Exhaust assembly, rotary compressor and air conditioning system

Abstract

The application provides an exhaust assembly, a rotary compressor and an air conditioning system. The exhaust assembly comprises a rotating body and a flow channel, the extending direction of the flow channel is the axial direction of the rotating body; a fan blade is sleeved on the rotating shaft of the rotating body and located in the flow channel, and the fan blade can separate the oil gas in the flow channel. In the flow channel extending in the axial direction of the rotating body, the fan blade structure is arranged. With the rotation of the rotating shaft, the oil gas in the flow channel collides with the fan blade and is separated. At the same time, the high-speed rotating fan blade can centrifugally throw out the oil droplets from the flow channel, and the oil content of the exhaust is effectively reduced.

Description

Technical Field

[0001] This application belongs to the field of air conditioning system technology, specifically relating to an exhaust assembly, a rotary compressor, and an air conditioning system. Background Technology

[0002] When a rotary compressor is running, especially at high frequencies, the high-pressure refrigerant flow inside the casing carries some refrigerant oil upwards from the lower oil sump. This refrigerant oil inside the compressor is discharged with the exhaust gas and enters the system, making oil return to the compressor more difficult. This can lead to insufficient refrigerant oil in the compressor, resulting in poor lubrication of compressor components, increased wear, and compromised compressor reliability. Furthermore, an increased oil discharge rate increases the amount of refrigerant oil entering the condenser and evaporator, reducing the heat exchange capacity of the air conditioning system and worsening heat exchange conditions, ultimately leading to a decline in air conditioning system performance.

[0003] Existing technology reduces the oil content in exhaust gas by creating flow holes in the rotor core and adding an oil baffle cap to the top of the motor rotor via riveting. However, at high frequencies and high speeds, the oil separation efficiency in the exhaust gas is low, which means the oil content in the exhaust gas cannot be effectively reduced, and it also reduces the performance of the compressor. Summary of the Invention

[0004] Therefore, this application provides an exhaust assembly, a rotary compressor, and an air conditioning system that can solve the problem of low exhaust oil separation efficiency under high frequency and high speed in the prior art.

[0005] To address the aforementioned problems, this application provides an exhaust assembly, comprising:

[0006] A rotating body, wherein an axially extending flow channel is provided within the rotating body;

[0007] The fan blades are fitted onto the shaft of the rotating body and located at the outlet end of the flow channel, enabling the oil and gas flowing out of the flow channel to be separated.

[0008] Optionally, the fan blades are provided with at least two: a first-stage fan blade and a second-stage fan blade, wherein the first-stage fan blade and the second-stage fan blade are stacked along the axial direction of the rotating body.

[0009] Optionally, along the flow direction of the oil and gas in the flow channel, the first-stage fan blade is located upstream of the second-stage fan blade; the first-stage fan blade is fixedly connected to the rotating shaft, and the second-stage fan blade is rotatably connected to the rotating shaft.

[0010] Optionally, the second-stage fan blade is fitted onto the rotating shaft via a fixing member, wherein the fixing member and the rotating shaft are interference-fitted, and the second-stage fan blade and the fixing member are sliding-fitted.

[0011] Optionally, limiting members are provided on both sides of the second-stage fan blade to prevent the second-stage fan blade from moving axially along the rotating shaft.

[0012] Optionally, the rotation radius of the first-stage fan blade is greater than the rotation radius of the second-stage fan blade.

[0013] Optionally, the number of blades in the first stage fan blade is greater than the number of blades in the second stage fan blade.

[0014] Optionally, the number of blades in the first stage fan blade is set to N, and the number of blades in the second stage fan blade is set to M, satisfying that both N and M are odd numbers, and that N > M ≥ 3.

[0015] Optionally, along the axial direction of the rotating shaft, the thickness of the first-stage fan blade is less than or equal to 5 mm, and the thickness of the second-stage fan blade is greater than or equal to 10 mm.

[0016] Optionally, the rotational speed of the first-stage fan blade (2) is n1, and the rotational speed of the second-stage fan blade (3) is n2, satisfying 0≤|(n2-n1) / n2|≤0.6.

[0017] According to another aspect of this application, a rotary compressor is provided, including the exhaust assembly as described above.

[0018] Optionally, the rotary compressor further includes a rotor with an outer diameter of D. The fan blades include a first-stage fan blade and a second-stage fan blade. The maximum outer diameter of the first-stage fan blade is d1, and the maximum outer diameter of the second-stage fan blade is d2, satisfying D-d1≤3, d2≤3 ... <d1。

[0019] According to another aspect of this application, an air conditioning system is provided, including the exhaust assembly as described above or the rotary compressor as described above.

[0020] This application provides an exhaust assembly comprising: a rotating body having an axially extending flow channel within the rotating body; and a fan blade sleeved on the rotating shaft of the rotating body and located at the outlet end of the flow channel, capable of separating and treating the oil and gas flowing out of the flow channel.

[0021] This application provides a fan blade structure at the outlet of the flow channel extending along the axial direction of the rotating body. As the shaft rotates, the oil and gas flowing out of the flow channel collide with the fan blade and are separated. At the same time, the high-speed rotating fan blade will centrifugally throw the oil droplets out of the flow channel, effectively reducing the oil content of the exhaust gas. Attached Figure Description

[0022] Figure 1 This is a partial structural diagram of the rotary compressor according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the exhaust assembly according to an embodiment of this application;

[0024] Figure 3 Examples of this application Figure 2 Top view;

[0025] Figure 4 This is a schematic diagram of the structure of the second-stage fan blade in an embodiment of this application.

[0026] The reference numerals in the attached figures are as follows:

[0027] 1. Rotor; 11. Through hole; 12. Shaft; 2. First-stage fan blade; 3. Second-stage fan blade; 4. Fixing component; 5. Limiting component. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] See also Figures 1 to 4 As shown, according to an embodiment of this application, an exhaust assembly includes:

[0031] A rotating body, wherein an axially extending flow channel is provided within the rotating body;

[0032] The fan blades are sleeved on the rotating shaft 12 of the rotating body and located at the outlet end of the flow channel, enabling the oil and gas flowing out of the flow channel to be separated.

[0033] This application provides a fan blade structure at the outlet end of the flow channel extending along the axial direction of the rotating body. As the rotating shaft 12 rotates, the oil and gas flowing out of the flow channel collide with the fan blade and are separated. At the same time, the high-speed rotating fan blade will centrifugally throw the oil droplets out of the flow channel, effectively reducing the oil content of the exhaust gas.

[0034] The fan blades can be interference-fitted onto the rotating shaft 12 and rotate synchronously with the shaft 12; alternatively, they can be rotated relative to the shaft 12. When the shaft 12 rotates, the fan blades rotate under the action of oil and gas. Therefore, the fan blades will rotate at high speed. In the axially arranged flow channel, the oil and gas will collide with the fan blades and separate as they pass through them. The high-speed rotating fan blades create an oil-throwing phenomenon, accelerating the oil-gas separation.

[0035] Among them, the high-speed rotating fan blades, due to the certain angle between the blades and the airflow direction, will generate a force on the airflow, which can accelerate the airflow, effectively solve the exhaust flow problem, reduce power, and improve compression performance.

[0036] In some embodiments, the fan blades are provided with at least two: a first-stage fan blade 2 and a second-stage fan blade 3, wherein the first-stage fan blade 2 and the second-stage fan blade 3 are stacked along the axial direction of the rotating body.

[0037] The multi-stage stacked fan blades effectively improve oil removal and reduce the oil content in the exhaust.

[0038] In some embodiments, along the flow direction of the oil and gas in the flow channel, the first stage fan blade 2 is located upstream of the second stage fan blade 3; the first stage fan blade 2 is fixedly connected to the rotating shaft 12, and the second stage fan blade 3 is rotatably connected to the rotating shaft 12.

[0039] In the structure with two-stage fan blades, the first-stage fan blade 2 rotates synchronously with the rotating shaft 12, while the second-stage fan blade 3 rotates under the action of airflow. The combined use of the two-stage fan blades allows the exhaust gas to achieve preliminary oil-gas separation after centrifugal separation by the first-stage fan blade 2. The airflow speed increases, and the airflow continues to enter the second-stage fan blade 3 for oil removal. As the airflow speed increases, the second-stage fan blade 3 rotates faster, performing a second oil-gas separation on the airflow.

[0040] The faster the rotation speed, the more serious the oil content problem becomes. At high frequency and high speed, the airflow velocity is fast. The second-stage fan blade 3 is accelerated to rotate under the action of ultra-fast airflow. The airflow effectively achieves oil-gas separation through centrifugal action.

[0041] In some embodiments, the second-stage fan blade 3 is sleeved on the rotating shaft 12 via a fixing member 4, the fixing member 4 and the rotating shaft 12 are in an interference fit, and the second-stage fan blade 3 and the fixing member 4 are in a sliding fit.

[0042] Since the second-stage fan blade 3 is rotatably mounted relative to the rotating shaft 12, the rotating second-stage fan blade 3 is mounted on a fastener 4 that is rigidly fitted to the rotating shaft 12. The fastener 4 itself can be designed to prevent detachment, thereby improving the operational stability of the high-speed rotating second-stage fan blade 3.

[0043] In some embodiments, limiting members 5 are provided on both sides of the second-stage fan blade 3 to prevent the second-stage fan blade 3 from moving axially along the rotating shaft 12.

[0044] By setting limiting members 5 on both sides of the axial direction of the second-stage fan blade 3, for example, in a structure with a fixing member 4, the limiting members 5 can be set on both ends of the fixing member 4, or on the rotating shaft 12, which can restrict the up and down movement of the second-stage fan blade 3.

[0045] In some embodiments, the rotation radius of the first-stage fan blade 2 is greater than the rotation radius of the second-stage fan blade 3.

[0046] Traditional rotary compressors are prone to wire scraping issues due to their oil-gas separation structure. In this application, the first-stage fan blade 2 is larger than the second-stage fan blade 3, which solves the wire scraping problem when connecting the lead wires. At the same time, the second-stage fan blade 3 is closer to the compressor's exhaust outlet, which can centrifugally separate the airflow rising from the gap between the stator and the compressor housing.

[0047] In some embodiments, the number of blades in the first-stage fan blade 2 is greater than the number of blades in the second-stage fan blade 3. Optionally, the number of blades in the first-stage fan blade 2 is set to N, and the number of blades in the second-stage fan blade 3 is set to M, such that both N and M are odd numbers, and N > M ≥ 3.

[0048] The first-stage fan blade 2 is fixed on the rotating shaft 12 and can rotate synchronously, while the second-stage fan blade 3 rotates passively. It adopts a structure with fewer blades, which facilitates the acceleration of the blades by the airflow. This makes the centrifugal action of the second-stage fan blade 3 more effective in separating oil and gas. Especially at high frequency and high speed, the high airflow speed drives more refrigeration oil to rise, and the two-stage separation effect can more effectively achieve oil and gas separation.

[0049] In some embodiments, along the axial direction of the rotating shaft 12, the thickness of the first-stage fan blade 2 is less than or equal to 5 mm, and the thickness of the second-stage fan blade 3 is greater than or equal to 10 mm.

[0050] Setting the aforementioned axial thickness of the fan blades ensures stability in both the fan blade structure and operation.

[0051] In actual setup, the assembly distance between the two-stage fan blades is not required, and the position of the second-stage fan blade 3 can be designed according to the actual compressor assembly space.

[0052] In some embodiments, the rotational speed of the first-stage fan blade 2 is n1, and the rotational speed of the second-stage fan blade 3 is n2, satisfying 0≤|(n2-n1) / n2|≤0.6.

[0053] The synchronous motor speed satisfies: n = 60f / p, where n is the rotor speed, f is the electrical frequency, and p is the number of magnetic pole pairs. The speed of the first stage fan blade 2 is n1 = n.

[0054] According to another aspect of this application, a rotary compressor is provided, including the exhaust assembly as described above.

[0055] In some embodiments, the rotary compressor further includes a rotor 1, the outer diameter of which is D, and the fan blades include a first-stage fan blade 2 and a second-stage fan blade 3. The maximum outer diameter of the first-stage fan blade 2 is d1, and the maximum outer diameter of the second-stage fan blade 3 is d2, satisfying D-d1≤3, d2 <d1。

[0056] The rotor 1 is usually provided with an axially through hole 11 to facilitate airflow; when comparing the fan blade size with the rotor 1, the smaller the difference between D-d1, the better the oil-throwing effect of the first-stage fan blade 2.

[0057] The second-stage fan-shaped blades are designed with a small size, allowing them to be installed closer to the exhaust pipe without affecting the lead wire connection. The oil-slinging structure is higher than the stator, which can centrifugally separate the airflow surging from the stator air gap into oil and gas.

[0058] Because the rotary compressor of this application adopts a two-stage fan-shaped oil-throwing device, during the operation of the compressor, the refrigerant oil will rise with the exhaust gas flow. After passing through the first and second stage fan blades 3, the oil and gas can be separated by the oil-throwing centrifugal action. The refrigerant oil is separated and returns to the oil sump at the bottom of the compressor. This cycle is repeated. The oil-throwing device can effectively improve the oil blocking effect, reduce the amount of refrigerant oil entering the air conditioning system, effectively improve the heat exchange efficiency of the air conditioning system, and thus improve the performance of the system.

[0059] According to another aspect of this application, an air conditioning system is provided, including the exhaust assembly as described above or the rotary compressor as described above.

[0060] It will be readily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above description is merely a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. An exhaust assembly, characterized in that, include: A rotating body, wherein an axially extending flow channel is provided within the rotating body; The fan blades are sleeved on the rotating shaft (12) of the rotating body and located at the outlet end of the flow channel, which enables the oil and gas flowing out of the flow channel to be separated. The fan blades are provided with at least two: a first-stage fan blade (2) and a second-stage fan blade (3), wherein the first-stage fan blade (2) and the second-stage fan blade (3) are stacked along the axial direction of the rotating body; Along the flow direction of the oil and gas in the flow channel, the first stage fan blade (2) is located upstream of the second stage fan blade (3); the first stage fan blade (2) is fixedly connected to the rotating shaft (12), and the second stage fan blade (3) is rotatably connected to the rotating shaft (12); The number of blades in the first-stage fan blade (2) is greater than the number of blades in the second-stage fan blade (3); The maximum outer diameter of the first-stage fan blade (2) is set as d1, and the maximum outer diameter of the second-stage fan blade (3) is set as d2. <d1; The rotational speed of the first-stage fan blade (2) is n1, and the rotational speed of the second-stage fan blade (3) is n2, satisfying 0≤|(n2-n1) / n2|≤0.

6.

2. The exhaust assembly according to claim 1, characterized in that, The second-stage fan blade (3) is fitted onto the rotating shaft (12) via a fixing member (4). The fixing member (4) and the rotating shaft (12) are in an interference fit, while the second-stage fan blade (3) and the fixing member (4) are in a sliding fit.

3. The exhaust assembly according to claim 1, characterized in that, Limiting members (5) are provided on both sides of the second-stage fan blade (3) to prevent the second-stage fan blade (3) from moving along the axial direction of the rotating shaft (12).

4. The exhaust assembly according to claim 1, characterized in that, The rotation radius of the first-stage fan blade (2) is greater than the rotation radius of the second-stage fan blade (3).

5. The exhaust assembly according to claim 1, characterized in that, The number of blades in the first-stage fan blade (2) is set to N, and the number of blades in the second-stage fan blade (3) is set to M, satisfying that both N and M are odd numbers, and that N > M ≥ 3.

6. The exhaust assembly according to any one of claims 1-5, characterized in that, Along the axial direction of the rotating shaft (12), the thickness of the first-stage fan blade (2) is less than or equal to 5 mm, and the thickness of the second-stage fan blade (3) is greater than or equal to 10 mm.

7. A rotary compressor, characterized in that, Includes the exhaust assembly as described in any one of claims 1-6.

8. An air conditioning system, characterized in that, Includes the exhaust assembly as described in any one of claims 1-6 or the rotary compressor as described in claim 7.

Images