A rapid temperature change test chamber

Abstract

The application relates to a rapid temperature change test box, which comprises a box body, a first placing rack, a first control member, a first sealing member and a main driving source. A hot chamber and a cold chamber are arranged in the box body, and a sealing partition plate is arranged between the hot chamber and the cold chamber. The first placing rack is arranged in the hot chamber, and a first channel for connecting the cold chamber and the hot chamber is arranged in the sealing partition plate. The first control member is connected with the first placing rack, the main driving source is connected with the first control member and controls the first placing rack to slide in the vertical direction. The first sealing member is arranged on the sealing partition plate and is used for controlling the connection state of the first channel. When the first placing rack passes through the first channel, the first sealing member controls the first channel to connect the hot chamber and the cold chamber. The main driving source and the first control member can drive the first placing rack to realize the effect of replacing the chambers between the hot chamber and the cold chamber in the box body, so that the product does not need to contact the environment outside the test box when replacing the chamber, and the test precision of the test box is improved.

Description

Technical Field

[0001] This application relates to the field of temperature change testing technology, and in particular to a rapid temperature change test chamber. Background Technology

[0002] The performance testing of some electronic components and other products requires the use of rapid temperature change test chambers. These chambers enable rapid switching between high and low temperatures, allowing for the observation of product parameters and performance after exposure to shock changes in high and low temperature environments. They are suitable for schools, factories, military units, research institutes, and other similar institutions.

[0003] Current rapid temperature change test chambers include relatively independent hot and cold chambers, each with its own independent door. When a product needs to be moved between the two chambers, the test personnel need to quickly remove the product from one chamber and place it in the other. The doors of the two chambers need to be opened and closed sequentially when removing and placing the product.

[0004] During the process of changing the product chamber, the product will come into contact with the environment outside the test chamber, causing the product's own temperature to change with the temperature of the external environment of the test chamber, thereby affecting the test parameters and reducing the testing accuracy of the rapid temperature change test chamber. Summary of the Invention

[0005] In order to shorten the time that the product is in the external environment of the test chamber when changing chambers and to improve the test accuracy of the test chamber, this application provides a rapid temperature change test chamber.

[0006] The rapid temperature change test chamber provided in this application adopts the following technical solution:

[0007] A rapid temperature change test chamber includes a chamber body, a first placement rack, a first control component, a first sealing component, and a main drive source;

[0008] The box contains a hot chamber and a cold chamber arranged from top to bottom, and a sealing partition for isolating temperature is provided between the hot chamber and the cold chamber inside the box.

[0009] The first placement rack is located in the hot chamber, and the sealing partition has a first channel connecting the cold chamber and the hot chamber. The first placement rack slides into or out of the cold chamber through the first channel.

[0010] The first control component is installed inside the housing and connected to the first placement rack. The main drive source is connected to the first control component and controls the first placement rack to slide in the vertical direction through the first control component.

[0011] The first seal is installed on the sealing partition and is used to control the communication state of the first channel. When the first placement rack passes through the first channel, the first channel connects the hot chamber and the cold chamber. When the first placement rack does not pass through the first channel, the first seal seals the first channel.

[0012] By adopting the above technical solution, the product is placed on the first placement rack. When the product in the hot chamber needs to be transferred to the cold chamber, the main drive source drives the first placement rack to move vertically downward through the first control component. The first sealing component controls the first channel to be in a connected state, so that the first placement rack can quickly slide into the cold chamber. The product on the first placement rack does not need to come into contact with the external environment of the test chamber, thereby avoiding the risk of temperature changes between the product and the external environment of the test chamber. At the same time, the product moves directly from the hot chamber to the cold chamber without the need for personnel to handle the product or open and close the chamber door, shortening the time spent on product relocation, thereby improving the overall test accuracy of the product. Meanwhile, when the first placement rack is completely in the cold chamber, the first sealing component seals the first channel to isolate the temperature flow and temperature change range between the hot chamber and the cold chamber, so as to ensure a stable ambient temperature in the test chamber as much as possible, thereby further improving the test accuracy of the test chamber.

[0013] Optionally, the first control element includes a first pulley block, a first rope, and a first connector;

[0014] The first pulley assembly is installed inside the housing and connected to the main drive source. The first rope is wound around the first pulley assembly and connected to the first connector. The first pulley assembly drives the first connector to move vertically through the first rope. The first connector is connected to the first placement frame.

[0015] By adopting the above technical solution, the main drive source provides power for the movement of the first placement frame, the first pulley group and the first rope provide guidance for the movement of the first placement frame, and the first connector connects the first rope and the first placement frame to drive the first placement frame to slide vertically.

[0016] Optionally, the first pulley assembly includes a first pulley, a second pulley, a third pulley, a fourth pulley, a fifth pulley, and a sixth pulley that are rotatably installed in one side cavity of the housing;

[0017] The first and second pulleys are arranged horizontally and spaced apart, located at the top of the housing. The third and fourth pulleys are arranged horizontally and spaced apart, both located below the first pulley and above the hot chamber. The fifth and sixth pulleys are arranged horizontally and spaced apart, both located at the bottom of the housing. In the horizontal direction, the third pulley is located between the first and second pulleys, closer to the first pulley; the fourth pulley is located between the first and second pulleys, closer to the second pulley; the fifth pulley is located between the first and third pulleys; and the sixth pulley is located between the fourth and second pulleys. The main drive source is connected to the first pulley.

[0018] By adopting the above technical solution, the first and second pulleys are located at the top of the box to limit the upward sliding distance of the first placement frame, the fifth and sixth pulleys are located at the bottom of the box to limit the downward sliding distance of the first placement frame, the third and fourth pulleys change the winding direction of the first rope, the main drive source drives the first sliding rotation, the first pulley drives the first rope to move on the first pulley group, and the first pulley group guides the movement direction of the first rope.

[0019] Optionally, the first rope is wound around the first pulley group and arranged in an inverted U-shape. The rope segment between the first pulley and the fifth pulley is the first rope segment, the rope segment between the third pulley and the fifth pulley is the second rope segment, the rope segment between the fourth pulley and the sixth pulley is the third rope segment, and the rope segment between the second pulley and the sixth pulley is the fourth rope segment. The first connector connects the first rope segment and the third rope segment.

[0020] By adopting the above technical solution, the first rope is arranged in an inverted U-shape, forming four vertically arranged rope segments between the first pulleys. When the first pulley rotates in the forward direction, the first rope segment and the third rope segment move in the same direction and move downwards simultaneously, as do the second rope segment and the fourth rope segment. The first rope segment and the third rope segment are connected by a first connector, thereby strengthening the connection strength and stability between the first connector and the first rope, allowing the first connector to slide vertically through the first rope segment and the third rope segment.

[0021] Optionally, the first placement rack includes a connecting frame connected to the first connector and a placement slide for placing products;

[0022] The connecting frame is provided with a connecting slide bar that connects to the first connecting member. The hot chamber and the cold chamber are both provided with guide grooves on the cavity walls facing the first connecting member for the connecting slide bar to slide vertically.

[0023] The connecting frame is provided with an installation groove that is horizontally slidably connected to the placement slide. Multiple mesh trays for placing products are installed at intervals along the vertical direction on the placement slide.

[0024] By adopting the above technical solution, the sliding direction of the connecting slide is guided by the guide groove, and the connecting slide is located inside the box. When products need to be placed in the box in batches, the placement slide is slid away from the connecting slide, the products are placed in the mesh tray, and then the placement slide is slid into the connecting slide, so as to facilitate product loading and unloading.

[0025] Optionally, the first seal includes a first sealing door, a first spring, and a first pusher.

[0026] The sealing partition is provided with a sealing groove that is slidably connected to the first sealing door. The sealing groove is connected to one of the horizontal side walls of the first channel and allows the first sealing door to slide into or out of the first channel.

[0027] The first spring is located on the side of the first sealing door away from the first channel, and the two ends of the first spring are respectively connected to the first sealing door and the groove wall of the sealing slide.

[0028] The first pusher is mounted on the top and bottom of the first placement rack and is used to push the first sealing door open as the first placement rack slides into the first channel.

[0029] By adopting the above technical solution, during high-temperature or low-temperature testing of the product, the first sealing door closes to the first channel to isolate airflow between the hot and cold chambers. When the first placement frame slides downward, the first pushing member pushes the first sealing door open, the first spring contracts, and the first channel is connected, allowing the first placement frame to slide into the cold chamber. After the first placement frame is fully inside the cold chamber, the first spring extends and pushes the first sealing door to close again in the first channel, thereby reducing the temperature change within the hot and cold chambers caused by the movement of the first placement frame. This improves the environmental temperature stability within the hot and cold chambers, closely matches the environmental requirements of the product, and thus enhances testing accuracy.

[0030] Optionally, the first pushing member includes a lower push rod installed at the bottom of the first placement frame and an upper push rod installed at the top of the first placement frame. The top surface of the first sealing door is a first pushing slope that gradually slopes upwards from bottom to top along the direction close to the first spring. The top surface of the first sealing door abuts against the lower push rod, and the bottom surface of the first sealing door is located on a second pushing slope that is symmetrically arranged with respect to the first pushing slope.

[0031] By adopting the above technical solution, when the first placement frame slides into the cold chamber, the lower push rod slides against the first pushing inclined surface, and as the lower push rod moves downward, it pushes the first sealing door into the sealing groove. When the first placement frame slides into the hot chamber, the upper push rod slides against the second pushing inclined surface, and as the upper push rod moves upward, it pushes the first sealing door into the sealing groove.

[0032] Optionally, the box is provided with a second placement rack with the same structure as the first placement rack, a second control component with the same structure as the first control component, and a second sealing component with the same structure as the first sealing component;

[0033] The second placement rack is located in the cold chamber. The sealing partition has a second channel connecting the cold chamber and the hot chamber. The second sealing element is installed on the sealing partition and is used to control the connection state of the second channel. The second placement rack is connected to the second control element. The second control element is connected to the main drive source and is used to drive the second placement rack to slide into the hot chamber synchronously when the first placement rack slides into the cold chamber.

[0034] By adopting the above technical solution, when the first placement rack moves from the hot chamber into the cold chamber, the second placement rack located in the cold chamber can move synchronously to the hot chamber, enabling the testing of two products to be carried out simultaneously inside the chamber. This speeds up the testing efficiency of the test chamber, improves the space utilization rate inside the chamber, and saves testing costs.

[0035] Optionally, the second control element is arranged horizontally opposite to the first control element, and both the cold chamber and the hot chamber are located between the first control element and the second control element.

[0036] By adopting the above technical solution, the first control component and the second control component are arranged relative to each other, so that the first placement rack and the second placement rack are located between the first control component and the second control component, making reasonable use of the space occupied by the hot chamber and the cold chamber, and facilitating the picking and placing of products on the first placement rack and the second placement rack.

[0037] Optionally, the second control component further includes a second pulley block, a second rope, and a second connector. The main drive source is connected to the second pulley block, the second rope is wound around the second pulley block, the second connector connects the second rope segment and the fourth rope segment, and the second placement frame is connected to the second connector.

[0038] By adopting the above technical solution, the movement trajectory of the second connector installed on the second and fourth rope segments is opposite to that of the first connector installed on the first and third rope segments, thereby achieving the effect of the second placement frame moving upward when the first placement frame moves downward.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] 1. The main drive source drives the first placement frame to move vertically downward through the first control component, and the first sealing component controls the first channel to be in a connected state, thereby realizing the effect of transferring the product located in the hot chamber to the cold chamber. When the product changes chambers, it does not need to come into contact with the external environment of the test chamber, thus improving the test accuracy of the test chamber.

[0041] 2. The main drive source provides power for the movement of the first placement frame, guides the movement of the first placement frame through the first pulley group and the first rope, and connects the first rope and the first placement frame through the first connector to drive the first placement frame to slide vertically;

[0042] 3. When the first placement rack slides downward, it pushes the first sealing door through the first pusher, thus connecting the first channel. After the first placement rack is fully inserted into the cold chamber, the first spring extends and pushes the first sealing door to close the first channel again, thereby improving the environmental temperature stability of the hot and cold chambers. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of a rapid temperature change test chamber according to this application.

[0044] Figure 2 This is a schematic diagram of the internal structure of the box in an embodiment of this application.

[0045] Figure 3 This is a schematic diagram showing the connection of the first control element, the second control element, and the main drive source in an embodiment of this application.

[0046] Figure 4 This is a schematic diagram showing the connection between the first placement rack and the first control component in an embodiment of this application.

[0047] Figure 5 This is a schematic diagram of the connection between the second placement frame and the second connecting member in an embodiment of this application.

[0048] In the diagram: 1. Box body; 11. Hot chamber; 12. Cold chamber; 13. Guide slide; 2. Sealing partition; 21. First channel; 22. Second channel; 23. Sealing slide; 3. First placement frame; 31. Connecting frame; 311. Mounting slide; 32. Placement slide; 33. Connecting slide bar; 34. Mesh trough frame; 4. First control component; 41. First pulley group; 411. First pulley; 412. Second pulley; 413. Third pulley; 414. Fourth pulley; 415. Fifth pulley; 416. Sixth pulley; 2. First rope; 421. First rope segment; 422. Second rope segment; 423. Third rope segment; 424. Fourth rope segment; 43. First connector; 5. First seal; 51. First sealing door; 511. First pushing ramp; 512. Second pushing ramp; 52. First spring; 53. First pushing component; 531. Lower push rod; 532. Upper push rod; 6. Main drive source; 7. Second placement frame; 8. Second control component; 81. Second pulley block; 82. Second rope; 83. Second connector; 9. Second seal. Detailed Implementation

[0049] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0050] This application discloses a rapid temperature change test chamber. (Refer to...) Figure 1 and Figure 2 The test chamber includes a chamber body 1, a first placement rack 3, a first control component 4, a first sealing component 5, and a main drive source 6.

[0051] The enclosure 1 has a door on one side. A hot chamber 11 and a cold chamber 12 are sequentially formed from top to bottom opposite the door. A sealing partition 2 is horizontally installed between the hot and cold chambers 11 and 12 inside the enclosure 1. The first placement rack 3 is initially located within the hot chamber 11. A first control element 4 is installed inside the enclosure 1 on the same side as the hot and cold chambers 12. The first control element 4 is connected to the first placement rack 3 and guides it to slide vertically. A main drive source 6 is connected to the first control element 4 and provides power for the vertical movement of the first placement rack 3. A first channel 21 connecting the hot and cold chambers 11 is vertically formed on the sealing partition 2. A first sealing element 5 is installed on the sealing partition 2 and controls the connection state of the first channel 21. Initially, the first channel 21 is sealed. When the first placement rack 3 slides vertically downwards into the cold chamber 12, the first channel 21 becomes open.

[0052] When the product undergoes high and low temperature testing, it is first placed on the first placement rack 3, placing it in a high-temperature environment. Then, the main drive source 6, via the first control component 4, drives the first placement rack 3 to slide vertically downwards. The first sealing component 5 controls the first channel 21 to be in a connected state. The first placement rack 3 moves downwards through the first channel 21 until it is completely within the cold chamber 12, at which point the first sealing component 5 controls the first channel 21 to be sealed. During chamber replacement, not only is it unnecessary for testing personnel to open and close the chamber door to handle the product, shortening the time spent in the external environment during chamber replacement, but it also enhances the protection of testing personnel and shortens the chamber replacement time, resulting in more accurate test results. The first sealing component 5 seals the first channel 21 to isolate temperature flow and temperature fluctuations between the hot chamber 11 and the cold chamber 12, ensuring a stable ambient temperature within the test chamber. Thus, the combined action of the first control component 4 and the first sealing component 5 improves the overall testing accuracy of the test chamber.

[0053] When the product is in the hot chamber 11, no test is conducted in the cold chamber 12. Therefore, in order to enhance the utilization of the space in the test chamber and speed up the working efficiency of the hot chamber 11 and the cold chamber 12, as shown in the figure, a second placement rack 7 with the same structure as the first placement rack 3 is also installed in the chamber 1. The second placement rack 7 is initially located in the cold chamber 12.

[0054] The housing 1 contains a second control element 8 with the same structure as the first control element 4. The second control element 8 is connected to the second placement rack 7 to guide the vertical movement of the second placement rack 7. The main drive source 6 is connected to the second control element 8. For easy product placement and removal, both the first placement rack 3 and the second placement rack 7 are directly opposite the housing door. The second control element 8 is arranged horizontally opposite to the first control element 4. The cold chamber 12 and the hot chamber 11 are located between the first control element 4 and the second control element 8, so that the first control element 4 and the second control element 8 are located on the horizontal sides of the housing door. The sealing partition 2 has a second channel 22 for the second placement rack 7 to slide into the hot chamber 11. The sealing partition 2 has a second sealing element 9 with the same structure as the first sealing element 5 at the second channel 22.

[0055] When the main drive source 6 drives the first placement rack 3 to slide down into the cold chamber 12, the main drive source 6 drives the second placement rack 7 to slide up into the hot chamber 11, so that two products can be tested simultaneously in the chamber 1, which speeds up the testing efficiency of the test chamber, improves the space utilization rate of the chamber 1, and saves test costs.

[0056] Reference Figure 2 and Figure 3 The first control component 4 includes a first pulley block 41, a first rope 42, and a first connector 43.

[0057] Among them, such as Figure 3 and Figure 4 As shown, the first pulley group 41 includes a first pulley 411, a second pulley 412, a third pulley 413, a fourth pulley 414, a fifth pulley 415, and a sixth pulley 416 rotatably installed inside the housing 1.

[0058] The first pulley 411 and the second pulley 412 are arranged horizontally and spaced apart, located at the top of the housing 1. The third pulley 413 and the fourth pulley 414 are arranged horizontally and spaced apart, both located below the first pulley 411 and above the hot chamber 11. The fifth pulley 415 and the sixth pulley 416 are arranged horizontally and spaced apart, both located at the bottom of the housing 1. In the horizontal direction, the third pulley 413 is located between the first pulley 411 and the second pulley 412, closer to the first pulley 411; the fourth pulley 414 is located between the first pulley 411 and the second pulley 412, closer to the second pulley 412; the fifth pulley 415 is located between the first pulley 411 and the third pulley 413; and the sixth pulley 416 is located between the fourth pulley 414 and the second pulley 412. The main drive source 6 is connected to the first pulley 411.

[0059] The first rope 42 is wound around the first pulley group 411 and connected to the first connector 43. When the main drive source 6 drives the first pulley 411 to rotate, the first rope 42 moves on the first pulley group 41. The first pulley group 41 guides the winding direction of the first rope 42 and provides power for the movement of the first rope 42, so that the first rope 42 is arranged in an inverted U-shape on the first pulley group 41.

[0060] like Figure 4 As shown, the first rope 42 is wound around the first pulley group 41 to form four vertically arranged rope segments. The rope segment between the first pulley 411 and the fifth pulley 415 is the first rope segment 421; the rope segment between the third pulley 413 and the fifth pulley 415 is the second rope segment 422; the rope segment between the fourth pulley 414 and the sixth pulley 416 is the third rope segment 423; and the rope segment between the second pulley 412 and the sixth pulley 416 is the fourth rope segment 424. When the first pulley 411 rotates, the first rope segment 421 and the third rope segment 423 move in the same direction, and the second rope segment 422 and the fourth rope segment 424 move in the same direction. The first connecting member 43 connects the first rope segment 421 and the third rope segment 423, thereby enabling the first connecting member 43 to move vertically.

[0061] Furthermore, the first placement rack 3 includes a connecting frame 31 connected to the first connector 43 and a placement slide 32 for placing products. The connecting frame 31 is provided with a connecting slide bar 33 connected to the first connector 43. Guide grooves 13 for vertical sliding of the connecting slide bar 33 are provided on the walls of the hot chamber 11 and the cold chamber 12 facing the first connector 43. The connecting frame 31 is provided with an installation groove 311 that slides horizontally with the placement slide 32. Multiple mesh trays 34 for placing products are installed at intervals along the vertical direction on the placement slide 32.

[0062] Since the guide groove 13 connects the hot chamber 11 and the cold chamber 12, therefore, as Figure 2 As shown. The top end of the connecting slide bar 33 is flush with the upper push rod 532, and the bottom end of the connecting slide bar 33 is flush with the lower push rod 531, thereby achieving the effect of sealing between the hot chamber 11 and the cold chamber 12.

[0063] When products are placed in the chamber 1 in batches, the placement slide 32 can be slid away from the connecting frame 31 to remove the products from the chamber 1. The test personnel can place the products outside the chamber 1 and then slide the placement slide 32 into the connecting frame 31. This facilitates the operation of the test personnel and reduces the damage to the test personnel caused by the high temperature inside the hot chamber 11.

[0064] Since the second control element 8 has the same structure as the first control element 4, such as Figure 2 and Figure 5 As shown, the second control component 8 includes a second pulley block 81, a second rope 82, and a second connector 83. The second placement frame 7 is connected to the second connector 83. The main drive source 6 is connected to the first pulley 411 in the second pulley block 81. The second rope 82 is wound around the second pulley block 412. The second connector 83 connects the second rope segment 422 and the fourth rope segment 424 in the second rope 82. When the main drive source 6 drives the first pulley 411 in the first pulley block 41 and the second pulley 412 in the second pulley block 81 to rotate synchronously in the forward direction, the first placement frame 3 moves downward and the second placement frame 7 moves upward.

[0065] Reference Figure 2 and Figure 3 The first sealing element 5 includes a first sealing door 51, a first spring 52, and a first pushing element 53.

[0066] A sealing groove 23 is provided inside the sealing partition 2, which is slidably connected to the first sealing door 51. The sealing groove 23 communicates with one of the horizontal side walls of the first channel 21, allowing the first sealing door 51 to slide into or out of the first channel 21. A first spring 52 is located on the side of the first sealing door 51 away from the first channel 21, and its two ends are respectively connected to the first sealing door 51 and the groove wall of the sealing groove 23. When the first sealing door 51 is closed at the first channel 21, the first spring 52 is in an extended state; when the first sealing door 51 slides into the sealing groove 23, the first spring 52 is in a contracted state.

[0067] The first pushing member 53 includes a lower pushing rod 531 installed at the bottom of the first placement frame 3 and an upper pushing rod 532 installed at the top of the first placement frame 3. The top surface of the first sealing door 51 is a first pushing slope 511 that gradually slopes upwards from bottom to top along the direction close to the first spring 52, and the top surface of the first sealing door 51 abuts against the lower pushing rod 531. The bottom surface of the first sealing door 51 is located on a second pushing slope 512 symmetrically arranged on the first pushing slope 511.

[0068] When the first placement rack 3 slides into the cold chamber 12, the lower push rod 531 slides against the first pushing ramp 511. As the lower push rod 531 moves downward, it pushes the first sealing door 51 into the sealing groove 23. When the first placement rack 3 slides into the hot chamber 11 again, the upper push rod 532 slides against the second pushing ramp 512. As the upper push rod 532 moves upward, it pushes the first sealing door 51 into the sealing groove 23. When the first placement rack 3 is completely located in the hot chamber 11 and the cold chamber 12, the first sealing door 51 can promptly close the first channel 21, thereby improving the temperature stability of the environment in the hot chamber 11 and the cold chamber 12, conforming as closely as possible to the environmental requirements of the product, and improving the testing accuracy of the test chamber.

[0069] The implementation principle of a rapid temperature change test chamber according to an embodiment of this application is as follows: When the product is being tested, the placement slide 32 is first removed from the chamber body 1, and then the product is placed on the mesh groove frame 34 of the placement slide 32. Then, the placement slide 32 is slid into the connecting frame 31, and the chamber door is closed for testing. When the product needs to change chambers, the main drive source 6 is started, and the first control component 4 drives the product on the first placement frame 3 to move downward from the hot chamber 11 to the cold chamber 12. The second control component 8 drives the product on the second placement frame 7 to move upward from the cold chamber 12 to the hot chamber 11. When the first placement frame 3 moves downward, the lower push rod 531 pushes the first sealing door 51 to realize the connection of the first channel 21. When the second placement frame 7 moves upward, the second sealing component 9 controls the connection of the second channel 22. Finally, the chamber can be changed without the product contacting the external environment of the test chamber, thus shortening the time the product is in the external environment of the test chamber when changing chambers and improving the test accuracy of the test chamber.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rapid temperature change test chamber, characterized in that: The enclosure includes a housing (1), a first placement rack (3), a first control component (4), a first sealing component (5), and a main drive source (6). The housing (1) contains a hot chamber (11) and a cold chamber (12) arranged sequentially from top to bottom. A sealing partition (2) for temperature isolation is provided between the hot chamber (11) and the cold chamber (12) within the housing (1). The first placement rack (3) is located within the hot chamber (11), and the sealing partition (2) has a connection between the cold chamber (12) and the hot chamber (11). The first channel (21) of the first placement rack (3) is slid into or out of the cold chamber (12) through the first channel (21); the first control element (4) is installed inside the housing (1) and connected to the first placement rack (3); the main drive source (6) is connected to the first control element (4) and controls the first placement rack (3) to slide vertically through the first control element (4); the first seal (5) is installed on the sealing partition (2) and is used to control the communication state of the first channel (21); when the first placement rack ( 3) When passing through the first channel (21), the first channel (21) connects the hot chamber (11) and the cold chamber (12). When the first placement rack (3) does not pass through the first channel (21), the first seal (5) seals the first channel (21). The first control element (4) includes a first pulley assembly (41), a first rope (42), and a first connector (43). The first pulley assembly (41) is installed inside the housing (1) and connected to the main drive source (6). The first rope (42) is wound around the first pulley assembly. The first pulley assembly (41) is connected to the first connecting member (43) via the first rope (42), and the first connecting member (43) is connected to the first placement frame (3). The first pulley assembly (41) includes a first pulley (411), a second pulley (412), a third pulley (413), a fourth pulley (414), a fifth pulley (415), and a sixth pulley (416) which are rotatably installed in one side cavity of the box (1).The first pulley (411) and the second pulley (412) are horizontally spaced apart and located at the top of the housing (1). The third pulley (413) and the fourth pulley (414) are horizontally spaced apart and located below the first pulley (411) and above the hot chamber (11). The fifth pulley (415) and the sixth pulley (416) are horizontally spaced apart and located at the bottom of the housing (1). In the horizontal direction, the third pulley (413) is located between the first pulley (411) and the second pulley (412) and closer to the first pulley (411). The fourth pulley (414) is located between the first pulley (411) and the second pulley (412). The second pulley (412) is located between the second pulley (412) and the side closest to the second pulley (412); the fifth pulley (415) is located between the first pulley (411) and the third pulley (413); and the sixth pulley (416) is located between the fourth pulley (414) and the second pulley (412). The main drive source (6) is connected to the first pulley (411). The first placement rack (3) includes a connecting frame (31) connected to the first connector (43) and a placement slide (32) for placing products. The connecting frame (31) is provided with a connecting slide bar (33) connected to the first connector (43). The hot chamber (11) The cold chamber (12) and the cavity wall opposite the first connector (43) are provided with guide grooves (13) for vertical sliding of the connecting slide (33); the first sealing member (5) includes a first sealing door (51), a first spring (52) and a first pusher (53); the sealing partition (2) is provided with a sealing groove (23) that is slidably connected to the first sealing door (51), the sealing groove (23) is connected to one of the horizontal side walls of the first channel (21) and allows the first sealing door (51) to slide into or out of the first channel (21); the first spring (52) is located on the first sealing door (51) away from the first channel (21). On one side of the first spring (52), the two ends of the first spring (52) are respectively connected to the first sealing door (51) and the groove wall of the sealing slide (23); the first pusher (53) is installed at the top and bottom of the first placement frame (3) and is used to push the first sealing door (51) open when the first placement frame (3) slides into the first channel (21); the first pusher (53) includes a lower push rod (531) installed at the bottom of the first placement frame (3) and an upper push rod (532) installed at the top of the first placement frame (3); the top of the connecting slide (33) is flush with the upper push rod (532), and the bottom of the connecting slide (33) is flush with the lower push rod (531).

2. The rapid temperature change test chamber according to claim 1, characterized in that: The first rope (42) is wound around the first pulley group (41) and arranged in an inverted U-shape. The rope segment between the first pulley (411) and the fifth pulley (415) is the first rope segment (421), the rope end between the third pulley (413) and the fifth pulley (415) is the second rope segment (422), the rope end between the fourth pulley (414) and the sixth pulley (416) is the third rope segment (423), and the rope end between the second pulley (412) and the sixth pulley (416) is the fourth rope segment (424). The first connector (43) connects the first rope segment (421) and the third rope segment.

3. The rapid temperature change test chamber according to claim 1, characterized in that: The connecting frame (31) is provided with an installation groove (311) that is horizontally slidably connected to the placement slide (32), and multiple mesh trays (34) for placing products are installed at intervals along the vertical direction on the placement slide (32).

4. A rapid temperature change test chamber according to claim 1, characterized in that: The top surface of the first sealing door (51) is a first pushing slope (511) that gradually slopes upward from bottom to top along the direction close to the first spring (52). The top surface of the first sealing door (51) abuts against the lower push rod (531). The bottom surface of the first sealing door (51) is located on a second pushing slope (512) symmetrically arranged on the first pushing slope (511).

5. A rapid temperature change test chamber according to claim 2, characterized in that: The box (1) is provided with a second placement rack (7) with the same structure as the first placement rack (3), a second control component (8) with the same structure as the first control component (4), and a second sealing component (9) with the same structure as the first sealing component (5); The second placement rack (7) is located inside the cold chamber (12). The sealing partition (2) has a second channel (22) connecting the cold chamber (12) and the hot chamber (11). The second sealing element (9) is installed on the sealing partition (2) and is used to control the connection state of the second channel (22). The second placement rack (7) is connected to the second control element (8). The second control element (8) is connected to the main drive source (6) and is used to drive the second placement rack (7) to slide into the hot chamber (11) synchronously when the first placement rack (3) slides into the cold chamber (12).

6. A rapid temperature change test chamber according to claim 5, characterized in that: The second control element (8) is arranged horizontally opposite to the first control element (4), and the cold chamber (12) and the hot chamber (11) are both located between the first control element (4) and the second control element (8).

7. A rapid temperature change test chamber according to claim 5, characterized in that: The second control unit (8) also includes a second pulley block (81), a second rope (82), and a second connector (83). The main drive source (6) is connected to the second pulley block (81). The second rope (82) is wound around the second pulley block (81). The second connector (83) connects the second rope segment (422) and the fourth rope segment (424) of the second rope (82). The second placement frame (7) is connected to the second connector (83).

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