Air conditioner and control method and device thereof, storage medium and computer program product

Abstract

The invention provides an air conditioner, a control method and device of the air conditioner, a storage medium and a computer program product, and the method comprises the steps that after the air conditioner is heated, started and operated, the outdoor environment temperature, the compressor frequency of the air conditioner and the rotating speed of an inner draught fan of the air conditioner are detected; whether the outdoor environment temperature is smaller than or equal to a preset temperature threshold value or not, whether the compressor frequency is larger than or equal to a first preset frequency threshold value and smaller than or equal to a second preset frequency threshold value or not and whether the inner fan rotating speed is smaller than or equal to a preset rotating speed threshold value or not are judged; and if it is judged that the outdoor environment temperature is smaller than or equal to the preset temperature threshold value, the frequency of the compressor is larger than or equal to a first preset frequency threshold value and smaller than or equal to a second preset frequency threshold value, and the rotating speed of the inner draught fan is smaller than or equal to a preset rotating speed threshold value, the opening degree of an electronic expansion valve of the air conditioner is controlled to be increased by a first preset opening degree value. According to the scheme, abnormal noise generated by the refrigerant through the electronic expansion valve can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of control, and particularly to an air conditioner and its control method, device, storage medium and computer program product. Background Art

[0002] With the development of the economy, people's living standards have been improved, the demand for air conditioners has been continuously increasing, and the functions of air conditioners have also been improved. Merely having the functions of cooling and heating can no longer meet the needs of users. Air conditioners are closely related to people's lives, and there are higher requirements for air conditioners. More consideration is given to comfort. The quality of the sound of the indoor unit of the air conditioner system directly affects consumers' evaluation of the product. Due to the unreasonable design of the outdoor unit pipeline, the refrigerant pulse of the outdoor unit is transmitted indoors, especially when heating, abnormal noise appears. The frequency of the sound pulse is low and can be radiated through the indoor unit, resulting in a very poor experience effect, bothering users and preventing them from resting normally, and greatly reducing the use of the air conditioner. Summary of the Invention

[0003] The main purpose of the present invention is to overcome the defects of the above-mentioned related technologies, and provide an air conditioner and its control method, device, storage medium and computer program product to solve the problem of abnormal noise during the heating operation of the air conditioner in the related technologies.

[0004] On the one hand, the present invention provides a control method for an air conditioner, including: after the air conditioner starts heating and runs, detecting the outdoor ambient temperature, the compressor frequency of the air conditioner, and the rotational speed of the indoor fan of the air conditioner; judging whether the outdoor ambient temperature is less than or equal to a preset temperature threshold, whether the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and whether the rotational speed of the indoor fan is less than or equal to a preset rotational speed threshold; if it is judged that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the rotational speed of the indoor fan is less than or equal to the preset rotational speed threshold, then controlling the opening degree of the electronic expansion valve of the air conditioner to increase by a first preset opening value.

[0005] Optionally, the electronic expansion valve of the air conditioner is not connected in series with a capillary tube.

[0006] Optionally, it further includes: if it is determined that the outdoor ambient temperature is greater than a preset temperature threshold, the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and the indoor fan speed is less than or equal to a preset speed threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a second preset opening value, where the first preset opening value is greater than the second preset opening value; and / or, if it is determined that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan speed is greater than the preset speed threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a third preset opening value, where the first preset opening value is greater than the third preset opening value.

[0007] Optionally, it further includes: if it is determined that the outdoor ambient temperature is greater than a preset temperature threshold, the compressor frequency is less than the first preset frequency threshold or greater than the second preset frequency threshold, and the indoor fan speed is greater than the preset speed threshold, then there is no need to adjust the opening of the electronic expansion valve of the air conditioner.

[0008] Optionally, the first preset frequency threshold is less than or equal to the lower limit value of the resonance frequency range of the compressor, and the second preset frequency threshold is greater than or equal to the upper limit value of the resonance frequency range of the compressor.

[0009] Optionally, it further includes: receiving a control instruction to reduce the noise of the air conditioner; when receiving the control instruction, detecting whether the compressor frequency of the air conditioner is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold;

[0010] If it is detected that the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a fourth preset opening value.

[0011] On the other hand, the present invention provides a control device for an air conditioner, including: a detection unit for detecting the outdoor ambient temperature, the compressor frequency of the air conditioner, and the indoor fan speed of the air conditioner after the air conditioner starts heating and operates; a judgment unit for judging whether the outdoor ambient temperature is less than or equal to a preset temperature threshold, whether the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and whether the indoor fan speed is less than or equal to a preset speed threshold; a control unit for, if the judgment unit judges that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan speed is less than or equal to the preset speed threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a first preset opening value.

[0012] Optionally, the electronic expansion valve of the air conditioner is not connected in series with a capillary tube.

[0013] Optionally, the control unit is further configured to: if the determination unit determines that the outdoor ambient temperature is greater than a preset temperature threshold, the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and the indoor fan speed is less than or equal to a preset speed threshold, increase the opening degree of the electronic expansion valve of the air conditioner by a second preset opening value, where the first preset opening value is greater than the second preset opening value; and / or, if the determination unit determines that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan speed is greater than the preset speed threshold, increase the opening degree of the electronic expansion valve of the air conditioner by a third preset opening value, where the first preset opening value is greater than the third preset opening value.

[0014] Optionally, the control unit is further configured to: if it is determined that the outdoor ambient temperature is greater than the preset temperature threshold, the compressor frequency is less than the first preset frequency threshold or greater than the second preset frequency threshold, and the indoor fan speed is greater than the preset speed threshold, there is no need to adjust the opening degree of the electronic expansion valve of the air conditioner.

[0015] Optionally, the first preset frequency threshold is less than or equal to the lower limit value of the resonance frequency range of the compressor, and the second preset frequency threshold is greater than or equal to the upper limit value of the resonance frequency range of the compressor.

[0016] Optionally, it further includes: a receiving unit, configured to receive a control instruction for reducing the noise of the air conditioner; the detecting unit is further configured to: when the receiving unit receives the control instruction, detect whether the compressor frequency of the air conditioner is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold; the control unit is further configured to: if the detecting unit detects that the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, increase the opening degree of the electronic expansion valve of the air conditioner by a fourth preset opening value.

[0017] Another aspect of the present invention provides a storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of any of the foregoing methods are implemented.

[0018] Another aspect of the present invention provides an air conditioner, including a processor, a memory, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, the steps of any of the foregoing methods are implemented.

[0019] Another aspect of the present invention provides an air conditioner, including the control device of any of the foregoing air conditioners.

[0020] In another aspect, the present invention provides a computer program product, including a computer program which, when executed by a processor, implements the steps of any of the foregoing methods.

[0021] According to the technical solution of the present invention, when the air conditioner operates in heating mode, by adjusting the opening degree of the electronic expansion valve, it is possible to avoid a small opening degree, prevent abnormal noise from being generated when a small amount of refrigerant passes through the small valve of the electronic expansion valve, improve comfort, and enhance the user experience.

[0022] According to the technical solution of the present invention, in the split air conditioner electronic expansion valve system without a capillary tube system, by detecting the outdoor ambient temperature, the compressor frequency, and the indoor fan speed, when the detected outdoor ambient temperature, compressor speed, and indoor fan speed reach a certain range of values, the opening degree of the electronic expansion valve is adjusted to make the opening degree of the electronic expansion valve larger, avoiding a small opening degree, preventing abnormal noise from being generated when a small amount of refrigerant passes through the small valve of the electronic expansion valve, improving comfort, and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and form a part 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:

[0024] Figure 1 is a schematic diagram of a method of an embodiment of the control method of the air conditioner provided by the present invention;

[0025] Figure 2 is a schematic diagram of a method of another embodiment of the control method of the air conditioner provided by the present invention;

[0026] Figure 3 is a schematic diagram of a method of yet another embodiment of the control method of the air conditioner provided by the present invention;

[0027] Figure 4 is a schematic diagram of a method of a specific embodiment of the control method of the air conditioner provided by the present invention;

[0028] Figure 5 is a block diagram of a structure of an embodiment of the control device of the air conditioner provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] The present invention provides a control method for an air conditioner.

[0032] This method is mainly used for split air conditioners. The method of the present invention is particularly applicable to the case where an electronic expansion valve is not connected in series with a capillary tube. The specific electronic expansion valve is the electronic expansion valve for throttling between the indoor heat exchanger and the outdoor heat exchanger of the air conditioner. In the related art, when the refrigerant passes through the electronic expansion valve for throttling, the throttling degree is different. Sometimes the throttling degree is large and the valve opening is small. The high-pressure and low-temperature refrigerant pulse will form a whistling sound when passing through the small opening of the electronic expansion valve and is transmitted through the pipeline. Due to the low frequency and strong penetration ability, it is especially easy to reproduce at 50-70 Hz. Mainly due to the current frequency, the resonance occurs between the refrigerant pulse frequency and the inherent frequency of the electronic expansion valve. In addition, when the outdoor ambient temperature is low and the indoor fan speed is low during heating, the overall load of the unit is large, and it is easier to generate a large refrigerant impact, the whistling sound is louder, and it is easier to generate abnormal noise.

[0033] Figure 1 It is a schematic diagram of a method of an embodiment of the control method for an air conditioner provided by the present invention.

[0034] As Figure 1 shown, according to an embodiment of the present invention, the control method for the air conditioner at least includes step S110, step S120, and step S130.

[0035] Step S110, after the air conditioner starts heating and runs, detect the outdoor ambient temperature, the compressor frequency of the air conditioner, and the indoor fan speed of the air conditioner.

[0036] Preferably, detect the outdoor ambient temperature, the compressor frequency of the air conditioner, and the indoor fan speed of the air conditioner after the air conditioner has been running for a preset time. After the air conditioner has been running for a preset time, the compressor frequency and the indoor fan speed tend to be stable, and the detected compressor frequency and indoor fan speed are relatively accurate.

[0037] For example, detect the outdoor ambient temperature T (unit: °C) after the air conditioner has been running for 2 minutes; detect the compressor frequency F after the air conditioner has been running for 2 minutes; detect the indoor fan speed V after the air conditioner has been running for 2 minutes.

[0038] Step S120, determine whether the outdoor ambient temperature is less than or equal to a preset temperature threshold, whether the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and whether the indoor fan speed is less than or equal to a preset speed threshold.

[0039] For example, the preset temperature threshold is N 0 , the first preset frequency threshold is M 1 , the second preset frequency threshold is M 2 , the preset speed threshold is Q 0 , determine whether T ≤ N is satisfied 0 and M 1 ≤ F ≤ M 2 and V ≤ Q 0 . The preset temperature threshold N 0 is, for example, 5 °C. The first preset frequency threshold is less than or equal to the lower limit value of the resonance frequency range of the compressor, and the second preset frequency threshold is greater than or equal to the upper limit value of the resonance frequency range of the compressor. For example, the resonance frequency range of the compressor is 50 Hz to 70 Hz, the first preset frequency threshold M1 is, for example, 45 Hz, and the second preset frequency threshold M2 is, for example, 75 Hz, that is, the resonance frequency range of the compressor is 45 Hz to 75 Hz, so that the first preset frequency threshold is less than the lower limit value of the resonance frequency range, and the second preset frequency threshold is slightly greater than the upper limit value of the resonance frequency, leaving a certain margin. The preset speed threshold is, for example, the speed corresponding to the low wind gear, for example, 600 RPM.

[0040] Step S130, if it is determined that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan speed is less than or equal to the preset speed threshold, then control the opening degree of the electronic expansion valve of the air conditioner to increase by a first preset opening value.

[0041] Specifically, when it is detected that T ≤ N 0 and M 1 ≤ F ≤ M 2 and V ≤ Q 0, when the temperature of the outer ring is low enough, the temperature difference is large, and a large amount of heat needs to be provided, but the whole machine cannot meet the requirement, the load of the whole machine is large. At the same time, when the frequency is between the first preset frequency threshold and the second preset frequency threshold, the indoor fan operates at a low speed in the low gear, and the indoor evaporator cannot meet the heat exchange requirement. The load of the whole machine reaches the maximum, and there will be abnormal noise in the whole machine. Then, the opening degree of the electronic expansion valve is controlled to increase by a first preset opening value. For example, the opening degree of the electronic expansion valve is increased by +100B to avoid the generation of abnormal noise. Although the throttling performance deteriorates when the opening degree of the electronic expansion valve increases, it can meet the heating requirement of the whole machine. In order to ensure comfort, a certain amount of heating capacity is sacrificed, but the increase in the opening degree can avoid the generation of abnormal noise.

[0042] Figure 2 It is a schematic diagram of another embodiment of the control method of the air conditioner provided by the present invention.

[0043] As Figure 2 shown, based on the above embodiments, according to another embodiment of the present invention, the control method of the air conditioner further includes step S140.

[0044] Step S140, if it is determined that the outdoor ambient temperature is greater than a preset temperature threshold, the compressor frequency is less than the first preset frequency threshold or greater than the second preset frequency threshold, and the indoor fan speed is greater than a preset speed threshold, then there is no need to adjust the opening degree of the electronic expansion valve of the air conditioner.

[0045] Specifically, when it is detected that T > N 0 and F < M 1 or F > M 2 and V > Q 0 , during heating, when the ambient temperature is relatively high, the air conditioner does not need to output a large amount of heat to meet the user's requirements. That is, when the temperature of the outer ring is high, the load of the whole machine is small, the temperature load during operation is small, the frequency operates below the first preset frequency threshold or above the second preset frequency threshold, not within the resonance frequency range. The abnormal noise spectrum generated by the refrigerant pulsation is not at the fixed frequency of the electronic expansion valve and will not resonate. The indoor fan speed is higher than the low gear and operates at a high speed. When the refrigerant flows through the evaporator at a high speed, the cold air can fully exchange heat with the refrigerant in the copper tube. The load of the whole machine is small, there is no abnormal noise in the whole machine, and the whole machine operates normally without adjusting the opening degree of the electronic expansion valve.

[0046] Figure 3 It is a schematic diagram of yet another embodiment of the control method of the air conditioner provided by the present invention.

[0047] As Figure 3 shown, based on any of the above embodiments, according to yet another embodiment of the present invention, the control method of the air conditioner further includes step S150 and / or step S160.

[0048] Step S150, if it is determined that the outdoor ambient temperature is greater than the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan speed is less than or equal to the preset speed threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a second preset opening value.

[0049] Specifically, when it is detected that T > N 0 and M 1 ≤ F ≤ M 2 and V ≤ Q 0 During heating, when the ambient temperature is relatively high, the air conditioner does not need to output a large amount of heat to meet the user's requirements. That is, when the outer ring temperature is high, the load of the whole machine is small. The frequency is set between the first preset frequency threshold and the second preset frequency threshold, and the indoor fan runs at a low speed in the low wind gear. The indoor evaporator cannot meet the heat exchange, and the load of the whole machine is high, but the temperature load is small, so the load of the whole machine also decreases. Although the frequency has approached or reached the resonance frequency, the load of the whole machine is small, and the possibility of generating abnormal noise is small. The whole machine operates normally without adjusting the opening of the electronic expansion valve. Or preferably, control the opening of the electronic expansion valve to increase by a second preset opening value to avoid the generation of abnormal noise. The first preset opening value is greater than the second preset opening value. For example, the first preset opening value is 100B, and the second preset opening value is 50B.

[0050] Step S160, if it is determined that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan speed is greater than the preset speed threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a third preset opening value, and the first preset opening value is greater than the third preset opening value.

[0051] Specifically, when it is detected that T ≤ N 0 and M 1 ≤ F ≤ M 2 and V > Q 0 When the outer ring temperature is relatively low, the temperature load is large. When the outer ring temperature is low enough and the temperature difference is large, more heat needs to be provided, but the whole machine cannot meet the requirement, and the load of the whole machine is large. The frequency is close to or reaches the resonance frequency, and the indoor fan speed runs at a high speed above the low wind gear. Although the frequency has approached or reached the resonance frequency, the heat exchange of the indoor unit is strong, and the load of the whole machine decreases. The possibility of generating abnormal noise is small. The whole machine operates normally without adjusting the opening of the electronic expansion valve. Or preferably, control the opening of the electronic expansion valve to increase by a third preset opening value to avoid the generation of abnormal noise. The first preset opening value is greater than the third preset opening value. For example, the first preset opening value is 100B, and the third preset opening value is 50B. The third preset opening value can be equal to the second preset opening value.

[0052] Optionally, if it is determined that the outdoor ambient temperature is greater than the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan speed is greater than the preset speed threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a fourth preset opening value. When it is detected that T > N 0 and M 1 ≤ F ≤ M 2 and V > Q 0 , during heating, when the ambient temperature is relatively high, the air conditioner does not need to output a large amount of heat to meet the user's requirements, that is, when the outer ring temperature is high, the load of the whole machine is small, the frequency is close to or reaches the resonance frequency (for example, between 45 Hz and 75 Hz), the indoor fan runs at a high speed higher than the low wind gear. Although the frequency has approached or reached the resonance frequency, the load of the whole machine is small, and the heat exchange of the indoor unit is strong, so the possibility of generating abnormal noise is small. The whole machine operates normally without adjusting the opening of the electronic expansion valve. Or preferably, control the opening of the electronic expansion valve to increase by a fourth preset opening value to avoid the generation of abnormal noise. The first preset opening value is greater than the fourth preset opening value. For example, the first preset opening value is 100 B, and the fourth preset opening value is 30 B. The third preset opening value may be equal to the second preset opening value. The fourth preset opening value is less than the second preset opening value, and the fourth preset opening value is less than the third preset opening value.

[0053] When the compressor frequency is less than the first preset frequency threshold or greater than the second preset frequency threshold, that is, outside the resonance frequency range, the possibility of generating abnormal noise is small, so there is no need to adjust the opening of the electronic expansion valve.

[0054] Optionally, the method further includes: receiving a control instruction to reduce the noise of the air conditioner; when receiving the control instruction, detecting whether the compressor frequency of the air conditioner is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold; if it is detected that the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a fourth preset opening value.

[0055] Specifically, receive a control instruction to reduce the noise of the air conditioner sent by the remote control or the control terminal. For example, the user can send a control instruction to reduce the noise of the air conditioner through the remote control, or send a control instruction to reduce the noise of the air conditioner through the control terminal (specifically, it may include a mobile terminal such as a mobile phone installed with a control client APP). When receiving the control instruction, detect whether the compressor frequency of the air conditioner is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold; if it is detected that the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, then control the opening of the electronic expansion valve of the air conditioner to increase by a fourth preset opening value to avoid the generation of abnormal noise.

[0056] To clearly illustrate the technical solution of the present invention, the execution process of the control method for the air conditioner provided by the present invention will be described below with a specific embodiment.

[0057] Figure 4 It is a schematic diagram of the method of a specific embodiment of the control method for the air conditioner provided by the present invention.

[0058] As Figure 4 shown, the air conditioner is turned on in the heating mode. The outdoor ambient temperature T, the compressor frequency F, and the indoor fan speed V of the whole machine are detected within 2 minutes. When it is detected that T > N 0 , and F < M 1 or F > M 2 , and V > Q 0 , during heating, when the ambient temperature is high, the air conditioner does not need to output a large amount of heat to meet the user's requirements, that is, when the ambient temperature is high, the load of the whole machine is small, the temperature load during operation is small, the frequency operates below the first preset frequency threshold (for example, 45 Hz) or above the second preset frequency threshold (for example, 75 Hz), not within the resonance frequency (for example, between 50 - 70 Hz). The abnormal noise spectrum generated by the refrigerant pulsation is not at the fixed frequency of the electronic expansion valve and will not resonate. The indoor fan speed is higher than the high speed of the low wind gear. When the refrigerant flows through the evaporator at a speed higher than the low wind gear, the high speed of the motor fan blades enables the cold air of the air to fully exchange heat with the refrigerant in the copper tube. The load of the whole machine is small, there is no abnormal noise in the whole machine, and the whole machine operates normally; when it is detected that T > N 0 and M 1 ≤F≤M 2 and V≤Q 0 , during heating, when the ambient temperature is high, the air conditioner does not need to output a large amount of heat to meet the user's requirements, that is, when the ambient temperature is high, the load of the whole machine is small, the frequency is close to or reaches the resonance frequency, the indoor fan is at a low speed in the low wind gear, and the indoor evaporator cannot meet the heat exchange. The load of the whole machine is high, but the temperature load is small, so the load of the whole machine is also reduced. Although the frequency has approached or reached the resonance frequency, the load of the whole machine is small and no abnormal noise is excited, and the whole machine operates normally; when it is detected that T≤N 0 and M 1 ≤F≤M 2 and V≤Q 0 , when the outer ring temperature is low enough, the temperature difference is large and more heat needs to be provided, but the whole machine cannot meet the requirement, the load of the whole machine is large, and at the same time the frequency is close to or reaches the resonance frequency, the indoor fan is at a low speed in the low wind gear, and the indoor evaporator cannot meet the heat exchange. The load of the whole machine reaches the maximum, and there will be abnormal noise in the whole machine. The electronic expansion valve of the whole machine is controlled to increase, for example, +100B, the throttling difference becomes larger, but it can meet the heating of the whole machine. In order to improve comfort, a certain amount of heating capacity is sacrificed, and the opening becomes larger to avoid the generation of abnormal noise. When it is detected that T≤N 0 and M 1≤F≤M 2 and V > Q 0 , the temperature load is large. When the temperature of the outer ring is low enough and the temperature difference is large, more heat needs to be provided, but the whole machine cannot meet the requirement. The load of the whole machine is large, and the frequency reaches the resonance frequency. The rotational speed of the indoor unit is higher than that of the low wind gear at high speed. However, the heat exchange of the indoor unit is strong, the load of the whole machine is reduced, and there is no abnormal noise in the whole machine, and the whole machine operates normally.

[0059] The present invention also provides a control device for an air conditioner.

[0060] This device is mainly used for split air conditioners. The device of the present invention is particularly applicable to the case where the electronic expansion valve is not connected in series with a capillary tube. The specific electronic expansion valve is the electronic expansion valve for throttling between the indoor heat exchanger and the outdoor heat exchanger of the air conditioner. In the related art, when the refrigerant passes through the electronic expansion valve for throttling, the throttling degree is different. Sometimes the throttling degree is large and the valve opening is small. The high-pressure and low-temperature refrigerant pulse will form a whistling sound when passing through the small opening of the electronic expansion valve and is transmitted through the pipeline. Due to the low frequency and strong penetration ability, it is particularly easy to reproduce at 50 - 70 Hz. This is mainly because the current frequency, the refrigerant pulse frequency and the natural frequency of the electronic expansion valve resonate. In addition, when the outside temperature is low during heating and the indoor fan speed is low, the load of the whole machine is large, and it is easier to generate a large refrigerant impact, the whistling sound is louder, and it is easier to generate abnormal noise.

[0061] Figure 5 is a structural block diagram of an embodiment of the control device for an air conditioner provided by the present invention. As Figure 5 shown, the control device 100 of the air conditioner includes: a detection unit 110, a judgment unit 120, and a control unit 130.

[0062] The detection unit 110 is configured to detect the outdoor ambient temperature, the compressor frequency of the air conditioner, and the rotational speed of the indoor fan of the air conditioner after the air conditioner starts to operate in heating mode.

[0063] Preferably, the outdoor ambient temperature, the compressor frequency of the air conditioner, and the rotational speed of the indoor fan of the air conditioner are detected after the air conditioner has been operating for a preset time. After the air conditioner has been operating for a preset time, the compressor frequency and the rotational speed of the indoor fan tend to be stable, and the detected compressor frequency and rotational speed of the indoor fan are more accurate.

[0064] For example, the outdoor ambient temperature T (unit: °C) is detected after the air conditioner has been operating for 2 minutes; the compressor frequency F is detected after the air conditioner has been operating for 2 minutes; the rotational speed V of the indoor fan is detected after the air conditioner has been operating for 2 minutes.

[0065] The judgment unit 120 is configured to judge whether the outdoor ambient temperature is less than or equal to a preset temperature threshold, whether the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and whether the rotational speed of the indoor fan is less than or equal to a preset rotational speed threshold.

[0066] For example, the preset temperature threshold is N 0 , the first preset frequency threshold is M 1 , the second preset frequency threshold is M 2 , the preset rotational speed threshold is Q 0 , determine whether T≤N 0 and M 1 ≤F≤M 2 and V≤Q 0 . The preset temperature threshold N 0 is, for example, 5°C. The first preset frequency threshold is less than or equal to the lower limit value of the resonance frequency range of the compressor, and the second preset frequency threshold is greater than or equal to the upper limit value of the resonance frequency range of the compressor. For example, the resonance frequency range of the compressor is 50Hz to 70Hz, and the first preset frequency threshold M 1 is, for example, 45Hz, and the second preset frequency threshold M 2 is, for example, 75Hz, that is, the resonance frequency range of the compressor is 45Hz to 75Hz, making the first preset frequency threshold less than the lower limit value of the resonance frequency range and the second preset frequency threshold slightly greater than the upper limit value of the resonance frequency range, leaving a certain margin. The preset rotational speed threshold is, for example, the rotational speed corresponding to the low fan speed gear, for example, 600 RPM.

[0067] The control unit 130 is configured to, if the judgment unit determines that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan rotational speed is less than or equal to the preset rotational speed threshold, then control the opening degree of the electronic expansion valve of the air conditioner to increase by a first preset opening value.

[0068] Specifically, when it is detected that T≤N 0 and M 1 ≤F≤M 2 and V≤Q 0 , when the outer ring temperature is low enough, the temperature difference is large, more heat needs to be provided, but the whole machine cannot meet the requirement, the load of the whole machine is large, and at the same time the frequency is between the first preset frequency threshold and the second preset frequency threshold, the indoor fan is at a low speed in the low fan speed gear, the indoor evaporator cannot meet the heat exchange, the load of the whole machine reaches the maximum, and there will be abnormal noise in the whole machine, then control the opening degree of the electronic expansion valve to increase by a first preset opening value. For example, the opening degree of the electronic expansion valve +100B to avoid the generation of abnormal noise. When the opening degree of the electronic expansion valve increases, the throttling becomes worse, but it can meet the heating of the whole machine. For the sake of comfort, a certain heating capacity is lost, and the increase in the opening degree avoids the generation of abnormal noise.

[0069] Optionally, based on the above embodiments, according to another embodiment of the present invention, the control unit 130 is further configured to: if the determination unit 120 determines that the outdoor ambient temperature is greater than a preset temperature threshold, the compressor frequency is less than a first preset frequency threshold or greater than a second preset frequency threshold, and the indoor fan speed is greater than a preset speed threshold, then there is no need to adjust the opening degree of the electronic expansion valve of the air conditioner.

[0070] Specifically, when it is detected that T > N 0 and F < M 1 or F > M 2 and V > Q 0 In heating mode, when the ambient temperature is relatively high, the air conditioner does not need to output a large amount of heat to meet the user's requirements. That is, when the outdoor temperature is high, the overall load of the machine is small, the temperature load during operation is small, the frequency operates below the first preset frequency threshold or above the second preset frequency threshold, not within the resonance frequency range. The abnormal noise spectrum generated by the refrigerant pulsation is not at the fixed frequency of the electronic expansion valve and will not resonate. The indoor fan speed is higher than the low wind speed and operates at a high speed. When the refrigerant flows through the evaporator at a high speed of the motor fan blade, the cold air can fully exchange heat with the refrigerant in the copper pipe. The overall load of the machine is small, there is no abnormal noise in the whole machine, and the whole machine operates normally without adjusting the opening degree of the electronic expansion valve.

[0071] Optionally, based on any of the above embodiments, according to another embodiment of the present invention, the control unit 130 is further configured to: if the determination unit 120 determines that the outdoor ambient temperature is greater than a preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the indoor fan speed is less than or equal to a preset speed threshold, then control the opening degree of the electronic expansion valve of the air conditioner to increase by a second preset opening value, where the first preset opening value is greater than the second preset opening value.

[0072] Specifically, when it is detected that T > N 0 and M 1 ≤ F ≤ M 2 and V ≤ Q 0, when heating and the ambient temperature is relatively high, the air conditioner does not need to output a large amount of heat to meet the user's requirements, that is, when the outer ring temperature is high, the load of the whole machine is small, the frequency is set between the first preset frequency threshold and the second preset frequency threshold, the indoor fan runs at a low speed in the low gear, the indoor evaporator cannot meet the heat exchange, the load of the whole machine is high, but the temperature load is small, so the load of the whole machine is also reduced. Although the frequency has approached or reached the resonance frequency, the load of the whole machine is small, and the possibility of generating abnormal noise is small. The whole machine operates normally without adjusting the opening degree of the electronic expansion valve. Or preferably, control the opening degree of the electronic expansion valve to increase by a second preset opening value to avoid the generation of abnormal noise. The first preset opening value is greater than the second preset opening value. For example, the first preset opening value is 100B, and the second preset opening value is 50B.

[0073] Optionally, according to another embodiment of the present invention, the control unit 130 is further configured to: if the judgment unit 120 judges that the outdoor ambient temperature is less than or equal to a preset temperature threshold, the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and the indoor fan speed is greater than a preset speed threshold, then control the opening degree of the electronic expansion valve of the air conditioner to increase by a third preset opening value, and the first preset opening value is greater than the third preset opening value.

[0074] Specifically, when it is detected that T≤N 0 and M 1 ≤F≤M 2 and V>Q 0 , the outer ring temperature is relatively low, the temperature load is large. When the outer ring temperature is low enough and the temperature difference is large, more heat needs to be provided, but the whole machine cannot meet it, the load of the whole machine is large, the frequency is close to or reaches the resonance frequency, and the indoor fan speed runs at a high speed higher than the low gear. Although the frequency has approached or reached the resonance frequency, the indoor heat exchange is strong, the load of the whole machine is reduced, and the possibility of generating abnormal noise is small. The whole machine operates normally without adjusting the opening degree of the electronic expansion valve. Or preferably, control the opening degree of the electronic expansion valve to increase by a third preset opening value to avoid the generation of abnormal noise. The first preset opening value is greater than the third preset opening value. For example, the first preset opening value is 100B, and the third preset opening value is 50B. The third preset opening value may be equal to the second preset opening value.

[0075] Optionally, if it is judged that the outdoor ambient temperature is greater than a preset temperature threshold, the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and the indoor fan speed is greater than a preset speed threshold, then control the opening degree of the electronic expansion valve of the air conditioner to increase by a fourth preset opening value. When it is detected that T>N 0 and M 1 ≤F≤M 2 and V>Q 0, when heating and the ambient temperature is relatively high, the air conditioner can meet the user's requirements without outputting a large amount of heat. That is, when the outer ring temperature is high, the load of the whole machine is small, and the frequency is close to or reaches the resonance frequency (for example, between 45 Hz and 75 Hz). The indoor fan operates at a speed higher than the low wind speed. Although the frequency has approached or reached the resonance frequency, the load of the whole machine is small, and the heat exchange of the indoor unit is strong, so the possibility of generating abnormal noise is small. The whole machine can operate normally without adjusting the opening degree of the electronic expansion valve. Or preferably, control the opening degree of the electronic expansion valve to increase by a fourth preset opening value to avoid the generation of abnormal noise. The first preset opening value is greater than the fourth preset opening value. For example, the first preset opening value is 100B, and the fourth preset opening value is 30B. The third preset opening value can be equal to the second preset opening value. The fourth preset opening value is less than the second preset opening value, and the fourth preset opening value is less than the third preset opening value.

[0076] When the compressor frequency is less than the first preset frequency threshold or greater than the second preset frequency threshold, that is, outside the resonance frequency range, the possibility of generating abnormal noise is small, so there is no need to adjust the opening degree of the electronic expansion valve.

[0077] Optionally, the device further includes: a receiving unit (not shown) for receiving a control instruction to reduce the noise of the air conditioner; the detection unit 110 is further configured to: when the receiving unit receives the control instruction, detect whether the compressor frequency of the air conditioner is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold; the control unit 130 is further configured to: if the detection unit 110 detects that the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, control the opening degree of the electronic expansion valve of the air conditioner to increase by a fourth preset opening value.

[0078] Specifically, receive a control instruction to reduce the noise of the air conditioner sent through a remote controller or a control terminal. For example, the user can send a control instruction to reduce the noise of the air conditioner through the remote controller, or send a control instruction to reduce the noise of the air conditioner through the control terminal (specifically, it can include a mobile terminal such as a mobile phone installed with a control client APP). When receiving the control instruction, the detection unit 110 detects whether the compressor frequency of the air conditioner is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold; if it is detected that the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, the control unit 130 controls the opening degree of the electronic expansion valve of the air conditioner to increase by a fourth preset opening value to avoid the generation of abnormal noise.

[0079] The present invention also provides a storage medium corresponding to the control method of the air conditioner, on which a computer program is stored, and when the program is executed by a processor, the steps of any one of the foregoing methods are implemented.

[0080] The present invention also provides an air conditioner corresponding to the control method of the air conditioner, including a processor, a memory, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of any of the foregoing methods are implemented.

[0081] The present invention also provides an air conditioner corresponding to the control device of the air conditioner, including the control device of any of the foregoing air conditioners.

[0082] The present invention also provides a computer program product corresponding to the control method of the air conditioner, including a computer program. When the computer program is executed by a processor, the steps of any of the foregoing methods are implemented.

[0083] Accordingly, in the solution provided by the present invention, when the air conditioner is in heating operation, by adjusting the opening degree of the electronic expansion valve, it is possible to avoid a small opening degree, so that the refrigerant with a small valve passes through the electronic expansion valve to generate abnormal noise, improve comfort, and enhance the user experience.

[0084] According to the technical solution of the present invention, in the split air conditioner electronic expansion valve system without a capillary tube system, by detecting the outdoor ambient temperature, the compressor frequency, and the indoor fan speed, when the detected outer ring temperature, the compressor speed, and the indoor unit speed reach a certain range value, the opening degree of the electronic expansion valve is adjusted to make the opening degree of the electronic expansion valve larger, so as to avoid a small opening degree, and the refrigerant with a small valve passes through the electronic expansion valve to generate abnormal noise, improve comfort, and enhance the user experience.

[0085] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on a computer-readable medium or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and embodiments are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. In addition, each functional unit can be integrated in one processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0086] In several embodiments provided by this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0087] The units described as separate components may or may not be physically separated. The components serving as control devices may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0088] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the related technology, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs, etc., which can store program codes.

[0089] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: include: After the air conditioner is turned on for heating, detecting the outdoor ambient temperature, the compressor frequency of the air conditioner, and the internal fan speed of the air conditioner; Determine whether the outdoor ambient temperature is less than or equal to a preset temperature threshold, whether the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and whether the internal fan speed is less than or equal to a preset speed threshold; If it is determined that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the internal fan speed is less than or equal to the preset speed threshold, the opening of the electronic expansion valve of the air conditioner is controlled to increase to a first preset opening value.

2. The method according to claim 1, characterized in that The electronic expansion valve of the air conditioner is not connected in series with a capillary tube.

3. The method according to claim 1, characterized in that Also includes: If it is determined that the outdoor ambient temperature is greater than a preset temperature threshold, the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and the internal fan speed is less than or equal to a preset speed threshold, then the opening of the electronic expansion valve of the air conditioner is controlled to increase by a second preset opening value, and the first preset opening value is greater than the second preset opening value; and / or, If it is determined that the outdoor ambient temperature is less than or equal to the preset temperature threshold, the compressor frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, and the internal fan speed is greater than the preset speed threshold, then the opening of the electronic expansion valve of the air conditioner is controlled to increase to a third preset opening value, and the first preset opening value is greater than the third preset opening value.

4. The method according to any one of claims 1 to 3, characterized in that: Also includes: If it is determined that the outdoor ambient temperature is greater than the preset temperature threshold, the compressor frequency is less than the first preset frequency threshold or greater than the second preset frequency threshold, and the internal fan speed is greater than the preset speed threshold, there is no need to adjust the opening of the electronic expansion valve of the air conditioner.

5. The method according to any one of claims 1 to 3, characterized in that: The first preset frequency threshold is less than or equal to a lower limit value of a resonance frequency range of the compressor, and the second preset frequency threshold is greater than or equal to an upper limit value of the resonance frequency range of the compressor.

6. The method according to any one of claims 1 to 3, characterized in that: Also includes: receiving a control instruction to reduce the noise of the air conditioner; When receiving the control instruction, detecting whether the compressor frequency of the air conditioner is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold; If it is detected that the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, the opening of the electronic expansion valve of the air conditioner is controlled to increase to a fourth preset opening value.

7. A control device for an air conditioner, characterized in that: include: A detection unit, used to detect the outdoor ambient temperature, the compressor frequency of the air conditioner and the internal fan speed of the air conditioner after the air conditioner is turned on for heating; a judgment unit, configured to judge whether the outdoor ambient temperature is less than or equal to a preset temperature threshold, whether the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and whether the internal fan speed is less than or equal to a preset speed threshold; A control unit is used to control the opening of the electronic expansion valve of the air conditioner to increase the first preset opening value if the judgment unit determines that the outdoor ambient temperature is less than or equal to a preset temperature threshold, the compressor frequency is greater than or equal to a first preset frequency threshold and less than or equal to a second preset frequency threshold, and the internal fan speed is less than or equal to a preset speed threshold.

8. A storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the steps of any method described in claims 1-6 are implemented.

9. An air conditioner, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any method described in claims 1 to 6 when executing the program, or comprises the control device described in claim 7.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of any one of the methods of claims 1 to 6 when executed by a processor.

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