one-to-one with two push blocks 13, and each push block 13 is fixedly connected to the movable block 15 within its corresponding arc-shaped groove 16.

[0044] The annular groove 25 is formed on the side curved surface of the disk 24 along the circumference of the disk 24. The axial cross-section of the annular groove 25 is T-shaped, and each second hinge seat 23 is provided with an integrally formed T-shaped block. The T-shaped block of each second hinge seat 23 is located inside the annular groove 25 and matches the annular groove 25. The T-shaped block of each second hinge seat 23 is in a limiting sliding fit with the annular groove 25.

[0045] The linkage assembly includes a transmission plate 9 and two gears 10. Two vertical support shafts are fixedly installed on the bottom inner wall of the housing 1. The two support shafts correspond one-to-one with the two gears 10, and each gear 10 is rotatably sleeved on the corresponding support shaft.

[0046] Each gear 10 has a connecting block 11 fixedly installed on its top, and each connecting block 11 is rotatably connected to the support shaft on which the gear 10 is rotatably mounted. Each connecting block 11 has a connecting groove formed in the radial direction of the gear 10. Two push blocks 13 correspond one-to-one with two connecting blocks 11, and each push block 13 is inserted into the connecting groove of the corresponding connecting block 11 and slides in a limiting fit with the connecting groove.

[0047] The transmission plate 9 is located between the two gears 10 and is fixedly connected to the rear end face of the slider 7. Two racks are fixedly installed on the transmission plate 9, with the two gears 10 corresponding to the two racks one-to-one, and each gear 10 meshing with the corresponding rack.

[0048] Working Principle: When using this constant temperature test chamber to test electrical appliances, first, open the chamber door 2 and place the electrical appliance on the placement plate 12. Next, start the motor 5. The output shaft of the motor 5 drives the threaded rod 6 to rotate. The threaded rod 6 pushes the slider 7 to slide along the guide groove 8 from front to back. The slider 7 drives the placement plate 12 to move horizontally from front to back. The placement plate 12 moves the electrical appliance from front to back. When the placement plate 12 moves directly below the disc 24 and is aligned coaxially, turn off the motor 5.

[0049] As slider 7 slides along guide groove 8, it also pushes transmission plate 9 to move synchronously from front to right. During this process, transmission plate 9 drives two racks to synchronously approach and engage with corresponding gears 10. When the two racks engage with corresponding gears 10, they push corresponding gears 10 to rotate. The two gears 10 drive two connecting blocks 11 to rotate synchronously, and the two connecting blocks 11 push corresponding push blocks 13 to move synchronously away from fixed block 17. The two push blocks 13 push corresponding slide blocks 19 to move away from fixed block 17 via transmission groove 14, and the two slide blocks 19 drive corresponding digital heaters 20 to move away from fixed block 17.

[0050] At the same time, the two push blocks 13 drive the corresponding moving blocks 15 to slide away from the fixed block 17 along the arc groove 16.

[0051] When the two push blocks 13 push the corresponding slides 19 away from the fixed block 17 through the transmission groove 14, the digital heater 20 corresponding to the push block 13 drives the second hinge seat 23 to slide along the annular groove 25 through the corresponding first hinge seat 21 and transmission rod 22.

[0052] When the placement plate 12 is moved directly below the disk 24 and aligned coaxially, the three digital heaters 20 are evenly distributed around the circumference of the disk 24. At this time, the three digital heaters 20 are activated to heat up until the temperature reaches the test temperature and is maintained at the test temperature.

[0053] When it is necessary to change the distance between the three digital heaters 20 and the electrical appliance, the electric push rod 26 is activated. The telescopic shaft of the electric push rod 26 extends and retracts, thereby moving the disc 24 up and down. During this process, the disc 24 drives the three second hinge seats 23 to move up and down synchronously. The three second hinge seats 23 push the first hinge seats 21 to slide radially along the disc 24 towards or away from the electrical appliance via corresponding transmission rods 22. The three first hinge seats 21 drive the corresponding digital heaters 20 to slide radially along the disc 24 towards or away from the electrical appliance. The three digital heaters 20 drive the corresponding slides 19 to slide along the waist-shaped groove. This ensures that the electrical appliance is located as close as possible to the temperature field of the three digital heaters 20 and the test temperature.

[0054] After the test, turn off the three digital heaters 20 and restart motor 5. The output shaft of motor 5 reverses, causing the threaded rod 6 to reverse as well. The threaded rod 6 pushes the slider 7 to slide forward along the guide groove 8, and the slider 7 moves the placement plate 12 from back to front. The placement plate 12 moves the electrical appliance from back to front until it stops near the door 2. At this point, turn off motor 5, open the door 2, and remove the electrical appliance after it has cooled down.

[0055] When slider 7 slides forward along guide groove 8, it drives transmission plate 9 to move forward. Transmission plate 9 drives two racks to push corresponding gears 10 in reverse. At this time, digital heaters 20 corresponding to the two push blocks 13 move circumferentially along disk 24 towards fixed block 17 until the two racks disengage from corresponding gears 10.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A constant temperature test chamber, comprising a chamber body (1), characterized in that: The housing (1) has a sliding mounting plate (12) inside, and electrical appliances are placed on the mounting plate (12); the housing (1) is equipped with a power mechanism that drives the mounting plate (12) to slide in the horizontal direction. A vertical electric push rod (26) is fixedly installed on the top of the box (1). The telescopic shaft of the electric push rod (26) is vertically downward and coaxially fixedly connected to the disc (24). The disc (24) is located inside the box (1), and the placement plate (12) is located below the disc (24). Three digital heaters (20) are vertically placed between the disk (24) and the placement plate (12), and the three digital heaters (20) are evenly distributed along the circumference of the disk (24); A transmission component is provided between each digital heater (20) and the disk (24) to drive the digital heater (20) to translate radially along the disk (24). Each digital heater (20) is in transmission cooperation with the disk (24) through the corresponding transmission component. The bottom of each digital heater (20) is in a sliding fit with the bottom limit of the housing (1).

2. The constant temperature test chamber according to claim 1, characterized in that: The transmission assembly includes a transmission rod (22); a first hinge seat (21) is fixedly installed on the top of the digital heater (20), and a second hinge seat (23) is installed on the disc (24); one axial end of the transmission rod (22) is hinged to the first hinge seat (21), and the other axial end is hinged to the second hinge seat (23).

3. A constant temperature test chamber according to claim 2, characterized in that: Three guide blocks are provided on the bottom inner wall of the box (1), and each guide block has a waist-shaped groove opened along the radial direction of the disc (24); the three digital heaters (20) correspond one-to-one with the three guide blocks, and the bottom end of each digital heater (20) is limited and slidably engaged with the waist-shaped groove of the corresponding guide block.

4. A constant temperature test chamber according to claim 3, characterized in that: The power mechanism includes a threaded rod (6); a guide groove (8) is provided on the bottom inner wall of the housing (1) along the radial direction of the disc (24), and a slider (7) is slidably installed in the guide groove (8), and the slider (7) is fixedly connected to the placement plate (12); the threaded rod (6) is rotatably installed in the guide groove (8) along the radial direction of the disc (24), and the threaded rod (6) passes through the slider (7) and is threadedly connected to the slider (7); a motor (5) is fixedly installed on the housing (1), and the output shaft of the motor (5) is coaxially fixedly connected to the threaded rod (6).

5. A constant temperature test chamber according to claim 4, characterized in that: One of the waist-shaped grooves is located on the radial extension line of the guide groove (8) along the disk (24), and this waist-shaped groove is a limiting groove (18); the guide block where the limiting groove (18) is located is a fixing block (17), and the fixing block (17) is fixed on the bottom inner wall of the box (1); the other two waist-shaped grooves are symmetrically arranged relative to the limiting groove (18), and both waist-shaped grooves are transmission grooves (14); the guide blocks where the two transmission grooves (14) are located are push blocks (13), and the two push blocks (13) are limited and slidably installed on the bottom inner wall of the box (1); the box (1) is equipped with a linkage mechanism that drives the two push blocks (13) to slide along the circumference of the disk (24) to approach or move away from the fixing block (17), and the two push blocks (13) are driven and cooperated with the slider (7) through the linkage mechanism.

6. A constant temperature test chamber according to claim 5, characterized in that: The linkage mechanism includes a linkage component and a guide component; the linkage component is used to drive two push blocks (13) to slide along the guide component, and the linkage component is in transmission cooperation with the slider (7).

7. A constant temperature test chamber according to claim 6, characterized in that: The guide assembly includes two arc-shaped grooves (16) and one annular groove (25). The two arc-shaped grooves (16) are both opened on the bottom inner wall of the box (1) along the circumference of the disc (24). The arc openings of the two arc-shaped grooves (16) are opposite each other, and a movable block (15) is slidably installed in each arc-shaped groove (16). The two arc-shaped grooves (16) correspond one-to-one with two push blocks (13), and each push block (13) is fixedly connected to the movable block (15) in the corresponding arc-shaped groove (16). The annular groove (25) is opened on the disc (24) along the circumference of the disc (24), and each second hinge seat (23) is slidably engaged with the annular groove (25).

8. A constant temperature test chamber according to claim 6, characterized in that: The linkage assembly includes a transmission plate (9) and two gears (10); the two gears (10) are rotatably mounted on the bottom inner wall of the housing (1), and a connecting block (11) is fixedly provided on each gear (10); a connecting groove is opened in each connecting block (11) along the radial direction of the gear (10); two push blocks (13) correspond one-to-one with the two connecting blocks (11), and each push block (13) is inserted into the connecting groove of the corresponding connecting block (11) and slides in a limiting fit with the connecting groove; the transmission plate (9) is located between the two gears (10) and is fixedly connected to the slider (7); two racks are fixedly provided on the transmission plate (9), and the two gears (10) correspond one-to-one with the two racks, and each gear (10) meshes with the corresponding rack.

9. A constant temperature test chamber according to claim 1, characterized in that: The box body (1) has an opening along the sliding direction of the placement plate (12), and a box door (2) is installed at the opening; an observation port is provided on the box door (2), and an observation window (3) is fixedly installed at the observation port.

10. A constant temperature test chamber according to claim 4, characterized in that: An industrial control box (4) is fixedly installed on the housing (1), and a controller is installed inside the industrial control box (4); the motor (5), the electric push rod (26) and all digital heaters (20) are electrically connected to the controller.

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