Control method, air conditioning system and computer readable storage medium

Abstract

This invention discloses a control method, an air conditioning system, and a computer-readable storage medium. The air conditioning system includes a compressor, an indoor heat exchanger, a first valve, and a second valve. The indoor heat exchanger includes a first part and a second part. The first valve connects the first part and the compressor. The second valve connects the second part and the compressor. The control method includes controlling the first valve to close and the second valve to open when the compressor inlet pressure is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature. When the compressor inlet pressure is less than a second preset value, the first valve and the second valve are both opened. When the compressor outlet pressure is greater than a third preset value, the first valve and the second valve are both opened. When the compressor outlet pressure is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the first valve is opened and the second valve is opened to a preset opening degree.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a control method, an air conditioning system, and a computer-readable storage medium. Background Technology

[0002] With increasing societal demand for fresh air, direct expansion chillers (direct evaporation air conditioning units) are gaining more attention and being planned for use in air conditioning system design. Direct expansion chillers are designed for a wide range of inlet air temperatures, but during operation, the actual temperature often far exceeds the design value. This causes the compressor in the air conditioning system to operate under overload conditions, affecting compressor safety and reducing the reliability of the air conditioning system. Summary of the Invention

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

[0004] An embodiment of the present invention provides a control method for an air conditioning system, the air conditioning system including a compressor, an indoor heat exchanger, a first valve, and a second valve, the indoor heat exchanger including a first part and a second part, the first valve connecting the first part and the compressor, and the second valve connecting the second part and the compressor, the control method including:

[0005] When the compressor inlet pressure is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the first valve is controlled to close and the second valve is controlled to open.

[0006] When the inlet pressure of the compressor is less than a second preset value, the first valve is controlled to open, and the second valve is controlled to open.

[0007] When the outlet pressure of the compressor is greater than a third preset value, the first valve is controlled to open, and the second valve is controlled to open.

[0008] When the compressor outlet pressure is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the first valve is controlled to open and the second valve is controlled to open to a preset degree. The first preset value is greater than the second preset value, the third preset value is greater than the fourth preset value, and the first preset temperature is greater than the second preset temperature.

[0009] In the above control method, when the compressor inlet pressure is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, the air conditioning system can control the first valve to close and the second valve to open. When the compressor outlet pressure is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, the air conditioning system can control the first valve to open and the second valve to open to a preset degree. When the compressor inlet pressure is less than the second preset value or the compressor outlet pressure is greater than the third preset value, the air conditioning system can control the first valve to open and the second valve to open. This can adjust the heat exchange capacity of the indoor heat exchanger, thereby controlling the compressor to operate in a normal state, ensuring the safe operation of the compressor, and improving the reliability of the air conditioning system.

[0010] In some implementations, the range of the first preset value is [1.8MPa, 2.0MPa], and the range of the second preset value is [1.2MPa, 1.5MPa].

[0011] In some implementations, the third preset value is in the range of [1.8MPa, 2.0MPa], and the fourth preset value is in the range of [1.2MPa, 1.5MPa].

[0012] In some implementations, the preset opening value range is [60p, 120p].

[0013] In some embodiments, the air conditioning system has a cooling mode and a heating mode, a temperature difference exists between the set temperature of the indoor heat exchanger and the return air temperature of the indoor heat exchanger, and the control method includes:

[0014] When the cooling mode is in effect and the temperature difference is within the first temperature difference range, the first valve is controlled to close, and the second valve is controlled to open.

[0015] When the heating mode is in effect and the temperature difference is within the second temperature difference range, the first valve is controlled to open, and the second valve is controlled to open to the preset opening degree.

[0016] In some embodiments, the control method includes:

[0017] When the cooling mode is in effect and the temperature difference is outside the first temperature difference range, the first valve is controlled to open, and the second valve is controlled to open.

[0018] When the heating mode is in effect and the temperature difference is outside the second temperature difference range, the first valve is controlled to open, and the second valve is controlled to open.

[0019] In some embodiments, the temperature difference has a temperature difference coefficient that is positively correlated with the output load of the compressor.

[0020] An air conditioning system according to an embodiment of the present invention includes a compressor, an indoor heat exchanger, a first valve, and a second valve. The compressor is connected to the indoor heat exchanger, which includes a first part and a second part. The first valve connects the first part and the compressor, and the second valve connects the second part and the compressor. The air conditioning system further includes a control module electrically connected to the compressor, the first valve, and the second valve. The control module is used for:

[0021] When the compressor inlet pressure is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the first valve is controlled to close and the second valve is controlled to open.

[0022] When the inlet pressure of the compressor is less than a second preset value, the first valve is controlled to open, and the second valve is controlled to open.

[0023] When the outlet pressure of the compressor is greater than a third preset value, the first valve is controlled to open, and the second valve is controlled to open.

[0024] When the compressor outlet pressure is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the first valve is controlled to open and the second valve is controlled to open to a preset degree. The first preset value is greater than the second preset value, the third preset value is greater than the fourth preset value, and the first preset temperature is greater than the second preset temperature.

[0025] In the aforementioned air conditioning system, when the compressor inlet pressure is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, the air conditioning system can control the first valve to close and the second valve to open. When the compressor outlet pressure is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, the air conditioning system can control the first valve to open and the second valve to open to a preset degree. When the compressor inlet pressure is less than the second preset value or the compressor outlet pressure is greater than the third preset value, the air conditioning system can control the first valve to open and the second valve to open. This allows for adjustment of the heat exchange capacity of the indoor heat exchanger, thereby controlling the compressor to operate in a normal state, ensuring the compressor's operational safety, and improving the reliability of the air conditioning system.

[0026] An air conditioning system according to an embodiment of the present invention includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the steps of the control method described in any of the above embodiments.

[0027] In the aforementioned air conditioning system, when the compressor inlet pressure is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, the air conditioning system can control the first valve to close and the second valve to open. When the compressor outlet pressure is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, the air conditioning system can control the first valve to open and the second valve to open to a preset degree. When the compressor inlet pressure is less than the second preset value or the compressor outlet pressure is greater than the third preset value, the air conditioning system can control the first valve to open and the second valve to open. This allows for adjustment of the heat exchange capacity of the indoor heat exchanger, thereby controlling the compressor to operate in a normal state, ensuring the compressor's operational safety, and improving the reliability of the air conditioning system.

[0028] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the control method described in any of the above embodiments.

[0029] In the aforementioned computer-readable storage medium, when the compressor inlet pressure is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the air conditioning system can control the first valve to close and the second valve to open. When the compressor outlet pressure is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the air conditioning system can control the first valve to open and the second valve to open to a preset degree. When the compressor inlet pressure is less than a second preset value or the compressor outlet pressure is greater than a third preset value, the air conditioning system can control the first valve to open and the second valve to open, thereby adjusting the heat exchange capacity of the indoor heat exchanger, thereby controlling the compressor to operate in a normal state, ensuring the safe operation of the compressor, and improving the reliability of the air conditioning system.

[0030] 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

[0031] 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:

[0032] Figure 1 This is a flowchart of the control method according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the piping connection of an air conditioning system according to an embodiment of the present invention;

[0034] Figure 3 This is a partial pipeline connection diagram of an air conditioning system according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the air conditioning system according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of another module of the air conditioning system according to an embodiment of the present invention.

[0037] Figure label:

[0038] 100. Air conditioning system; 10. Compressor; 12. Outlet; 14. Inlet; 16. Indoor heat exchanger; 18. First part; 20. Second part; 22. Control valve unit; 24. First valve; 26. Second valve; 28. Refrigerant piping; 30. First distributor pipe; 32. Second distributor pipe; 34. High pressure sensor; 36. Low pressure sensor; 38. Ambient temperature sensor; 39. Return air temperature sensor; 40. Outdoor heat exchanger; 42. Control module; 44. Oil separator; 46. Gas-liquid separator; 48. Four-way valve; 50. Electronic expansion valve unit; 52. Indoor fan; 54. Outdoor fan; 56. Delivery pipe; 58. Memory; 60. Processor. Detailed Implementation

[0039] 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.

[0040] 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, are based on the orientations or positional relationships shown in the accompanying drawings and 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. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0042] 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.

[0043] This 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 herein. 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.

[0044] Please refer to Figure 1 , Figure 2 and Figure 3 An embodiment of the present invention provides a control method for an air conditioning system 100. The air conditioning system 100 includes a compressor 10, an indoor heat exchanger 16, a first valve 24, and a second valve 26. The indoor heat exchanger 16 includes a first portion 18 and a second portion 20. The first valve 24 connects the first portion 18 and the compressor 10. The second valve 26 connects the second portion 20 and the compressor 10. The control method includes:

[0045] Step 001: When the inlet pressure of compressor 10 is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, control the first valve 24 to close and control the second valve 26 to open.

[0046] Step 002: When the inlet pressure of compressor 10 is less than the second preset value, control the first valve 24 to open and control the second valve 26 to open;

[0047] Step 003: When the outlet pressure of compressor 10 is greater than the third preset value, control the first valve 24 to open and control the second valve 26 to open;

[0048] Step 004: When the outlet pressure of compressor 10 is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, control the first valve 24 to open and control the second valve 26 to open to the preset degree. The first preset value is greater than the second preset value, the third preset value is greater than the fourth preset value, and the first preset temperature is greater than the second preset temperature.

[0049] In the above control method, when the inlet pressure of the compressor 10 is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, the air conditioning system 100 can control the first valve 24 to close and the second valve 26 to open. When the outlet pressure of the compressor 10 is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open to a preset degree. When the inlet pressure of the compressor 10 is less than the second preset value or the outlet pressure of the compressor 10 is greater than the third preset value, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open, thereby adjusting the heat exchange capacity of the indoor heat exchanger 16, thereby controlling the compressor 10 to operate in a normal state, ensuring the safe operation of the compressor 10, and improving the reliability of the air conditioning system 100.

[0050] Specifically, in Figure 2 In the illustrated embodiment, the air conditioning system 100 includes a refrigerant line 28. The compressor 10 is connected to the indoor heat exchanger 16 via the refrigerant line 28. A first valve 24 includes an electronic expansion valve or a solenoid valve. A second valve 26 includes an electronic expansion valve. The first valve 24 and the second valve 26 are connected in parallel between the compressor 10 and the indoor heat exchanger 16 via the refrigerant line 28. Figure 3The air conditioning system 100 also includes a first distribution pipe 30 and a second distribution pipe 32. The compressor 10 can be connected to a first valve 24 and a second valve 26. The first valve 24 can be connected to a first section 18 via the first distribution pipe 30. The second valve 26 can be connected to a second section 20 via the second distribution pipe 32. The first valve 24 can be used to control the opening or closing of the first section 18 of the indoor heat exchanger 16. The second valve 26 can be used to control the opening or closing of the second section 20 of the indoor heat exchanger 16. The air conditioning system 100 also includes a high-pressure sensor 34 and a low-pressure sensor 36. The compressor 10 may have an outlet 12 and an inlet 14. The high-pressure sensor 34 can be connected near the outlet 12 and can be used to detect the outlet pressure of the outlet 12. The low-pressure sensor 36 can be connected near the inlet 14 and can be used to detect the inlet pressure of the inlet 14.

[0051] The air conditioning system 100 may include an ambient temperature sensor 38. The ambient temperature sensor 38 can detect the temperature of the outdoor environment. The air conditioning system 100 can acquire the inlet pressure of the compressor 10 and the outdoor temperature. In one embodiment, the air conditioning system 100 can operate in cooling mode, and when the inlet pressure of the compressor 10 is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to the first preset temperature, the air conditioning system 100 can control the first valve 24 to close and the second valve 26 to open. In one embodiment, the air conditioning system 100 can operate in cooling mode, and when the inlet pressure of the compressor 10 is less than a second preset value, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open. In one embodiment, the air conditioning system 100 can operate in heating mode, and when the outlet pressure of the compressor 10 is greater than a third preset value, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open. In one embodiment, the air conditioning system 100 can operate in heating mode. When the outlet pressure of the compressor 10 is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the air conditioning system 100 can control the first valve 24 to open and control the second valve 26 to open to a preset degree. In other words, when the inlet pressure of the compressor 10 is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, the air conditioning system 100 can control the first valve 24 to close and the second valve 26 to open. When the outlet pressure of the compressor 10 is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open to a preset degree. When the inlet pressure of the compressor 10 is less than the second preset value or the outlet pressure of the compressor 10 is greater than the third preset value, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open. Thus, by controlling the opening or closing of the first valve 24, the opening degree of the second valve 26 can be controlled, thereby adjusting the heat exchange capacity of the adjustable indoor heat exchanger 16, effectively reducing the evaporation pressure and increasing the condensation pressure. This allows the compressor 10 to operate in a normal state, ensuring the safe operation of the compressor 10 and improving the reliability of the air conditioning system 100.

[0052] In addition, Figure 2 In this system, the air conditioning system 100 may include a control valve unit 22. The control valve unit 22 may include a first valve 24 and a second valve 26. The first preset temperature may be set to 43℃, and the second preset temperature may be set to -5℃, or may be set according to specific circumstances, without specific limitations here.

[0053] It should be noted that "opening the first valve 24" means that the first valve 24 is fully open. "Opening the second valve 26" means that the second valve 26 is performing normal flow regulation. Flow regulation means that the flow rate can be reasonably increased or decreased based on relevant parameters within the air conditioning system 100. It should be noted that the inlet pressure of the compressor 10 must be greater than or equal to the first preset value and less than the second preset value, and the outlet pressure of the compressor 10 must be greater than the third preset value and less than or equal to the fourth preset value, for a duration that can be 5 to 10 minutes. Furthermore, after the second valve 26 is opened to the preset opening degree, it can automatically adjust according to the flow rate.

[0054] In some implementations, the first preset value is in the range of [1.8 MPa, 2.0 MPa]. The second preset value is in the range of [1.2 MPa, 1.5 MPa].

[0055] In this way, the inlet pressure of compressor 10 can be controlled within the normal range, avoiding overload operation of compressor 10 and ensuring the safe operation of compressor 10.

[0056] Specifically, in one embodiment, the first preset value can be selected between 1.8 MPa and 2.0 MPa, and the second preset value can be selected between 1.2 MPa and 1.5 MPa, thereby ensuring that the inlet pressure of the compressor 10 is within the normal range, preventing the compressor 10 from operating under overload conditions, and ensuring the safe operation of the compressor 10. MPa can be megapascal, which is a unit of pressure.

[0057] The first preset value can be 1.8MPa, 1.9MPa, 2.0MPa, or other values ​​between 1.8MPa and 2.0MPa. The second preset value can be 1.2MPa, 1.3MPa, 1.4MPa, 1.5MPa, or other values ​​between 1.2MPa and 1.5MPa.

[0058] In addition, selecting the first preset value outside of 1.8MPa to 2.0MPa and the second preset value outside of 1.2MPa to 1.5MPa may pose a risk of overloading the compressor 10, causing the compressor 10 to malfunction and shortening its service life.

[0059] In some implementations, the third preset value ranges from [1.8 MPa to 2.0 MPa]. The fourth preset value ranges from [1.2 MPa to 1.5 MPa].

[0060] In this way, the outlet pressure of compressor 10 can be controlled within the normal range, avoiding overload operation of compressor 10 and ensuring the safe operation of compressor 10.

[0061] Specifically, in one embodiment, the third preset value can be selected between 1.8MPa and 2.0MPa, and the fourth preset value can be selected between 1.2MPa and 1.5MPa, so that the outlet pressure of the compressor 10 is within the normal range, avoiding the compressor 10 from operating under overload and ensuring the safe operation of the compressor 10.

[0062] The third preset value can be 1.8MPa, 1.9MPa, 2.0MPa, or other values ​​between 1.8MPa and 2.0MPa. The fourth preset value can be 1.2MPa, 1.3MPa, 1.4MPa, 1.5MPa, or other values ​​between 1.2MPa and 1.5MPa.

[0063] In addition, selecting the third preset value outside of 1.8MPa to 2.0MPa and the fourth preset value outside of 1.2MPa to 1.5MPa may pose a risk of overloading the compressor 10, causing the compressor 10 to malfunction and shortening its service life.

[0064] In some implementations, the preset aperture value range is [60p, 120p].

[0065] This reduces heat dissipation from the second part 20 of the indoor heat exchanger 16, increases condensing pressure, and ensures the safe operation of the compressor 10.

[0066] Specifically, in one embodiment, when the outlet pressure of compressor 10 is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open to a preset opening degree, which can be selected between 60p and 120p. This reduces the heat dissipation of the second part 20 of the indoor heat exchanger 16, increases the condensing pressure, and ensures the safe operation of compressor 10. p can be a unit of opening degree.

[0067] In one implementation, the preset aperture value can be 60p, 65p, 70p, 75p, 80p, 85p, 90p, 95p, 100p, 105p, 110p, 115p, 120p, and other values ​​between 60p and 120p.

[0068] Please combine Figure 1In some embodiments, the air conditioning system 100 has a cooling mode and a heating mode. A temperature difference exists between the set temperature of the indoor heat exchanger 16 and the return air temperature of the indoor heat exchanger 16. The control method includes: in cooling mode and when the temperature difference is within a first temperature difference range, controlling the first valve 24 to close and controlling the second valve 26 to open. In heating mode and when the temperature difference is within a second temperature difference range, controlling the first valve 24 to open and controlling the second valve 26 to open to a preset degree.

[0069] Thus, by properly closing the first valve 24 in cooling mode and properly reducing the opening of the second valve 26 in cooling mode, the output load of the compressor 10 can be reduced, thereby achieving energy saving.

[0070] Specifically, the temperature difference can be obtained using the following formula:

[0071] ΔT = TS - TH,

[0072] Where ΔT represents the temperature difference, TS represents the set temperature of the indoor heat exchanger 16, and TH represents the return air temperature of the indoor heat exchanger 16. The unit of temperature difference can be degrees Celsius.

[0073] The air conditioning system 100 may include a return air temperature sensor 39, which may be located on one side of the indoor heat exchanger 16. The air conditioning system 100 can obtain the return air temperature of the indoor heat exchanger 16 through the return air temperature sensor 39. In one embodiment, when in cooling mode and the temperature difference is within a first temperature difference range, the air conditioning system 100 can control the first valve 24 to close and control the second valve 26 to open, thereby regulating the flow rate of the second valve 26 normally. In one embodiment, when in heating mode and the temperature difference is within a second temperature difference range, the air conditioning system 100 can control the first valve 24 to open and control the second valve 26 to open to a preset degree. By appropriately closing the first valve 24 in cooling mode and appropriately reducing the opening degree of the second valve 26 in cooling mode, the output load of the compressor 10 can be reduced, thereby achieving energy saving. In addition, the first temperature difference range may be -1.5℃≤△T≤0℃, and the second temperature difference range may be 0℃≤△T≤2℃.

[0074] In some embodiments, the control method includes: controlling the first valve 24 to open and the second valve 26 to open when in cooling mode and the temperature difference is outside a first temperature difference range; and controlling the first valve 24 to open and the second valve 26 to open when in heating mode and the temperature difference is outside a second temperature difference range.

[0075] This can further improve energy-saving performance.

[0076] Specifically, in one embodiment, when in cooling mode and the temperature difference is outside the first temperature difference range, the air conditioning system 100 can control the opening of the first valve 24 and the second valve 26, thereby regulating the flow of the first valve 24 and the second valve 26 normally. In another embodiment, when in heating mode and the temperature difference is outside the second temperature difference range, controlling the opening of the first valve 24 and the second valve 26, thereby regulating the flow of the first valve 24 and the second valve 26 normally, further improves energy-saving performance.

[0077] In some implementations, the temperature difference has a temperature difference coefficient. The temperature difference coefficient is positively correlated with the output load of the compressor 10.

[0078] In this way, the output load of compressor 10 can be determined by the temperature difference coefficient, thereby reducing the output load of compressor 10 and improving energy efficiency.

[0079] Specifically, in cooling mode, the relationship between temperature difference and temperature difference coefficient can be shown in Table 1 below:

[0080]

[0081] Table 1

[0082] In heating mode, the relationship between temperature difference and temperature difference coefficient can be shown in Table 2 below:

[0083]

[0084] Table 2

[0085] As shown in Table 1, in cooling mode, the temperature difference coefficient decreases as the temperature difference decreases. As shown in Table 2, in heating mode, the temperature difference coefficient decreases as the temperature difference decreases. In one embodiment, the temperature difference coefficient may be positively correlated with the output load of compressor 10. The output load of compressor 10 may decrease as the temperature difference coefficient decreases. That is, a smaller temperature difference indicates lower current demand. By appropriately closing or reducing the first part 18 or the second part 20 of the indoor heat exchanger 16, the output load of compressor 10 can be reduced, thereby enabling the air conditioning system 100 to achieve energy-saving effects in both cooling and heating modes.

[0086] Please refer to Figure 2 , Figure 3 and Figure 4An air conditioning system 100 according to an embodiment of the present invention includes a compressor 10, an indoor heat exchanger 16, a first valve 24, and a second valve 26. The compressor 10 is connected to the indoor heat exchanger 16. The indoor heat exchanger 16 includes a first portion 18 and a second portion 20. The first valve 24 connects the first portion 18 and the compressor 10. The second valve 26 connects the second portion 20 and the compressor 10. The air conditioning system 100 also includes a control module 42. The control module 42 is electrically connected to the compressor 10, the first valve 24, and the second valve 26. The control module 42 is used for:

[0087] When the inlet pressure of compressor 10 is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, control the first valve 24 to close and control the second valve 26 to open.

[0088] When the inlet pressure of compressor 10 is less than the second preset value, control the first valve 24 to open and control the second valve 26 to open.

[0089] When the outlet pressure of compressor 10 is greater than the third preset value, control the first valve 24 to open and control the second valve 26 to open.

[0090] When the outlet pressure of compressor 10 is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, control the first valve 24 to open and control the second valve 26 to open to a preset degree. The first preset value is greater than the second preset value, the third preset value is greater than the fourth preset value, and the first preset temperature is greater than the second preset temperature.

[0091] In the aforementioned air conditioning system 100, when the inlet pressure of the compressor 10 is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the air conditioning system 100 can control the first valve 24 to close and the second valve 26 to open. When the outlet pressure of the compressor 10 is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to a preset opening degree. When the inlet pressure of the compressor 10 is less than a second preset value or the outlet pressure of the compressor 10 is greater than a third preset value, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open, thereby adjusting the heat exchange capacity of the indoor heat exchanger 16, thus controlling the compressor 10 to operate in a normal state, ensuring the safe operation of the compressor 10, and improving the reliability of the air conditioning system 100.

[0092] Specifically, in one embodiment, the air conditioning system 100 can operate in cooling mode. When the inlet pressure of the compressor 10 is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the control module 42 can control the first valve 24 to close and the second valve 26 to open. In one embodiment, the air conditioning system 100 can operate in cooling mode. When the inlet pressure of the compressor 10 is less than a second preset value, the control module 42 can control the first valve 24 to open and the second valve 26 to open. In one embodiment, the air conditioning system 100 can operate in heating mode. When the outlet pressure of the compressor 10 is greater than a third preset value, the control module 42 can control the first valve 24 to open and the second valve 26 to open. In one embodiment, the air conditioning system 100 can operate in heating mode. When the outlet pressure of the compressor 10 is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the control module 42 can control the first valve 24 to open and the second valve 26 to open to a preset degree.

[0093] In addition, Figure 2 In the illustrated embodiment, the air conditioning system 100 further includes an outdoor heat exchanger 40, an oil separator 44, a gas-liquid separator 46, and a four-way valve 48. The compressor 10, indoor heat exchanger 16, and outdoor heat exchanger 40 can be interconnected to form a circulation loop. The four-way valve 48 can be connected to the oil separator 44 and the gas-liquid separator 46 via refrigerant piping 28. The oil separator 44 can be connected near the outlet 12 and can be used to separate lubricating oil from the high-pressure steam discharged from the compressor 10 to ensure the safe and efficient operation of the air conditioning system 100. The gas-liquid separator 46 can be connected near the inlet 14. The air conditioning system 100 also includes an electronic expansion valve unit 50, an indoor fan 52, and an outdoor fan 54. The electronic expansion valve unit 50 is connected near one end of the outdoor heat exchanger 40. The outdoor fan 54 is located on one side of the outdoor heat exchanger 40. The indoor fan 52 is located on one side of the indoor heat exchanger 16. The air conditioning system 100 also includes a delivery pipe 56. The refrigerant in the air conditioning system 100 can enter the first part 18 and the second part 20 of the indoor heat exchanger 16 through the first distribution pipe 30 and the second distribution pipe 32, respectively. After heat exchange in the indoor heat exchanger 16, the refrigerant can be output through the delivery pipe 56 connected to other components.

[0094] Please refer to Figure 5 An air conditioning system 100 according to an embodiment of the present invention includes a memory 58 and a processor 60. The memory 58 stores a computer program. When the processor 60 executes the computer program, it implements the steps of the control method of any of the above embodiments.

[0095] For example, when a computer program is executed, the following steps can be achieved:

[0096] Step 001: When the inlet pressure of compressor 10 is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, control the first valve 24 to close and control the second valve 26 to open.

[0097] Step 002: When the inlet pressure of compressor 10 is less than the second preset value, control the first valve 24 to open and control the second valve 26 to open;

[0098] Step 003: When the outlet pressure of compressor 10 is greater than the third preset value, control the first valve 24 to open and control the second valve 26 to open;

[0099] Step 004: When the outlet pressure of compressor 10 is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, control the first valve 24 to open and control the second valve 26 to open to the preset degree. The first preset value is greater than the second preset value, the third preset value is greater than the fourth preset value, and the first preset temperature is greater than the second preset temperature.

[0100] In the aforementioned air conditioning system 100, when the inlet pressure of the compressor 10 is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the air conditioning system 100 can control the first valve 24 to close and the second valve 26 to open. When the outlet pressure of the compressor 10 is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to a preset opening degree. When the inlet pressure of the compressor 10 is less than a second preset value or the outlet pressure of the compressor 10 is greater than a third preset value, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open, thereby adjusting the heat exchange capacity of the indoor heat exchanger 16, thus controlling the compressor 10 to operate in a normal state, ensuring the safe operation of the compressor 10, and improving the reliability of the air conditioning system 100.

[0101] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When executed by a processor 60, the computer program implements the steps of the control method of any of the above embodiments.

[0102] For example, when a computer program is executed, the following steps can be achieved:

[0103] Step 001: When the inlet pressure of compressor 10 is greater than or equal to the first preset value and the outdoor temperature is greater than or equal to the first preset temperature, control the first valve 24 to close and control the second valve 26 to open.

[0104] Step 002: When the inlet pressure of compressor 10 is less than the second preset value, control the first valve 24 to open and control the second valve 26 to open;

[0105] Step 003: When the outlet pressure of compressor 10 is greater than the third preset value, control the first valve 24 to open and control the second valve 26 to open;

[0106] Step 004: When the outlet pressure of compressor 10 is less than or equal to the fourth preset value and the outdoor temperature is less than the second preset temperature, control the first valve 24 to open and control the second valve 26 to open to the preset degree. The first preset value is greater than the second preset value, the third preset value is greater than the fourth preset value, and the first preset temperature is greater than the second preset temperature.

[0107] In the aforementioned computer-readable storage medium, when the inlet pressure of the compressor 10 is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the air conditioning system 100 can control the first valve 24 to close and the second valve 26 to open. When the outlet pressure of the compressor 10 is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open to a preset degree. When the inlet pressure of the compressor 10 is less than a second preset value or the outlet pressure of the compressor 10 is greater than a third preset value, the air conditioning system 100 can control the first valve 24 to open and the second valve 26 to open, thereby adjusting the heat exchange capacity of the indoor heat exchanger 16, thereby controlling the compressor 10 to operate in a normal state, ensuring the safe operation of the compressor 10, and improving the reliability of the air conditioning system 100.

[0108] The computer-readable storage medium can be located in the control module 42 or in other terminals. The control module 42 can communicate with other terminals to obtain the corresponding program.

[0109] It is understood that computer-readable storage media can include: any entity or device capable of carrying computer programs, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution media, etc. Computer programs include computer program code. Computer program code can be in the form of source code, object code, executable files, or certain intermediate forms, etc. Computer-readable storage media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution media.

[0110] In some embodiments of the present invention, the control module 42 may be a microcontroller chip that integrates a processor, memory, communication module, etc. The processor may 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.

[0111] Any process or method description 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 the preferred embodiments of the invention 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 functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0112] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, 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).

[0113] 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 an embodiment or example is included in at least one embodiment or example of the present 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.

[0114] 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 air conditioning system includes a compressor, an indoor heat exchanger, a first valve, and a second valve. The indoor heat exchanger includes a first part and a second part. The first valve connects the first part and the compressor, and the second valve connects the second part and the compressor. The control method includes: When the air conditioning system is in cooling operation, if the compressor inlet pressure is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the first valve is controlled to close and the second valve is controlled to open. When the air conditioning system is in cooling operation, if the inlet pressure of the compressor is less than a second preset value, the first valve is controlled to open, and the second valve is controlled to open. When the air conditioning system is in heating mode, if the outlet pressure of the compressor is greater than a third preset value, the first valve is controlled to open, and the second valve is controlled to open. When the air conditioning system is in heating mode, if the compressor outlet pressure is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the first valve is controlled to open and the second valve is controlled to open to a preset degree. The first preset value is greater than the second preset value, the third preset value is greater than the fourth preset value, and the first preset temperature is greater than the second preset temperature.

2. The control method according to claim 1, characterized in that, The first preset value ranges from [1.8MPa, 2.0MPa] to [1.2MPa, 1.5MPa].

3. The control method according to claim 1, characterized in that, The range of the third preset value is [1.8MPa, 2.0MPa], and the range of the fourth preset value is [1.2MPa, 1.5MPa].

4. The control method according to claim 1, characterized in that, The preset opening value range is [60p, 120p].

5. The control method according to claim 1, characterized in that, The air conditioning system has a cooling mode and a heating mode. There is a temperature difference between the set temperature of the indoor heat exchanger and the return air temperature of the indoor heat exchanger. The control method includes: When the cooling mode is in effect and the temperature difference is within the first temperature difference range, the first valve is controlled to close, and the second valve is controlled to open. When the heating mode is in effect and the temperature difference is within the second temperature difference range, the first valve is controlled to open, and the second valve is controlled to open to the preset opening degree.

6. The control method according to claim 5, characterized in that, The control method includes: When the cooling mode is in effect and the temperature difference is outside the first temperature difference range, the first valve is controlled to open, and the second valve is controlled to open. When the heating mode is in effect and the temperature difference is outside the second temperature difference range, the first valve is controlled to open, and the second valve is controlled to open.

7. The control method according to claim 5, characterized in that, The temperature difference has a temperature difference coefficient, which is positively correlated with the output load of the compressor.

8. An air conditioning system, characterized in that, The system includes a compressor, an indoor heat exchanger, a first valve, and a second valve. The compressor is connected to the indoor heat exchanger, which includes a first part and a second part. The first valve connects the first part and the compressor, and the second valve connects the second part and the compressor. The air conditioning system also includes a control module electrically connected to the compressor, the first valve, and the second valve. The control module is used for: When the air conditioning system is in cooling operation, if the compressor inlet pressure is greater than or equal to a first preset value and the outdoor temperature is greater than or equal to a first preset temperature, the first valve is controlled to close and the second valve is controlled to open. When the air conditioning system is in cooling operation, if the inlet pressure of the compressor is less than a second preset value, the first valve is controlled to open, and the second valve is controlled to open. When the air conditioning system is in heating mode, if the outlet pressure of the compressor is greater than a third preset value, the first valve is controlled to open, and the second valve is controlled to open. When the air conditioning system is in heating mode, if the compressor outlet pressure is less than or equal to a fourth preset value and the outdoor temperature is less than a second preset temperature, the first valve is controlled to open and the second valve is controlled to open to a preset degree. The first preset value is greater than the second preset value, the third preset value is greater than the fourth preset value, and the first preset temperature is greater than the second preset temperature.

9. An air conditioning system, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the control method according to any one of claims 1-7.

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

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