Multi-split air conditioner, energy consumption determination method, device and system thereof and storage medium

Abstract

The invention relates to the technical field of air conditioning equipment, and particularly discloses a multi-split air conditioner, an energy consumption determining method, device and system thereof and a storage medium, and the energy consumption determining method comprises the steps that historical operation parameters and historical environment parameters of the multi-split air conditioner at different moments within a first preset duration are obtained; fitting an energy consumption correction correlation coefficient of the multi-split air conditioner according to the historical operation parameters and the historical environment parameters; operation parameters and environment parameters of the multi-split air conditioner within a second preset duration are obtained; and according to the energy consumption correction correlation coefficient, the operation parameters and the environment parameters, the operation energy consumption of the multi-split air conditioner in the second preset duration is corrected so as to determine the actual operation energy consumption of the multi-split air conditioner in the second preset duration, and therefore the energy consumption evaluation precision of the multi-split air conditioner and the accuracy of investment return cycle measurement and calculation are improved. And an energy-saving transformation decision basis is provided for a user.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a multi-split air conditioner and a method, device, system, and storage medium for determining energy consumption thereof. Background Art

[0002] With the in-depth development of urban real estate, central air-conditioning systems have gradually entered the stock market. Multi-split units that have been in operation for more than ten years need to be replaced due to untimely maintenance or natural aging of equipment parts.

[0003] The calculation results of the investment payback period of the multi-split system transformation are an important decision-making basis for the owner to carry out energy-saving transformation, and the calculation of the multi-split system's annual energy consumption and the comparison of the energy consumption after the transformation are the key issues in the investment payback period calculation.

[0004] In related technologies, the factory design parameters of the VRF are generally used directly for calculations. However, after years of operation, the actual parameters of the VRF may have deviated from the design parameters, which can easily lead to large deviations in the process of determining the energy consumption of the VRF, making it impossible to accurately calculate information such as the investment return period. Summary of the Invention

[0005] The present invention aims to at least partially address one of the technical problems in the related art. To this end, a first object of the present invention is to provide a method for determining the energy consumption of a VRF system, which can improve the accuracy of energy consumption assessment and investment return period calculation for the VRF system, thereby providing users with a basis for energy-saving retrofit decision-making.

[0006] The second object of the present invention is to provide a device for determining energy consumption of a multi-connected system.

[0007] The third object of the present invention is to provide a multi-connected energy consumption determination system.

[0008] A fourth object of the present invention is to provide a computer-readable storage medium.

[0009] A fifth object of the present invention is to provide another device for determining energy consumption of a multi-split system.

[0010] A sixth object of the present invention is to provide a multi-link system.

[0011] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a method for determining the energy consumption of a multi-split unit, the method comprising: obtaining historical operating parameters and historical environmental parameters of the multi-split unit at different times within a first preset time period; fitting the energy consumption correction correlation coefficient of the multi-split unit based on the historical operating parameters and the historical environmental parameters; obtaining the operating parameters and environmental parameters of the multi-split unit within a second preset time period; and correcting the operating energy consumption of the multi-split unit within the second preset time period based on the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters to determine the actual operating energy consumption of the multi-split unit within the second preset time period.

[0012] The energy consumption determination method of a multi-split system in an embodiment of the present invention first obtains historical operating parameters and historical environmental parameters of the multi-split system within a first preset time period, then determines an energy consumption correction correlation coefficient based on the obtained historical operating parameters and historical environmental parameters, and then performs energy consumption correction in combination with the operating parameters and environmental parameters within a second preset time period to determine the actual operating energy consumption of the multi-split system within the second preset time period, thereby improving the accuracy of energy consumption assessment and investment payback period calculation of the multi-split system, and providing users with a basis for energy-saving transformation decision-making.

[0013] In some embodiments of the present invention, the energy consumption correction correlation coefficient of the multi-split unit is fitted according to the historical operating parameters and the historical environmental parameters, including: determining the partial load rate and theoretical energy consumption of the multi-split unit at different times according to the historical operating parameters and the historical environmental parameters; and fitting the energy consumption correction correlation coefficient of the multi-split unit according to the historical operating parameters, the historical environmental parameters, the partial load rate and the theoretical energy consumption.

[0014] In some embodiments of the present invention, the multi-split system includes a compressor, an outdoor unit and multiple indoor units, and the historical operating parameters include: the exhaust temperature, return air temperature, low pressure on the intake side and high pressure on the exhaust side of the compressor, the heat exchanger outlet pipe temperature and input power of the outdoor unit, the return air temperature, on / off status and cooling capacity of each indoor unit; the historical environmental parameters include: outdoor ambient temperature.

[0015] In some embodiments of the present invention, the partial load rate and theoretical energy consumption of the multi-split unit at different times are determined based on the historical operating parameters and the historical environmental parameters, including: determining the actual cooling capacity of the multi-split unit based on the outdoor ambient temperature, the exhaust temperature, the return air temperature, the exhaust side high pressure, the return air side low pressure, the heat exchanger outlet pipe temperature and the input power; determining the average return air temperature of the indoor unit based on the return air temperature, the on / off status and the cooling capacity; determining the maximum cooling capacity and maximum input power of the multi-split unit based on the average return air temperature and the outdoor ambient temperature; determining the partial load rate based on the actual cooling capacity and the maximum cooling capacity; determining the partial load rate power consumption based on the partial load rate; and determining the theoretical energy consumption based on the partial load rate power consumption and the maximum input power.

[0016] In some embodiments of the present invention, the energy consumption correction correlation coefficient of the multi-split unit is fitted according to the historical operating parameters, the historical environmental parameters, the partial load rate and the theoretical energy consumption, including: determining a first energy consumption correction coefficient according to the input power and the theoretical energy consumption; determining a second energy consumption correction coefficient according to the partial load rate, the outdoor ambient temperature and the energy consumption correction correlation coefficient to be fitted; fitting the energy consumption correction correlation coefficient to be fitted according to the first energy consumption correction coefficient and the second energy consumption correction coefficient to determine the energy consumption correction correlation coefficient.

[0017] In some embodiments of the present invention, the operating energy consumption of the multi-connected system within the second preset time period is corrected according to the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters, including: determining an energy consumption correction model of the multi-connected system within the second preset time period according to the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters, and determining the operating energy consumption of the multi-connected system within the second preset time period according to the operating parameters and the environmental parameters; and correcting the operating energy consumption through the energy consumption correction model.

[0018] In some embodiments of the present invention, the method also includes: dividing the second preset time into multiple time periods; obtaining the operating parameters and environmental parameters corresponding to each time period; determining the energy consumption correction model corresponding to each time period based on the energy consumption correction correlation coefficient, the operating parameters and environmental parameters corresponding to each time period, and determining the operating energy consumption of the multi-connected unit in each time period based on the operating parameters and environmental parameters corresponding to each time period; correcting the corresponding operating energy consumption through the energy consumption correction model corresponding to each time period to obtain the actual operating energy consumption of each time period; summing the actual operating energy consumption of each time period to determine the actual operating energy consumption of the second preset time period.

[0019] In some embodiments of the present invention, obtaining the historical operating parameters and historical environmental parameters of the multi-connected system at different times within a first preset time period includes: within the first preset time period, obtaining the historical operating parameters and historical environmental parameters of the multi-connected system once every third preset time period, wherein the first preset time period is greater than the third preset time period, and the first preset time period is an integer multiple of the third preset time period.

[0020] To achieve the above-mentioned purpose, the second embodiment of the present invention proposes an energy consumption determination device for a multi-split system, which is connected to the outdoor unit and cloud server of the multi-split system respectively. The energy consumption determination device for the multi-split system is used to: obtain the historical operating parameters and historical environmental parameters of the multi-split system at different times within a first preset time period, and upload them to the cloud server, so that the cloud server fits the energy consumption correction correlation coefficient of the multi-split system according to the historical operating parameters and the historical environmental parameters; obtain the operating parameters and environmental parameters of the multi-split system within a second preset time period, and upload them to the cloud server, so that the cloud server corrects the operating energy consumption of the multi-split system within the second preset time period according to the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters, and determines the actual operating energy consumption of the multi-split system within the second preset time period.

[0021] The energy consumption determination device of the multi-split system in the embodiment of the present invention is connected to the outdoor unit and cloud server of the multi-split system respectively, and is used to obtain and upload the historical operating parameters and historical environmental parameters of the multi-split system within a first preset time period to the cloud server, so that the cloud server can determine the energy consumption correction correlation coefficient based on the acquired historical operating parameters and historical environmental parameters, and then obtain and upload the operating parameters and environmental parameters within a second preset time period to correct the energy consumption to the cloud server, so that the cloud server can determine the actual operating energy consumption of the multi-split system within the second preset time period, thereby improving the energy consumption assessment accuracy of the multi-split system and the accuracy of the investment return period calculation, so as to provide users with a basis for energy-saving transformation decision-making.

[0022] In some embodiments of the present invention, the multi-split unit includes an outdoor unit, at least one compressor and multiple indoor units, and the historical operating parameters include: the exhaust temperature, return air temperature, low pressure on the suction side and high pressure on the exhaust side of the compressor, the heat exchanger outlet pipe temperature and input power of the outdoor unit, the return air temperature, on / off status and cooling capacity of each indoor unit; the historical environmental parameters include: outdoor ambient temperature.

[0023] In some embodiments of the present invention, when the multi-split system includes multiple compressors, the multiple compressors are connected in parallel.

[0024] In some embodiments of the present invention, the energy consumption determination device of the multi-split unit is connected to the outdoor unit through a communication interface and a collection interface, respectively. The communication interface is used to obtain the input power, the return air temperature, the power on / off status and the cooling capacity, and the collection interface is used to collect the exhaust temperature, the return air temperature, the low pressure on the intake side, the high pressure on the exhaust side and the heat exchanger outlet pipe temperature.

[0025] In some embodiments of the present invention, the multi-split unit further includes a four-way reversing valve, an outdoor unit heat exchanger, an oil separator, a gas-liquid separator, an air pipe stop valve and a liquid pipe stop valve, and the energy consumption determination device of the multi-split unit includes an exhaust temperature sensor, a return air temperature sensor, a low-pressure pressure sensor, a high-pressure pressure sensor, a liquid pipe temperature sensor and an ambient temperature sensor, wherein the exhaust temperature sensor is installed on the connecting pipe between the oil separator and the four-way reversing valve, the return air temperature sensor is installed on the connecting pipe between the gas-liquid separator and the compressor, the low-pressure pressure sensor is installed at the inspection port of the air pipe stop valve, the high-pressure pressure sensor is installed at the inspection port of the liquid pipe stop valve, the liquid pipe temperature sensor is installed on the connecting pipe between the outdoor unit heat exchanger and the liquid pipe stop valve, and the ambient temperature sensor is installed on the outer shell of the multi-split unit diagnostic device.

[0026] In some embodiments of the present invention, the energy consumption determination device for a multi-split system further includes a networking module, and the energy consumption determination device for a multi-split system is communicatively connected to the cloud server via the networking module.

[0027] To achieve the above-mentioned purpose, an embodiment of the third aspect of the present invention proposes a multi-split energy consumption determination system, which includes a cloud server and a multi-split energy consumption determination device as described in any one of the above-mentioned embodiments, and the cloud server is connected to the multi-split energy consumption determination device.

[0028] The energy consumption determination system for a multi-split system in an embodiment of the present invention includes a cloud server and the energy consumption determination device for a multi-split system in the above embodiment, which can improve the accuracy of energy consumption assessment and investment return period calculation of the multi-split system, thereby providing users with a basis for energy-saving transformation decision-making.

[0029] In some embodiments of the present invention, the cloud server is further connected to a terminal device, and is configured to send the corrected actual operating energy consumption of the multi-connected system to the terminal device via the cloud server.

[0030] To achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a computer-readable storage medium on which a multi-connected energy consumption determination program is stored. When the energy consumption determination program is executed by a processor, the multi-connected energy consumption determination method described in any one of the above-mentioned embodiments is implemented.

[0031] The computer-readable storage medium of an embodiment of the present invention can improve the accuracy of energy consumption assessment and investment return period calculation of the multi-split system by executing the energy consumption determination program of the multi-split system stored thereon through a processor, thereby providing users with a basis for energy-saving transformation decision-making.

[0032] To achieve the above-mentioned purpose, the fifth embodiment of the present invention proposes a device for determining the energy consumption of a multi-connected system, and the device includes: an acquisition module for acquiring historical operating parameters and historical environmental parameters of the multi-connected system at different times within a first preset time period; a fitting module for fitting the energy consumption correction correlation coefficient of the multi-connected system based on the historical operating parameters and the historical environmental parameters; the acquisition module is also used to acquire the operating parameters and environmental parameters of the multi-connected system within a second preset time period; a correction module for correcting the operating energy consumption of the multi-connected system within the second preset time period based on the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters, so as to determine the actual operating energy consumption of the multi-connected system within the second preset time period.

[0033] The energy consumption determination device of the multi-split unit in the embodiment of the present invention first obtains the historical operating parameters and historical environmental parameters of the multi-split unit within a first preset time period by an acquisition module, and then determines the energy consumption correction correlation coefficient based on the acquired historical operating parameters and historical environmental parameters. The correction module then performs energy consumption correction based on the operating parameters and environmental parameters within a second preset time period acquired by the acquisition module to determine the actual operating energy consumption of the multi-split unit within the second preset time period, thereby improving the accuracy of the energy consumption assessment of the multi-split unit and the accuracy of the investment return period calculation, so as to provide users with a basis for energy-saving transformation decision-making.

[0034] To achieve the above-mentioned purpose, a sixth embodiment of the present invention proposes a multi-split system, which includes the energy consumption determination device of the multi-split system described in any one of the above-mentioned embodiments.

[0035] The multi-split system of the embodiment of the present invention can improve the accuracy of energy consumption assessment and investment return period calculation of the multi-split system through the energy consumption determination device of the multi-split system in the above embodiment, thereby providing users with a basis for energy-saving transformation decision-making.

[0036] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a flow chart of a method for determining energy consumption of a multi-split system in one embodiment of the present invention;

[0038] Figure 2 is a flow chart of a method for determining energy consumption of a multi-split system in another embodiment of the present invention;

[0039] Figure 3 is a flow chart of a method for determining energy consumption of a multi-split system in another embodiment of the present invention;

[0040] Figure 4 is a flow chart of a method for determining energy consumption of a multi-split system in another embodiment of the present invention;

[0041] Figure 5 is a flow chart of a method for determining energy consumption of a multi-split system in another embodiment of the present invention;

[0042] Figure 6 It is a schematic diagram of a device for determining energy consumption of a multi-split system in one embodiment of the present invention;

[0043] Figure 7-1 1 is a schematic diagram of the structure of an outdoor unit of a multi-split system in one embodiment of the present invention;

[0044] Figure 7-2 1 is a schematic structural diagram of an outdoor unit of a multi-split system in another embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the connection of a device for determining energy consumption of a multi-split system in one embodiment of the present invention;

[0046] Figure 9 It is a schematic structural diagram of a device for determining energy consumption of a multi-split system in one embodiment of the present invention;

[0047] Figure 10 is a schematic diagram of a system for determining energy consumption of a multi-split system in one embodiment of the present invention;

[0048] Figure 11 is a schematic diagram of a system for determining energy consumption of a multi-split system in another embodiment of the present invention;

[0049] Figure 12 is a block diagram of an energy consumption determination device for a multi-split system in another embodiment of the present invention;

[0050] Figure 13 It is a structural block diagram of a multi-connection system in one embodiment of the present invention. DETAILED DESCRIPTION

[0051] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0052] The following describes a multi-split system and its energy consumption determination method, device, system, and storage medium according to embodiments of the present invention with reference to the accompanying drawings.

[0053] Figure 1 It is a flow chart of a method for determining energy consumption of a multi-split system in one embodiment of the present invention.

[0054] like Figure 1 As shown, the present invention proposes a method for determining energy consumption of a multi-split system, which includes the following steps:

[0055] S10, obtaining historical operating parameters and historical environmental parameters of the multi-connected system at different times within a first preset time period.

[0056] Specifically, to accurately determine the actual operating energy consumption of the VRF system, this embodiment can first obtain historical operating parameters and historical environmental parameters of the VRF system within a first preset period of time to assist in generating an energy consumption correction correlation coefficient. Specifically, multiple sensors can be configured to obtain the historical operating parameters and historical environmental parameters, wherein the sensor type can be set based on the type of the historical operating parameters and historical environmental parameters.

[0057] In some embodiments, a multi-split system includes a compressor, an outdoor unit, and multiple indoor units. Historical operating parameters include: the compressor's exhaust temperature, return air temperature, suction side low pressure, and exhaust side high pressure; the outdoor unit's heat exchanger outlet pipe temperature and input power; the return air temperature, power on / off status, and cooling capacity of each indoor unit; historical environmental parameters include: outdoor ambient temperature. Therefore, when setting sensors, you can set exhaust temperature sensors, return air temperature sensors, liquid pipe temperature sensors, high pressure sensors, low pressure sensors, ambient temperature sensors, etc.

[0058] In some embodiments, obtaining historical operating parameters and historical environmental parameters of the multi-connected system at different times within a first preset time period includes: obtaining the historical operating parameters and historical environmental parameters of the multi-connected system once every third preset time period within the first preset time period, wherein the first preset time period is greater than the third preset time period, and the first preset time period is an integer multiple of the third preset time period.

[0059] Specifically, in this embodiment, the first preset duration ranges from 7 days to 60 days, and the third preset duration can be 5 minutes, 10 minutes, or 15 minutes, for example, obtaining historical operating parameters and historical environmental parameters of the multi-connected system every 5 minutes. It should be noted that the operating parameters and environmental parameters of the multi-connected system can be recorded in the operation log during operation. By obtaining information from the operation log, the historical operating parameters and historical environmental parameters of the multi-connected system at different times within the first preset duration can be obtained. For example, the historical operating parameters and corresponding historical environmental parameters of the multi-connected system every 5 minutes over the past two weeks can be obtained.

[0060] S20, fitting the energy consumption correction correlation coefficient of the multi-split system according to the historical operating parameters and the historical environmental parameters.

[0061] Specifically, after obtaining the historical operating parameters and historical environmental parameters of the multi-connected unit, the energy consumption correction correlation coefficient can be fitted based on the historical operating parameters and historical environmental parameters. Specifically, the input power of the multi-connected unit obtained from the historical environmental parameters can be compared with the operating energy consumption calculated by combining other operating parameters and environmental parameters with the energy consumption calculation formula, so as to fit the energy consumption correction correlation coefficient in the energy consumption calculation formula. Subsequently, the modified energy consumption correction correlation coefficient can be directly applied to calculate the actual operating energy consumption of the multi-connected unit.

[0062] S30: Obtain operating parameters and environmental parameters of the multi-connected system within a second preset time period.

[0063] S40: Correct the operating energy consumption of the multi-split system within the second preset time period according to the energy consumption correction correlation coefficient, the operating parameters, and the environmental parameters to determine the actual operating energy consumption of the multi-split system within the second preset time period.

[0064] Specifically, the second preset duration may be the period for which the energy consumption of the multi-split system needs to be calculated. For example, when the energy consumption of the multi-split system needs to be calculated for the past year or the next year, the second preset duration may be the period for the past year or the next year. When the energy consumption of the multi-split system needs to be calculated for the past six months or the next six months, the second preset duration may be the period for the past six months or the next six months. The operating parameters in step S30 may not include the input power of the multi-split system. Instead, the actual operating energy consumption of the multi-split system may be calculated using other operating parameters and environmental parameters in combination with the energy consumption correction correlation coefficient.

[0065] In some embodiments of the present invention, Figure 2 As shown, step S20, fitting the energy consumption correction correlation coefficient of the multi-split system according to the historical operating parameters and the historical environmental parameters, includes:

[0066] S201, determining the partial load rate and theoretical energy consumption of the VRF at different times based on historical operating parameters and historical environmental parameters.

[0067] Specifically, after obtaining historical operating and environmental parameters at different times, the partial load rate and theoretical energy consumption of the VRF system at that moment can be determined based on these historical operating and environmental parameters. The partial load rate is the ratio between the VRF system's actual cooling capacity and its maximum cooling capacity, while the theoretical energy consumption is calculated using the energy consumption formula. Before correction, the theoretical energy consumption is used in information forecasts such as investment return period calculations, which can easily lead to inaccurate forecasts.

[0068] S202: Fitting the energy consumption correction correlation coefficient of the VRF based on historical operating parameters, historical environmental parameters, partial load rate, and theoretical energy consumption.

[0069] Specifically, after determining the partial load rate and theoretical energy consumption, an energy consumption correction coefficient to be fitted can be determined based on the partial load rate and historical environmental parameters. This energy consumption correction coefficient to be fitted is then fitted using the input power and theoretical energy consumption in the historical operating parameters to obtain an energy consumption correction correlation coefficient. In subsequent calculations, the actual operating energy consumption of the VRF can be calculated directly using this energy consumption correction correlation coefficient and the calculated theoretical energy consumption. The specific method for fitting the energy consumption correction correlation coefficient can be found in the detailed description of the following embodiments.

[0070] In this embodiment, if Figure 3 As shown, step S201, determining the partial load rate and theoretical energy consumption of the multi-split system at different times based on historical operating parameters and historical environmental parameters, includes:

[0071] S301, determining the actual cooling capacity of the multi-split unit based on the outdoor ambient temperature, the exhaust temperature, the return air temperature, the high pressure on the exhaust side, the low pressure on the return air side, the outlet pipe temperature of the heat exchanger, and the input power.

[0072] Specifically, this embodiment calculates the actual cooling capacity of a multi-split system using the compressor heat balance method, utilizing the outdoor ambient temperature, exhaust gas temperature, return gas temperature, exhaust high pressure, return low pressure, heat exchanger outlet pipe temperature, and input power. The outdoor ambient temperature indirectly affects the condensing pressure of the multi-split system's condenser and the enthalpy of the refrigerant at the condenser outlet. Therefore, incorporating the outdoor ambient temperature improves the accuracy of the actual cooling capacity calculation. The cooling capacity calculation formula can be expressed as Qreal=f(T4, Tp, T7, T5, Hp, Lp, Wreal). More specifically, in this embodiment, the actual cooling capacity of the multi-split unit can be calculated by Qreal=(h1-h3) / (h2-h1)*Wreal, where Qreal represents the actual cooling capacity (unit: kW), h1 represents the enthalpy value at the compressor suction port (unit: kJ / kg), which is determined by the low-pressure pressure Lp on the suction side and the return gas temperature T7 (needs to be combined with the refrigerant thermodynamic properties table), h2 represents the enthalpy value at the compressor exhaust port (unit: kJ / kg), which is determined by the high-pressure pressure Hp on the exhaust side and the exhaust temperature Tp, and h3 represents the enthalpy value of the liquid refrigerant at the condenser outlet (unit: kJ / kg), which is determined by the high-pressure pressure Hp on the exhaust side and the heat exchanger outlet pipe temperature T5 (subcooling needs to be considered).

[0073] It should be noted that the above-mentioned compressor heat balance method is only one method for calculating the actual cooling capacity. The actual cooling capacity can also be calculated by other calculation methods. The specific calculation method of the actual cooling capacity is not limited here.

[0074] S302: Determine the average return air temperature of the indoor unit according to the return air temperature, the on / off status, and the cooling capacity.

[0075] Specifically, the on / off states of multiple indoor units at different times are different, and the cooling capacity (horsepower) of each indoor unit is also different. Therefore, when calculating the average return air temperature of the indoor unit, the weight of the capacity of each indoor unit needs to be considered. More specifically, the average return air temperature of the indoor unit can be calculated using the formula T1average = Sum(Onoffn*HPn*T1n) / Sum(Onoffn*HPn), where T1average represents the average return air temperature, n ranges from 1 to n, representing the nth indoor unit, Onoffn is 1 when it indicates that the nth indoor unit is on, and 0 when it indicates that the nth indoor unit is off, HPn represents the cooling capacity of the nth indoor unit, T1n represents the return air temperature of the nth indoor unit, and Sum is a summation indicator.

[0076] It should be noted that the above method of calculating the average return air temperature is only an exemplary description. This embodiment can also calculate the average return air temperature through other calculation methods, and the specific calculation method of the average return air temperature is not limited here.

[0077] S303: Determine the maximum cooling capacity and maximum input power of the multi-split system according to the average return air temperature and the outdoor ambient temperature.

[0078] Specifically, after determining the average return air temperature T1average, the maximum cooling capacity and maximum input power of the multi-split unit can be calculated based on the average return air temperature T1average combined with the outdoor ambient temperature T4. Specifically, the formula a1+a2*T1average+a3*(T1average) can be used. 2 +a4*T4+a5*(T4) 2 +a6*T1average*T4, where a1-a6 is a correlation coefficient, which can be determined in advance based on the variable operating condition data of the multi-split unit. The specific determination method is not limited in this embodiment. It should be noted that the correlation coefficients corresponding to the maximum cooling capacity and the maximum input power are not the same.

[0079] S304: Determine a partial load rate according to the actual cooling capacity and the maximum cooling capacity.

[0080] Specifically, after the actual cooling capacity and the maximum cooling capacity are calculated, the partial load rate of the multi-split unit can be determined based on the actual cooling capacity and the maximum cooling capacity. Specifically, the ratio between the actual cooling capacity and the maximum cooling capacity can be determined as the partial load rate, that is, PLR = Qreal / Qfullload, where PLR ​​represents the partial load rate, Qreal represents the actual cooling capacity, and Qfullload represents the maximum cooling capacity.

[0081] S305: Determine the partial load rate power consumption according to the partial load rate.

[0082] Specifically, after determining the partial load rate PLR, since there is a correlation between the partial load rate PLR ​​and the partial load rate power consumption, the partial load rate power consumption can be determined by the partial load rate PLR. Specifically, it can be determined according to the formula Coefplr = c1 + c2 * PLR + c3 * (PLR) 2 +c4*(PLR) 3 Calculate the partial load rate power consumption, where Coefplr represents the partial load rate power consumption, PLR represents the partial load rate, and c1-c4 are correlation coefficients. The correlation coefficients can also be determined in advance based on the variable operating condition data of the multi-split unit. The specific determination method is not limited in this embodiment.

[0083] S306: Determine theoretical energy consumption according to the partial load rate power consumption and the maximum input power.

[0084] Specifically, after determining the partial load rate power consumption Coefplr and the maximum input power Wfullload, the product of the load rate power consumption Coefplr and the maximum input power Wfullload can be used as the theoretical energy consumption of the multi-split unit at that moment, that is, Wnominal = Wfullload*Coefplr, where Wnominal represents the theoretical energy consumption of the multi-split unit.

[0085] In some embodiments of the present invention, Figure 4 As shown, step S202 is to fit the energy consumption correction correlation coefficient of the multi-split system according to historical operating parameters, historical environmental parameters, partial load rate and theoretical energy consumption, including:

[0086] S401: Determine a first energy consumption correction coefficient according to input power and theoretical energy consumption.

[0087] Specifically, the input power of this embodiment can be obtained from the outdoor unit through a smart meter. The relationship between the input power and the theoretical energy consumption can determine the attenuation of the multi-split unit, thereby determining the energy consumption correction coefficient. Specifically, the input power can be determined by multiplying the theoretical energy consumption by the energy consumption correction coefficient, that is, the first energy consumption correction coefficient Coefattenuation1 = Wreal / Wnominal.

[0088] S402: Determine a second energy consumption correction coefficient according to the partial load rate, the outdoor ambient temperature, and the energy consumption correction correlation coefficient to be fitted.

[0089] Specifically, the second energy consumption correction coefficient is calculated by the calculation formula of the energy consumption correction coefficient, which can be specifically calculated by the formula Coefattenuation = d1 + d2 * PLR + d3 * (PLR) 2 +d4*T4+d5*(T4) 2 +d6*PLR*T4, where d1-d6 are the energy consumption correction coefficients to be fitted. d1-d6 have initial values, and the second energy consumption correction coefficient Coefattenuation2 is determined based on the initial values ​​combined with the partial load rate PLR ​​and the outdoor ambient temperature T4.

[0090] S403 : Fitting the energy consumption correction correlation coefficient to be fitted according to the first energy consumption correction coefficient and the second energy consumption correction coefficient to determine the energy consumption correction correlation coefficient.

[0091] Specifically, because the formula for calculating the second energy consumption correction coefficient includes the energy consumption correction correlation coefficient to be fitted, the second energy consumption correction coefficient is inaccurate. In this embodiment, the energy consumption correction correlation coefficient to be fitted is fitted using the first energy consumption correction coefficient until the second energy consumption correction coefficient at all times is the same as the first energy consumption correction coefficient, thereby determining the energy consumption correction correlation coefficients d1-d6. In subsequent calculations, the corrected energy consumption correction correlation coefficients can be directly applied to calculate the correct energy consumption correction coefficients, and the theoretical energy consumption can be corrected based on the energy consumption correction coefficients to determine the actual operating energy consumption of the multi-split system.

[0092] In some embodiments of the present invention, the operating energy consumption of the multi-connected system within the second preset time period is corrected according to the energy consumption correction correlation coefficient, operating parameters and environmental parameters, including: determining the energy consumption correction model of the multi-connected system within the second preset time period according to the energy consumption correction correlation coefficient, operating parameters and environmental parameters, and determining the operating energy consumption of the multi-connected system within the second preset time period according to the operating parameters and environmental parameters; and correcting the operating energy consumption through the energy consumption correction model.

[0093] Specifically, since the energy consumption correction correlation coefficient has been determined, this embodiment can determine the partial load rate within the second preset time period based on the operating parameters and environmental parameters, and then determine the energy consumption correction model for the second preset time period based on the partial load rate and the outdoor ambient temperature, that is, the energy consumption correction coefficient. In addition, the operating energy consumption within the second preset time period can also be calculated based on the operating parameters and environmental parameters. For details, please refer to the calculation process of the theoretical energy consumption in the above embodiment, which will not be repeated here. After determining the operating energy consumption and energy consumption correction coefficient of the multi-split system within the second preset time period, the operating energy consumption is corrected by the energy consumption correction coefficient, that is, the product of the two is used as the actual operating energy consumption of the multi-split system within the second preset time period.

[0094] In this embodiment, if Figure 5 As shown, the method for determining the energy consumption of a multi-split system also includes:

[0095] S501: Divide the second preset duration into multiple time periods.

[0096] S502: Obtain operating parameters and environmental parameters corresponding to each time period.

[0097] S503, determining an energy consumption correction model corresponding to each time period according to the energy consumption correction correlation coefficient, the operating parameters and environmental parameters corresponding to each time period, and determining the operating energy consumption of the multi-split system in each time period according to the operating parameters and environmental parameters corresponding to each time period.

[0098] S504: Correct the corresponding operating energy consumption using the energy consumption correction model corresponding to each time period to obtain the actual operating energy consumption of each time period.

[0099] S505 , summing the actual operating energy consumption in each time period to determine the actual operating energy consumption for the second preset time period.

[0100] Specifically, unlike the previous embodiment, this embodiment divides the second preset duration into multiple time periods. The calculation process of each time period can refer to the implementation method of the above embodiment, that is, each time period has a corresponding energy consumption correction coefficient and operating energy consumption. The energy consumption correction coefficient of each time period is used to correct the corresponding operating energy consumption, and the actual operating energy consumption of each time period can be obtained. The actual operating energy consumption of each time period is then summed to obtain the total actual operating energy consumption of the second preset duration. It should be noted that this processing method can improve the calculation accuracy of the actual operating energy consumption. In this embodiment, the division of time periods can be determined according to the length of the second preset duration. For example, if the second preset duration is one year, each time period can be one week, half a month, or one month. If the second preset duration is one day or one week, each time period can be one hour, one quarter of an hour, or every five minutes. That is, there is a positive correlation between the length of the time period and the second preset duration, so as to improve the calculation speed while ensuring the calculation accuracy.

[0101] In summary, the energy consumption determination method of the multi-split unit in the embodiment of the present invention first obtains the historical operating parameters and historical environmental parameters of the multi-split unit within a first preset time period, then determines the energy consumption correction correlation coefficient based on the acquired historical operating parameters and historical environmental parameters, and then performs energy consumption correction in combination with the operating parameters and environmental parameters within a second preset time period to determine the actual operating energy consumption of the multi-split unit within the second preset time period, thereby improving the energy consumption assessment accuracy of the multi-split unit and the accuracy of the investment return period calculation, so as to provide users with a basis for energy-saving transformation decision-making.

[0102] Figure 6 It is a schematic diagram of a device for determining energy consumption of a multi-split system in one embodiment of the present invention.

[0103] Furthermore, if Figure 6 As shown, the present invention proposes an energy consumption determination device 600 for a multi-split system, which is respectively connected to the outdoor unit and the cloud server of the multi-split system. The energy consumption determination device 600 for the multi-split system is used to: obtain historical operating parameters and historical environmental parameters of the multi-split system at different times within a first preset time period, and upload them to the cloud server, so that the cloud server fits the energy consumption correction correlation coefficient of the multi-split system according to the historical operating parameters and historical environmental parameters; obtain operating parameters and environmental parameters of the multi-split system within a second preset time period, and upload them to the cloud server, so that the cloud server corrects the operating energy consumption of the multi-split system within the second preset time period according to the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters, and determines the actual operating energy consumption of the multi-split system within the second preset time period.

[0104] Specifically, the energy consumption determination device 600 of the multi-split system in this embodiment is respectively connected to the outdoor unit and cloud server of the multi-split system, and is used to obtain and upload the historical operating parameters and historical environmental parameters of the multi-split system within a first preset time period to the cloud server, so that the cloud server can determine the energy consumption correction correlation coefficient based on the acquired historical operating parameters and historical environmental parameters, and then obtain and upload the operating parameters and environmental parameters within a second preset time period to correct the energy consumption to the cloud server, so that the cloud server can determine the actual operating energy consumption of the multi-split system within the second preset time period, thereby improving the energy consumption assessment accuracy of the multi-split system and the accuracy of the investment return period calculation, so as to provide users with a basis for energy-saving transformation decisions.

[0105] In some embodiments of the present invention, the multi-split system includes an outdoor unit, at least one compressor and multiple indoor units. The historical operating parameters include: the exhaust temperature, return air temperature, low pressure on the suction side and high pressure on the exhaust side of the compressor, the heat exchanger outlet pipe temperature and input power of the outdoor unit, the return air temperature, power on / off status and cooling capacity of each indoor unit; the historical environmental parameters include: outdoor ambient temperature.

[0106] It should be noted that the way in which the energy consumption determination device 600 of the multi-split system obtains historical operating parameters and historical environmental parameters through the outdoor unit can be found in the description of the above-mentioned related embodiments, and the process in which the cloud server determines the energy consumption correction correlation coefficient and corrects the operating energy consumption can also be found in the description of the above-mentioned related embodiments. To avoid redundancy, they will not be repeated here.

[0107] In some embodiments of the present invention, Figure 7-1 and 7-2 As shown, when the multi-split system includes multiple compressors, the multiple compressors are connected in parallel.

[0108] Specifically, Figure 7-1This is a schematic diagram of a multi-split system including one compressor. Figure 7-2 This is a schematic diagram of a multi-split system including two compressors, where the two compressors are connected in parallel to provide higher power cooling / heating capacity.

[0109] In this embodiment, the energy consumption determination device of the multi-split unit is connected to the outdoor unit through a communication interface and a collection interface respectively. The communication interface is used to obtain input power, return air temperature, power on / off status and cooling capacity, and the collection interface is used to collect exhaust temperature, return air temperature, low pressure on the intake side, high pressure on the exhaust side and heat exchanger outlet pipe temperature.

[0110] Specifically, see Figure 8 The energy consumption determination device 600 for a multi-split system is equipped with a communication interface and a data collection interface. The communication interface can acquire the outdoor unit's input power Wreal. Specifically, Wreal can be acquired by establishing communication with a third-party smart meter. The smart meter can use direct or mutual induction methods to collect the outdoor unit's input power. The energy consumption determination device 600 and the smart meter support the DL / T645-1997 or DL / T645-2007 communication protocol. Furthermore, the indoor unit's on / off status, return air temperature T1, and cooling capacity HP can also be acquired via the general selection interface. Specifically, the energy consumption determination device 600 communicates with the outdoor unit's external communication port. The outdoor unit acquires the on / off status, return air temperature T1, and cooling capacity HP of its associated multiple indoor units and transmits them to the energy consumption determination device 600 via the communication interface. The energy consumption determination device 600 of the multi-split unit is also provided with a data collection interface, which collects the exhaust temperature Tp, the return air temperature T7, the suction side low pressure Lp, the exhaust side high pressure Hp and the heat exchanger outlet pipe temperature T5.

[0111] That is to say, Figure 8 Interfaces 7 and 8 are both communication interfaces, while interfaces 1-6 are data collection interfaces. It should be noted that the energy consumption determination device 600 in this embodiment also includes another communication interface 9, which is used to connect to an antenna for connection to the cloud server. Alternatively, the cloud server can directly obtain current actual meteorological parameters via the Internet, or it can receive corresponding information input from a smart terminal, such as parameters on a multi-link nameplate.

[0112] In some embodiments of the present invention, see Figure 7-1 or Figure 7-2It can be seen that the multi-split system also includes a four-way reversing valve, an outdoor unit heat exchanger, an oil separator, a gas-liquid separator, an air pipe stop valve and a liquid pipe stop valve. The energy consumption determination device of the multi-split system includes an exhaust temperature sensor, a return air temperature sensor, a low-pressure pressure sensor, a high-pressure pressure sensor, a liquid pipe temperature sensor and an ambient temperature sensor, wherein the exhaust temperature sensor is installed on the connecting pipe between the oil separator and the four-way reversing valve, the return air temperature sensor is installed on the connecting pipe between the gas-liquid separator and the compressor, the low-pressure pressure sensor is installed at the inspection port of the air pipe stop valve, the high-pressure pressure sensor is installed at the inspection port of the liquid pipe stop valve, the liquid pipe temperature sensor is installed on the connecting pipe between the outdoor unit heat exchanger and the liquid pipe stop valve, and the ambient temperature sensor is installed on the outer shell of the multi-split system diagnostic device.

[0113] Specifically, Figure 7-1 Take an example for explanation, where position A, i.e., the pipeline between the oil separator and the four-way reversing valve, is used to install the exhaust temperature sensor, and position B, i.e., the pipeline between the gas-liquid separator and the compressor, is used to install the return air temperature sensor; it should be noted that if the energy consumption determination device 600 of the multi-split unit is installed on the back of the top-outlet outdoor unit and cannot be installed at position B due to the length limit of the sensor connection line, the return air temperature sensor can be installed on the pipeline between the refrigerant charging valve and the gas-liquid separator; position C, i.e., the management between the outdoor unit heat exchanger and the liquid pipe stop valve, is used to install the liquid pipe temperature sensor; and the low-pressure pressure sensor and the high-pressure pressure sensor are installed corresponding to the gas pipe stop valve and the liquid pipe stop valve respectively, and can be specifically installed at the detection ports of the gas pipe stop valve and the liquid pipe stop valve, which is convenient for replacement or maintenance.

[0114] See also Figure 9 The energy consumption determination device 600 is also provided with an ambient temperature sensor installation position 901. The ambient temperature sensor can be snapped onto position 901 to detect the outdoor ambient temperature. In addition, the energy consumption determination device 600 also includes a networking module, and is further provided with a networking module installation position 902, a strong current wire hole 903, and a weak current wire hole 904. Among them, the networking module installation position 902 can be used to install an antenna for the energy consumption determination device 600 to communicate with the cloud server. The strong current wire hole 903 is used to provide a wire hole for the 220V AC power line, and the weak current wire hole 904 is used to provide a wire hole for the weak current wires such as the sensor connection line and communication line. This can avoid the relevant interference between weak current and strong current, ensure the accuracy of the collected data, and further improve the correction accuracy of the actual operating energy consumption.

[0115] In summary, the energy consumption determination device of the multi-split system in this embodiment can determine the actual operating energy consumption of the multi-split system, improve the accuracy of the energy consumption assessment of the multi-split system and the accuracy of the investment return period calculation, thereby providing users with a basis for energy-saving transformation decision-making.

[0116] Figure 10 Schematic diagram of a system for determining energy consumption of a multi-split system in one embodiment of the present invention.

[0117] Furthermore, if Figure 10 As shown, the present invention proposes a multi-connected energy consumption determination system 100, which includes a cloud server 101 and a multi-connected energy consumption determination device 600 in any one of the above embodiments, wherein the cloud server 101 is connected to the multi-connected energy consumption determination device 600.

[0118] In some embodiments of the present invention, Figure 11 As shown, the cloud server 101 is also connected to the terminal device, and is used to send the actual operating energy consumption after multi-connection correction to the terminal device through the cloud server 101.

[0119] It should be noted that the specific execution steps of the cloud server 101 and the multi-connected energy consumption determination device 600 in this embodiment can refer to the relevant description of the above embodiment. In addition, the information transmission between the cloud server 101 and the terminal device can refer to the above embodiment about Figure 8 To avoid redundancy, the description will not be repeated here.

[0120] In summary, the energy consumption determination system for a multi-split system in an embodiment of the present invention includes a cloud server and the energy consumption determination device for a multi-split system in the above embodiment, which can improve the accuracy of energy consumption assessment and investment return period calculation of the multi-split system, thereby providing users with a basis for energy-saving transformation decision-making.

[0121] Furthermore, the present invention proposes a computer-readable storage medium having a multi-split energy consumption determination program stored thereon. When the energy consumption determination program is executed by a processor, any of the multi-split energy consumption determination methods in the above embodiments is implemented.

[0122] The computer-readable storage medium of an embodiment of the present invention can improve the accuracy of energy consumption assessment and investment return period calculation of the multi-split system by executing the energy consumption determination program of the multi-split system stored thereon through a processor, thereby providing users with a basis for energy-saving transformation decision-making.

[0123] Figure 12 It is a block diagram of a device for determining energy consumption of a multi-split system in another embodiment of the present invention.

[0124] Furthermore, if Figure 12 As shown, the present invention proposes another energy consumption determination device 600 for a multi-connected system. The energy consumption determination device 600 includes an acquisition module 1201 , a fitting module 1202 and a correction module 1203 .

[0125] The acquisition module 1201 is used to obtain the historical operating parameters and historical environmental parameters of the multi-connected system at different times within a first preset time period; the fitting module 1202 is used to fit the energy consumption correction correlation coefficient of the multi-connected system based on the historical operating parameters and historical environmental parameters; the acquisition module 1201 is also used to obtain the operating parameters and environmental parameters of the multi-connected system within a second preset time period; the correction module 1203 is used to correct the operating energy consumption of the multi-connected system within the second preset time period based on the energy consumption correction correlation coefficient, operating parameters and environmental parameters, so as to determine the actual operating energy consumption of the multi-connected system within the second preset time period.

[0126] In some embodiments of the present invention, the fitting module 1202 is used to determine the partial load rate and theoretical energy consumption of the multi-split system at different times based on historical operating parameters and historical environmental parameters; and to fit the energy consumption correction correlation coefficient of the multi-split system based on historical operating parameters, historical environmental parameters, partial load rate and theoretical energy consumption.

[0127] In some embodiments of the present invention, a multi-split system includes a compressor, an outdoor unit and multiple indoor units, and the historical operating parameters include: the exhaust temperature, return air temperature, low pressure on the suction side and high pressure on the exhaust side of the compressor, the heat exchanger outlet pipe temperature and input power of the outdoor unit, the return air temperature, power on / off status and cooling capacity of each indoor unit; the historical environmental parameters include: outdoor ambient temperature.

[0128] In some embodiments of the present invention, the fitting module 1202 is used to determine the actual cooling capacity of the multi-split unit based on the outdoor ambient temperature, exhaust temperature, return air temperature, exhaust side high pressure, return air side low pressure, heat exchanger outlet pipe temperature and input power; determine the average return air temperature of the indoor unit based on the return air temperature, on / off status and cooling capacity; determine the maximum cooling capacity and maximum input power of the multi-split unit based on the average return air temperature and the outdoor ambient temperature; determine the partial load rate based on the actual cooling capacity and the maximum cooling capacity; determine the partial load rate power consumption based on the partial load rate; and determine the theoretical energy consumption based on the partial load rate power consumption and the maximum input power.

[0129] In some embodiments of the present invention, the fitting module 1202 is used to determine a first energy consumption correction coefficient based on the input power and theoretical energy consumption; determine a second energy consumption correction coefficient based on the partial load rate, the outdoor ambient temperature and the energy consumption correction correlation coefficient to be fitted; and fit the energy consumption correction correlation coefficient to be fitted based on the first energy consumption correction coefficient and the second energy consumption correction coefficient to determine the energy consumption correction correlation coefficient.

[0130] In some embodiments of the present invention, the correction module 1203 is used to determine the energy consumption correction model of the multi-connected system within the second preset time period based on the energy consumption correction correlation coefficient, operating parameters and environmental parameters, and to determine the operating energy consumption of the multi-connected system within the second preset time period based on the operating parameters and environmental parameters; and to correct the operating energy consumption through the energy consumption correction model.

[0131] In some embodiments of the present invention, the correction module 1203 is also used to divide the second preset time length into multiple time periods; obtain the operating parameters and environmental parameters corresponding to each time period; determine the energy consumption correction model corresponding to each time period based on the energy consumption correction correlation coefficient, the operating parameters and environmental parameters corresponding to each time period, and determine the operating energy consumption of the multi-connected machine in each time period based on the operating parameters and environmental parameters corresponding to each time period; correct the corresponding operating energy consumption through the energy consumption correction model corresponding to each time period to obtain the actual operating energy consumption of each time period; sum the actual operating energy consumption of each time period to determine the actual operating energy consumption of the second preset time length.

[0132] In some embodiments of the present invention, the acquisition module 1201 is used to obtain the historical operating parameters and historical environmental parameters of the multi-connected system once every third preset time period within a first preset time period, wherein the first preset time period is greater than the third preset time period, and the first preset time period is an integer multiple of the third preset time period.

[0133] It should be noted that the specific implementation of the energy consumption determination device of the multi-split system in the embodiment of the present invention can refer to the specific implementation of the energy consumption determination method of the multi-split system in the above embodiment, and will not be described again here to avoid redundancy.

[0134] In summary, the energy consumption determination device for a multi-split system in the embodiment of the present invention can improve the accuracy of energy consumption assessment and investment return period calculation of the multi-split system, thereby providing users with a basis for energy-saving transformation decision-making.

[0135] Figure 13 It is a structural block diagram of a multi-connection system in one embodiment of the present invention.

[0136] Furthermore, if Figure 13 As shown, the present invention proposes a multi-split machine 130, which includes the energy consumption determination device 600 of any of the above embodiments.

[0137] The multi-split system of the embodiment of the present invention can improve the accuracy of energy consumption assessment and investment return period calculation of the multi-split system through the energy consumption determination device of the multi-split system in the above embodiment, thereby providing users with a basis for energy-saving transformation decision-making.

[0138] In addition, other structures and functions of the multi-split system in the embodiment of the present invention are known to those skilled in the art and will not be described here in detail to reduce redundancy.

[0139] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device), or in conjunction with such instruction execution system, apparatus, or device. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device, or in conjunction with such instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion having one or more wires (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0140] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0141] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0142] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore should not be understood as limiting the present invention.

[0143] In addition, the terms "first" and "second" used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in this embodiment. Therefore, the features defined by the terms "first" and "second" in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of such features. In the description of the present invention, the word "plurality" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0144] In the present invention, unless otherwise clearly specified or limited in the embodiments, the terms "installed," "connected," "connect," and "fixed" appearing in the embodiments should be understood in a broad sense. For example, the connection may be a fixed connection, a detachable connection, or an integral connection. It can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or an interaction between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood based on the specific implementation.

[0145] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0146] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for determining energy consumption of a multi-split system, characterized in that: The method comprises: Obtaining historical operating parameters and historical environmental parameters of the multi-connected system at different times within a first preset time period; Fitting the energy consumption correction correlation coefficient of the multi-split system according to the historical operating parameters and the historical environmental parameters; Obtaining operating parameters and environmental parameters of the multi-connected system within a second preset time period; The operating energy consumption of the multi-connected system within the second preset time period is corrected according to the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters to determine the actual operating energy consumption of the multi-connected system within the second preset time period.

2. The method for determining energy consumption of a multi-split system according to claim 1, characterized in that: Fitting the energy consumption correction correlation coefficient of the multi-split system according to the historical operating parameters and the historical environmental parameters includes: Determining the partial load rate and theoretical energy consumption of the multi-split system at different times according to the historical operating parameters and the historical environmental parameters; An energy consumption correction correlation coefficient of the multi-split unit is fitted according to the historical operating parameters, the historical environmental parameters, the partial load rate and the theoretical energy consumption.

3. The method for determining energy consumption of a multi-split system according to claim 2, characterized in that: The multi-split system includes a compressor, an outdoor unit and multiple indoor units. The historical operating parameters include: the exhaust temperature, return air temperature, low pressure on the intake side and high pressure on the exhaust side of the compressor, the heat exchanger outlet pipe temperature and input power of the outdoor unit, the return air temperature, power on / off status and cooling capacity of each indoor unit; the historical environmental parameters include: outdoor ambient temperature.

4. The method for determining energy consumption of a multi-split system according to claim 3, characterized in that: Determining the partial load rate and theoretical energy consumption of the multi-split system at different times according to the historical operating parameters and the historical environmental parameters includes: Determine the actual cooling capacity of the multi-split unit according to the outdoor ambient temperature, the exhaust temperature, the return air temperature, the exhaust side high pressure, the return air side low pressure, the heat exchanger outlet pipe temperature and the input power; determining an average return air temperature of the indoor unit according to the return air temperature, the on / off state, and the cooling capacity; Determine the maximum cooling capacity and maximum input power of the multi-split unit according to the average return air temperature and the outdoor ambient temperature; determining the part load rate according to the actual cooling capacity and the maximum cooling capacity; determining a part load rate power consumption according to the part load rate; The theoretical energy consumption is determined according to the partial load rate power consumption and the maximum input power.

5. The method for determining energy consumption of a multi-split system according to claim 3, wherein: Fitting the energy consumption correction correlation coefficient of the multi-split unit according to the historical operating parameters, the historical environmental parameters, the partial load rate, and the theoretical energy consumption includes: determining a first energy consumption correction coefficient according to the input power and the theoretical energy consumption; determining a second energy consumption correction coefficient according to the partial load rate, the outdoor ambient temperature, and the energy consumption correction correlation coefficient to be fitted; The energy consumption correction correlation coefficient to be fitted is fitted according to the first energy consumption correction coefficient and the second energy consumption correction coefficient to determine the energy consumption correction correlation coefficient.

6. The method for determining energy consumption of a multi-split system according to claim 1, characterized in that: Correcting the operating energy consumption of the multi-split system within a second preset time period according to the energy consumption correction correlation coefficient, the operating parameters, and the environmental parameters includes: Determining an energy consumption correction model for the multi-split system within a second preset time period based on the energy consumption correction correlation coefficient, the operating parameters, and the environmental parameters, and determining the operating energy consumption of the multi-split system within the second preset time period based on the operating parameters and the environmental parameters; The operating energy consumption is corrected using the energy consumption correction model.

7. The method for determining energy consumption of a multi-split system according to claim 6, characterized in that: The method further comprises: Dividing the second preset time into multiple time periods; Obtain the operating parameters and environmental parameters corresponding to each time period; Determining an energy consumption correction model corresponding to each time period according to the energy consumption correction correlation coefficient, the operating parameters and environmental parameters corresponding to each time period, and determining the operating energy consumption of the multi-split system in each time period according to the operating parameters and environmental parameters corresponding to each time period; Correcting the corresponding operating energy consumption using the energy consumption correction model corresponding to each time period to obtain the actual operating energy consumption for each time period; The actual operating energy consumption of each time period is summed to determine the actual operating energy consumption of the second preset time period.

8. The method for determining energy consumption of a multi-split system according to claim 1, characterized in that: Obtaining historical operating parameters and historical environmental parameters of the multi-connected system at different times within a first preset time period, including: Within the first preset time period, historical operating parameters and historical environmental parameters of the multi-connected system are obtained once every third preset time period, wherein the first preset time period is greater than the third preset time period, and the first preset time period is an integer multiple of the third preset time period.

9. A device for determining energy consumption of a multi-connected system, characterized in that: The energy consumption determination device of the multi-split system is connected to the outdoor unit of the multi-split system and the cloud server respectively, and the energy consumption determination device of the multi-split system is used to: Obtaining historical operating parameters and historical environmental parameters of the multi-split system at different times within a first preset time period, and uploading the historical operating parameters and historical environmental parameters to the cloud server, so that the cloud server fits the energy consumption correction correlation coefficient of the multi-split system according to the historical operating parameters and the historical environmental parameters; The operating parameters and environmental parameters of the multi-connected system within the second preset time period are obtained and uploaded to the cloud server, so that the cloud server corrects the operating energy consumption of the multi-connected system within the second preset time period according to the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters, and determines the actual operating energy consumption of the multi-connected system within the second preset time period.

10. The device for determining energy consumption of a multi-split system according to claim 9, characterized in that: The multi-split unit includes an outdoor unit, at least one compressor and multiple indoor units. The historical operating parameters include: the exhaust temperature, return air temperature, low pressure on the suction side and high pressure on the exhaust side of the compressor, the heat exchanger outlet pipe temperature and input power of the outdoor unit, the return air temperature, power on / off status and cooling capacity of each indoor unit; the historical environmental parameters include: outdoor ambient temperature.

11. The device for determining energy consumption of a multi-split system according to claim 10, characterized in that: When the multi-split system includes multiple compressors, the multiple compressors are connected in parallel.

12. The device for determining energy consumption of a multi-split system according to claim 10, wherein: The energy consumption determination device of the multi-split unit is connected to the outdoor unit through a communication interface and a collection interface respectively. The communication interface is used to obtain the input power, the return air temperature, the power on / off status and the cooling capacity. The collection interface is used to collect the exhaust temperature, the return air temperature, the low pressure on the intake side, the high pressure on the exhaust side and the heat exchanger outlet pipe temperature.

13. The device for determining energy consumption of a multi-split system according to claim 10, wherein: The multi-split system further includes a four-way reversing valve, an outdoor unit heat exchanger, an oil separator, a gas-liquid separator, a gas pipe stop valve, and a liquid pipe stop valve. The energy consumption determination device of the multi-split system includes an exhaust temperature sensor, a return air temperature sensor, a low pressure sensor, a high pressure sensor, a liquid pipe temperature sensor, and an ambient temperature sensor. Among them, the exhaust temperature sensor is installed on the connecting pipe between the oil separator and the four-way reversing valve, the return air temperature sensor is installed on the connecting pipe between the gas-liquid separator and the compressor, the low-pressure pressure sensor is installed at the inspection port of the gas pipe stop valve, the high-pressure pressure sensor is installed at the inspection port of the liquid pipe stop valve, the liquid pipe temperature sensor is installed on the connecting pipe between the outdoor unit heat exchanger and the liquid pipe stop valve, and the ambient temperature sensor is installed on the outer shell of the multi-connected diagnostic device.

14. The device for determining energy consumption of a multi-split system according to claim 9, wherein: The energy consumption determination device for the multi-split system further includes a networking module, and the energy consumption determination device for the multi-split system is communicatively connected to the cloud server via the networking module.

15. A system for determining energy consumption of a multi-connected system, characterized in that: The energy consumption determination system for a multi-split system includes a cloud server and the energy consumption determination device for a multi-split system according to any one of claims 9 to 14, and the cloud server is connected to the energy consumption determination device for the multi-split system.

16. The energy consumption determination system for a multi-split system according to claim 15, characterized in that: The cloud server is also connected to the terminal device and is used to send the corrected actual operating energy consumption of the multi-connected system to the terminal device through the cloud server.

17. A computer-readable storage medium, characterized in that An energy consumption determination program for a multi-split system is stored thereon, and when the energy consumption determination program is executed by a processor, the energy consumption determination method for a multi-split system as claimed in any one of claims 1 to 7 is implemented.

18. A device for determining energy consumption of a multi-connected system, characterized in that: The device comprises: An acquisition module, configured to acquire historical operating parameters and historical environmental parameters of the multi-connected system at different times within a first preset time period; A fitting module, configured to fit the energy consumption correction correlation coefficient of the multi-split system according to the historical operating parameters and the historical environmental parameters; The acquisition module is further configured to acquire operating parameters and environmental parameters of the multi-connected system within a second preset time period; The correction module is used to correct the operating energy consumption of the multi-split system within the second preset time period according to the energy consumption correction correlation coefficient, the operating parameters and the environmental parameters to determine the actual operating energy consumption of the multi-split system within the second preset time period.

19. A multi-link system, characterized in that: The multi-split system includes the energy consumption determination device of any one of claims 9 to 14 or the multi-split system according to claim 18.

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