Communication device of air conditioning system and air conditioning system

Abstract

The application provides a communication device of an air conditioning system and the air conditioning system. The communication device comprises a host communication circuit, a first power module and a slave communication circuit. The host communication circuit is connected with a carrier communication cable to couple a communication signal to the carrier communication cable. The first power module comprises a first power output end used for power supply to the carrier communication cable. The slave communication circuit obtains power supply and the communication signal from the carrier communication cable. The host communication circuit obtains power supply from the first power output end or the carrier communication cable, which is beneficial to simplify the communication structure of the air conditioning system and greatly reduce the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly to a communication device of an air conditioning system and the air conditioning system. BACKGROUND

[0002] The air conditioning system is generally referred to as a refrigeration system composed of an outdoor unit, an indoor unit and other air conditioning equipment. The outdoor unit and the indoor unit need to form a communication network for communication. At present, the air conditioning system mainly uses wired communication, and needs to use a dedicated communication cable as a communication channel. A multi-split air conditioning system is generally composed of one outdoor unit and multiple indoor units, and belongs to a one-to-many system. When performing multi-node and long-distance communication, common mode interference needs to be suppressed. The conventional processing scheme is local isolation. The node supplies power to the communication circuit through a separate power supply. This scheme needs to design a separate power supply for each node, which is complex and has high design cost, making the multi-node communication structure complex. If local isolation is not used, a separate physical connection line can be used to connect the power supply ground of all nodes. Since a connection line is needed to connect each node in the air conditioning system to the common ground, there are problems of great installation difficulty and high cost when building a long-distance multi-node communication network. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a communication device of an air conditioning system and the air conditioning system, which is advantageous for simplifying the communication structure of the air conditioning system and greatly reducing the cost.

[0004] In a first aspect, an embodiment of the present application provides a communication device of an air conditioning system, the air conditioning system comprising a master and at least one slave, the master and the slave being connected through a carrier communication cable, the communication device comprising a master communication circuit, a first power supply module and a slave communication circuit, the master communication circuit being connected with the carrier communication cable to couple a communication signal to the carrier communication cable; the first power supply module comprising a first power supply output end, the first power supply output end being used to supply power to the carrier communication cable; the slave communication circuit obtaining power supply and the communication signal from the carrier communication cable; wherein the master communication circuit obtains power supply from the first power supply output end or from the carrier communication cable.

[0005] The communication device of the air conditioning system provided by the embodiment of the present application has at least the following beneficial effects: the master and the slave are connected through the carrier communication cable, and the transmission of the power supply and the communication signal can be simultaneously realized; the master communication circuit is connected with the carrier communication cable, and the communication signal can be coupled to the carrier communication cable; the slave communication circuit is connected with the carrier communication cable, and the communication signal from the master communication circuit can be obtained; the first power supply module outputs an independent power supply, and the first power output end is connected to the carrier communication cable, so that the power supply can be output to the carrier communication cable; the slave communication circuit is connected to the carrier communication line to obtain the power supply, and the slave does not need to design another power supply for the slave communication circuit, which is beneficial to simplify the communication structure of the air conditioning system; the master communication circuit can directly obtain the power supply from the first power output end or from the carrier communication cable, and the same power supply can realize the same reference ground of the multiple nodes in the air conditioning system, effectively simplifying the system design for suppressing common mode interference, making the multiple node communication structure simpler, and greatly reducing the cost.

[0006] In the communication device of the air conditioning system, the first capacitor module and the first inductor module are further included, the first power output end supplies power to the carrier communication cable through the third inductor module, and the master communication circuit obtains the power supply from the first power output end.

[0007] The first capacitor module can conduct the alternating current signal of the carrier communication cable, the master communication circuit outputs the communication signal and couples the communication signal into the carrier communication cable through the first capacitor module, the third inductor module can conduct the direct current signal of the carrier communication cable, the first power output end supplies power to the carrier communication cable through the third inductor module, the combination of the first capacitor module and the third inductor module can more easily realize the coupling of the alternating current signal and the direct current signal, so as to realize the mutual isolation of the communication and the power supply, and the multiplexing function of the carrier communication cable can be used to further simplify the circuit structure.

[0008] In the communication device of the air conditioning system, the first capacitor module includes a first capacitor and a second capacitor, the master communication circuit is connected to the carrier communication cable through the first capacitor and the second capacitor respectively, the third inductor module includes a fifth inductor and a sixth inductor, and the first power output end supplies power to the carrier communication cable through the fifth inductor and the sixth inductor.

[0009] The carrier communication cable includes a first cable and a second cable, and the communication signal and the power supply are transmitted through the two cables at the same time, balanced transmission and differential reception are adopted, the ability to suppress common mode interference is provided, the host communication circuit is connected to the first cable through a first capacitor and connected to the second cable through a second capacitor, the communication signal can be transmitted into the carrier communication cable, the first power output end supplies power to the first cable through a fifth inductor and supplies power to the second cable through a sixth inductor, the first capacitor and the fifth inductor are isolated from each other, and the second capacitor and the sixth inductor are isolated from each other, the transmission of the communication signal and the power supply does not affect each other, and the reliability and stability of the communication are beneficially ensured.

[0010] In the communication device of the air conditioning system, a first capacitor module, a first inductor module and a third inductor module are further included, the first power output end supplies power to the carrier communication cable through the third inductor module, the host communication circuit obtains power from the carrier communication cable through the first inductor module, and the host communication circuit couples the communication signal to the carrier communication cable through the first capacitor module.

[0011] The first capacitor module can conduct the alternating current signal of the carrier communication cable, the host communication circuit couples the communication signal into the carrier communication cable through the first capacitor module after outputting the communication signal, the first inductor module and the third inductor module can conduct the direct current signal of the carrier communication cable, the first power output end supplies power to the carrier communication cable through the third inductor module, the host communication circuit obtains power from the carrier communication cable through the first inductor module, the combination of the first capacitor module, the first inductor module and the third inductor module more easily realizes the coupling of the alternating current signal and the direct current signal, thereby realizing the mutual isolation of the communication and the power supply, and the multiplexing function of the carrier communication cable can further simplify the circuit structure.

[0012] In the communication device of the air conditioning system, the first capacitor module includes a first capacitor and a second capacitor, the host communication circuit is connected to the carrier communication cable through the first capacitor and the second capacitor respectively, the first inductor module includes a first inductor and a second inductor, the host communication circuit obtains power from the carrier communication cable through the first inductor and the second inductor, and the third inductor module includes a fifth inductor and a sixth inductor, the first power output end supplies power to the carrier communication cable through the fifth inductor and the sixth inductor.

[0013] The carrier communication cable includes a first cable and a second cable, the host communication circuit is connected to the first cable through a first capacitor and connected to the second cable through a second capacitor, and communication signals can be transmitted into the carrier communication cable, a first power output end supplies power to the first cable through a fifth inductor and supplies power to the second cable through a sixth inductor, the host communication circuit obtains power from the first cable through the first inductor and obtains power from the second cable through the second inductor, the first capacitor, the first inductor and the fifth inductor are mutually isolated, and the second capacitor, the second inductor and the sixth inductor are mutually isolated, the transmission of the communication signals and the power supply is not affected, and the reliability and stability of the communication are ensured.

[0014] In the communication device of the air conditioning system, a second capacitor module and a second inductor module are further included, and the slave communication circuit obtains the communication signals through the second capacitor module and obtains power through the second inductor module.

[0015] The second capacitor module is arranged to receive the alternating current signals of the carrier communication cable, the slave communication circuit obtains the communication signals from the host communication circuit through the second capacitor module, the second inductor module is arranged to receive the direct current signals of the carrier communication cable, and it can be understood that the slave communication circuit is a power receiving object and obtains power from the carrier communication cable through the second inductor module. The combination of the second capacitor module and the second inductor module makes it easier to obtain the alternating current signals and the direct current signals, thereby realizing the mutual isolation of the communication and the power supply, effectively utilizing the multiplexing function of the carrier communication cable, and further simplifying the circuit structure.

[0016] In the communication device of the air conditioning system, the second capacitor module includes a third capacitor and a fourth capacitor, the slave communication circuit is connected to the carrier communication cable through the third capacitor and the fourth capacitor respectively, the second inductor module includes a third inductor and a fourth inductor, and the slave communication circuit obtains power from the carrier communication cable through the third inductor and the fourth inductor.

[0017] The carrier communication cable includes a first cable and a second cable, the slave communication circuit is connected to the first cable through a third capacitor and connected to the second cable through a fourth capacitor, and communication signals can be obtained from the carrier communication cable, the slave communication circuit obtains power from the first cable through a third inductor and obtains power from the second cable through a fourth inductor, the third capacitor and the third inductor are mutually isolated, and the fourth capacitor and the fourth inductor are mutually isolated, the transmission of the communication signals and the power supply is not affected, and the reliability of the master-slave communication is improved.

[0018] In the communication device of the air conditioning system, the host communication circuit obtains power supply from the carrier communication cable, the host includes a host control circuit, the slave includes a slave control circuit, and the host control circuit and the slave control circuit obtain power supply from the carrier communication cable respectively.

[0019] By setting the host control circuit and the slave control circuit, the normal communication between the host and the slave can be controlled, and the reliability of the working of the host communication circuit and the slave communication circuit is ensured.

[0020] In the communication device of the air conditioning system, the host includes a host control circuit, the first isolation module is used for isolating the host control circuit and the host communication circuit, and the first power supply module further includes a second power supply output end.

[0021] The first power supply module is further provided with a second power supply output end, and the second power supply output end is independent of the first power supply output end. It can be understood that if the second power supply output end is used to supply power to the host control circuit, the first isolation module is arranged between the host control circuit and the host communication circuit, so that the control circuit and the communication circuit of the host are isolated, the influence of interference between different signals is avoided, and the safe and reliable communication is facilitated.

[0022] In the communication device of the air conditioning system, the host includes a host control circuit, the first isolation module is used for isolating the host control circuit and the host communication circuit, and the second power supply module is used for supplying power to the host control circuit and the original stage of the first isolation module.

[0023] The second power module is independent of the first power module, and can be understood as follows: if the second power module is additionally arranged to supply power to the host control circuit, the first isolation module is arranged between the host control circuit and the host communication circuit, so that the control circuit and the communication circuit of the host are isolated, interference between different signals is avoided, the safety and reliability of communication are facilitated, the output end of the second power module provides low-voltage power supply for the primary stage of the host control circuit and the first isolation module, the normal operation of the host control circuit is ensured, and damage of the high-voltage power supply to the first isolation module is avoided, and the service life of the air conditioning system is improved.

[0024] In the communication device of the air conditioning system, the slave machine includes a slave machine control circuit, and the slave machine control circuit obtains power supply from the carrier communication cable.

[0025] The slave machine control circuit is arranged, the reliability of the operation of the slave machine communication circuit is ensured, normal communication between the host and the slave machine is facilitated, the slave machine control circuit obtains power supply from the carrier communication cable, the slave machine does not need to design an additional power supply to supply power to the control circuit, the communication structure design is simplified, the cost is greatly reduced, the same power supply is obtained from the carrier communication cable, the reference ground of multiple nodes in the air conditioning system is the same, common-mode interference is effectively suppressed, and the reliability of communication is ensured.

[0026] In the communication device of the air conditioning system, a third power module and a second isolation module are further included, the slave machine includes a slave machine control circuit, the second isolation module is used for isolating the slave machine control circuit and the slave machine communication circuit, the output end of the third power module is used for supplying power to the primary stage of the slave machine control circuit and the second isolation module, and the secondary stage of the first isolation module obtains power supply from the carrier communication cable.

[0027] If the third power module is arranged on the slave machine side, the third power module supplies power to the slave machine control circuit, the second isolation module is arranged between the slave machine control circuit and the slave machine communication circuit, so that the control circuit and the communication circuit of the slave machine are isolated, interference between different signals is avoided, the safety and reliability of communication are facilitated, the third power module is arranged locally on the slave machine to provide low-voltage power supply for the primary stage of the slave machine control circuit and the second isolation module, the normal operation of the slave machine control circuit is ensured, and damage of the external high-voltage power supply to the second isolation module is avoided, and the service life of the air conditioning system is improved.

[0028] In the communication device of the air conditioning system, a first voltage reduction module is further included, and the host communication circuit obtains power supply from the first power supply output end through the first voltage reduction module or obtains power supply from the carrier communication cable through the first voltage reduction module.

[0029] It can be understood that the host communication circuit can directly obtain power supply from the first power output terminal or obtain power supply from the carrier communication cable. If the host communication circuit directly obtains power supply from the first power output terminal, the first power output terminal outputs high-voltage power supply, and the low-voltage power supply is outputted after being stepped down by the first voltage reduction module to supply power to the host communication circuit. If the host communication circuit obtains power supply from the carrier communication cable, the first power output terminal outputs high-voltage power supply, which is transmitted through the carrier communication cable and stepped down by the first voltage reduction module. The host communication circuit can obtain low-voltage working power supply from the carrier communication cable, which can ensure the normal working of the host communication circuit and is conducive to improving the overall service life of the air conditioning system.

[0030] In the communication device of the air conditioning system, a second voltage reduction module is further included, and the slave communication circuit obtains power supply from the carrier communication cable through the second voltage reduction module.

[0031] The second voltage reduction module is connected with the carrier communication cable. The first power output terminal outputs high-voltage power supply, which is transmitted through the carrier communication cable and outputted as low-voltage power supply after being stepped down by the second voltage reduction module. The slave communication circuit is supplied with power through the output terminal of the second voltage reduction module. The voltage is reduced through the second voltage reduction module, which can provide appropriate working power supply for the slave communication circuit, ensure the normal working of the slave communication circuit, and be conducive to improving the overall service life of the air conditioning system.

[0032] In the communication device of the air conditioning system, the host control circuit includes a host micro control unit, the host micro control unit is connected with the primary side of the first isolation module, and the secondary side of the first isolation module is connected with the host communication circuit.

[0033] The primary side of the first isolation module is connected with the host micro control unit, and the secondary side of the first isolation module is connected with the host communication circuit, which can realize the isolation of the host control circuit and the host communication circuit and avoid the mutual influence of the host control circuit and the host communication circuit. It can be understood that if one side of the host control circuit or the host communication circuit is disturbed by the outside world, the other side will not be affected, which can ensure the normal transmission of the control signal and the communication signal. The host micro control unit is connected with the host communication circuit through the first isolation module. The host micro control unit sends a control signal, which enters the host communication circuit for signal conversion after passing through the first isolation module. The host communication circuit outputs a communication signal to the carrier communication cable, thereby realizing the normal communication between the host and the slave, and being conducive to ensuring the reliability of the communication.

[0034] In the communication device of the air conditioning system, the slave control circuit includes a slave micro control unit, the slave micro control unit is connected with the primary side of the second isolation module, and the secondary side of the second isolation module is connected with the slave communication circuit.

[0035] The primary connection of the second isolation module is connected to the slave micro control unit, and the secondary connection of the second isolation module is connected to the slave communication circuit, so that the slave control circuit and the slave communication circuit can be isolated, and the slave control circuit and the slave communication circuit can be prevented from affecting each other. It can be understood that if one side of the slave control circuit or the slave communication circuit is disturbed by the outside world, the other side will not be affected, so that the normal transmission of the control signal and the communication signal can be ensured. The slave micro control unit is connected to the slave communication circuit through the second isolation module. After the slave communication circuit obtains the communication signal, the communication signal enters the slave micro control unit for signal conversion through the second isolation module, and the control signal is output by the slave micro control unit, so that various function controls of the slave can be realized, and the working stability of the slave can be ensured.

[0036] In a second aspect, the embodiment of the present application provides an air conditioning system, which comprises the communication device as described in the first aspect.

[0037] The air conditioning system provided by the embodiment of the present application has at least the following beneficial effects: the air conditioning system comprises a master, at least one slave and a communication device. The master and the slave are connected through a carrier communication cable, so that the transmission of the power supply and the communication signal can be realized at the same time. The communication device comprises a master communication circuit, a first power supply module and a slave communication circuit. The master communication circuit is connected to the carrier communication cable, so that the communication signal can be coupled to the carrier communication cable. The slave communication circuit is connected to the carrier communication cable, so that the communication signal from the master communication circuit can be obtained. The first power supply module outputs an independent power supply, which is connected to the carrier communication cable through a first power output end, so that the power supply can be output to the carrier communication cable. The slave communication circuit is connected to the carrier communication line to obtain the power supply. The slave does not need to design an additional power supply for the slave communication circuit, so that the communication structure of the air conditioning system can be simplified. The master communication circuit can directly obtain the power supply from the first power output end or from the carrier communication cable. The same power supply can realize the same reference ground of the multiple nodes in the air conditioning system, so that the system design for suppressing common mode interference can be effectively simplified, the multiple node communication structure can be more simple, and the cost can be greatly reduced.

[0038] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0039] The present application will be further described below in conjunction with the drawings and examples.

[0040] Figure 1is a structural schematic view of a communication device of an air conditioning system provided by an embodiment one of the present application;

[0041] Figure 2 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment two of the present application;

[0042] Figure 3 is a connection relationship schematic view of an air conditioning system provided by an embodiment three of the present application;

[0043] Figure 4 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment four of the present application;

[0044] Figure 5 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment five of the present application;

[0045] Figure 6 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment six of the present application;

[0046] Figure 7 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment seven of the present application;

[0047] Figure 8 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment eight of the present application;

[0048] Figure 9 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment nine of the present application;

[0049] Figure 10 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment ten of the present application;

[0050] Figure 11 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment eleven of the present application;

[0051] Figure 12 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment twelve of the present application;

[0052] Figure 13 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment thirteen of the present application;

[0053] Figure 14 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment fourteen of the present application;

[0054] Figure 15 is a structural schematic view of a communication device of an air conditioning system provided by an embodiment fifteen of the present application;

[0055] Figure 16is a structural schematic view of a communication device of an air conditioning system provided by Embodiment Sixteen of the present application;

[0056] Figure 17 is a schematic view of a connection relationship of an air conditioning system provided by Embodiment Seventeen of the present application. DETAILED DESCRIPTION

[0057] This part will describe the specific embodiments of the present application in detail, and the preferred embodiments of the present application are shown in the accompanying drawings, which serve to supplement the description in the text part of the specification, so that one can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0058] In the description of the embodiments of the present application, one or more is meant to be one or more, two or more is meant to be two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number, "at least one" means one or more, "at least one of the following" and the like means any combination of these items, including single item or multiple item combination. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0059] It should be noted that the terms such as setting, installing, connecting, etc. in the embodiments of the present application should be understood broadly, and the person skilled in the art can reasonably determine the specific meaning of the above terms in the embodiments of the present application in combination with the specific content of the technical scheme. For example, the term "connection" can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium.

[0060] In the description of the embodiments of the present application, the description of the reference terms "one embodiment", "another embodiment" or "some embodiments", "in the above embodiment" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are contained in at least two embodiments or embodiments of the present disclosure. In the present disclosure, the illustrative description of the above terms does not necessarily refer to the same example or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0061] It should be noted that the technical features involved in each of the embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0062] In the related art, since the multi-connected air conditioning system belongs to a multi-split system, the master and slave machines need to form a communication network for communication, and the current communication network is mainly wired communication, which needs a dedicated communication cable as a communication channel. When performing multi-node and long-distance communication, common mode interference suppression processing is needed.

[0063] To solve the above problems, the conventional processing scheme currently adopted is:

[0064] Local isolation: the node designs an independent power supply for the communication circuit, and uses an isolation device for isolation.

[0065] The local isolation scheme needs to design an independent power supply for each node, which is high in cost and complex in circuit.

[0066] No isolation: the power supply ground of all nodes is connected by a separate physical connection line.

[0067] The no isolation scheme needs a physical connection line to connect each node in the system to a common ground, which is difficult to install and high in cost.

[0068] Based on the above situation, the embodiment of the present application provides a communication device of an air conditioning system and an air conditioning system, which is beneficial to simplify the communication structure of the air conditioning system and greatly reduce the cost.

[0069] In order to facilitate understanding, first, the terms involved in the embodiment of the present application are explained as follows:

[0070] Master: specifically refers to the outdoor unit for the air conditioning system.

[0071] Slave: refers to the indoor unit or other non-outdoor unit equipment of the air conditioning system, which is used for data interaction with the master.

[0072] Communication channel: specifically refers to the physical connection line connecting the nodes in the system.

[0073] Carrier communication: specifically refers to a communication technology that simultaneously realizes power supply and communication signal transmission for the air conditioning system.

[0074] The embodiment of the present application will be further described below with reference to the accompanying drawings.

[0075] Reference Figures 1 to 3, the air conditioning system has an outdoor unit and multiple indoor units, the outdoor unit and the indoor units are connected with each other through a carrier communication cable 110, if there is only one outdoor unit in the air conditioning system, the outdoor unit is defined as a master, and the indoor units 1 to N are defined as slaves, the communication device of the air conditioning system in the embodiment of the application is applicable to a multi-split air conditioning system, but is not limited to the multi-split air conditioning system, and is also applicable to a single-split air conditioning system, it should be noted that the number N of the slave is determined by the refrigeration demand of the air conditioning system, and the embodiment of the application does not make specific limitation. The embodiment of the first aspect of the application provides a communication device of an air conditioning system, the air conditioning system includes a master and at least one slave, the master and the slave are connected with each other through a carrier communication cable 110, the communication device includes a master communication circuit 120, a first power supply module 140, and a slave communication circuit 130, the master communication circuit 120 is connected with the carrier communication cable 110 to couple a communication signal to the carrier communication cable 110; the first power supply module 140 includes a first power supply output end 141, the first power supply output end 141 is used for power supply to the carrier communication cable 110; the slave communication circuit 130 obtains power supply and a communication signal from the carrier communication cable 110; wherein the master communication circuit 120 obtains power supply from the first power supply output end 141 or from the carrier communication cable 110.

[0076] As shown in Figure 1 and Figure 2 , the communication device of the air conditioning system provided by the above-mentioned first aspect embodiment, the master and the slave are connected together through the carrier communication cable 110, and the transmission of the power supply and the communication signal can be realized at the same time, wherein, Figure 1 a scheme in which the master communication circuit 120 obtains power supply from the first power supply output end 141 is shown, Figure 2 a scheme in which the master communication circuit 120 obtains power supply from the carrier communication cable 110 is shown, by connecting the master communication circuit 120 to the carrier communication cable 110, the communication signal can be coupled to the carrier communication cable 110, the slave communication circuit 130 is connected with the carrier communication cable 110 to obtain the communication signal from the master communication circuit 120, the first power supply module 140 outputs an independent power supply, and is connected to the carrier communication cable 110 through the first power supply output end 141 to output the power supply to the carrier communication cable 110, the slave communication circuit 130 is connected to the carrier communication line to obtain the power supply, and the slave does not need to design an additional power supply for the slave communication circuit 130, which is beneficial to simplify the communication structure of the air conditioning system, the master communication circuit 120 can directly obtain the power supply from the first power supply output end 141 or from the carrier communication cable 110, the same power supply can realize the same reference ground of multiple nodes in the air conditioning system, effectively simplifies the system design of common-mode interference suppression, makes the multiple node communication structure more simple, and greatly reduces the cost.

[0077] It should be noted that the first power module 140 can be an external power supply or a host power supply, and the power supply voltage of the first power output end 141 is determined according to the size of the air conditioning system. If the number of nodes is more and the distance is farther, the power supply voltage can be appropriately increased, and the number of slave machines and the communication distance are set to appropriate power supply, which is conducive to improving the stability and reliability of power supply.

[0078] Specifically, as shown in Figure 1 and Figure 2 , the same power supply is used to realize the common ground of the multiple nodes of the air conditioning system, so that all nodes are connected together or the slave machines are designed with an isolated power supply. The slave communication circuit 130 can obtain power from the carrier communication cable 110 to realize the common ground effect of the host communication circuit 120, which is conducive to establishing reliable and stable communication between the host communication circuit 120 and the slave communication circuit 130.

[0079] It can be understood that when the host and the slave machine form a communication network, the first power output end 141 is connected to the carrier communication cable 110 to supply power to the carrier communication cable 110. The host communication circuit 120 can obtain power from the carrier communication cable 110 to make the host communication circuit 120 powered on. The slave communication circuit 130 can obtain power by connecting the slave communication circuit 130 to the carrier communication cable 110. The host communication circuit 120 and the slave communication circuit 130 form a communication channel through the carrier communication cable 110, so that the data interaction between the host and the slave machine can be realized. The carrier communication cable 110 simultaneously realizes the transmission of power supply and communication signal, which can reduce the wiring installation cost and is conducive to simplifying the communication structure of the air conditioning system.

[0080] As shown in Figure 4 , in the communication device of the above air conditioning system, the first capacitor module 150 and the third inductor module 270 are further included. The first power output end 141 supplies power to the carrier communication cable 110 through the third inductor module 270. The host communication circuit 120 obtains power from the first power output end 141. The host communication circuit 120 couples the communication signal to the carrier communication cable 110 through the first capacitor module 150.

[0081] By setting the first capacitor module 150, the AC signal of the carrier communication cable 110 can be conducted, and after the host communication circuit 120 outputs the communication signal, the first capacitor module 150 is coupled into the carrier communication cable 110. By setting the third inductor module 270, the DC signal of the carrier communication cable 110 can be conducted, and the first power output end 141 supplies power to the carrier communication cable 110 through the third inductor module 270. Through the combination of the first capacitor module 150 and the third inductor module 270, the coupling of AC signals and DC signals is more easily realized, thereby realizing the mutual isolation of communication and power supply, and further simplifying the circuit structure by utilizing the multiplexing function of the carrier communication cable 110. Specifically, Figure 4 The scheme of the host communication circuit 120 obtaining power from the first power output end 141 is shown, and the first power output end 141 outputs power in two ways, one of which supplies power to the host communication circuit 120, and the other of which supplies power to the carrier communication cable 110 through the third inductor module 270.

[0082] As shown in the communication device of the air conditioning system, Figure 4 The first capacitor module 150 includes a first capacitor C1 and a second capacitor C2, and the host communication circuit is connected to the carrier communication cable 110 through the first capacitor C1 and the second capacitor C2, respectively. The third inductor module 270 includes a fifth inductor L5 and a sixth inductor L6, and the first power output end 141 supplies power to the carrier communication cable through the fifth inductor L5 and the sixth inductor L6.

[0083] The carrier communication cable 110 includes a first cable 111 and a second cable 112, and transmits communication signals and power through two cables at the same time, adopts balanced transmission and differential reception, and has the ability to suppress common-mode interference. The host communication circuit 120 is connected to the first cable 111 through the first capacitor C1 and to the second cable 112 through the second capacitor C2, and can realize transmission of communication signals into the carrier communication cable 110. The first power output end 141 supplies power to the first cable 111 through the fifth inductor L5 and to the second cable 112 through the sixth inductor L6. The communication signal and the power supply are mutually isolated by the first capacitor C1 and the fifth inductor L5, and by the second capacitor C2 and the sixth inductor L6, and the transmission of the communication signal and the power supply does not affect each other, which is conducive to ensuring the reliability and stability of communication.

[0084] As shown in the communication device of the air conditioning system, Figure 5As shown, in the communication device of the air conditioning system, the first capacitor module 150, the first inductor module 160 and the third inductor module 270 are further included, the first power output end 141 supplies power to the carrier communication cable 110 through the third inductor module 270, the host communication circuit 120 obtains power from the carrier communication cable 110 through the first inductor module 160, and the host communication circuit 120 couples the communication signal to the carrier communication cable 110 through the first capacitor module 150.

[0085] By setting the first capacitor module 150, the alternating current signal of the carrier communication cable 110 can be conducted, and after the host communication circuit 120 outputs the communication signal, the communication signal is coupled into the carrier communication cable 110 through the first capacitor module 150. By setting the first inductor module 160 and the third inductor module 270, the direct current signal of the carrier communication cable 110 can be conducted, the first power output end 141 supplies power to the carrier communication cable 110 through the third inductor module 270, the host communication circuit 120 obtains power from the carrier communication cable 110 through the first inductor module 160, and the combination of the first capacitor module 150, the first inductor module 160 and the third inductor module 270 more easily realizes the coupling of alternating current signals and direct current signals, thereby realizing the mutual isolation of communication and power supply, and further simplifying the circuit structure by using the multiplexing function of the carrier communication cable 110. Specifically, Figure 5 The scheme of the host communication circuit 120 obtaining power from the carrier communication cable 110 is shown, the first power output end 141 supplies power to the carrier communication cable 110 through the third inductor module 270, and the host communication circuit 120 obtains power from the carrier communication cable 110 through the first inductor module 160.

[0086] In the communication device of the air conditioning system, the first capacitor module 150 includes a first capacitor C1 and a second capacitor C2, the host communication circuit 120 is connected to the carrier communication cable 110 through the first capacitor C1 and the second capacitor C2 respectively, the first inductor module 160 includes a first inductor L1 and a second inductor L2, the host communication circuit 120 obtains power from the carrier communication cable 110 through the first inductor L1 and the second inductor L2, and the third inductor module 270 includes a fifth inductor L5 and a sixth inductor L6, the first power output end 141 supplies power to the carrier communication cable 110 through the fifth inductor L5 and the sixth inductor L6.

[0087] The carrier communication cable 110 comprises a first cable 111 and a second cable 112, the host communication circuit 120 is connected to the first cable 111 through a first capacitor C1 and connected to the second cable 112 through a second capacitor C2, so that the communication signal can be transmitted into the carrier communication cable, the first power output end 141 supplies power to the first cable 111 through a fifth inductor L5, the host communication circuit 120 obtains power from the first cable 111 through a first inductor L1, and the first power output end 141 supplies power to the second cable 112 through a sixth inductor L6, the host communication circuit 120 obtains power from the second cable 112 through a second inductor L2, the first capacitor C1, the first inductor L1 and the fifth inductor L5 are mutually isolated, and the second capacitor C2, the second inductor L2 and the sixth inductor L6 are mutually isolated, the transmission of the communication signal and the power supply is not affected, which is conducive to ensuring the reliability and stability of the communication.

[0088] It should be noted that the host communication circuit 120 and the slave communication circuit 130 comprise RS485 transceivers, the power supply and the communication are ingeniously isolated by using the RS485 carrier communication mechanism, the carrier communication cable 110 is composed of a twisted pair and has a shielding layer as a ground wire outside, the differential transmission mode is used, the anti-common-mode interference capability is possessed, the devices of the host communication circuit 120 and the slave communication circuit 130 are connected to the same reference ground through a signal loop, the noise of the carrier communication cable 110 can be effectively reduced, and the normal and reliable communication signal transmission is ensured.

[0089] As shown in Figure 4 and Figure 5 In the communication device of the air conditioning system, a second capacitor module 170 and a second inductor module 180 are further arranged, it should be noted that the second capacitor module 170 can conduct the alternating current signal, so that the communication signal can be transmitted through the carrier communication cable 110, the slave communication circuit 130 can receive the communication signal from the host communication circuit 120 through the second capacitor module 170, the second inductor module 180 can conduct the direct current signal, so that the slave communication circuit 130 can receive the direct current signal of the carrier communication cable 110, it can be understood that in the communication device of the embodiment of the application, the slave communication circuit 130 is a power receiving object, can obtain the power supply from the first power output end 141 through the second inductor module 180, through the combination of the second capacitor module 170 and the second inductor module 180, the alternating current signal and the direct current signal are more easily obtained, so that the mutual isolation of the communication and the power supply can be realized, the multiplexing function of the carrier communication cable 110 can be effectively utilized, so that the circuit structure can be further simplified.

[0090] As shown in Figure 4 and Figure 5As shown, in the communication device of the air conditioning system, the second inductance module 180 includes a third inductance L3 and a fourth inductance L4, the carrier communication cable 110 includes a first cable 111 and a second cable 112, and the embodiment of the application ingeniously utilizes the capacitor and the inductance to realize mutual isolation of the communication signal and the power supply, the third capacitor C3 is connected with the slave communication circuit 130 and the first cable 111 respectively, the fourth capacitor C4 is connected with the slave communication circuit 130 and the second cable 112 respectively, the second capacitor module 170 can be set to realize the communication signal obtained from the carrier communication cable 110, the third inductance L3 is connected with the slave communication circuit 130 and the first cable 111 respectively to enable the slave communication circuit 130 to be powered from the first cable 111, the fourth inductance L4 is connected with the slave communication circuit 130 and the second cable 112 respectively to enable the slave communication circuit 130 to be powered from the second cable 112, the third capacitor C3 and the third inductance L3 are mutually isolated, and the fourth capacitor C4 and the fourth inductance L4 are mutually isolated, the transmission of the communication signal and the power supply does not interfere with each other, and the reliability of the master-slave communication is improved.

[0091] It should be noted that the first inductance module 160, the second inductance module 180 and the third inductance module 270 have the same structure and can isolate the communication signal transmitted in the carrier communication cable 110.

[0092] The master communication circuit 120 and the slave communication circuit 130 are both provided with an RS485 transceiver, and it can be understood that the master communication circuit 120 and the slave communication circuit 130 can both realize the sending and receiving of the communication signal, thereby realizing the data interaction between the master and the slave, and it should be noted that in addition to the communication interaction mode mentioned in the above embodiment that the master communication circuit 120 sends the communication signal and transmits it to the carrier communication cable 110 to enable the slave communication circuit 130 to obtain the communication signal, the slave communication circuit 130 can also send the communication signal and transmit it to the carrier communication cable 110 to enable the master communication circuit 120 to obtain the communication signal, and the specific communication process will be introduced below, the slave communication circuit 130 sends the communication signal and couples the communication signal to the first cable 111 through the third capacitor C3, the master communication circuit 120 can obtain the communication signal through the first capacitor C1, in addition, the slave communication circuit 130 couples the communication signal to the second cable 112 through the fourth capacitor C4, and the master communication circuit 120 obtains the communication signal from the second cable 112 through the second capacitor C2, and the communication interaction between the master and the slave is realized through the RS485 transceiver, which can make the communication more reliable and safer.

[0093] As Figure 6As shown, in the communication device of the above-mentioned air conditioning system, the host communication circuit 120 obtains power from the carrier communication cable 110. The host includes a host control circuit 190, and the slave includes a slave control circuit 200. The host control circuit 190 and the slave control circuit 200 respectively obtain power from the carrier communication cable 110.

[0094] By setting up a master control circuit 190 and a slave control circuit 200, normal communication between the master and slave can be controlled, ensuring the reliability of the master communication circuit 120 and the slave communication circuit 130. Both the master control circuit 190 and the slave control circuit 200 draw power from the carrier communication cable 110. The master and slave do not need to design an additional power supply for the control circuits, which greatly reduces the design cost of the communication structure. By drawing power from the same source as the carrier communication cable 110, multiple nodes within the air conditioning system can share the same reference ground, effectively suppressing common-mode interference and ensuring communication reliability. Specifically, by uniformly supplying power to the carrier communication cable 110 from the first power module 140, the master control circuit 190, master communication circuit 120, slave communication circuit 130, and slave control circuit 200 all draw power from the carrier communication cable 110, making their corresponding reference grounds all GND. This achieves the effect of suppressing common-mode interference, eliminating the need for a separate power supply for the communication and control circuits, and also eliminating the need for isolation devices, thus simplifying the communication structure of the air conditioning system.

[0095] like Figure 7 or Figure 8 or Figure 11 or Figure 12 As shown, the communication device of the above-mentioned air conditioning system also includes a first isolation module 210, the host includes a host control circuit 190, the first isolation module 210 is used to isolate the host control circuit 190 and the host communication circuit 120, and the first power module 140 also includes a second power output terminal 142, which is used to supply power to the host control circuit 190 and the primary winding of the first isolation module 210.

[0096] The first power module 140 is further provided with a second power output end 142, which is independent of the first power output end 141. It can be understood that, if the second power output end 142 is arranged to supply power to the host control circuit 190, the first isolation module 210 is arranged between the host control circuit 190 and the host communication circuit 120, so that the control circuit and the communication circuit of the host can be isolated, interference between different signals is avoided, the safety and reliability of communication are facilitated, the working voltage required by the host control circuit 190 and the first isolation module 210 is usually lower than the power frequency voltage, the output voltage of the second power output end 142 is lower than that of the first power output end 141, low-voltage power supply is provided for the primary stage of the host control circuit 190 and the first isolation module 210 through the second power output end 142, the normal work of the host control circuit 190 is ensured, and damage of the high-voltage power supply to the first isolation module 210 is avoided, which is beneficial to improve the service life of the air conditioning system.

[0097] As shown in Figure 9 or Figure 10 or Figure 13 or Figure 14 In the communication device of the above air conditioning system, a second power module 220 and a first isolation module 210 are further included, the host includes a host control circuit 190, the first isolation module 210 is used for isolating the host control circuit 190 and the host communication circuit 120, and an output end of the second power module 220 is used for supplying power to the primary stage of the host control circuit 190 and the first isolation module 210.

[0098] The second power module 220 is independent of the first power module 140. It can be understood that, if the second power module 220 is additionally arranged to supply power to the host control circuit 190, the first isolation module 210 is arranged between the host control circuit 190 and the host communication circuit 120, so that the control circuit and the communication circuit of the host can be isolated, interference between different signals is avoided, the safety and reliability of communication are facilitated, the output end of the second power module 220 provides low-voltage power supply for the primary stage of the host control circuit 190 and the first isolation module 210, the normal work of the host control circuit 190 is ensured, and damage of the high-voltage power supply to the first isolation module 210 is avoided, which is beneficial to improve the service life of the air conditioning system. It should be noted that the second power module 220 can be a host power supply, which can provide suitable working power supply for the host control circuit 190 and the first isolation module 210.

[0099] As shown in Figures 7 to 10 In the communication device of the above air conditioning system, the slave machine includes a slave control circuit 200, and the slave control circuit 200 obtains power supply from the carrier communication cable 110.

[0100] By setting the slave control circuit 200, the reliability of the slave communication circuit 130 can be ensured, and the normal communication between the master and the slave can be facilitated. The slave control circuit 200 obtains power supply from the carrier communication cable 110, and the slave does not need to design an additional power supply for the control circuit, which is conducive to simplifying the communication structure design, thereby greatly reducing the cost. By obtaining the same power supply from the carrier communication cable 110, the reference ground of the multiple nodes in the air conditioning system can be the same, the common mode interference can be effectively suppressed, and the reliability of the communication can be ensured.

[0101] As shown in Figures 11 to 14 the communication device of the air conditioning system further includes a third power module 230 and a second isolation module 240. The slave includes a slave control circuit 200, and the second isolation module 240 is used to isolate the slave control circuit 200 and the slave communication circuit 130. The output end of the third power module 230 is used to supply power to the primary stage of the slave control circuit 200 and the second isolation module 240. The secondary stage of the first isolation module 210 obtains power supply from the carrier communication cable 110.

[0102] If the third power module 230 is provided on the slave side, the third power module 230 supplies power to the slave control circuit 200. The second isolation module 240 is provided between the slave control circuit 200 and the slave communication circuit 130, so that the control circuit and the communication circuit of the slave can be isolated, the influence of interference between different signals can be avoided, the safe and reliable communication can be facilitated, and the use life of the air conditioning system can be improved. It should be noted that the third power module 230 can be a slave power supply, which can provide suitable working power supply for the slave control circuit 200 and the second isolation module 240.

[0103] It should be noted that by setting the first isolation module 210, the control circuit and the communication circuit of the master can be isolated. By setting the second isolation module 240, the control circuit and the communication circuit of the slave can be isolated. The normal operation of the control end and the reliable communication of the communication circuit can be effectively ensured, so that the air conditioning system can stably and normally operate. At the same time, the control circuit of the master / slave and the carrier communication cable 110 are isolated from each other, so that various common mode interferences caused by ground potential difference, ground loop, etc. can be effectively suppressed. The carrier communication cable 110 can still realize the normal transmission of communication signals under the influence of other external environments.

[0104] It should be noted that the first isolation module 210 and the second isolation module 240 have the same structure, including isolation devices such as optocoupler isolation chips or digital isolation chips. Different isolation devices can be selected according to the requirements of the communication circuit, thereby achieving reliable isolation between the control circuit and the communication circuit.

[0105] like Figures 6 to 14 As shown, the communication device of the above-mentioned air conditioning system is also provided with a first step-down module 250. The host communication circuit 120 obtains power from the first power output terminal 141 through the first step-down module 250, or obtains power from the carrier communication cable 110 through the first step-down module 250.

[0106] It is understandable that the host communication circuit 120 can obtain power directly from the first power output terminal 141 or from the carrier communication cable 110, such as Figure 8 , Figure 10 , Figure 12 and Figure 14 As shown, if the host communication circuit 120 directly obtains power from the first power output terminal 141, the first power output terminal 141 outputs high-voltage power. This high-voltage power is then stepped down by the first step-down module 250, outputting low-voltage power to supply power to the host communication circuit 120. The first power output terminal 141, on the one hand, transmits the high-voltage power to the carrier communication cable 110. High-voltage transmission reduces the current during transmission, thereby reducing heat loss due to current and lowering the material cost of long-distance transmission, effectively reducing energy loss in the transmission line. On the other hand, after being stepped down by the first step-down module 250, it supplies power to the host communication circuit 120. It should be noted that if the host control circuit 190 obtains power from an independent power source, a first isolation module 210 is required to isolate the host control circuit 190 and the host communication circuit 120. The power output from the first power output terminal 141, after being stepped down by the first step-down module 250, supplies power to the host communication circuit 120 and the secondary winding of the first isolation module 210 respectively. Figure 6 , Figure 7 , Figure 9 , Figure 11 and Figure 13As shown, if the host communication circuit 120 obtains power supply from the carrier communication cable 110, the first power output end 141 outputs high-voltage power supply, which is transmitted through the carrier communication cable 110 and is reduced in voltage by the first voltage reduction module 250. The host communication circuit 120 can obtain low-voltage working power supply from the carrier communication cable 110, which can ensure the normal working of the host communication circuit 120 and is conducive to improving the overall service life of the air conditioning system. If the host control circuit 190 obtains power supply from the carrier communication cable 110, the host communication circuit 120 and the host control circuit 190 obtain power supply reduced by the first voltage reduction module 250. If the host control circuit 190 is powered by an independent power supply, the host communication circuit 120 and the secondary of the first isolation module 210 obtain power supply reduced by the first voltage reduction module 250, which can ensure the normal working state.

[0107] As shown in the communication device of the air conditioning system, Figures 6 to 14 the communication device further comprises a second voltage reduction module 260. The slave communication circuit 130 obtains power supply from the carrier communication cable 110 through the second voltage reduction module 260.

[0108] The second voltage reduction module 260 is connected with the carrier communication cable 110. The first power output end 141 outputs high-voltage power supply, which is transmitted through the carrier communication cable 110 and is outputted as low-voltage power supply after being reduced in voltage by the second voltage reduction module 260. The second voltage reduction module 260 outputs low-voltage power supply for the slave communication circuit 130. The voltage is reduced by the second voltage reduction module 260, which can provide appropriate working power supply for the slave communication circuit 130, can ensure the normal working of the slave communication circuit 130, and is conducive to improving the overall service life of the air conditioning system.

[0109] It should be noted that, as shown in the communication device of the air conditioning system, Figures 6 to 10 if the slave control circuit 200 obtains power supply from the carrier communication cable 110, the slave communication circuit 130 and the slave control circuit 200 obtain power supply reduced by the second voltage reduction module 260, as shown in the communication device of the air conditioning system, Figures 11 to 14 if the slave control circuit 200 obtains power supply from an independent power supply, the second isolation module 240 needs to be set to isolate the slave control circuit 200 and the slave communication circuit 130. The slave communication circuit 130 and the secondary of the second isolation module 240 obtain power supply reduced by the second voltage reduction module 260.

[0110] It should be noted that the first voltage reduction module 250 and the second voltage reduction module 260 can adopt an integrated voltage reduction device of the prior art. Those skilled in the art can select different voltage reduction devices according to actual needs.

[0111] In the communication device of the air conditioning system, the host control circuit 190 is provided with a host micro control unit MCU1, the host micro control unit MCU1 is connected with the primary side of the first isolation module 210, and the secondary side of the first isolation module 210 is connected with the host communication circuit 120.

[0112] As shown in Figure 15 , the primary side of the first isolation module 210 is connected with the host micro control unit MCU1, and the secondary side of the first isolation module 210 is connected with the host communication circuit 120, so that the isolation of the host control circuit 190 and the host communication circuit 120 can be realized, and the mutual influence of the host control circuit 190 and the host communication circuit 120 can be avoided. It can be understood that if one side of the host control circuit 190 or the host communication circuit 120 is interfered by the outside, the other side will not be affected, so that the normal transmission of the control signal and the communication signal can be ensured. The host micro control unit MCU1 is connected with the host communication circuit 120 through the first isolation module 210, the host micro control unit MCU1 sends the control signal, the control signal enters the host communication circuit 120 for signal conversion after passing through the first isolation module 210, the host communication circuit 120 outputs the communication signal to the carrier communication cable 110, so that the normal communication between the host and the slave can be realized, and the reliability of the communication can be ensured. It should be noted that Figure 15 one specific embodiment is shown, but is not limited to this embodiment, and those skilled in the art can refer to the scheme of Figures 7 to 14 to deform the structure.

[0113] In the communication device of the air conditioning system, the slave control circuit 200 includes a slave micro control unit MCU2, the slave micro control unit MCU2 is connected with the primary side of the second isolation module 240, and the secondary side of the second isolation module 240 is connected with the slave communication circuit 130.

[0114] As shown in Figure 15As shown, the primary connection of the second isolation module 240 is connected to the slave micro control unit MCU2, and the secondary connection of the second isolation module 240 is connected to the slave communication circuit 130, so as to realize the mutual isolation between the slave control circuit 200 and the slave communication circuit 130, avoid the mutual influence between the slave control circuit 200 and the slave communication circuit 130, and it can be understood that if one side of the slave control circuit 200 or the slave communication circuit 130 is disturbed by the outside world, the other side will not be affected, so as to ensure the normal transmission of the control signal and the communication signal. The slave micro control unit MCU2 is connected to the slave communication circuit 130 through the second isolation module 240, the communication signal is obtained by the slave communication circuit 130, and then the communication signal is input into the slave micro control unit MCU2 through the second isolation module 240 for signal conversion. The control signal is output by the slave micro control unit MCU2, so as to realize the control of various functions of the slave, and the working stability of the slave is ensured. Figure 15 The specific embodiment is shown in the figure, but is not limited to this embodiment, and those skilled in the art can refer to the scheme of Figures 11 to 14 for structural transformation.

[0115] As shown in Figure 16 , it should be noted that the host communication circuit 120 and the slave communication circuit 130 are both provided with RS485 transceivers, and it should be noted that the RS485 transceiver is provided with built-in on-off keying (OOK) modulation and demodulation function, which can realize power transmission and data communication by modulating data on the existing power line, and can greatly reduce the cost of the communication system by sharing a pair of common carrier communication cable 110. Specifically, when the host communication circuit 120 obtains the input control signal, the on-off keying of the RS485 transceiver is modulated and processed to form a communication signal, and the communication signal is transmitted to the carrier communication cable 110 through the sending end. When the slave communication circuit 130 receives the corresponding communication signal, the on-off keying of the RS485 transceiver is demodulated and processed to form a control signal, so as to realize the control of the host to the slave, for example, the slave can be controlled to adjust the air temperature, humidity and other parameters, or the communication between the host and the slave. It can be understood that the slave communication circuit 130 can send a communication signal to the host communication circuit 120, so as to realize the data interaction between the host and the slave. Specifically, the RS485 transceiver selects the THVD8000 model transceiver, the THVD8000 integrates the modulation and demodulation circuit and the bus I / O protection, can increase the frequency content of the baseband data being transmitted, can more easily realize direct current and alternating current coupling, does not need special coding in the microcontroller, has good working performance, and it should be noted that the model of the RS485 transceiver is not limited in the embodiment of the application, and those skilled in the art can select according to the actual needs.

[0116] It should be noted that the master micro control unit MCU1 and the slave micro control unit MCU2 can be a common master control chip, which can include a memory and a processor, the processor can be a central processing unit (CPU), or a digital processing unit (DSP) and the like, the memory is used for storing the program executed by the processor, and the memory can be any medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but is not limited thereto.

[0117] As shown in Figure 1 , Figure 4 and Figure 16 , it should be noted that the first power output end 141 of the host side of the embodiment of the application supplies power to the carrier communication cable 110 through the third inductance module 270, and the slave side can be powered through the second inductance module 180, and after the voltage reduction processing of the second voltage reduction module 260, the slave communication circuit 130 and the secondary of the second isolation module 240 can be powered, and at the same time, the first power output end 141 outputs power to the host communication circuit 120 and the secondary of the first isolation module 210 after the voltage reduction processing of the first voltage reduction module 250, and through the same power supply output, the corresponding reference ground of the host communication circuit 120 and the slave communication circuit 130 is GND, and it can be understood that if the air conditioning system includes multiple slaves, the other slave nodes are sequentially deduced, and the reference ground of all slaves is GND, thereby realizing the effect of suppressing common mode interference. It should be noted that Figure 16 one specific embodiment is shown, but it is not limited to this embodiment, and those skilled in the art can deform the structure according to the actual situation.

[0118] The RS485 transceiver of the embodiment of the application adopts balanced transmission and differential reception, has the ability to suppress common mode interference, is suitable for multi-node and long-distance communication structure, and through the isolation module and the communication transceiver, a new multi-node communication isolation system structure is formed, which greatly simplifies the system design, ensures that it is not affected in a complex electromagnetic interference environment, and guarantees the reliability and safety of communication.

[0119] The embodiment of the second aspect of the application provides an air conditioning system, which includes the communication device of the first aspect of the above embodiment.

[0120] The air conditioning system provided by the second aspect embodiment comprises a host, at least one slave and a communication device. The host and the slave are connected to each other through a carrier communication cable 110, and the transmission of the power supply and the communication signal can be realized at the same time. The communication device is provided with a host communication circuit 120, a first power supply module 140 and a slave communication circuit 130. The host communication circuit 120 is connected to the carrier communication cable 110, so that the communication signal can be coupled to the carrier communication cable 110. The slave communication circuit 130 is connected to the carrier communication cable 110, so that the communication signal from the host communication circuit 120 can be obtained. The first power supply module 140 outputs an independent power supply, which is connected to the carrier communication cable 110 through a first power supply output end 141, so that the power supply can be output to the carrier communication cable 110. The slave communication circuit 130 is connected to the carrier communication line to obtain the power supply. The slave does not need to design an additional power supply for the slave communication circuit 130, which is beneficial to simplify the communication structure of the air conditioning system. The host communication circuit 120 can directly obtain the power supply from the first power supply output end 141 or obtain the power supply from the carrier communication cable 110. The same power supply can realize the same reference ground of the multiple nodes in the air conditioning system, effectively simplify the system design for suppressing common mode interference, make the multiple node communication structure more simple, and greatly reduce the cost.

[0121] It should be noted that the structure of the communication device can be arranged in the host or the slave, or the communication device is an independent integrated device, which is connected to the host and the slave through an interface. The embodiments of the present application do not make specific limitations.

[0122] As shown in Figure 17 Specifically, the air conditioning system further comprises a wire controller, which is a control terminal of the slave and can realize the parameter control of the slave. The wire controller is a man-machine interface, which is used for inputting the control parameters by the user, such as the on-off setting, temperature setting, wind speed setting, timing, sleep setting and the like. The communication mode between the wire controller and the slave can be power line carrier communication or communication through a CAN bus, an RS485 bus or an HBS bus. The embodiments of the present application do not make specific limitations, and the person skilled in the art can select different communication modes according to the actual use scene.

[0123] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above-mentioned embodiments. The person skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are included in the scope defined by the claims of the present application.

Claims

1. A communication device for an air conditioning system, characterized in that, The air conditioning system includes a main unit and at least one slave unit, the main unit and the slave unit are connected via a carrier communication cable, and the communication device includes: First capacitor module; Third inductor module; A host communication circuit is connected to the carrier communication cable to couple communication signals to the carrier communication cable; The first power module includes a first power output terminal, which is used to supply power to the carrier communication cable. The slave communication circuit obtains power and the communication signal from the carrier communication cable; The first power output terminal supplies power to the carrier communication cable through the third inductor module. The host communication circuit obtains power from the first power output terminal. The host communication circuit couples the communication signal to the carrier communication cable through the first capacitor module, or the host communication circuit obtains power from the carrier communication cable.

2. The communication device according to claim 1, characterized in that, The first capacitor module includes a first capacitor and a second capacitor. The host communication circuit is connected to the carrier communication cable through the first capacitor and the second capacitor, respectively. The third inductor module includes a fifth inductor and a sixth inductor. The first power output terminal supplies power to the carrier communication cable through the fifth inductor and the sixth inductor.

3. The communication device according to claim 1, characterized in that, It also includes a first capacitor module, a first inductor module, and a third inductor module. The first power output terminal supplies power to the carrier communication cable through the third inductor module. The host communication circuit obtains power from the carrier communication cable through the first inductor module. The host communication circuit couples communication signals to the carrier communication cable through the first capacitor module.

4. The communication device according to claim 3, characterized in that, The first capacitor module includes a first capacitor and a second capacitor. The host communication circuit is connected to the carrier communication cable through the first capacitor and the second capacitor, respectively. The first inductor module includes a first inductor and a second inductor. The host communication circuit obtains power from the carrier communication cable through the first inductor and the second inductor. The third inductor module includes a fifth inductor and a sixth inductor. The first power output terminal supplies power to the carrier communication cable through the fifth inductor and the sixth inductor.

5. The communication device according to claim 1, characterized in that, It also includes a second capacitor module and a second inductor module. The slave communication circuit obtains the communication signal through the second capacitor module and obtains power through the second inductor module.

6. The communication device according to claim 5, characterized in that, The second capacitor module includes a third capacitor and a fourth capacitor. The slave communication circuit is connected to the carrier communication cable through the third capacitor and the fourth capacitor, respectively. The second inductor module includes a third inductor and a fourth inductor. The slave communication circuit obtains power from the carrier communication cable through the third inductor and the fourth inductor.

7. The communication device according to claim 1, characterized in that, The host communication circuit obtains power from the carrier communication cable. The host includes a host control circuit, and the slave includes a slave control circuit. The host control circuit and the slave control circuit obtain power from the carrier communication cable, respectively.

8. The communication device according to claim 1, characterized in that, It also includes a first isolation module. The host includes a host control circuit. The first isolation module is used to isolate the host control circuit and the host communication circuit. The first power module also includes a second power output terminal. The second power output terminal is used to supply power to the host control circuit and the primary winding of the first isolation module.

9. The communication device according to claim 1, characterized in that, It also includes a second power module and a first isolation module. The host includes a host control circuit. The first isolation module is used to isolate the host control circuit and the host communication circuit. The output terminal of the second power module is used to supply power to the host control circuit and the primary winding of the first isolation module.

10. The communication device according to claim 8 or 9, characterized in that, The slave device includes a slave control circuit, which obtains power from the carrier communication cable.

11. The communication device according to claim 8 or 9, characterized in that, It also includes a third power supply module and a second isolation module. The slave device includes a slave control circuit. The second isolation module is used to isolate the slave control circuit and the slave communication circuit. The output of the third power supply module is used to supply power to the slave control circuit and the primary winding of the second isolation module. The secondary winding of the first isolation module obtains power from the carrier communication cable.

12. The communication device according to claim 1, characterized in that, It also includes a first step-down module, through which the host communication circuit obtains power from the first power output terminal, or from the carrier communication cable.

13. The communication device according to claim 1, characterized in that, It also includes a second step-down module, through which the slave communication circuit obtains power from the carrier communication cable.

14. The communication device according to claim 8 or 9, characterized in that, The host control circuit includes a host microcontroller unit, which is connected to the primary winding of the first isolation module, and the secondary winding of the first isolation module is connected to the host communication circuit.

15. The communication device according to claim 11, characterized in that, The slave control circuit includes a slave microcontroller unit, which is connected to the primary winding of the second isolation module, and the secondary winding of the second isolation module is connected to the slave communication circuit.

16. An air conditioning system, characterized in that, It includes the communication device as described in any one of claims 1 to 15.

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