Multi-channel heating controller based on power carrier communication

Abstract

The utility model relates to the technical field of heating, and provides a multipath heating controller based on power supply carrier communication, which comprises a main controller, a first main control module, a first power supply module, a relay module, a bus communication module, a first key module and a first display module, the temperature controller comprises a second main control module, a second power supply module, a communication interface module, a temperature and humidity module, a second key module and a second display module; and the bus communication module of the master controller is connected with the communication interface modules of the temperature controllers in sequence through two buses. Through cooperation of the bus communication module, the communication interface module and two buses, a power supply line and a communication line between the master controller and the temperature controller are combined together in a low-voltage power supply carrier wave mode, and polarity division between lines is not needed. While the low-voltage electricity utilization safety requirement of a customer is met, the problem of wrong line connection in the installation process is reduced, and meanwhile, the use cost is greatly reduced by changing a three-line and four-line connection mode into a two-line connection mode.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a multi-channel heating controller based on power carrier communication. Background Art

[0002] At present, the thermostat (slave) and the main controller (host) of the household wired multi-channel heating system in the market all use 3-wire or 4-wire communication. Whether it is 3-wire or 4-wire, the line polarity function needs to be connected one by one during the installation process. Otherwise, the polarity or function mismatch will cause the product to not work properly, and some even burn out. With the widespread application of power carrier communication technology. A new multi-channel heating controller that only needs 2 power supplies to solve the power supply and communication between the thermostat (slave) and the main controller (host) has become a market demand. Utility Model Content

[0003] In order to solve the deficiencies existing in the above-mentioned prior art, the utility model provides a multi-channel heating controller based on power carrier communication, including a main controller, including a first main control module, and a first power module, a relay module, a bus communication module, a first button module and a first display module connected to the first main control module; at least one thermostat, the thermostat including a second main control module, and a second power module, a communication interface module, a temperature and humidity module, a second button module and a second display module connected to the second main control module; the bus communication module of the main controller is connected to the communication interface module of the thermostat in sequence through two buses; the bus communication module includes a first sending circuit and a first receiving circuit connected in sequence; the communication interface module includes a second sending circuit and a second receiving circuit connected in sequence.

[0004] Further, the first sending circuit includes a resistor R29, a resistor R30, a resistor R31, a transistor Q2, a MOS transistor Q1, a diode D3, and a diode D5, the base of the transistor Q2 is connected to the resistor R31, the emitter of the transistor Q2 is grounded, the two ends of the resistor R30 are respectively connected to the collector of the transistor Q2 and the gate of the MOS transistor Q1, the resistor R29 is connected across the gate of the MOS transistor Q1 and the source of the MOS transistor Q1, the source of the MOS transistor Q1 is connected to the positive electrode of the diode D5, the negative electrode of the diode D5 is connected to the positive electrode of the diode D3, the negative electrode of the diode D3 is connected to the drain of the MOS transistor Q1, and is connected to the first receiving circuit.

[0005] Furthermore, the first receiving circuit includes a resistor R18, a capacitor C41, a resistor R23, a resistor R25, and a resistor R28. One end of the resistor R18 is connected to the first sending circuit, and the other end is connected to the bus and connected to the capacitor C41. The other end of the capacitor C41 is connected to the resistor R25, and the other end of the resistor R25 is connected to the resistor R23 and the resistor R28. The other end of the resistor R23 is connected to the power module, and the other end of the resistor R28 is grounded.

[0006] Furthermore, the second sending circuit includes resistor R9, resistor R11, resistor R12, resistor R13, resistor R14 and transistor Q1, resistor R11, resistor R12, resistor R13 and resistor R14 are connected in parallel to the emitter of transistor Q1, the base of transistor Q1 is connected to the second main control module through resistor R9, and the collector of transistor Q1 is connected to the second receiving circuit.

[0007] Furthermore, the second receiving circuit includes a capacitor C4, a resistor R37, a resistor R5, and a resistor R36. One end of the capacitor is connected to the second sending circuit, and the other end is connected to the resistor R37. The other end of the resistor R37 is connected to the resistor R5 and the resistor R36. The other end of the resistor R5 is connected to the second power supply module, and the other end of the resistor R36 is grounded.

[0008] Furthermore, the main controller is also provided with an RS485 communication module, and the RS485 communication module is connected to the first main control module.

[0009] Furthermore, the first power supply module includes a first step-down circuit, a second step-down circuit, a third step-down circuit and a fourth step-down circuit, the output end of the first step-down circuit is connected to the input end of the second step-down circuit, and the output end of the second step-down circuit is respectively connected to the input end of the third step-down circuit and the input end of the fourth step-down circuit.

[0010] Furthermore, the main controller is also provided with a first storage module.

[0011] Furthermore, the temperature controller is also provided with a rectifier module, and the output end of the rectifier module is connected to the input end of the communication interface module and the input end of the second power supply module.

[0012] Furthermore, the thermostat is provided with a second storage module.

[0013] Based on the above, compared with the prior art, the utility model provides a multi-channel heating controller based on power carrier communication, which combines the power supply line and communication line between the main controller and the thermostat in a low-voltage power carrier mode through the bus communication module, the communication interface module and the two buses, and does not need to distinguish the polarity between the lines. While meeting the customer's low-voltage power safety requirements, it reduces the problem of wrong line connection during the installation process, and the wiring method is changed from 3-wire and 4-wire to 2-wire, which greatly reduces the cost of use.

[0014] Other features and beneficial effects of the utility model will be described in the subsequent description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other beneficial effects of the utility model can be achieved and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positional relationships described in the drawings in the following description are based on the directions of the components shown in the diagrams unless otherwise specified.

[0016] Figure 1 The utility model provides a structural schematic diagram of a multi-channel heating controller based on power carrier communication;

[0017] Figure 2 A schematic diagram of the structure of the main controller provided by the utility model;

[0018] Figure 3 A schematic diagram of the structure of the temperature controller provided by the utility model;

[0019] Figure 4 A circuit schematic diagram of the first main control module of the main controller provided by the utility model;

[0020] Figure 5 A circuit schematic diagram of the main controller bus communication module provided by the utility model;

[0021] Figure 6 The circuit schematic diagram of the thermostat communication interface module provided by the utility model;

[0022] Figure 7 A circuit schematic diagram of the first power supply module of the main controller provided by the utility model;

[0023] Figure 8 Another circuit schematic diagram of the first power supply module of the main controller provided by the utility model;

[0024] Fig. 9 A circuit schematic diagram of the main controller relay module provided by the utility model;

[0025] Fig.10 The circuit schematic diagram of the first key module of the main controller provided by the utility model;

[0026] Fig.11 A circuit schematic diagram of the first display module of the main controller provided by the utility model;

[0027] Fig.12 The circuit schematic diagram of the RS485 communication module of the main controller provided by the utility model;

[0028] Fig.13 A circuit schematic diagram of the first storage module of the main controller provided by the utility model;

[0029] Fig.14 The circuit schematic diagram of the second main control module of the thermostat provided by the utility model;

[0030] Fig.15 The circuit schematic diagram of the temperature controller rectifier module provided by the utility model;

[0031] Fig.16 A circuit schematic diagram of the second power supply module of the thermostat provided by the utility model;

[0032] Fig.17 The circuit schematic diagram of the second button module of the thermostat provided by the utility model;

[0033] Fig.18 A circuit schematic diagram of the second storage module of the thermostat provided by the utility model;

[0034] Fig.19 The circuit schematic diagram of the temperature and humidity module of the thermostat provided by the utility model;

[0035] Fig. 20 This is a circuit schematic diagram of the second display module of the temperature controller provided by the utility model. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments; the technical features designed in different implementation modes of the utility model described below can be combined with each other as long as they do not conflict with each other; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be noted that all terms (including technical terms and scientific terms) used in the present invention have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and cannot be understood as limitations on the present invention; it should be further understood that the terms used in the present invention should be understood to have meanings consistent with the meanings of these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined in this utility model.

[0038] See also Figure 1 The utility model provides a multi-channel heating controller based on power carrier communication, including a main controller and at least one temperature controller.

[0039] like Figure 2 As shown, the main controller includes a first main control module, a first power supply module connected to the first main control module, a relay module and a bus communication module, a first button module and a first display module.

[0040] like Figure 3 As shown, the temperature controller includes a second main control module, and a second power supply module, a communication interface module, and a temperature and humidity module connected to the second main control module.

[0041] like Figure 1 As shown, the bus communication module of the main controller is connected to the communication interface module of the temperature controller in sequence through two buses; the bus communication module includes a first sending circuit and a first receiving circuit connected in sequence; the communication interface module includes a second sending circuit and a second receiving circuit connected in sequence.

[0042] In specific implementation, the controller is divided into two parts, one is the main controller (host), and the other is the thermostat (slave). The main controller is the execution unit, which mainly obtains the information of each thermostat through the bus, such as the current temperature, set temperature, control mode, user operation information, etc. And send this information to the screen of the first display module for users to view. At the same time, each thermostat transmits information and combines the current control logic for calculation, executes the control of the corresponding actuator (valve) and the entire wall-mounted boiler (boiler) to achieve good temperature control and energy saving effects. The thermostat (slave) is a collection unit, which mainly collects the temperature in the current area and the setting parameters of the user's operation through its own sensor. The information is transmitted to the execution unit (host) through the bus, and the current control status of the host is obtained at the same time. The current collected temperature information, user setting information, and main control unit control information are displayed on the screen through the second display module so that users can view and understand the current control effect.

[0043] like Figure 1As shown, the main controller and the thermostat are connected using two buses, wherein there is at least one thermostat, and preferably three in this embodiment. The two buses of the main controller are first connected to the first thermostat, and then led out from the first thermostat to the second thermostat, and the third thermostat has a similar principle. The main controller is provided with a bus communication module, and each thermostat is provided with a communication interface module. The bus communication module and the communication interface module are connected through two buses. The bus communication module processes the signal sent by the first main control module and the power supply through the first sending circuit, and outputs high and low level electrical signals to the thermostat. The thermostat receives the high and low level electrical signals and converts them through the second receiving circuit, and inputs the signal to the second main control module. The signal output by the second main control module of the thermostat is converted by the second sending circuit and input to the first receiving circuit of the main controller bus communication module for processing. After processing, the first receiving circuit transmits the signal to the first main control module.

[0044] There is only one bus communication module, and the communication interface module is determined according to the number of thermostats. Although the two buses connected from the host pass through at least one thermostat in turn, the signal sent by the bus communication module is numbered, so that only the communication interface module of the corresponding thermostat can identify, receive and process it. Through the cooperation of the bus communication module, the communication interface module and the two buses, the power supply line and communication line between the main controller and the thermostat are combined in the form of a low-voltage power carrier, and the polarity between the lines does not need to be divided. While meeting the customer's low-voltage power safety requirements, it reduces the problem of wrong line connection during the installation process. At the same time, the wiring method is changed from 3-wire and 4-wire to 2-wire, which greatly reduces the cost of use.

[0045] In one embodiment, if Figure 4 As shown, the first main control module is composed of MCU and peripheral circuits. The MCU adopts Saiyuan ITEIT9832, which has two 32-bit RISC CPUs with a main frequency of 500MHZ and a display-specific MIPI interface and a 2D image acceleration chip that fully meets the system's daily work operations, the communication requirements between the first display module and MCU and other working modules. In the figure, the clock oscillator circuit composed of crystal oscillator Y1 12MHZ and capacitors C35 and C36 mainly provides a basic clock frequency for the system, and the secondary clock oscillator circuit composed of crystal oscillator Y3 32.768 and capacitors C51 and C52 mainly provides a precise secondary clock frequency for the system to meet the system timing requirements.

[0046] In one embodiment, if Figure 5As shown, the first sending circuit includes a resistor R29, a resistor R30, a resistor R31, a transistor Q2, a MOS transistor Q1, a diode D3, and a diode D5. The base of the transistor Q2 is connected to the resistor R31, the emitter of the transistor Q2 is grounded, the two ends of the resistor R30 are respectively connected to the collector of the transistor Q2 and the gate of the MOS transistor Q1, the resistor R29 is connected across the gate of the MOS transistor Q1 and the source of the MOS transistor Q1, the source of the MOS transistor Q1 is connected to the positive electrode of the diode D5, the negative electrode of the diode D5 is connected to the positive electrode of the diode D3, the negative electrode of the diode D3 is connected to the drain of the MOS transistor Q1, and is connected to the first receiving circuit.

[0047] In specific implementation, when the main controller needs to send a high level "1" to the thermostat, the first main control module outputs "1" as a 3.3V voltage TX2, turns on transistor Q2 through resistors R29, R30, and R31, and turns on MOS tube Q1. At this time, the bus voltage is 24V and is directly transmitted to the bus. When the main controller needs to send a low level "0" to the thermostat, the first main control module outputs "0" as a 0V voltage TX2, turns off transistor Q2 through a current-limiting resistor, and turns off MOS tube Q1. The voltage is reduced to 22V through diodes D5 and D3 and is transmitted to the bus and input into the thermostat.

[0048] In one embodiment, if Figure 5 As shown, the first receiving circuit includes a resistor R18, a capacitor C41, a resistor R23, a resistor R25, and a resistor R28. One end of the resistor R18 is connected to the first sending circuit, and the other end is connected to the bus and connected to the capacitor C41. The other end of the capacitor C41 is connected to the resistor R25, and the other end of the resistor R25 is connected to the resistor R23 and the resistor R28. The other end of the resistor R23 is connected to the power module, and the other end of the resistor R28 is grounded.

[0049] Specifically, resistor R18 is a bus signal sampling resistor, and capacitor C41 is a bootstrap capacitor C41. When the thermostat sends a signal, the sent data will be converted into bus current, and the voltage signal of the bus master controller end will be converted through the signal sampling resistor. When the thermostat end sends a signal "0", the bus current remains unchanged at this time, and a small current is used for normal use. The voltage difference between the two ends of resistor R18 is small, and the connection between the bootstrap capacitor C41 and the resistor R18 is a high voltage. When the slave end sends a signal 1, it will be converted into a larger bus current. At this time, the voltage difference between the two ends of resistor R18 becomes larger, and the voltage at the connection between the bootstrap capacitor C41 and the resistor R18 becomes lower. When the bus has data transmission, the sampling resistor R18 acts, and a regular voltage change is generated at the host receiving end. The bootstrap capacitor C41, resistor R23, resistor R25 and resistor R28 form a receiving network to collect data from the bus.

[0050] Preferably, a self-recovering fuse F1 is provided between the bus and the capacitor C41 to protect the bus and prevent the user from accidentally short-circuiting the two lines of the bus.

[0051] In one embodiment, the second sending circuit includes a resistor R9, a resistor R11, a resistor R12, a resistor R13, a resistor R14 and a transistor Q1, the resistors R11, R12, R13 and R14 are connected in parallel to the emitter of the transistor Q1, the base of the transistor Q1 is connected to the second main control module through the resistor R9, and the collector of the transistor Q1 is connected to the second receiving circuit.

[0052] When implementing it, Figure 6 As shown, the temperature controller converts the transmitted data into current and loads it to the bus. The signal sampling resistor at the main controller converts the bus current into a variable voltage. When the temperature controller sends the data "0", the output is 0V TXBUS, and the transistor Q1 is in the off state.

[0053] The bus current remains unchanged. When data 1 is sent, the output is 3.3V TXBUS. The transistor Q1 is in the current amplification state, converting the input 3.3V into a high current of the bus and loading it onto the bus. The signal sampling resistor at the main controller end converts the high current into a high voltage difference, converting the data sent by the slave into a voltage change of the bus host. Resistor R9 has a current limiting function. Resistor R11, resistor R12, resistor R13 and resistor R14 are emitter bias resistors, which stabilize the working state of the transistor and provide protection.

[0054] In one embodiment, if Figure 6 As shown, the second receiving circuit includes a capacitor C4, a resistor R37, a resistor R5, and a resistor R36. One end of the capacitor C4 is connected to the second sending circuit, and the other end is connected to the resistor R37. The other end of the resistor R37 is connected to the resistor R5 and the resistor R36. The other end of the resistor R5 is connected to the second power supply module, and the other end of the resistor R36 is grounded.

[0055] Specifically, capacitor C4 is a bootstrap capacitor C4. When the bus voltage changes regularly under the loading of the data signal during data transmission, the bootstrap capacitor C4 and the resistor R37 will produce regular changes in the bus voltage change. Further, the resistor R5 and the resistor R36 form a voltage divider circuit to provide a reference level, thereby obtaining a regular voltage signal, which is then sent to the second main control module through RXBUS. When the bus voltage increases, the RXBUS voltage will increase, and when the bus voltage decreases, the RXBUS voltage will also decrease. The second main control module judges the high and low change values ​​and time of the input signal by sampling, and converts it into a digital signal of 1 and 0.

[0056] In one embodiment, the first power supply module includes a first step-down circuit, a second step-down circuit, a third step-down circuit and a fourth step-down circuit, the output end of the first step-down circuit is connected to the input end of the second step-down circuit, and the output end of the second step-down circuit is respectively connected to the input end of the third step-down circuit and the input end of the fourth step-down circuit.

[0057] The first step-down circuit is Figure 7 As shown, it converts 220V mains electricity into 24V power used by the bus communication power supply module. This part is the mains AC 220V, which passes through the fuse F1, the fuse resistor R63, the varistor 471 and the rectifier bridge DB1, and then passes through the capacitor C66, the inductor L6 and the capacitor C67 to form a filter network to convert it into DC high voltage, and then through the power chip OB25134 and the transformer T1 to convert it into a DC low voltage 24V output. The resistor R58 and the resistor R62 are the starting resistors of the power chip OB25134, and the diode D9, the resistor R64 and the capacitor C70 form the power supply network of the power chip OB25134. The base resistor R65 and the resistor R68 are for the transmission quasi-voltage adjustment, the resistor R72 chip current limiting resistor, the resistor R60, the resistor R57, the capacitor C63 and the diode D8 form an RCD absorption network to absorb the transformer oscillation high voltage protection chip. The output capacitor C64 and the capacitor C65 are for the output 24V filtering.

[0058] The second step-down circuit is Figure 8 As shown, the output 24V is converted into the relay working voltage 12V. This part is mainly completed by the step-down network composed of DCDC step-down chip U17 TPP36208 and inductor L4, resistor R51, resistor R53, capacitor C57, capacitor C58, capacitor C60 and capacitor C61.

[0059] The third step-down circuit is Figure 8 As shown, the 12V voltage is converted into 3.3V voltage for the first main control module MCU, the storage module, the first display module, and the RS485 module. This part is mainly completed by a step-down network composed of a DCDC step-down chip U2 and an inductor L2, a resistor R42, a resistor R7, a resistor R39, a capacitor C2, a capacitor C4, a capacitor C7, a capacitor C8 and a capacitor C9.

[0060] The fourth step-down circuit is as follows Figure 8 As shown, the 12V voltage is converted into the core voltage of the first main control module MCU unit 1.2V. This part is mainly completed by the DCDC step-down chip U3MP1470 and the inductor L3 4.7UH, resistor R12, resistor R13, resistor R14, capacitor C1, capacitor C23, capacitor C31, capacitor C32 and capacitor C33 to form a step-down network.

[0061] In one embodiment, the relay module is used to control the on and off of the relay, thereby controlling the operation of the wall-mounted boiler, water pump and actuator. The wall-mounted boiler heats the water. After the water is heated to a certain temperature, the water pump is controlled to extract the hot water in the wall-mounted boiler and circulate it in the main heating pipeline. The first main control module controls the opening of the corresponding relay module to control the on and off of the actuator and the related switch valves, control the flow of hot water in the corresponding area, and thereby control the heating temperature of the relevant area.

[0062] like Fig. 9 As shown in the figure, this module consists of a control relay and a control circuit, and the output is directly connected to the user's heating control equipment (actuator, boiler, pump). The relay model is Hongfa HF5F, and the control circuit is completed by the chip LNK2003. The first main control module MCU controls the relay switch through the control chip LNK2003 through the IO (relay1--relay5 network number) control port to realize the control of the user's heating equipment.

[0063] In one embodiment, if Fig.10 As shown, the first button module is completed by the Saiyuan microcontroller SC92F8481, and the dedicated touch port of the SC92F8481 chip is connected to resistors R17, R19, R20, R22 and conductive pads JB1, JB2, JB3 and JB4, which detect and determine the user's finger operation input information through the human finger contact capacitor charging and discharging method, and transmit the user operation information to the first main control module MCU through the serial port.

[0064] In one embodiment, if Fig.11 As shown, the first display module adopts CNK 5-inch screen CNK0500 with a resolution of 600*480. The screen interface adopts MIPI interface and is directly driven by the first main control module MCU. The backlight is driven by the first main control module MCU through PWM control of Shengbang Micro constant current chip SGM3752.

[0065] In one embodiment, the main controller is further provided with an RS485 communication module, and the RS485 communication module is connected to the first main control module.

[0066] Specifically, the control status of each area and the entire wall-mounted boiler (boiler) can be uploaded to the host computer through RS485 communication, so that users can remotely view and control it. Fig.12 As shown, the RS485 communication module uses the RS485 communication chip model 3PEAKTP8485E, which is responsible for the controller sending data outward. The RS485 communication module communicates with the main control MCU through the serial port for transmission control. TVS1, TVS2, and TVS3 protect the RS485 bus, and resistors R66 and R71 stabilize the RS485 bus potential.

[0067] In one embodiment, the main controller is further provided with a first storage module. Fig.13 As shown, the first storage module is composed of a memory chip W25Q128 that transmits data with the first main control module MCU through QSPI communication to complete the storage of codes, pictures and related data.

[0068] In one embodiment, if Fig.14 As shown in the figure, the second main control module of the temperature controller is composed of MCU and peripheral circuits. The MCU adopts Renesas R7FA2E1A92. The chip has a built-in 48MHZ oscillator, which eliminates the need for peripheral oscillators. At the same time, the high operating frequency of 48MHZ fully meets the system's daily operation, display, and communication requirements between the central control unit and other working modules. The chip also has a multi-channel dual-mode touch circuit, which can directly complete the touch button function through resistors and external touch pads. The secondary clock oscillation circuit composed of crystal oscillator Y232.768K and capacitors C35 and C36 in the figure mainly provides a precise secondary clock frequency for the system to meet the system timing requirements.

[0069] In one embodiment, the temperature controller is further provided with a rectifier module, such as Fig.15 As shown, the output end of the rectifier module is connected to the input end of the communication interface module and the input end of the second power module. The rectifier module consists of four diodes D3, D4, D5 and D6. This module automatically extracts the positive and negative polarity of the bus power supply mainly through the unidirectionality of the diode. For the use of the rear power supply and communication, capacitor C37, capacitor C31 and capacitor C29 are mainly used to filter out some interference generated during the bus transmission process.

[0070] In one embodiment, if Fig.16 As shown, the second power module mainly converts the bus input voltage to 3.3V for the main control MCU single chip unit, storage module, second display module, and temperature and humidity module. This part is mainly completed by the DCDC buck chip U2 TPP36208 and the inductor L1, resistor R23, resistor R25, resistor R28, capacitor C16, capacitor C17, capacitor C22, and capacitor C23 to form a buck network. Transistor Q3, transistor Q4, resistor R26, and resistor R22 form a current limiting network to prevent the abnormality of a single auxiliary machine from affecting the bus.

[0071] In one embodiment, if Fig.17 As shown, the second key module is composed of conductive pads JB1, conductive pads JB2, conductive pads JB3 and resistors R15, resistor R17, resistor R19 and the touch key port of the main control MCU. It detects the user's finger operation and transmits corresponding information through the human finger contact capacitor charging and discharging method.

[0072] In one embodiment, if Fig.18As shown, the temperature controller is also provided with a second storage module, which transmits data with the second main control module MCU through the SPI communication mode by the memory chip GD25Q64 to complete the storage of display pictures and related data.

[0073] In one embodiment, if Fig.19 As shown, the temperature and humidity module is mainly responsible for collecting the current ambient temperature and humidity by the temperature and humidity chip SHTC3, and transmits the data to the second main control module MCU through the I2C communication method.

[0074] In one embodiment, if Fig. 20 As shown, the second display module uses CNK 2.8-inch screen CNK0280, with a resolution of 320*240. The screen communicates with the second main control module MCU through the SPI interface to receive information transmitted by the display MCU, and the backlight is driven by the MCU through PWM control MOSQ2. The first display module and the second display module both use color screen display, good display, touch-type operation feeling, better meet the requirements of human-computer interaction in modern society, greatly meet the needs of the market and customers, and achieve good installation and use effects.

[0075] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the utility model can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0076] Although the terms such as main controller, thermostat, first main control module, bus communication module, communication interface module, first power module, relay module, first key module, first display module, RS485 communication module, first storage module, second main control module, rectifier module, second power module, second key module, second storage module, temperature and humidity module and second display module are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model; the terms "first", "second", etc. (if any) in the specification and claims of the embodiment of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A multi-channel heating controller based on power carrier communication, characterized in that: include: The main controller includes a first main control module, and a first power supply module, a relay module, a bus communication module, a first button module and a first display module connected to the first main control module; At least one thermostat, the thermostat comprising a second main control module, and a second power supply module, a communication interface module, a temperature and humidity module, a second button module and a second display module connected to the second main control module; The bus communication module of the main controller is connected to the communication interface module of the temperature controller in sequence through two buses; The bus communication module includes a first sending circuit and a first receiving circuit connected in sequence; the communication interface module includes a second sending circuit and a second receiving circuit connected in sequence.

2. The multi-channel heating controller based on power carrier communication according to claim 1 is characterized in that: The first sending circuit includes a resistor R29, a resistor R30, a resistor R31, a transistor Q2, a MOS transistor Q1, a diode D3, and a diode D5. The base of the transistor Q2 is connected to the resistor R31, the emitter of the transistor Q2 is grounded, the two ends of the resistor R30 are respectively connected to the collector of the transistor Q2 and the gate of the MOS transistor Q1, the resistor R29 is connected across the gate of the MOS transistor Q1 and the source of the MOS transistor Q1, the source of the MOS transistor Q1 is connected to the positive electrode of the diode D5, the negative electrode of the diode D5 is connected to the positive electrode of the diode D3, the negative electrode of the diode D3 is connected to the drain of the MOS transistor Q1, and is connected to the first receiving circuit.

3. The multi-channel heating controller based on power carrier communication according to claim 1 is characterized in that: The first receiving circuit includes a resistor R18, a capacitor C41, a resistor R23, a resistor R25, and a resistor R28. One end of the resistor R18 is connected to the first sending circuit, and the other end is connected to the bus and connected to the capacitor C41. The other end of the capacitor C41 is connected to the resistor R25, and the other end of the resistor R25 is connected to the resistor R23 and the resistor R28. The other end of the resistor R23 is connected to a power module, and the other end of the resistor R28 is grounded.

4. The multi-channel heating controller based on power carrier communication according to claim 1 is characterized in that: The second sending circuit includes a resistor R9, a resistor R11, a resistor R12, a resistor R13, a resistor R14 and a transistor Q1, wherein the resistor R11, the resistor R12, the resistor R13 and the resistor R14 are connected in parallel to the emitter of the transistor Q1, the base of the transistor Q1 is connected to the second main control module through the resistor R9, and the collector of the transistor Q1 is connected to the second receiving circuit.

5. The multi-channel heating controller based on power carrier communication according to claim 1 is characterized in that: The second receiving circuit includes a capacitor C4, a resistor R37, a resistor R5, and a resistor R36. One end of the capacitor is connected to the second sending circuit, and the other end is connected to the resistor R37. The other end of the resistor R37 is connected to the resistor R5 and the resistor R36. The other end of the resistor R5 is connected to the second power supply module, and the other end of the resistor R36 is grounded.

6. The multi-channel heating controller based on power carrier communication according to claim 1 is characterized in that: The main controller is also provided with an RS485 communication module, and the RS485 communication module is connected to the first main control module.

7. The multi-channel heating controller based on power carrier communication according to claim 1 is characterized in that: The first power supply module includes a first step-down circuit, a second step-down circuit, a third step-down circuit and a fourth step-down circuit. The output end of the first step-down circuit is connected to the input end of the second step-down circuit, and the output end of the second step-down circuit is respectively connected to the input end of the third step-down circuit and the input end of the fourth step-down circuit.

8. The multi-channel heating controller based on power carrier communication according to claim 1 is characterized in that: The main controller is also provided with a first storage module.

9. The multi-channel heating controller based on power carrier communication according to claim 1 is characterized in that: The temperature controller is further provided with a rectifier module, and the output end of the rectifier module is connected to the input end of the communication interface module and the input end of the second power supply module.

10. The multi-channel heating controller based on power carrier communication according to claim 1 or 9, characterized in that: The temperature controller is provided with a second storage module.

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