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

Abstract

The invention provides an air conditioner and a control method and device thereof, a storage medium and a computer program product. The method comprises the steps that the indoor environment temperature, the outdoor environment temperature and the indoor heat exchanger temperature and the outdoor heat exchanger temperature of the air conditioner are collected; and the minimum opening degree of a throttling device of the air conditioner is determined according to the collected indoor environment temperature, outdoor environment temperature, indoor heat exchanger temperature and outdoor heat exchanger temperature, and minimum opening degree control over the throttling device is executed according to the determined minimum opening degree. The scheme provided by the invention can adapt to different working condition requirements and guarantee the reliability of the system.

Description

Technical Field

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

[0002] Most household air conditioners use electronic expansion valves as throttling devices. The minimum opening control method of the electronic expansion valve in related technologies is relatively simple. Basically, an opening value is selected as the minimum opening based on the electronic expansion valve parameters provided by the manufacturer. When the opening of the electronic expansion valve is controlled, the opening of the electronic expansion valve cannot be less than the minimum opening. This control method is simple but is prone to unstable system operation and reliability issues. 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 unstable system operation caused by the minimum opening control of the throttling device in the related technologies.

[0004] On the one hand, the present invention provides a method for controlling an air conditioner, comprising: collecting indoor ambient temperature, outdoor ambient temperature, and indoor heat exchanger temperature and outdoor heat exchanger temperature of the air conditioner; determining the minimum opening of a throttling device of the air conditioner based on the collected indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature, and outdoor heat exchanger temperature, so as to perform minimum opening control of the throttling device based on the determined minimum opening.

[0005] Optionally, determining the minimum opening of the throttling device of the air conditioner according to the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, and outdoor heat exchanger temperature includes:

[0006] In cooling mode, the minimum opening of the throttling device P 制冷模式 According to the following linear fitting relationship, P 制冷模式 =A*T 外环 +B*T 外管 +C

[0007] Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature, A, B, and C are fitting coefficients, A is the weight coefficient corresponding to the outdoor ambient temperature, B is the weight coefficient corresponding to the outdoor heat exchanger temperature, and C is the compensation coefficient in cooling mode; and / or,

[0008] In heating mode, the minimum opening of the throttling device P制热模式 According to the following linear fitting relationship:

[0009] P 制热模式 =D*T 内环 +E*T 内管 +F

[0010] Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature. D, E, and F are fitting coefficients. D is the weight coefficient corresponding to the indoor ambient temperature, E is the weight coefficient corresponding to the indoor heat exchanger temperature, and F is the compensation coefficient in heating mode.

[0011] Optionally, the fitting coefficients A, B, and C are determined according to the temperature range to which the outdoor ambient temperature belongs in the outdoor ambient temperature range under two or more preset cooling modes, wherein different outdoor ambient temperature ranges correspond to different fitting coefficients A, B, and C; and / or, the fitting coefficients D, E, and F are determined according to the temperature range to which the outdoor ambient temperature belongs in the outdoor ambient temperature range under two or more preset heating modes, wherein different outdoor ambient temperature ranges correspond to different fitting coefficients D, E, and F.

[0012] Optionally, it also includes: real-time collection of indoor ambient temperature, outdoor ambient temperature, and the indoor heat exchanger temperature and outdoor heat exchanger temperature of the air conditioner; adjusting the opening of the throttling device according to the compressor frequency of the air conditioner and the collected indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature and outdoor heat exchanger temperature.

[0013] Optionally, it also includes: after adjusting the opening of the throttling device, judging whether the opening change value of the adjusted opening relative to the opening before adjustment is within a preset range; if it is judged that the opening change value is within the preset range, performing preset control on the opening of the throttling device.

[0014] Optionally, a preset control is performed on the opening of the throttling device, including: adjusting the opening of the throttling device according to the opening change rate of the adjusted opening relative to the opening before adjustment; wherein, the opening adjustment value is determined according to the opening change rate, and the adjusted opening value of the throttling device is determined according to the sum of the current opening value of the throttling device and the opening adjustment value.

[0015] Optionally, determining the opening adjustment value based on the opening change rate includes: determining whether the correlation between the opening adjustment value and the opening change rate is positively correlated or negatively correlated; determining the opening adjustment value based on the interval to which the opening change rate belongs in two or more preset change rate intervals and the determined correlation.

[0016] Optionally, it also includes: collecting the indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, outdoor heat exchanger temperature, compressor operating frequency and corresponding fitting coefficients when the air conditioner is running as sample data for model training; using the indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, outdoor heat exchanger temperature and compressor operating frequency in the sample data as input data, and the fitting coefficient as model output data, to perform neural network model training to obtain a fitting coefficient determination model.

[0017] On the other hand, the present invention provides a control device for an air conditioner, comprising: a first acquisition unit for acquiring indoor ambient temperature, outdoor ambient temperature, and the indoor heat exchanger temperature and outdoor heat exchanger temperature of the air conditioner; a determination unit for determining the minimum opening of the throttling device of the air conditioner based on the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature, and outdoor heat exchanger temperature acquired by the acquisition unit, so as to perform minimum opening control of the throttling device based on the determined minimum opening.

[0018] Optionally, the determining unit determines the minimum opening of the throttling device of the air conditioner according to the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature and outdoor heat exchanger temperature, including: in cooling mode, the minimum opening of the throttling device P 制冷模式 According to the following linear fitting relationship:

[0019] P 制冷模式 =A*T 外环 +B*T 外管 +C

[0020] Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature, A, B, and C are fitting coefficients, A is the weight coefficient corresponding to the outdoor ambient temperature, B is the weight coefficient corresponding to the outdoor heat exchanger temperature, and C is the compensation coefficient in cooling mode; and / or,

[0021] In heating mode, the minimum opening of the throttling device P 制热模式 According to the following linear fitting relationship:

[0022] P 制热模式=D*T 内环 +E*T 内管 +F

[0023] Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature. D, E, and F are fitting coefficients. D is the weight coefficient corresponding to the indoor ambient temperature, E is the weight coefficient corresponding to the indoor heat exchanger temperature, and F is the compensation coefficient in heating mode.

[0024] Optionally, the fitting coefficients A, B, and C are determined according to the temperature range to which the outdoor ambient temperature belongs in the outdoor ambient temperature range under two or more preset cooling modes, wherein different outdoor ambient temperature ranges correspond to different fitting coefficients A, B, and C; and / or, the fitting coefficients D, E, and F are determined according to the temperature range to which the outdoor ambient temperature belongs in the outdoor ambient temperature range under two or more preset heating modes, wherein different outdoor ambient temperature ranges correspond to different fitting coefficients D, E, and F.

[0025] Optionally, the collection unit is also used to: collect the indoor ambient temperature, outdoor ambient temperature, and the indoor heat exchanger temperature and outdoor heat exchanger temperature of the air conditioner in real time; the device also includes: an adjustment unit for adjusting the opening of the throttling device according to the compressor frequency of the air conditioner and the collected indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature and outdoor heat exchanger temperature.

[0026] Optionally, it also includes: a judgment unit, which is used to judge whether the opening change value of the adjusted opening relative to the opening before adjustment is within a preset range after the adjustment unit adjusts the opening of the throttling device; and a control unit, which is used to perform preset control on the opening of the throttling device if the judgment unit judges that the opening change value is within the preset range.

[0027] Optionally, the control unit performs preset control on the opening of the throttling device, including: adjusting the opening of the throttling device according to the opening change rate of the adjusted opening relative to the opening before adjustment; wherein, the opening adjustment value is determined according to the opening change rate, and the adjusted opening value of the throttling device is determined according to the sum of the current opening value of the throttling device and the opening adjustment value.

[0028] Optionally, the control unit determines the opening adjustment value based on the opening change rate, including: determining whether the correlation between the opening adjustment value and the opening change rate is positively correlated or negatively correlated; determining the opening adjustment value based on the interval to which the opening change rate belongs in two or more preset change rate intervals and the determined correlation.

[0029] Optionally, it also includes: a collection unit, used to collect fitting coefficients under different indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, outdoor heat exchanger temperatures and compressor operating frequencies when executing the minimum opening control of the throttling device, as sample data for model training; a model training unit, used to use the different indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, outdoor heat exchanger temperatures and compressor operating frequencies as model input data, and the fitting coefficients as model output data, to perform neural network model training and obtain a fitting coefficient output model.

[0030] Another aspect of the present invention provides a storage medium having a computer program stored thereon, wherein the program implements the steps of any of the aforementioned methods when executed by a processor.

[0031] In another aspect, the present invention provides an air conditioner, comprising 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 of the aforementioned methods when executing the program.

[0032] In another aspect, the present invention provides an air conditioner comprising any of the aforementioned control devices.

[0033] In another aspect, the present invention provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0034] According to the technical solution of the present invention, the minimum opening of the throttling device is determined according to the indoor and outdoor ambient temperatures and the indoor and outdoor heat exchanger temperatures. The minimum opening of the throttling device can be determined according to the actual operating status of the air conditioner, thereby accurately controlling the refrigerant flow, adapting to different working conditions, improving system efficiency, and ensuring system reliability.

[0035] According to the technical solution of the present invention, the throttling device opening is adjusted according to the real-time collection of indoor and outdoor ambient temperatures, indoor and outdoor heat exchanger temperatures and compressor frequency, which can achieve dynamic adjustment of the throttling device opening, maintain system stability, and improve comfort and efficiency.

[0036] According to the technical solution of the present invention, machine learning is applied to optimize the control strategy, so that the system can automatically adapt to the changing environment and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary 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:

[0038] Figure 1 1 is a method diagram of an embodiment of the air conditioner control method provided by the present invention;

[0039] Figure 2 is a method diagram of another embodiment of the air conditioner control method provided by the present invention;

[0040] Figure 3 1 is a method diagram of another embodiment of the air conditioner control method provided by the present invention;

[0041] Figure 4 The fuzzy control strategy flow is shown;

[0042] Figure 5 1 is a method diagram of yet another embodiment of the air conditioner control method provided by the present invention;

[0043] Figure 6 A schematic diagram of a big data model according to the present invention is shown;

[0044] Figure 7 This is a structural block diagram of an embodiment of the air conditioner control device provided by the present invention;

[0045] Figure 8 is a structural block diagram of another embodiment of the air conditioner control device provided by the present invention;

[0046] Figure 9 This is a structural block diagram of another embodiment of the air conditioner control device provided by the present invention;

[0047] Figure 10 It is a structural block diagram of another embodiment of the air conditioner control device provided by the present invention. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] In related technologies, the control method of the electronic expansion valve of the air-conditioning system is relatively simple. When the electronic expansion valve is opened to the minimum, problems such as system instability, insufficient control accuracy, delayed response and high energy consumption may occur. Ultimately, system problems such as reliability and noise may be more likely to occur.

[0051] The invention provides a method for controlling an air conditioner.

[0052] Figure 1 1 is a schematic diagram of an embodiment of the air conditioner control method provided by the present invention.

[0053] like Figure 1 As shown, according to one embodiment of the present invention, the air conditioner control method includes at least step S110 and step S120.

[0054] Step S110 , when the air conditioner is turned on, collecting the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger temperature and the outdoor heat exchanger temperature of the air conditioner.

[0055] Specifically, during the power-on phase of the air conditioner, the indoor ambient temperature T 内环 , indoor heat exchanger temperature (i.e. evaporator temperature, specifically indoor heat exchanger tube temperature) T 内管 and indoor ambient temperature T 外环 , outdoor heat exchanger temperature (i.e. condenser temperature, specifically outdoor heat exchanger tube temperature) T 外管 .

[0056] Step S120, determining the minimum opening of the throttling device of the air conditioner based on the collected indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature and outdoor heat exchanger temperature, and performing minimum opening control of the throttling device based on the determined minimum opening.

[0057] Specifically, the throttling device can be controlled to a minimum opening when the air-conditioning system is running at the start-up moment, shuts down when the set temperature is reached, or the difference between the indoor ambient temperature and the air-conditioning set temperature is less than the preset temperature value (that is, the difference between the indoor ambient temperature and the set temperature is small, and the required heat exchange amount is small). The throttling device can specifically be an electronic expansion valve.

[0058] In a specific embodiment, in the cooling mode, the minimum opening of the throttling device P 制冷模式 According to the following linear fitting relationship:

[0059] P 制冷模式 =A*T 外环 +B*T 外管 +C

[0060] Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature, A, B, and C are fitting coefficients, A is the weight coefficient corresponding to the outdoor ambient temperature, and the unit is, for example, step / degree Celsius, B is the weight coefficient corresponding to the outdoor heat exchanger temperature, and the unit is, for example, step / degree Celsius, and C is the compensation coefficient in cooling mode, which is consistent with the unit of the throttling device opening. The fitting coefficients A, B, and C can be obtained through experimental fitting.

[0061] In cooling mode, the higher the outdoor ambient temperature, the higher the required cooling capacity, and the need to improve the outdoor unit's heat exchange efficiency. Therefore, increasing the minimum opening can increase the refrigerant flow rate, thereby improving heat exchange efficiency. In other words, the higher the outdoor ambient temperature, the larger the above-mentioned fitting coefficients A, B, and C.

[0062] In one specific embodiment, the fitting coefficients A, B, and C in cooling mode are determined based on the temperature range to which the outdoor ambient temperature falls within one of two or more preset outdoor ambient temperature ranges in cooling mode. Different outdoor ambient temperature ranges correspond to different fitting coefficients A, B, and C. For example, Table 1 shows a specific example of a table of correspondence between outdoor ambient temperature ranges and fitting coefficients in cooling mode.

[0063] Table 1

[0064]

[0065] In Table 1, the values ​​of weight coefficients A1, A2, A3, and A4 are all positive and increase in sequence, the values ​​of weight coefficients B1, B2, B3, and B4 are all positive and increase in sequence, and the values ​​of compensation coefficients C1, C2, C3, and C4 are all positive and increase in sequence.

[0066] The value ranges of the above-mentioned fitting coefficients A, B, and C are, for example: A=1-2 (unit: step / degree Celsius), B=0.5-1 (unit: step / degree Celsius), and C=10-40 (unit: step).

[0067] In a specific embodiment, in the heating mode, the minimum opening of the throttling device P 制热模式 According to the following linear fitting relationship:

[0068] P 制热模式 =D*T 内环 +E*T 内管 +F

[0069] Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature, D, E, and F are fitting coefficients, D is the weight coefficient corresponding to the indoor ambient temperature, and the unit is, for example, step / degree Celsius, E is the weight coefficient corresponding to the indoor heat exchanger temperature, and the unit is, for example, step / degree Celsius, and F is the compensation coefficient in the heating mode, which is consistent with the unit of the throttling device opening. The fitting coefficients D, E, and F can be obtained through experimental fitting.

[0070] In heating mode, the lower the outdoor ambient temperature, the higher the required heating capacity, and the need to improve the outdoor unit's heat exchange efficiency. Therefore, increasing the minimum opening can increase the refrigerant flow rate, thereby improving heat exchange efficiency. In other words, the lower the outdoor ambient temperature, the larger the above fitting coefficients D, E, and F.

[0071] In one specific embodiment, the fitting coefficients D, E, and F in the heating mode are determined based on the temperature range to which the outdoor ambient temperature falls within one of two or more preset outdoor ambient temperature ranges in the heating mode. Different outdoor ambient temperature ranges correspond to different fitting coefficients D, E, and F. For example, Table 2 shows a specific example of a table of correspondence between outdoor ambient temperature ranges and fitting coefficients in the heating mode.

[0072] Table 2

[0073]

[0074] In Table 2, the values ​​of weight coefficients D1, D2, D3, and D4 are all positive and increase in sequence, the values ​​of weight coefficients E1, E2, E3, and E4 are all positive and increase in sequence, and the values ​​of compensation coefficients F1, F2, F3, and F4 are all positive and increase in sequence.

[0075] The value ranges of the above fitting parameters D, E, and F are, for example: E=1-2 (unit: step / degree Celsius), E=0.5-1 (unit: step / degree Celsius), and F=10-40 (unit: step).

[0076] After determining the minimum opening of the throttling device, when the opening of the throttling device (such as an electronic expansion valve) is controlled, the opening of the throttling device cannot be less than the minimum opening, that is, the minimum opening control is performed.

[0077] Figure 2 2 is a method diagram of another embodiment of the air conditioner control method provided by the present invention.

[0078] like Figure 2 As shown, according to another embodiment of the present invention, the air conditioner control method further includes step S130 and step S140.

[0079] Step S130 , collecting the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger temperature and the outdoor heat exchanger temperature of the air conditioner in real time.

[0080] Step S140: adjusting the opening of the throttling device according to the compressor frequency of the air conditioner and the collected indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature, and outdoor heat exchanger temperature.

[0081] Specifically, the indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature and outdoor heat exchanger temperature are collected in real time, and based on the compressor frequency of the air conditioner and the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature and outdoor heat exchanger temperature, the optimal opening of the throttling device (i.e., the adjusted opening of the throttling device) is calculated in real time, and the opening of the throttling device is adjusted according to the calculated optimal opening, that is, the opening of the throttling device is adjusted to the optimal opening.

[0082] In a specific embodiment, the adjusted opening degree P of the throttling device is calculated according to the following equation based on the compressor frequency of the air conditioner and the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, and outdoor heat exchanger temperature:

[0083] d 2 P / dt 2 =

[0084] a1*f+a2*df / dt+a3*P+a4*dP / dt+a5*T 内环 +a6*T 内管 +a7*T 外环 +a8*T 外管

[0085] Among them, f represents the compressor frequency, P represents the opening of the throttling device, and a1-a8 are weight coefficients, which can be obtained by fitting experimental data.

[0086] In another specific embodiment, the adjusted throttling device opening is determined based on the air conditioner compressor frequency and the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, and outdoor heat exchanger temperature, as well as preset correspondences between different compressor frequencies, indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, and outdoor heat exchanger temperatures and different throttling device openings. The correspondences may specifically be a table of correspondences between different compressor frequencies, indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, and outdoor heat exchanger temperatures and different throttling device openings.

[0087] Figure 3 This is a method diagram of another embodiment of the air conditioner control method provided by the present invention.

[0088] like Figure 3 As shown, based on the above embodiment, according to another embodiment of the present invention, the air conditioner control method further includes step S150 and step S160.

[0089] Step S150: After adjusting the opening of the throttling device, it is determined whether a change in the opening after adjustment relative to the opening before adjustment is within a preset range.

[0090] Specifically, after adjusting the opening of the throttling device, the size of the opening change value ΔS of the adjusted opening value relative to the opening value before adjustment is calculated to determine whether the opening change value is within a preset range, for example, whether -4<ΔS<4 is satisfied, unit: step.

[0091] In step S160 , if it is determined that the change in the opening degree after adjustment relative to the opening degree before adjustment is within a preset range, a preset control is performed on the opening degree of the throttling device.

[0092] Specifically, if it is determined that the opening change value of the adjusted opening value relative to the opening value before adjustment is not within the preset range, the original control method is followed; if it is determined that the opening change value of the adjusted opening value relative to the opening value before adjustment is within the preset range, the preset control is performed on the opening of the throttling device.

[0093] In a specific embodiment, the preset control is performed on the opening of the throttling device, including: controlling the opening of the throttling device according to the opening change rate of the adjusted opening relative to the opening before the adjustment. The opening adjustment value is determined according to the opening change rate, and the opening value of the throttling device after the preset control is equal to the sum of the current opening value of the throttling device and the opening adjustment value. That is, the opening of the throttling device is controlled to be P=P当前 +ΔP,P 当前 is the current opening value of the throttling device, and ΔP is the opening adjustment value.

[0094] In one specific embodiment, determining the opening adjustment value ΔP based on the opening change rate includes: determining whether the correlation between the opening adjustment value and the opening change rate is positively correlated or negatively correlated; and determining the opening adjustment value ΔP based on the interval to which the opening change rate belongs in one or more preset change rate intervals and the determined correlation. If the opening change value ΔS is a positive value, the correlation is positive; if the opening change value ΔS is a negative value, the correlation is negative.

[0095] For example, Table 3 shows the correspondence between different change rate intervals and opening adjustment values ​​in the case of positive and negative correlation, where d(ΔS) / d(t) represents the opening change rate after adjustment relative to the opening before adjustment.

[0096] Table 3

[0097]

[0098] Figure 4 The fuzzy control strategy flow is shown in Figure 2. Figure 4 As shown, after adjusting the opening of the throttling device, the size of the opening change value ΔS of the adjusted opening value relative to the opening value before adjustment is detected to determine whether the opening change value satisfies -4<ΔS<4, unit: step. If not, the original operation mode is maintained. If satisfied, fuzzy control is entered to control through the d(ΔS) / d(t) change rate, and feedback adjustment is performed according to the range of d(ΔS) / d(t).

[0099] Figure 5 2 is a method diagram of another embodiment of the air conditioner control method provided by the present invention.

[0100] like Figure 5 As shown, according to another embodiment of the present invention, the air conditioner control method further includes step S170 and step S180.

[0101] Step S170, collecting fitting coefficients under different indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, outdoor heat exchanger temperatures, and compressor operating frequencies when performing minimum opening control of the throttling device as sample data for model training;

[0102] Step S180, using the different indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, outdoor heat exchanger temperatures and compressor operating frequencies as model input data, and the fitting coefficients as model output data, to perform neural network model training and obtain a fitting coefficient output model.

[0103] Specifically, by analyzing a large amount of operating data, relevant data is recorded under different operating conditions (inner loop, outer loop) and different system parameters (evaporator inner tube temperature, condenser outer tube temperature, compressor operating frequency). This data is organized and trained as basic data, integrated through a neural network, and the fitting coefficients of the basic corresponding parameters are calculated. The neural network is then embedded into the entire machine control system. The current operating status of the air conditioner is determined by calibrating the big data basic model. After restarting, the air conditioner will be operated at the minimum opening under the corresponding operating conditions last time. The value of the fitting coefficient can be determined through the fitting process and then imported into the database.

[0104] Figure 6 Schematic diagram of the big data model according to the present invention is shown. Figure 6 As mentioned above, input the indoor ambient temperature T 内环 , outdoor ambient temperature T 外环 , indoor heat exchanger temperature T 内管 , outdoor heat exchanger temperature T 外管 and the compressor operating frequency f, and output the corresponding fitting coefficient for minimum opening calculation.

[0105] The invention also provides a control device for an air conditioner.

[0106] Figure 7 FIG. 1 is a structural block diagram of an embodiment of the air conditioner control device provided by the present invention. Figure 7 As shown, the control device 100 includes: a first acquisition unit 110 and a determination unit 120 .

[0107] The first collecting unit 110 is used to collect the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger temperature and the outdoor heat exchanger temperature of the air conditioner.

[0108] Specifically, during the power-on phase of the air conditioner, the indoor ambient temperature T 内环 , indoor heat exchanger temperature (i.e. evaporator temperature, specifically indoor heat exchanger tube temperature) T 内管 and indoor ambient temperature T 外环 , outdoor heat exchanger temperature (i.e. condenser temperature, specifically outdoor heat exchanger tube temperature) T 外管 .

[0109] The determination unit 120 is used to determine the minimum opening of the throttling device of the air conditioner based on the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature and outdoor heat exchanger temperature collected by the collection unit, so as to perform minimum opening control of the throttling device according to the determined minimum opening.

[0110] Specifically, the throttling device can be controlled to a minimum opening when the air-conditioning system is running at the start-up moment, shuts down when the set temperature is reached, or the difference between the indoor ambient temperature and the air-conditioning set temperature is less than the preset temperature value (that is, the difference between the indoor ambient temperature and the set temperature is small, and the required heat exchange amount is small). The throttling device can specifically be an electronic expansion valve.

[0111] In a specific embodiment, in the cooling mode, the minimum opening of the throttling device P 制冷模式 According to the following linear fitting relationship:

[0112] P 制冷模式 =A*T 外环 +B*T 外管 +C

[0113] Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature, A, B, and C are fitting coefficients, A is the weight coefficient corresponding to the outdoor ambient temperature, and the unit is, for example, step / degree Celsius, B is the weight coefficient corresponding to the outdoor heat exchanger temperature, and the unit is, for example, step / degree Celsius, and C is the compensation coefficient in cooling mode, which is consistent with the unit of the throttling device opening. The fitting coefficients A, B, and C can be obtained through experimental fitting.

[0114] In cooling mode, the higher the outdoor ambient temperature, the higher the required cooling capacity, and the need to improve the outdoor unit's heat exchange efficiency. Therefore, increasing the minimum opening can increase the refrigerant flow rate, thereby improving heat exchange efficiency. In other words, the higher the outdoor ambient temperature, the larger the above-mentioned fitting coefficients A, B, and C.

[0115] In one specific embodiment, the fitting coefficients A, B, and C in cooling mode are determined based on the temperature range to which the outdoor ambient temperature falls within one of two or more preset outdoor ambient temperature ranges in cooling mode. Different outdoor ambient temperature ranges correspond to different fitting coefficients A, B, and C. For example, Table 1 shows a specific example of a table of correspondence between outdoor ambient temperature ranges and fitting coefficients in cooling mode.

[0116] Table 1

[0117]

[0118] In Table 1, the values ​​of weight coefficients A1, A2, A3, and A4 are all positive and increase in sequence, the values ​​of weight coefficients B1, B2, B3, and B4 are all positive and increase in sequence, and the values ​​of compensation coefficients C1, C2, C3, and C4 are all positive and increase in sequence.

[0119] The value ranges of the above-mentioned fitting coefficients A, B, and C are, for example: A=1-2 (unit: step / degree Celsius), B=0.5-1 (unit: step / degree Celsius), and C=10-40 (unit: step).

[0120] In a specific embodiment, in the heating mode, the minimum opening of the throttling device P 制热模式 According to the following linear fitting relationship:

[0121] P 制热模式 =D*T 内环 +E*T 内管 +F

[0122] Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature, D, E, and F are fitting coefficients, D is the weight coefficient corresponding to the indoor ambient temperature, and the unit is, for example, step / degree Celsius, E is the weight coefficient corresponding to the indoor heat exchanger temperature, and the unit is, for example, step / degree Celsius, and F is the compensation coefficient in the heating mode, which is consistent with the unit of the throttling device opening. The fitting coefficients D, E, and F can be obtained through experimental fitting.

[0123] In heating mode, the lower the outdoor ambient temperature, the higher the required heating capacity, and the need to improve the outdoor unit's heat exchange efficiency. Therefore, increasing the minimum opening can increase the refrigerant flow rate, thereby improving heat exchange efficiency. In other words, the lower the outdoor ambient temperature, the larger the above fitting coefficients D, E, and F.

[0124] In one specific embodiment, the fitting coefficients D, E, and F in the heating mode are determined based on the temperature range to which the outdoor ambient temperature falls within one of two or more preset outdoor ambient temperature ranges in the heating mode. Different outdoor ambient temperature ranges correspond to different fitting coefficients D, E, and F. For example, Table 2 shows a specific example of a table of correspondence between outdoor ambient temperature ranges and fitting coefficients in the heating mode.

[0125] Table 2

[0126]

[0127] In Table 2, the values ​​of weight coefficients D1, D2, D3, and D4 are all positive and increase in sequence, the values ​​of weight coefficients E1, E2, E3, and E4 are all positive and increase in sequence, and the values ​​of compensation coefficients F1, F2, F3, and F4 are all positive and increase in sequence.

[0128] The value ranges of the above fitting parameters D, E, and F are, for example: E=1-2 (unit: step / degree Celsius), E=0.5-1 (unit: step / degree Celsius), and F=10-40 (unit: step).

[0129] After determining the minimum opening of the throttling device, when the opening of the throttling device (such as an electronic expansion valve) is controlled, the opening of the throttling device cannot be less than the minimum opening, that is, the minimum opening control is performed.

[0130] Figure 8 FIG. 1 is a structural block diagram of another embodiment of the air conditioner control device provided by the present invention. Figure 8 As shown, based on the above embodiment, according to another embodiment of the present invention, the control device 100 further includes: an adjustment unit 130.

[0131] The acquisition unit 110 is further configured to collect real-time indoor ambient temperature, outdoor ambient temperature, and indoor and outdoor heat exchanger temperatures of the air conditioner. The adjustment unit 130 is configured to adjust the opening of the throttling device based on the compressor frequency of the air conditioner and the collected indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature, and outdoor heat exchanger temperature.

[0132] Specifically, the indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature and outdoor heat exchanger temperature are collected in real time, and based on the compressor frequency of the air conditioner and the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature and outdoor heat exchanger temperature, the optimal opening of the throttling device (i.e., the adjusted opening of the throttling device) is calculated in real time, and the opening of the throttling device is adjusted according to the calculated optimal opening, that is, the opening of the throttling device is adjusted to the optimal opening.

[0133] In a specific embodiment, the adjusted opening degree P of the throttling device is calculated according to the following equation based on the compressor frequency of the air conditioner and the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, and outdoor heat exchanger temperature:

[0134] d 2 P / dt 2 =

[0135] a1*f+a2*df / dt+a3*P+a4*dP / dt+a5*T 内环 +a6*T 内管 +a7*T 外环 +a8*T外管

[0136] Among them, f represents the compressor frequency, P represents the opening of the throttling device, and a1-a8 are weight coefficients, which can be obtained by fitting experimental data.

[0137] In another specific embodiment, the adjusted throttling device opening is determined based on the air conditioner compressor frequency and the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, and outdoor heat exchanger temperature, as well as preset correspondences between different compressor frequencies, indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, and outdoor heat exchanger temperatures and different throttling device openings. The correspondences may specifically be a table of correspondences between different compressor frequencies, indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, and outdoor heat exchanger temperatures and different throttling device openings.

[0138] Figure 9 FIG. 1 is a structural block diagram of another embodiment of the air conditioner control device provided by the present invention. Figure 9 As shown, based on the above embodiment, the control device 100 further includes: a judgment unit 150 and a control unit 160 .

[0139] The judging unit 150 is configured to judge whether a change in the opening degree after adjustment relative to the opening degree before adjustment is within a preset range after the adjusting unit 130 adjusts the opening degree of the throttling device.

[0140] Specifically, after adjusting the opening of the throttling device, the size of the opening change value ΔS of the adjusted opening value relative to the opening value before adjustment is calculated to determine whether the opening change value is within a preset range, for example, whether -4<ΔS<4 is satisfied, unit: step.

[0141] The control unit 160 is configured to perform preset control on the opening of the throttling device if the judgment unit 150 judges that the opening change value is within the preset range.

[0142] Specifically, if it is determined that the opening change value of the adjusted opening value relative to the opening value before adjustment is not within the preset range, the original control method is followed; if it is determined that the opening change value of the adjusted opening value relative to the opening value before adjustment is within the preset range, the preset control is performed on the opening of the throttling device.

[0143] In a specific embodiment, the control unit 150 performs a preset control on the opening of the throttling device, including: controlling the opening of the throttling device according to the opening change rate of the adjusted opening relative to the opening before adjustment. The opening adjustment value is determined according to the opening change rate, and the opening value of the throttling device after performing the preset control is equal to the sum of the current opening value of the throttling device and the opening adjustment value. That is, the opening of the throttling device is controlled to be P=P 当前 +ΔP,P 当前 is the current opening value of the throttling device, and ΔP is the opening adjustment value.

[0144] In a specific embodiment, the control unit 150 determines the opening adjustment value ΔP based on the opening change rate, including: determining whether the correlation between the opening adjustment value and the opening change rate is positively correlated or negatively correlated; and determining the opening adjustment value ΔP based on the interval to which the opening change rate belongs in one or more preset change rate intervals and the determined correlation. If the opening change value ΔS is a positive value, the correlation is positive; if the opening change value ΔS is a negative value, the correlation is negative.

[0145] For example, Table 3 shows the correspondence between different change rate intervals and opening adjustment values ​​in the case of positive and negative correlation, where d(ΔS) / d(t) represents the opening change rate after adjustment relative to the opening before adjustment.

[0146] Table 3

[0147]

[0148] Figure 4 The mode control strategy flow is shown in Figure 2. Figure 4 As shown, after adjusting the opening of the throttling device, the size of the opening change value ΔS of the adjusted opening value relative to the opening value before adjustment is detected to determine whether the opening change value satisfies -4<ΔS<4, unit: step. If not, the original operation mode is maintained. If satisfied, fuzzy control is entered to control through the d(ΔS) / d(t) change rate, and feedback adjustment is performed according to the range of d(ΔS) / d(t).

[0149] Figure 10 FIG. 1 is a structural block diagram of another embodiment of the air conditioner control device provided by the present invention. Figure 10 As shown, based on any of the above embodiments, the control device 100 further includes: a collection unit 170 and a model training unit 180.

[0150] The collection unit 170 is used to collect fitting coefficients under different indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, outdoor heat exchanger temperatures and compressor operating frequencies when performing minimum opening control of the throttling device, as sample data for model training; the model training unit 180 is used to use the different indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, outdoor heat exchanger temperatures and compressor operating frequencies as model input data and the fitting coefficients as model output data to perform neural network model training and obtain a fitting coefficient output model.

[0151] Specifically, by analyzing a large amount of operating data, relevant data is recorded under different operating conditions (inner loop, outer loop) and different system parameters (evaporator inner tube temperature, condenser outer tube temperature, compressor operating frequency). This data is organized and trained as basic data, integrated through a neural network, and the fitting coefficients of the basic corresponding parameters are calculated. The neural network is then embedded into the entire machine control system. The current operating status of the air conditioner is determined by calibrating the big data basic model. After restarting, the air conditioner will be operated at the minimum opening under the corresponding operating conditions last time. The value of the fitting coefficient can be determined through the fitting process and then imported into the database.

[0152] The present invention also provides a storage medium corresponding to the air conditioner control method, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above methods are implemented.

[0153] The present invention also provides an air conditioner corresponding to the air conditioner control method, comprising 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 of the aforementioned methods when executing the computer program.

[0154] The present invention also provides an air conditioner corresponding to the control device of the air conditioner, comprising any of the aforementioned control devices of the air conditioner.

[0155] The present invention also provides a computer program product corresponding to the air conditioner control method, comprising a computer program, which implements the steps of any of the aforementioned methods when executed by a processor.

[0156] Based on this, the solution provided by the present invention determines the minimum opening of the throttling device according to the indoor and outdoor ambient temperatures and the indoor and outdoor heat exchanger temperatures, and can determine the minimum opening of the throttling device according to the actual operating status of the air conditioner, thereby accurately controlling the refrigerant flow, adapting to different working conditions, improving system efficiency, and ensuring system reliability.

[0157] The solution provided by the present invention adjusts the throttling device opening according to the real-time collection of indoor and outdoor ambient temperatures, indoor and outdoor heat exchanger temperatures, and compressor frequency, which can dynamically adjust the throttling device opening, maintain system stability, and improve comfort and efficiency.

[0158] The solution provided by the present invention applies machine learning to optimize the control strategy, enabling the system to automatically adapt to changing environments and improve reliability.

[0159] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and implementations 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 may be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Furthermore, each functional unit may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0160] In the several embodiments provided in 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 only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0161] The units described as separate components may or may not be physically separate, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0162] 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 this understanding, the technical solution of the present invention, or the part that contributes to the relevant technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0163] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A method for controlling an air conditioner, characterized in that: include: Collecting indoor ambient temperature, outdoor ambient temperature, and indoor heat exchanger temperature and outdoor heat exchanger temperature of the air conditioner; The minimum opening of the throttling device of the air conditioner is determined according to the collected indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature and outdoor heat exchanger temperature, so as to perform minimum opening control of the throttling device according to the determined minimum opening.

2. The method according to claim 1, characterized in that Determining the minimum opening of the throttling device of the air conditioner according to the collected indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, and outdoor heat exchanger temperature, including: In cooling mode, the minimum opening of the throttling device P 制冷模式 According to the following linear fitting relationship: P 制冷模式 =A*T 外环 +B*T 外管 +C Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature, A, B, and C are fitting coefficients, A is the weight coefficient corresponding to the outdoor ambient temperature, B is the weight coefficient corresponding to the outdoor heat exchanger temperature, and C is the compensation coefficient in cooling mode; and / or, In heating mode, the minimum opening of the throttling device P 制热模式 According to the following linear fitting relationship: P 制热模式 =D*T 内环 +E*T 内管 +F Among them, T 外环 Indicates the outdoor ambient temperature, T 内环 Indicates the indoor ambient temperature, T 外管 Indicates the outdoor heat exchanger temperature, T 内管 represents the indoor heat exchanger temperature. D, E, and F are fitting coefficients. D is the weight coefficient corresponding to the indoor ambient temperature, E is the weight coefficient corresponding to the indoor heat exchanger temperature, and F is the compensation coefficient in heating mode.

3. The method according to claim 2, characterized in that The fitting coefficients A, B, and C are determined according to the temperature range to which the outdoor ambient temperature belongs in the outdoor ambient temperature ranges under the preset two or more cooling modes, wherein different outdoor ambient temperature ranges correspond to different fitting coefficients A, B, and C; and / or, The fitting coefficients D, E, and F are determined according to the temperature range to which the outdoor ambient temperature belongs in the outdoor ambient temperature ranges under two or more preset heating modes, wherein different outdoor ambient temperature ranges correspond to different fitting coefficients D, E, and F.

4. The method according to any one of claims 1 to 3, characterized in that Also includes: Real-time collection of indoor ambient temperature, outdoor ambient temperature, and indoor and outdoor heat exchanger temperatures of the air conditioner; The opening of the throttling device is adjusted according to the compressor frequency of the air conditioner and the collected indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature and outdoor heat exchanger temperature.

5. The method according to claim 4, characterized in that Also includes: After adjusting the opening of the throttling device, determining whether a change in the opening after the adjustment relative to the opening before the adjustment is within a preset range; If it is determined that the opening change value is within the preset range, a preset control is performed on the opening of the throttling device.

6. The method according to claim 5, characterized in that Performing preset control on the opening of the throttling device includes: adjusting the opening of the throttling device according to a rate of change of the opening after the adjustment relative to the opening before the adjustment; The opening adjustment value is determined according to the opening change rate, and the adjusted opening value of the throttling device is determined according to the sum of the current opening value of the throttling device and the opening adjustment value.

7. The method according to claim 6, characterized in that Determining the opening adjustment value according to the opening change rate includes: Determining whether the correlation between the opening adjustment value and the opening change rate is positively correlated or negatively correlated; The opening adjustment value is determined according to the interval to which the opening change rate belongs in the two or more preset change rate intervals and the determined correlation.

8. The method according to claim 2, characterized in that Also includes: The fitting coefficients under different indoor ambient temperature, indoor heat exchanger temperature, outdoor ambient temperature, outdoor heat exchanger temperature and compressor operating frequency when the minimum opening control of the throttling device is executed are collected as sample data for model training; The different indoor ambient temperatures, indoor heat exchanger temperatures, outdoor ambient temperatures, outdoor heat exchanger temperatures and compressor operating frequencies are used as model input data, and the fitting coefficients are used as model output data to perform neural network model training and obtain a fitting coefficient output model.

9. A control device for an air conditioner, characterized in that: include: The first collecting unit is used to collect the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger temperature and the outdoor heat exchanger temperature of the air conditioner; A determination unit is used to determine the minimum opening of the throttling device of the air conditioner based on the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger temperature and outdoor heat exchanger temperature collected by the collection unit, so as to perform minimum opening control of the throttling device according to the determined minimum opening.

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

11. 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 when the processor executes the program, the steps of the method according to any one of claims 1 to 8 are implemented, or the control device according to claim 9 is included.

12. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of the method according to any one of claims 1 to 8 when the computer program is executed by a processor.

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