A photovoltaic outdoor unit identification method, device and multi-connected system

Abstract

The application discloses a photovoltaic outdoor unit identification method and device and a multi-connected system. The method is applied to the multi-connected system, the outdoor unit of the multi-connected system comprises a master unit and a slave unit, the method comprises the following steps: determining whether the slave unit is a photovoltaic outdoor unit according to a signal detection circuit between the master unit and the slave unit, and determining whether the slave unit is a photovoltaic outdoor unit according to at least one kind of communication data between the master unit and the slave unit; if any determination result is yes, it is determined that the slave unit is a photovoltaic outdoor unit; if all determination results are no, it is determined that the slave unit is a non-photovoltaic outdoor unit. The signal detection circuit based on hardware can quickly and reliably identify the photovoltaic outdoor unit, double determination is conducted in combination with the communication data and the signal detection circuit, at least one kind of communication data is adopted, the reliability of photovoltaic outdoor unit identification can be improved, photovoltaic outdoor units and ordinary outdoor units can be more quickly and reliably identified, the mixed system is more stable, and the problem that the identification reliability of the photovoltaic outdoor unit is poor and has hysteresis is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of unit, in particular to a photovoltaic outdoor unit identification method and device and a multi-split system. BACKGROUND

[0002] With the development of new energy technology, photovoltaic air conditioners are favored due to their energy saving and cleanliness. However, due to their high price and complex installation, photovoltaic air conditioners are often mixed with ordinary multi-split systems to meet the needs of different users.

[0003] However, if the photovoltaic air conditioner and the ordinary air conditioner are misidentified when using this mixed system, there may be certain safety hazards. For example, if a photovoltaic multi-split outdoor unit (hereinafter referred to as a photovoltaic outdoor unit) is identified as an ordinary multi-split outdoor unit (hereinafter referred to as an ordinary outdoor unit), it may cause the photovoltaic power generation power to be mismatched with the actual unit operating power, resulting in current overload and inverter burnout and other reliability problems. Therefore, in a mixed system, it is particularly important to quickly and reliably identify photovoltaic and non-photovoltaic.

[0004] The traditional method of identifying photovoltaic outdoor units and ordinary outdoor units is to identify them by model ID. Photovoltaic outdoor units are assigned a specific ID by a program, and when the host identifies the specific ID, it can determine that it is a photovoltaic outdoor unit. However, there are many types of photovoltaic outdoor units, which may be assigned different ID values based on differences in function or structure. As market demand changes, the ID of the photovoltaic outdoor unit may become more and more numerous. In this way, the method of identifying by ID has certain risks, and the host may miss some ID of the photovoltaic outdoor unit during identification, or the host may not update the ID information of the photovoltaic outdoor unit in time when new and old units are matched, resulting in misidentification and control of the host as an ordinary outdoor unit. This traditional method of identifying photovoltaic outdoor units and ordinary outdoor units based on model ID in communication data is single, susceptible to interference, has insufficient reliability, and has a lag, which may cause current overload, burnout of the mainboard, and other problems of the unit over time, affecting the operation of the unit.

[0005] To address the problem of poor reliability and lag in the identification of photovoltaic outdoor units in the prior art, no effective solution has been proposed. SUMMARY

[0006] The embodiments of the present application provide a photovoltaic outdoor unit identification method, device and multi-split system to at least solve the problem of poor reliability and lag in the identification of photovoltaic outdoor units in the prior art.

[0007] To solve the above technical problems, the embodiments of the present application provide a photovoltaic outdoor unit identification method applied to a multi-split system, wherein the outdoor unit of the multi-split system includes a host and a slave, and the method includes:

[0008] determining whether the slave is a photovoltaic slave according to the signal detection circuit between the master and the slave, and determining whether the slave is a photovoltaic slave according to at least one communication data between the master and the slave;

[0009] If any of the determination results is yes, it is determined that the slave is a photovoltaic slave.

[0010] If all of the determination results are no, it is determined that the slave is a non-photovoltaic slave.

[0011] Optionally, the communication data comprises photovoltaic specific data, grid power and MAC address.

[0012] Optionally, determining whether the slave is a photovoltaic slave according to the photovoltaic specific data comprises:

[0013] receiving the communication data sent by the slave;

[0014] determining whether the communication data sent by the slave contains photovoltaic specific data;

[0015] If yes, it is determined that the slave is a photovoltaic slave.

[0016] Optionally, determining whether the slave is a photovoltaic slave according to the grid power comprises:

[0017] acquiring the grid power actually consumed by the slave in the current running state;

[0018] determining whether the total power consumed by the slave in the current running state is greater than the grid power;

[0019] If yes, it is determined that the slave is a photovoltaic slave.

[0020] Optionally, determining whether the slave is a photovoltaic slave according to the MAC address comprises:

[0021] acquiring the MAC address of the slave;

[0022] determining whether the MAC address of the slave belongs to the pre-stored MAC address of the photovoltaic slave;

[0023] If yes, it is determined that the slave is a photovoltaic slave.

[0024] Optionally, a signal detection circuit is connected between the master and each slave, the slave comprises a first port for connecting the signal detection circuit, the master comprises at least one second port for one-to-one connecting each signal detection circuit, the input end of the signal detection circuit is connected to the first port of the corresponding slave, and the output end of the signal detection circuit is connected to any second port of the master.

[0025] According to the signal detection circuit between the host and the slave, whether the slave is a photovoltaic outdoor unit is judged, comprising:

[0026] After the photovoltaic outdoor unit is powered on, the high level is output to the corresponding signal detection circuit through the first port of the photovoltaic outdoor unit;

[0027] When the host detects the high level through any second port, it is judged that the slave corresponding to the second port is a photovoltaic outdoor unit.

[0028] Optionally, the signal detection circuit comprises a first switching element, a second switching element and a power supply;

[0029] The first end of the first switching element is connected to the input end of the signal detection circuit, the second end of the first switching element is connected to the control input end of the second switching element, and the third end of the first switching element is grounded;

[0030] The first end of the second switching element is connected to the power supply, the second end of the second switching element is connected to the output end of the signal detection circuit, and in the case that the control input end is powered, the first end of the second switching element is connected to the second end of the second switching element.

[0031] Optionally, after determining that the slave is a photovoltaic outdoor unit or determining that the slave is a non-photovoltaic outdoor unit, further comprising:

[0032] The result of determining that the slave is a photovoltaic outdoor unit or determining that the slave is a non-photovoltaic outdoor unit is recorded as a first result;

[0033] A second result of identifying the slave as a photovoltaic outdoor unit according to the ID in the communication data is obtained;

[0034] The first result and the second result are compared;

[0035] If the first result and the second result are inconsistent, a communication function abnormality reminding message is output.

[0036] Embodiments of the application also provide a photovoltaic outdoor unit identification device applied to a multi-split system, wherein the outdoor units of the multi-split system comprise a host and a slave, and the device comprises:

[0037] A judgment module is configured to judge whether the slave is a photovoltaic outdoor unit according to the signal detection circuit between the host and the slave, and to judge whether the slave is a photovoltaic outdoor unit according to at least one kind of communication data between the host and the slave;

[0038] A first determination module is configured to determine that the slave is a photovoltaic outdoor unit if any judgment result is yes;

[0039] The second determining module is configured to determine that the slave is a non-photovoltaic outdoor unit if all the determination results are no.

[0040] The application also provides a multi-connected system, which comprises the photovoltaic outdoor unit identification device.

[0041] The application also provides a computer device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method when executing the computer program.

[0042] The application also provides a non-volatile computer readable storage medium, which stores a computer program, and the computer program is executable on the processor to implement the steps of the method.

[0043] According to the technical scheme of the application, whether the slave is a photovoltaic outdoor unit is determined according to the signal detection circuit between the master and the slave, and whether the slave is a photovoltaic outdoor unit is determined according to at least one communication data between the master and the slave; if any determination result is yes, the slave is determined to be a photovoltaic outdoor unit; if all the determination results are no, the slave is determined to be a non-photovoltaic outdoor unit. The signal detection circuit on the hardware is used for determination, so that the photovoltaic outdoor unit can be quickly and reliably identified. The communication data and the signal detection circuit are used for double determination, and at least one communication data is used for determination, so that the reliability of photovoltaic outdoor unit identification can be improved, the photovoltaic outdoor unit and the ordinary outdoor unit can be more quickly and reliably identified, a series of problems caused by incorrect identification or slow identification are avoided, the system in which the photovoltaic outdoor unit and the ordinary outdoor unit are mixed is more stable, the stability and reliability of the unit are improved, and the problem of poor reliability and hysteresis of photovoltaic outdoor unit identification is solved. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a flowchart of the photovoltaic outdoor unit identification method provided by the application;

[0045] Figure 2 is a schematic diagram of the signal detection circuit between the master and any slave provided by the application;

[0046] Figure 3 is a flowchart of the photovoltaic outdoor unit identification provided by the application;

[0047] Figure 4 is a structural block diagram of the photovoltaic outdoor unit identification device provided by the application. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the present application clearer, the following will further describe the present application in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0049] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in other than the order illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a list of steps or units need not be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to such processes, methods, products or devices.

[0050] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0051] The following will describe the optional embodiments of the present application in detail with reference to the drawings.

[0052] The embodiments of the present application provide a photovoltaic outdoor unit identification method, applied to a multi-split system, the multi-split system including at least two indoor units and at least two outdoor units, the multi-split system being a mixed system, i.e. the outdoor units include photovoltaic outdoor units and non-photovoltaic outdoor units (also referred to as ordinary outdoor units). For the multi-split system, sometimes multiple outdoor units need to be connected in the same network, at this time one of the outdoor units is set as a master (also referred to as a master module) for centralized control, only one master is set in a network, and the remaining outdoor units are referred to as slaves or sub-modules, i.e. the outdoor units include masters and slaves, the master can be a photovoltaic outdoor unit or a non-photovoltaic outdoor unit, and when the master is set, it is determined whether the master is a photovoltaic outdoor unit.

[0053] Figure 1 is a flowchart of the photovoltaic outdoor unit identification method provided by the embodiments of the present application, as shown in the figure, the method includes the following steps: Figure 1

[0054] ​S101, judging whether the slave is a photovoltaic outdoor unit according to a signal detection circuit between the master and the slave, and judging whether the slave is a photovoltaic outdoor unit according to at least one communication data between the master and the slave.

[0055] S102, if any of the judgment results is yes, determining that the slave is a photovoltaic outdoor unit; if all the judgment results are no, determining that the slave is a non-photovoltaic outdoor unit.

[0056] The embodiment judges whether the slave is a photovoltaic outdoor unit according to a signal detection circuit between the master and the slave, and judges whether the slave is a photovoltaic outdoor unit according to at least one communication data between the master and the slave; if any of the judgment results is yes, determining that the slave is a photovoltaic outdoor unit; if all the judgment results are no, determining that the slave is a non-photovoltaic outdoor unit. The judgment based on the signal detection circuit on the hardware can realize fast and reliable identification of the photovoltaic outdoor unit; the double judgment combining the communication data and the signal detection circuit and the judgment using at least one communication data can improve the reliability of the photovoltaic outdoor unit identification, realize faster and more reliable identification of the photovoltaic outdoor unit and the ordinary outdoor unit, avoid a series of problems caused by incorrect or slow identification, make the system of the ordinary outdoor unit and the photovoltaic outdoor unit more stable, improve the stability and reliability of the unit, and solve the problem of poor identification reliability and hysteresis of the photovoltaic outdoor unit.

[0057] The most significant difference between the photovoltaic outdoor unit and the ordinary outdoor unit is that the photovoltaic outdoor unit has a solar panel and can store or supply power to the unit, which is energy-saving and environmentally friendly.

[0058] The above communication data includes photovoltaic specific data, grid power and MAC address. In specific implementation, the photovoltaic outdoor unit can be judged according to the above at least one, for example, only the photovoltaic specific data is used for judgment, or the photovoltaic specific data and the MAC address are used for judgment, or the photovoltaic specific data, the grid power and the MAC address are used for judgment.

[0059] The various judgment methods are described below.

[0060] (1) Photovoltaic specific data

[0061] Since the photovoltaic outdoor unit has great differences in function and structure compared with the ordinary outdoor unit, the photovoltaic outdoor unit will inevitably send some data specific to the photovoltaic air conditioner when communicating with the master, or some data for easy identification can be added, such as the current storage power or the power generated in a period of time.

[0062] The photovoltaic specific data refers to the pre-set data specific to the photovoltaic air conditioner for easy identification.

[0063] The method for judging whether the slave machine is a photovoltaic outdoor unit according to photovoltaic specific data comprises the following steps: receiving the communication data sent by the slave machine; judging whether the communication data sent by the slave machine contains photovoltaic specific data; if yes, judging that the slave machine is a photovoltaic outdoor unit.

[0064] The method for judging whether the slave machine is a photovoltaic outdoor unit according to photovoltaic specific data can realize reliable identification of the photovoltaic outdoor unit. Preferably, when the master machine receives the photovoltaic specific data at least twice, it is determined that the slave machine is a photovoltaic outdoor unit, so that the judgment is more accurate.

[0065] (2) Grid power

[0066] The method for judging whether the slave machine is a photovoltaic outdoor unit according to grid power comprises the following steps: obtaining the actual grid power consumed by the slave machine in the current running state; judging whether the total power required to be consumed by the slave machine in the current running state is greater than the grid power; if yes, judging that the slave machine is a photovoltaic outdoor unit.

[0067] The photovoltaic air conditioner can distinguish photovoltaic power and grid power. If the fan or compressor of an outdoor unit is normally operated, but the actual grid power consumed is extremely small, and the power required by the unit in the current running state cannot be reached, it can be determined that the outdoor unit is a photovoltaic outdoor unit.

[0068] The method for judging whether the slave machine is a photovoltaic outdoor unit by detecting the relationship between the current running state of the outdoor unit and the grid power can realize reliable identification of the photovoltaic outdoor unit.

[0069] (3) MAC address

[0070] When the multi-connected system is used for the first time, the MAC addresses of all photovoltaic outdoor units in the mixed system can be stored in the master machine. The address chip is welded on the mainboard of the outdoor unit, and the MAC address of each mainboard is unique and will not change.

[0071] The method for judging whether the slave machine is a photovoltaic outdoor unit according to the MAC address comprises the following steps: obtaining the MAC address of the slave machine; judging whether the MAC address of the slave machine belongs to the pre-stored MAC address of the photovoltaic outdoor unit; if yes, judging that the slave machine is a photovoltaic outdoor unit.

[0072] The method for judging whether the slave machine is a photovoltaic outdoor unit by pre-storing the MAC address of the photovoltaic outdoor unit and binding the photovoltaic outdoor unit with the MAC address can realize reliable identification of the photovoltaic outdoor unit.

[0073] (4) Hardware detection

[0074] A signal detection circuit is connected between the master unit and each slave unit. Each slave unit includes a first port for connecting to the signal detection circuit, and the master unit includes at least one second port for correspondingly connecting to each signal detection circuit. For any given signal detection circuit, its input is connected to the first port of the corresponding slave unit, and its output is connected to any second port of the master unit. The first and second ports can be I / O ports of the external MCU.

[0075] For example, with n slave devices, n signal detection circuits need to be set up. Each slave device connects to the input terminal of the corresponding signal detection circuit through its own first port. The master device connects to the output terminals of the n signal detection circuits one by one through its own n second ports. After the photovoltaic outdoor unit is powered on, it will output a high level to the corresponding signal detection circuit through its own first port. Non-photovoltaic outdoor units will not output a high level through their own first ports.

[0076] The system determines whether a slave unit is a photovoltaic outdoor unit based on the signal detection circuit between the master and slave units. This includes: after the photovoltaic outdoor unit is powered on, it outputs a high level to the corresponding signal detection circuit through its first port; when the master detects a high level through any second port, it determines that the slave unit corresponding to that second port is a photovoltaic outdoor unit.

[0077] This method uses hardware detection circuits to identify photovoltaic outdoor units, enabling rapid and reliable identification.

[0078] Specifically, the signal detection circuit may include: a first switching element, a second switching element, and a power supply.

[0079] The first terminal of the first switching element is connected to the input terminal of the signal detection circuit, the second terminal of the first switching element is connected to the control input terminal of the second switching element, and the third terminal of the first switching element is grounded. The first switching element is used to control the circuit between the input terminal of the signal detection circuit and the second switching element to be turned on or off. For example, the first switching element can be a transistor.

[0080] The first end of the second switching element is connected to the power supply, and the second end of the second switching element is connected to the output terminal of the signal detection circuit. When the control input terminal is energized, the first end and the second end of the second switching element are connected. The second switching element is used to control the circuit between the power supply and the output terminal of the signal detection circuit to be turned on or off. For example, the second switching element can be a relay, with the coil portion of the relay serving as the control input terminal.

[0081] like Figure 2 The diagram shown is a schematic of the signal detection circuit between the master and any slave device. Figure 2In the circuit shown in the figure, MCU1 I / O is the IO port of the slave, which can output high or low level. MCU2 I / O is the IO port of the master, which can input high or low level. Q1 is a triode, which is used to control the circuit conduction or disconnection between MCU1 I / O and relay K1. K1 is a relay, which is used to control the circuit conduction or disconnection between power supply VCC and MCU2 I / O. D1 is a diode, which is used for freewheeling and protecting the circuit. C1 is a filter capacitor, which is used to filter out the interference of the relay coil. R1 and R2 are current limiting resistors, which are used to protect the IO port. R3 is a voltage dividing resistor.

[0082] When Figure 2 MCU1 I / O in the circuit belongs to a photovoltaic external machine, the unit is powered on, which will output high level through MCU1 I / O, so that the triode Q1 is turned on, and the 12V power supply and the relay K1 form a loop, so that the relay K1 is energized and attracted, the circuit between VCC and the master MCU2 I / O is conducted, and the MCU2 I / O detects high level, so that it can be judged that the slave connected thereto is a photovoltaic external machine, otherwise it is a non-photovoltaic external machine.

[0083] It should be noted that Figure 2 The circuit shown in the figure is only used to better illustrate the present application, and does not constitute an improper limitation on the present application. The signal detection circuit is not limited to the above structure, and other structures of the circuit capable of realizing signal detection can also be used.

[0084] In one embodiment, after determining that the slave is a photovoltaic external machine or determining that the slave is a non-photovoltaic external machine, the result of determining that the slave is a photovoltaic external machine or determining that the slave is a non-photovoltaic external machine is recorded as a first result, a second result of identifying the slave as a photovoltaic external machine according to the ID in the communication data is obtained, the first result and the second result are compared, if the first result and the second result are inconsistent, it indicates that the communication function of the unit may be abnormal, and a communication function abnormality reminding message is output, and if the first result and the second result are consistent, no processing is needed.

[0085] The embodiment is based on communication data (at least one) and signal detection circuit to judge, when the master identifies the slave as a photovoltaic external machine by any of the above methods, it can be directly processed according to the photovoltaic multi-unit. Then compare with the ID identification result, if they are inconsistent, it means that the communication function of the unit may be abnormal, which can remind the user to check in time by displaying a specific code on the digital tube. The above comparison and reminding do not affect the identification and judgment of the photovoltaic external machine.

[0086] As Figure 3 shown, the flow chart for identifying a photovoltaic external machine includes the following steps:

[0087] S301, for any slave, the following steps are performed to identify.

[0088] S302, detecting whether there is photovoltaic specific data in the communication data, if yes, entering S306, if no, entering S303.

[0089] S303, detecting whether the actual consumed grid power of the slave machine matches the current operating condition, if not matching (i.e. the total power required to be consumed by the slave machine in the current operating state is greater than the actual consumed grid power), entering S306, if matching (i.e. the total power required to be consumed by the slave machine in the current operating state is equal to the actual consumed grid power), entering S304.

[0090] S304, judging whether the MAC address of the slave machine belongs to the pre-stored MAC address of the photovoltaic external machine, if yes, entering S306, if no, entering S305.

[0091] S305, not making judgment first.

[0092] S306, judging as a photovoltaic external machine.

[0093] S307, whether the signal detection IO port corresponding to the master machine detects high level, if yes, entering S308, if no, entering S309.

[0094] S308, judging as a photovoltaic external machine.

[0095] S309, not making judgment first.

[0096] S310, whether there is a judgment result of the above-mentioned any one way as a photovoltaic external machine, if yes, entering S311, if no, entering S312.

[0097] S311, determining that the slave machine is a photovoltaic external machine.

[0098] S312, determining that the slave machine is a common external machine.

[0099] Among them, S302 to S304 are based on the judgment of communication data, the execution order of the three judgment ways can be changed, and they can also be executed simultaneously. The judgment based on communication data of S302 to S304 and the judgment based on hardware detection circuit of S307 can be executed simultaneously or sequentially.

[0100] The above-mentioned embodiment in the mixed system of photovoltaic external machine and common external machine, through multi-means combination recognition of photovoltaic external machine, based on the dual rapid judgment of hardware detection circuit and communication data, can more quickly and reliably recognize the photovoltaic external machine and the common external machine, avoid a series of problems caused by incorrect recognition or slow recognition, make the mixed system of common multi-connected machine and photovoltaic multi-connected machine more stable, and improve the stability and reliability of the machine set.

[0101] Based on the same inventive concept, the application also provides a photovoltaic outdoor unit identification device, which can be used to implement the photovoltaic outdoor unit identification method described in the above embodiments. The photovoltaic outdoor unit identification device is applied to a multi-connected system, and the outdoor units of the multi-connected system include a master unit and a slave unit. The photovoltaic outdoor unit identification device can be realized by software and / or hardware, and the photovoltaic outdoor unit identification device can be generally integrated into the master unit of the multi-connected system.

[0102] Figure 4 is a structural block diagram of the photovoltaic outdoor unit identification device provided by the application, as shown in the figure, the photovoltaic outdoor unit identification device includes: Figure 4

[0103] The judging module 41 is used to judge whether the slave unit is a photovoltaic outdoor unit according to the signal detection circuit between the master unit and the slave unit, and to judge whether the slave unit is a photovoltaic outdoor unit according to at least one kind of communication data between the master unit and the slave unit.

[0104] The determining module 42 is used to determine that the slave unit is a photovoltaic outdoor unit if any of the judgment results is yes, and to determine that the slave unit is a non-photovoltaic outdoor unit if all the judgment results are no.

[0105] Optionally, the communication data includes photovoltaic specific data, grid power and a MAC address.

[0106] Optionally, the judging module 41 includes:

[0107] The receiving unit is used to receive the communication data sent by the slave unit.

[0108] The first judging unit is used to judge whether there is photovoltaic specific data in the communication data sent by the slave unit.

[0109] The second judging unit is used to judge that the slave unit is a photovoltaic outdoor unit if there is.

[0110] Optionally, the judging module 41 includes:

[0111] The first obtaining unit is used to obtain the grid power actually consumed by the slave unit in the current running state.

[0112] The third judging unit is used to judge whether the total power required to be consumed by the slave unit in the current running state is greater than the grid power.

[0113] The fourth judging unit is used to judge that the slave unit is a photovoltaic outdoor unit if yes.

[0114] Optionally, the judging module 41 includes:

[0115] The second obtaining unit is used to obtain the MAC address of the slave unit.

[0116] ​The fifth judging unit is configured to judge whether the MAC address of the slave machine belongs to the pre-stored MAC address of the photovoltaic outdoor unit.

[0117] The sixth judging unit is configured to judge that the slave machine is the photovoltaic outdoor unit if the MAC address of the slave machine belongs to the pre-stored MAC address of the photovoltaic outdoor unit.

[0118] Optionally, a signal detection circuit is connected between the master machine and each slave machine, the slave machine comprises a first port for connecting the signal detection circuit, the master machine comprises at least one second port for one-to-one connecting each signal detection circuit, an input end of the signal detection circuit is connected to the first port of the corresponding slave machine, and an output end of the signal detection circuit is connected to any second port of the master machine.

[0119] The photovoltaic outdoor unit outputs a high level to the corresponding signal detection circuit through the first port of the photovoltaic outdoor unit after being powered on.

[0120] The judging module 41 is specifically configured to judge that the slave machine corresponding to the second port is the photovoltaic outdoor unit when the master machine detects the high level through any second port.

[0121] Optionally, the signal detection circuit comprises a first switch element, a second switch element and a power supply.

[0122] A first end of the first switch element is connected to the input end of the signal detection circuit, a second end of the first switch element is connected to a control input end of the second switch element, and a third end of the first switch element is grounded.

[0123] A first end of the second switch element is connected to the power supply, a second end of the second switch element is connected to the output end of the signal detection circuit, and the first end of the second switch element is connected to the second end of the second switch element in the case that the control input end is electrified.

[0124] Optionally, the photovoltaic outdoor unit identification device further comprises:

[0125] The first obtaining module is configured to record a result of determining that the slave machine is the photovoltaic outdoor unit or determining that the slave machine is not the photovoltaic outdoor unit as a first result.

[0126] The second obtaining module is configured to obtain a second result of identifying the slave machine as the photovoltaic outdoor unit according to the ID in the communication data.

[0127] The comparison module is configured to compare the first result and the second result.

[0128] The output module is configured to output a communication function abnormality reminding message if the first result and the second result are inconsistent.

[0129] The photovoltaic outdoor unit identification device described above can execute the photovoltaic outdoor unit identification method provided by the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method. Technical details not described in detail in the embodiments can be referred to the photovoltaic outdoor unit identification method provided by the embodiments of the present application.

[0130] The embodiments of the present application also provide a multi-connected system, comprising the photovoltaic outdoor unit identification device described in the above embodiments.

[0131] The embodiments of the present application also provide a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method described in the above embodiments.

[0132] The embodiments of the present application also provide a non-volatile computer readable storage medium, which stores a computer program, wherein the computer program is executed by a processor to implement the steps of the method described in the above embodiments.

[0133] The device embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0134] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in the embodiments or some parts of the embodiments.

[0135] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A photovoltaic outdoor unit identification method, applied to a multi-split air conditioning system, wherein the outdoor unit of the multi-split air conditioning system includes a main unit and a slave unit, characterized in that, The method includes: The system determines whether the slave unit is a photovoltaic outdoor unit based on the signal detection circuit between the master and slave units, and determines whether the slave unit is a photovoltaic outdoor unit based on at least one type of communication data between the master and slave units; If any judgment result is yes, then the slave unit is determined to be a photovoltaic outdoor unit; If all judgment results are negative, then the slave unit is determined to be a non-photovoltaic outdoor unit; A signal detection circuit is connected between the master unit and each slave unit. The slave unit includes a first port for connecting the signal detection circuit, and the master unit includes at least one second port for connecting each signal detection circuit in a one-to-one correspondence. The input terminal of the signal detection circuit is connected to the first port of the corresponding slave unit, and the output terminal of the signal detection circuit is connected to any second port of the master unit. The system determines whether the slave unit is a photovoltaic outdoor unit based on the signal detection circuit between the master and slave units, including: After the photovoltaic outdoor unit is powered on, it outputs a high level to the corresponding signal detection circuit through its first port; When the host detects a high level through any second port, it determines that the slave unit corresponding to that second port is a photovoltaic outdoor unit.

2. The method of claim 1, wherein, The communication data includes: photovoltaic-specific data, grid power, and MAC address.

3. The method of claim 2, wherein, Determining whether a slave unit is a photovoltaic outdoor unit based on specific photovoltaic data includes: Receive communication data sent by the slave device; Determine whether photovoltaic-specific data exists in the communication data sent by the slave device; If it exists, then the slave unit is determined to be a photovoltaic outdoor unit.

4. The method of claim 2, wherein, Determining whether the slave unit is a photovoltaic outdoor unit based on the grid power supply includes: Obtain the actual amount of electricity consumed by the slave device in its current operating state; Determine whether the total power consumption required by the slave device in its current operating state is greater than the power consumption of the power grid. If so, then the slave unit is determined to be a photovoltaic outdoor unit.

5. The method of claim 2, wherein, Determining whether the slave device is a photovoltaic outdoor unit based on its MAC address includes: Obtain the MAC address of the slave device; Determine whether the MAC address of the slave device belongs to the pre-stored MAC address of the photovoltaic outdoor unit; If so, then the slave unit is determined to be a photovoltaic outdoor unit.

6. The method according to claim 1, characterized in that, The signal detection circuit includes: a first switching element, a second switching element, and a power supply; The first terminal of the first switching element is connected to the input terminal of the signal detection circuit, the second terminal of the first switching element is connected to the control input terminal of the second switching element, and the third terminal of the first switching element is grounded. The first end of the second switching element is connected to the power supply, and the second end of the second switching element is connected to the output terminal of the signal detection circuit. When the control input terminal is energized, the first end of the second switching element is connected to the second end of the second switching element.

7. The method according to any one of claims 1 to 6, characterized in that, After determining whether the slave unit is a photovoltaic outdoor unit or a non-photovoltaic outdoor unit, the following steps are also included: The result that determines whether the slave unit is a photovoltaic outdoor unit or a non-photovoltaic outdoor unit is recorded as the first result; Obtain the second result of identifying the photovoltaic outdoor unit based on the ID in the communication data; Compare the first result with the second result; If the first result is inconsistent with the second result, a communication function error reminder message will be output.

8. A photovoltaic outdoor unit identification device, applied to a multi-split air conditioning system, wherein the outdoor unit of the multi-split air conditioning system includes a main unit and a slave unit, characterized in that, The device includes: The judgment module is used to determine whether the slave unit is a photovoltaic outdoor unit based on the signal detection circuit between the master and slave units, and to determine whether the slave unit is a photovoltaic outdoor unit based on at least one type of communication data between the master and slave units; The first determining module is used to determine that the slave unit is a photovoltaic outdoor unit if any judgment result is yes; The second determining module is used to determine that the slave unit is a non-photovoltaic outdoor unit if all judgment results are negative. A signal detection circuit is connected between the master unit and each slave unit. The slave unit includes a first port for connecting the signal detection circuit, and the master unit includes at least one second port for connecting each signal detection circuit in a one-to-one correspondence. The input terminal of the signal detection circuit is connected to the first port of the corresponding slave unit, and the output terminal of the signal detection circuit is connected to any second port of the master unit. After the photovoltaic outdoor unit is powered on, it outputs a high level to the corresponding signal detection circuit through its first port; The judgment module is used to: when the host detects a high level through any second port, determine that the slave unit corresponding to the second port is a photovoltaic outdoor unit.

9. A multi-split air conditioning system, characterized in that, include: The photovoltaic outdoor unit identification device as described in claim 8.

10. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the steps of the method according to any one of claims 1 to 7.

11. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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