Air suction pipe assembly and compressor unit

Abstract

The utility model discloses an air suction pipe assembly and a compressor unit, the air suction pipe assembly comprises an air suction pipe, the air suction pipe is provided with a vertical section extending along the gravity direction, and a flow channel is arranged in the air suction pipe; the impeller is arranged in a flow channel in the vertical section, and the structure of the impeller is that the impeller rotates to enable a refrigerant in the flow channel to flow towards the radial periphery of the vertical section; the liquid baffle is arranged in the flow channel in the vertical section, the liquid baffle is arranged on the downstream portion of the impeller and located above the impeller, the middle of the liquid baffle is provided with a circulation hole for a refrigerant to pass through, and the periphery of the liquid baffle is connected with the inner wall of the vertical section in a sealed mode. The air suction pipe assembly and the compressor unit effectively solve the problem that in the prior art, air suction of a compressor carries liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, and particularly to an air suction pipe assembly and a compressor unit. Background Art

[0002] Evaporators commonly used in compressor units (centrifugal chillers) are falling film evaporators or flooded evaporators. Liquid refrigerant exchanges heat with heat exchange tubes in the evaporator and evaporates into a refrigerant mixture of gas and liquid phases. It needs to pass through a gas-liquid filter screen to separate the liquid refrigerant, and only then can the separated gaseous refrigerant be sucked into the compressor for compression work by the compressor. Otherwise, if the liquid refrigerant is compressed and sucked into the interior, it will cause dry friction in the internal mechanical structure of the compressor and cause damage.

[0003] However, in actual production, due to problems such as the welding technology used in shell-and-tube evaporators and the operation of workers, the partition welding is not completely sealed, and the refrigerant in the gas-liquid two-phase state after evaporation passes through the gap and enters the interior of the compressor without passing through the gas-liquid filter screen, resulting in liquid carry-over during compressor suction; in addition, during the operation of the compressor unit (centrifugal chiller), when the refrigerant liquid level in the evaporator is too high, the distance between the liquid surface and the gas-liquid filter screen is shortened, and the filtering effect of the gas-liquid filter screen will be weakened, and it is impossible to completely filter and separate the refrigerant in the form of small liquid droplets, easily causing liquid carry-over during suction.

[0004] In summary, there is a problem of liquid carry-over during compressor suction in the prior art. Summary of the Utility Model

[0005] An air suction pipe assembly and a compressor unit are provided in an embodiment of the utility model to solve the problem of liquid carry-over during compressor suction in the prior art.

[0006] To achieve the above object, the utility model provides an air suction pipe assembly, including: an air suction pipe having a vertical section extending along the gravity direction, and a flow channel inside the air suction pipe; an impeller disposed in the flow channel inside the vertical section, and the structure of the impeller is set such that the refrigerant in the flow channel flows toward the radial outer periphery of the vertical section when the impeller rotates; a liquid baffle disposed in the flow channel inside the vertical section, the liquid baffle is disposed downstream of the impeller and above the impeller, a through hole for the refrigerant to pass through is provided in the middle of the liquid baffle, and the outer periphery of the liquid baffle is hermetically connected to the inner wall of the vertical section.

[0007] Further, the liquid baffle is an annular plate, and there is one through hole in the middle of the liquid baffle.

[0008] Further, at least one guide rib is provided on the side of the liquid baffle facing the impeller, the guide rib extends along the radial direction of the vertical section, and one end of the guide rib located at the outer peripheral edge of the liquid baffle is lower than the end of the guide rib away from the outer peripheral edge of the liquid baffle.

[0009] Further, it further includes: a fixing frame, the fixing frame is arranged in the flow channel inside the vertical section, the fixing frame is fixedly connected to the vertical section; the impeller is rotatably installed on the fixing frame.

[0010] Further, a bearing is arranged between the rotating shaft of the impeller and the fixing frame.

[0011] Further, it further includes: a guide ring, the guide ring is arranged in the flow channel inside the vertical section, the guide ring is located between the impeller and the liquid baffle, the outer peripheral edge of the guide ring is hermetically connected to the inner wall of the vertical section; a guide pipe, the vertical section is provided with a guide hole, the guide hole is located between the guide ring and the liquid baffle, the guide pipe is connected to the vertical section, and the guide pipe is communicated with the guide hole; the lowest position point of the guide hole is connected to the surface of the guide ring facing the liquid baffle, and the guide ring guides the liquid refrigerant into the guide pipe.

[0012] According to another aspect of the present invention, a compressor unit is provided, including the above-mentioned suction pipe assembly, the compressor unit includes a compressor, and the suction port of the compressor is connected to the suction pipe assembly.

[0013] According to another aspect of the present invention, a compressor unit is provided, the compressor unit includes the above-mentioned suction pipe assembly; the compressor unit further includes: a compressor, the suction port of the compressor is connected to the suction pipe assembly; a liquid storage tank, the guide pipe is communicated with the liquid storage tank, and the first liquid outlet of the liquid storage tank is communicated with the motor cavity of the compressor.

[0014] Further, the compressor unit further includes: a condenser, arranged in the refrigerant pipeline system of the compressor unit; an evaporator, arranged in the refrigerant pipeline system of the compressor unit; the second liquid outlet of the liquid storage tank is communicated with the evaporator; a cooling pipeline, the first end of the cooling pipeline is communicated with the condenser and takes liquid, and the second end of the cooling pipeline is communicated with the motor cavity of the compressor for cooling; an ejector, arranged on the cooling pipeline, the first liquid outlet of the liquid storage tank is communicated with the ejector through a bypass pipeline, and a solenoid valve is arranged on the bypass pipeline.

[0015] Further, the compressor unit is an air suspension centrifugal chiller.

[0016] During the operation of the unit, the suction generated by the compressor causes the impeller in the suction pipe to rotate. The gas-liquid mixed refrigerant in the evaporator is sucked into the suction pipe by the compressor, passes through the rotating impeller, and the impeller makes the gas-liquid mixed refrigerant flow radially outward and spiral upward through the fan blades. During the spiral upward movement of the gas-liquid mixed refrigerant, due to the large difference in the self-weights of the droplet-shaped refrigerant and the gaseous refrigerant, under the action of centrifugal force, the droplet-shaped refrigerant is thrown towards the inner wall of the suction pipe or spirally upward towards the pipe wall, while the gaseous refrigerant is distributed in the middle position of the suction pipe and enters the compressor along the suction pipe. The spirally upward droplet-shaped refrigerant is relatively close to the pipe wall, and the liquid baffle will block the upward droplet-shaped refrigerant, and then converge and flow towards the inner wall of the suction pipe. Since the liquid baffle separates the suction of the compressor, the liquid refrigerant collected on the inner wall of the suction pipe below the liquid baffle can flow downward. Thus, gas-liquid separation is further achieved at the suction pipe, playing the final gas-liquid separation role and avoiding liquid carry-over during compressor suction. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the suction pipe assembly according to an embodiment of the present invention;

[0018] Figure 2 is an exploded schematic structural diagram of the suction pipe assembly according to an embodiment of the present invention applied to a compressor;

[0019] Figure 3 is an exploded schematic structural diagram of the suction pipe assembly according to an embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of the liquid baffle of the suction pipe assembly according to an embodiment of the present invention;

[0021] Figure 5 is a schematic structural diagram of a part of the suction pipe assembly according to an embodiment of the present invention;

[0022] Figure 6 is a pipeline system diagram of the compressor unit according to an embodiment of the present invention. Detailed Embodiments

[0023] The present invention will be further described in detail below with reference to the drawings and specific embodiments, but it is not limited to the present invention.

[0024] See Figures 1 to 5As shown, according to an embodiment of the present utility model, an intake pipe assembly is provided. The intake pipe assembly includes an intake pipe 10, an impeller 20, and a liquid baffle 30. The intake pipe 10 has a vertical section 11 extending along the direction of gravity, and a flow channel 12 is provided inside the intake pipe 10. The impeller 20 is arranged in the flow channel 12 inside the vertical section 11, and the structure of the impeller 20 is such that when the impeller 20 rotates, the refrigerant in the flow channel 12 flows towards the radial outer periphery of the vertical section 11; the liquid baffle 30 is arranged in the flow channel 12 inside the vertical section 11, the liquid baffle 30 is arranged downstream of the impeller 20 and above the impeller 20, a through hole for the refrigerant to pass through is provided in the middle of the liquid baffle 30, and the outer periphery of the liquid baffle 30 is hermetically connected to the inner wall of the vertical section 11.

[0025] During the operation of the unit, the suction force generated by the compressor causes the impeller in the intake pipe to rotate. The gas-liquid mixed refrigerant in the evaporator is sucked into the intake pipe by the compressor, passes through the rotating impeller, and the impeller makes the gas-liquid mixed refrigerant flow towards the radial outer periphery and spiral upward through the fan blades. During the process of the gas-liquid mixed refrigerant spiraling upward, due to the large difference in the self-weights of the droplet-shaped refrigerant and the gaseous refrigerant, under the action of centrifugal force, the droplet-shaped refrigerant is thrown towards the inner wall of the intake pipe or spirals upward towards the pipe wall, while the gaseous refrigerant is distributed in the middle position of the intake pipe and enters the compressor along the intake pipe. At this time, the distribution of the gaseous refrigerant in the intake pipe is as Figure 1 shown. Since the spiraling upward droplet-shaped refrigerant is relatively close to the pipe wall, the liquid baffle will block the rising droplet-shaped refrigerant, and then collect and flow towards the inner wall of the intake pipe. Since the liquid baffle separates the suction force of the compressor, the liquid refrigerant collected on the inner wall (vertical section) of the intake pipe below the liquid baffle can flow downward. The distribution of the liquid refrigerant in the intake pipe is as Figure 1 shown. Thus, gas-liquid separation is further achieved at the intake pipe, playing the final role of gas-liquid separation and avoiding liquid carry-over during compressor suction.

[0026] The intake pipe assembly of the present invention uses the rotation of the impeller in the intake pipe to make the gas-liquid mixed refrigerant spiral upward. Since the droplet-shaped refrigerant is heavier than the gaseous refrigerant due to its own weight, it is separated under the action of centrifugal force and flies towards the inner wall of the intake pipe and flows back to the liquid storage tank, thereby achieving gas-liquid separation, solving the problem of liquid carry-over during suction. At the same time, the separated liquid low-temperature refrigerant is used to cool the motor over-temperature, improving the stability and reliability of the unit operation.

[0027] Preferably, referring to Figure 3 and Figure 4 , the liquid baffle 30 is an annular plate, and a through hole is provided in the middle of the liquid baffle 30. The area of the through hole in the middle of the liquid baffle is larger than the area of the annular plate of the liquid baffle, which is beneficial for the gaseous refrigerant to enter the compressor and ensures the suction efficiency of the compressor.

[0028] Combined withFigure 1 and Figure 3 As shown in Figure 3 , at least one flow guiding rib 31 is provided on the side surface of the liquid baffle 30 facing the impeller 20. The flow guiding rib 31 extends along the radial direction of the vertical section 11. One end of the flow guiding rib 31 located at the outer peripheral edge of the liquid baffle 30 is lower than the end of the flow guiding rib 31 away from the outer peripheral edge of the liquid baffle 30.

[0029] The function of the flow guiding rib 31 is to guide the liquid refrigerant. The liquid baffle on the upper part of the suction pipe will block the rising droplet-shaped refrigerant, and then gather and flow along the flow guiding rib on the liquid baffle to the inner wall of the suction pipe. In this embodiment, the impeller and the liquid baffle must be placed in the vertical section of the suction pipe. The separated droplet-shaped refrigerant gathers on the inner wall of the suction pipe. The liquid baffle blocks the suction force of the compressor on this part of the droplet-shaped refrigerant. The liquid refrigerant on the inner wall of the vertical section flows downward by gravity, so as to achieve the basic functional effect of gas-liquid separation.

[0030] The suction pipe assembly further includes a fixing frame 40. The fixing frame 40 is arranged in the flow channel 12 inside the vertical section 11. The fixing frame 40 is fixedly connected to the vertical section 11; the impeller 20 is rotatably installed on the fixing frame 40.

[0031] The fixing frame 40 provides a basic structure for installing the impeller 20. The fixing frame 40 is mainly composed of fixing rods. The number of fixing rods is simplified as much as possible. Using fewer fixing rods is beneficial to the flow of refrigerant.

[0032] Preferably, a bearing is provided between the rotating shaft of the impeller 20 and the fixing frame 40. The impeller is evenly distributed with blades (an even number such as 12 can be selected), is connected to the fixing frame through a bearing, and can rotate easily and stably. Too many blades will reduce the flow rate of the refrigerant, and too few blades will not have an obvious spiral effect on the air flow, resulting in poor gas-liquid separation effect of the refrigerant.

[0033] The suction pipe assembly further includes a flow guiding ring 51 and a flow guiding pipe 52. The flow guiding ring 51 is arranged in the flow channel 12 inside the vertical section 11. The flow guiding ring 51 is located between the impeller 20 and the liquid baffle 30. The outer peripheral edge of the flow guiding ring 51 is hermetically connected to the inner wall of the vertical section 11; there is a flow guiding hole on the vertical section 11. The flow guiding hole is located between the flow guiding ring 51 and the liquid baffle 30. The flow guiding pipe 52 is connected to the vertical section 11. The flow guiding pipe 52 is communicated with the flow guiding hole; the lowest position point of the flow guiding hole is connected to the surface of the flow guiding ring 51 facing the liquid baffle 30. The flow guiding ring 51 guides the liquid refrigerant into the flow guiding pipe 52. The flow guiding ring 51 and the flow guiding pipe 52 guide out part of the separated liquid refrigerant for other uses, increasing the flexibility of the system setting.

[0034] When the unit is operating, the suction force generated by the compressor causes the impeller in the suction pipe to rotate. The gas-liquid mixed refrigerant in the evaporator is sucked into the suction pipe by the compressor and passes through the rotating impeller. The impeller makes the gas-liquid mixed refrigerant spiral upward. During the process of the gas-liquid mixed refrigerant spiraling upward, due to the large difference in the self-weight between the droplet-shaped refrigerant and the gaseous refrigerant, under the action of centrifugal force, the droplet-shaped refrigerant is thrown towards the inner wall of the suction pipe or spirals upward towards the pipe wall, while the gaseous refrigerant is distributed in the middle of the suction pipe and enters the compressor along the suction pipe. The droplet-shaped refrigerant spiraling upward is relatively close to the pipe wall, and the liquid baffle at the upper part of the suction pipe will block the rising droplet-shaped refrigerant, and then it will gather and flow along the guiding ribs on the liquid baffle towards the wall of the suction pipe. Since the liquid baffle separates the suction force of the compressor, the liquid refrigerant gathered on the inner wall of the suction pipe below the liquid baffle can flow downward. Due to the guiding effect of the guiding ring, the refrigerant on the wall of the suction pipe flows into the guiding pipe along the guiding ring. Thus, gas-liquid separation is achieved at the suction pipe, avoiding liquid carry-over during the unit's suction process.

[0035] See Figure 2 , the present invention also provides an embodiment of a compressor unit. The compressor unit includes the above-mentioned suction pipe assembly. The compressor unit includes a compressor 61, the suction port of the compressor 61 is connected to the suction pipe assembly, and the compressor unit further includes an evaporator 64. The evaporator 64 is communicated with the suction port of the compressor 61 through a suction pipe. The compressor unit of this embodiment is an air suspension centrifugal water chiller, and the evaporator 64 is a shell-and-tube evaporator.

[0036] The suction pipe assembly of the present invention uses the rotation of the impeller in the suction pipe to make the gas-liquid mixed refrigerant spiral upward. The droplet-shaped refrigerant is heavier than the gaseous refrigerant due to its own weight, and is separated under the action of centrifugal force and flies towards the wall of the suction pipe and flows back to the liquid storage tank, thus achieving gas-liquid separation, solving the problem of liquid carry-over during suction. At the same time, the separated liquid low-temperature refrigerant is used to cool the motor over-temperature, improving the stability and reliability of the unit operation.

[0037] See Figure 6 , the present invention also provides a compressor unit. The compressor unit includes the suction pipe assembly of the above embodiment; the compressor unit further includes:

[0038] A compressor 61, the suction port of the compressor 61 is connected to the suction pipe assembly.

[0039] A liquid storage tank 62, the guiding pipe is communicated with the liquid storage tank 62, and the first liquid outlet of the liquid storage tank 62 is communicated with the motor cavity of the compressor 61.

[0040] When the unit is operating, the suction force generated by the compressor causes the impeller in the suction pipe to rotate. The gas-liquid mixed refrigerant in the evaporator is sucked into the suction pipe by the compressor, passes through the rotating impeller, and the impeller makes the gas-liquid mixed refrigerant spiral upward. During the process of the gas-liquid mixed refrigerant spiraling upward, due to the large difference in the self-weights of the droplet-shaped refrigerant and the gaseous refrigerant, under the action of centrifugal force, the droplet-shaped refrigerant is thrown towards the inner wall of the suction pipe or spirals upward towards the pipe wall, while the gaseous refrigerant is distributed in the middle of the suction pipe and enters the compressor along the suction pipe. The droplet-shaped refrigerant spiraling upward is relatively close to the pipe wall, and the liquid baffle at the upper part of the suction pipe will block the rising droplet-shaped refrigerant, and then the refrigerant converges and flows along the guiding ribs on the liquid baffle towards the wall of the suction pipe. Since the liquid baffle separates the suction force of the compressor, the liquid refrigerant collected on the inner wall of the suction pipe below the liquid baffle can flow downward. Due to the guiding action of the guiding ring, the refrigerant on the wall of the suction pipe flows into the guiding pipe along the guiding ring and enters the liquid storage tank 62 through the guiding pipe for storage and collection. When the motor of the compressor needs to be cooled, the liquid storage tank 62 introduces the refrigerant into the motor cavity of the compressor 61 to cool the electrode, improving the stability and reliability of the unit operation.

[0041] The suction pipe assembly of the present invention utilizes the rotation of the impeller in the suction pipe to make the gas-liquid mixed refrigerant spiral upward. Since the droplet-shaped refrigerant is heavier than the gaseous refrigerant due to its own weight, it is separated under the action of centrifugal force and flies towards the wall of the suction pipe and flows back to the liquid storage tank, thereby realizing gas-liquid separation, solving the problem of liquid carry-over during suction, and at the same time using the separated liquid low-temperature refrigerant to cool the motor over-temperature, improving the stability and reliability of the unit operation.

[0042] Further preferably, the compressor unit further includes:

[0043] A condenser 63, arranged in the refrigerant pipeline system of the compressor unit;

[0044] An evaporator 64, arranged in the refrigerant pipeline system of the compressor unit; the second liquid outlet of the liquid storage tank 62 is communicated with the evaporator 64;

[0045] A cooling pipeline 65, the first end of the cooling pipeline 65 is communicated with the condenser 63 to take liquid, and the second end of the cooling pipeline 65 is communicated with the motor cavity of the compressor 61 for temperature reduction;

[0046] An ejector 66, arranged on the cooling pipeline 65, the first liquid outlet of the liquid storage tank 62 is communicated with the ejector 66 through a bypass pipeline 67, and a solenoid valve 68 is arranged on the bypass pipeline 67.

[0047] When the compressor operates at normal load, the temperature of the compressor motor is normal, the solenoid valve is in the closed state, the cooling pipeline directly takes liquid from the bottom of the condenser, passes through the ejector and enters the motor chamber for cooling. When the liquid refrigerant in the liquid storage tank accumulates to the liquid outlet at the upper part of the tank body, it flows back to the evaporator for secondary heat exchange evaporation, improving the working efficiency of the unit. When the compressor operates with long-term overload, the unit detects that the temperature of the motor chamber is too high through the temperature sensor. At this time, the solenoid valve opens, and the low-temperature liquid refrigerant in the liquid storage tank is ejected into the motor chamber by the ejector to cool the motor chamber, so that the compressor motor returns to the normal working temperature and enables the compressor unit to operate stably.

[0048] In this embodiment, the compressor unit is an air suspension centrifugal chiller.

[0049] In an air suspension centrifugal chiller, the pressure in the condenser is greater than the pressure in the compressor motor chamber, and the temperature of the refrigerant in the condenser is lower than the ambient temperature of the compressor motor chamber. Therefore, the pressure difference between the condenser and the compressor motor chamber is often used to take refrigerant from the condenser into the compressor motor chamber for cooling. However, due to the precise design of the air suspension compressor, its overall shape is relatively small, the thickness of the casting shell is thin, and the cooling flow channel of the motor chamber is built on the inner wall of the casting shell. Therefore, the size of the cooling flow channel of the motor chamber is often relatively small, restricting the refrigerant flow rate for cooling the motor and affecting the motor cooling effect. In addition, the increase in the motor temperature causes the pressure in the motor chamber to rise, increasing the axial force on the bearing and affecting the operation stability of the compressor. See Figure 6 As shown, the liquid refrigerant separated from the suction pipe flows into the liquid storage tank. When the compressor operates at normal load, the temperature of the compressor motor is normal, the solenoid valve is in the closed state, the cooling pipeline directly takes liquid from the bottom of the condenser, passes through the ejector and enters the motor chamber for cooling. When the liquid refrigerant in the liquid storage tank accumulates to the liquid outlet at the upper part of the tank body, it flows back to the evaporator for secondary heat exchange evaporation, improving the working efficiency of the unit. When the compressor operates with long-term overload, the unit detects that the temperature of the motor chamber is too high through the temperature sensor. At this time, the solenoid valve opens, and the low-temperature liquid refrigerant in the liquid storage tank is ejected into the motor chamber by the ejector to cool the motor chamber, so that the compressor motor returns to the normal working temperature. The problem of overheating of the compressor motor in the air suspension centrifugal chiller is solved.

[0050] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.

[0052] Of course, the above are the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the basic principles of the present utility model, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present utility model.

Claims

1. An air intake pipe assembly, characterized in that: include: An air intake pipe (10), the air intake pipe (10) having a vertical section (11) extending in the direction of gravity, and a flow channel (12) inside the air intake pipe (10); An impeller (20) is arranged in the flow channel (12) inside the vertical section (11), and the structure of the impeller (20) is arranged so that the impeller (20) rotates to make the refrigerant in the flow channel (12) flow toward the radial outer periphery of the vertical section (11); A liquid baffle plate (30), wherein the liquid baffle plate (30) is arranged in the flow channel (12) inside the vertical section (11), the liquid baffle plate (30) is arranged downstream of the impeller (20) and above the impeller (20), the middle part of the liquid baffle plate (30) has a flow hole for the refrigerant to pass through, and the outer periphery of the liquid baffle plate (30) is sealed and connected to the inner wall of the vertical section (11).

2. The air intake duct assembly according to claim 1, characterized in that: The liquid baffle plate (30) is an annular plate, and a flow hole is provided in the middle of the liquid baffle plate (30).

3. The air intake duct assembly according to claim 1, characterized in that: At least one guide rib (31) is provided on the side of the liquid baffle plate (30) facing the impeller (20), the guide rib (31) extending in the radial direction of the vertical section (11), and one end of the guide rib (31) located on the outer peripheral edge of the liquid baffle plate (30) is lower than one end of the guide rib (31) away from the outer peripheral edge of the liquid baffle plate (30).

4. The air intake duct assembly according to claim 1, characterized in that: Also includes: A fixing frame (40), the fixing frame (40) being arranged in the flow channel (12) inside the vertical section (11), and the fixing frame (40) being fixedly connected to the vertical section (11); The impeller (20) is rotatably mounted on the fixing frame (40).

5. The air intake duct assembly according to claim 4, characterized in that: A bearing is provided between the rotating shaft of the impeller (20) and the fixing frame (40).

6. The air intake duct assembly according to claim 1, characterized in that: Also includes: a guide ring (51), the guide ring (51) being arranged in a flow channel (12) inside the vertical section (11), the guide ring (51) being located between the impeller (20) and the liquid baffle plate (30), and the outer peripheral edge of the guide ring (51) being sealedly connected to the inner wall of the vertical section (11); A flow guide pipe (52), the vertical section (11) having a flow guide hole, the flow guide hole being located between the flow guide ring (51) and the liquid baffle plate (30), the flow guide pipe (52) being connected to the vertical section (11), and the flow guide pipe (52) being in communication with the flow guide hole; The lowest point of the guide hole is connected to the surface of the guide ring (51) facing the liquid baffle plate (30), and the guide ring (51) guides the liquid refrigerant into the guide pipe (52).

7. A compressor unit, characterized in that: It comprises the air intake pipe assembly according to any one of claims 1 to 6, wherein the compressor unit comprises a compressor (61), and the air intake port of the compressor (61) is connected to the air intake pipe assembly.

8. A compressor unit, characterized in that: The compressor unit comprises the suction pipe assembly according to claim 6; the compressor unit further comprises: A compressor (61), wherein an air intake port of the compressor (61) is connected to the air intake pipe assembly; A liquid storage tank (62), the flow guide pipe is in communication with the liquid storage tank (62), and a first liquid outlet of the liquid storage tank (62) is in communication with a motor cavity of the compressor (61).

9. The compressor unit according to claim 8, characterized in that Also includes: A condenser (63) is arranged in the refrigerant pipeline system of the compressor unit; An evaporator (64) is arranged in the refrigerant pipeline system of the compressor unit; the second liquid outlet of the liquid storage tank (62) is connected to the evaporator (64); A cooling pipeline (65), wherein a first end of the cooling pipeline (65) is connected to the condenser (63) to extract liquid, and a second end of the cooling pipeline (65) is connected to the motor cavity of the compressor (61) to reduce the temperature; The ejector (66) is arranged on the cooling pipeline (65), and the first liquid outlet of the liquid storage tank (62) is connected to the ejector (66) through a bypass pipeline (67), and the bypass pipeline (67) is provided with a solenoid valve (68).

10. The compressor unit according to claim 8, characterized in that The compressor unit is an air-suspended centrifugal chiller.

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