Air conditioner

Abstract

The application provides an air conditioner, which comprises a compressor, an indoor fan, an exhaust temperature sensor, a suction temperature sensor, an indoor coil temperature sensor, an indoor air environment sensor and a controller, wherein the controller is configured to: acquire a target operating frequency of the compressor, a target suction temperature, a target exhaust temperature and a rotating speed of the indoor fan in a current operating mode; determine a target indoor coil temperature and a target indoor environment temperature according to the parameters; determine a heat transfer coefficient of the air conditioner according to the rotating speed, the target operating frequency and the target indoor environment temperature; and determine a refrigerating capacity or a heating capacity of the air conditioner in the current operating mode according to the heat transfer coefficient, the target indoor environment temperature and the target indoor coil temperature. The application calculates the real-time capacity of the air conditioner according to the operating state parameters and the indoor and outdoor environment parameters of the air conditioner, so that the capacity calculation of the air conditioner is more convenient and accurate, and no additional device is needed, thereby reducing the occupied space of the air conditioner and the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an air conditioner. BACKGROUND

[0002] With the development of economy, the requirements of users for air conditioners are also higher and higher. For users with low requirements, they may only focus on whether the air conditioning system can cool or heat, whether the outlet temperature meets the requirements, and whether the reliable performance meets the requirements. For users with high requirements, they may increase the current air conditioning system cooling capacity on the basis of the above requirements, and determine whether it is consistent with the nominal parameters on the product nameplate.

[0003] At present, the air conditioner can increase temperature detection devices and pressure detection devices at the inlet and outlet of the indoor motor evaporator, detect the air enthalpy and air volume of the evaporator inlet and outlet, and calculate the air conditioner capacity. Or detect the exhaust temperature, suction temperature, and air supplement temperature of the air conditioner to determine the exhaust enthalpy, suction enthalpy, and lubricating oil enthalpy, and calculate the air conditioner capacity by the enthalpy difference method and correction.

[0004] However, the above method needs to increase additional devices in the air conditioner, occupy the internal space of the air conditioner, and the device structure is complex, which leads to high cost of the air conditioner, and the accuracy of determining the enthalpy value by temperature value is not high, which affects the accuracy of the air conditioner capacity. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art.

[0006] To this end, one object of the present application is to provide an air conditioner which calculates the real-time capacity of the air conditioner according to the operating state parameters of the air conditioner and the indoor and outdoor environment parameters, so that the capacity calculation of the air conditioner is more convenient and accurate, and no additional devices are needed, reducing the occupied space of the air conditioner and reducing the cost.

[0007] In order to achieve the above object, the embodiment of the first aspect of the present application proposes an air conditioner, comprising: a compressor for performing the work of compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging to a condenser; an indoor fan for driving indoor air to be sent out from an air outlet after heat exchange with an indoor heat exchanger; an exhaust temperature sensor for detecting the exhaust temperature of the compressor; a suction temperature sensor for detecting the suction temperature of the compressor; an indoor coil temperature sensor for detecting the indoor coil temperature; an indoor air environment sensor for detecting the indoor environment temperature; and a controller configured to: obtain the target operating frequency, the target suction temperature, the target exhaust temperature of the compressor and the rotating speed of the indoor fan in the current operating mode; determine the target indoor coil temperature and the target indoor environment temperature according to the target suction temperature and the target exhaust temperature; determine the heat transfer coefficient of the air conditioner according to the rotating speed, the target operating frequency and the target indoor environment temperature; and determine the refrigerating capacity or the heating capacity of the air conditioner in the current operating mode according to the heat transfer coefficient, the target indoor environment temperature and the target indoor coil temperature.

[0008] According to the air conditioner of the embodiment of the present application, by obtaining the target operating frequency, the target suction temperature, the target exhaust temperature of the compressor and the rotating speed of the indoor fan in the current operating mode, and calculating the heat transfer coefficient in different operating modes, the corresponding real-time capacity is calculated according to the heat transfer coefficient in different operating modes, that is, the refrigerating capacity and the heating capacity of the air conditioner are calculated in real time, by calculating the real-time capacity of the air conditioner according to the operating state parameters and the indoor and outdoor environment parameters of the air conditioner, the capacity of the air conditioner is calculated without calculating the capacity of the air conditioner according to the enthalpy difference method, so that the capacity calculation of the air conditioner is more convenient and accurate, and the hardware cost is reduced without increasing additional devices to detect the capacity of the air conditioner, thereby reducing the hardware cost while reducing the hardware occupation space of the air conditioner.

[0009] In some embodiments, when obtaining the target operating frequency of the compressor, the controller is configured to: obtain a first operating frequency and a second operating frequency of the compressor; calculate an absolute value of a frequency difference of the first operating frequency and the second operating frequency; when the absolute value of the frequency difference does not exceed a first preset frequency deviation, bring the first operating frequency, the second operating frequency, and a preset first frequency compensation coefficient into a first target frequency calculation formula to obtain a first target operating frequency, and take the first target operating frequency as the target operating frequency; when the absolute value of the frequency difference is between the first preset frequency deviation and a second preset frequency deviation, bring the first operating frequency, the second operating frequency, an operating frequency change time, a preset second frequency compensation coefficient, and a preset third frequency compensation coefficient into a second target frequency calculation formula to obtain a second target operating frequency, and take the second target operating frequency as the target operating frequency; and when the absolute value of the frequency difference exceeds the second preset frequency deviation, bring the first operating frequency, the second operating frequency, the operating frequency change time, a preset fourth frequency compensation coefficient, a preset fifth frequency compensation coefficient, and a preset sixth frequency compensation coefficient into a third target frequency calculation formula to obtain a third target operating frequency, and take the third target operating frequency as the target operating frequency.

[0010] In some embodiments, the first target frequency calculation formula comprises: wherein the Fre c1 is the first target operating frequency, the Fre is the first operating frequency, the Fre1 is the second operating frequency, and the A1 is the preset first frequency compensation coefficient; the second target frequency calculation formula comprises: wherein the Fre c2 is the second target operating frequency, the Fre is the first operating frequency, the Fre1 is the second operating frequency, the A2 is the preset second frequency compensation coefficient, the B2 is the preset third frequency compensation coefficient, and t1 is an operating frequency change time; and the third target frequency calculation formula comprises: wherein the Fre c3 is the third target operating frequency, the Fre is the first operating frequency, the Fre1 is the second operating frequency, the A3 is the preset fourth frequency compensation coefficient, the B3 is the preset fifth frequency compensation coefficient, and the C3 is the preset sixth frequency compensation coefficient.

[0011] In some embodiments, when determining the target indoor coil temperature according to the target suction temperature and the target discharge temperature, the controller is configured to: obtain a first indoor coil temperature and a second indoor coil temperature; input the first indoor coil temperature, the second indoor coil temperature, and a preset first coil temperature compensation coefficient into a first target indoor coil temperature calculation formula to obtain a first target indoor coil temperature, and take the first target indoor coil temperature as the target indoor coil temperature; input the first indoor coil temperature, the second indoor coil temperature, the target suction temperature, a preset second coil temperature compensation coefficient, a preset third coil temperature compensation coefficient into a second target indoor coil temperature calculation formula to obtain a second target indoor coil temperature, and take the second target indoor coil temperature as the target indoor coil temperature; input the first indoor coil temperature, the second indoor coil temperature, the target discharge temperature, a preset fourth coil temperature compensation coefficient, a preset fifth coil temperature compensation coefficient into a third target indoor coil temperature calculation formula to obtain a third target indoor coil temperature, and take the third target indoor coil temperature as the target indoor coil temperature.

[0012] In some embodiments, the first target indoor coil temperature calculation formula comprises: wherein the T incoil_c_1 is the first target indoor coil temperature, the T incoil is the first indoor coil temperature, the T incoil_1 is the second indoor coil temperature, is a preset first coil temperature compensation coefficient; the second target indoor coil temperature calculation formula comprises: wherein the T incoil_c_2 is the second target indoor coil temperature, the T incoil is the first indoor coil temperature, the T incoil_1 is the second indoor coil temperature, is a preset second coil temperature compensation coefficient, the B Tincoil_2 is a preset third coil temperature compensation coefficient, the T s_c is the target suction temperature; the third target indoor coil temperature calculation formula comprises: wherein the T incoil_c_3 is the third target indoor coil temperature, the T incoil is the first indoor coil temperature, the T incoil_1 is the second indoor coil temperature, the T d_c is the target discharge temperature, is a preset fourth coil temperature compensation coefficient, is a preset fifth coil temperature compensation coefficient.

[0013] In some embodiments, when the target indoor environment temperature is determined according to the target suction temperature and the target exhaust temperature, the controller is configured to: obtain a first indoor environment temperature and a second indoor environment temperature; bring the first indoor environment temperature, the second indoor environment temperature, and a preset first indoor temperature compensation coefficient into a first target indoor environment temperature calculation formula to obtain a first target indoor environment temperature, and take the first target indoor environment temperature as the target indoor environment temperature; bring the first indoor environment temperature, the second indoor environment temperature, the first indoor coil temperature, a preset second air temperature compensation coefficient, a preset third air temperature compensation coefficient, and a preset sixth coil temperature compensation coefficient into a second target indoor environment temperature calculation formula to obtain a second target indoor environment temperature, and take the second target indoor environment temperature as the target indoor environment temperature; and bring the first indoor environment temperature, the second indoor environment temperature, the target exhaust temperature, a preset fourth air temperature compensation coefficient, a preset fifth air temperature compensation coefficient, and a preset exhaust temperature compensation coefficient into a third target indoor environment temperature calculation formula to obtain a third target indoor environment temperature, and take the third target indoor environment temperature as the target indoor environment temperature.

[0014] In some embodiments, the first target indoor environment temperature calculation formula comprises: wherein T air_c_1 is the first target indoor environment temperature, T air is the first indoor environment temperature, T air_r is the second indoor environment temperature, is a preset first indoor temperature compensation coefficient; the second target indoor environment temperature calculation formula comprises: wherein T air_c_2 is the second target indoor environment temperature, T air is the first indoor environment temperature, T air_1 is the second indoor environment temperature, T incoil is the first indoor coil temperature, is a preset second air temperature compensation coefficient, is a preset third air temperature compensation coefficient, and c2 is a preset sixth coil temperature compensation coefficient; and the third target indoor environment temperature calculation formula comprises: wherein T air_c_3 is the third target indoor environment temperature, T air is the first indoor environment temperature, T air_1 is the second indoor environment temperature, is the target exhaust temperature, is a preset fourth air temperature compensation coefficient, c3 is the preset fifth air temperature compensation coefficient, and c3 is the preset exhaust temperature compensation coefficient.

[0015] In some embodiments, when determining the heat transfer coefficient of the air conditioner based on the rotation speed, the target operating frequency, and the target indoor ambient temperature, the controller is configured to: when the air conditioner is in cooling mode or dehumidification mode, substitute the rotation speed, the target operating frequency, the first target indoor ambient temperature, and the second target indoor ambient temperature into a first heat transfer coefficient calculation formula to obtain the cooling mode heat transfer coefficient; when the air conditioner is in heating mode, substitute the rotation speed, the target operating frequency, the first target indoor ambient temperature, and the third target indoor ambient temperature into a second heat transfer coefficient calculation formula to obtain the heating mode heat transfer coefficient.

[0016] In some embodiments, the formula for calculating the first heat transfer coefficient includes: K cold =A K_1 *V a_1 +B K_1 *(T air_c_1 +C K_1 *T air_c_2 )+D K_1 *(Fre c ) b_2 , where K cold V is the heat transfer coefficient in cooling mode. a_1 For rotational speed, Fre c For the target operating frequency, T air_c_1 The primary target indoor ambient temperature, T air_c_2 For the second target indoor ambient temperature, A K_1 To preset the first speed compensation coefficient, B K_1 To preset the first target ambient temperature compensation coefficient, C K_1 Preset second target ambient temperature compensation coefficient, D K_1 The first frequency compensation coefficient is preset; the second heat transfer coefficient calculation formula includes: K heat =A K_2 *V a_2 +B K_2 *(T air_c_1 +C K_2 *T air_c_3 )+D K_2 *(Fre c ) b-2 , where K heat V is the heat transfer coefficient in heating mode. a_2 For rotational speed, Fre c For the target operating frequency, T air_c_1 The primary target indoor ambient temperature, T air_c_3 For the third target indoor ambient temperature, AK_2 B is a preset second rotation speed compensation coefficient K_2 C is a preset third target environment temperature compensation coefficient K_2 D is a preset fourth target environment temperature compensation coefficient K_2 B is a preset second rotation speed compensation coefficient.

[0017] In some embodiments, when the cooling capacity or the heating capacity of the air conditioner in the current operation mode is determined according to the heat transfer coefficient, the target indoor environment temperature, and the target indoor coil temperature, the controller is configured to: bring the cooling mode heat transfer coefficient, the first target indoor environment temperature, the second target indoor environment temperature, the first target indoor coil temperature, the second target indoor coil temperature, the preset cooling capacity compensation coefficient, and the preset heat exchange area into a cooling capacity calculation formula to determine the cooling capacity of the air conditioner; and bring the heating mode heat transfer coefficient, the first target indoor environment temperature, the third target indoor environment temperature, the first target indoor coil temperature, the third target indoor coil temperature, the preset heating capacity compensation coefficient, and the preset heat exchange area into a heating capacity calculation formula to determine the heating capacity of the air conditioner.

[0018] In some embodiments, the cooling capacity calculation formula includes:

[0019] Q cold = a cold *K cold *(T air_c_1 -T incoil_c_1 )*A+K cold *(T air_c_2 -T incoil_c_2 )*A+C Q_cold

[0020] wherein Q cold is the cooling capacity, a cold is a preset first heat transfer compensation coefficient, K cold is the cooling mode heat transfer coefficient, T air_c_1 is the first target indoor environment temperature, T air_c_2 is the second target indoor environment temperature, T incoil_c_1 is the first target indoor coil temperature, T incoil_c_2 is the second target indoor coil temperature, A is a preset heat exchange area, and C Q_cold is a preset cooling capacity compensation coefficient; and the heating capacity calculation formula includes:

[0021] Q heat = a heat *K heat *(T ncoil_c_1 -T air_c_1 )+K heat *(T incoil_c_3 -Tair_c_3 )*A+C Q_heat

[0022] wherein, Q heat is the heating capacity, the a heat is a preset second heat transfer compensation coefficient, K heat is the heat transfer coefficient in heating mode, T air_c_1 is the first target indoor environment temperature, T air_c_3 is the third target indoor environment temperature, T incoil_c_1 is the first target indoor coil temperature, T incoil_c_3 is the third target indoor coil temperature, A is a preset heat exchange area, C Q_heat is a preset heating capacity compensation coefficient.

[0023] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The foregoing and / or additional aspects and advantages of the application will become apparent and be more readily understood through consideration of the following description, taken in conjunction with the accompanying drawings, in which:

[0025] Figure 1 is a structural schematic diagram of an air conditioner according to an embodiment of the application;

[0026] Figure 2 is a flowchart of an air conditioner obtaining a target operating frequency of a compressor according to an embodiment of the application;

[0027] Figure 3 is a flowchart of an air conditioner determining a target indoor coil temperature according to an embodiment of the application;

[0028] Figure 4 is a flowchart of an air conditioner determining a target indoor environment temperature according to an embodiment of the application;

[0029] Figure 5 is a flowchart of an air conditioner determining a heat transfer coefficient according to an embodiment of the application;

[0030] Figure 6 is a flowchart of a capability calculation method of an air conditioner according to an embodiment of the application.

[0031] Reference signs: air conditioner 1;

[0032] Compressor 11; indoor fan 12; discharge temperature sensor 13; suction temperature sensor 14; indoor coil temperature sensor 15; indoor air environment sensor 16; controller 17. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below with reference to the attached drawings, which are exemplary embodiments of the present application. Embodiments of the present application are described in detail below.

[0034] The air conditioner in the present application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to air that has been adjusted and heat-exchanged.

[0035] The compressor compresses refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0036] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-temperature and low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by heat-exchanging with a material to be cooled using latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of an indoor space.

[0037] The outdoor unit of the air conditioner refers to a portion of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0038] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0039] The following will be described with reference to Figures 1-6 An air conditioner 1 according to an embodiment of the present application is described.

[0040] As Figure 1 shown, the air conditioner 1 according to an embodiment of the present application includes a compressor 11, an indoor fan 12, a discharge temperature sensor 13, a suction temperature sensor 14, an indoor coil temperature sensor 15, an indoor air environment sensor 16, and a controller 17, wherein,

[0041] The compressor 11 is configured to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharge the refrigerant gas to a condenser; the indoor fan 12 is configured to drive indoor air to exchange heat with an indoor heat exchanger and then send the indoor air out of an air outlet; the discharge temperature sensor 13 is configured to detect a discharge temperature of the compressor 11; the suction temperature sensor 14 is configured to detect a suction temperature of the compressor 11; the indoor coil temperature sensor 15 is configured to detect an indoor coil temperature; the indoor air environment sensor 16 is configured to detect an indoor air environment temperature; and the controller 17 is configured to: obtain a target operating frequency, a target suction temperature, a target discharge temperature of the compressor 11, and a target rotating speed of the indoor fan 12 in a current operating mode of the air conditioner 1; determine a target indoor coil temperature and a target indoor air environment temperature according to the target suction temperature and the target discharge temperature; determine a heat transfer coefficient of the air conditioner 1 according to the rotating speed, the target operating frequency, and the target indoor air environment temperature; and determine a refrigerating capacity or a heating capacity of the air conditioner 1 in the current operating mode according to the heat transfer coefficient, the target indoor air environment temperature, and the target indoor coil temperature.

[0042] In an embodiment, after the air conditioner 1 is started, the controller 17 obtains, in real time, a rotating speed of the indoor fan 12 in the current operating mode of the air conditioner 1, for example, denoted as V a_2 ; obtains, in real time, a suction temperature of the compressor 11 in the current operating mode of the air conditioner 1 according to the suction temperature sensor 14, for example, denoted as T s , and a suction temperature t1 seconds ago, for example, denoted as T s1 , to determine a target suction temperature, for example, denoted as T s , according to the suction temperature T s1 and the suction temperature T s_c in the current operating mode; obtains, in real time, a discharge temperature of the compressor 11 in the current operating mode of the air conditioner 1 according to the discharge temperature sensor 13, for example, denoted as T d , and a discharge temperature t1 seconds ago, for example, denoted as T d1 , to determine a target discharge temperature, for example, denoted as T d , according to the discharge temperature T d1 and the discharge temperature T d_c in the current operating mode; obtains, in real time, an operating frequency of the compressor 11 in the current operating mode of the air conditioner 1, for example, denoted as Fre c , and an operating frequency t1 seconds ago, for example, denoted as Fre1, to determine a target operating frequency of the compressor 11, for example, denoted as Fre c1 , according to the operating frequency Fre c2The operating frequency of the third target, for example, is denoted as Fre. c3 By obtaining the target operating frequency Fre of compressor 11 under the current operating mode c Target inhalation temperature T s_c Target exhaust temperature T d_c and the rotational speed V of indoor fan 12 a_2 The operating status of the air conditioner 1 on the cooling side and the indoor and outdoor ambient air status are determined based on the above operating parameters.

[0043] Understandably, the controller 17 obtains the suction temperature T of the compressor 11 in real time based on the suction temperature sensor 14. s and the inhalation temperature T 1 second ago s1 Then, the suction temperature T of compressor 11 is... s Inhalation temperature T 1 second ago s1 and the preset inhalation compensation coefficient, for example, denoted as Substitute the values ​​into the target inhalation temperature calculation formula to obtain the target inhalation temperature, for example, denoted as T. s_c The formula for calculating the target inhalation temperature is as follows:

[0044]

[0045] Similarly, the controller 17 obtains the exhaust temperature T of the compressor 11 in real time based on the exhaust temperature sensor 13. d And the exhaust temperature T 1 second ago d1 Then, the discharge temperature T of compressor 11 is... d Exhaust temperature T 1 second ago d1 and the preset exhaust compensation coefficient, for example, denoted as Substitute the values ​​into the target exhaust temperature calculation formula to obtain the target exhaust temperature, for example, denoted as T. d_c The formula for calculating the target exhaust temperature is as follows:

[0046]

[0047] Obtain the target operating frequency Fre of compressor 11 under the current operating mode. c Target inhalation temperature T s_c Target exhaust temperature T d_c and the rotational speed V of indoor fan 12 a_2 Then, based on the indoor coil temperature detected by the indoor coil temperature sensor 15 and the indoor ambient temperature detected by the indoor air environment sensor 16, and combined with the target intake temperature T, d_c and target exhaust temperature T s_c Determine the target indoor coil temperature and the target indoor ambient temperature, wherein the target indoor coil temperature includes, for example, a first target indoor coil temperature denoted as T. incoil_c_1The second target is the indoor coil temperature, for example, denoted as T. incoil_c_2 The third target indoor coil temperature is denoted as T. incoil_c_3 The target indoor ambient temperature includes the first target indoor ambient temperature, for example, denoted as T. air_c_1 The second target is the indoor ambient temperature, for example, denoted as T. air_c_2 The third target indoor ambient temperature, for example, denoted as T. air_c_3 To determine the target indoor coil temperature corresponding to different indoor coil temperatures, and the corresponding indoor ambient temperature corresponding to different indoor ambient temperatures.

[0048] After determining the target indoor coil temperature and the target indoor ambient temperature, based on the rotational speed V... a_2 Target operating frequency Fre c The heat transfer coefficient of air conditioner 1 is determined based on the target indoor ambient temperature, for example denoted as K. Here, the heat transfer coefficient K includes the heat transfer coefficient in the cooling mode, for example denoted as Kcooling. cold The heat transfer coefficient of the heating mode is denoted as K. heat In order to determine the heat transfer coefficient K of air conditioner 1 under different operating modes.

[0049] After determining the heat transfer coefficient K of air conditioner 1 under different operating modes, the real-time capacity of air conditioner 1 in the corresponding operating mode is determined based on the heat transfer coefficient K, the target indoor ambient temperature, and the target indoor coil temperature. For example, when air conditioner 1 is in cooling mode, the heat transfer coefficient K in cooling mode is used to determine the real-time capacity of air conditioner 1 in the corresponding operating mode. cold The cooling capacity of air conditioner 1 is determined by the target indoor ambient temperature and the target indoor coil temperature; when air conditioner 1 is in heating mode, the cooling capacity is determined based on the heat transfer coefficient K of the heating mode. heat The target indoor ambient temperature and target indoor coil temperature are used to determine the heating capacity of air conditioner 1, so as to determine the real-time capacity of air conditioner 1 under different operating modes.

[0050] According to an embodiment of the present invention, after the air conditioner 1 is turned on, it acquires the target operating frequency, target suction temperature, target discharge temperature of the compressor 11 and the speed of the indoor fan 12 under the current operating mode, determines the operating state of the air conditioner 1 and the indoor and outdoor ambient air conditions, calculates the heat transfer coefficient under different operating modes based on the above parameters, and then calculates the real-time capacity under different operating modes based on the heat transfer coefficient, that is, the cooling capacity and heating capacity of the air conditioner 1 are measured in real time. By calculating the real-time capacity of the air conditioner 1 based on the operating state parameters and indoor and outdoor environmental parameters, it is not necessary to calculate the capacity of the air conditioner 1 based on the enthalpy difference method, making the capacity calculation of the air conditioner 1 more convenient and accurate, and eliminating the need to add an additional device to realize the capacity detection of the air conditioner 1. Thus, while reducing the hardware space occupied by the air conditioner 1, the hardware cost is also reduced.

[0051] In some embodiments, when obtaining the target operating frequency of the compressor 11, the controller 17 is configured to: obtain a first operating frequency and a second operating frequency of the compressor 11; calculate the absolute value of the frequency difference between the first operating frequency and the second operating frequency; when the absolute value of the frequency difference does not exceed a first preset frequency deviation, substitute the first operating frequency, the second operating frequency, and a preset first frequency compensation coefficient into a first target frequency calculation formula to obtain a first target operating frequency, and use the first target operating frequency as the target operating frequency; when the absolute value of the frequency difference is between the first preset frequency deviation and the second preset frequency deviation, substitute the first operating frequency, the second operating frequency, the operating frequency change time, a preset second frequency compensation coefficient, and a preset third frequency compensation coefficient into a second target frequency calculation formula to obtain a second target operating frequency, and use the second target operating frequency as the target operating frequency; when the absolute value of the frequency difference exceeds the second preset frequency deviation, substitute the first operating frequency, the second operating frequency, the operating frequency change time, a preset fourth frequency compensation coefficient, a preset fifth frequency compensation coefficient, and a preset sixth frequency compensation coefficient into a third target frequency calculation formula to obtain a third target operating frequency, and use the third target operating frequency as the target operating frequency.

[0052] In an embodiment, such as Figure 2 The diagram shown is a flowchart illustrating how an air conditioner obtains the target operating frequency of its compressor according to an embodiment of the present invention. After the air conditioner 1 is turned on, the controller 17 acquires in real time the first operating frequency of the compressor 11 in the current operating mode of the air conditioner 1, i.e., the current operating frequency Fre of the compressor 11, and the second operating frequency, i.e., the operating frequency Fre1 of the compressor 11 seconds ago, to determine the operating status of the cooling side of the air conditioner 1. It also calculates the frequency difference between the first operating frequency Fre and the second operating frequency Fre1 and takes its absolute value, i.e., the absolute value of the frequency difference is |Fre-Fre1|. It then determines the relationship between the absolute value of the frequency difference |Fre-Fre1| and the first preset frequency deviation, denoted as ΔFre1, and the second preset frequency deviation, denoted as ΔFre2. If the absolute value of the frequency difference |Fre-Fre1| does not exceed the first preset frequency deviation ΔFre1, i.e., |Fre-Fre1| < ΔFre1, the operating frequency deviation is considered small. Then, the first operating frequency Fre, the second operating frequency Fre1, and the preset first frequency compensation coefficient, denoted as A1, are substituted into the first target operating frequency calculation formula to obtain the first target operating frequency, denoted as Fre. c1 and set the first target operating frequency Fre c1 As the target operating frequency Fre c .

[0053] When the absolute value of the frequency difference |Fre-Fre1| is between the first preset frequency deviation ΔFre1 and the second preset frequency deviation ΔFre2, i.e. ΔFre1≤|Fre-Fre1|≤ΔFre2, it is considered that the running frequency deviation is relatively large, and the first running frequency Fre, the second running frequency Fre1, the running frequency change time t1, the preset second frequency compensation coefficient A2, the preset third frequency compensation coefficient B2 and the preset fourth frequency compensation coefficient C2 are brought into the second target running frequency calculation formula to obtain the second target running frequency Fre c2 . c2 as the target running frequency Fre c .

[0054] When the absolute value of the frequency difference |Fre-Fre1| exceeds the second preset frequency deviation ΔFre2, i.e. |Fre-Fre1|>ΔFre2, it is considered that the running frequency deviation is very large, and the first running frequency Fre, the second running frequency Fre1, the running frequency change time t1, the preset fourth frequency compensation coefficient A3, the preset fifth frequency compensation coefficient B3 and the preset sixth frequency compensation coefficient C3 are brought into the third target running frequency calculation formula to obtain the third target running frequency Fre c3 . c3 as the target running frequency Fre c . By determining the corresponding target frequency Fre c under different running frequencies according to the size relationship between the absolute value of the frequency difference |Fre-Fre1| and the first preset frequency deviation ΔFre1 and the second preset frequency deviation ΔFre2, the running state of the air conditioner 1 is determined.

[0055] The method for an air conditioner to obtain a target running frequency of a compressor according to an embodiment of the present application will be described below with reference to Figure 2 .

[0056] As shown in Figure 2 , the method for an air conditioner to obtain a target running frequency of a compressor according to an embodiment of the present application at least includes steps S12-S21.

[0057] Step S12, obtaining a first running frequency and a second running frequency of the compressor.

[0058] Step S13, calculating an absolute value of a frequency difference of the first running frequency and the second running frequency.

[0059] Step S14, judging whether the frequency difference exceeds a first preset frequency deviation, if yes, executing step S16; if no, executing step S15.

[0060] Step S15, judge whether the frequency difference is between the first preset frequency deviation and the second preset frequency deviation, if yes, execute step S18; if no, execute step S20.

[0061] Step S16, bring the first running frequency, the second running frequency and the preset first frequency compensation coefficient into the first target frequency calculation formula to obtain the first target running frequency.

[0062] Step S17, take the first target running frequency as the target running frequency.

[0063] Step S18, bring the first running frequency, the second running frequency, the running frequency change time, the preset second frequency compensation coefficient and the preset third frequency compensation coefficient into the second target frequency calculation formula to obtain the second target running frequency.

[0064] Step S19, take the second target running frequency as the target running frequency.

[0065] Step S20, bring the first running frequency, the second running frequency, the running frequency change time, the preset fourth frequency compensation coefficient, the preset fifth frequency compensation coefficient and the preset sixth frequency compensation coefficient into the third target frequency calculation formula to obtain the third target running frequency.

[0066] Step S21, take the third target running frequency as the target running frequency.

[0067] In some embodiments, the first target frequency calculation formula comprises:

[0068]

[0069] Wherein, Fre c1 is the first target running frequency, Fre is the first running frequency, Fre1 is the second running frequency, and A1 is the preset first frequency compensation coefficient.

[0070] In an embodiment, after obtaining the first running frequency Fre, the second running frequency Fre1 and the preset first frequency compensation coefficient A1, the above parameters are brought into the first target frequency calculation formula, and the first target frequency calculation formula is as follows:

[0071]

[0072] By calculating the first target running frequency Fre c1 , the target running frequency Fre c of the compressor 11 is determined.

[0073] In some embodiments, the second target frequency calculation formula comprises:

[0074]

[0075] wherein, Fre c2 is the second target operating frequency, Fre is the first operating frequency, Fre1 is the second operating frequency, A2 is a preset second frequency compensation coefficient, B2 is a preset third frequency compensation coefficient, and t1 is an operating frequency change time.

[0076] In an embodiment, after the first operating frequency Fre, the second operating frequency Fre1, the operating frequency change time t1, the preset second frequency compensation coefficient A2, and the preset third frequency compensation coefficient B2 are obtained, the above parameters are brought into the second target frequency calculation formula, and the second target frequency calculation formula is as follows:

[0077]

[0078] The second target operating frequency Fre c2 is calculated, and thus the target operating frequency Fre c of the compressor 11 is determined.

[0079] In some embodiments, the third target frequency calculation formula comprises:

[0080]

[0081] wherein, Fre c3 is the third target operating frequency, Fre is the first operating frequency, Fre1 is the second operating frequency, A3 is a preset fourth frequency compensation coefficient, B3 is a preset fifth frequency compensation coefficient, and C3 is a preset sixth frequency compensation coefficient.

[0082] In an embodiment, after the first operating frequency Fre, the second operating frequency Fre1, the operating frequency change time t1, the preset fourth frequency compensation coefficient A3, the preset fifth frequency compensation coefficient B3, and the preset sixth frequency compensation coefficient C3 are obtained, the above parameters are brought into the third target frequency calculation formula, and the third target frequency calculation formula is as follows:

[0083]

[0084] The third target operating frequency Fre c3 is calculated, and thus the target operating frequency Fre c of the compressor 11 is determined.

[0085] By determining the first target operating frequency Fre c1 , the second target operating frequency Fre c2 , and the third target operating frequency Fre c3 , the corresponding target operating frequency Fre cThis is to determine the operating status of air conditioner 1.

[0086] In some embodiments, when determining the target indoor coil temperature based on the target intake temperature and the target exhaust temperature, the controller 17 is configured to: acquire a first indoor coil temperature and a second indoor coil temperature; substitute the first indoor coil temperature, the second indoor coil temperature, and a preset first coil temperature compensation coefficient into the first target indoor coil temperature calculation formula to obtain the first target indoor coil temperature, and use the first target indoor coil temperature as the target indoor coil temperature; substitute the first indoor coil temperature, the second indoor coil temperature, the target intake temperature, the preset second coil temperature compensation coefficient, and the preset third coil temperature compensation coefficient into the second target indoor coil temperature calculation formula to obtain the second target indoor coil temperature, and use the second target indoor coil temperature as the target indoor coil temperature; substitute the first indoor coil temperature, the second indoor coil temperature, the target exhaust temperature, the preset fourth coil temperature compensation coefficient, and the preset fifth coil temperature compensation coefficient into the third target indoor coil temperature calculation formula to obtain the third target indoor coil temperature, and use the third target indoor coil temperature as the target indoor coil temperature.

[0087] In an embodiment, such as Figure 3 The diagram shows a flowchart of an air conditioner determining a target indoor coil temperature according to an embodiment of the present invention. After the air conditioner 1 is turned on, the controller 17 detects the indoor coil temperature based on the indoor coil temperature sensor 15, and obtains the first indoor coil temperature in the current operating mode of the air conditioner 1 in real time, i.e., the current indoor coil temperature, for example, denoted as T. incoil And the second indoor coil temperature, i.e., the indoor coil temperature t1 seconds ago, for example denoted as T. incoil_1 .

[0088] Obtain the first indoor coil temperature, i.e., the current indoor coil temperature T. incoil And the second indoor coil temperature, i.e., the indoor coil temperature T 1 seconds ago. incoil_1 Then, set the temperature T of the first indoor coil. incoil Second indoor coil temperature T incoil_1 and the preset first coil temperature compensation coefficient, for example, denoted as: Substitute the values ​​into the formula for calculating the first target indoor coil temperature to obtain the first target indoor coil temperature, for example, denoted as T. incoil_c_1 And set the first target indoor coil temperature T incoil_c_1 The target indoor coil temperature.

[0089] Obtain the first indoor coil temperature, i.e., the current indoor coil temperature T. incoil And the second indoor coil temperature, i.e., the indoor coil temperature T 1 seconds ago. incoil_1 Then, set the temperature T of the first indoor coil. incoil Second indoor coil temperature Tincoil_1 , target exhaust temperature T d_c , preset second coil temperature compensation coefficient, for example, denoted as Preset third coil temperature compensation coefficient, for example, denoted as Second target indoor coil temperature calculation formula is brought in to obtain the second target indoor coil temperature, for example, denoted as T incoil_c_2 , and the second target indoor coil temperature T incoil_c_2 is taken as the target indoor coil temperature.

[0090] The first indoor coil temperature, that is, the current indoor coil temperature T incoil , and the second indoor coil temperature, that is, the indoor coil temperature T incoil_1 one second ago, are obtained. incoil , the second indoor coil temperature T incoil_1 , the target suction temperature T s_c , the preset fourth coil temperature compensation coefficient, for example, denoted as Preset fifth coil temperature compensation coefficient, for example, denoted as Third target indoor coil temperature calculation formula is brought in to obtain the third target indoor coil temperature, for example, denoted as T incoil_c_3 , and the third target indoor coil temperature T incoil_c_3 is taken as the target indoor coil temperature.

[0091] By determining the target indoor coil temperature according to the target suction temperature T s_c , the target exhaust temperature T d_c , the first indoor coil temperature T incoil , and the second indoor coil temperature T incoil_1 , the corresponding target indoor coil temperature at different indoor coil temperatures is determined to determine the state of the indoor environment air of the air conditioner 1.

[0092] In some embodiments, the first target indoor coil temperature calculation formula comprises:

[0093]

[0094] Wherein, T incoil_c_1 is the first target indoor coil temperature, T incoil is the first indoor coil temperature, T incoil_1 is the second indoor coil temperature, is the preset first coil temperature compensation coefficient.

[0095] In an embodiment, the first indoor coil temperature T incoil , the second indoor coil temperature T incoil_1 and the preset first coil temperature compensation coefficient Then, substitute the above parameters into the formula for calculating the first target indoor coil temperature. The formula for calculating the first target indoor coil temperature is as follows:

[0096]

[0097] By calculating the first target indoor coil temperature T incoil_c_1 This allows us to determine the target indoor coil temperature.

[0098] In some embodiments, the formula for calculating the second target indoor coil temperature includes:

[0099]

[0100] Among them, T incoil_c_2 The second target is the indoor coil temperature, T incoii T represents the temperature of the first indoor coil. incoil_1 The temperature of the second indoor coil. To preset the temperature compensation coefficient for the second coil, To preset the temperature compensation coefficient for the third coil, T s_c Target inhalation temperature.

[0101] In this embodiment, the temperature T of the first indoor coil is obtained. incoil Second indoor coil temperature T incoil_1 Target inhalation temperature T s_c Preset the temperature compensation coefficient for the second coil. Preset third coil temperature compensation coefficient Then, substitute the above parameters into the formula for calculating the second target indoor coil temperature. The formula for calculating the second target indoor coil temperature is as follows:

[0102]

[0103] By calculating the second target indoor coil temperature T incoil_c_2 This allows us to determine the target indoor coil temperature.

[0104] In some embodiments, the formula for calculating the third target indoor coil temperature includes:

[0105]

[0106] Among them, T incoil_c_3 The third target is the indoor coil temperature, T incoil T represents the temperature of the first indoor coil. incoil_1 The temperature of the second indoor coil. To preset the temperature compensation coefficient for the fourth coil, To preset the temperature compensation coefficient for the fifth coil, T d_c The target exhaust temperature.

[0107] In this embodiment, the temperature T of the first indoor coil is obtained. incoil Second indoor coil temperature T incoil_1 Target exhaust temperature T d_c Preset fourth coil temperature compensation coefficient Preset fifth coil temperature compensation coefficient Then, substitute the above parameters into the formula for calculating the indoor coil temperature of the third target. The formula for calculating the indoor coil temperature of the third target is as follows:

[0108]

[0109] By calculating the third target indoor coil temperature T incoil_c_3 This allows us to determine the target indoor coil temperature.

[0110] By determining the first target indoor coil temperature T incoil_c_1 The second target is the indoor coil temperature T. incoil_c_2 and the third target indoor coil temperature T incoil_c_3 This allows us to determine the target indoor coil temperature corresponding to different indoor coil temperatures, thereby determining the indoor ambient air condition of air conditioner 1.

[0111] In some embodiments, when determining the target indoor ambient temperature based on the target intake temperature and the target exhaust temperature, the controller 17 is configured to: acquire a first indoor ambient temperature and a second indoor ambient temperature; substitute the first indoor ambient temperature, the second indoor ambient temperature, and a preset first indoor temperature compensation coefficient into a first target indoor ambient temperature calculation formula to obtain a first target indoor ambient temperature, and use the first target indoor ambient temperature as the target indoor ambient temperature; substitute the first indoor ambient temperature, the second indoor ambient temperature, the first indoor coil temperature, a preset second air temperature compensation coefficient, a preset third air temperature compensation coefficient, and a preset sixth coil temperature compensation coefficient into a second target indoor ambient temperature calculation formula to obtain a second target indoor ambient temperature, and use the second target indoor ambient temperature as the target indoor ambient temperature; substitute the first indoor ambient temperature, the second indoor ambient temperature, the target exhaust temperature, a preset fourth air temperature compensation coefficient, a preset fifth air temperature compensation coefficient, and a preset exhaust temperature compensation coefficient into a third target indoor ambient temperature calculation formula to obtain a third target indoor ambient temperature, and use the third target indoor ambient temperature as the target indoor ambient temperature.

[0112] In an embodiment, such as Figure 4 The diagram shows a flowchart illustrating how an air conditioner determines a target indoor ambient temperature according to an embodiment of the present invention. After the air conditioner 1 is turned on, the controller 17 detects the indoor ambient temperature using the indoor air environment sensor 16 and obtains the first indoor ambient temperature (i.e., the current indoor ambient temperature) in the current operating mode of the air conditioner 1 in real time, for example, denoted as T.air And the second indoor ambient temperature, i.e., the indoor ambient temperature t1 seconds ago, for example denoted as T. air_1 .

[0113] Obtain the first indoor ambient temperature under the current operating mode, i.e., the current indoor ambient temperature T. air And the second indoor ambient temperature, i.e., the indoor ambient temperature T 1 second ago. air_1 Then, the first indoor ambient temperature T air Second indoor ambient temperature T air_r and the preset first indoor temperature compensation coefficient, for example, denoted as Substitute the values ​​into the formula for calculating the first target indoor ambient temperature to obtain the first target indoor ambient temperature, for example, denoted as T. air_c_1 And set the first target indoor ambient temperature T air_c_1 The target indoor ambient temperature is used as the reference temperature.

[0114] Obtain the first indoor ambient temperature under the current operating mode, i.e., the current indoor ambient temperature T. air And the second indoor ambient temperature, i.e., the indoor ambient temperature T 1 second ago. air_1 Then, the first indoor ambient temperature T air Second indoor ambient temperature T air_1 The first indoor coil temperature T incoil The preset second air temperature compensation coefficient is denoted as follows: The preset third air temperature compensation coefficient is denoted as follows: The preset sixth coil temperature compensation coefficient, denoted as c2, is substituted into the formula for calculating the second target indoor ambient temperature to obtain the second target indoor ambient temperature, denoted as T. air_c_2 And the second target indoor ambient temperature T air_c_2 The target indoor ambient temperature.

[0115] Obtain the first indoor ambient temperature under the current operating mode, i.e., the current indoor ambient temperature T. air And the second indoor ambient temperature, i.e., the indoor ambient temperature T 1 second ago. air_1 Then, the first indoor ambient temperature T air Second indoor ambient temperature T air_1 Target exhaust temperature T d_c The preset fourth air temperature compensation coefficient is denoted as follows: The preset fifth air temperature compensation coefficient is denoted as follows: The preset exhaust temperature compensation coefficient, denoted as c3, is substituted into the formula for calculating the third target indoor ambient temperature to obtain the third target indoor ambient temperature, denoted as T. air_c_3 And the third target indoor ambient temperature T air_c_3 The target indoor ambient temperature is used as the reference temperature.

[0116] The target indoor environment temperature is determined by determining the target indoor environment temperature according to the target suction temperature T s_c , the target exhaust temperature T d_c , the first indoor environment temperature T air , and the second indoor environment temperature T air_1 , so as to determine the corresponding target indoor environment temperature at different indoor environment temperatures, so as to determine the indoor environment air state of the air conditioner 1.

[0117] In some embodiments, the first target indoor environment temperature calculation formula comprises:

[0118]

[0119] Wherein, T air_c_1 is the first target indoor environment temperature, T air is the first indoor environment temperature, T air_1 is the second indoor environment temperature, is a preset first indoor temperature compensation coefficient.

[0120] In an embodiment, after obtaining the first indoor environment temperature T air , the second indoor environment temperature T air_1 and the preset first indoor temperature compensation coefficient , the above parameters are brought into the first target indoor environment temperature calculation formula, and the first target indoor environment temperature calculation formula is as follows:

[0121]

[0122] The target indoor environment temperature is determined by calculating the first target indoor environment temperature T air_c_1 .

[0123] In some embodiments, the second target indoor environment temperature calculation formula comprises:

[0124]

[0125] Wherein, T air_c_2 is the second target indoor environment temperature, T air is the first indoor environment temperature, T air_1 is the second indoor environment temperature, T incoil is the first indoor coil temperature, is a preset second air temperature compensation coefficient, is a preset third air temperature compensation coefficient, and c2 is a preset sixth coil temperature compensation coefficient.

[0126] In an embodiment, after obtaining the first indoor environment temperature T air , the second indoor environment temperature Tair_1 , the first indoor coil temperature T incoil , the preset second air temperature compensation coefficient the preset third air temperature compensation coefficient After the preset sixth coil temperature compensation coefficient c2, the above parameters are brought into the second target indoor environment temperature calculation formula, and the second target indoor environment temperature calculation formula is as follows:

[0127]

[0128] The second target indoor environment temperature T air_c_2 is calculated, and the target indoor environment temperature is determined.

[0129] In some embodiments, the third target indoor environment temperature calculation formula includes:

[0130]

[0131] Wherein, T air_c_3 is the third target indoor environment temperature, T air is the first indoor environment temperature, T air_1 is the second indoor environment temperature, T d_c is the target exhaust temperature, is the preset fourth air temperature compensation coefficient, is the preset fifth air temperature compensation coefficient, and c3 is the preset exhaust temperature compensation coefficient.

[0132] In an embodiment, after obtaining the first indoor environment temperature T air , the second indoor environment temperature T air_1 , the target exhaust temperature T d_c , the preset fourth air temperature compensation coefficient the preset fifth air temperature compensation coefficient and the preset exhaust temperature compensation coefficient c3, the above parameters are brought into the third target indoor environment temperature calculation formula, and the third target indoor environment temperature calculation formula is as follows:

[0133]

[0134] The third target indoor environment temperature T air_c_3 is calculated, and the target indoor environment temperature is determined.

[0135] By determining the first target indoor environment temperature T air_c_1 , the second target indoor environment temperature T air_c_2 and the third target indoor environment temperature T air_c_3 , the corresponding target indoor environment temperature under different indoor environment temperatures is determined, so as to determine the indoor environment air state of the air conditioner 1.

[0136] In some embodiments, when determining the heat transfer coefficient of the air conditioner 1 based on the rotation speed, target operating frequency, and target indoor ambient temperature, the controller 17 is configured to: when the air conditioner 1 is in cooling mode or dehumidification mode, input the rotation speed, target operating frequency, first target indoor ambient temperature, and second target indoor ambient temperature into the first heat transfer coefficient calculation formula to obtain the cooling mode heat transfer coefficient; when the air conditioner 1 is in heating mode, input the rotation speed, target operating frequency, first target indoor ambient temperature, and third target indoor ambient temperature into the second heat transfer coefficient calculation formula to obtain the heating mode heat transfer coefficient.

[0137] In an embodiment, such as Figure 5 The diagram shows a flowchart for determining the heat transfer coefficient of an air conditioner according to an embodiment of the present invention. After determining the target indoor coil temperature and the target indoor ambient temperature, the operating mode of the air conditioner is obtained, and it is determined whether the air conditioner 1 is in cooling mode or dehumidification mode. When the air conditioner 1 is in cooling mode or dehumidification mode, the rotation speed V is increased. a_2 Target operating frequency Fre c The first target is the indoor ambient temperature T. air_c_1 and the second target indoor ambient temperature T air_c_2 Substituting into the formula for calculating the first heat transfer coefficient, we can determine the first heat transfer coefficient, which is the heat transfer coefficient in the cooling mode, for example, denoted as K. cold .

[0138] When air conditioner 1 is in heating mode, the speed V will be... a_2 Target operating frequency Fre c The first target is the indoor ambient temperature T. air_c_1 and the third target indoor ambient temperature T air_c_3 Substituting into the formula for calculating the second heat transfer coefficient, the second heat transfer coefficient, i.e., the heat transfer coefficient K of the heating mode, is determined according to the formula. heat .

[0139] The first heat transfer coefficient, i.e., the heat transfer coefficient K in the cooling mode, is determined according to the formula for calculating the first heat transfer coefficient. cold The second heat transfer coefficient, i.e., the heating mode heat transfer coefficient K, is determined according to the second heat transfer calculation formula. heat This allows us to determine the heat transfer coefficient K corresponding to different operating modes.

[0140] In some embodiments, the formula for calculating the first heat transfer coefficient includes:

[0141] K cold =A K_1 *V a_1 +B K_1 *(T air_c_1 +C K_1 *Tair_c_2 )+D K_1 *(Fre c ) b_2

[0142] wherein, K cold is a heat transfer coefficient in cooling mode, V a_1 is a rotating speed, Fre c is a target operating frequency, T air_c_1 is a first target indoor environment temperature, T air_c_2 is a second target indoor environment temperature, A K_1 is a preset first rotating speed compensation coefficient, B K_1 is a preset first target environment temperature compensation coefficient, C K_1 is a preset second target environment temperature compensation coefficient, and D K_1 is a preset first frequency compensation coefficient.

[0143] In an embodiment, after the rotating speed V a_2 , the target operating frequency Fre c , the first target indoor environment temperature T air_c_1 , and the second target indoor environment temperature T air_c_2 are obtained, a preset first rotating speed compensation coefficient, for example, denoted as A K_r , a preset first target environment temperature compensation coefficient, for example, denoted as B K_1 , a preset second target environment temperature compensation coefficient, for example, denoted as C K_1 , and a preset first frequency compensation coefficient, for example, denoted as D K_1 are obtained. The above parameters are brought into a first heat transfer coefficient calculation formula, which is as follows:

[0144] K cold = A K_1 *V a_1 +B K_1 *(T air_c_1 +C K_1 *T air_c_2 )+D K_1 *(Fre c ) b_2

[0145] By calculating the first heat transfer coefficient, i.e., the heat transfer coefficient K cold in cooling mode, the cooling capacity Q cold of the air conditioner 1 in cooling mode is determined according to the heat transfer coefficient K cold .

[0146] In some embodiments, the second heat transfer coefficient calculation formula includes:

[0147] K heat =A K_2*V a_2 +B K_2 *(T air_c_1 +C K_2 *T air_c_3 )+D K_2 *(Fre c ) b_2

[0148] wherein, K heat is the heat transfer coefficient in the heating mode, V a_2 is the rotating speed, Fre c is the target operating frequency, T air_c_1 is the first target indoor environment temperature, T air_c_3 is the third target indoor environment temperature, A K_2 is a preset second rotating speed compensation coefficient, B K_2 is a preset third target environment temperature compensation coefficient, C K_2 is a preset fourth target environment temperature compensation coefficient, and D K_2 is a preset second frequency compensation coefficient.

[0149] In the embodiment, after the rotating speed V a_2 , the target operating frequency Fre c , the first target indoor environment temperature T air_c_1 , and the third target indoor environment temperature T air_c_3 are obtained, a preset second rotating speed compensation coefficient, for example, denoted as A K_2 , a preset third target environment temperature compensation coefficient, for example, denoted as B K_2 , a preset fourth target environment temperature compensation coefficient, for example, denoted as C K_2 , and a preset second frequency compensation coefficient, for example, denoted as D K_2 are obtained. The above parameters are brought into the second heat transfer coefficient calculation formula, and the second heat transfer coefficient calculation formula is as follows:

[0150] K heat = A K_2 *V a_2 +B K_2 *(T air_c_1 +C K_2 *T air_c_3 )+D K_2 *(Fre c ) b_2

[0151] The second heat transfer coefficient, that is, the heat transfer coefficient K heat in the heating mode is calculated, so that the heat quantity Q heat in the heating mode when the air conditioner 1 is in the heating mode is determined according to the heat transfer coefficient K heat .

[0152] In some embodiments, when determining the cooling capacity or heating capacity of the air conditioner 1 in the current operation mode according to the heat transfer coefficient, the target indoor environment temperature and the target indoor coil temperature, the controller 17 is configured to: input the cooling mode heat transfer coefficient, the first target indoor environment temperature, the second target indoor environment temperature, the first target indoor coil temperature, the second target indoor coil temperature, the preset cooling capacity compensation coefficient and the preset heat exchange area into the cooling capacity calculation formula to determine the cooling capacity of the air conditioner 1; and input the heating mode heat transfer coefficient, the first target indoor environment temperature, the third target indoor environment temperature, the first target indoor coil temperature, the third target indoor coil temperature, the preset heating capacity compensation coefficient and the preset heat exchange area into the heating capacity calculation formula to determine the heating capacity of the air conditioner 1.

[0153] In an embodiment, the cooling mode heat transfer coefficient K cold is determined, and then the first target indoor environment temperature T air_c_1 , the second target indoor environment temperature T air_c_2 , the first target indoor coil temperature T incoil_c_1 , the second target indoor coil temperature T incoil_c_2 , the preset cooling capacity compensation coefficient C Q_cold and the preset heat exchange area A are obtained. cold .

[0154] The heating mode heat transfer coefficient K heat is determined, and then the first target indoor environment temperature T air_c_1 , the third target indoor environment temperature T air_c_3 , the first target indoor coil temperature T incoil_c_1 , the third target indoor coil temperature T incoil_c_3 , the preset heating capacity compensation coefficient C Q_heat and the preset heat exchange area A are obtained. heat .

[0155] In some embodiments, the cooling capacity calculation formula comprises:

[0156] Q cold = a cold *K cold *(T air_c_1 -T incoil_c_1 )*A+K cold *(T air_c_2 -T incoil_c_2 )*A+C Q_cold

[0157] wherein Q cold is the cooling capacity, a coldK is a preset first heat transfer compensation coefficient cold T is a heat transfer coefficient for cooling mode air_c_1 T is a first target indoor environment temperature air_c_2 T is a second target indoor environment temperature incoil_c_1 T is a first target indoor coil temperature incoil_c_2 T is a second target indoor coil temperature A is a preset heat exchange area Q_cold C is a preset refrigerating capacity compensation coefficient.

[0158] In an embodiment, the heat transfer coefficient K cold for cooling mode, the first target indoor environment temperature T air_c_1 , the second target indoor environment temperature T air_c_2 , the first target indoor coil temperature T incoil_c_1 , the second target indoor coil temperature T incoil_c_2 , the preset refrigerating capacity compensation coefficient C Q_cold and the preset heat exchange area A are determined, and the above parameters are brought into a refrigerating capacity calculation formula, which is as follows:

[0159] Q cold = a cold *K cold *(T air_c_1 -Ti ncoil_c_1 )*A+K cold *(T air_c_2 -T incoil_c_2 )*A+C Q_cold

[0160] By calculating the refrigerating capacity Q cold of the air conditioner 1, the real-time capacity of the air conditioner 1 in the cooling operation mode is determined.

[0161] The heating capacity calculation formula includes:

[0162] Q heat = a heat *K heat *(Ti ncoil_c_1 -T air_c_1 )+K heat *(T incoil_c_3 -T air_c_3 )*A+C Q_heat

[0163] Wherein, Q heat is a heating capacity, a heat is a preset second heat transfer compensation coefficient, K heat is a heat transfer coefficient for heating mode, T air_c_1 is a first target indoor environment temperature, T air_c_3 is a third target indoor environment temperature, T incoil_c_1is a first target indoor coil temperature, T incoil_c_3 is a third target indoor coil temperature, A is a preset heat exchange area, C Q_heat is a preset heating capacity compensation coefficient.

[0164] In an embodiment, the heating mode heat transfer coefficient K heat , the first target indoor environment temperature T air_c_1 , the third target indoor environment temperature T air_c_3 , the first target indoor coil temperature T incoil_c_1 , the third target indoor coil temperature T incoil_c_3 , and the preset heating capacity compensation coefficient C Q_heat and the preset heat exchange area A are determined, and the above parameters are brought into the heating capacity calculation formula, and the heating capacity calculation formula is as follows:

[0165] Q heat = a heat *K heat *(T incoil_c_1 -T air_c_1 )+K heat *(T incoil_c_3 -T air_c_3 )*A+C Q_heat

[0166] By calculating the heating capacity Q heat of the air conditioner 1, the real-time capacity of the air conditioner 1 in the heating operation mode is determined.

[0167] By calculating the refrigerating capacity Q cold and the heating capacity Q heat of the air conditioner 1 according to the refrigeration mode heat transfer coefficient K cold and the heating mode heat transfer coefficient K heat , the real-time capacity of the air conditioner 1 in different operation modes is determined, and the calculation method makes the capacity calculation of the air conditioner 1 more convenient and accurate.

[0168] The capacity calculation method of the air conditioner of the embodiment of the present application will be illustrated below with reference to Figure 6 .

[0169] As shown in Figure 6 , the capacity calculation method of the air conditioner of the embodiment of the present application at least includes steps S11-S40.

[0170] Step S11, the target suction temperature, the target discharge temperature and the speed of the indoor fan are obtained.

[0171] Step S12, the first operation frequency and the second operation frequency of the compressor are obtained.

[0172] Step S13, calculating the absolute value of the frequency difference between the first operating frequency and the second operating frequency.

[0173] Step S14, judging whether the frequency difference exceeds the first preset frequency deviation, if yes, executing step S16; if no, executing step S15.

[0174] Step S15, judging whether the frequency difference is between the first preset frequency deviation and the second preset frequency deviation, if yes, executing step S18; if no, executing step S20.

[0175] Step S16, bringing the first operating frequency, the second operating frequency and the preset first frequency compensation coefficient into the first target frequency calculation formula to obtain the first target operating frequency.

[0176] Step S17, taking the first target operating frequency as the target operating frequency.

[0177] Step S18, bringing the first operating frequency, the second operating frequency, the operating frequency change time, the preset second frequency compensation coefficient and the preset third frequency compensation coefficient into the second target frequency calculation formula to obtain the second target operating frequency.

[0178] Step S19, taking the second target operating frequency as the target operating frequency.

[0179] Step S20, bringing the first operating frequency, the second operating frequency, the operating frequency change time, the preset fourth frequency compensation coefficient, the preset fifth frequency compensation coefficient and the preset sixth frequency compensation coefficient into the third target frequency calculation formula to obtain the third target operating frequency.

[0180] Step S21, taking the third target operating frequency as the target operating frequency.

[0181] Step S22, obtaining the first indoor coil temperature and the second indoor coil temperature.

[0182] Step S23, bringing the first indoor coil temperature, the second indoor coil temperature and the preset first coil temperature compensation coefficient into the first target indoor coil temperature calculation formula to obtain the first target indoor coil temperature.

[0183] Step S24, taking the first target indoor coil temperature as the target indoor coil temperature.

[0184] Step S25, bringing the first indoor coil temperature, the second indoor coil temperature, the target suction temperature, the preset second coil temperature compensation coefficient and the preset third coil temperature compensation coefficient into the second target indoor coil temperature calculation formula.

[0185] Step S26, taking the second target indoor coil temperature as the target indoor coil temperature.

[0186] Step S27, the first indoor coil temperature, the second indoor coil temperature, the target exhaust temperature, the preset fourth coil temperature compensation coefficient, and the preset fifth coil temperature compensation coefficient are brought into the third target indoor coil temperature calculation formula.

[0187] Step S28, the third target indoor coil temperature is taken as the target indoor coil temperature.

[0188] Step S29, the first indoor environment temperature and the second indoor environment temperature are obtained.

[0189] Step S30, the first indoor environment temperature, the second indoor environment temperature, and the preset first indoor temperature compensation coefficient are brought into the first target indoor environment temperature calculation formula to obtain the first target indoor environment temperature.

[0190] Step S31, the first target indoor environment temperature is taken as the target indoor environment temperature.

[0191] Step S32, the first indoor environment temperature, the second indoor environment temperature, the first indoor coil temperature, the preset second air temperature compensation coefficient, the preset third air temperature compensation coefficient, and the preset sixth coil temperature compensation coefficient are brought into the second target indoor environment temperature calculation formula to obtain the second target indoor environment temperature.

[0192] Step S33, the second target indoor environment temperature is taken as the target indoor environment temperature.

[0193] Step S34, the first indoor environment temperature, the second indoor environment temperature, the target exhaust temperature, the preset fourth air temperature compensation coefficient, the preset fifth air temperature compensation coefficient, and the preset exhaust temperature compensation coefficient are brought into the third target indoor environment temperature calculation formula to obtain the third target indoor environment temperature.

[0194] Step S35, the third target indoor environment temperature is taken as the target indoor environment temperature.

[0195] Step S36, it is judged whether the air conditioner is in a cooling mode or a dehumidification mode, if yes, step S39 is executed; if not, step S37 is executed.

[0196] Step S37, the rotating speed, the target operating frequency, the first target indoor environment temperature, and the third target indoor environment temperature are brought into the second heat transfer coefficient calculation formula to obtain the heat transfer coefficient in the heating mode.

[0197] Step S38, the heat transfer coefficient in the heating mode, the first target indoor environment temperature, the third target indoor environment temperature, the first target indoor coil temperature, the third target indoor coil temperature, the preset heating capacity compensation coefficient, and the preset heat exchange area are brought into the heating capacity calculation formula to determine the heating capacity of the air conditioner.

[0198] Step S39, the rotation speed, the target operating frequency, the first target indoor environment temperature and the second target indoor environment temperature are brought into the first heat transfer coefficient calculation formula to obtain the heat transfer coefficient in the cooling mode.

[0199] Step S40, the heat transfer coefficient in the cooling mode, the first target indoor environment temperature, the second target indoor environment temperature, the first target indoor coil temperature, the second target indoor coil temperature, the preset cooling capacity compensation coefficient and the preset heat exchange area are brought into the cooling capacity calculation formula to determine the cooling capacity of the air conditioner.

[0200] According to the air conditioner 1 of the embodiment of the present application, after starting operation, the target operating frequency, the target suction temperature, the target discharge temperature of the compressor 11 and the rotation speed of the indoor fan 12 in the current operating mode are obtained, the operating state of the air conditioner 1 and the indoor and outdoor environment air state are determined, the heat transfer coefficient in different operating modes is calculated according to the above parameters, the real-time capacity in different operating modes is calculated according to the heat transfer coefficient, that is, the cooling capacity and the heating capacity of the air conditioner 1 are measured and calculated in real time, the real-time capacity of the air conditioner 1 is calculated according to the operating state parameters and the indoor and outdoor environment parameters of the air conditioner 1, the capacity of the air conditioner 1 is calculated without the enthalpy difference method, so that the capacity calculation of the air conditioner 1 is more convenient and accurate, and the hardware cost is reduced without increasing additional devices to detect the capacity of the air conditioner 1, so that the hardware occupation space of the air conditioner 1 is reduced, and the hardware cost is reduced.

[0201] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example.

[0202] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An air conditioner characterized by comprising: The air conditioner comprises: a compressor for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the refrigerant gas to a condenser; an indoor fan for driving indoor air to exchange heat with an indoor heat exchanger and then discharging the indoor air from an air outlet; an exhaust temperature sensor for detecting an exhaust temperature of the compressor; a suction temperature sensor for detecting a suction temperature of the compressor; an indoor coil temperature sensor for detecting an indoor coil temperature; an indoor air environment sensor for detecting an indoor environment temperature; a controller configured to: obtain a target operating frequency, a target suction temperature, a target exhaust temperature of the compressor and a rotating speed of the indoor fan in a current operating mode; determine a target indoor coil temperature and a target indoor environment temperature according to the target suction temperature and the target exhaust temperature; determine a heat transfer coefficient of the air conditioner according to the rotating speed, the target operating frequency and the target indoor environment temperature; determine a refrigerating capacity or a heating capacity of the air conditioner in the current operating mode according to the heat transfer coefficient, the target indoor environment temperature and the target indoor coil temperature.

2. The air conditioner of claim 1, wherein When obtaining the target operating frequency of the compressor, the controller is configured to: obtain a first operating frequency and a second operating frequency of the compressor; calculate an absolute value of a frequency difference between the first operating frequency and the second operating frequency; when the absolute value of the frequency difference is less than a first preset frequency deviation, input the first operating frequency, the second operating frequency and a preset first frequency compensation coefficient into a first target frequency calculation formula to obtain a first target operating frequency, and take the first target operating frequency as the target operating frequency; when the absolute value of the frequency difference is between the first preset frequency deviation and a second preset frequency deviation, input the first operating frequency, the second operating frequency, an operating frequency change time, a preset second frequency compensation coefficient and a preset third frequency compensation coefficient into a second target frequency calculation formula to obtain a second target operating frequency, and take the second target operating frequency as the target operating frequency; when the absolute value of the frequency difference is greater than the second preset frequency deviation, input the first operating frequency, the second operating frequency, the operating frequency change time, a preset fourth frequency compensation coefficient, a preset fifth frequency compensation coefficient and a preset sixth frequency compensation coefficient into a third target frequency calculation formula to obtain a third target operating frequency, and take the third target operating frequency as the target operating frequency.

3. The air conditioner according to claim 2, wherein The first target frequency calculation formula comprises: Wherein, the Fre c1 The first target operating frequency is Fre, the first operating frequency is Fre, the second operating frequency is Fre1, and the preset first frequency compensation coefficient is A1. The second target frequency calculation formula comprises: Wherein, the Fre c2 The second target operating frequency is Fre, the first operating frequency is Fre, the second operating frequency is Fre1, the preset second frequency compensation coefficient is A2, the preset third frequency compensation coefficient is B2, and the operating frequency change time is t1. The third target frequency calculation formula comprises: Wherein, the Fre c3 The third target operating frequency, the Fre is the first operating frequency, the Fre1 is the second operating frequency, the A3 is the preset fourth frequency compensation coefficient, the B3 is the preset fifth frequency compensation coefficient, and the C3 is the preset sixth frequency compensation coefficient.

4. The air conditioner of claim 1, wherein when determining the target indoor coil temperature according to the target suction temperature and the target exhaust temperature, the controller is configured to: obtain a first indoor coil temperature and a second indoor coil temperature; input the first indoor coil temperature, the second indoor coil temperature and a preset first coil temperature compensation coefficient into a first target indoor coil temperature calculation formula to obtain a first target indoor coil temperature, and take the first target indoor coil temperature as the target indoor coil temperature; The first indoor coil temperature, the second indoor coil temperature, the target suction temperature, a preset second coil temperature compensation coefficient, and a preset third coil temperature compensation coefficient are brought into a second target indoor coil temperature calculation formula to obtain a second target indoor coil temperature, and the second target indoor coil temperature is taken as the target indoor coil temperature. The first indoor coil temperature, the second indoor coil temperature, the target discharge temperature, a preset fourth coil temperature compensation coefficient, and a preset fifth coil temperature compensation coefficient are brought into a third target indoor coil temperature calculation formula to obtain a third target indoor coil temperature, and the third target indoor coil temperature is taken as the target indoor coil temperature. 5.The air conditioner of claim 4, wherein The first target indoor coil temperature calculation formula comprises: Wherein, the T incoil_c_1 is the first target indoor coil temperature, the T incoil is the first indoor coil temperature, the T incoil_1 is the second indoor coil temperature, is a preset first coil temperature compensation coefficient; The second target indoor coil temperature calculation formula comprises: Wherein, T incoil_c_2 is the second target indoor coil temperature, T incoil is the first indoor coil temperature, the T incoil_1 is the second indoor coil temperature, is a preset second coil temperature compensation coefficient, is a preset third coil temperature compensation coefficient, T s_c is the target suction temperature; The third target indoor coil temperature calculation formula comprises: Wherein, T incoil_c_3 is the third target indoor coil temperature, T incoil is the first indoor coil temperature, T incoil_1 is the second indoor coil temperature, T d_c is the target exhaust temperature, is a preset fourth coil temperature compensation coefficient, is a preset fifth coil temperature compensation coefficient.

6. The air conditioner of claim 1, wherein When determining the target indoor environment temperature according to the target suction temperature and the target discharge temperature, the controller is configured to: obtain a first indoor environment temperature and a second indoor environment temperature; bring the first indoor environment temperature, the second indoor environment temperature, and a preset first indoor temperature compensation coefficient into a first target indoor environment temperature calculation formula to obtain a first target indoor environment temperature, and take the first target indoor environment temperature as the target indoor environment temperature; bring the first indoor environment temperature, the second indoor environment temperature, the first indoor coil temperature, a preset second air temperature compensation coefficient, a preset third air temperature compensation coefficient, and a preset sixth coil temperature compensation coefficient into a second target indoor environment temperature calculation formula to obtain a second target indoor environment temperature, and take the second target indoor environment temperature as the target indoor environment temperature; bring the first indoor environment temperature, the second indoor environment temperature, the target discharge temperature, a preset fourth air temperature compensation coefficient, a preset fifth air temperature compensation coefficient, and a preset discharge temperature compensation coefficient into a third target indoor environment temperature calculation formula to obtain a third target indoor environment temperature, and take the third target indoor environment temperature as the target indoor environment temperature. 7.The air conditioner of claim 6, wherein The first target indoor environment temperature calculation formula comprises: Wherein, T air_c_1 is the first target indoor environment temperature, T air is the first indoor environment temperature, T air_1 is the second indoor environment temperature, is a preset first indoor temperature compensation coefficient; The second target indoor environment temperature calculation formula comprises: Wherein, T air_c_2 is the second target indoor environment temperature, T air is the first indoor environment temperature, T air_1 is the second indoor environment temperature, T incoil is the first indoor coil temperature, is a preset second air temperature compensation coefficient, is a preset third air temperature compensation coefficient, and c2 is a preset sixth coil temperature compensation coefficient. The third target indoor environment temperature calculation formula comprises: Wherein, T air_c_3 is the third target indoor environment temperature, T air is the first indoor environment temperature, T air_1 is the second indoor environment temperature, is the target exhaust temperature, is a preset fourth air temperature compensation coefficient, is a preset fifth air temperature compensation coefficient, and c3 is a preset exhaust temperature compensation coefficient.

8. The air conditioner of claim 7, wherein When determining the heat transfer coefficient of the air conditioner according to the rotational speed, the target operating frequency, and the target indoor environment temperature, the controller is configured to: when the air conditioner is in a cooling mode or a dehumidifying mode, bring the rotational speed, the target operating frequency, the first target indoor environment temperature, and the second target indoor environment temperature into a first heat transfer coefficient calculation formula to obtain a cooling mode heat transfer coefficient; when the air conditioner is in a heating mode, bring the rotational speed, the target operating frequency, the first target indoor environment temperature, and the third target indoor environment temperature into a second heat transfer coefficient calculation formula to obtain a heating mode heat transfer coefficient. 9.The air conditioner of claim 8, wherein The first heat transfer coefficient calculation formula includes: K cold = A K_1 *V a_1 +B K_1 *(T air_c_1 +C K_1 *T air_c_2 )+D K_1 *(Fre c ) b_2 , wherein, K cold is a refrigeration mode heat transfer coefficient, V a_1 is a rotating speed, Fre c is a target operating frequency, T air_c_1 is a first target indoor environment temperature, T air_c_2 is a second target indoor environment temperature, A K_1 is a preset first rotating speed compensation coefficient, B K_1 is a preset first target environment temperature compensation coefficient, C K_1 is a preset second target environment temperature compensation coefficient, and D K_1 is a preset first frequency compensation coefficient. The second heat transfer coefficient calculation formula includes: K heat = A K_2 *V a_2 +B K_2 *(T air_c_1 +C K_2 *T air_c_3 )+D K_2 *(Fre c ) b_2 , wherein K heat is a heating mode heat transfer coefficient, V a_2 is a rotating speed, Fre c is a target operating frequency, T air_c_1 is a first target indoor environment temperature, T air_c_3 is a third target indoor environment temperature, A K_2 is a preset second rotating speed compensation coefficient, B K_2 is a preset third target environment temperature compensation coefficient, C K_2 is a preset fourth target environment temperature compensation coefficient, and D K_2 is a preset second frequency compensation coefficient.

10. The air conditioner of claim 9, wherein When determining the cooling capacity or the heating capacity of the air conditioner in the current operating mode according to the heat transfer coefficient, the target indoor environment temperature, and the target indoor coil temperature, the controller is configured to: The refrigeration mode heat transfer coefficient, the first target indoor environment temperature, the second target indoor environment temperature, the first target indoor coil temperature, the second target indoor coil temperature, a preset refrigeration capacity compensation coefficient and a preset heat exchange area are brought into a refrigeration capacity calculation formula to determine the refrigeration capacity of the air conditioner. The heating mode heat transfer coefficient, the first target indoor environment temperature, the third target indoor environment temperature, the first target indoor coil temperature, the third target indoor coil temperature, a preset heating capacity compensation coefficient and a preset heat exchange area are brought into a heating capacity calculation formula to determine the heating capacity of the air conditioner.

11. The air conditioner of claim 10, wherein, The refrigeration capacity calculation formula comprises: Q cold = a cold *K cold *(T air_c_1 -T incoil_c_1 )*A+K cold *(T air_c_2 -T incoil_c_2 )*A+C Q_cold Wherein, Q cold is the refrigeration capacity, a cold is a preset first heat transfer compensation coefficient, K cold is the heat transfer coefficient in refrigeration mode, T air_c_1 is the first target indoor environment temperature, T air_c_2 is the second target indoor environment temperature, T incoil_c_1 is the first target indoor coil temperature, T incoil_c_2 is the second target indoor coil temperature, A is the preset heat exchange area, C Q_cold is the preset refrigeration capacity compensation coefficient; The heating capacity calculation formula comprises: Q heat = a heat *K heat *(T incoil_c_1 -T air_c_1 )+K heat *(T incoil_c_3 -T air_c_3 )*A+C Q_heat Wherein, Q heat is the heating capacity, a heat is a preset second heat transfer compensation coefficient, K heat is the heat transfer coefficient in heating mode, T air_c_1 is the first target indoor environment temperature, T air_c_3 is the third target indoor environment temperature, T incoil_c_1 is the first target indoor coil temperature, T incoil_c_3 is the third target indoor coil temperature, A is the preset heat exchange area, C Q_heat is the preset heating capacity compensation coefficient.

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