A central air conditioning system

Abstract

The present invention discloses a central air-conditioning system. An air-conditioning communication module is used to receive the operating status of an indoor unit; a power meter communication module is used to receive power meter data at regular intervals, and the power meter is used to detect the power consumption of an outdoor unit; a control module is configured to divide, according to whether the power meter data received by the power meter communication module at the start time and the end time of a power consumption sharing period is normal, into a complete period and an incomplete period; when there is historical power consumption during the period of the incomplete period and the historical power consumption and the power consumption of the incomplete period meet the correction condition, the historical power consumption is used as the power consumption of the power consumption sharing period. Since the user's electricity consumption habits are basically unchanged, therefore, during the incomplete period, the historical power consumption of the complete period in the same time period is used to replace the power consumption of the incomplete period, so that the power consumption of the power consumption sharing period is as close as possible to the actual power consumption, and the accuracy of the outdoor power consumption when the power meter data is missing is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of central air conditioners, and in particular to a central air conditioner system capable of sharing the power consumption of multiple indoor units of a central air conditioner. Background Art

[0002] Existing multi-connected central air conditioners generally adopt a household-by-household billing function. The power consumption of the outdoor unit of the multi-connected central air conditioner is measured by an electric meter. The household-by-household billing system communicates with the electric meter and receives the electric meter data as the basis for statistical outdoor unit power consumption. According to the outdoor unit power consumption and the operating status of the indoor unit, the power consumption is allocated to the indoor unit to achieve household-by-household billing. However, in the actual use process, the electric meter may be accidentally offline, resulting in the loss of received electric meter data, inaccurate outdoor unit power consumption, and further affecting the accuracy of the power consumption allocation of the household-by-household billing system.

[0003] The above information disclosed in this background art is only used to increase the understanding of the background art of the present application. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Invention

[0004] The present invention provides a central air conditioner system, which solves the technical problem that the calculated power consumption of the outdoor unit is inaccurate when the existing central air conditioner system fails to receive the electric meter data.

[0005] To achieve the above invention purpose, the present invention adopts the following technical solutions:

[0006] In some embodiments of the present application, a central air conditioner system is provided:

[0007] It includes a plurality of outdoor units and indoor units, and further includes:

[0008] An air conditioner communication module for receiving the operating status of the indoor unit;

[0009] An electric meter communication module for regularly receiving electric meter data, and the electric meter is used to detect the power consumption of the outdoor unit;

[0010] The control module is configured to: record a cycle in which the electricity meter data is received normally at both the start time and the end time of the electricity consumption sharing cycle as a complete cycle, and record a cycle in which the electricity meter data is received failed at least at the start time or the end time as an incomplete cycle; calculate the electricity consumption of the complete cycle as the electricity consumption of the electricity consumption sharing cycle, and record the electricity consumption of the complete cycle as the historical electricity consumption of the time period where the complete cycle is located; calculate the electricity consumption of the incomplete cycle, and when there is historical electricity consumption in the time period where the incomplete cycle is located and the historical electricity consumption and the electricity consumption of the incomplete cycle meet the correction condition, use the historical electricity consumption as the electricity consumption of the electricity consumption sharing cycle, otherwise use the electricity consumption of the incomplete cycle as the electricity consumption of the electricity consumption sharing cycle.

[0011] In some embodiments, the control module is configured to calculate the average historical electricity consumption of at least two historical electricity consumptions when there are at least two historical electricity consumptions in the time period where the incomplete cycle is located; when the average historical electricity consumption is greater than the electricity consumption of the incomplete cycle, use the average historical electricity consumption as the electricity consumption of the electricity consumption sharing cycle to improve the accuracy of the electricity consumption of the electricity consumption sharing cycle.

[0012] In some embodiments, the control module is configured to, within a specific time period when the electricity meter data is received failed, count the number of times the air conditioner communication module receives the operating state of the outdoor unit, and calculate the electricity consumption of the incomplete cycle when the obtained number of times exceeds the preset number of times, otherwise, determine that the central air-conditioning system is powered off.

[0013] In some embodiments, the correction condition is that the historical electricity consumption is greater than the electricity consumption of the incomplete cycle.

[0014] In some embodiments, the control module is configured to calculate the electricity consumption of the complete cycle according to the electricity meter data received by the electricity meter communication module at the start time and the end time of the complete cycle, and the electricity consumption of the complete cycle is equal to the difference between the electricity meter data received at the end time and the electricity meter data received at the start time; the control module is configured to calculate the electricity consumption of the incomplete cycle according to the electricity meter data received for the first time and the last time by the electricity meter communication module within the incomplete cycle, and the electricity consumption of the incomplete cycle is equal to the difference between the electricity meter data received at the last time and the electricity meter data received at the first time.

[0015] In some embodiments, the control module is configured to issue a prompt when the electricity meter data is received failed or the number of consecutive times of receiving the electricity meter data failed exceeds the set number of times.

[0016] In some embodiments, the control module is configured to include a correction period, the correction period including a plurality of power sharing periods. When the meter communication module receives the meter data normally at the start time and the end time of the correction period and there is an incomplete period among the power sharing periods included in the correction period, the power consumption of the correction period is calculated based on the meter data received at the start time and the end time of the correction period, and the power consumption of the incomplete period is secondarily corrected according to the power consumption of the correction period; when the meter communication module fails to receive the meter data at the start time or the end time of the correction period, the power consumption of the power sharing period is not corrected.

[0017] In some embodiments, the control module is configured to calculate the sum of the power consumption of all the power sharing periods within the correction period, and allocate the difference between the power consumption of the correction period and the sum of the power consumption of all the power sharing periods within the correction period to the power consumption of the incomplete period.

[0018] In some embodiments, the control module is configured to: calculate the sum of the power consumption of the incomplete periods within the correction period, and calculate the compensation coefficient of the incomplete period = power consumption of the incomplete period / sum of the power consumption of the incomplete periods within the correction period;

[0019] When the power consumption of the correction period and the sum of the power consumption of all the power sharing periods within the correction period meet the decrement correction condition, the corrected power consumption of the incomplete period = power consumption of the incomplete period - ((sum of the power consumption of all the power sharing periods within the correction period - power consumption of the correction period) * compensation coefficient of the incomplete period);

[0020] When the power consumption of the correction period and the sum of the power consumption of all the power sharing periods within the correction period meet the increment correction condition, the corrected power consumption of the incomplete period = power consumption of the incomplete period + ((power consumption of the correction period - sum of the power consumption of all the power sharing periods within the correction period) * compensation coefficient of the incomplete period).

[0021] In some embodiments, the decrement correction condition is that the power consumption of the correction period is less than the sum of the power consumption of all the power sharing periods within the correction period; the increment correction condition is that the power consumption of the correction period is greater than the sum of the power consumption of all the power sharing periods within the correction period.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The central air-conditioning system of the present invention includes an outdoor unit, an indoor unit, an air-conditioning communication module, a power meter communication module, and a control module. The outdoor unit corresponds to multiple indoor units. The air-conditioning communication module is used to receive the operating status of the indoor units; the power meter communication module is used to regularly receive power meter data, and the power meter is used to detect the power consumption of the outdoor unit; the control module is configured to: record the period in which the power meter communication module receives the power meter data normally at the start time and the end time of the power consumption sharing period as a complete period, and record the period in which at least the start time or the end time fails to receive the power meter data as an incomplete period; calculate the power consumption of the complete period as the power consumption of the power consumption sharing period, and record the power consumption of the complete period as the historical power consumption of the time period where the complete period is located; calculate the power consumption of the incomplete period. When there is historical power consumption in the time period where the incomplete period is located and the historical power consumption and the power consumption of the incomplete period meet the correction condition, use the historical power consumption as the power consumption of the power consumption sharing period, otherwise use the power consumption of the incomplete period as the power consumption of the power consumption sharing period. When there is historical power consumption in the time period where the incomplete period with missing power meter data is located and the historical power consumption and the power consumption of the incomplete period meet the correction condition, the present invention uses the historical power consumption as the power consumption of the power consumption sharing period to correct the situation of missing power meter data. Since the user's electricity consumption habits are basically unchanged, therefore, using the historical power consumption of the complete period in the same time period to replace the power consumption of the incomplete period makes the power consumption of the power consumption sharing period as close as possible to the actual power consumption, and improves the accuracy of the outdoor power consumption when the power meter data is missing.

[0023] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a principle block diagram of a specific embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of the distributed architecture of a specific embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the distributed architecture of another specific embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the corresponding relationship between the outdoor unit address, indoor unit address, and power meter address in a specific embodiment of the present invention;

[0029] Figure 5 This is the timing diagram of the meter communication module receiving meter data in a specific embodiment of the present invention;

[0030] Figure 6 This is the diagram showing the correspondence between historical power consumption and time periods in a specific embodiment of the present invention;

[0031] Figures 7 - 8 This is the flowchart of a specific embodiment of the present invention;

[0032] Figure 9 This is the timing diagram of the correction period in a specific embodiment of the present invention;

[0033] Figure 10 This is the flowchart reference numerals of a specific embodiment of the present invention. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0036] The terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "plurality" is two or more.

[0037] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0039] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0040] The central air-conditioning system provided in the present application includes several air-conditioning units. The number of air-conditioning units 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.

[0041] The air-conditioning unit performs the refrigerant cycle of the air-conditioning system by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigerant cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0042] The low-temperature and low-pressure refrigerant enters the compressor, and the compressor compresses it into a refrigerant gas in a high-temperature and high-pressure state 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.

[0043] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state formed by condensation in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant for heat exchange with the material to be cooled. Throughout the cycle, the air-conditioning unit can adjust the temperature of the indoor space.

[0044] The outdoor unit of the air-conditioning unit refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger. The indoor unit of the air-conditioning unit includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0045] The indoor heat exchanger and the outdoor heat exchanger are used as condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air-conditioning unit serves as a heater in the heating mode. When the indoor heat exchanger is used as an evaporator, the air-conditioning unit serves as a cooler in the cooling mode.

[0046] As Figure 1 shown, the central air-conditioning system further includes an air-conditioning communication module, a power meter communication module, and a control module.

[0047] The air-conditioning communication module communicates with the air-conditioning unit, obtains air-conditioning unit information, and sends it to the control module.

[0048] The power meter communication module communicates with the power meter, obtains power meter information, and sends it to the control module.

[0049] The control module calculates the power consumption of the air-conditioning unit based on the air-conditioning unit information and the power meter information, and further apportions the power consumption to the indoor units included in the air-conditioning unit.

[0050] The central air-conditioning system can include only one air-conditioning unit or multiple air-conditioning units.

[0051] In Figure 2 the example shown, the central air-conditioning includes multiple air-conditioning units. The air-conditioning communication module, the power meter communication module, and some control module functions are set in a power consumption apportionment device. One power consumption apportionment device is connected and communicates with at least one air-conditioning unit and one power meter. The power consumption apportionment device also communicates with the household billing information management platform, and some control module functions are set in the household billing information management platform.

[0052] The central air-conditioning system adopts a distributed architecture. The power consumption sharing device collects the operation data of the air conditioners and the data of the electricity meters, and performs a power consumption sharing calculation for the air conditioner units at a certain period, and distributes the power consumption to each indoor unit of the air conditioner units. The primary task of performing the power consumption sharing calculation is to determine the power consumption of the air conditioner units within the power consumption sharing period, and then distribute the power consumption to each indoor unit of the air conditioner units. The power consumption sharing device also regularly transmits the collected data and calculation results to the household billing information management platform. The control module of the platform can also perform secondary power consumption correction according to the billing period (correction period) of the generated bill to obtain better-accuracy power consumption, and then perform a power consumption sharing calculation to further improve the accuracy of the power consumption sharing.

[0053] In Figure 3 the shown example, the central air-conditioning includes multiple air conditioner units. The air-conditioning communication module and the electricity meter communication module are set in one device, and the device only has the function of information collection. The control module can be integrally integrated on the household billing information management platform.

[0054] The following is a specific description of the air-conditioning communication module, the electricity meter communication module, and the control module:

[0055] The air-conditioning communication module is used to communicate with the air conditioner units and receive the operation status of the indoor units and the outdoor units.

[0056] The air-conditioning communication module is used to communicate with the air conditioner units regularly.

[0057] Generally, the air-conditioning communication module communicates with the air conditioner units at the first communication period.

[0058] The first communication period is determined by the number of outdoor units and indoor units of the air-conditioning system.

[0059] Generally, the first communication period is determined according to the number of outdoor units and indoor units, ranging from dozens of seconds to several minutes.

[0060] The outdoor unit is connected to an electricity meter, and the electricity meter is used to detect the power consumption of the outdoor unit.

[0061] Generally, one outdoor unit is connected to one electricity meter.

[0062] As Figure 4 shown, it is a schematic diagram of the corresponding relationship between the outdoor unit addresses, indoor unit addresses, and electricity meter addresses of two air conditioner units.

[0063] In Figure 4 it, the electricity meter address corresponding to the outdoor unit of the No. 1 air conditioner unit is 1234, and the electricity meter address corresponding to the outdoor unit of the No. 2 air conditioner unit is 4321.

[0064] The electricity meter has a communication function. The electricity meter detects the power consumption of the outdoor unit, communicates with the electricity meter communication module, and determines the power consumption corresponding to the air conditioner unit through the address correspondence relationship.

[0065] The electricity meter communication module is used to receive electricity meter data regularly. That is, the electricity meter communication module communicates with the electricity meter regularly to receive electricity meter data.

[0066] Generally, the electricity meter communication module communicates with the electricity meter at a fixed second communication cycle.

[0067] For example, the second communication cycle is 10 minutes. Of course, the second communication cycle can also be other durations.

[0068] A second communication cycle of 10 minutes will neither collect too much useless information and waste resources, nor have too long a collection cycle to miss important information.

[0069] The data received by the air conditioner communication module and the electricity meter communication module are sent to the control module. The control module calculates the power consumption of the outdoor unit. The control module distributes the power consumption of the outdoor unit to the indoor units according to the operating state of the indoor units and the power consumption of the outdoor unit.

[0070] The control module is configured with a power consumption distribution cycle. The control module calculates the power consumption of the outdoor unit within the power consumption distribution cycle based on the electricity meter data collected during the power consumption distribution cycle, determines the power consumption of the outdoor unit within the power consumption distribution cycle according to the correction conditions, and performs power consumption distribution based on the air conditioner operating state collected during the power consumption distribution cycle and the determined power consumption of the distribution cycle. After each power consumption distribution cycle ends, the device uploads the acquisition results of the air conditioner operating state, the data acquisition results of the electricity meter, and the distribution results to the household billing information management platform.

[0071] Among them, the power consumption distribution cycle is an integer multiple of the second communication cycle. At the start time and end time of the power consumption distribution cycle, the electricity meter communication module communicates with the electricity meter to receive electricity meter data. Subtracting the electricity meter data at the end time of the power consumption distribution cycle from the electricity meter data at the start time of the power consumption distribution cycle can obtain the power consumption of the power consumption distribution cycle.

[0072] For example, the power consumption distribution cycle is 1 hour, and the start and end times are the natural whole-point moments of each natural day. A power consumption distribution cycle of 1 hour is for the convenience of calculating peak-valley-flat electricity prices.

[0073] Of course, the power consumption distribution cycle can also be other durations.

[0074] As Figure 5 shown, when the power consumption distribution cycle is 1 hour and the second communication cycle is 10 minutes, within one power consumption distribution cycle, under normal circumstances, the power communication module communicates with the electricity meter 7 times.

[0075] At 0 minutes, the power communication module communicates with the electricity meter once and receives the electricity meter data as M0;

[0076] At 10 minutes, the power communication module communicates with the electricity meter once and receives the electricity meter data as M1;

[0077] At 20 minutes, the power communication module communicates with the electricity meter once and receives the electricity meter data as M2;

[0078] At 30 minutes, the power communication module communicates with the electricity meter once and receives the electricity meter data as M3;

[0079] At 40 minutes, the power communication module communicates with the electricity meter once and receives the electricity meter data as M4;

[0080] At 50 minutes, the power communication module communicates with the electricity meter once and receives the electricity meter data as M5;

[0081] At 60 minutes, the power communication module communicates with the electricity meter once and receives the electricity meter data as M6.

[0082] The electricity meter data M6 received at the end time of the current power sharing period （i） is also the electricity meter data M0 received at the start time of the next power sharing period （i+1） , where i is the serial number of the time period where the power sharing period is located. Generally, there are 24 power sharing periods in a day (natural day), and i = 0, 1, 2,..., 23.

[0083] In the actual use process, there is a situation where the reception of the electricity meter data fails due to abnormal communication between the electricity meter and the power communication module. The missing electricity meter acquisition data will cause the cumulative shared power of each indoor unit in the air conditioning system to not match the actual power consumption of the outdoor unit of the air conditioning system, seriously affecting the accuracy of the outdoor unit's power consumption and further affecting the accuracy of power sharing.

[0084] Specifically, if a communication abnormality occurs during the intermediate time (M1 - M5) except for the start time (M0) and the end time (M6), since the data reception of the start time M0 and the end time M6 is normal, it will not affect the calculation of the power consumption of the outdoor unit. If the data reception of the start time or the end time is abnormal, the calculation result of the power consumption of the outdoor unit will not match the actual power consumption due to partial data loss.

[0085] Therefore, in this embodiment, the power sharing period is divided into a complete period and an incomplete period according to the data reception result. Different power consumption calculation methods are set for the complete period and the incomplete period. Especially for the incomplete period, it is judged whether it is necessary to correct the calculated power consumption according to the correction conditions, so that the corrected power consumption of the outdoor unit is as close as possible to the actual power consumption.

[0086] For a complete cycle, since there is no missing data, the calculated power consumption of the air conditioner outdoor unit is consistent with the actual power consumption and does not require correction. The calculated power consumption of the air conditioner outdoor unit is the power consumption for the power sharing cycle.

[0087] For an incomplete cycle, since there is missing data, the calculated power consumption of the air conditioner outdoor unit is not consistent with the actual power consumption. When the correction conditions are met, the power consumption of the outdoor unit for the power sharing cycle is corrected based on the historical data for the same period to make the power consumption of the outdoor unit as close as possible to the actual power consumption and avoid damaging the interests of all parties.

[0088] Therefore, the control module is configured to: record a cycle in which the electricity meter communication module receives normal electricity meter data at both the start time and the end time of the power sharing cycle as a complete cycle, and record a cycle in which the electricity meter communication module fails to receive electricity meter data at least at the start time or the end time as an incomplete cycle; calculate the power consumption for the complete cycle as the power consumption for the power sharing cycle, and record the power consumption for the complete cycle as the historical power consumption for the period where the complete cycle is located; calculate the power consumption for the incomplete cycle. When there is historical power consumption for the period where the incomplete cycle is located and the historical power consumption and the power consumption for the incomplete cycle meet the correction conditions, use the historical power consumption as the power consumption for the power sharing cycle; otherwise, use the power consumption for the incomplete cycle as the power consumption for the power sharing cycle, and perform power sharing based on the air conditioner operating status collected during the power sharing cycle and the power consumption for the power sharing cycle.

[0089] Specifically, the control module takes the electricity meter data M0 （i） received by the electricity meter communication module at the start time of the power sharing cycle （i） and the electricity meter data Mn

[0090] received at the end time, and records a cycle in which both are normal as a complete cycle. Here, n = power sharing cycle / second communication cycle. In this embodiment, n = 60 min / 10 min = 6. （i） and the electricity meter data Mn （i） received at the end time, and calculates the power consumption P （i） for the complete cycle. The power consumption for the complete cycle is used as the power consumption P （i） for the power sharing cycle.

[0091] The power consumption P （i） for the complete cycle is equal to the difference between the electricity meter data Mn （i） received at the end time and the electricity meter data M0 （i） received at the start time, that is, P （i） = Mn （i） - M0 （i） 。

[0092] In this embodiment, P（0） = M6 （0） - M0 （0） ;

[0093] P （1） = M6 （1） - M0 （1） ;

[0094] P （2） = M6 （2） - M0 （2） ;

[0095] …

[0096] P （23） = M6 （23） - M0 （23） 。

[0097] The control module is configured to record the power consumption of a complete cycle as the historical power consumption of the time period where the complete cycle is located.

[0098] As Figure 6 shown, taking the correspondence between the historical power consumption of the complete cycles of the current day and the previous 7 days and the time periods as an example, at the complete cycle, the power consumption P of its power sharing cycle is recorded at this time period （i） , and at the non-complete cycle, the power consumption of its power sharing cycle is not recorded and is represented by " / ".

[0099] The control module records the cycle in which at least the start time or the end time fails to receive the electricity meter data as a non-complete cycle. The control module is configured to calculate the power consumption of the non-complete cycle.

[0100] Since the start time or the end time of the non-complete cycle fails to receive the electricity meter data, therefore, when the start time fails to receive the electricity meter data, the first time is the number of times of successful reception of the electricity meter data for other times except the start time; when the end time fails to receive the electricity meter data, the last time is the number of times of successful reception of the electricity meter data for other times except the end time; when both the start time and the end time fail to receive the electricity meter data, the first and the last times are the number of times of successful reception of the electricity meter data for other times except the start time and the end time.

[0101] At the non-complete cycle, the first received electricity meter data is recorded as Mj （i） , and the last received electricity meter data is recorded as Mk （i） , j≠0 or k≠n

[0102] Specifically, the control module is configured to calculate the power consumption P´ of the non-complete cycle according to the first received electricity meter data Mj （i） and the last received electricity meter data Mk （i） of the electricity meter communication module within the power sharing cycle （i）, the power consumption P´ of the non - complete cycle （i） is equal to the last received electricity meter data Mk （i） minus the first received electricity meter data Mj （i） .

[0103] That is, P´ （i） = Mk （i） - Mj （i） .

[0104] If the number of times the electricity meter communication module receives electricity meter data in the non - complete cycle ≤ 1, then P´ （i） = 0.

[0105] The control module is configured to use the historical power consumption as the power consumption of the power sharing cycle when there is historical power consumption in the period where the non - complete cycle is located and the historical power consumption and the power consumption of the non - complete cycle meet the correction condition, otherwise use the power consumption of the non - complete cycle as the power consumption of the power sharing cycle.

[0106] Among them, the correction condition is that the historical power consumption is greater than the power consumption of the non - complete cycle.

[0107] To improve the correction accuracy, the control module is configured to calculate the average historical power consumption of at least two historical power consumptions when there are at least two historical power consumptions in the period where the non - complete cycle is located; when the average historical power consumption is greater than the power consumption of the non - complete cycle, use the average historical power consumption as the power consumption of the power sharing cycle.

[0108] Among them, the correction condition is that the average historical power consumption is greater than the power consumption of the non - complete cycle.

[0109] In this embodiment, the control module dynamically saves the power consumption of the complete cycles of the data of several natural days before the collection day as the historical data table, as Figure 6 shown.

[0110] If there are 3 or more power consumptions P （i） of the complete cycles before a certain day i of a certain period, take the power consumptions P （i） of the first three complete cycles of the nearest date before that day, and calculate the average value as the average historical power consumption = ∑P （i） / 3.

[0111] If there are 2 power consumptions P （i） of the complete cycles before a certain day i of a certain period, take the power consumptions P （i） of the first two complete cycles of the nearest date before that day, and calculate the average value as the average historical power consumption = ∑P （i） / 2.

[0112] If there is 1 power consumption P （i）, take the power consumption P of the previous complete cycle of the nearest date before the current day （i） , and use it as the average historical power consumption = P （i） .

[0113] When the average historical power consumption is greater than the calculated power consumption P' of the incomplete cycle （i） , use the average historical power consumption as the power consumption P of the power sharing cycle （i） .

[0114] If there is no power consumption of a complete cycle before a certain period i on the current day, use the calculated power consumption P' of the incomplete cycle （i） as the power consumption P of the power sharing cycle （i） .

[0115] In this embodiment, considering the actual usage scenario, in most public building scenarios, such as office buildings, commercial complexes, etc., the daily switching times are basically stable, and it is reasonable to take the historical records of the same time period in the previous few days. Since the billing system is not an unattended system, if the electricity meter goes offline accidentally, the property management party still needs to actually check it. Compensation is only a temporary remedial measure, and it is a reasonable choice to take the historical data of the previous 7 days for the compensation value, which conforms to the actual usage scenario. Of course, the historical data for compensation can also be selected for other time periods according to requirements.

[0116] Of course, the power consumption of the calculation period (complete cycle and incomplete cycle. In the complete cycle, it includes all the electricity meter data collected. In the incomplete cycle, the electricity meter data of the cycle where the electricity meter data collection fails does not participate in the calculation) can also be calculated by the following method: P （i） =(Mn （i） -M(n - 1) （i） ) + (M(n - 1) （i） -M(n - 2) （i） ) + … + (M1 （i） -M0 （i） ). i = 0, 1, 2, …, 23, representing 24 whole-hour hours of a natural day.

[0117] To avoid power loss, the control module is configured to issue a prompt when the electricity meter data reception fails or the number of consecutive electricity meter data reception failures exceeds the set number, reminding relevant personnel to check the communication situation of the electricity meter in time.

[0118] For example, if the reception of a certain electricity meter data fails continuously for 3 times, it is determined that the electricity meter data collection fails, and the operator is reminded to handle it. Setting 3 times is the most reasonable. Of course, other numbers can also be used.

[0119] Of course, the reason for the failure of the electricity meter communication module to receive electricity meter data is not necessarily communication failure. It could also be other factors. For example, in the case of manual power-off, the electricity meter is powered off, resulting in communication failure. Since the electricity meter and the outdoor unit of the air-conditioning system are under the same switch, if it is a manual power-off, both the status of the outdoor unit and the electricity meter will fail to be collected. Therefore, the control module is configured to count the number of times the air-conditioning communication module receives the operating status of the outdoor unit within a specific time period when the electricity meter data reception fails. When the obtained number of times exceeds the preset number of times (for example, the set number of times is two), calculate the power consumption of the non-complete cycle. Otherwise, it is determined that the central air-conditioning system is powered off, and a reminder can be further sent to remind the staff to handle it. In this embodiment, the time period when the electricity meter collection fails is found in the non-complete cycle, and the operating status of the outdoor unit corresponding to the address within this time period is searched. When the number of times the operating status of the outdoor unit can be successfully collected ≥ 2, it indicates that it is not a power-off situation, and the power consumption of the power sharing cycle can be determined according to the above method.

[0120] Taking the data collection time axis from 0:00 to 1:00 as an example, since the cycle duration of air-conditioning data collection is not fixed and depends on the number of air-conditioning units, the collection cycle ranges from dozens of seconds to several minutes. When the device communicates with the air-conditioning system normally, if the number of times the air-conditioning status can be collected within 10 minutes ≥ 2, it can rule out manual power-off.

[0121] Of course, there is more than one method to rule out manual power-off. It is also possible to increase or decrease the number of times the operating status of the outdoor unit can be successfully collected during the electricity meter collection failure cycle. The solution of this embodiment may also result in misjudgment, but it is already the most reliable solution. Since the cycle duration of collecting the air-conditioning status is not fixed, increasing or decreasing the number of times may increase the probability of misjudgment.

[0122] The control module performs power sharing calculation based on the received air-conditioning operating status during the power sharing cycle and the determined power consumption P of the power sharing cycle （i） (the power sharing method is not the content claimed in the present invention and can be calculated according to the prior art, so it will not be introduced in detail), and uploads the collection result of the air-conditioning operating status, the data collection result of the electricity meter, and the sharing calculation result to the household billing information management platform, and marks the cycle using the correction value.

[0123] As Figure 7 shown, the working process of the central air-conditioning system in this embodiment is as follows:

[0124] S1. Regularly receive the operating status of the indoor unit and regularly receive the electricity meter data.

[0125] S2. Distinguish between a complete cycle and a non-complete cycle according to whether the electricity meter data is received normally during the start time and end time within the power sharing cycle.

[0126] S3. For a complete cycle, calculate the power consumption of the complete cycle, and use the calculated power consumption of the complete cycle as the power consumption of the power sharing cycle.

[0127] S4. For an incomplete cycle, calculate the power consumption of the incomplete cycle and obtain the historical power consumption.

[0128] S41. When there is historical power consumption during the period where the incomplete cycle is located and the historical power consumption meets the correction condition with the power consumption of the incomplete cycle, use the historical power consumption as the power consumption of the power sharing cycle.

[0129] S42. For an incomplete cycle, when there is no historical power consumption during the period where the incomplete cycle is located or the historical power consumption does not meet the correction condition with the power consumption of the incomplete cycle, use the calculated power consumption of the incomplete cycle as the power consumption of the power sharing cycle.

[0130] As Figure 8 shown, the working process of the central air-conditioning system in this embodiment is as follows:

[0131] S1. Regularly receive the operating status of the indoor unit and regularly receive the electricity meter data.

[0132] S2. Determine whether the reception of the electricity meter data at the start time and end time of the power sharing cycle is normal. If so, go to step S3; otherwise, go to step S6.

[0133] S3. Mark the power sharing cycle as a complete cycle.

[0134] S4. Calculate the power consumption of the complete cycle, and use the calculated power consumption of the complete cycle as the power consumption of the power sharing cycle.

[0135] S5. Record the calculated power consumption of the complete cycle as the historical power consumption during the period where the complete cycle is located.

[0136] S6. During a specific period when the reception of the electricity meter data fails, obtain the number of times the air-conditioning communication module receives the operating status of the outdoor unit.

[0137] S7. When the obtained number of times exceeds the preset number of times, go to step S8; otherwise, go to step S14.

[0138] S8. Mark the power sharing cycle as an incomplete cycle.

[0139] S9. Calculate the power consumption of the incomplete cycle.

[0140] S10. Determine whether there is corresponding historical power consumption during the period where the incomplete cycle is located. If so, go to step S11; otherwise, go to step S13.

[0141] S11. Determine whether the historical power consumption and the power consumption of the non - complete cycle meet the correction condition. If so, proceed to step S12; otherwise, proceed to step S13.

[0142] S12. Use the historical power consumption as the power consumption of the power sharing cycle.

[0143] S13. Use the calculated power consumption of the non - complete cycle as the power consumption of the power sharing cycle.

[0144] S14. Power - off reminder.

[0145] Allocate the power consumption of the indoor unit according to the power consumption of the power sharing cycle determined in step S4, S12 or S13.

[0146] When the electricity meter data collected by the above - mentioned central air - conditioning system in the power sharing cycle is a non - complete cycle, and the power consumption calculated from the non - complete cycle and the historical power consumption meet the correction condition, the historical power consumption is used for correction so that the corrected power consumption is as close as possible to the true value and the power loss is reduced.

[0147] In order to further improve the accuracy of the power consumption of the power sharing cycle and further improve the accuracy of the power allocation of the indoor unit, this embodiment further increases the correction cycle. When there is a non - complete cycle in the power sharing cycles included in the correction cycle and the electricity meter data is received normally at the start time and end time of the correction cycle, the power consumption of the correction cycle is calculated based on the electricity meter data received at the start time and end time of the correction cycle, and the power consumption of the non - complete cycle is corrected by the power consumption of the correction cycle, which can make the power consumption of the power sharing cycle of the non - complete cycle closer to the actual power consumption and improve the accuracy of the power consumption of the power sharing cycle of the non - complete cycle.

[0148] The control module is configured to include a correction cycle, and the correction cycle includes several power sharing cycles. When the electricity meter data is received normally at the start time and end time of the correction cycle and there is a non - complete cycle in the power sharing cycles included in the correction cycle, the electricity meter communication module calculates the power consumption of the correction cycle according to the electricity meter data received at the start time and end time of the correction cycle, and corrects the power consumption of the non - complete cycle according to the power consumption of the correction cycle; when the electricity meter communication module fails to receive the electricity meter data at the start time or end time of the correction cycle, the power consumption of the power sharing cycle is not corrected.

[0149] The control module is configured to include a correction cycle, and the correction cycle includes several power sharing cycles. That is, the duration of the correction cycle is an integer multiple of the duration of the power sharing cycle.

[0150] For the convenience of billing, the correction cycle is generally the billing cycle.

[0151] In order to facilitate calculation in the prepaid (users recharge before using the air conditioner) charging mode, the correction period (billing period) is set to 1 day, with 1 natural day as the billing period, and the start and end time is from 0:00 on the first natural day to 0:00 on the second natural day. After receiving the meter data and air conditioner status data, first store them in the database, and wait until the next morning (0:00), after receiving the collected data of the 24 power sharing cycles of the previous day, determine the power consumption of each power sharing cycle of the previous day, and further distribute the determined power consumption to each indoor unit.

[0152] Of course, the correction period may also be set to other times.

[0153] In this embodiment, when the communication module of the electric meter communicates normally, the control module can collect 144 electric meter data in one correction cycle, such as Figure 9 As shown, M0, M1, M2, …, M143 are collected in one correction cycle (1 natural day).

[0154] The control module is configured so that when the meter communication module fails to receive meter data at the start time or end time of the correction period, no secondary correction is made to the power consumption of the power sharing period. Since the meter data is not received at the start time or end time of the correction period, the power consumption calculated in the correction period is also inaccurate. At this time, no correction is made to the power consumption of the power sharing period to avoid the corrected data from deviating further from the actual power consumption.

[0155] The control module is configured to receive meter data according to the start time and end time of the correction cycle, and when the meter communication module receives meter data normally at the start time and end time of the correction cycle and the power sharing cycle included in the correction cycle has an incomplete cycle, calculate the power consumption △M of the correction cycle, and correct the power consumption of the incomplete cycle within the correction cycle according to the power consumption △M of the correction cycle.

[0156] Since the power consumption of a complete cycle is the real power consumption, the present embodiment does not need to correct the power consumption of a complete cycle, and only needs to correct the power consumption of an incomplete cycle.

[0157] The meter data received at the start time and end time of the correction period are both normal, specifically: the meter data received at the start time of the correction period (M0 in this embodiment) is normal, and the meter data received at the end time of the correction period (M143 in this embodiment) is normal.

[0158] When the power sharing period included in the correction period has an incomplete period, the power consumption ΔM of the correction period is calculated based on the meter data received at the start time of the correction period (M0 in this embodiment) and the meter data received at the end time (M143 in this embodiment), and the power consumption of the incomplete period is corrected based on the power consumption ΔM of the correction period.

[0159] Among them, the power consumption ΔM during the correction period = the electricity meter data received at the end time of the correction period - the electricity meter data received at the start time of the correction period.

[0160] In this embodiment, ΔM = M143 - M0.

[0161] In some embodiments, the control module is configured to calculate the sum ∑P of the power consumptions of all power sharing periods within the correction period （i） , where i = 0, 1, 2,..., 23, and distribute the difference between the power consumption ΔM of the correction period and the sum ∑P of the power consumptions of all power sharing periods within the correction period （i） to the power consumption of the non - complete period.

[0162] Since the electricity meter data received at the start time and the end time of the correction period are both normal, therefore, the power consumption calculated for the correction period is the actual power consumption of the outdoor unit. However, when there is a non - complete period within the correction period, since the power consumption calculated for the non - complete period or the power consumption after one - time correction is not exactly the same as the actual power consumption, therefore, using the actual power consumption of the correction period to perform secondary correction on the power consumption of the non - complete period can make the power consumption of the non - complete period closer to the actual power consumption after the secondary correction.

[0163] The control module is configured to: calculate the sum of the power consumptions of the non - complete periods within the correction period, and calculate the compensation coefficient of the non - complete period = the power consumption of the non - complete period / the sum of the power consumptions of the non - complete periods within the correction period.

[0164] Among them, the sum ∑P of the power consumptions of the non - complete periods within the correction period （m） , where m is the serial number of the time period in which the power sharing period is a non - complete period. In this embodiment, m is any value from 0 to 23. For example, if there are 4 non - complete periods within a correction period, and the serial numbers of the time periods where the non - complete periods are located are 3, 4, 15, 16, then the sum ∑P of the power consumptions of the non - complete periods within the correction period （m） = P （3） + P （4） + P （15） + P （16） .

[0165] Calculate the compensation coefficient S of the non - complete period （m） = the power consumption P of the non - complete period （m） / the sum ∑P of the power consumptions of the non - complete periods within the correction period （m） .

[0166] In this embodiment, the compensation coefficient S of the period where the serial number of the non - complete period is 3 （3） = P （3） / (P （3） + P（4） + P （15） + P （16） ).

[0167] The compensation coefficient S of the cycle with the time period serial number 4 where the non - complete cycle is located （4） = P （4） / (P （3） + P （4） + P （15） +P （16） ).

[0168] The compensation coefficient S of the cycle with the time period serial number 15 where the non - complete cycle is located （15） = P （15） / (P （3） + P （4） +P （15） + P （16） ).

[0169] The compensation coefficient S of the cycle with the time period serial number 16 where the non - complete cycle is located （16） = P （16） / (P （3） + P （4） +P （15） + P （16） ).

[0170] The power consumption ΔM of the correction cycle and the sum ∑P of the power consumptions of all power sharing cycles within the correction cycle （i） When the condition of decrement correction is satisfied, the power consumption of the corrected non - complete cycle = the power consumption of the non - complete cycle - ((the sum of the power consumptions of all power sharing cycles within the correction cycle - the power consumption of the correction cycle) * the compensation coefficient of the non - complete cycle).

[0171] Among them, the condition of decrement correction is that the power consumption ΔM of the correction cycle is less than the sum ∑P of the power consumptions of all power sharing cycles within the correction cycle （i） (i = 0, 1, 2,..., 23), that is, ΔM < ∑P （i） .

[0172] The power consumption Q of the corrected non - complete cycle （m） = the power consumption P of the non - complete cycle （m） - ((the sum ∑P of the power consumptions of all power sharing cycles within the correction cycle （i） - the power consumption ΔM of the correction cycle) * the compensation coefficient S of the non - complete cycle （m） ).

[0173] If this embodiment meets the condition of ΔM < ∑P （i） The result after correcting the power consumption of the non - complete cycle is:

[0174] The power consumption Q of the cycle with the period serial number 3 where the corrected non - complete cycle is located （3） = P （3） - ( (∑P （i） - ΔM) * S （3） ), (i = 0, 1, 2,..., 23).

[0175] The power consumption Q of the cycle with the period serial number 4 where the corrected non - complete cycle is located （4） = P （4） - ( (∑P （i） - ΔM) * S （4） ), (i = 0, 1, 2,..., 23).

[0176] The power consumption Q of the cycle with the period serial number 15 where the corrected non - complete cycle is located （15） = P （15） - ( (∑P （i） - ΔM) * S （15） ), (i = 0, 1, 2,..., 23).

[0177] The power consumption Q of the cycle with the period serial number 16 where the corrected non - complete cycle is located （16） = P （16） - ( (∑P （i） - ΔM) * S （16） ), (i = 0, 1, 2,..., 23).

[0178] When the power consumption ΔM of the correction cycle and the sum ∑P of the power consumptions of all power sharing cycles within the correction cycle （i） meet the incremental correction condition, the power consumption of the corrected non - complete cycle = the power consumption of the non - complete cycle + ( (the power consumption of the correction cycle - the sum of the power consumptions of all power sharing cycles within the correction cycle) * the compensation coefficient of the non - complete cycle).

[0179] Among them, the incremental correction condition is that the power consumption ΔM of the correction cycle is greater than the sum ∑P of the power consumptions of all power sharing cycles within the correction cycle （i） (i = 0, 1, 2,..., 23), that is, ΔM < ∑P （i） .

[0180] The power consumption Q of the corrected non - complete cycle （m） = the power consumption P of the non - complete cycle （m） + ( (the power consumption ΔM of the correction cycle - the sum ∑P of the power consumptions of all power sharing cycles within the correction cycle （i） ) * the compensation coefficient S of the non - complete cycle （m） ).

[0181] If this embodiment meets ΔM < ∑P （i）If the conditions are met, the result of correcting the power consumption of the non - complete cycle is:

[0182] The power consumption Q of the cycle with the time period serial number 3 where the corrected non - complete cycle is located （3） = P （3） + ((ΔM - ∑P （i） ) * S （3） ), (i = 0, 1, 2,..., 23).

[0183] The power consumption Q of the cycle with the time period serial number 4 where the corrected non - complete cycle is located （4） = P （4） + ((ΔM - ∑P （i） ) * S （4） ), (i = 0, 1, 2,..., 23).

[0184] The power consumption Q of the cycle with the time period serial number 15 where the corrected non - complete cycle is located （15） = P （15） + ((ΔM - ∑P （i） ) * S （15） ), (i = 0, 1, 2,..., 23).

[0185] The power consumption Q of the cycle with the time period serial number 16 where the corrected non - complete cycle is located （16） = P （16） + ((ΔM - ∑P （i） ) * S （16） ), (i = 0, 1, 2,..., 23).

[0186] This embodiment improves the accuracy of the power consumption of the non - complete cycle, making it closer to the true value. Therefore, the accuracy of the power sharing for the power sharing cycle is further improved.

[0187] After obtaining the sharing results of each power sharing cycle, the billing data of the user is generated according to the sharing results.

[0188] As Figure 10 shown, after obtaining the power consumption of all power sharing cycles after the first correction based on Figure 7 , 8 the working process of the central air - conditioning system for the second correction of the power consumption of the power sharing cycle is as follows:

[0189] S1. Obtain all power sharing cycle data within the correction period.

[0190] S2. Determine whether all power sharing cycles are complete cycles. If so, go to step S3; otherwise, go to step S4.

[0191] S3. End, and do not perform secondary sharing on the data of the power sharing cycle.

[0192] S4. Determine that the electricity meter data received at the start time and end time of the correction period is normal. If so, proceed to step S5; otherwise, proceed to step S3.

[0193] S5. Calculate the power consumption ΔM of the correction period based on the electricity meter data received at the start time and end time of the correction period, and calculate the sum ∑P of the power consumption of all power sharing periods within the correction period. （i） 。

[0194] When the condition for decrement correction is met, proceed to step S6; when the condition for increment correction is met, proceed to step S7.

[0195] S6. Perform decrement correction on the power consumption of all non - complete periods.

[0196] The power consumption of the corrected non - complete period = the power consumption of the non - complete period - ((the sum of the power consumption of all power sharing periods within the correction period - the power consumption of the correction period) * the compensation coefficient of the non - complete period).

[0197] S7. Perform increment correction on the power consumption of all non - complete periods.

[0198] The power consumption of the corrected non - complete period = the power consumption of the non - complete period + ((the power consumption of the correction period - the sum of the power consumption of all power sharing periods within the correction period) * the compensation coefficient of the non - complete period).

[0199] In this embodiment, the true power consumption of the correction period is used to perform secondary correction on the power consumption of the non - complete period, which can make the power consumption of the non - complete period closer to the true power consumption after the secondary correction. Since the power sharing is based on the power consumption, on the premise of improving the accuracy of the power consumption, the accuracy of the power sharing is also improved.

[0200] In the description of the above - mentioned embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0201] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A central air conditioning system, comprising a plurality of outdoor units and indoor units, characterized in that, It further includes: An air conditioner communication module for receiving the operating status of the indoor unit; An electricity meter communication module for periodically receiving electricity meter data, where the electricity meter is used to detect the power consumption of the outdoor unit; A control module configured to: record a cycle in which the electricity meter communication module receives the electricity meter data normally at both the start time and the end time of the power sharing period as a complete cycle, and record a cycle in which the electricity meter data is received unsuccessfully at least at the start time or the end time as an incomplete cycle; calculate the power consumption of the complete cycle as the power consumption of the power sharing period, and record the power consumption of the complete cycle as the historical power consumption of the time period where the complete cycle is located; calculate the power consumption of the incomplete cycle, and when there is historical power consumption in the time period where the incomplete cycle is located and the historical power consumption and the power consumption of the incomplete cycle meet the correction condition, use the historical power consumption as the power consumption of the power sharing period, otherwise use the power consumption of the incomplete cycle as the power consumption of the power sharing period; The control module is configured to include a correction period, the correction period includes several power sharing periods, when the electricity meter communication module receives the electricity meter data normally at both the start time and the end time of the correction period and there are incomplete cycles among the power sharing periods included in the correction period, calculate the power consumption of the correction period based on the electricity meter data received at the start time and the end time of the correction period, and correct the power consumption of the incomplete cycle according to the power consumption of the correction period; when the electricity meter communication module fails to receive the electricity meter data at the start time or the end time of the correction period, do not correct the power consumption of the power sharing period.

2. The central air conditioning system according to claim 1, characterized in that, The control module is configured to calculate the average historical power consumption of at least two historical power consumptions when there are at least two historical power consumptions in the time period where the incomplete cycle is located; when the average historical power consumption is greater than the power consumption of the incomplete cycle, use the average historical power consumption as the power consumption of the power sharing period.

3. The central air conditioning system according to claim 1, characterized in that, The control module is configured to, within a specific time period when receiving the electricity meter data fails, count the number of times the air conditioner communication module receives the operating status of the outdoor unit, and calculate the power consumption of the incomplete cycle when the obtained number of times exceeds a preset number of times, otherwise, determine that the central air-conditioning system is powered off.

4. The central air conditioning system according to claim 1, characterized in that, The correction condition is that the historical power consumption is greater than the power consumption of the incomplete cycle.

5. The central air conditioning system according to claim 1, characterized in that, The control module is configured to calculate the power consumption of the complete cycle based on the electricity meter data received by the electricity meter communication module at the start time and the end time of the complete cycle, and the power consumption of the complete cycle is equal to the difference between the electricity meter data received at the end time and the electricity meter data received at the start time; The control module is configured to calculate the power consumption of the incomplete cycle based on the electricity meter data received for the first time and the last time within the incomplete cycle by the electricity meter communication module, and the power consumption of the incomplete cycle is equal to the difference between the electricity meter data received at the last time and the electricity meter data received at the first time.

6. The central air conditioning system according to claim 1, characterized in that, The control module is configured to issue a prompt when receiving the electricity meter data fails or the number of consecutive failures to receive the electricity meter data exceeds a set number of times.

7. The central air conditioning system according to claim 1, characterized in that, The control module is configured to calculate the sum of the power consumption of all power sharing periods within the correction period, and allocate the difference between the power consumption of the correction period and the sum of the power consumption of all power sharing periods within the correction period to the power consumption of the non-complete period.

8. The central air conditioning system according to claim 7, characterized in that, The control module is configured to: calculate the sum of the power consumption of the non-complete periods within the correction period, and calculate the compensation coefficient of the non-complete period = the power consumption of the non-complete period / the sum of the power consumption of the non-complete periods within the correction period; When the power consumption of the correction period and the sum of the power consumption of all power sharing periods within the correction period meet the decrement correction condition, the power consumption of the corrected non-complete period = the power consumption of the non-complete period - ((the sum of the power consumption of all power sharing periods within the correction period - the power consumption of the correction period) * the compensation coefficient of the non-complete period); When the power consumption of the correction period and the sum of the power consumption of all power sharing periods within the correction period meet the increment correction condition, the power consumption of the corrected non-complete period = the power consumption of the non-complete period + ((the power consumption of the correction period - the sum of the power consumption of all power sharing periods within the correction period) * the compensation coefficient of the non-complete period).

9. The central air conditioning system according to claim 8, characterized in that, The decrement correction condition is that the power consumption of the correction period is less than the sum of the power consumption of all power sharing periods within the correction period; the increment correction condition is that the power consumption of the correction period is greater than the sum of the power consumption of all power sharing periods within the correction period.

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