Low-temperature PDU module

Abstract

The invention discloses a low-temperature type PDU module, and relates to the field of PDU modules, the low-temperature type PDU module comprises a box shell and a box cover for sealing a top opening of the box shell, the side wall of the box shell is provided with an air inlet grid opening, a partition plate is arranged in the box shell, the partition plate and the side wall of the box shell are enclosed to form an air cavity with an open top, the side wall of the box shell is provided with an air exhaust grid opening penetrating through the air cavity, and a fan is arranged in the air cavity. An air pipe is arranged along the inner side of the top opening of the box shell and seals the top opening of the air cavity, the bottom of the air pipe is provided with an exhaust opening communicated with the air cavity, the surface of the air pipe is connected with a plurality of deformation air pipes, and ports of the deformation air pipes point to a heating area in the box shell. The PDU heat dissipation box is matched with a high-heating area of a bent deformation air pipe aligned with a PDU, the deformation air pipe is driven by the fan to suck air, heat of a high-heating point is rapidly discharged in a targeted mode, the heat is effectively prevented from being radiated and dispersed in the box shell, and the heat dissipation efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of PDU modules, and in particular to a low-temperature PDU module. Background Art

[0002] The automotive PDU is responsible for the power distribution, management, and protection of the vehicle. The functions of the PDU are improved as the functions of the vehicle are improved. At present, the PDU has been greatly improved in intelligent monitoring such as real-time operation status monitoring, management, and fault self-repair. The heat generated by PDU operation has also increased significantly. The previous active heat dissipation cannot meet the safe operation of the PDU.

[0003] Passive heat dissipation conditions are the basis for meeting the high-load operation of PDU. Air cooling is currently the more common passive heat dissipation mode of PDU. A fan is used to drive convection inside the PDU to accelerate heat dissipation. However, the working components inside the PDU are highly dense, and airflow blockages are easily present between components, making it impossible to achieve the effect of comprehensive convection heat dissipation inside the PDU. Moreover, the high heat sources inside the PDU are generally specific areas such as chips, power modules, and line connection nodes. The overall convection heat dissipation method lacks specificity, the airflow distribution is unreasonable, the heat dissipation efficiency needs to be improved, and the overall energy consumption is high. Summary of the Invention

[0004] In order to make up for the deficiencies of the existing technical problems, the purpose of the present invention is to provide a low-temperature PDU module to solve the problems that the current PDU overall convection air cooling is prone to heat dissipation blind spots, lacks targeted heat dissipation effects, and the heat dissipation efficiency and energy utilization rate need to be improved.

[0005] In order to solve the problems of the prior art, the technical solutions of the present invention are as follows: A low-temperature PDU module includes a box shell and a box cover that closes the top of the box shell. The side walls of the box shell are provided with air inlet grilles, and the inside of the box shell is provided with partitions. The partitions and the side walls of the box shell are enclosed to form an air cavity with an open top. The side walls of the box shell are provided with exhaust grilles that pass through the air cavity. A fan is provided in the air cavity. The fan exhausts air outwards through the exhaust grilles to form a negative pressure in the air cavity. An air duct is provided along the inner side of the top of the box shell. The air duct closes the top of the air cavity. The bottom of the air duct is provided with an exhaust port that passes through the air cavity. A number of deformed air pipes are connected to the surface of the air duct, and the ports of the deformed air pipes point to the heating area in the box shell.

[0006] Preferably, the inner side of the top opening of the box shell has a stepped groove surrounding it, the air duct is made of rubber material, the cross-section of the air duct is rectangular, the air duct is adapted to be embedded in the stepped groove, and the thickness of the air duct is greater than the depth of the stepped groove.

[0007] Preferably, a plurality of openings are evenly opened on the inner side surface of the air duct, a hard ring opening is provided around the opening, and the deformed air duct is plugged into and connected with the opening.

[0008] Preferably, the vacant through-hole can be sealed by inserting a plug or remaining open.

[0009] Preferably, the deformed air pipe includes a rubber tube, the top of the rubber tube has a hard end tube, the hard end tube is plugged into the through port, and metal strips are embedded in the two side walls of the rubber tube. The metal strips fix the bending shape of the rubber tube so that the bottom of the rubber tube points to the heating area inside the box shell.

[0010] Preferably, a plurality of air holes are evenly formed on the surface of the bottom area of ​​the rubber tube.

[0011] Preferably, a metal ring is provided inside the bottom wall of the rubber tube.

[0012] Preferably, the exhaust grille and the air inlet grille are located on the same side wall of the box shell, and the surface of the box shell has a surface groove covering the exhaust grille and the air inlet grille, and a baffle is slidably arranged in the surface groove, and the surface of the baffle has an air guide grille, and the baffle is driven to slide by a telescopic electromagnet to align or misalign the air guide grille with the exhaust grille and the air inlet grille, so as to synchronously open or close the exhaust grille and the air inlet grille.

[0013] Preferably, a micro power generation module is provided on the outside of the fan, the rotating shaft of the fan is connected to the micro power generation module via a belt drive, and the micro power generation module is electrically connected to the telescopic electromagnet.

[0014] Preferably, an embedding groove is provided on the surface of the air inlet grille, a filter screen is flatly arranged in the embedding groove, and the filter screen is located between the air inlet grille and the air guide grille.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention is adapted to the high-heating area of ​​the PDU with bent and deformed air pipes. The fan drives the deformed air pipes to absorb air, thereby achieving targeted and rapid heat discharge from high-heating points, effectively preventing heat from radiating and dissipating inside the box shell, and greatly improving heat dissipation efficiency.

[0016] 2. The present invention opens a passage away from the exhaust grille to form a convection mode between the passage and the exhaust grille, which is used to dissipate heat inside the box shell as a whole. The deformed air pipe is used for targeted heat dissipation at fixed points, making the distribution and utilization of the heat dissipation airflow more reasonable, with high heat dissipation efficiency and high energy utilization rate.

[0017] 3. The present invention controls the lifting of the baffle through the telescopic electromagnet, and controls the opening or closing of the exhaust grille and the air inlet grille following the passive heat dissipation, thereby ensuring the strict effect of the PDU under non-passive heat dissipation. The micro-generation module is driven by the fan to provide power for the operation of the telescopic electromagnet. The operating status of the fan can be monitored to see whether the micro-generation module has electrical energy to feedback the fan, thereby achieving the effect of monitoring the heat dissipation work.

[0018] 4. The present invention sets a window plate on the surface of the partition to block the wind window by elastic twisting. When the heat dissipation air path is blocked, resulting in poor air conduction, the negative pressure in the air cavity gradually increases, and the negative pressure adsorbs the window plate to deflect into the wind cavity to open the wind window, so that the air flow with heat in the box shell passes through the wind window into the wind cavity for emergency heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the air duct of the present invention being assembled on the top opening of the box shell.

[0021] Figure 3 This is a schematic diagram of the air duct connected to the deformed air duct structure of the present invention.

[0022] Figure 4 Schematic diagram of the deformed trachea structure of the present invention.

[0023] Figure 5 This is a schematic diagram of the telescopic electromagnet connecting baffle of the present invention.

[0024] Figure 6 It is a schematic diagram of the baffle installation structure of the present invention.

[0025] Figure 7 This is a schematic diagram of the micro power generation module of the present invention connected to a wind turbine.

[0026] Figure 8 It is a schematic diagram of the window panel installation structure of the present invention.

[0027] Figure 9 Schematic diagram of the control logic of the present invention.

[0028] Figure numerals: 1. Box shell; 11. Step groove; 12. Exhaust grille; 13. Air inlet grille; 14. Surface groove; 15. Embedded groove; 2. Air duct; 21. Through port; 22. Plug cover; 23. Exhaust port; 3. Deformed air pipe; 31. Rubber tube; 32. Hard end tube; 33. Metal strip; 34. Air hole; 35. Metal ring; 4. Box cover; 5. Partition; 51. Wind window; 52. Window panel; 6. Fan; 61. Micro power generation module; 7. Baffle; 71. Air guide grille; 8. Telescopic electromagnet; 9. Filter. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figure 1 、 Figure 6As shown, the low-temperature PDU module includes a square box shell 1 with an open top. The top of the box shell 1 is sealed by a box cover 4 with screws. A partition 5 is provided at a top corner inside the box shell 1. The partition 5 is fixed to the box shell 1 by screws. The partition 5 and the side wall of the box shell 1 enclose a wind cavity with an open top. An exhaust grille 12 and an air inlet grille 13 are provided on one side of the box shell 1. The exhaust grille 12 and the air inlet grille 13 are both vertically arranged strip openings. The exhaust grille 12 is connected to the wind cavity. The fan 6 is installed in the wind cavity. The exhaust end of the fan 6 is facing the exhaust grille 12. A filter 9 is provided at the air inlet grille 13.

[0031] like Figure 1 、 Figure 2 、 Figure 3 As shown, the inner side of the top opening of the box shell 1 has a stepped groove 11 surrounding the whole circumference. The extended profile of the air duct 2 is the same as the profile of the stepped groove 11. The cross-section of the air duct 2 is rectangular, so that the air duct 2 can be adapted to be inserted into the stepped groove 11. The area of ​​one top corner area of ​​the air duct 2 is widened, so that the air duct 2 can be pressed down to close the top opening of the air cavity. An exhaust port 23 is provided at the bottom of the air duct 2, and the exhaust port 23 is connected to the air cavity. A plurality of through-holes 21 are evenly provided along the inner side of the air duct 2, and a hard ring is glued and fixed around the through-hole 21. like Figure 3 、 Figure 4 As shown, there are multiple deformable air tubes 3, and the number of uses can be matched according to the number of high-heat points. The deformable air tube 3 includes a rubber tube 31, and a hard end tube 32 is fixed to the top end of the rubber tube 31. The hard end tube 32 can be adapted and plugged into the through-port 21. Metal strips 33 are embedded in the two side walls of the rubber tube 31. The metal strips 33 are deformable aluminum strips or copper strips. The vacant through-port 21 can be sealed by plugging in an adapted plug cover 22.

[0032] Fit the air duct 2 into the stepped groove 11. Determine the number of deformable air tubes 3 to be used based on the number and distribution of high-heat points within the PDU. Plug the rigid end tube 32 into the opening 21 near the hot spot. Bend the rubber tube 31 so that its bottom end is close to and points toward the hot area. Use a metal strip 33 to maintain the bent shape of the rubber tube 31. Install a deformable air tube 3 for each high-heat point in the PDU. Seal the vacant openings 21 with plugs 22. A temperature sensor is set in the PDU, and the temperature sensor feeds back the internal working temperature of the PDU to the controller. When the temperature is higher than the set value, the passive heat dissipation mode is activated, and the controller turns on the fan 6 to form a negative pressure in the air cavity, so that a negative pressure is formed in the air duct 2 and each deformed air duct 3. The bottom of the deformed air duct 3 sucks away the heat generated by the high heating point along with the air flow. The air flow is introduced into the air cavity through the exhaust port 23 and discharged from the exhaust grille 12, so that the heat of the high heating point can be quickly discharged in a targeted manner, and the heat can be effectively prevented from radiating and dissipating in the box shell 1.

[0033] The external air flow is introduced into the box shell 1 through the air inlet grille 13 to balance the air pressure, and the incoming air is filtered by the filter 9. The vacant opening 21 in the area away from the air inlet grille 13 does not need to be sealed with the plug cover 22, so that a convection mode is formed between the opening 21 and the air inlet grille 13, which is used to exchange air flow and dissipate heat inside the box shell 1 as a whole.

[0034] like Figure 4 As shown, a metal ring 35 is provided inside the bottom wall of the rubber tube 31. The metal ring 35 is made of an aluminum bar or a copper bar. The metal ring 35 can be squeezed and deformed according to the structural distribution of the high-heating points to adjust the contour or size of the bottom of the rubber tube 31 so that it extends more accurately to the corresponding hot spots. A plurality of air holes 34 are evenly provided on the surface of the bottom area of ​​the rubber tube 31 to increase the air suction range of the bottom of the rubber tube 31, which can accelerate the heat to be sucked away with the air flow.

[0035] The air duct 2 is made of rubber material, and the thickness of the air duct 2 is greater than the depth of the stepped groove 11. When the box cover 4 is assembled to seal the top of the box shell 1, the air duct 2 is squeezed into the stepped groove 11 through the box cover 4, so that the air duct 2 produces a sealing ring effect, thereby sealing the connection between the box shell 1 and the box cover 4 without the need for an additional sealing ring.

[0036] like Figure 5 、 Figure 6 As shown, the exhaust grille 12 and the air inlet grille 13 are located on the same side wall of the box shell 1. The inner surface of the box shell 1 has a surface groove 14 covering the exhaust grille 12 and the air inlet grille 13. The baffle 7 slides downward from the top and is inserted into the surface groove 14. The surface of the baffle 7 has an air guide grille 71. The air guide grille 71 is a vertically arranged strip opening. The surface of the air inlet grille 13 is provided with an embedded groove 15. The filter screen 9 is flatly arranged in the embedded groove 15. The filter screen 9 is located between the air inlet grille 13 and the air guide grille 71. When replacing the filter screen 9, the baffle 7 needs to be pulled out from the surface groove 14.

[0037] The telescopic electromagnet 8 is installed on the side of the partition 5. The telescopic end of the telescopic electromagnet 8 is connected to the baffle 7 through the connecting plate. The telescopic electromagnet 8 telescopes the empty baffle 7 and can be lifted and slid in the surface groove 14 to align or misalign the air guide grille opening 71 with the exhaust grille opening 12 and the air inlet grille opening 13.

[0038] When passive air cooling is performed, the telescopic electromagnet 8 is extended to control the baffle 7 to rise, so that the air guide grille 71 is aligned with the air inlet grille 13 and the exhaust grille 12, and the air inlet grille 13 and the exhaust grille 12 are opened to allow air to enter and exit. When non-passive heat dissipation is performed, the telescopic electromagnet 8 is powered off to cause the baffle 7 to descend, and the air guide grille 71 is misaligned with the air inlet grille 13 and the exhaust grille 12, so that the air inlet grille 13 and the exhaust grille 12 are blocked to prevent dust or moisture from entering the box shell 1.

[0039] like Figure 7 、 Figure 9As shown, a micro-power generation module 61 is installed on the outside of the fan 6. The micro-power generation module 61 is a rotating power generation module. The rotating shaft of the fan 6 is connected to the micro-power generation module 61 through a belt drive. The fan 6, the telescopic electromagnet 8, and the micro-power generation module 61 are all connected to the controller. The telescopic electromagnet 8 has two power supply modes. The active power supply mode is that the micro-power generation module 61 is electrically connected to the telescopic electromagnet 8. The passive power supply mode is that the PDU power supply line supplies power to the telescopic electromagnet 8 through the controller. The controller is also connected to a prompt terminal, which can use an indicator light, a speaker or a display panel.

[0040] When passive heat dissipation is implemented, the controller controls the operation of the fan 6, and the fan 6 drives the micro-generation module 61 to operate and supply power to the telescopic electromagnet 8, so that the telescopic electromagnet 8 extends and drives the baffle 7 to rise, and opens the air inlet grille 13 and the exhaust grille 12 to conduct airflow and dissipate heat. The micro-generation module 61 operates and transmits an electrical signal to the controller, indicating that the fan 6 is operating normally. If the fan 6 fails and cannot drive the micro-generation module 61 to operate, the micro-generation module 61 cannot send an electrical signal to the controller. The controller determines that the fan 6 has failed, and the controller then passively supplies power to the telescopic electromagnet 8, so that the telescopic electromagnet 8 drives the baffle 7 to move, and opens the air inlet grille 13 and the exhaust grille 12 to compensate for heat dissipation. At the same time, the controller sends a fault prompt to the prompt terminal to facilitate timely maintenance of the fan 6.

[0041] like Figure 5 、 Figure 8 As shown, a plurality of wind windows 51 are provided on the surface of the partition 5 at a position corresponding to the air inlet surface of the fan 6, and a window plate 52 is elastically rotated and installed in the wind window 51 by a torsion spring. When the heat dissipation air path is unobstructed, the elastic force causes the window plate 52 to close the wind window 51, and keeps the air inlet energy introduced into the air cavity through the deformed air duct 3, the air duct 2, and the exhaust port 23. If the deformed air duct 3 and the air duct 2 are blocked, resulting in poor air conduction, the negative pressure in the air cavity gradually increases, and the negative pressure adsorbs the window plate 52 to deflect into the air cavity to open the wind window 51, so that the airflow with heat in the box shell 1 enters the air cavity through the wind window 51 for emergency heat dissipation.

[0042] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A low-temperature PDU module, comprising: A box shell (1) and a box cover (4) closing the top opening of the box shell (1), the side wall of the box shell (1) is provided with an air inlet grille (13), and a partition (5) is provided inside the box shell (1), characterized in that the partition (5) and the side wall of the box shell (1) enclose a wind cavity with an open top, the side wall of the box shell (1) has an exhaust grille (12) passing through the wind cavity, a fan (6) is provided in the wind cavity, and the fan (6) exhausts air outward through the exhaust grille (12) to form a negative pressure in the wind cavity, an air duct (2) is provided along the inner side of the top opening of the box shell (1), the air duct (2) closes the top opening of the wind cavity, the bottom of the air duct (2) has an exhaust port (23) passing through the wind cavity, and the surface of the air duct (2) is connected to a plurality of deformed air ducts (3), and the ends of the deformed air ducts (3) point to the heating area in the box shell (1).

2. The low-temperature PDU module according to claim 1, characterized in that: The inner side of the top opening of the box shell (1) is provided with a stepped groove (11) which surrounds the box shell. The air duct (2) is made of rubber material. The cross section of the air duct (2) is rectangular. The air duct (2) is adapted to be embedded in the stepped groove (11). The thickness of the air duct (2) is greater than the depth of the stepped groove (11).

3. The low-temperature PDU module according to claim 2, characterized in that: The inner side surface of the air duct (2) is evenly provided with a plurality of openings (21), and a hard ring opening is provided around the openings (21). The deformed air duct (3) is plugged into and connected with the openings (21).

4. The low-temperature PDU module according to claim 3, characterized in that: The vacant through-port (21) can be sealed by inserting a plug cover (22) or kept open.

5. The low-temperature PDU module according to claim 3, characterized in that: The deformed air pipe (3) comprises a rubber tube (31), the top end of the rubber tube (31) is provided with a hard end tube (32), the hard end tube (32) is plugged into the through opening (21), and metal strips (33) are embedded in the two side walls of the rubber tube (31), and the metal strips (33) fix the bending shape of the rubber tube (31) so that the bottom opening of the rubber tube (31) points to the heating area in the box shell (1).

6. The low-temperature PDU module according to claim 5, characterized in that: A plurality of air holes (34) are evenly formed on the surface of the bottom area of ​​the rubber tube (31).

7. The low-temperature PDU module according to claim 5, characterized in that: A metal ring (35) is provided inside the bottom wall of the rubber tube (31).

8. The low-temperature PDU module according to claim 1, characterized in that: The exhaust grille (12) and the air inlet grille (13) are located on the same side wall of the box shell (1); the surface of the box shell (1) has a surface groove (14) covering the exhaust grille (12) and the air inlet grille (13); a baffle (7) is slidably arranged in the surface groove (14); the surface of the baffle (7) has an air guide grille (71); the baffle (7) is driven to slide by the telescopic electromagnet (8) so that the air guide grille (71) is aligned or misaligned with the exhaust grille (12) and the air inlet grille (13), so as to synchronously open or close the exhaust grille (12) and the air inlet grille (13).

9. The low-temperature PDU module according to claim 8, characterized in that: A micro power generation module (61) is provided on the outside of the fan (6), the rotating shaft of the fan (6) is connected to the micro power generation module (61) via a belt drive, and the micro power generation module (61) is electrically connected to the telescopic electromagnet (8).

10. The low-temperature PDU module according to claim 8, characterized in that: The surface of the air inlet grille (13) is provided with an embedding groove (15), and a filter screen (9) is flatly arranged in the embedding groove (15). The filter screen (9) is located between the air inlet grille (13) and the air guide grille (71).

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