Electricity statistics method, device and central air conditioning system based on Internet of Things technology

Abstract

This application discloses a power consumption statistics method, device, and central air conditioning system based on Internet of Things (IoT) technology. The central air conditioning system includes an outdoor unit system and multiple indoor units. The statistics method includes: collecting the operating status information of each of the multiple indoor units within a time period T; and collecting the total power consumption E of the outdoor unit system using a power meter. 外总 The total power consumption E is allocated according to the predetermined strategy based on the operating status information. 外总 The electricity allocated to each indoor air conditioning unit is E, of which the electricity allocated to the i-th indoor air conditioning unit is E. 分 (i) Calculate the power consumption of each indoor unit of the multiple air conditioners during the time period T, where the power consumption of the i-th indoor unit during the time period T is E. 自 (i); Calculate the billed electricity consumption E of the i-th indoor unit of the air conditioner during time period T. 计 (i) is E 分 (i) and E 自 The sum of (i). This achieves the goal of accurately calculating the billed electricity consumption of each user's air conditioning usage and providing data support for accurate and reasonable central air conditioning billing.

Description

Technical Field

[0001] This invention belongs to the field of central air conditioning technology, specifically relating to a power consumption statistics method, device, and central air conditioning system based on Internet of Things (IoT) technology. Background Technology

[0002] With the increasing popularity of smart home appliances, users have developed a demand for remote, real-time, and visualized monitoring of their home appliance usage. Some shopping malls, hotels, and industrial parks use central air conditioning systems for their buildings. These systems can consist of multiple refrigerant systems, each providing cooling and heating to multiple connected indoor units. For example, each office rented out in an industrial park may have one or more indoor air conditioning units installed, depending on the room's size. The administrator then charges for air conditioning usage based on statistics of each tenant's electricity consumption. Since the central air conditioning system centrally cools and heats, then distributes the refrigerant to each indoor unit via pipes, how should the centralized power consumption of the refrigerant system be allocated to each indoor unit (tenant)? In existing non-smart central air conditioning systems, it's impossible to collect effective user electricity consumption information. Some management methods involve tenants sharing the cost per person based on the total system's electricity consumption, some use a fixed monthly fee, and others use a method based on the tenant's usable area (the larger the area, the more indoor units are installed). None of the above methods can accurately track each tenant's air conditioning electricity usage, making it impossible to objectively and fairly manage user charges. Furthermore, some users, feeling that the charges are unfair (such as sharing the cost equally), overuse their air conditioners, resulting in significant energy waste, while users who conserve energy or take time off unfairly suffer financial losses. Summary of the Invention

[0003] To address at least one of the above problems, this invention proposes a power consumption statistics method, device, and central air conditioning system based on Internet of Things (IoT) technology. By rationally distributing the power consumption of the outdoor unit system to each indoor unit, the invention aims to accurately count the billed power consumption of each user's air conditioning usage, providing data support for accurate and reasonable central air conditioning billing.

[0004] The technical solution adopted in this invention is as follows:

[0005] In the first aspect, this application discloses a power consumption statistics method based on Internet of Things (IoT) technology, applied to a central air conditioning system, which includes an outdoor unit system and multiple indoor units. The statistics method includes the following steps:

[0006] Collect the operating status information of the multiple indoor air conditioners within a time period T; for the i-th indoor air conditioner, the operating status information includes the cooling time tc(i), heating time th(i), and air supply time tw(i) of the i-th indoor air conditioner.

[0007] The total power consumption E of the air conditioning outdoor unit system is collected by the power meter. 外总 ;

[0008] The total power consumption E is allocated according to the operating status information and a predetermined strategy. 外总 The electricity allocated to each indoor air conditioning unit is E, of which the electricity allocated to the i-th indoor air conditioning unit is E. 分 (i);

[0009] Calculate the power consumption of each of the multiple indoor air conditioner units during the time period T, where the power consumption of the i-th indoor air conditioner unit during the time period T is E. 自 (i);

[0010] Calculate the billed electricity consumption E of the i-th indoor unit of the air conditioner during the time period T. 计 (i):

[0011] E 计 (i)=E 分 (i)+E 自 (i).

[0012] As an optional technical solution, the total power consumption E is distributed according to a predetermined strategy. 外总 When the power is distributed to each indoor air conditioning unit, the allocated power E to the i-th indoor air conditioning unit is calculated. 分 (i) is:

[0013]

[0014] Where j represents the total number of indoor air conditioning units. , Calculate according to the following formula:

[0015]

[0016] pc, ph, and pw are the rated cooling power, rated heating power, and rated air supply power of the outdoor unit of the air conditioner, respectively.

[0017] As an optional technical solution, for the i-th indoor unit of the air conditioner, the operating status information further includes: the operating voltage and operating current of the i-th indoor unit during the time period T, and the power consumption E of the i-th indoor unit itself during the time period T. 自 (i) Calculate based on the operating voltage and operating current.

[0018] In the second aspect, this application discloses a power counting device based on Internet of Things (IoT) technology, comprising:

[0019] The first outdoor unit of the air conditioner has a main control board as the host. The host is used to send corresponding control commands to each second outdoor unit and each indoor unit of the air conditioner, and to obtain the operating status information of each indoor unit of the air conditioner.

[0020] Multiple second air conditioning outdoor units, each of which has a main control board that acts as a slave unit, and each slave unit is communicatively connected to the main unit;

[0021] Multiple indoor air conditioning units, each of which has a main control board that is communicatively connected to the host computer;

[0022] The power meter is used to collect the total power consumption E of the first outdoor air conditioner unit and the plurality of second outdoor air conditioner units within a time period T. 外总 ;

[0023] The server communicates with the host via a communication module, and is used to determine the operating status information and total power consumption E. 外总 Calculate the allocated power consumption E to each indoor air conditioning unit. 分 (i) and then according to the allocated power E 分 (i) and the power consumption E of each indoor air conditioning unit 自 (i) Calculate the billed electricity consumption E of each indoor air conditioning unit. 计 (i);

[0024] Among them, E 分 (i) represents the total power consumption E of all outdoor units during time period T. 外总 The allocated power consumption per unit (E) for the i-th indoor air conditioner unit 自 (i) represents the power consumption of the i-th indoor unit of the air conditioner during time period T, E 计 (i) represents the billed electricity consumption of the i-th indoor air conditioner unit during time period T.

[0025] As an optional technical solution, the power consumption statistics system also includes a terminal, which is communicatively connected to the server.

[0026] As an optional technical solution, for the i-th indoor air conditioner unit, the operating status information includes the cooling time tc(i), heating time th(i), and air supply time tw(i) of the i-th indoor air conditioner unit within the time period T.

[0027] As an optional technical solution, the shared power E 分 (i) is:

[0028]

[0029] Where j represents the total number of indoor air conditioning units. , Calculate according to the following formula:

[0030]

[0031] Among them, pc, ph, and pw are the rated cooling power, rated heating power, and rated air supply power of the air conditioning outdoor unit system, respectively.

[0032] As an optional technical solution, for the i-th indoor unit of the air conditioner, the operating status information further includes: the operating voltage and operating current of the i-th indoor unit during the time period T, and the power consumption E of the i-th indoor unit itself during the time period T. 自 (i) Calculate based on the operating voltage and operating current.

[0033] As an optional technical solution, the communication module is a 5G communication module, a 4G communication module, or an NB-IoT communication module.

[0034] In a third aspect, this application also discloses a central air conditioning system, including an electricity statistics device based on Internet of Things technology as described in the second aspect above.

[0035] The beneficial effects of this invention are as follows:

[0036] 1. The electricity consumption of central air conditioning mainly comes from the energy consumption of outdoor units. This application uses a power meter to accurately count the total power consumption of outdoor units, rather than estimating the power consumption of each outdoor unit in real time based on its own current, voltage, running time, etc. This not only provides the accuracy of power consumption statistics, but also simplifies the power consumption calculation and improves the reliability and stability of equipment operation.

[0037] 2. Compared to allocating the total power consumption of the outdoor unit based on the power consumption of the indoor unit itself, this application uses the running time of each user-defined mode (such as tc(i), th(i), and tw(i)) as the core variable when calculating the allocated power consumption of each indoor unit. The allocation factor wk(i) is calculated from these core variables and the rated power of the outdoor unit in the corresponding operating mode. This allocation factor better represents the power consumption of the outdoor unit when the indoor unit is operating. The proportion of this allocation factor to the sum of all allocation factors allows for a more accurate and reasonable calculation of the allocated power consumption of each indoor unit.

[0038] E 分 (i) This ensures the accuracy and reasonableness of the charges and avoids energy waste. At the same time, in the calculation of the allocated electricity for each indoor unit, various complex parameters (including voltage, current, cooling capacity, compressor operating conditions, etc.) are eliminated, simplifying the algorithm and saving computing resources and expenses. Attached Figure Description

[0039] Figure 1 This is a diagram of the architecture of a central air conditioning system.

[0040] Figure 2 This is a flowchart of a power consumption statistics method based on Internet of Things (IoT) technology.

[0041] Figure 3 This is an architecture diagram of a power consumption statistics device based on Internet of Things (IoT) technology.

[0042] Figure 4 This is a block diagram of the power supply system for a central air conditioning system. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components and steps of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] Example

[0046] The unit of electricity consumption for large household / commercial appliances is "kilowatt-hour" (kWh). Electricity consumption (kWh) = power (kilowatts) * time (hours). Power = voltage * current (P = U * I). Electricity consumption is the cumulative sum of power and time. Figure 4 As shown, the power consumption of a central air conditioning system comes from two parts: one part is the power consumption of the outdoor unit in the refrigerant system (mainly the power consumption of the compressor, outdoor unit fan, and outdoor unit main control board), and the other part is the power consumption of each indoor unit connected to that outdoor unit in the refrigerant system (mainly the power consumption of the indoor unit fan and indoor unit main control board). Each indoor unit's main control board can obtain its own operating voltage, current, on / off status, and mode. Therefore, each indoor unit can calculate its own power consumption, hereinafter referred to as indoor unit self-consumption. However, for each indoor unit, each user may have different settings for on / off status, mode, temperature, fan speed, etc. So how can the power consumption of the outdoor unit in the refrigerant system be accurately allocated to each indoor unit? To address this, some manufacturers' intelligent solutions read the self-consumption of each indoor unit and the total power consumption of the outdoor unit through an intelligent module, and directly allocate the power consumption by calculating the energy consumption ratio of the indoor units. For example, the power allocation calculation method for indoor unit 1 over a period of time is as follows:

[0047] Indoor unit 1's allocated power consumption = Total outdoor unit power consumption * (Indoor unit 1's self-consumption power consumption / Total self-consumption power consumption of all indoor units)

[0048] This algorithm has a relatively large error. For example, if indoor unit 1 runs air for 1 hour and indoor unit 2 cools for 1 hour, a large amount of the electrical energy consumed for cooling comes from the outdoor unit, while the electricity consumed by indoor unit 2 is roughly the same as the electricity consumed by indoor unit 1 for air circulation (i.e., the electricity consumed by indoor unit 1 itself). This algorithm thus distributes the cooling electricity used by indoor unit 2 evenly across indoor unit 1. The tenant of indoor unit 1 ends up paying more for the cooling energy consumption of someone else.

[0049] To accurately and reasonably allocate the power consumption of the outdoor unit to the corresponding indoor unit, this embodiment discloses a power consumption statistics method based on Internet of Things (IoT) technology. This method is applied to a central air conditioning system, such as... Figure 1 As shown, the central air conditioning system includes an outdoor unit system and multiple indoor units, such as... Figure 2 As shown, the statistical method includes the following steps:

[0050] S1. Collect the operating status information of the multiple indoor air conditioners within a time period T; for the i-th indoor air conditioner, the operating status information includes the cooling time tc(i), heating time th(i), and air supply time tw(i) of the i-th indoor air conditioner. The start and end times of the time period T are from time t to time (t+T).

[0051] S2. Collect the total power consumption E of the air conditioning outdoor unit system using a power meter. 外总 The power meter typically collects E. 外总 The cumulative value, in E 外总 (t) represents the total power consumption of the air conditioner outdoor unit system at time t. Then, the total power consumption E of the air conditioner outdoor unit system during the time interval T from time t to (t+T) is... 外总 The value is E 外总 (t+T) minus E 外总 The difference between (t).

[0052] S3. Based on the operating status information, allocate the total power consumption of all outdoor units within the time period T according to a predetermined strategy. 外总 (t+T)-E 外总 (t)} to each indoor air conditioning unit, of which the allocated power to the i-th indoor air conditioning unit is E 分 (i).

[0053] As an optional implementation, the allocated power E to the i-th indoor air conditioning unit 分 (i) Calculate according to the following formula:

[0054]

[0055] Where j represents the total number of indoor air conditioning units. ; The allocation factor is calculated according to the following formula:

[0056]

[0057] Wherein, pc, ph, and pw are the rated cooling power, rated heating power, and rated air supply power of the outdoor unit system of the air conditioner, respectively. The values ​​of pc, ph, and pw can be determined during production testing. tc(i) is the time during which the i-th indoor unit of the air conditioner operates in cooling mode within the time period T, th(i) is the time during which the i-th indoor unit of the air conditioner operates in heating mode within the time period T, and tw(i) is the time during which the i-th indoor unit of the air conditioner operates in air supply mode within the time period T.

[0058] For the i-th indoor air conditioner unit, multiply the time tc(i), th(i), tw(i) of its operation in each mode by the rated power pc, ph, pw of the outdoor unit system in the corresponding mode, and then sum them to obtain the allocation factor wk(i). This allocation factor wk(i) is strongly positively correlated with the actual amount of electricity to be allocated to the i-th indoor air conditioner unit. After obtaining the sum of all allocation factors, the allocated electricity E to the i-th indoor air conditioner unit can be calculated according to formula (1). 分 (i).

[0059] Compared to allocating the power consumption of the indoor unit to the total power consumption of the outdoor unit based on the power consumption of the indoor unit itself, the allocation factor wk(i) in this embodiment is obtained by multiplying the working time of the indoor unit in each working mode by the rated power of the outdoor unit in the corresponding working mode and then summing them. This allocation factor is more representative of the power consumption of the outdoor unit when the indoor unit is working. By using the proportion of this allocation factor to the sum of the total allocation factors, the allocated power E of each indoor unit can be calculated more accurately and reasonably. 分 (i).

[0060] S4. Calculate the power consumption of each of the multiple indoor air conditioner units during the time period T, wherein the power consumption of the i-th indoor air conditioner unit during the time period T is E. 自 (i).

[0061] As an optional implementation, for the i-th indoor unit of the air conditioner, the operating status information further includes: the operating voltage and operating current of the i-th indoor unit during the time period T, and the power consumption E of the i-th indoor unit itself during the time period T. 自 (i) Calculation based on the operating voltage and operating current. Multiplying the operating voltage by the operating current yields the operating power, and integrating the operating power over time gives the indoor unit's self-consumption power E. 自 (i).

[0062] S5. Calculate the billed electricity consumption E of the i-th indoor unit of the air conditioner during the time period T. 计 (i):

[0063] E 计 (i)=E 分 (i)+E 自 (i).

[0064] Finally, the charge for indoor unit 1 during the time period T is calculated based on the electricity consumption E measured by indoor unit 1. 计 The calculation result of (i) is used as the basis for charging the indoor unit 1 for electricity consumption.

[0065] This embodiment also discloses a power consumption statistics device based on Internet of Things (IoT) technology, such as... Figure 3 As shown, the following description uses 4 outdoor units and 6 indoor units as an example to illustrate the device. The device includes four outdoor air conditioning units, six indoor air conditioning units, a power meter, a communication module, a server, and a terminal. The main control board of the first outdoor unit acts as the master unit, and the main control boards of the other three second outdoor units act as slave units. Each slave unit communicates with the master unit, and each indoor unit also communicates with the master unit through its own main control board. Communication between slave units and the master unit, and between indoor units and the master unit, can all use a 485 bus. The master unit is used to send corresponding control commands to each second outdoor unit and each indoor unit, and to obtain the operating status information of each indoor unit. Further, for the i-th indoor unit, the operating status information includes the cooling time tc(i), heating time th(i), and air supply time tw(i) of the i-th indoor unit within time period T. The cooling time tc(i), heating time th(i), and air supply time tw(i) are used to calculate the allocation factor. .

[0066] During operation, the outdoor unit's compressor compresses refrigerant, which is then fed into the indoor unit to regulate the temperature, bringing the ambient temperature to the user-set temperature. When the ambient temperature matches the set temperature, the compressor stops working, and the outdoor unit primarily operates in fan mode. After a period of time, if the ambient temperature differs slightly from the set temperature, the compressor restarts, and this cycle repeats. To illustrate with a cooling process, when the user turns on the cooling system, if the ambient temperature has not reached the user-set temperature, timer tc(i) starts. When the ambient temperature reaches the set temperature, timer tc(i) stops, and timer tw(i) begins. After a period of time, if the ambient temperature differs slightly from the set temperature (e.g., by about 1 degree Celsius), cooling resumes, and timer tw(i) stops, while timer tc(i) resumes. This cycle repeats continuously. During this cooling process, the cumulative heating time th(i) is zero.

[0067] Furthermore, the operating status information also includes: the operating voltage and operating current of the i-th indoor air conditioner unit during the time period T, and the power consumption E of the i-th indoor air conditioner unit itself during the time period T. 自 (i) Calculate the operating power based on the operating voltage and operating current. Multiply the operating voltage by the operating current to obtain the operating power. Integrate the operating power over time T to obtain the power consumption E. 自 (i) Each indoor unit will display its own power consumption E 自 (i) The result is sent to the host, and then the host sends it to the server.

[0068] The power meter is used to collect the total power consumption E of all outdoor air conditioning units at each time t. 外总 (t); The power meter and the host are connected via a 485 bus or a 232 bus for communication. The power meter will collect the total power consumption E of all outdoor units at time t. 外总 (t) is sent to the host. The host will receive the operating status information of the indoor air conditioner unit at time segment T and the total power consumption E of all outdoor units. 外总 (t) is sent to the server.

[0069] The server communicates with the host via a communication module, and is used to determine the operating status information and total power consumption E. 外总 (t) Calculate the allocated power E to each indoor air conditioning unit. 分 (i) and then according to the allocated power E 分 (i) and the power consumption E of each indoor air conditioning unit 自 (i) Calculate the billed electricity consumption of each indoor air conditioning unit.

[0070] E 计 (i); where, E 分 (i) represents the total power consumption E of all outdoor units during time period T. 外总 The allocated power consumption per unit (E) for the i-th indoor air conditioner unit 自 (i) represents the power consumption of the i-th indoor unit of the air conditioner during time period T.

[0071] E 计 (i) represents the billed electricity consumption of the i-th indoor air conditioner unit during time period T.

[0072] As an optional implementation, the server calculates the allocated power consumption E. 分 (i) is calculated according to the following formula:

[0073]

[0074] Where j represents the total number of indoor air conditioning units. apportionment factor Calculate according to the following formula:

[0075]

[0076] Where pc, ph, and pw represent the rated cooling power, rated heating power, and rated air supply power of the outdoor unit system, respectively. Taking the above 4 outdoor units and 6 indoor units as an example, for indoor unit 1, the total power consumption E of all outdoor units during time period T is... 外总 The allocated electricity E 分 (1) is:

[0077]

[0078] in, The six allocation factors are as follows:

[0079]

[0080]

[0081]

[0082]

[0083]

[0084]

[0085] For air conditioner indoor unit 1, the billed electricity consumption E during time period T is... 计 (1) is:

[0086] E 计 (1)=E 分 (1)+E 自 (1)

[0087] Finally, E 计 The value of (1) is used as the total power consumption of indoor air conditioner 1 during the time period T for charging. For indoor air conditioners 2-6, the charging method is the same as that for indoor air conditioner 1, and will not be repeated here.

[0088] In a refrigerant system, the microcontroller controlling the outdoor unit spends a significant amount of time calculating the electricity consumption of each user in real time using the algorithm described above. Some refrigerant systems have as many as 64 indoor units, making it difficult for the microcontroller to support such high computing power and communication efficiency. Furthermore, electricity consumption is the integral of power over time; frequent reporting of real-time operating data would lead to excessive data usage. In 5G, 4G, and NB-ION communication modules based on cellular mobile networks, data usage is billed based on usage, resulting in substantial costs. To reduce data usage costs, rationally allocate computing resources, and avoid data loss due to network outages that could affect billing results, each indoor air conditioner unit accumulates its own cooling time tc(i), heating time th(i), and air supply time tw(i). Taking the cooling time tc(i) as an example, starting from time zero, the total cooling time tc(i) up to time t is calculated. (t) This value is then sent to the host, which in turn sends it to the server. When it is necessary to calculate the cooling time used during the time interval T from time t to (t+T), tc(i) is used. (t+T) The value minus tc(i) (t) The value is sufficient. Even if the network between the indoor unit and the main unit of the air conditioner is disconnected, or the network between the main unit and the server is disconnected, causing some values ​​between time t and (t+T) to fail to be correctly uploaded to the server, it will not affect the cooling time {tc(i)} within the time period T between time t and (t+T). (t+T) -tc(i) (t) The calculation results are as follows. Similarly, the self-consumption power E of each indoor air conditioner unit is calculated. 自 (i) Each also performs its own cumulative statistics, and the cumulative statistical value E 自 (i) (t) Send it to the host, and then the host sends it to the server, E 自 (i) (t) This represents the total self-consumption of the i-th indoor unit of the air conditioner from time 0 to time t. (E) 自 (i) (t+T) Subtract E 自 (i) (t) The self-consumption of the i-th indoor air conditioner unit during the time period T from time t to (t+T) can then be calculated. As needed, the server can send control commands to the host every so often to reset the power meter counter, the incremental counters for power consumption and time parameters of each indoor unit, and to begin recalculating the relevant power consumption parameters.

[0089] As an optional implementation, the power consumption statistics system further includes a terminal, which is communicatively connected to the server. The terminal can be used to display the total power consumption of the outdoor unit to the administrator. Information such as the operating status, power consumption, and electricity cost of each indoor unit.

[0090] As an optional implementation, the communication module is a 5G communication module, a 4G communication module, or an NB-IoT communication module.

[0091] This embodiment also discloses a central air conditioning system, including the power consumption statistics device based on Internet of Things technology as described above.

[0092] Those skilled in the art will understand that the above modules can be distributed in the device as described in the embodiments, or they can be modified accordingly to be uniquely different from one or more devices in this embodiment. The modules of the above embodiments can be combined into one module, or they can be further divided into multiple units.

[0093] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored on a readable medium or on a network, including several instructions to cause an electronic device (which may be a personal computer, server, mobile terminal, or network device, etc.) to execute the methods according to the embodiments of this application.

[0094] The above description is merely a specific embodiment of this application, but the scope of protection of this application 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 this application should be included within the scope of protection of this application. All technical solutions that fall within the scope of the claims of this invention are within the scope of protection of this invention.

Claims

1. A power consumption statistics method based on Internet of Things (IoT) technology, applied to a central air conditioning system, wherein the central air conditioning system includes an outdoor unit system and multiple indoor units, characterized in that... The statistical method includes the following steps: Collect the operating status information of the multiple indoor air conditioners within a time period T; for the i-th indoor air conditioner, the operating status information includes the cooling time tc(i), heating time th(i), and air supply time tw(i) of the i-th indoor air conditioner. The total power consumption E of the air conditioning outdoor unit system is collected by the power meter. 外总 ; The total power consumption E is allocated according to the operating status information and a predetermined strategy. 外总 The electricity allocated to each indoor air conditioning unit is E, of which the electricity allocated to the i-th indoor air conditioning unit is E. 分 (i); Calculate the power consumption of each of the multiple indoor air conditioner units during the time period T, where the power consumption of the i-th indoor air conditioner unit during the time period T is E. 自 (i); Calculate the billed electricity consumption E of the i-th indoor unit of the air conditioner during the time period T. 计 (i): E 计 (i)=E 分 (i)+E 自 (i)。 2. The power consumption statistics method based on Internet of Things technology according to claim 1, characterized in that, The total power consumption E is allocated according to a predetermined strategy. 外总 When the power is distributed to each indoor air conditioning unit, the allocated power E to the i-th indoor air conditioning unit is calculated. 分 (i) is: Where j represents the total number of indoor air conditioning units. , Calculate according to the following formula: pc, ph, and pw are the rated cooling power, rated heating power, and rated air supply power of the outdoor unit of the air conditioner, respectively.

3. The power consumption statistics method based on Internet of Things technology according to claim 1, characterized in that, For the i-th indoor unit of the air conditioner, the operating status information also includes: the operating voltage and operating current of the i-th indoor unit during the time period T, and the power consumption E of the i-th indoor unit during the time period T. 自 (i) Calculate based on the operating voltage and operating current.

4. A power consumption counting device based on Internet of Things (IoT) technology, characterized in that, include: The first outdoor unit of the air conditioner has a main control board as the host. The host is used to send corresponding control commands to each second outdoor unit and each indoor unit of the air conditioner, and to obtain the operating status information of each indoor unit of the air conditioner. Multiple second air conditioning outdoor units, each of which has a main control board that acts as a slave unit, and each slave unit is communicatively connected to the main unit; Multiple indoor air conditioning units, each of which has a main control board that is communicatively connected to the host computer; The power meter is used to collect the total power consumption E of the first outdoor air conditioner unit and the plurality of second outdoor air conditioner units within a time period T. 外总 ; The server communicates with the host via a communication module, and is used to determine the operating status information and total power consumption E. 外总 Calculate the allocated power consumption E to each indoor air conditioning unit. 分 (i) and then according to the allocated power E 分 (i) and the power consumption E of each indoor air conditioning unit 自 (i) Calculate the billed electricity consumption E of each indoor air conditioning unit. 计 (i); Among them, E 分 (i) represents the total power consumption E of all outdoor units during time period T. 外总 The electricity allocated to the i-th indoor unit of the air conditioner, E 自 (i) represents the power consumption of the i-th indoor unit of the air conditioner during time period T, E 计 (i) represents the billed electricity consumption of the i-th indoor air conditioner unit during time period T.

5. The power consumption statistics device based on Internet of Things technology according to claim 4, characterized in that, The power consumption statistics system also includes a terminal, which is communicatively connected to the server.

6. The power consumption statistics device based on Internet of Things technology according to claim 4 or 5, characterized in that, For the i-th indoor air conditioner unit, the operating status information includes the cooling time tc(i), heating time th(i), and air supply time tw(i) of the i-th indoor air conditioner unit within the time period T.

7. The power consumption statistics device based on Internet of Things technology according to claim 6, characterized in that, The allocated electricity E 分 (i) is: Where j represents the total number of indoor air conditioning units. , Calculate according to the following formula: Among them, pc, ph, and pw are the rated cooling power, rated heating power, and rated air supply power of the air conditioning outdoor unit system, respectively.

8. The power consumption statistics device based on Internet of Things technology according to claim 4 or 5, characterized in that, For the i-th indoor unit of the air conditioner, the operating status information also includes: the operating voltage and operating current of the i-th indoor unit during the time period T, and the power consumption E of the i-th indoor unit during the time period T. 自 (i) Calculate based on the operating voltage and operating current.

9. The power consumption statistics device based on Internet of Things technology according to claim 4 or 5, characterized in that: The communication module is a 5G communication module, a 4G communication module, or an NB-IoT communication module.

10. A central air conditioning system, characterized in that, Includes the power consumption statistics device based on Internet of Things technology as described in any one of claims 4-9.

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