Aerodynamic comfort system control circuit and aerodynamic comfort system

Abstract

The utility model provides pneumatic comfortable system control circuit and pneumatic comfortable system, the utility model discloses pneumatic comfortable system control circuit includes gas source drive module, gas valve drive module, high side drive module and controller, wherein, high side drive module is equipped with first input, first output and first power end, the first power end is connected with external power supply and takes electricity, first output is connected with gas source drive module and gas valve drive module and supplies power, controller with gas source drive module and gas valve drive module enables connection, the controller is connected with first input and passes through high side drive module control gas source drive module and / or gas valve drive module work. The utility model passes through the integrated high side drive module unified control gas source drive module and gas valve drive module, combines multistage protection circuit and diagnostic feedback mechanism, effectively simplifies circuit structure, reduces hardware cost and layout complexity, improves system reliability and integration.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic comfort system control circuit technology, and in particular to pneumatic comfort system control circuit and pneumatic comfort system. Background Technology

[0002] In pneumatic comfort systems, such as vehicle seat massage devices, air pumps and solenoid valves are typically used as core actuators. Currently, the mainstream control scheme involves configuring separate high-side drivers for the air pump and solenoid valve. These two drivers not only handle their respective power drive functions but also need to perform corresponding fault diagnosis and status feedback, such as overcurrent, short circuit, or open circuit detection. This discrete architecture leads to an increased number of components in the circuit, a more complex layout, and a larger printed circuit board area, significantly increasing the electronic hardware cost and design difficulty of the system. At the same time, the dual-driver configuration reduces resource utilization, hinders the miniaturization and integration of the control unit, and lacks competitiveness in cost-sensitive applications.

[0003] Therefore, there is room for optimization and integration of existing technologies, and there is an urgent need for a more integrated and lower-cost driving solution. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes a pneumatic comfort system control circuit and a pneumatic comfort system, which solves the problems of increased component quantity, complex layout, and larger printed circuit board area in existing discrete control architectures, significantly increasing the electronic hardware cost and design difficulty of the system.

[0005] In a first aspect, this utility model provides a control circuit for a pneumatic comfort system, comprising: A gas source drive module is used to connect to the gas source device enable function to control the operation of the gas source device. A valve drive module is used to connect with a valve enable to control the operation of the valve. The high-side drive module is provided with a first input terminal, a first output terminal and a first power terminal. The first power terminal is connected to an external power source for power supply, and the first output terminal is connected to the air source drive module and the air valve drive module for power supply. The controller is connected to the air source drive module and the air valve drive module, and the controller is connected to the first input terminal of the high-side drive module and controls the operation of the air source drive module and / or the air valve drive module through the high-side drive module.

[0006] In some embodiments, the high-side driving module includes a high-side driving chip, a first protection circuit, and a second protection circuit; The first input terminal, the first output terminal, and the first power supply terminal are disposed on the high-side driving chip. The first input terminal is connected to the controller through a first resistor. The first power supply terminal is connected to an external power source through a first protection circuit. The first output terminal is connected to the air source driving module and / or the air valve driving module through a second protection circuit for power supply.

[0007] In some embodiments, the first protection circuit includes a first ferrite bead and at least one first capacitor; The first end of the first magnetic bead is connected to an external power source, and the second end of the first magnetic bead is connected to the first power source and the first end of the first capacitor. The second end of the first capacitor is connected to the power source ground.

[0008] In some embodiments, the second protection circuit includes a second ferrite bead, at least one second capacitor, and at least one third capacitor; The first end of the second magnetic bead is connected to the first output terminal and the first end of the second capacitor, and the second end of the second magnetic bead is connected to the air source drive module and / or the air valve drive module. The first end of the third capacitor is connected to the second end of the second magnetic bead, and the second ends of the second capacitor and the second ends of the third capacitor are both connected to the power supply ground.

[0009] In some embodiments, the high-side driving module further includes a first voltage sampling circuit, which is used to sample the output voltage of the first output terminal and output it to the controller; The first voltage sampling circuit includes a second resistor, a third resistor, a fourth resistor, and a fourth capacitor; the first end of the second resistor is connected to the first output terminal, and the second end of the second resistor is connected to the first end of the third resistor and the first end of the fourth resistor; the second end of the third resistor is connected to the controller and the first end of the fourth capacitor; and the second end of the fourth resistor and the second end of the fourth capacitor are connected to the power supply ground.

[0010] In some embodiments, the high-edge driving module further includes a diagnostic protection circuit; the high-edge driving chip is further provided with a first diagnostic terminal and a first feedback terminal, the first diagnostic terminal is connected to the controller through a fifth resistor to obtain the controller's diagnostic signal; the first feedback terminal is connected to the controller through the diagnostic protection circuit to output a feedback signal; The diagnostic protection circuit includes a sixth resistor, a seventh resistor, a first Zener diode, and a fifth capacitor. The first end of the sixth resistor is connected to the first feedback terminal and the first end of the seventh resistor, and the second end of the sixth resistor is connected to the first end of the first Zener diode, the first end of the fifth capacitor, and the controller. The second ends of the first Zener diode, the fifth capacitor, and the seventh resistor are all connected to the power supply ground.

[0011] In some embodiments, the gas source drive module includes a first MOSFET, a first transistor, a first diode, a transient suppression diode, and a sixth capacitor; The base of the first transistor is connected to the controller through a resistor, the collector is connected to the gate of the first MOSFET through a resistor, and the emitter is grounded; The source of the first MOS transistor is connected to the first power supply terminal, and the drain is connected to the gas source device, the first terminal of the first diode, the first terminal of the transient suppression diode, and the first terminal of the sixth capacitor. The second terminal of the first diode, the second terminal of the transient suppression diode, and the second terminal of the sixth capacitor are connected to the power supply ground.

[0012] In some embodiments, the gas source drive module further includes a second voltage sampling circuit, which is used to sample the output voltage of the drain of the first MOS transistor and output it to the controller; The second voltage sampling circuit includes an eighth resistor, a ninth resistor, a tenth resistor, and a seventh capacitor. The first end of the eighth resistor is connected to the drain of the first MOS transistor, and the second end of the eighth resistor is connected to the first end of the ninth resistor and the first end of the tenth resistor. The second end of the ninth resistor is connected to the controller and the first end of the seventh capacitor. The second end of the tenth resistor and the second end of the seventh capacitor are connected to the power supply ground.

[0013] In some embodiments, the valve drive module includes a second MOSFET, a second diode, an eighth capacitor, and a connector; The positive terminal of the connector is connected to the first output terminal, the first terminal of the second diode, and the first terminal of the eighth capacitor. The negative terminal of the connector is connected to the second terminal of the second diode and the drain of the second MOS transistor. The source of the second MOS transistor is connected to the controller through a resistor and is grounded.

[0014] Secondly, this utility model provides a pneumatic comfort system, including an air source device, an air valve, and an air-using unit. The air source device is fluidly connected to the air-using unit through the air valve, and the air valve controls the air-using unit to charge and discharge air. The air source device and the air valve are controlled by the aforementioned pneumatic comfort system control circuit.

[0015] The pneumatic comfort system control circuit and pneumatic comfort system of this invention achieve the following effects: The pneumatic comfort system control circuit of this invention includes an air source drive module, an air valve drive module, a high-side drive module, and a controller; wherein, the high-side drive module has a first input terminal, a first output terminal, and a first power supply terminal, the first power supply terminal is connected to an external power source for power, and the first output terminal is connected to the air source drive module and the air valve drive module for power supply; the controller is enabled connected to the air source drive module and the air valve drive module, and the controller is connected to the first input terminal and controls the operation of the air source drive module and / or the air valve drive module through the high-side drive module. This invention, by integrating the high-side drive module to uniformly control the air source drive module and the air valve drive module, and combining multi-level protection circuits and diagnostic feedback mechanisms, effectively simplifies the circuit structure, reduces hardware costs and layout complexity, and improves system reliability and integration.

[0016] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. Attached Figure Description

[0017] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the control circuit of the pneumatic comfort system according to an embodiment of the present invention; Figure 2 This is a circuit schematic diagram of the high-side driving module according to an embodiment of the present invention; Figure 3 This is a circuit diagram of the air source drive module according to an embodiment of the present utility model; Figure 4 This is a circuit diagram of the valve drive module according to an embodiment of the present invention.

[0018] Figure label: 100. Controller; 200. High-side drive module; 300. Air source drive module; 400. Air valve drive module; 210. First protection circuit; 220. Second protection circuit; 230. First voltage sampling circuit; 240. Diagnostic protection circuit; U1, high-side driver chip; FB1, first ferrite bead; FB2, second ferrite bead; Q1, first MOSFET; Q2, second MOSFET; Q3, first transistor; J1, connector; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; R8, eighth resistor; R9, ninth resistor; R10, tenth resistor; C1, first capacitor; C2, second capacitor; C3, third capacitor; C4, fourth capacitor; C5, fifth capacitor; C6, sixth capacitor; C7, seventh capacitor; C8, eighth capacitor; D1, first Zener diode; D2, first diode; D3, transient voltage suppressor diode; D4, second diode. Detailed Implementation

[0019] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of this utility model can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the spirit of this utility model and should not be regarded as an improper limitation of this utility model.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the specific technical solutions of this utility model will be further described in detail below with reference to the accompanying drawings of the embodiments of this utility model. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0021] In the embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the same feature. In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] Furthermore, in this embodiment of the invention, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0023] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0024] In embodiments of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0025] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0026] Figure 1 This illustration shows an embodiment of the pneumatic comfort system control circuit of the present invention, which includes an air source drive module 300, an air valve drive module 400, a high-side drive module 200, and a controller 100. The high-side drive module 200 has a first input terminal HSD_IN, a first output terminal HSD_OUT, and a first power supply terminal. The first power supply terminal is connected to an external power source, and the first output terminal supplies power to the air source drive module 300 and the air valve drive module 400. The controller 100 controls the operating state of the high-side drive module 200 through the first input terminal and is connected to the air source drive module 300 and the air valve drive module 400 respectively to achieve independent control.

[0027] In this embodiment of the invention, the high-side drive module 200 refers to a circuit unit with power distribution and switching control functions, specifically implemented using an integrated high-side drive chip U1, which controls the on / off state of the power path through an internal power transistor. The air source drive module 300 refers to a drive circuit connected to an air pump or other air supply device, specifically implemented using a switching circuit combining a MOSFET and a transistor, which controls the start and stop of the air pump through a signal from the controller 100. The air valve drive module 400 refers to a drive circuit connected to a solenoid valve, specifically implemented using a switching circuit combining a MOSFET and a connector J1, which controls the on / off state of the solenoid valve through a signal from the controller 100. The controller 100 refers to a control unit with logic processing capabilities, specifically implemented using a microcontroller 100 or a dedicated integrated circuit, which controls the coordinated operation of each drive module through output level signals.

[0028] Specifically, an external power supply is connected through the first power terminal of the high-side drive module 200, and the controller 100 activates the high-side drive module 200 by sending an enable signal through its first input terminal. The first output terminal of the high-side drive module 200 simultaneously provides operating power to both the air source drive module 300 and the air valve drive module 400. When the air pump needs to be started, the controller 100 sends a control signal to the air source drive module 300, and simultaneously establishes a power supply circuit through the high-side drive module 200. For the control of the solenoid valve, the controller 100 independently sends a control signal to the air valve drive module 400, and maintains the power supply path through the high-side drive module 200. This architecture allows the air pump and solenoid valve to share the same power supply channel while maintaining independent control logic, and achieves power path reuse through the centralized management of the high-side drive module 200. In this embodiment, the specific working principle of this utility model is as follows: The controller 100 outputs an EN signal to enable the high-side drive module 200 to operate. Simultaneously, the controller 100 controls the second MOSFET Q2 of the valve drive module 400 to connect the valve to the BAT power supply and ground, forming a loop, and the valve actuates. The high-side driver outputs a feedback signal to the controller 100 through the diagnostic protection circuit 240, transmitting current, fault, and other statuses back to the controller 100 for real-time monitoring to ensure system safety.

[0029] The controller 100 outputs an EN signal to enable the high-side drive module 200 to operate. Simultaneously, the controller 100 controls the first MOSFET Q1 of the air source drive module 300 to turn on or off, thereby controlling the start and stop of the air pump. The first MOSFET Q1 acts as a switch to control the power supply path of the air pump, thereby enabling the pump to start and stop. Furthermore, the pump speed can be adjusted by combining it with pulse width modulation.

[0030] Compared with existing technologies, traditional solutions require separate high-side drivers for the air pump and solenoid valve, with each driver needing independent power input, power output, and diagnostic circuitry. This solution supports both types of loads simultaneously through a single high-side driver module 200, eliminating redundant power input circuitry and diagnostic modules. The power output terminals of the two drivers in the traditional solution are integrated into a single output terminal in this solution, significantly reducing the number of discrete components in the power path. Furthermore, the control signal transmission path is optimized from two independent channels to a centralized control mode sharing the high-side driver module 200.

[0031] Through the above technical solution, this utility model achieves effective integration of drive resources, merging the two high-side drivers in the discrete architecture into a single module, greatly reducing the number of power devices used. Reduced circuit layout complexity leads to a reduction in printed circuit board area requirements, effectively controlling hardware costs. The integrated design improves the reliability of the power path while retaining the independent control capabilities of the air pump and solenoid valve, achieving system miniaturization while ensuring functional integrity.

[0032] In some embodiments, see Figure 2 The high-side drive module 200 includes a high-side drive chip U1, a first protection circuit 210, and a second protection circuit 220. A first input terminal, a first output terminal, and a first power supply terminal are disposed on the high-side drive chip U1. The first input terminal is connected to the controller 100 through a first resistor R1. The first power supply terminal is connected to an external power source through the first protection circuit 210 to obtain power. The first output terminal is connected to the air source drive module 300 and / or the air valve drive module 400 for power supply through the second protection circuit 220.

[0033] In this embodiment of the invention, the high-side drive chip U1 refers to a semiconductor device integrating power management and drive functions. Specifically, it can be implemented using an intelligent drive chip with an input control terminal, a power interface, and a power output terminal, completing power path control and load drive with a single chip. The first protection circuit 210 refers to a power input filtering circuit, which can be implemented using a π-type filter combining ferrite beads and capacitors to suppress high-frequency interference and voltage spikes on the power line. The second protection circuit 220 refers to an output filtering and surge suppression circuit, which can be implemented using a topology combining multi-stage ferrite beads and parallel capacitors to eliminate electromagnetic interference at the output and absorb transient voltages generated by load switching.

[0034] Specifically, the high-side driver chip U1 receives control signals through its first input terminal and, after internal logic processing, controls the conduction state between the first power supply terminal and the first output terminal. The first protection circuit 210 is connected between the external power supply and the high-side driver chip U1, using a ferrite bead to suppress conducted interference and a capacitor to filter out high-frequency noise. The second protection circuit 220 is located between the output terminal of the high-side driver chip U1 and the load, employing a multi-stage filtering structure to reduce electromagnetic interference at the output terminal and absorbing energy generated by sudden load changes through a parallel capacitor. The integrated design of the high-side driver chip U1 replaces traditional discrete driver devices, and the two-stage protection circuits provide electromagnetic compatibility protection at the power supply input and load output terminals, respectively.

[0035] Through the above technical solution, this utility model effectively reduces the design complexity of the aerodynamic comfort system drive circuit. By combining an integrated drive chip with a standardized protection circuit, it reduces the board area occupied while ensuring the system's anti-interference capability. The two-stage protection circuit specifically suppresses the interference characteristics at the power input and load output terminals, avoiding the problem of repeatedly deploying filter components in traditional discrete protection schemes, thus achieving both hardware cost optimization and system reliability improvement.

[0036] In one embodiment of the above embodiments, the first protection circuit 210 includes a first ferrite bead FB1 and at least one first capacitor C1. The first end of the first ferrite bead FB1 is connected to an external power supply, and the second end of the first ferrite bead FB1 is connected to a first power supply terminal and the first end of the first capacitor C1. The second end of the first capacitor C1 is connected to the power supply ground.

[0037] In this embodiment, the first magnetic bead FB1 refers to a magnetic element used to suppress high-frequency noise, specifically a ferrite bead, which reduces electromagnetic interference in the power supply line by absorbing high-frequency interference signals. The first capacitor C1 refers to an energy storage element used to filter out power supply ripple, specifically an electrolytic capacitor or a ceramic capacitor, which smooths power supply voltage fluctuations through charging and discharging.

[0038] Specifically, the external power supply is connected to the power supply terminal of the high-side driver chip U1 through the first ferrite bead FB1. The ferrite bead suppresses high-frequency noise in the power line, preventing interference signals from entering the internal circuitry of the driver chip. The first capacitor C1 is connected in parallel between the power supply terminal and ground, forming a low-impedance loop to filter out low-frequency ripple and transient interference in the power supply, ensuring the power supply stability of the high-side driver chip U1. The combination of the ferrite bead and the capacitor forms a two-stage filtering structure at the power input terminal, taking into account both high-frequency and low-frequency noise suppression requirements.

[0039] Through the above technical solution, this utility model effectively suppresses conducted interference in the power supply line, avoids high-frequency noise affecting the internal logic circuit of the high-side drive chip U1, and filters out voltage instability caused by power fluctuations, ensuring the reliable operation of the air source drive module 300 and the air valve drive module 400. This design reduces the number of discrete components while achieving power protection, which is beneficial for the miniaturization and integration of the control circuit.

[0040] In one embodiment of the above embodiments, the second protection circuit 220 includes a second magnetic bead FB2, at least one second capacitor C2, and at least one third capacitor C3; the first end of the second magnetic bead FB2 is connected to the first output terminal and the first end of the second capacitor C2, and the second end of the second magnetic bead FB2 is connected to the air source drive module 300 and / or the air valve drive module 400; the first end of the third capacitor C3 is connected to the second end of the second magnetic bead FB2; and the second ends of the second capacitor C2 and the third capacitor C3 are both connected to the power supply ground.

[0041] In this embodiment, the second magnetic bead FB2 is a magnetic element used to suppress high-frequency noise, specifically a ferrite bead, which absorbs high-frequency interference energy and converts it into heat energy, reducing electromagnetic interference in the power supply line. The second capacitor C2 is an energy storage element used to filter low-frequency interference, specifically an electrolytic capacitor, which stabilizes the supply voltage through charging and discharging. The third capacitor C3 is an energy storage element used to filter high-frequency interference, specifically a ceramic capacitor, which responds quickly to high-frequency fluctuations due to its low equivalent series resistance. The combination of the second magnetic bead FB2, the second capacitor C2, and the third capacitor C3 forms a multi-stage filtering structure, covering the interference suppression requirements of different frequency bands and ensuring the power supply stability of the air source drive module 300 and the air valve drive module 400.

[0042] Specifically, the first end of the second ferrite bead FB2 is connected to the first output terminal of the high-side drive chip U1, and the second end of the second ferrite bead FB2 is connected to the power input terminal of the air source drive module 300 or the air valve drive module 400. The second capacitor C2 is connected between the first end of the second ferrite bead FB2 and the power ground to filter out low-frequency voltage fluctuations; the third capacitor C3 is connected between the second end of the second ferrite bead FB2 and the power ground to filter out high-frequency voltage spikes. Through the blocking effect of the second ferrite bead FB2 on high-frequency interference, combined with the graded filtering of different frequency interferences by the second capacitor C2 and the third capacitor C3, conducted interference at the output terminal of the high-side drive module 200 can be effectively suppressed, preventing malfunctions or performance degradation of the air source drive module 300 or the air valve drive module 400 due to power supply noise.

[0043] Through the above technical solution, this utility model solves the problem of insufficient power line interference suppression in discrete drive architecture. By optimizing power quality through multi-stage filtering design, it reduces the failure rate of pneumatic actuators caused by unstable power supply, while reducing the number of discrete filtering components used, which is beneficial to the miniaturization and cost control of control circuits.

[0044] In one embodiment of the above example, the high-side driving module 200 further includes a first voltage sampling circuit 230, which is used to sample the output voltage of the first output terminal and output it to the controller 100. The first voltage sampling circuit 230 includes a second resistor R2, a third resistor R3, a fourth resistor R4, and a fourth capacitor C4. The first end of the second resistor R2 is connected to the first output terminal, and the second end of the second resistor R2 is connected to the first end of the third resistor R3 and the first end of the fourth resistor R4. The second end of the third resistor R3 is connected to the high-side detection terminal HSD_V of the controller 100 and the first end of the fourth capacitor C4. The second end of the fourth resistor R4 and the second end of the fourth capacitor C4 are connected to the power supply ground.

[0045] In this embodiment, the second resistor R2 refers to the current-limiting element used for voltage division sampling, which can be implemented using a metal film resistor, and the output voltage signal is obtained through series voltage division.

[0046] The third resistor R3 refers to the signal conditioning element, which can be implemented using a surface-mount resistor. It is used to transmit the voltage-divided signal to the controller 100 and limit the input current.

[0047] The fourth resistor R4 is a pull-down resistor, which can be implemented using a thick-film resistor. It is used in conjunction with the fourth capacitor C4 to form a low-pass filter circuit.

[0048] The fourth capacitor C4 refers to a filter element, which can be implemented using a ceramic capacitor to filter out high-frequency noise interference in the sampled signal.

[0049] Specifically, when the high-side drive module 200 is working, the output voltage at the first output terminal is attenuated by a voltage divider network consisting of the second resistor R2, the third resistor R3, and the fourth resistor R4. The divided signal is then transmitted to the analog-to-digital conversion port of the controller 100 via the third resistor R3. The first output terminal can be the second terminal of the second ferrite bead FB2. The RC filter network formed by the fourth resistor R4 and the fourth capacitor C4 in parallel effectively suppresses high-frequency interference in the circuit, ensuring the stability of the sampled signal. Therefore, the controller 100 can acquire the filtered voltage sample value in real time and perform closed-loop control or fault diagnosis based on this value.

[0050] Through the above technical solution, this utility model achieves accurate sampling and effective filtering of the high-side drive output voltage, solves the problems of complex sampling circuit and insufficient anti-interference capability in traditional solutions, and improves the accuracy and reliability of pressure control in aerodynamic comfort systems.

[0051] In one embodiment of the above embodiments, the high-side drive module 200 further includes a diagnostic protection circuit 240; the high-side drive chip U1 is further provided with a first diagnostic terminal U1_DEN and a first feedback terminal U1_IS. The first diagnostic terminal is connected to the controller 100 through a fifth resistor R5 to obtain the diagnostic signal of the controller 100; the first feedback terminal is connected to the controller 100 through the diagnostic protection circuit 240 to output a feedback signal; wherein, the diagnostic protection circuit 240 includes a sixth resistor R6, a seventh resistor R7, a first Zener diode D1 and a fifth capacitor C5; the first end of the sixth resistor R6 is connected to the first feedback terminal and the first end of the seventh resistor R7, and the second end of the sixth resistor R6 is connected to the first end of the first Zener diode D1, the first end of the fifth capacitor C5 and the controller 100; the second end of the first Zener diode D1, the second end of the fifth capacitor C5 and the second end of the seventh resistor R7 are all connected to the power supply ground.

[0052] In this embodiment, the diagnostic protection circuit 240 refers to the protective circuit used to process the feedback signal of the high-side driver chip U1. Specifically, it can be implemented by using the sixth resistor R6 for current limiting, the seventh resistor R7 for voltage division regulation, the first Zener diode D1 for voltage clamping, and the fifth capacitor C5 for high-frequency filtering. This circuit ensures that the feedback signal received by the controller 100 is within a safe operating range by limiting the feedback loop current, stabilizing the signal voltage, and filtering out high-frequency interference.

[0053] Specifically, when the high-side driver chip U1 is running, the feedback signal output from the first feedback terminal is sequentially current-limited by the sixth resistor R6 and voltage-divided by the seventh resistor R7. The first Zener diode D1 clamps the signal voltage within a preset threshold to prevent overvoltage from impacting the input port of the controller 100. The fifth capacitor C5 is connected in parallel between the signal line and ground to filter out high-frequency noise in the signal. This forms a multi-level protection mechanism, realizing overvoltage suppression, surge absorption, and noise filtering functions along the signal transmission path.

[0054] Through the above technical solution, this utility model effectively solves the problems of overvoltage risk and noise interference in the feedback signal transmission process, simplifies the circuit structure, improves the reliability of signal transmission, and reduces the probability of controller 100 being damaged due to abnormal voltage.

[0055] In some embodiments, see Figure 3The air source drive module 300 includes a first MOSFET Q1, a first transistor Q3, a first diode D2, a transient suppression diode D3, and a sixth capacitor C6. The base of the first transistor Q3 is connected to the air pump control terminal PUMP_PWM of the controller 100 through a resistor, the collector is connected to the gate of the first MOSFET Q1 through a resistor, and the emitter is grounded. The source of the first MOSFET Q1 is connected to the first power supply terminal, and the drain is connected to the air source device PUMP_OUT+, the first terminal of the first diode D2, the first terminal of the transient suppression diode D3, and the first terminal of the sixth capacitor C6. The second terminals of the first diode D2, the second terminal of the transient suppression diode D3, and the second terminal of the sixth capacitor C6 are connected to the power supply ground.

[0056] In this embodiment, the first MOSFET Q1 is a metal-oxide-semiconductor field-effect transistor, specifically an N-channel enhancement-mode MOSFET, used to control the power supply switching of the gas source device. The first transistor Q3 is a bipolar junction transistor, specifically an NPN transistor, used to receive control signals and drive the gate voltage of the first MOSFET Q1. The first diode D2 is a rectifier diode, specifically a silicon-based fast recovery diode, used to prevent reverse current from damaging the gas source device. The transient suppression diode D3 is a voltage clamping protection device, specifically a bidirectional TVS diode, used to absorb voltage spikes generated when the gas source device starts and stops. The sixth capacitor C6 is a filter capacitor, specifically an electrolytic capacitor, used to stabilize the power supply voltage of the gas source drive module 300.

[0057] Specifically, when the controller 100 outputs a high-level signal to the base of the first transistor Q3, Q3 turns on, and its collector voltage is pulled down to a low level, creating a forward bias voltage between the gate and source of the first MOSFET Q1, causing the MOSFET to turn on. At this time, the external power supply supplies power to the gas source device through the first power supply terminal, and the gas source device starts working. When the controller 100 outputs a low-level signal, the first transistor Q3 turns off, the gate voltage of the first MOSFET Q1 is pulled up to the source voltage, the first MOSFET Q1 turns off, and the gas source device stops operating. The first diode D2 blocks the reverse current path when the MOSFET is turned off, and the transient suppression diode D3 and the sixth capacitor C6 work together to suppress the transient overvoltage generated by the inductive load of the gas source device, preventing the MOSFET from being damaged.

[0058] Through the above technical solutions, this utility model effectively reduces the hardware cost of the gas source drive module 300, simplifies the circuit layout, and improves the anti-interference capability and reliability of the gas source device under frequent start-stop conditions through multi-level protection design.

[0059] In one embodiment of the above example, the air source drive module 300 further includes a second voltage sampling circuit. The second voltage sampling circuit is used to sample the output voltage of the drain of the first MOSFET Q1 and output it to the air pump detection terminal PUMP_V of the controller 100. The second voltage sampling circuit includes an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and a seventh capacitor C7. The first end of the eighth resistor R8 is connected to the drain of the first MOSFET Q1, and the second end of the eighth resistor R8 is connected to the first end of the ninth resistor R9 and the first end of the tenth resistor R10. The second end of the ninth resistor R9 is connected to the controller 100 and the first end of the seventh capacitor C7. The second end of the tenth resistor R10 and the second end of the seventh capacitor C7 are connected to the power supply ground.

[0060] In this embodiment, the eighth resistor R8 refers to the current-limiting voltage divider resistor connected in series in the sampling circuit. Specifically, it can be implemented using a 10kΩ surface-mount resistor, used to convert the high-voltage signal into a low-voltage range suitable for processing by the controller 100. The ninth resistor R9 and the tenth resistor R10 are matching resistors forming the voltage divider network, used to establish accurate voltage division coefficients. The seventh capacitor C7 is a filter capacitor connected in parallel at the signal output terminal, specifically a ceramic capacitor, used to eliminate high-frequency interference and stabilize the sampling signal.

[0061] Specifically, when the gas source drive module 300 is working, the drive voltage output from the drain of the first MOSFET Q1 enters the voltage divider network through the eighth resistor R8. The eighth resistor R8, together with the ninth resistor R9 and the tenth resistor R10, forms a series voltage divider structure, proportionally attenuating the operating voltage of the gas source device to a voltage range recognizable by the controller 100. The voltage signal after voltage division is transmitted to the analog input port of the controller 100 via the ninth resistor R9. At the same time, the seventh capacitor C7 performs high-frequency filtering on the voltage divider node to avoid electromagnetic interference affecting the sampling accuracy. Thus, the controller 100 can obtain the actual drive voltage of the gas source device in real time and determine whether there is an overvoltage or undervoltage abnormality according to a preset algorithm.

[0062] Through the above technical solution, this utility model can continuously monitor the driving voltage status of the air source device during operation and promptly detect voltage anomalies caused by changes in line impedance or power fluctuations. This design not only avoids the increased cost associated with an independent voltage detection module but also improves system reliability by simplifying the signal conditioning circuit, ensuring the stable operation of the pneumatic comfort system under complex operating conditions.

[0063] In some embodiments, see Figure 4The air valve drive module 400 includes a second MOSFET Q2, a second diode D4, an eighth capacitor C8, and a connector J1. The positive terminal J1+ of the connector J1 is connected to the first output terminal, the first terminal of the second diode D4, and the first terminal of the eighth capacitor C8. The negative terminal J1- of the connector J1 is connected to the second terminal of the second diode D4 and the drain of the second MOSFET Q2. The source of the second MOSFET Q2 is connected to the air valve control terminal PWM1_EN of the controller 100 through a resistor, and the source is grounded.

[0064] In this embodiment, the second MOSFET Q2 refers to a metal-oxide-semiconductor field-effect transistor, specifically an N-channel enhancement-mode MOSFET, serving as the power switching device in the valve drive circuit, controlling the valve's on / off state via gate voltage. The second diode D4 refers to a freewheeling diode, specifically a fast recovery diode, used to release the coil's reverse electromotive force when the MOSFET is turned off. The eighth capacitor C8 refers to a filter capacitor, specifically an electrolytic capacitor, used to suppress high-frequency interference at the power supply end. The connector J1 refers to an electrical interface component, specifically a terminal block or plug-in connector, used to establish the physical connection between the valve and the control circuit.

[0065] Specifically, when the controller 100 outputs a high-level signal, the gate of the second MOSFET Q2 receives a driving voltage through a current-limiting resistor, causing the drain and source to conduct. Current flows from the first output terminal of the high-side drive module 200 through the positive terminal of connector J1 to the air valve coil, and then through the negative terminal of connector J1 through the second MOSFET Q2 to ground, thereby driving the air valve to open. When the controller 100 outputs a low-level signal, the second MOSFET Q2 is turned off, and the reverse electromotive force generated by the air valve coil forms a freewheeling circuit through the second diode D4, preventing voltage spikes from damaging the device. The eighth capacitor C8 is connected in parallel between the positive terminal of connector J1 and ground, which can absorb high-frequency noise on the power line and ensure the stability of the air valve drive signal.

[0066] In some specific embodiments, the rated current of the second diode D4 can be 1.5 times the maximum operating current of the gas valve, for example, using a 1N5819 diode; the capacitance value of the eighth capacitor C8 can be set from 10μF to 100μF, for example, using an aluminum electrolytic capacitor; the contact material of the connector J1 can be a gold-plated copper alloy to improve conductivity and corrosion resistance.

[0067] Compared to existing technologies, conventional valve drive circuits typically require a separate high-side drive chip U1 in conjunction with external power transistors and protection circuits, resulting in a large number of components and a complex PCB layout. This solution directly utilizes the output of the high-side drive module 200 for power supply and employs a single MOSFET and a freewheeling diode to form the drive circuit, eliminating redundant drive chips and external circuits and significantly simplifying the hardware structure while maintaining the same driving capability.

[0068] Through the above technical solution, this utility model achieves a high degree of integration of the air valve drive circuit, reduces the number of discrete components used, lowers material costs and circuit board space occupation, and effectively suppresses electromagnetic interference through the synergistic effect of freewheeling diodes and filter capacitors, thereby improving the reliability and stability of air valve control.

[0069] In some embodiments, this utility model provides an embodiment of a pneumatic comfort system. The pneumatic comfort system includes an air source device, an air valve, and an air-using unit. The air source device is fluidly connected to the air-using unit through the air valve. The air valve controls the air-using unit to charge and discharge air. The air source device and the air valve are controlled by the pneumatic comfort system control circuit described above. The pneumatic comfort system control circuit includes an air source drive module 300, an air valve drive module 400, a high-side drive module 200, and a controller 100. The high-side drive module 200 has a first input terminal, a first output terminal, and a first power terminal. The first power terminal is connected to an external power source for power. The first output terminal is connected to the air source drive module 300 and the air valve drive module 400 for power supply. The controller 100 is enabled and connected to the air source drive module 300 and the air valve drive module 400. The controller 100 is connected to the first input terminal and controls the operation of the air source drive module 300 and / or the air valve drive module 400 through the high-side drive module 200.

[0070] In this embodiment of the invention, the gas source drive module 300 refers to a circuit unit powered by the high-side drive module 200 and controlled by the controller 100. Specifically, it can be implemented using a topology including MOSFETs, transistors, and protection components, and is used to drive the gas source device to start and stop. The valve drive module 400 refers to a circuit unit powered by the high-side drive module 200 and controlled by the controller 100. Specifically, it can be implemented using a topology including MOSFETs, diodes, and connector J1, and is used to control the on / off state of the valve. The high-side drive module 200 refers to a circuit unit integrating power input, output, and protection functions. Specifically, it can be implemented using a combination structure including a drive chip, ferrite bead, capacitor, and sampling circuit, and is used to provide unified power supply and status monitoring for the gas source drive module 300 and the valve drive module 400. The controller 100 refers to a control unit that coordinates the actions of the gas source device and the valve. Specifically, it can be implemented using a microprocessor or a dedicated control chip, and by receiving feedback signals and outputting control commands, it achieves system operating state adjustment.

[0071] Specifically, the gas source device forms a fluid path with the gas-consuming unit through a gas valve. The on / off state of the gas valve is controlled by the gas valve drive module 400, and the start / stop of the gas source device is controlled by the gas source drive module 300. The high-side drive module 200 is connected to an external power source through its first power terminal and supplies power to the gas source drive module 300 and the gas valve drive module 400 through its first output terminal. The controller 100 sends a control signal through the first input terminal of the high-side drive module 200 and simultaneously receives voltage sampling and diagnostic feedback signals from the high-side drive module 200, thereby achieving coordinated control of the gas source device and the gas valve. For example, when inflation is required, the controller 100 activates the gas source drive module 300 through the high-side drive module 200, causing the gas source device to operate, and simultaneously controls the gas valve drive module 400 to open the corresponding gas valve, delivering gas to the gas-consuming unit; when shutdown is required, the controller 100 cuts off the drive signal and monitors the system status.

[0072] Through the above technical solution, this utility model solves the problems of high hardware cost, complex layout and low resource utilization caused by the discrete drive architecture of existing pneumatic comfort systems. By coordinating the integrated high-side drive module 200 with the controller 100, efficient drive and status monitoring of the air source device and air valve are realized, reducing the complexity of electronic hardware design, and improving the reliability and economy of the system.

[0073] The sequence numbers of the above-mentioned embodiments of this utility model are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A control circuit for a pneumatic comfort system, characterized in that, include: A gas source drive module is used to connect to the gas source device enable function to control the operation of the gas source device. A valve drive module is used to connect with a valve enable to control the operation of the valve. The high-side drive module is provided with a first input terminal, a first output terminal and a first power terminal. The first power terminal is connected to an external power source for power supply, and the first output terminal is connected to the air source drive module and the air valve drive module for power supply. The controller is connected to the air source drive module and the air valve drive module, and the controller is connected to the first input terminal of the high-side drive module and controls the operation of the air source drive module and / or the air valve drive module through the high-side drive module.

2. The pneumatic comfort system control circuit according to claim 1, characterized in that, The high-side driving module includes a high-side driving chip, a first protection circuit, and a second protection circuit. The first input terminal, the first output terminal, and the first power supply terminal are disposed on the high-side driving chip. The first input terminal is connected to the controller through a first resistor. The first power supply terminal is connected to an external power source through a first protection circuit. The first output terminal is connected to the air source driving module and / or the air valve driving module through a second protection circuit for power supply.

3. The pneumatic comfort system control circuit according to claim 2, characterized in that, The first protection circuit includes a first ferrite bead and at least one first capacitor; The first end of the first magnetic bead is connected to an external power source, and the second end of the first magnetic bead is connected to the first power source and the first end of the first capacitor. The second end of the first capacitor is connected to the power source ground.

4. The pneumatic comfort system control circuit according to claim 2, characterized in that, The second protection circuit includes a second ferrite bead, at least one second capacitor, and at least one third capacitor; The first end of the second magnetic bead is connected to the first output terminal and the first end of the second capacitor, and the second end of the second magnetic bead is connected to the air source drive module and / or the air valve drive module. The first end of the third capacitor is connected to the second end of the second magnetic bead, and the second ends of the second capacitor and the second ends of the third capacitor are both connected to the power supply ground.

5. The pneumatic comfort system control circuit according to claim 2, characterized in that, The high-edge driving module further includes a diagnostic protection circuit; the high-edge driving chip also has a first diagnostic terminal and a first feedback terminal, the first diagnostic terminal is connected to the controller through a fifth resistor to obtain the controller's diagnostic signal; the first feedback terminal is connected to the controller through the diagnostic protection circuit to output a feedback signal; The diagnostic protection circuit includes a sixth resistor, a seventh resistor, a first Zener diode, and a fifth capacitor. The first end of the sixth resistor is connected to the first feedback terminal and the first end of the seventh resistor, and the second end of the sixth resistor is connected to the first end of the first Zener diode, the first end of the fifth capacitor, and the controller. The second ends of the first Zener diode, the fifth capacitor, and the seventh resistor are all connected to the power supply ground.

6. The pneumatic comfort system control circuit according to claim 1, characterized in that, The high-side driving module further includes a first voltage sampling circuit, which is used to sample the output voltage of the first output terminal and output it to the controller. The first voltage sampling circuit includes a second resistor, a third resistor, a fourth resistor, and a fourth capacitor; the first end of the second resistor is connected to the first output terminal, and the second end of the second resistor is connected to the first end of the third resistor and the first end of the fourth resistor; the second end of the third resistor is connected to the controller and the first end of the fourth capacitor; and the second end of the fourth resistor and the second end of the fourth capacitor are connected to the power supply ground.

7. The pneumatic comfort system control circuit according to claim 1, characterized in that, The gas source drive module includes a first MOSFET, a first transistor, a first diode, a transient suppression diode, and a sixth capacitor; The base of the first transistor is connected to the controller through a resistor, the collector is connected to the gate of the first MOSFET through a resistor, and the emitter is grounded; The source of the first MOS transistor is connected to the first power supply terminal, and the drain is connected to the gas source device, the first terminal of the first diode, the first terminal of the transient suppression diode, and the first terminal of the sixth capacitor. The second terminal of the first diode, the second terminal of the transient suppression diode, and the second terminal of the sixth capacitor are connected to the power supply ground.

8. The pneumatic comfort system control circuit according to claim 7, characterized in that, The gas source drive module further includes a second voltage sampling circuit, which is used to sample the output voltage of the drain of the first MOS transistor and output it to the controller. The second voltage sampling circuit includes an eighth resistor, a ninth resistor, a tenth resistor, and a seventh capacitor. The first end of the eighth resistor is connected to the drain of the first MOS transistor, and the second end of the eighth resistor is connected to the first end of the ninth resistor and the first end of the tenth resistor. The second end of the ninth resistor is connected to the controller and the first end of the seventh capacitor. The second end of the tenth resistor and the second end of the seventh capacitor are connected to the power supply ground.

9. The pneumatic comfort system control circuit according to claim 1, characterized in that, The valve drive module includes a second MOS transistor, a second diode, an eighth capacitor, and a connector; The positive terminal of the connector is connected to the first output terminal, the first terminal of the second diode, and the first terminal of the eighth capacitor. The negative terminal of the connector is connected to the second terminal of the second diode and the drain of the second MOS transistor. The source of the second MOS transistor is connected to the controller through a resistor and is grounded.

10. A pneumatic comfort system, characterized in that, It includes an air source device, an air valve, and an air consumption unit. The air source device is fluidly connected to the air consumption unit through the air valve. The air valve controls the air consumption unit to charge and discharge air. The air source device and the air valve are controlled by the pneumatic comfort system control circuit according to any one of claims 1-9.

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