Functional board, wireless communication module and air conditioner

Abstract

The application discloses a functional board, a wireless communication module and an air conditioner, and relates to the technical field of power supply. The functional board comprises a first power input end, a wireless communication module and a functional module. The wireless communication module comprises a wireless communication chip, a power conversion circuit and a plurality of first power output ends. The input end of the power conversion circuit is connected with the first power input end. The output end of the power conversion circuit is connected with the plurality of first power output ends. The power supply end of the wireless communication chip is connected with any one of the first power output ends. The power conversion circuit converts the first power voltage into a second power voltage. The functional module has a first signal end and a second signal end. The first signal end is connected with the first power input end. The second signal end is electrically connected with the wireless communication chip. The application aims to improve the problem that when 5V peripheral load is compatible with 3.3V driving voltage, space layout and power ripple need to be considered, and to reduce the number of level conversion components and cost.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to a functional board, a wireless communication module, and an air conditioner. Background Technology

[0002] In modern electronic devices, voltage compatibility between different components is a common and critical issue. For example, electronic control modules require a 5V drive voltage to ensure their performance and stability, while WiFi chips operate at a lower 3.3V voltage level. Such differences typically necessitate level-shifting circuits to match the different voltage requirements, thereby ensuring correct signal transmission and stable system operation. However, neither the WiFi chip module nor the display board on which it resides has sufficient space to accommodate too many level-shifting devices. Summary of the Invention

[0003] The main objective of this invention is to propose a functional board, a wireless communication module, and an air conditioner, which aims to improve the problem of balancing space layout and power ripple when 5V peripheral loads are compatible with 3.3V drive voltage, as well as to reduce the number of level conversion components and lower the development and maintenance costs of the functional board.

[0004] To achieve the above objectives, the present invention proposes a functional board, the functional board comprising:

[0005] The first power input terminal is used to connect the first power supply voltage;

[0006] A wireless communication module includes a wireless communication chip, a power conversion circuit, and multiple first power output terminals. The input terminal of the power conversion circuit is connected to a first power input terminal, and the output terminal of the power conversion circuit is connected to multiple first power output terminals. The power supply terminal of the wireless communication chip is connected to any one of the first power output terminals. The power conversion circuit is used to convert the first power supply voltage to a second power supply voltage.

[0007] The functional module has a first signal terminal and a second signal terminal. The first signal terminal is connected to the first power input terminal, and the second signal terminal is electrically connected to the wireless communication chip.

[0008] Optionally, the wireless communication chip includes multiple second power output terminals, and there are multiple functional modules. The first signal terminals of the multiple functional modules are respectively connected to the first power input terminal, and the second signal terminals of the multiple functional modules are connected to at least one second power output terminal.

[0009] Optionally, the plurality of functional modules include a sound prompting circuit, wherein the first signal terminal of the sound prompting circuit is a main power supply terminal, and the second signal terminal of the sound prompting circuit is a driving terminal;

[0010] The power conversion circuit is used to output the second power supply voltage to the driving terminal to drive the sound prompt circuit to work.

[0011] Optionally, the plurality of functional modules include an ambient light circuit, wherein the first signal terminal of the ambient light circuit is the main power supply terminal, and the second signal terminal of the ambient light circuit is the driving terminal;

[0012] The power conversion circuit is used to output the second power supply voltage to the driving terminal to drive the ambient light circuit to work.

[0013] Optionally, the power conversion circuit includes:

[0014] An input filtering circuit, wherein the input terminal of the input filtering circuit is electrically connected to the first power input terminal, is used to filter the first power supply voltage and output it.

[0015] A DC-DC converter circuit, wherein the input terminal of the DC-DC converter circuit is electrically connected to the output terminal of the input filter circuit, and is used to convert the voltage output by the input filter circuit into a voltage and then output it.

[0016] An energy storage circuit, wherein the input terminal of the energy storage circuit is electrically connected to the output terminal of the DC-DC converter circuit, is used to store and output the voltage output by the DC-DC converter circuit;

[0017] An output filter circuit is provided, wherein the input terminal of the output filter circuit is electrically connected to the output terminal of the energy storage circuit, and the output terminal of the output filter circuit is the output terminal of the power conversion circuit, which is used to filter the voltage output by the energy storage circuit and output a second power supply voltage.

[0018] Optionally, the input filtering circuit includes:

[0019] An input filter capacitor, wherein the first terminal of the input filter capacitor, the first power input terminal, and the input terminal of the DC-DC converter circuit are interconnected, and the second terminal of the input filter capacitor is grounded; and / or, the output filter circuit includes:

[0020] An output filter capacitor is provided, with its first terminal electrically connected to the output terminal of the energy storage circuit and its second terminal grounded.

[0021] Optionally, the wireless communication module further includes:

[0022] A touch detection module, wherein the power supply terminal of the touch detection module is electrically connected to any one of the first power output terminals, and the touch detection module is used to output a corresponding touch detection signal when triggered by the user;

[0023] The main control module, wherein the power supply terminal of the main control module is electrically connected to any one of the first power output terminals;

[0024] The main control module is used to receive external signals, process the signals, and output corresponding display control signals.

[0025] Optionally, the sum of the peak currents of multiple functional modules shall not exceed the current output by the power conversion circuit.

[0026] Optionally, the plurality of functional modules further include one or more combinations of an infrared module, a radar module, and a programming module. The functional board is provided with a drive voltage conversion circuit, the input terminal of which is electrically connected to the first power output terminal. The drive voltage conversion circuit is used to output a drive voltage to the infrared module, the radar module, and the programming module.

[0027] The driving voltage conversion circuit is used to convert the second power supply voltage output from the first power supply output terminal into a third power supply voltage.

[0028] Optionally, the drive voltage conversion circuit includes:

[0029] The signal input terminal and the signal output terminal are both electrically connected to the wireless communication module.

[0030] A first pull-up circuit and a second pull-up circuit, wherein the first terminal of the first pull-up circuit, the first terminal of the second pull-up circuit, and the first power input terminal are interconnected;

[0031] A first switching circuit, wherein a first terminal of the first switching circuit is connected to the signal output terminal, and a second terminal of the first switching circuit is connected to the second terminal of the first pull-up circuit;

[0032] A second switching circuit, wherein the first terminal of the second switching circuit is connected to the signal input terminal, and the second terminal of the second switching circuit is connected to the second terminal of the second pull-up circuit;

[0033] The signal output terminal is connected to the second terminal of the first switching circuit, and the signal input terminal is connected to the second terminal of the second switching circuit.

[0034] Optionally, the functional module does not include a level conversion circuit.

[0035] Optionally, the function board may further include:

[0036] A filtering circuit, one end of which is electrically connected to the wireless communication module, and the other end of which is used to connect to a functional module;

[0037] The filtering circuit includes an electrolytic capacitor, which is disposed on the functional board close to the wireless communication module.

[0038] Optionally, the function board is provided with a display module interface for connecting a display module;

[0039] Motor interface, used to connect the motor;

[0040] The wireless communication module is electrically connected to the display module via the first circuit wiring and the display module interface;

[0041] The wireless communication module is electrically connected to the motor via the second circuit wiring and the motor interface.

[0042] Optionally, the function board is further provided with:

[0043] An isolation zone is provided corresponding to the first circuit wiring and the second circuit wiring, and the isolation zone is spaced between the first circuit wiring and the second circuit wiring.

[0044] Optionally, the surface of the function board corresponding to the wireless communication module is further provided with a prohibited wiring area.

[0045] Optionally, the function board is a display board.

[0046] The present invention also proposes a wireless communication module, wherein the wireless communication module is any one of the wireless communication modules described above; the wireless communication module includes:

[0047] Wireless communication chip;

[0048] A power conversion circuit includes an input terminal, a first output terminal, and a second output terminal. The input terminal of the power conversion circuit is electrically connected to the first power input terminal, the first output terminal is electrically connected to the wireless communication chip, and the second output terminal is used to connect to an external functional module.

[0049] The power conversion circuit is used to convert the first power supply voltage and output a second power supply voltage to the first output terminal to power the wireless communication chip, and to convert the first power supply voltage and output a second power supply voltage to the second output terminal to provide power supply voltage for external functional modules and / or to be used as a drive signal.

[0050] The present invention also proposes an air conditioner, which includes the functional board described in any of the above claims, or includes the wireless communication module described in the above claims.

[0051] This invention proposes a functional board, comprising a first power input terminal for receiving a first power supply voltage, a wireless communication module, and a functional module. The wireless communication module includes a wireless communication chip, a power conversion circuit, and multiple first power output terminals. The input terminal of the power conversion circuit is connected to the first power input terminal, and the output terminal of the power conversion circuit is connected to the multiple first power output terminals. The power supply terminal of the wireless communication chip is connected to any one of the first power output terminals. The power conversion circuit is used to convert the first power supply voltage into a second power supply voltage. The functional module has a first signal terminal and a second signal terminal. The first signal terminal is connected to the first power input terminal, and the second signal terminal is electrically connected to the wireless communication chip.

[0052] In practical applications, the power conversion circuit can convert the first power supply voltage to output a second power supply voltage. Besides providing power to the wireless communication chip inside the wireless communication module, it can also drive the functional modules on the function board using the second power supply voltage. Thus, some functional modules that require a 5V drive voltage can be driven with 3.3V, using the first power supply voltage (such as 5V, 12V, etc.) as their power supply voltage. This saves on the number of level conversion circuits and solves the problem of needing dedicated voltage conversion circuits to provide the first power supply voltage for each functional module, thereby saving wiring area on the function board. Furthermore, it eliminates the need for a separate level conversion circuit for each functional module requiring 5V drive, reducing the number of components and lowering development and maintenance costs. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of a module of one embodiment of the functional board of this application;

[0055] Figure 2 This is a schematic diagram of a module according to another embodiment of the functional board of this application;

[0056] Figure 3 This is a schematic diagram of a module of another embodiment of the functional board of this application;

[0057] Figure 4 This is a schematic diagram of a module of another embodiment of the functional board of this application;

[0058] Figure 5This is a schematic diagram of a module according to another embodiment of the functional board of this application;

[0059] Figure 6 This application also provides a schematic diagram of a module of a functional board according to an embodiment.

[0060] Figure 7 This is a detailed circuit diagram of one embodiment of the driving voltage conversion circuit of this application;

[0061] Figure 8 This is a detailed circuit diagram of one embodiment of the power conversion circuit of this application;

[0062] Figure 9 This is a pin definition diagram of an embodiment of the wireless communication module of this application;

[0063] Figure 10 This is a partial ground plane schematic diagram of an embodiment of the functional board of this application;

[0064] Figure 11 This is a schematic diagram of the bottom ground trace of a wireless communication module in an embodiment of the functional board of this application;

[0065] Figure 12 This is a schematic diagram of a module of one embodiment of the functional board of this application.

[0066] Explanation of icon numbers:

[0067] 100. First power input terminal; 200. Wireless communication module; 300. Functional module; 400. Drive voltage conversion circuit; 310. Sound prompt circuit; 320. Ambient light circuit; 10. Wireless communication chip; 20. Power conversion circuit; 30. First power output terminal; 40. Touch detection module; 50. Main control module; 21. Input filter circuit; 22. DC-DC conversion circuit; 23. Energy storage circuit; 24. Output filter circuit.

[0068] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0070] It should be noted that step designations such as S100 and S200 are used in this document for the purpose of more clearly and concisely describing the corresponding content, and do not constitute a substantial limitation on the order. In specific implementation, those skilled in the art may execute S200 first and then S100, etc., but these should all be within the protection scope of this application.

[0071] In electronic devices, voltage compatibility between different components is a common and critical issue. For example, electronic control modules require a 5V drive voltage to ensure their performance and stability, while Wi-Fi chips operate at a lower 3.3V voltage level. Such differences typically necessitate level-shifting circuits to match the different voltage requirements, thereby ensuring correct signal transmission and stable system operation. However, neither the Wi-Fi chip module nor the display board on which it resides has sufficient space to accommodate too many level-shifting devices.

[0072] It should be noted that the function board has multiple functional modules (loads), see reference. Figure 12 The functional modules include, but are not limited to, a wireless communication module 200, a buzzer, ambient light, touch buttons, a stepper motor connected via a motor interface, and a radar module connected via a radar serial port. In this embodiment, the wireless communication module is a WiFi module, integrating WiFi, a display and control MCU, and touch functionality. Since the peripheral loads (functional modules) of the MCU are all driven by 5V, they are incompatible with the drive voltage output by the 3.3V drive circuit. The WiFi module's power supply voltage is provided by the main control board electrically connected to the functional board (5V). WiFi chips generally operate at 3.3V; therefore, the WiFi module's IO pins output a 3.3V drive voltage. However, due to the miniaturized nature of the WiFi module, space constraints prevent the integration of multiple level conversion circuits within the WiFi module to convert the 3.3V drive voltage and output a 5V drive voltage via multiple pins (IO ports) to drive the functional modules electrically connected to the corresponding IO ports. The functional board also has multiple functional modules and cannot provide sufficient space to accommodate multiple level conversion circuits.

[0073] Therefore, the present invention proposes a functional board, with reference to Figure 1 The functional board includes:

[0074] The first power input terminal 100 is used to connect to the first power supply voltage;

[0075] A wireless communication module 200 includes a wireless communication chip 10, a power conversion circuit 20, and multiple first power output terminals 30. The input terminal of the power conversion circuit 20 is connected to a first power input terminal 100, and the output terminal of the power conversion circuit 20 is connected to the multiple first power output terminals 30. The power supply terminal of the wireless communication chip 10 is connected to any one of the first power output terminals 30. The power conversion circuit 20 is used to convert the first power supply voltage to a second power supply voltage.

[0076] The functional module 300 has a first signal terminal and a second signal terminal. The first signal terminal is connected to the first power input terminal 100, and the second signal terminal is electrically connected to the wireless communication chip 10.

[0077] In this embodiment, the wireless communication module 200 can be implemented using a WiFi module, a Bluetooth module, or the like. This embodiment uses a WiFi module, which includes a WiFi chip, i.e., a wireless communication chip 10. The power conversion circuit 20 can be implemented using at least one of a boost circuit, a buck circuit, and a buck-boost circuit. Optionally, the first power input terminal 100 is used to connect to a first power supply voltage (e.g., 5V) provided by the main control board. Therefore, in this embodiment, the power conversion circuit 20 is a buck circuit used to convert the first power supply voltage to a second power supply voltage. In this embodiment, the first power supply voltage is 5V, and the second power supply voltage is 3.3V.

[0078] Specifically, the power conversion circuit 20 within the wireless communication module 200 converts the first power supply voltage connected to the first power input terminal 100 into a second power supply voltage, which is then output to multiple first power output terminals 30 of the wireless communication module 200. The wireless communication chip 10 is connected to the multiple first power output terminals 30 to output the second power supply voltage. Thus, the second power supply voltage can not only be used directly as the operating voltage of the wireless communication chip 10, but also as the driving voltage for the functional module 300 of the functional board. In this embodiment, the first signal terminal of the functional module 300 is electrically connected to the first power input terminal 100, the second signal terminal of the functional module 300 is connected to the wireless communication chip 10, and the wireless communication chip 10 is electrically connected to any one of the first power output terminals 30. Therefore, the functional module 300, which requires a 5V (first power supply voltage) driving voltage, achieves 3.3V (second power supply voltage) driving operation, with the first power supply voltage serving as the power supply voltage. For example, functional module 300 includes a sound prompt circuit 310, which includes a buzzer, a power supply section, and a sound driving circuit. The power supply section is connected to the first power input terminal 100 for receiving a first power supply voltage. The controlled terminal of the sound driving circuit is electrically connected to the first power output terminal 30 of the wireless communication module 200, and the output terminal of the sound driving circuit is electrically connected to the buzzer. When the first power input terminal 100 of the wireless communication module 200 outputs a 3.3V driving voltage, the sound driving circuit connected to the first power input terminal 100 drives the buzzer to operate. In this way, the buzzer circuit, which originally required a 5V driving voltage, can be compatible with a 3.3V voltage drive.

[0079] Understandably, the power conversion circuit 20 can also be located outside the wireless communication module 200 and placed on a functional board. Moving the power conversion circuit 20 outside the wireless communication module 200 eliminates the need for additional pins on the wireless communication module 200 to output 3.3V, reducing the number of pins and thus simplifying the module's design and manufacturing process. Furthermore, WiFi modules are typically small and have limited internal space; moving the power conversion circuit 20 outside the module helps meet the miniaturization requirements of the module.

[0080] In practical applications, the functional modules 300 on the function board can be driven by a second power supply voltage, rather than being limited to the first power supply voltage. This saves the number of level conversion circuits needed to convert the second power supply voltage output from the functional I / O pins of the wireless communication module 200 to the first power supply voltage, thus improving the problem of needing a dedicated voltage conversion circuit to provide the first power supply voltage for each functional module 300 and saving wiring area on the function board. Furthermore, it eliminates the need for a separate level conversion circuit for each functional module 300 requiring a 5V drive voltage. Some functional modules 300 requiring a 5V drive voltage can be driven by 3.3V, using the first power supply voltage (5V) as their main power supply. This reduces the number of components and lowers development and maintenance costs.

[0081] In one embodiment of this application, the wireless communication chip 10 includes a plurality of second power output terminals, and there are a plurality of functional modules 300. The first signal terminals of the plurality of functional modules 300 are respectively connected to the first power input terminal 100, and the second signal terminals of the plurality of functional modules 300 are connected to at least one second power output terminal.

[0082] The functional board is a display board.

[0083] Based on the above embodiments, the second power supply voltage output by the power conversion circuit 20 is output to each functional module 300 via the wireless communication chip 10.

[0084] In this embodiment, the wireless communication chip 10 includes multiple second power output terminals. The second power supply voltage output by the power conversion circuit 20 is output to each functional module 300 via these terminals. The functional modules 300 on the display board may include an infrared module, a radar module, a display module, a touch detection module 40, a programming module, a buzzer, ambient lighting, etc. These multiple functional modules 300 can meet different types of control and interaction needs, thus providing the air conditioner with more diverse functions. The first signal terminals of all multiple functional modules 300 are electrically connected to the first power input terminal 100. Some functional modules 300 can be driven by 3.3V, such as the touch detection module 40, the buzzer, and ambient lighting. Therefore, the second signal terminals of some functional modules 300 can be directly connected to the first power output terminal 30 one-to-one, achieving partial load compatibility with 3.3V voltage drive. Understandably, for functional module 300 requiring a 5V drive voltage, a level conversion circuit can be configured to boost and convert the 3.3V drive voltage output from the first power output terminal 30 (IO pin) of the wireless communication module 200 to a 5V drive voltage, which is then supplied to the corresponding functional module 300 to drive it. Thus, for loads on the display board requiring a 5V drive voltage, this application chooses to make some 5V loads compatible with 3.3V drive voltage, while the voltage requirements of the other loads are met through the level conversion circuit. Compared to traditional solutions where each functional module 300 needs a level conversion circuit, this saves the number of level conversion circuits, thereby saving wiring area and design costs on the functional board.

[0085] Optionally, refer to Figure 2 The multiple functional modules 300 include a sound prompt circuit 310, wherein the first signal terminal of the sound prompt circuit 310 is a main power supply terminal, and the second signal terminal of the sound prompt circuit 310 is a drive terminal;

[0086] The power conversion circuit 20 is used to output the second power supply voltage to the driving terminal to drive the sound prompt circuit 310 to work.

[0087] In this embodiment, the sound prompt circuit 310 can be implemented using a buzzer prompt circuit. The first signal terminal (main power terminal) is used to connect to a 5V main power supply. The second signal terminal (drive terminal) is used to receive a 3.3V drive voltage provided from the first power output terminal 30 of the wireless communication module 200. The buzzer prompt circuit includes a power supply section, a drive circuit, and a buzzer load. The power supply section is connected to the 5V main power supply to ensure the buzzer has sufficient energy reserves to emit sound. The drive circuit may include an NPN transistor or other similar switching device, whose base is connected to the 3.3V drive signal through a current-limiting resistor, its emitter is grounded, and its collector is connected to one end of the buzzer. The other end of the buzzer is directly connected to the 5V main power supply.

[0088] When the wireless communication module 200 needs to trigger an audio prompt, the wireless communication chip 10 inside the module integrates control and communication functions. The chip 10 controls the power conversion circuit 20 to convert 5V to 3.3V and outputs a 3.3V drive signal to the buzzer prompt circuit's drive terminal via the first power output terminal 30. Since a base-emitter voltage exceeding 0.7V is sufficient to turn on the NPN transistor, even a 3.3V drive voltage can activate the transistor and make it conduct. Once the transistor is on, a current path is established between the 5V main power supply and ground, allowing current to flow through the buzzer and causing it to sound. In practical applications, as long as the 3.3V drive signal is output, the transistor will remain on, and the buzzer will continue to operate. When the first power output terminal 30 of the WiFi module stops outputting the drive signal, the transistor turns off, and the buzzer stops sounding.

[0089] Optionally, the plurality of functional modules 300 include an ambient light circuit 320, wherein the first signal terminal of the ambient light circuit 320 is a main power supply terminal and the second signal terminal of the ambient light circuit 320 is a driving terminal.

[0090] The power conversion circuit 20 is used to output the second power supply voltage to the driving terminal to drive the ambient light circuit 320 to work.

[0091] In this embodiment, the first signal terminal (main power terminal) of the ambient light circuit 320 is used to connect to a 12V main power supply, and its second signal terminal (drive terminal) is used to receive a 3.3V drive voltage provided by the first power output terminal 30 of the wireless communication module 200. The ambient light circuit 320 includes a power supply section, a drive circuit, and an LED (or a group of LEDs). The power supply section is connected to a 5V main power supply to ensure that the LED has sufficient energy reserves to emit light. The drive circuit may include an NPN transistor or other similar switching element, whose base is connected to the 3.3V drive signal through a current-limiting resistor, its emitter is grounded, and its collector is connected to one end of the LED. The other end of the LED is directly connected to the 5V main power supply. The ambient light circuit 320 may also include a current regulating resistor, connected in series with the LED, to limit the current through the LED, prevent overcurrent damage to the LED, and achieve brightness adjustment of the LED.

[0092] Specifically, when the wireless communication module 200 needs to trigger the ambient light, the first power output terminal 30 outputs a 3.3V drive signal to the drive terminal of the ambient light circuit 320. Since a base-emitter voltage exceeding 0.7V is sufficient to turn on the NPN transistor, even a 3.3V drive voltage can activate the transistor and make it conduct. Once the transistor is on, a current path is established between the 5V main power supply and ground, allowing current to flow through the LED, thus driving the LED to emit light. As long as the 3.3V drive signal remains high, the transistor will continue to conduct, and the LED will continue to emit light. When the drive signal becomes low (the WiFi module stops outputting the 3.3V drive voltage), the transistor is turned off, and the LED stops emitting light. It can be understood that if the brightness of the ambient light needs to be adjusted, the duty cycle of the 3.3V drive signal can be controlled using PWM (Pulse Width Modulation) technology, thereby adjusting the brightness of the LED.

[0093] It should be noted that the driving circuit inside the sound prompt circuit 310 or ambient light circuit 320 uses switching devices such as transistors or MOSFETs with low threshold voltages. These switching devices can operate normally under the control of a lower driving voltage (such as 3.3V), thereby effectively switching higher load voltages (such as 5V). This application processes the power supply signal (5V) and the driving signal (3.3V) separately. The 5V main power supply provides sufficient power support for the buzzer or LED light, while the 3.3V driving signal is only used to control the operating state of the switching devices (such as transistors), thereby ensuring high-efficiency sound or light output even under a lower control voltage.

[0094] The above settings enable a 5V load (buzzer) to be compatible with a 3.3V drive voltage, improving compatibility between different voltage levels while maintaining system efficiency and reliability. This reduces the need for additional level conversion devices, saving space and lowering costs.

[0095] In another embodiment of this application, reference is made to Figure 3 The power conversion circuit 20 includes:

[0096] An input filter circuit 21 is provided, the input terminal of which is electrically connected to the first power input terminal 100, and is used to filter the first power supply voltage before outputting it.

[0097] DC-DC converter circuit 22, the input terminal of DC-DC converter circuit 22 is electrically connected to the output terminal of input filter circuit 21, and is used to convert the voltage output by input filter circuit 21 into a voltage and then output it.

[0098] Energy storage circuit 23, the input terminal of which is electrically connected to the output terminal of DC-DC converter 22, is used to store and output the voltage output by DC-DC converter 22;

[0099] The output filter circuit 24 is electrically connected to the output terminal of the energy storage circuit 23. The output terminal of the output filter circuit 24 is the output terminal of the power conversion circuit 20. It is used to filter the voltage output by the energy storage circuit 23 and output a second power supply voltage.

[0100] In this embodiment, both the input filter circuit 21 and the output filter circuit 24 can be implemented using at least one or more of resistors, inductors, and capacitors. The DC-DC converter circuit 22 can be implemented using a step-down DC-DC converter chip, which can integrate devices such as a PWM controller and MOSFET switches to achieve high-efficiency voltage conversion. The energy storage circuit 23 can be implemented using any one or more of inductors and capacitors.

[0101] Optionally, the input filtering circuit 21 includes:

[0102] An input filter capacitor, wherein the first terminal of the input filter capacitor, the first power input terminal 100, and the input terminal of the DC-DC converter circuit 22 are interconnected, and the second terminal of the input filter capacitor is grounded; and / or, the output filter circuit 24 includes:

[0103] An output filter capacitor is provided, with its first end electrically connected to the output end of the energy storage circuit 23 and its second end grounded.

[0104] refer to Figure 8The input filter capacitor C1 is used to filter out noise in the first power supply voltage connected to the first power input terminal 100. The step-down converter chip U1, as a DC-DC converter circuit 22, converts the filtered first power supply voltage into a second power supply voltage, that is, it steps down the 5V voltage to output a 3.3V voltage. L, as an energy storage element in the energy storage circuit 23, stores energy during the working cycle of U1 and releases it when needed to maintain the stability of the output voltage. The output filter capacitor C2 is the output filter circuit 24, used to filter out noise in the 3.3V voltage. The power conversion circuit 20 also includes peripheral circuits, such as the anti-reverse current diode D1, to ensure that the current flows from the input terminal to the output terminal of the power conversion circuit 20, preventing reverse current from damaging the components. R8 and R9 form a voltage divider circuit. The feedback terminal FB of U1 is connected to the connection terminal of R1 and R2 to obtain the output voltage and adjust it in real time according to the changes in the output voltage to ensure the stability of the output voltage. R10 and C4 form a power filter circuit to filter out interference signals in the power supply voltage.

[0105] It should be noted that the WiFi module is connected to the first power supply voltage (5V) via the first power input terminal 100. Internally, the power conversion circuit 20 converts this to 3.3V to power the WiFi chip. Simultaneously, the functional I / O pins of the WiFi module output 3.3V, providing a separate 3.3V power interface (I / O pin) for use by the level conversion circuit on the display board. Other power interfaces of the WiFi module can also power peripheral loads requiring a 3.3V drive voltage. In other words, the 3.3V drive voltage can be divided into three parts: driving the WiFi chip, serving as a general I / O to drive peripheral loads, and serving as the input voltage for the level conversion circuit to drive the MOSFET. This allows some 5V peripheral loads to be compatible with the 3.3V drive voltage. Optionally, the sum of the peak currents of the multiple functional modules 300 should not exceed the current output by the power conversion circuit 20. Based on the calculation results of the drive current, the peak current of the three output paths of the 3.3V drive voltage adds up to no more than 350mA, while the upper limit of the current that the WiFi chip can withstand is 500mA. Thus, it can meet the current requirements while being compatible with 3.3V and 5V drives.

[0106] In practical applications, a step-down DC-DC converter chip is used to ensure efficient conversion from 5V to 3.3V, reducing energy loss and heat generation, and meeting the voltage requirements of loads such as WiFi chips that require a 3.3V operating voltage. An input filter capacitor is used to filter out noise from the first power supply voltage connected to the first power input terminal 100, ensuring the purity of the input voltage and reducing interference to subsequent circuits. The output filter capacitor (C2) further improves the stability and smoothness of the output voltage. A voltage divider circuit monitors the output voltage in real time and adjusts it according to changes, ensuring that the output voltage always remains near the set value, improving reliability and stability. Furthermore, the 3.3V drive voltage not only meets the needs of the WiFi chip but also provides stable power support for other loads requiring a 3.3V drive voltage.

[0107] In one embodiment, the wireless communication module 200 further includes:

[0108] A touch detection module 40, the power supply terminal of which is electrically connected to any one of the first power output terminals 30, is used to output a corresponding touch detection signal when triggered by a user.

[0109] The main control module 50 is electrically connected to any one of the first power output terminals 30.

[0110] The main control module 50 is used to receive external signals, process the signals, and output corresponding display control signals.

[0111] In this embodiment, the touch detection module 40 can be implemented using a capacitive touch sensor. The main control module 50 can be implemented using a main controller, such as an MCU, DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), PLC, SOC (System On Chip), etc.

[0112] It should be noted that the main control module 50 can be a display control MCU, and its power supply terminal can be connected to the first power output terminal 30 to receive a 3.3V drive voltage. It is responsible for receiving external signals (such as touch detection signals, infrared remote control signals, etc.), processing these signals, and then outputting corresponding display control signals to control the display screen or other output devices. The power supply terminal of the touch detection module 40 is connected to the first power output terminal 30 of the wireless communication module 200, receives a 3.3V drive voltage, and is used to detect the user's touch actions, transmitting the corresponding touch signals to the main controller of the WiFi chip for processing.

[0113] Specifically, after the air conditioner is turned on, the wireless communication module 200 starts working, preparing to receive instructions from the remote control, mobile application, or other control sources, and providing a 3.3V drive voltage to the touch detection module 40 and a 5V main power supply to the main control module 50. When the user touches a certain area on the touch screen (e.g., the "fan up / down" button), the touch detection module 40 is triggered. The touch detection module 40 senses the finger contact, generating a tiny capacitance change. This change is captured by the internal circuit and output to the main controller, indicating that a touch event has occurred. The main controller reads the information corresponding to the signal provided by the touch detection module 40 to determine the specific button pressed by the user. According to the predefined operation logic, the main control module 50 parses the user's intention (e.g., pressing fan up / down). Upon receiving the button instruction, the main controller processes it and outputs a high level to the corresponding stepper motor, causing the air conditioner louvers to deflect. In addition, the main controller can transmit data with the main control module 50, so that the main control module 50 can send new display content (e.g., the current status of the air conditioner, the set temperature value, etc.) to the display module via SPI or I2C interface, so that the screen reflects the user's selection in real time. It should be noted that the main controller of the WiFi chip can be integrated with the display control MCU on the same chip to reduce wiring area, improve the integration of the wireless communication module 200, and thus reduce the size of the display board. When the display control MCU and the WiFi chip are integrated on the same chip, both are driven by a 3.3V driving voltage; if the touch detection module 40 is a separate chip packaged within the WiFi module, the touch detection module 40 can accept either 3.3V or 5V power supply. Figure 5 As shown, the power supply terminal of the touch detection module 40 can be directly connected to the first power input terminal 100, or, as... Figure 4As shown, the power supply terminal of the touch detection module 40 is electrically connected to the first power output terminal 30. Optionally, the power conversion circuit 20 can provide independent power supply paths for the touch detection module 40, the main control module 50, and the wireless communication chip 10, respectively. That is, the touch detection module 40, the main control module 50, and the wireless communication chip 10 are all electrically connected to different first power output terminals. This ensures that the WIFI chip, the main control module 50, and the touch detection module 40 can obtain stable power under various operating conditions, thereby improving the reliability of the wireless communication module 200. Optionally, modules susceptible to interference can also be powered separately, while the remaining modules share a single power supply path. For example, since the touch detection module 40 is highly sensitive to power supply noise, a dedicated power supply path can be used to power it. Specifically, the main control module 50 and the wireless communication chip 10 share a single power supply path, connected to one first power output terminal 30, while the touch detection module 40 is connected to another first power output terminal 30. This effectively reduces power ripple interference to the touch detection module 40, improving touch detection accuracy and response speed. Furthermore, sharing a single power supply path between the main control module 50 and the wireless communication chip 10 also meets the overall layout and miniaturization requirements of the wireless communication module 200. The specific connection method can be set according to actual needs. Additionally, refer to... Figures 4 to 5 When the display control MCU and the WiFi chip are integrated into the same chip, the main control module 50 controls the first power output terminal 30 to provide driving voltage to each functional module 300. At this time, the WiFi chip only has radio frequency function, which is used to realize the communication connection between the wireless communication module 200 and the external module.

[0114] The above configuration effectively integrates the touch detection module 40 and the main control module 50 (display and control MCU) in the wireless communication module 200, improving user convenience and experience. It not only solves the compatibility problem between different voltage levels but also reduces space requirements and lowers costs.

[0115] In one embodiment, reference Figure 6 The plurality of functional modules 300 further include one or more combinations of an infrared module, a radar module, and a programming module. A drive voltage conversion circuit 400 is provided on the functional board. The input terminal of the drive voltage conversion circuit 400 is electrically connected to the first power output terminal 30. The drive voltage conversion circuit 400 is used to output drive voltage to the infrared module, the radar module, and the programming module.

[0116] The driving voltage conversion circuit 400 is used to convert the second power supply voltage output from the first power supply output terminal 30 into a third power supply voltage.

[0117] In this embodiment, the display board integrates multiple functional modules 300, including but not limited to an infrared module, a radar module, and a programming module. These modules require a 5V drive voltage to ensure their performance and stability. However, the first power output terminal 30 provided by the wireless communication module 200 outputs a stepped-down 3.3V voltage. Therefore, a dedicated drive voltage conversion circuit 400 is needed on the display board to boost the 3.3V voltage to 5V to meet the voltage requirements of each functional module 300.

[0118] The driving voltage conversion circuit 400 includes:

[0119] The signal input terminal and the signal output terminal are both electrically connected to the wireless communication module 200.

[0120] The first pull-up circuit and the second pull-up circuit are interconnected, with the first terminal of the first pull-up circuit, the first terminal of the second pull-up circuit and the first power input terminal 100 interconnected.

[0121] A first switching circuit, wherein a first terminal of the first switching circuit is connected to the signal output terminal, and a second terminal of the first switching circuit is connected to the second terminal of the first pull-up circuit;

[0122] A second switching circuit, wherein the first terminal of the second switching circuit is connected to the signal input terminal, and the second terminal of the second switching circuit is connected to the second terminal of the second pull-up circuit;

[0123] The signal output terminal is connected to the second terminal of the first switching circuit, and the signal input terminal is connected to the second terminal of the second switching circuit.

[0124] refer to Figure 7 The RAD-RXD of the WiFi chip is connected to the signal input terminal, and the RAD-TXD of the WiFi chip is connected to the signal output terminal. The first pull-up circuit is implemented using pull-up resistor R3, the second pull-up circuit is implemented using pull-up resistor R4, and R5 and R6 are current-limiting resistors. The first switching circuit is implemented using MOSFET Q1, and the second switching circuit is implemented using MOSFET Q2.

[0125] In this embodiment, when no signal is received, MOSFETs Q1 and Q2 are both in the off state. At this time, due to the pull-up resistors R3 and R4, the signal output and signal input terminals are pulled high to 5V. Specifically, when the WiFi chip sends a low level (e.g., the WiFi chip does not output a signal), MOSFETs Q1 and Q2 are turned on, causing the signal output terminals to be grounded, forming a low level (0V). At the same time, due to the presence of current-limiting resistors R5 and R6, excessive current is prevented from flowing through MOSFETs Q1 and Q2. When the WiFi chip sends a high level (e.g., 3.3V), MOSFETs Q1 and Q2 are turned off, and the corresponding two signal output terminals are pulled high to 5V by pull-up resistors R3 and R4, respectively. At this time, even if the WiFi chip outputs a 3.3V level, the actual output terminal is still a 5V high level because the MOSFETs are not turned on, and the effect of the pull-up resistors is not affected. After the above level conversion, the 5V drive voltage signal is transmitted to the functional module 300 that requires a 5V drive voltage (such as a radar module, infrared module, etc.). These modules can correctly identify control signals from the WiFi chip, ensuring the normal operation of the system. Furthermore, this application also includes jumpers J61 and J62: if the WiFi chip's IO pins support 5V output, a 5V drive voltage can be directly output through jumpers J61 and J62 to drive the corresponding functional module 300. It should be noted that the third power supply voltage can be 5V or 12V to drive functional loads of different voltage levels.

[0126] It is understood that the functional module 300 does not contain an internal level conversion circuit; instead, it is driven and controlled by an external level conversion circuit on the functional board. This reduces the number of components and the complexity of the layout. It eliminates the need to design and integrate a separate level conversion circuit for each functional module 300, achieving efficient space utilization and cost reduction.

[0127] In practical applications, compatibility between functional modules 300 (such as infrared modules, radar modules, and programming modules) requiring a 5V drive voltage on the display board and the 3.3V drive voltage provided by the wireless communication module 200 was achieved. A dedicated drive voltage conversion circuit 400, combined with MOSFETs as switching elements and pull-up resistors, was used to achieve level conversion, ensuring that each functional module 300 could obtain the required drive voltage, maintaining the system's high efficiency and reliability. This not only solved the compatibility problem between different voltage levels but also maintained the compact design of the display board, reducing space occupation and lowering costs.

[0128] It is important to note that the power supply ripple of the WiFi chip must be controlled within a preset range, such as below 100mV. Excessive power supply ripple can cause instability in the WiFi chip, affecting the quality and stability of the radio frequency signal. In practical applications, electromagnetic interference (EMI) is generated when the WiFi chip receives and transmits radio frequency signals, as well as when stepper motors and fans start and stop. This interference is conducted through the power lines to the WiFi module, causing power supply voltage fluctuations and creating ripple.

[0129] Therefore, refer to Figure 9 The functional board is also provided with:

[0130] A filtering circuit, one end of which is electrically connected to the wireless communication module 200, and the other end of which is used to access the functional module 300;

[0131] The filtering circuit includes an electrolytic capacitor, which is disposed on the function board near the wireless communication module 200.

[0132] In this embodiment, because electrolytic capacitors have a large capacitance (e.g., 100μF), they can store a large amount of charge in a short time and quickly release energy during power supply voltage fluctuations, smoothing the power supply voltage and reducing ripple. Electrolytic capacitors typically have a low equivalent series resistance (ESR), which helps to better absorb high-frequency noise and transient current changes, further improving power quality. Furthermore, compared to other types of capacitors, electrolytic capacitors have a lower cost per unit capacity, making them suitable for filtering needs with larger capacities. Therefore, referring to... Figure 9 In this embodiment, a 100uM electrolytic capacitor is added to the WiFi module side to effectively reduce power supply ripple.

[0133] It should be noted that the internal space of the WIFI module is limited in order to achieve a compact design and easy integration. Adding large-capacity electrolytic capacitors would occupy space, which is not conducive to the miniaturization and integration of the module. In addition, WIFI modules usually use high-density packaging technology, and the internal layout is compact, making it difficult to accommodate additional large-sized components, especially large components like electrolytic capacitors. They are also susceptible to the effects of soldering and other manufacturing processes during production, leading to reliability issues. Therefore, in this embodiment, the electrolytic capacitor is placed near the 3.3V power interface on the display board, especially near the WIFI module side, which can minimize the parasitic inductance and resistance caused by the power line length, thereby improving the filtering effect. By adding an electrolytic capacitor on the display board, an additional filtering path is formed, which works in conjunction with the filtering circuit inside the WIFI module to suppress ripple and noise and improve the overall power quality. The electrolytic capacitor is located near the first power output terminal 30 of the WIFI module on the display control board.

[0134] By adding a 100μF electrolytic capacitor near the 3.3V power interface on the display and control board, especially near the WiFi module, power ripple can be effectively reduced without altering the internal structure of the WiFi module. This ensures stable operation of the WiFi chip and improves the quality and stability of the RF signal. This not only solves the space limitation problem but also optimizes the filtering effect, enhancing the reliability and performance of the air conditioner.

[0135] In another embodiment of this application, reference is made to Figure 10 The function board is equipped with a display module interface for connecting a display module;

[0136] Motor interface, used to connect the motor;

[0137] The wireless communication module 200 is electrically connected to the display module via the first circuit wiring and the display module interface;

[0138] The wireless communication module 200 is electrically connected to the motor via the second circuit wiring and the motor interface.

[0139] The motor interface includes a stepper motor interface for connecting a stepper motor.

[0140] Optionally, the function board is further provided with:

[0141] An isolation zone is provided corresponding to the first circuit wiring and the second circuit wiring, and the isolation zone is spaced between the first circuit wiring and the second circuit wiring.

[0142] In this embodiment, considering that the length of the touch trace is closely related to parasitic capacitance—that is, the touch trace itself, as a conductor, introduces parasitic capacitance—the longer the trace and the smaller its width, the larger the capacitance value, the higher the background noise, and thus the more it affects the touch signal-to-noise ratio. (Reference) Figure 10 One end of the touch trace connects to the display module via the display module interface on the display board, while the other end connects to the WIFI module (also known as the WiFi module). Therefore, in this embodiment, the distance from the touch trace to the display module pins (display module interface, such as pins) is kept as short as possible to reduce unnecessary parasitic capacitance, lower the noise floor level, improve the sensitivity and accuracy of touch response, and thus improve the reliability of the air conditioner.

[0143] Furthermore, the start-stop operation of a stepper motor generates significant current fluctuations and electromagnetic interference, which can be conducted to the touch traces via power or ground lines, affecting their normal operation. Therefore, a ground plane can be laid between the touch traces and the stepper motor traces to form an effective isolation barrier. For example, copper can be poured between the touch traces and the stepper motor traces, filling the ground plane as much as possible. This provides a low-impedance path, helping to quickly absorb transient currents and suppress common-mode noise. It also increases the heat conduction path, aiding in heat dissipation. Alternatively, multiple ground planes can be connected through vias to increase the ground plane area; for example, connecting the top and bottom ground planes ensures the continuity and low impedance characteristics of the entire ground plane.

[0144] It is understandable that during the installation, disassembly, or use of the WiFi module, mechanical stress may occur, causing the copper foil to detach. This risk is especially high during soldering and debugging, where frequent handling increases the likelihood of detachment. If the copper foil detaches and comes into contact with an adjacent conductive path, it may cause a short circuit, leading to malfunction or even damage. Furthermore, the test points on the bottom of the WiFi module, including but not limited to serial port programming, touch detection, and power test points, are typically used during production and debugging to ensure the WiFi module functions correctly. If other signal lines or ground wires are near these areas, accidental contact could lead to malfunctions or short circuits.

[0145] Therefore, in one embodiment of this application, reference is made to Figure 11 The surface of the functional board corresponding to the wireless communication module 200 is also provided with a prohibited wiring area.

[0146] In this embodiment, the prohibited wiring area refers to an area clearly marked in the PCB design, where no signal lines, power lines, or ground lines are allowed to be laid, in order to avoid potential risks to specific locations (such as the test points on the bottom of the WiFi module). This application sets multiple prohibited wiring areas below the WiFi module mounting location, in the area corresponding to the display board, i.e., the side where the display board and WiFi module are attached. Furthermore, the ground line routing also avoids the area where the test points are located (the prohibited wiring area), ensuring that there is no additional copper foil around the test points on the bottom of the WiFi module, reducing the risk of short circuits, and thus ensuring the reliability of the WiFi module's operation.

[0147] The design of the no-wiring zone significantly reduces the risk of copper foil detachment or short circuits at the bottom test points of the WiFi module, ensuring the long-term stable operation of the air conditioner. Furthermore, the ground wire routing avoids the test point area, effectively preventing accidental short circuits and improving circuit safety.

[0148] This application also proposes a wireless communication module 200, wherein the wireless communication module 200 is any of the wireless communication modules 200 described above; the wireless communication module 200 includes:

[0149] Wireless communication chip 10;

[0150] The power conversion circuit 20 includes an input terminal, a first output terminal, and a second output terminal. The input terminal of the power conversion circuit 20 is electrically connected to the first power input terminal 100, the first output terminal is electrically connected to the wireless communication chip 10, and the second output terminal is used to connect to an external functional module 300.

[0151] The power conversion circuit 20 is used to convert the first power supply voltage and output a second power supply voltage to the first output terminal to power the wireless communication chip 10, and to convert the first power supply voltage and output a second power supply voltage to the second output terminal to provide power supply voltage to the external functional module 300 and / or to be used as a drive signal.

[0152] Based on the above embodiments, the wireless communication module 200 is a WiFi module, the wireless communication chip 10 is a WiFi chip, and the power conversion circuit 20 is a step-down circuit used to step down the 5V voltage connected to the WiFi module and output a 3.3V drive voltage. That is, the WiFi module is connected to the first power supply voltage provided by the main control board, using 5V power supply. Internally, the power conversion circuit 20 converts it to 3.3V and outputs it through the first output terminal to power the WiFi chip. Simultaneously, the functional I / O pins of the WiFi module are connected to the second output terminal of the power conversion circuit 20, and the output voltage is 3.3V. The second power supply voltage output by the power conversion circuit 20 through the second output terminal can be used as a drive signal, for example, by separately pulling out a 3.3V power interface (I / O pin) for use by the MOSFET in the level conversion circuit on the display board. At the same time, the second power supply voltage output by the power conversion circuit 20 through the second output terminal can also provide power to other functional modules 300. For example, other power interfaces of the WiFi module can also power peripheral loads that require a 3.3V drive voltage. Thus, the 3.3V drive voltage output from the power conversion circuit 20 to the functional I / O pins of the WiFi module can be divided into three parts: driving the WiFi chip, driving peripheral loads as general I / O, and serving as the input voltage for the level conversion circuit to drive the MOSFET. This enables some 5V peripheral loads to be compatible with the 3.3V drive voltage.

[0153] In practical applications, a step-down DC-DC converter chip can be used as the power conversion circuit 20 to ensure efficient conversion from 5V to 3.3V, reduce energy loss and heat generation, and meet the voltage requirements of peripheral loads such as WiFi chips that require a 3.3V operating voltage.

[0154] The present invention also proposes an air conditioner, which includes the functional board described in any of the above claims, or includes the wireless communication module 200 described in the above claims.

[0155] It is worth noting that since the air conditioner of the present invention includes the above-mentioned functional board or wireless communication module 200, the embodiments of the air conditioner of the present invention include all the technical solutions of all embodiments of the above-mentioned functional board and / or wireless communication module 200, and the technical effects achieved are exactly the same, which will not be repeated here.

[0156] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A functional board, characterized in that, The functional board includes: The first power input terminal is used to connect the first power supply voltage; A wireless communication module includes a wireless communication chip, a power conversion circuit, and multiple first power output terminals. The input terminal of the power conversion circuit is connected to a first power input terminal, and the output terminal of the power conversion circuit is connected to multiple first power output terminals. The power supply terminal of the wireless communication chip is connected to any one of the first power output terminals. The power conversion circuit is used to convert the first power supply voltage to a second power supply voltage. The functional module has a first signal terminal and a second signal terminal. The first signal terminal is connected to the first power input terminal, and the second signal terminal is electrically connected to the wireless communication chip.

2. The functional board as described in claim 1, characterized in that, The wireless communication chip includes multiple second power output terminals, and there are multiple functional modules. The first signal terminals of the multiple functional modules are respectively connected to the first power input terminal, and the second signal terminals of the multiple functional modules are connected to at least one second power output terminal.

3. The functional board as described in claim 2, characterized in that, The multiple functional modules include a sound prompt circuit, wherein the first signal terminal of the sound prompt circuit is the main power supply terminal, and the second signal terminal of the sound prompt circuit is the driving terminal; The power conversion circuit is used to output the second power supply voltage to the driving terminal to drive the sound prompt circuit to work.

4. The functional board as described in claim 2, characterized in that, The multiple functional modules include an ambient light circuit, wherein the first signal terminal of the ambient light circuit is the main power supply terminal, and the second signal terminal of the ambient light circuit is the driver terminal; The power conversion circuit is used to output the second power supply voltage to the driving terminal to drive the ambient light circuit to work.

5. The functional board as described in claim 1, characterized in that, The power conversion circuit includes: An input filtering circuit, wherein the input terminal of the input filtering circuit is electrically connected to the first power input terminal, is used to filter the first power supply voltage and output it. A DC-DC converter circuit, wherein the input terminal of the DC-DC converter circuit is electrically connected to the output terminal of the input filter circuit, and is used to convert the voltage output by the input filter circuit into a voltage and then output it. An energy storage circuit, wherein the input terminal of the energy storage circuit is electrically connected to the output terminal of the DC-DC converter circuit, is used to store and output the voltage output by the DC-DC converter circuit; An output filter circuit is provided, wherein the input terminal of the output filter circuit is electrically connected to the output terminal of the energy storage circuit, and the output terminal of the output filter circuit is the output terminal of the power conversion circuit, which is used to filter the voltage output by the energy storage circuit and output a second power supply voltage.

6. The functional board as described in claim 5, characterized in that, The input filtering circuit includes: An input filter capacitor, wherein the first terminal of the input filter capacitor, the first power input terminal, and the input terminal of the DC-DC converter circuit are interconnected, and the second terminal of the input filter capacitor is grounded; and / or, the output filter circuit includes: An output filter capacitor is provided, with its first terminal electrically connected to the output terminal of the energy storage circuit and its second terminal grounded.

7. The functional board as described in claim 1, characterized in that, The wireless communication module also includes: A touch detection module, wherein the power supply terminal of the touch detection module is electrically connected to any one of the first power output terminals, and the touch detection module is used to output a corresponding touch detection signal when triggered by the user; The main control module, wherein the power supply terminal of the main control module is electrically connected to any one of the first power output terminals; The main control module is used to receive external signals, process the signals, and output corresponding display control signals.

8. The functional board as described in claim 1, characterized in that, The sum of the peak currents of multiple functional modules shall not exceed the current output by the power conversion circuit.

9. The functional board as described in claim 1, characterized in that, The plurality of functional modules further include one or more combinations of an infrared module, a radar module, and a programming module. A drive voltage conversion circuit is provided on the functional board, and the input terminal of the drive voltage conversion circuit is electrically connected to the first power output terminal. The drive voltage conversion circuit is used to output a drive voltage to the infrared module, the radar module, and the programming module. The driving voltage conversion circuit is used to convert the second power supply voltage output from the first power supply output terminal into a third power supply voltage.

10. The functional board as described in claim 9, characterized in that, The drive voltage conversion circuit includes: The signal input terminal and the signal output terminal are both electrically connected to the wireless communication module. A first pull-up circuit and a second pull-up circuit, wherein the first terminal of the first pull-up circuit, the first terminal of the second pull-up circuit, and the first power input terminal are interconnected; A first switching circuit, wherein a first terminal of the first switching circuit is connected to the signal output terminal, and a second terminal of the first switching circuit is connected to the second terminal of the first pull-up circuit; A second switching circuit, wherein the first terminal of the second switching circuit is connected to the signal input terminal, and the second terminal of the second switching circuit is connected to the second terminal of the second pull-up circuit; The signal output terminal is connected to the second terminal of the first switching circuit, and the signal input terminal is connected to the second terminal of the second switching circuit.

11. The functional board as described in claim 1, characterized in that, The functional module does not contain a level conversion circuit.

12. The functional board as described in claim 1, characterized in that, The functional board is also equipped with: A filtering circuit, one end of which is electrically connected to the wireless communication module, and the other end of which is used to connect to a functional module; The filtering circuit includes an electrolytic capacitor, which is disposed on the functional board close to the wireless communication module.

13. The functional board as described in claim 1, characterized in that, The function board is equipped with a display module interface for connecting a display module; Motor interface, used to connect the motor; The wireless communication module is electrically connected to the display module via the first circuit wiring and the display module interface; The wireless communication module is electrically connected to the motor via the second circuit wiring and the motor interface.

14. The functional board as described in claim 13, characterized in that, The functional board is also equipped with: An isolation zone is provided corresponding to the first circuit wiring and the second circuit wiring, and the isolation zone is spaced between the first circuit wiring and the second circuit wiring.

15. The functional board as described in claim 1, characterized in that, The surface of the functional board corresponding to the wireless communication module is also provided with a no-wiring area.

16. The functional board as described in claim 1, characterized in that, The functional board is a display board.

17. A wireless communication module, characterized in that, The wireless communication module is the wireless communication module according to any one of claims 1 to 16; the wireless communication module includes: Wireless communication chip; A power conversion circuit includes an input terminal, a first output terminal, and a second output terminal. The input terminal of the power conversion circuit is electrically connected to the first power input terminal, the first output terminal is electrically connected to the wireless communication chip, and the second output terminal is used to connect to an external functional module. The power conversion circuit is used to convert the first power supply voltage and output a second power supply voltage to the first output terminal to power the wireless communication chip, and to convert the first power supply voltage and output a second power supply voltage to the second output terminal to provide power supply voltage for external functional modules and / or to be used as a drive signal.

18. An air conditioner, characterized in that, The air conditioner includes a function board as described in any one of claims 1 to 16, or includes a wireless communication module as described in claim 17.

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