Multi-split air conditioning system

Abstract

The utility model belongs to the technical field of multi-split air conditioning system design, and particularly provides a multi-split air conditioning system which comprises an outdoor unit and a plurality of groups of indoor units arranged in parallel. The outdoor unit comprises a first controller, and the indoor unit comprises a second controller. One of the multiple groups of indoor units is a master indoor unit, and the rest are slave indoor units; the outdoor unit comprises a first power line carrier communication module, and the indoor unit comprises a second power line carrier communication module; the first controller communicates with each main indoor unit through the first power line carrier communication module; and the second controller is respectively communicated with the outdoor unit and the slave indoor units in the same group through the second power line carrier communication module. An existing power line is used for communication, additional wiring is not needed, the installation process is simplified, and cost is reduced. And a master-slave communication architecture improves the communication efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-connected air conditioner system design, and particularly relates to a multi-connected air conditioner system. Background Art

[0002] Existing multi-connected communication systems generally rely on traditional wired communication methods, such as RS485 and CAN bus, etc. These technologies can indeed meet the basic requirements of multi-connected systems in terms of control real-time performance and reliability. However, with the progress of technology and the change of market demand, these wired communication methods have gradually exposed some problems.

[0003] First of all, the construction of a wired communication network requires the special laying of dedicated communication lines. This means that when installing a multi-connected system, the path of the communication line must be pre-planned in advance, and corresponding wire pipes and spaces must be reserved in the building structure. This not only increases the complexity of the engineering installation, but also significantly increases the installation cost. Secondly, the wired communication network has problems such as complex communication network and hidden lines. Since the communication lines need to be laid along the building structure, it is difficult to avoid the crossing and overlapping of lines. This not only increases the complexity of the system, but also makes the maintenance of the lines difficult.

[0004] In summary, although traditional wired communication methods have many problems in terms of engineering installation cost, communication network complexity, line hiding, and maintenance difficulty. Therefore, exploring new communication methods, improving the communication efficiency and reliability of multi-connected systems, and reducing installation and maintenance costs have become the urgent needs of the current industry development. Summary of the Invention

[0005] In view of the problems existing in the communication of the existing multi-connected air conditioner system, a communication architecture that is convenient for external maintenance is designed. Specifically, the utility model provides a multi-connected air conditioner system.

[0006] The technical solution of the utility model provides a multi-connected air conditioner system, which includes an outdoor unit and multiple groups of indoor units arranged in parallel; the outdoor unit includes a first controller, and the indoor unit includes a second controller;

[0007] One of the multiple groups of indoor units is the main indoor unit, and the rest are slave indoor units;

[0008] The outdoor unit includes a first power line carrier communication module, and the indoor unit includes a second power line carrier communication module;

[0009] The first controller communicates with each main indoor unit through the first power line carrier communication module;

[0010] The second controller communicates with the outdoor unit and the slave indoor units in the same group through the second power line carrier communication module respectively.

[0011] As a further limitation of the technical solution of the present utility model, both the first power line carrier communication module and the second power line carrier communication module are PLC modules.

[0012] As a further limitation of the technical solution of the present utility model, the PLC module is connected to the power line of the power grid; the PLC module of the indoor unit is connected to the second controller, and the PLC module of the outdoor unit is connected to the first controller.

[0013] As a further limitation of the technical solution of the present utility model, the PLC module includes a PLC chip and a peripheral circuit of the chip;

[0014] The peripheral circuit of the chip includes a DC blocking circuit, a filtering circuit, and a coupling interface;

[0015] The PLC chip is sequentially connected to the power line of the power grid through the filtering circuit and the coupling interface;

[0016] The PLC chip is also connected to the coupling interface through the DC blocking circuit.

[0017] As a further limitation of the technical solution of the present utility model, the power line of the power grid outputs a first power supply through a rectifying circuit; the first power supply is connected to the PLC module;

[0018] The first power supply outputs a second power supply through a voltage conversion circuit;

[0019] The second power supply is respectively connected to the first controller, the second controller, and the PLC chip.

[0020] As a further limitation of the technical solution of the present utility model, the voltage conversion circuit includes a DC conversion circuit including a Schottky diode and a voltage conversion chip;

[0021] The input end of the Schottky diode is connected to the output end of the rectifying circuit. The input end of the Schottky diode is also grounded through a diode. The output end of the Schottky diode is grounded through a first capacitor and a second capacitor connected in parallel. The output end of the Schottky diode is connected to the input end of the voltage conversion chip. The output end of the voltage conversion chip outputs the second power supply through an inductor. The first end of the inductor is grounded through a voltage stabilizing diode. The second end of the inductor is connected to the feedback end of the voltage conversion chip. The second end of the inductor is also grounded through a third capacitor and a fourth capacitor connected in parallel.

[0022] As a further limitation of the technical solution of the present utility model, each main indoor unit is connected to a wired controller.

[0023] As a further limitation of the technical solution of the present utility model, the second controller is further connected with a wireless communication module, and the second controller is connected to an external remote control terminal through the wireless communication module.

[0024] As can be seen from the above technical solutions, the present utility model has the following advantages: By using the existing power lines for communication, no additional wiring is required, which simplifies the installation process and reduces costs. The master-slave communication architecture improves communication efficiency, enabling the entire air-conditioning system to respond more quickly to environmental changes such as temperature changes.

[0025] By reducing the wiring cost, lowering the maintenance difficulty, and improving the communication efficiency, the present utility model can significantly reduce the cost of the entire air-conditioning system.

[0026] In addition, the design principle of the present utility model is reliable, the structure is simple, and it has a very wide application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic block diagram of a system according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] As Figure 1 shown, an embodiment of the present utility model provides a multi-connected air-conditioning system, including an outdoor unit and multiple groups of indoor units arranged in parallel; the outdoor unit includes a first controller, and the indoor units include second controllers;

[0031] One of the multiple groups of indoor units is the main indoor unit, and the rest are slave indoor units;

[0032] The outdoor unit includes a first power line carrier communication module, and the indoor units include second power line carrier communication modules;

[0033] The first controller communicates with each main indoor unit through the first power line carrier communication module;

[0034] The second controller communicates with the outdoor unit and the slave indoor units in the same group respectively through the second power line carrier communication module.

[0035] It should be noted that both the first power line carrier communication module and the second power line carrier communication module are PLC modules.

[0036] The specific working process is as follows:

[0037] When the entire multi-split air conditioner system is powered on or restarted for the first time, the first controller sends a broadcast signal through the first power line carrier communication module (PLC module) on the outdoor unit to attempt to establish communication with each indoor unit in the system. Among the numerous indoor units, a pre-selected indoor unit in the system is identified as the master indoor unit. After the second controller of the master indoor unit receives the signal from the outdoor unit through its second power line carrier communication module, it confirms its identity as the host and prepares to communicate further with the outdoor unit. At the same time, the second controller of the master indoor unit also sends a signal to the slave indoor units in the same group through the power line to establish a communication link with the slave indoor units in the same group. After the communication link is established, two-way data transmission begins between the outdoor unit and the master indoor unit through the first power line carrier communication module and the second power line carrier communication module. The outdoor unit sends monitoring data such as the system operation status, ambient temperature, and humidity to the master indoor unit and receives control information such as the indoor temperature, set temperature, and working mode feedback from the master indoor unit. The master indoor unit performs internal processing based on the received data and instructions and may send control instructions to the slave indoor units in the same group, such as adjusting the wind speed, turning on / off the cooling / heating mode, etc. The slave indoor units receive and execute these instructions through their respective second power line carrier communication modules. During the entire operation of the system, the master indoor unit and the slave indoor units work together to jointly maintain the comfort of the indoor environment. If a certain slave indoor unit fails or malfunctions, it will report to the master indoor unit through the power line carrier communication module. After receiving the failure report, the master indoor unit will perform corresponding processing, such as attempting to repair itself, reporting a serious failure to the outdoor unit, or issuing an alarm to the user. When the user issues a shutdown instruction through the remote control or control panel, this instruction is first received and processed by the master indoor unit. The master indoor unit sends a shutdown instruction to the slave indoor units in the same group through the power line carrier communication module and simultaneously reports the state that the system is about to shut down to the outdoor unit. After confirming that all indoor units have been shut down, the outdoor unit will also perform corresponding shutdown operations, such as shutting down key components such as the compressor and fan, causing the entire system to enter a sleep or standby state.

[0038] The PLC module is connected to the power line of the power grid; the PLC module of the indoor unit is connected to the second controller, and the PLC module of the outdoor unit is connected to the first controller.

[0039] Using the power line of the power grid as the communication medium, there is no need to lay additional communication lines, which greatly simplifies the complexity of system wiring, reduces the installation cost and maintenance difficulty. At the same time, the amount of cable used is reduced, which also conforms to the green and environmentally friendly building design concept.

[0040] The power line communication module can achieve high-speed and stable data transmission on the power line, ensuring real-time communication between the first controller and the main indoor unit, as well as between the second controller and the outdoor unit and the slave indoor units in the same group. This efficient communication mechanism enables the system to quickly respond to control commands, improving the overall response speed and operating efficiency of the system.

[0041] The system adopts a hierarchical control architecture. The outdoor unit serves as the control center, managing all main indoor units through the first controller; and each main indoor unit serves as a sub-control center, managing the slave indoor units in the same group through its second controller. This hierarchical control mode not only simplifies the system structure but also makes management more flexible and efficient. The main indoor unit can independently adjust the operating states of its slave indoor units according to actual needs, achieving more refined control. Through the power line communication module, the system can implement self-detection and fault alarm functions. When a component fails, it can quickly transmit the fault information to the controller and trigger the corresponding protection mechanism to prevent the fault from expanding and ensure the stable operation of the system.

[0042] In some embodiments, the PLC module includes a PLC chip and the peripheral circuit of the chip;

[0043] The peripheral circuit of the chip includes a DC-blocking circuit, a filtering circuit, and a coupling interface;

[0044] The PLC chip is sequentially connected to the power line of the power grid through the filtering circuit and the coupling interface;

[0045] The PLC chip is also connected to the coupling interface through the DC-blocking circuit.

[0046] The DC-blocking circuit prevents the DC component from passing through, preventing the DC component from interfering with the PLC signal and ensuring the purity and transmission efficiency of the signal. The filtering circuit effectively filters out the high-frequency noise and interference signals on the power line of the power grid, ensuring that the signal received by the PLC chip is clear and accurate, thereby improving the reliability and stability of communication.

[0047] The coupling interface serves as a connection bridge between the PLC chip and the power line of the power grid, ensuring that the signal can be efficiently and stably transmitted between the two. Its design is reasonable, which can effectively reduce signal attenuation and reflection, improving the sensitivity and coverage of communication. Through the double protection of the DC-blocking circuit and the filtering circuit, it can effectively prevent abnormal signals such as high voltage and surges in the power grid from directly impacting the PLC chip, reducing the risk of chip damage and extending the service life.

[0048] In some embodiments, the power line of the power grid outputs a first power supply through a rectification circuit; the first power supply is connected to the PLC module;

[0049] The first power supply outputs a second power supply through a voltage conversion circuit;

[0050] The second power supply is respectively connected to the first controller, the second controller and the PLC chip.

[0051] In the embodiment of the present utility model, the first power supply is 12V and the second power supply is 3.3V.

[0052] In some embodiments, the voltage conversion circuit includes a DC conversion circuit including a Schottky diode and a voltage conversion chip;

[0053] The input end of the Schottky diode is connected to the output end of the rectification circuit. The input end of the Schottky diode is also grounded through a diode. The output end of the Schottky diode is grounded through a first capacitor and a second capacitor connected in parallel. The output end of the Schottky diode is connected to the input end of the voltage conversion chip. The output end of the voltage conversion chip outputs the second power supply through an inductor. The first end of the inductor is grounded through a voltage stabilizing diode. The second end of the inductor is connected to the feedback end of the voltage conversion chip. The second end of the inductor is also grounded through a third capacitor and a fourth capacitor connected in parallel.

[0054] The rectification circuit converts the alternating current on the grid power line into direct current, that is, the first power supply (such as 12V), to provide a stable DC basic power supply for the system. This ensures that subsequent circuits (such as PLC modules, controllers, etc.) can work in a stable voltage environment, reducing faults and performance degradation caused by voltage fluctuations.

[0055] The voltage conversion circuit realizes the efficient conversion from the first power supply (12V) to the second power supply (3.3V) through the combination of a Schottky diode and a voltage conversion chip. The Schottky diode, as a pre-stage voltage reduction component, can initially reduce the voltage and filter out some noise; while the voltage conversion chip further precisely adjusts the voltage to the required level (such as 3.3V) to meet the power supply requirements of sensitive electronic components such as PLC chips and controllers.

[0056] A variety of protection measures are designed in the circuit. For example, the diode in front of the Schottky diode is grounded to prevent reverse voltage impact; the parallel capacitors are used for filtering and decoupling to reduce power supply noise; the voltage stabilizing diode is used to limit the fluctuation range of the output voltage to prevent overvoltage from damaging subsequent circuits. These protection measures together improve the stability and reliability of the system. The second power supply (3.3V) obtained through the voltage conversion circuit is accurately distributed to key components such as the PLC chip, the first controller and the second controller. This accurate power distribution ensures that each component can work normally within its rated voltage range, improving the overall performance and energy efficiency of the system.

[0057] The voltage conversion circuit in the embodiment of the present utility model adopts a modular design, which is convenient for expansion and adjustment according to actual requirements. For example, the model and parameters of the voltage conversion chip can be adjusted according to the power supply requirements of different controllers; or additional filtering and protection circuits can be added to enhance the anti-interference ability of the system. Through efficient voltage conversion and precise power distribution, the multi-connected air conditioner system in the embodiment of the present utility model can reduce energy consumption and costs while ensuring performance. This not only conforms to the environmental protection concept of energy conservation and emission reduction, but also improves the market competitiveness of the product.

[0058] It should be noted that each main indoor unit is connected to a wired controller. The architecture of this application is that one wired controller controls multiple indoor units.

[0059] In some embodiments, the second controller is further connected with a wireless communication module, and the second controller is connected to an external remote control terminal through the wireless communication module.

[0060] In this embodiment, the remote control terminal can also communicate with the second controller of the indoor unit remotely to remotely control the air conditioner system.

[0061] Each main indoor unit is connected to a wired controller, but the unique feature of this application is that one wired controller can control multiple indoor units. This design greatly simplifies the user operation interface, enabling the user to easily manage the operating states of multiple indoor units through a single wired controller, including temperature setting, wind speed adjustment, mode switching, etc., improving the convenience and efficiency of use. Compared with the traditional method of equipping each indoor unit with an independent wired controller, the design of this application reduces the number of wired controllers, thus saving indoor space and making the home or office environment cleaner and more beautiful.

[0062] Through the wireless communication module, the second controller can establish a connection with an external remote control terminal. This design enables the user to not only control the air conditioner system indoors through the wired controller, but also use remote devices such as smartphones and tablets to remotely control the air conditioner system anywhere with network coverage.

[0063] Although the present utility model has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present utility model is not limited thereto. Without departing from the spirit and essence of the present utility model, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present utility model, and all such modifications or substitutions should be within the scope of the present utility model. / Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present utility model, and all should be covered within the protection scope of the present utility model.

Claims

1. A multi-connected air conditioning system, characterized in that, It includes an outdoor unit and multiple groups of indoor units arranged in parallel; the outdoor unit includes a first controller, and the indoor unit includes a second controller; Among the multiple groups of indoor units, one is the main indoor unit and the rest are slave indoor units; The outdoor unit includes a first power line carrier communication module, and the indoor unit includes a second power line carrier communication module; The first controller communicates with each main indoor unit through the first power line carrier communication module; The second controller communicates with the outdoor unit and the slave indoor units in the same group respectively through the second power line carrier communication module.

2. The multi-connected air-conditioning system according to claim 1, wherein Both the first power line carrier communication module and the second power line carrier communication module are PLC modules.

3. The multi-connected air conditioner system according to claim 2, wherein The PLC module is connected to the power line of the power grid; the PLC module of the indoor unit is connected to the second controller, and the PLC module of the outdoor unit is connected to the first controller.

4. The multi-connected air conditioner system according to claim 3, wherein The PLC module includes a PLC chip and the peripheral circuit of the chip; The peripheral circuit of the chip includes a DC blocking circuit, a filtering circuit, and a coupling interface; The PLC chip is sequentially connected to the power line of the power grid through the filtering circuit and the coupling interface; The PLC chip is also connected to the coupling interface through the DC blocking circuit.

5. The multi-connected air conditioner system according to claim 4, characterized in that, The power line of the power grid outputs a first power supply through a rectifying circuit; the first power supply is connected to the PLC module; The first power supply outputs a second power supply through a voltage conversion circuit; The second power supply is respectively connected to the first controller, the second controller, and the PLC chip.

6. The multi-connected air conditioning system according to claim 5, characterized in that, The voltage conversion circuit includes a DC conversion circuit including a Schottky diode and a voltage conversion chip; The input end of the Schottky diode is connected to the output end of the rectifying circuit. The input end of the Schottky diode is also grounded through a diode. The output end of the Schottky diode is grounded through a first capacitor and a second capacitor connected in parallel. The output end of the Schottky diode is connected to the input end of the voltage conversion chip. The output end of the voltage conversion chip outputs the second power supply through an inductor. The first end of the inductor is grounded through a voltage stabilizing diode. The second end of the inductor is connected to the feedback end of the voltage conversion chip. The second end of the inductor is also grounded through a third capacitor and a fourth capacitor connected in parallel.

7. The multi-connected air conditioner system according to claim 6, wherein Each main indoor unit is connected to a wired controller.

8. The multi-connected air-conditioning system according to claim 7, characterized in that, The second controller is also connected with a wireless communication module, and the second controller is connected to an external remote control terminal through the wireless communication module.

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