A central air conditioning system

Abstract

The application discloses a central air conditioning system, comprising an air conditioner communication module, an electric meter communication module, a storage module and a control module, the storage module is used for storing the matching relationship between the outdoor unit and the electric meter, the corresponding relationship between the outdoor unit running time and the normal power consumption range of the outdoor unit; the control module is configured to obtain the electric meter data and the outdoor unit running state within a specific time, calculate the power consumption of the electric meter and the cumulative running time of the outdoor unit within the specific time, when the cumulative running time of the outdoor unit does not reach the outdoor unit running time, and the power consumption of the electric meter matched with the outdoor unit exceeds the upper limit of the normal power consumption corresponding to the outdoor unit running time, or when the cumulative running time of the outdoor unit exceeds the outdoor unit running time, and the power consumption of the electric meter matched with the outdoor unit does not reach the lower limit of the normal power consumption corresponding to the outdoor unit running time, the matching relationship between the outdoor unit and the electric meter is judged to be wrong. The application can automatically identify and judge whether the matching relationship between the outdoor unit and the electric meter is wrong.

Description

Technical Field

[0001] This invention relates to the field of central air conditioning technology, and in particular to a central air conditioning system capable of automatically determining whether the matching relationship between the outdoor unit of a central air conditioning system and the electricity meter is correct. Background Technology

[0002] Existing multi-split central air conditioning systems generally employ individual billing. This involves using an electricity meter to measure the power consumption of the outdoor unit. The individual billing system communicates with the meter, receiving the data as the basis for calculating the outdoor unit's power consumption. Based on the outdoor unit's power consumption and the indoor unit's operating status, the system allocates the power consumption to the indoor units, thus achieving individual billing. When using individual billing, the matching relationship between the air conditioning unit (outdoor unit) and the electricity meter that collects its energy consumption must be consistent with the actual hardware wiring.

[0003] In actual engineering installations, due to the large number of outdoor units and electricity meters in a central air conditioning system, mismatches between the air conditioning system and the electricity meters frequently occur. The main reasons for these errors include the following three aspects:

[0004] 1. The matching relationship between the air conditioning system and the electricity meter is manually entered into the individual billing information management platform, which may result in errors.

[0005] 2. The electricity meters for multiple air conditioning systems are installed in the same location, and there is a possibility that the communication lines of the electricity meters may be connected incorrectly;

[0006] 3. The address of some electricity meters needs to be set on-site, and there is a possibility that the set information and the entered information are inconsistent.

[0007] If the matching relationship is inconsistent with the actual hardware wiring, it will cause misattribution of power consumption. For example, outdoor unit A is actually connected to meter a, and outdoor unit B is actually connected to meter b. However, in the matching relationship, outdoor unit A is stored as matched with meter b, and outdoor unit B is matched with meter a. Therefore, when calculating power consumption, the power consumption of meter a is counted as the power consumption of outdoor unit B, and the power consumption of meter b is counted as the power consumption of outdoor unit A, resulting in incorrect power consumption statistics.

[0008] The problem of mismatch between air conditioning system and electricity meter is often hidden and difficult to detect in a short time. Users only look for the cause when they feel that the actual electricity consumption does not match the allocated electricity bill. By the time the electricity allocation error is discovered in the later stage, it has often caused irreparable losses.

[0009] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0010] This invention proposes a central air conditioning system that solves the technical problem that existing central air conditioning systems cannot identify whether the matching relationship between the outdoor unit and the electricity meter is the same as the actual hardware connection relationship.

[0011] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0012] In some embodiments of this application, a central air conditioning system is provided, comprising:

[0013] The air conditioner communication module is used to receive the operating status of the outdoor unit;

[0014] The electricity meter communication module is used to receive electricity meter data; the electricity meter is connected to the outdoor unit.

[0015] The storage module is used to store the matching relationship between the outdoor unit and the electricity meter, and the correspondence between the outdoor unit's operating time and the normal power consumption range of the outdoor unit.

[0016] The control module is configured to: acquire electricity meter data and outdoor unit operating status within a specific time period, and calculate the electricity consumption of the electricity meter and the cumulative operating time of the outdoor unit within the specific time period;

[0017] If the cumulative operating time of the outdoor unit does not reach the outdoor unit's operating time, but the power consumption of the electricity meter matched with the outdoor unit exceeds the normal power consumption limit corresponding to the outdoor unit's operating time, it indicates that the outdoor unit's power consumption is higher than the upper limit of the normal power consumption range for the outdoor unit's operating time within a shorter operating period than the outdoor unit's operating time, which is illogical, and the matching relationship between the outdoor unit and the electricity meter is determined to be incorrect. Alternatively, if the cumulative operating time of the outdoor unit exceeds the outdoor unit's operating time, but the power consumption of the electricity meter matched with the outdoor unit does not reach the lower limit of the normal power consumption range corresponding to the outdoor unit's operating time, it indicates that the outdoor unit's power consumption is lower than the lower limit of the normal power consumption range for the outdoor unit's operating time within a longer operating period than the outdoor unit's operating time, which is illogical, and the matching relationship between the outdoor unit and the electricity meter is determined to be incorrect.

[0018] In some embodiments, the storage module stores the outdoor unit's first operating time and the upper limit of normal power consumption during the first operating time, and the outdoor unit's second operating time and the lower limit of normal power consumption during the second operating time. The control module is configured to determine that the matching relationship between the outdoor unit and the electricity meter is incorrect when the cumulative operating time of the outdoor unit has not reached the first time and the power consumption of the electricity meter matched with the outdoor unit exceeds the upper limit of normal power consumption during the first time, or when the cumulative operating time of the outdoor unit has exceeded the second time and the power consumption of the electricity meter matched with the outdoor unit has not reached the lower limit of normal power consumption during the second time. The second time is longer than the first time; by setting the first time and the second time separately, the accuracy of the determination result can be improved.

[0019] In some embodiments, the control module is configured to determine that the matching relationship between the outdoor unit and the electricity meter is incorrect when the cumulative running time of the outdoor unit is zero and the power consumption of the electricity meter matched with the outdoor unit exceeds the normal power consumption limit corresponding to the zero running time of the outdoor unit. The result of the judgment is most accurate when the cumulative running time is zero.

[0020] In some embodiments, the upper limit of normal power consumption corresponding to the outdoor unit running time of zero is determined based on the input power of the outdoor unit compressor electric heating belt and a specific time. This determination method is realistic and can improve the accuracy of the judgment result.

[0021] In some embodiments, the control module is configured to output a prompt when it determines that the matching relationship between the outdoor unit and the electricity meter is incorrect, and the duration of the prompt is a set reminder time to facilitate staff handling.

[0022] In some embodiments, the control module is configured to extend the duration of the prompt if, within a set reminder time, it is determined again that the matching relationship between the outdoor unit and the electricity meter is incorrect, thereby preventing staff from missing the process.

[0023] In some embodiments, the central air conditioning system includes:

[0024] A marking input module is used to mark the outdoor unit and the electricity meter that are determined to have an incorrect matching relationship;

[0025] The control module is configured to not determine whether the matching relationship between the outdoor unit and the electricity meter is incorrect before modifying the marked matching relationship between the outdoor unit and the electricity meter.

[0026] In some embodiments, the air conditioning communication module is used to receive the operating status of the indoor unit, and the control module is configured to determine the operating status of the outdoor unit based on the operating status of the indoor unit corresponding to the outdoor unit when the operating status of the outdoor unit cannot be obtained. When at least one indoor unit is running, it is determined that the outdoor unit is running, and when all indoor units are not running, it is determined that the outdoor unit is not running.

[0027] In some embodiments, the storage module is used to store the correspondence between the outdoor unit's operating time and the outdoor unit's model information and / or capacity information, corresponding to the outdoor unit's normal power consumption range;

[0028] The control module is used to acquire the model information and / or capacity information of the outdoor unit, and to determine whether the matching relationship between the outdoor unit and the electricity meter is incorrect based on the relationship between the cumulative running time of the outdoor unit and the running time of the outdoor unit, and the correspondence between the power consumption of the electricity meter matched with the outdoor unit and the normal power consumption range of the outdoor unit corresponding to the model information and / or capacity information of the outdoor unit.

[0029] In some embodiments, the air conditioning communication module is used to receive the model information and / or capacity information of the outdoor unit; or, the central air conditioning system includes an information input module, which is used to input the model information and / or capacity information of the outdoor unit.

[0030] Compared with the prior art, the advantages and positive effects of the present invention are as follows: A central air conditioning system includes an air conditioning communication module, an electricity meter communication module, a storage module, and a control module. The air conditioning communication module is used to receive the operating status of the outdoor unit; the electricity meter communication module is used to receive electricity meter data, and the electricity meter is connected to the outdoor unit; the storage module is used to store the matching relationship between the outdoor unit and the electricity meter, and the correspondence between the outdoor unit's operating time and its normal power consumption range; the control module is configured to acquire the electricity meter data and the outdoor unit's operating status within a specific time period, calculate the electricity consumption of the electricity meter and the cumulative operating time of the outdoor unit within that specific time period, and determine that the matching relationship between the outdoor unit and the electricity meter is incorrect when the cumulative operating time of the outdoor unit has not reached the outdoor unit's operating time, or when the electricity consumption of the electricity meter matched with the outdoor unit exceeds the upper limit of the normal power consumption corresponding to the outdoor unit's operating time; or when the cumulative operating time of the outdoor unit exceeds the outdoor unit's operating time, or when the electricity consumption of the electricity meter matched with the outdoor unit has not reached the lower limit of the normal power consumption corresponding to the outdoor unit's operating time. This invention predetermines the correspondence between the outdoor unit's operating time and its normal power consumption range. Based on the relationship between the cumulative operating time of the outdoor unit and its actual operating time within a specific period, and the relationship between the power consumption of the electricity meter matched with the outdoor unit and the normal power consumption range corresponding to the outdoor unit's operating time, it determines whether the matching relationship between the outdoor unit and the electricity meter is incorrect. This can be automatically identified and determined during the commissioning or initial use phase of the central air conditioning system, avoiding errors in the outdoor unit's power consumption statistics during later use, thereby further preventing errors in the allocation of power consumption to the indoor unit.

[0031] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram according to an embodiment;

[0034] Figure 2 This is a schematic diagram of a distributed architecture according to an embodiment;

[0035] Figure 3 This is a schematic diagram illustrating the matching relationship between the outdoor unit, indoor unit, and electricity meter address according to an embodiment.

[0036] Figure 4 This is a schematic diagram showing the correspondence between the outdoor unit's operating time and the normal power consumption range of the outdoor unit according to an embodiment.

[0037] Figure 5 This is a flowchart according to an embodiment;

[0038] Figure 6 This is a schematic diagram showing the correspondence between the outdoor unit's operating time and the normal power consumption range of the outdoor unit according to an embodiment.

[0039] Figure 7 This is a flowchart according to an embodiment;

[0040] Figure 8 This is a schematic diagram showing the correspondence between the outdoor unit's operating time and the corresponding upper and lower limits of normal power consumption according to an embodiment.

[0041] Figure 9 This is a flowchart according to an embodiment;

[0042] Figure 10 This is a schematic diagram showing the relationship between the outdoor unit's operating time according to an embodiment and the upper limit of normal power consumption and the lower limit of normal power consumption corresponding to the first operating time and the second operating time of outdoor units of different models and capacities.

[0043] Figure 11 This is a flowchart according to an embodiment. Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0050] The central air conditioning system provided in this application includes several air conditioning units, which can be one or more. Each air conditioning unit includes an outdoor unit and an indoor unit, and the outdoor unit of each air conditioning unit corresponds to multiple indoor units.

[0051] The central air conditioning system of this application is particularly suitable for public building projects that include a large number of air conditioning units, such as office buildings, apartments, and commercial complexes. In this type of central air conditioning system, each outdoor unit is matched with an electricity meter, and it is necessary to set the address matching relationship between the outdoor unit and the electricity meter and to connect the hardware. Due to the large number of outdoor units, it is easy for the address matching relationship between the outdoor unit and the electricity meter to be inconsistent with the hardware connection.

[0052] For each air conditioning unit, the air conditioning system executes the refrigerant cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigerant cycle involves a series of processes, including compression, condensation, expansion, and evaporation, to cool or heat the indoor space.

[0053] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0054] The expansion valve expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioning unit regulates the temperature of the indoor space.

[0055] The outdoor unit of an air conditioning unit refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioning unit includes the indoor heat exchanger, and the expansion valve can be provided in either the indoor or outdoor unit.

[0056] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioning unit functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioning unit functions as a cooler in cooling mode.

[0057] like Figure 1 As shown, the central air conditioning system also includes an air conditioning communication module, an electricity meter communication module, a storage module, and a control module.

[0058] The air conditioning communication module communicates with the air conditioning unit, receives information from the air conditioning unit, and sends it to the control module.

[0059] In some embodiments, the air conditioning communication module receives the operating status of the outdoor unit, and the control module determines whether the outdoor unit is running based on the operating status of the outdoor unit.

[0060] Whether the outdoor unit of the air conditioning unit is running is mainly indicated by the start and stop of the compressor. When the compressor starts, it means that the outdoor unit is running, and when the compressor stops, it means that the outdoor unit has stopped running.

[0061] In some embodiments, the air conditioning communication module receives the operating status of the indoor unit.

[0062] When the control module is configured to fail to obtain the outdoor unit's operating status, it determines the outdoor unit's operating status based on the operating status of the corresponding indoor unit. If at least one indoor unit is running, it is determined that the outdoor unit is running; if all indoor units are not running, it is determined that the outdoor unit is not running.

[0063] In special circumstances such as communication abnormalities or failures between the air conditioner communication module and the outdoor unit, the air conditioner communication module cannot receive the outdoor unit's operating status. The outdoor unit's operating status and shutdown status may not be collected. That is, the control module cannot obtain the outdoor unit's operating status and cannot determine the cumulative operating time. To avoid this situation causing the application to fail, this embodiment adopts the following alternative solution:

[0064] The operating status of the outdoor unit is determined by the operating status of the indoor unit corresponding to the outdoor unit. Among all the indoor units corresponding to the outdoor unit, the operating status of all the indoor units corresponding to the outdoor unit is obtained. If any indoor unit is running, it is determined that the outdoor unit is running. If all the indoor units are stopped, it is determined that the indoor units are stopped.

[0065] The meter communication module communicates with the meter, receives meter data, and sends it to the control module.

[0066] The electricity meter is connected to the outdoor unit and is used to detect the total power consumption of the air conditioning unit where the outdoor unit is located.

[0067] Generally, each outdoor unit is connected to an electricity meter. The electricity meter detects the power consumption of the air conditioning unit to which the outdoor unit is located. The electricity meter detects the total power consumption of the air conditioning unit. However, the payment is often made by multiple users who use the indoor units. Therefore, it is necessary to distribute the power consumption of the air conditioning unit to each indoor unit based on the operating status of the indoor units.

[0068] exist Figure 2 In the example shown, the central air conditioning system includes multiple air conditioning units: air conditioning unit 1, air conditioning unit 2, ..., n*1 air conditioning unit, and n*2 air conditioning unit.

[0069] Each air conditioning unit includes one outdoor unit and several indoor units.

[0070] Each air conditioning unit is equipped with one electricity meter. For example, air conditioning unit No. 1 is equipped with electricity meter No. 1, air conditioning unit No. 2 is equipped with electricity meter No. 2, ..., air conditioning unit No. n*1 is equipped with electricity meter No. n*1, air conditioning unit No. n*2 is equipped with electricity meter No. n*2.

[0071] Specifically, meter #1 is connected to the outdoor unit of air conditioner unit #1, and meter #1 detects the power consumption of air conditioner unit #1; meter #2 is connected to the outdoor unit of air conditioner unit #2, and meter #2 detects the power consumption of air conditioner unit #2; ...; meter n*1 is connected to the outdoor unit of air conditioner unit n*1, and meter n*1 detects the power consumption of air conditioner unit n*1; meter n*2 is connected to air conditioner unit n*2, and meter n*2 detects the power consumption of air conditioner unit n*2.

[0072] The central air conditioning system adopts a distributed architecture. The air conditioning communication module and the electricity meter communication module are set in one device. The device only has the function of information collection. The control module can be integrated into the individual household billing information management platform.

[0073] The device collects air conditioner operation data and electricity meter data, and sends the collected data to the control module at certain intervals.

[0074] Generally, the control module is located on the individual billing information management platform, and the device communicates with the individual billing information management platform through a communication network.

[0075] The device periodically uploads the collected outdoor unit operating status and electricity meter data to the control module of the individual household billing information management platform. In other words, the device uploads the collected outdoor unit operating status and electricity meter data to the control module of the individual household billing information management platform according to a fixed upload cycle.

[0076] For example, the upload cycle is 1 hour.

[0077] The uploaded data includes, but is not limited to, upload time, outdoor unit operating status (start / stop status), and electricity meter data.

[0078] In order to detect the possibility of mismatch between the outdoor unit and the electricity meter as soon as possible, the control module makes a judgment based on the data in each upload cycle.

[0079] The storage module is used to store the matching relationship between the outdoor unit and the electricity meter.

[0080] Typically, the matching relationship between the outdoor unit and the electricity meter is stored in a list format.

[0081] like Figure 3 As shown, the matching relationship between the outdoor unit and the electricity meter is achieved through communication addresses. The electricity meter address corresponding to outdoor unit 1 is 1234, and the address corresponding to outdoor unit 2 is 4321.

[0082] Specific matching methods can be:

[0083] (1) After the hardware wiring is completed, manually setting the address for matching has a high probability of error.

[0084] (2) Establish rules for automatic matching so that manual matching is not required. However, when setting the meter address on site, there is a possibility that the set information may not match the actual installation information.

[0085] In all of the above situations, there is a probability of an incorrect matching relationship between the outdoor unit and the electricity meter. This application aims to automatically identify and detect situations where the outdoor unit and the electricity meter are incorrectly matched during the commissioning or operation of the air conditioning system, and issue a prompt to remind relevant personnel to handle the issue.

[0086] The storage module is used to store the correspondence between the outdoor unit's operating time and the normal power consumption range of the outdoor unit.

[0087] The outdoor unit's operating time and normal power consumption range are predetermined.

[0088] Since the matching relationship between the outdoor unit and the electricity meter is determined in each upload cycle, the outdoor unit's operating time is shorter than the upload cycle.

[0089] The normal power consumption range of the outdoor unit mainly refers to the upper limit and lower limit of normal power consumption corresponding to the outdoor unit's operating time.

[0090] The upper limit of normal power consumption corresponding to the outdoor unit's operating time refers to the power consumption of the outdoor unit calculated at its highest input power during the outdoor unit's operating time under standard operating conditions, which is the maximum power consumption when the air conditioning unit is operating normally and all indoor units are working.

[0091] The maximum normal power consumption corresponding to the outdoor unit's operating time = maximum input power * outdoor unit operating time.

[0092] Of course, the upper limit of normal power consumption corresponding to the outdoor unit's operating time can also be determined in advance through experiments.

[0093] The lower limit of normal power consumption corresponding to the outdoor unit's operating time refers to the power consumption of the outdoor unit calculated with the lowest input power during the outdoor unit's operating time under standard operating conditions, which is also the minimum power consumption of the air conditioning unit when it is working normally.

[0094] The minimum normal power consumption corresponding to the outdoor unit's operating time = minimum input power * outdoor unit operating time.

[0095] Of course, the lower limit of normal power consumption corresponding to the outdoor unit's operating time can also be determined in advance through experiments.

[0096] exist Figure 4 In the example, the outdoor unit running time t corresponds to the upper limit value Qmax and the lower limit value Qmin of the outdoor unit's normal power consumption for that running time.

[0097] The control module is configured to: acquire meter data and outdoor unit operating status within a specific time period, calculate the meter's power consumption and the outdoor unit's cumulative operating time within that specific time period, and determine if the matching relationship between the outdoor unit and the meter is incorrect when the cumulative operating time of the outdoor unit has not reached the outdoor unit's operating time limit, or when the power consumption of the meter matched with the outdoor unit exceeds the normal power consumption limit corresponding to the outdoor unit's operating time; or when the cumulative operating time of the outdoor unit exceeds the outdoor unit's operating time limit, or when the power consumption of the meter matched with the outdoor unit has not reached the normal power consumption limit corresponding to the outdoor unit's operating time.

[0098] In practical applications, the specific time generally refers to the upload cycle T mentioned above. In each upload cycle T, the outdoor unit and the electricity meter are matched to detect any mismatch as early as possible.

[0099] The control module acquires the electricity meter data and the outdoor unit's operating status within the upload period T.

[0100] The control module calculates the electricity consumption Q of the meter within the upload period T based on the meter data.

[0101] The electricity consumption Q of the meter within the upload period T is equal to the difference between the meter data at the end of the upload period T and the meter data at the start of the upload period T.

[0102] During the upload period T, the outdoor unit may be running continuously, or it may be not running at all, or it may be running for a period of time and then stopping, or it may be stopping for a period of time and then running continuously, or it may be alternating between running and stopping.

[0103] The control module calculates the cumulative operating time tl of the outdoor unit within the upload period T based on the outdoor unit's operating status. The cumulative operating time tl of the outdoor unit within the upload period T refers to the sum of all the time the outdoor unit is in operation within the upload period.

[0104] For example, if the outdoor unit runs for 10 minutes, stops for 30 minutes, and runs for 20 minutes within a 1-hour upload cycle, the control module calculates the cumulative running time tl of the outdoor unit within the upload cycle as 10 minutes + 20 minutes = 30 minutes.

[0105] The control module determines the relationship between the cumulative outdoor unit running time tl and the outdoor unit running time t stored in the storage module. When the cumulative outdoor unit running time tl is less than the outdoor unit running time t stored in the storage module, the power consumption Q of the meter matched with the outdoor unit is compared with the normal power consumption upper limit Qmax corresponding to the outdoor unit running time to determine whether the matching relationship between the outdoor unit and the meter is incorrect. When the cumulative outdoor unit running time tl exceeds the outdoor unit running time t stored in the storage module, the power consumption Q of the meter matched with the outdoor unit is compared with the normal power consumption lower limit Qmin corresponding to the outdoor unit running time to determine whether the matching relationship between the outdoor unit and the meter is incorrect.

[0106] Specifically, if the cumulative operating time tl of the outdoor unit does not reach the outdoor unit operating time t stored in the storage module, and the power consumption Q of the meter matched with the outdoor unit exceeds the upper limit of normal power consumption Qmax corresponding to the outdoor unit operating time t, it indicates that the outdoor unit's power consumption is higher than the upper limit of the normal power consumption range for the outdoor unit operating time within a short operating period that is less than the outdoor unit operating time. This is illogical, and the matching relationship between the outdoor unit and the meter is judged to be incorrect, resulting in an error message. Similarly, if the cumulative operating time tl of the outdoor unit exceeds the outdoor unit operating time t stored in the storage module, and the power consumption Q of the meter matched with the outdoor unit does not reach the lower limit of normal power consumption Qmin corresponding to the outdoor unit operating time t, it indicates that the outdoor unit's power consumption is lower than the lower limit of the normal power consumption range for the outdoor unit operating time within a longer operating period that exceeds the outdoor unit operating time. This is illogical, and the matching relationship between the outdoor unit and the meter is judged to be incorrect, resulting in an error message.

[0107] For example, the storage module stores the outdoor unit's operating time of 20 minutes and the normal power consumption range of [0.16, 2] kWh.

[0108] Within a 1-hour upload period, the outdoor unit's cumulative operating time is 30 minutes, and the power consumption of the meter matched with the outdoor unit is 0.1 kWh. This indicates that the cumulative operating time of the outdoor unit exceeds the normal operating time, but the power consumption of the meter matched with the outdoor unit does not reach the normal power consumption lower limit corresponding to the outdoor unit's operating time. Therefore, the matching relationship between the outdoor unit and the meter is judged to be incorrect.

[0109] Within a 1-hour upload period, the outdoor unit's cumulative operating time was 10 minutes, and the power consumption of the meter matched with the outdoor unit was 2.1 kWh. This indicates that the outdoor unit's cumulative operating time has not reached the required operating time, but the power consumption of the meter matched with the outdoor unit exceeds the normal power consumption limit corresponding to the outdoor unit's operating time. Therefore, the matching relationship between the outdoor unit and the meter is determined to be incorrect.

[0110] The error message contains address information for the outdoor unit and electricity meter that are mismatched, which relevant personnel can check and adjust.

[0111] like Figure 5 As shown, the method for determining an error in the matching relationship between the outdoor unit and the electricity meter in a central air conditioning system is as follows:

[0112] S1, Begin.

[0113] S2. Collect the operating status of the outdoor unit and the electricity meter data and upload them periodically.

[0114] S3. Obtain the electricity meter data and outdoor unit operating status within the upload period, and calculate the electricity consumption of the electricity meter and the cumulative operating time of the outdoor unit within the upload period.

[0115] S4. Read the matching relationship between the outdoor unit and the electricity meter, and the correspondence between the outdoor unit's running time and the normal power consumption range of the outdoor unit.

[0116] S5. Determine whether the cumulative running time of the outdoor unit exceeds the outdoor unit's operating time. If yes, proceed to step S6; otherwise, proceed to step S9.

[0117] S6. Determine whether the power consumption of the electricity meter matched with the outdoor unit has not reached the lower limit of normal power consumption corresponding to the outdoor unit's operating time. If yes, proceed to step S7; otherwise, proceed to step S8.

[0118] S7. The matching relationship between the outdoor unit and the electricity meter is incorrect.

[0119] S8, End.

[0120] S9. Determine whether the power consumption of the electricity meter matched with the outdoor unit exceeds the upper limit of normal power consumption corresponding to the outdoor unit's operating time. If yes, proceed to step S7; otherwise, proceed to step S8.

[0121] Since the type and capacity of the outdoor unit have a significant impact on power consumption, the type and capacity of the outdoor unit are considered as influencing factors in determining the normal power consumption range.

[0122] The storage module is used to store the correspondence between the outdoor unit's operating time and the outdoor unit's model information and / or capacity information, as well as the normal power consumption range of the outdoor unit.

[0123] The outdoor unit's operating time and the normal power consumption range corresponding to the outdoor unit's model information and / or capacity information are predetermined.

[0124] exist Figure 6 In the example, the model information i includes 1, 2, 3, and 4, and the model capability j includes 6, 8, 10, and 12. The upper limit of the normal power consumption of the outdoor unit corresponding to the outdoor unit operating time t is Qmaxij, and the lower limit of the normal power consumption of the outdoor unit corresponding to the model information i and the model capability j is Qminij.

[0125] The control module is used to acquire the outdoor unit's model information i and / or capacity information j, and to determine whether the matching relationship between the outdoor unit and the meter is incorrect based on the relationship between the outdoor unit's cumulative running time tl and the outdoor unit's running time t, and the correspondence between the power consumption Q of the meter matched with the outdoor unit and the normal power consumption range of the outdoor unit corresponding to the outdoor unit's model information i and / or capacity information j.

[0126] The control module calculates the electricity consumption Q of the meter within the upload period T and the cumulative operating time tl of the outdoor unit within the upload period T. The control module obtains the outdoor unit's type information as i and its capacity as j. The control module determines the relationship between the cumulative operating time tl of the outdoor unit and the outdoor unit operating time t stored in the storage module. When the cumulative operating time tl of the outdoor unit does not reach the outdoor unit operating time t stored in the storage module, it compares the electricity consumption Q of the meter matched with the outdoor unit with the normal upper limit value Qmaxij corresponding to the outdoor unit's operating time for that type and capacity to determine whether the matching relationship between the outdoor unit and the meter is incorrect. When the cumulative operating time tl of the outdoor unit exceeds the outdoor unit operating time t stored in the storage module, it compares the electricity consumption Q of the meter matched with the outdoor unit with the normal lower limit value Qminij corresponding to the outdoor unit's operating time for that type and capacity to determine whether the matching relationship between the outdoor unit and the meter is incorrect.

[0127] Specifically, if the cumulative operating time tl of the outdoor unit does not reach the outdoor unit operating time t stored in the storage module, and the power consumption Q of the meter matched with the outdoor unit exceeds the upper limit of normal power consumption Qmaxij corresponding to the outdoor unit operating time t for that model and capacity, it indicates that the outdoor unit's power consumption is higher than the upper limit of the normal power consumption range for the outdoor unit operating time within a short operating period that is below the outdoor unit operating time, which is illogical. Therefore, the matching relationship between the outdoor unit and the meter is determined to be incorrect, and an error message is output. Similarly, if the cumulative operating time tl of the outdoor unit exceeds the outdoor unit operating time t stored in the storage module, and the power consumption Q of the meter matched with the outdoor unit does not reach the lower limit of normal power consumption Qminij corresponding to the outdoor unit operating time t for that model and capacity, it indicates that the outdoor unit's power consumption is lower than the lower limit of the normal power consumption range for the outdoor unit operating time within a longer operating period that exceeds the outdoor unit operating time, which is illogical. Therefore, the matching relationship between the outdoor unit and the meter is determined to be incorrect, and an error message is output.

[0128] The air conditioner communication module is used to receive outdoor unit model information and / or capacity information. The uploaded data includes, but is not limited to, upload time, outdoor unit operating status (start / stop status), electricity meter data, and outdoor unit model information and / or capacity information.

[0129] In some embodiments, the central air conditioning system includes an information input module for inputting outdoor unit type information and / or capacity information.

[0130] like Figure 7 As shown, the method for determining an error in the matching relationship between the outdoor unit and the electricity meter in a central air conditioning system is as follows:

[0131] S1, Begin.

[0132] S2. Collect the operating status of the outdoor unit and the electricity meter data and upload them periodically.

[0133] S3. Obtain the electricity meter data and outdoor unit operating status within the upload period, calculate the electricity consumption of the electricity meter and the cumulative operating time of the outdoor unit within the upload period, and obtain the outdoor unit's type information and capacity information.

[0134] S4. Read the matching relationship between the outdoor unit and the electricity meter, and the correspondence between the outdoor unit's running time and the outdoor unit's model information and capacity information, corresponding to the normal power consumption range of the outdoor unit.

[0135] S5. Determine whether the cumulative running time of the outdoor unit exceeds the outdoor unit's operating time. If yes, proceed to step S6; otherwise, proceed to step S9.

[0136] S6. Determine whether the power consumption of the electricity meter matched with the outdoor unit has not reached the normal power consumption lower limit corresponding to the outdoor unit's operating time for this model and capacity. If yes, proceed to step S7; otherwise, proceed to step S8.

[0137] S7. The matching relationship between the outdoor unit and the electricity meter is incorrect.

[0138] S8, End.

[0139] S9. Determine whether the power consumption of the electricity meter matched with the outdoor unit exceeds the normal power consumption limit corresponding to the outdoor unit's operating time for this type of unit. If yes, proceed to step S7; otherwise, proceed to step S8.

[0140] In some embodiments, to improve the accuracy of judgment, different operating times are set for the outdoor unit operating time stored in the storage module. When the operating time is short, it is compared with the upper limit of normal power consumption for a shorter time, and when the operating time is long, it is compared with the lower limit of normal power consumption.

[0141] The storage module stores the outdoor unit's first operating time and the upper limit of normal power consumption during the first operating time, as well as the outdoor unit's second operating time and the lower limit of normal power consumption during the second operating time, with the second operating time being longer than the first operating time.

[0142] exist Figure 8 In the example, the outdoor unit operates for the first time t1, which corresponds to the upper limit of the normal power consumption of the outdoor unit at the first time t1; the outdoor unit operates for the second time t2, which corresponds to the lower limit of the normal power consumption of the outdoor unit at the second time t2, which is longer than the first time t1.

[0143] The control module determines the relationship between the cumulative operating time tl of the outdoor unit and the first time t1 and the second time t2 of the outdoor unit's operating time stored in the storage module. When the cumulative operating time tl of the outdoor unit has not reached the first operating time t1 stored in the storage module, the power consumption Q1 of the meter matched with the outdoor unit is compared with the normal power consumption upper limit value Qmax1 corresponding to the first time t1 to determine whether the matching relationship between the outdoor unit and the meter is incorrect. When the cumulative operating time tl of the outdoor unit exceeds the second operating time t2 stored in the storage module, the power consumption Q2 of the meter matched with the outdoor unit is compared with the normal power consumption lower limit value Qmin2 corresponding to the second time t2 to determine whether the matching relationship between the outdoor unit and the meter is incorrect.

[0144] The control module is configured to determine that the matching relationship between the outdoor unit and the meter is incorrect when the cumulative running time tl of the outdoor unit has not reached the first time t1 and the power consumption Q1 of the meter matched with the outdoor unit exceeds the upper limit of normal power consumption Qmax1 of the first time; or when the cumulative running time tl of the outdoor unit has exceeded the second time t2 and the power consumption Q2 of the meter matched with the outdoor unit has not reached the lower limit of normal power consumption Qmin2 of the second time.

[0145] Specifically, if the cumulative operating time tl of the outdoor unit has not reached the first time t1 stored in the storage module, and the power consumption Q1 of the meter matched with the outdoor unit exceeds the upper limit of normal power consumption Qmax1 corresponding to the first time t1, it indicates that the power consumption of the outdoor unit is higher than the upper limit of the normal power consumption range for the outdoor unit's operating time within a short operating period that has not yet reached the outdoor unit's operating time. This is illogical, and the matching relationship between the outdoor unit and the meter is judged to be incorrect, resulting in an error message. Similarly, if the cumulative operating time tl of the outdoor unit exceeds the second time t2 stored in the storage module, and the power consumption Q2 of the meter matched with the outdoor unit has not reached the lower limit of normal power consumption Qmin2 corresponding to the second time t2, it indicates that the power consumption of the outdoor unit is lower than the lower limit of the normal power consumption range for the outdoor unit's operating time within a longer operating period that has already exceeded the outdoor unit's operating time. This is illogical, and the matching relationship between the outdoor unit and the meter is judged to be incorrect, resulting in an error message.

[0146] For example, the storage module stores data for a first time t1 of 20 minutes, and the upper limit of normal power consumption of the outdoor unit Qmax1 at the first time t1 is 2kWh; the storage module stores data for a second time t2 of 40 minutes, and the lower limit of normal power consumption of the outdoor unit Qmin1 at the second time t2 is 1.2kWh.

[0147] Within a 1-hour upload period, the outdoor unit's cumulative operating time is 50 minutes, and the power consumption of the meter matched with the outdoor unit is 0.1 kWh. This indicates that the outdoor unit's cumulative operating time exceeds the second operating time of 40 minutes, and the power consumption of the meter matched with the outdoor unit is 0.1 kWh, which does not reach the normal power consumption lower limit of 1.2 kWh corresponding to the outdoor unit's operating time. Therefore, it is determined that the matching relationship between the outdoor unit and the meter is incorrect.

[0148] Within a 1-hour upload period, the outdoor unit's cumulative operating time was 10 minutes, and the power consumption of the meter matched with the outdoor unit was 2.1 kWh. This indicates that the cumulative operating time of the outdoor unit has not reached the required operating time, and the power consumption of 2.1 kWh in the meter matched with the outdoor unit exceeds the normal power consumption limit of 2 kWh corresponding to the outdoor unit's operating time. Therefore, it is determined that the matching relationship between the outdoor unit and the meter is incorrect.

[0149] like Figure 9 As shown, the method for determining an error in the matching relationship between the outdoor unit and the electricity meter in a central air conditioning system is as follows:

[0150] S1, Begin.

[0151] S2. Collect the operating status of the outdoor unit and the electricity meter data and upload them periodically.

[0152] S3. Obtain the electricity meter data and outdoor unit operating status within the upload period, and calculate the electricity consumption of the electricity meter and the cumulative operating time of the outdoor unit within the upload period.

[0153] S4. Read the matching relationship between the outdoor unit and the electricity meter, and the correspondence between the outdoor unit's first operating time and the upper limit of the outdoor unit's normal power consumption, and the second operating time and the lower limit of the outdoor unit's normal power consumption.

[0154] S5. Determine whether the cumulative running time of the outdoor unit exceeds the second time. If yes, proceed to step S6; otherwise, proceed to step S9.

[0155] S6. Determine whether the power consumption of the electricity meter matched with the outdoor unit has not reached the normal power consumption lower limit corresponding to the second time. If yes, proceed to step S7; otherwise, proceed to step S8.

[0156] S7. The matching relationship between the outdoor unit and the electricity meter was incorrect.

[0157] S8, End.

[0158] S9. Determine whether the power consumption of the electricity meter matched with the outdoor unit exceeds the upper limit of normal power consumption corresponding to the first time. If yes, proceed to step S7; otherwise, proceed to step S8.

[0159] In some embodiments, the control module is configured to determine that the matching relationship between the outdoor unit and the electricity meter is incorrect when the cumulative running time of the outdoor unit is zero and the power consumption of the electricity meter matched with the outdoor unit exceeds the normal power consumption limit corresponding to the zero running time of the outdoor unit.

[0160] The upper limit of normal power consumption corresponding to zero outdoor unit operating time is determined based on the input power of the outdoor unit compressor electric heating belt and the specific time.

[0161] When the outdoor unit is not running, only the compressor electric heating element consumes power. Therefore, the upper limit of normal power consumption at this time is the input power of the compressor electric heating element multiplied by a specific time (upload cycle).

[0162] Of course, the lower limit of normal power consumption corresponding to zero outdoor unit operating time can also be determined in advance through experiments.

[0163] Since the type and capacity of the outdoor unit have a significant impact on power consumption, the type and capacity of the outdoor unit are considered as influencing factors in determining the normal power consumption range.

[0164] The storage module is used to store the correspondence between the outdoor unit's operating time and the outdoor unit's model information and / or capacity information, as well as the normal power consumption range of the outdoor unit.

[0165] The outdoor unit's operating time and the normal power consumption range corresponding to the outdoor unit's model information and / or capacity information are predetermined.

[0166] exist Figure 10 In the example, the model information i includes 1, 2, 3, and 4, and the model capability j includes 6, 8, 10, and 12. The upper limit of the normal power consumption of the outdoor unit corresponding to the first time t1 of outdoor unit operation is Qmax1ij, and the lower limit of the normal power consumption of the outdoor unit corresponding to the second time t2 of outdoor unit operation is Qmin2ij. The second time t2 is longer than the first time t1.

[0167] The control module is used to acquire the outdoor unit's model information i and / or capacity information j. Based on the relationship between the outdoor unit's cumulative running time tl and the outdoor unit's first running time t1 and second running time t2, and the correspondence between the power consumption Q of the meter matched with the outdoor unit and the outdoor unit's normal power consumption upper limit Qmax1ij and lower limit Qmin2ij corresponding to the outdoor unit's model information and / or capacity information, it determines whether the matching relationship between the outdoor unit and the meter is incorrect.

[0168] The control module calculates the electricity consumption Q of the meter within the upload period T and the cumulative operating time tl of the outdoor unit within the upload period T. The control module obtains the outdoor unit's model information as i and its capacity as j. The control module determines the relationship between the cumulative operating time tl of the outdoor unit and the first and second operating times t1 and t2 of the outdoor unit stored in the storage module. When the cumulative operating time tl of the outdoor unit does not reach the first operating time t1 stored in the storage module, the control module compares the electricity consumption Q of the meter matched with the outdoor unit with the upper limit of normal electricity consumption Qmax1ij corresponding to the outdoor unit's operating time to determine whether the matching relationship between the outdoor unit and the meter is incorrect. When the cumulative operating time tl of the outdoor unit exceeds the second operating time t2 stored in the storage module, the control module compares the electricity consumption Q of the meter matched with the lower limit of normal electricity consumption Qmin2ij corresponding to the outdoor unit's operating time to determine whether the matching relationship between the outdoor unit and the meter is incorrect.

[0169] Specifically, if the cumulative operating time tl of the outdoor unit has not reached the first operating time t1 stored in the storage module, and the power consumption Q of the meter matched with the outdoor unit exceeds the upper limit of normal power consumption Qmax1ij corresponding to the first operating time t1, it indicates that the power consumption detected by the meter is higher than the upper limit of normal power consumption of the air conditioning unit, which is illogical. Therefore, the matching relationship between the outdoor unit and the meter is determined to be incorrect, and an error message is output. Similarly, if the cumulative operating time tl of the outdoor unit has exceeded the second operating time t2 stored in the storage module, and the power consumption Q of the meter matched with the outdoor unit has not reached the lower limit of normal power consumption Qmin2ij corresponding to the second operating time t2, it indicates that the power consumption detected by the meter is lower than the lower limit of normal power consumption of the air conditioning unit, which is illogical. Therefore, the matching relationship between the outdoor unit and the meter is determined to be incorrect, and an error message is output.

[0170] like Figure 11 As shown, the method for determining an error in the matching relationship between the outdoor unit and the electricity meter in a central air conditioning system is as follows:

[0171] S1, Begin.

[0172] S2. Collect the operating status of the outdoor unit and the electricity meter data and upload them periodically.

[0173] S3. Obtain the electricity meter data and outdoor unit operating status within the upload period, calculate the electricity consumption of the electricity meter and the cumulative operating time of the outdoor unit within the upload period, and obtain the outdoor unit's type information and capacity information.

[0174] S4. Read the matching relationship between the outdoor unit and the electricity meter. The first time the outdoor unit is running, the relationship between the outdoor unit's model information and capacity information and the corresponding upper limit of the outdoor unit's normal power consumption, and the second time, the relationship between the outdoor unit's normal power consumption and the lower limit of the outdoor unit's normal power consumption.

[0175] S5. Determine whether the cumulative running time of the outdoor unit exceeds the second running time of the outdoor unit. If yes, proceed to step S6; otherwise, proceed to step S9.

[0176] S6. Determine whether the power consumption of the electricity meter matched with the outdoor unit has not reached the normal power consumption lower limit corresponding to the second operating time of the outdoor unit of this model and capacity. If yes, proceed to step S7; otherwise, proceed to step S8.

[0177] S7. The matching relationship between the outdoor unit and the electricity meter was incorrect.

[0178] S8, End.

[0179] S9. Determine whether the power consumption of the electricity meter matched with the outdoor unit exceeds the normal power consumption limit corresponding to the outdoor unit's operating time for this type of unit. If yes, proceed to step S7; otherwise, proceed to step S8.

[0180] The control module is configured to output a prompt when it detects an error in the matching relationship between the outdoor unit and the electricity meter. The duration of the prompt is the set reminder time. For example, the reminder time can be set to 24 hours.

[0181] The control module is configured to extend the duration of the alert if the matching relationship between the outdoor unit and the electricity meter is found to be incorrect again within a set reminder time, so as to facilitate the handling by the staff.

[0182] In some embodiments, the central air conditioning system includes a marking input module for marking outdoor units and electricity meters with incorrect matching relationships. The control module is configured to stop determining whether the matching relationship between the outdoor unit and the electricity meter is incorrect before modifying the marked matching relationship, thereby reducing the system's computational load.

[0183] Therefore, this application can automatically identify and determine whether the matching relationship between the outdoor unit and the electricity meter is incorrect and remind relevant personnel to handle it, so as to avoid errors in the power consumption statistics of the outdoor unit and further avoid errors in the power allocation of the indoor unit.

[0184] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0185] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A central air conditioning system, comprising: The air conditioner communication module is used to receive the operating status of the outdoor unit; The electricity meter communication module is used to receive electricity meter data; The electricity meter is connected to the outdoor unit; Its characteristic is that it further includes: The storage module is used to store the matching relationship between the outdoor unit and the electricity meter, and the correspondence between the outdoor unit's operating time and the normal power consumption range of the outdoor unit. The control module is configured to: acquire meter data and outdoor unit operating status within a specific time period; calculate the power consumption of the meter and the cumulative operating time of the outdoor unit within the specific time period; and determine that the matching relationship between the outdoor unit and the meter is incorrect when the cumulative operating time of the outdoor unit does not reach the outdoor unit operating time and the power consumption of the meter matched with the outdoor unit exceeds the upper limit of normal power consumption corresponding to the outdoor unit operating time, or when the cumulative operating time of the outdoor unit exceeds the outdoor unit operating time and the power consumption of the meter matched with the outdoor unit does not reach the lower limit of normal power consumption corresponding to the outdoor unit operating time.

2. The central air conditioning system according to claim 1, characterized in that, The storage module stores the outdoor unit's first operating time and the upper limit of normal power consumption during the first operating time, as well as the outdoor unit's second operating time and the lower limit of normal power consumption during the second operating time. The control module is configured to determine that the matching relationship between the outdoor unit and the electricity meter is incorrect when the cumulative operating time of the outdoor unit has not reached a first time and the power consumption of the electricity meter matched with the outdoor unit exceeds the normal power consumption limit of the first time, or when the cumulative operating time of the outdoor unit has exceeded a second time and the power consumption of the electricity meter matched with the outdoor unit has not reached the normal power consumption limit of the second time; wherein the second time is longer than the first time.

3. The central air conditioning system according to claim 2, characterized in that, The control module is configured to determine that the matching relationship between the outdoor unit and the electricity meter is incorrect when the cumulative running time of the outdoor unit is zero and the power consumption of the electricity meter matched with the outdoor unit exceeds the normal power consumption limit corresponding to the zero running time of the outdoor unit.

4. The central air conditioning system according to claim 3, characterized in that, The upper limit of normal power consumption corresponding to zero outdoor unit operating time is determined based on the input power of the outdoor unit compressor electric heating belt and a specific time.

5. The central air conditioning system according to claim 1, characterized in that, The control module is configured to output a prompt when it determines that the matching relationship between the outdoor unit and the electricity meter is incorrect, and the duration of the prompt is a set reminder time.

6. The central air conditioning system according to claim 5, characterized in that, The control module is configured to extend the duration of the reminder if, within a set reminder time, it is determined again that the matching relationship between the outdoor unit and the electricity meter is incorrect.

7. The central air conditioning system according to claim 1, characterized in that, The central air conditioning system includes: A marking input module is used to mark the outdoor unit and the electricity meter that are determined to have an incorrect matching relationship; The control module is configured to not determine whether the matching relationship between the outdoor unit and the electricity meter is incorrect before modifying the marked matching relationship between the outdoor unit and the electricity meter.

8. The central air conditioning system according to claim 1, characterized in that, The air conditioning communication module is used to receive the operating status of the indoor unit. The control module is configured to determine the operating status of the outdoor unit based on the operating status of the corresponding indoor unit when the operating status of the outdoor unit cannot be obtained. If at least one indoor unit is running, the outdoor unit is considered to be running. If all indoor units are not running, the outdoor unit is considered to be not running.

9. The central air conditioning system according to any one of claims 1-8, characterized in that, The storage module is used to store the correspondence between the outdoor unit's operating time and the outdoor unit's model information and / or capacity information, and the corresponding normal power consumption range of the outdoor unit. The control module is used to acquire the model information and / or capacity information of the outdoor unit, and to determine whether the matching relationship between the outdoor unit and the electricity meter is incorrect based on the relationship between the cumulative running time of the outdoor unit and the running time of the outdoor unit, and the correspondence between the power consumption of the electricity meter matched with the outdoor unit and the normal power consumption range of the outdoor unit corresponding to the model information and / or capacity information of the outdoor unit.

10. The central air conditioning system according to claim 9, characterized in that, The air conditioning communication module is used to receive the model information and / or capacity information of the outdoor unit; or, the central air conditioning system includes an information input module, which is used to input the model information and / or capacity information of the outdoor unit.

Images