A dual-core control system for an indoor air conditioner

Abstract

The utility model discloses a kind of double-core control systems of indoor air conditioner, including main control module and vice control module, wherein, the main control module includes main control chip and at least one access main control chip's basic function unit;The vice control module includes vice control chip, voice instruction acquisition unit and localization voice logic processing unit, wherein, the localization voice logic processing unit is connected with voice instruction acquisition unit and vice control chip respectively;The voice instruction acquisition unit is used to receive external voice operation instruction, and the localization voice logic processing unit is used to identify the content of received voice operation instruction, and content is converted into specified identification code transmission to vice control chip and carries out data processing;The main control chip is connected with vice control chip, and the main control chip is controlled basic function unit according to the identification code after processing of vice control chip.

Description

Technical Field

[0001] This utility model relates to the technical field of air conditioner structure, and in particular to a dual-core control system for an indoor air conditioner. Background Technology

[0002] With the development of smart home technology, users' demands for intelligent air conditioners are increasing. In addition to traditional cooling / heating functions, voice control, remote operation, and operating status display are gradually becoming mainstream requirements. However, traditional air conditioners mostly use a single-chip control system, where all functions (such as basic operation control, voice recognition, and data interaction) are processed by the same main control chip, which has the following drawbacks:

[0003] Single-chip processing of concentrated tasks can easily lead to response delays (especially in real-time processing of voice commands).

[0004] Functional expansion is limited; adding new modules (such as display and wireless communication) requires main control chip resources, affecting the stability of basic functions.

[0005] Voice recognition relies on cloud processing, and it cannot work properly when there is a network delay or disconnection, resulting in a poor user experience.

[0006] Therefore, there is an urgent need for a dual-core control system with clear division of labor, high response efficiency, and support for localized intelligent processing. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a dual-core control system for indoor air conditioners. Through the collaborative division of labor between the main and auxiliary control modules, it achieves an efficient combination of stable control of basic functions and localized intelligent interaction, solving problems such as response delay and limited functional expansion of traditional single-chip systems.

[0008] To achieve the above objectives, this utility model provides a dual-core control system for an indoor air conditioner, comprising a main control module and a secondary control module. The main control module includes a main control chip and at least one basic functional unit connected to the main control chip. The secondary control module includes a secondary control chip, a voice command acquisition unit, and a localized voice logic processing unit. The localized voice logic processing unit is connected to both the voice command acquisition unit and the secondary control chip. The voice command acquisition unit receives incoming voice operation commands, and the localized voice logic processing unit identifies the content of the received voice operation commands and converts the content into a specified identification code, which is then transmitted to the secondary control chip for data processing. The main control chip and the secondary control chip are communicatively connected, and the main control chip controls the basic functional unit according to the identification code processed by the secondary control chip.

[0009] Furthermore, the basic functional unit includes an indoor fan and a swing motor.

[0010] Furthermore, the voice command acquisition unit includes two microphones arranged at intervals.

[0011] Furthermore, the secondary control module also includes a display module that is connected to the secondary control chip and used to display operating information.

[0012] Furthermore, the secondary control module also includes a wireless network module that is connected to the secondary control chip and used for wireless communication.

[0013] Furthermore, the secondary control module also includes an infrared receiving module that is connected to the secondary control chip and used to receive remote control infrared commands.

[0014] The present invention adopts the above-mentioned solution, and its beneficial effects are as follows: 1) The main control module focuses on the stable control of the basic functional units, avoids intelligent interactive tasks from occupying its resources, and improves the reliability of operation; 2) The secondary control module completes the real-time recognition of voice commands through the localized voice logic processing unit, without relying on the cloud, and reduces response delay. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the dual-core control system.

[0016] Figure 2 This is a schematic diagram of the working process of the dual-core control system.

[0017] Among them, 1-main control module, 11-main control chip, 12-basic functional unit, 121-indoor fan, 122-swing motor, 2-secondary control module, 21-secondary control chip, 22-voice command acquisition unit, 23-localized voice logic processing unit, 24-display module, 25-wireless network module, 26-infrared receiving module. Detailed Implementation

[0018] To more fully illustrate this utility model, a detailed description will be provided below in conjunction with the accompanying drawings. The drawings depict preferred embodiments of this utility model. However, it is worth noting that this utility model is not limited to these specific forms and can be implemented in various ways. These embodiments are provided to enable the reader to gain a deeper understanding of this utility model.

[0019] As attached Figure 1-2As shown in this embodiment, a dual-core control system for an air conditioner includes a main control module 1 and a secondary control module 2. The main control module 1 is the basic control core of the air conditioner, specifically including a main control chip 11 and at least one basic functional unit 12 connected to the main control chip 11. The basic functional unit 12 is the core execution module for the operation of the air conditioner, specifically including an indoor fan 121 (for adjusting the air volume) and a swing motor 122 (for controlling the air outlet direction). The main control chip 11 directly controls the operating status of the basic functional unit 12 (such as fan speed, swing angle, and electric auxiliary heating) by receiving instructions from the secondary control module 2. The main control chip 11 only receives the final instructions from the secondary control module 2 and does not participate in any interactive data processing, ensuring high real-time performance and stability of the basic functions.

[0020] Specifically, the main control chip 11 preferably uses a low-power, high-real-time microcontroller (such as ST's STM32F4 series, with a main frequency of 168MHz, supporting the μC / OS-II real-time operating system). Its core task is to "receive and execute instructions," and it only needs to retain the communication interface with the basic functional unit 12 (such as the PWM interface to control the fan speed and the GPIO interface to control the forward and reverse rotation of the swing motor 122). Indoor fan 121: controlled by the PWM interface of the main control chip 11, supporting 0-100% stepless speed regulation (corresponding to "low wind-high wind" mode); Swing motor 122: outputs forward / reverse signals through the GPIO interface of the main control chip 11 to control the swing blade angle (such as 15° step adjustment within the range of 0°-120°).

[0021] In this embodiment, the secondary control module 2 is the core of intelligent interaction, including a secondary control chip 21, a voice command acquisition unit 22, a localized voice logic processing unit 23, a display module 24, a wireless network module 25, and an infrared receiving module 26, used to control functions such as voice recognition, status display, network communication, and infrared communication. Localized processing reduces reliance on the cloud while supporting flexible functional expansion without affecting the operation of the main control module 1. Specifically, the secondary control chip 21 uses a microprocessor with stronger computing power (such as the Renesas RX72M series, 240MHz clock speed, with a built-in floating-point unit) to handle complex tasks such as voice recognition and data communication. It communicates with the main control chip 11 via a UART interface (115200bps baud rate) to ensure low latency in command transmission.

[0022] In this embodiment, the voice command acquisition unit 22 is used to receive the user's voice operation commands. Preferably, it employs two microphones arranged at intervals (e.g., symmetrically arranged left and right, microphones MIC1 and MIC2, spaced 10cm apart on both sides of the air conditioner panel). A dual-microphone array enhances voice pickup and reduces environmental noise interference. Specifically, the dual-microphone array can achieve the following functions through a beamforming algorithm: directional pickup: locating the user's position (e.g., within 2m of the air conditioner, at an angle of ±60°) using the time difference of signal reception from the microphones, thus enhancing the target voice signal; noise reduction: utilizing the correlation of environmental noise (e.g., television sound, fan sound) received by the dual microphones, and using an adaptive filtering algorithm (e.g., LMS algorithm) to cancel background noise.

[0023] In this embodiment, the localized voice logic processing unit 23 is connected to the voice command acquisition unit 22 and the secondary control chip 21, respectively. It performs local recognition (such as semantic parsing and keyword extraction) on the acquired voice commands and converts the recognition results into preset recognition codes (such as 001 for "cooling mode" and 002 for "fan speed increase"), which are then transmitted to the secondary control chip 21. The localized voice logic processing unit 23 uses a dedicated voice recognition chip (such as the Speechocean TH1520, which supports offline keyword recognition and semantic parsing) and has a built-in customized model in the field of "air conditioner control" (such as a library of 50+ commands including "cooling," "heating," and "fan speed increase"). Its processing flow is as follows:

[0024] ① Receive analog voice signals collected by dual microphones and convert them into digital signals (sampling rate 16kHz, 16-bit quantization) via ADC.

[0025] ② Perform preprocessing (such as endpoint detection, distinguishing between speech and silence);

[0026] ③ Extract the Mel frequency cepstral coefficients (MFCC) as feature vectors;

[0027] ④ Match with the built-in model, identify keywords (such as "wind speed" and "lower"), and generate the corresponding identification code (such as "003").

[0028] ⑤ The identification code is transmitted to the secondary control chip 21 without cloud intervention, and the identification time for a single instruction is less than 150ms.

[0029] In this embodiment, the secondary control chip 21 receives the identification code from the localized voice logic processing unit 23, performs data processing (such as verification and priority sorting), and transmits the final instruction to the main control chip 11 through a communication interface (such as a UART interface).

[0030] In this embodiment, the display module 24 is connected to the secondary control chip 21 via an I2C interface to display real-time operating information (such as "26℃ Cooling High Fan" and "Humidity 55%)", thereby improving the intuitiveness of user interaction.

[0031] In this embodiment, the wireless network module 25 is connected to the secondary control chip 21, supports Wi-Fi or Bluetooth communication, communicates with the secondary control chip 21 through the UART interface, and supports remote connection with a mobile APP. Users can send commands through the APP (such as "turn on cooling at 26°C tomorrow at 18:00"), and the secondary control chip 21 converts the command into an identification code and transmits it to the main control chip 11 for execution.

[0032] In this embodiment, the infrared receiving module 26 is connected to the secondary control chip 21, using an HS0038 infrared receiver head (receiving wavelength 940nm), and is connected to the secondary control chip 21 through a GPIO interface, compatible with NEC protocol infrared remote controls (the mainstream remote control protocol on the market, with a coverage rate of >90%). When the user uses a traditional remote control, the infrared receiving module 26 decodes the signal into commands such as "temperature +1" and "mode switch", and transmits them to the secondary control chip 21 for processing, realizing redundant compatibility between "voice + remote control" dual control modes and non-voice control scenarios.

[0033] To facilitate understanding of the dual-core control system described above, the following explanation, in conjunction with the specific workflow, provides further details. For specifics, please refer to the appendix. Figure 2 As shown, the system's workflow is as follows:

[0034] Step S1. The user issues a voice command (e.g., reduce the wind speed), and the voice command acquisition unit 22 (dual microphones MIC1 and MIC2) acquires the sound signal.

[0035] Step S2. The localized voice logic processing unit 23 performs noise reduction and feature extraction on the signal, identifies keywords (such as "wind speed" and "lower"), and generates an identification code (such as the corresponding identification code 003).

[0036] Step S3. After receiving the identification code, the secondary control chip 21 verifies its validity and transmits the instruction to the main control chip 11 through the UART interface;

[0037] Step S4. The main control chip 11 controls the basic function unit 12 to operate (such as reducing the speed of the indoor fan 121), and at the same time, the display module 24 of the secondary control module 2 updates the corresponding content ("wind speed: low").

[0038] In addition, if the user sends an infrared command via remote control, the infrared receiving module 26 receives it and transmits it to the secondary control chip 21. The processing logic is the same as that for voice commands.

[0039] In summary, the main control module 1 focuses on the stable control of the basic functional unit 12, avoiding the consumption of its resources by intelligent interactive tasks, thus improving operational reliability. Since the main control module 1 only handles basic control tasks, its load rate is consistently <30% (the load rate of traditional single-chip systems is often >70%), reducing the failure rate by 40% (the failure rate due to excessive load in single-chip systems is 22%, while in this solution it is only 13%). The secondary control module 2 centrally handles interactive tasks (such as voice recognition, display refresh, and remote communication). The computing resources of its secondary control chip 21 can be 100% used for interactive data processing, avoiding interference from basic control tasks on interactive functions. The task division is clear, and the resource utilization efficiency is improved. This effectively solves the problem in traditional single-chip systems where the main control chip 11 needs to simultaneously undertake both "basic control (such as fan adjustment)" and "intelligent interaction (such as voice recognition)" tasks, causing computing resources to be "competed" between the two types of tasks, ultimately preventing either type of function from achieving optimal performance.

[0040] Secondly, the localized voice logic processing unit 23 of the secondary control module 2 enables "end-side recognition", completely eliminating cloud dependence. In particular, it shortens the on-device processing time from voice acquisition to recognition, effectively solving the problem that traditional voice control solutions rely on cloud recognition (requiring the entire process of "acquisition → upload → cloud processing → feedback → execution"), resulting in a total latency of up to 500-1000ms (such as an average latency of 750ms under 4G network), and there is a significant "lag" in user operation and device response.

[0041] In summary, the dual-chip control system in this embodiment, through its "master-slave division of labor" architecture, has achieved a comprehensive improvement over traditional single-chip solutions in key indicators such as response speed, functional expansion, and system stability, providing reliable technical support for the "high-experience and scalable" development of smart air conditioners.

[0042] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any modifications or alterations made by those skilled in the art to the technical solution of this utility model without departing from its scope are equivalent embodiments of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from its scope should be covered within the protection scope of this utility model.

Claims

1. A dual-core control system for an indoor air conditioner, characterized in that: The system includes a main control module (1) and a secondary control module (2). The main control module (1) includes a main control chip (11) and at least one basic functional unit (12) connected to the main control chip (11). The secondary control module (2) includes a secondary control chip (21), a voice command acquisition unit (22), and a localized voice logic processing unit (23). The localized voice logic processing unit (23) is connected to the voice command acquisition unit (22) and the secondary control chip (21) respectively. The voice command acquisition unit (22) is used to receive external voice operation commands. The localized voice logic processing unit (23) is used to identify the content of the received voice operation commands and convert the content into a specified identification code and transmit it to the secondary control chip (21) for data processing. The main control chip (11) is connected to the secondary control chip (21) for communication. The main control chip (11) controls the basic functional unit (12) according to the identification code processed by the secondary control chip (21).

2. The dual-core control system for an air conditioner according to claim 1, characterized in that: The basic functional unit (12) includes an indoor fan (121) and a swing motor (122).

3. The dual-core control system for an air conditioner according to claim 1, characterized in that: The voice command acquisition unit (22) includes two microphones arranged at intervals.

4. The dual-core control system for an air conditioner according to claim 1, characterized in that: The sub-control module (2) also includes a display module (24) that is connected to the sub-control chip (21) and used to display operating information.

5. The dual-core control system for an air conditioner according to claim 1, characterized in that: The sub-control module (2) also includes a wireless network module (25) that is connected to the sub-control chip (21) and used for wireless communication.

6. The dual-core control system for an air conditioner according to claim 1, characterized in that: The sub-control module (2) also includes an infrared receiving module (26) that is connected to the sub-control chip (21) and used to receive remote control infrared commands.

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