Air conditioning system and control method thereof

Abstract

The embodiment of the invention provides an air conditioning system and a control method thereof, and the air conditioning system comprises a compressor, a reversing valve, an outdoor heat exchanger, an electronic expansion valve, an electric control radiator, a one-way bypass flow path, a capillary throttling flow path, an indoor heat exchanger and an electric appliance box. The reversing valve is connected with an exhaust port of the compressor, an air suction port of the compressor, the outdoor heat exchanger and the indoor heat exchanger, and the outdoor heat exchanger, the electronic expansion valve and the electric control radiator are sequentially connected in series. The one-way bypass flow path and the capillary throttling flow path are connected in parallel and then connected with the electric control radiator and the indoor heat exchanger, the electric control radiator is configured to cool electric devices in the electric appliance box, a one-way valve is arranged on the one-way bypass flow path, and a capillary tube is arranged on the capillary throttling flow path; when the air conditioning system is in a refrigeration mode, the one-way valve is cut off; and when the air conditioning system is in a heating mode, the one-way valve is switched on.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning system and a control method thereof. Background Art

[0002] In the related art, some air conditioners are equipped with an electric control radiator in the refrigerant circuit, and the refrigerant is passed through the electric control radiator to cool down the electrical components in the electrical box. However, when the electric control radiator is used for cooling, condensation is likely to occur in the electrical box, causing the electrical components to be damaged by moisture. Summary of the invention

[0003] The embodiment of the present application provides an air conditioning system and a control method thereof, which can prevent condensation from occurring in an electrical box and ensure the safety of electrical components in the electrical box.

[0004] On the one hand, an embodiment of the present application provides an air-conditioning system, including a compressor, a reversing valve, an outdoor heat exchanger, an electronic expansion valve, an electronically controlled radiator, a one-way bypass flow path, a capillary flow path, an indoor heat exchanger and an electrical box, the reversing valve is respectively connected to the exhaust port of the compressor, the intake port of the compressor, the outdoor heat exchanger and the indoor heat exchanger, the outdoor heat exchanger, the electronic expansion valve and the electronically controlled radiator are connected in series in sequence, the one-way bypass flow path and the capillary flow path are connected in parallel to the electronically controlled radiator and the indoor heat exchanger, the electronically controlled radiator is configured to cool the electrical components in the electrical box, a one-way bypass flow path is provided with a one-way valve, and a capillary tube is provided on the capillary flow path; when the air-conditioning system is in cooling mode, the one-way valve is cut off; when the air-conditioning system is in heating mode, the one-way valve is turned on.

[0005] In some embodiments, the air conditioning system includes a first temperature sensor, which is disposed on a connecting pipeline between the electronic expansion valve and the electronically controlled radiator and is used to detect the temperature of the refrigerant on the connecting pipeline.

[0006] In some embodiments, the air conditioning system includes a second temperature sensor, which is arranged on a connecting pipeline between the electronically controlled radiator and the capillary flow path, and is used to detect the temperature of the refrigerant flowing from the electronically controlled radiator to the capillary flow path.

[0007] In some embodiments, the air conditioning system includes a third temperature sensor, which is disposed in the electrical box and is used to detect the air temperature in the electrical box.

[0008] In some embodiments, the air conditioning system includes a gas-liquid separator, an input end of the gas-liquid separator is connected to the reversing valve, and an outlet end of the gas-liquid separator is connected to the air intake port of the compressor.

[0009] In some embodiments, the electronically controlled radiator includes a refrigerant tube and a radiator body, one end of the refrigerant tube is connected to the electronic expansion valve, and the other end is respectively connected to the one-way valve and the capillary tube; the radiator body is sleeved on the refrigerant tube and extends into the electrical box, and the radiator body abuts against electrical components in the electrical box.

[0010] On the other hand, an embodiment of the present application provides an air-conditioning system control method for controlling the air-conditioning system provided by any of the above embodiments, the air-conditioning system control method comprising: in response to the air-conditioning system being in cooling mode, determining whether the cooling side temperature of the electronically controlled radiator is greater than the condensation temperature in the electrical box; in response to determining that the cooling side temperature of the electronically controlled radiator is less than or equal to the condensation temperature in the electrical box, controlling the electronic expansion valve to operate at a first preset opening; in response to determining that the cooling side temperature of the electronically controlled radiator is greater than the condensation temperature in the electrical box, controlling the electronic expansion valve to operate within a second preset opening range, the first preset opening being greater than or equal to an upper limit value of the second preset opening.

[0011] In some embodiments, before determining whether the cooling side temperature of the electronically controlled radiator is greater than the condensation temperature in the electrical box, the air-conditioning system control method includes: obtaining the detection temperature of the first temperature sensor and a preset temperature difference correction value; summing the detection temperature of the first temperature sensor and the preset temperature difference correction value to determine the cooling side temperature of the electronically controlled radiator.

[0012] In some embodiments, before determining whether the cooling side temperature of the electronically controlled radiator is greater than the condensation temperature in the electrical box, the air-conditioning system control method includes: obtaining the detection temperature and preset humidity of the third temperature sensor; and determining the condensation temperature in the electrical box based on the detection temperature of the third temperature sensor and the preset humidity.

[0013] In some embodiments, the air-conditioning system includes a first temperature sensor and a second temperature sensor, the first temperature sensor is arranged on the connecting pipeline between the electronic expansion valve and the electronically controlled radiator, and is used to detect the temperature of the refrigerant on the connecting pipeline; the second temperature sensor is arranged on the connecting pipeline between the electronically controlled radiator and the capillary flow path, and is used to detect the temperature of the refrigerant flowing from the electronically controlled radiator to the capillary flow path; controlling the electronic expansion valve to operate within a second preset opening range, including: determining the detection temperature difference between the detection temperature of the first temperature sensor and the detection temperature of the second temperature sensor; and determining the opening of the electronic expansion valve within the second preset opening range according to the detection temperature difference and the condensation temperature.

[0014] In the embodiment of the present application, a one-way valve and a capillary tube are arranged in parallel on the electric-controlled radiator and the indoor heat exchanger. The one-way valve is closed when the air-conditioning system is in cooling mode and is opened when the air-conditioning system is in heating mode. In the cooling mode, the throttled refrigerant can be used to cool the electrical components in the electric-controlled radiator, and the capillary tube can be used to throttle the refrigerant after the temperature is increased through the electric-controlled radiator to ensure the heat absorption and evaporation performance of the indoor heat exchanger. In the heating mode, the refrigerant is controlled to flow into the electric-controlled radiator without throttling for cooling, thereby preventing the low-temperature refrigerant from flowing through the electric-controlled radiator and causing condensation and moisture damage to the electrical components, thereby ensuring the safety of the electrical components in the electrical box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a structural diagram of an air conditioning system provided by some embodiments of the present application;

[0017] Figure 2 is a flow path operation structure diagram of an air conditioning system in a cooling mode provided by some embodiments of the present application;

[0018] Figure 3 is a flow path operation structure diagram of an air conditioning system in a heating mode provided by some embodiments of the present application;

[0019] Figure 4 is another structural diagram of an air conditioning system provided by some embodiments of the present application;

[0020] Figure 5 is another structural diagram of an air conditioning system provided in some embodiments of the present application;

[0021] Figure 6 is a flow chart of an air conditioning system control method provided by some embodiments of the present application;

[0022] Figure 7 is a partial flow chart of an air conditioning system control method provided by some embodiments of the present application;

[0023] Figure 8 is another partial flow chart of the air conditioning system control method provided by some embodiments of the present application;

[0024] Fig. 9 is another partial flow chart of the air conditioning system control method provided by some embodiments of the present application;

[0025] Fig.10 This is another partial flow chart of the air conditioning system control method provided in some embodiments of the present application.

[0026] Description of main component symbols:

[0027] 1-air conditioning system, 11-compressor, 12-reversing valve, 13-outdoor heat exchanger, 14-electronic expansion valve, 15-indoor heat exchanger, 16-gas-liquid separator, 20-electrically controlled radiator, 21-refrigerant pipe, 22-radiator body, 30-one-way bypass flow path, 31-one-way valve, 40-capillary flow path, 41-capillary tube, 42-stop valve, 50-electrical box, 61-first temperature sensor, 62-second temperature sensor, 63-third temperature sensor. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0029] In the description of the present application, 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0031] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0032] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0033] like Figure 1 As shown, on the one hand, an embodiment of the present application provides an air-conditioning system 1, which includes a compressor 11, a reversing valve 12, an outdoor heat exchanger 13, an electronic expansion valve 14, an electronically controlled radiator 20, a one-way bypass flow path 30, a capillary flow path 40, an indoor heat exchanger 15 and an electrical box 50, which can avoid condensation in the electrical box 50 and ensure the safety of electrical components in the electrical box 50.

[0034] Here, the compressor 11 is provided with an exhaust port and an air intake port, and the reversing valve 12 is respectively connected to the exhaust port of the compressor 11, the air intake port of the compressor 11, the outdoor heat exchanger 13, and the indoor heat exchanger 15. The outdoor heat exchanger 13, the electronic expansion valve 14, and the electronically controlled radiator 20 are connected in series in sequence, and the one-way bypass flow path 30 and the capillary flow path 40 are connected in parallel to connect the electronically controlled radiator 20 and the indoor heat exchanger 15. The electronically controlled radiator 20 is configured to cool the electrical components in the electrical box 50. A one-way bypass flow path 30 is provided with a one-way valve 31, and a capillary tube 41 is provided on the capillary flow path 40.

[0035] like Figure 2As shown, when the air conditioning system 1 is in cooling mode, the one-way valve 31 is closed. At this time, the refrigerant enters the reversing valve 12 from the exhaust port of the compressor 11, and then flows from the reversing valve 12 through the outdoor heat exchanger 13, the electronic expansion valve 14, the electronically controlled radiator 20, the capillary tube 41 and the indoor heat exchanger 15 in sequence; in this process, the refrigerant exchanges heat with the outdoor air at the outdoor heat exchanger 13, and the electronic expansion valve 14 throttles the refrigerant output from the outdoor heat exchanger 13, and the throttled refrigerant can cool down the electrical components at the electronically controlled radiator 20. Since the air conditioning system 1 is usually used for cooling in hot weather with high outdoor ambient temperature, the temperature of the refrigerant after passing through the outdoor heat exchanger 13 is relatively high, usually higher than the outdoor ambient temperature, and can release heat to the outdoor air. Therefore, the temperature of the refrigerant after throttling by the electronic expansion valve 14 is still relatively high and higher than the condensation temperature in the electrical box 50, but lower than the temperature of the electrical components when powered on. On the one hand, the refrigerant can be used to cool down the electrical components, and on the other hand, condensation can be avoided in the electrical box 50, thereby avoiding damage to the electrical components due to moisture. After the refrigerant flows through the electronically controlled radiator 20, the capillary tube 41 can throttle the refrigerant, so that the refrigerant is throttled and overcooled by the capillary tube 41 and then flows into the indoor heat exchanger 15, thereby improving the heat absorption and evaporation performance of the indoor heat exchanger 15, thereby improving the cooling effect of the air conditioning system 1 on the indoor air.

[0036] like Figure 3 As shown, when the air conditioning system 1 is in the heating mode, the one-way valve 31 is turned on. At this time, the refrigerant enters the reversing valve 12 from the exhaust port of the compressor 11, and then flows from the reversing valve 12 through the indoor heat exchanger 15, the one-way valve 31, the electric control radiator 20, the electronic expansion valve 14 and the outdoor heat exchanger 13 in sequence; in this process, after the refrigerant condenses and releases heat at the indoor heat exchanger 15 to increase the indoor air temperature, it directly enters the electric control radiator 20 through the one-way valve 31 to cool down the electrical components, and does not flow through the capillary tube 41. Since the refrigerant flowing out of the indoor heat exchanger 15 does not need to pass through the capillary tube 41, the refrigerant flows into the electric control radiator 20 without throttling, so that the refrigerant flowing through the electric control radiator 20 does not have a too low temperature, and the low-temperature refrigerant flowing through the electric control radiator 20 is prevented from condensing and being damaged by moisture.

[0037] Compared with the related art, the air conditioning system 1 provided in the embodiment of the present application is provided with a one-way valve 31 and a capillary tube 41 in parallel at the electric control radiator 20 and the indoor heat exchanger 15. The one-way valve 31 is closed when the air conditioning system 1 is in the cooling mode and is open when the air conditioning system 1 is in the heating mode. In the cooling mode, the throttled refrigerant can be used to cool down the electrical components in the electric control radiator 20, and the capillary tube 41 can be used to throttle the refrigerant after the temperature rises at the electric control radiator 20 to ensure the heat absorption and evaporation performance of the indoor heat exchanger 15. In the heating mode, the refrigerant is controlled to flow into the electric control radiator 20 without throttling to cool down, and the low-temperature refrigerant flowing through the electric control radiator 20 is prevented from condensing and being damaged by moisture, thereby ensuring the safety of the electrical components in the electrical box 50. In addition, the cost of the capillary tube 41 is relatively low, which can save the cost of the air conditioning system 1.

[0038] In some embodiments, the air conditioning system 1 may include a first temperature sensor 61. The first temperature sensor 61 is disposed on the connecting pipeline between the electronic expansion valve 14 and the electronically controlled radiator 20, and is used to detect the temperature of the refrigerant on the connecting pipeline. When the air conditioning system 1 is in cooling mode, the refrigerant flows from the electronic expansion valve 14 to the electronically controlled radiator 20; here, the first temperature sensor 61 may be used to detect the temperature of the refrigerant flowing from the electronic expansion valve 14 to the electronically controlled radiator 20.

[0039] like Figure 4 As shown, in some embodiments, the air-conditioning system 1 may include a second temperature sensor 62, which is arranged on the connecting pipeline between the electronically controlled radiator 20 and the capillary flow path 40, and is used to detect the temperature of the refrigerant flowing from the electronically controlled radiator 20 to the capillary flow path 40.

[0040] like Figures 1 to 4 As shown, in some embodiments, the air conditioning system 1 may include a third temperature sensor 63. The third temperature sensor 63 is disposed in the electrical box 50 and is used to detect the air temperature in the electrical box 50.

[0041] In some embodiments, the air conditioning system 1 may include a gas-liquid separator 16. The input end of the gas-liquid separator 16 is connected to the reversing valve 12, and the gas outlet end of the gas-liquid separator 16 is connected to the air intake port of the compressor 11. By arranging the gas-liquid separator 16 between the reversing valve 12 and the air intake port of the compressor 11, the refrigerant in the gas-liquid mixed state can be separated into gas and liquid, so that the liquid refrigerant is separated into the gas-liquid separator 16, and the gaseous refrigerant is output to the air intake port of the compressor 11, thereby avoiding liquid hammer damage to the compressor 11.

[0042] The structure of the electronically controlled radiator 20 can be determined according to actual needs, and the embodiments of the present application do not limit this. In some embodiments, the electronically controlled radiator 20 may include a refrigerant tube 21 and a radiator body 22. One end of the refrigerant tube 21 is connected to the electronic expansion valve 14, and the other end is respectively connected to the one-way valve 31 and the capillary tube 41; the radiator body 22 is sleeved on the refrigerant tube 21 and extends into the electrical box 50, and the radiator body 22 and the electrical components in the electrical box 50 are abutted. When the air-conditioning system 1 is in the cooling mode, the one-way valve 31 is cut off, and the refrigerant flows through the outdoor heat exchanger 13, the electronic expansion valve 14, the refrigerant tube 21, the capillary tube 41 and the indoor heat exchanger 15 in sequence. When the refrigerant flows through the refrigerant tube 21, it exchanges heat with the radiator body 22 and the electrical components in the electrical box 50, thereby achieving a cooling effect on the electrical components; when the air-conditioning system 1 is in the heating mode, the one-way valve 31 is turned on, and the refrigerant flows through the indoor heat exchanger 15, the one-way valve 31 and the capillary tube 41 in sequence. The refrigerant flows into the refrigerant pipe 21, the electronic expansion valve 14 and the outdoor heat exchanger 13, but does not flow through the capillary tube 41. The refrigerant flows into the refrigerant pipe 21 without being throttled, so that the temperature of the refrigerant flowing through the electronically controlled radiator 20 is not too low. The refrigerant with a relatively suitable temperature is used to exchange heat through the radiator body 22 and the electrical components in the electrical box 50 when flowing through the refrigerant pipe 21, so as to avoid condensation and moisture damage to the electrical components caused by the low-temperature refrigerant flowing through the electronically controlled radiator 20.

[0043] like Figure 5 As shown, in some embodiments, the air conditioning system 1 may include a plurality of capillary sub-flow paths 40. The plurality of capillary sub-flow paths 40 are connected in parallel to the electronically controlled radiator 20 and the indoor heat exchanger 15, and each capillary sub-flow path 40 is provided with a capillary tube 41 and a stop valve 42. Here, when the air conditioning system 1 is in the heating mode, the one-way valve 31 is turned on, and the refrigerant does not pass through any capillary sub-flow path 40. When the air conditioning system 1 is in the cooling mode, the one-way valve 31 is turned off; at this time, the number of the capillary sub-flow paths 40 selected to be opened can be determined according to environmental parameters such as the indoor ambient temperature, the set temperature, and the refrigerant outlet temperature of the electronically controlled radiator 20, and the stop valve 42 on the capillary sub-flow path 40 selected to be opened is controlled to be turned on, and the stop valve 42 on the capillary sub-flow path 40 not selected to be opened is controlled to be turned off.

[0044] like Figure 1 and Figure 6 As shown, on the other hand, an embodiment of the present application provides an air-conditioning system control method for controlling the air-conditioning system 1 provided by any of the above embodiments, and the air-conditioning system control method includes S10 to S30.

[0045] S10: In response to the air conditioning system 1 being in cooling mode, determine whether the cooling side temperature of the electric control radiator 20 is greater than the condensation temperature in the electrical box 50. Here, the cooling side of the electric control radiator 20 is located in the electrical box 50, and is used to perform heat exchange cooling on the electrical components in the electrical box 50; in some examples, the electric control radiator 20 may include the above-mentioned refrigerant pipe 21 and the radiator body 22, and the cooling side temperature is the temperature of one side of the radiator body 22 connected to the electrical components. When the cooling side temperature is greater than the condensation temperature in the electrical box 50, the cooling side temperature and the refrigerant temperature in the electric control radiator 20 are high, and there is no risk of condensation and moisture in the electrical box 50 and the electrical components therein; when the cooling side temperature is less than or equal to the condensation temperature in the electrical box 50, the cooling side temperature and the refrigerant temperature in the electric control radiator 20 are low, and there is a risk of condensation and moisture in the electrical box 50 and the electrical components therein.

[0046] S20 : ​​In response to determining that the cooling side temperature of the electronically controlled radiator 20 is less than or equal to the condensation temperature in the electrical box 50 , the electronic expansion valve 14 is controlled to operate at a first preset opening.

[0047] S30: In response to determining that the cooling side temperature of the electronically controlled radiator 20 is greater than the condensation temperature in the electrical box 50, the electronic expansion valve 14 is controlled to be within a second preset opening range.

[0048] Here, the first preset opening is greater than or equal to the upper limit of the second preset opening. The specific value of the first preset opening can be determined according to actual needs, for example, it can be calculated and determined according to experimental data or historical usage data, and the embodiment of the present application does not limit this; illustratively, the first preset opening can be the maximum opening of the air-conditioning system 1. The specific numerical range of the second preset opening range can be determined according to actual needs, for example, it can be calculated and determined according to experimental data or historical usage data, and the embodiment of the present application does not limit this; illustratively, the upper limit of the second preset opening can be the first preset opening, or it can also be a value less than the first preset opening.

[0049] When it is determined that the cooling side temperature of the electric control radiator 20 is less than or equal to the condensation temperature in the electrical box 50, the cooling side temperature and the refrigerant temperature in the electric control radiator 20 are low, and the electrical box 50 and the electrical components therein are at risk of condensation and moisture. At this time, the electronic expansion valve 14 can be controlled to operate at a first preset opening with a larger opening, which can not only ensure the necessary throttling and cooling effect of the electronic expansion valve 14 on the refrigerant, improve the cooling and cooling effect of the refrigerant when flowing through the electric control radiator 20, but also avoid the refrigerant temperature dropping too much after throttling by the electronic expansion valve 14, and ensure that the refrigerant will not cause condensation and moisture in the electrical box 50 and the electrical components therein when flowing through the electric control radiator 20. Exemplarily, the electronic expansion valve 14 can be controlled to operate in an open loop at a first preset opening, that is, other operating parameters such as the operating frequency of the compressor 11 and the speed of the internal and external fans are not intervened and controlled to avoid interference with the anti-condensation effect; and exemplary, other operating parameters such as the operating frequency of the compressor 11 and the speed of the internal and external fans can also be controlled to operate in a closed loop according to the first preset opening.

[0050] When it is determined that the cooling side temperature is greater than the condensation temperature in the electrical box 50, the cooling side temperature and the refrigerant temperature in the electronically controlled radiator 20 are relatively high, and there is no risk of condensation and moisture in the electrical box 50 and the electrical components therein. At this time, the electronic expansion valve 14 can be controlled to operate in an open loop or closed loop within the second preset opening range, allowing the opening of the electronic expansion valve 14 to be adjusted downward to reduce the opening; when the electronic expansion valve 14 is in closed loop operation, the air conditioner can feedback control the operating parameters including the opening of the electronic expansion valve 14 and other operating parameters such as the operating frequency of the compressor 11, the speed of the internal and external fans, etc.

[0051] In some embodiments, the air conditioning system 1 may include the first temperature sensor 61. Figure 7 As shown, before S10, the air conditioning system control method may include S01-S02.

[0052] S01: Acquire the detected temperature of the first temperature sensor 61 and a preset temperature difference correction value.

[0053] Here, since the air conditioning system 1 is in the cooling mode, the detected temperature of the first temperature sensor 61 is the temperature detection value of the refrigerant flowing from the electronic expansion valve 14 to the electronically controlled radiator 20. The preset temperature difference correction value can be pre-set in the air conditioning system 1 to reflect the difference between the refrigerant temperature in the electronically controlled radiator 20 and the temperature on the cooling side. In some examples, the electronically controlled radiator 20 may include the above-mentioned refrigerant pipe 21 and the radiator body 22, and the preset temperature difference correction value may reflect the difference between the refrigerant temperature in the refrigerant pipe 21 and the temperature on one side of the radiator body 22 connected to the electrical device.

[0054] S02: Sum the detected temperature of the first temperature sensor 61 and the preset temperature difference correction value to determine the cooling side temperature of the electronically controlled radiator 20. The cooling side temperature of the electronically controlled radiator 20 can be obtained by summing the detected temperature of the first temperature sensor 61 and the preset temperature difference correction value.

[0055] like Figure 4 As shown, in some embodiments, the air conditioning system 1 may include the first temperature sensor 61 and the second temperature sensor 62. Figure 8 As shown, S30 may include S31-S32.

[0056] S31: Determine the detected temperature difference between the detected temperature of the first temperature sensor 61 and the detected temperature of the second temperature sensor 62. Here, the detected temperature of the first temperature sensor 61 and the detected temperature of the second temperature sensor 62 can be subtracted to obtain the difference, and the difference obtained is used as the detected temperature difference. The detected temperature difference can reflect the temperature change of the refrigerant before and after it flows through the electronically controlled radiator 20, and further reflect the cooling demand for the electrical components in the electrical box 50 when cooling down. When the absolute value of the detected temperature difference is large, it means that the refrigerant presents a large temperature rise after flowing through the electronically controlled radiator 20, and the cooling demand for the electrical components in the electrical box 50 is large; when the absolute value of the detected temperature difference is small, it means that the refrigerant presents a small temperature rise after flowing through the electronically controlled radiator 20, and the cooling demand for the electrical components in the electrical box 50 is small.

[0057] S32: Determine the opening of the electronic expansion valve 14 within the second preset opening range according to the detected temperature difference and the condensation temperature. Here, the electronic expansion valve 14 can be controlled and calculated according to the detected temperature difference and the condensation temperature to determine the opening of the electronic expansion valve 14 within the second preset opening range, so that the opening of the electronic expansion valve 14 can not only better match and meet the cooling demand when cooling the electrical components in the electrical box 50 and achieve a better cooling effect, but also avoid causing the cooling side temperature of the electronically controlled radiator 20 to be less than or equal to the condensation temperature in the electrical box 50 and avoid the risk of condensation. For example, when the absolute value of the detected temperature difference is large, the opening of the electronic expansion valve 14 can be controlled to decrease, and the opening of the electronic expansion valve 14 corresponding to the condensation temperature is used as the lower limit of the opening to enhance the throttling and cooling effect, and further reduce the temperature of the refrigerant after throttling by the electronic expansion valve 14; when the absolute value of the detected temperature difference is small, the opening of the electronic expansion valve 14 can be controlled to increase to reduce the throttling and cooling effect, and further reduce the risk of condensation and moisture in the electrical box 50 and the electrical components therein.

[0058] like Figure 5 As shown, in some embodiments, the air conditioning system 1 may include the above-mentioned plurality of capillary flow paths 40 and a second temperature sensor 62. Fig. 9As shown, in response to the air-conditioning system 1 being in the cooling mode, the air-conditioning system control method may include S40.

[0059] S40: Determine the number of capillary flow paths 40 selected to be opened according to the indoor ambient temperature, the set temperature and the detected temperature of the second temperature sensor 62, and control the shut-off valves 42 on the capillary flow paths 40 selected to be opened to be turned on and control the shut-off valves 42 on the capillary flow paths 40 not selected to be opened to be turned off.

[0060] Here, the indoor environment temperature can be measured by a temperature sensor disposed on the indoor side of the air conditioning system 1, and the indoor side can be, for example, an indoor unit in a split air conditioner, a side structure located indoors in an integrated air conditioner, etc. The set temperature is a target temperature that the indoor environment is expected to reach, which can be set by manual input by the user, or automatically generated by the air conditioning system 1 according to operating conditions such as the user's usage habits, current environmental information, etc., to obtain a comfortable temperature environment.

[0061] By setting S40, a target number of capillary flow paths 40 can be matched and selected to throttle and cool the refrigerant output from the electronically controlled radiator 20, so as to reduce the temperature of the refrigerant to a target area, thereby better ensuring the supercooling degree of the evaporator and the evaporative heat absorption performance.

[0062] like Figures 1 to 5 As shown, in some embodiments, the air conditioning system 1 may include the third temperature sensor 63. Fig.10 As shown, before S10 , the air conditioning system control method may include S01 ′ to S02 ′.

[0063] S01 ′: Acquire the detected temperature and preset humidity of the third temperature sensor 63 .

[0064] Here, the temperature detected by the third temperature sensor 63 is the air temperature in the electrical box 50. The preset humidity can be pre-set in the air conditioning system 1, or can be set according to the actual humidity environment of the air conditioning system 1, to reflect the dangerous humidity at which condensation is likely to occur in the electrical box 50 when the air conditioning system 1 is actually used. For example, the value of the preset humidity can be 70%.

[0065] S02': Determine the condensation temperature in the electrical box 50 according to the detected temperature and preset humidity of the third temperature sensor 63. According to the detected temperature and preset humidity of the third temperature sensor 63, that is, according to the air temperature in the electrical box 50 and the dangerous humidity in the electrical box 50 where condensation is likely to occur, the condensation temperature in the electrical box 50 where condensation is likely to occur can be determined.

[0066] The air-conditioning system and its control method provided in the embodiment of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An air conditioning system, characterized in that: The invention comprises a compressor, a reversing valve, an outdoor heat exchanger, an electronic expansion valve, an electronically controlled radiator, a one-way bypass flow path, a capillary flow path, an indoor heat exchanger and an electrical box, wherein the reversing valve is respectively connected to the exhaust port of the compressor, the air intake port of the compressor, the outdoor heat exchanger and the indoor heat exchanger, the outdoor heat exchanger, the electronic expansion valve and the electronically controlled radiator are sequentially connected in series, the one-way bypass flow path and the capillary flow path are connected in parallel to connect the electronically controlled radiator and the indoor heat exchanger, the electronically controlled radiator is configured to cool the electrical components in the electrical box, the one-way bypass flow path is provided with a one-way valve, and the capillary flow path is provided with a capillary tube; When the air-conditioning system is in a cooling mode, the one-way valve is closed; when the air-conditioning system is in a heating mode, the one-way valve is opened.

2. The air conditioning system according to claim 1, characterized in that: The air conditioning system comprises a first temperature sensor, which is arranged on a connecting pipeline between the electronic expansion valve and the electronically controlled radiator and is used to detect the temperature of the refrigerant on the connecting pipeline.

3. The air conditioning system according to claim 1, characterized in that: The air conditioning system includes a second temperature sensor, which is arranged on a connecting pipeline between the electronically controlled radiator and the capillary flow path and is used to detect the temperature of the refrigerant flowing from the electronically controlled radiator to the capillary flow path.

4. The air conditioning system according to claim 1, characterized in that: The air conditioning system includes a third temperature sensor, which is disposed in the electrical box and is used to detect the air temperature in the electrical box.

5. The air conditioning system according to claim 1, characterized in that: The air conditioning system comprises a gas-liquid separator, an input end of the gas-liquid separator is connected to the reversing valve, and an air outlet end of the gas-liquid separator is connected to an air intake port of the compressor.

6. The air conditioning system according to claim 1, characterized in that: The electronically controlled radiator includes a refrigerant tube and a radiator body. One end of the refrigerant tube is connected to the electronic expansion valve, and the other end is respectively connected to the one-way valve and the capillary tube. The radiator body is sleeved on the refrigerant tube and extends into the electrical box. The radiator body abuts against the electrical components in the electrical box.

7. An air conditioning system control method, used to control the air conditioning system according to any one of claims 1 to 6, characterized in that: The air conditioning system control method comprises: In response to the air conditioning system being in a cooling mode, determining whether a cooling side temperature of the electronically controlled radiator is greater than a condensation temperature in the electrical box; In response to determining that the cooling side temperature of the electronically controlled radiator is less than or equal to the condensation temperature in the electrical box, controlling the electronic expansion valve to operate at a first preset opening; In response to determining that the cooling side temperature of the electronically controlled radiator is greater than the condensation temperature in the electrical box, the electronic expansion valve is controlled to operate within a second preset opening range, and the first preset opening is greater than or equal to an upper limit value of the second preset opening.

8. The air conditioning system control method according to claim 7, characterized in that: The air conditioning system comprises a first temperature sensor, which is arranged on a connecting pipeline between the electronic expansion valve and the electronically controlled radiator and is used to detect the temperature of the refrigerant on the connecting pipeline; Before determining whether the cooling side temperature of the electronically controlled radiator is greater than the condensation temperature in the electrical box, the air conditioning system control method includes: Acquire the detected temperature of the first temperature sensor and a preset temperature difference correction value; The detected temperature of the first temperature sensor and a preset temperature difference correction value are summed to determine the cooling side temperature of the electronically controlled radiator.

9. The air conditioning system control method according to claim 7, characterized in that: The air conditioning system comprises a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is arranged on a connecting pipeline between the electronic expansion valve and the electronically controlled radiator, and is used to detect the temperature of the refrigerant on the connecting pipeline; the second temperature sensor is arranged on a connecting pipeline between the electronically controlled radiator and the capillary flow path, and is used to detect the temperature of the refrigerant flowing from the electronically controlled radiator to the capillary flow path; Controlling the electronic expansion valve to operate within a second preset opening range includes: determining a detected temperature difference between a detected temperature of the first temperature sensor and a detected temperature of the second temperature sensor; The opening degree of the electronic expansion valve is determined within the second preset opening degree range according to the detected temperature difference and the condensation temperature.

10. The air conditioning system control method according to claim 7, characterized in that: The air conditioning system comprises a third temperature sensor, which is arranged in the electrical box and is used to detect the air temperature in the electrical box; Before determining whether the cooling side temperature of the electronically controlled radiator is greater than the condensation temperature in the electrical box, the air conditioning system control method includes: Acquiring the detected temperature and preset humidity of the third temperature sensor; The condensation temperature in the electrical box is determined according to the detected temperature of the third temperature sensor and the preset humidity.

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