Control method, air conditioning device, and computer-readable storage medium

Abstract

The present invention discloses a control method, air conditioning equipment, and computer-readable storage medium. The air conditioning equipment includes a compressor, a first heat exchanger, and a second heat exchanger connected in sequence, and also includes a first electronic expansion valve and a second electronic expansion valve connected in parallel in a pipeline between the first heat exchanger and the second heat exchanger. The control method includes: obtaining the compressor outlet pressure; when the compressor outlet pressure is within a preset pressure range, executing a first control mode: controlling the opening of the first electronic expansion valve according to the compressor suction temperature and closing the second electronic expansion valve; when the compressor outlet pressure is less than the lower limit of the preset pressure range, executing a second control mode: controlling the opening of the second electronic expansion valve according to the compressor suction temperature and closing the first electronic expansion valve; when the compressor outlet pressure is greater than the upper limit of the preset pressure range, executing a third control mode: controlling the opening of the first electronic expansion valve according to the compressor suction temperature and controlling the second electronic expansion valve to a preset opening.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method, air conditioning equipment and a computer-readable storage medium. Background Art

[0002] Air conditioners include compressors, which must operate within a reasonable operating pressure range to ensure their lifespan. However, the compressor's operating pressure is often affected by the ambient temperature in which the air conditioner is used. Changes in ambient temperature can cause the pressure to be too high or too low, affecting the compressor's normal operation. Summary of the Invention

[0003] The embodiments of the present invention provide a control method, an air conditioning device, and a computer-readable storage medium to solve at least one of the above-mentioned technical problems.

[0004] A control method according to an embodiment of the present invention is used for air conditioning equipment, the air conditioning equipment including a compressor, a first heat exchanger, and a second heat exchanger connected in sequence, the air conditioning equipment also including a first electronic expansion valve and a second electronic expansion valve connected in parallel in a pipeline between the first heat exchanger and the second heat exchanger, wherein the maximum flow rate of the second electronic expansion valve is less than the maximum flow rate of the first electronic expansion valve, the control method comprising:

[0005] Obtaining the outlet pressure of the compressor;

[0006] When the outlet pressure of the compressor is within a preset pressure range, executing a first control mode, the first control mode comprising: controlling the opening of the first electronic expansion valve according to the suction temperature of the compressor, and closing the second electronic expansion valve;

[0007] When the outlet pressure of the compressor is less than the lower limit of the preset pressure range, executing a second control mode, the second control mode comprising: controlling the opening of the second electronic expansion valve according to the suction temperature of the compressor, and closing the first electronic expansion valve;

[0008] When the outlet pressure of the compressor is greater than the upper limit of the preset pressure range, a third control mode is executed. The third control mode includes: controlling the opening of the first electronic expansion valve according to the suction temperature of the compressor, and controlling the second electronic expansion valve to be at a preset opening.

[0009] In the above control method, when the outlet pressure of the compressor is within the preset pressure range, the outlet pressure of the compressor is moderate; when the outlet pressure of the compressor is less than the lower limit of the preset pressure range, the outlet pressure of the compressor is low; when the outlet pressure of the compressor is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve can be controlled according to the suction temperature of the compressor, and the second electronic expansion valve can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve is controlled, and the first electronic expansion valve is closed. When the outlet pressure is high, the openings of the first electronic expansion valve and the second electronic expansion valve are controlled, thereby ensuring that the operating pressure of the compressor is maintained within a normal range, so that the compressor operates normally.

[0010] In some embodiments, the preset opening is the maximum opening of the second electronic expansion valve.

[0011] In some embodiments, the first control mode is executed when the outlet pressure of the compressor changes from less than the lower limit of the preset pressure interval to greater than a first set value, and the first set value is greater than the lower limit of the preset pressure interval and less than the upper limit of the preset pressure interval.

[0012] In some embodiments, the first control mode is executed when the outlet pressure of the compressor changes from greater than the upper limit of the preset pressure range to less than a second set value, the second set value is greater than the lower limit of the preset pressure range and less than the upper limit of the preset pressure range, and the second set value is greater than the first set value.

[0013] In certain embodiments, the suction temperature of the compressor is negatively correlated with the opening of the first electronic expansion valve;

[0014] The suction temperature of the compressor is negatively correlated with the opening degree of the second electronic expansion valve.

[0015] In certain embodiments, the inhalation temperature ranges from 10°C to 14°C.

[0016] In some embodiments, in the first control mode and the third control mode, the opening adjustment range of the first electronic expansion valve is 80p to 480p;

[0017] In the second control mode, the opening adjustment range of the second electronic expansion valve is 80° to 480°.

[0018] An air conditioning device according to an embodiment of the present invention includes a controller, a compressor, a first heat exchanger, a second heat exchanger, a first electronic expansion valve, and a second electronic expansion valve. The compressor, the first heat exchanger, and the second heat exchanger are sequentially connected to form a circulation loop. The first electronic expansion valve and the second electronic expansion valve are connected in parallel to a pipeline between the first heat exchanger and the second heat exchanger. The maximum flow rate of the second electronic expansion valve is less than the maximum flow rate of the first electronic expansion valve. The controller is electrically connected to the compressor, the first electronic expansion valve, and the second electronic expansion valve. The controller is configured to:

[0019] Obtaining the outlet pressure of the compressor;

[0020] When the outlet pressure of the compressor is within a preset pressure range, executing a first control mode, the first control mode comprising: controlling the opening of the first electronic expansion valve according to the suction temperature of the compressor, and closing the second electronic expansion valve;

[0021] When the outlet pressure of the compressor is less than the lower limit of the preset pressure range, executing a second control mode, the second control mode comprising: controlling the opening of the second electronic expansion valve according to the suction temperature of the compressor, and closing the first electronic expansion valve;

[0022] When the outlet pressure of the compressor is greater than the upper limit of the preset pressure range, a third control mode is executed. The third control mode includes: controlling the opening of the first electronic expansion valve according to the suction temperature of the compressor, and controlling the second electronic expansion valve to be at a preset opening.

[0023] In the above-mentioned air-conditioning equipment, when the outlet pressure of the compressor is within the preset pressure range, the outlet pressure of the compressor is moderate; when the outlet pressure of the compressor is less than the lower limit of the preset pressure range, the outlet pressure of the compressor is low; when the outlet pressure of the compressor is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve can be controlled according to the suction temperature of the compressor, and the second electronic expansion valve can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve is controlled, and the first electronic expansion valve is closed. When the outlet pressure is high, the openings of the first electronic expansion valve and the second electronic expansion valve are controlled, thereby ensuring that the operating pressure of the compressor is maintained within the normal range, so that the compressor operates normally.

[0024] In some embodiments, the preset opening is the maximum opening of the second electronic expansion valve.

[0025] In some embodiments, the first control mode is executed when the outlet pressure of the compressor changes from less than the lower limit of the preset pressure interval to greater than a first set value, and the first set value is greater than the lower limit of the preset pressure interval and less than the upper limit of the preset pressure interval.

[0026] In some embodiments, the first control mode is executed when the outlet pressure of the compressor changes from greater than the upper limit of the preset pressure range to less than a second set value, the second set value is greater than the lower limit of the preset pressure range and less than the upper limit of the preset pressure range, and the second set value is greater than the first set value.

[0027] An air conditioning device according to an embodiment of the present invention includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the control method described in any one of the above embodiments are implemented.

[0028] In the above-mentioned air-conditioning equipment, when the outlet pressure of the compressor is within the preset pressure range, the outlet pressure of the compressor is moderate; when the outlet pressure of the compressor is less than the lower limit of the preset pressure range, the outlet pressure of the compressor is low; when the outlet pressure of the compressor is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve can be controlled according to the suction temperature of the compressor, and the second electronic expansion valve can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve is controlled, and the first electronic expansion valve is closed. When the outlet pressure is high, the openings of the first electronic expansion valve and the second electronic expansion valve are controlled, thereby ensuring that the operating pressure of the compressor is maintained within the normal range, so that the compressor operates normally.

[0029] A computer-readable storage medium according to an embodiment of the present invention stores a computer program, which, when executed by a processor, implements the steps of the control method described in any one of the above embodiments.

[0030] In the above-mentioned computer-readable storage medium, when the outlet pressure of the compressor is within the preset pressure range, the outlet pressure of the compressor is moderate; when the outlet pressure of the compressor is less than the lower limit of the preset pressure range, the outlet pressure of the compressor is low; when the outlet pressure of the compressor is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve can be controlled according to the suction temperature of the compressor, and the second electronic expansion valve can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve can be controlled, and the first electronic expansion valve can be closed. When the outlet pressure is high, the openings of the first electronic expansion valve and the second electronic expansion valve can be controlled, thereby ensuring that the operating pressure of the compressor is maintained within a normal range, so that the compressor operates normally.

[0031] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which:

[0033] Figure 1 is a flow chart of a control method according to an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the piping connection of the air-conditioning equipment according to the embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of a module of an air-conditioning device according to an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of another module of the air-conditioning equipment according to the embodiment of the present invention.

[0037] Reference numerals:

[0038] Air conditioning equipment-100; compressor-10; first heat exchanger-12; second heat exchanger-14; first electronic expansion valve-16; second electronic expansion valve-18; pipeline-20; pressure sensor-22; temperature sensor-24; fan-26; controller-28; inlet-30; outlet-32; memory-34; processor-36. DETAILED DESCRIPTION

[0039] The 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 throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] The disclosure herein provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0044] Please refer to Figure 1 and Figure 2 A control method according to an embodiment of the present invention is used for an air conditioning device 100. The air conditioning device 100 includes a compressor 10, a first heat exchanger 12, and a second heat exchanger 14 connected in sequence. The air conditioning device 100 also includes a first electronic expansion valve 16 and a second electronic expansion valve 18 connected in parallel in a pipeline 20 between the first heat exchanger 12 and the second heat exchanger 14. The maximum flow rate of the second electronic expansion valve 18 is less than the maximum flow rate of the first electronic expansion valve 16. The control method includes:

[0045] Step 001: Obtain the outlet pressure of the compressor 10;

[0046] Step 002: When the outlet pressure of the compressor 10 is within a preset pressure range, executing a first control mode, the first control mode including: controlling the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and closing the second electronic expansion valve 18;

[0047] Step 003: When the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, executing the second control mode, which includes: controlling the opening of the second electronic expansion valve 18 according to the suction temperature of the compressor 10, and closing the first electronic expansion valve 16;

[0048] Step 004: When the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the third control mode is executed. The third control mode includes: controlling the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and controlling the second electronic expansion valve 18 to be at a preset opening.

[0049] In the above control method, when the outlet pressure of the compressor 10 is within the preset pressure range, the outlet pressure of the compressor 10 is moderate; when the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, the outlet pressure of the compressor 10 is low; when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor 10 is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve 16 can be controlled according to the suction temperature of the compressor 10, and the second electronic expansion valve 18 can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve 18 is controlled, and the first electronic expansion valve 16 is closed. When the outlet pressure is high, the openings of the first electronic expansion valve 16 and the second electronic expansion valve 18 are controlled, so as to ensure that the operating pressure of the compressor 10 is maintained within the normal range, so that the compressor 10 operates normally.

[0050] Specifically, in Figure 2 In the illustrated embodiment, the air conditioning apparatus 100 further includes a pipeline 20. The compressor 10, the first heat exchanger 12, and the second heat exchanger 14 may be sequentially connected via the pipeline 20. The first electronic expansion valve 16 and the second electronic expansion valve 18 may be connected in parallel and connected between the pipeline 20 of the first heat exchanger 12 and the second heat exchanger 14. The first heat exchanger 12 may be a finned condenser. The second heat exchanger 14 may be a finned evaporator. The maximum flow rate of the second electronic expansion valve 18 is less than the maximum flow rate of the first electronic expansion valve 16, and the maximum flow rate may be the flow rate when the first electronic expansion valve 16 and the second electronic expansion valve 18 are at their maximum opening. In one embodiment, the maximum flow rate of the first electronic expansion valve 16 may be twice the maximum flow rate of the second electronic expansion valve 18.

[0051] The air conditioner 100 can detect and obtain the outlet pressure of the compressor 10, and then compare the outlet pressure of the compressor 10 with a preset pressure range. Based on the comparison results of the outlet pressure of the compressor 10 and the preset pressure range, the air conditioner 100 can implement three control modes. In one embodiment, when the outlet pressure of the compressor 10 is within the preset pressure range, the air conditioner 100 can implement the first control mode. In the first control mode, the air conditioner 100 controls the opening of the first electronic expansion valve 16 based on the intake temperature of the compressor 10, and simultaneously closes the second electronic expansion valve 18, so that the refrigerant flows only through the first electronic expansion valve 16. In one embodiment, when the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, the air conditioner 100 can implement the second control mode. In the second control mode, the air conditioner 100 controls the opening of the second electronic expansion valve 18 based on the intake temperature of the compressor 10, and simultaneously closes the first electronic expansion valve 16, so that the refrigerant flows only through the second electronic expansion valve 18. In one embodiment, when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the air-conditioning equipment 100 can execute a third control mode. In the third control mode, the air-conditioning equipment 100 can control the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and at the same time control the second electronic expansion valve 18 to be at a preset opening. At this time, dual-valve parallel adjustment is adopted so that the refrigerant can flow through the first electronic expansion valve 16 and the second electronic expansion valve 18. That is to say, when the outlet pressure of the compressor 10 is within the preset pressure range, the outlet pressure of the compressor 10 is moderate; when the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, the outlet pressure of the compressor 10 is low; when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor 10 is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve 16 can be controlled according to the suction temperature of the compressor 10, and the second electronic expansion valve 18 can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve 18 is controlled, and the first electronic expansion valve 16 is closed. When the outlet pressure is high, the openings of the first electronic expansion valve 16 and the second electronic expansion valve 18 are controlled, so as to ensure that the operating pressure of the compressor 10 is maintained within the normal range, so that the compressor 10 operates normally.

[0052] It should be noted that the preset pressure range may be greater than or equal to 2.2 MPa (megapascals) and less than or equal to 3.8 MPa. The lower limit of the preset pressure range may be 2.2 MPa, and the upper limit of the preset pressure range may be 3.8 MPa. MPa is the unit of pressure.

[0053] Additionally, the first electronic expansion valve 16 can be a standard electronic expansion valve that matches the cooling capacity. Standard electronic expansion valves are selected to match the cooling capacity. Generally, the flow rate adjustment rate can be used to indicate the rate of change of cooling capacity. If the flow rate adjustment rate is too fast, i.e., when using an electronic expansion valve with a low flow rate, the intake air temperature can change rapidly, causing fluctuations in the air conditioning system 100. If the flow rate adjustment rate is too slow, i.e., when using an electronic expansion valve with a high flow rate, the intake air temperature changes slowly, resulting in untimely adjustment.

[0054] In some embodiments, the preset opening degree is the maximum opening degree of the second electronic expansion valve 18 .

[0055] In this way, dual-valve parallel control is adopted, and the second electronic expansion valve is adjusted to the maximum opening, which helps to reduce the outlet pressure of the compressor 10.

[0056] Specifically, in one embodiment, when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the air-conditioning equipment 100 can execute the third control mode. In the third control mode, the air-conditioning equipment 100 can control the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and at the same time control the second electronic expansion valve 18 to be at the maximum opening, so that the air-conditioning equipment 100 adopts dual-valve parallel control, and the second electronic expansion is adjusted to the maximum opening, which helps to reduce the outlet pressure of the compressor 10.

[0057] In some embodiments, the first control mode is executed when the outlet pressure of the compressor 10 changes from less than the lower limit of the preset pressure range to greater than a first set value. The first set value is greater than the lower limit of the preset pressure range and less than the upper limit of the preset pressure range.

[0058] In this way, the outlet pressure of the compressor 10 changes from low to moderate, and the air-conditioning device 100 can resume executing the first control mode to ensure the normal operation of the compressor 10.

[0059] Specifically, in one embodiment, the first set value may be 2.6 MPa. When the outlet pressure of the compressor 10 changes from less than the lower limit of the preset pressure range, 2.2 MPa, to greater than 2.6 MPa, the air conditioner 100 may resume execution of the first control mode. The air conditioner 100 may control the opening of the first electronic expansion valve 16 based on the suction temperature of the compressor 10 and simultaneously close the second electronic expansion valve 18, allowing refrigerant to flow only through the first electronic expansion valve 16. This causes the outlet pressure of the compressor 10 to change from a low level to a moderate level. The air conditioner 100 may then resume execution of the first control mode, ensuring normal operation of the compressor 10. The first set value of 2.6 MPa is greater than the lower limit of the preset pressure range, 2.2 MPa, and less than the upper limit of the preset pressure range, 3.8 MPa.

[0060] In some embodiments, the first control mode is executed when the outlet pressure of the compressor 10 changes from being greater than the upper limit of the preset pressure range to being less than a second set value. The second set value is greater than the lower limit of the preset pressure range and less than the upper limit of the preset pressure range. The second set value is greater than the first set value.

[0061] In this way, the outlet pressure of the compressor 10 changes from high to moderate, and the air-conditioning device 100 can resume executing the first control mode to ensure the normal operation of the compressor 10.

[0062] Specifically, in one embodiment, the second set value may be 3.6 MPa. When the outlet pressure of the compressor 10 changes from greater than the upper limit of the preset pressure range, 3.8 MPa, to less than 3.6 MPa, the air conditioner 100 may resume execution of the first control mode. The air conditioner 100 may control the opening of the first electronic expansion valve 16 based on the intake temperature of the compressor 10 and simultaneously close the second electronic expansion valve 18, allowing refrigerant to flow only through the first electronic expansion valve 16. This causes the outlet pressure of the compressor 10 to change from a high level to a moderate level. The air conditioner 100 may then resume execution of the first control mode, ensuring normal operation of the compressor 10. The second set value of 3.6 MPa is greater than the lower limit of the preset pressure range, 2.2 MPa, and less than the upper limit of the preset pressure range, 3.8 MPa. The second set value of 3.6 MPa is greater than the first set value of 2.6 MPa.

[0063] In some embodiments, the suction temperature of the compressor 10 is negatively correlated with the opening degree of the first electronic expansion valve 16 . The suction temperature of the compressor 10 is negatively correlated with the opening degree of the second electronic expansion valve 18 .

[0064] In this way, a reasonable intake temperature can be controlled, which facilitates adjustment of the openings of the first electronic expansion valve 16 and the second electronic expansion valve 18 so that the outlet pressure of the compressor 10 can be maintained at a normal level.

[0065] Specifically, in one embodiment, the higher the intake temperature of the compressor 10, the smaller the opening of the first electronic expansion valve 16. The lower the intake temperature of the compressor 10, the larger the opening of the first electronic expansion valve 16. In one embodiment, the higher the intake temperature of the compressor 10, the smaller the opening of the second electronic expansion valve 18. The lower the intake temperature of the compressor 10, the larger the opening of the second electronic expansion valve 18.

[0066] In certain embodiments, the inhalation temperature ranges from 10°C to 14°C.

[0067] In this way, the suction temperature can be controlled within a reasonable range, making it easier to adjust.

[0068] Specifically, in one embodiment, the intake temperature is controlled within a reasonable range of 10°C to 14°C, which facilitates adjustment of the first electronic expansion valve 16 and the second electronic expansion valve 18. In addition, if the intake temperature is too high or too low, the compression conversion of the compressor 10 is also not conducive.

[0069] In one example, the inhalation temperature may be 10°C, 11°C, 12°C, 13°C, 14°C, or another value between 10°C and 14°C.

[0070] In some embodiments, in the first control mode and the third control mode, the opening adjustment range of the first electronic expansion valve 16 is 80p to 480p. In the second control mode, the opening adjustment range of the second electronic expansion valve 18 is 80p to 480p.

[0071] In this way, the openings of the first electronic expansion valve 16 and the second electronic expansion valve 18 can be adjusted according to the suction temperature of the compressor 10 in the corresponding control mode.

[0072] Specifically, in one embodiment, in the first control mode and the third control mode, the opening degree of the first electronic expansion valve 16 may be 80p, 90p, 100p, 110p, 120p, 130p, 140p, 150p, 160p, 170p, 180p, 190p, 200p, 210p, 220p, 230p, 240p, 250p, 260p, 270p, 280p, 290p, 300p, 310p, 320p, 330p, 340p, 350p, 360p, 370p, 380p, 390p, 400p, 410p, 420p, 430p, 440p, 450p, 460p, 470p, 480p or other values ​​between 80p and 480p. p is the opening unit of the electronic expansion valve, such as 80p is 80 pulses.

[0073] In one embodiment, in the second control mode, the opening degree of the second electronic expansion valve 18 may be 80p, 90p, 100p, 110p, 120p, 130p, 140p, 150p, 160p, 170p, 180p, 190p, 200p, 210p, 220p, 230p, 240p, 250p, 260p, 270p, 280p, 290p, 300p, 310p, 320p, 330p, 340p, 350p, 360p, 370p, 380p, 390p, 400p, 410p, 420p, 430p, 440p, 450p, 460p, 470p, 480p or other values ​​between 80p and 480p.

[0074] Please refer to Figure 1 、 Figure 2 and Figure 3 An air conditioning device 100 according to an embodiment of the present invention includes a controller 28, a compressor 10, a first heat exchanger 12, a second heat exchanger 14, a first electronic expansion valve 16, and a second electronic expansion valve 18. The compressor 10, the first heat exchanger 12, and the second heat exchanger 14 are sequentially connected to form a circulation loop. The first electronic expansion valve 16 and the second electronic expansion valve 18 are connected in parallel to a pipe 20 between the first heat exchanger 12 and the second heat exchanger 14. The maximum flow rate of the second electronic expansion valve 18 is less than the maximum flow rate of the first electronic expansion valve 16. The controller 28 is electrically connected to the compressor 10, the first electronic expansion valve 16 and the second electronic expansion valve 18. The controller 28 is used to: obtain the outlet pressure of the compressor 10; when the outlet pressure of the compressor 10 is within the preset pressure range, execute the first control mode, the first control mode including: controlling the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and closing the second electronic expansion valve 18; when the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, execute the second control mode, the second control mode including: controlling the opening of the second electronic expansion valve 18 according to the suction temperature of the compressor 10, and closing the first electronic expansion valve 16; when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, execute the third control mode, the third control mode including: controlling the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and controlling the second electronic expansion valve 18 to be at a preset opening.

[0075] In the above-mentioned air-conditioning equipment 100, when the outlet pressure of the compressor 10 is within the preset pressure range, the outlet pressure of the compressor 10 is moderate; when the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, the outlet pressure of the compressor 10 is low; when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor 10 is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve 16 can be controlled according to the suction temperature of the compressor 10, and the second electronic expansion valve 18 can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve 18 is controlled, and the first electronic expansion valve 16 is closed. When the outlet pressure is high, the openings of the first electronic expansion valve 16 and the second electronic expansion valve 18 are controlled, thereby ensuring that the operating pressure of the compressor 10 is maintained within a normal range, so that the compressor 10 operates normally.

[0076] Specifically, in Figure 1In the illustrated embodiment, the air conditioning apparatus 100 further includes a pressure sensor 22 and a temperature sensor 24. The compressor 10 includes an inlet 30 and an outlet 32. The pressure sensor 22 may be disposed proximate to the outlet 32. The pressure sensor 22 may be configured to detect the outlet pressure of the outlet 32. The temperature sensor 24 may be disposed proximate to the inlet 30. The temperature sensor 24 may be configured to detect the intake air temperature at the inlet 30. The air conditioning apparatus 100 further includes a fan 26. The fan 26 may be disposed adjacent to the first heat exchanger 12 and the second heat exchanger 14. The controller 28 may be electrically connected to the pressure sensor 22 and the temperature sensor 24.

[0077] The pressure sensor 22 detects the outlet pressure of the compressor 10 and transmits the data to the controller 28. The controller 28 then obtains the compressor 10 outlet pressure and compares it with a preset pressure range. Based on the comparison results, the controller 28 can implement three control modes. In one embodiment, when the compressor 10 outlet pressure is within the preset pressure range, the controller 28 can implement the first control mode. In the first control mode, the controller 28 controls the opening of the first electronic expansion valve 16 based on the intake temperature of the compressor 10 and simultaneously closes the second electronic expansion valve 18, allowing refrigerant to flow only through the first electronic expansion valve 16. In one embodiment, when the compressor 10 outlet pressure is less than the lower limit of the preset pressure range, the controller 28 can implement the second control mode. In the second control mode, the controller 28 controls the opening of the second electronic expansion valve 18 based on the intake temperature of the compressor 10 and simultaneously closes the first electronic expansion valve 16, allowing refrigerant to flow only through the second electronic expansion valve 18. In one embodiment, when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the controller 28 can execute a third control mode. In the third control mode, the controller 28 can control the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and at the same time control the second electronic expansion valve 18 to be at a preset opening. At this time, dual-valve parallel adjustment is adopted so that the refrigerant can flow through the first electronic expansion valve 16 and the second electronic expansion valve 18.

[0078] Please combine Figure 4 An air conditioning device 100 according to an embodiment of the present invention includes a memory 34 and a processor 36. The memory 34 stores a computer program. When the processor 36 executes the computer program, the steps of the control method of any of the above embodiments are implemented.

[0079] For example, when the computer program is executed, the following steps may be implemented:

[0080] Step 001: Obtain the outlet pressure of the compressor 10;

[0081] Step 002: When the outlet pressure of the compressor 10 is within a preset pressure range, executing a first control mode, the first control mode including: controlling the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and closing the second electronic expansion valve 18;

[0082] Step 003: When the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, executing the second control mode, which includes: controlling the opening of the second electronic expansion valve 18 according to the suction temperature of the compressor 10, and closing the first electronic expansion valve 16;

[0083] Step 004: When the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the third control mode is executed. The third control mode includes: controlling the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and controlling the second electronic expansion valve 18 to be at a preset opening.

[0084] In the above-mentioned air-conditioning equipment 100, when the outlet pressure of the compressor 10 is within the preset pressure range, the outlet pressure of the compressor 10 is moderate; when the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, the outlet pressure of the compressor 10 is low; when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor 10 is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve 16 can be controlled according to the suction temperature of the compressor 10, and the second electronic expansion valve 18 can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve 18 is controlled, and the first electronic expansion valve 16 is closed. When the outlet pressure is high, the openings of the first electronic expansion valve 16 and the second electronic expansion valve 18 are controlled, thereby ensuring that the operating pressure of the compressor 10 is maintained within a normal range, so that the compressor 10 operates normally.

[0085] A computer-readable storage medium according to an embodiment of the present invention stores a computer program, which, when executed by the processor 36, implements the steps of the control method according to any of the above embodiments.

[0086] For example, when the computer program is executed, the following steps may be implemented:

[0087] Step 001: Obtain the outlet pressure of the compressor 10;

[0088] Step 002: When the outlet pressure of the compressor 10 is within a preset pressure range, executing a first control mode, the first control mode including: controlling the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and closing the second electronic expansion valve 18;

[0089] Step 003: When the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, executing the second control mode, which includes: controlling the opening of the second electronic expansion valve 18 according to the suction temperature of the compressor 10, and closing the first electronic expansion valve 16;

[0090] Step 004: When the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the third control mode is executed. The third control mode includes: controlling the opening of the first electronic expansion valve 16 according to the suction temperature of the compressor 10, and controlling the second electronic expansion valve 18 to be at a preset opening.

[0091] In the above-mentioned computer-readable storage medium, when the outlet pressure of the compressor 10 is within the preset pressure range, the outlet pressure of the compressor 10 is moderate; when the outlet pressure of the compressor 10 is less than the lower limit of the preset pressure range, the outlet pressure of the compressor 10 is low; when the outlet pressure of the compressor 10 is greater than the upper limit of the preset pressure range, the outlet pressure of the compressor 10 is high. When the outlet pressure is moderate, the opening of the first electronic expansion valve 16 can be controlled according to the suction temperature of the compressor 10, and the second electronic expansion valve 18 can be closed. When the outlet pressure is low, the opening of the second electronic expansion valve 18 is controlled, and the first electronic expansion valve 16 is closed. When the outlet pressure is high, the openings of the first electronic expansion valve 16 and the second electronic expansion valve 18 are controlled, thereby ensuring that the operating pressure of the compressor 10 is maintained within a normal range, so that the compressor 10 operates normally.

[0092] The computer-readable storage medium may be provided in the controller 28 or in other terminals. The controller 28 may communicate with other terminals to obtain corresponding programs.

[0093] It is understood that computer-readable storage media may include: any entity or device capable of carrying a computer program, recording media, USB flash drives, mobile hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution media. A computer program includes computer program code. The computer program code may be in source code form, object code form, an executable file, or some intermediate form. Computer-readable storage media may include: any entity or device capable of carrying a computer program code, recording media, USB flash drives, mobile hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution media.

[0094] In certain embodiments of the present invention, the controller 28 may be a single-chip microcomputer that integrates a processor, memory, and a communication module. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), off-the-shelf programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0095] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0096] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by 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 instructions from an instruction execution system, apparatus or device and execute instructions), or used in conjunction with such instruction execution systems, apparatuses or devices.

[0097] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that specific features, structures, materials, or characteristics described in conjunction with an embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative descriptions of these 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 any one or more embodiments or examples.

[0098] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A control method for an air-conditioning device, wherein the air-conditioning device comprises a compressor, a first heat exchanger, and a second heat exchanger connected in sequence, characterized in that: The air conditioning device further includes a first electronic expansion valve and a second electronic expansion valve connected in parallel to a pipeline between the first heat exchanger and the second heat exchanger, wherein the maximum flow rate of the second electronic expansion valve is smaller than the maximum flow rate of the first electronic expansion valve, and the control method includes: Obtaining the outlet pressure of the compressor; When the outlet pressure of the compressor is within a preset pressure range, executing a first control mode, the first control mode comprising: controlling the opening of the first electronic expansion valve according to the suction temperature of the compressor, and closing the second electronic expansion valve; When the outlet pressure of the compressor is less than the lower limit of the preset pressure range, executing a second control mode, the second control mode comprising: controlling the opening of the second electronic expansion valve according to the suction temperature of the compressor, and closing the first electronic expansion valve; When the outlet pressure of the compressor is greater than the upper limit of the preset pressure range, a third control mode is executed. The third control mode includes: controlling the opening of the first electronic expansion valve according to the suction temperature of the compressor, and controlling the second electronic expansion valve to be at a preset opening.

2. The control method according to claim 1, characterized in that: The preset opening is the maximum opening of the second electronic expansion valve.

3. The control method according to claim 1, wherein: The first control mode is executed when the outlet pressure of the compressor changes from less than the lower limit of the preset pressure range to greater than a first set value, and the first set value is greater than the lower limit of the preset pressure range and less than the upper limit of the preset pressure range.

4. The control method according to claim 3, characterized in that: When the outlet pressure of the compressor changes from greater than the upper limit of the preset pressure range to less than a second set value, the first control mode is executed, the second set value is greater than the lower limit of the preset pressure range and less than the upper limit of the preset pressure range, and the second set value is greater than the first set value.

5. The control method according to claim 1, characterized in that: The suction temperature of the compressor is negatively correlated with the opening of the first electronic expansion valve; The suction temperature of the compressor is negatively correlated with the opening degree of the second electronic expansion valve.

6. The control method according to claim 1, characterized in that: The suction temperature ranges from 10°C to 14°C.

7. The control method according to claim 1, characterized in that: In the first control mode and the third control mode, the opening adjustment range of the first electronic expansion valve is 80° to 480°; In the second control mode, the opening adjustment range of the second electronic expansion valve is 80° to 480°.

8. An air conditioning device, characterized in that: The system includes a controller, a compressor, a first heat exchanger, a second heat exchanger, a first electronic expansion valve, and a second electronic expansion valve. The compressor, the first heat exchanger, and the second heat exchanger are sequentially connected to form a circulation loop. The first electronic expansion valve and the second electronic expansion valve are connected in parallel to a pipeline between the first heat exchanger and the second heat exchanger. The maximum flow rate of the second electronic expansion valve is smaller than the maximum flow rate of the first electronic expansion valve. The controller is electrically connected to the compressor, the first electronic expansion valve, and the second electronic expansion valve. The controller is used to: Obtaining the outlet pressure of the compressor; When the outlet pressure of the compressor is within a preset pressure range, executing a first control mode, the first control mode comprising: controlling the opening of the first electronic expansion valve according to the suction temperature of the compressor, and closing the second electronic expansion valve; When the outlet pressure of the compressor is less than the lower limit of the preset pressure range, executing a second control mode, the second control mode comprising: controlling the opening of the second electronic expansion valve according to the suction temperature of the compressor, and closing the first electronic expansion valve; When the outlet pressure of the compressor is greater than the upper limit of the preset pressure range, a third control mode is executed. The third control mode includes: controlling the opening of the first electronic expansion valve according to the suction temperature of the compressor, and controlling the second electronic expansion valve to be at a preset opening.

9. The air conditioning device according to claim 8, characterized in that The preset opening is the maximum opening of the second electronic expansion valve.

10. The air conditioning device according to claim 8, characterized in that The first control mode is executed when the outlet pressure of the compressor changes from less than the lower limit of the preset pressure range to greater than a first set value, and the first set value is greater than the lower limit of the preset pressure range and less than the upper limit of the preset pressure range.

11. The air conditioning device according to claim 10, characterized in that When the outlet pressure of the compressor changes from greater than the upper limit of the preset pressure range to less than a second set value, the first control mode is executed, the second set value is greater than the lower limit of the preset pressure range and less than the upper limit of the preset pressure range, and the second set value is greater than the first set value.

12. An air conditioning device, characterized in that: The invention comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the control method according to any one of claims 1 to 7 are implemented.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the control method according to any one of claims 1 to 7 are implemented.

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