Memory alloy pneumatic controller with enhanced heat dissipation

Abstract

The invention provides a memory alloy pneumatic controller capable of enhancing heat dissipation, which comprises a shell, an air inlet, an air outlet, a heat dissipation device and a memory alloy pneumatic control device, and is characterized in that an accommodating cavity is formed in the shell; the valve body assembly is arranged in the containing cavity and provided with an inflation inlet and a plurality of independent ventilation openings, and each ventilation opening is correspondingly provided with a valve element unit; each valve element unit is connected with an independent memory alloy wire, and the memory alloy wires are configured to provide deflection force for the valve element units through thermal actuation. The air exhaust device is arranged in the containing cavity, the air inlet end of the air exhaust device communicates with the containing cavity, and the air outlet end of the air exhaust device faces the air outlet; an air inducing surface is formed on the outer wall, corresponding to the air outlet, of the shell, and air outlet holes are formed in the shell in the area of the air inducing surface; the air exhaust device sucks air in the containing cavity through the air inlet end and exhausts the air through the air outlet end, and the exhausted air flows along the air inducing face so that pressure difference can be formed on the two sides of the air outlet hole. According to the controller provided by the invention, hot air in the shell can be sucked by utilizing the coanda effect, and active heat dissipation is realized.

Description

Technical Field

[0001] This invention belongs to the field of vehicle seat accessories technology, specifically relating to a shape memory alloy pneumatic controller with enhanced heat dissipation. Background Technology

[0002] With the continuous upgrading of intelligent and comfort features in automotive cabins, seat massage and support adjustment functions have become important components for enhancing the driving and riding experience. In long-distance driving or extended passenger journeys, seat massage systems can effectively relieve back muscle fatigue and reduce the risk of drowsy driving, while seat support adjustment systems ensure better seat support and comfort. Therefore, these two functions are widely used in high-end and mid-to-high-end models.

[0003] As the core actuator of the seat massage and support adjustment system, the pneumatic controller is responsible for the precise control of the airflow. Its operational stability directly affects the continuity and reliability of the massage and support adjustment functions. Most existing pneumatic controllers use electronic control to drive the valve core unit, enabling independent control of multiple air supply ports. However, during prolonged operation, the internal drive components of such controllers generate significant heat due to frequent operation. Limited by their compact internal structure and poor heat dissipation paths, heat easily accumulates within the housing, leading to prolonged cooling and recovery time for the drive components. In severe cases, this can even cause controller malfunctions or failures, affecting the normal use of the massage and support adjustment functions. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present invention provides a shape memory alloy pneumatic controller with enhanced heat dissipation, comprising: The housing has an internal cavity and an air inlet and an air outlet. A valve body assembly is disposed within the receiving cavity. The valve body assembly is provided with an air inlet and multiple independent air vents. Each air vent is correspondingly provided with a valve core unit. Each valve core unit is connected to an independent shape memory alloy wire, which is configured to provide a deflection force to the valve core unit through thermal actuation. An exhaust device is provided inside the receiving cavity, with its air inlet connected to the receiving cavity and its air outlet facing the air outlet. The outer wall of the housing forms an air-guiding surface corresponding to the air outlet, and the housing located in the air-guiding surface area is provided with an air outlet hole; The exhaust device draws gas from the accommodating cavity into the exhaust device through the air inlet and discharges it through the air outlet. The discharged gas flows along the air intake surface to create a pressure difference on both sides of the air outlet.

[0005] According to the technical solution provided by the present invention, an air guide wall is provided on the air intake surface, and the air guide wall is used to guide the airflow discharged from the air outlet to the air outlet hole.

[0006] According to the technical solution provided by the present invention, multiple air guide walls are provided, and the multiple air guide walls are arranged along a first direction and extend along a second direction, the second direction being the air outlet direction of the air outlet end, the first direction being perpendicular to the second direction and parallel to the air intake surface; an air guide channel is formed between adjacent air guide walls, and each air guide channel is provided with at least one air outlet hole.

[0007] According to the technical solution provided by the present invention, a protruding guide surface is provided on the air-guiding surface corresponding to each of the air-guiding channels, and the guide surface connects two adjacent air-guiding walls; the guide surface is located on the side of the air outlet away from the air outlet and smoothly transitions with the edge of the air outlet.

[0008] According to the technical solution provided by the present invention, a protruding guide surface is provided on the air-guiding surface corresponding to each of the air-guiding channels, and the guide surface connects two adjacent air-guiding walls; the guide surface is located on the side of the air outlet near the air outlet and smoothly transitions with the edge of the air outlet.

[0009] According to the technical solution provided by the present invention, at least one baffle is provided on the air guide surface corresponding to each of the air guide channels, and a gap is provided between the baffle and the air guide wall; the baffle is provided on the side of the air outlet near the air outlet, and the windward surface is an arc surface with an opening away from the air outlet; at least one air replenishment hole is provided in the housing between the air outlet and the baffle.

[0010] According to the technical solution provided by the present invention, a circuit board is also provided inside the receiving cavity, and an electronic control module for controlling the power supply of the shape memory alloy wire is integrated on the circuit board, and an air passage is formed on the circuit board.

[0011] According to the technical solution provided by the present invention, a guide surface is provided at one end of the edge of the air-guiding surface area near the exhaust device, and the guide surface guides the interior of the receiving cavity.

[0012] According to the technical solution provided by the present invention, the housing includes a first side shell and a second side shell that are detachably connected, and the air outlet and the air intake surface are disposed on the second side shell.

[0013] According to the technical solution provided by the present invention, a plurality of air inlets are provided on both the first side shell and the second side shell, and the plurality of air inlets and the plurality of shape memory alloy wires are arranged along the second direction.

[0014] Compared with existing technologies, the advantages of this invention are as follows: By setting an exhaust device inside the housing, and cooperating with the air inlet and outlet on the side wall, an active heat dissipation airflow channel is formed, which can force the heat accumulated inside the housing to be discharged, effectively avoiding the problem of heat accumulation in the shape memory alloy wires due to frequent power switching; at the same time, the housing forms an air intake surface corresponding to the air outlet, and the high-speed airflow discharged by the exhaust device flows along the air intake surface using the Coanda effect, creating a local low-pressure zone at the air outlet position, thereby guiding the hot air inside the housing to be drawn out more efficiently, enhancing the internal gas exchange efficiency. This structure, while ensuring that the air supply port of each shape memory alloy wire can be independently controlled to open and close, achieves efficient heat dissipation of the drive components, ensuring that the shape memory alloy wires can cool and recover quickly, thereby ensuring the stability and reliability of the pneumatic controller during long-term operation. Attached Figure Description

[0015] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the shape memory alloy pneumatic controller with enhanced heat dissipation provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of another shape memory alloy pneumatic controller in Example 1; Figure 3 for Figure 1 The diagram shows a top view of the shape memory alloy pneumatic controller. Figure 4 for Figure 3 A cross-sectional view of section AA in the shape memory alloy pneumatic controller shown. Figure 5 for Figure 3 A schematic cross-sectional view of the shape memory alloy pneumatic controller at point BB. Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 for Figure 1 The exploded view of the shape memory alloy pneumatic controller shown. Figure 8 This is a schematic diagram of the structure of the shape memory alloy pneumatic controller with enhanced heat dissipation provided in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the structure of the shape memory alloy pneumatic controller with enhanced heat dissipation provided in Embodiment 3 of the present invention.

[0016] The text labels in the figure represent: 1. Shape memory alloy wire; 2. Housing; 3. Air inlet; 4. Air outlet; 5. Exhaust device; 6. Receiving cavity; 7. Air outlet; 8. Air intake surface; 9. Air guide wall; 10. Guide curved surface; 11. Baffle wall; 12. Air replenishment hole; 13. Guide surface; 14. First side shell; 15. Second side shell; 16. Air duct; 17. Circuit board; 18. Air passage hole. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Example 1 As mentioned in the background section regarding technical issues, please refer to... Figures 1-7 This embodiment proposes a shape memory alloy pneumatic controller with enhanced heat dissipation, comprising: The housing 2 has an internal cavity 6 and an air inlet 3 and an air outlet 4. A valve body assembly is disposed within the receiving cavity 6. The valve body assembly is provided with an air inlet and multiple independent air vents. Each air vent is provided with a valve core unit. Each valve core unit is connected to an independent shape memory alloy wire 1, which is configured to provide a deflection force to the valve core unit through thermal actuation. An exhaust device 5 is provided inside the receiving cavity 6. The air inlet of the exhaust device 5 is connected to the receiving cavity 6, and the air outlet faces the air outlet 4. The outer wall of the housing 2 corresponding to the air outlet 4 forms an air-guiding surface 8, and the housing 2 located in the area of ​​the air-guiding surface 8 is provided with an air outlet 7; The exhaust device 5 draws the gas from the receiving cavity 6 into the exhaust device 5 through the air inlet and discharges it through the air outlet. The discharged gas flows along the air intake surface 8 to create a pressure difference on both sides of the air outlet 7.

[0020] Specifically, such as Figures 1 to 7As shown, the shape memory alloy pneumatic controller is suitable for seats with massage or support adjustment functions, and includes a housing 2 and a valve body assembly. The housing 2 has a hollow interior forming a receiving cavity 6, and the outer wall of the housing 2 has an air inlet 3 and an air outlet 4 communicating with the receiving cavity 6. The valve body assembly is located inside the receiving cavity 6 and has an inflation port and multiple independent vents. Each vent includes an air inlet for a gas-using component and a vent. The air inlet for the gas-using component is used to connect to an external gas-using component, and the vent is connected to the ambient atmosphere to release air from the gas-using component. Each vent is equipped with a valve core unit, which mainly includes a valve core for independently controlling the on / off state between each vent and the inflation port. Specifically, for the massage function, the valve core simultaneously controls the on / off state between the air inlet and inflation port of the air-using component, as well as between the deflation port and the air inlet of the air-using component. That is, if the air inlet and inflation port of the air-using component are connected, the deflation port is blocked from the air inlet, allowing the air-using component to be inflated; if the air inlet and inflation port are blocked, the deflation port is connected to the air inlet, allowing the air-using component to be deflated. For the support function, valve cores are provided for the air inlet and deflation ports of the air-using component respectively, independently controlling the inflation and deflation of the air-using component. Each valve core unit is connected to an independent shape memory alloy wire 1, which is located inside the housing 2. During operation, the shape memory alloy wire 1 heats up and contracts when energized, driving the valve core unit to move; after power is cut off, the shape memory alloy wire 1 cools down and restores its deformation, and the valve core unit resets. Because the shape memory alloy wire 1 generates a large amount of heat during frequent power-on and power-off processes, if this heat accumulates in the receiving cavity 6, it can easily lead to poor heat dissipation of the shape memory alloy wire 1, preventing it from elongating and resetting in time, and even affecting its service life. Therefore, this embodiment incorporates a heat dissipation structure on the housing 2.

[0021] An exhaust device 5 is installed inside the receiving cavity 6. The air inlet of the exhaust device 5 is connected to the receiving cavity 6, and the air outlet faces the air outlet 4. When the exhaust device 5 is running, it discharges the hot air inside the housing 2 from the air outlet 4, while external cold air is introduced into the receiving cavity 6 through the air inlet 3, forming an active heat dissipation airflow channel, thereby carrying away the heat generated by the shape memory alloy wire 1 during operation. In this embodiment, the exhaust device 5 is a fan, which draws in air from the top and bottom sides and exhausts air laterally. Figure 6 As shown.

[0022] To further improve heat dissipation efficiency, an air-guiding surface 8 is formed on the outer wall of the housing 2 corresponding to the air outlet 4, and an air outlet 7 is provided on the housing 2 located in the area of ​​the air-guiding surface 8. The gas discharged by the exhaust device 5 flows along the air-guiding surface 8, and the high-speed airflow adheres to the surface of the air-guiding surface 8 by utilizing the Coanda effect, creating a local low-pressure area at the air outlet 7, thereby forming a pressure difference with the cavity 6. This pressure difference can guide the hot air inside the housing 2 to be drawn out through the air outlet 7, further enhancing the gas exchange efficiency inside the housing 2 and ensuring that the shape memory alloy wire 1 can cool and recover quickly. In this embodiment, the air outlet 7 is configured as follows: Figure 1 The shape shown can also be modified by lengthening the vent 7 to the size shown. Figure 2 The shape shown further improves heat exchange efficiency by increasing the area of ​​the pressure differential region.

[0023] Furthermore, the air intake surface 8 is provided with a guide wall 9, which is used to guide the airflow discharged from the air outlet to the air outlet 7, reduce the lateral diffusion of the airflow, and make the airflow flow more concentrated along the surface of the air intake surface 8, thereby enhancing the Coanda effect. Multiple guide walls 9 can be provided, and two adjacent guide walls 9 can be parallel to each other, such as in a U-shape, or they can be at a certain angle, such as in a V-shape.

[0024] Furthermore, in this embodiment, as Figures 1-3 As shown, multiple air guide walls 9 on the air intake surface 8 are arranged along a first direction and extend along a second direction. The second direction is the air outlet direction, and the first direction is perpendicular to the second direction and parallel to the air intake surface 8. In other words, the air guide walls 9 extend along the air outlet direction and are spaced apart in a direction perpendicular to the air outlet direction.

[0025] Air ducts 16 are formed between adjacent air guide walls 9, and each air guide duct 16 has at least one air outlet 7. The high-speed airflow discharged from the exhaust device 5 flows out through the air outlet 4 and is constrained within each air guide duct 16 under the guidance of the air guide walls 9, flowing in the second direction, thereby enhancing the Coanda effect by concentrating the airflow. At the same time, since each air guide duct 16 has an air outlet 7, the airflow within the air guide duct 16 can form a more stable low-pressure zone in the local area when it flows through the air outlet 7, thereby more efficiently drawing hot air from inside the housing 2 and discharging it through the air outlet 7, further improving the heat dissipation effect.

[0026] Furthermore, such as Figures 1-3 As shown, each air duct 16 on the air intake surface 8 has a protruding guide surface 10. The guide surface 10 connects two adjacent air guide walls 9, that is, the guide surface 10 spans above the air guide duct 16, smoothly connecting the air guide walls 9 on both sides.

[0027] In this embodiment, the guide surface 10 is located on the side of the air outlet 7 away from the air outlet 4, and smoothly transitions with the edge of the air outlet 7. Specifically, along the airflow direction, the air outlet 7 is located at the front end of the guide surface 10, that is, the high-speed airflow discharged from the exhaust device 5 first flows through the air outlet 7, and then flows through the guide surface 10. When the high-speed airflow discharged from the exhaust device 5 flows along the air intake surface 8, a local low-pressure area is formed at the air outlet 7 due to the Coanda effect, which draws the hot air inside the housing 2 out through the air outlet 7. At this time, the airflow direction discharged from the air outlet 7 is approximately perpendicular to the air intake surface 8, and intersects with the main airflow flowing along the air intake surface 8. When the two airflows with mutually perpendicular directions intersect at the air outlet 7, turbulence or accumulation is easily generated, affecting the heat dissipation efficiency. The guide surface 10 is located at the rear end of the air outlet 7. Its arc structure smoothly transitions with the edge of the air outlet 7, which can smoothly guide the two converging airflows to the surface of the air intake surface 8, allowing them to flow smoothly downstream along the guide surface 10. This avoids the accumulation or turbulence of airflow at the air outlet 7, thereby maintaining a stable low-pressure zone at the air outlet 7 and ensuring that the hot air inside the housing 2 is continuously and efficiently drawn out.

[0028] Furthermore, such as Figure 5 and Figure 7 As shown, the exhaust device 5 and the air outlet 4 are set at one end of the shape memory alloy wire 1, and the air inlet 3 is set at the other end of the shape memory alloy wire 1.

[0029] Specifically, the exhaust device 5 and the air outlet 4 are located at the same end of the housing 2 near the shape memory alloy wire 1, while the air inlet 3 is located on the side wall of the housing 2 away from the exhaust device 5, corresponding to the other end of the shape memory alloy wire 1. This arrangement allows external cold air to enter the housing 2 through the air inlet 3 and flow along the length of the shape memory alloy wire 1 across its entire surface, carrying away the heat generated during operation. Finally, the air is exhausted from the housing 2 through the exhaust device 5 and the air outlet 4. This directional airflow path design ensures that the cold air forms a continuous flow within the housing 2, avoiding airflow short-circuiting and ensuring that each shape memory alloy wire 1 receives sufficient cooling, thereby effectively improving heat dissipation efficiency.

[0030] Furthermore, such as Figures 1-3 As shown, the end of the air guide wall 9 near the air outlet 4 is curved; the air guide wall 9 and the air intake surface 8 and the guide curved surface 10 are smoothly transitioned by rounded corners.

[0031] Specifically, the end of the air guide wall 9 facing the air outlet 4, i.e., the windward end of the air guide wall 9, is designed as a curved structure, which extends in a streamlined manner along the airflow direction. When the high-speed airflow discharged from the exhaust device 5 flows out through the air outlet 4 and enters each air guide duct 16, the windward end of the curved surface can effectively reduce the airflow impact resistance, allowing the airflow to smoothly enter the air guide duct 16 formed between adjacent air guide walls 9, avoiding the generation of vortices or energy loss at the front end of the air guide wall 9, and ensuring that the airflow propagates downstream along the air guide duct 16 with low flow resistance.

[0032] Meanwhile, the connections between the air guide wall 9 and the air intake surface 8, as well as between the air guide wall 9 and the guide surface 10, are all smoothly transitioned with rounded corners. Specifically, the root of the air guide wall 9 and the air intake surface 8 are connected with rounded corners, eliminating sharp corners; the side of the air guide wall 9 and the guide surface 10 are also connected with rounded corners, so that the air guide wall 9 and the guide surface 10 form a continuous curved surface profile. This smooth transition structure reduces the frictional resistance of the airflow when flowing at the root and side of the air guide wall 9, avoiding the generation of eddies; on the other hand, it allows the airflow entering the air guide duct 16 to flow smoothly along the extension direction of the air guide wall 9, maintaining the stability of the airflow and the wall adhesion effect, thereby ensuring that a stable low-pressure zone can be formed at the air outlet 7, ensuring efficient extraction of hot air inside the shell 2.

[0033] Furthermore, such as Figure 4 , Figure 5 and Figure 7 As shown, a circuit board 17 is also provided inside the receiving cavity 6. An electronic control module (not shown in the figure) is integrated on the circuit board 17. The electronic control module is electrically connected to each shape memory alloy wire 1 and is used to control the on / off state of the corresponding shape memory alloy wire 1 according to massage control commands or seat support function related control commands. The active heat dissipation airflow channel in this embodiment not only removes heat from the shape memory alloy wire 1 but also effectively dissipates heat from other heat-generating components such as the circuit board 17, improving the overall working stability of the machine. In addition, multiple air vents 18 are provided on the circuit board 17 to enhance airflow.

[0034] Furthermore, such as Figure 5 As shown, a guide surface 13 is provided at the edge of the air intake surface 8 area near the exhaust device 5, and the guide surface 13 guides the air intake surface 8 into the cavity 6.

[0035] Specifically, the guide surface 13 is located at the inlet end of the air intake surface 8, that is, at the position where the air intake surface 8 and the outlet end of the exhaust device 5 meet. The guide surface 13 extends inclinedly towards the interior of the housing 2, forming a smooth inclined or arc-shaped structure. When the high-speed airflow discharged from the exhaust device 5 flows towards the guide surface 13, under the action of the guide surface 13, the airflow is divided into two parts: one part of the airflow is guided along the inclined surface of the guide surface 13 to the surface of the air intake surface 8 to flow along the air intake surface 8, utilizing the Coanda effect to form a local low-pressure area at the air outlet 7, drawing in hot air from inside the housing 2; the other part of the airflow enters the interior of the housing 2 through the guiding action of the guide surface 13, such as... Figure 5 As indicated by the middle arrow, this airflow can increase the gas flow rate inside the housing 2, enhance the blowing and heat dissipation effect on heat-generating components such as the shape memory alloy wire 1 and the circuit board, and further improve the overall heat dissipation efficiency.

[0036] Furthermore, in practical applications, the position of the air intake surface 8 can be adaptively adjusted according to heat dissipation requirements. When it is necessary to use the airflow discharged from the exhaust device 5 to enhance the Coanda effect at the air intake surface 8, the air intake surface 8 can be set to face the air outlet of the exhaust device 5, so that the guide surface 13 and the air intake surface 8 are smoothly connected, thereby guiding all the airflow to the surface of the air intake surface 8 and concentrating to improve the suction efficiency at the air outlet 7. Through the diversion and guiding effect of the guide surface 13, the airflow is flexibly distributed, taking into account both the blowing and heat dissipation of the heat-generating elements inside the housing 2 and the enhanced suction of the low-pressure area at the air outlet 7, further optimizing the heat dissipation effect.

[0037] Furthermore, such as Figure 7 As shown, the housing 2 includes a first side shell 14 and a second side shell 15 that are detachably connected, and the air outlet 4 and the air intake surface 8 are provided on the second side shell 15.

[0038] Specifically, the housing 2 consists of two parts: a first side shell 14 and a second side shell 15. These two parts are detachably connected by snap-fit ​​mechanisms such as clips and screws, facilitating the installation, maintenance, and replacement of internal components. The air outlet 4 and the air intake surface 8 are integrally formed or fixedly mounted on the second side shell 15, corresponding to the air outlet end of the exhaust device 5. Since the air outlet 4 and the air intake surface 8 are both integrated into the second side shell 15, during assembly, simply snapping the first side shell 14 and the second side shell 15 together ensures the relative positional accuracy of the air intake surface 8 and the air outlet end of the exhaust device 5, guaranteeing accurate airflow along the air intake surface 8. Simultaneously, the detachable housing structure facilitates the inspection or replacement of the internal shape memory alloy wire 1, valve core unit, and exhaust device 5, improving the product's maintainability.

[0039] Furthermore, such as Figure 7 As shown, multiple air inlets 3 are provided on both the first side shell 14 and the second side shell 15, and the multiple air inlets 3 and multiple shape memory alloy wires 1 are arranged along the second direction.

[0040] Specifically, multiple air inlets 3 are respectively provided on the first side shell 14 and the second side shell 15, and the air inlets 3 are evenly distributed on both side walls of the shell 2. Simultaneously, multiple shape memory alloy wires 1 are arranged parallel to each other along a second direction inside the shell 2, and the multiple air inlets 3 are also arranged correspondingly along the second direction. This arrangement ensures that the distribution direction of the air inlets 3 is consistent with the arrangement direction of the shape memory alloy wires 1. After external cold air enters the shell 2 through each air inlet 3, it can form an air intake distribution covering the entire array of shape memory alloy wires 1 along the second direction within the shell 2, achieving omnidirectional coverage of the air intake position and ensuring that each shape memory alloy wire 1 receives sufficient cooling airflow. At the same time, the air inlets 3 on both side shell walls increase the air intake area and further improve the heat dissipation airflow. As a preferred embodiment, each air inlet 3 can be positioned one-to-one with each shape memory alloy wire 1 to further enhance the directional cooling effect on each shape memory alloy wire 1. This structural layout is reasonable and compact, facilitating processing, manufacturing, and assembly, and is beneficial to improving product production efficiency and quality stability.

[0041] Example 2 Based on Embodiment 1 above, this embodiment provides another shape memory alloy pneumatic controller with enhanced heat dissipation. The contents that are the same as in Embodiment 1 will not be repeated here; the differences are as follows: like Figure 8 As shown, at least one baffle wall 11 is also provided on the air-guiding surface 8 corresponding to each air guide duct 16. There is a gap between the baffle wall 11 and the air guide wall 9, that is, the baffle wall 11 is independently set in the air guide duct 16, and its two sides are kept at a certain distance from the air guide wall 9, forming a lateral channel for airflow to pass through.

[0042] The baffle 11 is located on the side of the air outlet 7 near the air outlet 4, and its windward surface is an arc-shaped surface with an opening away from the air outlet 4. Specifically, along the airflow direction, the baffle 11 is located at the front end of the air outlet 7, and its windward surface facing the air outlet 4 has an arc-shaped concave structure. When the high-speed airflow discharged from the exhaust device 5 flows along the air intake surface 8, it first reaches the baffle 11. The airflow is split at the windward side of the arc-shaped baffle 11, passes through the gaps between the two sides of the baffle 11 and the air guide wall 9, and continues to flow towards the air outlet 7 along the air guide channel 16 under the constraint of the air guide wall 9. The baffle 11 ensures that the airflow is split and re-converged before flowing through the air outlet 7, which is beneficial for a more uniform airflow distribution.

[0043] At least one air inlet 12 is provided on the air intake surface 8 between the air outlet 7 and the baffle wall 11. The air inlet 12 penetrates the side wall of the housing 2 in the area of ​​the air intake surface 8, connecting the outside of the housing 2 with the air guide duct 16. When the exhaust device 5 continuously exhausts air, the internal pressure of the housing 2 decreases. The air inlet 12, as an additional air intake channel, can introduce air from outside the housing 2 into the air guide duct 16 to supplement the total airflow required for heat dissipation. The air inlet 12 is located between the air outlet 7 and the baffle wall 11. After the airflow discharged by the exhaust device 5 is diverted by the baffle wall 11, an airflow channel is formed in the area between the leeward side of the baffle wall 11 and the air outlet 7. The airflow in this area will not interfere with the air intake of the air inlet 12, ensuring that the air inlet 12 can stably introduce external air. Through the coordinated action of the baffle 11 guiding and diverting the airflow, the exhaust port 7 drawing out heat, and the supplementary air port 12 providing auxiliary air supply, while ensuring that the exhaust port 7 stably forms a low-pressure zone to draw out hot air from inside the shell 2, the supplementary air port 12 introduces external airflow to supplement the heat dissipation medium, further optimizing the airflow circulation path and improving the overall heat dissipation efficiency.

[0044] Example 3 Based on the above embodiment 1, this embodiment provides another shape memory alloy pneumatic controller with enhanced heat dissipation. The same content as in embodiment 1 will not be repeated. The difference is that the guide surface 10 is located on the side of the air outlet 7 near the air outlet 4.

[0045] Specifically, such as Figure 9 As shown, in this embodiment, the guide surface 10 is located at the front end of the air outlet 7 along the airflow direction. That is, the high-speed airflow discharged from the exhaust device 5 first flows through the guide surface 10 and then through the air outlet 7. The guide surface 10 has an arc-shaped convex structure, and its arc surface bends towards the air intake surface 8. It can pre-compress and guide the airflow flowing along the air intake surface 8, so that the airflow gradually adheres to the surface of the air intake surface 8 when it flows through the guide surface 10, thereby enhancing the wall adhesion effect of the airflow. When the high-speed airflow guided by the guide surface 10 flows through the air outlet 7, since the airflow has been closely attached to the surface of the air intake surface 8, a more stable local low-pressure area can be formed at the air outlet 7, thereby more efficiently drawing hot air from inside the shell 2 and discharging it through the air outlet 7, further improving the heat dissipation efficiency. It should be noted that in this embodiment, a baffle 11 and an air inlet 12 as described in embodiment 2 can also be provided.

[0046] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A shape memory alloy pneumatic controller with enhanced heat dissipation, characterized in that, include: The housing (2) has an internal cavity (6) and an air inlet (3) and an air outlet (4) on its surface. A valve body assembly is disposed in the receiving cavity (6). The valve body assembly is provided with an air inlet and multiple independent air vents. Each air vent is provided with a valve core unit. Each valve core unit is connected to an independent shape memory alloy wire (1). The shape memory alloy wire (1) is configured to provide a deflection force to the valve core unit through thermal actuation. An exhaust device (5) is provided in the receiving cavity (6). The air inlet of the exhaust device (5) is connected to the receiving cavity (6), and the air outlet is facing the air outlet (4). The outer wall of the housing (2) corresponding to the air outlet (4) forms an air-guiding surface (8), and the housing (2) located in the area of ​​the air-guiding surface (8) is provided with an air outlet (7). The exhaust device (5) draws the gas in the accommodating cavity (6) into the exhaust device (5) through the air inlet and discharges it through the air outlet. The discharged gas flows along the air intake surface (8) to form a pressure difference at both ends of the air outlet (7).

2. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 1, characterized in that, The air-guiding surface (8) is provided with an air guide wall (9), which is used to guide the airflow discharged from the air outlet to the air outlet (7).

3. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 2, characterized in that, The air guide wall (9) is provided in multiple ways. The multiple air guide walls (9) are arranged along a first direction and extend along a second direction. The second direction is the air outlet direction of the air outlet end. The first direction is perpendicular to the second direction and parallel to the air intake surface (8). An air guide channel (16) is formed between adjacent air guide walls (9). Each air guide channel (16) is provided with at least one air outlet hole (7).

4. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 3, characterized in that, The air-guiding surface (8) is provided with a protruding guide surface (10) corresponding to each of the air ducts (16), and the guide surface (10) connects two adjacent air-guiding walls (9); the guide surface (10) is located on the side of the air outlet (7) away from the air outlet (4), and smoothly transitions with the edge of the air outlet (7).

5. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 3, characterized in that, The air-guiding surface (8) is provided with a protruding guide surface (10) corresponding to each of the air ducts (16), and the guide surface (10) connects two adjacent air-guiding walls (9); the guide surface (10) is located on the side of the air outlet (7) close to the air outlet (4), and smoothly transitions with the edge of the air outlet (7).

6. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 4 or 5, characterized in that, At least one baffle (11) is provided on the air-guiding surface (8) corresponding to each air-guiding channel (16), and there is a gap between the baffle (11) and the air-guiding wall (9); the baffle (11) is located on the side of the air outlet (7) close to the air outlet (4), and the windward surface is an arc surface with an opening away from the air outlet (4); the housing (2) is provided with at least one air-replenishing hole (12) between the air outlet (7) and the baffle (11).

7. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 1, characterized in that, The cavity (6) is also provided with a circuit board (17), which integrates an electrical control module for controlling the power supply of the memory alloy wire (1). The circuit board (17) has ventilation holes (18).

8. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 1, characterized in that, The edge of the air intake surface (8) area is provided with a guide surface (13) at one end near the exhaust device (5), and the guide surface (13) guides the air intake surface (8) into the cavity (6).

9. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 3, characterized in that, The housing (2) includes a first side shell (14) and a second side shell (15) that are detachably connected, and the air outlet (4) and the air intake surface (8) are provided on the second side shell (15).

10. The shape memory alloy pneumatic controller with enhanced heat dissipation according to claim 9, characterized in that, The first side shell (14) and the second side shell (15) are provided with a plurality of air inlets (3), and the plurality of air inlets (3) and the plurality of shape memory alloy wires (1) are arranged along the second direction.

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