A high and low temperature damp heat low air pressure test box

Abstract

The utility model discloses a high and low temperature damp heat low air pressure test box, including box, cavity and air pump, the surface of box is provided with recessed type frame, and the bottom of recessed type frame is provided with bottom plate, the inside of box is opened at cavity, and the inside both sides of cavity are fixed with riser respectively, the utility model discloses the cooperation of air pressure control module and air pump, air pressure sensor can accurately increase or reduce the air pressure value in the box, satisfies the strict requirement of different test to air pressure environment, through adjusting the placement mechanism to make the height of the placement board can be adjusted flexibly, can adapt to the placement demand of different specifications, height's test sample, and the convenient test of a variety of types'sample, through the observation window on the cabinet door, the state of test sample is observed in real time to the operator, need not open the cabinet door and disturb test environment, and the setting of processor and control unit realizes the intelligent control to test box air pressure parameter, and the operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of air pressure test chamber technology, specifically a high and low temperature humidity and low air pressure test chamber. Background Technology

[0002] Low-pressure test chambers are mainly used in aviation, aerospace, information, and electronics fields to determine the environmental adaptability and reliability of instruments, electrical products, materials, components, and equipment under single or simultaneous low-pressure, high-temperature, and low-temperature conditions, and to measure the electrical performance parameters of the test specimens by energizing them.

[0003] In the existing technology, traditional high and low temperature humidity and low pressure test chambers usually use simple air pressure regulating devices, such as manual valves to control the input and output of gas, and the mechanism for placing samples is mostly a fixed-height bracket.

[0004] Traditional test chambers rely on manual valve operation for air pressure regulation, which makes it difficult to accurately control the air pressure value and easily leads to large air pressure fluctuations, failing to meet the testing requirements with strict air pressure environment requirements. At the same time, the fixed height sample placement bracket cannot adapt to test samples of different specifications and heights, resulting in poor applicability of the test chamber. When facing tests of various types of samples, it is necessary to frequently change equipment or make complex adjustments, affecting test efficiency and the reliability of results.

[0005] In view of this, we have launched a high and low temperature humidity and low pressure test chamber. Utility Model Content

[0006] The purpose of this invention is to provide a high and low temperature humidity and low pressure 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 high and low temperature humidity and low pressure test chamber, comprising: a chamber body, a cavity, and an air pump;

[0008] The surface of the box is provided with a concave frame, and the bottom of the concave frame is provided with a base plate;

[0009] The cavity is formed inside the box body, and upright plates are fixedly installed on both sides of the cavity;

[0010] The air pump is located at the top of the housing and between the two sets of concave frames;

[0011] The top of the housing is equipped with a pressure control module located on one side of the air pump. The main pipe, air supply pipe and air outlet of the pressure control module work together to allow the air pump to deliver gas into the cavity and discharge gas outward, thereby increasing or decreasing the air pressure value inside the housing.

[0012] Preferably, the air pressure control module includes a flat plate connected to the top wall of the cavity, the main pipe connected to one side of the air pump, a T-shaped pipe connected to the bottom of the main pipe, the air supply pipe connected to the side of the T-shaped pipe, and the air outlet connected to the bottom of the air supply pipe. The air outlet passes through the flat plate, a mounting plate is connected to the bottom of the flat plate, and an air pressure sensor is connected to the surface of the mounting plate.

[0013] Preferably, an electric valve is connected to the top of the gas outlet on the surface of the gas pipeline. The electric valve is installed at the top of the gas outlet on the surface of the gas pipeline and is a key component for controlling gas flow. The electric valve adopts a high-performance electric actuator and a sealing valve, which has the characteristics of fast response speed and good sealing performance. The electric valve is connected to the control unit through an electric wire. The control unit controls the opening and closing of the electric valve according to the instructions issued by the processor.

[0014] Preferably, there are two sets of upright plates, and an adjustment and placement mechanism is provided between the two sets of upright plates. The placement plate of the adjustment and placement mechanism and the concave frame are used in conjunction to adjust the placement plate between the two sets of upright plates.

[0015] Preferably, the adjustment and placement mechanism includes a bolt connected to one side of the concave frame, the placement plate is connected between the two sets of upright plates, the concave frame is connected to the side of the placement plate, the concave frame is inserted into the surface of the upright plate, and the bolt is inserted into the interior of the upright plate.

[0016] Preferably, the inner side of the concave frame is connected to a slider, and the surface of the upright plate is provided with a groove for sliding the slider. The slider is installed on the inner side of the concave frame and is usually made of wear-resistant, low-friction engineering plastic or metal. The slider and the concave frame are connected by welding, bonding or bolting to ensure the connection is firm. The groove on the surface of the upright plate matches the shape and size of the slider. The cooperation between the slider and the groove makes the sliding of the concave frame on the surface of the upright plate more stable and smooth, greatly reducing the difficulty of adjusting the position of the placement plate.

[0017] Preferably, the surface of the upright plate is provided with screw holes for bolts. The screw holes are opened on the surface of the upright plate at a certain spacing and layout, and their size and precision are matched with the bolts to ensure that the bolts can be screwed in smoothly and achieve a good tightening effect. The inner wall of the screw hole is finely processed to have good smoothness and thread precision, preventing stripping or thread damage during the tightening of the bolts.

[0018] Preferably, the surface of the enclosure is connected to a cabinet door, and the surface of the cabinet door is connected to an observation window.

[0019] Preferably, a processor is connected to the surface of the cabinet door, and a control unit is connected to the surface of the upright plate below the processor.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] (1) Through the cooperation of the air pressure control module with the air pump and air pressure sensor, the air pressure value inside the chamber can be accurately increased or decreased to meet the strict requirements of different tests on the air pressure environment, provide stable and reliable air pressure conditions for the test, and ensure the accuracy and reliability of the test results.

[0022] (2) By adjusting the placement mechanism, the height of the placement plate can be flexibly adjusted to meet the placement requirements of test samples of different specifications and heights, thereby improving the applicability of the test chamber and facilitating the testing of various types of samples.

[0023] (3) The observation window on the cabinet door allows operators to observe the status of the test samples in real time without opening the cabinet door and interfering with the test environment. The processor and control unit enable intelligent control of parameters such as air pressure in the test chamber, making operation convenient and improving the efficiency and automation of the test. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the box body and the placement plate of this utility model when disassembled;

[0025] Figure 2 This is a schematic diagram of the structure of the air pump, main pipeline and flat plate of this utility model when they are connected in three dimensions.

[0026] Figure 3 This is a schematic diagram of the three-dimensional connection of the flat plate, air outlet and air pressure sensor of this utility model.

[0027] Figure 4 This is a schematic diagram of the three-dimensional connection structure of the box body of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure when the placement plate and the concave frame of this utility model are connected;

[0029] Figure 6 This is a top view of the concave frame of this utility model.

[0030] Figure 7 This is a structural diagram of the box body and the placement plate of this utility model when connected in three dimensions.

[0031] In the diagram: 1. Cabinet; 2. Concave frame; 3. Base plate; 4. Air pump; 5. Main pipe; 6. T-pipe; 7. Cabinet door; 8. Observation window; 9. Processor; 10. Control unit; 11. Air supply pipe; 12. Electric valve; 13. Flat plate; 14. Air outlet; 15. Mounting plate; 16. Air pressure sensor; 17. Cavity; 18. Vertical plate; 19. Slide groove; 20. Screw hole; 21. Placement plate; 22. Concave frame; 23. Bolt; 24. Slider. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0034] Please see Figure 1-7 This utility model provides a technical solution: a high and low temperature humidity and low pressure test chamber, comprising: a chamber body 1, wherein a concave frame 2 is provided on the surface of the chamber body 1, and a bottom plate 3 is provided at the bottom of the concave frame 2;

[0035] Cavity 17 is located inside the chamber 1. Upright plates 18 are fixedly installed on both sides of the cavity 17. Cavity 17 is the core working area of ​​the test chamber, used to accommodate the test items and simulate different environmental conditions. Its internal space is carefully designed to meet the placement requirements of items of various specifications and sizes.

[0036] Air pump 4 is installed on the top of the chamber 1 and between the two sets of concave frames 2. As a key power component for regulating the air pressure of the test chamber, the air pump 4 is a high-performance, wear-resistant air pump that can stably provide gas delivery and extraction functions.

[0037] A pressure control module is installed on the top of the housing 1, located on one side of the air pump 4. Through the coordinated use of the main pipe 5, the air supply pipe 11, and the air outlet 14 of the pressure control module, the air pump 4 can deliver gas into the cavity 17 and discharge gas outward, thereby increasing or decreasing the pressure value inside the housing 1.

[0038] The air pressure control module includes a flat plate 13 connected to the top wall of the cavity 17. The main pipe 5 is connected to one side of the air pump 4. A three-way pipe 6 is connected to the bottom of the main pipe 5. The air supply pipe 11 is connected to the side of the three-way pipe 6, and the air outlet 14 is connected to the bottom of the air supply pipe 11. The air outlet 14 penetrates the flat plate 13. A mounting plate 15 is connected to the bottom of the flat plate 13. An air pressure sensor 16 is connected to the surface of the mounting plate 15. As an important component of the air pressure control module, the flat plate 13 is firmly connected to the top wall of the cavity 17 by bolts or welding, serving to support and fix the air supply pipe 11, the air outlet 14, and the mounting plate 15. The flat plate 13 is made of high-strength, corrosion-resistant metal material, with good flatness and rigidity, ensuring that the air outlet 14 is vertically downward, so that the gas is evenly distributed in the cavity 17. The main pipe 5 and the air pump 4 are sealed. A reliable connection method, such as flange connection or quick coupling connection, ensures no leakage during gas transmission. The tee pipe 6 diverts the gas transmitted from the main pipe 5 to different gas transmission pipes 11. The gas transmission pipes 11 and the tee pipe 6 are fixed by threaded connection or welding to ensure the connection is firm and airtight. The gas outlet 14 passes through the plate 13, and the penetration is sealed with sealant or sealing ring to prevent gas leakage from the connection between the plate 13 and the gas outlet 14. The mounting plate 15 is fixed to the bottom of the plate 13 with bolts to provide a mounting platform for the pressure sensor 16. The pressure sensor 16 is a high-precision and high-reliability pressure sensor that can accurately monitor the air pressure value in the cavity 17 in real time and transmit the data to the processor 9. The processor 9 can then control the working status of the air pump 4 and the electric valve 12 according to the preset air pressure parameters to achieve closed-loop control of the air pressure in the test chamber.

[0039] An electric valve 12 is connected to the top of the outlet 14 on the surface of the gas pipeline 11. The electric valve 12 is installed on the top of the outlet 14 on the surface of the gas pipeline 11 and is a key component for controlling gas flow. The electric valve 12 adopts a high-performance electric actuator and a sealing valve, which has the characteristics of fast response speed and good sealing performance. The electric valve 12 is connected to the control unit 10 through a wire. The control unit 10 controls the opening and closing of the electric valve 12 according to the instructions issued by the processor 9.

[0040] The number of upright plates 18 is two sets, and an adjustment and placement mechanism is provided between the two sets of upright plates 18. The placement plate 21 and the concave frame 22 of the adjustment and placement mechanism are used in conjunction to adjust the placement plate 21 between the two sets of upright plates 18.

[0041] The adjustment and placement mechanism includes a bolt 23 connected to one side of the concave frame 22. The placement plate 21 is connected between the two sets of upright plates 18. The concave frame 22 is connected to the side of the placement plate 21. The concave frame 22 is inserted into the surface of the upright plate 18, and the bolt 23 is inserted into the interior of the upright plate 18. The bolt 23 serves as a fixing component of the adjustment and placement mechanism and is installed on one side of the concave frame 22 by a threaded connection. When it is necessary to adjust the position of the placement plate 21, the operator first loosens the bolt 23 so that the concave frame 22 can slide freely on the surface of the upright plate 18. After adjusting the placement plate 21 to a suitable position, the operator tightens the bolt 23 so that the bolt 23 is inserted into the screw hole 20 inside the upright plate 18. Through the threaded fastening force between the bolt 23 and the screw hole 20, the concave frame 22 and the placement plate 21 are firmly fixed to the upright plate 18. The bolt 23 is made of high-strength metal material, which has good wear resistance and corrosion resistance, and can maintain a stable fastening effect.

[0042] The inner side of the concave frame 22 is connected to a slider 24, and the surface of the upright plate 18 is provided with a groove 19 for sliding the slider 24. The slider 24 is installed on the inner side of the concave frame 22 and is usually made of wear-resistant, low-friction engineering plastic or metal. The slider 24 and the concave frame 22 are connected by welding, bonding or bolting to ensure the connection is firm. The groove 19 on the surface of the upright plate 18 matches the shape and size of the slider 24. The cooperation between the slider 24 and the groove 19 makes the sliding of the concave frame 22 on the surface of the upright plate 18 more stable and smooth, greatly reducing the difficulty of adjusting the position of the placement plate 21.

[0043] The surface of the upright plate 18 is provided with screw holes 20 for screwing bolts 23. The screw holes 20 are opened on the surface of the upright plate 18 at certain intervals and in a certain layout. Their size and precision match the bolts 23 to ensure that the bolts 23 can be screwed in smoothly and achieve a good tightening effect. The inner wall of the screw holes 20 is finely processed to have good smoothness and thread precision, preventing stripping or thread damage during the tightening of bolts 23.

[0044] The surface of the chamber 1 is connected to a cabinet door 7, and the surface of the cabinet door 7 is connected to an observation window 8. The cabinet door 7 is installed on the surface of the chamber 1 by connecting components such as hinges or hinges, which can be opened and closed flexibly. The cabinet door 7 is made of high-strength metal material of the same or similar material as the chamber 1, and a sealing strip is set at the edge to ensure that the cabinet door 7 can fit tightly with the chamber 1 after closing, forming a good sealing effect and preventing the high and low temperature, humidity and low pressure environment inside the test chamber from being interfered with by external factors. The observation window 8 is installed on the surface of the cabinet door 7. The observation window 8 is made of double or multi-layer high-strength, high temperature and high pressure resistant glass material, filled with inert gas in the middle, which has good heat insulation, sound insulation and light transmission performance. The edge of the observation window 8 is specially treated and sealed with the cabinet door 7 by sealant or sealing ring to prevent outside air and moisture from entering the test chamber. Through the observation window 8, the operator can observe the status of the test items and the test process inside the test chamber in real time without opening the cabinet door 7, which not only ensures the stability of the test environment, but also facilitates test operation and data recording.

[0045] The surface of the cabinet door 7 is connected to a processor 9, and the surface of the upright plate 18, located below the processor 9, is connected to a control unit 10. The processor 9, as the core control hub of the test chamber, adopts a high-performance microprocessor chip and has powerful data processing and computing capabilities. The processor 9 is connected to various sensors (such as the air pressure sensor 16), actuators (such as the air pump 4 and the electric valve 12) and control unit 10 in the test chamber through wires, and receives and processes data information from various components in real time. The processor 9 precisely controls and adjusts the environmental conditions (such as air pressure, temperature, humidity, etc.) in the test chamber according to the preset test program and parameters.

[0046] The main technical parameters are for standard equipment: data under normal pressure and no-load conditions.

[0047] Nominal internal volume (m 3 ), 720, 1000, 2370;

[0048] Temperature range (ambient temperature): 20℃~+160℃, -70℃~+160℃;

[0049] Pressure range: atmospheric pressure to 0.5 kPa (drying in the chamber);

[0050] Humidity range (humid and hot type), ≤0.5°C (GB / T5170.2-2008);

[0051] Temperature deviation, ≤ ±2.0℃C (at normal pressure, no load);

[0052] Temperature deviation (humid heat type): ±3.0%RH (when >75%RH), ±5%RH (when ≤75%RH);

[0053] Heating rate, ≤60min (20℃→+160℃);

[0054] Cooling rate (20℃→-65℃) ≤ 60 / 90min (different models have different times);

[0055] Pressure reduction time (at normal pressure 1kPa) ≤ 25 / 30 / 45min (different models have different times);

[0056] Rapid depressurization function (optional): Within 15 seconds, the air pressure drops from 75.5 kPa to 18.8 kPa;

[0057] Explosion decompression function (optional): The air pressure drops from 75.5 kPa to 18.8 kPa within 0.1 seconds.

[0058] Internal dimensions:

[0059] Width 800-1000-1300;

[0060] Height 900-1000-1300;

[0061] 1000-1000-1400

[0062] Condensation methods include air cooling and water cooling;

[0063] Input power is 380V (three-phase four-wire + grounding wire).

[0064] Specifically, during use, when it is necessary to place test samples, the adjustment placement mechanism comes into play. The concave frames 22 connected to both sides of the placement plate 21 cooperate with the sliding grooves 19 on the surface of the upright plate 18 through the inner sliders 24, so that the placement plate 21 can slide up and down between the two sets of upright plates 18, thereby adjusting the height position of the placement plate 21. After adjusting to a suitable height, the bolts 23 on one side of the concave frame 22 are inserted into the corresponding screw holes 20 on the surface of the upright plate 18 and the bolts 23 are tightened to fix the placement plate 21 in this position. When the test samples are larger, the placement plate 21 can be disassembled out of the box 1, so that test samples of different specifications and heights can be placed conveniently.

[0065] When the air pressure inside the test chamber needs to be adjusted, the air pump 4 starts working. The air pump 4 delivers gas to the air pressure control module through the main pipe 5. The three-way pipe 6 connected to the bottom of the main pipe 5 diverts the gas. A portion of the gas can enter the cavity 17 through the gas supply pipe 11 and the air outlet 14, thereby increasing the air pressure value inside the chamber 1. When the air pressure needs to be reduced, the air pump 4 works in reverse, discharging the gas in the cavity 17 out of the chamber 1 through the air outlet 14, the gas supply pipe 11, the three-way pipe 6, and the main pipe 5. During this process, the air pressure sensor 16 installed on the mounting plate 15 monitors the air pressure inside the cavity 17 in real time and feeds the data back to the processor 9. The processor 9 compares and analyzes the preset air pressure value with the real-time monitored air pressure value, and controls the opening and closing degree of the electric valve 12 through the control unit 10 to precisely adjust the gas flow rate, thereby achieving precise control of the air pressure inside the chamber 1.

[0066] The overall workflow is as follows: First, open cabinet door 7 and place the test sample on the adjusted placement plate 21. Cabinet door 7 is hinged to chamber 1, with an opening angle of 120°. After closing cabinet door 7, set the required air pressure parameters through processor 9 on the surface of cabinet door 7. Under the control of processor 9 and control unit 10, air pump 4 regulates the air pressure inside chamber 1 through air pressure control module. During the test, the operator can observe the changes in the state of the test sample under different air pressure environments in real time through observation window 8 on the surface of cabinet door 7. Air pressure sensor 16 continuously monitors the air pressure. The air pressure data (air pressure sensor 16 continuously monitors air pressure changes at a high-frequency sampling frequency (e.g., 10 times / second). When the air pressure value is detected to deviate from the preset range of ±0.5kPa, the signal is immediately transmitted to the processor 9. The processor 9 calculates the gas flow rate that needs to be adjusted through a PID algorithm. For example, when the air pressure is lower than the set value, the electric valve 12 is instructed to increase its opening by 20%, and the power of the air pump 4 is increased by 15% until the air pressure stabilizes within the target value of ±0.2kPa) and feeds the information back to the processor 9 to ensure that the air pressure in the test chamber is always maintained within the set range.

[0067] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high and low temperature humidity and low pressure test chamber, characterized in that, include: Box body (1), the surface of the box body (1) is provided with a concave frame (2), and the bottom of the concave frame (2) is provided with a bottom plate (3); A cavity (17) is formed inside the box (1), and upright plates (18) are fixedly installed on both sides inside the cavity (17); An air pump (4) is installed on the top of the housing (1) and located between the two sets of concave frames (2); The top of the housing (1) is provided with a pressure control module on one side of the air pump (4). Through the cooperation of the main pipe (5), the air supply pipe (11) and the air outlet (14) of the pressure control module, the air pump (4) can deliver gas into the cavity (17) and discharge gas outward, thereby increasing or decreasing the pressure value inside the housing (1).

2. The high and low temperature humidity and low pressure test chamber according to claim 1, characterized in that, The air pressure control module includes a flat plate (13) connected to the top wall of the cavity (17), the main pipe (5) is connected to one side of the air pump (4), the bottom of the main pipe (5) is connected to a three-way pipe (6), the air supply pipe (11) is connected to the side of the three-way pipe (6), and the air outlet (14) is connected to the bottom of the air supply pipe (11). The air outlet (14) penetrates the flat plate (13), the bottom of the flat plate (13) is connected to a mounting plate (15), and the surface of the mounting plate (15) is connected to an air pressure sensor (16).

3. The high and low temperature humidity and low pressure test chamber according to claim 2, characterized in that, The surface of the gas pipeline (11) is located at the top of the gas outlet (14) and is connected to an electric valve (12).

4. The high and low temperature humidity and low pressure test chamber according to claim 1, characterized in that, The number of the upright plates (18) is two sets, and an adjustment and placement mechanism is provided between the two sets of upright plates (18). The placement plate (21) and the concave frame (22) of the adjustment and placement mechanism are used in conjunction to adjust the placement plate (21) between the two sets of upright plates (18).

5. A high and low temperature humidity and low pressure test chamber according to claim 4, characterized in that, The adjustment and placement mechanism includes a bolt (23) connected to one side of the concave frame (22), the placement plate (21) is connected between the two sets of the upright plates (18), the concave frame (22) is connected to the side of the placement plate (21), the concave frame (22) is inserted into the surface of the upright plate (18), and the bolt (23) is inserted into the interior of the upright plate (18).

6. A high and low temperature humidity and low pressure test chamber according to claim 5, characterized in that, The inner side of the concave frame (22) is connected to a slider (24), and the surface of the upright plate (18) is provided with a groove (19) for sliding the slider (24).

7. A high and low temperature humidity and low pressure test chamber according to claim 5, characterized in that, The surface of the upright plate (18) is provided with screw holes (20) for screwing bolts (23).

8. A high and low temperature humidity and low pressure test chamber according to claim 1, characterized in that, The surface of the box (1) is connected to a cabinet door (7), and the surface of the cabinet door (7) is connected to an observation window (8).

9. A high and low temperature humidity and low pressure test chamber according to claim 8, characterized in that, The surface of the cabinet door (7) is connected to a processor (9), and the surface of the upright plate (18) located below the processor (9) is connected to a control unit (10).

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