High-low-temperature low-air-pressure test box

Abstract

The utility model discloses a high-low temperature low pressure test chamber, which comprises a test chamber main body and a plate type condenser, one side of the plate type condenser is provided with a cover plate, the inner side of the test chamber main body is fixedly connected with a moving mechanism, and one end of the moving mechanism is fixedly connected with a dust suction shell. A worker can control a first motor to drive a reciprocating lead screw to spirally rotate on the inner side of a sliding block when working is finished every day, so that the sliding block drives a dust suction shell to move along the side edge of the plate type condenser, and meanwhile, a suction fan can also clean dust on the surface of the plate type condenser through a filter cartridge, a telescopic pipe, the dust suction shell and a dust suction opening; therefore, manual cleaning is not needed, workers do not need to frequently disassemble and install the cover plate, work of the workers is facilitated, the workers can clean dust on the surface of the plate type filter every day, the influence of the dust on work of the plate type condenser is reduced, and the freezing efficiency of the test box body is guaranteed.

Description

Technical Field

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

[0002] High and low temperature low pressure test chambers are mainly used in aviation, aerospace, electronics, defense, scientific research and other industrial sectors to determine the reliability of electrical and electronic products (including components, materials and instruments). They conduct storage and transportation reliability tests under single or simultaneous high, low temperature and low pressure conditions, and can simultaneously test the electrical performance parameters of the test specimens by applying electricity. The high and low temperature low pressure test chamber mainly consists of a vacuum system, a refrigeration system, a heating system, a control system, and a wall temperature radiation system.

[0003] Currently used high and low temperature low pressure test chambers require plate condensers, which are installed inside the chamber and covered by a cover. During use, to ensure refrigeration efficiency, the surface of the plate condenser needs to be cleaned regularly with an air gun. Manual cleaning of the plate condenser is time-consuming, and the dust buildup on its surface before cleaning already affects its operation and refrigeration efficiency. Furthermore, the cover is bolted to the chamber, making disassembly and installation cumbersome and inconvenient for staff to clean daily. Therefore, a high and low temperature low pressure test chamber is proposed to address these issues. Utility Model Content

[0004] The technical problem to be solved by this utility model overcomes the existing defects and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high and low temperature low pressure test chamber includes a test chamber body and a plate condenser. A refrigeration system is fixedly connected to the inside of the test chamber body. The refrigeration system includes the plate condenser. A cover plate is provided on one side of the plate condenser and is fixedly connected to the test chamber body by bolts. A moving mechanism is fixedly connected to the inside of the test chamber body. A dust suction shell is fixedly connected to one end of the moving mechanism. A dust suction port is opened on the inside of the dust suction shell. A telescopic tube is fixedly connected to the bottom of the dust suction shell. A housing is fixedly connected to the other end of the telescopic tube. A support block is fixedly connected to the inside of the housing. A filter cartridge is fixedly connected to the top of the support block. A suction fan is provided below the filter cartridge and is fixedly connected to the housing. A cleaning mechanism is provided on the inside of the dust suction shell.

[0007] Preferably, the moving mechanism includes a support base fixedly connected to the main body of the test chamber, a first motor fixedly connected to one end of the support base, a reciprocating lead screw fixedly connected to the end of the main shaft of the first motor, the reciprocating lead screw being rotatably connected to the support base, and a slider being helically connected to the outer side of the reciprocating lead screw, and the slider being fixedly connected to the dust-absorbing shell.

[0008] Preferably, the inner side of the slider is slidably connected to a guide shaft, and the guide shaft is fixedly connected to the support base.

[0009] Preferably, the top of the housing is screwed with an end cap.

[0010] Preferably, the cleaning mechanism includes a second motor fixedly connected to the dust collection shell, and a cleaning roller is fixedly connected to the end of the main shaft of the second motor, with bristles provided on the outer side of the cleaning roller.

[0011] Preferably, a control system is provided at one end of the main body of the test chamber, and a heating system, a vacuum system, and a wall temperature radiation system are provided on the inner side of the main body of the test chamber.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The high and low temperature low pressure test chamber, through the setting of a first motor, reciprocating lead screw, guide shaft, slider, dust suction shell, and dust suction port, allows the operator to control the first motor to drive the reciprocating lead screw to rotate spirally inside the slider at the end of each workday. This causes the slider to move along the side of the plate condenser along with the dust suction shell. At the same time, the suction fan will clean the dust on the surface of the plate condenser through the filter cartridge, telescopic pipe, dust suction shell, and dust suction port. This eliminates the need for manual cleaning and frequent disassembly and reassembly of the cover by the operator, making the work more convenient. The operator can clean the dust on the surface of the plate filter every day, reducing the impact of dust on the operation of the plate condenser and thus ensuring the freezing efficiency of the test chamber.

[0014] 2. In the high and low temperature and low pressure test chamber, the second motor and cleaning roller are used to suck up the dust from the surface of the plate filter. The second motor will sweep the surface of the plate filter with the cleaning roller, so that the dust will fall off the surface of the plate filter, making it easier for the dust suction shell to suck up the dust. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the overall structure of the high and low temperature low pressure test chamber of this utility model.

[0017] Figure 2 This is a schematic diagram of the installation structure of the cover plate of the high and low temperature low pressure test chamber of this utility model.

[0018] Figure 3 This is a schematic diagram of the installation structure of the plate condenser in the high and low temperature low pressure test chamber of this utility model.

[0019] Figure 4 This is a schematic diagram of the installation structure of the dust-absorbing shell of the high and low temperature low pressure test chamber of this utility model.

[0020] Figure 5 This is a schematic diagram of the installation structure of the cleaning roller in the high and low temperature low pressure test chamber of this utility model.

[0021] Figure 6 This is a schematic diagram of the installation structure of the filter cartridge of the high and low temperature low pressure test chamber of this utility model.

[0022] In the diagram: 1. Main body of the test chamber; 2. Plate condenser; 3. Support base; 4. First motor; 5. Reciprocating lead screw; 6. Guide shaft; 7. Slider; 8. Dust suction shell; 9. Dust suction port; 10. Second motor; 11. Cleaning roller; 12. Telescopic tube; 13. Shell; 14. Support block; 15. Filter cartridge; 16. Fan; 17. End cap; 18. Cover plate; 19. Control system; 20. Refrigeration system; 21. Heating system; 22. Vacuum system; 23. Wall temperature radiation system. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] To make the technical means, creative features, and achieved objectives and effects of this utility model easy to understand, it should be noted in the description of this utility model that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described below in conjunction with specific embodiments.

[0025] Example

[0026] like Figure 1-6 As shown, the high and low temperature low pressure test chamber includes a test chamber body 1 and a plate condenser 2. A refrigeration system 20 is fixedly connected to the inner side of the test chamber body 1. The refrigeration system 20 includes the plate condenser 2. A cover plate 18 is provided on one side of the plate condenser 2, and the cover plate 18 is fixedly connected to the test chamber body 1 by bolts. A moving mechanism is fixedly connected to the inner side of the test chamber body 1. A dust suction shell 8 is fixedly connected to one end of the moving mechanism. A dust suction port 9 is opened on the inner side of the dust suction shell 8. A telescopic tube 12 is fixedly connected to the bottom end of the dust collection shell 8, and a housing 13 is fixedly connected to the other end of the telescopic tube 12. The telescopic tube 12 can ensure that the dust collection shell 8 can move normally in the horizontal direction. A support block 14 is fixedly connected to the inner side of the housing 13, and a filter cylinder 15 is fixedly connected to the top of the support block 14. The filter cylinder 15 can realize the centralized storage of dust. A suction fan 16 is provided below the filter cylinder 15, and the suction fan 16 is fixedly connected to the housing 13. A cleaning mechanism is provided on the inner side of the dust collection shell 8.

[0027] As a further improvement to this utility model, such as Figure 3 , Figure 4As shown, the moving mechanism includes a support base 3 fixedly connected to the main body 1 of the test chamber. A first motor 4 is fixedly connected to one end of the support base 3. A reciprocating screw 5 is fixedly connected to the end of the main shaft of the first motor 4. The reciprocating screw 5 is rotatably connected to the support base 3. A slider 7 is helically connected to the outer side of the reciprocating screw 5, and the slider 7 is fixedly connected to the dust suction shell 8. At the end of each workday, the operator can control the first motor 4 to rotate the reciprocating screw 5 helically inside the slider 7, so that the slider 7 moves along the side of the plate condenser 2 by carrying the dust suction shell 8. At the same time, the suction fan 16 will also clean the dust on the surface of the plate condenser 2 through the filter cartridge 15, the telescopic tube 12, the dust suction shell 8, and the dust suction port 9. This eliminates the need for manual cleaning and the need for operators to frequently disassemble and install the cover plate 18, making the work more convenient for the operators. This allows the operators to clean the dust on the surface of the plate filter 2 every day, reducing the impact of dust on the operation of the plate condenser 2, thereby ensuring the freezing efficiency of the main body 1 of the test chamber.

[0028] As a further improvement to this utility model, such as Figure 3 , Figure 4 As shown, the inner side of the slider 7 is slidably connected to the guide shaft 6, and the guide shaft 6 is fixedly connected to the support base 3. The guide shaft 6 can ensure that the slider 7 works stably in the horizontal direction.

[0029] As a further improvement to this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the top of the housing 13 is screwed with an end cap 17, which can seal the housing 13. At the same time, removing the end cap 17 makes it easier to clean the dust inside the filter cartridge 15.

[0030] As a further improvement to this utility model, such as Figure 5 As shown, the cleaning mechanism includes a second motor 10 fixedly connected to the dust suction shell 8. A cleaning roller 11 is fixedly connected to the end of the main shaft of the second motor 10. The outer side of the cleaning roller 11 is provided with bristles. When the dust suction shell 8 sucks up the dust on the surface of the plate filter 2, the second motor 10 will carry the cleaning roller 11 to clean the surface of the plate filter 2, so that the dust falls off the surface of the plate filter 2, making it easier for the dust suction shell 8 to suck up the dust.

[0031] As a further improvement to this utility model, such as Figure 3As shown, a control system 19 is provided at one end of the test chamber body 1, and a heating system 21, a vacuum system 22, and a wall temperature radiation system 23 are provided inside the test chamber body 1. The control system 19, the cooling system 20, the heating system 21, the vacuum system 22, and the wall temperature radiation system 23 are all existing technologies. The control system 19 includes a control panel, which includes a temperature and air pressure control display screen, an over-temperature protection setting device, a running indicator light, a fault indicator light, and a buzzer.

[0032] The refrigeration system 20 includes a refrigeration compressor, an evaporator, a plate heat exchanger, a thermostatic expansion valve, a capillary tube, and an evaporator-condenser.

[0033] Vacuum system 22 includes a vacuum pump, a suction filter, a gas ballast valve, an oil filter, a check valve, and a vibration damping tube;

[0034] The heating system 21 includes heaters, which are nickel-chromium alloy electric heating wire heaters and wall-tube heating tubes. The nickel-chromium alloy electric heating wire heaters are used for heating the main chamber for constant temperature and humidity testing. Another set of inner chamber wall heaters and wall-tube heating tubes are used for constant temperature testing of the main chamber under vacuum. All heaters are controlled by contactless solid-state relays and are equipped with fast-blow fuses to protect the solid-state relays.

[0035] The wall-heated radiant system 23 includes a wall-radiant cooling heat exchanger, which can be a coil-type evaporator.

[0036] Meanwhile, when the air pressure is normal or high (specific values ​​are determined by testing), the air inside the chamber is ventilated by force to achieve thermal balance in order to ensure uniform temperature and humidity distribution. An air conditioning channel is provided at the rear of the main chamber, including the channel frame, fan and its power transmission mechanism, as well as vacuum chamber wall heater and wall evaporator.

[0037] Furthermore, the channel frame, welded from stainless steel pipes, bears the weight of the fan casing, heater, evaporator, and other components. To ensure its stability, it is directly connected to the rear wall of the external pressure tank.

[0038] The fan and its power transmission mechanism are centrifugal fans. The fan drive motor is located outside the pressure tank, and the power fan and its power transmission mechanism inside use magnetic transmission. The fan drive motor has a variable speed controller to adapt to the wind speed requirements of different test conditions;

[0039] In a vacuum environment, the inner chamber wall heaters and wall-mounted evaporators are used because the efficiency of gas flow heat transfer becomes very low under low pressure. In this case, radiative heat transfer is employed to maintain the temperature inside the chamber. This equipment is equipped with wall heaters and wall-mounted evaporators to achieve radiative heat transfer. Wall heaters and wall-mounted evaporators are installed on the left, right, and top surfaces of the inner chamber.

[0040] Workflow: The control programs for the first motor 4, the second motor 10, and the suction fan 16 are set on the control panel of the main body 1 of the test chamber. When cleaning dust from the surface of the plate condenser 2 is required, the operator simply presses the button on the control panel. At the end of each workday, the operator can control the first motor 4 to rotate the reciprocating screw 5 inside the slider 7 via the button on the control panel. This causes the slider 7 to move along the side of the plate condenser 2 along with the dust suction shell 8. Simultaneously, the suction fan 16 also cleans the plate condenser 2 through the filter cartridge 15, the telescopic pipe 12, the dust suction shell 8, and the dust suction port 9. The dust on the surface of the plate filter 2 is cleaned, eliminating the need for manual cleaning and frequent disassembly and reassembly of the cover plate 18 by the staff. This simplifies the work for the staff, allowing them to clean the dust on the surface of the plate filter 2 daily, reducing the impact of dust on the operation of the plate condenser 2 and thus ensuring the freezing efficiency of the test chamber body 1. When the dust suction shell 8 sucks up the dust on the surface of the plate filter 2, the second motor 10 will drive the cleaning roller 11 to sweep the surface of the plate filter 2, causing the dust to fall off the surface of the plate filter 2, making it easier for the dust suction shell 8 to suck up the dust.

[0041] The above are preferred embodiments of the present invention. The basic principles, main features, and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the scope of protection of the present invention. All such changes and modifications fall within the scope of protection of the present invention as defined by the appended claims and their equivalents.

Claims

1. A high and low temperature low pressure test chamber, comprising a test chamber body (1) and a plate condenser (2), characterized in that: A refrigeration system (20) is fixedly connected to the inner side of the test chamber body (1). The refrigeration system (20) includes a plate condenser (2). A cover plate (18) is provided on one side of the plate condenser (2), and the cover plate (18) is fixedly connected to the test chamber body (1) by bolts. A moving mechanism is fixedly connected to the inner side of the test chamber body (1). A dust-collecting shell (8) is fixedly connected to one end of the moving mechanism. A dust-collecting port (9) is opened on the inner side of the dust-collecting shell (8). The bottom end of the dust-collecting shell (8) is fixedly connected to a telescopic tube (12), the other end of the telescopic tube (12) is fixedly connected to a housing (13), the inner side of the housing (13) is fixedly connected to a support block (14), the top end of the support block (14) is fixedly connected to a filter cylinder (15), a suction fan (16) is provided below the filter cylinder (15), and the suction fan (16) is fixedly connected to the housing (13). A cleaning mechanism is provided on the inner side of the dust-collecting shell (8).

2. The high and low temperature low pressure test chamber according to claim 1, characterized in that: The moving mechanism includes a support base (3) fixedly connected to the test chamber body (1). A first motor (4) is fixedly connected to one end of the support base (3). A reciprocating screw (5) is fixedly connected to the end of the main shaft of the first motor (4). The reciprocating screw (5) is rotatably connected to the support base (3). A slider (7) is helically connected to the outside of the reciprocating screw (5), and the slider (7) is fixedly connected to the dust-absorbing shell (8).

3. The high and low temperature low pressure test chamber according to claim 2, characterized in that: The inner side of the slider (7) is slidably connected to a guide shaft (6), and the guide shaft (6) is fixedly connected to the support base (3).

4. The high and low temperature low pressure test chamber according to claim 2, characterized in that: The top of the housing (13) is screwed with an end cap (17).

5. The high and low temperature low pressure test chamber according to claim 1, characterized in that: The cleaning mechanism includes a second motor (10) fixedly connected to the dust suction shell (8), and a cleaning roller (11) is fixedly connected to the end of the main shaft of the second motor (10). The cleaning roller (11) is provided with bristles on its outer side.

6. The high and low temperature low pressure test chamber according to claim 1, characterized in that: A control system (19) is provided at one end of the test chamber body (1), and a heating system (21), a vacuum system (22), and a wall temperature radiation system (23) are provided on the inner side of the test chamber body (1).

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