A pneumatic controller using memory alloy wire

Abstract

The application provides a pneumatic controller using a memory alloy wire, and relates to the technical field of automobile accessories. The pneumatic controller comprises a shell, a gas valve assembly, a circuit board assembly and a cooling fan, the shell is provided with a mounting cavity, a first air inlet and an air outlet; the gas valve assembly is arranged in the mounting cavity and comprises a first module for controlling the inflation and deflation of a waist support air bag and a second module for controlling the inflation and deflation of a massage air bag arranged in layers; the circuit board assembly is arranged in the mounting cavity, the opening and closing of the first module are controlled by a first memory alloy wire, and the opening and closing of the second module are controlled by a second memory alloy wire; the cooling fan is arranged in the mounting cavity and is configured to drive airflow to flow into the mounting cavity from the first air inlet and then be discharged from the air outlet. The gas valve assembly formed by the first module and the second module reduces the occupied space, the first memory alloy wire and the second memory alloy wire are simultaneously cooled by the cooling fan, and the normal extension and contraction of the first memory alloy wire and the second memory alloy wire can be ensured.

Description

Technical Field

[0001] This disclosure relates to the field of automotive parts technology, and more specifically to a pneumatic controller using shape memory alloy wire. Background Technology

[0002] In recent years, with the technological advancements in the automotive industry, seat configurations have become increasingly sophisticated. Car seats are equipped with airbags, which provide support and massage to occupants through inflation and deflation. These airbags include lumbar support airbags and massage airbags. Lumbar support airbags provide lumbar support, while massage airbags provide a kneading and massaging effect. Each type of airbag has its own pneumatic controller; the lumbar support airbag controller controls the inflation and deflation of the lumbar support airbag, and the massage airbag controller controls the inflation and deflation of the massage airbag.

[0003] The lumbar support airbag controller and the massage airbag controller each utilize shape memory alloy wires that deform when power is applied or removed to move corresponding valve rods, thereby opening or closing the corresponding airflow channels. As the lumbar support airbag controller and the massage airbag controller operate for extended periods, the internal heat of the controllers can affect the expansion and contraction of the shape memory alloy wires, thus impacting the normal operation of the controllers. Furthermore, the independent design of the lumbar support airbag controller and the massage airbag controller occupies space, hindering the efficient use of the seat's interior space. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a pneumatic controller using shape memory alloy wire.

[0005] This application provides a pneumatic controller using shape memory alloy wire, comprising:

[0006] The housing is provided with a mounting cavity, a first air inlet, and an exhaust outlet;

[0007] The air valve assembly is located in the mounting cavity and includes a first module for controlling the inflation and deflation of the waist support air bag and a second module for controlling the inflation and deflation of the massage air bag, which are arranged in layers.

[0008] A circuit board assembly is disposed within the mounting cavity, and the opening and closing of the first module is controlled by a first shape memory alloy wire, and the opening and closing of the second module is controlled by a second shape memory alloy wire.

[0009] A cooling fan is disposed within the mounting cavity and configured to drive airflow into the mounting cavity from the first air inlet and then out through the exhaust port.

[0010] Optionally, the airflow path that enters the mounting cavity through the first air inlet and then exits through the exhaust port is the first heat dissipation path, and both the first shape memory alloy wire and the second shape memory alloy wire are located on the first heat dissipation path.

[0011] Optionally, the first shape memory alloy wire is located above the second shape memory alloy wire;

[0012] The first air inlet is located above the first shape memory alloy wire on the side near the valve assembly;

[0013] The cooling fan is located below the second shape memory alloy wire on the side away from the valve assembly;

[0014] The exhaust port is located on the side of the cooling fan away from the valve assembly.

[0015] Optionally, the circuit board assembly includes a circuit board and electronic components. The circuit board has multiple ventilation holes located below the first shape memory alloy wire on the side near the valve assembly.

[0016] Optionally, the heat dissipation path of the airflow flowing through the first air inlet, the first shape memory alloy wire, and the ventilation hole to the cooling fan is the second heat dissipation path.

[0017] Optionally, the housing is further provided with a second air inlet, which is located below the second shape memory alloy wire on the side near the valve assembly.

[0018] Optionally, the heat dissipation path from the second air inlet and the second shape memory alloy wire to the cooling fan is the third heat dissipation path.

[0019] Optionally, the first shape memory alloy wire is connected to the valve stem of the first module via a first locking mechanism; the second shape memory alloy wire is connected to the valve stem of the second module via a second locking mechanism; the airflow of the first heat dissipation path and the second heat dissipation path flows through the first locking mechanism; and the airflow of the third heat dissipation path flows through the second locking mechanism.

[0020] Optionally, the pneumatic controller is provided with multiple first shape memory alloy wires and multiple second shape memory alloy wires, and the housing is provided with multiple first air inlets and multiple second air inlets.

[0021] Optionally, the pneumatic controller is installed inside the vehicle seat;

[0022] The pneumatic controller also includes an exhaust pipe, one end of which is connected to the exhaust port, and the other end of which extends outside the car seat.

[0023] As can be seen from the above technical solution, this application has at least the following beneficial effects:

[0024] The pneumatic controller using shape memory alloy wire provided in this application includes a valve assembly formed by a first module controlling the inflation and deflation of the lumbar support airbag and a second module controlling the inflation and deflation of the massage airbag. Compared with the separate lumbar support airbag controller and massage airbag controller in the prior art, it reduces the space occupied and is conducive to the rational use of the interior space of the seat. Moreover, by actively cooling the first and second shape memory alloy wires inside the controller housing simultaneously through a cooling fan, it can ensure that the first and second shape memory alloy wires are cooled in time when they extend due to power failure, ensuring the normal extension and contraction of the first and second shape memory alloy wires, thereby ensuring the normal operation of the pneumatic controller. Attached Figure Description

[0025] 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:

[0026] Figure 1 A cross-sectional view of the pneumatic controller AA provided in an embodiment of this application;

[0027] Figure 2 A cross-sectional view of the pneumatic controller BB provided in an embodiment of this application;

[0028] Figure 3 A front view of the pneumatic controller provided in an embodiment of this application;

[0029] Figure 4 A side view of the pneumatic controller provided in an embodiment of this application;

[0030] Figure 5 A top view of the pneumatic controller provided in an embodiment of this application;

[0031] Figure 6 An exploded view of the pneumatic controller provided in the embodiments of this application;

[0032] Figure 7 A schematic diagram of a circuit board assembly, a first shape memory alloy wire, and a first valve stem provided in an embodiment of this application.

[0033] The diagram is labeled as follows: 1-Housing; 11-Mounting cavity; 12-First air inlet; 13-Exhaust port; 14-Second air inlet; 2-Circuit board assembly; 21-Ventilation hole; 31-First shape memory alloy wire; 32-Second shape memory alloy wire; 4-Valve assembly; 41-First module; 42-Second module; 43-First valve stem; 431-First locking mechanism; 44-Second valve stem; 441-Second locking mechanism; 45-Third module; 5-Cooling fan; 6-Exhaust pipe; 7-Quick connector; 81-First isolation component; 811-First isolation groove; 82-Second isolation component; 821-Second isolation groove. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] To ensure clarity and conciseness in the description of the following embodiments, a brief introduction to the related technologies is given first:

[0037] Automobiles are widely used as a means of transportation. Automobiles can be specifically categorized as gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Automobiles are equipped with seats for passengers.

[0038] With the advancement of automotive technology, seat configurations are becoming increasingly sophisticated. Car seats incorporate airbags that provide support and massage to occupants through inflation and deflation. These airbags include lumbar support airbags and massage airbags. Lumbar support airbags provide lumbar support, while massage airbags offer gentle pressure and massage. Each type of airbag has its own pneumatic controller: the lumbar support airbag controller regulates inflation and deflation, and the massage airbag controller regulates inflation and deflation.

[0039] Taking the waist support air bag controller as an example, the waist support air bag controller is connected to the air pump and the waist support air bag respectively through air pipes. The waist support air bag controller controls the opening and closing of its valve to realize the inflation or deflation of the waist support air bag.

[0040] Specifically, the lumbar support airbag controller and the massage airbag controller utilize the deformation of shape memory alloy wires when the power is turned on and off to control the opening and closing of valves, thereby realizing the inflation and deflation of airbags.

[0041] As the working time of the lumbar support airbag controller and massage airbag controller increases, the controller generates heat and the ambient temperature rises. This makes it difficult for the shape memory alloy wire to cool down in time when it stretches after power is cut off, which makes it difficult to ensure the reset efficiency of the shape memory alloy wire and thus affects the normal operation of the controller. In addition, the lumbar support airbag controller and massage airbag controller are set up independently, which takes up space and is not conducive to the rational use of the interior space of the seat.

[0042] Therefore, this application provides a pneumatic controller using shape memory alloy wires, including a valve assembly formed by a first module controlling the inflation and deflation of the lumbar support airbag and a second module controlling the inflation and deflation of the massage airbag. Compared with the separate lumbar support airbag controller and massage airbag controller in the prior art, it reduces the space occupied and is conducive to the rational use of the interior space of the seat. Moreover, by actively cooling the first and second shape memory alloy wires inside the controller housing simultaneously through a cooling fan, it can ensure that the first and second shape memory alloy wires are cooled in time when they extend due to power failure, ensuring the normal extension and contraction of the first and second shape memory alloy wires, thereby ensuring the normal operation of the pneumatic controller.

[0043] In some embodiments, the first module 41 can control the inflation and deflation of the first air bag, and the second module 42 can control the inflation and deflation of the second air bag. The first air bag and the second air bag can be air bags of the same or similar categories, or they can be air bags of different categories. For example, the first air bag may include a lumbar support air bag, and the second air bag may include a massage air bag.

[0044] The pneumatic controller using shape memory alloy wire provided in this application will be described below with reference to the accompanying drawings:

[0045] like Figure 1 As shown, the pneumatic controller includes a housing 1, a valve assembly 4, a circuit board assembly 2, and a cooling fan 5. The housing 1 is provided with a mounting cavity 11, a first air inlet 12, and an exhaust port 13. The valve assembly 4 is disposed in the mounting cavity 11 and includes a first module 41 for controlling the inflation and deflation of the waist support air bag and a second module 42 for controlling the inflation and deflation of the massage air bag, which are arranged in layers. The circuit board assembly 2 is disposed in the mounting cavity 11 and controls the opening and closing of the first module 41 through a first shape memory alloy wire 31 and controls the opening and closing of the second module 42 through a second shape memory alloy wire 32. The cooling fan 5 is disposed in the mounting cavity 11 and is configured to drive airflow into the mounting cavity 11 from the first air inlet 12 and then discharge through the exhaust port 13.

[0046] Specifically, such as Figure 2 As shown, the valve assembly 4 is located on the right side of the circuit board assembly 2, with a gap between them. The first shape memory alloy wire 31 is located above the circuit board assembly 2, and the second shape memory alloy wire 32 is located below the circuit board assembly 2. The first module 41 is provided with a first valve stem 43, and the second module 42 is provided with a second valve stem 44. The first shape memory alloy wire 31 is connected to the first valve stem 43 and the circuit board assembly 2 respectively, and the second shape memory alloy wire 32 is connected to the second valve stem 44 and the circuit board assembly 2 respectively.

[0047] Circuit board assembly 2 is connected to a power source and receives command signals from the control unit to selectively connect or disconnect the power source from the first shape memory alloy wire 31 and the second shape memory alloy wire 32. Circuit board assembly 2 provides unified control of the first shape memory alloy wire 31 and the second shape memory alloy wire 32, achieving coordinated management of the lumbar support and massage functions.

[0048] The valve assembly 4 also includes a third module 45, such as Figure 3 As shown, the third module 45 is located to the right of the first module 41, and the third module 45 is used to connect the air pump.

[0049] In some embodiments, the operation of the pneumatic controller can be as follows:

[0050] In the power-off state, the channels of the first module 41 and the second module 42 are normally closed.

[0051] When the lumbar support airbag needs to be inflated, the first shape memory alloy wire 31 is energized and contracts, driving the first valve stem 43 to move, thus opening the channel of the first module 41. Compressed air from the air pump flows into the lumbar support airbag through the channel of the first module 41. After the lumbar support airbag is inflated, the first shape memory alloy wire 31 is de-energized and extends, and the first valve stem 43 returns to its original position, closing the channel of the first module 41 and keeping the lumbar support airbag in a pressure-holding state. When the lumbar support airbag needs to be deflated, the first shape memory alloy wire 31 is energized and contracts, driving the first valve stem 43 to move, thus opening the channel of the first module 41. The airflow inside the lumbar support airbag is then discharged through the channel of the first module 41.

[0052] When the massage air bag needs to be inflated, the second shape memory alloy wire 32 is energized and contracts, driving the second valve stem 44 to move, thus opening the channel of the second module 42. Compressed air from the air pump flows into the massage air bag through the channel of the second module 42. After the massage air bag is inflated, the second shape memory alloy wire 32 is de-energized and extends, and the second valve stem 44 returns to its original position, closing the channel of the second module 42 and keeping the massage air bag in a pressure-holding state. When the massage air bag needs to be deflated, the second shape memory alloy wire 32 is energized and contracts, driving the second valve stem 44 to move, thus opening the channel of the second module 42. The airflow inside the massage air bag is then discharged through the channel of the second module 42.

[0053] During the power-off extension process of the first memory alloy wire 31 and / or the second memory alloy wire 32, the circuit board assembly 2 controls the cooling fan 5 to turn on. The cooling fan 5 drives the airflow from the first air inlet 12 into the mounting cavity 11 and then out through the exhaust port 13, so that the heat in the mounting cavity 11 is discharged, so as to simultaneously dissipate heat from the first memory alloy wire 31, the second memory alloy wire 32 and the circuit board assembly 2, ensuring that the first memory alloy wire 31 and the second memory alloy wire 32 can be cooled in time when the power is off, ensuring normal extension and contraction, and ensuring the normal operation of the pneumatic controller.

[0054] The pneumatic controller provided in this embodiment includes a valve assembly 4 formed by a first module 41 for controlling the inflation and deflation of the lumbar support airbag and a second module 42 for controlling the inflation and deflation of the massage airbag. Compared with the separate lumbar support airbag controller and massage airbag controller in the prior art, it reduces the space occupied and is conducive to the rational use of the interior space of the seat. Moreover, by actively cooling the first memory alloy wire 31 and the second memory alloy wire 32 inside the controller housing 1 through the cooling fan 5, it can ensure that the first memory alloy wire 31 and the second memory alloy wire 32 are cooled in time when they extend due to power failure, ensuring the normal extension and contraction of the first memory alloy wire 31 and the second memory alloy wire 32, thereby ensuring the normal operation of the pneumatic controller.

[0055] Specifically, the airflow path that enters the mounting cavity 11 through the first air inlet 12 and is then discharged through the exhaust port 13 is the first heat dissipation path, and the first shape memory alloy wire 31 and the second shape memory alloy wire 32 are both located on the first heat dissipation path.

[0056] When the fan is turned on, the airflow enters the mounting cavity 11 through the first air inlet 12, and then flows over the surfaces of the first memory alloy wire 31 and the second memory alloy wire 32 to carry away the heat generated by the first memory alloy wire 31 and the second memory alloy wire 32. Finally, the airflow is discharged from the exhaust port 13.

[0057] In this embodiment, by placing the first memory alloy wire 31 and the second memory alloy wire 32 on the first heat dissipation path, the cooling airflow can directly flow over the surfaces of the first memory alloy wire 31 and the second memory alloy wire 32 to directly remove the heat generated by the first memory alloy wire 31 and the second memory alloy wire 32, thus ensuring the heat dissipation effect of the first memory alloy wire 31 and the second memory alloy wire 32.

[0058] In order to achieve sufficient heat dissipation for the first shape memory alloy wire 31 and the second shape memory alloy wire 32, in this embodiment, the first shape memory alloy wire 31 is located above the second shape memory alloy wire 32; the first air inlet 12 is located above the first shape memory alloy wire 31 on the side closer to the air valve assembly 4; the cooling fan 5 is located below the second shape memory alloy wire 32 on the side away from the air valve assembly 4; and the exhaust port 13 is located on the side of the cooling fan 5 away from the air valve assembly 4.

[0059] For example Figure 1 In the illustrated embodiment, the first shape memory alloy wire 31 is located above the second shape memory alloy wire 32, the first air inlet 12 is located to the upper right of the first shape memory alloy wire 31, the cooling fan 5 is located to the lower left of the second shape memory alloy wire 32, and the exhaust port 13 is located to the left of the cooling fan 5. When the fan is turned on, airflow flows into the mounting cavity 11 from the first air inlet 12, then flows sequentially through the first shape memory alloy wire 31 and the second shape memory alloy wire 32, and finally exits from the exhaust port 13 on the left side of the cooling fan 5.

[0060] In this embodiment, the relative arrangement of the first air inlet 12, the cooling fan 5, and the exhaust port 13 with the first shape memory alloy wire 31 and the second shape memory alloy wire 32 allows the cooling airflow to fully act on the first shape memory alloy wire 31 and the second shape memory alloy wire 32, thereby achieving sufficient heat dissipation for the first shape memory alloy wire 31 and the second shape memory alloy wire 32. Moreover, the cooling fan 5 and the exhaust port 13 are located far from the valve assembly 4, which can avoid the influence of the cooling airflow on the air passage sealing of the valve assembly 4.

[0061] In order to improve the flow of heat dissipation airflow in the mounting cavity 11, the circuit board assembly 2 includes a circuit board and electronic components. The circuit board has multiple ventilation holes 21, which are located below the first shape memory alloy wire 31 on the side near the valve assembly 4.

[0062] like Figure 2 and Figure 7 As shown, the ventilation hole 21 is located to the lower left of the first air inlet 12.

[0063] In this embodiment, the ventilation hole 21 allows the heat dissipation airflow to pass more smoothly through the circuit board area, avoiding airflow blockage, and also promotes the circulation of airflow in the mounting cavity 11, while helping to reduce the temperature of the circuit board itself.

[0064] Specifically, in combination Figure 6 and Figure 7 The pneumatic controller is equipped with multiple first memory alloy wires 31 and multiple second memory alloy wires 32 arranged along the first direction. The circuit board is equipped with multiple ventilation holes 21 arranged along the first direction to ensure the heat dissipation effect of the multiple first memory alloy wires 31 and multiple second memory alloy wires 32.

[0065] The heat dissipation path that flows from the first air inlet 12, the first shape memory alloy wire 31 and the ventilation hole 21 to the cooling fan 5 is the second heat dissipation path.

[0066] When the cooling fan 5 is turned on, the airflow flows into the mounting cavity 11 through the first air inlet 12, and then flows along the first heat dissipation path and the second heat dissipation path to improve the heat dissipation effect on the first memory alloy wire 31, the second memory alloy wire 32 and the circuit board assembly 2.

[0067] To ensure uniform heat dissipation, such as Figure 6 As shown, a second air inlet 14 is also provided on the housing 1. The second air inlet 14 is located below the second shape memory alloy wire 32 on the side near the valve assembly 4.

[0068] When the cooling fan 5 is turned on, airflow flows into the mounting cavity 11 from the first air inlet 12 and the second air inlet 14 respectively. The airflow flowing in from the second air inlet 14 will preferentially flow through the second shape memory alloy wire 32, providing targeted cooling airflow for the second shape memory alloy wire 32, enhancing the cooling effect of the second shape memory alloy wire 32, ensuring the uniformity of cooling of the first shape memory alloy wire 31 and the second shape memory alloy wire 32, maintaining the synchronization of the expansion and contraction performance of the first shape memory alloy wire 31 and the second shape memory alloy wire 32, and thus maintaining the consistency of inflation and deflation of the lumbar support air bag and the massage air bag. At the same time, the dual air inlet design increases the total amount of cooling airflow in the mounting cavity 11, improves the overall cooling effect, and enables the pneumatic controller to adapt to continuous working scenarios for a longer period of time.

[0069] The third heat dissipation path is the path through which the air flows to the cooling fan 5 after passing through the second air inlet 14 and the second shape memory alloy wire 32.

[0070] When the cooling fan 5 is turned on, the airflow flows into the mounting cavity 11 through the first air inlet 12 and the second air inlet 14, and then flows along the first heat dissipation path, the second heat dissipation path and the third heat dissipation path to further improve the heat dissipation effect on the first memory alloy wire 31, the second memory alloy wire 32 and the circuit board assembly 2.

[0071] To improve the connection stability of the first shape memory alloy wire 31 and the second shape memory alloy wire 32, the first shape memory alloy wire 31 is connected to the valve stem of the first module 41 through the first locking mechanism 431, and the second shape memory alloy wire 32 is connected to the valve stem of the second module 42 through the second locking mechanism 441.

[0072] The first locking mechanism 431 locks the first shape memory alloy wire 31 to the valve stem of the first module 41, and the second locking mechanism 441 locks the second shape memory alloy wire 32 to the valve stem of the second module 42, thereby improving the connection stability between the first shape memory alloy wire 31 and the valve stem of the first module 41, as well as the connection stability between the second shape memory alloy wire 32 and the valve stem of the second module 42.

[0073] In one specific embodiment, such as Figure 2 and Figure 7As shown, the first locking mechanism 431 is a first locking groove provided on the first valve stem 43, and the first shape memory alloy wire 31 is hung in the first locking groove; the second locking mechanism 441 is a second locking groove provided on the second valve stem 44, and the second shape memory alloy wire 32 is hung in the second locking groove.

[0074] At the first locking mechanism 431, the space where the first shape memory alloy wire 31 is located is relatively small, and heat is easily generated at this location; similarly, heat is also easily generated at the second locking mechanism 441.

[0075] To prevent heat buildup, the airflow of the first and second heat dissipation paths flows through the first locking mechanism 431, and the airflow of the third heat dissipation path flows through the second locking mechanism 441.

[0076] Specifically, the first air inlet 12 is located above the first locking mechanism 431, and the second air inlet 14 is located below the second locking mechanism 441, so that the airflow flowing into the first air inlet 12 flows through the first locking mechanism 431, and the airflow flowing into the second air inlet 14 flows through the second locking mechanism 441.

[0077] In one specific embodiment, combined with Figure 3 and Figure 6 The first module 41 is provided with a plurality of first valve bodies arranged along the first direction to control the inflation and deflation of a plurality of waist support air bags, and the second module 42 is provided with a plurality of second valve bodies arranged along the first direction to control the inflation and deflation of a plurality of massage air bags.

[0078] Combination Figure 6 and Figure 7 The pneumatic controller is equipped with multiple first shape memory alloy wires 31 and multiple second shape memory alloy wires 32 arranged along the first direction. Each first shape memory alloy wire 31 can independently control a lumbar support air bag, and each second shape memory alloy wire 32 can independently control a massage air bag, thereby achieving precise and differentiated inflation and deflation control.

[0079] To ensure that each first shape memory alloy wire 31 and each second shape memory alloy wire 32 receives sufficient heat dissipation airflow, combined with Figure 5 and Figure 6 The housing 1 is provided with a plurality of first air inlets 12 and a plurality of second air inlets 14 arranged along a first direction.

[0080] In some embodiments, the housing 1 is provided with a plurality of first air inlets 12 and / or a plurality of second air inlets 14.

[0081] In some embodiments, the number and location of the first air inlet 12 and / or the second air inlet 14 can be flexibly adjusted according to actual ventilation and heat dissipation requirements.

[0082] In one specific embodiment, the pneumatic controller is installed inside the car seat; such as Figure 2 As shown, the pneumatic controller also includes an exhaust pipe 6, one end of which is connected to the exhaust port 13, and the other end of which extends to the outside of the car seat so that the airflow discharged from the exhaust port 13 flows through the exhaust pipe 6 to the outside of the car seat.

[0083] One end of the exhaust pipe 6 is connected to the exhaust port 13, and the other end of the exhaust pipe 6 extends out of the car seat, so that the heat after cooling is discharged from the exhaust pipe 6 to the outside of the car seat, preventing the heat from accumulating inside the car seat and thus preventing it from affecting the comfort of the passengers; it can also prevent the heat after cooling from flowing back into the mounting cavity 11, avoiding negative impact on the heat dissipation effect.

[0084] In one specific embodiment, the first module 41 includes a first valve body, and the second module 42 includes a second valve body, with the first valve body and the second valve body being integrally formed.

[0085] In this embodiment, the first valve body and the second valve body are integrally formed, ensuring the overall structural strength and sealing of the valve assembly 4, and ensuring pressure stability and control precision during the inflation and deflation process. In addition, the integrated structure makes the valve assembly 4 more compact, further optimizing the space utilization within the mounting cavity 11.

[0086] Specifically, the first valve body and the second valve body can be integrally cast.

[0087] In one specific embodiment, such as Figures 3 to 6 As shown, the pneumatic controller also includes a quick-connect plug 7, which is connected to the second module 42.

[0088] Car seats are usually equipped with multiple massage air bags. The second module 42 is used to control the inflation and deflation of multiple massage air bags. Each massage air bag is connected to the second module 42 through an air tube, so multiple air tubes need to be connected to the second module 42.

[0089] To enable rapid assembly of multiple air tubes, quick-connect plugs 7 are connected to the second module 42.

[0090] Quick Connector 7 is a standardized quick-connect component adapted to the pneumatic controller of automotive seats. Multiple air hoses are connected to Quick Connector 7. Quick Connector 7 is equipped with a sealing structure and an anti-detachment structure to ensure the sealing and stability of the air hoses after connection. The air hoses can be connected and fixed without additional tools, while ensuring the reliability of the air circuit sealing.

[0091] In one specific embodiment, such as Figure 6As shown, the pneumatic controller also includes a first isolation component 81 and a second isolation component 82; the first isolation component 81 is disposed on one side of the circuit board assembly 2, the first isolation component 81 is provided with a plurality of first isolation grooves 811, and a plurality of first memory alloy wires 31 are provided, each first memory alloy wire 31 being located in a corresponding first isolation groove 811; the second isolation component 82 is disposed on the other side of the circuit board assembly 2, the second isolation component 82 is provided with a plurality of second isolation grooves 821, and a plurality of second memory alloy wires 32 are provided, each second memory alloy wire 32 being located in a corresponding second isolation groove 821.

[0092] exist Figure 6 In the embodiment shown, multiple first memory alloy wires 31 and multiple second memory alloy wires 32 are arranged along a first direction, and multiple first isolation grooves 811 and multiple second isolation grooves 821 are arranged along a first direction. Each first memory alloy wire 31 is located in a corresponding first isolation groove 811, and each second memory alloy wire 32 is located in a corresponding second isolation groove 821.

[0093] In this embodiment, the first isolation component 81 and the second isolation component 82 achieve independent isolation of multiple first memory alloy wires 31 and multiple second memory alloy wires 32, avoiding direct contact between multiple wires, preventing short circuits, entanglement or mutual interference caused by wire deformation and vibration during operation, ensuring the independent control accuracy of each first memory alloy wire 31 and each second memory alloy wire 32, and ensuring the independence of inflation and deflation control of different lumbar support air bags and massage air bags.

[0094] 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 pneumatic controller using shape memory alloy wire, characterized in that, include: The housing (1) is provided with a mounting cavity (11), a first air inlet (12) and an exhaust outlet (13); The air valve assembly (4) is located in the mounting cavity (11) and includes a first module (41) for controlling the inflation and deflation of the waist support air bag and a second module (42) for controlling the inflation and deflation of the massage air bag, which are arranged in layers. The circuit board assembly (2) is disposed in the mounting cavity (11), and the opening and closing of the first module (41) is controlled by the first memory alloy wire (31), and the opening and closing of the second module (42) is controlled by the second memory alloy wire (32). A cooling fan (5) is disposed in the mounting cavity (11) and configured to drive airflow into the mounting cavity (11) through the first air inlet (12) and then discharge through the exhaust port (13).

2. The pneumatic controller according to claim 1, characterized in that, The airflow path that enters the mounting cavity (11) through the first air inlet (12) and is then discharged through the exhaust port (13) is the first heat dissipation path. The first shape memory alloy wire (31) and the second shape memory alloy wire (32) are both located on the first heat dissipation path.

3. The pneumatic controller according to claim 2, characterized in that, The first shape memory alloy wire (31) is located above the second shape memory alloy wire (32); The first air inlet (12) is located above the first shape memory alloy wire (31) on the side near the valve assembly (4); The cooling fan (5) is located below the second shape memory wire (32) on the side away from the valve assembly (4); The exhaust port (13) is located on the side of the cooling fan (5) away from the valve assembly (4).

4. The pneumatic controller according to claim 3, characterized in that, The circuit board assembly (2) includes a circuit board and electronic components. The circuit board has a plurality of ventilation holes (21) located below the first memory alloy wire (31) on the side near the valve assembly (4).

5. The pneumatic controller according to claim 4, characterized in that, The second heat dissipation path is the airflow that flows from the first air inlet (12), the first shape memory alloy wire (31) and the ventilation hole (21) to the cooling fan (5).

6. The pneumatic controller according to claim 5, characterized in that, The housing (1) is also provided with a second air inlet (14), which is located below the second shape memory alloy wire (32) on the side near the valve assembly (4).

7. The pneumatic controller according to claim 6, characterized in that, The airflow path from the second air inlet (14) and the second shape memory alloy wire (32) to the cooling fan (5) is the third cooling path.

8. The pneumatic controller according to claim 7, characterized in that, The first shape memory alloy wire (31) is connected to the valve stem of the first module (41) through the first locking mechanism (431); The second shape memory alloy wire (32) is connected to the valve stem of the second module (42) through the second locking mechanism (441); The airflow of the first heat dissipation path and the second heat dissipation path flows through the first locking mechanism (431). The airflow of the third heat dissipation path flows through the second locking mechanism (441).

9. The pneumatic controller according to claim 6, characterized in that, The pneumatic controller is provided with multiple first shape memory alloy wires (31) and multiple second shape memory alloy wires (32), and the housing (1) is provided with multiple first air inlets (12) and multiple second air inlets (14).

10. The pneumatic controller according to claim 1, characterized in that, The pneumatic controller is installed inside the car seat; the pneumatic controller also includes an exhaust pipe (6), one end of which is connected to the exhaust port (13), and the other end of which extends outside the car seat.

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