Air conditioner control method and air conditioner

Abstract

The invention provides an air conditioner control method and an air conditioner. The air conditioner control method comprises the steps that when the refrigerant amount in the air conditioner ranges from Mmin to Mmax, the operation frequency of a compressor of the air conditioner is set to be preset frequency f; after the air conditioner is started, the refrigerant amount M refrigerant in the air conditioner is obtained, and the size relation between the M refrigerant and the Mmin and the size relation between the M refrigerant and the Mmax are judged, so that a refrigerant amount judgment result is obtained; and according to the refrigerant amount judgment result, the preset frequency f is corrected to be f + delta f, so that the problem that in the prior art, too much or too little R290 refrigerant amount in an air conditioner can cause adverse effects on operation of a compressor is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular, to an air conditioner control method and an air conditioner. Background Art

[0002] For an air conditioner using R290 refrigerant (propane), during installation, the amount of R290 refrigerant charged may be abnormal due to the negligence or lack of experience of the operator, or the amount of R290 refrigerant charged may be insufficient due to leakage. Since R290 refrigerant is flammable and explosive, both excessive charging or leakage pose risks of explosion and fire.

[0003] Within a safe and reasonable range, when the amount of R290 refrigerant in the air conditioner is excessive, it will increase the load on the compressor, cause the liquid refrigerant in the evaporator not to evaporate completely, resulting in frosting or icing on the surface of the evaporator and affecting the heat exchange efficiency; when the amount of R290 refrigerant in the air conditioner is insufficient, it will lead to a weakened heat exchange effect and a decrease in the working efficiency of the compressor.

[0004] Therefore, both excessive or insufficient amounts of R290 refrigerant in the existing air conditioners will have an adverse impact on the operation of the compressor. Summary of the Invention

[0005] The main object of the present invention is to provide an air conditioner control method and an air conditioner to solve the problem that both excessive or insufficient amounts of R290 refrigerant in the existing air conditioners will have an adverse impact on the operation of the compressor.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided an air conditioner control method, including: setting the operating frequency of the compressor of the air conditioner to a preset frequency f when the amount of refrigerant in the air conditioner is within the range of M min to M max ; after the air conditioner is turned on, obtaining the amount of refrigerant M 冷媒 in the air conditioner, judging the magnitude relationship between M 冷媒 and M min and M max to obtain a refrigerant amount judgment result; and correcting the preset frequency f to f + Δf according to the refrigerant amount judgment result.

[0007] Further, the air conditioner control method includes: when M 冷媒 > M max , Δf is negative; and / or when M max ≥M 冷媒 ≥M min , controlling the operating state of the air conditioner to remain unchanged.

[0008] Further, the air conditioner control method includes: when M min > M 冷媒When, judge M min -M 冷媒 Is it greater than 50 g; where, when M min -M 冷媒 > 50 g, control the air conditioner to shut down and recharge the refrigerant; and / or when M min -M 冷媒 ≤ 50 g, Δf is a positive value.

[0009] Further, when performing the step of correcting the preset frequency f to f + Δf according to the refrigerant amount judgment result, the air conditioner control method includes: setting a first temperature range T1 and a second temperature range T2; where, T1 < T2; obtaining the temperature T of the corresponding outdoor environment 外环 , judge T 外环 The magnitude relationship with T1 and T2 to obtain a temperature judgment result; select the correction value Δf according to the temperature judgment result.

[0010] Further, when performing the step of selecting the correction value Δf according to the temperature judgment result, the air conditioner control method includes: when T 外环 < T1, the preset frequency f is f1, and the correction value Δf is Δf1; when T1 ≤ T 外环 ≤ T2, the preset frequency f is f2, and the correction value Δf is Δf2; when T 外环 > T2, the preset frequency f is f3, and the correction value Δf is Δf3; where, f1 < f2 < f3, Δf1 ≥ Δf2 ≥ Δf3.

[0011] Further, when performing the step of selecting the correction value Δf according to the temperature judgment result, the air conditioner control method further includes: when T 外环 < T1 and M 冷媒 > M max , Δf1 = [-1, 0); when T 外环 < T1 and M min > M 冷媒 , Δf1 = [2, 3]; and / or when T1 ≤ T 外环 ≤ T2 and M 冷媒 > M max , Δf2 = [-2, -1]; when T1 ≤ T 外环 ≤ T2 and M min > M 冷媒 , Δf2 = [1, 2]; and / or when T 外环 > T2 and M 冷媒 > M max , Δf3 = [-3, -2]; when T 外环 > T2 and M min > M 冷媒 , Δf3 = (0, 1].

[0012] Further, when the air conditioner operates in the cooling mode, T1 = [24°C, 27°C], and T2 = [32°C, 35°C]; when the air conditioner operates in the heating mode, T1 = [5°C, 8°C], and T2 = [18°C, 21°C].

[0013] Further, when performing the step of obtaining the refrigerant amount M in the air conditioner 冷媒 The air conditioner control method includes: obtaining the cooling / heating capacity Q of the air conditioner, with the unit of kW; obtaining the enthalpy difference Δh corresponding to the tube temperature before and after the change of the heat exchange tubes of the indoor heat exchanger of the air conditioner 管温 , with the unit of kJ / kg; calculating the refrigerant amount M according to the following formula 冷媒 :

[0014] Further, when performing the step of obtaining the enthalpy difference Δh corresponding to the tube temperature before and after the change of the heat exchange tubes of the indoor heat exchanger, the air conditioner control method includes: obtaining and storing the tube temperature data of the heat exchange tubes of the indoor heat exchanger when the air conditioner is operating, with the unit of °C; comparing the tube temperature data T 管 ' at the current moment with the tube temperature data T 管 before the first predetermined time period every first predetermined time period; when T 管 ' ≠ T 管 , calculating the enthalpy difference Δh according to the following formula 管温 : Δh 管温 = C p |T 管 - T 管 ′|; where C p is the specific heat capacity at constant pressure of air. In the above formula, C p = 1.005 kJ / kg·°C.

[0015] Further, when performing the step of obtaining the cooling / heating capacity Q of the air conditioner, the air conditioner control method includes: obtaining the temperature T in at the air inlet of the air conditioner and the temperature T out at the air outlet; calculating the inlet and outlet temperature enthalpy difference Δh at the air inlet and outlet, with the unit of kJ / kg: Δh = C p |T in - T out |; where C p is the specific heat capacity at constant pressure of air. In the above formula, C p = 1.005 kJ / kg·°C; obtaining the air supply volume S 风量 of the air conditioner, with the unit of m 3 / h; calculating the cooling / heating capacity Q according to the following formula: Q = ρ × S 风量×Δh; where ρ is the air density, ρ = 1.225 kg / m 3 .

[0016] Further, when performing the step of obtaining the air supply volume S of the air conditioner 风量 , the air conditioner control method includes: obtaining the rotation speed r of the indoor fan of the air conditioner, with the unit of rpm; using the fitting relationship curve graph between the rotation speed of the indoor fan and the air supply volume, obtaining the air supply volume S of the air conditioner corresponding to the rotation speed r of the indoor fan 风量 .

[0017] Further, when performing the step of obtaining the cooling / heating capacity Q of the air conditioner, the air conditioner control method includes: obtaining the volume V of the room where the air conditioner is located, with the unit of m 3 , and obtaining the air density ρ = 1.225 kg / m 3 ; calculating the mass flow rate M of the air in the room, with the unit of kg / s, according to the following formula: M = ρ×V; obtaining the room temperature data of the temperature change in the room where the air conditioner is located, with the unit of °C; calculating the difference Δt between the room temperature data at the current moment and the room temperature data before the second predetermined time period every second predetermined time period, and determining whether Δt is 0°C; when Δt ≠ 0°C, obtaining the cold / heat quantity A leaked in the room, with the unit of kW; calculating the cooling / heating capacity Q according to the following formula: Q = C p MΔt + A; where C p is the specific heat capacity at constant pressure of the air. In the above formula, C p = 1.005 kJ / kg·°C.

[0018] Further, when the room only dissipates heat through convective heat transfer and heat conduction, then A = k1A1Δt1 + k2A2Δt2; where k1 is the convective heat transfer coefficient, A1 is the convective heat transfer area, Δt1 is the convective heat transfer temperature difference, k2 is the heat conduction heat transfer coefficient, A2 is the heat conduction heat transfer area, and Δt2 is the heat conduction heat transfer temperature difference.

[0019] According to another aspect of the present invention, there is provided an air conditioner applicable to the above air conditioner control method. The air conditioner includes: an air conditioner body, the air conditioner body includes a housing and an indoor heat exchanger provided in the housing; a heat exchanger temperature detection component, the heat exchanger temperature detection component is provided on the heat exchange tube of the indoor heat exchanger to detect the tube temperature of the heat exchange tube.

[0020] Further, the air conditioner further includes: an inlet air temperature detection component and an outlet air temperature detection component. The housing includes an air inlet and an air outlet. The inlet air temperature detection component and the outlet air temperature detection component are respectively provided at the air inlet and the air outlet; and / or an indoor temperature detection component, the indoor temperature detection component is placed in the room where the air conditioner is located or installed outside the housing to detect the temperature in the room.

[0021] Applying the technical solution of the present invention, the air conditioner control method of the present invention includes: setting the operating frequency of the compressor in the air conditioner to the preset frequency f when the refrigerant amount in the air conditioner is within the range of M min to M max ; after the air conditioner is turned on, obtaining the refrigerant amount M 冷媒 in the air conditioner, and judging the magnitude relationship between M 冷媒 and M min and M max to obtain a refrigerant amount judgment result; and correcting the preset frequency f to f + Δf according to the refrigerant amount judgment result. In this way, the air conditioner control method of the present invention dynamically adjusts the operating frequency of the compressor by comparing the refrigerant amount M 冷媒 in the air conditioner with the preset range between M min and M max , which can effectively cope with the fluctuations in the working efficiency of the air conditioner caused by the change of the refrigerant amount, solves the problem that too much or too little R290 refrigerant amount in the air conditioner in the prior art will have an adverse impact on the operation of the compressor, ensures that the air conditioner can maintain the best operating state under different refrigerant amounts, and improves the energy efficiency ratio and comfort of the air conditioner. At the same time, through accurate refrigerant amount judgment, the air conditioner failure caused by excessive or insufficient refrigerant amount is avoided, and the service life of the air conditioner is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 shows a sequential flowchart of an embodiment of the air conditioner control method according to the present invention;

[0024] Figure 2 shows Figure 1 the control flowchart of the embodiment of the air conditioner control method shown;

[0025] Figure 3 shows Figure 2 the flowchart of the first embodiment of the calculation of the refrigerant amount in the air conditioner control method shown;

[0026] Figure 4 shows Figure 2 the flowchart of the second embodiment of the calculation of the refrigerant amount in the air conditioner control method shown;

[0027] Figure 5 shows Figure 2 the fitting relationship curve graph between the rotational speed of the internal fan of the air conditioner and the air supply volume adopted in the air conditioner control method shown. Detailed implementation manners

[0028] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] As Figures 1 to 4 shown, the present invention provides an air conditioner control method, including: setting the operating frequency of the compressor of the air conditioner to a preset frequency f when the refrigerant amount in the air conditioner is within the range of M min to M max ; after the air conditioner is turned on, obtaining the refrigerant amount M 冷媒 in the air conditioner, judging the magnitude relationship between M 冷媒 and M min and M max to obtain a refrigerant amount judgment result; and correcting the preset frequency f to f + Δf according to the refrigerant amount judgment result.

[0030] In this way, the air conditioner control method of the present invention dynamically adjusts the operating frequency of the compressor by comparing the refrigerant amount M 冷媒 in the air conditioner with the preset range of M min to M max , which can effectively cope with the fluctuations in the working efficiency of the air conditioner caused by changes in the refrigerant amount, solves the problem that too much or too little R290 refrigerant amount in the air conditioner in the prior art will have an adverse impact on the operation of the compressor, ensures that the air conditioner can maintain the best operating state under different refrigerant amounts, improves the energy efficiency ratio and comfort of the air conditioner. At the same time, through accurate refrigerant amount judgment, the air conditioner failure caused by excessive or insufficient refrigerant amount is avoided, and the service life of the air conditioner is extended.

[0031] Specifically, the range of M min to M max is the refrigerant amount filling range of the air conditioner in the standard safety specification, and the refrigerant amount filling ranges of different refrigerants in different models of air conditioners will be different; the preset frequency f refers to the operating frequency of the compressor preset to achieve the set cooling or heating effect within the refrigerant amount filling range.

[0032] As Figure 2 shown, the air conditioner control method includes: when M 冷媒 > M max , Δf is negative; and / or when M max ≥M 冷媒 ≥M min , controlling the operating state of the air conditioner to remain unchanged.

[0033] The above steps are based on the influence of the refrigerant quantity on the pressure of the air conditioner. When the refrigerant quantity is excessive, the pressure of the air conditioner will increase. Reducing the operating frequency of the compressor can reduce the refrigerant circulation speed, thereby reducing the air conditioner pressure, preventing the air conditioner from being overloaded, and ensuring the safe operation of the air conditioner. On the contrary, when the refrigerant quantity is within the allowable range, maintaining the original operating state can ensure the efficient operation of the air conditioner and avoid unnecessary energy loss. The air conditioner control method of the present invention can dynamically adjust the operating frequency of the compressor, respond to changes in the refrigerant quantity in real time, optimize system performance, and extend the equipment life.

[0034] As Figure 2 shown, the air conditioner control method includes: when M min > M 冷媒 , it is judged whether M min - M 冷媒 is greater than 50 g; wherein, when M min - M 冷媒 > 50 g, the air conditioner is controlled to shut down and the refrigerant is recharged; and / or when M min - M 冷 refrigerant ≤ 50 g, Δf is a positive value.

[0035] The above settings consider the influence of insufficient refrigerant quantity on the refrigeration / heating effect of the air conditioner. When the refrigerant quantity is severely insufficient, the air conditioner cannot work properly and must be shut down and the refrigerant must be replenished; in the case of slightly insufficient refrigerant quantity, the operating frequency of the compressor can be increased to increase the refrigerant circulation speed, compensate for the influence caused by insufficient refrigerant quantity, and ensure that the air conditioner can continue to operate stably. In practical applications, through this intelligent judgment and adjustment mechanism in the air conditioner control method of the present invention, the problem of low refrigeration / heating efficiency caused by insufficient refrigerant quantity can be effectively prevented, and the user experience can be improved.

[0036] When M 冷媒 > M max , it means that the refrigerant quantity in the air conditioner is excessive. In order to protect the compressor and maintain the working efficiency of the air conditioner, it is necessary to reduce the operating frequency of the compressor and then make the air conditioner run until it shuts down manually;

[0037] When M max ≥ M 冷媒 ≥ M min , it indicates that the refrigerant quantity is within the air conditioner filling quantity range in the standard safety specification, and the air conditioner can continue to maintain the operating state;

[0038] When M min > M 冷媒 , then continue to judge the magnitude relationship between M min and M 冷媒 ;

[0039] When M min-M 冷 When the refrigerant amount M ≤ 50g, it indicates that the refrigerant amount in the air conditioner is slightly insufficient, but it can still maintain operation. To maintain the output capacity of the air conditioner, it is necessary to increase the operating frequency of the compressor and then let the air conditioner run until it is manually shut down.

[0040] When M min -M 冷媒 >50g, it indicates that the refrigerant amount in the air conditioner is seriously insufficient and cannot maintain the operation of the air conditioner. It is necessary to control the air conditioner to shut down and recharge the refrigerant.

[0041] As Figure 2 shown, when performing the step of correcting the preset frequency f to f + Δf according to the refrigerant amount judgment result, the air conditioner control method includes: setting a first temperature range T1 and a second temperature range T2; where T1 < T2; obtaining the temperature T of the corresponding outdoor environment 外环 , judging the magnitude relationship between T 外环 and T1 and T2 to obtain a temperature judgment result; and selecting the correction value Δf according to the temperature judgment result.

[0042] The above-mentioned first temperature range T1 and second temperature range T2 are set according to different operating modes (such as cooling or heating) and environmental conditions, and are used to distinguish different operating conditions.

[0043] The air conditioner control method of the present invention can obtain the temperature T of the corresponding outdoor environment 外环 , judge the magnitude relationship between T 外环 and T1 and T2 to obtain a temperature judgment result, and select the correction value Δf according to the temperature judgment result. This strategy takes into account the influence of the environmental temperature on the working performance of the air conditioner, and adjusts the operating frequency of the compressor to adapt to different outdoor temperature conditions, ensuring the best cooling / heating effect in various environments. Including but not limited to in extreme weather conditions, by flexibly adjusting the operating frequency of the compressor, the adverse effects of the environmental temperature on the working performance of the air conditioner can be overcome, and the stable operation of the air conditioner can be maintained.

[0044] Furthermore, when performing the step of selecting the correction value Δf according to the temperature judgment result, the air conditioner control method includes: when T 外环 <T1, the preset frequency f is f1, and the correction value Δf is Δf1; when T1 ≤ T 外环 ≤T2, the preset frequency f is f2, and the correction value Δf is Δf2; when T 外环 >T2, the preset frequency f is f3, and the correction value Δf is Δf3; where f1 < f2 < f3, and Δf1 ≥ Δf2 ≥ Δf3.

[0045] Specifically, as shown in Table 1 below, the preset frequency f and the correction value Δf have different set values at different outdoor environmental temperatures:

[0046]

[0047] Specifically, when performing the step of selecting the correction value Δf according to the temperature determination result, the air conditioner control method further includes: when T 外环 <T1 and M 冷媒 >M max , Δf1 = [-1, 0); when T 外环 <T1 and M min >M 冷媒 , Δf1 = [2, 3]; and / or when T1 ≤ T 外环 ≤T2 and M 冷媒 >M max , Δf2 = [-2, -1]; when T1 ≤ T 外环 ≤T2 and M min >M 冷媒 , Δf2 = [1, 2]; and / or when T 外环 >T2 and M 冷媒 >M max , Δf3 = [-3, -2]; when T 外环 >T2 and M min >M 冷媒 , Δf3 = (0, 1]. In this way, when the refrigerant amount is abnormal, by correcting the operating frequency of the compressor, the fluctuation of the indoor environmental temperature can be reduced, making the indoor environment more comfortable and economical.

[0048] (1) When T 外环 is less than T1, when the refrigerant amount is normal, the operating frequency f of the compressor takes f1, when the refrigerant amount is abnormal, the correction value Δf of the operating frequency of the compressor takes Δf1, and when the refrigerant amount is abnormal, the operating frequency of the compressor is f1 + Δf1. When it is detected that the refrigerant amount is excessive, the correction value Δf1 takes [-1, 0); when it is detected that the refrigerant amount is insufficient, the correction value Δf1 takes [2, 3].

[0049] (2) When T 外环 is greater than or equal to T1 and less than or equal to T2, when the refrigerant amount is normal, the operating frequency f of the compressor takes f2, when the refrigerant amount is abnormal, the correction value Δf of the operating frequency of the compressor takes Δf2, and when the refrigerant amount is abnormal, the operating frequency of the compressor is f2 + Δf2. When it is detected that the refrigerant amount is excessive, the correction value Δf2 takes [-2, -1]; when it is detected that the refrigerant amount is insufficient, the correction value Δf2 takes [1, 2].

[0050] (3) When T 外环When the temperature is greater than T2 and the refrigerant amount is normal, the operating frequency f of the compressor is f3. When the refrigerant amount is abnormal, the correction value Δf of the operating frequency of the compressor is Δf3, and the operating frequency of the compressor when the refrigerant amount is abnormal is f3 + Δf3. When it is detected that the refrigerant amount is excessive, the correction value Δf3 is taken from [-3, -2]; when it is detected that the refrigerant amount is insufficient, the correction value Δf3 is taken from (0, 1].

[0051] The above setting values are obtained based on a large amount of experimental data and theoretical analysis, aiming to provide the most suitable operating frequency adjustment strategy for the compressor according to the ambient temperature changes in different modes. By adjusting these temperature thresholds, the air conditioner can better adapt to specific environmental conditions and optimize the operating efficiency.

[0052] Specifically, when the air conditioner operates in the cooling mode, T1 = [24°C, 27°C], T2 = [32°C, 35°C]; when the air conditioner operates in the heating mode, T1 = [5°C, 8°C], T2 = [18°C, 21°C].

[0053] As Figure 3 and Figure 4 shown, when performing the step of obtaining the refrigerant amount M in the air conditioner 冷媒 , the air conditioner control method includes: obtaining the cooling / heating capacity Q of the air conditioner, with the unit of kW; obtaining the enthalpy difference Δh corresponding to the tube temperature before and after the change of the heat exchange tubes of the indoor heat exchanger of the air conditioner 管温 , with the unit of kJ / kg; calculating the refrigerant amount M according to the following formula 冷媒 :[[]]

[0054]

[0055] The above calculation method is based on the principle of energy conservation. By measuring the cooling / heating capacity Q of the air conditioner and the enthalpy difference Δh corresponding to the tube temperature before and after the change of the heat exchange tubes of the indoor heat exchanger 管温 , the refrigerant amount in the air conditioner can be calculated, providing data support for the dynamic adjustment of the operating frequency of the compressor in the air conditioner.

[0056] As Figure 3 and Figure 4 shown, when performing the step of obtaining the enthalpy difference Δh corresponding to the tube temperature before and after the change of the heat exchange tubes of the indoor heat exchanger, the air conditioner control method includes: obtaining and storing the tube temperature data of the heat exchange tubes of the indoor heat exchanger of the air conditioner during operation, with the unit of °C; comparing the tube temperature data T 管 ' at the current moment with the tube temperature data T 管 before the first predetermined time period every first predetermined time period; when T 管 ' ≠ T 管 , calculating the enthalpy difference Δh according to the following formula 管温 :[[]]

[0057] Δh 管温 = C p |T 管 - T 管 '|;

[0058] where C p is the specific heat capacity at constant pressure of air. In the above formula, C p = 1.005 kJ / kg·°C.

[0059] Specifically, a heat exchanger temperature detection component (such as a thermocouple) is arranged on the indoor heat exchanger. By monitoring the temperature change of the heat exchange tubes of the indoor heat exchanger in real time and calculating the corresponding tube temperature enthalpy difference, the refrigerant circulation state and the working efficiency of the air conditioner can be reflected in a timely manner, providing key parameters for the calculation of the refrigerant amount M 冷媒 in the subsequent air conditioner.

[0060] The air conditioner control method of the present invention can adjust the cooling / heating capacity Q of the air conditioner in two ways:

[0061] (1) By arranging thermocouples to monitor the temperatures at the air inlet and outlet of the air conditioner, and using the fitting relationship curve between the rotational speed of the internal fan and the air supply volume to obtain the air supply volume of the air conditioner, and then obtaining the cooling / heating capacity Q of the air conditioner.

[0062] (2) By calculating the cooling / heating capacity Q of the air conditioner through the difference in the temperature change in the room where the air conditioner is located and the cold / heat leakage in the room.

[0063] As Figure 3 shown, an air inlet temperature detection component (such as a thermocouple) is arranged at the air inlet and outlet of the air conditioner respectively to monitor and record the temperature T in at the air inlet and the temperature T out at the air outlet. At the same time, monitor and record the rotational speed of the internal fan of the air conditioner. Let the rotational speed of the internal fan be r. Using the fitting relationship between the rotational speed of the internal fan and the air supply volume, the air supply volume of the air conditioner is obtained (it should be noted that different models of air conditioners have corresponding fitting relationships between the rotational speed of the internal fan and the air supply volume). Through the temperature T in at the air inlet and the temperature T out at the air outlet of the air conditioner and the air supply volume S 风量 of the air conditioner, the cooling / heating capacity Q can be calculated; the specific situation is as follows:

[0064] As Figure 3 shown, when performing the step of obtaining the cooling / heating capacity Q of the air conditioner, the air conditioner control method includes: obtaining the temperature T in at the air inlet and the temperature T out; Calculate the temperature enthalpy difference Δh at the air inlet and outlet according to the following formula, with the unit of kJ / kg:

[0065] Δh = C p |T in -T out |;

[0066] Among them, C p is the specific heat capacity at constant pressure of air. In the above formula, C p = 1.005 kJ / kg·°C; Obtain the air supply volume S 风量 of the air conditioner, with the unit of m 3 / h;

[0067] And calculate the cooling / heating capacity Q according to the following formula:

[0068] Q = ρ × S 风量 × Δh;

[0069] Among them, ρ is the air density, ρ = 1.225 kg / m 3 .

[0070] The above calculation is based on the thermodynamic principle. Through the temperature T in at the air inlet of the air conditioner and the temperature T out at the air outlet and the air supply volume S 风量 of the air conditioner, the cooling / heating capacity Q of the air conditioner can be quantified, providing direct performance feedback for the calculation of the refrigerant quantity.

[0071] As Figure 3 shown, when performing the step of obtaining the air supply volume S 风量 of the air conditioner, the air conditioner control method includes: obtaining the rotation speed r of the internal fan of the air conditioner, with the unit of rpm; using the fitting relationship curve graph between the rotation speed of the internal fan and the air supply volume, obtaining the air supply volume S 风量 of the air conditioner corresponding to the rotation speed r of the internal fan.

[0072] The steps of the above air conditioner control method consider the influence of the rotation speed of the internal fan of the air conditioner on the air supply volume. By establishing a mathematical model between the two, the air volume change at different rotation speeds can be predicted, providing accurate air volume data for the calculation of the cooling / heating capacity Q of the air conditioner.

[0073] As Figure 5 shown is the fitting relationship curve graph between the rotation speed of the internal fan of the air conditioner and the air supply volume adopted in the air conditioner control method of the present invention. One rotation speed of the internal fan only corresponds to one air supply volume, and the rotation speed of the internal fan is proportional to the air supply volume. The higher the rotation speed of the internal fan, the greater the air supply volume of the air conditioner.

[0074] For example, the fitting formula between the rotational speed of the internal fan and the air supply volume can be S air supply = a × r × b, where S air supply is the air supply volume, in m 3 / s, r is the rotational speed of the internal fan, in rpm, a is the proportionality coefficient, and b is the exponential constant.

[0075] The proportionality coefficient a and the exponential constant b of the above fitting formula can be determined as follows: when the rotational speed of the internal fan is r1 = 700 rpm, the air supply volume of the air conditioner at this time is S1 = 580.4 m 3 / s, when the rotational speed of the internal fan is r2 = 830 rpm, the air supply volume of the air conditioner at this time is S2 = 816.16 m 3 / s, when the rotational speed of the internal fan is r3 = 970 rpm, the air supply volume of the air conditioner at this time is S3 = 1070.07 m 3 / s. From this, a = 0.00491 and b = 1.78804 are obtained. Therefore, S = 0.00491 × r × 1.78804. After calculating the fitting formula, the fitting formula is preset in the control system of the air conditioner.

[0076] As Figure 4 shown, place an indoor temperature detection component (such as a thermometer) in the room to detect the tube temperature T of the heat exchange tube of the indoor heat exchanger 管 , the indoor temperature T room and the indoor volume V. Through the temperature change difference Δt of the air conditioner in the room and the cold / heat quantity A leaked indoors, the refrigeration / heating capacity Q can be calculated; the specific situation is as follows:

[0077] As Figure 4 shown, when performing the step of obtaining the refrigeration / heating capacity Q in the air conditioner, the air conditioner control method includes: obtaining the volume V of the room where the air conditioner is located, in m 3 , and obtaining the air density ρ = 1.225 kg / m 3 ; calculate the indoor air mass flow rate M, in kg / s, according to the following formula:

[0078] M = ρ × V;

[0079] Obtain the room temperature data of the temperature change in the room where the air conditioner is located, in °C; every second predetermined time period, calculate the difference Δt between the room temperature data at the current moment and the room temperature data before the second predetermined time period, and determine whether Δt is 0 °C; when Δt ≠ 0 °C, obtain the cold / heat quantity A leaked indoors, in kW; calculate the refrigeration / heating capacity Q according to the following formula:

[0080] Q = C p MΔt + A;

[0081] where C pis the specific heat capacity at constant pressure of air. In the above formula, C p = 1.005 kJ / kg·°C.

[0082] The above calculation method is based on the principles of energy conservation and heat balance. By monitoring the temperature change difference Δt in the room and the situation of the cold / heat quantity A leaked indoors, the refrigeration / heating capacity Q of the air conditioner can be evaluated, providing an objective basis for the calculation of the refrigerant quantity in the air conditioner control method of the present invention.

[0083] As Figure 4 shown, when the indoor heat dissipation only occurs through convective heat transfer and heat conduction, then A = k1A1Δt1 + k2A2Δt2; where k1 is the convective heat transfer coefficient, A1 is the convective heat transfer area, Δt1 is the convective heat transfer temperature difference, k2 is the heat conduction heat transfer coefficient, A2 is the heat conduction heat transfer area, and Δt2 is the heat conduction heat transfer temperature difference.

[0084] Here, the main ways of indoor heat exchange are considered. By calculating the cold / heat quantity A leaked indoors through convective heat transfer and heat conduction heat dissipation, the refrigeration / heating capacity Q of the air conditioner can be evaluated more accurately. Especially in a closed or semi-closed space, the changes of these parameters have a direct impact on the working effect of the air conditioner.

[0085] The air conditioner control method of the present invention includes two calculation methods for the refrigerant quantity. One is to calculate the refrigeration / heating capacity through the air supply volume of the air conditioner and the temperature drop / rise generated indoors, record and store the tube temperature data of the heat exchange tubes of the indoor heat exchanger, calculate the enthalpy difference of the refrigerant change through the change of the front and rear tube temperatures, and then calculate the refrigerant quantity, and compare it with the charging range (M min to M max ) of the refrigerant quantity of the floor-standing air conditioner in the standard safety specification to judge whether the refrigerant quantity is abnormal. Finally, within a safe and reasonable range, the operating frequency of the compressor is corrected by dividing the outdoor environmental temperature into intervals, so that the compressor frequency increases or decreases, reducing the large fluctuations in the indoor environmental temperature, enabling the indoor temperature to be maintained within a comfortable range, making the indoor environment more comfortable and economical, solving the problem that the excessive or insufficient refrigerant quantity in the air conditioner cannot be accurately detected, and providing a control strategy for frequency modulation of the compressor according to the excessive or insufficient refrigerant quantity.

[0086] The present invention also provides an air conditioner applicable to the above air conditioner control method. The air conditioner includes: an air conditioner body, the air conditioner body includes a housing and an indoor heat exchanger disposed in the housing; a heat exchanger temperature detection component, the heat exchanger temperature detection component is disposed on the heat exchange tubes of the indoor heat exchanger to detect the tube temperature of the heat exchange tubes.

[0087] In this way, by adding a heat exchanger temperature detection component, the air conditioner of the present invention can monitor the temperature of the heat exchange tubes of the indoor heat exchanger in real time, promptly detect abnormal refrigerant circulation, take corresponding measures, provide accurate data support for the implementation of the air conditioner control method, avoid air conditioner failures, and extend the service life of the air conditioner.

[0088] The air conditioner of the present invention further includes: an inlet air temperature detection component and an outlet air temperature detection component. The housing includes an air inlet and an air outlet, and the inlet air temperature detection component and the outlet air temperature detection component are respectively arranged at the air inlet and the air outlet; and / or an indoor temperature detection component, which is placed indoors where the air conditioner is located or installed outside the housing to detect the indoor temperature.

[0089] The above-mentioned inlet air temperature detection component and outlet air temperature detection component are used to collect the inlet and outlet air temperature data during the operation of the air conditioner, can be used in some calculation steps of the air conditioner control method of the present invention, and can comprehensively understand the operation state of the air conditioner, providing richer data information for the adjustment of the operation frequency of the compressor.

[0090] In summary, the air conditioner control method and the air conditioner settings proposed by the present invention can dynamically adjust the operation frequency of the compressor by combining the precise monitoring of the refrigerant amount and the ambient temperature. It not only effectively responds to the changes in the working efficiency of the compressor and the efficiency fluctuations of the air conditioner caused by the change in the refrigerant amount, ensures that the air conditioner can maintain the best operation state under different working conditions, improves the energy efficiency ratio and comfort of the air conditioner, but also realizes the real-time monitoring of the temperature of the indoor and key parts of the air conditioner by adding multiple temperature detection components, provides accurate data support for the implementation of the air conditioner control method, further improves the intelligent level and user experience of the air conditioner, solves the problem that too much or too little R290 refrigerant in the air conditioner in the prior art will have an adverse impact on the operation of the compressor, and also solves the problems of unstable operation and low efficiency of the air conditioner in the prior art caused by abnormal refrigerant amount and ambient temperature changes, opening up a new direction for the development of future air conditioning technology.

[0091] First of all, it should be noted that most air conditioners, including the air conditioner of the present invention, have an indoor unit and an outdoor unit. An indoor heat exchanger, an indoor fan, etc. are provided in the indoor unit, and a compressor, an electronic expansion valve, an outdoor fan, an outdoor heat exchanger, etc. are provided in the outdoor unit. A control system for controlling the operation of the air conditioner is usually also provided in the indoor unit. For example, the control system includes a control module, a judgment module, a calculation module, a collection module, etc. Among them, the physical forms of the control module, the judgment module, the calculation module, and the collection module can be independent of each other. Of course, they can also be functional units integrated on a physical module. For example, the control system of the air conditioner includes a memory and a processor, as well as a computer program stored in the memory and executable on the processor. This computer program can complete the functions of the above-mentioned control module, judgment module, and collection module. The above physical settings of these air conditioners are all conventional setting methods of air conditioners in the prior art and should not be regarded as a limitation to the air conditioner control method and air conditioner of the present invention.

[0092] When the air conditioner of the present invention is a floor-standing air conditioner and the refrigerant therein is R290 refrigerant, if the safe range of the refrigerant charge in the air conditioner is 380 grams to 580 grams (that is, Mmin to Mmax is 380 grams to 580 grams), due to the negligence or lack of experience of the installer, the refrigerant amount in the air conditioner may be abnormal. The two calculation methods provided by the present invention can be used to calculate the refrigerant amount in the current air conditioner and determine whether it is less than 380 grams or greater than 580 grams. Here, taking the air conditioner operating in the cooling mode in summer as an example, the specific implementation manner of the present invention is as follows:

[0093] (1) When the detected temperature T of the corresponding outdoor environment 外环 is less than T1 (i.e., 24°C to 27°C), the first operating frequency f1 of the compressor when the refrigerant amount is normal is 35 Hz. When it is determined that the refrigerant amount in the air conditioner is abnormal, the operating frequency of the compressor needs to be corrected.

[0094] When the refrigerant amount is excessive, that is, greater than 580 grams, it will cause the tube temperature of the heat exchange tubes of the indoor heat exchanger in the air conditioner at this time to be relatively low, that is, the air outlet temperature sent to the room where the air conditioner is located is relatively low. In order to maintain the stability of the indoor temperature and reduce the discomfort caused by the indoor temperature fluctuation, the first operating frequency f1 of the compressor needs to be reduced, that is, corrected. In this way, since the first operating frequency f1 of the compressor is reduced, the tube temperature of the heat exchange tubes of the indoor heat exchanger will increase. At this time, since the temperature of the outdoor environment is not very high in summer, the compressor can be slightly frequency-reduced, and its first correction value Δf1 is taken as [-1, 0), and the corrected operating frequency of the compressor is [34, 35) Hz.

[0095] When the refrigerant amount is less than 380 grams and greater than or equal to 330 grams, the tube temperature of the heat exchange tubes of the indoor heat exchanger at this time will be relatively high, that is, the air outlet temperature sent to the room where the air conditioner is located is relatively high. In order to maintain the stability of the indoor temperature and reduce the discomfort caused by indoor temperature fluctuations, it is necessary to correct it by increasing the first operating frequency f1 of the compressor. In this way, as the operating frequency of the compressor increases, the tube temperature of the heat exchange tubes of the indoor heat exchanger will decrease. At this time, the first correction value Δf1 is taken from [2, 3], and the operating frequency of the corrected compressor is [37, 38] Hz;

[0096] If the refrigerant amount is less than 330 grams, it is necessary to control the air conditioner to shut down and recharge the refrigerant.

[0097] (2) When the temperature T of the corresponding outdoor environment is detected 外环 greater than T1 and less than T2, that is, between 27°C and 32°C, the second operating frequency f2 of the compressor when the refrigerant amount is normal is 55 Hz. When it is determined that the refrigerant amount in the air conditioner is abnormal, the operating frequency of the compressor needs to be corrected.

[0098] When the refrigerant amount is too much, that is, greater than 580 grams, the tube temperature of the heat exchange tubes of the indoor heat exchanger in the air conditioner at this time will be relatively low, that is, the air outlet temperature sent to the room where the air conditioner is located is relatively low. In order to maintain the stability of the indoor temperature and reduce the discomfort caused by indoor temperature fluctuations, it is necessary to reduce the second operating frequency f2 of the compressor, that is, to correct it. In this way, since the second operating frequency f2 of the compressor decreases, the tube temperature of the heat exchange tubes of the indoor heat exchanger will increase; at this time, since the temperature of the outdoor environment is not very high in summer, the compressor can be slightly frequency-reduced, and the second correction value Δf2 is taken from [-2, -1], and the operating frequency of the corrected compressor is [53, 54] Hz.

[0099] When the refrigerant amount is less than 380 grams and greater than or equal to 330 grams, the tube temperature of the heat exchange tubes of the indoor heat exchanger at this time will be relatively high, that is, the air outlet temperature sent to the room where the air conditioner is located is relatively high. In order to maintain the stability of the indoor temperature and reduce the discomfort caused by indoor temperature fluctuations, it is necessary to correct it by increasing the second operating frequency f2 of the compressor. In this way, as the operating frequency of the compressor increases, the tube temperature of the heat exchange tubes of the indoor heat exchanger will decrease. At this time, the second correction value Δf2 is taken from [1, 2], and the operating frequency of the corrected compressor is [56, 57] Hz.

[0100] If the refrigerant amount is less than 330 grams, it is necessary to control the air conditioner to shut down and recharge the refrigerant.

[0101] (3) When the temperature T of the corresponding outdoor environment is detected 外环When the temperature is greater than T2 (i.e., 32°C to 35°C), the second operating frequency f3 of the compressor with normal refrigerant amount is 75 Hz. When it is determined that the refrigerant amount in the air conditioner is abnormal, the operating frequency of the compressor needs to be corrected.

[0102] When the refrigerant amount is excessive, i.e., greater than 580 grams, it will cause the tube temperature of the heat exchange tubes of the indoor heat exchanger in the air conditioner at this time to be relatively low, that is, the air outlet temperature sent to the room where the air conditioner is located is relatively low. In order to maintain the stability of the indoor temperature and reduce the discomfort caused by the indoor temperature fluctuation, it is necessary to reduce the third operating frequency f3 of the compressor, that is, correct it. In this way, since the third operating frequency f3 of the compressor is reduced, the tube temperature of the heat exchange tubes of the indoor heat exchanger will increase; at this time, since the outdoor ambient temperature is not very high in summer, it is sufficient to slightly reduce the frequency of the compressor, and its third correction value Δf3 takes [-3, -2], and the operating frequency of the corrected compressor is [72, 73] Hz.

[0103] When the refrigerant amount is less than 380 grams and greater than or equal to 330 grams, it will cause the tube temperature of the heat exchange tubes of the indoor heat exchanger at this time to be relatively high, that is, the air outlet temperature sent to the room where the air conditioner is located is relatively high. In order to maintain the stability of the indoor temperature and reduce the discomfort caused by the indoor temperature fluctuation, it is necessary to correct it by increasing the third operating frequency f3 of the compressor. In this way, when the operating frequency of the compressor increases, the tube temperature of the heat exchange tubes of the indoor heat exchanger will decrease. At this time, the third correction value Δf3 takes [0, 1], and the operating frequency of the corrected compressor is (75, 76] Hz.

[0104] If the refrigerant amount is less than 330 grams, it is necessary to control the air conditioner to shut down and recharge the refrigerant.

[0105] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0106] The air conditioner control method of the present invention includes: setting the operating frequency of the compressor of the air conditioner to a preset frequency f when the refrigerant amount in the air conditioner is within the range of M min to M max ; after the air conditioner is turned on, obtaining the refrigerant amount M 冷媒 in the air conditioner, and judging the size relationship between M 冷媒 and M min and M max to obtain a refrigerant amount judgment result; correcting the preset frequency f to f + Δf according to the refrigerant amount judgment result. In this way, the air conditioner control method of the present invention compares the refrigerant amount M 冷媒 in the air conditioner with the pre-set M min to M maxDynamically adjust the operating frequency of the compressor according to the size within a range, which can effectively cope with the fluctuations in the working efficiency of the air conditioner caused by the change in the refrigerant volume, solve the problem in the prior art that too much or too little R290 refrigerant volume in the air conditioner will have an adverse impact on the operation of the compressor, ensure that the air conditioner can maintain the best operating state under different refrigerant volumes, and improve the energy efficiency ratio and comfort of the air conditioner. At the same time, through accurate refrigerant volume judgment, the air conditioner failure caused by excessive or insufficient refrigerant volume is avoided, and the service life of the air conditioner is extended.

[0107] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0108] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0109] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present application; the orientation words "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0110] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0111] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without further statement, the above terms have no special meaning, and thus should not be construed as limiting the protection scope of the present application.

[0112] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air conditioner control method, characterized in that, including: When the refrigerant amount in the air conditioner is within M min to M max the operating frequency of the compressor of the air conditioner is set to the preset frequency f; After the air conditioner is turned on, obtain the refrigerant amount M in the air conditioner 冷媒 , and judge M 冷媒 and M min and M max to obtain the refrigerant amount judgment result; correcting the preset frequency f to f + Δf according to the refrigerant amount judgment result.

2. The air conditioner control method according to claim 1, wherein The air conditioner control method includes: When M 冷媒 > M max , the Δf is negative; and / or When M max ≥ M 冷媒 ≥ M min , control the operating state of the air conditioner to remain unchanged.

3. The air conditioner control method according to claim 1, wherein, The air conditioner control method includes: when M min > M 冷媒 , it is determined whether M min - M 冷媒 is greater than 50 g; wherein, When M min -M 冷媒 > 50 g, control the air conditioner to shut down and recharge the refrigerant; and / or When M min -M 冷 When the medium ≤ 50 g, the said Δf is positive.

4. The air conditioner control method according to any one of claims 1 to 3, characterized in that, When performing the step of correcting the preset frequency f to f + Δf according to the refrigerant amount judgment result, the air conditioner control method includes: setting a first temperature range T1 and a second temperature range T2; wherein, T1 < T2; Obtain the temperature T of the corresponding outdoor environment 外环 , and judge T 外环 for its magnitude relationship with T1 and T2 to obtain a temperature judgment result; selecting a correction value Δf according to the temperature judgment result.

5. The air conditioner control method according to claim 4, wherein, When performing the step of selecting a correction value Δf according to the temperature judgment result, the air conditioner control method includes: When T 外环 < T1, the preset frequency f is f1, and the correction value Δf is Δf1; When T1 ≤ T 外环 ≤ T2, the preset frequency f is f2, and the correction value Δf is Δf2; When T 外环 > T2, the preset frequency f is f3, and the correction value Δf is Δf3; wherein, f1 < f2 < f3, Δf1 ≥ Δf2 ≥ Δf3.

6. The air conditioner control method according to claim 5, wherein, When performing the step of selecting a correction value Δf according to the temperature judgment result, the air conditioner control method further includes: When T 外环 <T1 and M 冷媒 >M max , Δf1 = [-1, 0); when T 外环 <T1 and M min >M 冷媒 , Δf1 = [2, 3]; and / or When T1 ≤ T 外环 ≤ T2, and M 冷媒 > M max at that time, Δf2 = [-2, -1]; when T1 ≤ T 外环 ≤ T2, and M min > M 冷媒 at that time, Δf2 = [1, 2]; and / or When T 外环 > T2 and M 冷媒 > M max , Δf3 = [-3, -2]; when T 外环 > T2 and M min > M 冷媒 , Δf3 = (0, 1].

7. The air conditioner control method according to claim 4, wherein when the air conditioner operates in the cooling mode, T1 = [24°C, 27°C], T2 = [32°C, 35°C]; when the air conditioner operates in the heating mode, T1 = [5°C, 8°C], T2 = [18°C, 21°C].

8. The air conditioner control method according to claim 1, wherein When performing the step of obtaining the refrigerant amount M in the air conditioner 冷媒 The air conditioner control method includes: obtaining the cooling / heating capacity Q of the air conditioner, with the unit of kW; Obtain the enthalpy difference Δh corresponding to the tube temperature before and after the change of the tube temperature of the heat exchange tube of the indoor heat exchanger of the air conditioner 管温 , with the unit of kJ / kg; Calculate the refrigerant amount M according to the following formula 冷媒 :[[]]END]] 9. The air conditioner control method according to claim 8, wherein, When performing the step of obtaining the enthalpy difference Δh corresponding to the tube temperature before and after the change of the heat exchange tube of the indoor heat exchanger, the air conditioner control method includes: obtaining and storing the tube temperature data of the heat exchange tube of the indoor heat exchanger when the air conditioner is operating, with the unit of °C; Every first predetermined time period, the pipe temperature data T at the current moment is compared once 管 ' with the pipe temperature data T before the first predetermined time period 管 to determine the magnitude relationship therebetween; When T 管 '≠T 管 , the enthalpy difference Δh of the tube temperature is calculated according to the following formula 管温 : Δh 管温 = C p |T 管 - T 管 '|; Among them, C p is the specific heat capacity at constant pressure of air. In the above formula, C p = 1.005 kJ / kg·°C.

10. The air conditioner control method according to claim 8, characterized in that, When performing the step of obtaining the cooling / heating capacity Q in the air conditioner, the air conditioner control method includes: Obtain the temperature T at the air inlet of the air conditioner in and the temperature T at the air outlet out ; calculating the inlet and outlet temperature enthalpy difference Δh according to the following formula, with the unit of kJ / kg: Δh = C p |T in -T out |; where C p is the specific heat capacity at constant pressure of air. In the above formula, C p = 1.005 kJ / kg·°C; Obtain the air supply volume S of the air conditioner 风量 , in the unit of m 3 / h; calculating the cooling / heating capacity Q according to the following formula: Q = ρ × S 风量 × Δh; Among them, ρ is the air density, ρ = 1.225 kg / m 3 .

11. The air conditioner control method according to claim 10, wherein, When performing the step of obtaining the air supply volume S of the air conditioner 风量 , the air conditioner control method includes: obtaining the rotation speed r of the indoor fan of the air conditioner, with the unit of rpm; Using the fitting relationship curve graph of the rotational speed of the internal fan and the air supply volume, the air supply volume S of the air conditioner corresponding to the rotational speed r of the internal fan is obtained 风量 .

12. The air conditioner control method according to claim 8, wherein When performing the step of obtaining the cooling / heating capacity Q in the air conditioner, the air conditioner control method includes: Obtain the volume V of the interior where the air conditioner is located, with the unit of m 3 , and obtain the air density ρ = 1.225 kg / m 3 ; calculating the indoor air mass flow rate M according to the following formula, with the unit of kg / s: M = ρ × V; obtaining the room temperature data of the temperature change in the room where the air conditioner is located, with the unit of °C; every second predetermined time period, calculating the difference Δt between the room temperature data at the current moment and the room temperature data before the second predetermined time period, and judging whether Δt is 0°C; when Δt ≠ 0°C, obtaining the leaked cooling / heating amount A in the room, with the unit of kW; calculating the cooling / heating capacity Q according to the following formula: Q = C p MΔt + A; Among them, C p is the specific heat capacity at constant pressure of air. In the above formula, C p = 1.005 kJ / kg·°C.

13. The air conditioner control method according to claim 12, wherein The air conditioner control method further includes: when the room only dissipates heat through convective heat transfer and heat conduction, then A = k1A1Δt1 + k2A2Δt2; where k1 is the convective heat transfer coefficient, A1 is the convective heat transfer area, Δt1 is the convective heat transfer temperature difference, k2 is the heat conduction heat transfer coefficient, A2 is the heat conduction heat transfer area, and Δt2 is the heat conduction heat transfer temperature difference.

14. An air conditioner, characterized in that, Applicable to the air conditioner control method according to any one of claims 1 to 13, the air conditioner includes: an air conditioner body, the air conditioner body including a housing and an indoor heat exchanger disposed in the housing; a heat exchanger temperature detection component, the heat exchanger temperature detection component being disposed on the heat exchange tube of the indoor heat exchanger to detect the tube temperature of the heat exchange tube.

15. The air conditioner according to claim 14, characterized in that, The air conditioner further includes: an inlet air temperature detection component and an outlet air temperature detection component, the housing includes an air inlet and an air outlet, and the inlet air temperature detection component and the outlet air temperature detection component are respectively arranged at the air inlet and the air outlet; and / or an indoor temperature detection component, which is placed indoors where the air conditioner is located or installed outside the housing to detect the indoor temperature.

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