Air conditioner control method and device, air conditioner and storage medium

Abstract

The invention relates to the technical field of intelligent air conditioners, and discloses an air conditioner control method and device, an air conditioner and a storage medium. Comprising the air supplementing and enthalpy increasing system comprises a main throttling device and an auxiliary throttling device. The method comprises the steps that under the condition that the current compressor operation frequency and the current outdoor temperature of an air conditioner in an operation state are determined to be unchanged, the current side road outlet temperature corresponding to a pipeline between an economic heat exchanger and a compressor and the current exhaust temperature of the air conditioner are obtained; the current main temperature difference and the current auxiliary temperature difference with the corresponding set temperature are obtained; according to the current auxiliary temperature difference, first PID control is carried out to obtain the current auxiliary valve opening degree corresponding to the auxiliary throttling device, and according to the current main temperature difference and parameters corresponding to the first PID control, second PID control is carried out to obtain the current main valve opening degree corresponding to the main throttling device; and according to the current auxiliary valve opening degree and the current main valve opening degree, the corresponding auxiliary throttling device and the main throttling device are controlled to operate.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent air conditioners, for example, to a method, a device, an air conditioner and a storage medium for air conditioner control. Background Art

[0002] Air conditioners are now a must-have appliance for home and office use, especially in summer and winter, when they are used for long periods of time. The air conditioner can be controlled according to the ambient temperature fed back by the temperature acquisition device, including automatic adjustment of output mode, compressor operating frequency, fan speed and other parameters.

[0003] The air-injection and re-enthalpy technology in air conditioners is to add an economizer (economic heat exchanger) after the condenser and before the throttling device on the basis of normal system operation, extract a part of the medium-temperature and high-pressure liquid through a small throttling device to become low-temperature and low-pressure, and then exchange heat in the economizer to form medium-temperature and low-pressure gas, which is sent back to the compressor in advance to reduce the operating temperature of the compressor, thereby improving the operating efficiency. However, at present, the air-injection and re-enthalpy technology in air conditioners is mainly used alone in refrigeration or heating, using a single throttling device PID adjustment. Since it has only one independent variable, the closed-loop control is relatively simple. For refrigeration and heating, the air-injection and re-enthalpy technology is applied to the product at the same time, and the exhaust temperature and air-injection flow are jointly controlled by two throttling devices. If each throttling device corresponds to a separate PID control, it will cause the system steady-state process to be relatively long, resulting in a relatively low air conditioning control accuracy.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The disclosed embodiments provide a method, device, air conditioner and storage medium for air conditioning control to solve the technical problem that the stability of the air-injection enthalpy-increasing system in the air conditioner needs to be improved. The air conditioner includes an economic heat exchanger for air-injection enthalpy-increasing, a first throttling device located between the economic heat exchanger and the outdoor heat exchanger, and a second throttling device located between the economic heat exchanger and the indoor heat exchanger.

[0007] In some embodiments, the method comprises:

[0008] Under the condition that the current compressor operating frequency of the air conditioner in operation and the current outdoor temperature remain unchanged, the current auxiliary road outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor and the current exhaust temperature of the air conditioner are obtained, and the current main temperature difference between the current exhaust temperature and the set exhaust temperature and the current auxiliary temperature difference between the current auxiliary road outlet temperature and the set auxiliary road outlet temperature are obtained;

[0009] According to the current auxiliary temperature difference, a first PID control is performed to obtain the current auxiliary valve opening corresponding to the auxiliary throttling device, and, according to the current main temperature difference and the parameters corresponding to the first PID control, a second PID control is performed to obtain the current main valve opening corresponding to the main throttling device;

[0010] According to the current auxiliary valve opening and the current main valve opening, the corresponding auxiliary throttling device and the main throttling device are controlled to operate respectively;

[0011] Among them, the main throttling device is one of the first throttling device and the second throttling device, and the auxiliary throttling device is the other of the first throttling device and the second throttling device.

[0012] In some embodiments, it also includes:

[0013] When it is determined that the air conditioner is turned on, a first valve opening corresponding to the first throttling device and a second valve opening corresponding to the second throttling device are obtained, and a first exhaust temperature is obtained;

[0014] When the first valve opening and the second valve opening are reduced separately, a second exhaust temperature and a third exhaust temperature are obtained after the air conditioner is operated for a corresponding set time;

[0015] According to the first exhaust gas temperature, the second exhaust gas temperature and the third exhaust gas temperature, one of the first throttling device and the second throttling device is determined as the main throttling device, and the other is determined as the auxiliary throttling device.

[0016] In some embodiments, determining one of the first throttling device and the second throttling device as the main throttling device and the other as the auxiliary throttling device comprises:

[0017] Obtaining a first temperature difference between a second exhaust temperature and a first exhaust temperature, wherein the second exhaust temperature is obtained when a first operating time of the air conditioner reaches a first set value when the first valve opening is reduced by a set value and the second valve opening remains unchanged;

[0018] A second temperature difference between the third exhaust temperature and the first exhaust temperature is obtained, wherein the third exhaust temperature is obtained when the second operating time of the air conditioner reaches the second set value while the first valve opening is kept unchanged and the second valve opening is reduced by a set value.

[0019] When the first temperature difference is greater than or equal to the second temperature difference, the first throttling device is determined as the main throttling device, and the second throttling device is determined as the auxiliary throttling device;

[0020] When the first temperature difference is smaller than the second temperature difference, the second throttling device is determined as the main throttling device, and the first throttling device is determined as the auxiliary throttling device.

[0021] In some embodiments, obtaining the current auxiliary line outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor, and the current exhaust temperature of the air conditioner includes:

[0022] Obtain the current auxiliary outlet temperature of the pipeline between the economic heat exchanger and the compressor, and update the number of acquisitions recorded;

[0023] When the updated acquisition times are greater than the set times, the current exhaust temperature of the air conditioner is acquired, and the recorded acquisition times are cleared.

[0024] In some embodiments, it also includes:

[0025] After obtaining the current auxiliary road outlet temperature, the current auxiliary road temperature difference between the current auxiliary road outlet temperature and the set auxiliary road outlet temperature is obtained;

[0026] When the current auxiliary temperature difference is less than the set temperature difference, the current exhaust temperature of the air conditioner is obtained.

[0027] In some embodiments, obtaining the current auxiliary valve opening corresponding to the auxiliary throttling device includes:

[0028] According to the current auxiliary temperature difference and the previous auxiliary temperature difference, the parameters P corresponding to the first PID control are obtained through formula (1): f ,I f , D f ;

[0029] The parameter P f ,I f , D f The sum of the auxiliary adjustment opening ΔV f , and adjust the auxiliary opening ΔV f The sum of the opening of the auxiliary valve and the previous auxiliary valve opening is determined as the current auxiliary valve opening;

[0030] P f =K pf *e n ,I f =K if *e n-1 , D f =K df *(e n -e n-1 ) (1)

[0031] Among them, K pf , K if , K df is the coefficient, e n is the current auxiliary temperature difference, e n-1 is the previous auxiliary temperature difference.

[0032] In some embodiments, obtaining the current main valve opening corresponding to the main throttling device includes:

[0033] According to the current main temperature difference, the previous main temperature difference, and the parameter P corresponding to the first PID control f ,I f , D f , through formula (2), we can get the parameters P corresponding to the second PID control respectively z ,I z , D z ;

[0034] The parameter P z ,I z , D z The sum of the two determines the main adjustment opening ΔV z , and adjust the main opening ΔV z The sum of the previous main valve opening is determined as the current main valve opening;

[0035] P z =K pz *E n -K f* P f ,I z =K iz *E n-1 , D z =K dz *(E n -E n-1 )-K f *D f (2)

[0036] Among them, Kpz, Kiz, Kdz are coefficients, E n is the current main temperature difference, E n-1 is the previous main temperature difference.

[0037] In some embodiments, it also includes:

[0038] When it is determined that any one of the current compressor operating frequency and the current outdoor temperature of the air conditioner in operation has changed, an initial main valve opening and an initial auxiliary valve opening that match the current compressor operating frequency and the current outdoor temperature are determined;

[0039] The first PID control and the second PID control are reset, and the initial auxiliary temperature difference and the initial main temperature difference are reset.

[0040] In some embodiments, the device for air conditioning control includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for air conditioning control when executing the program instructions.

[0041] In some embodiments, the air conditioner includes an air conditioner body; the above-mentioned device for air conditioner control is installed on the air conditioner body.

[0042] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the above-mentioned method for air conditioning control is executed.

[0043] The method, device and air conditioner for air conditioning control provided by the embodiments of the present disclosure can achieve the following technical effects:

[0044] When the air-increasing and reheat-increasing technology is used for an air conditioner including two throttling devices, it can be divided into a main throttling device and a spreading throttling device. In this way, the two throttling devices can be PID controlled at the same time, and the main throttling device can be PID controlled according to the PID control parameters corresponding to the spreading throttling device. That is, nested PID control is adopted to effectively improve the stable speed of the air conditioner outdoor unit, so that the air-increasing and reheat-increasing system equipped with dual throttling devices can reach stability faster.

[0045] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0047] Figure 1 is a structural schematic diagram of an air conditioner including an air supplement and enthalpy increase system provided in an embodiment of the present disclosure;

[0048] Figure 2 is a flow chart of an air conditioning control method provided by an embodiment of the present disclosure;

[0049] Figure 3 It is a schematic diagram of a process for determining the main and auxiliary electronic expansion valves when the air conditioner is started, provided by an embodiment of the present disclosure;

[0050] Figure 4 is a flow chart of an air conditioning control method provided by an embodiment of the present disclosure;

[0051] Figure 5 is a structural schematic diagram of an air conditioning control device provided by an embodiment of the present disclosure;

[0052] Figure 6 is a structural schematic diagram of an air conditioning control device provided by an embodiment of the present disclosure;

[0053] Figure 7 It is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0054] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0055] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0056] Unless otherwise stated, the term "plurality" means two or more.

[0057] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0058] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0059] The air conditioner adopts the air-injection and reheat-increasing technology, that is, an economic heat exchanger is added after the condenser and before the throttling device, and a throttling device is respectively provided between the economic heat exchanger and the indoor and outdoor heat exchangers. In the disclosed embodiment, the two throttling devices can be divided into a main throttling device and a parallel throttling device. In this way, the two throttling devices can be PID-controlled at the same time, and the main throttling device can be PID-controlled according to the PID control parameters corresponding to the parallel throttling device, that is, nested PID control is adopted, which effectively improves the stable speed of the air conditioner outdoor unit, so that the air-injection and reheat-increasing system equipped with dual throttling devices can reach stability faster.

[0060] Figure 1 Schematic diagram of the structure of an air conditioner including an air supply and enthalpy increase system provided by an embodiment of the present disclosure. Figure 1 As shown, the air conditioner includes: a compressor, an indoor heat exchanger, an outdoor heat exchanger, etc. Moreover, the air conditioner adopts the air supplement and enthalpy increase technology, and therefore, also includes: an economic heat exchanger for air supplement and enthalpy increase, and a first throttling device located between the economic heat exchanger and the outdoor heat exchanger, and a second throttling device located between the economic heat exchanger and the indoor heat exchanger.

[0061] like Figure 1 As shown, there is a one-way valve between the second throttling device and the indoor heat exchanger, so that when the heating is in operation, the refrigerant coming out of the indoor heat exchanger can enter the second device through the one-way valve. Of course, in the embodiments disclosed herein, it is not limited to this. In some embodiments, there may also be a one-way valve between the first throttling device and the outdoor heat exchanger, or there may be one-way valves with different directions between the first throttling device and the indoor heat exchanger and the outdoor heat exchanger, and there may also be one-way valves with different directions between the second throttling device and the indoor heat exchanger and the outdoor heat exchanger. Regardless of how the first throttling device and the second throttling device are connected to the indoor heat exchanger and the outdoor heat exchanger respectively, the air replenishment and enthalpy increase system of the air conditioner in the embodiments disclosed herein includes two throttling devices.

[0062] Therefore, for air conditioners that use air-injection and enthalpy-increasing technology, the exhaust temperature and air-injection path flow are jointly controlled by two throttling devices. In different air-injection and enthalpy-increasing systems, the influence of dual valve adjustment varies. For example: in system A, the exhaust temperature changes by 5°C when the first throttling device is adjusted by 1%, while the exhaust temperature changes by only 1°C when the second throttling device is adjusted by 1%. In system B, the exhaust temperature changes by 5°C when the first throttling device is adjusted by 1%, while the exhaust temperature changes by 8°C when the second throttling device is adjusted by 1%. At this time, it is necessary to consider the valve adjustment time of the two throttling devices. In system A, if the influence of the first throttling device accounts for a large proportion, its valve adjustment cycle will be relatively long. In this case, the first throttling device can be determined as the main throttling device, and the second throttling device can be determined as the auxiliary throttling device. In system B, if the influence of the second throttling device accounts for a large proportion, its valve adjustment cycle will be relatively long. In this case, the first throttling device can be determined as the auxiliary throttling device, and the second throttling device can be determined as the main throttling device.

[0063] In the disclosed embodiment, the valve adjustment process of the auxiliary throttling device can also be nested into the valve adjustment process of the main throttling device. In this way, the probability of long-cycle adjustment caused by dual independent variables is reduced, and the stability of the air replenishment and enthalpy increase system in the air conditioner is improved.

[0064] Figure 2 The present invention provides a flow chart of an air conditioning control method. The air conditioner includes an economic heat exchanger for replenishing air and increasing enthalpy, a first throttling device between the economic heat exchanger and the outdoor heat exchanger, and a second throttling device between the economic heat exchanger and the indoor heat exchanger. Figure 2 As shown, the process of air conditioning control includes:

[0065] Step 201: When determining that the current compressor operating frequency of the air conditioner in operation and the current outdoor temperature remain unchanged, obtain the current auxiliary line outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor, and the current exhaust temperature of the air conditioner, and obtain the current main temperature difference between the current exhaust temperature and the set exhaust temperature, and the current auxiliary temperature difference between the current auxiliary line outlet temperature and the set auxiliary line outlet temperature.

[0066] The air conditioner can have a variety of operating modes, including: cooling, heating, dehumidification, sterilization and other modes. No matter which mode, after the air conditioner is turned on, the operation of the compressor, throttling device, fan and the like of the air conditioner can be controlled according to the indoor ambient temperature, the target temperature and the like, and the operating frequency of the compressor, the valve opening of the throttling device, the speed of the fan and the like can be determined respectively. In the embodiment of the present disclosure, after the air conditioner is turned on and operated for a period of time, that is, after stable operation, the corresponding compressor operating frequency can be basically unchanged, the outdoor temperature is also unchanged, and the valve opening of each throttling device is also basically determined. At this time, air replenishment and enthalpy increase control can be performed, that is, the determined valve opening can be used as the starting valve opening, and PID control can be performed on each throttling device respectively.

[0067] In the embodiment of the present disclosure, before performing PID control on each throttling device to replenish air and increase enthalpy, it is also necessary to determine one of the first throttling device and the second throttling device as the main throttling device and the other as the auxiliary throttling device during the start-up process of the air conditioner. In some embodiments, it may include: when it is determined that the air conditioner is in the start-up state, obtaining the first valve opening corresponding to the first throttling device and the second valve opening corresponding to the second throttling device, and obtaining the first exhaust temperature; when the first valve opening and the second valve opening are reduced separately, obtaining the second exhaust temperature and the third exhaust temperature after the air conditioner has been running for a corresponding set time; according to the first exhaust temperature, the second exhaust temperature and the third exhaust temperature, determining one of the first throttling device and the second throttling device as the main throttling device and the other as the auxiliary throttling device.

[0068] The first throttling device and the second throttling device may have the same structure and correspond to a certain range of valve openings, for example: (0-480), (0-360), etc., of course, they may be different. When the air conditioner is turned on and running, the first throttling device and the second throttling device correspond to a valve opening respectively, which can be collected and obtained, namely the first valve opening and the second valve opening, and the corresponding exhaust temperature at this time, i.e., the first exhaust temperature, can also be obtained.

[0069] Then, the first valve opening and the second valve opening can be reduced separately to obtain the corresponding exhaust temperature, so as to obtain the second exhaust temperature and the third exhaust temperature. Then, the corresponding main throttling device and auxiliary throttling device can be determined according to the obtained first exhaust temperature, second exhaust temperature and third exhaust temperature.

[0070] In some embodiments, determining one of the first throttling device and the second throttling device as the main throttling device and the other as the auxiliary throttling device includes: obtaining a first temperature difference between the second exhaust gas temperature and the first exhaust gas temperature, where the second exhaust gas temperature is obtained when the first operating time of the air conditioner reaches a first set value with the first valve opening reduced by a set value and the second valve opening unchanged; obtaining a second temperature difference between the third exhaust gas temperature and the first exhaust gas temperature, where the third exhaust gas temperature is obtained when the second operating time of the air conditioner reaches a second set value with the first valve opening unchanged and the second valve opening reduced by a set value; when the first temperature difference is greater than or equal to the second temperature difference, determining the first throttling device as the main throttling device and the second throttling device as the auxiliary throttling device; when the first temperature difference is less than the second temperature difference, determining the second throttling device as the main throttling device and the first throttling device as the auxiliary throttling device.

[0071] The set value can be 3, 5, 8, or 10, etc., the first set time can be 5 min, 8 min, or 10 min, etc., and the second set time can be 8 min, 10 min, 12 min, etc. For example: when it is determined that the air conditioner is in the startup state, obtain the first valve opening V1 corresponding to the first throttling device and the second valve opening V2 corresponding to the second throttling device, and obtain the first exhaust gas temperature Tp1. Then, the valve opening of the first throttling device can be adjusted to (V1 - 5), while the valve opening of the second throttling device remains V2, and the air conditioner continues to operate. When the corresponding first operating time reaches 5 min, the corresponding second exhaust gas temperature Tp2 can be obtained at this time, and thus the first temperature difference K1 between the second exhaust gas temperature and the first exhaust gas temperature can be obtained, that is, K1 = Tp2 - Tp1.

[0072] Then, adjust the valve opening of the first throttling device to the original corresponding first valve opening V1, and adjust the valve opening of the second throttling device to (V2 - 5). The air conditioner continues to operate. When the corresponding second operating time reaches 10 min, the corresponding third exhaust gas temperature Tp3 can be obtained at this time, and thus the second temperature difference K2 between the third exhaust gas temperature and the first exhaust gas temperature can be obtained, that is, K2 = Tp3 - Tp1.

[0073] If K1 ≥ K2, the first throttling device can be determined as the main throttling device and the second throttling device as the auxiliary throttling device; if K1 < K2, the second throttling device can be determined as the main throttling device and the first throttling device as the auxiliary throttling device.

[0074] Thus, the main throttling device and the auxiliary throttling device can be determined when the air conditioner is turned on. In this way, after the air conditioner is turned on and runs for a period of time, that is, after stable operation, the main valve opening and auxiliary valve opening that match the stable current compressor operating frequency and the current outdoor temperature are obtained, and the obtained main valve opening and auxiliary valve opening can be determined as the corresponding starting valve opening, and PID control of air replenishment and enthalpy increase is performed on each throttling device.

[0075] When performing PID control on each throttling device to replenish air and increase enthalpy, it is necessary to obtain the current auxiliary line outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor at the current moment, as well as the current exhaust temperature of the air conditioner, and obtain the current main temperature difference between the current exhaust temperature and the set exhaust temperature, as well as the current auxiliary temperature difference between the current auxiliary line outlet temperature and the set auxiliary line outlet temperature.

[0076] Since the air replenishment and enthalpy increase technology in air conditioning is to extract a part of the medium-temperature and high-pressure liquid through the economic heat exchanger, and then change it into low-temperature and low-pressure gas through a small throttling device, and then exchange heat in the economizer to form medium-temperature and low-pressure gas, which is sent back to the compressor in advance, it can be Figure 1 As shown, the pipeline between the economic heat exchanger and the compressor can be determined as the auxiliary road outlet, so that the corresponding current auxiliary road outlet temperature T can be obtained through the temperature acquisition device. dc Of course, we also need to obtain the corresponding current exhaust temperature T dp .

[0077] The air conditioner performs PID control on each throttling device to increase the air enthalpy, which can correspond to a set exhaust temperature T sp and set the paving outlet temperature T sc , thus, the current main temperature difference E between the current exhaust temperature and the set exhaust temperature can be obtained n , that is, E n =T dp -T sp , and obtain the current auxiliary temperature difference e between the current auxiliary outlet temperature and the set auxiliary outlet temperature n =T dc -T sc .

[0078] In the embodiment of the present disclosure, since the influence of the main throttling device accounts for a large proportion in the exhaust temperature and the air supply line flow control process, its valve adjustment cycle will be relatively long. Therefore, the PID control corresponding to the auxiliary throttling device may be performed twice, three times or more times before the PID control corresponding to the main throttling device is performed once. The control can be performed by obtaining the auxiliary line outlet temperature and obtaining the exhaust temperature at different frequencies.

[0079] In some embodiments, obtaining the current auxiliary line outlet temperature corresponding to the pipe between the economic heat exchanger and the compressor, and the current exhaust temperature of the air conditioner includes: obtaining the current auxiliary line outlet temperature corresponding to the pipe between the economic heat exchanger and the compressor, and updating the recorded number of acquisitions; when the updated number of acquisitions is greater than the set number, obtaining the current exhaust temperature of the air conditioner, and clearing the recorded number of acquisitions.

[0080] The setting number can be 3 times, 5 times, or 8 times, etc., which can be determined according to the performance of the air supply enthalpy increase system. In this way, if the current auxiliary outlet temperature is obtained once, the recorded acquisition number can be added by 1, and when the acquisition number after adding 1 is greater than 5 times, the current exhaust temperature of the air conditioner can be obtained. Of course, the recorded acquisition number needs to be cleared to zero, so that in the subsequent PID process, the exhaust temperature is obtained only once after obtaining the auxiliary outlet temperature multiple times.

[0081] In some embodiments, obtaining the current auxiliary line outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor, and the current exhaust temperature of the air conditioner also includes: after obtaining the current auxiliary line outlet temperature, obtaining the current auxiliary temperature difference between the current auxiliary line outlet temperature and the set auxiliary line outlet temperature; when the current auxiliary temperature difference is less than the set temperature difference, obtaining the current exhaust temperature of the air conditioner.

[0082] Of course, the set temperature difference can be 1°C, 2°C, or 3°C, etc. If the current auxiliary temperature difference is less than the set temperature difference, it indicates that the PID control corresponding to the auxiliary throttling device is closer to the target. Therefore, the PID control corresponding to the main throttling device can be performed.

[0083] Step 202: Perform a first PID control based on the current auxiliary temperature difference to obtain the current auxiliary valve opening corresponding to the auxiliary throttling device, and perform a second PID control based on the current main temperature difference and the parameters corresponding to the first PID control to obtain the current main valve opening corresponding to the main throttling device.

[0084] The auxiliary throttling device and the main throttling device are respectively subjected to the corresponding PID control of air replenishment and enthalpy increase, which are the first PID control and the second PID control, respectively. The corresponding variables controlled are the temperature difference and the main temperature difference. In addition, the parameters corresponding to the first PID control are embedded in the second PID control of the main throttling device, that is, the valve adjustment process of the auxiliary throttling device is nested in the valve adjustment process of the main throttling device. In this way, the probability of long-term adjustment caused by double independent variables is reduced, and the stability of the air replenishment and enthalpy increase system in the air conditioner is improved.

[0085] In some embodiments, obtaining the current auxiliary valve opening corresponding to the auxiliary throttling device includes: according to the current auxiliary temperature difference and the previous auxiliary temperature difference, the parameters P corresponding to the first PID control are obtained by formula (1). f ,I f , Df ; Set the parameter P f ,I f , D f The sum of the auxiliary adjustment opening ΔV f , and adjust the auxiliary opening ΔV f The sum of the previous auxiliary valve opening is determined as the current auxiliary valve opening.

[0086] P f =K pf *e n ,I f =K if *e n-1 , D f =K df *(e n -e n-1 ) (1)

[0087] Among them, K pf , K if , K df is the coefficient, e n is the current auxiliary temperature difference, e n-1 is the previous auxiliary temperature difference.

[0088] Since the variable of the first PID control is the temperature difference of the floor, each time the auxiliary temperature difference is obtained, it is recorded. The current moment corresponds to the current temperature difference e n , and the auxiliary temperature difference obtained during the previous control is the previous auxiliary temperature difference e n-1 Then, the parameter P corresponding to the first PID control can be obtained by formula (1): f ,I f , D f Then, auxiliary adjustment of the opening ΔV f＝ P f +I f +D f Since each PID control is based on the previous one, the current auxiliary valve opening V fn =V fn-1 +ΔV f .

[0089] In some embodiments, obtaining the current main valve opening corresponding to the main throttling device includes: according to the current main temperature difference, the previous main temperature difference, and the parameter P corresponding to the first PID control f ,I f , D f , through formula (2), we can get the parameters P corresponding to the second PID control respectively z ,I z , D z ; Set the parameter P z ,I z , Dz The sum of the two determines the main adjustment opening ΔV z , and adjust the main opening ΔV z The sum of the previous main valve opening is determined as the current main valve opening.

[0090] P z =K pz *E n -K f* P f ,I z =K iz *E n-1 , D z =K dz *(E n -E n-1 )-K f *D f (2)

[0091] Among them, Kpz, Kiz, Kdz are coefficients, E n is the current main temperature difference, E n-1 is the previous main temperature difference.

[0092] Similarly, since the variable of the second PID control is the main temperature difference, each time the main temperature difference is obtained, it is recorded, and the current time corresponds to the current main temperature difference E n , and the auxiliary temperature difference obtained during the previous control is the previous main temperature difference E n-1 And, the parameter P corresponding to the first PID control has been obtained f ,I f , D f , then the parameter P corresponding to the second PID control can be obtained by formula (2): z ,I z , D z Then, the main adjustment opening ΔV z＝ P z +I z +D z Since each PID control is based on the previous one, the current main valve opening V zn =V zn-1 +ΔV z .

[0093] It can be seen that the parameter P corresponding to the second PID control is determined by formula (2): z ,I z , D, the parameter P corresponding to the first PID control needs to be applied f ,I f , D f, that is, the valve adjustment process of the auxiliary throttling device is nested into the valve adjustment process of the main throttling device. In this way, the probability of long-cycle adjustment caused by double independent variables is reduced, and the stability of the air-supplying and enthalpy-increasing system in the air conditioner is improved.

[0094] Step 203: According to the current auxiliary valve opening and the current main valve opening, the corresponding auxiliary throttling device and the main throttling device are controlled to operate respectively.

[0095] The current main valve opening V has been determined zn , and the current auxiliary valve opening V fn Therefore, the valve opening of the main throttling device can be adjusted to V zn and adjust the valve opening of the auxiliary main throttling device to V fn , and continue to operate the air conditioner. At the same time, during the operation, continue to perform PID control of the throttling device.

[0096] It can be seen that in the disclosed embodiment, the two throttling devices of the air conditioner can be PID controlled at the same time, and the main throttling device can be PID controlled according to the PID control parameters corresponding to the throttling devices, that is, nested PID control is adopted to effectively improve the stable speed of the air conditioner outdoor unit, so that the air-increasing enthalpy-increasing system equipped with dual throttling devices can reach stability faster. In addition, after performing PID control of the throttling devices for multiple times, the PID control of the main throttling device can be performed, so as to further speed up the process of the air-increasing enthalpy-increasing system reaching stability and improve the accuracy of air conditioning control.

[0097] Since each PID control is based on the previous one, it is necessary to determine the initial values ​​of the PID control variables, that is, determine E0 and e0, and also determine the initial valve opening corresponding to the main throttling device and the throttling device, V z0 and V f0 Among them, E0 and e0 can be determined according to the performance of the air conditioning air supply enthalpy increase system and can be preset. z0 and V f0 It can be matched with the current compressor operating frequency and the current outdoor temperature after stabilization.

[0098] The corresponding relationship between the outdoor temperature, the compressor operating frequency, the operating mode and the initial valve opening corresponding to the main throttling device and the throttling device can be saved in advance, and then, according to the corresponding relationship, the V matching the current operating mode, the current compressor operating frequency and the current outdoor temperature can be determined. z0 and V f0 .

[0099] Table 1 is a correspondence between outdoor temperature, compressor operating frequency, operating mode and initial valve opening of the throttling device provided by an embodiment of the present disclosure.

[0100]

[0101] Table 1

[0102] Where Tao is the outdoor temperature and frequency is the compressor operating frequency. In this way, if the air conditioner is in cooling operation, if the current outdoor temperature is 35°C and the current compressor operating frequency is 85Hz, then V can be determined according to Table 1. z0 =381, and V f0 =149. If the air conditioner is in heating mode, the current outdoor temperature is 3°C and the current compressor operating frequency is 105Hz, then V can be determined according to Table 1. z0 =282, and V f0 =108.

[0103] Of course, if the current outdoor temperature or the current compressor operating frequency changes, the corresponding V z0 and V f0 It will also change, therefore, in some embodiments, it also includes: when it is determined that any one of the current compressor operating frequency and the current outdoor temperature of the air conditioner in operation has changed, determining the initial main valve opening and the initial auxiliary valve opening that match the current compressor operating frequency and the current outdoor temperature; resetting the first PID control and the second PID control, and resetting the initial auxiliary temperature difference and the initial main temperature difference.

[0104] Wherein, resetting the first PID control includes clearing the recorded acquisition times to zero.

[0105] Of course, since each PID control is based on the previous one, after obtaining the current main valve opening and the current auxiliary valve opening, the current main temperature difference and the current auxiliary temperature difference need to be saved as the previous main temperature difference and the previous auxiliary temperature difference, so as to continue the corresponding PID control later.

[0106] The operation flow is collected into a specific embodiment below to illustrate the air conditioning control process provided by the embodiment of the present invention.

[0107] In one embodiment of the present disclosure, the air conditioner can be Figure 1 As shown, the first throttling device and the second throttling device can be a first electronic expansion valve and a second electronic expansion valve respectively, and the set value can be 5, the first set value can be 5min, and the second set value can be 10min.

[0108] Figure 3 1 is a schematic diagram of a process flow for determining the main and auxiliary electronic expansion valves when the air conditioner is started, provided by an embodiment of the present disclosure. Figure 3 As shown in the figure, when the air conditioner is started, the process of determining the main and auxiliary electronic expansion valves includes:

[0109] Step 301: The air conditioner is turned on and started to run, and a first valve opening V1 corresponding to a first electronic expansion valve and a second valve opening V2 corresponding to a second electronic expansion valve are obtained, and a first exhaust temperature Tp1 is obtained.

[0110] Step 302: the air conditioner operates according to a first valve opening strategy, wherein the first valve opening strategy includes: the valve opening of the first electronic expansion valve is (V1-5), and the valve opening of the second electronic expansion valve is still V2.

[0111] Step 303: Has the first operation time of the air conditioner matching the first valve opening strategy reached 5 minutes? If so, execute step 304; otherwise, return to step 302.

[0112] Step 304: the air conditioner acquires the second exhaust temperature Tp1, and obtains a first temperature difference K1 between the second exhaust temperature and the first exhaust temperature, ie, K1 = Tp2-Tp1.

[0113] Step 305: the air conditioner operates according to the second valve opening strategy, wherein the first valve opening strategy includes: the valve opening of the first electronic expansion valve is still V1, and the valve opening of the second electronic expansion valve is (V2-5).

[0114] Step 306: Has the second operation time of the air conditioner matching the second valve opening strategy reached 10 minutes? If so, execute step 307; otherwise, return to step 305.

[0115] Step 307: the air conditioner obtains the third row temperature Tp3, and obtains a second temperature difference K2 between the third exhaust temperature and the first exhaust temperature, ie, K2 = Tp3 - Tp1.

[0116] Step 308: Determine whether K1≥K2 holds. If so, execute step 309; otherwise, execute step 210.

[0117] Step 309: The air conditioner determines the first electronic expansion valve as the main electronic expansion valve, and determines the second electronic expansion valve as the auxiliary electronic expansion valve.

[0118] Step 310: The air conditioner determines the second electronic expansion valve as the main electronic expansion valve, and the first electronic expansion valve as the auxiliary electronic expansion valve.

[0119] In this way, each time the air conditioner is turned on, the main and auxiliary electronic expansion valves can be determined, so that in the air conditioner operation control, the electronic expansion valves can be subjected to nested PID control. The set temperature is 2, and the corresponding relationship shown in Table 1 is saved in the air conditioner.

[0120] Figure 4 FIG. 1 is a flow chart of an air conditioning control method provided by an embodiment of the present disclosure. Figure 4 As shown, the air conditioning control process includes:

[0121] Step 401: The air conditioner in operation obtains the current compressor operating frequency and the current outdoor temperature.

[0122] Step 402: Compare the current compressor operating frequency and the previous outdoor temperature to determine whether any one of the current compressor operating frequency and the current outdoor temperature has changed. If so, execute step 403; otherwise, execute step 404.

[0123] Step 403: According to Table 1, the air conditioner determines the initial main valve opening V that matches the current compressor operating frequency and the current outdoor temperature. z0 and initial auxiliary valve opening V f0 , and reset the first PID control and the second PID control, and reset the initial main temperature difference E0 and the initial auxiliary temperature difference e0. Return to step 401.

[0124] Step 404: The air conditioner obtains the current auxiliary outlet temperature T corresponding to the pipeline between the economic heat exchanger and the compressor dc , and obtain the current auxiliary temperature difference e between the current auxiliary outlet temperature and the set auxiliary outlet temperature n .

[0125] Step 405: The air conditioner adjusts the temperature according to the current auxiliary temperature difference e n 、Previous auxiliary temperature difference e n-1 , through formula (1), we can get the parameters P corresponding to the first PID control respectively f ,I f , D f , and set the parameter P f ,I f , D f The sum of the auxiliary adjustment opening ΔV f , and adjust the auxiliary opening ΔV f The sum of the previous auxiliary valve opening is determined as the current auxiliary valve opening V fn .

[0126] P f =K pf *e n ,I f =K if *e n-1 , D f =K df *(e n -e n-1 ) (1)

[0127] Among them, K pf , K if , K df is the coefficient, e n is the current auxiliary temperature difference, e n-1Auxiliary adjustment of opening ΔV for the previous auxiliary temperature difference f＝ P f +I f +D f , current auxiliary valve opening V fn =V fn-1 +ΔV f .

[0128] In step 403, the initial value for PID control has been determined, including: the initial auxiliary valve opening V f0 And the initial auxiliary temperature difference e0, therefore, the variables of PID control have initial values.

[0129] Step 406: The air conditioner adjusts the auxiliary valve opening V according to the current auxiliary valve opening V. fn , control the auxiliary electronic expansion valve to operate, add 1 to the recorded acquisition times, get the updated acquisition times, and set the current auxiliary temperature difference e n Save as the previous auxiliary temperature difference n-1 , the front auxiliary valve opening V fn Save as the last auxiliary valve opening V fn-1 .

[0130] Step 407: Determine whether the updated acquisition times are greater than 5. If yes, go to step 409; otherwise, go to step 408.

[0131] Step 408: Determine the current auxiliary temperature difference e before saving n <2 Is it true? If so, execute step 409, otherwise, return to step 404.

[0132] Step 409: The air conditioner obtains the current exhaust temperature T of the air conditioner dp , and get the current exhaust temperature T dp With the set exhaust temperature T sp The current main temperature difference E n .

[0133] Among them, E n =T dp -T sp .

[0134] Step 410: The air conditioner is set according to the current main temperature difference E n , the previous main temperature difference E n-1 , and the corresponding parameter P of the first PID control f ,I f , D f , through formula (2), we can get the parameters P corresponding to the second PID control respectively z ,I z , D z ; and set the parameter P z ,I z , Dz The sum of the two determines the main adjustment opening ΔV z , and adjust the main opening ΔV z The sum of the previous main valve opening is determined as the current main valve opening V z .

[0135] P z =K pz *E n -K f* P f ,I z =K iz *E n-1 , D z =K dz *(E n -E n-1 )-K f *D f (2)

[0136] Among them, Kpz, Kiz, Kdz are coefficients, E n is the current main temperature difference, E n-1 is the previous main temperature difference.

[0137] Main adjustment opening ΔV z＝ P z +I z +D z , current main valve opening V zn =V zn-1 +ΔV z .

[0138] Similarly, in step 403, the initial values ​​for PID control have been determined, including: the initial main valve opening V z0 And the initial main temperature difference E0.

[0139] Step 411: The air conditioner is set according to the current main valve opening V zn , control the operation of the main electronic expansion valve, clear the number of acquisitions recorded, and set the current main temperature difference E n Save as the previous main temperature difference E n-1 , open the front main valve V zn Save as the previous main valve opening V zn-1 . Return to step 401.

[0140] It can be seen that in this embodiment, the air-inflation and heat-increasing system of the air conditioner includes two electronic expansion valves, from which the main and auxiliary electronic expansion valves are determined, and the corresponding PID control can be performed on the main and auxiliary electronic expansion valves respectively, wherein the main electronic expansion valve can be PID-controlled according to the PID control parameters corresponding to the auxiliary electronic expansion valve, that is, the nested PID control is adopted, which effectively improves the stable speed of the air conditioner outdoor unit, so that the air-inflation and heat-increasing system equipped with dual electronic expansion valves can reach stability faster. In addition, after performing the PID control of the electronic expansion valves for multiple times, the PID control of the main electronic expansion valve can be performed, so that the process of the air-inflation and heat-increasing system reaching stability is further accelerated, and the accuracy of air conditioning control is also improved.

[0141] According to the above process for air conditioning control, a device for air conditioning control can be constructed.

[0142] Figure 5 is a structural diagram of an air conditioning control device provided by an embodiment of the present disclosure. The air conditioner includes an economic heat exchanger for replenishing air and increasing enthalpy, a first throttling device located between the economic heat exchanger and the outdoor heat exchanger, and a second throttling device located between the economic heat exchanger and the indoor heat exchanger. Figure 5 As shown, the air conditioning control device 500 includes: a parameter acquisition module 510 , a valve opening determination module 520 and a first control module 530 .

[0143] The parameter acquisition module 510 is configured to obtain the current auxiliary line outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor, and the current exhaust temperature of the air conditioner, and obtain the current main temperature difference between the current exhaust temperature and the set exhaust temperature, and the current auxiliary temperature difference between the current auxiliary line outlet temperature and the set auxiliary line outlet temperature, while determining that the current compressor operating frequency of the air conditioner in operation and the current outdoor temperature remain unchanged.

[0144] The valve opening determination module 520 is configured to perform a first PID control according to the current auxiliary temperature difference to obtain the current auxiliary valve opening corresponding to the auxiliary throttling device, and to perform a second PID control according to the current main temperature difference and the parameters corresponding to the first PID control to obtain the current main valve opening corresponding to the main throttling device.

[0145] The first control module 530 is configured to control the operation of the corresponding auxiliary throttling device and the main throttling device according to the current auxiliary valve opening and the current main valve opening.

[0146] Among them, the main throttling device is one of the first throttling device and the second throttling device, and the auxiliary throttling device is the other of the first throttling device and the second throttling device.

[0147] In some embodiments, it also includes:

[0148] The startup acquisition module is configured to acquire a first valve opening corresponding to the first throttling device and a second valve opening corresponding to the second throttling device, and acquire a first exhaust temperature when it is determined that the air conditioner is started.

[0149] The adjustment acquisition module is configured to acquire the second exhaust temperature and the third exhaust temperature after the air conditioner has been running for a corresponding set time, when the first valve opening and the second valve opening are reduced respectively;

[0150] The main-auxiliary determination module is configured to determine one of the first throttling device and the second throttling device as the main throttling device and the other as the auxiliary throttling device according to the first exhaust temperature, the second exhaust temperature and the third exhaust temperature.

[0151] In some embodiments, the primary and secondary determination module includes:

[0152] The first determination unit is configured to obtain a first temperature difference between a second exhaust temperature and the first exhaust temperature, wherein the second exhaust temperature is obtained when the first operating time of the air conditioner reaches a first set value when the first valve opening is reduced by a set value and the second valve opening remains unchanged.

[0153] The second determination unit is configured to obtain a second temperature difference between a third exhaust temperature and the first exhaust temperature, wherein the third exhaust temperature is obtained when the second operating time of the air conditioner reaches a second set value while keeping the first valve opening unchanged and reducing the second valve opening by a set value.

[0154] The main-auxiliary determination unit is configured to determine the first throttling device as the main throttling device and the second throttling device as the auxiliary throttling device when the first temperature difference is greater than or equal to the second temperature difference; and to determine the second throttling device as the main throttling device and the first throttling device as the auxiliary throttling device when the first temperature difference is less than the second temperature difference.

[0155] In some embodiments, the parameter acquisition module 510 includes:

[0156] The first acquisition unit is configured to obtain the current auxiliary line outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor, and update the recorded acquisition times; when the updated acquisition times are greater than the set times, the current exhaust temperature of the air conditioner is obtained, and the recorded acquisition times are cleared.

[0157] In some embodiments, the parameter acquisition module 510 further includes:

[0158] The second acquisition unit is configured to obtain the current auxiliary temperature difference between the current auxiliary temperature and the set auxiliary temperature after obtaining the current auxiliary temperature; when the current auxiliary temperature difference is less than the set temperature difference, obtain the current exhaust temperature of the air conditioner.

[0159] In some embodiments, the valve opening determination module 520 includes:

[0160] The first PID determination unit is configured to obtain the parameters P corresponding to the first PID control according to the current auxiliary temperature difference and the previous auxiliary temperature difference through formula (1): f ,I f , D f ; Set the parameter P f ,I f , D f The sum of the auxiliary adjustment opening ΔV f , and adjust the auxiliary opening ΔV f The sum of the opening of the auxiliary valve and the previous auxiliary valve opening is determined as the current auxiliary valve opening;

[0161] P f =K pf *e n ,I f =K if *e n-1 , D f =K df *(e n -e n-1 ) (1)

[0162] Among them, K pf , K if , K df is the coefficient, e n is the current auxiliary temperature difference, e n-1 is the previous auxiliary temperature difference.

[0163] In some embodiments, the valve opening determination module 520 includes:

[0164] The second PID determination unit is configured to determine the current main temperature difference, the previous main temperature difference, and the parameter P corresponding to the first PID control f ,I f , D f , through formula (2), we can get the parameters P corresponding to the second PID control respectively z ,I z , D z ; Set the parameter P z ,I z , D z The sum of the two determines the main adjustment opening ΔV z , and adjust the main opening ΔV z The sum of the previous main valve opening is determined as the current main valve opening;

[0165] P z =K pz *E n-K f* P f ,I z =K iz *E n-1 , D z =K dz *(E n -E n-1 )-K f *D f (2)

[0166] Among them, Kpz, Kiz, Kdz are coefficients, E n is the current main temperature difference, E n-1 is the previous main temperature difference.

[0167] In some embodiments, it also includes:

[0168] A reset determination module determines an initial main valve opening and an initial auxiliary valve opening that match the current compressor operating frequency and the current outdoor temperature when it is determined that any one of the current compressor operating frequency and the current outdoor temperature of the air conditioner in operation has changed; resets the first PID control and the second PID control, and resets the initial auxiliary temperature difference and the initial main temperature difference.

[0169] It can be seen that in this embodiment, two throttling devices are configured in the air conditioner. When the air conditioner is started and operated, after the main and auxiliary throttling devices are determined, the device for air conditioner control can perform PID control on the two throttling devices of the air conditioner, and can perform PID control on the main throttling device according to the PID control parameters corresponding to the auxiliary throttling devices, that is, nested PID control is adopted to effectively improve the stable speed of the air conditioner outdoor unit, so that the air-supply enthalpy-increasing system equipped with dual throttling devices can reach stability faster. In addition, the PID control of the auxiliary throttling device can be performed multiple times before the PID control of the main throttling device is performed. In this way, the process of the air-supply enthalpy-increasing system reaching stability is further accelerated, and the accuracy of air conditioner control is also improved.

[0170] Combination Figure 6 , the embodiment of the present disclosure provides a device 600 for air conditioning control, comprising:

[0171] The processor 1000 and the memory 1001 may also include a communication interface 1002 and a bus 1003. The processor 1000, the communication interface 1002, and the memory 1001 may communicate with each other through the bus 1003. The communication interface 1002 may be used for information transmission. The processor 1000 may call the logic instructions in the memory 1001 to execute the method for air conditioning control of the above embodiment.

[0172] In addition, the logic instructions in the above-mentioned memory 1001 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0173] The memory 1001 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 1000 executes the function application and data processing by running the program instructions / modules stored in the memory 1001, that is, the method for air conditioning control in the above method embodiment is implemented.

[0174] The memory 1001 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 1001 may include a high-speed random access memory and may also include a non-volatile memory.

[0175] An embodiment of the present disclosure provides an air conditioning control device, comprising: a processor and a memory storing program instructions, wherein the processor is configured to execute an air conditioning control method when executing the program instructions.

[0176] Combination Figure 7 , the embodiment of the present disclosure provides an air conditioner 700, including: an air conditioner body, and the above-mentioned air conditioner control device 500 (600). The air conditioner control device 500 (600) is installed on the air conditioner body. The installation relationship described here is not limited to placement inside the product, but also includes installation connections with other components of the product, including but not limited to physical connections, electrical connections or signal transmission connections. It can be understood by those skilled in the art that the air conditioner control device 500 (600) can be adapted to a feasible air conditioner body, thereby realizing other feasible embodiments.

[0177] An embodiment of the present disclosure provides a storage medium storing program instructions, which, when run, execute the above-mentioned method for air conditioning control.

[0178] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned air conditioning control method.

[0179] The above-mentioned storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0180] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0181] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, individual components and functions are optional, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of the present disclosure includes the entire scope of the claims, and all available equivalents of the claims. When used in this application, although the terms "first", "second", etc. may be used in this application to describe each element, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without changing the meaning of the description, the first element can be called the second element, and similarly, the second element can be called the first element, as long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first element and the second element are both elements, but may not be the same element. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method or device including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0182] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0183] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0184] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for air conditioning control, characterized in that: The air conditioner includes an economic heat exchanger for replenishing air and increasing enthalpy, a first throttling device located between the economic heat exchanger and an outdoor heat exchanger, and a second throttling device located between the economic heat exchanger and an indoor heat exchanger. The method includes: Under the condition that the current compressor operating frequency of the air conditioner in operation and the current outdoor temperature remain unchanged, the current auxiliary road outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor and the current exhaust temperature of the air conditioner are obtained, and the current main temperature difference between the current exhaust temperature and the set exhaust temperature and the current auxiliary temperature difference between the current auxiliary road outlet temperature and the set auxiliary road outlet temperature are obtained; According to the current auxiliary temperature difference, a first PID control is performed to obtain the current auxiliary valve opening corresponding to the auxiliary throttling device, and, according to the current main temperature difference and the parameters corresponding to the first PID control, a second PID control is performed to obtain the current main valve opening corresponding to the main throttling device; According to the current auxiliary valve opening and the current main valve opening, the corresponding auxiliary throttling device and the main throttling device are controlled to operate respectively; Among them, the main throttling device is one of the first throttling device and the second throttling device, and the auxiliary throttling device is the other of the first throttling device and the second throttling device.

2. The method according to claim 1, characterized in that Also includes: When it is determined that the air conditioner is turned on, a first valve opening corresponding to the first throttling device and a second valve opening corresponding to the second throttling device are obtained, and a first exhaust temperature is obtained; When the first valve opening and the second valve opening are reduced separately, a second exhaust temperature and a third exhaust temperature are obtained after the air conditioner is operated for a corresponding set time; According to the first exhaust gas temperature, the second exhaust gas temperature and the third exhaust gas temperature, one of the first throttling device and the second throttling device is determined as the main throttling device, and the other is determined as the auxiliary throttling device.

3. The method according to claim 2, characterized in that The step of determining one of the first throttling device and the second throttling device as the main throttling device and the other as the auxiliary throttling device comprises: Obtaining a first temperature difference between a second exhaust temperature and a first exhaust temperature, wherein the second exhaust temperature is obtained when a first operating time of the air conditioner reaches a first set value when the first valve opening is reduced by a set value and the second valve opening remains unchanged; Obtaining a second temperature difference between the third exhaust temperature and the first exhaust temperature, wherein the third exhaust temperature is obtained when the second operating time of the air conditioner reaches a second set value while the first valve opening remains unchanged and the second valve opening is reduced by a set value; When the first temperature difference is greater than or equal to the second temperature difference, the first throttling device is determined as the main throttling device, and the second throttling device is determined as the auxiliary throttling device; When the first temperature difference is smaller than the second temperature difference, the second throttling device is determined as the main throttling device, and the first throttling device is determined as the auxiliary throttling device.

4. The method according to claim 1, characterized in that The method of obtaining the current auxiliary outlet temperature of the pipeline between the economic heat exchanger and the compressor, and the current exhaust temperature of the air conditioner includes: Obtain the current auxiliary outlet temperature of the pipeline between the economic heat exchanger and the compressor, and update the number of acquisitions recorded; When the updated acquisition times are greater than the set times, the current exhaust temperature of the air conditioner is acquired, and the recorded acquisition times are cleared.

5. The method according to claim 5, characterized in that: Also includes: After obtaining the current auxiliary road outlet temperature, the current auxiliary road temperature difference between the current auxiliary road outlet temperature and the set auxiliary road outlet temperature is obtained; When the current auxiliary temperature difference is less than the set temperature difference, the current exhaust temperature of the air conditioner is obtained.

6. The method according to claim 1, characterized in that The obtaining of the current auxiliary valve opening corresponding to the auxiliary throttling device includes: According to the current auxiliary temperature difference and the previous auxiliary temperature difference, the parameters P corresponding to the first PID control are obtained through formula (1): f ,I f , D f ; The parameter P f ,I f , D f The sum of the auxiliary adjustment opening ΔV f , and adjust the auxiliary opening ΔV f The sum of the opening of the auxiliary valve and the previous auxiliary valve opening is determined as the current auxiliary valve opening; P f =K pf *e n 、I f =K if *e n-1 、D f =K df *(e n -e n-1 ) (1) Among them, K pf , K if , K df is the coefficient, e n is the current auxiliary temperature difference, e n-1 is the previous auxiliary temperature difference.

7. The method according to claim 6, characterized in that The obtaining of the current main valve opening corresponding to the main throttling device comprises: According to the current main temperature difference, the previous main temperature difference, and the parameter P corresponding to the first PID control f ,I f , D f , through formula (2), we can get the parameters P corresponding to the second PID control respectively z ,I z , D z ; The parameter P z ,I z , D z The sum of the two determines the main adjustment opening ΔV z , and adjust the main opening ΔV z The sum of the previous main valve opening is determined as the current main valve opening; P z =K pz *E n -K f* P f 、I z =K iz *E n-1 、D z =K dz *(E n -E n-1 )-K f *D f (2) Among them, Kpz, Kiz, Kdz are coefficients, E n is the current main temperature difference, E n-1 is the previous main temperature difference.

8. The method according to any one of claims 1 to 7, characterized in that: Also includes: When it is determined that any one of the current compressor operating frequency and the current outdoor temperature of the air conditioner in operation has changed, an initial main valve opening and an initial auxiliary valve opening that match the current compressor operating frequency and the current outdoor temperature are determined; The first PID control and the second PID control are reset, and the initial auxiliary temperature difference and the initial main temperature difference are reset.

9. A device for air conditioning control, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to perform the method for air conditioning control as claimed in any one of claims 1 to 8 when executing the program instructions.

10. An air conditioner, characterized in that: include: Air conditioner body; The device for air conditioning control as claimed in claim 9 is installed on the air conditioning body.

11. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for air conditioning control as described in any one of claims 1 to 8 is executed.

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