Method and apparatus for air conditioner control, air conditioner and storage medium

Abstract

The application relates to the technical field of intelligent air conditioners, and discloses a method and device for air conditioner control, an air conditioner and a storage medium. An air conditioner comprising a gas supplementing and enthalpy increasing system comprises a main throttling device and an auxiliary throttling device. The method comprises the following steps: in the case that the current compressor operating frequency of the air conditioner in an operating state and the current outdoor temperature are determined to be constant, the current auxiliary outlet temperature of a pipeline corresponding to an economic heat exchanger and a compressor and the current exhaust temperature of the air conditioner are obtained, and the current main temperature difference and the current auxiliary temperature difference between the corresponding set temperature are obtained; the current auxiliary temperature difference is used for first PID control, the current auxiliary valve opening degree corresponding to the auxiliary throttling device is obtained, the current main temperature difference and the parameters corresponding to the first PID control are used for second PID control, and the current main valve opening degree corresponding to the main throttling device is obtained; and the current auxiliary valve opening degree and the current main valve opening degree are used for respectively controlling the operation of the corresponding auxiliary throttling device and the main throttling device.

Description

Technical Field

[0001] This application relates to the field of intelligent air conditioning technology, such as methods, devices, air conditioners, and storage media for air conditioning control. Background Technology

[0002] Air conditioners are now essential appliances for homes and offices, especially during the summer and winter months when they are used for extended periods. Air conditioners can control their operation based on ambient temperature feedback from temperature sensors, including automatically adjusting parameters such as output mode, compressor operating frequency, and fan speed.

[0003] The enthalpy-increasing technology in air conditioning involves adding an economizer (economic heat exchanger) after the condenser and before the throttling device, based on normal system operation. A portion of the medium-temperature, high-pressure liquid is extracted, passed through a small throttling device to become low-temperature, low-pressure, and then exchanged heat in the economizer to form a medium-temperature, low-pressure gas, which is then sent back to the compressor in advance, lowering the compressor's operating temperature and thus improving operating efficiency. However, currently, enthalpy-increasing technology in air conditioning is mainly applied separately to cooling or heating, using single-throttling device PID control. Because it has only one independent variable, closed-loop control is relatively simple. But when enthalpy-increasing technology is applied to both cooling and heating in a product, the exhaust temperature and the flow rate of the replenishing gas path are jointly controlled by two throttling devices. If each throttling device corresponds to separate PID control, the system's steady-state process will be relatively long, resulting in lower air conditioning control accuracy.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a method, apparatus, air conditioner, and storage medium for air conditioning control, addressing the technical problem of needing to improve the stability of the gas injection enthalpy enhancement system in air conditioning. The air conditioner includes an economic heat exchanger for gas injection enthalpy enhancement, 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.

[0007] In some embodiments, the method includes:

[0008] Given that the current compressor operating frequency of the air conditioner is in operation and the current outdoor temperature remains unchanged, the current auxiliary outlet temperature of the pipe between the economic heat exchanger and the compressor, as well as the current exhaust temperature of the air conditioner, are obtained. 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 outlet temperature and the set auxiliary outlet temperature are also obtained.

[0009] Based on the current auxiliary temperature difference, perform first PID control to obtain the current auxiliary valve opening corresponding to the auxiliary throttling device; and based on the current main temperature difference and the parameters corresponding to the first PID control, perform second PID control to obtain the current main valve opening corresponding to the main throttling device.

[0010] Based on the current opening degree of the auxiliary valve and the current opening degree of the main valve, control the operation of the corresponding auxiliary throttling device and the main throttling device respectively;

[0011] 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, the opening degree of the first valve corresponding to the first throttling device and the opening degree of the second valve corresponding to the second throttling device are obtained, and the first exhaust temperature is obtained.

[0014] By individually reducing the opening degree of the first valve and the opening degree of the second valve, the second exhaust temperature and the third exhaust temperature are obtained after the air conditioner has been running for a set time.

[0015] Based on the first exhaust temperature, the second exhaust temperature, and the third exhaust temperature, one of the first throttling device and the second throttling device is determined to be the main throttling device, and the other is determined to be 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 includes:

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

[0018] The 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, with the first valve opening unchanged and the second valve opening 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 to be the main throttling device and the second throttling device is determined to be the auxiliary throttling device.

[0020] When the first temperature difference is less than the second temperature difference, the second throttling device is determined to be the main throttling device, and the first throttling device is determined to be the auxiliary throttling device.

[0021] In some embodiments, obtaining the current auxiliary 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] Get the current auxiliary outlet temperature of the pipeline between the economic heat exchanger and the compressor, and update the recorded number of times the temperature has been obtained.

[0023] If the updated number of retrievals exceeds the set number, retrieve the current exhaust temperature of the air conditioner and reset the recorded number of retrievals to zero.

[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] If the current auxiliary temperature difference is less than the set temperature difference, obtain the current exhaust temperature of the air conditioner.

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

[0028] Based on 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] Parameter P f I f D f The sum of these values ​​is used to determine the auxiliary adjustment opening ΔV. f And adjust the opening degree ΔV f The sum of the previous auxiliary valve opening degree and the current auxiliary valve opening degree is determined as the current auxiliary valve opening degree.

[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 e is the coefficient n For the current auxiliary temperature difference, e n-1 This refers to the temperature difference between the previous auxiliary equipment and the current auxiliary equipment.

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

[0033] Based on the current primary temperature difference, the previous primary temperature difference, and the parameter P corresponding to the first PID control. f I f D f Using formula (2), the parameters P corresponding to the second PID control are obtained respectively. z I z D z ;

[0034] Parameter P z I z D z The sum of these values ​​determines the main adjustment angle ΔV. z And adjust the main opening ΔV z The sum of the previous main valve opening and the current 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] Where Kpz, Kiz, and Kdz are coefficients, and E n E represents the current primary temperature difference. n-1 This is the previous primary temperature difference.

[0037] In some embodiments, it also includes:

[0038] Given a change in either the current compressor operating frequency or the current outdoor temperature of an air conditioner in operation, determine the initial main valve opening and the initial auxiliary valve opening that match the current compressor operating frequency and the current outdoor temperature.

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

[0040] In some embodiments, the apparatus for air conditioning control includes a processor and a memory storing program instructions, the processor being configured to execute the above-described method for air conditioning control when the program instructions are executed.

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

[0042] In some embodiments, the storage medium stores program instructions that, when executed, perform the above-described method for air conditioning control.

[0043] The method, apparatus, and air conditioner for air conditioning control provided in this disclosure can achieve the following technical effects:

[0044] When using the gas injection enthalpy enhancement technology on an air conditioner that includes two throttling devices, it can be divided into a main throttling device and a secondary throttling device. In this way, both throttling devices can be PID controlled simultaneously, and the main throttling device can be PID controlled according to the PID control parameters corresponding to the secondary throttling device. This is a nested PID control, which effectively improves the stabilization speed of the outdoor unit of the air conditioner, allowing the gas injection enthalpy enhancement system equipped with dual throttling devices to reach stability more quickly.

[0045] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0046] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0047] Figure 1 This is a schematic diagram of the structure of an air conditioner including a gas replenishment and enthalpy enhancement system provided in an embodiment of this disclosure;

[0048] Figure 2 This is a schematic flowchart of an air conditioning control method provided in an embodiment of this disclosure;

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

[0050] Figure 4 This is a schematic flowchart of an air conditioning control method provided in an embodiment of this disclosure;

[0051] Figure 5 This is a schematic diagram of a structure for an air conditioning control device provided in an embodiment of this disclosure;

[0052] Figure 6 This is a schematic diagram of a structure for an air conditioning control device provided in an embodiment of this disclosure;

[0053] Figure 7 This is a schematic diagram of an air conditioner provided in an embodiment of this disclosure. Detailed Implementation

[0054] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0055] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

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

[0057] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0058] The term "and / or" describes an association 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 employs a gas-injection enthalpy enhancement technology, which involves adding an economic heat exchanger after the condenser and before the throttling device. A throttling device is placed between the economic heat exchanger and the indoor / outdoor heat exchangers. In this embodiment, the two throttling devices can be classified as a main throttling device and a secondary throttling device. This allows for simultaneous PID control of both devices, and the main throttling device can be PID controlled based on the PID control parameters corresponding to the secondary throttling device. This nested PID control effectively improves the stabilization speed of the air conditioner's outdoor unit, enabling the gas-injection enthalpy enhancement system with dual throttling devices to reach stability more quickly.

[0060] Figure 1 This is a schematic diagram of an air conditioner including a gas replenishment and enthalpy enhancement system, provided in an embodiment of this disclosure. Figure 1 As shown, the air conditioner includes: a compressor, an indoor heat exchanger, an outdoor heat exchanger, etc. Furthermore, the air conditioner employs gas injection enthalpy enhancement technology; therefore, it also includes: an economical heat exchanger for gas injection enthalpy enhancement, a first throttling device located between the economical heat exchanger and the outdoor heat exchanger, and a second throttling device located between the economical 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, allowing refrigerant from the indoor heat exchanger to enter the second device during heating operation. However, this is not the only embodiment of the present disclosure. In some embodiments, there may also be a one-way valve between the first throttling device and the outdoor heat exchanger, or the first throttling device may have one-way valves with different directions between it and the indoor and outdoor heat exchangers, and the second throttling device may also have one-way valves with different directions between it and the indoor and outdoor heat exchangers. Regardless of how the first and second throttling devices are connected to the indoor and outdoor heat exchangers respectively, the air conditioning enthalpy boosting system in this embodiment of the present disclosure includes two throttling devices.

[0062] Therefore, for air conditioners employing enthalpy-increasing technology, the exhaust temperature and the flow rate of the supplementary gas path are jointly controlled by two throttling devices. The proportion of influence of the two valve adjustments varies in different enthalpy-increasing systems. For example, in system A, a 1% adjustment of the first throttling device results in a 5°C change in exhaust temperature, while a 1% adjustment of the second throttling device results in only a 1°C change. In system B, a 1% adjustment of the first throttling device results in a 5°C change in exhaust temperature, while a 1% adjustment of the second throttling device results in an 8°C change. In this case, the valve adjustment time of the two throttling devices needs to be carefully considered. In system A, where the first throttling device has a larger influence, its valve adjustment cycle should be relatively longer; therefore, the first throttling device can be designated as the primary throttling device, and the second as the secondary throttling device. In system B, where the second throttling device has a larger influence, its valve adjustment cycle should be relatively longer; therefore, the first throttling device can be designated as the secondary throttling device, and the second as the primary throttling device.

[0063] In this embodiment, the valve adjustment process of the auxiliary throttling device can also be nested into the valve adjustment process of the main throttling device. This reduces the probability of long-cycle adjustments caused by dual independent variables and improves the stability of the gas replenishment and enthalpy enhancement system in the air conditioner.

[0064] Figure 2 This is a schematic flowchart of an air conditioning control method provided in an embodiment of this disclosure. The air conditioner includes an economic heat exchanger for replenishing gas 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 2 As shown, the air conditioning control process includes:

[0065] Step 201: Given that the current compressor operating frequency of the air conditioner is in operation and the current outdoor temperature remains unchanged, obtain the current auxiliary outlet temperature of the pipe between the economic heat exchanger and the compressor, 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, and the current auxiliary temperature difference between the current auxiliary outlet temperature and the set auxiliary outlet temperature.

[0066] Air conditioners can operate in various modes, including cooling, heating, dehumidification, and sterilization. Regardless of the mode, after the air conditioner is turned on, the operation of the compressor, throttling device, and fan can be controlled according to the indoor ambient temperature, target temperature, etc., thus determining the compressor's operating frequency, the throttling device's valve opening, the fan speed, etc. In this embodiment, after the air conditioner has been running for a period of time, i.e., after stable operation, the compressor's operating frequency and the outdoor temperature remain essentially constant, and the valve opening of each throttling device is also basically determined. At this point, enthalpy boosting control can be performed, using the determined valve opening as the starting valve opening, and PID control can be applied to each throttling device.

[0067] In this embodiment of the disclosure, before performing PID control to increase enthalpy and replenish gas for each throttling device, it is 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 air conditioner startup process. In some embodiments, this may include: when it is determined that the air conditioner is in the startup state, obtaining the first valve opening degree corresponding to the first throttling device and the second valve opening degree corresponding to the second throttling device, and obtaining the first exhaust temperature; when the first valve opening degree and the second valve opening degree are reduced separately, obtaining the second exhaust temperature and the third exhaust temperature after the air conditioner has been running for a set time; and based on 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 and second throttling devices can have the same structure, corresponding to a certain valve opening range, such as (0-480), (0-360), etc., although they can be different. When the air conditioner is turned on and running, the first and second throttling devices each correspond to a valve opening, which can be collected and obtained, namely the first valve opening and the second valve opening, and the corresponding exhaust temperature at this time can also be obtained, i.e., the first exhaust temperature.

[0069] Then, the opening degree of the first valve and the opening degree of the second valve can be reduced separately to obtain the corresponding exhaust temperature, thereby obtaining the second exhaust temperature and the third exhaust temperature. Then, based on the obtained first exhaust temperature, second exhaust temperature and third exhaust temperature, the corresponding main throttling device and auxiliary throttling device can be determined.

[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 under the condition that the opening of the first valve is reduced by a set value and the opening of the second valve remains 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 under the condition that the opening of the first valve remains unchanged and the opening of the second valve is 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 opening V1 of the first valve corresponding to the first throttling device and the opening V2 of the second valve corresponding to the second throttling device, and obtain the first exhaust gas temperature Tp1. Then, the opening of the first throttling device can be adjusted to (V1 - 5), while the 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 opening of the first throttling device to the original corresponding opening V1, and adjust the 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] Therefore, the main throttling device and the auxiliary throttling device can be determined when the air conditioner is started. After the air conditioner has been running for a period of time, that is, after it has stabilized, the main valve opening and auxiliary valve opening that match the stable current compressor operating frequency and the current outdoor temperature can be obtained. The obtained main valve opening and auxiliary valve opening can be determined as the corresponding starting valve opening, and PID control for enthalpy enhancement of each throttling device can be performed.

[0075] When performing PID control to increase enthalpy by supplementing gas for each throttling device, it is necessary to obtain the current auxiliary outlet temperature of 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, and the current auxiliary temperature difference between the current auxiliary outlet temperature and the set auxiliary outlet temperature.

[0076] Because the enthalpy-increasing technology in air conditioning involves extracting a portion of medium-temperature, high-pressure liquid through an economizer, converting it to low-temperature, low-pressure liquid via a small throttling device, and then exchanging heat in the economizer to form medium-temperature, low-pressure gas, which is then returned to the compressor in advance, it can... Figure 1 As shown, the pipe between the economic heat exchanger and the compressor can be designated as the auxiliary outlet, and the corresponding current auxiliary outlet temperature T can be obtained through a temperature acquisition device. dc Of course, it is also necessary to obtain the corresponding current exhaust temperature T. dp .

[0077] The air conditioner uses PID control to provide corresponding enthalpy boosting for each throttling device, which can be configured to correspond to a set exhaust temperature T. sp and setting the paving outlet temperature T sc Therefore, the current main temperature difference E between the current exhaust temperature and the set exhaust temperature can be obtained. n E n =T dp -T sp And obtain the current auxiliary road outlet temperature difference e between the current auxiliary road outlet temperature and the set auxiliary road outlet temperature. n =T dc -T sc .

[0078] In this embodiment of the disclosure, since the main throttling device has a large influence on the control of exhaust temperature and replenishment flow, its valve adjustment cycle is relatively long. Therefore, the main throttling device can be controlled only once after two, three or more PID controls corresponding to the auxiliary throttling device. This allows control to be achieved by obtaining the auxiliary outlet temperature and the exhaust temperature at different frequencies.

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

[0080] The number of times can be set to 3, 5, or 8, etc., depending on the performance of the supplementary gas enthalpy enhancement system. Thus, if the current auxiliary outlet temperature is obtained once, the recorded number of times is incremented by 1. When the number of times after incrementing by 1 is greater than 5, the current exhaust temperature of the air conditioner can be obtained. Of course, the recorded number of times needs to be reset to zero. This ensures that in subsequent PID processes, the exhaust temperature is obtained only after multiple acquisitions of the auxiliary outlet temperature.

[0081] In some embodiments, 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, further includes: after obtaining the current auxiliary outlet temperature, obtaining the current auxiliary temperature difference between the current auxiliary outlet temperature and the set auxiliary outlet temperature; and if 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℃, 2℃, or 3℃, 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 close to the target. Therefore, the PID control corresponding to the main throttling device can be performed.

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

[0084] PID control for enthalpy enhancement and gas replenishment is applied to the auxiliary throttling device and the main throttling device, respectively, using first PID control and second PID control. The corresponding variables are the primary temperature difference and the main temperature difference, respectively. Furthermore, the parameters corresponding to the first PID control are embedded in the second PID control of the main throttling device, essentially nesting the valve adjustment process of the auxiliary throttling device into the valve adjustment process of the main throttling device. This reduces the probability of long-cycle adjustments caused by dual independent variables and improves the stability of the enthalpy enhancement and gas replenishment system in the air conditioning system.

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

[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 e is the coefficient n For the current auxiliary temperature difference, e n-1 This refers to the temperature difference between the previous auxiliary equipment and the current auxiliary equipment.

[0088] Since the variable controlled by the first PID controller is the auxiliary temperature difference, the auxiliary temperature difference is recorded each time it is obtained. The current time corresponds to the current auxiliary temperature difference e. n 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 through formula (1). f I f D f Then, adjust the opening ΔV. f＝ P f +I f +D f Since each PID control operation 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: based on 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 Using formula (2), the parameters P corresponding to the second PID control are obtained respectively. z I z D z ; Set parameter P z I z Dz The sum of these values ​​determines the main adjustment angle ΔV. z And adjust the main opening ΔV z The sum of the opening degree of the main valve and the previous opening degree is used to determine the current opening degree of the main valve.

[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] Where Kpz, Kiz, and Kdz are coefficients, and E n E represents the current primary temperature difference. n-1 This is the previous primary temperature difference.

[0092] Similarly, since the variable controlled by the second PID controller is the primary temperature difference, the primary temperature difference is recorded each time it is obtained, and the current time corresponds to the current primary temperature difference E. n The auxiliary temperature difference obtained during the previous control is the same as the previous primary temperature difference E. n-1 Furthermore, 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 through formula (2). z I z D z Then, the main adjustment is made to increase the opening ΔV. z＝ P z +I z +D z Since each PID control operation 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 can be determined by formula (2). z I z D requires the application of parameter P corresponding to the first PID control. f I f D fThis involves nesting the valve adjustment process of the auxiliary throttling device into the valve adjustment process of the main throttling device. This reduces the probability of long-cycle adjustments caused by dual independent variables and improves the stability of the gas replenishment and enthalpy enhancement system in the air conditioning system.

[0094] Step 203: Based on the current opening degree of the auxiliary valve and the current opening degree of the main valve, control the operation of the corresponding auxiliary throttling device and the main throttling device 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 The air conditioner continues to operate, and during operation, the PID control of the throttling device continues.

[0096] As can be seen, in this embodiment, PID control can be applied to both throttling devices of the air conditioner simultaneously, and PID control can be applied to the main throttling device based on the PID control parameters corresponding to the secondary throttling devices. This employs nested PID control, effectively improving the stabilization speed of the outdoor unit and enabling the gas replenishment enthalpy enhancement system equipped with dual throttling devices to reach stability more quickly. Furthermore, PID control of the secondary throttling devices can be performed multiple times before PID control of the main throttling device, further accelerating the stabilization process of the gas replenishment enthalpy enhancement system and improving the accuracy of air conditioner control.

[0097] Since each PID control operation is based on the previous one, it is necessary to determine the initial values ​​of the variables for PID control, i.e., E0 and e0. Furthermore, it is also necessary to determine the initial valve openings (V) of the main throttling device and the corresponding secondary throttling device. z0 and V f0 Among them, E0 and e0 can be determined based on the performance of the air conditioning enthalpy boosting system and can be preset. V... z0 and V f0 This allows it to be matched with the current operating frequency of the compressor after it has stabilized and the current outdoor temperature.

[0098] The system can pre-save the correspondence between outdoor temperature, compressor operating frequency, operating mode, and the initial valve opening of the main throttling device and the secondary throttling device. Then, based on the correspondence, it can determine the matching V with the current operating mode, current compressor operating frequency, and current outdoor temperature. z0 and V f0 .

[0099] Table 1 shows the correspondence between outdoor temperature, compressor operating frequency, operating mode and the initial valve opening of the throttling device provided in the embodiments of this disclosure.

[0100]

[0101] Table 1

[0102] Where Tao represents the outdoor temperature and frequency represents the compressor's operating frequency. Therefore, if the air conditioner is operating in cooling mode and the current outdoor temperature is 35℃ 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, and the current outdoor temperature is 3℃ 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 The values ​​will also change. Therefore, in some embodiments, the method further includes: determining an initial main valve opening and an initial auxiliary valve opening that match the current compressor operating frequency and the current outdoor temperature, in the event that either the current compressor operating frequency or the current outdoor temperature changes; resetting the first PID control and the second PID control; and resetting the initial auxiliary temperature difference and the initial main temperature difference.

[0104] Among them, resetting the first PID control includes clearing the recorded acquisition count 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, it is also necessary to save the current main temperature difference and the current auxiliary temperature difference as the previous main temperature difference and the previous auxiliary temperature difference so that the corresponding PID control can be performed in the future.

[0106] The following describes the operation process in a specific embodiment, illustrating the air conditioning control process provided by the embodiments of the present invention.

[0107] In one embodiment of this disclosure, the air conditioner can be as follows: 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 This is a schematic diagram illustrating the process of determining the main and auxiliary electronic expansion valves during air conditioner startup, provided by an embodiment of this disclosure. Figure 3 As shown, the process of determining the main and auxiliary electronic expansion valves when the air conditioner starts includes:

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

[0110] Step 302: The air conditioner operates according to the 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 running time for matching the air conditioner with the first valve opening strategy reached 5 minutes? If yes, proceed to step 304; otherwise, return to step 302.

[0112] Step 304: The air conditioner obtains the second exhaust temperature Tp1 and gets the first temperature difference K1 between the second exhaust temperature and the first exhaust temperature, i.e., 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 running time for matching the air conditioner with the second valve opening strategy reached 10 minutes? If yes, proceed to step 307; otherwise, return to step 305.

[0115] Step 307: The air conditioner obtains the third exhaust temperature Tp3 and gets the second temperature difference K2 between the third exhaust temperature and the first exhaust temperature, i.e., K2 = Tp3 - Tp1.

[0116] Step 308: Determine if K1≥K2 is true. If yes, proceed to step 309; otherwise, proceed to step 210.

[0117] Step 309: The air conditioner determines the first electronic expansion valve as the main electronic expansion valve and 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, the main and auxiliary electronic expansion valves can be determined each time the air conditioner is turned on, thus enabling nested PID control of the electronic expansion valves during air conditioner operation control. The set temperature is 2, and the correspondence shown in Table 1 is stored in the air conditioner.

[0120] Figure 4 This is a schematic flowchart of an air conditioning control method provided in an embodiment of this 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 with the previous temperature to determine whether either the current compressor operating frequency or the current outdoor temperature has changed. If yes, proceed to step 403; otherwise, proceed to 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 The first PID control and the second PID control are reset, and the initial primary temperature difference E0 and the initial secondary temperature difference e0 are also reset. Return to step 401.

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

[0125] Step 405: The air conditioner adjusts the current auxiliary temperature difference e. n Temperature difference between the previous and subsequent auxiliary equipment (e) n-1 Using formula (1), the parameters P corresponding to the first PID control are obtained respectively. f I f D f and parameter P f I f D f The sum of these values ​​is used to determine the auxiliary adjustment opening ΔV. f And adjust the opening degree ΔV f The sum of the previous auxiliary valve opening and the current auxiliary valve opening is determined as 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 e is the coefficient n For the current auxiliary temperature difference, e n-1Adjust the opening ΔV of the auxiliary valve based on 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 values ​​for PID control have been determined, including the initial auxiliary valve opening V. f0 With the initial auxiliary temperature difference e0, the variables controlled by the PID controller have initial values.

[0129] Step 406: The air conditioner adjusts the current auxiliary valve opening V according to the air conditioner's settings. fn Control the operation of the auxiliary electronic expansion valve, increment the recorded acquisition count by 1 to obtain the updated acquisition count, and set the current auxiliary temperature difference e. n Save as the previous auxiliary temperature difference e n-1 Adjust the opening degree V of the front auxiliary valve fn Save as previous auxiliary valve opening V fn-1 .

[0130] Step 407: Determine if the updated number of retrievals is greater than 5. If yes, proceed to step 409; otherwise, proceed to step 408.

[0131] Step 408: Determine the current auxiliary temperature difference e before storage. n Is <2 true? If yes, proceed to step 409; otherwise, return to step 404.

[0132] Step 409: Obtain the current exhaust temperature T of the air conditioner. dp And obtain the current exhaust temperature T. dp With the set exhaust temperature T sp The current principal temperature difference E between n .

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

[0134] Step 410: The air conditioner adjusts its temperature according to the current main temperature difference E. n Previous primary temperature difference E n-1 And the parameter P corresponding to the first PID control obtained. f I f D f Using formula (2), the parameters P corresponding to the second PID control are obtained respectively. z I z D z ; and parameter P z I z Dz The sum of these values ​​determines the main adjustment angle ΔV. z And adjust the main opening ΔV z The sum of the previous main valve opening and the current main valve opening V 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] Where Kpz, Kiz, and Kdz are coefficients, and E n E represents the current primary temperature difference. n-1 This is the previous primary temperature difference.

[0137] Main adjustment opening ΔV z＝ P z +I z +D z The 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 primary temperature difference E0.

[0139] Step 411: The air conditioner adjusts the current main valve opening V according to the air conditioner's settings. zn Control the main electronic expansion valve to operate, clear the recorded number of acquisitions to zero, and set the current main temperature difference E. n Saved as the previous primary temperature difference E n-1 Adjust the opening degree V of the front main valve zn Save as the previous main valve opening V zn-1 Return to step 401.

[0140] As can be seen, in this embodiment, the air conditioning enthalpy boosting system includes two electronic expansion valves, namely a main electronic expansion valve and an auxiliary electronic expansion valve. Each of these valves can be subject to corresponding PID control. Specifically, the main electronic expansion valve can be PID controlled based on the PID control parameters of the auxiliary electronic expansion valve, employing nested PID control. This effectively improves the stabilization speed of the air conditioner's outdoor unit, allowing the enthalpy boosting system with dual electronic expansion valves to reach stability more quickly. Furthermore, multiple PID controls can be performed on the auxiliary electronic expansion valves before PID control of the main electronic expansion valve, further accelerating the stabilization process and improving the accuracy of air conditioning control.

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

[0142] Figure 5 This is a schematic diagram of a structure for an air conditioning control device provided in an embodiment of this disclosure. The air conditioner includes an economic heat exchanger for replenishing gas 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, under the condition that the current compressor operating frequency of the air conditioner in operation is determined and the current outdoor temperature remains unchanged, acquire the current auxiliary outlet temperature corresponding to the pipe 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 outlet temperature and the set auxiliary outlet temperature.

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

[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 opening degree of the auxiliary valve and the current opening degree of the main valve, respectively.

[0146] 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 the first valve opening degree corresponding to the first throttling device and the second valve opening degree corresponding to the second throttling device, and acquire the first exhaust temperature when it is determined that the air conditioner is in the start-up state.

[0149] The acquisition module is adjusted and configured to acquire the second exhaust temperature and the third exhaust temperature after the air conditioner has been running for a set time, by separately reducing the opening of the first valve and the opening of the second valve.

[0150] The primary and secondary throttling device determination module is configured to determine one of the first throttling device and the second throttling device as the primary throttling device and the other as the secondary throttling device based on the first exhaust temperature, the second exhaust temperature and the third exhaust temperature.

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

[0152] The first determining unit is configured to obtain a first temperature difference between the 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 the first set value while the opening of the first valve is reduced by a set value and the opening of the second valve remains unchanged.

[0153] The second determining unit is configured to obtain 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 keeping the first valve opening unchanged and reducing the second valve opening by a set value.

[0154] The primary and secondary throttling device is configured to determine the first throttling device as the primary throttling device and the second throttling device as the secondary 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 primary throttling device and the first throttling device as the secondary 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 acquire the current auxiliary outlet temperature of the pipeline between the economic heat exchanger and the compressor, and update the recorded acquisition count; if the updated acquisition count is greater than the set count, acquire the current exhaust temperature of the air conditioner and clear the recorded acquisition count to zero.

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

[0158] The second acquisition unit is configured to, after acquiring the current auxiliary outlet temperature, obtain the current auxiliary outlet temperature difference between the current auxiliary outlet temperature and the set auxiliary outlet temperature; and, if the current auxiliary outlet temperature difference is less than the set temperature difference, acquire 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, using formula (1). f I f D f ; Set parameter P f I f D f The sum of these values ​​is used to determine the auxiliary adjustment opening ΔV. f And adjust the opening degree ΔV f The sum of the previous auxiliary valve opening degree and the current auxiliary valve opening degree is determined as the current auxiliary valve opening degree.

[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 e is the coefficient n For the current auxiliary temperature difference, e n-1 This refers to the temperature difference between the previous auxiliary equipment and the current auxiliary equipment.

[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 Using formula (2), the parameters P corresponding to the second PID control are obtained respectively. z I z D z ; Set parameter P z I z D z The sum of these values ​​determines the main adjustment angle ΔV. z And adjust the main opening ΔV z The sum of the previous main valve opening and the current 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] Where Kpz, Kiz, and Kdz are coefficients, and E n E represents the current primary temperature difference. n-1 This is the previous primary temperature difference.

[0167] In some embodiments, it also includes:

[0168] The reset determination module determines the initial main valve opening and initial auxiliary valve opening that match the current compressor operating frequency and the current outdoor temperature, given that either the current compressor operating frequency or the current outdoor temperature changes. It also resets the first PID control and the second PID control, and resets the initial auxiliary temperature difference and the initial main temperature difference.

[0169] As can be seen, in this embodiment, the air conditioner is equipped with two throttling devices. When the air conditioner starts running, after determining the main and auxiliary throttling devices, the air conditioner control device can perform PID control on both devices. Furthermore, based on the PID control parameters corresponding to the auxiliary throttling devices, the main throttling device can be subjected to PID control, thus employing nested PID control. This effectively improves the stabilization speed of the outdoor unit, allowing the gas replenishment and enthalpy enhancement system equipped with dual throttling devices to reach stability more quickly. Moreover, multiple PID controls can be performed on the auxiliary throttling devices before PID control of the main throttling device, further accelerating the stabilization process of the gas replenishment and enthalpy enhancement system and improving the accuracy of air conditioner control.

[0170] Combination Figure 6 This disclosure provides an apparatus 600 for air conditioning control, comprising:

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

[0172] Furthermore, the logic instructions in the aforementioned memory 1001 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

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

[0174] The memory 1001 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 1001 may include high-speed random access memory and may also include non-volatile memory.

[0175] This disclosure provides an air conditioning control device, including: 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 This disclosure provides an air conditioner 700, including an air conditioner body and the aforementioned air conditioner control device 500 (600). The air conditioner control device 500 (600) is mounted on the air conditioner body. The mounting relationship described herein is not limited to placement inside the product, but also includes mounting connections with other components of the product, including but not limited to physical connections, electrical connections, or signal transmission connections. Those skilled in the art will understand that the air conditioner control device 500 (600) can be adapted to feasible air conditioner bodies to achieve other feasible embodiments.

[0177] This disclosure provides a storage medium storing program instructions that, when executed, perform the method for air conditioning control as described above.

[0178] This disclosure provides a computer program product, which includes a computer program stored on a storage medium. The computer program includes program instructions, which, when executed by a computer, cause the computer to perform the above-described air conditioning control method.

[0179] The aforementioned storage medium can be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0180] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.

[0181] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or replace parts and features of other embodiments. The scope of the embodiments of this disclosure includes the entire scope of the claims and all available equivalents of the claims. While the terms “first,” “second,” etc., may be used in this application to describe elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element may be called a second element without changing the meaning of the description, and similarly, a second element may be called a first element, provided that all occurrences of “first element” are consistently renamed and all occurrences of “second element” are consistently renamed. First and second elements are both elements, but may not be the same element. Moreover, the terminology used in this application is only for describing embodiments and is not intended to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Similarly, the term “and / or” as used herein means including one or more of the associated listed elements and all possible combinations thereof. Additionally, when used herein, the terms “comprise” and its variations “comprises” and / or “comprising” refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase “comprising an…” does not exclude the presence of additional identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0182] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

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

[0184] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling an air conditioner, characterized in that, The air conditioner includes an economical heat exchanger for replenishing gas and increasing enthalpy, and a first throttling device located between the economical heat exchanger and the outdoor heat exchanger, and a second throttling device located between the economical heat exchanger and the indoor heat exchanger. The method includes: Given that the current compressor operating frequency of the air conditioner is in operation and the current outdoor temperature remains unchanged, the current auxiliary outlet temperature of the pipe between the economic heat exchanger and the compressor, as well as the current exhaust temperature of the air conditioner, are obtained. 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 outlet temperature and the set auxiliary outlet temperature are also obtained. Based on the current auxiliary temperature difference, perform first PID control to obtain the current auxiliary valve opening corresponding to the auxiliary throttling device; and based on the current main temperature difference and the parameters corresponding to the first PID control, perform second PID control to obtain the current main valve opening corresponding to the main throttling device. Based on the current opening degree of the auxiliary valve and the current opening degree of the main valve, control the operation of the corresponding auxiliary throttling device and the main throttling device respectively; 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; It also includes: when the air conditioner is determined to be in operation, obtaining the opening degree of the first valve corresponding to the first throttling device and the opening degree of the second valve corresponding to the second throttling device, and obtaining the first exhaust temperature; when the opening degree of the first valve and the opening degree of the second valve are reduced separately, obtaining the second exhaust temperature and the third exhaust temperature after the air conditioner has been running for a set time; based on 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.

2. The method according to claim 1, characterized in that, The step of designating 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: The first temperature difference between the second exhaust temperature and the first exhaust temperature is obtained, wherein the second exhaust temperature is obtained when the first running time of the air conditioner reaches the first set value while the opening of the first valve is reduced by a set value and the opening of the second valve remains unchanged. The 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 running time of the air conditioner reaches the 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, the first throttling device is determined to be the main throttling device and the second throttling device is determined to be the auxiliary throttling device. When the first temperature difference is less than the second temperature difference, the second throttling device is determined to be the main throttling device, and the first throttling device is determined to be the auxiliary throttling device.

3. The method according to claim 1, characterized in that, The acquisition of the current auxiliary outlet temperature corresponding to the pipeline between the economic heat exchanger and the compressor, and the current exhaust temperature of the air conditioner includes: Get the current auxiliary outlet temperature of the pipeline between the economic heat exchanger and the compressor, and update the recorded number of times the temperature has been obtained. If the updated number of retrievals exceeds the set number, retrieve the current exhaust temperature of the air conditioner and reset the recorded number of retrievals to zero.

4. The method according to claim 3, 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; If the current auxiliary temperature difference is less than the set temperature difference, obtain the current exhaust temperature of the air conditioner.

5. The method according to claim 1, characterized in that, The current auxiliary valve opening corresponding to the auxiliary throttling device includes: Based on 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 ; Parameter P f I f D f The sum of these values ​​is used to determine the auxiliary adjustment opening ΔV. f And adjust the opening degree ΔV f The sum of the previous auxiliary valve opening degree and the current auxiliary valve opening degree is determined as the current auxiliary valve opening degree. 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 e is the coefficient n For the current auxiliary temperature difference, e n-1 This refers to the temperature difference between the previous auxiliary equipment and the current auxiliary equipment.

6. The method according to claim 5, characterized in that, The current main valve opening corresponding to the main throttling device includes: Based on the current primary temperature difference, the previous primary temperature difference, and the parameter P corresponding to the first PID control. f I f D f Using formula (2), the parameters P corresponding to the second PID control are obtained respectively. z I z D z ; Parameter P z I z D z The sum of these values ​​determines the main adjustment angle ΔV. z And adjust the main opening ΔV z The sum of the previous main valve opening and the current 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) Where Kpz, Kiz, and Kdz are coefficients, and E n E represents the current primary temperature difference. n-1 This is the previous primary temperature difference.

7. The method according to any one of claims 1-6, characterized in that, Also includes: Given a change in either the current compressor operating frequency or the current outdoor temperature of an air conditioner in operation, determine the initial main valve opening and the initial auxiliary valve opening that match the current compressor operating frequency and the current outdoor temperature. Reset the first PID control and the second PID control, and reset the initial auxiliary temperature difference and the initial main temperature difference.

8. An apparatus for controlling an air conditioner, the apparatus 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 described in any one of claims 1 to 7 when executing the program instructions.

9. An air conditioner, characterized in that, include: Air conditioner unit; The device for air conditioning control as described in claim 8 is installed on the air conditioning unit.

10. A storage medium storing program instructions, characterized in that, When the program instructions are executed, they perform the method for air conditioning control as described in any one of claims 1 to 7.

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