Air conditioner, and throttling device control method, device and storage medium thereof

Abstract

The application provides an air conditioner, a throttling device control method and device thereof and a storage medium. The method comprises the following steps: when the air conditioner is running, determining a change amount of an opening degree of a throttling device of the air conditioner according to a discharge temperature of a compressor of the air conditioner and a target discharge temperature; determining an adaptive control opening degree of the throttling device according to a protection running time of compressor frequency limiting protection and / or a protection interval time of frequency reduction protection, and combining a frequency difference value between a current running frequency of the compressor and a target running frequency or a frequency difference value between a frequency limiting protection frequency and the target running frequency; and controlling the opening degree of the throttling device according to a current opening degree of the throttling device and the determined change amount of the opening degree of the throttling device and the adaptive control opening degree of the throttling device. The scheme provided by the application can maximize the capacity and energy efficiency of the air conditioner under the premise of ensuring the reliability of the compressor and reduce the frequency of overload protection.

Description

TECHNICAL FIELD

[0001] The present application relates to the control field, and particularly to an air conditioner and a control method and device for a throttling device thereof and a storage medium. BACKGROUND

[0002] An air conditioner is composed of a compressor, a condenser, an evaporator and a throttling device, and the capacity output of the air conditioner can be adjusted by controlling the frequency of the compressor and the opening degree of the throttling device to meet the refrigeration or heating demand under different working conditions. An electronic expansion valve is one of the common throttling devices of the air conditioner, and can realize linear adjustment of the refrigerant flow.

[0003] In the related art, after the air conditioner is started, open-loop control of the compressor frequency is performed for a period of time to shorten the time to reach the target frequency and ensure reliability, and correspondingly, the electronic expansion valve also performs corresponding open-loop control, and then closed-loop negative feedback control is performed according to the compressor frequency and the target discharge temperature after the system pressure difference is established and the compressor is stably operated. Since the electronic expansion valve is adjusted by a large amplitude, it will cause severe fluctuations of high pressure and low pressure, affect the refrigerant state at the suction port of the compressor, and cause risks such as liquid knock of the compressor. Generally, the opening degree is slowly adjusted and has low priority. When the air conditioner occurs overload protection, the priority of the compressor frequency control is higher than that of the electronic expansion valve opening degree control, that is, the air conditioner first rapidly reduces the frequency, and then slowly increases the valve opening degree.

[0004] For example, when the air conditioner is running in heating mode, since the step size of the valve opening degree control is fixed, when the air outlet of the air conditioner is accidentally blocked and the actual installation relative height of the indoor and outdoor units of the air conditioner is large, the air conditioner is prone to frequent overload protection, that is, when the air conditioner occurs protection, the compressor rapidly reduces the frequency, the valve opening degree slowly increases, and after the protection is exited, the frequency is much lower than the target frequency, and the air conditioner is re-operated at a high frequency. However, the valve opening degree changes too slowly, the discharge temperature (or the inner tube temperature) is high, and therefore the air conditioner repeatedly occurs overload protection or maintains low-frequency operation, which reduces the reliability of the air conditioner system, seriously attenuates the heating capacity, and affects the service life of the air conditioner, the actual operation energy consumption and user comfort. SUMMARY

[0005] The main purpose of the present application is to overcome the defects of the above-mentioned related art, and to provide an air conditioner and a control method and device for a throttling device thereof and a storage medium, so as to solve the problem that in the related art, the opening degree control priority of the throttling device is low and the accuracy is poor under the condition that the overload protection is prone to occur, which reduces the reliability of the air conditioner system and seriously attenuates the capacity output.

[0006] The application provides a throttling device control method of an air conditioner, comprising: determining a change amount of an opening degree of a throttling device of the air conditioner according to an exhaust temperature of a compressor of the air conditioner and a target exhaust temperature when the air conditioner is running; determining an adaptive control opening degree of the throttling device according to a protection running time of compressor frequency limiting protection and / or a protection interval time of frequency reduction protection, and combining a frequency difference value between a current operating frequency and a target operating frequency of the compressor or a frequency difference value between a frequency limiting protection frequency and the target operating frequency; and controlling the opening degree of the throttling device according to a current opening degree of the throttling device and the determined change amount of the opening degree of the throttling device and the adaptive control opening degree of the throttling device.

[0007] Optionally, the method further comprises: performing a preset open-loop control logic after the air conditioner is started; and determining the change amount of the opening degree of the throttling device according to the exhaust temperature of the compressor of the air conditioner and the target exhaust temperature after exiting the open-loop control logic.

[0008] Optionally, performing the preset open-loop control logic comprises: determining an initial target operating frequency of the compressor in open-loop operation according to an outdoor environment temperature and an indoor environment temperature; determining an initial opening degree of the throttling device in open-loop operation of the compressor according to the outdoor environment temperature, the indoor environment temperature and a current operating frequency of the compressor; controlling the compressor of the air conditioner to operate at the initial target operating frequency and controlling the throttling device to operate at the initial opening degree of the throttling device; and exiting the preset open-loop control logic when detecting that the exhaust temperature of the compressor is greater than a preset exhaust temperature.

[0009] Optionally, determining the change amount of the opening degree of the throttling device according to the current exhaust temperature of the compressor of the air conditioner and the target exhaust temperature comprises: determining the change amount of the opening degree of the throttling device corresponding to the frequency difference value according to a temperature difference value range to which a temperature difference value between the current exhaust temperature of the compressor and the target exhaust temperature belongs among two or more preset temperature difference value ranges; wherein different temperature difference value ranges among the two or more temperature difference value ranges correspond to different change amounts of the opening degree of the throttling device; and / or the target exhaust temperature is determined according to an outdoor environment temperature range to which a current outdoor environment temperature belongs among two or more preset outdoor environment temperature ranges and an indoor environment temperature range to which a current indoor environment temperature belongs among two or more preset indoor environment temperature ranges; wherein different outdoor environment temperature ranges among the two or more preset outdoor environment temperature ranges and different indoor environment temperature ranges among the two or more preset indoor environment temperature ranges correspond to different target exhaust temperatures.

[0010] Optionally, the adaptive control opening of the throttling device is determined according to the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency-limiting protection frequency and the target operating frequency, in combination with the protection operation duration of the compressor frequency-limiting protection and / or the protection interval duration of the frequency reduction protection, including: determining whether the compressor overload frequency reduction protection has just been executed or whether the compressor overload frequency-limiting protection is executed; if it is determined that the compressor overload frequency reduction protection has just been executed, determining whether the adaptive control opening of the throttling device needs to be corrected according to whether the protection interval duration of the executed overload frequency reduction protection is less than the first preset interval duration for continuous n times; or, if it is determined that the compressor overload frequency-limiting protection is executed, determining whether the adaptive control opening of the throttling device needs to be corrected according to whether the protection operation duration of the current executed compressor overload frequency-limiting protection is less than the first preset protection duration; if it is determined that the adaptive control opening of the throttling device needs to be corrected, the adaptive control opening of the throttling device is determined according to the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency-limiting protection frequency and the target operating frequency.

[0011] Optionally, the determination of whether the compressor overload frequency reduction protection has just been executed or whether the compressor overload frequency-limiting protection is executed includes: judging whether the indoor heat exchanger tube temperature of the air conditioner is less than a first preset temperature value, whether the compressor frequency reduction protection state value of the air conditioner is 0, and / or whether the indoor heat exchanger tube temperature of the air conditioner is greater than or equal to a second preset temperature value; if it is judged that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and the compressor frequency reduction protection state value is not 0, it is determined that the compressor overload frequency reduction protection has just been executed; if it is judged that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and greater than or equal to the second preset temperature value, and the compressor frequency reduction protection state value is 0, it is determined that the compressor overload frequency-limiting protection is executed; wherein, when the compressor frequency reduction protection state value is 0, it indicates that the air conditioner is not in an overload protection state; when the compressor frequency reduction protection state value is 1, it indicates that the air conditioner is in an overload protection state; the first preset temperature value is greater than the second preset temperature value; and / or, the adaptive control opening of the throttling device is determined according to the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency-limiting protection frequency and the target operating frequency, including: determining the adaptive control opening of the throttling device corresponding to the frequency difference according to the frequency difference range to which the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency-limiting protection frequency and the target operating frequency belongs among two or more preset frequency difference ranges; wherein, different frequency difference ranges among the two or more frequency difference ranges correspond to different adaptive control openings of the throttling device.

[0012] Optionally, further comprising: after controlling the opening of the throttling device according to the current opening of the throttling device and the determined opening change amount of the throttling device and the adaptive control opening of the throttling device, judging whether the compressor of the air conditioner occurs liquid compression; if judging that the compressor occurs liquid compression, reducing the adaptive control opening; if judging that the compressor does not occur liquid compression, continuing to control the opening of the throttling device according to the current opening of the throttling device and the determined opening change amount of the throttling device and the adaptive control opening of the throttling device.

[0013] In another aspect, the application provides a throttling device control device of an air conditioner, comprising: a first determination unit configured to determine an opening change amount of a throttling device of the air conditioner according to a discharge temperature of a compressor of the air conditioner and a target discharge temperature when the air conditioner is running; a second determination unit configured to determine an adaptive control opening of the throttling device according to a protection running time of compressor frequency limiting protection and / or a protection interval time of frequency reduction protection, and in combination with a frequency difference between a current running frequency of the compressor and a target running frequency or a frequency difference between a frequency limiting protection frequency and the target running frequency; and a control unit configured to control the opening of the throttling device according to a current opening of the throttling device and the determined opening change amount of the throttling device and the adaptive control opening of the throttling device.

[0014] Optionally, further comprising: an execution unit configured to execute a preset open-loop control logic after the air conditioner is started; and the first determination unit is further configured to determine the opening change amount of the throttling device of the air conditioner according to the discharge temperature of the compressor of the air conditioner and the target discharge temperature after exiting the open-loop control logic.

[0015] Optionally, the execution unit executes the preset open-loop control logic, comprising: determining an initial target running frequency of the compressor in open-loop running according to an outdoor environment temperature and an indoor environment temperature; determining an initial opening of the throttling device in open-loop running according to the outdoor environment temperature, the indoor environment temperature and a current running frequency of the compressor; controlling the compressor of the air conditioner to run at the initial target running frequency and controlling the throttling device to run at the initial opening of the throttling device; and exiting the preset open-loop control logic when detecting that the discharge temperature of the compressor is greater than a preset discharge temperature.

[0016] Optionally, the first determining unit determines the opening variation of the throttling device of the air conditioner according to the current discharge temperature of the compressor of the air conditioner and the target discharge temperature, comprising: determining the opening variation of the throttling device corresponding to the frequency difference according to the temperature difference range to which the temperature difference between the current discharge temperature of the compressor and the target discharge temperature belongs among two or more preset temperature difference ranges; wherein different temperature difference ranges among the two or more temperature difference ranges correspond to different opening variations of the throttling device; and / or the target discharge temperature is determined according to the outdoor environment temperature range to which the current outdoor environment temperature belongs among two or more preset outdoor environment temperature ranges, and the indoor environment temperature range to which the current indoor environment temperature belongs among two or more preset indoor environment temperature ranges; wherein different outdoor environment temperature ranges among the two or more preset outdoor environment temperature ranges and different indoor environment temperature ranges among the two or more preset indoor environment temperature ranges correspond to different target discharge temperatures.

[0017] Optionally, the first determining unit determines the adaptive control opening of the throttling device according to the protection running time of the compressor frequency limiting protection and / or the protection interval time of the frequency reduction protection, and in combination with the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency limiting protection frequency and the target operating frequency, comprising: determining whether the compressor overload frequency reduction protection has just been executed or whether the compressor overload frequency limiting protection has been executed; if it is determined that the compressor overload frequency reduction protection has just been executed, determining whether the adaptive control opening of the throttling device needs to be corrected according to whether the protection interval time of the overload frequency reduction protection is less than a first preset interval time for n consecutive times; or, if it is determined that the compressor overload frequency limiting protection has been executed, determining whether the adaptive control opening of the throttling device needs to be corrected according to whether the protection running time of the current compressor overload frequency limiting protection is less than a first preset protection time; if it is determined that the adaptive control opening of the throttling device needs to be corrected, determining the adaptive control opening of the throttling device according to the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency limiting protection frequency and the target operating frequency.

[0018] Optionally, the determining unit determines whether the compressor overload frequency reduction protection is just performed or the compressor overload frequency limiting protection is performed, including: judging whether the indoor heat exchanger pipe temperature of the air conditioner is less than a first preset temperature value, whether the compressor frequency reduction protection state value of the air conditioner is 0, and / or whether the indoor heat exchanger pipe temperature of the air conditioner is greater than or equal to a second preset temperature value; if it is judged that the indoor heat exchanger pipe temperature of the air conditioner is less than the first preset temperature value and the compressor frequency reduction protection state value is not 0, it is determined that the compressor overload frequency reduction protection is just performed; if it is judged that the indoor heat exchanger pipe temperature of the air conditioner is less than the first preset temperature value and greater than or equal to the second preset temperature value and the compressor frequency reduction protection state value is 0, it is determined that the compressor overload frequency limiting protection is performed; wherein, when the compressor frequency reduction protection state value is 0, it indicates that the air conditioner is not in the overload protection state; when the compressor frequency reduction protection state value is 1, it indicates that the air conditioner is in the overload protection state; the first preset temperature value is greater than the second preset temperature value; and / or the determining unit determines the adaptive control opening degree of the throttling device according to the frequency difference value between the current operating frequency of the compressor and the target operating frequency or the frequency difference value between the frequency limiting protection frequency and the target operating frequency, including: determining the adaptive control opening degree of the throttling device corresponding to the frequency difference value according to the frequency difference value range to which the frequency difference value between the current operating frequency of the compressor and the target operating frequency or the frequency difference value between the frequency limiting protection frequency and the target operating frequency belongs in the two or more preset frequency difference value ranges; wherein, different frequency difference value ranges in the two or more frequency difference value ranges correspond to different adaptive control opening degrees of the throttling device.

[0019] Optionally, further comprising: a judging unit configured to judge whether the compressor of the air conditioner is in liquid compression after the opening degree of the throttling device is controlled according to the current opening degree of the throttling device and the determined opening degree variation of the throttling device and the adaptive control opening degree of the throttling device; and the controlling unit is further configured to: if the judging unit judges that the compressor is in liquid compression, reduce the adaptive control opening degree; and if the judging unit judges that the compressor is not in liquid compression, continue to control the opening degree of the throttling device according to the current opening degree of the throttling device and the determined opening degree variation of the throttling device and the adaptive control opening degree of the throttling device.

[0020] In still another aspect, the present application provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the foregoing methods.

[0021] In still another aspect, the present application provides an air conditioner comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of any of the foregoing methods when executing the program.

[0022] Still another aspect of the present application provides an air conditioner comprising the control device as described in any of the preceding aspects.

[0023] According to the technical solution of the present application, the adaptive control opening of the throttling device is determined according to the protection time length of the compressor frequency limiting protection and / or the protection period of the frequency reduction protection, in combination with the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency limiting protection frequency and the target operating frequency; and the opening of the throttling device is controlled according to the current opening of the throttling device, the opening change amount and the adaptive control opening. The problem that the electronic expansion valve opening control priority is low and the accuracy is low under the condition that the overload protection is prone to occur, resulting in the reduction of the reliability of the air conditioning system and the serious attenuation of the capacity output, can be solved, the reliable and comfortable operation of the air conditioner is realized, the service life of the air conditioner is improved, and the user experience is improved.

[0024] According to the technical solution of the present application, the adaptive control of the electronic expansion valve opening adjustment increment is used to solve the problem that the fixed valve opening control leads to frequent overload protection or continuous low-frequency operation, to maximize the capacity efficiency of the air conditioner under the premise of ensuring the reliability of the compressor, to reduce the frequency of overload protection, and to improve the service life of the air conditioner and the user comfort. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0026] Figure 1 FIG. 1 is a method schematic diagram of an embodiment of the throttling device control method of the air conditioner provided by the present application;

[0027] Figure 2 FIG. 2 is a step flowchart showing one specific embodiment of the steps of the execution of the preset open-loop control logic of the present application;

[0028] Figure 3 FIG. 3 is an open-loop control logic schematic diagram of the present application;

[0029] Figure 4 FIG. 4 is a throttling device target discharge temperature control logic schematic diagram of the present application;

[0030] Figure 5 FIG. 5 is a step flowchart showing one specific embodiment of the steps of the determination of the adaptive control opening of the throttling device according to the present application;

[0031] Figure 6 FIG. 6 shows the adaptive control opening correction control logic of the electronic expansion valve;

[0032] Figure 7is a method schematic view of a specific embodiment of the throttling device control method of the air conditioner provided by the present application;

[0033] Figure 8 is a method schematic view of a specific embodiment of the throttling device control method of the air conditioner provided by the present application;

[0034] Figure 9 is the heating operation electronic expansion valve adaptive control logic of the present application;

[0035] Figure 10 is a comparison schematic view of the compressor operation frequency and overload protection timing of the technical solution of the present application and related technical solutions;

[0036] Figure 11 is a comparison schematic view of the indoor average temperature change of the technical solution of the present application and related technical solutions;

[0037] Figure 12 is a structure block diagram of an embodiment of the throttling device control device of the air conditioner provided by the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below by combining the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0040] This invention provides a method for controlling a throttling device in an air conditioner. The method includes: determining the change in the opening degree of the throttling device based on the compressor's discharge temperature and a target discharge temperature during air conditioner operation; determining an adaptive control opening degree of the throttling device based on the compressor's frequency limiting protection duration and / or frequency reduction protection interval duration, combined with the frequency difference between the compressor's current operating frequency and the target operating frequency, or the frequency difference between the frequency limiting protection frequency and the target operating frequency; and controlling the opening degree of the throttling device based on its current opening degree, the determined change in opening degree, and the adaptive control opening degree. Preferably, after the air conditioner is started, a preset open-loop control logic is executed first; after exiting the open-loop control logic, the change in the opening degree of the throttling device is determined again based on the compressor's discharge temperature and the target discharge temperature.

[0041] Figure 1 This is a schematic diagram of an embodiment of the air conditioning throttling device control method provided by the present invention.

[0042] like Figure 1 As shown, according to an embodiment of the present invention, the throttling device control method includes at least steps S110, S120, S130 and S140.

[0043] Step S110: After the air conditioner is turned on, the preset open-loop control logic is executed.

[0044] Figure 2 A flowchart illustrating a specific embodiment of the steps for executing preset open-loop control logic according to the present invention is shown. Figure 2 As shown, in one specific embodiment, executing the preset open-loop control logic includes steps S111, S112, S113, and S114.

[0045] Step S111: Determine the initial target operating frequency f for compressor open-loop operation based on outdoor ambient temperature Tw and indoor ambient temperature Tn. LC .

[0046] Specifically, the initial target operating frequency f LC = k1Tw + k2; k1 is determined by the temperature range of the outdoor ambient temperature Tw, and k2 is determined by the temperature range of the indoor ambient temperature Tn. Performance tests can be conducted to pre-determine k1 and k2 for different indoor and outdoor temperature ranges, ensuring that the air conditioning capacity and efficiency are at their optimal levels under different operating conditions.

[0047] Step S112: Determine the initial opening degree P of the throttling device for open-loop operation of the compressor based on the outdoor ambient temperature Tw, the indoor ambient temperature Tn, and the compressor's current operating frequency f.LC .

[0048] Specifically, the initial electronic expansion valve opening degree P LC =k3Tw+k4Tn+k5f+k6; k3, k4, k5, k6 are determined by experimental tests to ensure that the compressor has sufficient suction superheat during startup.

[0049] Step S113, control the compressor of the air conditioner to run at the initial target running frequency, and control the throttling device to run at the initial opening degree of the throttling device.

[0050] Step S114, when it is detected that the exhaust temperature of the compressor is greater than the preset exhaust temperature, the preset open-loop control logic is exited.

[0051] Figure 3 The open-loop control logic of the application is shown in the figure. As Figure 3 shown, the throttling device is an electronic expansion valve. After the air conditioner is started, the outdoor environment temperature Tw, the indoor environment temperature Tn, the current running frequency f of the compressor and the current exhaust temperature Tp of the compressor are detected and recorded. The initial target running frequency f LC of the open-loop running of the compressor is determined according to the outdoor environment temperature Tw and the indoor environment temperature Tn, and the initial electronic expansion valve opening degree P LC of the open-loop running is determined according to the outdoor environment temperature Tw, the indoor environment temperature Tn and the current running frequency f of the compressor. The air conditioner is controlled to run at the initial target running frequency f LC of the compressor and the initial electronic expansion valve opening degree P LC . The current exhaust temperature Tp of the compressor is detected and recorded in real time, and the relationship between the current exhaust temperature Tp and the preset exhaust temperature Tp1 is judged.

[0052] 1) When Tp is less than or equal to Tp1, i.e. the current high-low pressure difference of the compressor is not balanced and the system state is unstable, the current system open-loop control logic is maintained to ensure that the compressor has sufficient suction superheat and runs reliably.

[0053] 2) When Tp is greater than Tp1, i.e. the compressor enters the stable running process, the system open-loop control is exited and the electronic expansion valve target exhaust temperature control logic is executed.

[0054] Step S120, during the running of the air conditioner, the opening degree change amount of the throttling device of the air conditioner is determined according to the exhaust temperature and the target exhaust temperature of the compressor of the air conditioner.

[0055] Specifically, when the open-loop control logic satisfies that the discharge temperature of the compressor is greater than the preset discharge temperature, the open-loop control is exited, and the target discharge temperature control logic of the throttling device is executed. The throttling device is, for example, an electronic expansion valve. The opening degree change amount of the throttling device is determined through the target discharge temperature control of the throttling device.

[0056] When the target discharge temperature control logic of the throttling device is executed, the target frequency of the compressor is determined according to the indoor environment temperature change rate v, the temperature difference ΔT between the indoor environment temperature and the set temperature, and the current operating frequency f of the compressor; it is judged whether the compressor of the air conditioner enters a protection operating state; if it is judged that the compressor is in a protection operating state, the compressor is controlled to operate at a preset protection frequency; if it is judged that the compressor is not in a protection operating state, the compressor is controlled to operate at the target frequency. The target frequency fgoal of the compressor fgoal = f + f FC , wherein f is the current operating frequency f of the compressor, f FC is the compressor frequency fuzzy control correction amount, which is determined according to the indoor environment temperature change rate v and the temperature difference ΔT between the indoor environment temperature and the set temperature, and can be determined through a ΔT-v fuzzy control table determined through experiments. The ΔT-v fuzzy control table is a corresponding relationship table in which different indoor environment temperature change rates v and different temperature differences ΔT between the indoor environment temperature and the set temperature correspond to different compressor frequency fuzzy control correction amounts.

[0057] In a specific embodiment, the opening degree change amount of the throttling device corresponding to the frequency difference is determined according to the temperature difference range to which the temperature difference ΔTp = Tp - Tpgoal between the current discharge temperature Tp of the compressor and the target discharge temperature Tpgoal belongs in the preset two or more temperature difference ranges. Different temperature difference ranges in the two or more temperature difference ranges correspond to different opening degree change amounts of the throttling device.

[0058] ΔTp = Tp - Tpgoal corresponds to different opening degree change amounts ΔP in different temperature difference ranges; ΔP and ΔTp are in a positive correlation relationship, for example, referring to Table 1, the different opening degree change amounts corresponding to the temperature difference ranges between the current discharge temperature Tp and the target discharge temperature Tpgoal of a certain 3-match cabinet machine determined through experiments are shown in the following table 1:

[0059] Opening change amount ΔP Delta T p = T p - T pgoal ]]> Delta P i ]] ΔT p ≥10°C ​ 8°C > ΔT p ≥ 4°C 0 4°C > ΔT p -2°C - ΔP1 -2°C > ΔT p > -8°C - ΔP i ]] -16 °C ≥ ΔT p ]]>

[0060] Table 1

[0061] The target exhaust temperature can be determined according to an outdoor environment temperature interval to which a current outdoor environment temperature belongs in two or more preset outdoor environment temperature intervals, and an indoor environment temperature interval to which a current indoor environment temperature belongs in two or more preset indoor environment temperature intervals, wherein different outdoor environment temperature intervals in the two or more preset outdoor environment temperature intervals and different indoor environment temperature intervals in the two or more preset indoor environment temperature intervals correspond to different target exhaust temperatures.

[0062] Specifically, the target exhaust temperature table is determined through temperature combination experiments, and the exhaust temperature corresponding to a point with the best capacity and energy efficiency at different outdoor environment temperatures and indoor environment temperatures is taken as the target exhaust temperature. For example, reference can be made to Table 2 shown as follows:

[0063]

[0064] Table 2

[0065] The target exhaust temperature control logic of the throttling device can also refer to Figure 4 . Figure 4 The target exhaust temperature control logic of the throttling device (electronic expansion valve) of the present application is shown in the schematic diagram. As shown in Figure 4 , the indoor environment temperature change rate v, the temperature difference ΔT between the indoor environment temperature and the set temperature, and the current operating frequency f of the compressor are detected and recorded in real time, and the target frequency fgoal of the compressor is determined according to the indoor environment temperature change rate v, the temperature difference ΔT between the indoor environment temperature and the set temperature, and the current operating frequency f of the compressor, that is, fgoal=f+f FC . It is determined whether the compressor enters a protection operating state, and if the compressor is in the protection operating state, the compressor is controlled to operate at the protection frequency fprot; the operation to the protection frequency fprot can not be completed at one time, and at the beginning, it is a frequency reduction protection, for example, a reduction of 2 Hz each time, until the condition of the constant frequency operation protection is reached, at which time the corresponding protection frequency is fprot; in addition, when the compressor is initially in the constant frequency protection operating state, the current frequency is fprot. The condition for exiting the constant frequency operation: the condition for exiting the protection operation is reached, for example, the inner tube temperature drops below a certain value. If the compressor is not in the protection operating state, the compressor is controlled to operate at the target operating frequency fgoal.

[0066] The target exhaust temperature is determined through the target exhaust temperature table according to the current indoor environment temperature and the outdoor environment temperature, the current exhaust temperature Tp is detected and recorded, the difference ΔTp=Tp-Tpgoal between the current exhaust temperature Tp and the target exhaust temperature Tpgoal is calculated, and then the electronic expansion valve opening degree change amount ΔP is determined according to ΔTp; next, the current valve self-adaptive control opening degree P AC is continuously detected and recorded, and the electronic expansion valve opening degree P=P0+ΔP+PAC The above feedback control, i.e., the electronic expansion valve target discharge temperature control logic, is a closed-loop feedback regulation.

[0067] Step S130: determining the adaptive control opening of the throttling device according to the protection running time of the compressor frequency limiting protection and / or the protection interval time of the frequency reduction protection, and combining the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency limiting protection frequency and the target operating frequency.

[0068] Figure 5 A step flow chart of a specific embodiment of the step of determining the adaptive control opening of the throttling device according to the present application is shown. As shown in Figure 5 Step S130 includes steps S131-S134.

[0069] Step S131: determining whether the compressor overload frequency reduction protection has just been executed or the compressor overload frequency limiting protection is executed.

[0070] In a specific embodiment, it is determined whether the indoor heat exchanger tube temperature of the air conditioner is less than a first preset temperature value, whether the compressor frequency reduction protection state value of the air conditioner is 0, and / or whether the indoor heat exchanger tube temperature of the air conditioner is greater than or equal to a second preset temperature value; if it is determined that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and the compressor frequency reduction protection state value is not 0, it is determined that the compressor overload frequency reduction protection has just been executed; if it is determined that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and greater than or equal to the second preset temperature value, and the compressor frequency reduction protection state value is 0, it is determined that the compressor overload frequency limiting protection is executed.

[0071] Specifically, a compressor frequency reduction protection state value i is set in advance to identify whether the compressor is in a frequency reduction protection state, and the initial value of the compressor frequency reduction protection state i = 0; when the compressor frequency reduction protection state value is 0, it indicates that the air conditioner is not in an overload protection state; when the compressor frequency reduction protection state value is 1, it indicates that the air conditioner is in an overload protection state; the first preset temperature value is a frequency reduction protection judgment value, and the second preset temperature value is a frequency limiting protection judgment value, and the first preset temperature value is greater than the second preset temperature value.

[0072] If it is determined that the indoor heat exchanger tube temperature Ts of the air conditioner is greater than or equal to the first preset temperature value T1, i.e., the indoor tube temperature of the air conditioner is too high, the compressor overload frequency reduction protection is triggered, the overload frequency reduction protection is executed, and the initial value of the compressor frequency reduction protection state i = 1 is set, and then the target discharge temperature control is continued to be executed until the compressor overload frequency reduction protection is exited.

[0073] If it is judged that the indoor heat exchanger tube temperature Ts of the air conditioner is less than the first preset temperature value T1 and the compressor frequency reduction protection state value is not 0, it is determined that the compressor overload frequency reduction protection is just executed. Ts is less than T1, that is, the indoor tube temperature of the air conditioner does not reach the compressor overload frequency reduction protection condition or just exits the overload frequency reduction protection, and if the compressor frequency reduction protection state value i is 0, it indicates that the air conditioner is in a normal running state, and if i is not equal to 0, it indicates that the air conditioner just exits the overload frequency reduction protection.

[0074] If it is judged that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and greater than or equal to the second preset temperature value, and the compressor frequency reduction protection state value is 0, it is determined that the compressor overload frequency reduction protection is executed. Wherein, Ts is less than T1, that is, the indoor tube temperature of the air conditioner does not reach the compressor overload frequency reduction protection condition or just exits the overload frequency reduction protection, and if the compressor frequency reduction protection state value i is 0, it indicates that the air conditioner is in a normal running state, and if Ts is less than T2, that is, the indoor tube temperature of the air conditioner does not reach the compressor overload frequency reduction protection condition or just exits the overload frequency reduction protection, and the indoor tube temperature is in a normal range, the target exhaust temperature control is continued to be executed; if Ts is greater than or equal to T2, that is, the air conditioner triggers the overload frequency reduction protection, the compressor maintains the current frequency operation.

[0075] If it is judged that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and greater than or equal to the second preset temperature value, and the compressor frequency reduction protection state value is 0, it is determined that the compressor overload frequency reduction protection is executed. Wherein, Ts is less than T1, that is, the indoor tube temperature of the air conditioner does not reach the compressor overload frequency reduction protection condition or just exits the overload frequency reduction protection, and if the compressor frequency reduction protection state value i is 0, it indicates that the air conditioner is in a normal running state, and if Ts is less than T2, that is, the indoor tube temperature of the air conditioner does not reach the compressor overload frequency reduction protection condition or just exits the overload frequency reduction protection, and the indoor tube temperature is in a normal range, the target exhaust temperature control is continued to be executed; if Ts is greater than or equal to T2, that is, the air conditioner triggers the overload frequency reduction protection, the compressor maintains the current frequency operation.

[0076] Specifically, if it is judged that the indoor heat exchanger tube temperature Ts of the air conditioner is less than the first preset temperature value T1 and the compressor frequency reduction protection state value is not 0, it indicates that the compressor overload frequency reduction protection is just exited, the compressor cumulative running time t is detected and recorded, that is, the interval time from the last time the overload frequency reduction protection is exited (wherein the t recorded for the first time is the interval time from the first time the overload frequency reduction protection is exited to the compressor being started), and the compressor overload frequency reduction protection state value i is reset to 0.

[0077] The period f(t, n) of the overload frequency reduction protection is determined, that is, the overload frequency reduction protection interval time t of the latest n times is obtained, and the relationship between t and the preset value t1 (the first preset interval time) is judged, that is, whether the protection interval time of the overload frequency reduction protection is less than the first preset interval time t1 for n times in succession is judged.

[0078] If t is less than t1 for n consecutive times, i.e. the compressor overloads and the frequency reduction protection period is short and the frequency is high, the system is unstable, and the current electronic expansion valve opening control is unreasonable, the adaptive control opening of the throttling device needs to be corrected, the adaptive control opening PAC is corrected subsequently, and the target exhaust temperature control logic is continued to be executed.

[0079] If t is greater than or equal to t1 for at least one of n times, i.e. the compressor overloads and the frequency reduction protection period is long, the system is relatively stable, and the current electronic expansion valve opening control is reasonable, the adaptive control opening of the throttling device does not need to be corrected, and the overloading frequency limiting protection or the normal target exhaust temperature control logic is executed according to the inner tube temperature Ts.

[0080] In step S133, if it is determined to execute the compressor overloading frequency limiting protection, whether the adaptive control opening of the throttling device needs to be corrected is determined according to whether the protection running time of the current compressor overloading frequency limiting protection is greater than a first preset protection time. If the protection running time of the current compressor overloading frequency limiting protection is greater than the first preset protection time, it is determined that the adaptive control opening of the throttling device needs to be corrected. If the protection running time of the current compressor overloading frequency limiting protection is less than or equal to the first preset protection time, it is determined that the adaptive control opening of the throttling device does not need to be corrected.

[0081] Specifically, in the case that the indoor heat exchanger tube temperature Ts is less than a first preset temperature value T1 and the compressor frequency reduction protection state value is 0, if the indoor heat exchanger tube temperature Ts is greater than or equal to a second preset temperature value, the compressor overloading frequency limiting protection is executed, the compressor maintains the current frequency, the overloading frequency limiting protection running time s is detected and recorded, and the relationship between s and a first preset protection time s1 is determined. If s is less than or equal to s1, i.e. the compressor frequency limiting protection time is normal, the current running state is maintained until the air conditioner inner tube temperature is lower than T2, the overloading frequency limiting protection is exited, and the target exhaust temperature control is executed. If s is greater than s1, i.e. the compressor frequency limiting protection time is too long, the inner tube temperature is continuously high, and the current throttling device (electronic expansion valve opening) may be controlled too small, the adaptive control opening of the throttling device needs to be corrected.

[0082] In step S134, if it is determined that the adaptive control opening of the throttling device needs to be corrected, the adaptive control opening of the throttling device is determined according to the frequency difference between the current running frequency of the compressor and the target running frequency or the frequency difference between the frequency limiting protection frequency and the target running frequency.

[0083] In a specific embodiment, the adaptive control opening degree of the throttling device corresponding to the frequency difference value is determined according to the frequency difference value between the current operating frequency of the compressor and the target operating frequency or the frequency difference value between the frequency limiting protection frequency and the target operating frequency in the frequency difference value range to which the frequency difference value belongs among the preset two or more frequency difference value ranges;

[0084] Wherein, different frequency difference value ranges among the two or more frequency difference value ranges correspond to different adaptive control opening degrees of the throttling device. Obtain the current operating frequency f of the compressor or the frequency limiting protection frequency fprot, the target operating frequency fgoal, calculate the frequency difference value Δf = f-fgoal, and correct the adaptive control opening degree P according to Δf AC Different frequency difference value ranges correspond to different adaptive control opening degrees of the throttling device, for example; as shown in Table 3 below

[0085] Valve adaptive control opening P AC ]]> Δf = f - f goal ]]> P ACi ]]> Δf ≥ 10 Hz P AC1 ]]> 8 Hz > Δf ≥ 4 Hz 0 4 Hz > Δf > -2 Hz - P AC1 ]] -2 Hz ≥ Δf > -8 Hz - P ACi ]] -16 Hz ≥ Δf

[0086] Table 3

[0087] Step S140, according to the current opening degree of the throttling device and the determined opening degree change amount of the throttling device and the adaptive control opening degree of the throttling device, control the opening degree of the throttling device.

[0088] Specifically, the opening degree of the throttling device is controlled to be equal to the sum of the current opening degree P0 of the throttling device, the opening degree change amount ΔP of the throttling device and the adaptive control opening degree P of the throttling device, P = P0+ΔP+P AC AC .

[0089] Optionally, the method further comprises: after controlling the opening degree of the throttling device according to the current opening degree of the throttling device and the determined opening degree change amount of the throttling device and the adaptive control opening degree of the throttling device, judging whether the compressor of the air conditioner occurs liquid compression; if it is judged that the compressor occurs liquid compression, the adaptive control opening degree is reduced; if it is judged that the compressor does not occur liquid compression, the opening degree of the throttling device is continued to be controlled according to the current opening degree of the throttling device and the determined opening degree change amount of the throttling device and the adaptive control opening degree of the throttling device.

[0090] Figure 6 The electronic expansion valve adaptive control opening degree correction control logic is shown, specifically, after the air conditioner enters the valve adaptive control opening degree P AC The current compressor current operating frequency f (or frequency limiting protection frequency fprot), the target operating frequency fgoal are detected and recorded first, the difference Δf = f-fgoal is calculated, and the valve adaptive control opening degree P AC ​, execute target exhaust temperature control logic, and continue to determine whether the compressor is in liquid compression,

[0091] 1) If the compressor is in liquid compression, i.e., the electronic expansion valve opening degree correction is too large, reduce P AC , continue to determine whether liquid compression occurs;

[0092] 2) If the compressor is not in liquid compression, i.e., the electronic expansion valve opening degree correction is reasonable and no reliability problem occurs, execute the target exhaust temperature control logic according to the current P AC .

[0093] To clearly illustrate the technical solutions of the present application, the execution process of the air conditioner throttling device control method provided by the present application is described below with one specific embodiment.

[0094] Figure 7 is a method schematic diagram of a specific embodiment of the air conditioner throttling device control method provided by the present application. As shown in Figure 7 , the throttling device is an electronic expansion valve, after the air conditioner is started and runs, the current electronic expansion valve opening degree P0 is detected and recorded in real time, and the electronic expansion valve opening degree change amount ΔP and the adaptive control opening degree P AC are calculated in real time, and the real-time opening degree of the closed-loop controlled electronic expansion valve is:

[0095] P = P0 + ΔP + P AC

[0096] Wherein, the opening degree change amount ΔP is determined by the outdoor environment temperature Tw, the indoor environment temperature Tn, the indoor temperature change rate v, the room temperature and the set temperature difference ΔT, the compressor operating frequency f, the exhaust temperature Tp, and the target exhaust temperature Tpgoal, and is determined by the electronic expansion valve target exhaust temperature control; the adaptive control opening degree P AC is determined by the protection time length s of the compressor overload limiting frequency or frequency reduction protection during the air conditioner running process, the protection cycle f(t, n), the difference Δf between the compressor protection operating frequency and the target operating frequency, and is determined by the electronic expansion valve adaptive control opening degree correction control logic.

[0097] Figure 8 is a method schematic diagram of a specific embodiment of the air conditioner throttling device control method provided by the present application. As shown in Figure 8The throttling device is an electronic expansion valve, and the electronic expansion valve opening degree change amount ΔP is determined in a standard installation and test state, and is a fixed value in different installation states and operation states of the air conditioner, so when the actual installation / operation state of the air conditioner deviates from the standard state, the valve opening degree cannot be self-adaptively controlled, which easily leads to serious attenuation of air conditioner capacity and energy efficiency, triggers compressor overload protection, reduces user comfort and compressor reliability, and increases energy consumption. Based on this, the application proposes an electronic expansion valve self-adaptive control logic.

[0098] Taking heating operation as an example, Figure 8 The heating operation electronic expansion valve self-adaptive control logic of the application is that the air conditioner is started and operated in heating mode, the initial value P of the self-adaptive control opening degree of the throttling device is set to 0 AC = 0, the initial value i of the compressor frequency reduction protection is 0, i = 0 indicates that the air conditioner is in an overload frequency reduction protection state, that is, the air conditioner is just started or has been in a normal operation state or has just exited the overload protection control; i = 1 indicates that the air conditioner is in an overload protection control state.

[0099] Firstly, the system open-loop control is executed until the open-loop control exit condition is met (see the system open-loop control logic for details), and then the electronic expansion valve target discharge temperature control logic is executed (see the electronic expansion valve target discharge control logic for details). After adjusting the electronic expansion valve opening degree P each time, the air conditioner inner tube temperature Ts is continuously detected and recorded, and the relationship between the air conditioner inner tube temperature Ts and the preset temperature value T1 is determined, wherein:

[0100] 1) If Ts is greater than or equal to T1, that is, the air conditioner inner tube temperature is too high, the compressor overload frequency reduction protection is triggered, and then the overload frequency reduction protection is executed, and the target discharge temperature control is continuously executed until the protection is exited.

[0101] The overload frequency reduction protection control logic is as shown in Figure 9 After the compressor enters the overload frequency reduction protection, the compressor frequency reduction protection value i = 1 is first taken, i = 1 indicates that the air conditioner is in an overload protection control state, the current compressor operating frequency f is detected and recorded, and then the compressor frequency is controlled to be reduced by f1. At this time, the compressor is controlled according to the protection frequency fprot = f-f1, and the target discharge temperature control is continuously executed.

[0102] 2) If Ts is less than T1, that is, the air conditioner inner tube temperature does not reach the compressor overload frequency reduction protection condition or has just exited the overload frequency reduction protection, the compressor frequency reduction protection value i is continuously detected and recorded.

[0103] I) When i is equal to 0, that is, the air conditioner is in a normal operation state, the relationship between the air conditioner inner tube temperature Ts and the preset temperature value T2 is continuously determined.

[0104] ① If Ts is less than T2, i.e. the inner tube temperature of the air conditioner does not reach the over-load frequency limiting protection condition of the compressor or just exits the over-load frequency limiting protection, the inner tube temperature is in the normal range, the target exhaust temperature control is continued to be executed;

[0105] ② If Ts is greater than or equal to T2, i.e. the over-load frequency limiting protection is triggered, the compressor maintains the current frequency operation, the over-load frequency limiting protection operation time s is detected and recorded, the relationship between s and the preset time s1 is determined, if s is less than or equal to s1, i.e. the over-load frequency limiting protection time is normal, the current operation state is maintained until the inner tube temperature of the air conditioner is less than T2, the over-load frequency limiting protection is exited, and the target exhaust temperature control is executed; if s is greater than s1, i.e. the over-load frequency limiting protection time is too long, the inner tube temperature is continuously high, and the current electronic expansion valve opening degree may be controlled too small, the current operation frequency f (or the frequency limiting protection frequency fprot) of the compressor is continued to be acquired, the target operation frequency fgoal is calculated, the difference Δf = f-fgoal is calculated, the valve self-adaptive control opening degree PAC is corrected according to Δf, and the target exhaust temperature control logic is continued to be executed.

[0106] II) In the case that Ts is less than T1, when i is not equal to 0, i.e. the air conditioner just exits the over-load frequency limiting protection, the cumulative operation time t of the compressor is detected and recorded, and the over-load frequency limiting protection value i = 0 is reset, at this time, the operation time t is the interval time from the last time the over-load frequency limiting protection is exited to the compressor is started. (Note: the first recorded t is the interval time from the first time the over-load frequency limiting protection is exited to the compressor is started) the over-load frequency limiting protection cycle f(t, n) is continued to be determined, i.e. the over-load frequency limiting protection interval time t of the last n times is acquired, the relationship between t and the preset value t1 is determined,

[0107] ① If t is less than or equal to t1 is detected for n times continuously, i.e. the over-load frequency limiting protection cycle of the compressor is short, the frequency is high, the over-load protection occurs frequently, the system is unstable, and the current electronic expansion valve opening degree control is unreasonable, the current operation frequency f (or the frequency limiting protection frequency fprot) of the compressor is continued to be acquired, the target operation frequency fgoal is calculated, the difference Δf = f-fgoal is calculated, the valve self-adaptive control opening degree PAC is corrected according to Δf, and the target exhaust temperature control logic is continued to be executed.

[0108] ② If t is greater than or equal to t1 is detected for n times, i.e. the over-load frequency limiting protection cycle of the compressor is long, the system is relatively stable, and the current electronic expansion valve opening degree control is reasonable, the over-load frequency limiting protection or the normal target exhaust temperature control logic is executed according to the inner tube temperature Ts.

[0109] After the adaptive throttling device control method of the application is adopted, the actual running state of the air conditioner and the protection state of the compressor can be judged in real time, the opening control precision and speed of the valve are adaptively regulated and controlled, the priority and accuracy of the electronic expansion valve control under the condition that the air conditioner deviates from the standard running state are improved, the compressor protection is avoided, the service life of the air conditioner is improved, the capacity and energy efficiency output of the air conditioner are ensured, and the user experience is improved.

[0110] Figure 10 A comparison diagram of the compressor running frequency and overload protection timing of the technical solution and related technical solutions of the application is shown in Fig. Figure 10 In order to make the comparison clearer, when the timing of the related technology is 1 and the timing of the technical solution of the application is 2, it is indicated that the compressor is in an overload frequency limiting or frequency reduction protection state; when the timing is 0, it is indicated that the compressor is in a normal running state. Under the condition of an inner ring temperature of 7 DEG C and an outer ring temperature of 7 DEG C, the air conditioner is set to run at 30 DEG C for heating, the related technology triggers overload frequency limiting and frequency reduction protection at the 7th minute, and after the frequency reduction protection, the compressor frequency is far lower than the target running frequency, the compressor frequency is increased again, but the electronic expansion valve opening increment changes slowly, so the overload protection frequency reduction is triggered frequently in the early stage, the frequency cannot be increased, the electronic expansion valve opening is adaptively regulated and controlled in the technical solution of the application, the inner tube temperature is lower than that in the prior art solution under the same running frequency, the overload frequency reduction protection is triggered at the 12th minute, the compressor frequency is high at this time, the compressor enters a long-time overload frequency limiting control, the electronic expansion valve is always in a reasonable control range because the current frequency and the target frequency are not greatly different, and the air conditioner capacity output is also maximized. Therefore, compared with the prior art, the technical solution of the application triggers the compressor overload frequency limiting and frequency reduction protection less frequently, is more stable in running, has higher air conditioner capacity output, and is better in reliability.

[0111] Figure 11 A comparison diagram of the indoor average temperature change of the technical solution of the application and the related technical solution is shown in Fig. Figure 11 As shown in the experimental test, the indoor temperature rise of the technical solution of the application is 15.6 DEG C at the 20th minute, which is 39.3% higher than that (11.2 DEG C) of the related technical solution, the indoor temperature rise rate is faster, and the user comfort is better.

[0112] The application further provides a throttling device control device of an air conditioner.

[0113] Figure 12 An embodiment of the throttling device control device of the air conditioner provided by the application is shown in Fig. Figure 12 As shown in the figure, the control device 100 comprises a first determination unit 120, a second determination unit 130 and a control unit 140.

[0114] The first determining unit 120 is used to determine the change in the opening degree of the throttling device of the air conditioner based on the exhaust temperature of the compressor and the target exhaust temperature when the air conditioner is running.

[0115] Preferably, such as Figure 12 As shown, the device 100 further includes an execution unit 110, which is used to execute a preset open-loop control logic after the air conditioner is turned on; the first determining unit 120 is further used to: after exiting the open-loop control logic, determine the opening change of the air conditioner's throttling device based on the air conditioner's compressor exhaust temperature and target exhaust temperature.

[0116] The execution unit 110 executing the preset open-loop control logic may specifically include: determining the initial target operating frequency f of the compressor for open-loop operation based on the outdoor ambient temperature Tw and the indoor ambient temperature Tn. LC The initial opening degree P of the throttling device for open-loop operation of the compressor is determined based on the outdoor ambient temperature Tw, the indoor ambient temperature Tn, and the compressor's current operating frequency f. LC The system controls the air conditioner compressor to operate at the initial target operating frequency and controls the throttling device to operate at the initial opening degree. When the compressor's exhaust temperature is detected to be higher than the preset exhaust temperature, the preset open-loop control logic is exited.

[0117] Specifically, the initial target operating frequency f LC = k1Tw + k2; k1 is determined by the temperature range of the outdoor ambient temperature Tw, and k2 is determined by the temperature range of the indoor ambient temperature Tn. Performance tests can be conducted to pre-determine k1 and k2 for different indoor and outdoor temperature ranges, ensuring optimal air conditioning efficiency under various operating conditions. Initial electronic expansion valve opening P LC =k3Tw+k4Tn+k5f+k6; k3, k4, k5, and k6 are determined through experimental testing to ensure that the compressor has sufficient suction superheat during startup.

[0118] Figure 3 This is a schematic diagram of the open-loop control logic of the present invention. Figure 3 As shown, after the air conditioner is turned on, the outdoor ambient temperature Tw, indoor ambient temperature Tn, current compressor operating frequency f, and current compressor discharge temperature Tp are detected and recorded. Based on the outdoor ambient temperature Tw and indoor ambient temperature Tn, the initial target operating frequency f for open-loop operation of the compressor is determined. LC The initial opening degree P of the electronic expansion valve for open-loop operation is determined based on the outdoor ambient temperature Tw, the indoor ambient temperature Tn, and the current operating frequency f of the compressor. LC Control the air conditioner to operate at the compressor's initial target frequency f. LC Initial electronic expansion valve opening P LCRunning, real-time detection and record the current exhaust temperature Tp and determine the relationship between the current exhaust temperature Tp and the preset exhaust temperature Tp1 time:

[0119] 1) When Tp is less than or equal to Tp1, that is, the current compressor high-low pressure difference is not balanced, the system state is unstable, the current system open loop control logic is maintained, and the compressor has sufficient suction superheat degree and reliable operation;

[0120] 2) When Tp is greater than Tp1, that is, the compressor enters the stable running process, the system open loop control is exited, and the electronic expansion valve target exhaust temperature control logic is executed.

[0121] The first determination unit 120 is further configured to: after exiting the open loop control logic, determine the opening degree change amount of the throttling device of the air conditioner according to the exhaust temperature of the compressor of the air conditioner and the target exhaust temperature.

[0122] Specifically, the execution unit 110 exits the open loop control when the execution of the open loop control logic satisfies that the exhaust temperature of the compressor is greater than the preset exhaust temperature, and the air conditioner executes the target exhaust temperature control logic of the throttling device. The throttling device is, for example, an electronic expansion valve. The opening degree change amount of the throttling device is determined through the target exhaust temperature control of the throttling device.

[0123] When the target exhaust temperature control logic of the throttling device is executed, the target frequency of the compressor is determined according to the indoor environment temperature change rate v, the temperature difference ΔT between the indoor environment temperature and the set temperature, and the current operating frequency f of the compressor; it is judged whether the compressor of the air conditioner enters a protection running state; if it is judged that the compressor is in a protection running state, the compressor is controlled to operate at a preset protection frequency; if it is judged that the compressor is not in a protection running state, the compressor is controlled to operate at the target frequency. The target frequency fgoal of the compressor = f + f FC , wherein f is the current operating frequency f of the compressor, f FC is the compressor frequency fuzzy control correction amount, which is determined according to the indoor environment temperature change rate v and the temperature difference ΔT between the indoor environment temperature and the set temperature, and can be determined by a ΔT-v fuzzy control table determined through experiments. The ΔT-v fuzzy control table is a corresponding relationship table in which different indoor environment temperature change rates v and different temperature differences ΔT between indoor environment temperature and set temperature correspond to different compressor frequency fuzzy control correction amounts.

[0124] In one specific embodiment, the first determining unit 120 determines the opening degree change amount of the throttling device corresponding to the frequency difference according to the temperature difference ΔTp=Tp-Tpgoal of the current discharge temperature Tp of the compressor and the target discharge temperature Tpgoal belonging to a preset temperature difference range of two or more temperature difference ranges. Different temperature difference ranges of the two or more temperature difference ranges correspond to different opening degree change amounts of the throttling device.

[0125] ΔTp=Tp-Tpgoal corresponds to different opening degree change amounts ΔP in different temperature difference ranges; ΔP and ΔTp are in a positive correlation, for example, referring to Table 1, the different opening degree change amounts of a certain 3P cabinet machine corresponding to the different temperature difference ranges of the current discharge temperature Tp and the target discharge temperature Tpgoal are shown in the following Table 1, which are determined by experiments:

[0126] Opening change amount ΔP Delta T p = T p - T pgoal ]]> ΔP i ]]> ΔT p ≥ 10 °C ​ 8°C > ΔT p ≥ 4°C 0 4°C > ΔT p -2°C - ΔP1 -2°C > ΔT p > -8°C - ΔP i ]] -16 °C ≥ ΔT p ]]>

[0127] Table 1

[0128] The target discharge temperature can be determined according to the outdoor environment temperature interval to which the current outdoor environment temperature belongs in two or more preset outdoor environment temperature intervals, and the indoor environment temperature interval to which the current indoor environment temperature belongs in two or more preset indoor environment temperature intervals; different outdoor environment temperature intervals in the two or more preset outdoor environment temperature intervals and different indoor environment temperature intervals in the two or more preset indoor environment temperature intervals correspond to different target discharge temperatures.

[0129] Specifically, the target discharge temperature table is determined by temperature combination experiments, and the discharge temperature corresponding to the point with the best capacity and energy efficiency under different outdoor environment temperatures and indoor environment temperatures is taken as the target discharge temperature. For example, refer to the following Table 2:

[0130]

[0131] Table 2

[0132] The target discharge temperature control logic of the throttling device can also refer to Figure 4 . Figure 4 The target discharge temperature control logic of the throttling device (electronic expansion valve) of the present application is shown in the following figure: Figure 4 As shown in the figure, the indoor environment temperature change rate v, the temperature difference ΔT of the indoor environment temperature and the set temperature, and the current operating frequency f of the compressor are detected and recorded in real time, and the target frequency fgoal=f+f of the compressor is determined according to the indoor environment temperature change rate v, the temperature difference ΔT of the indoor environment temperature and the set temperature, and the current operating frequency f of the compressor. FCIf the compressor is in the protection running state, the compressor is controlled to run to the protection frequency fprot; the running to the protection frequency fprot can not be completed at one time, at first, it is the frequency reduction protection, such as reducing 2 Hz each time, until the condition of the constant frequency protection is reached, at this time, the corresponding protection frequency is fprot; in addition, when the compressor is in the constant frequency protection running state at first, the current frequency is fprot. The condition of exiting the constant frequency running: the condition of exiting the protection running is reached, such as the inner tube temperature is reduced to a certain value or less. If the compressor is not in the protection running state, the compressor is controlled to run to the target running frequency fgoal.

[0133] The target exhaust temperature is determined according to the current indoor environment temperature and the outdoor environment temperature through the target exhaust temperature table, the current exhaust temperature Tp is detected and recorded, the difference ΔTp=Tp-Tpgoal between the current exhaust temperature Tp and the target exhaust temperature Tpgoal is calculated, and the electronic expansion valve valve opening degree change amount ΔP is determined according to ΔTp; next, the current valve self-adaptive control opening degree PAC is continuously detected and recorded, the electronic expansion valve valve opening degree P=P0+ΔP+P AC is calculated and controlled, and the above feedback control is repeated again, that is, the electronic expansion valve target exhaust temperature control logic, the control is a closed-loop feedback regulation.

[0134] The second determination unit 130 is configured to determine the self-adaptive control opening degree of the throttling device according to the protection running time length of the compressor frequency limiting protection and / or the protection interval time length of the frequency reduction protection, and in combination with the frequency difference between the current running frequency and the target running frequency of the compressor or the frequency difference between the frequency limiting protection frequency and the target running frequency.

[0135] In a specific embodiment, the second determining unit 130 determines the adaptive control opening of the throttling device according to the protection running time of the compressor frequency limiting protection and / or the protection interval time of the frequency reduction protection, in combination with the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency limiting protection frequency and the target operating frequency, including: determining whether the compressor overload frequency reduction protection has just been executed or whether the compressor overload frequency limiting protection has been executed. If it is determined that the compressor overload frequency reduction protection has just been executed, it is determined whether the adaptive control opening of the throttling device needs to be corrected according to whether the protection interval time of the overload frequency reduction protection executed continuously n times is less than the first preset interval time. If it is determined that the compressor overload frequency limiting protection has been executed, it is determined whether the adaptive control opening of the throttling device needs to be corrected according to whether the protection running time of the current compressor overload frequency limiting protection is greater than the first preset protection time. If it is determined that the adaptive control opening of the throttling device needs to be corrected, the adaptive control opening of the throttling device is determined according to the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency limiting protection frequency and the target operating frequency.

[0136] In a specific embodiment, it is determined whether the indoor heat exchanger tube temperature of the air conditioner is less than a first preset temperature value, whether the compressor frequency reduction protection state value of the air conditioner is 0, and / or whether the indoor heat exchanger tube temperature of the air conditioner is greater than or equal to a second preset temperature value. If it is determined that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and the compressor frequency reduction protection state value is not 0, it is determined that the compressor overload frequency reduction protection has just been executed. If it is determined that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and greater than or equal to the second preset temperature value, and the compressor frequency reduction protection state value is 0, it is determined that the compressor overload frequency limiting protection has been executed.

[0137] Specifically, a compressor frequency reduction protection state value i is set in advance to identify whether the compressor is in a frequency reduction protection state, and the initial value of the compressor frequency reduction protection state i = 0. When the compressor frequency reduction protection state value is 0, it indicates that the air conditioner is not in an overload protection state. When the compressor frequency reduction protection state value is 1, it indicates that the air conditioner is in an overload protection state. The first preset temperature value is a frequency reduction protection judgment value, and the second preset temperature value is a frequency limiting protection judgment value. The first preset temperature value is greater than the second preset temperature value.

[0138] If it is determined that the indoor heat exchanger tube temperature Ts of the air conditioner is greater than or equal to the first preset temperature value T1, i.e., the indoor tube temperature of the air conditioner is too high, the compressor overload frequency reduction protection is triggered, the overload frequency reduction protection is executed, and the initial value of the compressor frequency reduction protection state i = 1 is set. Then the target discharge temperature control is continuously executed until the compressor overload frequency reduction protection is exited.

[0139] If it is judged that the indoor heat exchanger tube temperature Ts of the air conditioner is less than the first preset temperature value T1 and the compressor frequency reduction protection state value is not 0, it is determined that the compressor overload frequency reduction protection has just been performed. Ts is less than T1, that is, the indoor tube temperature of the air conditioner does not reach the compressor overload frequency reduction protection condition or has just exited the overload frequency reduction protection, and if the compressor frequency reduction protection state value i is 0, it means that the air conditioner is in a normal running state, and when i is not equal to 0, it means that the air conditioner has just exited the overload frequency reduction protection.

[0140] If it is judged that the indoor heat exchanger tube temperature of the air conditioner is less than the first preset temperature value and greater than or equal to the second preset temperature value, and the compressor frequency reduction protection state value is 0, it is determined that the compressor overload frequency reduction protection is performed. Wherein, Ts is less than T1, that is, the indoor tube temperature of the air conditioner does not reach the compressor overload frequency reduction protection condition or has just exited the overload frequency reduction protection, and if the compressor frequency reduction protection state value i is 0, it means that the air conditioner is in a normal running state, and if Ts is less than T2, that is, the indoor tube temperature of the air conditioner does not reach the compressor overload frequency reduction protection condition or has just exited the overload frequency reduction protection, and the indoor tube temperature is in a normal range, the target discharge temperature control is continued to be performed; if Ts is greater than or equal to T2, that is, the air conditioner triggers the overload frequency reduction protection, the compressor maintains the current frequency operation.

[0141] If it is judged that the indoor heat exchanger tube temperature Ts of the air conditioner is less than the first preset temperature value T1 and the compressor frequency reduction protection state value is not 0, it means that the compressor overload frequency reduction protection has just been exited, the compressor cumulative running time t is detected and recorded, that is, the interval time from the last time the overload frequency reduction protection is exited (wherein the t recorded for the first time is the interval time from the first time the overload frequency reduction protection is exited to the compressor being started), and the compressor overload frequency reduction protection state value i is reset to 0.

[0142] The cycle f(t, n) of the overload frequency reduction protection is determined, that is, the interval time t of the most recent n times of the overload frequency reduction protection is obtained, and the relationship between t and the preset value t1 (the first preset interval length) is judged, that is, whether the protection interval length of the performed overload frequency reduction protection is less than the first preset interval length t1 for n times in succession is judged.

[0143] If t is less than t1 for n times in succession, that is, the cycle of the compressor overload frequency reduction protection is short and the frequency is high, the overload protection occurs frequently, the system is unstable, and the current electronic expansion valve opening control is unreasonable, the adaptive control opening of the throttling device needs to be corrected, the adaptive control opening PAC is corrected subsequently, and the target discharge temperature control logic is continued to be performed.

[0144] If the protection interval t is greater than or equal to t1 at least once in n times, that is, the compressor has a long over-load frequency-reducing protection period, the system is relatively stable, and the current electronic expansion valve opening control is reasonable, the adaptive control opening of the throttling device does not need to be corrected, and the over-load frequency-limiting protection or normal target exhaust temperature control logic is executed according to the inner tube temperature Ts.

[0145] In the case that the indoor heat exchanger tube temperature Ts is less than the first preset temperature value T1 and the compressor frequency-reducing protection state value is 0, if the indoor heat exchanger tube temperature Ts is greater than or equal to the second preset temperature value, the compressor over-load frequency-limiting protection is executed, the compressor maintains the current frequency operation, the over-load frequency-limiting protection operation time s is detected and recorded, and the relationship between s and the first preset protection time s1 is determined. If s is less than or equal to s1, that is, the compressor frequency-limiting protection time is normal, the current operation state is maintained until the indoor tube temperature is lower than T2, the over-load frequency-limiting protection is exited, and the target exhaust temperature control is executed. If s is greater than s1, that is, the compressor frequency-limiting protection time is too long, the indoor tube temperature is continuously high, and the current throttling device (electronic expansion valve opening) may be controlled too small, the adaptive control opening of the throttling device needs to be corrected.

[0146] If it is determined that the adaptive control opening of the throttling device needs to be corrected, the adaptive control opening of the throttling device is determined according to the frequency difference between the current operating frequency and the target operating frequency of the compressor or the frequency difference between the frequency-limiting protection frequency and the target operating frequency. In a specific embodiment, the adaptive control opening of the throttling device corresponding to the frequency difference is determined according to the frequency difference range to which the frequency difference between the current operating frequency and the target operating frequency of the compressor or the frequency difference between the frequency-limiting protection frequency and the target operating frequency belongs among two or more preset frequency difference ranges. Different frequency difference ranges correspond to different adaptive control openings of the throttling device. The current operating frequency f (or the frequency-limiting protection frequency fprot) of the compressor and the target operating frequency fgoal are obtained, the frequency difference Δf = f - fgoal is calculated, and the adaptive control opening P of the throttling device is corrected according to Δf. AC Different frequency difference ranges correspond to different adaptive control openings of the throttling device, for example; as shown in Table 3 below

[0147] Valve adaptive control opening P AC ]]> Δf = f - f goal ]]> P ACi ]]> Δf ≥ 10 Hz P AC1 ]]> 8 Hz > Δf ≥ 4 Hz 0 4 Hz > Δf > -2 Hz - P AC1 ]] -2 Hz ≥ Δf > -8 Hz - P ACi ]] -16 Hz ≥ Δf

[0148] Table 3

[0149] The control unit 140 is configured to control the opening of the throttling device according to the current opening of the throttling device, the determined opening change amount of the throttling device, and the adaptive control opening of the throttling device.

[0150] Specifically, the control unit 140 controls the opening degree of the throttling device to be equal to the sum of the current opening degree P0 of the throttling device, the opening degree variation AP of the throttling device, and the adaptive control opening degree P of the throttling device, P=P0+AP+P AC . AC .

[0151] Optionally, the device 100 further comprises a judging unit (not shown) for judging whether the compressor of the air conditioner is in liquid compression after the opening degree of the throttling device is controlled according to the current opening degree of the throttling device, the determined opening degree variation of the throttling device, and the adaptive control opening degree of the throttling device; and the control unit 140 is further configured to: if the judging unit judges that the compressor is in liquid compression, reduce the adaptive control opening degree; and if the judging unit judges that the compressor is not in liquid compression, continue to control the opening degree of the throttling device according to the current opening degree of the throttling device, the determined opening degree variation of the throttling device, and the adaptive control opening degree of the throttling device.

[0152] Figure 6 The electronic expansion valve adaptive control opening degree correction control logic is shown, specifically, after the air conditioner enters the valve adaptive control opening degree P AC , first detect and record the current compressor current operating frequency f (or frequency protection frequency fprot), target operating frequency fgoal, calculate the difference Af=f-fgoal, and correct the valve adaptive control opening degree PAC according to Af, execute the target discharge temperature control logic, and continue to judge whether the compressor is in liquid compression,

[0153] 1) If the compressor is in liquid compression, that is, the electronic expansion valve valve opening degree is corrected too much, reduce P AC , and continue to determine whether liquid compression occurs;

[0154] 2) If the compressor is not in liquid compression, that is, the electronic expansion valve valve opening degree is reasonably corrected, and no reliability problem occurs, continue to execute the target discharge temperature control logic according to the current P AC .

[0155] The application also provides a storage medium corresponding to the throttling device control method of the air conditioner, which stores a computer program, and the program is executed by a processor to realize the steps of any of the foregoing methods.

[0156] The application also provides an air conditioner corresponding to the throttling device control method of the air conditioner, which comprises a processor, a memory, and a computer program stored on the memory and executable on the processor, and the processor executes the program to realize the steps of any of the foregoing methods.

[0157] The present invention also provides an air conditioner corresponding to the throttling device control device of the air conditioner, including any of the aforementioned throttling device control devices.

[0158] Accordingly, the solution provided by this invention determines the adaptive control opening degree of the throttling device based on the protection runtime of the compressor frequency limiting protection and / or the protection interval of the frequency reduction protection, combined with the frequency difference between the compressor's current operating frequency and the target operating frequency, or the frequency difference between the frequency limiting protection frequency and the target operating frequency; and controls the opening degree of the throttling device based on the current opening degree, the amount of opening degree change, and the adaptive control opening degree. This solves the problem of low priority and low accuracy of electronic expansion valve opening control in existing air conditioners under conditions where overload protection is highly likely, leading to reduced air conditioning system reliability and severe capacity output attenuation. It achieves reliable and comfortable air conditioning operation, extends the service life of the air conditioner, and enhances the user experience.

[0159] According to the technical solution of the present invention, the adaptive control of the electronic expansion valve opening adjustment increment solves the problem of frequent overload protection or continuous low-frequency operation caused by the current fixed valve opening control. Under the premise of ensuring the reliability of the compressor, the air conditioner's capacity and energy efficiency are maximized, the frequency of overload protection is reduced, thereby improving the service life of the air conditioner and enhancing user comfort.

[0160] 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 as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this 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, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0161] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0162] 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, i.e., may be located in one place or distributed over multiple units. Part or all of the units can be selected as needed to achieve the purpose of the embodiment.

[0163] The integrated units, if implemented in the form of software functional units and sold or used as independent products, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the part that contributes to the related art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of 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 method described in the various embodiments of the present application. The aforementioned storage medium includes a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0164] The above only describes the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A method of controlling a throttling device of an air conditioner, characterized by, Comprise: When the air conditioner is running, according to the discharge temperature of the compressor of the air conditioner and the target discharge temperature, the opening degree change amount of the throttling device of the air conditioner is determined; According to the protection running time of the compressor frequency limiting protection and / or the protection interval time of the frequency reduction protection, combined with the frequency difference value of the current operating frequency and the target operating frequency of the compressor or the frequency difference value of the frequency limiting protection frequency and the target operating frequency, the adaptive control opening degree of the throttling device is determined, including: Determine whether the compressor overload frequency reduction protection has just been executed or whether the compressor overload frequency limiting protection is executed; If it is determined that the compressor overload frequency reduction protection has just been executed, whether the adaptive control opening degree of the throttling device needs to be corrected is determined according to whether the protection interval time of the overload frequency reduction protection executed continuously for n times is less than the first preset interval time; or, If it is determined that the compressor overload frequency limiting protection is executed, whether the adaptive control opening degree of the throttling device needs to be corrected is determined according to whether the protection running time of the current compressor overload frequency limiting protection is less than the first preset protection time; If it is determined that the adaptive control opening degree of the throttling device needs to be corrected, the adaptive control opening degree of the throttling device is determined according to the frequency difference value of the current operating frequency or the frequency limiting protection frequency and the target operating frequency of the compressor; According to the current opening degree of the throttling device and the determined opening degree change amount and the adaptive control opening degree of the throttling device, the opening degree of the throttling device is controlled.

2. The method of claim 1, wherein, Also include: After the air conditioner is turned on and runs, a preset open-loop control logic is executed first; After exiting the open-loop control logic, the opening degree change amount of the throttling device of the air conditioner is determined again according to the discharge temperature of the compressor of the air conditioner and the target discharge temperature.

3. The method of claim 2, wherein, Executing the preset open-loop control logic includes: According to the outdoor environment temperature, the indoor environment temperature, the initial target operating frequency of the compressor open-loop running is determined; According to the outdoor environment temperature, the indoor environment temperature and the current operating frequency of the compressor, the initial opening degree of the throttling device of the compressor open-loop running is determined; The compressor of the air conditioner is controlled to run at the initial target operating frequency, and the throttling device is controlled to run at the initial opening degree of the throttling device; When it is detected that the discharge temperature of the compressor is greater than the preset discharge temperature, the preset open-loop control logic is exited.

4. The method according to any one of claims 1 to 3, characterized in that, According to the current discharge temperature of the compressor of the air conditioner and the target discharge temperature, the opening degree change amount of the throttling device of the air conditioner is determined, including: According to the temperature difference value of the current discharge temperature of the compressor and the target discharge temperature in the temperature difference value range belonging to the two or more temperature difference value ranges, the opening degree change amount of the throttling device corresponding to the frequency difference value is determined; Wherein, different temperature difference value ranges in the two or more temperature difference value ranges correspond to different opening degree change amounts of the throttling device; And / or, The target discharge temperature is determined according to the outdoor environment temperature interval belonging to the two or more preset outdoor environment temperature intervals according to the current outdoor environment temperature, and the indoor environment temperature interval belonging to the two or more preset indoor environment temperature intervals according to the current indoor environment temperature; The different outdoor environment temperature intervals in the two or more preset outdoor environment temperature intervals and the different indoor environment temperature intervals in the two or more preset indoor environment temperature intervals correspond to different target exhaust temperatures.

5. The method of claim 1, wherein, determining whether the compressor overload frequency reduction protection has just been performed or the compressor overload frequency limiting protection is performed, comprises: judging whether the indoor heat exchanger pipe temperature of the air conditioner is less than a first preset temperature value, whether the compressor frequency reduction protection state value of the air conditioner is 0, and / or whether the indoor heat exchanger pipe temperature of the air conditioner is greater than or equal to a second preset temperature value; if it is judged that the indoor heat exchanger pipe temperature of the air conditioner is less than the first preset temperature value and the compressor frequency reduction protection state value is not 0, it is determined that the compressor overload frequency reduction protection has just been performed; if it is judged that the indoor heat exchanger pipe temperature of the air conditioner is less than the first preset temperature value and greater than or equal to the second preset temperature value, and the compressor frequency reduction protection state value is 0, it is determined that the compressor overload frequency limiting protection is performed; wherein, when the compressor frequency reduction protection state value is 0, it indicates that the air conditioner is not in the overload protection state; when the compressor frequency reduction protection state value is 1, it indicates that the air conditioner is in the overload protection state; the first preset temperature value is greater than the second preset temperature value; and / or, determining the adaptive control opening degree of the throttling device according to the frequency difference between the current operating frequency or the frequency limiting protection frequency of the compressor and the target operating frequency, comprises: determining the adaptive control opening degree of the throttling device corresponding to the frequency difference according to the frequency difference range to which the frequency difference between the current operating frequency of the compressor and the target operating frequency or the frequency difference between the frequency limiting protection frequency and the target operating frequency belongs in the two or more preset frequency difference ranges; wherein, different frequency difference ranges in the two or more frequency difference ranges correspond to different adaptive control opening degrees of the throttling device.

6. The method according to any of claims 1 to 3, 5, characterized in that, Further comprising: after controlling the opening degree of the throttling device according to the current opening degree of the throttling device and the determined opening degree change amount and adaptive control opening degree of the throttling device, judging whether the compressor of the air conditioner has liquid compression; if it is judged that the compressor has liquid compression, reducing the adaptive control opening degree; if it is judged that the compressor has no liquid compression, continuing to control the opening degree of the throttling device according to the current opening degree of the throttling device and the determined opening degree change amount and adaptive control opening degree of the throttling device.

7. The method of claim 4, wherein, Further comprising: after controlling the opening degree of the throttling device according to the current opening degree of the throttling device and the determined opening degree change amount and adaptive control opening degree of the throttling device, judging whether the compressor of the air conditioner has liquid compression; if it is judged that the compressor has liquid compression, reducing the adaptive control opening degree; if it is judged that the compressor has no liquid compression, continuing to control the opening degree of the throttling device according to the current opening degree of the throttling device and the determined opening degree change amount and adaptive control opening degree of the throttling device.

8. A throttling device control device for an air conditioner, characterized in that, including: The first determining unit is configured to determine a change amount of the opening degree of the throttling device of the air conditioner according to an exhaust temperature of a compressor of the air conditioner and a target exhaust temperature when the air conditioner is running. The second determining unit is configured to determine the adaptive control opening degree of the throttling device according to a protection running time of the compressor frequency limiting protection and / or a protection interval time of the frequency reduction protection, and in combination with a frequency difference between a current running frequency of the compressor and a target running frequency or a frequency difference between a frequency limiting protection frequency and the target running frequency, including: determining whether the compressor overload frequency reduction protection is just performed or the compressor overload frequency limiting protection is performed; if it is determined that the compressor overload frequency reduction protection is just performed, determining whether the adaptive control opening degree of the throttling device needs to be corrected according to whether the protection interval time of the overload frequency reduction protection is less than a first preset interval time for n times in succession; or if it is determined that the compressor overload frequency limiting protection is performed, determining whether the adaptive control opening degree of the throttling device needs to be corrected according to whether the protection running time of the compressor overload frequency limiting protection is less than a first preset protection time; if it is determined that the adaptive control opening degree of the throttling device needs to be corrected, determining the adaptive control opening degree of the throttling device according to the frequency difference between the current running frequency of the compressor and the target running frequency or the frequency difference between the frequency limiting protection frequency and the target running frequency. The control unit is configured to control the opening degree of the throttling device according to the current opening degree of the throttling device and the determined change amount of the opening degree of the throttling device and the adaptive control opening degree of the throttling device.

9. A storage medium, characterized by A computer program is stored on the computer readable medium, and the program is executed by a processor to implement the steps of the method of any one of claims 1-7.

10. An air conditioner characterized by comprising: The air conditioner comprises a processor, a memory, and a computer program stored on the memory and executable on the processor, and the processor implements the steps of the method of any one of claims 1-7 when executing the program, or the air conditioner comprises the control device of claim 8.

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