Air conditioning control method and related equipment

Abstract

The present application relates to the technical field of air-conditioning equipment, and relates to an air-conditioning control method, the method comprising: obtaining the internal temperature of a first heat exchanger, a second heat exchanger, and the internal temperature of the pipeline between a primary throttle and a flash evaporator, obtaining corresponding first temperature values, second temperature values, and third temperature values, respectively, and converting them into corresponding first pressure values, second pressure values, and third pressure values, calculating the three pressure values ​​and a preset deviation value, determining whether the opening angle of the primary throttle needs to be adjusted, and performing the adjustment. The present application also relates to an air-conditioning control device, air-conditioning equipment, and a computer-readable storage medium. The technical solution provided by the present application can accurately control the refrigerant flow through a primary throttle, ensure that the air supply volume and air supply pressure of the compressor are in a reasonable state, maximize the refrigeration effect, and protect the safe operation of the air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning equipment, and more specifically, to an air conditioning control method and related equipment. Background Art

[0002] When air conditioners operate in heating mode in winter at low outdoor temperatures, heating capacity typically decreases significantly. Therefore, auxiliary electric heating is often used to compensate for this shortfall. However, this approach has the significant disadvantage of high energy consumption. High-compression-ratio compressor technology, by increasing the ratio of the condensing pressure to the evaporating pressure in the air conditioning system, can moderately raise the condensing pressure, thereby increasing the condensing temperature and, consequently, the heating capacity. This alleviates this problem to some extent, but the increase in heating capacity is limited, making it difficult to resolve the heating capacity shortfall in most low-temperature heating applications.

[0003] The emergence of jet reheat technology has better solved the above problems, but the throttling of the refrigerant from the condenser outlet to the economizer is very critical. If the throttling is too large, it will lead to insufficient air supply and no obvious increase in heating capacity. If the throttling is insufficient, the compressor air supply may contain liquid refrigerant, which may cause damage to the compressor. Therefore, how to accurately control this throttling is particularly critical to the heating capacity and reliability of the jet reheat air conditioner.

[0004] Most of the existing jet reheat air conditioners use the method of controlling the compressor exhaust temperature to control the air supply volume. Because the correlation between exhaust temperature and air supply volume is not obvious, in order to avoid the air supply carrying liquid due to insufficient primary throttling, the primary throttling is usually conservatively increased, resulting in the heating capacity not being maximized. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present application is how to accurately control the refrigerant flow rate by the primary throttle so that the air supply from the flash evaporator to the compressor is in a reasonable state.

[0006] In order to solve the above technical problems, the present invention provides an air conditioning control method.

[0007] The air conditioner includes a first heat exchanger, a second heat exchanger, a primary throttle and a flash evaporator, and the method includes:

[0008] Obtaining the internal temperatures of the first heat exchanger, the second heat exchanger, and the internal temperature of the pipeline between the primary throttle and the flash evaporator, and obtaining corresponding first temperature values, second temperature values, and third temperature values ​​respectively;

[0009] According to preset temperature value and pressure value data, the first temperature value, the second temperature value, and the third temperature value are converted into corresponding first pressure value, second pressure value, and third pressure value;

[0010] obtaining an intermediate target pressure value according to the first pressure value and the second pressure value;

[0011] Obtaining a difference between the intermediate target pressure value and the third pressure value, and comparing the difference with a preset deviation value;

[0012] If the difference is greater than the preset deviation value, the throttle opening angle is increased once;

[0013] If the difference is less than the preset deviation value, reducing the throttle opening angle;

[0014] If the difference is equal to the preset deviation value, the throttle opening angle is maintained.

[0015] Furthermore, the intermediate target pressure value is obtained according to the first pressure value and the second pressure value using the following formula:

[0016] Pm0= ;

[0017] Wherein, Pm0 represents the intermediate target pressure value, Pd represents the first pressure value, and Pe represents the second pressure value.

[0018] Furthermore, before the step of converting the first temperature value, the second temperature value, and the third temperature value into corresponding first pressure values, the second pressure values, and the third pressure values ​​according to the preset temperature value and pressure value data, the method further includes:

[0019] Preset multiple groups of first standard temperature values, second standard temperature values, and third standard temperature values, detect the pressure values ​​inside the first heat exchanger and the second heat exchanger, and the pressure value in the pipeline between the primary throttle and the flash evaporator at each group of the first standard temperature values, the second standard temperature values, and the third standard temperature values, and obtain corresponding first standard pressure values, second standard pressure values, and third standard pressure values;

[0020] The preset temperature value and pressure value data are formed according to each group of the first standard pressure value, the second standard pressure value, and the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value.

[0021] Furthermore, the specific step of forming the preset temperature value and pressure value data according to each group of the first standard pressure value, the second standard pressure value, the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value includes:

[0022] Fitting the first standard temperature value and the first standard pressure value, the second standard temperature value and the second standard pressure value, and the third standard temperature value and the third standard pressure value at different temperatures into a first conversion curve, a second conversion curve, and a third conversion curve, respectively;

[0023] The first conversion curve, the second conversion curve, and the third conversion curve are used as the preset temperature value and pressure value data.

[0024] Furthermore, the range of the primary throttle opening angle is divided into a plurality of gears, and the primary throttle is opened to an intermediate gear when it is first opened; if the difference is greater than the preset deviation value, the primary throttle opening angle is increased; if the difference is less than the preset deviation value, the primary throttle opening angle is decreased; if the difference is equal to the preset deviation value, the primary throttle opening angle is maintained. The specific steps include:

[0025] Obtaining a preset maximum deviation value and a preset minimum deviation value;

[0026] The preset deviation value maximum value and the preset deviation value minimum value form a preset deviation value interval;

[0027] Divide the set deviation value interval into multiple groups of odd-numbered intervals, and use the median interval of the intervals as the reference interval;

[0028] Taking the interval corresponding to the difference as the current interval;

[0029] Adjusting the number of steps of the primary throttle method according to the distance between the current interval and the reference interval;

[0030] If the current interval is greater than the reference interval and the distance between the current interval and the reference interval is less than one interval, the primary throttle is opened by one gear;

[0031] If the current interval is larger than the reference interval and the distance between the current interval and the reference interval is not less than one interval, the primary throttle opens multiple gears;

[0032] If the current interval is equal to the reference interval, the primary throttle is maintained;

[0033] If the current interval is smaller than and close to the reference interval, and the distance between the current interval and the reference interval is smaller than one interval, the primary throttle is closed by one gear;

[0034] If the current interval is smaller than and far away from the reference interval, and the distance between the current interval and the reference interval is not less than one interval, the primary throttle closes multiple gears.

[0035] In order to solve the above technical problems, the embodiment of the present application further provides an air conditioning control device, comprising:

[0036] a detection module, configured to obtain the internal temperature of the first heat exchanger, the second heat exchanger, and the internal temperature of the pipeline between the primary throttle and the flash evaporator, and obtain corresponding first temperature values, second temperature values, and third temperature values ​​respectively;

[0037] a calculation module, configured to convert the first, second, and third temperature values ​​into corresponding first, second, and third pressure values ​​based on the preset temperature and pressure value data, calculate an intermediate target pressure value based on the first and second pressure values, and obtain a difference between the intermediate target pressure value and the second pressure value;

[0038] A judgment module is used to compare the difference with a preset deviation value; if the difference is greater than the preset deviation value, the throttle opening angle is increased; if the difference is less than the preset deviation value, the throttle opening angle is reduced; if the difference is equal to the preset deviation value, the throttle opening angle is maintained.

[0039] Furthermore, when the calculation module calculates the intermediate target pressure value according to the first pressure value and the second pressure value, it is specifically used to adopt the formula Pm0= An intermediate target pressure value is obtained, where Pm0 represents the intermediate target pressure value, Pd represents the first pressure value, and Pe represents the second pressure value.

[0040] Furthermore, an output module is included; when the calculation module forms the preset temperature value and pressure value data according to each group of the first standard pressure value, the second standard pressure value, the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value, the calculation module is specifically used to:

[0041] Fitting the first standard temperature value and the first standard pressure value, the second standard temperature value and the second standard pressure value, and the third standard temperature value and the third standard pressure value at different temperatures into a first conversion curve, a second conversion curve, and a third conversion curve, respectively;

[0042] The output module is used to output the first conversion curve, the second conversion curve, and the third conversion curve as the preset temperature value and pressure value data for storage.

[0043] In order to solve the above technical problems, an embodiment of the present application further provides a computer-readable storage medium, on which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor, the air-conditioning control method is implemented.

[0044] In order to solve the above technical problems, an embodiment of the present application further provides an air-conditioning device, comprising: a memory and a processor, wherein the memory stores computer-readable instructions, and the processor implements the air-conditioning control method when executing the computer-readable instructions.

[0045] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0046] By measuring the temperatures of the first heat exchanger, the second heat exchanger, and the refrigerant after passing through the primary throttle, the system detects first, second, and third temperature values, converts these temperatures into refrigerant pressure values, and then calculates whether to increase the refrigerant flow rate based on the current pressure value, adjusting the refrigerant pressure and ultimately increasing or decreasing the air conditioner's cooling effect. Precisely controlling the refrigerant flow rate through the primary throttle ensures that the compressor's air supply volume and pressure are at optimal levels, maximizing cooling efficiency and protecting the air conditioner's safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the solution of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0048] Figure 1 This is a flow chart of an air conditioning control method provided by an embodiment of the present invention.

[0049] Figure 2 It is a structural schematic diagram of the air conditioner of the present invention.

[0050] Figure 3 This is a basic structural block diagram of the air-conditioning equipment provided by an embodiment of the present invention.

[0051] Reference numerals:

[0052] A first heat exchanger 110, a second heat exchanger 120, a primary throttle 130, a flash evaporator 140, a secondary throttle 150, and a compressor 160;

[0053] Air conditioning device 6 , memory 61 , processor 62 , network interface 63 . DETAILED DESCRIPTION

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0055] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0057] See also Figure 1-Figure 2 , Figure 1 The flow chart of the air conditioning control method of the present application is shown. Figure 2 The schematic diagram of the air conditioner structure of the present invention is shown. The first heat exchanger 110 and the second heat exchanger 120 correspond to the indoor and outdoor exchangers in actual use. Depending on the cooling or heating mode, the first heat exchanger 110 and the second heat exchanger 120 can operate in opposite modes. The principles are the same and are not listed here one by one. Only the cooling mode is listed. The first heat exchanger 110 is used for indoor heat exchange. After absorbing heat from the indoor temperature in the first heat exchanger 110, the refrigerant enters the primary throttle 130. The primary throttle 130 adjusts the pressure of the refrigerant and separates the refrigerant into a partially gaseous state and a partially liquid state. The gaseous refrigerant enters the compressor 160, while the liquid refrigerant enters a phase change state through the secondary throttle 150 and enters the second heat exchanger 120. The outdoor second heat exchanger 120 dissipates the heat carried by the refrigerant. After the refrigerant changes to a gaseous state, it enters the compressor 160. During the overall operation of the air conditioner, the primary throttle 130 increases or decreases the number of opening steps to enhance or weaken the cooling effect of the air conditioner.

[0058] The present invention provides an air conditioner control method, wherein the air conditioner includes a first heat exchanger 110, a second heat exchanger 120, a primary throttle 130, and a flash evaporator 140. The method steps include:

[0059] S01: Obtaining the internal temperatures of the first heat exchanger 110, the second heat exchanger 120, and the internal temperature of the pipeline between the primary throttle 130 and the flash evaporator 140, and obtaining corresponding first temperature values, second temperature values, and third temperature values ​​respectively;

[0060] S02: converting the first temperature value, the second temperature value, and the third temperature value into corresponding first pressure values, the second pressure values, and the third pressure values ​​according to preset temperature value and pressure value data;

[0061] S03: Obtaining an intermediate target pressure value according to the first pressure value and the second pressure value;

[0062] S04: Obtaining a difference between the intermediate target pressure value and the third pressure value, and comparing the difference with a preset deviation value;

[0063] S05: If the difference is greater than the preset deviation value, increasing the throttle opening angle once;

[0064] If the difference is less than the preset deviation value, reducing the throttle opening angle;

[0065] If the difference is equal to the preset deviation value, the throttle opening angle is maintained.

[0066] The pressure of the refrigerant in the pipelines between the first heat exchanger 110, the second heat exchanger 120, the primary throttle 130 and the flash evaporator 140 in the air-conditioning system is different, and the heat value carried by the refrigerant at different pressures is also different. Therefore, the temperature of the pipelines between the first heat exchanger 110, the second heat exchanger 120, the primary throttle 130 and the flash evaporator 140 is also different. The pressure value corresponding to the preset temperature is obtained by detecting the pipeline temperature between the first heat exchanger 110, the second heat exchanger 120, the primary throttle 130 and the flash evaporator 140, that is, the first pressure value, the second pressure value and the third pressure value; it can be understood that the first pressure value corresponding to the first heat exchanger 110 is low pressure, and the second pressure value corresponding to the second heat exchanger 120 is high pressure.

[0067] An intermediate target pressure value is obtained by calculating the first pressure value (indoor heat exchanger) and the second pressure value (outdoor heat exchanger). The intermediate target pressure value is used to compare with the third pressure value to obtain a difference. The difference is compared with a preset deviation value. If the difference is greater than the preset deviation value, the heating amount of the air-conditioning system has not reached the optimal level, that is, the primary throttle 130 needs to increase the refrigerant flow rate, the opening angle of the primary throttle 130 is increased, and the cooling capacity of the air-conditioning system gradually increases.

[0068] Similarly, if the difference is less than the preset deviation value, the heating capacity of the air-conditioning system is also not optimal, that is, the primary throttle 130 reduces the refrigerant flow, the opening angle of the primary throttle 130 decreases, and the cooling capacity of the air-conditioning system gradually decreases.

[0069] Similarly, if the difference is within the preset deviation value range, the cooling capacity of the air-conditioning system has reached the optimal value, that is, the primary throttle 130 needs to maintain the refrigerant flow, the opening angle of the primary throttle 130 remains unchanged, and the cooling capacity of the air-conditioning system is maintained at the optimal value.

[0070] It is worth noting that in the embodiment of the present application, the preset deviation value is an interval value. If the difference value falls within the preset deviation value interval, the difference value is deemed equal to the preset deviation value. It is understood that the larger the preset deviation value interval, the greater the refrigerant pressure corresponding to the temperature difference between the first heat exchanger 110 and the second heat exchanger 120 (the difference between the first pressure value and the second pressure value) is required to adjust the flow rate of the first throttle valve. Users can adjust the preset deviation value range according to actual needs. The smaller the preset deviation value interval, the higher the refrigerant flow control accuracy of the air conditioning system can be.

[0071] By measuring the temperature of the first heat exchanger 110, the second heat exchanger 120, and the refrigerant after passing through the primary throttle 130, the system detects first, second, and third temperature values, converts these temperatures into refrigerant pressure values, and calculates whether to increase the refrigerant flow rate based on the current pressure value, adjusting the refrigerant pressure and ultimately increasing or decreasing the air conditioner's cooling effect. Precisely controlling the refrigerant flow rate through the primary throttle 130 ensures that the compressor's air supply volume and pressure are at optimal levels, maximizing cooling efficiency and protecting the air conditioner's safe operation.

[0072] In the embodiment of the present application, the intermediate target pressure value is obtained according to the first pressure value and the second pressure value using the following formula:

[0073] Pm0= ;

[0074] Wherein, Pm0 represents the intermediate target pressure value, Pd represents the first pressure value, and Pe represents the second pressure value.

[0075] The root of the value obtained by multiplying the first pressure value and the second pressure value is then taken to obtain an intermediate target pressure value. When the first pressure value or the second pressure value is an extreme value (one of the values ​​is obviously too large or too small), the intermediate target pressure value obtained is less affected, and the numerical difference between the intermediate target pressure value and the third pressure value is relatively small. By taking the difference between the intermediate target pressure value and the third pressure value, a more accurate difference can be obtained.

[0076] In other embodiments of the present application, other formulas may be used to calculate the intermediate target pressure value. The intermediate target pressure value may be calculated by substituting the first pressure value and the second pressure value into the arithmetic mean formula, or by substituting the first pressure value and the second pressure value into the harmonic mean formula.

[0077] In an embodiment of the present application, before the step of converting the first temperature value, the second temperature value, and the third temperature value into corresponding first pressure values, the second pressure value, and the third pressure values ​​according to the preset temperature value and pressure value data, the method further includes:

[0078] Preset multiple groups of first standard temperature values, second standard temperature values, and third standard temperature values, detect the pressure values ​​inside the first heat exchanger 110 and the second heat exchanger 120, and the pressure value in the pipeline between the primary throttle 130 and the flash evaporator 140 at each group of the first standard temperature values, the second standard temperature values, and the third standard temperature values, and obtain corresponding first standard pressure values, second standard pressure values, and third standard pressure values;

[0079] The preset temperature value and pressure value data are formed according to each group of the first standard pressure value, the second standard pressure value, and the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value.

[0080] The temperature value and pressure value data include the first standard temperature value, the second standard temperature value, and the third standard temperature value under the same temperature condition and under different temperature conditions, corresponding to the first standard temperature value, the second standard temperature value, and the third standard temperature value.

[0081] Specifically, under the same temperature conditions, for example, multiple groups of identical first standard temperature values ​​are detected for the refrigerant in the first heat exchanger 110. At this time, the multiple groups of pressure values ​​detected at the corresponding positions may not be exactly the same. The multiple groups of not exactly the same pressure values ​​are averaged to obtain the first standard pressure value; the same applies to the second standard temperature value and the third standard temperature value.

[0082] Specifically, under different temperature conditions, for example, multiple sets of different first standard temperature values ​​of the refrigerant are detected in the first heat exchanger 110 , and multiple sets of pressure values ​​at corresponding positions are detected, and the multiple sets of pressure values ​​are output as multiple sets of first standard pressure values.

[0083] Furthermore, the specific step of forming the preset temperature value and pressure value data according to each group of the first standard pressure value, the second standard pressure value, the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value includes:

[0084] Fitting the first standard temperature value and the first standard pressure value, the second standard temperature value and the second standard pressure value, and the third standard temperature value and the third standard pressure value at different temperatures into a first conversion curve, a second conversion curve, and a third conversion curve, respectively;

[0085] The first conversion curve, the second conversion curve, and the third conversion curve are used as the preset temperature value and pressure value data.

[0086] In the process of forming temperature and pressure value data, it is necessary to record the corresponding pressure of the refrigerant at different temperatures. The refrigerant temperature is detected through multiple stages and fitted into a first conversion curve, a second conversion curve, and a third conversion curve. For temperature values ​​that are not actually recorded during the experiment, the corresponding pressure values ​​can also be obtained through the first conversion curve, the second conversion curve, and the third conversion curve.

[0087] In detail, the temperature range of the refrigerant inside the first heat exchanger 110 is divided into ten groups of different temperatures, and the pressures are detected for the ten groups of different temperatures. Therefore, ten groups of first standard pressure values ​​corresponding to the ten groups of first standard temperature values ​​can be obtained, and the ten groups of first standard pressure values ​​corresponding to the ten groups of first standard temperature values ​​are fitted into a first conversion curve. When actually used, the first temperature sensor detects that the first temperature value of the first heat exchanger 110 is between two groups of first standard temperature values ​​among the ten groups of first standard temperature values, and the corresponding first pressure value is directly obtained according to the first conversion curve.

[0088] By fitting the first standard temperature value and the first standard pressure value, the second standard temperature value and the second standard pressure value, and the third standard temperature value and the third standard pressure value at different temperatures into the first conversion curve, the second conversion curve, and the third conversion curve respectively, in the process of converting the first temperature value, the second temperature value, and the third temperature value into the corresponding pressure value, there is no need to wait until the first temperature value, the second temperature value, and the third temperature value are the same as the first standard temperature value, the second temperature value, and the third temperature value of the experiment before conversion, thereby improving the efficiency of the first throttle 130 in adjusting the refrigerant flow.

[0089] In the embodiment of the present application, the range of the opening angle of the primary throttle 130 is divided into multiple gears. The primary throttle 130 is opened to the middle gear when it is opened for the first time. If the difference is greater than the preset deviation value, the opening angle of the primary throttle 130 is increased; if the difference is less than the preset deviation value, the opening angle of the primary throttle 130 is reduced; if the difference is equal to the preset deviation value, the opening angle of the primary throttle 130 is maintained. The specific steps include:

[0090] Obtaining a preset maximum deviation value and a preset minimum deviation value;

[0091] The preset deviation value maximum value and the preset deviation value minimum value form a preset deviation value interval;

[0092] Divide the preset deviation value interval into multiple groups of odd-numbered intervals, and use the median interval of the intervals as the reference interval;

[0093] Taking the interval corresponding to the difference as the current interval;

[0094] Adjusting the number of steps of the primary throttle method according to the distance between the current interval and the reference interval;

[0095] If the current interval is greater than the reference interval and the distance between the current interval and the reference interval is less than one interval, the primary throttle is opened by one gear;

[0096] If the current interval is greater than the reference interval and the distance between the current interval and the reference interval is not less than one interval, the primary throttle 130 opens multiple gears;

[0097] If the current interval is equal to the reference interval, the primary throttle 130 is maintained;

[0098] If the current interval is smaller than and close to the reference interval, and the distance between the current interval and the reference interval is smaller than one interval, the primary throttle 130 is closed by one gear;

[0099] If the current interval is smaller than and farther away from the reference interval, and the distance between the current interval and the reference interval is not less than one interval, the primary throttle 130 closes a plurality of gears.

[0100] The range of the opening angle of the primary throttle 130 is divided into multiple gears and corresponds to the preset deviation value. The preset deviation value has multiple intervals. By judging the interval position corresponding to the difference, the opening or closing steps of the primary throttle 130 are adjusted to adjust the refrigerant flow rate. If the current interval where the difference is located is far different from the reference interval position, it is determined that the adjustment of the refrigerant flow rate needs to be increased, and the opening steps of the primary throttle 130 need to be increased, that is, the primary throttle 130 opens or closes multiple gears.

[0101] By dividing the preset deviation value interval into multiple odd-numbered intervals, comparing the interval where the difference value is located with the position of the middle interval, and then adjusting the primary throttle 130 to open / close one or more gear positions, the primary throttle 130 can more efficiently adjust the refrigerant flow rate.

[0102] This embodiment provides an air-conditioning control device, including: a detection module, used to obtain the internal temperature of the first heat exchanger 110, the second heat exchanger 120, and the internal temperature of the pipeline between the primary throttle 130 and the flash evaporator 140, and obtain corresponding first temperature values, second temperature values, and third temperature values ​​respectively; a calculation module, used to convert the first temperature value, the second temperature value, and the third temperature value into corresponding first pressure values, second pressure values, and third pressure values ​​according to preset temperature and pressure value data, calculate an intermediate target pressure value according to the first pressure value and the second pressure value, and obtain the difference between the intermediate target value and the second pressure value; a judgment module, used to compare the difference with a preset deviation value; if the difference is greater than the preset deviation value, increase the opening angle of the primary throttle 130; if the difference is less than the preset deviation value, reduce the opening angle of the primary throttle 130; if the difference is equal to the preset deviation value, maintain the opening angle of the primary throttle 130.

[0103] In the embodiment of the present application, when the calculation module calculates the intermediate target pressure value according to the first pressure value and the second pressure value, it is specifically used to use the formula Pm0= An intermediate target pressure value is obtained, where Pm0 represents the intermediate target pressure value, Pd represents the first pressure value, and Pe represents the second pressure value.

[0104] In an embodiment of the present application, the air conditioning control device further includes a storage module storing a plurality of preset groups of first standard temperature values, second standard temperature values, and third standard temperature values.

[0105] Before the calculation module converts the first temperature value, the second temperature value, and the third temperature value into the corresponding first pressure value, the second pressure value, and the third pressure value according to the preset temperature value and pressure value data,

[0106] The detection module is further configured to detect the pressure values ​​inside the first heat exchanger and the second heat exchanger at each set of the first standard temperature value, the second standard temperature value, and the third standard temperature value, as well as the pressure value in the pipeline between the primary throttle and the flash evaporator, to obtain corresponding first standard pressure values, second standard pressure values, and third standard pressure values;

[0107] The calculation module is further configured to form the preset temperature value and pressure value data according to each group of the first standard pressure value, the second standard pressure value, the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, the third standard temperature value.

[0108] In the embodiment of the present application, an output module is further included. When the calculation module forms the preset temperature value and pressure value data according to each group of the first standard pressure value, the second standard pressure value, the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value, the calculation module is specifically configured to:

[0109] Fitting the first standard temperature value and the first standard pressure value, the second standard temperature value and the second standard pressure value, and the third standard temperature value and the third standard pressure value at different temperatures into a first conversion curve, a second conversion curve, and a third conversion curve, respectively;

[0110] The output module is used to output the first conversion curve, the second conversion curve, and the third conversion curve as the preset temperature value and pressure value data for storage.

[0111] In an embodiment of the present application, the judgment module compares the difference with a preset deviation value; if the difference is greater than the preset deviation value, the primary throttle opening angle is increased; if the difference is less than the preset deviation value, the primary throttle opening angle is reduced; if the difference is equal to the preset deviation value, the primary throttle opening angle is maintained, specifically for:

[0112] The calculation module obtains a preset maximum deviation value and a preset minimum deviation value; the calculation module forms a preset deviation value interval with the preset maximum deviation value and the preset minimum deviation value; the preset deviation value interval is divided into a plurality of odd-numbered intervals, and the median interval of the interval is used as a reference interval; and the interval corresponding to the difference is used as the current interval; the number of steps of the primary throttle method is adjusted according to the distance between the current interval and the reference interval; if it is determined that the current interval is greater than the reference interval and the distance from the reference interval is less than one interval, the output module controls the primary throttle 130 to open one gear; if it is determined that the current interval is greater than the reference interval and the distance from the reference interval is not less than one interval, the output module controls the primary throttle 130 to open multiple gears;

[0113] If it is determined that the current interval is equal to the reference interval, the primary throttle 130 is controlled to remain constant through the output module;

[0114] If it is determined that the current interval is smaller than and close to the reference interval, and the distance between the current interval and the reference interval is greater than one interval, the primary throttle 130 is controlled by the output module to close one gear;

[0115] If it is determined that the current interval is smaller than and far away from the reference interval, and the distance from the reference interval is not less than one interval, the primary throttle 130 is controlled by the output module to close multiple gears.

[0116] When each module in the above-mentioned air-conditioning control device performs functional operations, the specific content of the operations can refer to the relevant technical content in the above-mentioned method embodiment, and has corresponding technical effects, which will not be expanded here.

[0117] Example 3

[0118] This embodiment provides a computer-readable storage medium having computer-readable instructions stored thereon, which implement the air-conditioning control method when executed by a processor.

[0119] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of this application.

[0120] Example 4

[0121] The present application also provides an air conditioning device. Figure 3 , Figure 3 This is the basic structural block diagram of the air-conditioning equipment in this embodiment.

[0122] The air conditioning device 6 includes a memory 61, a processor 62, and a network interface 63, which are interconnected via a system bus. It should be noted that the figure only shows the air conditioning device 6 having components 61-63, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead. It should be understood by those skilled in the art that the air conditioning device herein is a device that can automatically perform numerical calculations and / or information processing according to pre-set or stored instructions, and its hardware includes but is not limited to a microprocessor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a digital signal processor (DSP), an embedded device, etc.

[0123] The air conditioning device 6 can be a computing device such as a desktop computer, a notebook, a palmtop computer, a cloud server, etc. The air conditioning device can interact with the user through a keyboard, a mouse, a remote control, a touchpad, or a voice control device.

[0124] The memory 61 includes at least one type of readable storage medium, including flash memory, a hard disk, a multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic storage, a magnetic disk, an optical disk, etc. In some embodiments, the memory 61 may be an internal storage unit of the air conditioner 6, such as the hard disk or internal memory of the air conditioner 6. In other embodiments, the memory 61 may also be an external storage device of the air conditioner 6, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash memory card, etc. Of course, the memory 61 may also include both the internal storage unit of the air conditioner 6 and its external storage device. In this embodiment, the memory 61 is generally used to store the operating system and various application software installed in the air conditioner 6, such as the program code of the air conditioning control method. In addition, the memory 61 can also be used to temporarily store various types of data that have been output or are to be output.

[0125] In some embodiments, the processor 62 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor 62 is typically used to control the overall operation of the air conditioning device 6. In this embodiment, the processor 62 is used to execute program code stored in the memory 61 or process data, such as executing the program code for the air conditioning control method.

[0126] The network interface 63 may include a wireless network interface or a wired network interface. The network interface 63 is generally used to establish a communication connection between the air conditioning device 6 and other electronic devices.

[0127] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. A method for controlling an air conditioner, wherein the air conditioner comprises a first heat exchanger, a second heat exchanger, a primary throttle and a flash evaporator, wherein: The method steps include: Obtaining the internal temperatures of the first heat exchanger, the second heat exchanger, and the internal temperature of the pipeline between the primary throttle and the flash evaporator, and obtaining corresponding first temperature values, second temperature values, and third temperature values ​​respectively; According to preset temperature value and pressure value data, the first temperature value, the second temperature value, and the third temperature value are converted into corresponding first pressure value, second pressure value, and third pressure value; obtaining an intermediate target pressure value according to the first pressure value and the second pressure value; Obtaining a difference between the intermediate target pressure value and the third pressure value, and comparing the difference with a preset deviation value; If the difference is greater than the preset deviation value, the primary throttle opening angle is increased; if the difference is less than the preset deviation value, the primary throttle opening angle is decreased; if the difference is equal to the preset deviation value, the primary throttle opening angle is maintained; The intermediate target pressure value is obtained according to the first pressure value and the second pressure value using the following formula: Pm0= ; Wherein, Pm0 represents the intermediate target pressure value, Pd represents the first pressure value, and Pe represents the second pressure value.

2. The air conditioning control method according to claim 1, characterized in that: Before the step of converting the first temperature value, the second temperature value, and the third temperature value into corresponding first pressure values, the second pressure value, and the third pressure values ​​according to the preset temperature value and pressure value data, the method further includes: Preset multiple groups of first standard temperature values, second standard temperature values, and third standard temperature values, detect the pressure values ​​inside the first heat exchanger and the second heat exchanger, and the pressure value in the pipeline between the primary throttle and the flash evaporator at each group of the first standard temperature values, the second standard temperature values, and the third standard temperature values, and obtain corresponding first standard pressure values, second standard pressure values, and third standard pressure values; The preset temperature value and pressure value data are formed according to each group of the first standard pressure value, the second standard pressure value, and the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value.

3. The air conditioning control method according to claim 2, characterized in that: The specific step of forming the preset temperature value and pressure value data according to each group of the first standard pressure value, the second standard pressure value, the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value includes: Fitting the first standard temperature value and the first standard pressure value, the second standard temperature value and the second standard pressure value, and the third standard temperature value and the third standard pressure value at different temperatures into a first conversion curve, a second conversion curve, and a third conversion curve, respectively; The first conversion curve, the second conversion curve, and the third conversion curve are used as the preset temperature value and pressure value data.

4. The air conditioning control method according to claim 1, wherein: The range of the primary throttle opening angle is divided into a plurality of gears, and the primary throttle is opened to an intermediate gear when it is first opened; if the difference is greater than the preset deviation value, the primary throttle opening angle is increased; if the difference is less than the preset deviation value, the primary throttle opening angle is decreased; If the difference is equal to the preset deviation value, the specific steps of maintaining the primary throttle opening angle include: Obtaining a preset maximum deviation value and a preset minimum deviation value; The preset deviation value maximum value and the preset deviation value minimum value form a preset deviation value interval; Divide the set deviation value interval into multiple groups of odd-numbered intervals, and use the median interval of the intervals as the reference interval; Taking the interval corresponding to the difference as the current interval; Adjusting the number of throttle steps according to the distance between the current interval and the reference interval; If the current interval is greater than the reference interval and the distance between the current interval and the reference interval is less than one interval, the primary throttle is opened by one gear; If the current interval is larger than the reference interval and the distance between the current interval and the reference interval is not less than one interval, the primary throttle opens multiple gears; If the current interval is equal to the reference interval, the primary throttle is maintained; If the current interval is smaller than and close to the reference interval, and the distance between the current interval and the reference interval is smaller than one interval, the primary throttle is closed by one gear; If the current interval is smaller than and far away from the reference interval, and the distance between the current interval and the reference interval is not less than one interval, the primary throttle closes multiple gears.

5. An air conditioning control device, characterized in that: include: a detection module, configured to obtain the internal temperature of the first heat exchanger, the second heat exchanger, and the internal temperature of the pipeline between the primary throttle and the flash evaporator, and obtain corresponding first temperature values, second temperature values, and third temperature values ​​respectively; a calculation module, configured to convert the first temperature value, the second temperature value, and the third temperature value into corresponding first pressure values, the second pressure value, and the third pressure value according to preset temperature and pressure value data, calculate an intermediate target pressure value according to the first pressure value and the second pressure value, and obtain a difference between the intermediate target value and the second pressure value; A judgment module, used for comparing the difference value with a preset deviation value; If the difference is greater than the preset deviation value, the primary throttle opening angle is increased; if the difference is less than the preset deviation value, the primary throttle opening angle is decreased; if the difference is equal to the preset deviation value, the primary throttle opening angle is maintained; When the calculation module calculates the intermediate target pressure value according to the first pressure value and the second pressure value, it is specifically used to use the formula Pm0= The intermediate target pressure value is obtained, where Pm0 represents the intermediate target pressure value, Pd represents the first pressure value, and Pe represents the second pressure value.

6. The air conditioning control device according to claim 5, characterized in that: Also includes output modules; The air conditioning control device further includes a storage module storing a plurality of preset groups of first standard temperature values, second standard temperature values, and third standard temperature values, and the detection module is further configured to detect the pressure values ​​inside the first heat exchanger and the second heat exchanger at each group of the first standard temperature values, the second standard temperature values, and the third standard temperature values, as well as the pressure value in the pipeline between the primary throttle and the flash evaporator, to obtain the corresponding first standard pressure value, the second standard pressure value, and the third standard pressure value; When the calculation module forms the preset temperature value and pressure value data according to each group of the first standard pressure value, the second standard pressure value, the third standard pressure value and the corresponding first standard temperature value, the second standard temperature value, and the third standard temperature value, the calculation module is specifically used to: Fitting the first standard temperature value and the first standard pressure value, the second standard temperature value and the second standard pressure value, and the third standard temperature value and the third standard pressure value at different temperatures into a first conversion curve, a second conversion curve, and a third conversion curve, respectively; The output module is used to output the first conversion curve, the second conversion curve, and the third conversion curve as the preset temperature value and pressure value data for storage.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-readable instructions, and when the computer-readable instructions are executed by a processor, the air-conditioning control method according to any one of claims 1 to 4 is implemented.

8. An air conditioning device, characterized in that: The method comprises a memory and a processor, wherein the memory stores computer-readable instructions, and the processor implements the air-conditioning control method according to any one of claims 1 to 4 when executing the computer-readable instructions.

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