A high-low temperature impact test chamber

Abstract

The utility model provides a high and low temperature impact test box, including impact test box, the inside of impact test box is high temperature test area and low temperature test area, is provided with test basket in test area, test basket is connected with the lifting assembly behind impact test box inside, is used for drive test basket to lift between high temperature test area and low temperature test area, the side surface of high temperature test area and low temperature test area is provided with the exchange hole, and the exchange hole is communicated to temperature control component, is used for controlling the temperature of high temperature test area and low temperature test area. The utility model, through setting first capillary and second capillary, and cooperate with the flow divider, can accurate distribution refrigerant's flow according to high and low temperature test area's refrigeration demand, both satisfy low temperature area forced cold load, and avoid high temperature area excessive refrigeration, reduce refrigerant invalid circulation, reduce compressor energy consumption, improve whole machine temperature control precision and energy saving nature.

Description

Technical Field

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

[0002] The high and low temperature impact tester is a device that tests the resistance (such as mechanical strength, stability, etc.) of materials or products under rapid temperature changes by rapidly alternating between high and low temperature environments. It is widely used in the fields of electronics, automobiles, aerospace and other industries.

[0003] A search revealed that application number CN202323060021.6 discloses a thermal shock testing machine, comprising a high and low temperature thermal shock testing machine. A control electrical cabinet is located on the right side of the machine. An oven is located at the top of the machine, and an industrial freezer is located at the bottom. Support legs are fixedly installed at the four corners of the lower outer surface of the machine. A rotating alarm indicator light is located at one corner of the upper outer surface of the machine. An energy-saving circulating ventilation component is fixedly installed in the middle of the upper outer surface. A suspended basket is installed inside the industrial freezer. This thermal shock testing machine utilizes the heat from the stale air discharged from the oven to preheat the incoming fresh air, saving costs and facilitating stable lifting and lowering of the suspended basket.

[0004] However, when the above-mentioned equipment is in use, the lifting cylinder is installed in a cold zone, which is susceptible to the effects of low temperature environment: low temperature will cause the cylinder seals to harden, the lubricating oil viscosity to increase, reduce the sealing performance and response speed, and aggravate component wear; frost or condensation in the cold zone may cause the cylinder vent to freeze and block, and metal parts to rust, causing lifting jamming or displacement, interfering with the test accuracy; at the same time, the cylinder is in a cold and hot environment for a long time, which will cause material fatigue due to thermal expansion and contraction, shortening the service life, and the low temperature environment also increases the difficulty and cost of maintenance; in other existing technologies, the refrigeration system mostly adopts a single capillary tube or a split structure with non-adjustable flow, which is difficult to match the different refrigeration needs of high and low temperature zones, and is prone to problems such as slow cooling in the low temperature zone (insufficient flow) or excessive cooling in the high temperature zone (excessive flow), resulting in high compressor energy consumption and low temperature control accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a high and low temperature impact test chamber to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high and low temperature impact test chamber, comprising:

[0008] An impact test chamber is provided, with a door installed on the front and a manhole on the door. The interior of the impact test chamber is divided into upper and lower sections. The upper section is a high-temperature test zone, and the lower section is a low-temperature test zone. There is a slot in the center of the low-temperature test zone and the high-temperature test zone. A test basket is placed in the slot. The test basket is connected to a lifting assembly at the rear of the impact test chamber to move the test basket up and down between the high-temperature test zone and the low-temperature test zone.

[0009] The high-temperature test zone and the low-temperature test zone are provided with exchange holes on their sides. The exchange holes are connected to the temperature control component and are used to control the temperature of the high-temperature test zone and the low-temperature test zone.

[0010] Preferably, the temperature control assembly includes a condenser and a heating element. The heating element is fixedly connected to the rear end of the high-temperature test zone. The inlet of the condenser is connected to the compressor pipeline, and the outlet is connected to the main inlet pipeline of the diversion valve. The first branch of the diversion valve is threadedly connected to the first capillary joint of the first capillary tube, and the outlet of the first capillary tube is connected to the inlet of the evaporator in the high-temperature zone.

[0011] Preferably, the second branch of the diversion valve is threadedly connected to the second capillary connector of the second capillary tube, and the outlet of the second capillary tube is connected to the inlet of the low-temperature zone evaporator.

[0012] Preferably, the lifting assembly includes a drive motor, the output end of which is connected to the bottom end of a lead screw via a coupling, and the top and bottom of the lead screw are rotatably connected to a fixed seat, which is fixedly connected to the rear end of the impact test chamber.

[0013] Preferably, a movable plate is threaded onto the lead screw, and a second guide rod is fixedly connected between the upper fixed seat and the lower fixed seat, the second guide rod passing through the movable plate.

[0014] Preferably, a steel wire rope is fixedly connected to the front end of the movable plate. The steel wire rope passes through the first fixed pulley and the second fixed pulley, and then passes through the top of the high-temperature test area and is fixedly connected to the upper surface of the test basket.

[0015] Preferably, the upper and lower surfaces of the test basket are fixedly connected to limiting edges, the front of the test basket has an inlet, and the side of the test basket has a side opening.

[0016] Preferably, the inner wall of the test basket has a through hole, which is fitted onto the outside of the first guide rod.

[0017] Preferably, the top end of the first guide rod is fixedly connected to the lower top surface of the high-temperature test zone, and the bottom end of the first guide rod is fixedly connected to the upper bottom surface of the low-temperature test zone.

[0018] Preferably, the impact test chamber has a control panel on its front end and a heat dissipation vent on its side.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This invention, by setting a first capillary tube and a second capillary tube, and cooperating with a flow divider valve, can accurately allocate the refrigerant flow according to the refrigeration requirements of the high and low temperature test zones. This satisfies the forced cooling load in the low temperature zone, avoids excessive refrigeration in the high temperature zone, reduces ineffective refrigerant circulation, lowers compressor energy consumption, and improves the overall temperature control accuracy and energy efficiency.

[0021] This invention, by setting up a lifting assembly consisting of a drive motor, coupling, lead screw, second guide rod, and movable plate, compared with the cylinder drive in the prior art, utilizes the screw thread and guide rod to reduce the shaking and position deviation during the lifting of the test basket, reduce the interference of the test piece caused by the shaking of the test basket, improve the uniformity of temperature shock and the reliability of test results, and at the same time extend the service life of the test basket.

[0022] This invention, by opening a side opening on the side of the test basket and using the stabilizing guiding effect of the first guide rod, increases the loading and unloading of test samples and improves heat exchange efficiency compared to the prior art. At the same time, it reduces the risk of test samples falling due to shaking, thereby improving the efficiency and safety of the test operation. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the internal structure of this utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0025] Figure 3 This is a three-dimensional schematic diagram of the test basket of this utility model;

[0026] Figure 4 This is a side view of the test basket and lifting assembly of this utility model;

[0027] Figure 5 This is a front view of the temperature control component of this utility model;

[0028] Figure 6 This is a schematic diagram showing the connections of the various components of the temperature control assembly of this utility model;

[0029] Figure 7 This is a schematic diagram of the temperature control process in the high-temperature test zone of this utility model;

[0030] Figure 8 This is a schematic diagram of the temperature control process in the low-temperature test area of ​​this utility model.

[0031] In the diagram: 1. Impact test chamber; 101. Control panel; 102. Heat dissipation vent; 2. Chamber door; 201. Manhole; 3. High temperature test zone; 4. Low temperature test zone; 5. Heating element; 6. Test basket; 601. Steel wire rope; 602. Inlet; 603. Side opening; 604. First fixed pulley; 605. Second fixed pulley; 606. Limiting edge; 607. Fixed seat; 608. Movable plate; 609. Lead screw; 610. Second guide rod; 611. Coupling; 612. Drive motor; 7. First guide rod; 8. Exchange hole; 9. Condenser; 10. Diverter valve; 11. First capillary tube; 1101. First capillary connector; 1102. High temperature zone evaporator; 12. Second capillary tube; 1201. Second capillary connector; 1202. Low temperature zone evaporator. 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] Example 1:

[0034] Please see Figure 1 and Figures 5 to 8 This utility model provides a technical solution:

[0035] A high and low temperature impact test chamber for high and low temperature impact testing, comprising:

[0036] An impact test chamber 1 is provided, with a door 2 installed on the front of the chamber 1. A manhole 201 is provided on the door 2. The interior of the impact test chamber 1 is divided into upper and lower areas. The upper area is a high-temperature test zone 3, and the lower area is a low-temperature test zone 4. The center of the low-temperature test zone 4 and the high-temperature test zone 3 has a slot. A test basket 6 is provided in the slot. The test basket 6 is connected to a lifting assembly at the rear of the impact test chamber 1, which is used to move the test basket 6 up and down between the high-temperature test zone 3 and the low-temperature test zone 4.

[0037] The high-temperature test zone 3 and the low-temperature test zone 4 are provided with exchange holes 8 on their sides. The exchange holes 8 are connected to the temperature control component and are used to control the temperature of the high-temperature test zone 3 and the low-temperature test zone 4.

[0038] In this embodiment, the heating function of the high-temperature test zone 3 is achieved by a heating element 5 fixedly installed at the rear end. The heating element 5 is electrically connected to the control system of the impact test chamber 1 through a wire and is controlled in real time by the PLC control system. When a high-temperature test is required, when the temperature sensor (not shown in the figure) in the high-temperature test zone 3 detects that the actual temperature is lower than the set target value, the control system outputs an electrical signal to increase the working power of the heating element 5 and accelerate the heat release. When the temperature approaches the target value, the system will control the heating element 5 to gradually reduce the power to maintain stability and regulate the temperature of the high-temperature test zone 3.

[0039] Both the high-temperature test zone 3 and the low-temperature test zone 4 have independent exchange holes 8 on their sides. The exchange hole 8 in the high-temperature test zone 3 is activated when the temperature in the zone exceeds the set target value. At this time, the high-temperature zone evaporator 1102 absorbs excess heat through the hole, and achieves precise temperature control in conjunction with the power adjustment of the heating element 5. The exchange hole 8 in the low-temperature test zone 4 serves as a heat exchange channel between the refrigeration cycle and the environment in the zone. The low-temperature zone evaporator 1202 continuously removes heat from the zone through the hole to ensure a stable low-temperature environment.

[0040] Specifically, such as Figure 5 The temperature control assembly includes a condenser 9 and a heating element 5. The heating element 5 is fixedly connected to the rear end of the high-temperature test zone 3. The inlet of the condenser 9 is connected to the compressor pipeline, and the outlet is connected to the main inlet pipeline of the diversion valve 10. The first branch of the diversion valve 10 is threadedly connected to the first capillary joint 1101 of the first capillary tube 11. The outlet of the first capillary tube 11 is connected to the inlet of the high-temperature zone evaporator 1102.

[0041] Specifically, the second branch of the diversion valve 10 is threadedly connected to the second capillary connector 1201 of the second capillary tube 12, and the outlet of the second capillary tube 12 is connected to the inlet of the low-temperature zone evaporator 1202.

[0042] Specifically, the second capillary 12 is preferably of the coarse-diameter short-pitch type, with a larger inner diameter and shorter length than the first capillary 11, while the first capillary 11 is preferably of the fine-diameter long-pitch type, with a smaller inner diameter and longer length.

[0043] Because the cooling requirements of the high and low temperature test zones 4 differ, the low temperature test zone 4 needs to quickly establish a deep low temperature environment, requiring a large flow of refrigerant to continuously input for efficient cooling. The short and thick second capillary tube 12 can reduce the throttling resistance, allowing more liquid refrigerant to quickly enter the low temperature zone evaporator 1202, thus meeting the forced cooling load of the low temperature test zone 4. On the other hand, the high temperature test zone 3 only needs to perform auxiliary cooling regulation when the current temperature exceeds the target temperature, requiring less. The long and thin first capillary tube 11 can increase the throttling resistance, controlling a small flow of refrigerant to enter the high temperature zone evaporator 1102, avoiding excessive cooling that could interfere with the high temperature stability of the high temperature test zone 3. By setting the first capillary tube 11 and the second capillary tube 12, the reliability of rapid cooling and deep cooling in the low temperature zone can be guaranteed, while the cooling capacity in the high temperature zone can be precisely controlled. At the same time, by matching the needs of the high and low temperature zones, the ineffective circulation of refrigerant is reduced, thereby reducing compressor energy consumption and improving the overall temperature control accuracy and energy efficiency.

[0044] Specifically, the diverter valve 10 is preferably an electronic expansion valve (such as the EXV-10 model). This valve has a built-in microprocessor that receives pulse signals from the PLC and precisely controls the valve core opening (adjustment range 0-480 steps) through a stepper motor. It also combines the different sizes of the two capillary tubes to achieve different amounts of refrigerant distribution.

[0045] The control system preferably uses a Siemens S7-1200 series PLC as the main control unit. The temperature sensor (not shown in the figure), circulating fan (not shown in the figure), heating element 5, test basket 6, condenser 9, evaporator, compressor, etc. all adopt common settings and structures in existing high and low temperature impact chambers (such as PT100 platinum resistance temperature sensor, axial flow circulating fan, nickel-chromium alloy heating wire, basket-type impact chamber lifting structure, etc.). Their specific models and installation methods have been disclosed in detail in existing technologies and will not be repeated here.

[0046] When high-temperature test zone 3 is running, the operator first sets the target temperature (e.g., 150℃), and then the temperature sensor (not shown in the figure) continuously monitors the current temperature. Based on the monitoring results, there are three operating scenarios:

[0047] Heating phase: If the current temperature is lower than the target temperature, the control system sends a power increase signal to the heating element 5, the heating element 5 heats up, and the circulating fan (not shown in the figure) forces air convection, and the high temperature zone heats up rapidly.

[0048] Stabilization phase: If the current temperature is close to the target temperature (fluctuation within ±1℃), the control system sends a power reduction signal to the heating element 5. The heating element 5 then uses low power to supplement the heat and maintain the temperature stable at the target value (fluctuation within ±0.5℃), waiting for the test sample to be moved in or the area to be switched.

[0049] Cooling phase: If the current temperature is higher than the target temperature, the control system starts the high-temperature zone evaporator 1102, and the first capillary tube 11 delivers a small amount of refrigerant. The evaporator evaporates and absorbs heat, quickly cooling down to the target value, while simultaneously reducing the heating power.

[0050] When operating in low-temperature test zone 4, the operator also needs to set the target temperature (e.g., -50℃). Subsequently, the temperature sensor (not shown in the figure) continuously monitors the current temperature, and there are three operating scenarios based on the monitoring results:

[0051] Cooling stage: When the current temperature is higher than the target temperature, the control system starts the compressor and condenser 9. The high-pressure liquid refrigerant is throttled through the second capillary tube 12 and enters the low-temperature zone evaporator 1202. The refrigerant evaporates and absorbs heat. The circulating fan forces air convection, and the low-temperature test zone 4 cools down.

[0052] Stable phase: The current temperature is close to the target temperature (±1℃). The control system adjusts the compressor power and reduces the refrigerant flow. The low-temperature evaporator 1202 continues to absorb a small amount of heat to maintain the temperature stable at the target value, waiting for the test sample to be moved in or the switching command to be given.

[0053] Recovery phase: When the current temperature is lower than the target temperature (overshoot), the control system reduces the compressor power and the refrigerant flow in the second capillary tube 12 to suppress excessive cooling and allow the temperature to rise and stabilize within the target range.

[0054] Example 2:

[0055] Please see Figures 1 to 4 This utility model provides a technical solution:

[0056] An impact test chamber 1 is provided, with a door 2 installed on the front of the chamber 1. A manhole 201 is provided on the door 2. The interior of the impact test chamber 1 is divided into upper and lower areas. The upper area is a high-temperature test zone 3, and the lower area is a low-temperature test zone 4. The center of the low-temperature test zone 4 and the high-temperature test zone 3 has a slot. A test basket 6 is provided in the slot. The test basket 6 is connected to a lifting assembly at the rear of the impact test chamber 1, which is used to move the test basket 6 up and down between the high-temperature test zone 3 and the low-temperature test zone 4.

[0057] The high-temperature test zone 3 and the low-temperature test zone 4 are provided with exchange holes 8 on their sides. The exchange holes 8 are connected to the temperature control component and are used to control the temperature of the high-temperature test zone 3 and the low-temperature test zone 4.

[0058] Specifically, the lifting assembly includes a drive motor 612, the output end of which is connected to the bottom end of a lead screw 609 via a coupling 611. The top and bottom of the lead screw 609 are rotatably connected within a fixed base 607, which is fixedly connected to the rear end of the impact test chamber 1.

[0059] In this embodiment, the drive motor 612, coupling 611 and lead screw 609 are used to drive the movable plate 608 to rise and fall. In the prior art, cylinders are often used to drive the movable block to rise and fall, which drives the steel wire rope 601 and the test basket 6 to move in the high temperature test zone 3 and low temperature test zone in the impact test chamber 1 for testing. The cylinder drive depends on air pressure and is easily affected by the stability of the air source. Pressure fluctuations will cause deviations in the lifting speed and position of the test basket 6. Shaking is easy to occur during the lifting process, which affects the uniformity of temperature impact and the accuracy of test results. In addition, frequent shaking will generate additional stress on the connection structure between the specimen and the test basket 6. Long-term testing may accelerate the damage of the test basket 6.

[0060] The drive motor 612 and the lead screw 609 work together to achieve the lifting and lowering of the movable plate 608 through precision thread transmission. The threaded engagement between the lead screw 609 and the movable plate 608 has self-locking properties and can be stably locked in any position. Two second guide rods 610 are provided between the upper and lower fixed seats 607. The guide rods pass through the movable plate 608 and slide with the movable plate 608 to prevent the movable plate 608 from tilting or shaking due to unilateral force, so as to keep the movable plate 608 stable during the lifting and lowering process, thereby reducing the shaking amplitude of the test basket 6.

[0061] Specifically, a movable plate 608 is threaded onto the lead screw 609, and a second guide rod 610 is fixedly connected between the upper fixed seat 607 and the lower fixed seat 607, with the second guide rod 610 passing through the movable plate 608.

[0062] Specifically, a steel wire rope 601 is fixedly connected to the front end of the movable plate 608. The steel wire rope 601 passes through the first fixed pulley 604 and the second fixed pulley 605 and then passes through the top of the high temperature test area 3 and is fixedly connected to the upper surface of the test basket 6.

[0063] Specifically, the upper and lower surfaces of the test basket 6 are both fixedly connected to limiting edges 606. The front of the test basket 6 has an inlet 602, and the side of the test basket 6 has a side opening 603. The inlet 602 is used to put in the test sample. Compared with the multiple through holes in the prior art, the side opening 603 has a larger opening area and higher testing efficiency. Due to the setting of the first guide rod 7, the test basket 6 has a small swaying amplitude, so there is no need to worry about the test sample falling out of the test basket 6.

[0064] In this embodiment, when the movable plate 608 moves up and down along the second guide rod 610 under the drive of the lead screw 609, the steel wire rope 601 at the front end converts the lifting motion of the movable plate 608 into the vertical lifting motion of the test basket 6 inside the impact test chamber 1 through the steering transmission of the first fixed pulley 604 and the second fixed pulley 605, thereby realizing the switching of the test basket 6 between the high temperature test zone 3 and the low temperature test zone 4. The limiting edge 606 at the upper and lower ends of the test basket 6 is designed to adapt to the opening size between the two zones. When the test basket 6 is located in the high temperature test zone 3, the limiting edge 606 is in close contact with the edge of the opening of the high temperature zone, which can block the heat exchange between the two zones and prevent the test basket 6 from being laterally misaligned due to the lifting inertia.

[0065] Specifically, a through hole is provided on the inner wall of the test basket 6, and the through hole is sleeved on the outside of the first guide rod 7.

[0066] Specifically, the top end of the first guide rod 7 is fixedly connected to the lower top surface of the high temperature test zone 3, and the bottom end of the first guide rod 7 is fixedly connected to the upper bottom surface of the low temperature test zone 4.

[0067] like Figure 3 Each of the four corners of the test basket 6 is equipped with a first guide rod 7. When the test basket 6 moves under the traction of the wire rope 601, the through hole slides along the first guide rod 7, providing guidance for the lifting and lowering of the test basket 6, enhancing stability, reducing the swaying amplitude of the test basket 6, and improving the reliability of the test.

[0068] Specifically, the inner walls of the high-temperature and low-temperature testing zones are preferably made of a composite material of aluminum silicate fiberboard and 304 stainless steel. Among them, the aluminum silicate fiberboard, as the core heat insulation layer, has excellent high-temperature resistance (long-term operating temperature can reach above 1000℃) and low thermal conductivity ≤0.12W / (m·K), which can effectively block heat exchange between the high-temperature zone and the outside environment and the low-temperature zone, reducing heat loss. The outer 304 stainless steel plate has good corrosion resistance and mechanical strength, and can resist material fatigue under alternating high and low temperature impacts.

[0069] Specifically, the first guide rod 7 is preferably made of 304 stainless steel optical shaft.

[0070] Specifically, the impact test chamber 1 has a control panel 101 on its front end and a heat dissipation vent 102 on its side.

[0071] The control panel 101 integrates a touch screen and physical buttons, allowing operators to set parameters such as the target temperature of the high-temperature zone, the target temperature of the low-temperature zone, the number of impact cycles, and the dwell time for automatic testing. At the same time, it displays the current temperature of each zone, the equipment operating status, and fault alarm information in real time, enabling full-process visual control of the testing process.

[0072] The two heat dissipation vents 102 correspond to the installation positions of the heating element 5 in the high-temperature zone and the refrigeration system in the low-temperature zone, respectively. In addition to heat dissipation, the heat dissipation vent 102 in the high-temperature zone can also be used to dissipate excess heat generated by the heating element 5 during operation. The heat dissipation vent 102 preferably has a detachable grille design, which can be opened directly during daily maintenance to facilitate the inspection, cleaning or replacement of internal heating pipes, compressor pipes, fans and other components.

[0073] In use, the operator first places the test sample into the test basket 6 through the inlet 602 of the door 2. After closing the door 2, the operator sets the target temperature of the high-temperature zone and the low-temperature zone, as well as the number of impact cycles and the dwell time through the control panel 101. After starting the equipment, the lifting component drives the test basket 6 to first enter the high-temperature test zone 3 and test according to the high-temperature zone workflow. After reaching the preset dwell time, the equipment quickly switches to the low-temperature test zone 4 and tests according to the low-temperature zone workflow. This cycle continues until the set number of impact tests is completed. During this process, the control panel 101 displays the operating status in real time. After the test is completed, the equipment indicates completion, and the operator can open the door 2 to remove the test sample.

[0074] All other parts of this utility model not described herein are the same as existing technologies, or are known technologies, or can be implemented using existing technologies, and will not be described in detail here.

[0075] 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 impact test chamber, characterized in that, include: Impact test chamber (1), the front of the impact test chamber (1) is equipped with a door (2), the door (2) is provided with a manhole (201), the interior of the impact test chamber (1) is divided into upper and lower areas, the upper area is a high temperature test area (3) and the lower area is a low temperature test area (4), the center of the low temperature test area (4) and the high temperature test area (3) has a slot, the slot is provided with a test basket (6), the test basket (6) is connected to the lifting component at the rear of the impact test chamber (1) and is used to drive the test basket (6) to move up and down between the high temperature test area (3) and the low temperature test area (4); The high-temperature test zone (3) and the low-temperature test zone (4) are provided with exchange holes (8) on their sides. The exchange holes (8) are connected to the temperature control component and are used to control the temperature of the high-temperature test zone (3) and the low-temperature test zone (4).

2. The high and low temperature impact test chamber according to claim 1, characterized in that: The temperature control assembly includes a condenser (9) and a heating element (5). The heating element (5) is fixedly connected to the rear end of the high-temperature test zone (3). The inlet of the condenser (9) is connected to the compressor pipeline, and the outlet is connected to the main inlet pipeline of the diversion valve (10). The first branch of the diversion valve (10) is threadedly connected to the first capillary joint (1101) of the first capillary tube (11). The outlet of the first capillary tube (11) is connected to the inlet of the high-temperature zone evaporator (1102).

3. A high and low temperature impact test chamber according to claim 2, characterized in that: The second branch of the diversion valve (10) is threadedly connected to the second capillary connector (1201) of the second capillary tube (12), and the outlet of the second capillary tube (12) is connected to the inlet of the low-temperature zone evaporator (1202).

4. The high and low temperature impact test chamber according to claim 1, characterized in that: The lifting assembly includes a drive motor (612), the output end of which is connected to the bottom end of a lead screw (609) via a coupling (611). The top and bottom of the lead screw (609) are rotatably connected in a fixed seat (607), which is fixedly connected to the rear end of the impact test chamber (1).

5. A high and low temperature impact test chamber according to claim 4, characterized in that: A movable plate (608) is threaded onto the lead screw (609), and a second guide rod (610) is fixedly connected between the upper fixed seat (607) and the lower fixed seat (607), with the second guide rod (610) passing through the movable plate (608).

6. A high and low temperature impact test chamber according to claim 5, characterized in that: The front end of the movable plate (608) is fixedly connected to a steel wire rope (601). The steel wire rope (601) passes through the first fixed pulley (604) and the second fixed pulley (605) and then passes through the top of the high temperature test area (3) and is fixedly connected to the upper surface of the test basket (6).

7. A high and low temperature impact test chamber according to claim 6, characterized in that: The upper and lower surfaces of the test basket (6) are fixedly connected with limiting edges (606), the front of the test basket (6) is provided with an inlet (602), and the side of the test basket (6) is provided with a side opening (603).

8. A high and low temperature impact test chamber according to claim 6, characterized in that: The inner wall of the test basket (6) is provided with a through hole, which is sleeved on the outside of the first guide rod (7).

9. A high and low temperature impact test chamber according to claim 8, characterized in that: The top end of the first guide rod (7) is fixedly connected to the lower top surface of the high temperature test zone (3), and the bottom end of the first guide rod (7) is fixedly connected to the upper bottom surface of the low temperature test zone (4).

10. A high and low temperature impact test chamber according to claim 1, characterized in that: The impact test chamber (1) has a control panel (101) on its front end and a heat dissipation vent (102) on its side.

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