A scroll compressor system with adjustable airflow pattern and control method

Abstract

The application provides a scroll compressor system with adjustable air flow mode and a control method, relates to the technical field of compressors, and comprises a compressor, a first adjusting assembly, a second adjusting assembly, a temperature sensing unit and a controller; a lower support assembly comprises a lower support, the lower support is provided with a first fluid flow channel, a second fluid flow channel and a third fluid flow channel which are independent of each other, the controller is electrically connected with the temperature sensing unit and the first adjusting assembly and the second adjusting assembly, and the controller is specifically configured to: calculate a difference signal ΔT=T b -T c of suction gas superheat degree based on a second temperature signal and a third temperature signal; output a control instruction according to a comparison result of a first temperature signal T a , the difference signal ΔT and a preset threshold value; and the control instruction drives the first adjusting assembly and the second adjusting assembly to enter one of multiple air flow modes defined by on-off states of the first fluid flow channel and the second fluid flow channel.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to a scroll compressor system and control method with an adjustable airflow pattern. Background Technology

[0002] Scroll compressors, as core components of high-efficiency refrigeration systems, are widely used in air conditioning, heat pumps, and industrial refrigeration. Under extreme operating conditions, the motor stator of a scroll compressor is prone to severe overheating. As the core power component of the compressor, the insulation materials and windings of the motor stator age rapidly at high temperatures, leading to performance degradation and even short-circuit failures. In special operating environments, the compressor's suction superheat may drop to dangerous levels. Insufficient superheat means that the refrigerant enters the scroll plate in a liquid or gas-liquid mixture, triggering liquid slugging. Liquid refrigerant is incompressible within the compression chamber, resulting in instantaneous high-pressure impacts. Liquid slugging causes cracks or wear on mechanical components, severely affecting the compressor's reliability.

[0003] Therefore, it is essential to propose a scroll compressor system and control method with an adjustable airflow pattern. Summary of the Invention

[0004] To address the aforementioned technical problems of existing scroll compressors under extreme conditions, such as stator overheating leading to insulation aging and short-circuit risks, and insufficient suction superheat causing liquid slugging, both of which threaten their reliability and durability, this invention provides a scroll compressor system and control method with adjustable airflow modes. This invention primarily utilizes a controller to open or close the first and second fluid flow channels based on operating conditions, thereby switching the airflow mode and achieving coordinated and optimized control of motor cooling intensity and suction superheat.

[0005] The technical means employed in this invention are as follows: A scroll compressor system with an adjustable airflow pattern includes: a compressor, a first regulating component, a second regulating component, a temperature sensing unit, and a controller; The compressor has a motor stator and a lower support assembly inside; the lower support assembly includes a lower support, on which a first fluid flow channel, a second fluid flow channel and a third fluid flow channel are opened, and an air intake filter is provided at the third fluid flow channel. The first adjustment component and the second adjustment component are respectively disposed at position H above the first fluid flow channel and the second fluid flow channel, and are used to independently open and close the corresponding fluid flow channels. The temperature sensing unit includes a first temperature acquisition unit, a second temperature acquisition unit, and a third temperature acquisition unit. The first temperature acquisition unit is used to acquire the first temperature signal T of the motor stator. aThe second and third temperature acquisition devices are used to acquire the second temperature signal T at the compressor intake port, respectively. b The third temperature signal T corresponding to the refrigerant saturation temperature at the heat exchanger outlet. c ; The controller is electrically connected to the temperature sensing unit and the first and second adjustment components. The controller performs the following actions: calculating the difference signal ΔT=T of the intake superheat based on the second and third temperature signals. b -T c According to the first temperature signal T a The control command is output based on the comparison result between the difference signal △T and the preset threshold. The control command is used to drive the first adjustment component and the second adjustment component to enter one of the multiple airflow modes defined by the on / off state of the first fluid flow channel and the second fluid flow channel, so as to coordinately adjust the cooling airflow flowing through the motor stator and the intake superheat of the air entering the compression chamber. The controller executes the following control logic: When the first condition is met, both the first and second adjustment components are activated, causing the system to enter the first airflow mode. When the second condition is met, the first regulating component is turned off and the second regulating component is turned on, so that the system enters the second airflow mode. When the third condition is met, both the first and second regulating components are turned off, causing the system to enter the third airflow mode. The first condition is: T a ≤T1 and △T>T5; The second condition is to satisfy any of the following sub-conditions: T1 <T a ≤T2 and △T>T4; △T satisfies T4<△T≤T5 and T a ≤T1; The third condition is that any of the following sub-conditions is satisfied: T2 < T a ≤T3 and △T>0.0001K; 0.0001K<△T≤T4 and T a ≤T2, where K is Kelvin; T1, T2, T3, T4, and T5 are preset thresholds, where T1 < T2 < T3 < T4 < T5.

[0006] Furthermore, the first adjustment component includes a first driver, a first push rod, and a first flow guide cover plate fixed to the end of the first push rod. The first flow guide cover plate is driven by the first driver to perform lifting and lowering movements to seal or open the corresponding first fluid flow channel. The second adjustment component includes a second driver, a second push rod, and a second flow guide cover plate fixed to the end of the second push rod. The second flow guide cover plate is driven by the second driver to move up and down to seal or open the corresponding second fluid flow channel.

[0007] Furthermore, the first, second, and third conditions are based on the first temperature signal T. a The temperature threshold T1 is determined by comparing it with the first preset temperature threshold T1, the second preset temperature threshold T2, and the third preset temperature threshold T3, and by comparing the difference signal ΔT with the fourth preset temperature threshold T4 and the fifth preset temperature threshold T5. <T2<T3,T4<T5。

[0008] Furthermore, position H is located above the lower support assembly and within the inner space of the housing; the first temperature sensor is located at position J, directly opposite the motor stator; the second temperature sensor is located at position K, where the refrigerant flows into the compressor; and the third temperature sensor is located at position L, where the refrigerant flows into the heat exchanger.

[0009] Furthermore, in the first airflow mode, the cooling airflow flows through both the first fluid flow channel and the second fluid flow channel to cool the motor stator; in the second airflow mode, the cooling airflow flows through the second fluid flow channel to cool the motor stator; in the third airflow mode, the cooling airflow does not flow through the first fluid flow channel and the second fluid flow channel.

[0010] The present invention also provides a control method for a scroll compressor system with an adjustable airflow mode, comprising the following steps: Real-time acquisition of the first temperature signal T a Second temperature signal T b and the third temperature signal T c ; Calculate the difference signal ΔT=T of the intake superheat. b -T c The first temperature signal T a The difference signal ΔT is compared with multiple preset thresholds; Based on the comparison results, determine the current target thermal management condition of the system; Based on the target thermal management conditions, the system is switched to an airflow mode that matches the target thermal management conditions.

[0011] Furthermore, determining the current target thermal management condition of the system based on the comparison results includes: When T a When ≤T1 and △T>T5, the system is in a condition where strong cooling is not required and the intake superheat is sufficient; When T1 is satisfied <T a ≤T2 and △T>T4 or T4<△T≤T5 and T a When T1 is less than or equal to 1, the system is in a condition that requires partial cooling and / or adjustment of intake superheat. When T2 < T a ≤T3 and △T>0.0001K or 0.0001K<△T≤T4 and T a When T2 is less than or equal to 2, the system is determined to be in a condition requiring strong cooling. T1, T2, T3, T4, and T5 are preset threshold values.

[0012] Further, the step of switching the system to an airflow mode that matches the target thermal management condition includes: If the system is determined to be in a condition where strong cooling is not required and the intake superheat is sufficient, then the first airflow mode is used; if the system is determined to be in a condition where partial cooling is required and / or the intake superheat needs to be adjusted, then the second airflow mode is used; if the system is determined to be in a condition where strong cooling is required, then the third airflow mode is used.

[0013] Compared with the prior art, the present invention has the following advantages: Temperature acquisition devices are respectively located at the motor stator positive conductor position, the fluid inflow position, and the fluid inflow position. The controller controls two regulating components to open or close the first and second fluid flow channels according to the acquired motor stator temperature Ta and superheat difference ΔT, based on preset complex logic rules, thereby switching the airflow mode and realizing coordinated optimization control of motor cooling intensity and suction superheat. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the system structure in an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the adjustment component structure in an embodiment of the present invention.

[0017] Figure 3 This is a diagram showing three working states of the adjustment component in an embodiment of the present invention; wherein Figure 3 Figure a shows the first and second fluid flow channels both in the open state. Figure 3b represents a state where the first fluid flow channel is closed and the second fluid flow channel is open. Figure 3 Figure c shows the first and second fluid flow channels both in a closed state.

[0018] Figure 4 This is a schematic diagram of the first airflow mode in an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the third airflow mode in an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the second airflow mode in an embodiment of the present invention.

[0021] In the diagram: 600, lower support assembly; 610, lower support; 611, first fluid flow channel; 612, second fluid flow channel; 613, third fluid flow channel; 620, intake filter; 700, compressor; 701, motor stator; 702, moving scroll; 703, fixed scroll; 704, outer casing; 705, intake pipe; 100, first adjustment assembly; 101, first driver; 102, first push rod; 103, first guide cover; 010, H position; 200, second adjustment assembly; 201, second driver; 202, second push rod; 203, second guide cover; 020, J position; 301, first temperature sensor; 302, second temperature sensor; 030, K position; 303, third temperature sensor; 040, L position; 901, controller. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0026] like Figures 1-5 As shown, a scroll compressor 700 system with an adjustable airflow mode includes: a compressor 700, a first regulating component 100, a second regulating component 200, a temperature sensing unit, and a controller 901. The compressor 700 has a motor stator 701 and a lower support 610 assembly inside; the intake pipe 705 is arranged on the housing 704; The lower support 610 assembly includes a lower support 610, on which are provided independent first fluid flow channels 611, second fluid flow channels 612, and third fluid flow channels 613. An intake filter 620 is provided at the third fluid flow channel 613. The first fluid flow channels 611, second fluid flow channels 612, and third fluid flow channels are separated from each other by the solid wall of the lower support 610 and are not interconnected within the lower support 610, thus forming independent fluid flow paths. The first fluid flow channels 611 and second fluid flow channels 612 are respectively corresponding to the first guide cover 103 and the second guide cover 203, and can be independently opened or closed by the first adjustment component 100 and the second adjustment component 200. The third fluid flow channel 613 is located at the corresponding position of the intake filter 620. The third fluid flow channel 613 is not provided with a guide cover controlled by the first adjustment component 100 or the second adjustment component 200, therefore it remains open in the first airflow mode, the second airflow mode, and the third airflow mode, forming the basic intake channel of the compressor.

[0027] The first adjustment component 100 and the second adjustment component 200 are respectively disposed at position H 010 above the first fluid flow channel 611 and the second fluid flow channel 612, and are used to independently open and close the corresponding fluid flow channels. The temperature sensing unit comprises a first temperature acquisition unit 301, a second temperature acquisition unit 302, and a third temperature acquisition unit 303. The first temperature acquisition unit 301 is used to acquire the first temperature signal T of the motor stator 701.a The second temperature acquisition unit 302 and the third temperature acquisition unit 303 are used to acquire the second temperature signal T at the suction port of the compressor 700, respectively. b The third temperature signal T corresponding to the refrigerant saturation temperature at the heat exchanger outlet. c ; The controller 901 is electrically connected to the temperature sensing unit, the first adjustment component 100, and the second adjustment component 200. The controller 901 is configured to calculate the difference signal ΔT=T of the intake superheat based on the second temperature signal and the third temperature signal. b -T c According to the first temperature signal T a The comparison result of the sum difference signal △T with the preset threshold is used to output a control command. The control command is used to drive the first adjustment component 100 and the second adjustment component 200 into one of the multiple airflow modes defined by the on / off state of the first fluid flow channel 611 and the second fluid flow channel 612, so as to coordinately adjust the cooling airflow flowing through the motor stator 701 and the intake superheat of the air entering the compression chamber.

[0028] The first adjustment component 100 includes a first driver 101, a first push rod 102, and a first guide cover plate 103 fixed at the end of the first push rod 102. The first guide cover plate 103 is driven by the first driver 101 to perform lifting and lowering movements to seal or open the corresponding first fluid flow channel 611. The second adjustment component 200 includes a second driver 201, a second push rod 202, and a second guide cover 203 fixed to the end of the second push rod 202; the second guide cover 203 is driven by the second driver 201 to move up and down to seal or open the corresponding second fluid flow channel 612.

[0029] Controller 901 is specifically configured to execute the following control logic: When the first condition is met, both the first regulating component 100 and the second regulating component 200 are activated, causing the system to enter the first airflow mode. When the second condition is met, the first regulating component 100 is closed and the second regulating component 200 is opened, so that the system enters the second airflow mode. When the third condition is met, both the first regulating component 100 and the second regulating component 200 are turned off, causing the system to enter the third airflow mode. Among them, the first condition, the second condition, and the third condition are based on the first temperature signal T. a The temperature threshold T1 is determined by comparing it with the first preset temperature threshold T1, the second preset temperature threshold T2, and the third preset temperature threshold T3, and by comparing the difference signal ΔT with the fourth preset temperature threshold T4 and the fifth preset temperature threshold T5. <T2<T3,T4<T5。

[0030] The control logic is as follows: The first condition is: T a ≤T1 and △T>T5; The second condition is that any of the following sub-conditions are satisfied: T1 <T a ≤T2 and △T>T4; △T satisfies T4<△T≤T5 and T a ≤T1; The third condition is that any of the following sub-conditions is satisfied: T2 < T a ≤T3 and △T>0.0001K; 0.0001K<△T≤T4 and T a ≤T2, where K is Kelvin.

[0031] Position H 010 is located above the lower support 610 assembly and within the inner space of the housing 704; the first temperature sensor 301 is located at position J 020, directly opposite the motor stator 701; the second temperature sensor 302 is located at position K 030, where the refrigerant flows into the compressor 700; and the third temperature sensor 303 is located at position L 040, where the refrigerant flows into the heat exchanger.

[0032] In the first airflow mode, the cooling airflow flows through the first fluid flow channel 611 and the second fluid flow channel 612 simultaneously to cool the motor stator 701; in the second airflow mode, the cooling airflow flows through the second fluid flow channel 612 to cool the motor stator 701; in the third airflow mode, the cooling airflow does not flow through the first fluid flow channel 611 and the second fluid flow channel 612 at all.

[0033] The first fluid flow channel 611 and the second fluid flow channel 612 are controllable auxiliary flow paths that can be opened and closed by the first regulating component 100 and the second regulating component 200. The third fluid flow channel 613 is a basic suction flow path equipped with a suction filter 620. The third fluid flow channel 613 remains open in all three airflow modes. Therefore, even if the first fluid flow channel 611 and the second fluid flow channel 612 are closed, refrigerant is still supplied to the compressor.

[0034] When the motor stator 701 does not require strong cooling and the suction superheat is sufficient, both the first fluid flow channel 611 and the second fluid flow channel 612 are open. At this time, the system flow area increases, the suction resistance decreases, and the suction flow capacity is improved. Since the motor stator 701 temperature is low and the suction superheat is sufficient at this time, there is no risk of liquid slugging, so both the first fluid flow channel 611 and the second fluid flow channel 612 are allowed to be open. When the motor stator 701 requires strong cooling or the suction superheat is insufficient, the first fluid flow channel 611 and the second fluid flow channel 612 are closed, but the third fluid flow channel 613 remains open. At this time, the refrigerant enters the compressor through the third fluid flow channel 613 and is guided to flow through the area around the motor stator 701, thereby enhancing the heat exchange between the refrigerant and the motor stator 701 and forcibly cooling the motor stator 701; at the same time, after the refrigerant absorbs heat from the motor stator 701 and the compressor, it can increase the suction superheat before entering the compression chamber, thereby reducing the risk of liquid slugging. Therefore, in the third airflow mode of this application, closing the first fluid flow channel 611 and the second fluid flow channel 612 does not stop the supply of refrigerant to the compressor. Instead, by closing the controllable auxiliary flow path, the refrigerant mainly enters and passes through the heat exchange area near the motor stator 701 through the third fluid flow channel 613, which is usually open, so as to achieve coordinated control of motor cooling and suction superheat regulation.

[0035] A control method for a scroll compressor 700 system with an adjustable airflow pattern includes the following steps: Real-time acquisition of the first temperature signal T a Second temperature signal T b and the third temperature signal T c ; Calculate the difference signal ΔT=T of the intake superheat. b -T c The first temperature signal T a The sum and difference signal ΔT are compared with multiple preset thresholds; Based on the comparison results, determine the current target thermal management condition of the system; Based on the target thermal management conditions, switch the system to an airflow mode that matches the target thermal management conditions.

[0036] Based on the comparison results, determine the current target thermal management condition of the system, including: When T a When ≤T1 and △T>T5, the system is in a condition where strong cooling is not required and the intake superheat is sufficient; When T1 is satisfied <T a ≤T2 and △T>T4 or T4<△T≤T5 and T a When T1 is less than or equal to 1, the system is in a condition that requires partial cooling and / or adjustment of intake superheat. When T2 < T a ≤T3 and △T>0.0001K or 0.0001K<△T≤T4 and T a When T2 is less than or equal to 2, the system is considered to be in a cooling condition that needs to be avoided. T1, T2, T3, T4, and T5 are the first, second, third, fourth, and fifth preset thresholds, respectively.

[0037] Based on the target thermal management conditions, the system is switched to an airflow mode that matches the target thermal management conditions, including: If the system is determined to be in a condition where strong cooling is not required and the intake superheat is sufficient, then the first airflow mode is used; if the system is determined to be in a condition where partial cooling is required and / or the intake superheat needs to be adjusted, then the second airflow mode is used; if the system is determined to be in a condition where strong cooling is required, then the third airflow mode is used.

[0038] like Figure 3 As shown in Figure a, during the operation of compressor 700, the first temperature acquisition unit 301 acquires the first temperature signal T. a The second temperature acquisition unit 302 acquires the second temperature signal T. b The third temperature acquisition unit 303 acquires the third temperature signal T. c When Ta ≤ the first preset temperature and the fifth preset temperature < ΔT = T b -T c The motor stator does not require cooling, the intake superheat is sufficient, and the first regulating component 100 and the second regulating component 200 receive the signal from the controller 901 and begin to rise. The first fluid flow channel 611 and the second fluid flow channel 612 are in the open state; the airflow direction is as follows: Figure 4 As shown.

[0039] like Figure 3 c. Figure 5 As shown, during the operation of compressor 700, the first temperature acquisition unit 301 acquires the first temperature signal T. a The second temperature acquisition unit 302 acquires the second temperature signal T. b The third temperature acquisition unit 303 acquires the third temperature signal T. c ; ①Second preset temperature < T a If the temperature is ≤3 preset temperature, the fifth preset temperature <△T, or the fourth preset temperature <△T≤5 preset temperature, or 0.0001K <△T≤4 preset temperature, the motor needs strong cooling, and the intake superheat is slightly or severely insufficient. Or ② When 0.0001K < ΔT ≤ the fourth preset temperature, T a ≤ First preset temperature or first preset temperature < T a ≤Second preset temperature, the intake superheat is severely insufficient, and the motor does not need to be cooled or only slightly cooled; The first regulating component 100 and the second regulating component 200 receive signals from the controller 901 and begin to descend. The first fluid flow channel 611 and the second fluid flow channel 612 are in the closed state; the airflow direction is as follows. Figure 5 As shown.

[0040] like Figure 3 b、 Figure 6 As shown, during the operation of compressor 700, the first temperature acquisition unit 301 acquires the first temperature signal T. a The second temperature acquisition unit 302 acquires the second temperature signal T. b The third temperature acquisition unit 303 acquires the third temperature signal T. c ; When the first preset temperature < T a If the second preset temperature is less than or equal to the fifth preset temperature, or if the fourth preset temperature is less than or equal to the fifth preset temperature, the motor needs to be slightly cooled, and the intake superheat is either sufficient or slightly insufficient. Or, the fourth preset temperature < ΔT ≤ the fifth preset temperature, T a ≤First preset temperature; The first regulating component 100 receives a signal from the controller 901 and begins to descend, while the first fluid flow channel 611 is closed. The second regulating component 200 receives a signal from the controller 901 and begins to rise, while the second fluid flow channel 612 is open. The airflow direction is as follows: Figure 6 As shown.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A scroll compressor system with an adjustable airflow mode, characterized in that, include: The compressor, the first regulating component, the second regulating component, the temperature sensing unit, and the controller; The compressor has a motor stator and a lower support assembly inside; the lower support assembly includes a lower support, on which a first fluid flow channel, a second fluid flow channel and a third fluid flow channel are opened, and an air intake filter is provided at the third fluid flow channel. The first adjustment component and the second adjustment component are respectively disposed at position H above the first fluid flow channel and the second fluid flow channel, and are used to independently open and close the corresponding fluid flow channels. The temperature sensing unit includes a first temperature acquisition unit, a second temperature acquisition unit, and a third temperature acquisition unit. The first temperature acquisition unit is used to acquire the first temperature signal T of the motor stator. a The second and third temperature acquisition devices are used to acquire the second temperature signal T at the compressor intake port, respectively. b The third temperature signal T corresponding to the refrigerant saturation temperature at the heat exchanger outlet. c ; The controller is electrically connected to the temperature sensing unit and the first and second adjustment components. The controller performs the following actions: calculating the difference signal ΔT=T of the intake superheat based on the second and third temperature signals. b -T c According to the first temperature signal T a The control command is output based on the comparison result between the difference signal △T and the preset threshold. The control command is used to drive the first adjustment component and the second adjustment component to enter one of the multiple airflow modes defined by the on / off state of the first fluid flow channel and the second fluid flow channel, so as to coordinately adjust the cooling airflow flowing through the motor stator and the intake superheat of the air entering the compression chamber. The controller executes the following control logic: When the first condition is met, both the first and second adjustment components are activated, causing the system to enter the first airflow mode. When the second condition is met, the first regulating component is turned off and the second regulating component is turned on, so that the system enters the second airflow mode. When the third condition is met, both the first and second regulating components are turned off, causing the system to enter the third airflow mode. The first condition is: T a ≤T1 and △T>T5; The second condition is to satisfy any of the following sub-conditions: T1 <T a ≤T2 and △T>T4; △T satisfies T4<△T≤T5 and T a ≤T1; The third condition is that any of the following sub-conditions is satisfied: T2 < T a ≤T3 and △T>0.0001K; 0.0001K<△T≤T4 and T a ≤T2, where K is Kelvin; T1, T2, T3, T4, and T5 are preset thresholds, where T1 < T2 < T3 < T4 < T5.

2. The scroll compressor system with adjustable airflow mode according to claim 1, characterized in that, The first adjustment component includes a first driver, a first push rod, and a first flow guide cover plate fixed to the end of the first push rod. The first flow guide cover plate is driven by the first driver to move up and down to seal or open the corresponding first fluid flow channel. The second adjustment component includes a second driver, a second push rod, and a second flow guide cover plate fixed to the end of the second push rod. The second flow guide cover plate is driven by the second driver to move up and down to seal or open the corresponding second fluid flow channel.

3. The scroll compressor system with adjustable airflow mode according to claim 2, characterized in that, The first, second, and third conditions are based on the first temperature signal T. a The temperature threshold T1 is determined by comparing it with the first preset temperature threshold T1, the second preset temperature threshold T2, and the third preset temperature threshold T3, and by comparing the difference signal ΔT with the fourth preset temperature threshold T4 and the fifth preset temperature threshold T5. <T2<T3,T4<T5。 4. The scroll compressor system with adjustable airflow mode according to claim 1, characterized in that, The H position is located above the lower support assembly and within the inner space of the housing; the first temperature sensor is located at the J position directly opposite the motor stator; the second temperature sensor is located at the K position where the refrigerant flows into the compressor; and the third temperature sensor is located at the L position where the refrigerant flows into the heat exchanger.

5. The scroll compressor system with adjustable airflow mode according to claim 1, characterized in that, In the first airflow mode, the cooling airflow flows through both the first fluid flow channel and the second fluid flow channel to cool the motor stator; in the second airflow mode, the cooling airflow flows through the second fluid flow channel to cool the motor stator. In the third airflow mode, the cooling airflow does not flow through the first fluid flow channel and the second fluid flow channel.

6. A control method for a scroll compressor system with an adjustable airflow mode, implemented based on the scroll compressor system with an adjustable airflow mode as described in claim 5, characterized in that, Includes the following steps: Real-time acquisition of the first temperature signal T a Second temperature signal T b and the third temperature signal T c ; Calculate the difference signal ΔT=T of the intake superheat. b -T c The first temperature signal T a The difference signal ΔT is compared with multiple preset thresholds; Based on the comparison results, determine the current target thermal management condition of the system; Based on the target thermal management conditions, the system is switched to an airflow mode that matches the target thermal management conditions.

7. The control method for a scroll compressor system with an adjustable airflow mode according to claim 6, characterized in that, The determination of the current target thermal management condition of the system based on the comparison results includes: When T a When ≤T1 and △T>T5, the system is in a condition where strong cooling is not required and the intake superheat is sufficient; When T1 is satisfied <T a ≤T2 and △T>T4 or T4<△T≤T5 and T a When T1 is less than or equal to 1, the system is in a condition that requires partial cooling and / or adjustment of intake superheat. When T2 < T a ≤T3 and △T>0.0001K or 0.0001K<△T≤T4 and T a When T2 is less than or equal to 2, the system is determined to be in a condition requiring strong cooling. T1, T2, T3, T4, and T5 are preset threshold values.

8. The control method for a scroll compressor system with an adjustable airflow mode according to claim 7, characterized in that, The step of switching the system to an airflow mode that matches the target thermal management condition includes: If the system is determined to be in a condition where strong cooling is not required and the intake superheat is sufficient, then the first airflow mode is used; if the system is determined to be in a condition where partial cooling is required and / or the intake superheat needs to be adjusted, then the second airflow mode is used; if the system is determined to be in a condition where strong cooling is required, then the third airflow mode is used.

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