Air conditioner and method for calculating capacity of air conditioner

Abstract

The application discloses an air conditioner and a capacity calculation method of the air conditioner, which comprises: a refrigeration circuit, wherein refrigerant is circulated through a compressor, an outdoor heat exchanger, an expansion valve and an indoor heat exchanger in sequence, one of the outdoor heat exchanger and the indoor heat exchanger is a condenser, and the other is an evaporator; a temperature detection device for detecting suction temperature and discharge temperature of the indoor heat exchanger; a controller; a pre-constructed energy efficiency calculation model is matched according to the operation condition of the air conditioner; the operation energy efficiency is calculated according to the energy efficiency calculation model and in combination with the suction temperature and the discharge temperature during the operation of the air conditioner; the operation power of the air conditioner is obtained, and the capacity value of the air conditioner is calculated according to the operation power and the operation energy efficiency. The application has high detection precision and can reduce the operation capacity and memory requirement of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an air conditioner and a method for calculating the capacity of an air conditioner. Background Technology

[0002] Existing air conditioners all have capacity calculation functions. Through calculation, it is possible to know the current cooling capacity of the air conditioning system, whether it matches the nominal parameters on the product nameplate, and to monitor the performance of the controller.

[0003] Currently, calculating air conditioner capacity requires measuring the temperature and pressure at the evaporator inlet and outlet to determine the evaporator's inlet and outlet enthalpies. The mass flow rate of the refrigerant entering the evaporator is then calculated using the opening of the indoor unit's electronic expansion valve, and the capacity is calculated using the enthalpy difference method. Existing capacity calculation methods all involve fluid enthalpy calculations, which require extensive fitting operations or embedding of physical property parameter tables, placing high demands on the machine's computing power and memory. Furthermore, the enthalpy calculation method is significantly affected by the accuracy of the temperature detection device, and is easily influenced by poor installation location of the temperature detection device, leading to low accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide an air conditioner and an air conditioner capacity calculation method, which has high detection accuracy and can reduce the computing power and memory requirements of the air conditioner.

[0005] This invention provides an air conditioner, comprising:

[0006] The refrigeration circuit circulates the refrigerant sequentially through the compressor, outdoor heat exchanger, expansion valve, and indoor heat exchanger. One of the outdoor heat exchanger and the indoor heat exchanger serves as a condenser, and the other serves as an evaporator.

[0007] A temperature detection device is used to detect the intake temperature and exhaust temperature of the indoor heat exchanger;

[0008] The controller is configured as follows:

[0009] The pre-built energy efficiency calculation model is matched according to the operating conditions of the air conditioner;

[0010] Based on the energy efficiency calculation model, and combined with the air intake temperature and exhaust temperature of the air conditioner during operation, the operating energy efficiency is calculated.

[0011] Obtain the operating power of the air conditioner, and calculate the air conditioner's capacity value based on the operating power and the operating energy efficiency.

[0012] Preferably, the air conditioner's capacity value is the product of its operating power and its operating energy efficiency.

[0013] Preferably, the process of the controller constructing the energy efficiency calculation model specifically includes:

[0014] The air conditioner is configured under different operating conditions, and the operating frequency of the compressor is adjusted accordingly;

[0015] Obtain the compressor's current intake temperature, current discharge temperature, current operating power, and current capacity value under different operating conditions and at different operating frequencies;

[0016] Calculate the current operating energy efficiency at different operating frequencies based on the current capacity value and current operating power.

[0017] The current operating energy efficiency, current intake temperature, and current exhaust temperature under different operating frequencies under different operating conditions are input into a preset energy efficiency fitting model to be trained for fitting. The model fitting parameters for different operating conditions are calculated, and then the energy efficiency calculation model for different operating conditions is obtained.

[0018] As a preferred embodiment, the controller is configured to:

[0019] When the air conditioner is in cooling mode, a corresponding cooling energy efficiency calculation model is matched.

[0020] The cooling energy efficiency calculation model is EER=E*(α1+α2*(TX+TP)+α3*(TX) 2 +TP 2 +TX*TP)+α4*(TX 3 +TP 3 +TX 2 *TP+TP 2 *TX);

[0021] Where EER is the operating energy efficiency under refrigeration conditions, E is the refrigeration energy efficiency correction fitting parameter, α1, α2, α3 and α4 are the model fitting parameters, TX is the intake temperature, and TP is the exhaust temperature.

[0022] As a preferred embodiment, the controller is configured to:

[0023] When the air conditioner is in heating mode, a corresponding heating energy efficiency calculation model is matched.

[0024] The heating efficiency calculation model is COP=C*(α5+α6*(TX+TP)+α7*(TX) 2 +TP 2 +TX*TP)+α8*(TX 3 +TP 3 +TX 2 *TP+TP 2 *TX);

[0025] Wherein, COP is the operating energy efficiency under heating conditions, C is the heating energy efficiency correction fitting parameter, α5, α6, α7 and α8 are the model fitting parameters, TX is the intake temperature, and TP is the exhaust temperature.

[0026] This invention also provides a method for calculating the capacity of an air conditioner, the air conditioner comprising:

[0027] The refrigeration circuit circulates the refrigerant sequentially through the compressor, outdoor heat exchanger, expansion valve, and indoor heat exchanger. One of the outdoor heat exchanger and the indoor heat exchanger serves as a condenser, and the other serves as an evaporator.

[0028] A temperature detection device is used to detect the intake temperature and exhaust temperature of the indoor heat exchanger;

[0029] Controller;

[0030] The method includes:

[0031] The pre-built energy efficiency calculation model is matched according to the operating conditions of the air conditioner;

[0032] Based on the energy efficiency calculation model, and combined with the air intake temperature and exhaust temperature of the air conditioner during operation, the operating energy efficiency is calculated.

[0033] Obtain the operating power of the air conditioner, and calculate the air conditioner's capacity value based on the operating power and the operating energy efficiency.

[0034] Preferably, the air conditioner's capacity value is the product of its operating power and its operating energy efficiency.

[0035] Preferably, the process of the controller constructing the energy efficiency calculation model specifically includes:

[0036] The air conditioner is configured under different operating conditions, and the operating frequency of the compressor is adjusted accordingly;

[0037] Obtain the compressor's current intake temperature, current discharge temperature, current operating power, and current capacity value under different operating conditions and at different operating frequencies;

[0038] Calculate the current operating energy efficiency at different operating frequencies based on the current capacity value and current operating power.

[0039] The current operating energy efficiency, current intake temperature, and current exhaust temperature under different operating frequencies under different operating conditions are input into a preset energy efficiency fitting model to be trained for fitting. The model fitting parameters for different operating conditions are calculated, and then the energy efficiency calculation model for different operating conditions is obtained.

[0040] Preferably, the step of matching the pre-built energy efficiency calculation model according to the operating conditions of the air conditioner specifically includes:

[0041] When the air conditioner is in cooling mode, a corresponding cooling energy efficiency calculation model is matched.

[0042] The cooling energy efficiency calculation model is EER=E*(α1+α2*(TX+TP)+α3*(TX) 2 +TP 2 +TX*TP)+α4*(TX 3 +TP 3 +TX 2 *TP+TP 2 *TX);

[0043] Where EER is the operating energy efficiency under refrigeration conditions, E is the refrigeration energy efficiency correction fitting parameter, α1, α2, α3 and α4 are the model fitting parameters, TX is the intake temperature, and TP is the exhaust temperature.

[0044] Preferably, the step of matching the pre-built energy efficiency calculation model according to the operating conditions of the air conditioner specifically includes:

[0045] When the air conditioner is in heating mode, a corresponding heating energy efficiency calculation model is matched.

[0046] The heating efficiency calculation model is COP=C*(α5+α6*(TX+TP)+α7*(TX) 2 +TP 2 +TX*TP)+α8*(TX 3 +TP 3 +TX 2 *TP+TP 2 *TX);

[0047] Where COP is the operating energy efficiency under heating conditions, C is the heating energy efficiency correction fitting parameter, α5, α6, α7 and α8 are the model fitting parameters, TX is the intake temperature, and TP is the exhaust temperature.

[0048] Compared with existing technologies, the air conditioner and its capacity calculation method disclosed in this invention include: a refrigeration circuit in which refrigerant circulates sequentially through a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, wherein one of the outdoor and indoor heat exchangers serves as a condenser and the other as an evaporator; a temperature detection device for detecting the suction and exhaust temperatures of the indoor heat exchanger; a controller; matching a pre-built energy efficiency calculation model according to the operating conditions of the air conditioner; calculating the operating energy efficiency based on the energy efficiency calculation model and the suction and exhaust temperatures of the air conditioner during operation; obtaining the operating power of the air conditioner; and calculating the air conditioner's capacity value based on the operating power and the operating energy efficiency. This application offers higher detection accuracy and reduces the computational power and memory requirements of the air conditioner. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of an air conditioner according to one embodiment of the present invention;

[0050] Figure 2 This is a partial structural diagram of the refrigeration circuit of the air conditioner in an embodiment of the present invention;

[0051] Figure 3 This is another structural schematic diagram of the air conditioner provided in an embodiment of the present invention;

[0052] Figure 4 This is a schematic diagram illustrating the connection relationship between an air conditioner and other devices according to an embodiment of the present invention;

[0053] Figure 5 This is a flowchart illustrating the steps performed by the air conditioner provided in this embodiment of the invention;

[0054] Figure 6 This is a schematic diagram of the process for constructing an energy efficiency calculation model for an air conditioner under cooling conditions, provided in an embodiment of the present invention.

[0055] Figure 7 This is a schematic diagram of the process for constructing an energy efficiency calculation model for an air conditioner under heating conditions, provided in an embodiment of the present invention.

[0056] Figure 8 This is another flowchart illustrating the steps performed by the air conditioner provided in this embodiment of the invention;

[0057] Figure 9 This is another flowchart illustrating the steps performed by the air conditioner provided in this embodiment of the invention;

[0058] Figure 10 This is a flowchart illustrating the air conditioner capacity calculation method provided in an embodiment of the present invention. Detailed Implementation

[0059] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0063] See Figure 1 This is a schematic diagram of the structure of an air conditioner according to one embodiment of the present invention. The present invention provides an air conditioner 100, including an indoor unit 110 and an outdoor unit 120. The indoor unit 110 is typically installed indoors and can be in the form of a wall-mounted unit, a floor-standing unit, etc. The outdoor unit 120 is typically installed outdoors and is used for heat exchange with the indoor environment. The air conditioner 100 has a refrigeration circuit 130. By circulating the refrigerant in the refrigeration circuit 130, a vapor compression refrigeration cycle can be performed. Connecting pipes connect the indoor unit 110 and the outdoor unit 120 to form a refrigeration circuit for refrigerant circulation.

[0064] See Figure 2This is a partial structural diagram of the refrigeration circuit of an air conditioner in an embodiment of the present invention. In this application, the air conditioner executes a refrigeration cycle using a compressor 131, an indoor heat exchanger 132, an expansion valve 133, and an outdoor heat exchanger 134. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, supplying refrigerant to the conditioned and heat-exchanged air. The indoor heat exchanger 132 is typically located in the indoor unit 110, while the compressor 131 and outdoor heat exchanger 134 are typically located in the outdoor unit 120. The expansion valve 133 can be located in either the indoor unit 110 or the outdoor unit 120. The indoor heat exchanger 132 and outdoor heat exchanger 134 function as condensers or evaporators. When the indoor heat exchanger 132 functions as a condenser, the air conditioner acts as a heater in heating mode; when the indoor heat exchanger 132 functions as an evaporator, the air conditioner acts as a cooler in cooling mode.

[0065] Compressor 131 compresses refrigerant gas at high temperature and pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. Expansion valve 133 causes the high-temperature, high-pressure liquid refrigerant condensed in the condenser to expand into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant that has expanded in expansion valve 133 and returns the low-temperature, low-pressure refrigerant gas to compressor 131. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0066] The air conditioner provided in this embodiment of the invention includes:

[0067] The refrigeration circuit circulates the refrigerant sequentially through the compressor, outdoor heat exchanger, expansion valve, and indoor heat exchanger. One of the outdoor heat exchanger and the indoor heat exchanger serves as a condenser, and the other serves as an evaporator.

[0068] A temperature detection device is used to detect the intake temperature and exhaust temperature of the indoor heat exchanger;

[0069] Controller;

[0070] For specific implementation, see Figure 3 This is another structural schematic diagram of an air conditioner provided in an embodiment of the present invention. The air conditioner includes a compressor 131, an indoor heat exchanger 132, an outdoor heat exchanger 134, an expansion valve 133, and a temperature detection device 136.

[0071] The discharge port of compressor 131 is connected to the refrigerant inlet of indoor heat exchanger 132 via a pipeline. The refrigerant outlet of indoor heat exchanger 132 is connected to the refrigerant inlet of expansion valve 133 via a pipeline. The refrigerant outlet of expansion valve 133 is connected to the refrigerant inlet of outdoor heat exchanger 134 via a pipeline. The refrigerant outlet of outdoor heat exchanger 134 is connected to the suction port of compressor 131 via a pipeline. The refrigerant circulates sequentially through the compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger to form a refrigeration circuit. In the refrigeration circuit, one of the outdoor heat exchanger and the indoor heat exchanger acts as a condenser, and the other acts as an evaporator.

[0072] In this application, the air conditioner also includes a temperature detection device 136, which is installed on the indoor unit of the air conditioner and is used to detect the pipe temperatures at the inlet and outlet of the indoor heat exchanger, i.e., the intake temperature and exhaust temperature of the indoor heat exchanger.

[0073] It should be noted that installing temperature sensors on the inlet and outlet pipes of the indoor heat exchanger is a standard accessory in existing air conditioners with capacity calculation functions. Conventional air conditioners generally have this temperature sensor. By adding temperature and pressure detection devices at the inlet and outlet of the indoor unit's evaporator, the enthalpy at the evaporator inlet and outlet is calculated, and the air conditioner's capacity is calculated using the enthalpy difference method. Alternatively, the enthalpy values ​​of the air at the air inlet and outlet of the air conditioner can be detected, and the calculation can be performed using the air enthalpy difference method.

[0074] Existing computational methods all involve calculating fluid enthalpy. Determining enthalpy from temperature and pressure requires extensive fitting calculations or embedding of physical property tables, placing high demands on the machine's computing power and memory. Furthermore, enthalpy calculation methods are significantly affected by the environment, requiring high precision and accurate installation of the detection equipment. They are also susceptible to lower accuracy due to poor installation of the temperature detection device.

[0075] The controller configured in the air conditioner is used to control the operation of the air conditioner and to calculate the air conditioner's capacity. See [link / reference]. Figure 4 This is a schematic diagram illustrating the connection relationship between an air conditioner and other devices according to an embodiment of the present invention.

[0076] The controller 142 is connected to the refrigeration circuit 130 and the temperature detection device 136 respectively.

[0077] It should be noted that the temperature detection device 136 includes an inlet temperature sensor 137 and an outlet temperature sensor 138.

[0078] An air inlet temperature sensor 137 is installed at the air inlet of the indoor heat exchanger to detect the intake temperature of the air at the air inlet of the indoor heat exchanger.

[0079] An outlet temperature sensor 138 is installed at the outlet of the indoor heat exchanger to detect the exhaust temperature of the outlet of the indoor heat exchanger.

[0080] The controller needs to obtain the operating parameters of the refrigeration circuit, determine the operating frequency parameters of the air conditioner, and complete the capacity calculation of the air conditioner.

[0081] In this embodiment of the invention, the controller 142 can respond to a preset instruction and perform a capacity calculation operation for the air conditioner, specifically including the following steps:

[0082] The pre-built energy efficiency calculation model is matched according to the operating conditions of the air conditioner;

[0083] Based on the energy efficiency calculation model, and combined with the air intake temperature and exhaust temperature of the air conditioner during operation, the operating energy efficiency is calculated.

[0084] Obtain the operating power of the air conditioner, and calculate the air conditioner's capacity value based on the operating power and the operating energy efficiency.

[0085] For specific implementation, see Figure 5 This is a flowchart illustrating the steps performed by the air conditioner according to an embodiment of the present invention. When the controller receives the capacity calculation instruction, it performs the following steps:

[0086] Step S501: Detect the operating condition of the air conditioner.

[0087] Air conditioners have two operating modes: cooling mode and heating mode. The way an air conditioner's capabilities are represented varies depending on the mode it is in.

[0088] Step S502: Match the energy efficiency calculation model.

[0089] The energy efficiency of an air conditioner is correlated with its intake and exhaust temperatures during operation. By pre-constructing, training, and optimizing models, a correlation between the air conditioner's energy efficiency and these temperatures can be established, allowing for the determination of energy efficiency calculation models under different operating conditions. Furthermore, based on the air conditioner's current operating conditions, a corresponding energy consumption calculation model can be developed to calculate the operating energy consumption.

[0090] Step S503: Obtain the suction temperature and discharge temperature. That is, obtain the suction temperature and discharge temperature of the indoor heat exchanger under the current operating conditions of the air conditioner.

[0091] Step S504: Calculate operating energy efficiency. That is, calculate the operating energy efficiency based on the energy efficiency calculation model, intake temperature, and exhaust temperature.

[0092] By detecting the outdoor intake and exhaust temperatures of the air conditioner during operation, and through data fitting, the operating energy efficiency of the air conditioner is calculated.

[0093] Step S505: Obtain the operating frequency.

[0094] The air conditioner's operating power can be obtained directly during machine operation. This data is real-time monitoring data and has a high accuracy rate.

[0095] Step S506: Calculate the air conditioner capacity value, that is, calculate the air conditioner capacity value based on the operating power and the operating energy efficiency.

[0096] To overcome the shortcomings of existing energy efficiency calculation methods, this application proposes a solution that only requires detecting the outdoor intake and exhaust temperatures of the air conditioner during operation. The energy efficiency of the air conditioner is then calculated through data fitting. The power consumption of the air conditioner can currently be directly obtained, and the energy efficiency can be calculated using the energy efficiency formula. This simplifies the calculation, reduces the computational power and memory requirements of the machine, and results in higher calculation accuracy.

[0097] In another embodiment of the present invention, the capacity value of the air conditioner is the product of the operating power and the operating energy efficiency.

[0098] In the specific implementation of this embodiment, according to the energy efficiency calculation formula, the capacity of the air conditioner = the power of the air conditioner × the energy efficiency of the air conditioner.

[0099] In calculating the air conditioner's capacity value, this application uses the product of the operating power and operating energy efficiency calculated under the current operating conditions as the air conditioner's capacity value.

[0100] The operating capacity of the indoor unit is calculated by measuring operating power and energy efficiency, and then fed back to the air conditioner's controller or output to the user. This allows the controller to adjust the air conditioner's operating parameters based on the operating capacity, or the user to regulate the air conditioner based on the operating capacity, thus achieving intelligent control of the air conditioner.

[0101] In another embodiment provided by the present invention, the process of the controller constructing the energy efficiency calculation model specifically includes:

[0102] The air conditioner is configured under different operating conditions, and the operating frequency of the compressor is adjusted accordingly;

[0103] Obtain the compressor's current intake temperature, current discharge temperature, current operating power, and current capacity value under different operating conditions and at different operating frequencies;

[0104] Calculate the current operating energy efficiency at different operating frequencies based on the current capacity value and current operating power.

[0105] The current operating energy efficiency, current intake temperature, and current exhaust temperature under different operating frequencies under different operating conditions are input into a preset energy efficiency fitting model to be trained for fitting. The model fitting parameters for different operating conditions are calculated, and then the energy efficiency calculation model for different operating conditions is obtained.

[0106] In the specific implementation of this embodiment, the air conditioner needs to be matched with different energy efficiency calculation models under different operating conditions. Therefore, when constructing the energy efficiency calculation model, it is necessary to perform fitting training for different operating conditions to obtain the fitting parameters of the model and determine the energy efficiency calculation model under different operating conditions.

[0107] Specifically, see Figure 6 This is a flowchart illustrating the construction of an energy efficiency calculation model for an air conditioner under cooling conditions, provided in an embodiment of the present invention. When constructing the energy efficiency calculation model under cooling conditions, the controller needs to perform the following steps:

[0108] Step S601: Configure the air conditioner to cooling mode.

[0109] Step S602: Run for a preset duration at a preset initial running frequency.

[0110] Step S603: Collect the current intake temperature, current exhaust temperature, current operating power, and current capacity value.

[0111] Step S604: Add the data collected at the current operating frequency to the fitting dataset.

[0112] It should be noted that the current capacity value can be obtained by calculating the capacity value of the current air conditioner system through other existing methods, or by monitoring the capacity value of the air conditioner using existing monitoring software.

[0113] Step S605: Calculate the current operating energy efficiency at the current operating frequency. The current energy efficiency is the product of the current operating power and the current operating energy efficiency; therefore, the current operating energy efficiency can be calculated based on the current operating power and the current energy efficiency value.

[0114] Step S606: Determine whether the amount of data in the fitted dataset is not less than the preset number.

[0115] In other words, whether the amount of data in the training dataset at different operating frequencies meets the data volume requirements for data fitting.

[0116] If not, proceed to step S607;

[0117] If so, proceed to step S608;

[0118] Step S607: Adjust the current operating frequency of the air conditioner, then return to step S603.

[0119] Step S608: Fit the cooling energy efficiency fitting model to be trained according to the current fitting dataset to obtain the model fitting parameters.

[0120] Step S609: Output the cooling energy efficiency calculation model based on the model fitting parameters.

[0121] Specifically, see Figure 7 This is a flowchart illustrating the construction of an energy efficiency calculation model for an air conditioner under heating conditions, provided in an embodiment of the present invention. When constructing the energy efficiency calculation model under heating conditions, the controller needs to perform the following steps:

[0122] Step S701: Configure the air conditioner to heating mode.

[0123] Step S702: Run for a preset duration at a preset initial running frequency.

[0124] Step S703: Collect the current intake temperature, current exhaust temperature, current operating power, and current capacity value.

[0125] Step S704: Add the data collected at the current operating frequency to the fitting dataset.

[0126] It should be noted that the current capacity value can be obtained by calculating the capacity value of the current air conditioner system through other existing methods, or by monitoring the capacity value of the air conditioner using existing monitoring software.

[0127] Step S705: Calculate the current operating energy efficiency at the current operating frequency. The current energy efficiency is the product of the current operating power and the current operating energy efficiency; therefore, the current operating energy efficiency can be calculated based on the current operating power and the current energy efficiency value.

[0128] Step S706: Determine whether the amount of data in the fitted dataset has reached the preset lower limit.

[0129] In other words, whether the amount of data in the training dataset at different operating frequencies meets the data volume requirements for data fitting.

[0130] If not, proceed to step S707;

[0131] If so, proceed to step S708;

[0132] Step S707: Adjust the current operating frequency of the air conditioner, then return to step S703.

[0133] Step S708: Fit the heating energy efficiency fitting model to be trained based on the current fitting dataset to obtain the model fitting parameters.

[0134] Step S709: Output the heating energy efficiency calculation model based on the model fitting parameters.

[0135] To obtain the correction parameters for the energy efficiency calculation model, multiple sets of performance experiments are required. By adjusting the compressor operating frequency, different intake temperature, exhaust temperature, and capacity values ​​are obtained at different compressor operating frequencies. These values ​​are then substituted into the energy efficiency fitting model to be trained for fitting, and the fitting correction parameter values ​​are obtained, thus yielding the energy efficiency calculation model for different operating conditions.

[0136] In yet another embodiment provided by the present invention, the controller is configured as follows:

[0137] When the air conditioner is in cooling mode, a corresponding cooling energy efficiency calculation model is matched.

[0138] The cooling energy efficiency calculation model is EER=E*(α1+α2*(TX+TP)+α3*(TX) 2 +TP 2 +TX*TP)+α4*(TX 3 +TP 3 +TX 2 *TP+TP 2 *TX);

[0139] Where EER is the operating energy efficiency under refrigeration conditions, E is the refrigeration energy efficiency correction fitting parameter, α1, α2, α3 and α4 are the model fitting parameters, TX is the intake temperature, and TP is the exhaust temperature.

[0140] In the specific implementation of this embodiment, please refer to Figure 8 This is another flowchart illustrating the steps performed by the air conditioner according to an embodiment of the present invention. When the controller calculates the air conditioner's capacity, it specifically performs the following steps:

[0141] Step S801: Obtain the current operating status of the air conditioner.

[0142] Step S802: Determine whether the current operating condition is in cooling mode.

[0143] If not, return to step S801;

[0144] If so, proceed to step S803;

[0145] Step S803: Match the cooling energy efficiency calculation model.

[0146] Step S804: Obtain the intake temperature and exhaust temperature;

[0147] Step S805: Calculate the operating energy efficiency according to the refrigeration energy efficiency calculation model, that is, substitute the intake temperature and exhaust temperature into the refrigeration energy efficiency calculation model to obtain the operating energy efficiency output.

[0148] The cooling energy efficiency calculation model is EER=E*(α1+α2*(TX+TP)+α3*(TX)2 +TP 2 +TX*TP)+α4*(TX 3 +TP 3 +TX 2 *TP+TP 2 *TX).

[0149] Where EER is the operating energy efficiency under refrigeration conditions, in watts. TX is the suction temperature, and TP is the discharge temperature, both in degrees Celsius. α1, α2, α3, and α4 are model fitting parameters, and E is the refrigeration energy efficiency correction fitting parameter, which needs to be obtained through fitting training.

[0150] Step S806: Obtain operating power.

[0151] Step S807: Calculate the air conditioner's capacity value. This involves multiplying the operating power and operating energy efficiency as the air conditioner's capacity value.

[0152] Under cooling conditions, the air conditioner's capacity value Qc = EER * P.

[0153] Where Qc is the air conditioner's capacity value under cooling conditions, and P is the operating power under cooling conditions.

[0154] By acquiring the air conditioner's operating power, suction temperature, and exhaust temperature under cooling conditions, the air conditioner's capacity value can be calculated in real time. The calculation method for the air conditioner's capacity value provided in this application has high accuracy and strong real-time performance.

[0155] In yet another embodiment provided by the present invention, the controller is configured as follows:

[0156] When the air conditioner is in heating mode, a corresponding heating energy efficiency calculation model is matched.

[0157] The heating efficiency calculation model is COP=C*(α5+α6*(TX+TP)+α7*(TX) 2 +TP 2 +TX*TP)+α8*(TX 3 +TP 3 +TX 2 *TP+TP 2 *TX);

[0158] Wherein, COP is the operating energy efficiency under heating conditions, C is the heating energy efficiency correction fitting parameter, α5, α6, α7 and α8 are the model fitting parameters, TX is the intake temperature, and TP is the exhaust temperature.

[0159] In the specific implementation of this embodiment, please refer to Figure 9This is another flowchart illustrating the steps performed by the air conditioner according to an embodiment of the present invention. When the controller calculates the air conditioner's capacity, it specifically performs the following steps:

[0160] Step S901: Obtain the current operating status of the air conditioner.

[0161] Step S902: Determine whether the current operating condition is in heating mode.

[0162] If not, return to step S901;

[0163] If so, proceed to step S903;

[0164] Step S903: Match the heating energy efficiency calculation model.

[0165] Step S904: Obtain the intake temperature and exhaust temperature;

[0166] Step S905: Calculate the operating energy efficiency according to the heating energy efficiency calculation model, that is, substitute the intake temperature and exhaust temperature into the heating energy efficiency calculation model to obtain the operating energy efficiency output.

[0167] The heating efficiency calculation model is COP=C*(α5+α6*(TX+TP)+α7*(TX) 2 +TP 2 +TX*TP)+α8*(TX 3 +TP 3 +TX 2 *TP+TP 2 *TX).

[0168] Where COP is the operating energy efficiency under heating conditions, in watts. TX is the intake temperature, and TP is the exhaust temperature, both in degrees Celsius. α5, α6, α7, and α8 are model fitting parameters, and C is the heating energy efficiency correction fitting parameter, which needs to be obtained through fitting training.

[0169] Step S906: Obtain operating power.

[0170] Step S907: Calculate the air conditioner's capacity value. This involves multiplying the operating power and operating energy efficiency as the air conditioner's capacity value.

[0171] In cooling mode, the air conditioner's capacity value Qh = C * P.

[0172] Where Qh is the air conditioner's capacity value under cooling conditions, and P is the operating power under cooling conditions.

[0173] By acquiring the operating power, intake temperature, and exhaust temperature of the air conditioner under heating conditions, the capacity value of the air conditioner can be calculated in real time. The calculation method for the capacity value of the air conditioner provided in this application has high accuracy and strong real-time performance.

[0174] This invention also provides a method for calculating the capacity of an air conditioner, applied in an air conditioner, the air conditioner comprising:

[0175] The refrigeration circuit circulates the refrigerant sequentially through the compressor, outdoor heat exchanger, expansion valve, and indoor heat exchanger. One of the outdoor heat exchanger and the indoor heat exchanger serves as a condenser, and the other serves as an evaporator.

[0176] A temperature sensor is used to detect the coil temperature of the indoor heat exchanger;

[0177] See Figure 10 This is a flowchart illustrating the air conditioner capacity calculation method provided in an embodiment of the present invention. The method includes the following steps:

[0178] Step S1: Match the pre-built energy efficiency calculation model according to the operating conditions of the air conditioner;

[0179] Step S2: Calculate the operating energy efficiency based on the energy efficiency calculation model and the air intake and exhaust temperatures of the air conditioner during operation.

[0180] Step S3: Obtain the operating power of the air conditioner, and calculate the air conditioner's capacity value based on the operating power and the operating energy efficiency.

[0181] The air conditioner capacity calculation method provided in this application includes the following steps in its implementation:

[0182] Detect the operating status of the air conditioner. The air conditioner's operating modes include cooling mode and heating mode. The corresponding way to characterize the air conditioner's capacity differs depending on the mode it is in.

[0183] Matching the energy efficiency calculation model. The energy efficiency of an air conditioner has a fitting relationship with the intake and exhaust temperatures during operation. By pre-building, training, and optimizing the model, a fitting relationship between the air conditioner's energy efficiency and the intake and exhaust temperatures can be established, determining the energy efficiency calculation model for the air conditioner under different operating conditions. Then, based on the current operating conditions of the air conditioner, a corresponding energy consumption calculation model is matched to calculate the operating energy consumption.

[0184] Obtain the suction and discharge temperatures. That is, obtain the suction and discharge temperatures of the indoor heat exchanger under the current operating conditions of the air conditioner.

[0185] Calculate operating energy efficiency. This involves calculating the operating energy efficiency based on the energy efficiency calculation model, intake temperature, and exhaust temperature. The operating energy efficiency is calculated by detecting the outdoor intake and exhaust temperatures during air conditioner operation and through data fitting.

[0186] Obtain the operating frequency. The air conditioner's operating power can be directly obtained during machine operation. This data is real-time monitoring data and has high accuracy.

[0187] Calculate the air conditioner's capacity value, that is, calculate the air conditioner's capacity value based on the operating power and the operating energy efficiency.

[0188] To overcome the shortcomings of existing energy efficiency calculation methods, this application proposes a solution that only requires detecting the outdoor intake and exhaust temperatures of the air conditioner during operation. The energy efficiency of the air conditioner is then calculated through data fitting. The power consumption of the air conditioner can currently be directly obtained, and the energy efficiency can be calculated using the energy efficiency formula. This simplifies the calculation, reduces the computational power and memory requirements of the machine, and results in higher calculation accuracy.

[0189] It should be noted that the capacity calculation method for an air conditioner provided in this embodiment of the invention has the same process steps as the controller of an air conditioner in the above embodiment. The working principles and beneficial effects of the two are one-to-one, so they will not be described again.

[0190] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0191] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An air conditioner, characterized in that, include: The refrigeration circuit circulates the refrigerant sequentially through the compressor, outdoor heat exchanger, expansion valve, and indoor heat exchanger. One of the outdoor heat exchanger and the indoor heat exchanger serves as a condenser, and the other serves as an evaporator. A temperature detection device is used to detect the intake temperature and exhaust temperature of the indoor heat exchanger; The controller is configured as follows: The pre-built energy efficiency calculation model is matched according to the operating conditions of the air conditioner; Based on the energy efficiency calculation model, and combined with the air intake temperature and exhaust temperature of the air conditioner during operation, the operating energy efficiency is calculated. Obtain the operating power of the air conditioner, and calculate the air conditioner's capacity value based on the operating power and the operating energy efficiency. When the air conditioner is in cooling mode, a corresponding cooling energy efficiency calculation model is matched. The cooling energy efficiency calculation model is as follows: ; in, For energy efficiency in cooling operation, E To correct the fitting parameters for cooling energy efficiency, , , and For model fitting parameters, Intake temperature, This refers to the exhaust temperature. When the air conditioner is in heating mode, a corresponding heating energy efficiency calculation model is matched. The heating energy efficiency calculation model is as follows: ; in, C represents the operating energy efficiency under heating conditions, and C is the heating energy efficiency correction fitting parameter. , , and For model fitting parameters, Intake temperature, This refers to the exhaust temperature.

2. The air conditioner as described in claim 1, characterized in that, The capacity value of the air conditioner is the product of the operating power and the operating energy efficiency.

3. The air conditioner as described in claim 1, characterized in that, The process of the controller constructing the energy efficiency calculation model specifically includes: The air conditioner is configured under different operating conditions, and the operating frequency of the compressor is adjusted accordingly; Obtain the compressor's current intake temperature, current discharge temperature, current operating power, and current capacity value under different operating conditions and at different operating frequencies; Calculate the current operating energy efficiency at different operating frequencies based on the current capacity value and current operating power. The current operating energy efficiency, current intake temperature, and current exhaust temperature under different operating frequencies under different operating conditions are input into a preset energy efficiency fitting model to be trained for fitting. The model fitting parameters for different operating conditions are calculated, and then the energy efficiency calculation model for different operating conditions is obtained.

4. A method for calculating the capacity of an air conditioner, characterized in that, The air conditioner includes: The refrigeration circuit circulates the refrigerant sequentially through the compressor, outdoor heat exchanger, expansion valve, and indoor heat exchanger. One of the outdoor heat exchanger and the indoor heat exchanger serves as a condenser, and the other serves as an evaporator. A temperature detection device is used to detect the intake temperature and exhaust temperature of the indoor heat exchanger; Controller; The method includes: The pre-built energy efficiency calculation model is matched according to the operating conditions of the air conditioner; Based on the energy efficiency calculation model, and combined with the air intake temperature and exhaust temperature of the air conditioner during operation, the operating energy efficiency is calculated. Obtain the operating power of the air conditioner, and calculate the air conditioner's capacity value based on the operating power and the operating energy efficiency. Specifically, the step of matching a pre-built energy efficiency calculation model according to the operating conditions of the air conditioner includes: When the air conditioner is in cooling mode, a corresponding cooling energy efficiency calculation model is matched. The cooling energy efficiency calculation model is as follows: ; in, For energy efficiency in cooling operation, E To correct the fitting parameters for cooling energy efficiency, , , and For model fitting parameters, Intake temperature, This refers to the exhaust temperature. When the air conditioner is in heating mode, a corresponding heating energy efficiency calculation model is matched. The heating energy efficiency calculation model is as follows: ; in, C represents the operating energy efficiency under heating conditions, and C is the heating energy efficiency correction fitting parameter. , , and For model fitting parameters, Intake temperature, This refers to the exhaust temperature.

5. The air conditioner capacity calculation method as described in claim 4, characterized in that, The capacity value of the air conditioner is the product of the operating power and the operating energy efficiency.

6. The air conditioner capacity calculation method as described in claim 4, characterized in that, The process of the controller constructing the energy efficiency calculation model specifically includes: The air conditioner is configured under different operating conditions, and the operating frequency of the compressor is adjusted accordingly; Obtain the compressor's current intake temperature, current discharge temperature, current operating power, and current capacity value under different operating conditions and at different operating frequencies; Calculate the current operating energy efficiency at different operating frequencies based on the current capacity value and current operating power. The current operating energy efficiency, current intake temperature, and current exhaust temperature under different operating frequencies under different operating conditions are input into a preset energy efficiency fitting model to be trained for fitting. The model fitting parameters for different operating conditions are calculated, and then the energy efficiency calculation model for different operating conditions is obtained.

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