CN113048615A

CN113048615A - Air conditioning system, communication control method and device thereof, storage medium and processor

Info

Publication number: CN113048615A
Application number: CN202110334864.7A
Authority: CN
Inventors: 刘智荣; 杨华生; 邹宏亮; 李志逢; 陈维旭
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-06-29
Anticipated expiration: 2041-03-29
Also published as: CN113048615B

Abstract

The invention discloses a communication control method and device of an air conditioning system, the air conditioning system, a storage medium and a processor, wherein the method comprises the following steps: after a current internal machine of more than two internal machines is electrified, the current internal machine is enabled to determine whether a wired controller is on a bus or not; if the bus is provided with the wired controller, the current internal machine is switched from the upper computer to the lower computer under the condition that the current internal machine is the upper computer in front of the current internal machine; under the condition that the current indoor unit is a lower computer before the current indoor unit, the current indoor unit continues to be the lower computer; if no wire controller is arranged on the bus, the current internal machine is switched to the upper computer, so that the current internal machine is used as the upper computer to control the communication between other internal machines in the more than two internal machines. According to the scheme, when the fact that the wire controller does not exist in the bus network is determined, an internal machine is determined and the internal machine is switched to the upper computer, and communication interaction among other internal machines is achieved.

Description

Air conditioning system, communication control method and device thereof, storage medium and processor

Technical Field

The invention belongs to the technical field of air conditioning systems, and particularly relates to a communication control method and device of an air conditioning system, the air conditioning system, a storage medium and a processor, and particularly relates to a master-slave node switching method and device of the air conditioning system, the storage medium and the processor.

Background

With the development of science and the continuous progress of society, central air-conditioning is increasingly popularized, and public places such as markets, office buildings, hospitals and the like are more and more favored to install the central air-conditioning, especially in occasions such as meeting rooms and rooms with wide areas and large areas, a plurality of internal machines are required to be installed to meet the requirement of cooling capacity, and are controlled by a series networking on a control method.

Commercial air pipe internal unit need match the line controller and control the use, and the line controller is as the host computer, initiatively launches the data roll call in communication network to realize the communication interaction between each node on the bus network. And the lamp plate has on commercial courtyard machine's the panel, and the supporting remote controller of generally uses, can allow not having on the bus network that line controller inserts, under this condition, can't carry out the communication interaction between a plurality of interior machines.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention aims to provide a communication control method and device of an air conditioning system, the air conditioning system, a storage medium and a processor, which aim to solve the problem that in the air conditioning system for controlling a plurality of internal machines through a host computer, when no wire controller exists on a bus network as the host computer, the communication interaction among the internal machines cannot be carried out, and achieve the effect of realizing the communication interaction among other internal machines by determining one internal machine and switching the internal machine into the host computer when the wire controller does not exist on the bus network.

The invention provides a communication control method of an air conditioning system, wherein the air conditioning system comprises the following steps: more than two internal machines; each of the more than two internal machines is connected to the bus; the communication control method of the air conditioning system comprises the following steps: after a current internal machine of the more than two internal machines is electrified, enabling the current internal machine to determine whether a wired controller is arranged on the bus or not; if the bus is provided with the wire controller, the current inner machine is switched from the upper computer to the lower computer under the condition that the current inner machine is the upper computer in front of the current inner machine; under the condition that the current indoor unit is a lower computer before the current indoor unit, the current indoor unit is continuously a lower computer; and if no wire controller is arranged on the bus, the current internal machine is switched to an upper computer, so that the current internal machine is used as the upper computer to control the communication between other internal machines in the more than two internal machines.

In some embodiments, determining whether a wired director is on the bus comprises: determining whether there is power on the bus; if the bus is powered on, determining whether the power on the bus is supplied by the current internal machine; if the electricity on the bus is supplied by the current internal machine, acquiring the current on the bus detected by a current detection module and recording the current as the bus current; and determining whether a wired controller is arranged on the bus or not according to the bus current.

In some embodiments, determining whether a wired controller is on the bus further comprises at least one of: if the bus is free of electricity, under the condition that more than two internal machines supply electricity to the bus in a competitive power supply mode and the bus is powered on, re-determining whether the electricity on the bus is supplied by the current internal machine; and if the electricity on the bus is not supplied by the current internal machine, re-determining whether the bus is provided with a wired controller.

In some embodiments, determining whether there is power on the bus comprises: acquiring the voltage on the bus detected by the voltage detection module, and recording the voltage as the bus voltage; if the bus voltage reaches a set voltage, determining that the bus is electrified; and if the bus voltage does not reach the set voltage, determining that no electricity exists on the bus.

In some embodiments, determining whether a wired slave is on the bus based on the bus current includes: if the bus current is smaller than a first set current, determining a wireless controller on the bus; and if the bus current is greater than or equal to a first set current and less than or equal to a second set current, determining that a wired controller is arranged on the bus.

In some embodiments, the communication control method of an air conditioning system further includes: if the bus current is larger than the second set current, executing a preset overcurrent protection action; wherein, carry out predetermined overcurrent protection action, include: disconnecting the power supply line of the wired controller under the condition that the wired controller is arranged on the bus; meanwhile, under the condition that the current indoor unit is a lower computer before the current indoor unit, the current indoor unit is continuously a lower computer; or under the condition that the current inner machine is an upper computer in front of the current inner machine, the current inner machine is switched to a lower computer from the upper computer.

In another aspect, the present invention provides a communication control device for an air conditioning system, where the air conditioning system includes: more than two internal machines; each of the more than two internal machines is connected to the bus; the communication control device of the air conditioning system comprises: the determining unit is configured to enable a current inner machine of the more than two inner machines to determine whether a wired controller is arranged on the bus or not after the current inner machine is powered on; the control unit is configured to enable the current inner machine to be switched from an upper computer to a lower computer under the condition that the current inner machine is the upper computer before the current inner machine if a wire controller is arranged on the bus; under the condition that the current indoor unit is a lower computer before the current indoor unit, the current indoor unit is continuously a lower computer; the control unit is also configured to enable the current internal machine to be switched into an upper computer if no wire controller is arranged on the bus, so that the current internal machine can be used as the upper computer to control other internal machines in the more than two internal machines to communicate.

In some embodiments, the determining unit, determining whether a wired master is on the bus, includes: determining whether there is power on the bus; if the bus is powered on, determining whether the power on the bus is supplied by the current internal machine; if the electricity on the bus is supplied by the current internal machine, acquiring the current on the bus detected by a current detection module and recording the current as the bus current; and determining whether a wired controller is arranged on the bus or not according to the bus current.

In some embodiments, the determining unit, determining whether a wired controller is on the bus, further comprises at least one of: if the bus is free of electricity, under the condition that more than two internal machines supply electricity to the bus in a competitive power supply mode and the bus is powered on, re-determining whether the electricity on the bus is supplied by the current internal machine; and if the electricity on the bus is not supplied by the current internal machine, re-determining whether the bus is provided with a wired controller.

In some embodiments, the determining unit, determining whether there is power on the bus, includes: acquiring the voltage on the bus detected by the voltage detection module, and recording the voltage as the bus voltage; if the bus voltage reaches a set voltage, determining that the bus is electrified; and if the bus voltage does not reach the set voltage, determining that no electricity exists on the bus.

In some embodiments, the determining unit, determining whether a wired controller is on the bus according to the bus current, includes: if the bus current is smaller than a first set current, determining a wireless controller on the bus; and if the bus current is greater than or equal to a first set current and less than or equal to a second set current, determining that a wired controller is arranged on the bus.

In some embodiments, the communication control device of the air conditioning system further includes: the control unit is further configured to execute a preset overcurrent protection action if the bus current is greater than the second set current; wherein, carry out predetermined overcurrent protection action, include: disconnecting the power supply line of the wired controller under the condition that the wired controller is arranged on the bus; meanwhile, under the condition that the current indoor unit is a lower computer before the current indoor unit, the current indoor unit is continuously a lower computer; or under the condition that the current inner machine is an upper computer in front of the current inner machine, the current inner machine is switched to a lower computer from the upper computer.

In accordance with another aspect of the present invention, there is provided an air conditioning system including: the communication control device of the air conditioning system is described above.

In accordance with the above method, a further aspect of the present invention provides a storage medium, where the storage medium includes a stored program, and when the program runs, the device where the storage medium is located is controlled to execute the above communication control method for an air conditioning system.

In accordance with the above method, a further aspect of the present invention provides a processor for executing a program, wherein the program executes the above communication control method of the air conditioning system.

Therefore, in the air conditioning system which controls the plurality of internal machines through the upper computer, the power supplied to the bus network by the plurality of internal machines is utilized to judge whether the wire controller exists on the bus network, so that when the wire controller does not exist on the bus network, one internal machine is determined from the plurality of internal machines, the internal machine is switched to the upper computer, and the role of the upper computer is executed; therefore, when it is determined that the wire controller does not exist on the bus network, an internal machine is determined and switched into an upper computer, and communication interaction among other internal machines is realized.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a flowchart illustrating a communication control method of an air conditioning system according to an embodiment of the present invention;

FIG. 2 is a flow chart illustrating one embodiment of determining whether a wired director is on the bus in the method of the present invention;

FIG. 3 is a flow chart illustrating one embodiment of determining whether power is present on the bus in the method of the present invention;

FIG. 4 is a schematic structural diagram illustrating an embodiment of a communication control device of an air conditioning system according to the present invention;

FIG. 5 is a schematic diagram of an embodiment of a multi-split air conditioning system;

FIG. 6 is a schematic structural diagram of an embodiment of a power supply control circuit of a line controller;

fig. 7 is a schematic diagram illustrating an indoor unit determining process according to an embodiment of the air conditioning system.

The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:

102-a determination unit; 104-control unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

According to an embodiment of the present invention, a communication control method of an air conditioning system is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The air conditioning system includes: more than two internal machines. Each of the more than two internal machines is connected to the bus. Each of the more than two internal machines is connected to the bus through a corresponding interface respectively, so that the serial connection networking is realized through the bus. For example: and a plurality of internal units (such as the internal unit 1, the internal unit 2, the internal unit 3, the internal unit … and the internal unit N, wherein N is a positive integer) are connected to the network of the same bus in parallel. The air conditioning system can be a multi-split system, and can also be a system formed by serially connecting and networking a plurality of independent air conditioners through buses. The communication control method of the air conditioning system comprises the following steps: step S110 to step S130.

In step S110, after a current one of the two or more internal machines is powered on, the current internal machine itself determines whether a wired controller is on the bus. Namely, whether the bus is provided with a wired controller or not is determined by the controller of the current internal machine.

In some embodiments, referring to the schematic flowchart of an embodiment of determining whether a wired controller is on the bus in the method of the present invention shown in fig. 2, a specific process of determining whether a wired controller is on the bus in step S110 is further described, which includes: step S210 to step S240.

Step S210, determining whether there is electricity on the bus, for example, whether there is electricity on the bus is determined by the controller of the current internal machine itself. Wherein, the current internal machine means: among the powered-on internal machines of the more than two internal machines, one internal machine currently performs communication control.

In some embodiments, a specific process of determining whether there is electricity on the bus in step S210 is further described with reference to a flowchart of an embodiment of determining whether there is electricity on the bus in the method of the present invention shown in fig. 3, including: step S310 to step S330.

Step S310, acquiring the voltage on the bus detected by the voltage detection module, and recording the voltage as the bus voltage. That is, the voltage on the bus detected by a voltage detection module, such as a voltage sensor, is acquired by the controller of the present internal machine itself. It is then determined whether the bus voltage reaches a set voltage, which may be a voltage greater than 0V.

Step S320, if the bus voltage reaches a set voltage, determining that there is electricity on the bus.

Step S330, if the bus voltage does not reach the set voltage, determining that there is no power on the bus.

Specifically, under the condition that the internal machines are connected in series and are networked, only one internal machine is allowed to control the external power supply VCC1 to be conveyed to the bus, and the internal machines can supply power in a competitive mode by default to determine that one internal machine supplies power to the bus. After each internal machine in the internal machines is electrified, each internal machine detects the power supply condition of the bus loop, when the bus is detected to have no voltage, competitive power supply judgment is started, and one internal machine is determined from the internal machines to control the external power supply VCC1 to be transmitted to the bus.

And judging whether the bus has the voltage or not according to the detection result of the bus voltage. If the bus has voltage, whether the internal machine executes power supply is judged under the condition that the bus has voltage. If the bus has no voltage, the power supply is competitively carried out, and then whether the internal machine executes the power supply is judged under the condition that the bus has the voltage. Wherein, the competitive power supply may refer to: the plurality of internal units respectively generate a random number, then count down is carried out based on the random number, and the internal unit supplies power to the bus when the timing number of the random number generated by which internal unit arrives first.

Step S220, if there is electricity on the bus, determining whether the electricity on the bus is supplied by the current internal machine, and if so, determining whether the electricity on the bus is supplied by the current internal machine by a controller of the current internal machine. Wherein determining whether power on the bus is supplied by the current inner machine comprises: whether the current inner machine, namely the inner machine performs power supply or not, can be judged according to a power supply mark when the inner machine supplies power to the bus, and if the inner machine supplies power to the bus, the power supply performed by the inner machine is determined under the condition that the bus has voltage.

In step S230, if the power on the bus is supplied by the current internal machine, the current on the bus detected by the current detection module is obtained and recorded as the bus current. That is, the current on the bus detected by a current detection module, such as a current sensor, is acquired by the controller of the present internal machine itself.

Step S240, determining whether there is a wired controller on the bus according to the bus current, for example, determining whether there is a wired controller on the bus by the controller of the current internal machine.

Specifically, because the power supplied by the internal machine to the bus is used for supplying power to the line controller, the influence of fluctuation of the line controller on the bus current when the power is obtained (for example, whether the line controller exists on the bus can be determined when the current value of the bus is in different intervals) is utilized to quickly judge whether the line controller exists on the bus network, and if the wireless controller determines that one internal machine is switched to the role of the upper computer at random.

In some embodiments, determining whether a wired slave is on the bus based on the bus current includes any of the following:

the first determination case: and if the bus current is less than a first set current (such as the first set current of the detected current value of the bus), determining that the wireless controller is on the bus.

Specifically, under the condition that the internal machine performs power supply, the internal machine performing output power supply (i.e., the internal machine) is enabled to further detect the bus current, i.e., detect the current condition of the bus loop, and detect the relationship between the current value of the bus and the first set current, wherein the value of the first set current is related to the hardware load circuit of the line controller, and is used for indicating the current state of the line controller in normal operation. When the current value of the bus is detected to be smaller than the first set current, no wire controller is connected to the bus.

Second determination case: and if the bus current is greater than or equal to a first set current and less than or equal to a second set current (such as the second set current of the detected current value of the bus), determining that the wired controller is on the bus.

Specifically, under the condition that the internal unit executes power supply, the internal unit executing output power supply (namely the internal unit) is enabled to further detect bus current, namely the current condition of a bus loop, and when the current value of the bus is detected to be greater than or equal to a first set current, the relationship between the current value of the bus and a second set current is further detected, the value of the second set current is related to the carrying capacity of the bus circuit and is used for setting a bus overcurrent value, wherein the first set current is smaller than the second set current. When the current value of the bus is detected to be between the first set current and the second set current, the fact that the line controller is connected to the bus is indicated.

In some embodiments, the step S110 of determining whether the bus is a wired controller further includes a control process of at least one of:

the first control process: if the bus is free of electricity, under the condition that more than two internal machines supply electricity to the bus in a competitive power supply mode and the bus is powered on, whether the electricity on the bus is supplied by the current internal machine is determined again, and if the controller of the current internal machine judges whether the electricity on the bus is supplied by the current internal machine, the controller of the current internal machine determines whether the electricity on the bus is supplied by the current internal machine. For example: and judging whether the bus has the voltage or not according to the detection result of the bus voltage. If the bus has no voltage, the power supply is competitively carried out, and then whether the internal machine executes the power supply is judged under the condition that the bus has the voltage.

The second control process: and if the electricity on the bus is not supplied by the current internal machine, re-determining whether the bus is provided with a wired controller.

Specifically, determining whether power on the bus is being supplied by the current internal machine includes: and determining whether the current internal machine has a power supply mark when supplying power to the bus. And if the current inner machine has a power supply mark when supplying power to the bus, determining that the current inner machine supplies power to the bus, namely determining that the power on the bus is supplied by the current inner machine. If the current inner machine does not have a power supply mark when supplying power to the bus, determining that the current inner machine does not supply power to the bus, namely determining that the power on the bus is not supplied by the current inner machine.

For example: and under the condition that the bus has voltage, judging whether the internal machine executes power supply. If the internal machine performs power supply, the internal machine performing output power supply (namely the internal machine) is enabled to further detect the bus current under the condition that the internal machine performs power supply. If the internal machine does not execute power supply, the bus voltage is continuously detected. The judgment of whether the internal machine performs power supply can be performed according to a power supply mark when the internal machine supplies power to the bus, and if the internal machine supplies power to the bus, the power supply performed by the internal machine is determined under the condition that the bus has voltage.

In step S120, if there is a wired controller on the bus, the current internal machine is switched from the upper computer to the lower computer in the case that the current internal machine is the upper computer before the current internal machine, so as to wait for re-determining whether there is a wired controller on the bus, specifically, re-determining whether there is a wired controller on the bus according to the bus current. And under the condition that the current internal machine is a lower computer before the current internal machine, the current internal machine is enabled to continue to be the lower computer to wait for redetermining whether the bus is provided with the wired controller, specifically, whether the bus is provided with the wired controller is redetermined according to the bus current. Specifically, under the condition that a wired controller is connected to the bus, the inner machine does not need to be recharged with the role of the upper machine, namely, the inner machine is switched to the role of the lower machine or keeps the role of the lower machine. Wherein, switching into the next machine can mean: under the condition of the original wireless controller, if the internal machine serves as the role of the upper computer, the internal machine needs to be switched into the lower computer by the upper computer after the wire controller is accessed later.

In step S130, if there is no line controller on the bus, the current internal machine is switched to the upper computer, and the roll call sequence of the upper computer is executed, so that the current internal machine itself serves as the upper computer to control communication between other internal machines of the two or more internal machines. Of course, under the condition that no wire controller is arranged on the bus, if the current internal machine is an upper computer before, the current internal machine is enabled to continue to be the upper computer. Specifically, under the condition that no line controller is accessed on the bus, the local machine needs to execute a switching action, the lower machine is switched to the upper machine, and the roll calling time sequence of the upper machine is started to be executed. Wherein, the roll call time sequence of host computer can refer to: the upper computer sends a message to each lower computer and receives a response message fed back by each lower computer when receiving the message sent by the upper computer, so that communication between the upper computer and the lower computers is realized.

Specifically, under the condition of one machine with more controllers, any one of the internal machines can quickly judge whether a line controller exists on the bus network, and when the line controller does not exist, the internal machine is determined to be switched into an upper computer and a roll call time sequence of the upper computer is started to be executed; therefore, the problem that when one controller is used for controlling a plurality of internal machines, when the upper computer of the line controller does not exist on the bus network, communication interaction cannot be carried out among the internal machines is solved, and when the line controller does not exist on the bus network, one internal machine is determined and switched into the upper computer, communication interaction among other internal machines is realized, and reliable communication among the internal machines is realized.

In some embodiments, the communication control method of an air conditioning system further includes: i.e. a third determination scenario: if the bus current is larger than the second set current, executing a preset overcurrent protection action; wherein, carry out predetermined overcurrent protection action, include: disconnecting the power supply line of the wired controller under the condition that the wired controller is arranged on the bus; meanwhile, under the condition that the current internal machine is a lower computer before the current internal machine, the current internal machine is enabled to be a lower computer, and whether a wired controller is on the bus or not is determined again after the overcurrent protection action is finished, specifically whether power is on the bus or not is determined again; or, under the condition that the current internal machine is an upper computer before the current internal machine, switching the current internal machine from the upper computer to a lower computer, and waiting for re-determining whether the bus is provided with the wired controller or not after the overcurrent protection action is finished, specifically, re-determining whether the bus is provided with power or not.

Specifically, when the current value of the bus is detected to be larger than or equal to the second set current, the overcurrent abnormality of the bus circuit is indicated, the overcurrent protection action needs to be executed, the power supply line controller is disconnected, the role of the upper computer is quitted, the lower computer is switched to, and then the judgment is waited for again.

Through a large amount of tests, the technical scheme of the embodiment is adopted, and in the air conditioning system which controls a plurality of internal machines through an upper computer, the power which is supplied to the bus network by the internal machines is utilized to judge whether the line controller exists on the bus network, so that when the line controller does not exist on the bus network, one internal machine is determined from the internal machines, the internal machine is switched to the upper computer, and the role of the upper computer is executed. Therefore, when it is determined that the wire controller does not exist on the bus network, an internal machine is determined and switched into an upper computer, and communication interaction among other internal machines is realized.

According to the embodiment of the invention, the communication control device of the air conditioning system corresponding to the communication control method of the air conditioning system is also provided. Referring to fig. 4, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The air conditioning system includes: more than two internal machines. Each of the more than two internal machines is connected to the bus. Each of the more than two internal machines is connected to the bus through a corresponding interface respectively, so that the serial connection networking is realized through the bus. For example: and a plurality of internal units (such as the internal unit 1, the internal unit 2, the internal unit 3, the internal unit … and the internal unit N, wherein N is a positive integer) are connected to the network of the same bus in parallel. The air conditioning system can be a multi-split system, and can also be a system formed by serially connecting and networking a plurality of independent air conditioners through buses. The communication control device of the air conditioning system comprises: a determination unit 102 and a control unit 104.

The determining unit 102 is configured to, after a current internal machine of the more than two internal machines is powered on, enable the current internal machine to determine whether a wired controller is on the bus. Namely, whether the bus is provided with a wired controller or not is determined by the controller of the current internal machine. The specific function and processing of the determination unit 102 are referred to in step S110.

In some embodiments, the determining unit 102, determining whether a wired controller is on the bus, includes:

the determining unit 102 is specifically further configured to determine whether there is power on the bus, for example, whether there is power on the bus is determined by a controller of the current indoor unit itself. The specific function and processing of the determination unit 102 are also referred to in step S210. Wherein, the current internal machine means: among the powered-on internal machines of the more than two internal machines, one internal machine currently performs communication control.

In some embodiments, the determining unit 102, determining whether there is electricity on the bus, includes:

the determining unit 102 is specifically further configured to obtain the voltage on the bus detected by the voltage detecting module, and record the voltage as the bus voltage. That is, the voltage on the bus detected by a voltage detection module, such as a voltage sensor, is acquired by the controller of the present internal machine itself. It is then determined whether the bus voltage reaches a set voltage, which may be a voltage greater than 0V. The specific function and processing of the determination unit 102 are also referred to in step S310.

The determining unit 102 is specifically further configured to determine that there is electricity on the bus if the bus voltage reaches a set voltage. The specific function and processing of the determination unit 102 are also referred to in step S320.

The determining unit 102 is specifically configured to determine that there is no power on the bus if the bus voltage does not reach the set voltage. The specific function and processing of the determination unit 102 are also referred to in step S330.

The determining unit 102 is specifically configured to determine whether the power on the bus is supplied by the current internal machine if the bus has the power, for example, whether the power on the bus is supplied by the current internal machine is determined by a controller of the current internal machine. The specific function and processing of the determination unit 102 are also referred to in step S220. Wherein determining whether power on the bus is supplied by the current inner machine comprises: whether the current inner machine, namely the inner machine performs power supply or not, can be judged according to a power supply mark when the inner machine supplies power to the bus, and if the inner machine supplies power to the bus, the power supply performed by the inner machine is determined under the condition that the bus has voltage.

The determining unit 102 is specifically further configured to obtain the current on the bus detected by the current detecting module as a bus current if the electricity on the bus is supplied by the current internal machine. That is, the current on the bus detected by a current detection module, such as a current sensor, is acquired by the controller of the present internal machine itself. The specific function and processing of the determination unit 102 are also referred to in step S230.

The determining unit 102 is specifically configured to determine whether a wired controller is on the bus according to the bus current, for example, whether the wired controller is on the bus is determined by a controller of the current internal machine itself. The specific function and processing of the determination unit 102 are also referred to step S240.

In some embodiments, the determining unit 102, determining whether a wired controller is on the bus according to the bus current, includes any one of the following determination conditions:

the first determination case: the determining unit 102 is specifically further configured to determine that the wireless controller is on the bus if the bus current is less than a first set current (e.g., the first set current of the detected current value of the bus).

Second determination case: the determining unit 102 is specifically configured to determine that the wired controller is on the bus if the bus current is greater than or equal to a first setting current and less than or equal to a second setting current (e.g., a second setting current of the detected current value of the bus).

In some embodiments, the determining unit 102, determining whether there is a wired controller on the bus, further includes a control process of at least one of:

the first control process: the determining unit 102 is specifically configured to, if there is no power on the bus, re-determine whether the power on the bus is supplied by the current internal machine when more than two internal machines supply power to the bus in a contention power supply manner and the bus has power, and if the current internal machine has power, determine whether the power on the bus is supplied by the current internal machine by a controller of the current internal machine. For example: and judging whether the bus has the voltage or not according to the detection result of the bus voltage. If the bus has no voltage, the power supply is competitively carried out, and then whether the internal machine executes the power supply is judged under the condition that the bus has the voltage.

The second control process: the determining unit 102 is specifically further configured to, if the power on the bus is not supplied by the current internal machine, re-determine whether a wired controller is on the bus.

The control unit 104 is configured to, if a wired controller is located on the bus, switch the current internal machine from the upper computer to the lower computer if the current internal machine is the upper computer before the current internal machine, so as to wait for re-determining whether the bus is the wired controller, specifically, re-determining whether the bus is the wired controller according to the bus current. And under the condition that the current internal machine is a lower computer before the current internal machine, the current internal machine is enabled to continue to be the lower computer to wait for redetermining whether the bus is provided with the wired controller, specifically, whether the bus is provided with the wired controller is redetermined according to the bus current. The specific function and processing of the control unit 104 are referred to in step S120. Specifically, under the condition that a wired controller is connected to the bus, the inner machine does not need to be recharged with the role of the upper machine, namely, the inner machine is switched to the role of the lower machine or keeps the role of the lower machine. Wherein, switching into the next machine can mean: under the condition of the original wireless controller, if the internal machine serves as the role of the upper computer, the internal machine needs to be switched into the lower computer by the upper computer after the wire controller is accessed later.

The control unit 104 is further configured to, if no line controller is provided on the bus, switch the current internal machine to an upper computer and execute a roll call sequence of the upper computer, so that the current internal machine itself serves as the upper computer to control communication between other internal machines of the two or more internal machines. The specific function and processing of the control unit 104 are also referred to in step S130. Of course, under the condition that no wire controller is arranged on the bus, if the current internal machine is an upper computer before, the current internal machine is enabled to continue to be the upper computer. Specifically, under the condition that no line controller is accessed on the bus, the local machine needs to execute a switching action, the lower machine is switched to the upper machine, and the roll calling time sequence of the upper machine is started to be executed. Wherein, the roll call time sequence of host computer can refer to: the upper computer sends a message to each lower computer and receives a response message fed back by each lower computer when receiving the message sent by the upper computer, so that communication between the upper computer and the lower computers is realized.

Specifically, under the condition of one machine controlling a plurality of machines, any one of the plurality of machines can quickly judge whether a wire controller exists on the bus network, and when the wire controller does not exist, the machine is determined to be switched into an upper computer and starts to execute the roll calling time sequence of the upper computer. Therefore, the problem that when one controller is used for controlling a plurality of internal machines, when the upper computer of the line controller does not exist on the bus network, communication interaction cannot be carried out among the internal machines is solved, and when the line controller does not exist on the bus network, one internal machine is determined and switched into the upper computer, communication interaction among other internal machines is realized, and reliable communication among the internal machines is realized.

In some embodiments, the communication control device of the air conditioning system further includes: i.e. a third determination scenario: the control unit 104 is further configured to execute a preset overcurrent protection action if the bus current is greater than the second set current; wherein, carry out predetermined overcurrent protection action, include: disconnecting the power supply line of the wired controller under the condition that the wired controller is arranged on the bus; meanwhile, under the condition that the current internal machine is a lower computer before the current internal machine, the current internal machine is enabled to be a lower computer, and whether a wired controller is on the bus or not is determined again after the overcurrent protection action is finished, specifically whether power is on the bus or not is determined again; or, under the condition that the current internal machine is an upper computer before the current internal machine, switching the current internal machine from the upper computer to a lower computer, and waiting for re-determining whether the bus is provided with the wired controller or not after the overcurrent protection action is finished, specifically, re-determining whether the bus is provided with power or not.

Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 3, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.

Through a large number of tests, the technical scheme of the invention is adopted, and in the air conditioning system which controls a plurality of internal machines through an upper computer, the power supplied to the bus network by the internal machines is utilized to judge whether the wire controller exists on the bus network, so that when the wire controller does not exist on the bus network, one internal machine is determined from the internal machines, the internal machine is switched to the upper computer, the role of the upper computer is executed, and the communication interaction among the internal machines is facilitated.

According to the embodiment of the invention, an air conditioning system corresponding to the communication control device of the air conditioning system is also provided. The air conditioning system may include: the communication control device of the air conditioning system is described above.

The problem that when one controller has more controllers (for example, a plurality of internal machines are controlled by one upper computer), when the upper computer of the line controller does not exist on the bus network, communication interaction cannot be carried out among the internal machines is solved. In some schemes, in order to realize the switching of the upper computer and the lower computer, a non-automatic switching scheme is adopted, namely, a dial, a jumper cap and the like are utilized to select a designated node as the upper computer in a hardware mode, the scheme is not flexible enough, and the upper computer is inconvenient to use because the upper computer needs to be replaced manually; the other scheme is automatic switching, when the roll call data of the upper computer does not exist on the bus network, an internal machine is competed for switching to the role of the upper computer in a certain mode, the judgment is completely carried out by the bus data, the real-time performance is deficient, and the use is inconvenient.

In other schemes, a voltage detection circuit, a current detection circuit and a control method for a Home Bus System (HBS) communication mode are provided, wherein the detection circuit detects whether an internal machine supplies power to a line controller, and the current detection circuit detects a load power-on condition.

For example: in the HBS circuit, a control switch circuit and a voltage detection circuit may be provided. The control switch circuit is connected with the controller through a bus and is used for being connected with the controller; the voltage detection circuit is connected with the bus and is used for connecting the controller, and the example shown in fig. 6 can be seen. The voltage detection circuit detects whether the node in the bus supplies power to the line controller, and the controller sends out a conduction instruction to conduct the control switch circuit when the node in the bus does not supply power to the line controller, and the control switch circuit is connected to an external power supply and is transmitted to the line controller through the bus to supply power. When the multi-node line controller is adopted to supply power, the on-off of the power supply is controlled by detecting whether other nodes exist in the bus to supply power to the line controller. However, the problem that in the switching of the upper computer and the lower computer of the courtyard machine, when the upper computer needs to be replaced, a mode that a designated node needs to be selected as the upper computer is manually solved, and the use is inconvenient; or when the bus data judges that the roll call data of the upper computer does not exist on the bus network, the role of switching one internal machine to the upper computer is competed, so that the real-time performance is poor and the use is inconvenient.

In some embodiments, the present invention provides a method for switching master and slave nodes of an air conditioning system, which can rapidly determine whether a line controller exists on a bus network under the condition of one controller for a plurality of controllers, and when the line controller does not exist, determine that an internal unit is switched to an upper computer and start to execute a roll call timing sequence of the upper computer. Therefore, the problem that when one controller is used for controlling a plurality of controllers and no upper computer of the line controller exists on the bus network, communication interaction cannot be carried out between the internal machines. The air conditioning system can be a multi-split system, and can also be a system formed by serially connecting and networking a plurality of independent air conditioners through buses.

Specifically, in the scheme of the present invention, since the power supplied to the bus by the internal unit is used for supplying power to the line controller, the influence of fluctuation of the bus current when the line controller is powered on (for example, whether the bus has the wired controller or not can be determined when the current value of the bus is in different intervals), whether the line controller exists on the bus network is quickly determined, and if the wireless controller determines that one internal unit is switched to the role of the upper computer at random.

The following describes an exemplary implementation process of the scheme of the present invention with reference to the examples shown in fig. 4 to 7.

Fig. 4 is a schematic structural diagram of an embodiment of an air conditioning system. As shown in fig. 4, in the multi-split air conditioning system, a plurality of internal machines (such as internal machine 1, internal machine 2, internal machines 3 and …, and internal machine N, where N is a positive integer) are connected to the same bus network in parallel; meanwhile, if the unit of the air conditioning system is a courtyard unit, the wire controller can be selectively connected to the bus network.

Fig. 6 is a schematic structural diagram of an embodiment of a power supply control circuit of a line controller. As shown in fig. 6, the power supply control circuit of the line controller includes: the control circuit, the voltage detection circuit and the current detection circuit; the control circuit is connected with the line controller through a bus and is used for controlling an external power VCC1 to be transmitted to the line controller through the bus for supplying power; the voltage detection circuit is connected with the bus and used for detecting whether the node in the bus supplies power to the line controller or not and outputting a detection result to the controller, and the controller determines whether to control the input of the external power supply or not according to the result; the current detection circuit is connected in series in the power supply loop, and the current of the power supply loop is detected through sampling of the main chip, so that overcurrent protection is realized, and whether the line controller exists or not is detected.

The voltage detection circuit comprises an optical coupler which is used for respectively detecting the positive power supply condition and the negative power supply condition of the bus. When the bus is not powered and positive power supply or negative power supply is detected, the fact that other internal machines are powered is indicated.

Fig. 7 is a schematic diagram illustrating an indoor unit determining process according to an embodiment of the air conditioning system. As shown in fig. 7, the indoor unit determining process of the air conditioning system includes:

step 1, electrifying the internal unit, and detecting the bus voltage.

Specifically, under the condition that the internal machines are connected in series and are networked, only one internal machine is allowed to control the external power supply VCC1 to be conveyed to the bus, and the internal machines can supply power in a competitive mode by default to determine that one internal machine supplies power to the bus. Therefore, after each of the plurality of internal machines is powered on, each internal machine detects the power supply condition of the bus loop, and when the bus is detected to have no voltage, competitive power supply judgment is started, and one internal machine is determined from the plurality of internal machines to control the external power supply VCC1 to be transmitted to the bus.

And 2, judging whether the bus has voltage or not according to the detection result of the bus voltage. If the bus has voltage, step 3 is executed. If the bus has no voltage, the power supply is competitively provided, and then the step 3 is executed under the condition that the bus has the voltage. Wherein, the competitive power supply may refer to: the plurality of internal units respectively generate a random number, then count down is carried out based on the random number, and the internal unit supplies power to the bus when the timing number of the random number generated by which internal unit arrives first.

And 3, judging whether the internal machine executes power supply or not under the condition that the bus has voltage. And if the internal machine executes power supply, executing the step 4. If the internal machine does not supply power, returning to the step 1, and continuously detecting the bus voltage so that the internal machine which is possibly supplied with power has circuit fault or is disconnected from the power supply, and no internal machine supplies power on the bus, so that the power supply is required to be continuously judged and replaced at any time. The judgment of whether the internal machine performs power supply can be performed according to a power supply mark when the internal machine supplies power to the bus, and if the internal machine supplies power to the bus, the power supply performed by the internal machine is determined under the condition that the bus has voltage.

Step 4, under the condition that the internal machine executes power supply, the internal machine executing output power supply (namely the internal machine) further detects the bus current, namely the current condition of the bus loop, and the method specifically comprises the following conditions:

in the first case: detecting a relationship between a current value of the bus and a first set current (i.e., a first threshold value in fig. 7), where a value of the first set current is related to a hardware load circuit of the line controller, and is used to indicate a current state of the line controller during normal operation; when the current value of the bus is detected to be smaller than the first set current, the fact that no wire controller is connected to the bus is indicated, the local internal machine needs to execute switching action, the lower computer is switched to the upper computer, and the roll calling time sequence of the upper computer is started to be executed. Wherein, the roll call time sequence of host computer can refer to: the upper computer sends a message to each lower computer and receives a response message fed back by each lower computer when receiving the message sent by the upper computer, so that communication between the upper computer and the lower computers is realized.

In the second case: when the current value of the bus is detected to be greater than or equal to the first set current, further detecting a relationship between the current value of the bus and a second set current (i.e., a second threshold value in fig. 7), where a value of the second set current is related to a carrying capacity of the bus circuit and is used to set a bus overcurrent value, where the first set current is less than the second set current; when the current value of the bus is detected to be between the first set current and the second set current, the fact that the line controller is connected to the bus is indicated, and the role of the upper computer does not need to be recharged to the inner computer, namely the inner computer is switched to the role of the lower computer or the role of the lower computer is kept. Wherein, switching into the next machine can mean: under the condition of the original wireless controller, if the internal machine serves as the role of the upper computer, the internal machine needs to be switched into the lower computer by the upper computer after the wire controller is accessed later.

In the third case: when the current value of the bus is detected to be larger than or equal to the second set current, the overcurrent abnormality of the bus circuit is indicated, the overcurrent protection action needs to be executed, the power supply line controller is disconnected, the role of the upper computer is quitted, the lower computer is switched to, and then the judgment is waited again. Wherein, withdraw from acting as the host computer role, switch over to the next machine, can also mean: only quitting the role of serving as an upper computer and not judging whether the bus is a wired controller or not and judging the power supply condition; if the line controller is pulled out midway, the internal machine is required to be recharged as the upper computer, so that the judgment is required to be kept all the time; and, under the condition of original wireless accuse ware, if this internal unit is the role that is filled as the host computer, then, after coming into the line accuse ware, just need switch this internal unit into the next machine by the host computer.

Since the processing and functions of the air conditioning system of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus shown in fig. 4, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, and in the air conditioning system which controls a plurality of internal machines through an upper computer, the power supplied to the bus network by the internal machines is utilized to judge whether the line controller exists on the bus network, so that when the line controller does not exist on the bus network, one internal machine is determined from the internal machines, the internal machine is switched to the upper computer, the role of the upper computer is executed, and the reliability of communication interaction among the internal machines is improved.

According to an embodiment of the present invention, there is also provided a storage medium corresponding to a communication control method of an air conditioning system, the storage medium including a stored program, wherein when the program runs, a device in which the storage medium is located is controlled to execute the communication control method of the air conditioning system.

Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 3, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, and in an air conditioning system which controls a plurality of internal machines through an upper computer, the power supplied to a bus network by the internal machines is utilized to judge whether a line controller exists on the bus network, so that when the line controller does not exist on the bus network, one internal machine is determined from the internal machines, the internal machine is switched to the upper computer, the role of the upper computer is executed, and the reliable communication and information interaction among the internal machines can be realized.

According to an embodiment of the present invention, there is also provided a processor corresponding to the communication control method of the air conditioning system, the processor being configured to execute a program, wherein the program executes the communication control method of the air conditioning system.

Since the processing and functions implemented by the processor of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 3, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, and in the air conditioning system which controls a plurality of internal machines through an upper computer, the power supplied to the bus network by the internal machines is utilized to judge whether the line controller exists on the bus network, so that when the line controller does not exist on the bus network, one internal machine is determined from the internal machines, the internal machine is switched to the upper computer, and the role of the upper computer is executed, thus the communication interaction among the internal machines is more convenient and reliable.

In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A communication control method of an air conditioning system is characterized in that the air conditioning system comprises the following steps: more than two internal machines; each of the more than two internal machines is connected to the bus; the communication control method of the air conditioning system comprises the following steps:

after a current internal machine of the more than two internal machines is electrified, enabling the current internal machine to determine whether a wired controller is arranged on the bus or not;

if the bus is provided with the wire controller, the current inner machine is switched from the upper computer to the lower computer under the condition that the current inner machine is the upper computer in front of the current inner machine; under the condition that the current indoor unit is a lower computer before the current indoor unit, the current indoor unit is continuously a lower computer;

and if no wire controller is arranged on the bus, the current internal machine is switched to an upper computer, so that the current internal machine is used as the upper computer to control the communication between other internal machines in the more than two internal machines.

2. The communication control method of an air conditioning system according to claim 1, wherein determining whether a wire controller is provided on the bus comprises:

determining whether there is power on the bus;

if the bus is powered on, determining whether the power on the bus is supplied by the current internal machine;

if the electricity on the bus is supplied by the current internal machine, acquiring the current on the bus detected by a current detection module and recording the current as the bus current;

and determining whether a wired controller is arranged on the bus or not according to the bus current.

3. The communication control method of an air conditioning system according to claim 2, wherein determining whether a wire controller is on the bus further comprises at least one of:

if the bus is free of electricity, under the condition that more than two internal machines supply electricity to the bus in a competitive power supply mode and the bus is powered on, re-determining whether the electricity on the bus is supplied by the current internal machine;

and if the electricity on the bus is not supplied by the current internal machine, re-determining whether the bus is provided with a wired controller.

4. The communication control method of an air conditioning system according to claim 2 or 3, wherein determining whether there is electricity on the bus comprises:

acquiring the voltage on the bus detected by the voltage detection module, and recording the voltage as the bus voltage;

if the bus voltage reaches a set voltage, determining that the bus is electrified;

and if the bus voltage does not reach the set voltage, determining that no electricity exists on the bus.

5. The communication control method of an air conditioning system according to claim 2 or 3, wherein determining whether a controller is wired on the bus according to the bus current comprises:

if the bus current is smaller than a first set current, determining a wireless controller on the bus;

and if the bus current is greater than or equal to a first set current and less than or equal to a second set current, determining that a wired controller is arranged on the bus.

6. The communication control method of an air conditioning system according to claim 5, further comprising:

if the bus current is larger than the second set current, executing a preset overcurrent protection action; wherein, carry out predetermined overcurrent protection action, include:

disconnecting the power supply line of the wired controller under the condition that the wired controller is arranged on the bus; meanwhile, under the condition that the current indoor unit is a lower computer before the current indoor unit, the current indoor unit is continuously a lower computer;

or under the condition that the current inner machine is an upper computer in front of the current inner machine, the current inner machine is switched to a lower computer from the upper computer.

7. A communication control device of an air conditioning system, characterized in that the air conditioning system comprises: more than two internal machines; each of the more than two internal machines is connected to the bus; the communication control device of the air conditioning system comprises:

the determining unit is configured to enable a current inner machine of the more than two inner machines to determine whether a wired controller is arranged on the bus or not after the current inner machine is powered on;

the control unit is configured to enable the current inner machine to be switched from an upper computer to a lower computer under the condition that the current inner machine is the upper computer before the current inner machine if a wire controller is arranged on the bus; under the condition that the current indoor unit is a lower computer before the current indoor unit, the current indoor unit is continuously a lower computer;

the control unit is also configured to enable the current internal machine to be switched into an upper computer if no wire controller is arranged on the bus, so that the current internal machine can be used as the upper computer to control other internal machines in the more than two internal machines to communicate.

8. The communication control apparatus of an air conditioning system as claimed in claim 7, wherein the determining unit determining whether or not there is a wire controller on the bus comprises:

determining whether there is power on the bus;

9. The communication control apparatus of an air conditioning system according to claim 8, wherein the determination unit determines whether or not a wire controller is provided on the bus, further comprising at least one of:

10. The communication control device of an air conditioning system according to claim 8 or 9, wherein the determination unit determining whether there is electricity on the bus line includes:

11. The communication control apparatus of an air conditioning system according to claim 8 or 9, wherein the determining unit determines whether a controller is wired on the bus according to the bus current, includes:

12. The communication control device of an air conditioning system as claimed in claim 11, further comprising:

the control unit is further configured to execute a preset overcurrent protection action if the bus current is greater than the second set current; wherein, carry out predetermined overcurrent protection action, include:

13. An air conditioning system, comprising: the communication control device of the air conditioning system as claimed in any one of claims 7 to 12.

14. A storage medium comprising a stored program, wherein the apparatus in which the storage medium is installed is controlled to perform the communication control method of the air conditioning system according to any one of claims 1 to 6 when the program is executed.

15. A processor, characterized in that the processor is configured to execute a program, wherein the program executes the communication control method of the air conditioning system according to any one of claims 1 to 6.