CN110440391B - Loop network protection method and air conditioning system - Google Patents
Loop network protection method and air conditioning system Download PDFInfo
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- CN110440391B CN110440391B CN201910726769.4A CN201910726769A CN110440391B CN 110440391 B CN110440391 B CN 110440391B CN 201910726769 A CN201910726769 A CN 201910726769A CN 110440391 B CN110440391 B CN 110440391B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 156
- 238000001514 detection method Methods 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 2
- 239000013307 optical fiber Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a loop network protection method and an air conditioning system. The loop network protection method comprises the following steps: sequentially connecting all nodes into a loop network for communication along a first direction through a main communication channel; connecting the nodes into a loop network along a second direction opposite to the first direction through a standby communication channel; when communication faults occur among nodes, all or part of standby communication channels among the nodes are started to carry out communication protection switching to form at least one loop network for communication. The invention can realize a long communication network with high error correction efficiency.
Description
Technical Field
The present invention relates to a loop network protection method and an air conditioning system using the same.
Background
Communication is an indispensable technical means in modern society, and in many fields, all devices need to be interconnected to work, for example, in the air conditioning industry, interconnected air conditioning units are air conditioning systems which are widely applied at present. The interconnection communication also becomes the direction of subsequent air conditioner information exchange. With the future development, the performance of components such as an air conditioner is improved, and the communication performance of the components is also improved. For the air conditioning system, the communication is stable, the communication distance is long, the communication speed is high, and the information interaction among the air conditioners of each unit in a large space can be guaranteed. Therefore, how to provide a loop network protection method to realize such guarantee is a technical problem to be solved urgently in the industry.
Disclosure of Invention
In order to solve the technical problem of how to provide a loop network protection method with stable communication in the prior art, a loop network protection method and an air conditioning system are provided.
The loop network protection method of the invention comprises the following steps:
sequentially connecting all nodes into a loop network for communication along a first direction through a main communication channel;
connecting the nodes into a loop network along a second direction opposite to the first direction through a standby communication channel;
when communication faults occur among nodes, all or part of standby communication channels among the nodes are started to carry out communication protection switching to form at least one loop network for communication.
Specifically, when a failure occurs in a main communication channel between nodes and all the standby communication channels are normal, all the nodes start a loop network formed by the standby communication channels to perform communication.
Specifically, when a standby communication channel between two nodes fails and a main communication channel between the two nodes is normal, the two nodes record corresponding failure information.
Specifically, when both the main communication channel and the standby communication channel between the nodes have faults, the number of the node segments in which both the main communication channel and the standby communication channel are normal is judged, and each segment of the node starts the standby communication channel and forms a loop network together with the main communication channel between the node segments to perform communication.
Preferably, the main communication channel and the standby communication channel adopt optical fiber interfaces.
Specifically, whether communication fault occurs in two nodes is judged, and the method specifically includes:
the adjacent nodes respectively send corresponding detection messages through the main communication channel and the standby communication channel in each detection period;
the adjacent nodes judge whether communication faults occur between the two nodes by acquiring the results of the failure of sending or receiving the corresponding detection messages.
Preferably, when a communication fault occurs between two nodes, after the two nodes send fault information to the loop network through the main communication channel and/or the standby communication channel, the whole or part of the nodes perform the communication protection switching operation again.
Specifically, the node is an air conditioning unit. When some nodes in the system have functional faults, the fault nodes send fault information to other nodes through the main communication channel and/or the standby communication channel, and the other nodes adjust power according to the fault information to maintain the total output of the loop network.
Specifically, the fault information includes an ID of the faulty node, a fault type, and fault detail information.
The air conditioning system provided by the invention comprises a plurality of air conditioning connecting units, and the air conditioning units are used as each node of a loop network to execute the loop network protection method in the technical scheme.
The invention can realize a long-distance communication system, has high fault tolerance rate for communication faults, can enable the system to carry out long-distance communication in a loop network form under the condition that various communication faults are sudden, and can carry out adjustment in time through other high-speed nodes of the loop network when a certain air conditioner in the system has a fault sending function, thereby ensuring the output of the whole air conditioning system.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a schematic diagram of a connection according to an embodiment of the present invention.
FIG. 2 is a flow chart of an adjustment process according to an embodiment of the present invention.
Detailed Description
The principles and embodiments of the present invention are described in detail below with reference to the accompanying drawings.
The present invention is described by taking an air conditioning system composed of a plurality of air conditioning units as an example, as shown in fig. 1, the air conditioning system has 5 air conditioning units, which are respectively: air conditioner 1, air conditioner 2, air conditioner 3, air conditioner 4, air conditioner 5. Each air conditioning unit is provided with a main receiving interface, a main sending interface, a standby receiving interface and a standby sending interface. In this embodiment, the main transmitting interface and the main receiving interface, and the standby receiving interface and the standby transmitting interface are all optical fiber interfaces, so that the main transmitting interface and the standby transmitting interface between the air conditioners 1 and 5 are connected through the main optical fiber, and the standby transmitting interface and the standby receiving interface between the air conditioners 1 and 5 are connected through the standby optical fiber, so that the communication speed is high, and the fault of the corresponding interfaces can be detected by transmitting corresponding messages.
The 5 air conditioning units can be connected among the air conditioning units through the main receiving and transmitting interfaces to form a main communication channel, and the 5 air conditioning units are connected through the main communication channel to form a loop network along the clockwise direction. The 5 air conditioning units can also be connected between the air conditioning units through the standby receiving and sending interfaces to form a standby communication channel, and the 5 air conditioning units are connected through the standby communication channel to form a loop network along the counterclockwise direction, namely the air conditioning units are used as nodes in the two loop networks, and the receiving and sending directions of the standby receiving and sending interfaces are opposite to the receiving and sending directions of the main receiving and sending interfaces. As shown in fig. 2, in a normal situation, the 5 air conditioning units are sequentially connected through the main communication channel to form a loop network for communication, and during normal communication, the data flow of the current loop network is 1- >2- >3- >4- >5- > 1. When communication fault occurs between two nodes, namely the main communication channel is in fault, the two nodes inform other nodes through the main communication channel and/or the standby communication channel, and then communication protection switching is carried out by starting standby transceiving interfaces of all or part of the nodes to form at least one loop network for communication.
In the embodiment of the invention, corresponding detection messages are respectively sent between two nodes through a main communication channel and a standby communication channel in each detection period; the two nodes judge whether communication faults occur or not by acquiring the results of the failure of sending or receiving the corresponding detection messages. For example, when the air conditioner 1 sends the detection message to the primary interface of the air conditioner 2 through the primary interface, the air conditioner 1 is the source node at this time, and the air conditioner 2 is the sink node. And when the air conditioner 2 sends the detection message to the standby receiving interface of the air conditioner 1 through the standby sending interface, the air conditioner 1 is the sink node at the moment, and the air conditioner 2 is the source node. When the air conditioner 2 is a sink node and does not receive the detection message within a predetermined time, the air conditioner 2 may know that either the primary sending interface of the air conditioner 1 has a fault or the primary receiving interface of the air conditioner 2 has a fault, and the primary sending interface of the air conditioner 1 may also know that the primary sending interface of the air conditioner 1 has a fault because the primary sending interface does not receive the corresponding optical signal, that is, in any case, as long as the corresponding sink node (the air conditioner 2) does not receive the corresponding detection message, it may be determined that the primary communication channel between the air conditioner 1 and the air conditioner 2 has a fault. Similarly, if the air conditioner 1 is used as a sink node and the detection message sent by the air conditioner 2 is not received, the air conditioner 1 and the air conditioner 2 can determine that the standby communication channel between the air conditioner 1 and the air conditioner 2 has a fault.
Three examples are described below to illustrate the case of communication failure and the specific communication protection switching measures.
In the first example, we assume that single air conditioner communication fails. The communication fault occurs at the main transmission interface of the air conditioner 2 (i.e. in the transmission direction of the air conditioner 2 towards the air conditioner 3), i.e. the main communication channel between the air conditioner 2 and the air conditioner 3 has a fault, and the other communication channels are normal, the air conditioner 2 and the air conditioner 3 can inform the fault information corresponding to the other nodes (the air conditioner 1, the air conditioner 4 and the air conditioner 5) through the other normal main communication channels and/or the standby communication channel, and the fault information specifically may include a fault air conditioner ID, a fault type (whether a communication fault or a functional fault), fault detailed information, and the like. All the nodes know that the main communication channel between the air conditioner 2 and the air conditioner 3 has a problem, the air conditioners 1 to 5 adopt communication protection switching to be completely switched to the standby communication channel, the data flow direction from the air conditioners 1 to 5 is completely opposite to the original direction, counterclockwise communication is shown in the figure, the data flow direction is 2- >1- >5- >4- >3- >2, and the light loop normally passes. If the main communication channels between all the air conditioners are normal and some spare communication channels between some air conditioners have faults, the air conditioners do no protection action at the moment, but the information is recorded, for example, if the spare communication channels between the air conditioners 1 and 2 have faults, the air conditioners 1 and 2 record corresponding fault information.
In a second example, if multiple air conditioner communications fail. For example, a communication fault occurs at a main transmitting interface of the air conditioner 2, a communication fault occurs at a main receiving interface of the air conditioner 5, and similarly, all nodes also perform the same communication protection switching action, no matter how many main communication channels of the air conditioners fail, the main communication channels are switched to the standby communication channel, and the data flow direction is 2- >1- >5- >4- >3- > 2.
In the third example, when communication disconnection of one or more air conditioners is failed. For example, after the main receiving and sending interface and the standby receiving and sending interface of the air conditioner 2 all have faults, that is, the main communication channel and the standby communication channel between the air conditioner 2 and the air conditioner 1 have faults, the main communication channel and the standby communication channel between the air conditioner 2 and the air conditioner 3 also have faults, the air conditioner 2 is separated from the loop network, at this time, the air conditioner 1 and the air conditioner 3 send fault information to the loop network through the main communication channel and/or the standby communication channel with other nodes, so that other air conditioner nodes all know that the corresponding main communication channel and the standby communication channel of the air conditioner 2 have faults, at this time, the number of the node segments which judge that the main communication channel and the standby communication channel are normal is 1 segment, that is, the air conditioner 3, the air conditioner 4, the air conditioner 5 to the air conditioner 1, each segment of the node starts the standby communication channel and the main communication channel between the standby communication channel to form a, the data flow at this time is 3- >4- >5- >1- >5- >4- > 3. If a plurality of air conditioners are separated from the loop network, the number of the node sections with normal main communication channels and normal standby communication channels is also judged, and then corresponding operation is carried out, for example, the air conditioners 1 and 2 are separated from the loop network due to corresponding faults, the number of the node sections with normal main communication channels and normal standby communication channels is still 1, the air conditioners 3 to 5 start the main communication channels and the standby communication channels between the air conditioners to form a new loop network for communication, and the data flow direction is 3- >4- >5- >4- > 3. When there are 6 air conditioners, namely air conditioner 1 to air conditioner 6, if the air conditioner 2 and the air conditioner 5 are separated from the loop network due to a communication fault at the same time, the number of the node sections where the main communication channel and the standby communication channel are normal is 2, namely, the air conditioner 3 and the air conditioner 4 are one section, and the air conditioner 1 and the air conditioner 6 are one section, at this time, the data flow direction is 3- >4- >3, 6- >1- > 6.
After a node fault occurs in the loop network, the node reports corresponding fault information to a user, so that maintenance personnel can repair the fault air conditioner in time and restore the original loop network. The network protection method of the invention can realize a communication network with high fault tolerance rate and ensure the operation of the system.
When the air conditioner set in the loop network has a functional fault, the fault air conditioner immediately sends fault information to the loop network through the main communication channel and/or the standby communication channel, and after the air conditioners of other nodes receive the fault information, the power can be adjusted according to the fault information to maintain the total output of the whole loop network. For example, when other nodes receive faults such as cooling (heating), air supply and the like, the power consumption born by the corresponding air conditioning unit is obtained, then the power consumption required to be shared by the other nodes is calculated, so that the power required to be adjusted is calculated, the increased power is obtained when the effects of normal cooling (heating), air supply and the like are achieved under the condition that the system is not overloaded, and the load is intelligently adjusted. And meanwhile, reporting the ID of the fault air conditioner of the user and informing related maintenance personnel to repair the fault air conditioner.
The invention can realize the open circuit protection of the message channel by arranging the loop network, each air conditioner can realize self regulation according to the open circuit message, and each air conditioner can regulate the corresponding temperature (wind power) under the same refrigeration (heating) effect, thereby achieving the effect before the air conditioner fails. So that the use of the client is not influenced in a short time, and the client loss is caused. And form the communication channel of loop network through optic fibre, accepted the characteristics of optical transmission, stable, rapid, long distance, can carry out the halo communication protection simultaneously, ensured air conditioner communication, made the product function more stable. Of course, the present invention can be applied to other systems requiring long distance communication besides the air conditioning system.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A loop network protection method is characterized by comprising the following steps:
sequentially connecting all nodes into a loop network for communication along a first direction through a main communication channel;
connecting the nodes into a loop network along a second direction opposite to the first direction through a standby communication channel;
when communication faults occur among the nodes, all or part of standby communication channels among the nodes are started to carry out communication protection switching to form at least one loop network for communication;
when the main communication channels between the nodes have faults and all the standby communication channels are normal, all the nodes start a loop network formed by the standby communication channels to carry out communication;
when the main communication channel and the standby communication channel between the nodes have faults, the number of the node sections with the normal main communication channel and the normal standby communication channel is judged, and each section of the node starts the standby communication channel and forms a loop network together with the main communication channel between the nodes for communication.
2. The method for protecting a loop network of claim 1, wherein when the backup communication path between two nodes fails and the primary communication path between two nodes is normal, the two nodes record corresponding failure information.
3. The method of claim 1, wherein the primary communication path and the backup communication path employ fiber optic interfaces.
4. The method for protecting a loop network according to claim 1, wherein the determining whether a communication failure occurs between the nodes specifically comprises:
the adjacent nodes respectively send corresponding detection messages through the main communication channel and the standby communication channel in each detection period;
and the adjacent nodes judge whether the communication fault occurs or not by acquiring the result of the failure of sending or receiving the corresponding detection message.
5. The method according to claim 1, wherein when a communication failure occurs between two nodes, after the two nodes send failure information to the ring network through the main communication channel and/or the backup communication channel, the whole or a part of the nodes perform the communication protection switching operation.
6. The loop network protection method according to any one of claims 1 to 5, wherein the node is an air conditioning unit.
7. The method for protecting a ring network according to claim 6, wherein when a node in the system has a functional failure, the failed node sends failure information to other nodes through the primary communication channel and/or the backup communication channel, and the other nodes adjust power according to the failure information to maintain the total output of the ring network.
8. An air conditioning system comprising a plurality of air conditioning units, wherein the air conditioning units perform the loop network protection method according to any one of claims 1 to 7 as nodes of a loop network.
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| CN201910726769.4A CN110440391B (en) | 2019-08-07 | 2019-08-07 | Loop network protection method and air conditioning system |
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| CN111413895B (en) * | 2020-03-13 | 2023-05-16 | 上海外高桥造船有限公司 | Marine emergency cut-off network system and network reconstruction method using same |
| CN116232465B (en) * | 2023-05-04 | 2023-07-25 | 艾乐德电子（南京）有限公司 | System and method for realizing multi-machine parallel operation redundancy by optical fiber annular communication |
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