Electric compressor high-humidity environment endurance test device and test method

Abstract

The invention discloses an electric compressor high-humidity environment endurance test device, which comprises a mounting frame, a test box arranged at the top of the mounting frame, a test cavity arranged in the test box, a plurality of humidity sensors arranged in the test cavity, a sealing cabin door arranged at the front end of the test cavity in the test box, and an assembly seat arranged at the bottom of the inner side of the test cavity, limiting frames are installed on the two sides of the top of the assembly base, a driving motor is installed in the installation frame, the power output end of the driving motor is connected with a transmission assembly, the power output end of the transmission assembly is arranged in the test cavity, a spraying assembly is installed on the top of the test cavity, the input end of the spraying assembly is connected with a water storage tank, and the water storage tank is installed on the installation frame. An air circulation mechanism is mounted at the top of the test box, and the output end of the air circulation mechanism is arranged at the top of the test cavity.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field, and particularly relates to a high-humidity environment durability test device and test method for an electric compressor. BACKGROUND

[0002] As a core component of a new energy vehicle air conditioning system and a heat pump system, the electric compressor has a complex and diverse working environment. The durability of the electric compressor in a high-temperature and high-humidity environment, a coastal salt spray and high-humidity environment and the like directly affects the operation reliability of the vehicle. The high-humidity environment can cause the insulation performance of the winding inside the electric compressor to decrease, metal components to corrode and the wear of the moving pair to intensify. Therefore, the high-humidity environment durability test is a key link in the research and development and quality detection of the electric compressor.

[0003] The existing high-humidity environment durability test device for the electric compressor has poor humidity uniformity. The device usually uses a single atomizing nozzle or a humidifier directly connected to the test cabin to introduce moisture into the test cabin, which causes the humidity in different areas of the cabin to greatly differ, cannot truly simulate the overall wet environment of the electric compressor, and has low test result accuracy. In addition, condensate water is easily generated on the inner wall of the cabin and the surface of the electric compressor in the high-humidity environment, which can cause the condensate water to accumulate at the bottom of the compressor, intensify local corrosion, and interfere with the test process. Moreover, the existing test device cannot maintain the operating state of the electric compressor during the durability test, which further reduces the test result of the durability test. SUMMARY

[0004] In view of the problems in the above background art, the application aims to provide a high-humidity environment durability test device and test method for an electric compressor.

[0005] To achieve the above technical purpose, the application adopts the following technical scheme: A high-humidity environment durability test device for an electric compressor, comprising a mounting frame, a test box mounted on the top of the mounting frame, a test cavity provided in the test box, a plurality of humidity sensors mounted in the test cavity, a sealed cabin door provided at the front end of the test cavity, an assembly seat mounted on the inner bottom of the test cavity, a limiting frame mounted on the top of the assembly seat, a driving motor mounted in the mounting frame, a transmission assembly connected to the power output end of the driving motor, the power output end of the transmission assembly being arranged in the test cavity, a spraying assembly mounted on the top of the test cavity, a water storage tank connected to the input end of the spraying assembly, the water storage tank being mounted on the mounting frame, an air circulation mechanism mounted on the top of the test box, and the output end of the air circulation mechanism being arranged on the top of the test cavity.

[0006] Further limited, the test chamber includes a corrosion-resistant stainless steel inner layer and a galvanized outer layer, and the corrosion-resistant stainless steel inner layer and the galvanized outer layer are filled with a polyurethane insulation layer. Such structural design plays a role in preventing corrosion and rust, and also has the effect of heat preservation.

[0007] Further limited, the sealing cabin door is provided with a double-layer sealing gasket at the connection with the test chamber, a tempered glass observation window is installed at the center of the sealing cabin door, and a handle is installed on the other side of the sealing cabin door. Such structural design facilitates opening and closing, while improving the sealing performance.

[0008] Further limited, the assembly seat is provided with a plurality of guide grooves, the guide grooves are evenly arranged in a radial manner on the assembly seat, the depth of the guide grooves gradually increases from the center to the edge, a liquid collecting cavity is formed between the outer side of the assembly seat and the test chamber, a drain pipe is installed on one side of the bottom of the liquid collecting cavity, and a drain pump is connected to the input end of the drain pipe. Such structural design prevents the accumulation of condensed water.

[0009] Further limited, the transmission assembly includes a first transmission wheel installed at the power output end of the drive motor, a transmission belt connected to the first transmission wheel, a second transmission wheel connected to the other side of the transmission belt, a transmission main shaft connected to the second transmission wheel, the transmission main shaft extending into the test chamber through the test chamber, a coupling connected to the output end of the transmission main shaft, a magnetic fluid sealing seat installed on the test chamber at the position where the transmission main shaft penetrates, the transmission main shaft and the inner ring of the magnetic fluid sealing seat are gap fitted, the gap is filled with magnetic fluid sealing medium, and a dustproof and waterproof cover is provided on the outer side of the transmission assembly, and the dustproof and waterproof cover is fixedly connected with the side wall of the test chamber. Such structural design facilitates the operation of the drive motor compressor and the durability test.

[0010] Further limited, the spraying assembly includes an annular main pipe arranged on the upper side of the test chamber, a fixing frame installed on the top of the annular main pipe, the fixing frame being installed on the top of the test chamber, and a plurality of nozzles being uniformly installed on the bottom of the annular main pipe. Such structural design facilitates the output of water mist to simulate a high-humidity environment.

[0011] Further limited, an ultrasonic atomizer is installed on the inner bottom of the water storage tank, a mist outlet is provided on the top of the water storage tank, a mist guide pipe is connected to the output end of the mist outlet, the output end of the mist guide pipe is communicated with the annular main pipe, a conveying fan is installed on the input end of the mist outlet of the water storage tank, and a water replenishment pipe is installed on one side of the top of the water storage tank. Such structural design facilitates the generation and transportation of water mist.

[0012] Further limited, the air circulation mechanism comprises a fan, a filter screen is installed at the input end of the fan, a conveying box is connected to the output end of the fan, the conveying box is installed on the top of the test box, a shunt main pipe is connected to the output end of the conveying box, the shunt main pipe penetrates through the top of the test box and extends to the inside thereof and is connected with a plurality of shunt branch pipes, a ring-shaped air pipe is connected to the output end of the shunt branch pipes, the ring-shaped air pipe is arranged inside the ring-shaped main pipe, a plurality of evenly arranged air outlets are arranged at the bottom of the ring-shaped air pipe, and the axis of the air outlets is arranged at an angle of 35° with the inner side wall of the test cavity. Such a structure design facilitates the driving of water mist to realize uniform distribution of humidity in each area.

[0013] Further limited, one side of the test box is provided with a return pipeline, the input end of the return pipeline is connected with a suction hood, the suction hood is arranged in the test cavity, a waterproof filter screen is installed in the suction hood, the output end of the return pipeline is in communication with the conveying box, and a plurality of electric heating pipes are installed on both sides of the inside of the conveying box. Such a structure design can also achieve the effect of recycling and can further simulate a high-temperature and high-humidity environment.

[0014] A test method of an electric compressor high-humidity environment durability test device, characterized in that the test method comprises the following steps: S1: open the sealed cabin door, place the electric compressor to be tested on the assembly seat at the bottom of the inside of the test cavity, adjust the position of the compressor, make the two side limiting frames abut against the side walls of the compressor, realize stable limiting of the compressor, connect the transmission main shaft of the transmission assembly with the input end of the electric compressor through a shaft coupling, then close the sealed cabin door, make the double-layer sealing gaskets closely abut against the test box, and ensure that the test cavity forms a completely sealed environment to avoid external air from entering and interfering with the test conditions; S2: start the driving motor in the mounting frame, the driving motor drives the transmission main shaft to rotate in the magnetic fluid sealing seat through a first transmission wheel, a transmission belt and a second transmission wheel, and then drives the electric compressor to start and maintain a rated operating state through a shaft coupling; S3: start the ultrasonic atomizer in the water storage tank and the conveying fan at the mist outlet, the ultrasonic atomizer splits water into fine mist through cavitation effect, the conveying fan accelerates the water mist to be conveyed along the mist guide pipe to the ring-shaped main pipe, the water mist is sprayed to the whole test cavity through the evenly distributed nozzles at the bottom of the ring-shaped main pipe, and a high-humidity environment is initially constructed; S4: start the fan at the top of the test box, external air is filtered through the filter screen at the input end of the fan and then enters the conveying box, is buffered and stabilized, is distributed to the ring-shaped air pipe through the shunt main pipe and the shunt branch pipes, and is finally sprayed out from the air outlets at an angle of 35° with the inner side wall of the test cavity, the airflow forms a rotational flow effect, the water mist is spirally circulated and diffused in the test cavity, the humidity in each area of the cavity is ensured to be uniform, and meanwhile, the humidity sensor monitors the humidity data in the cavity in real time and feeds back the data to an external terminal. S5: During the test, the condensate generated on the inner wall of the test cavity and the surface of the electric compressor flows down along the cavity wall, falls into the radial flow guide groove of the assembly seat, and flows quickly into the liquid collection cavity under the guidance of the depth gradient of the flow guide groove, when the liquid level of the condensate in the liquid collection cavity reaches the preset threshold, the drainage pump is started, and the condensate is discharged from the equipment through the drain pipe to avoid the accumulation of condensate at the bottom of the electric compressor; S6: After the test is completed, the ultrasonic atomizer, the conveying fan and the driving motor are turned off, the sealed cabin door is opened, the coupling is disconnected with the electric compressor, and the tested electric compressor is taken out.

[0015] The beneficial effects of the present application are: 1、The present application is provided with a spraying assembly and a water storage tank, the spraying assembly forms a spraying area with no dead angle and full coverage through the cooperation of the annular main pipe and the several nozzles uniformly arranged at the bottom, ensuring that the spraying medium conveying path covers the whole test cavity, the ultrasonic atomizer in the water storage tank can generate water mist, the conveying fan matched with the mist outlet accelerates the accurate delivery of the water mist to the annular main pipe, reduces the condensation loss and deposition of the water mist, guarantees the uniformity of atomization, and synchronously matches the air circulation mechanism to uniformly distribute the airflow to the annular air pipe, and the annular air pipe and the annular main pipe form a coaxial annular layout, so that the airflow path and the water mist spraying path are highly matched, and the outlet and the inner side wall of the test cavity are arranged at an angle of 35°, forming a cyclone effect to drive the water mist to spiral and diffuse, completely breaking the humidity stratification, avoiding local humidity differences, so that each area in the test cavity is in a high-humidity environment, greatly improving the accuracy and reliability of the test results.

[0016] 2、The present application is provided with a radial flow guide groove uniformly distributed on the assembly seat, and the depth of the flow guide groove gradually increases from the center to the edge, which can quickly guide the condensate to the liquid collection cavity between the assembly seat and the test cavity, and then discharge it in time through the drainage pump, avoiding the accumulation of condensate at the bottom of the electric compressor.

[0017] 3、The present application establishes a power connection between the transmission assembly and the electric compressor in the test cavity, and the magnetic fluid sealing seat is used to seal the transmission main shaft penetrating the test box, the magnetic fluid sealing medium fills the gap, has excellent sealing performance and high-speed rotation adaptability, can effectively prevent the leakage of high-humidity gas in the test cavity and the entry of dry air from the outside, and the limiting frame on both sides of the assembly seat stably limits the electric compressor, ensuring that the compressor can stably operate in a high-humidity test environment, so that the test can be carried out under the real operating condition of the electric compressor, and the test result can accurately reflect the durability of the electric compressor in a high-humidity environment. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application can be further illustrated by the non-limiting embodiments shown in the accompanying drawings; Figure 1This is a schematic diagram of the axial side structure of an electric compressor high humidity environment durability testing device according to an embodiment of the present invention; Figure 2 This is a cross-sectional structural diagram of a high-humidity environment durability testing device for an electric compressor according to an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the water storage tank of an electric compressor high humidity environment durability test device according to an embodiment of the present invention; Figure 4 This is an enlarged structural diagram of point A of an electric compressor high humidity environment durability testing device according to an embodiment of the present invention; The symbols for the main components are explained below: Mounting frame 1, Test chamber 2, Test cavity 3, Humidity sensor 301, Sealed door 4, Assembly base 5, Limiting frame 6, Drive motor 7, Transmission assembly 8, Spray assembly 9, Water storage tank 10, Air circulation mechanism 11, Corrosion-resistant stainless steel inner layer 12, Galvanized outer layer 13, Polyurethane insulation layer 14, Double-layer sealing gasket 15, Tempered glass observation window 16, Handle 17, Flow guide trough 18, Liquid collection chamber 19, Drain pipe 20, Drain pump 21, First transmission wheel 22, Transmission Belt 23, second drive wheel 24, drive main shaft 25, coupling 26, magnetic fluid seal seat 27, dustproof and waterproof cover 28, annular main pipe 29, fixed frame 30, nozzle 31, ultrasonic atomizer 32, mist outlet 33, mist guide pipe 34, conveying fan 35, water supply pipe 36, fan 37, conveying box 38, diversion main pipe 39, diversion branch pipe 40, annular air duct 41, air outlet 42, return pipe 43, suction hood 44, waterproof filter screen 45, electric heating tube 46. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Example 1, such as Figure 1 , Figure 2 and Figure 3 As shown, an electric compressor high humidity environment durability test device includes a test chamber 2 mounted on the top of a mounting frame 1, a test cavity 3 inside the test chamber 2, several humidity sensors 301 installed inside the test cavity 3, a sealed door 4 at the front end of the test cavity 3, an assembly seat 5 mounted on the bottom inside the test cavity 3, limit brackets 6 mounted on both sides of the top of the assembly seat 5, a drive motor 7 mounted inside the mounting frame 1, a transmission assembly 8 connected to the power output end of the drive motor 7, the power output end of the transmission assembly 8 being located inside the test cavity 3, a spray assembly 9 mounted on the top of the test cavity 3, a water storage tank 10 connected to the input end of the spray assembly 9 being mounted on the mounting frame 1, and an air circulation mechanism 11 mounted on the top of the test chamber 2, the output end of the air circulation mechanism 11 being located on the top of the test cavity 3.

[0021] In this embodiment, during use, the electric compressor requiring high humidity environment durability testing is placed on the mounting base 5 and installed between the two side limit frames 6. The limit frames 6 limit the electric compressor. After the electric compressor is installed and fixed, the power output end of the transmission component 8 is connected to the input end of the electric compressor. Then, the sealed door 4 is closed, so that the test chamber 3 is under sealed control, and the test can be carried out. During the test, the drive motor 7 drives the transmission component 8, which drives the electric compressor to work, so that the electric compressor is in operation. At the same time, the water tank 10 and the spray component 9 work together to achieve uniform spraying of moisture. During the spraying of moisture by the spray component 9, the humidity sensor 301 in the test chamber 3 monitors the internal humidity in real time and sends the humidity information to the external terminal for the operator to view. At the same time, the air circulation mechanism 11 is activated, which drives the moisture to flow in the test chamber 3, ensuring that the temperature and humidity in each area of ​​the test chamber 3 are consistent, which greatly improves the uniformity of the test environment and the accuracy of the test results.

[0022] Example 2, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure to the embodiment 1: the test chamber 2 includes a corrosion-resistant stainless steel inner layer 12 and a galvanized outer layer 13, and a polyurethane insulation layer 14 is filled between the corrosion-resistant stainless steel inner layer 12 and the galvanized outer layer 13.

[0023] In this embodiment, during use, the corrosion-resistant stainless steel inner layer 12 prevents the inner layer from rusting and being damaged, while the galvanized outer layer 13 forms a dense protective film on the surface of the test chamber 2, isolating air and moisture and providing excellent atmospheric corrosion protection, preventing the outer shell of the test chamber 2 from rusting and deforming, and extending its service life. The polyurethane insulation layer 14 can effectively block the heat exchange between the inside of the test chamber and the outside, which can significantly reduce energy consumption, stabilize the temperature inside the test chamber 2, and prevent external temperature fluctuations from interfering with the test conditions.

[0024] Example 3, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: a double-layer sealing gasket 15 is provided at the connection between the sealed door 4 and the test chamber 2; a tempered glass observation window 16 is installed in the center of the sealed door 4; one side of the sealed door 4 is hinged to the test chamber 2; and a handle 17 is installed on the other side of the sealed door 4.

[0025] In this embodiment, after the sealed door 4 is closed, the double-layer sealing gasket 15 can form a double sealing barrier, which greatly improves the sealing performance at the connection between the sealed door 4 and the test chamber 2, effectively blocking the exchange of gas, moisture and heat between the inside and outside of the chamber, avoiding interference from the external environment with the test conditions inside the test chamber 2, and ensuring the accuracy of the test data. The tempered glass observation window 16 is made of high-strength material, impact-resistant and resistant to temperature changes, and is suitable for the complex working environment of the test chamber 2. It is not easy to break due to collision or temperature fluctuation inside the chamber. Through the tempered glass observation window 16, the sample status or test progress inside the test chamber 2 can be observed in real time without opening the sealed door 4. At the same time, the hinged connection allows the sealed door 4 to rotate flexibly around the hinge axis, making the opening and closing operation effortless and smooth. The handle 17 provides a stable force point for opening and closing the sealed door 4.

[0026] Example 4, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the assembly base 5 is provided with a plurality of guide grooves 18, which are radially and uniformly arranged on the assembly base 5. The depth of the guide grooves 18 gradually increases from the center to the edge. A liquid collection chamber 19 is formed between the outer side of the assembly base 5 and the test chamber 3. A drain pipe 20 is installed on one side of the bottom of the liquid collection chamber 19, and a drain pump 21 is connected to the input end of the drain pipe 20.

[0027] In this embodiment, during use, the condensate generated in the test chamber 3 can be quickly guided to the collection chamber 19 by the radially arranged guide channel 18 and the liquid collection chamber 19, and then discharged by the drain pump 21, which avoids the accumulation of condensate at the bottom of the electric compressor and reduces the interference of condensate on the test.

[0028] A water level sensor can also be installed on the side wall of the liquid collection chamber 19. The water level sensor can be set to monitor the condensate level in real time to ensure timely drainage.

[0029] Example 5, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the transmission assembly 8 includes a first transmission wheel 22 installed at the power output end of the drive motor 7, the first transmission wheel 22 is connected to a transmission belt 23, the other side of the transmission belt 23 is connected to a second transmission wheel 24, the second transmission wheel 24 is connected to a transmission main shaft 25, one side of the transmission main shaft 25 passes through the test chamber 2 and extends into the test cavity 3, the output end of the transmission main shaft 25 is connected to a coupling 26, the test chamber 2 is equipped with a magnetic fluid sealing seat 27 at the passage of the transmission main shaft 25, the transmission main shaft 25 and the inner ring of the magnetic fluid sealing seat 27 are clearance-fitted, the clearance is filled with magnetic fluid sealing medium, and a dustproof and waterproof cover 28 is provided on the outside of the transmission assembly 8, the dustproof and waterproof cover 28 is fixedly connected to the side wall of the test chamber 2.

[0030] In this embodiment, during use, the drive motor 7 drives the first transmission wheel 22 to rotate, the first transmission wheel 22 drives the transmission belt 23, the transmission belt 23 drives the second transmission wheel 24, the second transmission wheel 24 drives the transmission main shaft 25 to rotate within the magnetic fluid sealing seat 27, and the other side of the transmission main shaft 25 drives the electric compressor to operate through the coupling 26.

[0031] Among them, the magnetic fluid sealing seat 27 has the characteristics of good sealing performance, long service life and adaptability to high-speed rotation. It can effectively prevent the leakage of high humidity gas in the test chamber 3 and the entry of external dry air. At the same time, the dustproof and waterproof cover 28 further improves the sealing reliability and ensures the stability of the test environment.

[0032] Example 6, as Figure 2 , Figure 3 and Figure 4 As shown, this embodiment adds the following structure to embodiment 1: the spray assembly 9 includes an annular main pipe 29 disposed on the upper side of the test chamber 3, a fixing frame 30 is mounted on the top of the annular main pipe 29, the top of the fixing frame 30 is mounted on the top of the test chamber 3, and a plurality of nozzles 31 are evenly installed on the bottom of the annular main pipe 29. This structural design facilitates the output of water mist to simulate a high humidity environment.

[0033] In this embodiment, during use, the annular main pipe 29 surrounds the internal space of the test chamber 3, allowing the delivery path of the spray medium to cover the entire area of ​​the test chamber 3. The nozzles 31 are evenly installed at the bottom of the annular main pipe 29, enabling the spray medium to form a spray area without dead angles and with full coverage within the test chamber 3, ensuring uniform humidity distribution within the test chamber 3.

[0034] Example 7, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: an ultrasonic atomizer 32 is installed on the inner bottom of the water tank 10, a mist outlet 33 is provided on the top of the water tank 10, a mist guide pipe 34 is connected to the output end of the mist outlet 33, the output end of the mist guide pipe 34 is connected to the annular main pipe 29, a conveying fan 35 is installed at the input end of the mist outlet 33 of the water tank 10, and a water supply pipe 36 is installed on one side of the top of the water tank 10.

[0035] In this embodiment, during use, the ultrasonic atomizer 32 generates a cavitation effect on the liquid surface, instantly splitting the water into fine water mist. Combined with the conveying fan 35 at the mist outlet 33, the water mist is rapidly conveyed along the mist guide tube 34, reducing water mist condensation loss and ensuring that the water mist is delivered to the annular main tube 29. This prevents the water mist from depositing or drifting during the delivery process. The annular main tube 29 enables the water mist to achieve a spray effect without dead angles and with full coverage in the test chamber 3, ensuring uniform humidity distribution in the test chamber 3.

[0036] Example 8, as Figure 2and Figure 4 As shown, this embodiment adds the following structure based on embodiment 1: the air circulation mechanism 11 includes a fan 37, a filter screen is installed at the input end of the fan 37, and a conveyor box 38 is connected to the output end of the fan 37. The conveyor box 38 is installed on the top of the test chamber 2, and a diversion main pipe 39 is connected to the output end of the conveyor box 38. The diversion main pipe 39 passes through the top of the test chamber 2 and extends to its inner side, where several diversion branch pipes 40 are connected. The output ends of the several diversion branch pipes 40 are connected to an annular air duct 41. The annular air duct 41 is located inside the annular main pipe 29, and several evenly arranged air outlets 42 are provided at the bottom of the annular air duct 41. The axis of the several air outlets 42 is set at a 35° angle with the inner wall of the test chamber 3.

[0037] In this embodiment, during use, the fan 37 provides a stable power source for the air circulation in the test chamber 3, which can drive the airflow to flow rapidly, causing the water mist to diffuse in the chamber. The airflow is delivered into the delivery box 38, and then into the main diversion pipe 39 through the delivery box 38, and then into the branch diversion pipe 40. Finally, it flows out from the branch diversion pipe 40 into the annular air duct 41, and then out from several air outlets 42 at the bottom of the annular air duct 41. After flowing out from the air outlets 42, it causes the water mist to diffuse in the chamber. At the same time, the axis of the air outlets 42 forms a 35° angle with the inner side wall of the test chamber 3. The sprayed airflow will form a swirling effect along the side wall of the test chamber, causing the water mist to make a spiral circulation motion in the chamber, which improves the diffusion coverage of the water mist.

[0038] Among them, the annular air duct 41 is set inside the annular main pipe 29 to form a coaxial annular layout, so that the airflow path is highly matched with the water mist spraying path. The airflow can directly carry the water mist sprayed from the nozzle of the annular main pipe 29 to diffuse throughout the test chamber 3, ensuring a high humidity environment in the test chamber 3.

[0039] The hierarchical diversion structure of the main diversion pipe 39 and several branch diversion pipes 40 can evenly distribute the airflow to various areas of the annular duct 41, ensuring that the airflow is consistent throughout the annular duct 41.

[0040] Example 9, as Figure 2 As shown, this embodiment adds the following structure based on embodiment 1: a return pipe 43 is installed on one side of the test chamber 2, and a suction hood 44 is connected to the input end of the return pipe 43. The suction hood 44 is set inside the test chamber 3, and a waterproof filter screen 45 is installed inside the suction hood 44. The output end of the return pipe 43 is connected to the conveying box 38, and several electric heating tubes 46 are installed on both sides inside the conveying box 38.

[0041] In this embodiment, during use, the airflow in the test chamber 3 can be recovered through the suction hood 44, and the return pipe 43 transports the recovered airflow back to the conveying box 38, realizing the recycling and reuse of the airflow. During recovery, the waterproof filter 45 can effectively filter water droplets in the airflow to prevent water droplets from entering the conveying box 38.

[0042] During use, the electric heating tube 46 can be activated to uniformly heat the airflow. The heated airflow passes through the main branch pipe 39, several branch pipes 40 and the ring air duct 41 and is finally output from the air outlet 42 and sent into the test chamber 3. Combined with water mist, it quickly forms a high temperature and high humidity test environment to meet the needs of specific test scenarios such as damp heat aging.

[0043] A test method for a high-humidity environment durability test device for an electric compressor, characterized by comprising the following steps: S1: Open the sealed door 4, place the electric compressor to be tested on the mounting seat 5 at the bottom of the inner side of the test chamber 3, adjust the position of the compressor so that the two side limit brackets 6 are in contact with the side wall of the compressor to achieve stable positioning of the compressor, connect the transmission main shaft 25 of the transmission assembly 8 to the input end of the electric compressor through the coupling 26, and then close the sealed door 4 so that the double sealing gasket 15 is tightly in contact with the test chamber 2 to ensure that the test chamber 3 forms a completely sealed environment and prevent outside air from entering and interfering with the test conditions; S2: Start the drive motor 7 in the mounting bracket 1. The drive motor 7 drives the transmission main shaft 25 to rotate in the magnetic fluid sealing seat 27 through the first transmission wheel 22, the transmission belt 23, and the second transmission wheel 24. Then, through the coupling 26, it drives the electric compressor to start and maintain the rated operating state. S3: Start the ultrasonic atomizer 32 in the water storage tank 10 and the conveying fan 35 at the mist outlet 33. The ultrasonic atomizer 32 splits the water into fine water mist through the cavitation effect. The conveying fan 35 accelerates the water mist to be transported along the mist guide tube 34 to the annular main tube 29. The water mist is sprayed into the entire test chamber 3 through the nozzles 31 evenly distributed at the bottom of the annular main tube 29, initially creating a high humidity environment. S4: Start the fan 37 on the top of the test chamber 2. The outside air enters the delivery box 38 after being filtered by the filter screen at the input end of the fan 37. After being buffered and stabilized, it is distributed to the ring air duct 41 through the main distribution pipe 39 and the branch distribution pipe 40. Finally, it is sprayed out from the air outlet 42 at a 35° angle to the inner wall of the test chamber 3. The airflow forms a swirling effect, carrying water mist and spiraling and spreading in the test chamber 3 to ensure uniform humidity in all areas of the chamber. At the same time, the humidity sensor 301 monitors the humidity data in the chamber in real time and feeds the data back to the external terminal. S5: During the test, the condensate generated on the inner wall of the test chamber 3 and the surface of the electric compressor flows down along the chamber wall and falls into the radial guide groove 18 of the mounting base 5. Under the guidance of the depth gradient of the guide groove 18, it quickly flows into the liquid collection chamber 19. When the condensate level in the liquid collection chamber 19 reaches the preset threshold, the drain pump 21 starts and the condensate is discharged from the equipment through the drain pipe 20 to avoid the condensate from accumulating at the bottom of the electric compressor. S6: After the test is completed, turn off the ultrasonic atomizer 32, the delivery fan 35 and the drive motor 7, open the sealed door 4, disconnect the coupling 26 from the electric compressor, and take out the electric compressor after the test.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A kind of electric compressor high humidity environment endurance test device, including mounting frame (1), it is characterized in that: The top of the mounting frame (1) is provided with a test box (2), the test box (2) is provided with a test cavity (3), a plurality of humidity sensors (301) are installed in the test cavity (3), the test box (2) is provided with a sealed cabin door (4) at the front end of the test cavity (3), the inside bottom of the test cavity (3) is provided with an assembly seat (5), the top of the assembly seat (5) is provided with a limiting frame (6) on both sides, the inside of the mounting frame (1) is provided with a driving motor (7), the power output end of the driving motor (7) is connected with a transmission assembly (8), the power output end of the transmission assembly (8) is arranged in the test cavity (3), the top of the test cavity (3) is provided with a spraying assembly (9), the input end of the spraying assembly (9) is connected with a water storage tank (10), the water storage tank (10) is installed on the mounting frame (1), the top of the test box (2) is provided with an air circulation mechanism (11), the output end of the air circulation mechanism (11) is arranged on the top of the test cavity (3).

2. The electric compressor high humidity environment durability test device according to claim 1, characterized by: The test box (2) comprises a corrosion-resistant stainless steel inner layer (12) and a galvanized outer layer (13), and the corrosion-resistant stainless steel inner layer (12) and the galvanized outer layer (13) are filled with a polyurethane heat preservation layer (14).

3. The electric compressor high humidity environment durability test device according to claim 2, characterized by: The sealed cabin door (4) is provided with a double-layer sealing washer (15) at the connection with the test box (2), the center of the sealed cabin door (4) is provided with a tempered glass observation window (16), one side of the sealed cabin door (4) is hingedly installed on the test box (2), and the other side of the sealed cabin door (4) is provided with a handle (17).

4. The electric compressor high humidity environment durability test device according to claim 3, characterized by: The assembly seat (5) is provided with a plurality of guide grooves (18), the plurality of guide grooves (18) are evenly arranged on the assembly seat (5) in a radial manner, the depth of the guide grooves (18) gradually increases from the center to the edge, a liquid collecting cavity (19) is formed between the outside of the assembly seat (5) and the test cavity (3), a drain pipe (20) is installed on one side of the bottom of the liquid collecting cavity (19), and the input end of the drain pipe (20) is connected with a drain pump (21).

5. The electric compressor high humidity environment durability test device according to claim 4, characterized by: The transmission assembly (8) comprises a first transmission wheel (22) installed at the power output end of the driving motor (7), the first transmission wheel (22) is connected with a transmission belt (23), the other side of the transmission belt (23) is connected with a second transmission wheel (24), the second transmission wheel (24) is connected with a transmission main shaft (25), one side of the transmission main shaft (25) penetrates through the test box (2) and extends into the test cavity (3), the output end of the transmission main shaft (25) is connected with a shaft coupling (26), the test box (2) is provided with a magnetic fluid sealing seat (27) at the penetration position of the transmission main shaft (25), the transmission main shaft (25) is in clearance fit with the inner ring of the magnetic fluid sealing seat (27), the clearance is filled with magnetic fluid sealing medium, and the outside of the transmission assembly (8) is provided with a dustproof and waterproof cover (28), and the dustproof and waterproof cover (28) is fixedly connected with the side wall of the test box (2).

6. The electric compressor high humidity environment durability test device according to claim 5, characterized by: The spray assembly (9) comprises a ring-shaped main pipe (29) arranged on the upper side of the test cavity (3), the top of the ring-shaped main pipe (29) is provided with a fixing frame (30), the top of the fixing frame (30) is arranged on the top of the test cavity (3), and the bottom of the ring-shaped main pipe (29) is uniformly provided with a plurality of nozzles (31).

7. The electric compressor high humidity environment durability test device according to claim 6, characterized by: The inside bottom of the water storage tank (10) is provided with an ultrasonic atomizer (32), the top of the water storage tank (10) is provided with a mist outlet (33), the output end of the mist outlet (33) is connected with a mist guide pipe (34), the output end of the mist guide pipe (34) is communicated with the ring-shaped main pipe (29), the input end of the mist outlet (33) of the water storage tank (10) is provided with a conveying fan (35), and one side of the top of the water storage tank (10) is provided with a water supplement pipe (36).

8. The electric compressor high humidity environment durability test device according to claim 7, characterized by: The air circulation mechanism (11) comprises a fan (37), the input end of the fan (37) is provided with a filter screen, the output end of the fan (37) is connected with a conveying box (38), the conveying box (38) is arranged on the top of the test box (2), the output end of the conveying box (38) is connected with a shunt main pipe (39), the shunt main pipe (39) penetrates through the top of the test box (2) and extends to the inside thereof and is connected with a plurality of shunt branch pipes (40), the output end of the shunt branch pipe (40) is connected with a ring-shaped air pipe (41), the ring-shaped air pipe (41) is arranged on the inside of the ring-shaped main pipe (29), the bottom of the ring-shaped air pipe (41) is provided with a plurality of uniformly arranged air outlets (42), and the axis of the air outlet (42) is arranged at an angle of 35° with the inside wall of the test cavity (3).

9. The electric compressor high humidity environment durability test device according to claim 8, characterized by: One side of the test box (2) is provided with a backflow pipe (43), the input end of the backflow pipe (43) is connected with a suction hood (44), the suction hood (44) is arranged in the test cavity (3), a waterproof filter screen (45) is arranged in the suction hood (44), the output end of the backflow pipe (43) is communicated with the conveying box (38), and a plurality of electric heating pipes (46) are arranged on the two sides in the conveying box (38).

10. A test method based on the high humidity durability test apparatus for an electric compressor according to any one of claims 1 to 9, characterized by: The method comprises the following steps: S1: open the sealed cabin door, place the electric compressor to be tested on the assembly seat on the inside bottom of the test cavity, adjust the position of the compressor, make the two side limiting frames fit the side walls of the compressor, realize the stable limiting of the compressor, connect the transmission main shaft of the transmission assembly with the input end of the electric compressor through the shaft coupling, then close the sealed cabin door, make the double-layer sealing gasket tightly fit the test box, ensure that the test cavity forms a completely sealed environment, and avoid that external air enters to interfere with the test condition; S2: start the driving motor in the mounting frame, drive the driving motor to rotate the transmission main shaft in the magnetic fluid sealing seat through the first transmission wheel, the transmission belt and the second transmission wheel, and then drive the electric compressor to start and maintain the rated operating state through the shaft coupling; S3: Start the ultrasonic atomizer in the water storage tank and the delivery fan at the mist outlet. The ultrasonic atomizer splits water into fine mist through cavitation effect, and the delivery fan accelerates the water mist along the mist guide pipe to the annular main pipe. The water mist is sprayed uniformly to the test chamber through the nozzles evenly distributed at the bottom of the annular main pipe, and a high-humidity environment is initially established; S4: Start the fan at the top of the test chamber. External air is filtered through the filter screen at the input end of the fan, enters the delivery box, is buffered and stabilized, is distributed to the annular air pipe through the shunt main pipe and shunt branch pipe, and is finally sprayed out from the air outlet at a 35° angle with the inner side wall of the test chamber. The airflow forms a cyclone effect, and the water mist is spirally circulated and diffused in the test chamber, ensuring uniform humidity in each area of the chamber. At the same time, the humidity sensor monitors the humidity data in the chamber in real time and feeds back the data to the external terminal; S5: During the test, the condensate water generated on the inner wall of the test chamber and the surface of the electric compressor flows down along the wall, falls into the radial flow guide groove of the mounting seat, and flows quickly into the liquid collection chamber under the guidance of the depth gradient of the flow guide groove. When the liquid level of the condensate water in the liquid collection chamber reaches the preset threshold, the drainage pump starts, and the condensate water is discharged from the equipment through the drain pipe to avoid accumulation of condensate water at the bottom of the electric compressor; S6: After the test is completed, the ultrasonic atomizer, the delivery fan and the driving motor are turned off, the seal door is opened, the coupling is disconnected from the electric compressor, and the tested electric compressor can be taken out.

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