Display panel of air conditioner and air conditioner
By using the WiFi module as the main control chip of the air conditioner display board, independently processing WiFi RF signals and peripheral functions, the problem of increasing MCU resource demand and mutual influence of WiFi RF performance and peripheral load functions in the existing technology is solved, and a high-integration and low-cost electronic control solution is achieved.
Patent Information
- Application Number
- CN202422080304.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-26
AI Technical Summary
When the existing air conditioner display panels expand peripheral load, the MCU resource demand increases, resulting in an increase in costs. WiFi RF performance and peripheral load functions affect each other, making it difficult to take into account both.
The WiFi module is used as the main control chip of the display board, responsible for WiFi communication and peripheral load control, and adopts a dual-core architecture to independently process WiFi radio frequency signals and peripheral functions, optimize circuit layout, shorten trace distance, and improve integration.
It improves the integration level of the main control chip, saves MCU chip space, meets the anti-interference needs of WiFi RF antennas, optimizes the wiring space, reduces costs, and improves the quality of electronic control.
Smart Images
Figure CN222964109U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electronic circuits, and particularly relates to a display board of an air conditioner and an air conditioner. Background Art
[0002] Some air conditioners are equipped with a touch and display panel, and the display board of this panel is called a display board, which usually integrates display functions and touch functions, etc. The display board is separately arranged from the main control board of the air conditioner, and some peripheral loads of the air conditioner are also migrated to the display board, including peripheral loads such as stepping motors, infrared remote control modules, and radar modules, which are all connected to the display board for control.
[0003] However, with the increase in the number of peripheral loads to be expanded, the demand for the MCU resources of the display board is also getting higher and higher, including more IO port numbers and memory sizes. Higher-specification chips also mean higher costs. Therefore, how to achieve extreme cost reduction on the premise of meeting resources is an important problem in solving the next-generation electronic control solution. Utility Model Content
[0004] The embodiments of the present application provide a display board of an air conditioner and an air conditioner, which can optimize the device layout and improve the integration degree of the display board.
[0005] In a first aspect, the embodiments of the present application provide a display board of an air conditioner. The display board includes a WiFi module, a peripheral load circuit, and a wiring socket. The WiFi module is coupled to the peripheral load circuit as the main control chip of the display board, and the peripheral load circuit is coupled to peripheral hardware through the wiring socket;
[0006] Wherein, the WiFi module and the wiring socket are respectively arranged close to the two side edges of the display board, and the peripheral load circuit is arranged between the WiFi module and the wiring socket.
[0007] In some embodiments, the display board further includes:
[0008] A first area, where the WiFi module is arranged in the first area;
[0009] A second area, where the peripheral load circuit is arranged in the second area;
[0010] A third area, where the wiring socket is arranged in the third area;
[0011] Wherein, the first area, the second area, and the third area are arranged in sequence along the length direction of the display board, and the first area and the third area are respectively close to the two side edges of the display board.
[0012] In some embodiments, the peripheral load circuit includes a touch key circuit and a display communication circuit, and the touch key circuit is arranged adjacent to the WiFi module on the display board.
[0013] In some embodiments, the peripheral load circuit further includes an ambient light circuit, the wiring socket includes an ambient light socket, and the pins of the WiFi module leading out to the ambient light circuit and the pins leading out to the touch key circuit are located on the first side of the WiFi module.
[0014] In some embodiments, the peripheral load circuit further includes a main control power supply circuit and a main control communication circuit, the wiring socket includes a main control board socket for connecting to the main control board of the air conditioner, both the main control power supply circuit and the main control communication circuit are connected to the main control board socket, the main control power supply circuit is used to convert the power supply voltage from the main control board into the power supply voltage of the WiFi module, and the main control communication circuit is used to establish a communication connection between the WiFi module and the main control board.
[0015] In some embodiments, the peripheral load circuit further includes a motor drive circuit, the wiring socket includes at least one stepper motor socket for connecting to a stepper motor, the stepper motor socket is coupled to the pins on the second side of the WiFi module through the motor drive circuit, and the motor drive circuit also takes power from the input end of the main control power supply circuit.
[0016] In some embodiments, the motor drive circuit is not connected to the ground terminal of the WiFi module.
[0017] In some embodiments, the number of the stepper motor sockets is multiple, and the stepper motor sockets are connected to the input end of the main control power supply circuit in a series-wiring manner, so that the stepper motors connected to the stepper motor sockets are in series, and filter capacitors are arranged on the series wiring of at least two of the stepper motor sockets.
[0018] In some embodiments, the peripheral load circuit further includes at least one of a radar circuit, a programming and debugging circuit, a display communication circuit, a buzzer, and an infrared receiving circuit. The radar circuit and the programming and debugging circuit are coupled to the serial port pins of the WiFi module, the display communication circuit is coupled to the I2C pins of the WiFi module, the buzzer is coupled to the PWM output pins of the WiFi module, the infrared receiving circuit is coupled to the infrared receiving pins of the WiFi module, and the serial port pins, the I2C pins, the PWM output pins, and the infrared receiving pins are all located on the third side of the WiFi module.
[0019] In some embodiments, at least one of the programming and debugging circuit, the buzzer, and the infrared receiving circuit is arranged close to the third side of the WiFi module.
[0020] In a second aspect, an embodiment of the present application further provides an air conditioner, including the display board described in the first aspect.
[0021] The display board and the air conditioner of the embodiment of the present application have at least the following beneficial effects: The display board of the embodiment of the present application uses the WiFi module as the main control chip, which is responsible for the WiFi communication of the air conditioner and at the same time controls the peripheral loads connected to the display board, is compatible with various functions of the display board, improves the integration degree of the main control chip, saves the space position of the original MCU chip. On the other hand, setting the WiFi module on one side of the display board can meet the anti-interference requirements of the WiFi radio frequency antenna, and setting the wiring socket on the other side of the display board is convenient for assembly wiring and improves the assembly efficiency. Setting the area of the peripheral load circuit between the areas of the WiFi module and the wiring socket optimizes the wiring method of the WiFi module, that is, the control signal first passes through the peripheral load circuit and then reaches the wiring socket, which can shorten the wiring distance, optimize the wiring space, and avoid too long wiring, thereby improving the integration degree of the display board.
[0022] Other features and advantages of the present application will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained by the structures specifically pointed out in the specification and the drawings. Description of the Drawings
[0023] Figure 1 is a schematic diagram of module distribution from the back view of the display board provided by the embodiment of the present application;
[0024] Figure 2 is another schematic diagram of module distribution from the back view of the display board provided by the embodiment of the present application;
[0025] Figure 3 is a schematic diagram of the connection relationship between modules from the back view of the display board provided by the embodiment of the present application;
[0026] Figure 4 is a schematic diagram of the connection method of the stepping motor provided by the embodiment of the present application;
[0027] Figure 5 is a schematic diagram of the pin lead-out of the WiFi module provided by the embodiment of the present application. Detailed Embodiments
[0028] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Additionally, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean that they are the necessary sequences, unless it is stated that a certain sequence must be followed.
[0029] In the description of the present application, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number, and understandings such as "above", "below", "within", etc. include the corresponding number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.
[0030] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).
[0031] With the accelerating integration and powerful empowerment of new technologies, the air-conditioning electronic control technology is constantly developing, further promoting the technological upgrading of integration and miniaturization, and achieving cost leadership, efficiency improvement and quality breakthrough. Among them, due to different application scenarios, there are some differences in requirements between cabinet air conditioners and traditional wall-mounted air conditioners. For example, a cabinet air conditioner provides a panel with a display function + touch function externally, and this panel is controlled by a display board, which is connected to the main control board of the cabinet air conditioner through a cable. In this way, the main control board of the cabinet air conditioner can be made into a platform-standardized board component to reduce production costs; and the display board, as a differentiated board component, in addition to integrating the above-mentioned display function + touch function, also integrates some peripheral loads onto the display board, such as peripheral loads like stepper motors, infrared remote control modules, radar modules, etc. This makes the number of circuit modules on the display board increase, and the resource requirements for the control chip on the display board are also getting higher and higher, including the need for more IO port numbers and memory sizes. If a higher-specification control chip is replaced, it means higher costs.
[0032] At present, some display boards integrate independent WiFi chips. The WiFi chips are connected to the control chips of the display boards through the communication lines of the display boards, and the WiFi chips also occupy a part of the area of the display boards. In order to improve the integration degree and meet the requirements of function integration and cost reduction, further integrating the WIFI chips and the control chips of the display boards is one of the development trends. Therefore, how to solve the problem that the WIFI radio frequency performance and the peripheral load functions of the original control chips affect each other is an important research topic direction.
[0033] Based on this, the embodiments of the present application provide a display board of an air conditioner and an air conditioner. The display board uses a WiFi module as the main control chip, which is responsible for the WiFi communication of the air conditioner and at the same time responsible for controlling the peripheral loads connected to the display board, compatible with various functions of the display board, improving the integration degree of the main control chip, saving the space position of the original MCU chip. On the other hand, setting the WiFi module on one side edge of the display board can meet the requirements of anti-interference of the WiFi radio frequency antenna, and setting the wiring socket on the other side edge of the display board is convenient for assembly wiring, improving the assembly efficiency. The area of the peripheral load circuit is set between the areas of the WiFi module and the wiring socket, optimizing the wiring mode of the WiFi module, that is, the control signal first passes through the peripheral load circuit and then reaches the wiring socket, which can shorten the wiring distance, optimize the wiring space, and avoid too long wiring, thereby improving the integration degree of the display board.
[0034] The following will describe the display board of the air conditioner and the air conditioner with reference to the drawings:
[0035] Refer to Figure 1 and Figure 2 As shown in the module layout diagram of the display board, the display board of the embodiment of the present application is installed in the air conditioner. The display board includes a WiFi module with multiple physical cores, a peripheral load circuit, and a wiring socket. The WiFi module is used as the main control chip of the display board and is coupled to the peripheral load circuit to run the WiFi function program and the main function program corresponding to the peripheral load through different physical cores. The peripheral load circuit is coupled to the peripheral hardware through the wiring socket; wherein, the WiFi module and the wiring socket are respectively arranged close to the two side edges of the display board, and the peripheral load circuit is arranged between the WiFi module and the wiring socket.
[0036] By the above setting method, the setting areas of the WiFi module and the wiring socket are separated, and the peripheral load circuit is set between the areas where they are located. Therefore, the overall circuit wiring of the display board is from the WiFi module to the peripheral load circuit, and then from the peripheral load circuit to the wiring socket. Such a wiring method can make the wiring distance the shortest, the component layout is concentrated and more reasonable, and the integration degree of the display board can be improved.
[0037] Among them, the display board further includes:
[0038] The first region where the WiFi module is arranged;
[0039] The second region where the peripheral load circuit is arranged;
[0040] The third region where the wiring socket is arranged;
[0041] Among them, the first region, the second region, and the third region are arranged in sequence along the length direction of the display board, and the first region and the third region are respectively close to the two side edges of the display board.
[0042] Figure 1 This is the rear view of the display board. The display board is overall rectangular. The left - right direction is the length direction of the display board, and the up - down direction is the width direction of the display board (the edges of the display board can also be irregular, but overall it is rectangular to have two directions of length and width). From left to right are the third region, the second region, and the first region. The wiring socket is arranged in the third region, and the wiring socket is used to connect the peripheral load to the display board. The peripheral load circuit is arranged in the second region, which is used to drive the peripheral load, or perform voltage conversion, or transmit signals, etc. The WiFi module is arranged in the first region. The WiFi module is coupled to the peripheral load circuit through pins and controls the operation of each peripheral load as the main control chip of the display board.
[0043] In this embodiment, the WiFi module needs to solve the problem that the WIFI radio frequency performance and the peripheral load function affect each other. Therefore, the WiFi module has multiple physical cores, at least one of which is responsible for running the WiFi function program, and at least one other physical core is loaded with the main function program corresponding to the peripheral load function. That is, the WiFi module is at least a dual-core architecture, and this dual-core architecture has two independent physical cores, so that the WiFi function program and the main function program run on different physical cores, and thus the running processes of the two do not affect each other, solving the problem that the WiFi module of the traditional display board integrated into the control chip needs to take into account the mutual influence between the WiFi radio frequency performance and the peripheral load function. On the basis of the independent operation of the two cores, if data interaction is required between the WiFi function program and the main function program, the two physical cores communicate with each other through the Inter-Processor Communication (IPC) method. Among them, the main function program refers to the program that controls each peripheral load. For example, the main function program can send a PMW signal to the peripheral load circuit to drive the buzzer, one of the peripheral loads, to work. Another example is that the main function program can receive the touch signal of the display module, one of the peripheral loads, and send an instruction to the main control board of the air conditioner to execute the action corresponding to the touch signal after identifying the touch signal. Another example is that the main function program sends a display signal to the display module to make the display module display information, and so on. In short, in the embodiment of the present application, the main function program is different from the WiFi function program, is responsible for the peripheral load drive control, and executes the functions equivalent to the main control chip in the traditional display board.
[0044] On the other hand, as shown in Figure 3 the layout of the first area, the second area and the third area takes into account the WiFi radio frequency performance, the convenience of wiring and the assembly difficulty. The first area is located at the right edge of the display board, so that the WiFi module is arranged at the edge of the display board, meeting the anti-interference requirements of the WiFi radio frequency antenna. The second area is the intermediate area between the WiFi module and the wiring socket, so that the wiring between the WiFi module and the peripheral load circuit is short, and the wiring between the peripheral load circuit and the wiring socket is also short, making the wiring of the display board more reasonable and convenient. The third area is located at the left edge of the display board, which is convenient for workers to insert the plug into the wiring socket during the assembly of the display board, reducing the assembly difficulty.
[0045] It can be understood that although the above Figure 1The first area, the second area, and the third area are shown with distinct and regular dividing lines. However, in actual applications, the layout of components on the display board may not be regular, and the boundary lines of the areas may be curved, bent, etc. Therefore, the boundary lines of the actual first area, second area, and third area are variable, but they all generally follow the arrangement from left to right, rather than strictly requiring to arrange the components on the display board in accordance with the Figure 1 way of dividing the areas.
[0046] In some embodiments, the peripheral load circuit includes a touch button circuit and a display communication circuit. The WiFi module includes a first physical core and a second physical core, and data interaction is performed between the first physical core and the second physical core through inter-core communication; the first physical core is configured to run the WiFi function program, and the second physical core is configured to run the display function program corresponding to the display communication circuit and receive the touch control signals of the touch button circuit.
[0047] The WiFi module of this embodiment has a first physical core and a second physical core. The first physical core and the second physical core can be two dies (chips) from a single wafer. Furthermore, the first physical core and the second physical core can exchange data at a very high access speed through inter-core communication and accessing shared memory. Among them, the air conditioner of this embodiment provides a display function and a touch control function. For example, it is provided with a display screen and physical buttons, or a display module is provided to implement the functions of both display and touch control. In terms of the display board, the touch button circuit is connected to the physical buttons and / or the touch panel of the air conditioner. When the physical buttons are triggered or the touch panel is triggered, the second physical core of the WiFi module processes the touch control signals of the touch button circuit. The display screen and / or the display module with a display function can receive the display signals sent by the second physical core of the WiFi module, and the WiFi function program runs independently on the first physical core of the WiFi module and can be quickly interrupted when data code needs to be sent and received. The quick interruption can be controlled within the ms level. Therefore, even if the WiFi function program is frequently restarted, it will not affect the normal operation of the main function program.
[0048] In some embodiments, the touch button circuit and the WiFi module are arranged adjacent to each other on the display board.
[0049] The touch button circuit needs to transmit touch control signals to the WiFi module and needs to ensure that the touch control signals are not greatly interfered. Therefore, on the circuit layout of the display board, the touch button circuit is set close to the WiFi module. This can make the shortest trace between the touch button circuit and the WiFi module, and ensure that the parasitic capacitances of each signal transmission channel are basically the same, which can meet the touch threshold requirements and avoid the situation of misjudgment due to large differences in the signal-to-noise ratios of different signal transmission channels. Specifically, refer to Figure 2As shown, the touch key circuit is arranged on the left side of the WiFi module, and there is no other circuit module between the two, enabling the pins of the WiFi module to directly route to the touch key circuit to achieve the shortest routing.
[0050] Referring to Figure 2 and Figure 5 As shown, in some embodiments, the peripheral load circuit further includes an ambient light circuit, the wiring socket includes an ambient light socket, and the pins of the WiFi module leading to the ambient light circuit and the pins leading to the touch key circuit are located on the first side of the WiFi module.
[0051] The ambient light circuit drives the ambient light of the air conditioner to work by receiving the control signal of the main function program running on the second physical core of the WiFi module. The ambient light circuit is also connected to the terminals of the ambient light socket in the wiring socket. When the display board is assembled, the plug of the ambient light is inserted and fixed in the ambient light socket to connect the ambient light and the WiFi module. In this embodiment, not all the pins on the first side of the WiFi module occupied by the touch key circuit are used up, and there are remaining pins on the first side. Then, the remaining pins are selected to be connected to the ambient light circuit, so that both the ambient light circuit and the touch key circuit lead out on the same side of the WiFi module, making full use of the pins of the WiFi module. From the layout position, the ambient light circuit is located on the left side of the touch key circuit, and the ambient light socket is located on the left side of the ambient light circuit, which can shorten the routing between the ambient light socket and the WiFi module.
[0052] In some embodiments, the peripheral load circuit further includes a main control power supply circuit and a main control communication circuit, the wiring socket includes a main control board socket for connecting the main control board of the air conditioner, both the main control power supply circuit and the main control communication circuit are connected to the main control board socket, the main control power supply circuit is used to convert the power supply voltage from the main control board into the power supply voltage of the WiFi module, and the main control communication circuit is used to establish a communication connection between the WiFi module and the main control board.
[0053] The WiFi module draws power from the main control board. The main control power supply circuit converts the power supply voltage of the main control board into the power supply voltage of the WiFi module. For example, the main control board is connected to the main control board socket to provide a 12V voltage, and the main control power supply circuit converts the 12V voltage into a 5V voltage (for example, through a DCDC circuit for voltage conversion) to supply power to the WiFi module. The WiFi module also communicates with the main control board through the main control communication circuit. When the communication method is wired communication, in addition to the power supply pins, the main control board socket also provides communication pins, and it can be connected to the main control board through the communication pins of the main control board socket. When the communication method is wireless communication, the display board can be connected to the WiFi chip of the main control board through the WiFi function program of the first physical core of the WiFi module, or the display board can be additionally provided with a cable to connect to the communication port of the main control board, and so on. In terms of the layout position, the main control board socket is arranged at the lower left corner close to the display board, the DCDC circuit for level conversion is arranged below the second area, and the circuits related to the main control communication are located in the middle of the second area. In this way, the DCDC circuit can be isolated from the touch key circuit, reducing the power supply ripple of the DCDC circuit from interfering with the touch key circuit and ensuring that the touch key circuit has a high signal-to-noise ratio.
[0054] Referring to Figure 2 and Figure 5 As shown, in some embodiments, the peripheral load circuit further includes a motor drive circuit. The wiring socket includes at least one stepper motor socket for connecting a stepper motor. The stepper motor socket is coupled to the pins on the second side of the WiFi module through the motor drive circuit. The motor drive circuit is also connected to the input end of the main control power supply circuit to draw power.
[0055] The stepper motor is connected to the motor drive circuit through the stepper motor socket. The WiFi module sends a drive signal to the motor drive circuit to make the motor drive circuit drive the stepper motor to act. Among them, the outgoing line of the motor drive circuit is connected to the pins on the second side of the WiFi module. When there are enough pins on the second side of the WiFi module, multiple stepper motors can be connected, so that the pins of the circuits related to the stepper motor can be concentrated on the second side. If the stepper motor is driven by a 12V voltage, the motor drive circuit can draw 12V voltage from the main control power supply circuit connected to the main control board. Due to the nature of the power supply voltage for level conversion, the power supply taking point of the motor drive circuit is located at the input end of the main control power supply circuit, or it can also be located at the 12V pin of the main control board socket.
[0056] In some embodiments, the number of stepper motor sockets is multiple. The stepper motor sockets are connected to the input end of the main control power supply circuit in series through the wiring, so that the stepper motors connected to the stepper motor sockets are in series. Filter capacitors are provided on the series wiring of at least two of the stepper motor sockets.
[0057] Figure 4 There are a total of four stepper motors as shown. Stepper motor 1, stepper motor 2, stepper motor 3, and stepper motor 4 are all connected to 12V and GND. Among them, a filter capacitor is set in the circuit between stepper motor 3 and stepper motor 4 for rectification and filtering, which is beneficial to the improvement of EMC performance. Correspondingly, four stepper motor sockets are set at the wiring socket, and each stepper motor socket is respectively connected to a stepper motor. From the perspective of the layout position, the motor drive circuit is set near the wiring socket and is close to the main control power supply circuit for convenient power taking of 12V. In order to avoid the start and stop of the stepper motor from interfering with the stability of the power plane, the motor drive circuit is independently separated from the grounding end of the WiFi module, that is, they are respectively connected to different grounding ends, so as to reduce the interference of the stepper motor on the WiFi module.
[0058] Refer to Figure 2 and Figure 5 As shown, in some embodiments, the peripheral load circuit further includes at least one of a radar circuit, a programming and debugging circuit, a display and communication circuit, a buzzer, and an infrared receiving circuit. The radar circuit and the programming and debugging circuit are coupled to the serial port pins of the WiFi module. The display and communication circuit is coupled to the I2C pins of the WiFi module. The buzzer is coupled to the PWM output pins of the WiFi module. The infrared receiving circuit is coupled to the infrared receiving pins of the WiFi module. The serial port pins, the I2C pins, the PWM output pins, and the infrared receiving pins are all located on the third side of the WiFi module.
[0059] In addition to the above peripheral loads, other peripheral loads can also be integrated onto the display board. The above peripheral loads mainly occupy four types of IO ports. Among them, the radar circuit and the programming and debugging circuit occupy the serial port pins of the WiFi module (the main control communication circuit that communicates with the main control board also occupies the serial port pins). The display and communication circuit occupies the I2C pins of the WiFi module. The buzzer occupies the PWM output pins of the WiFi module. The infrared receiving circuit occupies the infrared receiving pins of the WiFi module. These pins are all concentrated on the third side of the WiFi module. From the perspective of the layout position, the radar circuit is set near the wiring socket and is connected to the radar interface in the wiring socket. The buzzer, the programming and debugging circuit, and the infrared receiving circuit are set below the WiFi module, that is, set at a position close to the third side. Among them, the infrared receiving circuit can be connected to the button small board of the touch compatibility circuit to receive touch signals through infrared interruption. The display and communication circuit is set below the second area and is set close to the edge of the display board.
[0060] In summary, the circuits and components on the display board are arranged around the WiFi module as the main control chip of the display board. Through the above layout method of the display board, the IO pins of the WiFi module can be effectively utilized, and the pins are connected according to the functions of the peripheral load circuits. In particular, considering that the pins of the touch key circuit are all placed on the same side of the WiFi module, it is beneficial to reduce the wiring length and interference, reduce the parasitic capacitance and the background noise of the touch signal. In addition, by optimizing the layout space on the display board, the miniaturization and integration of the display board solution are realized, which can effectively reduce the cost of the display board and improve the electrical control quality.
[0061] The embodiment of the present application also provides an air conditioner, including the display board of any one of the above embodiments.
[0062] The display board of the present application will be described in detail below through a specific example.
[0063] The display board is set in a floor-standing cabinet air conditioner (or set in a wall-mounted air conditioner indoor unit). The display board integrates a variety of peripheral loads, and uses a WiFi module as the main control chip of the display board to run the WiFi function program and the main function program. The WiFi module adopts a dual-core architecture, including a first physical core and a second physical core. The first physical core runs the WiFi function program, and the second physical core runs the main function program, responsible for controlling the operation of the peripheral loads, such as including the display function and the touch function. That is to say, the WiFi module integrates the three functions of WiFi, display and touch. Therefore, the display board in this example is a three-in-one display board. Compared with the traditional display board that combines display and touch, the WiFi module in this example is used as the main control module, and its pin definition is different from that of the control chip of the traditional display board. Therefore, the circuit layout of the display board is redesigned. Specifically:
[0064] Refer to Figure 1 From the back view of the shown display board, the display board is overall rectangular. The left-right direction is the length direction of the display board, and the up-down direction is the width direction of the display board. The WiFi module is set at Figure 1 the upper right corner position to meet the radio frequency antenna anti-interference requirements. The wiring socket is set at Figure 1 the left position to improve the assembly efficiency. An external peripheral load circuit is set between the WiFi module and the wiring socket. The external peripheral load circuit includes a touch key circuit, a display communication circuit, an atmosphere light circuit, a main control power supply circuit, a main control communication circuit, a motor drive circuit, a radar circuit, a programming and debugging circuit, a display communication circuit, a buzzer and an infrared receiving circuit. The wiring socket includes an atmosphere light socket, a stepping motor socket, a radar interface, and a main control board socket. The pins of the WiFi module are routed from the right side through the external peripheral load circuit to the wiring socket on the left side, which can achieve a shorter wiring distance.
[0065] Among them, pins are led out from the first side, the second side, and the third side of the WiFi module. The pins on the first side are coupled to the touch button circuit and the atmosphere light circuit. The touch button circuit is arranged close to the first side of the WiFi module to ensure that the pins of the WiFi module connected to the touch button circuit are closely connected pins. In this way, other signal interferences can be reduced, and it is ensured that the touch button circuit is connected to the WiFi module with the shortest trace and the parasitic capacitance of each touch signal channel remains consistent. Furthermore, the touch threshold requirement of the touch button circuit can be met, and the problem of false touch caused by a large difference in the signal-to-noise ratio of different touch signal channels can be avoided.
[0066] The motor drive circuit also includes a part of the negative ion drive circuit. A negative ion socket is provided at the wiring socket, which can be connected to a negative ion generating device. The pins on the second side of the WiFi module to which the motor drive circuit is connected control the operation of the stepper motor by outputting high and low levels. Among them, the motor drive circuit is arranged close to the wiring socket, and the wiring distance is short, which is convenient for routing the power line and the ground line. The air conditioner in this example is provided with four series-connected stepper motors, which draw power from the terminals at the main control board socket to ensure the shortest closed-loop path. And a 220um filter capacitor is provided between stepper motor 3 and stepper motor 4 for rectification and filtering, which is beneficial to the improvement of EMC performance.
[0067] In order to reduce the interference of the stepper motor start and stop on the stability of the power plane, the ground wire of the motor drive circuit is separated from the ground wire of the WiFi module.
[0068] The pins corresponding to the serial communication, I2C communication, PWM, and infrared reception of the WiFi module are all on the third side, including three groups of serial pins, which are respectively coupled to the programming and debugging circuit, the radar circuit, and the main control board socket. The main control board socket provides 12V power supply, and the main control power supply circuit converts the 12V DC level into 5V to supply power to the WiFi module. The I2C pins of the WiFi module are connected to the display screen or the display module. The PWM output pins of the WiFi module are connected to the buzzer. The infrared reception pins of the WiFi module are connected to the button small board (touch-compatible circuit).
[0069] Compared with the traditional solution of integrating a control chip and a WiFi chip on the display board and occupying a group of serial port resources through serial communication between the control chip and the WiFi chip, in this example, the WiFi chip is directly used as the main control chip, and the functions of processing the WiFi radio frequency signal and the original control chip's main function are independently processed by two physical cores. The data transmission between the WIFI core and the MCU core is realized through inter-core communication, improving the quality and efficiency. At the same time, in this example, the layout of the display board is also optimized. According to the pin situation of the WiFi module, the circuit is arranged, and the pins of the same type or similar functions are placed on the same side of the WiFi module, which is beneficial to shortening the wiring and reducing interference.
[0070] It should be understood that in this application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects and indicates that there can be three relationships. For example, "A and / or B" can represent: only A exists, only B exists, and both A and B exist simultaneously. Here, A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item) of the following" or its similar expressions refer to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.
[0071] In several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling, direct coupling, or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of apparatuses or units can be in electrical, mechanical, or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0072] It should also be understood that the various embodiments provided in the embodiments of this application can be combined arbitrarily to achieve different technical effects.
[0073] The above has specifically described the preferred embodiments of this application, but this application is not limited to the above-mentioned embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of this application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A display panel of an air conditioner, characterized in that: The display panel includes a WiFi module with multiple physical cores, a peripheral load circuit and a wiring socket, wherein the WiFi module is coupled to the peripheral load circuit as a main control chip of the display panel, and the peripheral load circuit is coupled to the peripheral hardware through the wiring socket; The WiFi module and the wiring socket are respectively arranged close to the two side edges of the display panel, and the external load circuit is arranged between the WiFi module and the wiring socket.
2. The display panel according to claim 1, characterized in that: The display panel also includes: A first area, wherein the WiFi module is arranged in the first area; a second area, wherein the peripheral load circuit is arranged in the second area; A third area, wherein the wiring socket is arranged in the third area; The first area, the second area and the third area are arranged in sequence along the length direction of the display panel, and the first area and the third area are respectively close to two side edges of the display panel.
3. The display panel according to claim 1, characterized in that The peripheral load circuit includes a touch button circuit and a display communication circuit, and the touch button circuit is arranged adjacent to the WiFi module on the display panel.
4. The display panel according to claim 3, characterized in that The peripheral load circuit also includes an atmosphere light circuit, the wiring socket includes an atmosphere light socket, and the pins of the WiFi module connected to the atmosphere light circuit and the pins connected to the touch button circuit are located on the first side of the WiFi module.
5. The display panel according to claim 1, characterized in that The peripheral load circuit also includes a main control power supply circuit and a main control communication circuit. The wiring socket includes a main control board socket for connecting to the main control board of the air conditioner. The main control power supply circuit and the main control communication circuit are both connected to the main control board socket. The main control power supply circuit is used to convert the power supply voltage from the main control board into the power supply voltage of the WiFi module. The main control communication circuit is used to establish a communication connection between the WiFi module and the main control board.
6. The display panel according to claim 5, characterized in that The peripheral load circuit also includes a motor drive circuit, and the wiring socket includes at least one stepper motor socket for connecting a stepper motor. The stepper motor socket is coupled to the pin on the second side of the WiFi module through the motor drive circuit, and the motor drive circuit is also connected to the input end of the main control power supply circuit to obtain power.
7. The display panel according to claim 6, characterized in that The motor driving circuit is not connected to the ground terminal of the WiFi module.
8. The display panel according to claim 6, characterized in that There are multiple stepper motor sockets, and the stepper motor sockets are connected to the input end of the main control power supply circuit through series wiring, so that the stepper motors connected to the stepper motor sockets are connected in series, and filter capacitors are arranged on the series wiring of at least two of the stepper motor sockets.
9. The display panel according to claim 1, characterized in that The peripheral load circuit also includes at least one of a radar circuit, a burning and debugging circuit, a display communication circuit, a buzzer and an infrared receiving circuit. The radar circuit and the burning and debugging circuit are coupled to the serial port pin of the WiFi module, the display communication circuit is coupled to the I2C pin of the WiFi module, the buzzer is coupled to the PWM output pin of the WiFi module, and the infrared receiving circuit is coupled to the infrared receiving pin of the WiFi module. The serial port pin, the I2C pin, the PWM output pin and the infrared receiving pin are all located on the third side of the WiFi module.
10. The display panel according to claim 9, characterized in that At least one of the burning and debugging circuit, the buzzer and the infrared receiving circuit is arranged close to the third side of the WiFi module.
11. An air conditioner, characterized in that: Comprising the display panel according to any one of claims 1 to 10.