Control method of air conditioner, air conditioner and machine readable storage medium

Abstract

The invention provides a control method of an air conditioner, the air conditioner and a machine readable storage medium. The control method of the air conditioner comprises the steps that a shutdown signal of a compressor of the air conditioner is received; an indoor fan of the air conditioner is controlled to operate according to the preset rotating speed or the preset air gear, and the delay closing duration of the indoor fan is recorded; the actual energy efficiency of the air conditioner is obtained; the operation state of the indoor fan is determined according to the actual energy efficiency and the delay closing duration; and controlling the indoor fan to work according to the determined operation state. According to the scheme, the operation state of the indoor fan in the delayed closing period can be accurately adjusted, the attenuation coefficient is effectively reduced, and therefore the energy efficiency of the air conditioner is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a control method for an air conditioner, an air conditioner, and a machine-readable storage medium. Background Art

[0002] With the development of society and the continuous improvement of people's living standards, various air conditioning devices have become one of the indispensable electrical devices in people's daily lives. Various air conditioning devices can help people achieve a comfortable temperature and humidity when the ambient temperature and humidity are too high or too low. Current air conditioning devices mainly include various types of air conditioners and fans.

[0003] When the air conditioner is operating in cooling mode, it provides cooling to the indoor environment to lower the indoor temperature, making the user feel cool. When currently operating in cooling mode, the refrigeration system of an air conditioner often operates in a cycle, first working for a few minutes and then stopping for a few minutes. When the compressor just stops, the evaporator is still in a low-pressure state, and the liquid refrigerant is still evaporating and absorbing heat. Currently, the indoor fan is either turned off together with the compressor, or a fixed delay time is set, and the indoor fan runs at a fixed speed. These practices cannot maximize the reduction of the degradation coefficient (CD coefficient), and thus cannot effectively improve the seasonal energy efficiency ratio (SEER) of the air conditioner, affecting the user experience. Summary of the Invention

[0004] An object of the present invention is to accurately adjust the operating state of an indoor fan during delayed shutdown, effectively reduce the attenuation coefficient, and thus improve the energy efficiency of the air conditioner.

[0005] A further object of the present invention is to reduce the power consumption of the air conditioner and improve the user experience.

[0006] In particular, the present invention provides a control method for an air conditioner, comprising: receiving a shutdown signal of a compressor of the air conditioner; controlling the indoor fan of the air conditioner to operate at a preset speed or a preset wind speed and recording its delayed shutdown time; obtaining the actual energy efficiency of the air conditioner; determining the operating status of the indoor fan based on the actual energy efficiency and the delayed shutdown time; and controlling the indoor fan to operate according to the determined operating status.

[0007] Optionally, the step of obtaining the actual energy efficiency of the air conditioner includes: obtaining the return air temperature, the outlet air temperature, and the air volume and power of the indoor fan of the air conditioner; and calculating the actual energy efficiency of the air conditioner according to the formula EER D =1.004*1.29V*(T1-T0) / P DCalculate the actual energy efficiency, where EER D is the actual energy efficiency, V is the air volume, T1 is the return air temperature, T0 is the outlet air temperature, P D For power.

[0008] Optionally, the step of determining the operating status of the indoor fan based on the actual energy efficiency and the delayed shutdown time includes: judging whether the actual energy efficiency is less than or equal to a first preset value or whether the delayed shutdown time is greater than or equal to a preset time; and if so, determining that the indoor fan is turned off.

[0009] Optionally, when the actual energy efficiency is less than or equal to the second preset value and greater than the first preset value, and the delayed shutdown time is less than the preset time, it is determined that the indoor fan reduces the speed or lowers the wind speed.

[0010] Optionally, when the actual energy efficiency is greater than the second preset value and the delayed shutdown time is less than the preset time, it is determined that the indoor fan continues to operate at the preset speed or preset wind speed.

[0011] Optionally, the preset rotational speed is less than or equal to the rotational speed when the shutdown signal is received; or the preset wind speed is less than or equal to the wind speed when the shutdown signal is received.

[0012] Optionally, temperature sensors are provided at both the return air inlet and the outlet of the air conditioner, and the step of obtaining the return air temperature and the outlet air temperature of the air conditioner includes: obtaining the return air temperature and the outlet air temperature by detecting with the temperature sensors.

[0013] Optionally, a power acquisition module is provided at the indoor fan, and the step of obtaining the power of the indoor fan includes: acquiring power through the power acquisition module.

[0014] According to another aspect of the present invention, an air conditioner is provided, comprising: a controller, the controller comprising a memory and a processor, wherein the memory stores a machine executable program, and when the machine executable program is executed by the processor, any of the above-mentioned air conditioner control methods is implemented.

[0015] According to another aspect of the present invention, a machine-readable storage medium is provided, on which a machine-executable program is stored. When the machine-executable program is executed by a processor, any of the above-mentioned air conditioner control methods is implemented.

[0016] The control method, air conditioner and machine-readable storage medium of the air conditioner of the present invention receive the shutdown signal of the compressor of the air conditioner, control the indoor fan of the air conditioner to operate at a preset speed or a preset wind speed and record its delayed shutdown time, obtain the actual energy efficiency of the air conditioner, determine the operating status of the indoor fan according to the actual energy efficiency and the delayed shutdown time, control the indoor fan to operate according to the determined operating status, and can accurately adjust the operating status of the indoor fan during the delayed shutdown period, effectively reduce the attenuation coefficient, and thus improve the energy efficiency of the air conditioner.

[0017] Furthermore, the control method, air conditioner and machine-readable storage medium of the air conditioner of the present invention determine that the indoor fan is turned off when the actual energy efficiency is less than or equal to a first preset value or the delayed shutdown time is greater than or equal to the preset time; determine that the indoor fan reduces the speed or lowers the wind speed when the actual energy efficiency is less than or equal to a second preset value and greater than the first preset value, and the delayed shutdown time is less than the preset time; and determine that the indoor fan continues to operate at the preset speed or preset wind speed when the actual energy efficiency is greater than the second preset value and the delayed shutdown time is less than the preset time. The speed or wind speed of the indoor fan can be accurately adjusted according to the actual energy efficiency of the air conditioner and the delayed shutdown time of the indoor fan, effectively reducing the power consumption of the air conditioner while reducing the attenuation coefficient, and improving the user experience.

[0018] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0020] Figure 1 is a schematic diagram of a method for controlling an air conditioner according to an embodiment of the present invention;

[0021] Figure 2 is a detailed flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

[0022] Figure 3 is a schematic block diagram of a controller of an air conditioner according to an embodiment of the present invention; and

[0023] Figure 4 is a schematic diagram of a machine-readable storage medium according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] This embodiment first provides a control method for an air conditioner, which can accurately adjust the operating state of the indoor fan during the delayed shutdown period, effectively reduce the attenuation coefficient, and thus improve the energy efficiency of the air conditioner. Figure 1 FIG. 1 is a schematic diagram of a method for controlling an air conditioner according to an embodiment of the present invention. Figure 1 As shown, the control method of the air conditioner may include the following steps:

[0025] Step S102, receiving a stop signal of the compressor of the air conditioner;

[0026] Step S104, controlling the indoor fan of the air conditioner to operate at a preset speed or a preset wind speed and recording its delayed shutdown time;

[0027] Step S106, obtaining the actual energy efficiency of the air conditioner;

[0028] Step S108, determining the operating state of the indoor fan according to the actual energy efficiency and the delayed shutdown time;

[0029] Step S110: Control the indoor fan to operate according to the determined operating state.

[0030] In the above steps, step S102 receives a shutdown signal from the air conditioner's compressor. For example, when the air conditioner is operating in cooling mode, the refrigeration system may operate cyclically, first operating for a few minutes and then stopping for a few minutes. For example, it may operate for 6 minutes and then stop for 24 minutes. Therefore, the shutdown signal may be received after the refrigeration system has been operating for 6 minutes. Furthermore, in other embodiments, the shutdown signal may also be received when the air conditioner is shut down.

[0031] After receiving the shutdown signal from the air conditioner compressor, the compressor can be controlled to stop working, but step S104 needs to be executed to control the indoor fan of the air conditioner to run at a preset speed or preset wind speed and record its delayed shutdown time. In other words, after receiving the shutdown signal, the compressor can be controlled to stop, but the indoor fan can continue to run to achieve delayed shutdown. Among them, the delayed shutdown time of the indoor fan can actually be recorded by starting the time the shutdown signal is received and recording the time the indoor fan continues to run as the delayed shutdown time.

[0032] In a specific embodiment, the preset speed in step S104 is less than or equal to the speed when the stop signal is received; or the preset wind speed is less than or equal to the wind speed when the stop signal is received. That is, when the stop signal is received, if the indoor fan is running at a certain speed, then the preset speed is less than or equal to the speed. When the stop signal is received, if the indoor fan is running at a certain wind speed, then the preset wind speed is less than or equal to the wind speed. Generally, the speed can include successively decreasing speeds: high speed, medium speed, and low speed. The wind speed can include successively increasing speeds: 1st gear, 2nd gear, 3rd gear, 4th gear, and 5th gear. It should be noted that the specific setting methods of the above-mentioned speeds and wind speeds are only examples and are not limitations of the present invention. In other embodiments, it can be set to other methods according to actual conditions.

[0033] Step S106 obtains the actual energy efficiency of the air conditioner. In a preferred embodiment, the return air temperature, the outlet air temperature, and the air volume and power of the indoor fan of the air conditioner can be obtained; and according to the formula EER D =1.004*1.29V*(T1-T0) / P D Calculate the actual energy efficiency, where EER D is the actual energy efficiency, V is the air volume, T1 is the return air temperature, T0 is the outlet air temperature, P D For power.

[0034] Specifically, when the air conditioner is usually running in cooling mode, the indoor humidity is low. Without considering the latent heat of the air, the cooling capacity of the air conditioner is Q = Cm△T, where C refers to the specific heat capacity of the air, C = 1.004kJ / (kg K) at normal temperature and pressure, m refers to the weight of the air, in kg, m = V*ρt, V is the air volume, in m 3 / s, ρ is the air density, which is 1.29 kg / m3 at normal temperature and pressure, and t is the unit time, recorded as 1 second. When the speed of the indoor fan and the static pressure are constant, V is a constant, so m is also a constant, m = 1.29 V (kg). Based on the above formulas, the cooling capacity Q = 1.004 * 1.29 V * (T1-T0), and the energy efficiency EER D =Q / P D =1.004*1.29V*(T1-T0) / P D .

[0035] Step S108 determines the operating status of the indoor fan based on the actual energy efficiency and the delayed shutdown duration. Specifically, the on / off status of the indoor fan, as well as the speed and wind speed when the indoor fan is on, can be determined. Currently, indoor fans are either shut down together with the compressor, or a fixed delay time is set, with the indoor fan running at a fixed speed. These practices fail to maximize the reduction of the attenuation coefficient, and thus fail to effectively improve the seasonal energy efficiency ratio of the air conditioner, affecting the user experience. The air conditioner control method of this embodiment can accurately adjust the operating status of the indoor fan during the delayed shutdown period, effectively reducing the attenuation coefficient, and thus improving the energy efficiency of the air conditioner.

[0036] Specifically, according to the U.S. ARI210 / 240 standard, the seasonal energy efficiency ratio (SEER) of North American high-efficiency fixed-speed air conditioners is EER B ×(1-0.5×CD), from the formula we can see that in EER B Under certain conditions, a smaller CD coefficient is more conducive to improving SEER. Factors influencing the CD coefficient include compressor type, throttling device type, indoor fan delay time, and indoor fan power. Without changing the overall cost of the unit, the CD coefficient can be reduced by appropriately delaying the fan shutdown time and adjusting the fan power during the delayed shutdown phase.

[0037] According to the ARI210 / 240 standard, For machines with delays, Δτ D =30 / (6+Δt), where Δt is the delayed shutdown time of the indoor fan. From the first formula above, It can be seen that EER D The larger the CD coefficient, the smaller the CD coefficient. Therefore, the energy efficiency of the air conditioner can be improved by reducing the CD coefficient.

[0038] When operating in cooling mode, current air conditioners often cycle through the cooling system, first operating for a few minutes and then stopping for a few minutes. When the compressor is just shut down, the evaporator is still at low pressure, and the liquid refrigerant is still evaporating and absorbing heat. At this time, only the indoor fan is running. Using the indoor fan to blow out the remaining cooling energy in the evaporator can improve EER. D However, as time goes by, the residual cooling capacity of the evaporator also decreases. At this time, if the speed or wind speed of the indoor fan is not reduced, the evaporator absorbs heat as the delayed shutdown time increases, which will lead to a decrease in the cooling capacity of the indoor machine. If the indoor fan is still running at a fixed speed or wind speed, it will not be conducive to improving the overall EER. D This is also the purpose of the air conditioner control method of this embodiment to accurately adjust the operating state of the indoor fan during the delayed shutdown period, that is, to ensure that the attenuation coefficient can be effectively reduced during the entire delayed shutdown period and improve the energy efficiency of the air conditioner.

[0039] Step S110 controls the indoor fan to operate according to the determined operating state, which can maximize the purpose of reducing the CD coefficient by delaying the indoor fan, thereby maximizing the energy efficiency of the air conditioner. Specifically, if it is determined that the indoor fan is off, the indoor fan can be controlled to be off. If it is determined that the indoor fan is operating at a reduced speed or a lowered wind speed, the indoor fan can be controlled to operate at a reduced speed or a lowered wind speed. If it is determined that the indoor fan continues to operate at a preset speed or a preset wind speed, the indoor fan can be controlled to continue to operate at the preset speed or the preset wind speed.

[0040] In summary, the control method of the air conditioner in this embodiment receives the shutdown signal of the compressor of the air conditioner, controls the indoor fan of the air conditioner to operate at a preset speed or a preset wind speed and records its delayed shutdown time, obtains the actual energy efficiency of the air conditioner, determines the operating status of the indoor fan according to the actual energy efficiency and the delayed shutdown time, controls the indoor fan to operate according to the determined operating status, and can accurately adjust the operating status of the indoor fan during the delayed shutdown period, effectively reduce the attenuation coefficient, and thus improve the energy efficiency of the air conditioner.

[0041] In some optional embodiments, the air conditioner can achieve higher technical effects by further optimizing and configuring the above steps. The following describes in detail the control method of the air conditioner of this embodiment in combination with an introduction to an optional execution process of this embodiment. This embodiment is only an example of the execution process. During specific implementation, the execution order and operating conditions of some steps can be modified according to specific implementation requirements. Figure 2 FIG. 1 is a detailed flow chart of a method for controlling an air conditioner according to an embodiment of the present invention. The method for controlling an air conditioner includes the following steps:

[0042] Step S202, receiving a stop signal of the compressor of the air conditioner;

[0043] Step S204, controlling the indoor fan of the air conditioner to operate at a preset speed or a preset wind speed and recording its delayed shutdown time;

[0044] Step S206, obtaining the return air temperature, outlet air temperature, and air volume and power of the indoor fan of the air conditioner;

[0045] Step S208, according to the formula EER D =1.004*1.29V*(T1-T0) / P D Calculate the actual energy efficiency of the air conditioner;

[0046] Step S210, determining whether the actual energy efficiency is less than or equal to a first preset value or whether the delayed shutdown time is greater than or equal to a preset time, if so, executing step S212, if not, executing step S214;

[0047] Step S212, determining whether the indoor fan is turned off;

[0048] Step S214, determining whether the actual energy efficiency is less than or equal to the second preset value and greater than the first preset value, and whether the delayed shutdown time is less than the preset time. If so, proceed to step S216; if not, proceed to step S218;

[0049] Step S216, determining whether the indoor fan should reduce its speed or operate at a lower wind speed;

[0050] Step S218: If the actual energy efficiency is greater than the second preset value and the delayed shutdown time is less than the preset time, it is determined that the indoor fan continues to operate at the preset speed or the preset wind speed;

[0051] Step S220: Control the indoor fan to operate according to the determined operating state.

[0052] In the above steps, steps S202 and S204 are first executed to receive a shutdown signal from the air conditioner's compressor, control the air conditioner's indoor fan to operate at a preset speed or at a preset wind speed, and record the delayed shutdown duration. Taking the air conditioner operating in cooling mode as an example, the refrigeration system may operate cyclically, first operating for a few minutes and then stopping for a few minutes. For example, it may operate for 6 minutes and then stop for 24 minutes. Therefore, the shutdown signal may be received after the refrigeration system has been operating for 6 minutes. In addition, in some other embodiments, the shutdown signal may also be received when the air conditioner is shut down.

[0053] After receiving a shutdown signal from the air conditioner's compressor, the compressor can be controlled to stop, but the indoor fan of the air conditioner needs to be controlled to run at a preset speed or a preset wind speed and its delayed shutdown duration is recorded. In other words, after receiving the shutdown signal, the compressor can be controlled to stop, but the indoor fan can continue to run to achieve delayed shutdown. Among them, the delayed shutdown duration of the indoor fan can actually be recorded by starting the time the shutdown signal is received and recording the duration that the indoor fan continues to run as the delayed shutdown duration.

[0054] In a specific embodiment, the preset speed in step S204 is less than or equal to the speed when the stop signal is received; or the preset wind speed is less than or equal to the wind speed when the stop signal is received. That is, when the stop signal is received, if the indoor fan is running at a certain speed, then the preset speed is less than or equal to the speed. When the stop signal is received, if the indoor fan is running at a certain wind speed, then the preset wind speed is less than or equal to the wind speed. Generally, the speed can include high speed, medium speed, and low speed. The wind speed can include: 1st gear, 2nd gear, 3rd gear, 4th gear, and 5th gear. It should be noted that the specific setting method of the above-mentioned speed and wind speed is only for example, and is not a limitation of the present invention. In some other embodiments, it can be set to other methods according to actual conditions.

[0055] Then, step S206 and step S208 can be executed to obtain the return air temperature, outlet air temperature, and air volume and power of the indoor fan of the air conditioner. D =1.004*1.29V*(T1-T0) / P D Calculate the actual energy efficiency of the air conditioner. D is the actual energy efficiency, V is the air volume, T1 is the return air temperature, T0 is the outlet air temperature, P D For power.

[0056] In a preferred embodiment, temperature sensors are provided at both the return air inlet and the outlet of the air conditioner, and obtaining the return air temperature and the outlet air temperature of the air conditioner may include detecting the return air temperature and the outlet air temperature using the temperature sensors. A power acquisition module may be provided at the indoor fan, and obtaining the power of the indoor fan may include acquiring the power using the power acquisition module. In other embodiments, the power of the indoor fan may also be pre-set to a preset value. When the speed and static pressure of the indoor fan are constant, V is a constant value; that is, the air volume can be determined based on the speed and static pressure of the indoor fan.

[0057] Then step S210 can be executed to determine whether the actual energy efficiency is less than or equal to the first preset value or whether the delayed shutdown time is greater than or equal to the preset time. If the judgment result of step S210 is yes, that is, the actual energy efficiency is less than or equal to the first preset value or the delayed shutdown time is greater than or equal to the preset time, step S212 is executed to determine whether the indoor fan is turned off.

[0058] That is to say, if the actual energy efficiency is less than or equal to the first preset value or the delayed shutdown time is greater than or equal to the preset time, one of the two conditions is met, it can be determined that the indoor fan is turned off, thereby ending the delayed shutdown process of the indoor fan.

[0059] If the judgment result of step S210 is no, that is, the actual energy efficiency is greater than the first preset value and the delayed shutdown time is less than the preset time, execute step S214 to continue to judge whether the actual energy efficiency is less than or equal to the second preset value and greater than the first preset value, and the delayed shutdown time is less than the preset time. If the judgment result of step S214 is yes, that is, the actual energy efficiency is less than or equal to the second preset value and greater than the first preset value, and the delayed shutdown time is less than the preset time, execute step S216 to determine whether the indoor fan reduces the speed or lowers the wind speed.

[0060] Specifically, if the indoor fan of the air conditioner is controlled to operate at a preset speed in step S204, step S216 may determine that the indoor fan is operated at a reduced speed. If the indoor fan of the air conditioner is controlled to operate at a preset wind speed in step S204, step S216 may determine that the indoor fan is operated at a reduced wind speed. The specific value of the reduced speed and the specific wind speed level can be set according to actual conditions so that the operating state of the indoor fan meets the current energy efficiency of the air conditioner.

[0061] According to the execution order of the above steps, if the judgment result of step S214 is no, it can be accurately determined that the actual energy efficiency is greater than the second preset value, and the delayed shutdown time is less than the preset time, that is, step S218 is executed, the actual energy efficiency is greater than the second preset value, and the delayed shutdown time is less than the preset time, and it is determined that the indoor fan continues to operate at the preset speed or preset wind speed.

[0062] Specifically, if the indoor fan of the air conditioner is controlled to operate at a preset speed in step S204, step S218 may be to determine that the indoor fan continues to operate at the preset speed. If the indoor fan of the air conditioner is controlled to operate at a preset wind speed in step S204, step S218 may be to determine that the indoor fan continues to operate at the preset wind speed.

[0063] Step S220 may be executed after step S212, step S216, and step S218 to control the indoor fan to operate according to the determined operating state. Specifically, step S220 is executed after step S212 determines that the indoor fan is turned off, and the indoor fan is controlled to operate according to the determined operating state, which actually means controlling the indoor fan to be turned off. Step S220 is executed after step S216 determines that the indoor fan reduces the speed or lowers the wind speed to operate, and the indoor fan is controlled to operate according to the determined operating state, which actually means controlling the indoor fan to reduce the speed or lower the wind speed to operate. Step S220 is executed after step S218 determines that the indoor fan continues to operate at a preset speed or a preset wind speed, and the indoor fan is controlled to operate according to the determined operating state, which actually means controlling the indoor fan to continue to operate at a preset speed or a preset wind speed.

[0064] It should be noted that the second preset value is greater than the first preset value. In a specific embodiment, the first preset value may be 20 Btu / (h*w), the second preset value may be 60 Btu / (h*w), and the preset duration may be 90 seconds. The specific values ​​of the above preset parameters are merely examples and are not intended to limit the present invention. In other embodiments, other values ​​may be set based on actual conditions, provided that they maintain a significant relationship with each other.

[0065] Based on a first preset value of 20 Btu / (h*w), a second preset value of 60 Btu / (h*w), and a preset duration of 90 seconds, several specific embodiments are described below. In the first specific embodiment, after receiving a shutdown signal, the indoor fan of the air conditioner is first controlled to operate at a preset speed, and the return air temperature, outlet air temperature, and air volume and power of the air conditioner are obtained. If the actual energy efficiency EERD at this time is calculated to be 98 Btu / (h*w), since the actual energy efficiency is greater than the second preset value of 60 Btu / (h*w), the indoor fan can be controlled to continue operating at the preset speed. After 10 seconds, the actual energy efficiency EERD is detected to be 50 Btu / (h*w). Since the actual energy efficiency is less than the second preset value of 60 Btu / (h*w) and greater than the first preset value of 20 Btu / (h*w), and the delayed shutdown duration of 10 seconds is less than the preset duration of 90 seconds, the indoor fan can be controlled to reduce its speed by 10 r / s. After 80 seconds, it is detected that the actual energy efficiency EERD = 15 Btu / (h*w). Since the actual energy efficiency is less than the first preset value 20 Btu / (h*w), the indoor fan can be controlled to be turned off, so that the delayed shutdown process of the indoor fan ends.

[0066] Second specific embodiment: After receiving a shutdown signal, the indoor fan of the air conditioner is first controlled to operate at a preset speed, and the return air temperature, outlet air temperature, and air volume and power of the air conditioner are obtained. If the actual energy efficiency EERD at this time is calculated to be 98 Btu / (h*w), since the actual energy efficiency is greater than the second preset value of 60 Btu / (h*w), the indoor fan can be controlled to continue operating at the preset speed. 10 seconds later, the actual energy efficiency EERD is detected to be 40 Btu / (h*w). Since the actual energy efficiency is less than the second preset value of 60 Btu / (h*w) and greater than the first preset value of 20 Btu / (h*w), and the delayed shutdown duration of 10 seconds is less than the preset duration of 90 seconds, the indoor fan can be controlled to reduce its speed to 30 r / s. After 90 seconds, it is detected that the actual energy efficiency EERD = 40 Btu / (h*w). Although the actual energy efficiency is still less than the second preset value 60 Btu / (h*w) and greater than the first preset value 20 Btu / (h*w), since the delayed shutdown time of 90 seconds reaches the preset time, the indoor fan can be controlled to shut down, so that the delayed shutdown process of the indoor fan ends.

[0067] Third specific embodiment: After receiving a shutdown signal, the indoor fan of the air conditioner is first controlled to operate at a preset speed, and the return air temperature, outlet air temperature, and air volume and power of the air conditioner are obtained. If the actual energy efficiency EERD at this time is calculated to be 80 Btu / (h*w), since the actual energy efficiency is greater than the second preset value of 60 Btu / (h*w), the indoor fan can be controlled to continue operating at the preset speed. 10 seconds later, the actual energy efficiency EERD is detected to be 45 Btu / (h*w). Since the actual energy efficiency is less than the second preset value of 60 Btu / (h*w) and greater than the first preset value of 20 Btu / (h*w), and the delayed shutdown duration of 10 seconds is less than the preset duration of 90 seconds, the indoor fan can be controlled to operate at a lower speed by one level every 30 seconds until it reaches the lowest level. After 80 seconds, it is detected that the actual energy efficiency EERD = 19 Btu / (h*w). Since the actual energy efficiency is less than the first preset value 20 Btu / (h*w), the indoor fan can be controlled to be turned off, so that the delayed shutdown process of the indoor fan ends.

[0068] Fourth specific embodiment: After receiving a shutdown signal, the indoor fan of the air conditioner is first controlled to operate at a preset speed, and the return air temperature, outlet air temperature, and air volume and power of the air conditioner are obtained. If the actual energy efficiency EERD at this time is calculated to be 98 Btu / (h*w), since the actual energy efficiency is greater than the second preset value of 60 Btu / (h*w), the indoor fan can be controlled to continue operating at the preset speed. 10 seconds later, the actual energy efficiency EERD is detected to be 40 Btu / (h*w). Since the actual energy efficiency is less than the second preset value of 60 Btu / (h*w) and greater than the first preset value of 20 Btu / (h*w), and the delayed shutdown time of 10 seconds is less than the preset time of 90 seconds, the indoor fan can be controlled to reduce the speed to 30 r / s. After 40 seconds, the actual energy efficiency EERD is detected as 40 Btu / (h*w). The actual energy efficiency is still less than the second preset value of 60 Btu / (h*w) and greater than the first preset value of 20 Btu / (h*w). The delayed shutdown time of 40 seconds is still less than the preset time of 90 seconds. Therefore, the indoor fan can be controlled to continue to reduce the speed. The speed of reducing the speed can remain unchanged at 30 r / s or be changed to 20 r / s. After 90 seconds, the actual energy efficiency EERD is detected as 22 Btu / (h*w). Although the actual energy efficiency is still less than the second preset value of 60 Btu / (h*w) and greater than the first preset value of 20 Btu / (h*w), since the delayed shutdown time of 90 seconds has reached the preset time, the indoor fan can be controlled to shut down, so that the delayed shutdown process of the indoor fan ends.

[0069] In summary, the control method of the air conditioner in this embodiment determines that the indoor fan is turned off when the actual energy efficiency is less than or equal to the first preset value or the delayed shutdown time is greater than or equal to the preset time; determines that the indoor fan reduces the speed or lowers the wind speed when the actual energy efficiency is less than or equal to the second preset value and greater than the first preset value, and the delayed shutdown time is less than the preset time; determines that the indoor fan continues to operate at the preset speed or preset wind speed when the actual energy efficiency is greater than the second preset value and the delayed shutdown time is less than the preset time. The speed or wind speed of the indoor fan can be accurately adjusted according to the actual energy efficiency of the air conditioner and the delayed shutdown time of the indoor fan, effectively reducing the power consumption of the air conditioner while reducing the attenuation coefficient, and improving the user experience.

[0070] According to repeated tests by the inventors, compared to air conditioners that do not reduce speed or fan speed, air conditioners that do reduce speed and fan speed have a CD coefficient that is 0.03 to 0.05 lower, improving the Seasonal Energy Efficiency Ratio (SEER) by 1% to 3%. Furthermore, this can reduce actual power consumption, effectively saving costs and reducing energy waste.

[0071] It should be noted that the air conditioner control method of this embodiment is applicable only when the air conditioner is operating in cooling mode. When the air conditioner is operating in heating mode, the air conditioner control method of this embodiment can be referred to, and the relevant steps can be adjusted. The operating state of the indoor fan during the delayed shutdown period can be adjusted in a similar manner to achieve the goal of reducing the CD coefficient and improving the energy efficiency of the air conditioner.

[0072] This embodiment further provides an air conditioner, which may include a controller 300 . Figure 3 FIG. 1 is a schematic block diagram of a controller 300 for an air conditioner according to an embodiment of the present invention. Figure 3 As shown, the controller 300 may include: a processor 310 and a memory 320 , wherein the memory 320 stores a machine executable program 321 , and when the machine executable program 321 is executed by the processor 310 , it is used to implement any of the above-mentioned air conditioner control methods.

[0073] The processor 310 can be a central processing unit (CPU), a digital processing unit, or the like. The processor 310 sends and receives data via a communication interface. The memory 320 is used to store a machine-executable program 321 executed by the processor 310. The memory 320 is any medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, and can also be a combination of multiple memories 320. The machine-executable program 321 can be downloaded from a computer-readable storage medium to a corresponding computing / processing device or downloaded and installed to the controller 300 via a network (e.g., the Internet, a local area network, a wide area network, and / or a wireless network).

[0074] The controller 300 can be used to control the operation of the air conditioner itself, as well as receive and send signals to other devices. For example, it can send and receive signals to a mobile terminal. The air conditioner in this embodiment can accurately adjust the operating state of the indoor fan during the delayed shutdown period, effectively reducing the attenuation coefficient, thereby improving the energy efficiency of the air conditioner. The speed or wind speed of the indoor fan is accurately adjusted based on the actual energy efficiency of the air conditioner and the delayed shutdown duration of the indoor fan, effectively reducing the attenuation coefficient while also reducing the power consumption of the air conditioner, thereby improving the user experience.

[0075] This embodiment also provides a machine-readable storage medium 400, Figure 4 3 is a schematic diagram of a machine-readable storage medium 400 according to an embodiment of the present invention. The machine-readable storage medium 400 stores a machine-executable program 321. When the machine-executable program 321 is executed by the processor 310, the air conditioner control method of any of the above embodiments is implemented.

[0076] The machine-readable storage medium 400 of this embodiment can be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read-Only Memory), an EPROM, a hard disk, or a ROM. The machine-readable storage medium 400 has storage space for a machine-executable program 321 for executing any of the method steps described above. These machine-executable programs 321 can be read from or written to one or more computer program products. These computer program products include program code carriers such as a hard disk, a compact disk (CD), a memory card, or a floppy disk. When the device containing the machine-readable storage medium 400 runs the machine-executable program 321, each step of the method described above can be executed.

[0077] In the description of the present embodiment, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0078] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A method for controlling an air conditioner, comprising: receiving a stop signal of a compressor of the air conditioner; Controlling the indoor fan of the air conditioner to operate at a preset speed or a preset wind speed and recording its delayed shutdown time; Obtaining actual energy efficiency of the air conditioner; determining an operating state of the indoor fan according to the actual energy efficiency and the delayed shutdown time; as well as The indoor fan is controlled to operate according to the determined operating state.

2. The method according to claim 1, wherein the step of obtaining the actual energy efficiency of the air conditioner comprises: Obtaining the return air temperature, outlet air temperature of the air conditioner and the air volume and power of the indoor fan; as well as According to the formula EER D =1.004*1.29V*(T1-T0) / P D The actual energy efficiency is calculated, where EER D is the actual energy efficiency, V is the air volume, T1 is the return air temperature, T0 is the outlet air temperature, P D For the power.

3. The method according to claim 1, wherein the step of determining the operating state of the indoor fan according to the actual energy efficiency and the delayed shutdown time comprises: Determining whether the actual energy efficiency is less than or equal to a first preset value or whether the delayed shutdown duration is greater than or equal to a preset duration; as well as If so, it is determined that the indoor fan is turned off.

4. The method according to claim 3, wherein: When the actual energy efficiency is less than or equal to the second preset value and greater than the first preset value, and the delayed closing time is less than the preset time, it is determined that the indoor fan is operated at a reduced speed or at a lower wind speed.

5. The method according to claim 4, wherein When the actual energy efficiency is greater than the second preset value and the delayed shutdown time is less than the preset time, it is determined that the indoor fan continues to operate at the preset speed or the preset wind speed.

6. The method according to claim 1, wherein The preset speed is less than or equal to the speed when the shutdown signal is received; or The preset wind speed is lower than or equal to the wind speed when the shutdown signal is received.

7. The method according to claim 2, wherein: The return air outlet and the air outlet of the air conditioner are both provided with temperature sensors, and The step of obtaining the return air temperature and the outlet air temperature of the air conditioner includes: detecting and obtaining the return air temperature and the outlet air temperature by the temperature sensor.

8. The method according to claim 2, wherein: The indoor fan is provided with a power collection module, and The step of acquiring the power of the indoor fan includes: acquiring the power through the power acquisition module.

9. An air conditioner comprising: A controller comprising a memory and a processor, wherein the memory stores a machine executable program, and when the machine executable program is executed by the processor, the control method of the air conditioner according to any one of claims 1 to 8 is implemented.

10. A machine-readable storage medium having a machine-executable program stored thereon, wherein the machine-executable program, when executed by a processor, implements the air conditioner control method according to any one of claims 1 to 8.

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