Control method and air conditioning system

Abstract

The application discloses a control method and an air conditioning system. The control method is used for the air conditioning system, and the control method comprises the following steps: when the air conditioning system operates in a refrigeration or dehumidification mode, an actual dew point temperature of an indoor environment is acquired; an actual air outlet temperature of an indoor air conditioner is acquired; when the actual dew point temperature is greater than or equal to a first threshold value and lasts for a first predetermined time length, a target low-pressure pressure of an outdoor air conditioner is calculated; a current low-pressure pressure of the outdoor air conditioner is acquired; and based on a comparison result of the target low-pressure pressure and the current low-pressure pressure, a rotating speed of a compressor of the outdoor air conditioner is controlled to adjust the air outlet temperature. While reducing the risk of condensation of a fairing plate of the air conditioning system, the control method of the application controls the air outlet temperature based on the comparison result of the target pressure and the current low-pressure pressure, does not change the working mode of the air conditioning system, thereby ensuring the continuity of the working mode of the air conditioning system, and further reducing the fluctuation of the environmental temperature and humidity.

Description

Technical Field

[0001] This invention relates to the field of air conditioning system technology, and more particularly to a control method and an air conditioning system. Background Technology

[0002] Perforated plate air supply is one type of air supply method in air conditioning systems. The principle of perforated plate air supply is to direct the cooled or heated airflow from the air conditioning system into a rectifier plate on the air outlet side of the indoor heat exchanger for rectification, resulting in lower airflow velocity, lower noise, and more uniform distribution. However, in cooling or dehumidifying operation modes, the rectifier plate has a large contact area with the air, and the airflow velocity is low. If the actual dew point temperature of the indoor environment is high, the risk of condensation on the rectifier plate is high. In related technologies, anti-condensation control is achieved by adjusting the operating mode of the air conditioning system, which leads to discontinuous operation of the air conditioning system, resulting in large fluctuations in ambient temperature and humidity. Summary of the Invention

[0003] This invention provides a control method, an air conditioning system, a control device, and a storage medium.

[0004] The control method of this invention is used in an air conditioning system, the control method comprising:

[0005] When the air conditioning system is operating in cooling or dehumidification mode, the actual dew point temperature of the indoor environment is obtained;

[0006] The actual air outlet temperature of the indoor air conditioner is obtained. The indoor air conditioner includes an indoor heat exchanger and a rectifier plate located on the air outlet side of the indoor heat exchanger.

[0007] When the actual dew point temperature is greater than or equal to the first threshold and continues for a first predetermined duration, the target low pressure of the outdoor air conditioner is calculated.

[0008] Obtain the current low-pressure reading of the outdoor air conditioner;

[0009] Based on the comparison between the target low pressure and the current low pressure, the compressor speed of the outdoor air conditioner is controlled to adjust the outlet air temperature.

[0010] In the control method of this invention, the target low-pressure of the outdoor air conditioner is calculated by acquiring the actual dew point temperature of the indoor environment. Based on the comparison between the target pressure and the current low-pressure, the compressor speed of the outdoor air conditioner is controlled, thereby adjusting the outlet air temperature. This method can control the outlet air temperature in real time according to the actual dew point temperature of the indoor environment, thereby adjusting the outlet air temperature to a suitable range before condensation occurs on the rectifier plate. Simultaneously, controlling the outlet air temperature based on the comparison between the target pressure and the current low-pressure does not change the operating mode of the air conditioning system. The air conditioning system can always be in cooling or dehumidifying mode, thus ensuring the continuity of the air conditioning system's operating mode and reducing fluctuations in ambient temperature and humidity.

[0011] In some implementations, when the actual dew point temperature is greater than or equal to a first threshold and remains so for a first predetermined duration, the target low-pressure of the outdoor air conditioner is calculated, including:

[0012] Calculate the difference between the actual dew point temperature and the actual outlet air temperature;

[0013] The original target low-pressure pressure is corrected based on the difference to obtain the target low-pressure pressure.

[0014] In some embodiments, the step of correcting the original target low-pressure pressure based on the difference to obtain the target low-pressure pressure includes:

[0015] Based on the difference, determine the number of corrections;

[0016] The original target low-pressure pressure is corrected in a gradient manner based on the number of corrections.

[0017] In some embodiments, the control method includes:

[0018] The number of times the original target low-pressure pressure is corrected in the same direction is less than a predetermined number.

[0019] In some implementations, when the difference is greater than a second threshold and persists for a second predetermined duration, the original target low pressure is increased.

[0020] In some implementations, the larger the difference, the smaller the second predetermined duration.

[0021] In some embodiments, the control method includes:

[0022] When the difference is less than or equal to the third threshold and lasts for a third predetermined duration, the original target low pressure is reduced, wherein the second threshold is greater than the third threshold and the second predetermined duration is less than the third predetermined duration.

[0023] In some embodiments, the control method includes:

[0024] When the difference is greater than the third threshold and less than or equal to the second threshold, the original target low pressure is corrected again after a certain number of corrections.

[0025] In some implementations, correcting the original target low-pressure pressure based on the difference to obtain the target low-pressure pressure includes:

[0026] Obtain the outdoor ambient temperature;

[0027] The original target low pressure is determined based on the outdoor ambient temperature; the higher the outdoor ambient temperature, the higher the original target low pressure.

[0028] In some implementations, controlling the compressor speed to adjust the outlet air temperature based on a comparison between the target low-pressure and the current low-pressure includes:

[0029] When the current low pressure is greater than the target low pressure, the compressor speed of the outdoor air conditioner is increased to reduce the outlet air temperature;

[0030] When the current low pressure is less than the target low pressure, the compressor speed of the outdoor air conditioner is reduced to increase the outlet air temperature.

[0031] The air conditioning system of the present invention includes an indoor air conditioner, an outdoor air conditioner, a memory, and a controller. The indoor air conditioner includes an indoor heat exchanger and a rectifier plate located on the air outlet side of the indoor heat exchanger. The memory is used to store a computer program, and the controller is used to execute the computer program to implement the control method described in any of the above embodiments.

[0032] The control device in this embodiment of the invention includes:

[0033] The acquisition module is used to acquire the actual dew point temperature of the indoor environment when the air conditioning system is operating in cooling or dehumidification mode; and to acquire the actual air outlet temperature of the indoor air conditioner, the indoor air conditioner including an indoor heat exchanger and a rectifier plate located on the air outlet side of the indoor heat exchanger; and to acquire the current low pressure of the outdoor air conditioner.

[0034] The calculation module is used to calculate the target low pressure of the outdoor air conditioner when the actual dew point temperature is greater than or equal to a first threshold and continues for a first predetermined duration.

[0035] The control module is used to control the compressor speed to adjust the outlet air temperature based on the comparison result between the target low pressure and the current low pressure.

[0036] The non-volatile computer-readable storage medium of computer-executable instructions according to embodiments of the present invention is characterized in that, when the computer-executable instructions are executed by one or more processors, the processors perform the control method described in any of the above embodiments.

[0037] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 This is a flowchart illustrating a control method according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of an air conditioning system according to an embodiment of the present invention;

[0041] Figure 3 This is a simplified structural diagram of an air conditioning system according to an embodiment of the present invention;

[0042] Figure 4 This is a simplified schematic diagram of the control device according to one embodiment of the present invention;

[0043] Figure 5 This is a flowchart illustrating a control method according to an embodiment of the present invention;

[0044] Figure 6 This is a flowchart illustrating a control method according to an embodiment of the present invention;

[0045] Figure 7 This is a flowchart illustrating a control method according to an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] Air conditioning system 100; indoor air conditioner 10; outdoor air conditioner 20; memory 30; controller 40; indoor heat exchanger 11; rectifier plate 12; control device 200; acquisition module 201; calculation module 202; control module 203; confirmation module 204; ambient temperature and humidity sensor 50; supply air temperature sensor 60; compressor 70; low pressure sensor 80; outdoor ambient temperature sensor 90. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0053] Please see Figure 1 and Figure 2 The control method of this invention is used in an air conditioning system 100, and the control method includes:

[0054] S10: When the air conditioning system 100 is operating in cooling or dehumidification mode, the actual dew point temperature of the indoor environment is obtained.

[0055] S20, obtain the actual air outlet temperature of the indoor air conditioner 10. The indoor air conditioner 10 includes an indoor heat exchanger 11 and a rectifier plate 12 located on the air outlet side of the indoor heat exchanger 11.

[0056] S30, when the actual dew point temperature is greater than or equal to the first threshold and continues for a first predetermined duration, calculate the target low pressure of the outdoor air conditioner 20;

[0057] S40, obtain the current low pressure of the outdoor air conditioner 20;

[0058] S50, based on the comparison between the target low pressure and the current low pressure, controls the speed of the compressor 70 of the outdoor air conditioner 20 to adjust the outlet air temperature.

[0059] Steps S20 and S40 can be executed before step S10 or simultaneously with step S10.

[0060] Please see Figure 2 and Figure 3 The air conditioning system 100 of the present invention includes an indoor air conditioner 10, an outdoor air conditioner 20, a memory 30 and a controller 40. The indoor air conditioner 10 includes an indoor heat exchanger 11 and a rectifier plate 12 located on the air outlet side of the indoor heat exchanger 11. The memory 30 is used to store computer programs, and the controller 40 is used to execute the computer programs to implement the control method described in the above embodiments.

[0061] For example, the controller 40 is used to acquire the actual dew point temperature of the indoor environment when the air conditioning system 100 is operating in cooling or dehumidification mode; and to acquire the actual air outlet temperature of the indoor air conditioner 10; and to calculate the target low pressure of the outdoor air conditioner 20 when the actual dew point temperature is greater than or equal to a first threshold and continues for a first predetermined duration; and to acquire the current low pressure of the outdoor air conditioner 20; and to control the speed of the compressor 70 of the outdoor air conditioner 20 to adjust the air outlet temperature based on the comparison result between the target low pressure and the current low pressure.

[0062] Please see Figure 4 The control device 200 of this embodiment includes an acquisition module 201, a calculation module 202, and a control module 203. The acquisition module 201 is used to acquire the actual dew point temperature of the indoor environment when the air conditioning system 100 is operating in cooling or dehumidification mode; to acquire the actual air outlet temperature of the indoor air conditioner 10; and to acquire the current low-pressure of the outdoor air conditioner 20. The calculation module 202 is used to calculate the target low-pressure of the outdoor air conditioner 20 when the actual dew point temperature is greater than or equal to a first threshold and remains so for a first predetermined duration. The control module 203 is used to control the speed of the compressor 70 to adjust the air outlet temperature based on the comparison result between the target low-pressure and the current low-pressure.

[0063] In the control method of this invention, the target low-pressure of the outdoor air conditioner 20 is calculated by acquiring the actual dew point temperature of the indoor environment. Based on the comparison between the target pressure and the current low-pressure, the speed of the compressor 70 of the outdoor air conditioner 20 is controlled, thereby adjusting the outlet air temperature. This method can control the outlet air temperature in real time according to the actual dew point temperature of the indoor environment, thereby adjusting the outlet air temperature to a suitable range before condensation occurs on the rectifier plate 12. At the same time, by controlling the outlet air temperature based on the comparison between the target pressure and the current low-pressure, the operating mode of the air conditioning system 100 is not changed. The air conditioning system 100 can always be in cooling or dehumidifying mode, thereby ensuring the continuity of the operating mode of the air conditioning system 100 and reducing fluctuations in ambient temperature and humidity.

[0064] Specifically, in cooling or dehumidifying mode, the main task of the air conditioning system 100 is to regulate the temperature and humidity of the environment. In cooling or dehumidifying mode, the rectifier plate 12 has a larger contact area with the air and a lower airflow velocity, making it prone to condensation.

[0065] Therefore, special measures are needed to prevent condensation on the rectifier plate 12 during cooling or dehumidification modes to ensure that the air conditioning system 100 can operate stably and continuously. In other operating modes, such as ventilation or heating modes, the risk of condensation on the rectifier plate 12 is relatively low, so similar control measures are not required.

[0066] The actual dew point temperature can be detected by sensors or measuring devices to determine the actual dew point temperature of the surrounding air. The actual dew point temperature reflects the current humidity level of the environment. The sensor can be a dew point temperature sensor, an ambient temperature and humidity sensor 50, etc., and can be installed in an appropriate location within the air conditioning system 100. For example, the sensor is an ambient temperature and humidity sensor 50, which is installed inside the air conditioning system 100 or in an area with relatively dense air circulation.

[0067] The actual outlet air temperature refers to the temperature data of the airflow measured at the outlet side of the indoor air conditioner 10. The actual outlet air temperature can be used to evaluate the cooling or dehumidifying effect of the airflow released by the indoor air conditioner 10. The actual outlet air temperature can be measured by a supply air temperature sensor 60, which can be installed at an appropriate location on the indoor air conditioner 10. For example, the supply air temperature sensor 60 can be installed at the air outlet of the indoor air conditioner 10. Both the actual outlet air temperature and the actual dew point temperature can be measured in real time.

[0068] The indoor heat exchanger 11 is a component in the air conditioning system 100 responsible for exchanging heat between the refrigerant or heat transfer medium and the air. Its main function is to deliver cooled or heated air to the rectifier plate 12. The rectifier plate 12 is located on the air outlet side of the indoor heat exchanger 11 and is used to rectify the airflow entering the room, thereby reducing the airflow velocity, noise, and distribution. However, the rectifier plate 12 has a large contact area with the air and a low airflow velocity, which poses a risk of condensation on the rectifier plate 12 under high ambient humidity conditions. To reduce the risk of condensation, the difference between the actual dew point temperature and the actual outlet air temperature can be controlled. The actual outlet air temperature can be adjusted by the low-pressure setting of the outdoor air conditioning unit 20.

[0069] Before adjusting the low-pressure setting of the outdoor air conditioner 20, it is necessary to first confirm whether the actual dew point temperature is outside the range. If the actual dew point temperature exceeds the first threshold and remains outside the range for a first predetermined duration, the probability of condensation occurring on the rectifier plate 12 will increase significantly.

[0070] The first threshold can be any temperature value greater than 5℃, such as 5℃, 5.5℃, 6℃, 6.5℃, 7℃, etc.; the first predetermined duration can be set according to actual needs, such as 10min, 12min, 15min, 18min, 20min, etc.

[0071] Compressor 70 is a core component of the air conditioning system 100, responsible for circulating and compressing refrigerant to complete the cooling or dehumidification process. The target low-pressure, as one of the control parameters, affects the operating state and efficiency of compressor 70. The target low-pressure of the outdoor air conditioner 20 is the low-pressure that the outdoor air conditioner 20 needs to achieve, while the current low-pressure is the low-pressure at which the outdoor air conditioner 20 is currently operating. When the current low-pressure is greater than the target low-pressure, the compressor 70 speed increases, thereby reducing the current low-pressure to the target low-pressure; when the current low-pressure is less than the target low-pressure, the compressor 70 speed decreases, thereby increasing the current low-pressure to the target low-pressure.

[0072] It is understandable that increasing the compressor speed 70 will increase the refrigerant flow rate and compression efficiency in the refrigeration system, thereby leading to a decrease in low-pressure. This is because when the compressor speed 70 increases, the refrigerant flow rate increases, resulting in a larger refrigerant flow rate in the system. The refrigerant in the air conditioning system 100 absorbs more heat and evaporates quickly, thus causing a decrease in low-pressure.

[0073] When the compressor speed is higher (70 rpm), the refrigerant compression efficiency increases, and the heat transfer of the refrigerant in the evaporator and condenser also increases, thus lowering the outlet air temperature. Conversely, when the compressor speed is lower (70 rpm), the refrigerant compression efficiency decreases, and the outlet air temperature rises.

[0074] To meet the needs of cooling or dehumidification modes, the outlet air temperature may be lowered during the adjustment process. Since condensation is the process by which water molecules in the air liquefy upon cooling and coalesce into water droplets at condensation nuclei, this process takes time. Furthermore, the airflow velocity during perforated plate air supply is low, the outlet air temperature decreases slowly, air diffusion and mixing are good, the mixing process is short, and the temperature difference and wind speed decay quickly, resulting in uniform airflow distribution in the working area. This means that even if the outlet air temperature decreases, it will not lead to excessive temperature differences in the working area. Therefore, the probability of condensation occurring due to a decrease in outlet air temperature is low.

[0075] The current low-pressure value can be obtained by installing a corresponding sensor to monitor and measure the current low-pressure value of the outdoor air conditioner 20 in real time. For example, the current low-pressure value can be obtained by installing a low-pressure sensor 80 in the outdoor air conditioner 20, which can monitor and measure the low-pressure value in the refrigeration cycle in real time.

[0076] In addition, the current low pressure value of the outdoor air conditioner 20 can be stored in the control unit or data acquisition system of the air conditioning system 100, and a request can be sent to the control unit or data acquisition system to obtain the current low pressure of the outdoor air conditioner 20.

[0077] Please see Figure 5 In some embodiments, when the actual dew point temperature is greater than or equal to a first threshold and remains so for a first predetermined duration, the target low-pressure pressure of the outdoor air conditioner 20 is calculated (step S30), including:

[0078] S31, calculate the difference between the actual dew point temperature and the actual outlet air temperature;

[0079] S32, the original target low pressure is corrected based on the difference to obtain the target low pressure.

[0080] Please see Figure 3 In some embodiments, the controller 40 is used to calculate the difference between the actual dew point temperature and the actual outlet air temperature; and to correct the original target low pressure based on the difference to obtain the target low pressure.

[0081] Please see Figure 4 In some embodiments, the calculation module 202 is used to calculate the difference between the actual dew point temperature and the actual outlet air temperature; and to correct the original target low pressure based on the difference to obtain the target low pressure.

[0082] In this way, the actual dew point temperature and the actual outlet air temperature can be measured in real time. The target low pressure is obtained by correcting the original target low pressure through the difference between the actual dew point temperature and the actual outlet air temperature. The original target low pressure can be corrected multiple times to obtain an accurate target low pressure. In this way, the outlet air temperature can be adjusted to a suitable range before condensation occurs on the rectifier plate 12.

[0083] Specifically, the difference between the actual dew point temperature and the actual outlet air temperature is the difference between the actual dew point temperature and the actual outlet air temperature. This difference can be positive, zero, or negative. The correction process can be linear or non-linear. The difference between the actual dew point temperature and the actual outlet air temperature reflects the risk of condensation. For example, a positive difference indicates a lower risk of condensation, and the target low-pressure area should be increased; a negative difference indicates a higher risk of condensation, and the target low-pressure area should be decreased.

[0084] The initial target low-pressure can be a range value, which can reduce the adverse effects of internal pressure fluctuations in the air conditioning system. Similarly, the target low-pressure can also be a range value. The initial target low-pressure can be obtained based on the outdoor ambient temperature.

[0085] Please see Figure 6 In some implementations, the original target low-pressure pressure is corrected based on the difference to obtain the target low-pressure pressure (step S32), including:

[0086] S320, determine the number of corrections based on the difference;

[0087] S321 corrects the original target low-pressure pressure in a gradient manner based on the number of corrections.

[0088] Please see Figure 3 In some implementations, the controller 40 is used to determine the number of corrections based on the difference; and to correct the original target low-pressure pressure in a gradient manner based on the number of corrections.

[0089] Please see Figure 4 In some embodiments, the control device 200 further includes a confirmation module 204, which is used to determine the number of corrections based on the difference; and a calculation module 202 is used to correct the original target low pressure in a gradient manner based on the number of corrections.

[0090] Thus, the control logic for correcting the original target low-pressure pressure using a gradient approach is simple, thereby improving control efficiency.

[0091] Specifically, the number of corrections can be an integer value, such as 1, 2, 3, 4, 5, etc. The correction process can be performed according to the following formula:

[0092] Target low pressure = Original target low pressure + A * number of corrections;

[0093] Where A is a coefficient, the value of which can be determined according to actual needs, for example, A can be 0.5, 0.7, 1, 1.2, 1.5, etc.; the number of corrections is the number of times the original target low pressure is corrected. The number of corrections can be positive or negative, for example, the number of corrections can be 1, 2, 3, 4, 5, etc., or -1, -2, -3, -4, -5, etc.; after one correction, the target low pressure in the formula will be replaced with the original target low pressure in the next correction. For example, if the target low pressure after the first correction is 10 bar, the original target low pressure will be 10 bar in the second correction.

[0094] In addition, the number of corrections is 0 before any control method is executed, and the number of corrections will return to 0 when the indoor air conditioner 10 or the outdoor air conditioner 20 is turned off.

[0095] In some implementations, the control method includes:

[0096] The number of times the original target low-pressure was corrected in the same direction was less than the predetermined number.

[0097] Please see Figure 3In some implementations, the controller 40 is used to control the original target low pressure to be corrected in the same direction fewer times than a predetermined number of times.

[0098] Please see Figure 4 In some implementations, the control module 203 is used to control the original target low pressure to be corrected in the same direction a number of times less than a predetermined number of times.

[0099] In this way, the number of times the original target low pressure is corrected in the same direction is less than the predetermined number. This can reduce the probability that the original target low pressure will continue to increase or decrease in the same direction during the correction process, thereby reducing the probability that the target low pressure is too high or too low, and thus reducing the probability of increased condensation risk, or reducing the probability of abnormal temperature in the air conditioning system 100.

[0100] Specifically, the number of reservations can be set according to actual needs. For example, the number of reservations can be 6, 7, 8, 9, 10, etc.

[0101] In some implementations, the control method includes:

[0102] When the difference is greater than the second threshold and continues for a second predetermined duration, the original target low pressure is increased.

[0103] Please see Figure 3 In some implementations, the controller 40 is used to increase the original target low pressure when the difference is greater than a second threshold and continues for a second predetermined duration.

[0104] Please see Figure 4 In some implementations, the control module 203 is used to increase the original target low pressure when the difference is greater than a second threshold and continues for a second predetermined duration.

[0105] Thus, when the difference is greater than the second threshold and continues for a second predetermined duration, the original target low pressure is increased, which can increase the outlet air temperature and thus reduce the probability of condensation. In addition, the second predetermined duration can reduce the probability of false triggering of the correction of the original target low pressure.

[0106] Specifically, the second threshold can be a critical value at which condensation is likely to occur. Depending on the actual situation, the second threshold can vary; for example, it can be 3°C, 3.5°C, 4°C, 4.5°C, 5°C, etc. Similarly, the second predetermined duration can be 60 min, 62 min, 65 min, 67 min, 70 min, etc. In one embodiment, the second threshold is 3°C, and the second predetermined duration is 60 min. When the difference between the actual dew point temperature and the actual outlet air temperature is greater than 3°C and persists for 60 min, the original target low-pressure pressure is increased.

[0107] Furthermore, after increasing the original target low-pressure, a judgment can be made after each judgment time interval. The judgment time can be set according to requirements, for example, it can be 5 minutes, 5.5 minutes, 6 minutes, 6.5 minutes, 7 minutes, etc. In one embodiment, the original target low-pressure can be 10 bar, the second threshold can be 3°C, the judgment time is 5 minutes, and the coefficient A is 0.5. When the difference between the actual dew point temperature and the actual outlet air temperature is 3.5°C, according to the formula for the original target low-pressure and the target low-pressure, the target low-pressure should be 10.5 bar. After 5 minutes, a new judgment is made. If the difference is 4°C, the target low-pressure should be 11.5 bar.

[0108] It is worth noting that the values ​​here are examples for ease of understanding and should not be construed as limiting the implementation of the present invention.

[0109] In some implementations, the control method includes:

[0110] The greater the difference between the actual dew point temperature and the actual outlet air temperature, the shorter the second scheduled duration.

[0111] Please see Figure 3 In some implementations, the controller 40 is used to control the second predetermined duration to decrease when the difference becomes larger.

[0112] Please see Figure 4 In some implementations, the control module 203 is used to control the second predetermined duration to decrease when the difference increases.

[0113] It is understandable that the greater the difference between the actual dew point temperature and the actual outlet air temperature, the greater the probability of condensation. Therefore, setting the second predetermined duration to a shorter duration can effectively reduce the probability of condensation.

[0114] Specifically, when the difference between the actual dew point temperature and the actual outlet air temperature is greater than 3°C, for example, when the difference is 3.5°C, the second predetermined duration can be 60 minutes; when the difference between the actual dew point temperature and the actual outlet air temperature is greater than 3°C, for example, when the difference is 4.5°C, the second predetermined duration can be 30 minutes.

[0115] In some implementations, the control method includes:

[0116] When the difference is less than or equal to the third threshold and continues for a third predetermined duration, the original target low pressure is reduced. The second threshold is greater than the third threshold, and the second predetermined duration is less than the third predetermined duration.

[0117] Please see Figure 3In some implementations, the controller 40 is used to reduce the original target low pressure when the difference is less than or equal to a third threshold and lasts for a third predetermined duration, wherein the second threshold is greater than the third threshold and the second predetermined duration is less than the third predetermined duration.

[0118] Please see Figure 4 In some implementations, the control module 203 is used to reduce the original target low pressure when the difference is less than or equal to a third threshold and lasts for a third predetermined duration, wherein the second threshold is greater than the third threshold and the second predetermined duration is less than the third predetermined duration.

[0119] Thus, when the difference is less than or equal to the third threshold and continues for a third predetermined duration, the original target low pressure is reduced, which can reduce the outlet air temperature, thereby reducing the probability of fluctuations in ambient temperature and humidity, thus ensuring the cooling or dehumidification effect; in addition, the third predetermined duration can reduce the probability of false triggering of the correction of the original target low pressure.

[0120] Specifically, the third threshold can be a critical value where environmental temperature and humidity fluctuations are likely to occur. Depending on the actual situation, the third threshold can vary; for example, it could be -2℃, -2.5℃, -3℃, -3.5℃, -4℃, etc. Similarly, the third predetermined duration can be 10 min, 12 min, 15 min, 17 min, 20 min, etc. In one embodiment, the third threshold is -2℃. When the difference between the actual dew point temperature and the actual outlet air temperature is less than or equal to -2℃ and remains so for 10 min, the original target low-pressure pressure is reduced.

[0121] Furthermore, after reducing the original target low-pressure, a judgment can be made after each judgment time interval. The judgment time can be set according to requirements, for example, 5 minutes, 5.5 minutes, 6 minutes, 6.5 minutes, 7 minutes, etc. In one embodiment, the original target low-pressure can be 10 bar, the third threshold can be -2°C, the judgment time is 5 minutes, and the coefficient A is 0.5. When the difference between the actual dew point temperature and the actual outlet air temperature is -2°C, according to the formula for the original target low-pressure and the target low-pressure, the target low-pressure should be 9.5 bar. After 5 minutes, a new judgment is made. If the difference is -2.5°C, the target low-pressure should be 8.5 bar.

[0122] It is worth noting that the values ​​here are examples for ease of understanding and should not be construed as limiting the implementation of the present invention.

[0123] In some implementations, the control method includes:

[0124] When the difference is greater than the third threshold and less than or equal to the second threshold, the original target low pressure is adjusted again after the determined number of adjustments.

[0125] Please see Figure 3 In some implementations, the controller 40 is used to continue correcting the original target low pressure after a determined number of corrections when the difference is greater than a third threshold and less than or equal to a second threshold.

[0126] Please see Figure 4 In some implementations, the control module 203 is used to continue correcting the original target low pressure after determining the number of corrections when the difference is greater than a third threshold and less than or equal to a second threshold.

[0127] Thus, when the difference is greater than the third threshold and less than or equal to the second threshold, the original target low-pressure pressure is corrected again after the determined number of corrections. This ensures the stability of the correction and prevents the correction process from fluctuating too much.

[0128] Specifically, "continued correction" means retaining the logic of the previous correction unchanged. For example, if the second threshold is 3℃ and the third threshold is -2℃, when the first correction occurs, the difference is greater than 3℃, and the correction count is 1. When the second correction occurs, the difference is greater than -2℃ and less than 3℃, and the correction count remains 1. It is only necessary to replace the original target low-pressure pressure with the target low-pressure pressure after the first correction.

[0129] Furthermore, a judgment can be performed after each judgment time interval. The judgment time can be set according to requirements, for example, it can be 5 minutes, 5.5 minutes, 6 minutes, 6.5 minutes, 7 minutes, etc. In one embodiment, the original target low pressure can be 10 bar, the second threshold is 3°C, the third threshold is -2°C, the judgment time is 5 minutes, and the coefficient A is 0.5. When the difference between the actual dew point temperature and the actual outlet air temperature is 3°C, according to the formula for the original target low pressure and the target low pressure, the target low pressure should be 10.5 bar. After 5 minutes, a new judgment is made. If the difference is 2.5°C, the target low pressure should be 11 bar.

[0130] It is worth noting that the values ​​here are examples for ease of understanding and should not be construed as limiting the implementation of the present invention.

[0131] In some implementations, the original target low-pressure pressure is corrected based on the difference to obtain the target low-pressure pressure (step S32), including:

[0132] Obtain the outdoor ambient temperature;

[0133] The original target low-pressure is determined based on the outdoor ambient temperature; the higher the outdoor ambient temperature, the higher the original target low-pressure.

[0134] Please see Figure 3In some embodiments, the controller 40 is used to acquire the outdoor ambient temperature; and to determine the original target low pressure based on the outdoor ambient temperature, wherein the higher the outdoor ambient temperature, the higher the original target low pressure.

[0135] Please see Figure 4 In some implementations, the acquisition module 201 is used to acquire the outdoor ambient temperature; the confirmation module 204 is used to determine the original target low pressure based on the outdoor ambient temperature, wherein the higher the outdoor ambient temperature, the higher the original target low pressure.

[0136] In this way, determining the initial target low-pressure based on the outdoor ambient temperature ensures the optimal performance of the air conditioning system. For example, when the outdoor ambient temperature is high, the initial target low-pressure can be increased accordingly to enhance the cooling effect; when the outdoor ambient temperature is low, the initial target low-pressure can be decreased to prevent the indoor temperature from becoming too low.

[0137] Specifically, the outdoor ambient temperature can be obtained through the outdoor ambient temperature sensor 90 installed inside the outdoor air conditioner 20. Please refer to Table 1, which shows the original target low pressure gauge corresponding to different outdoor ambient temperatures.

[0138] Table 1:

[0139] Outdoor ambient temperature Te / ℃ Original target low pressure / bar 41 < Te 10～12 23<Te≤41 8～9 18<Te≤23 6～7.5 Te≤18 5～6

[0140] As shown in Table 1, the outdoor ambient temperature is higher in the higher temperature range and lower in the lower temperature range. The original target low pressure is a range value; therefore, the target low pressure obtained by correcting the original target low pressure is also a range value.

[0141] Please see Figure 7 In some embodiments, based on a comparison between the target low-pressure and the current low-pressure, the speed of the compressor 70 is controlled to adjust the outlet air temperature (step S50), including:

[0142] S51, when the current low pressure is greater than the target low pressure, increase the compressor speed of the outdoor air conditioner 20 to reduce the outlet air temperature;

[0143] S52, when the current low pressure is lower than the target low pressure, reduce the compressor speed of the outdoor air conditioner 20 to increase the outlet air temperature.

[0144] Please see Figure 3In some embodiments, the controller 40 is used to increase the speed of the compressor 70 of the outdoor air conditioner 20 to reduce the outlet air temperature when the current low pressure is greater than the target low pressure; and to reduce the speed of the compressor 70 of the outdoor air conditioner 20 to increase the outlet air temperature when the current low pressure is less than the target low pressure.

[0145] Please see Figure 4 In some embodiments, the control module 203 is used to increase the speed of the compressor 70 of the outdoor air conditioner 20 when the current low pressure is greater than the target low pressure; and to decrease the speed of the compressor 70 of the outdoor air conditioner 20 when the current low pressure is less than the target low pressure.

[0146] In this way, by adjusting the compressor speed of the outdoor air conditioner 20 to 70, the current low pressure will be adjusted to the target low pressure, thereby adjusting the actual air outlet temperature to a suitable range and reducing the probability of condensation.

[0147] Specifically, when the current low pressure is greater than the target low pressure, the compressor speed of the outdoor air conditioner 20 is increased, thereby reducing the current low pressure and thus reducing the outlet air temperature; when the current low pressure is less than the target low pressure, the compressor speed of the outdoor air conditioner 20 is reduced, thereby increasing the current low pressure and thus increasing the outlet air temperature.

[0148] The non-volatile computer-readable storage medium of computer-executable instructions according to embodiments of the present invention is characterized in that, when the computer-executable instructions are executed by one or more processors, the processors execute the control method of any of the above embodiments.

[0149] Specifically, the processor can execute any step in the control method.

[0150] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0151] The logic and / or steps represented in the flowchart or otherwise described herein. For example, a sequence of executable instructions for implementing logical functions can be considered as such, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processing module, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0152] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0153] It should be understood that various parts of the embodiments of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0154] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0155] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0156] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0157] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0158] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for an air conditioning system, characterized in that, The control method includes: When the air conditioning system is operating in cooling or dehumidification mode, the actual dew point temperature of the indoor environment is obtained; The actual air outlet temperature of the indoor air conditioner is obtained. The indoor air conditioner includes an indoor heat exchanger and a rectifier plate located on the air outlet side of the indoor heat exchanger. When the actual dew point temperature is greater than or equal to the first threshold and continues for a first predetermined duration, the target low pressure of the outdoor air conditioner is calculated. Obtain the current low-pressure reading of the outdoor air conditioner; Based on the comparison between the target low pressure and the current low pressure, the compressor speed of the outdoor air conditioner is controlled to adjust the outlet air temperature; Wherein, when the actual dew point temperature is greater than or equal to a first threshold and continues for a first predetermined duration, the target low-pressure of the outdoor air conditioner is calculated, including: Calculate the difference between the actual dew point temperature and the actual outlet air temperature; The original target low-pressure pressure is corrected based on the difference to obtain the target low-pressure pressure; The step of correcting the original target low-pressure pressure based on the difference to obtain the target low-pressure pressure includes: Based on the difference, determine the number of corrections; The original target low-pressure pressure is corrected in a gradient manner based on the number of corrections. The number of times the original target low-pressure pressure is corrected in the same direction is less than a predetermined number.

2. The control method according to claim 1, characterized in that, The control method includes: When the difference is greater than the second threshold and continues for a second predetermined duration, the original target low pressure is increased.

3. The control method according to claim 2, characterized in that, The control method includes: The larger the difference, the smaller the second predetermined duration.

4. The control method according to claim 2, characterized in that, The control method includes: When the difference is less than or equal to the third threshold and continues for a third predetermined duration, the original target low pressure is reduced, wherein the second threshold is greater than the third threshold and the second predetermined duration is less than the third predetermined duration.

5. The control method according to claim 4, characterized in that, The control method includes: When the difference is greater than the third threshold and less than or equal to the second threshold, the original target low pressure is corrected again after a certain number of corrections.

6. The control method according to claim 1, characterized in that, The original target low-pressure pressure is corrected based on the difference to obtain the target low-pressure pressure, including: Obtain the outdoor ambient temperature; The original target low pressure is determined based on the outdoor ambient temperature; the higher the outdoor ambient temperature, the higher the original target low pressure.

7. The control method according to claim 1, characterized in that, Based on the comparison between the target low pressure and the current low pressure, controlling the compressor speed to adjust the outlet air temperature includes: When the current low pressure is greater than the target low pressure, the compressor speed of the outdoor air conditioner is increased to reduce the outlet air temperature; When the current low pressure is less than the target low pressure, the compressor speed of the outdoor air conditioner is reduced to increase the outlet air temperature.

8. An air conditioning system, characterized in that, The air conditioning system includes an indoor air conditioner, an outdoor air conditioner, a memory, and a controller. The indoor air conditioner includes an indoor heat exchanger and a rectifier plate located on the air outlet side of the indoor heat exchanger. The memory is used to store a computer program, and the controller is used to execute the computer program to implement the control method according to any one of claims 1-7.

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