A temperature shock test chamber for electrical and electronic products

Abstract

This invention discloses a temperature shock test chamber for electrical and electronic products, relating to the technical field of temperature shock testing equipment. Addressing the problem of poor isolation between the high and low temperature chambers in existing temperature shock test chambers, the following solution is proposed: a test chamber body with an experimental cavity on its inner wall, the inner wall of which has two air ducts; a basket located inside the experimental cavity, with two symmetrical sealing plates fixedly connected to its exterior; and an isolation frame located inside the experimental cavity, with a crossbeam on its exterior. This invention ensures effective isolation between the high and low temperature chambers during use, significantly reducing cross-current during basket switching between the two chambers, lowering the energy consumption of the temperature control system, improving temperature control accuracy, and enhancing the precision of test results.

Description

Technical Field

[0001] This invention relates to the field of temperature shock testing equipment, and more particularly to a temperature shock testing chamber for electrical and electronic products. Background Technology

[0002] Temperature shock test chambers are important equipment used to assess the adaptability of electrical and electronic products to rapid changes in ambient temperature. The typical structure is a two-chamber or three-chamber type. In the two-chamber structure, the high chamber and the low chamber are arranged independently, either vertically or horizontally. The sample to be tested is carried by a reciprocating basket, and the high and low chambers can be quickly switched to achieve temperature shock.

[0003] When the baskets on the two test chambers switch between the high and low chambers, the existing test chambers have poor isolation measures for the low chamber. A large amount of humid air from the high-temperature side will enter the low chamber, quickly frosting and freezing on the evaporator surface. This causes a sharp drop in cooling efficiency and a temperature rise, forcing the equipment to frequently stop for defrosting, making it impossible to complete long-term continuous tests. At the same time, the escape of low-temperature dry air into the high chamber will also cause additional energy consumption of the heating system and deterioration of temperature control accuracy. Summary of the Invention

[0004] This invention discloses a temperature shock test chamber for electrical and electronic products, aiming to solve the technical problem that the isolation measures between the high and low chambers of existing temperature shock test chambers are ineffective.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A temperature shock test chamber for electrical and electronic products, comprising: The test chamber body has an experimental chamber, and the inner wall of the experimental chamber is provided with two air ducts; The basket is located inside the experimental chamber, and two symmetrical closed plates are fixedly connected to the outside of the basket. An isolation frame is located inside the experimental chamber, and a crossbeam is provided on the outside of the isolation frame. The outside of the crossbeam is fixedly connected to the inner wall of the experimental chamber. A composite closed module is located inside the experimental chamber. The composite closed module includes an annular airbag, which is disposed on the inner wall of the isolation frame. An equalizing box is disposed inside the experimental chamber, and a balance box is disposed on the crossbeam. Two air guide modules are located outside the two air ducts, and each air guide module includes a directional plate.

[0006] In a preferred embodiment, it also includes: The two cabinet doors are symmetrical to each other, and the exterior of both doors is connected to the exterior of the test chamber body via hinges.

[0007] The composite enclosed module further includes: The exhaust pipe has a circular opening on both the experimental chamber and the isolation frame. The exhaust pipe is located inside the circular opening. One end of the exhaust pipe is fixedly connected to the outside of the annular airbag. The exhaust pipe communicates with the annular airbag. A control valve is installed on the outside of the exhaust pipe. An inflation tube is provided; both the experimental chamber and the isolation frame have openings, and the inflation tube is located inside the openings. One end of the inflation tube is connected to the annular airbag. Two reserved slots are respectively set on two closed plates. The outer side of each closed plate is provided with an arc-shaped groove. The outer side of the annular airbag is fitted with the inner wall of the arc-shaped groove on the same side. An annular pipe network is provided in both reserved slots.

[0008] The composite enclosed module further includes: Multiple fine holes are set on the inner walls of two arc-shaped grooves. Multiple nozzles are symmetrically distributed at equal intervals around the outside of the two annular pipe networks. The nozzles are all located in the fine holes on the same side. Two lip-shaped sealing rings are respectively disposed on the inner walls of two arc-shaped grooves, and the outer side of the lip-shaped sealing rings is in contact with the outer side of the annular airbag. Two contact rods are respectively set in two reserved slots. The inner wall of each reserved slot is provided with a hole. The inner wall of the hole is slidably connected to the outside of the contact rod. One end of the contact rod contacts the outside of the annular airbag, and the other end is fixedly connected to a compressed airbag. The outside of each contact rod is slidably connected to a fixed sleeve. The outside of the fixed sleeve is fixedly connected to the inner wall of the reserved slot. The compressed airbag is located inside the fixed sleeve.

[0009] The composite enclosed module further includes: Multiple return springs are respectively disposed on the outside of two fixed sleeves. Two symmetrical cuts are opened on each of the two fixed sleeves. A movable plate is slidably connected in each cut. The movable plate is fixedly connected to the side opposite to the outside of the contact rod. One end of each return spring is fixedly connected to the outside of the movable plate on the same side, and the other end is fixedly connected to the outside of the fixed sleeve on the same side. Two hoses are provided on the side of the compressed air bladder away from the contact rod, and a one-way valve is provided on the outside of each hose; Two check valves are installed on the two compression bladders respectively; Two silicone oil tanks are located in two reserved slots. Each reserved slot has a notch, and an inspection door is fixedly connected to the inner wall of each notch. The ends of two hoses away from the compressed air bag are fixedly connected to the outside of the two silicone oil tanks. An oil guide pipe is provided outside each of the two inspection doors, and the other end of each oil guide pipe is fixedly connected to the annular pipe network on the same side.

[0010] The composite enclosed module further includes: A diversion plate is located above the isolation frame and between the equalizing box and the balancing box. A rectangular plate is disposed inside a pressure equalization box, and the rectangular plate is provided with multiple vent holes; Two constraint plates, which are symmetrical to each other, are fixedly connected to the inner wall of the equalizing box on the outside. The experimental chamber has a narrow opening on its inner wall, and the reflux pipe is located inside the narrow opening. One end of the reflux pipe is located inside the balance box, and the other end is located outside the test chamber body. A suction pump is fixedly connected to the outside of the test chamber body, and the output end of the suction pump is connected to the reflux pipe through a round pipe.

[0011] The composite enclosed module further includes: A gas duct is provided, one end of which is fixedly connected to the outside of the equalizing chamber, and the other end is fixedly connected to a filter. A membrane dryer is installed on the gas duct. An air pump is fixedly connected to the outside of the test chamber body. The output end of the air pump is connected to the gas duct through a short pipe. The gas tank is located outside the test chamber body. A delivery pipe is fixedly connected to the outside of the gas tank. A switch valve is installed on the outside of the delivery pipe, and the end of the delivery pipe away from the gas tank is fixedly connected to the end of the inflation pipe. A delivery pump is fixedly connected to the outside of the test chamber body, and the delivery pump is located outside the delivery pipe.

[0012] In a preferred embodiment, the air guiding module further includes: Two grooves are provided, both on the inner wall of the experimental chamber, and the two grooves are located on the outside of the two air ducts respectively; Two hydraulic rods are provided. The top and bottom inner walls of the experimental chamber each have two symmetrical notches. The inner walls of the notches are fixedly connected to the outside of the hydraulic rods. The output ends of the two hydraulic rods on the same side are fixedly connected to the same movable plate.

[0013] The air guide module also includes: Two shafts and two movable plates are fixedly connected to the outside of bosses. The bosses are fixedly connected to the outside of the shafts on the same side. The outside of the two steering plates are movably connected to the outside of the two shafts respectively. Both shafts are surrounded by torsion springs. One end of each torsion spring is fixedly connected to the outside of the shaft on the same side, and the other end is fixedly connected to the outside of the steering plate on the same side.

[0014] The air guide module also includes:

[0015] Two winding rollers are located outside two movable plates. Each winding roller is movably connected to a boss, and each boss is fixedly connected to a motor. The output end of each motor is connected to one side of the winding roller on the same side via a coupling. Two guide rollers are provided, and each guide roller is movably connected to a support frame. The support frame is fixedly connected to the outside of a movable plate on the same side. A steel wire rope is provided on the outside of each guide roller. One end of the steel wire rope is fixedly connected to the outside of a winding roller on the same side, and the other end of the steel wire rope is fixedly connected to the outside of a steering plate on the same side.

[0016] As can be seen from the above, the temperature shock test chamber for electrical and electronic products provided by the present invention can ensure effective isolation between the high and low temperature chambers during use, significantly reducing cross-current caused when the basket switches between the high and low temperature chambers, reducing the energy consumption of the temperature control system, improving the temperature control accuracy, and improving the accuracy of the test results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0018] Figure 2 This is a cross-sectional structural diagram of a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0019] Figure 3 This is a schematic diagram of a composite enclosed module structure for a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0020] Figure 4 This is a schematic diagram of the enclosed plate structure of a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0021] Figure 5 This is a schematic diagram of the ring-shaped pipe network structure of a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0022] Figure 6 This is a schematic diagram of the fixed sleeve structure of a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0023] Figure 7 This is a schematic diagram of the equalizing chamber structure of a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0024] Figure 8 This is a schematic diagram of the air guide module structure of a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0025] Figure 9 This is a schematic diagram of the directional plate structure of a temperature shock test chamber for electrical and electronic products proposed in this invention.

[0026] In the diagram: 1. Test chamber body; 2. Cabinet door; 3. Basket; 4. Enclosure plate; 5. Crossbeam; 6. Isolation frame; 7. Air duct; 8. Composite enclosure module; 801. Exhaust pipe; 802. Control valve; 803. Inflation pipe; 804. Annular airbag; 805. Reserved slot; 806. Fine hole; 807. Silicone oil tank; 808. Inspection door; 809. Annular pipe network; 810. Nozzle; 811. Fixing sleeve; 812. Compressed airbag; 813. Hose; 814. One-way valve; 815. Contact rod; 816. Check valve; 817. Return spring; 818. Equalizing chamber; 819. Rectangular plate; 820. Vent hole; 821. Constraint plate; 822. Drain plate; 823. Balance box; 824. Return pipe; 825. Suction pump; 826. Lip seal; 9. Air guide module; 901. Groove; 902. Movable plate; 903. Hydraulic rod; 904. Directional plate; 905. Torsion spring; 906. Winding roller; 907. Steel wire rope; 908. Electric motor; 909. Guide roller; 910. Shaft; 10. Air tank; 11. Delivery pipe; 12. Delivery pump; 13. Switch valve; 14. Air guide pipe; 15. Membrane dryer; 16. Filter; 17. Suction pump; 18. Experimental chamber. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] The temperature shock test chamber for electrical and electronic products disclosed in this invention is mainly used in scenarios where the isolation measures between the high and low chambers of existing temperature shock test chambers are ineffective.

[0029] Reference Figures 1-9 A temperature shock test chamber for electrical and electronic products, comprising: The test chamber body 1 has an experimental chamber 18, and the inner wall of the experimental chamber 18 is provided with two air ducts 7. Basket 3 is located inside experimental chamber 18. Two symmetrical enclosed plates 4 are bolted to the outside of basket 3. An isolation frame 6 is located inside the experimental chamber 18. A crossbeam 5 is provided on the outside of the isolation frame 6, and the outside of the crossbeam 5 is connected to the inner wall of the experimental chamber 18 by bolts. The composite closed module 8 is located inside the experimental chamber 18. The composite closed module 8 includes an annular airbag 804, which is disposed on the inner wall of the isolation frame 6. An equalizing box 818 is disposed inside the experimental chamber 18, and a balance box 823 is disposed on the crossbeam 5. Two air guide modules 9 are located outside the two air ducts 7 respectively, and each air guide module 9 includes a directional plate 904.

[0030] Specifically, the device utilizes a composite enclosed module 8 to ensure effective isolation between the high and low temperature chambers during use, significantly reducing cross-current caused when the basket 3 switches between the high and low temperature chambers, reducing the energy consumption of the device's temperature control system, improving temperature control accuracy, and enhancing the precision of test results.

[0031] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In a preferred embodiment, it further includes: There are two cabinet doors 2, which are symmetrical to each other. The exterior of both cabinet doors 2 is connected to the exterior of the test chamber body 1 by hinges.

[0032] The composite closed module 8 also includes: The exhaust pipe 801, the experimental chamber 18 and the isolation frame 6 are all provided with round openings. The exhaust pipe 801 is located inside the round opening. One end of the exhaust pipe 801 is connected to the outside of the annular airbag 804 by bolts. The exhaust pipe 801 is connected to the annular airbag 804. A control valve 802 is provided on the outside of the exhaust pipe 801. The inflation tube 803, the experimental chamber 18 and the isolation frame 6 are all provided with openings. The inflation tube 803 is located inside the openings and one end of the inflation tube 803 is connected to the annular airbag 804. Two reserved slots 805 are respectively set on two closed plates 4. The outer side of each closed plate 4 is provided with an arc-shaped groove. The outer side of the annular airbag 804 is in contact with the inner wall of the arc-shaped groove on the same side. An annular pipe network 809 is provided in each of the two reserved slots 805.

[0033] The composite closed module 8 also includes: Multiple fine holes 806 are respectively set on the inner wall of two arc-shaped grooves. Multiple nozzles 810 are symmetrically distributed in a circular pattern on the outside of the two annular pipe networks 809. The nozzles 810 are all located in the fine holes 806 on the same side. Two lip seals 826 are respectively disposed on the inner walls of two arc-shaped grooves, and the outer surface of the lip seals 826 is in contact with the outer surface of the annular airbag 804. Two contact rods 815 are respectively set in two reserved slots 805. The inner walls of the two reserved slots 805 are provided with slot holes. The inner walls of the slot holes are slidably connected to the outside of the contact rods 815. One end of the contact rods 815 contacts the outside of the annular airbag 804, and the other end is connected to the compressed airbag 812 by bolts. The outside of the two contact rods 815 is slidably connected to the fixed sleeves 811. The outside of the fixed sleeves 811 is connected to the inner wall of the reserved slots 805 by bolts. The compressed airbags 812 are located inside the fixed sleeves 811.

[0034] The composite closed module 8 also includes: Multiple return springs 817 are respectively disposed on the outside of two fixed sleeves 811. Two symmetrical cuts are opened on each of the two fixed sleeves 811. A movable plate is slidably connected in each cut. The movable plate is bolted to the opposite side of the outside of the contact rod 815. One end of each return spring 817 is bolted to the outside of the movable plate on the same side, and the other end is bolted to the outside of the fixed sleeve 811 on the same side. Two hoses 813 are located on the side of the compressed air bag 812 away from the contact rod 815, and a one-way valve 814 is provided on the outside of each hose 813. Two check valves 816 are respectively installed on two compressed air bags 812; Two silicone oil tanks 807 are located in two reserved slots 805. Both reserved slots 805 have notches, and the inner walls of the notches are bolted to inspection doors 808. The ends of two hoses 813 away from the compressed air bag 812 are bolted to the outside of the two silicone oil tanks 807. Oil guide pipes are provided on the outside of the two inspection doors 808, and the other ends of the oil guide pipes are bolted to the annular pipe network 809 on the same side.

[0035] The composite closed module 8 also includes: Drainage plate 822 is located above isolation frame 6 and between equalizing box 818 and balance box 823; A rectangular plate 819 is disposed inside a pressure equalization box 818, and a plurality of vent holes 820 are provided on the rectangular plate 819. Two constraint plates 821 are symmetrical to each other, and the outer sides of the constraint plates 821 are connected to the inner wall of the equalizing box 818 by bolts. The inner wall of the experimental chamber 18 has a narrow opening, and the return pipe 824 is located inside the narrow opening. One end of the return pipe 824 is located inside the balance box 823, and the other end is located outside the test chamber body 1. A suction pump 825 is bolted to the outside of the test chamber body 1, and the output end of the suction pump 825 is connected to the return pipe 824 through a round pipe.

[0036] The composite closed module 8 also includes: The air duct 14 has one end connected to the outside of the equalizing chamber 818 by bolts, and the other end is connected to a filter 16 by bolts. A membrane dryer 15 is installed on the air duct 14. An air pump 17 is connected to the outside of the test chamber body 1 by bolts. The output end of the air pump 17 is connected to the air duct 14 through a short pipe. Gas tank 10 is located outside the test chamber body 1. A delivery pipe 11 is bolted to the outside of the gas tank 10. A switch valve 13 is installed on the outside of the delivery pipe 11. The end of the delivery pipe 11 away from the gas tank 10 is bolted to the end of the inflation pipe 803. The external part of the delivery pump 12 is connected to the external part of the test chamber body 1 by bolts, and the delivery pump 12 is located outside the delivery pipe 11.

[0037] In specific application scenarios, the composite sealing module 8 is mainly used in the composite sealing process. Specifically, the composite sealing module 8 forms the first elastic seal by inflating the annular airbag 804 and the lip seal ring 826. It also uses the kinetic energy of the airbag expansion to compress the airbag 812, automatically spraying neutral silicone oil onto the bonding surface to form an oil film sealing layer, thus constituting an adaptive double seal. This significantly improves the sealing reliability, eliminates the problems of high and low temperature gas crosstalk and frost condensation. When the basket 3 moves, the airbag deflates and detaches, and works with the micro-positive pressure drying air curtain formed by rectification and guidance for dynamic isolation, achieving zero wear during movement and contactless protection throughout the process. Synchronous suction avoids air pressure accumulation, significantly extends the seal life, and reduces operating energy consumption and maintenance costs.

[0038] Reference Figure 8 and Figure 9 In a preferred embodiment, the air guide module 9 further includes: Two grooves 901 are provided on the inner wall of the experimental chamber 18, and the two grooves 901 are located on the outside of the two air ducts 7 respectively. Two hydraulic rods 903 are provided. The top and bottom inner walls of the experimental chamber 18 each have two symmetrical notches. The inner walls of the notches are bolted to the outside of the hydraulic rods 903. The output ends of the two hydraulic rods 903 on the same side are bolted to the same movable plate 902.

[0039] The air guide module 9 also includes: Both shafts 910 and both movable plates 902 have bosses bolted to their exteriors. The bosses are bolted to the exteriors of the shafts 910 on the same side. The exteriors of the two steering plates 904 are rotatably connected to the exteriors of the two shafts 910 via bearings. Both shafts 910 are surrounded by torsion springs 905. One end of each torsion spring 905 is bolted to the exterior of the shaft 910 on the same side, and the other end is bolted to the exterior of the steering plate 904 on the same side.

[0040] The air guide module 9 also includes: Two winding rollers 906 are located outside the two movable plates 902 respectively. The outside of each winding roller 906 is rotatably connected to a boss through a bearing. The outside of each boss is connected to a motor 908 through bolts. The output end of each motor 908 is connected to one side of the winding roller 906 on the same side through a coupling. Two guide rollers 909 are rotatably connected to a support frame via bearings. The support frame is bolted to the exterior of the movable plate 902 on the same side. A wire rope 907 is provided on the exterior of each guide roller 909. One end of the wire rope 907 is bolted to the exterior of the winding roller 906 on the same side, and the other end of the wire rope 907 is bolted to the exterior of the steering plate 904 on the same side.

[0041] In specific application scenarios, the air guide module 9 is mainly used in the air guide process. That is, the air guide module 9 enables the device to flexibly adjust the jet direction and coverage area of ​​the airflow according to the size, shape and placement of the electronic product, guide the high-speed airflow to concentrate and sweep the sample surface, significantly enhance convective heat transfer, and shorten the response and recovery time of temperature shock; at the same time, it eliminates the dead air angle in the experimental chamber 18, improves the uniformity of the temperature field, and reduces the test error caused by temperature difference gradient.

[0042] Working principle: During temperature shock testing of electronic products, the isolation frame 6 divides the test chamber 18 into an upper high-temperature chamber and a lower low-temperature chamber. When the hinge on the test chamber body 1 lifts the basket 3 into the upper high-temperature chamber, the delivery pump 12 is started and the switch valve 13 is opened. The delivery pump 12 delivers dry air from the air tank 10 into the annular airbag 804 through the delivery pipe 11 and the inflation pipe 803, causing the annular airbag 804 to gradually expand and gradually fit against the inner wall of the arc-shaped groove on the sealing plate 4. The surface of the annular airbag 804 first contacts the lip seal ring 826, forming the first seal. As the annular airbag 804 continues to expand, the outside of the annular airbag 804 pushes the contact rod. 815 overcomes the elastic force of the return spring 817 to compress the compression airbag 812, causing the airbag 812 to deliver its internal air into the silicone oil tank 807 through the hose 813. Under the action of the air pressure inside the silicone oil tank 807, the neutral silicone oil inside the silicone oil tank 807 is forced into the annular pipe network 809, and sprayed from the nozzle 810 on the annular pipe network 809 onto the mating piece of the annular airbag 804 and the arc-shaped groove on the sealing plate 4, forming a second layer of sealing. When the basket 3 needs to be moved from the high-temperature chamber to the low-temperature chamber at the bottom of the experimental chamber 18, the control valve 802 is opened, causing the exhaust pipe 801 to release the air in the annular airbag 804. The annular airbag 804 deflates and contracts, no longer mating with the arc-shaped groove. When the test chamber body 1 is in contact with the groove, the hinge inside the test chamber 1 drives the basket 3 to descend, allowing the basket 3 to enter the low-temperature chamber. During this process, the air pump 17 is started. The air pump 17 delivers the room temperature air, filtered by the filter 16 and dried by the membrane dryer 15, to the equalization chamber 818 through the air guide pipe 14. After being rectified by the gradually increasing air vents 820 on the rectangular plate 819, and guided by the constraint plate 821 and the guide plate 822, a flat, slightly positive pressure stable airflow is formed, flowing towards the balance chamber 823. The suction pump 825 is started, and the suction pump 825 extracts the blown airflow through the return pipe 824 and discharges it to the outside, reducing the air pressure accumulation at the position of the balance chamber 823. After the switching is completed, following the above steps, the isolation frame 6 and the sealing plate 4 located at the top of the basket 3 are sealed. According to the position of the electronic product in the basket 3, the hydraulic rod 903 is activated. The output end of the hydraulic rod 903 extends, driving the movable plate 902 in the slot 901 to move towards the air duct 7, so that the adjusting plate 904 gradually covers the air outlet of the air duct 7. The motor 908 is activated, and the motor 908 drives the winding roller 906 to rotate, which tightens the wire rope 907 and drives the adjusting plate 904 to rotate against the torque of the torsion spring 905, thereby changing the flow direction of the cold and hot air blown out from the air duct 7, so that the airflow can directly impact the electronic product.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A temperature shock test chamber for electrical and electronic products, characterized in that, include: The test chamber body (1) has an experimental chamber (18) on it, and the inner wall of the experimental chamber (18) is provided with two air ducts (7). Basket (3), the basket (3) is located inside the experimental chamber (18), and the basket (3) is fixedly connected to two symmetrical closed plates (4) on the outside. An isolation frame (6) is located inside the experimental chamber (18). A crossbeam (5) is provided on the outside of the isolation frame (6), and the outside of the crossbeam (5) is fixedly connected to the inner wall of the experimental chamber (18). The composite closed module (8) is located inside the experimental chamber (18). The composite closed module (8) includes an annular airbag (804), which is disposed on the inner wall of the isolation frame (6). An equalization box (818) is disposed inside the experimental chamber (18), and a balance box (823) is disposed on the crossbeam (5). Two air guide modules (9) are located outside the two air ducts (7), and both air guide modules (9) include a deflector plate (904).

2. The temperature shock test chamber for electrical and electronic products according to claim 1, characterized in that, Also includes: Two cabinet doors (2) are symmetrical to each other, and the exterior of both cabinet doors (2) is connected to the exterior of the test chamber body (1) by hinges.

3. The temperature shock test chamber for electrical and electronic products according to claim 1, characterized in that, The composite closed module (8) also includes: The exhaust pipe (801) is located inside the round opening on both the experimental chamber (18) and the isolation frame (6). One end of the exhaust pipe (801) is fixedly connected to the outside of the annular airbag (804). The exhaust pipe (801) is connected to the annular airbag (804). A control valve (802) is provided on the outside of the exhaust pipe (801). An inflation tube (803) is provided on both the experimental chamber (18) and the isolation frame (6). The inflation tube (803) is located inside the opening and one end of the inflation tube (803) is connected to the annular airbag (804). Two reserved slots (805) are respectively set on two closed plates (4). The outer side of the closed plate (4) is provided with an arc-shaped groove. The outer side of the annular airbag (804) is in contact with the inner wall of the arc-shaped groove on the same side. An annular pipe network (809) is provided in both reserved slots (805).

4. The temperature shock test chamber for electrical and electronic products according to claim 3, characterized in that, The composite closed module (8) also includes: Multiple fine holes (806) are respectively set on the inner wall of two arc-shaped grooves. Multiple nozzles (810) are symmetrically distributed in a circular pattern on the outside of the two annular pipe networks (809). The nozzles (810) are all located in the fine holes (806) on the same side. Two lip seals (826) are respectively disposed on the inner walls of two arc grooves, and the outer side of the lip seals (826) is in contact with the outer side of the annular airbag (804). Two contact rods (815) are respectively set in two reserved slots (805). The inner walls of the two reserved slots (805) are provided with slot holes. The inner walls of the slot holes are slidably connected to the outside of the contact rods (815). One end of the contact rod (815) is in contact with the outside of the annular airbag (804), and the other end is fixedly connected to the compressed airbag (812). The outside of the two contact rods (815) is slidably connected to the fixed sleeves (811). The outside of the fixed sleeves (811) is fixedly connected to the inner wall of the reserved slots (805). The compressed airbags (812) are all located inside the fixed sleeves (811).

5. A temperature shock test chamber for electrical and electronic products according to claim 4, characterized in that, The composite closed module (8) also includes: Multiple return springs (817) are respectively disposed on the outside of two fixed sleeves (811). Two symmetrical cuts are opened on each of the two fixed sleeves (811). A movable plate is slidably connected in each cut. The movable plate is fixedly connected to the side opposite to the outside of the contact rod (815). One end of each return spring (817) is fixedly connected to the outside of the movable plate on the same side, and the other end is fixedly connected to the outside of the fixed sleeve (811) on the same side. Two hoses (813) are provided on the side of the compressed air bag (812) away from the contact rod (815), and a one-way valve (814) is provided on the outside of each hose (813). Two check valves (816) are respectively installed on two compressed air bags (812); Two silicone oil tanks (807) are located in two reserved slots (805) respectively. Both reserved slots (805) have notches, and inspection doors (808) are fixedly connected to the inner walls of the notches. The ends of two hoses (813) away from the compressed air bag (812) are fixedly connected to the outside of the two silicone oil tanks (807) respectively. Oil guide pipes are provided on the outside of the two inspection doors (808), and the other ends of the oil guide pipes are fixedly connected to the annular pipe network (809) on the same side.

6. The temperature shock test chamber for electrical and electronic products according to claim 5, characterized in that, The composite closed module (8) also includes: A diversion plate (822) is located above the isolation frame (6) and between the equalizing box (818) and the balancing box (823); A rectangular plate (819) is disposed inside a pressure equalization box (818), and a plurality of ventilation holes (820) are provided on the rectangular plate (819). Two constraint plates (821) are symmetrical to each other, and the exterior of each constraint plate (821) is fixedly connected to the inner wall of the equalizing box (818). The inner wall of the experimental chamber (18) is provided with a narrow opening. The return pipe (824) is located inside the narrow opening. One end of the return pipe (824) is located inside the balance box (823), and the other end is located outside the test chamber body (1). A suction pump (825) is fixedly connected to the outside of the test chamber body (1). The output end of the suction pump (825) is connected to the return pipe (824) through a round pipe.

7. A temperature shock test chamber for electrical and electronic products according to claim 6, characterized in that, The composite closed module (8) also includes: The air guide pipe (14) is fixedly connected to the outside of the equalizing box (818) at one end and a filter (16) is fixedly connected to the other end. A membrane dryer (15) is installed on the air guide pipe (14). A vacuum pump (17) is fixedly connected to the outside of the test chamber body (1). The output end of the vacuum pump (17) is connected to the air guide pipe (14) through a short pipe. Gas tank (10), the gas tank (10) is located outside the test chamber body (1), a delivery pipe (11) is fixedly connected to the outside of the gas tank (10), a switch valve (13) is provided outside the delivery pipe (11), and the end of the delivery pipe (11) away from the gas tank (10) is fixedly connected to the end of the inflation pipe (803). The external part of the pump (12) is fixedly connected to the external part of the test chamber body (1), and the pump (12) is located outside the delivery pipe (11).

8. The temperature shock test chamber for electrical and electronic products according to claim 1, characterized in that, The air guide module (9) also includes: Two grooves (901) are provided on the inner wall of the experimental chamber (18), and the two grooves (901) are located on the outside of the two air ducts (7); Two hydraulic rods (903) are provided. Two symmetrical notches are opened on the top and bottom inner walls of the experimental chamber (18). The inner walls of the notches are fixedly connected to the outside of the hydraulic rods (903). The output ends of the two hydraulic rods (903) on the same side are fixedly connected to the same movable plate (902).

9. A temperature shock test chamber for electrical and electronic products according to claim 8, characterized in that, The air guide module (9) also includes: Two shafts (910) and two movable plates (902) are fixedly connected to the outside of bosses. The bosses are fixedly connected to the outside of the shafts (910) on the same side. The outside of the two adjusting plates (904) are movably connected to the outside of the two shafts (910). The outside of the two shafts (910) is surrounded by torsion springs (905). One end of the torsion springs (905) is fixedly connected to the outside of the shafts (910) on the same side, and the other end is fixedly connected to the outside of the adjusting plates (904) on the same side.

10. A temperature shock test chamber for electrical and electronic products according to claim 9, characterized in that, The air guide module (9) also includes: Two winding rollers (906) are located outside the two movable plates (902) respectively. Both winding rollers (906) are movably connected to the outside of the two winding rollers (906). Both winding rollers (906) are fixedly connected to the outside of the two winding rollers (906). The output end of the motor (908) is connected to one side of the winding roller (906) on the same side through a coupling. Two guide rollers (909) are provided with support frames that are movably connected to the outside of each guide roller (909). The outside of each support frame is fixedly connected to the outside of the movable plate (902) on the same side. A wire rope (907) is provided on the outside of each guide roller (909). One end of each wire rope (907) is fixedly connected to the outside of the winding roller (906) on the same side, and the other end of each wire rope (907) is fixedly connected to the outside of the steering plate (904) on the same side.

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