An electronic water pump controller performance detection device and a use method thereof

Abstract

The application discloses an electronic water pump controller performance detection device and a use method, relates to the technical field of electronic water pump controller performance detection, and comprises a box body, two supports are arranged on the bottom outer wall of the box body, and a sealing door is further arranged on the box body, and the device further comprises: a lifting driving mechanism, which is located on the two sides of the box body; a sealing partition mechanism, which is located in the interior of the box body; the sealing partition mechanism comprises two baffle plates and a bearing frame, and the two baffle plates are horizontally arranged in the interior of the box body. The electronic water pump controller performance detection device disclosed by the application can effectively simulate the environment with sharp temperature change under the actual vehicle working condition, thereby exposing potential reliability problems, such as welding point cracking and sealing failure, caused by thermal expansion and cold contraction stress, avoiding temperature crosstalk between the high-temperature chamber and the low-temperature chamber, and improving the testing precision.

Description

Technical Field

[0001] This invention relates to the field of electronic water pump controller performance testing technology, and in particular to an electronic water pump controller performance testing device and its usage method. Background Technology

[0002] The core purpose of performance testing for electronic water pump controllers is to ensure that they can accurately and reliably drive the water pump in harsh environments such as automobiles, thereby achieving the safety and efficiency of the thermal management system. This directly relates to the lifespan and energy consumption of the engine or battery. The testing mainly focuses on electrical characteristics, control accuracy, safety protection, and environmental tolerance.

[0003] Existing temperature shock testing devices, such as the common two-chamber thermal shock chamber, can only slowly switch the temperature zone between the high-temperature chamber and the low-temperature chamber of the tested sample, or can only perform steady-state high-temperature or low-temperature tests. Such devices are difficult to realize the rapid temperature change of the controller from extreme cold to extreme heat in a short period of time, which may lead to the inability to effectively simulate the actual vehicle working conditions, and thus make it difficult to discover the potential failure modes that may occur in the product under thermal expansion and contraction stress. Summary of the Invention

[0004] This invention discloses a performance testing device for an electronic water pump controller, aiming to solve the problems of existing temperature shock testing devices, such as common two-chamber thermal shock chambers, which can only slowly switch the test sample between the high-temperature chamber and the low-temperature chamber, or can only perform steady-state high-temperature or low-temperature tests. Such devices are difficult to realize the rapid temperature change of the controller from extreme cold to extreme heat in a short period of time, which may lead to the inability to effectively simulate the actual vehicle working conditions, and thus make it difficult to discover the technical problems in the potential failure modes of the product under thermal expansion and contraction stress.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An electronic water pump controller performance testing device includes a housing, two supports on the bottom outer wall of the housing, and a sealed door on the housing. It also includes: Lifting drive mechanism: located on both sides of the housing; Sealing partition mechanism: located inside the housing; the sealing partition mechanism includes two partitions and a support frame. The two partitions are horizontally arranged inside the housing, dividing the housing from top to bottom into a high-temperature chamber, a fixed chamber, and a low-temperature chamber. The support frame is fixedly connected to the lifting drive mechanism. Multiple vents are provided on both outer walls of the support frame. Several uprights are provided on the top and bottom outer walls of the support frame. A sealing plug is provided at the end of the upright away from the support frame. Several mounting holes are provided on both partitions. The uprights are slidably connected in the corresponding mounting holes. The sealing plug has a frustum-shaped structure, and the mounting hole is a conical hole. The sealing plug can be embedded in the mounting hole to form a sealing fit. Circulation assembly: used to drive the gas circulation flow within the high-temperature chamber and the low-temperature chamber.

[0006] The above technical solution can effectively simulate the environment of drastic temperature changes under actual vehicle conditions, thereby exposing potential reliability problems such as weld cracking and seal failure caused by thermal expansion and contraction stress, avoiding temperature crosstalk between the high-temperature chamber and the low-temperature chamber, and improving test accuracy. Specifically, before the test begins, the operator introduces high-temperature gas into the high-temperature chamber through an external heat source such as a hot air generator to raise the temperature in the high-temperature chamber to the target temperature. At the same time, low-temperature gas is introduced into the low-temperature chamber through an external cold source (such as a refrigeration unit) to lower the temperature in the low-temperature chamber to the target temperature. Then the operator starts the circulation component to drive the gas circulation flow in the high-temperature chamber and the low-temperature chamber to make the temperature distribution uniform. At the start of the test, the operator placed the electronic water pump controller to be tested into the hollow inner cavity of the support frame, then closed the sealing door to create a sealed environment inside the chamber. The operator then used the lifting drive mechanism to raise the support frame to a predetermined position within the high-temperature chamber. The uprights on the bottom outer wall of the support frame slid along the mounting holes on the partition, and the sealing plugs fixed to the ends of the uprights were inserted into the mounting holes of the partition from below. Because the sealing plugs have a frustum-shaped structure and the mounting holes are conical holes that mate with this frustum-shaped structure, the conical surface of the sealing plug fits tightly against the conical wall of the mounting hole, forming a... A reliable conical seal is formed, completely blocking the airflow channel between the high-temperature chamber and the fixed chamber. Similarly, when the support frame descends to the predetermined position in the low-temperature chamber, the sealing plug on the top upright of the support frame is inserted from above into the mounting hole of the corresponding partition, completely blocking the airflow channel between the low-temperature chamber and the fixed chamber. This conical seal structure can automatically complete the sealing each time the temperature zone is switched, effectively preventing temperature crosstalk between the high-temperature chamber and the low-temperature chamber, ensuring the independence and stability of the temperature of each chamber, and improving the accuracy and reliability of the temperature shock test.

[0007] In a preferred embodiment, the lifting drive mechanism includes two fixed frames and two second motors. The second motors are fixedly mounted on the fixed frames. The two fixed frames are respectively fixedly mounted on the outer walls of both sides of the housing. Two connecting shafts are also connected to the inner wall of one side of the housing via bearings. One end of each connecting shaft passes through the inner wall of one side of the housing, and a first mounting wheel and a second mounting wheel are respectively fixedly connected to both ends of the connecting shaft. Both the first and second mounting wheels are provided with toothed rings. A toothed chain is provided between two adjacent first mounting wheels and between two adjacent second mounting wheels. The toothed rings and the toothed chains mesh and drive each other. The output shaft of the second motor is fixedly connected to one of the second mounting wheels.

[0008] In this design, the output shaft of the second motor rotates, driving the second mounting wheel, which is fixedly connected to it, to rotate. When the second mounting wheel rotates, it drives the toothed ring on it to rotate, and the toothed ring drives the toothed chain to move. At the same time, the rotation of the second mounting wheel is transmitted to the first mounting wheel, which is fixedly connected to it on the same axis, through the connecting shaft. The first mounting wheel rotates synchronously, driving the other toothed chain to move. Thus, the second connecting block, which is fixed to the toothed chain, moves up and down synchronously with the movement of the toothed chain. Since both the first and second connecting blocks are fixedly connected to the carrier frame, the continuous rotary motion of the toothed chain is converted into the linear lifting motion of the carrier frame. By controlling the forward and reverse rotation of the second motor, a smooth and controllable reciprocating motion of the carrier frame between the high-temperature chamber and the low-temperature chamber is achieved.

[0009] In a preferred embodiment, the circulation assembly includes two first motors. The side walls of the high-temperature chamber and the low-temperature chamber are respectively connected to a first connecting pipe and a second connecting pipe. The high-temperature chamber and the low-temperature chamber are also respectively provided with a first air inlet pipe and a second air inlet pipe. The interior of the high-temperature chamber and the interior of the low-temperature chamber are both provided with mounting frames. The output shaft of the first motor is fixedly connected to a second bevel gear. The air inlets of the first connecting pipe and the air inlets of the second connecting pipe are both connected to a connecting frame through bearings. The connecting frame is provided with a mounting rod. The mounting rod is provided with a first bevel gear. The end of the mounting rod away from the connecting frame is fixedly connected to multiple fan blades. The first bevel gear and the second bevel gear mesh with each other.

[0010] In this scheme, before the test begins, high-temperature gas is introduced into the high-temperature chamber through the first air inlet pipe via an external heat source (such as a hot air generator) to raise the temperature in the high-temperature chamber to the target temperature. Simultaneously, low-temperature gas is introduced into the low-temperature chamber through the second air inlet pipe via an external cold source (such as a refrigeration unit) to lower the temperature in the low-temperature chamber to the target temperature. Gas is continuously introduced through the first and second air inlet pipes to maintain a certain positive pressure and temperature inside both the high-temperature and low-temperature chambers. Then, two first motors are started. Taking the high-temperature chamber side as an example: the output shaft of the first motor rotates, driving the second bevel gear fixed to it to rotate synchronously. Since the second bevel gear meshes with the first bevel gear on the mounting rod, and the axes of the first and second bevel gears are perpendicular to each other, the rotation of the second bevel gear... The rotational motion is transmitted to the first bevel gear through meshing, causing it to rotate around its own axis. The first bevel gear is fixed to the mounting rod, which is mounted at the air inlet of the first connecting pipe via a connecting bracket and bearings. Thus, the rotation of the first bevel gear drives the mounting rod to rotate synchronously. Multiple fan blades fixedly connected to the end of the mounting rod away from the connecting bracket rotate accordingly. When the fan blades rotate, they generate suction on the gas in the first connecting pipe. The rotation of the fan blades creates an airflow in the first connecting pipe, drawing the hot gas from the high-temperature chamber out of the chamber and sending it back into the chamber through the first connecting pipe. During the circulation process, the hot gas repeatedly flows through various areas of the chamber, carrying heat from high-temperature areas (such as near the air inlet) to low-temperature areas (such as the corners of the chamber), gradually making the temperature in the entire high-temperature chamber more uniform.

[0011] A method for using an electronic water pump controller performance testing device includes the following steps: S1. Before the test begins, the operator introduces high-temperature gas into the high-temperature chamber through an external heat source such as a hot air generator to raise the temperature in the high-temperature chamber to the target temperature. At the same time, low-temperature gas is introduced into the low-temperature chamber through an external cold source (such as a refrigeration unit) to lower the temperature in the low-temperature chamber to the target temperature. Then, the circulation component is started to drive the gas circulation flow in the high-temperature chamber and the low-temperature chamber to make the temperature distribution uniform. S2. Then, the operator opens the sealed door on the chamber, puts the electronic water pump controller to be tested into the hollow inner cavity of the support frame, closes the sealed door, and a sealed environment is formed inside the chamber. S3. Secondly, the operator drives the carrier frame to move up and down using the lifting drive mechanism. When the carrier frame rises to the preset position, the sealing plug on the bottom upright of the carrier frame is embedded in the mounting hole of the partition to achieve a seal. The hot gas in the high-temperature chamber enters the inner cavity of the carrier frame through the vent on the side wall of the carrier frame to heat the electronic water pump controller inside the carrier frame. After the high-temperature exposure time reaches the preset value, the operator drives the carrier frame to move down quickly using the lifting drive mechanism. When the carrier frame descends to the preset position inside the low-temperature chamber, the carrier frame stops descending, and the sealing plug on the top upright is completely embedded in the mounting hole of the partition to achieve a seal. The cold gas in the low-temperature chamber enters the inner cavity of the carrier frame through the vent on the side wall of the carrier frame to cool the electronic water pump controller inside the carrier frame. After the low-temperature exposure time reaches the preset value, the operator drives the carrier frame to move up again using the lifting drive mechanism to quickly return it from the low-temperature chamber to the high-temperature chamber. This process of repeatedly raising and lowering the carrier frame allows the electronic water pump controller to be alternately exposed between the high-temperature chamber and the low-temperature chamber, achieving multiple high and low temperature shock cycles. S4. After completing the preset number of temperature shock cycles, the operator moves the carrier frame to the fixed chamber position through the lifting drive mechanism, opens the sealing door, and takes out the electronic water pump controller from the hollow inner cavity of the carrier frame. Then, the controller is subjected to visual inspection, electrical performance testing and sealing test to evaluate its reliability under the action of thermal expansion and contraction stress.

[0012] The beneficial effects of this invention are: 1. This invention uses a lifting drive mechanism to rapidly switch the support frame between a high-temperature chamber and a low-temperature chamber, allowing the electronic water pump controller to withstand alternating high and low temperatures in a short period of time. This effectively simulates the environment of drastic temperature changes under real vehicle operating conditions. This rapid temperature shock function can fully expose potential reliability problems of the controller, such as weld cracking and sealing failure caused by thermal expansion and contraction stress, providing an effective testing method for product reliability verification. 2. The lifting drive mechanism in this invention is driven by a second motor, which drives the first mounting wheel to rotate via a connecting shaft. The power is transmitted to the carrier frame through a toothed chain. The second connecting block, fixed on the toothed chain, moves up and down synchronously with the movement of the toothed chain. The first connecting block, which is slidably connected to the guide rod, slides vertically along the guide rod. Together, they convert the continuous rotational motion of the toothed chain into the linear lifting motion of the carrier frame. By controlling the forward and reverse rotation of the second motor, a smooth and controllable reciprocating motion of the carrier frame between the high-temperature chamber and the low-temperature chamber is achieved. This ensures that the speed of temperature zone switching meets the stringent requirements of temperature shock, while also ensuring the smoothness of the lifting process to avoid displacement or damage to the sample during the switching process. 3. The present invention drives the first bevel gear to rotate through the first motor, and drives the fan blade to rotate through the meshing transmission of the first bevel gear and the second bevel gear. When the fan blade rotates, it drives the gas in the high temperature chamber or low temperature chamber to circulate through the connecting pipe, so that the gas in the high temperature chamber / low temperature chamber repeatedly flows through each area, carrying heat or cold from the high temperature or low temperature area near the air inlet to each corner of the chamber. This forced convection circulation effectively eliminates the temperature stratification phenomenon and local cold or hot spots in the high temperature chamber / low temperature chamber, so that the temperature distribution in the entire chamber is uniform. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an electronic water pump controller performance testing device proposed in this invention.

[0014] Figure 2 This is a cross-sectional view of the circulation component structure of an electronic water pump controller performance testing device proposed in this invention.

[0015] Figure 3 This is a schematic diagram of the partition structure of an electronic water pump controller performance testing device proposed in this invention.

[0016] Figure 4 This is a schematic diagram of the lifting drive mechanism of an electronic water pump controller performance testing device proposed in this invention.

[0017] Figure 5 This is a schematic diagram of the first and second mounting wheels of an electronic water pump controller performance testing device proposed in this invention.

[0018] Figure 6 This is a schematic diagram of the mounting frame structure of an electronic water pump controller performance testing device proposed in this invention.

[0019] Figure 7 This is a schematic diagram of the sealing isolation mechanism of an electronic water pump controller performance testing device proposed in this invention.

[0020] Figure 8 This is a cross-sectional view of the sealing isolation mechanism of an electronic water pump controller performance testing device proposed in this invention.

[0021] Figure 9 This is a schematic diagram of the first and second bevel gears of an electronic water pump controller performance testing device proposed in this invention.

[0022] In the diagram: 1. Housing; 2. Bracket; 3. Sealing door; 4. First air inlet pipe; 5. Second air inlet pipe; 6. First connecting pipe; 7. Second connecting pipe; 8. Fixing frame; 9. First motor; 10. Exhaust pipe; 11. Exhaust valve; 12. Partition plate; 13. Bearing frame; 14. Mounting frame; 15. Connecting plate; 16. First connecting block; 17. Buffer pad; 18. Second motor; 19. Guide rod; 20. Second connecting block; 21. First mounting wheel; 22. Gear chain; 23. Gear ring; 24. Connecting shaft; 25. Second mounting wheel; 26. Vent; 27. Upright pole; 28. Sealing plug; 29. ​​Mounting hole; 30. Filter screen; 31. Connecting frame; 32. Mounting rod; 33. First bevel gear; 34. Fan blade; 35. Second bevel gear. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Reference Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 An electronic water pump controller performance testing device includes a housing 1, two supports 2 on the bottom outer wall of the housing 1, and a sealed door 3 on the housing 1. It also includes: Lifting drive mechanism: located on both sides of housing 1; Sealing partition mechanism: located inside the housing 1; the sealing partition mechanism includes two partitions 12 and a support frame 13. The two partitions 12 are horizontally arranged inside the housing 1, and the two partitions 12 divide the housing 1 from top to bottom into a high-temperature chamber, a fixed chamber and a low-temperature chamber. The support frame 13 is fixedly connected to the lifting drive mechanism. Multiple vents 26 are opened on both outer walls of the support frame 13. Several uprights 27 are provided on the top and bottom outer walls of the support frame 13. A sealing plug 28 is provided at the end of the upright 27 away from the support frame 13. Several mounting holes 29 are opened on both partitions 12. The uprights 27 are slidably connected in the corresponding mounting holes 29. The sealing plug 28 has a frustum-shaped structure and the mounting hole 29 has a conical hole. The sealing plug 28 can be embedded in the mounting hole 29 and form a sealing fit. Circulation assembly: Used to drive the gas circulation flow within the high-temperature chamber and the low-temperature chamber.

[0025] It should be noted that the fixed chamber is the permanent residence area of ​​the bearing frame 13 and the transition area for temperature zone switching.

[0026] The sealing plug 28 on the upright 27 on the top outer wall of the support frame 13 is located in the high-temperature chamber, and the sealing plug 28 on the upright 27 on the bottom outer wall of the support frame 13 is located in the low-temperature chamber. When the support frame 13 rises from the fixed chamber to the high-temperature chamber, the sealing plug 28 on the bottom upright 27 needs to be embedded in the mounting hole 29 of the upper partition 12 to block the communication between the high-temperature chamber and the fixed chamber. When the support frame 13 descends from the fixed chamber to the low-temperature chamber, the top sealing plug 28 is already located in the high-temperature chamber and is very close to the mounting hole 29 on the top surface of the lower partition 12. It can also quickly complete the sealing in the early stage of descent, blocking the airflow exchange between the low-temperature chamber and the fixed chamber. Whether rising or falling, the sealing plug 28 used for sealing is in a position close to the target mounting hole 29 in advance, thereby realizing a rapid response sealing during bidirectional switching and reducing the temperature crosstalk time and gas leakage during the temperature zone switching process.

[0027] In practical implementation, the support frame 13 is a frame structure with a hollow inner cavity. Both the top inner wall of the high-temperature chamber and the bottom inner wall of the low-temperature chamber are equipped with buffer pads 17. This arrangement allows hot air from the high-temperature chamber or cold air from the low-temperature chamber to freely flow into the hollow inner cavity of the support frame 13 through the vent 26, directly surrounding and contacting the electronic water pump controller placed within the cavity. Furthermore, the buffer pads 17 absorb the impact energy when the support frame 13 is raised or lowered to its extreme position, protecting the electronic water pump controller inside the support frame 13 and preventing external damage unrelated to the testing purpose, thus avoiding misleading test results.

[0028] It should be noted that the buffer pad 17 is made of elastic material, such as silicone rubber, fluororubber or heat-resistant sponge that is resistant to high and low temperatures. It has high resilience and can absorb the impact energy when the load-bearing frame 13 is raised or lowered to the limit position.

[0029] Specifically, before the test begins, the operator introduces high-temperature gas into the high-temperature chamber through an external heat source such as a hot air generator, so that the temperature in the high-temperature chamber rises to the target temperature. At the same time, the operator introduces low-temperature gas into the low-temperature chamber through an external cold source such as a refrigeration unit, so that the temperature in the low-temperature chamber drops to the target temperature. Then the operator starts the circulation component to drive the gas circulation flow in the high-temperature chamber and the low-temperature chamber, so that the temperature distribution is uniform. At the start of the test, the carrier frame 13 is located in the fixed chamber. The operator opens the sealing door 3 on the box 1, puts the electronic water pump controller to be tested into the hollow inner cavity of the carrier frame 13, and fixes it in the carrier frame 13. The sealing door 3 is closed, and a sealed environment is formed inside the box 1. At this time, since the carrier frame 13 is located in the fixed chamber, the sealing plugs 28 on the top upright 27 and the bottom upright 27 of the carrier frame 13 are not in contact with the mounting holes 29 of any partition 12. The high temperature chamber, the fixed chamber and the low temperature chamber are connected by airflow through the mounting holes 29 and the vents 26 on the side wall of the carrier frame 13. Subsequently, the operator drives the support frame 13 to move up and down through the lifting drive mechanism. When the support frame 13 rises, the upright 27 fixed to its bottom outer wall slides upward and passes through the mounting hole 29 on the lower partition 12. When the top of the support frame 13 contacts the buffer pad 17, the support frame 13 stops rising, and the sealing plug 28 on the bottom upright 27 is completely embedded in the mounting hole 29 of the partition 12, completing the seal and thus completely blocking the airflow channel between the high-temperature chamber and the fixed chamber.

[0030] At this time, the support frame 13 is completely located in the high-temperature chamber. The sealing plug 28 on its top upright 27 is located in the top area of ​​the high-temperature chamber and does not contact the top partition 12. The sealing plug 28 on the bottom upright 27 is embedded in the mounting hole 29 of the partition 12 to achieve a seal. The hot gas in the high-temperature chamber enters the inner cavity of the support frame 13 through the vent 26 on the side wall of the support frame 13 and heats the electronic water pump controller in the support frame 13. The heat in the high-temperature chamber continuously acts on the controller, so that its overall temperature reaches and stabilizes at the high-temperature set value.

[0031] After the high-temperature exposure time reaches the predetermined value, the operator drives the carrier frame 13 to move downwards quickly via the lifting drive mechanism. At the moment the carrier frame 13 descends, the sealing plug 28 on the bottom upright 27 is dislodged from the mounting hole 29 of the partition 12, and the seal between the high-temperature chamber and the fixed chamber is released. The carrier frame 13 quickly passes through the fixed chamber and continues to move downwards into the low-temperature chamber. During this process, the electronic water pump controller carried in the carrier frame 13 is rapidly transferred from the high-temperature environment to the low-temperature environment, achieving a rapid temperature shock. When the carrier frame 13 descends to the predetermined position inside the low-temperature chamber, the upright 27 fixed to the top outer wall of the carrier frame 13 slides downwards and passes through the mounting hole 29 on the upper partition 12. The sealing plug 28 on the top upright 27 of the carrier frame 13 is inserted into the mounting hole 29 of the partition 12 from above, and its conical surface fits tightly with the conical hole wall of the mounting hole 29 to form a sealing fit, completely blocking the airflow channel between the low-temperature chamber and the fixed chamber.

[0032] At this point, when the bottom of the support frame 13 contacts the buffer pad 17, the support frame 13 stops descending, and the sealing plug 28 on the top upright 27 is completely embedded in the mounting hole 29 of the partition 12, completing the seal. The cold gas in the low-temperature chamber enters the inner cavity of the support frame 13 through the vent 26 on the side wall of the support frame 13, cooling the electronic water pump controller inside the support frame 13. After the low-temperature exposure time reaches the predetermined value, the operator drives the support frame 13 upward again through the lifting drive mechanism, so that it quickly returns from the low-temperature chamber to the high-temperature chamber, completing the second temperature shock. The support frame 13 is raised and lowered repeatedly in this way, so that the electronic water pump controller is alternately exposed between the high-temperature chamber and the low-temperature chamber, realizing multiple high and low temperature shock cycles.

[0033] After completing a preset number of temperature shock cycles, the operator moves the carrier frame 13 to the fixed chamber position using the lifting drive mechanism, opens the sealing door 3, and removes the electronic water pump controller from the hollow inner cavity of the carrier frame 13. The controller is then subjected to visual inspection, electrical performance testing, and sealing checks to assess its reliability under thermal expansion and contraction stress. This device effectively simulates the environment of drastic temperature changes under real-vehicle operating conditions, thereby exposing potential reliability problems such as weld cracking and seal failure caused by thermal expansion and contraction stress, avoiding temperature crosstalk between the high-temperature chamber and the low-temperature chamber, and improving test accuracy.

[0034] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In a preferred embodiment, the lifting drive mechanism includes two fixed frames 8 and two second motors 18. The second motors 18 are fixedly mounted on the fixed frames 8. The two fixed frames 8 are respectively fixedly mounted on the outer walls of both sides of the housing 1. Two connecting shafts 24 are also connected to the inner wall of one side of the housing 1 by bearings. One end of the connecting shaft 24 passes through the inner wall of one side of the housing 1, and the two ends of the connecting shaft 24 are respectively fixedly connected to a first mounting wheel 21 and a second mounting wheel 25. Both the first mounting wheel 21 and the second mounting wheel 25 are provided with toothed rings 23. Toothed chains 22 are provided between two adjacent first mounting wheels 21 and between two adjacent second mounting wheels 25. The toothed rings 23 and the toothed chains 22 mesh and drive each other. The output shaft of the second motor 18 is fixedly connected to one of the second mounting wheels 25.

[0035] The fixed frame 8 is provided with two connecting plates 15, which pass through the inner wall of one side of the housing 1. Each connecting plate 15 is provided with a guide rod 19. A second connecting block 20 is fixedly connected to the toothed chain 22. A first connecting block 16 is slidably connected to the guide rod 19. The first connecting block 16 and the second connecting block 20 are both fixedly connected to the outer wall of the same side of the bearing frame 13. Since the first connecting block 16 and the second connecting block 20 are simultaneously fixed on the same side wall of the bearing frame 13, and the first connecting block 16 is constrained in the vertical direction by the guide rod 19, the two together restrict the relative displacement of the bearing frame 13 on this side wall, so that the bearing frame 13 cannot rotate around the vertical axis, thereby avoiding the twisting and tilting of the bearing frame 13 during the lifting process.

[0036] In addition, the two guide rods 19 are symmetrically distributed about the center line of the toothed chain 22. This arrangement facilitates the balance of force on the load-bearing frame 13 during lifting and lowering, and prevents jamming between the upright 27 and the mounting hole 29 due to uneven force, thus ensuring smooth lifting and reliable sealing.

[0037] Specifically, when it is necessary to move the carrier frame 13 from the fixed chamber to the high temperature chamber or the low temperature chamber, the operator starts two second motors 18 at the same time. Taking the transmission path on one side as an example: the output shaft of the second motor 18 rotates, which drives the second mounting wheel 25 fixedly connected to it to rotate. When the second mounting wheel 25 rotates, it drives the toothed ring 23 on it to rotate. The toothed ring 23 drives the toothed chain 22 to move. At the same time, the rotation of the second mounting wheel 25 is transmitted to the first mounting wheel 21 fixedly connected to the same axis through the connecting shaft 24. The first mounting wheel 21 rotates synchronously, which drives the other toothed chain 22 to move. Thus, the second connecting block 20 fixed on the toothed chain 22 moves up and down synchronously with the movement of the toothed chain 22. Since the first connecting block 16 and the second connecting block 20 are both fixedly connected to the carrier frame 13, the continuous rotational motion of the toothed chain 22 is converted into the linear lifting motion of the carrier frame 13. When the second motor 18 rotates in the forward direction, the toothed chain 22 moves upward, and the second connecting block 20 moves upward with the toothed chain 22, causing the bearing frame 13 to slide upward along the guide rod 19. When the upright 27 and sealing plug 28 at the top of the bearing frame 13 reach the predetermined position in the high-temperature chamber, the upright 27 on the bearing frame 13 passes through the mounting hole 29 of the upper partition 12, and the sealing plug 28 at the bottom of the bearing frame 13 is embedded and sealed with the mounting hole 29 on the partition 12, thereby fixing the connection between the chamber and the high-temperature chamber. The second motor 18 stops rotating, and the bearing frame 13 remains in the high-temperature chamber. When the second motor 18 rotates in the reverse direction, the toothed chain 22 moves downward, and the second connecting block 20 moves downward with the toothed chain 22, causing the carrier frame 13 to slide downward along the guide rod 19. When the upright 27 and sealing plug 28 at the bottom of the carrier frame 13 reach the predetermined position in the low-temperature chamber, the sealing plug 28 at the top of the carrier frame 13 is embedded and sealed with the mounting hole 29, and the fixed chamber is connected to the low-temperature chamber. Then the second motor 18 stops rotating, and the carrier frame 13 stays in the low-temperature chamber, thereby realizing the smooth and controllable reciprocating motion of the carrier frame 13 between the high-temperature chamber and the low-temperature chamber. Compared with pure hand-crank drive, the second motor 18 drive can precisely control the lifting speed and stopping position of the carrier frame 13.

[0038] Reference Figure 1 , Figure 2 , Figure 3 and Figure 9 In a preferred embodiment, the circulation assembly includes two first motors 9. The side walls of the high-temperature chamber and the low-temperature chamber are respectively connected to a first connecting pipe 6 and a second connecting pipe 7. The high-temperature chamber and the low-temperature chamber are also respectively provided with a first air inlet pipe 4 and a second air inlet pipe 5. The interior of the high-temperature chamber and the interior of the low-temperature chamber are both provided with mounting frames 14. The output shaft of the first motor 9 is fixedly connected to a second bevel gear 35. The air inlets of the first connecting pipe 6 and the second connecting pipe 7 are both connected to a connecting frame 31 through bearings. The connecting frame 31 is provided with a mounting rod 32. The mounting rod 32 is provided with a first bevel gear 33. The end of the mounting rod 32 away from the connecting frame 31 is fixedly connected to a plurality of fan blades 34. The first bevel gear 33 and the second bevel gear 35 mesh with each other.

[0039] The mounting frame 14 has an installation opening on one outer wall. The mounting frame 14 and the inner wall of the housing 1 enclose a space with an opening on one side. The mounting frame 14 is connected to the interior of the chamber through the installation opening. The inner wall of the installation opening is equipped with a filter screen 30. When the fan blade 34 drives the gas to circulate, the gas passes through the filter screen 30 on the mounting frame 14 from the chamber and enters the installation opening. It flows into the space enclosed by the mounting frame 14 and the inner wall of the housing 1, and then flows out from the opening side of the mounting frame 14 and re-enters the interior of the chamber. During this process, the filter screen 30 on the inner wall of the installation opening filters the airflow and removes impurities such as dust and fibers that may be carried in the gas, preventing impurities from entering the circulation pipe or adhering to the fan blade 34, which would affect the rotational balance and service life of the fan blade 34.

[0040] It should be noted that both the high-temperature chamber and the low-temperature chamber have exhaust pipes 10 connected to one inner wall. The exhaust pipes 10 are equipped with exhaust valves 11. As gas is continuously introduced into the chamber through the inlet pipe, the pressure inside the chamber will gradually increase. When the pressure exceeds the predetermined value, the operator opens the exhaust valve 11, and the gas is discharged from the chamber through the exhaust pipe 10 to the external environment or recovery device. By adjusting the opening of the exhaust valve 11, the operator can control the gas discharge rate in the chamber, thereby adjusting the pressure inside the chamber.

[0041] The high-temperature chamber and the low-temperature chamber are connected to an exhaust pipe 10 on one side of their inner walls, and an exhaust valve 11 is provided on the exhaust pipe 10.

[0042] It should be noted that the exhaust valve 11 can be a manual ball valve or a manual butterfly valve. The operator can adjust the valve opening and control the exhaust rate by rotating the handle. Alternatively, a mechanical self-operated pressure regulating valve can be used, which does not require an external power source and automatically adjusts the opening by relying on the spring and diaphragm to sense the pressure.

[0043] It should be noted that when the carrier frame 13 is transferred from the high-temperature chamber to the low-temperature chamber, the hot gas in the high-temperature chamber may leak into the fixed chamber or the low-temperature chamber through the mounting hole 29 on the partition 12. However, during this process, the continuous operation of the circulation component keeps the gas in each chamber in a forced flow state. Even if a small amount of gas leakage occurs, the circulating airflow can quickly dilute and discharge the leaked gas, reducing the impact on temperature stability. At the same time, the exhaust valve 11 on the exhaust pipe 10 can respond quickly when the pressure fluctuates, discharging excess leaked gas and maintaining the temperature balance in the high-temperature chamber and the low-temperature chamber.

[0044] Specifically, before the experiment begins, high-temperature gas is introduced into the high-temperature chamber through the first air inlet pipe 4 via an external heat source such as a hot air generator, so that the temperature in the high-temperature chamber rises to the target temperature. At the same time, low-temperature gas is introduced into the low-temperature chamber through the second air inlet pipe 5 via an external cold source such as a refrigeration unit, so that the temperature in the low-temperature chamber drops to the target temperature. Gas is continuously introduced into the first air inlet pipe 4 and the second air inlet pipe 5 to maintain a certain positive pressure and temperature inside the high-temperature chamber and the low-temperature chamber. Once the temperatures in the high-temperature and low-temperature chambers stabilize, the two first motors 9 are activated. Taking the high-temperature chamber side as an example: the output shaft of the first motor 9 rotates, driving the second bevel gear 35 fixed on it to rotate synchronously. Since the second bevel gear 35 meshes with the first bevel gear 33 on the mounting rod 32, and the axes of the first bevel gear 33 and the second bevel gear 35 are perpendicular to each other, the rotational motion of the second bevel gear 35 is transmitted to the first bevel gear 33 through the meshing relationship, causing it to rotate around its own axis. The first bevel gear 33 is fixed on the mounting rod 32, which is mounted to the air inlet of the first connecting pipe 6 via the connecting bracket 31 and bearings. At the inlet, the rotation of the first bevel gear 33 drives the mounting rod 32 to rotate synchronously. Multiple fan blades 34, which are fixedly connected to the end of the mounting rod 32 away from the connecting frame 31, rotate accordingly. When the fan blades 34 rotate, they generate suction on the gas in the first connecting pipe 6. The rotation of the fan blades 34 causes airflow to form in the first connecting pipe 6, drawing the hot gas in the high-temperature chamber out of the chamber and sending it back into the chamber through the first connecting pipe 6. During the circulation process, the hot gas repeatedly flows through various areas in the chamber, carrying heat from high-temperature areas such as near the air inlet to low-temperature areas such as the corners of the chamber, so that the temperature in the entire high-temperature chamber gradually becomes more uniform. During the test, as the first air inlet pipe 4 and the second air inlet pipe 5 continuously introduce gas into the corresponding high-temperature chamber and low-temperature chamber, the pressure in the high-temperature chamber / low-temperature chamber will gradually increase. When the pressure exceeds the predetermined value, the operator opens the exhaust valve 11 on the corresponding exhaust pipe 10 to discharge some of the gas from the chamber, so that the pressure in the chamber is maintained within a safe range.

[0045] Working principle: Before the test begins, the operator introduces high-temperature gas into the high-temperature chamber through an external heat source such as a hot air generator, so that the temperature in the high-temperature chamber rises to the target temperature. At the same time, low-temperature gas is introduced into the low-temperature chamber through an external cold source such as a refrigeration unit, so that the temperature in the low-temperature chamber drops to the target temperature. Then the operator starts the circulation component to drive the gas circulation flow in the high-temperature chamber and the low-temperature chamber, so that the temperature distribution is uniform. At the start of the test, the carrier frame 13 is located in the fixed chamber. The operator opens the sealing door 3 on the box 1, puts the electronic water pump controller to be tested into the hollow inner cavity of the carrier frame 13, and fixes it in the carrier frame 13. The sealing door 3 is closed, and a sealed environment is formed inside the box 1. At this time, since the carrier frame 13 is located in the fixed chamber, the sealing plugs 28 on the top upright 27 and the bottom upright 27 of the carrier frame 13 are not in contact with the mounting holes 29 of any partition 12. The high temperature chamber, the fixed chamber and the low temperature chamber are connected by airflow through the mounting holes 29 and the vents 26 on the side wall of the carrier frame 13. Subsequently, the operator drives the support frame 13 to move up and down through the lifting drive mechanism. When the support frame 13 rises, the upright 27 fixed to its bottom outer wall slides upward and passes through the mounting hole 29 on the lower partition 12. When the top of the support frame 13 contacts the buffer pad 17, the support frame 13 stops rising. The sealing plug 28 on the bottom upright 27 is completely embedded in the mounting hole 29 of the partition 12, completing the seal and thus completely blocking the airflow channel between the high-temperature chamber and the fixed chamber. At this time, the support frame 13 is completely located in the high-temperature chamber. The sealing plug 28 on its top upright 27 is located in the top area of ​​the high-temperature chamber and does not contact the top partition 12. The sealing plug 28 on the bottom upright 27 is embedded in the mounting hole 29 of the partition 12 to achieve a seal. The hot gas in the high-temperature chamber enters the inner cavity of the support frame 13 through the vent 26 on the side wall of the support frame 13 and heats the electronic water pump controller in the support frame 13. The heat in the high-temperature chamber continuously acts on the controller, so that its overall temperature reaches and stabilizes at the high-temperature set value.

[0046] After the high-temperature exposure time reaches the predetermined value, the operator drives the carrier frame 13 to move downward quickly through the lifting drive mechanism. At the moment the carrier frame 13 descends, the sealing plug 28 on the bottom upright 27 is dislodged from the mounting hole 29 of the partition 12, and the seal between the high-temperature chamber and the fixed chamber is released. The carrier frame 13 quickly passes through the fixed chamber and continues to move downward into the low-temperature chamber. During this process, the electronic water pump controller carried in the carrier frame 13 is rapidly transferred from the high-temperature environment to the low-temperature environment, realizing a rapid temperature shock. When the carrier frame 13 descends to the predetermined position inside the low-temperature chamber, the upright 27 fixed to the top outer wall of the carrier frame 13 slides downward and passes through the mounting hole 29 on the upper partition 12. The sealing plug 28 on the top upright 27 of the carrier frame 13 is embedded into the mounting hole 29 of the partition 12 from above. Its conical surface fits tightly with the conical hole wall of the mounting hole 29 to form a sealing fit, completely blocking the airflow channel between the low-temperature chamber and the fixed chamber. At this time, when the bottom of the support frame 13 contacts the buffer pad 17, the support frame 13 stops descending, and the sealing plug 28 on the top upright 27 is completely embedded in the mounting hole 29 of the partition 12, completing the seal. The cold gas in the low temperature chamber enters the inner cavity of the support frame 13 through the vent 26 on the side wall of the support frame 13, cooling the electronic water pump controller inside the support frame 13. After the low temperature exposure time reaches the predetermined value, the operator drives the support frame 13 upward again through the lifting drive mechanism, so that it quickly returns from the low temperature chamber to the high temperature chamber, completing the second temperature shock. The support frame 13 is raised and lowered repeatedly, so that the electronic water pump controller is alternately exposed between the high temperature chamber and the low temperature chamber, realizing multiple high and low temperature shock cycles. After completing the preset number of temperature shock cycles, the operator moves the carrier frame 13 to the fixed chamber position through the lifting drive mechanism, opens the sealing door 3, and takes out the electronic water pump controller from the hollow inner cavity of the carrier frame 13. Then, the controller is subjected to visual inspection, electrical performance testing and sealing test to evaluate its reliability under the action of thermal expansion and contraction stress.

[0047] A method for using an electronic water pump controller performance testing device includes the following steps: S1. Before the test begins, the operator introduces high-temperature gas into the high-temperature chamber through an external heat source such as a hot air generator to raise the temperature in the high-temperature chamber to the target temperature. At the same time, low-temperature gas is introduced into the low-temperature chamber through an external cold source such as a refrigeration unit to lower the temperature in the low-temperature chamber to the target temperature. Then, the circulation component is started to drive the gas circulation flow in the high-temperature chamber and the low-temperature chamber to make the temperature distribution uniform. S2. Then, the operator opens the sealing door 3 on the box 1, puts the electronic water pump controller to be tested into the hollow inner cavity of the support frame 13, closes the sealing door 3, and forms a sealed environment inside the box 1. S3. Next, the operator drives the support frame 13 to move up and down using the lifting drive mechanism. When the support frame 13 rises to the preset position, the sealing plug 28 on the bottom upright 27 of the support frame 13 is embedded in the mounting hole 29 of the partition 12 to achieve a seal. The hot gas in the high-temperature chamber enters the inner cavity of the support frame 13 through the vent 26 on the side wall of the support frame 13, heating the electronic water pump controller inside the support frame 13. After the high-temperature exposure time reaches the preset value, the operator drives the support frame 13 to move down quickly using the lifting drive mechanism. When the support frame 13 descends to the preset position inside the low-temperature chamber, the support frame... When 13 stops descending, the sealing plug 28 on the top upright 27 is completely embedded in the mounting hole 29 of the partition 12 to complete the seal. The cold gas in the low-temperature chamber enters the inner cavity of the support frame 13 through the vent 26 on the side wall of the support frame 13 to cool the electronic water pump controller inside the support frame 13. After the low-temperature exposure time reaches the predetermined value, the operator drives the support frame 13 to move upward again through the lifting drive mechanism, so that it quickly returns from the low-temperature chamber to the high-temperature chamber. The support frame 13 is raised and lowered repeatedly in this way, so that the electronic water pump controller is alternately exposed between the high-temperature chamber and the low-temperature chamber, realizing multiple high and low temperature impact cycles. S4. After completing the preset number of temperature shock cycles, the operator moves the carrier frame 13 to the fixed chamber position through the lifting drive mechanism, opens the sealing door 3, and takes out the electronic water pump controller from the hollow inner cavity of the carrier frame 13. Then, the controller is inspected for appearance, electrical performance and sealing performance, and its reliability under thermal expansion and contraction stress is evaluated.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A performance testing device for an electronic water pump controller, comprising a housing (1), characterized in that, The bottom outer wall of the box (1) is provided with two supports (2), and the box (1) is also provided with a sealing door (3), and further includes: Lifting drive mechanism: located on both sides of the housing (1); Sealing partition mechanism: located inside the box (1); the sealing partition mechanism includes two partitions (12) and a support frame (13). The two partitions (12) are horizontally arranged inside the box (1). The two partitions (12) divide the box (1) from top to bottom into a high-temperature chamber, a fixed chamber and a low-temperature chamber. The support frame (13) is fixedly connected to the lifting drive mechanism. Multiple vents (26) are opened on both outer walls of the support frame (13). (13) has several uprights (27) on its top and bottom outer walls. The end of the upright (27) away from the bearing frame (13) is provided with a sealing plug (28). Several mounting holes (29) are provided on both partitions (12). The upright (27) is slidably connected in the corresponding mounting hole (29). The sealing plug (28) is a frustum-shaped structure. The mounting hole (29) is a conical hole. The sealing plug (28) can be embedded in the mounting hole (29) and form a sealing fit. Circulation assembly: used to drive the gas circulation flow within the high-temperature chamber and the low-temperature chamber.

2. The electronic water pump controller performance testing device according to claim 1, characterized in that, The sealing plug (28) on the upright (27) located on the top outer wall of the support frame (13) is located in the high temperature chamber, and the sealing plug (28) on the upright (27) located on the bottom outer wall of the support frame (13) is located in the low temperature chamber.

3. The electronic water pump controller performance testing device according to claim 2, characterized in that, The support frame (13) is a frame structure with a hollow inner cavity, and the top inner wall of the high temperature chamber and the bottom inner wall of the low temperature chamber are provided with buffer pads (17).

4. The electronic water pump controller performance testing device according to claim 1, characterized in that, The lifting drive mechanism includes two fixed frames (8) and two second motors (18). The second motors (18) are fixedly mounted on the fixed frames (8). The two fixed frames (8) are respectively fixedly mounted on the outer walls of the two sides of the housing (1). Two connecting shafts (24) are also connected to the inner wall of one side of the housing (1) by bearings. One end of the connecting shaft (24) passes through the inner wall of one side of the housing (1), and the two ends of the connecting shaft (24) are respectively fixedly connected to a first mounting wheel (21) and a second mounting wheel (25). Both the first mounting wheel (21) and the second mounting wheel (25) are provided with toothed rings (23). There are toothed chains (22) between two adjacent first mounting wheels (21) and between two adjacent second mounting wheels (25). The toothed rings (23) mesh with the toothed chains (22) for transmission. The output shaft of the second motor (18) is fixedly connected to one of the second mounting wheels (25).

5. The electronic water pump controller performance testing device according to claim 4, characterized in that, The fixing frame (8) is provided with two connecting plates (15), which penetrate through one side inner wall of the box (1). Each of the two connecting plates (15) is provided with a guide rod (19). A second connecting block (20) is fixedly connected to the toothed chain (22). A first connecting block (16) is slidably connected to the guide rod (19). The first connecting block (16) and the second connecting block (20) are both fixedly connected to the outer wall of the bearing frame (13) on the same side.

6. The electronic water pump controller performance testing device according to claim 5, characterized in that, The two guide rods (19) are symmetrically distributed about the center line of the toothed chain (22).

7. The electronic water pump controller performance testing device according to claim 1, characterized in that, The circulation assembly includes two first motors (9). The side walls of the high-temperature chamber and the low-temperature chamber are respectively connected to a first connecting pipe (6) and a second connecting pipe (7). The high-temperature chamber and the low-temperature chamber are also respectively provided with an upper first air inlet pipe (4) and a second air inlet pipe (5). The interior of the high-temperature chamber and the interior of the low-temperature chamber are both provided with mounting frames (14). The output shaft of the first motor (9) is fixedly connected to a second bevel gear (35). The air inlets of the first connecting pipe (6) and the air inlets of the second connecting pipe (7) are both connected to a connecting frame (31) through bearings. The connecting frame (31) is provided with a mounting rod (32). The mounting rod (32) is provided with a first bevel gear (33). The end of the mounting rod (32) away from the connecting frame (31) is fixedly connected with multiple fan blades (34). The first bevel gear (33) and the second bevel gear (35) mesh with each other.

8. The electronic water pump controller performance testing device according to claim 7, characterized in that, An installation opening is provided on one side of the outer wall of the mounting frame (14). The mounting frame (14) and the inner wall of the box (1) together form an accommodating space with one side opening. The mounting frame (14) is connected to the interior of the chamber through the installation opening. A filter screen (30) is provided on the inner wall of the installation opening.

9. The electronic water pump controller performance testing device according to claim 1, characterized in that, Both the high-temperature chamber and the low-temperature chamber have exhaust pipes (10) connected to one side of their inner walls, and exhaust pipes (10) are equipped with exhaust valves (11).

10. A method of using an electronic water pump controller performance testing device, as described in claim 9, characterized in that, It includes the following steps: S1. Before the test begins, the operator introduces high-temperature gas into the high-temperature chamber through an external heat source such as a hot air generator to raise the temperature in the high-temperature chamber to the target temperature. At the same time, low-temperature gas is introduced into the low-temperature chamber through an external cold source (such as a refrigeration unit) to lower the temperature in the low-temperature chamber to the target temperature. Then, the circulation component is started to drive the gas circulation flow in the high-temperature chamber and the low-temperature chamber to make the temperature distribution uniform. S2. Then, the operator opens the sealing door (3) on the box (1), puts the electronic water pump controller to be tested into the hollow cavity of the support frame (13), closes the sealing door (3), and a sealed environment is formed inside the box (1). S3. Next, the operator drives the support frame (13) to move up and down using the lifting drive mechanism. When the support frame (13) rises to the preset position, the sealing plug (28) on the bottom upright (27) of the support frame (13) is embedded in the mounting hole (29) of the partition (12) to achieve sealing. The hot gas in the high-temperature chamber enters the inner cavity of the support frame (13) through the vent (26) on the side wall of the support frame (13) to heat the electronic water pump controller inside the support frame (13). After the high-temperature exposure time reaches the preset value, the operator drives the support frame (13) to move down quickly using the lifting drive mechanism. When the support frame (13) descends to the preset position inside the low-temperature chamber, the support... The carrier frame (13) stops descending, and the sealing plug (28) on the top upright (27) is completely embedded in the mounting hole (29) of the partition (12) to complete the seal. The cold gas in the low temperature chamber enters the inner cavity of the carrier frame (13) through the vent (26) on the side wall of the carrier frame (13) to cool the electronic water pump controller in the carrier frame (13). After the low temperature exposure time reaches the predetermined value, the operator drives the carrier frame (13) to move upward again through the lifting drive mechanism, so that it quickly returns from the low temperature chamber to the high temperature chamber. The carrier frame (13) is raised and lowered repeatedly in this way, so that the electronic water pump controller is alternately exposed between the high temperature chamber and the low temperature chamber, realizing multiple high and low temperature shock cycles. S4. After completing the preset number of temperature shock cycles, the operator moves the carrier frame (13) to the fixed chamber position through the lifting drive mechanism, opens the sealing door (3), takes out the electronic water pump controller from the hollow inner cavity of the carrier frame (13), and then performs appearance inspection, electrical performance test and sealing test on the controller to evaluate its reliability under thermal expansion and contraction stress.

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