Impeller, compressor and electrical equipment

Abstract

The utility model relates to an impeller, a compressor and electrical equipment, the impeller comprises a hub and a channel assembly, the channel assembly is arranged on the periphery of the hub in a surrounding mode, the channel assembly comprises a wheel cover and a wheel disc which are oppositely arranged, an air inlet channel is formed between the wheel cover and the hub, and an air outlet channel is formed between the wheel cover and the wheel disc; a preset gap exists between the side, back on to the air inlet channel, of the hub and the wheel disc and is used for forming an air supplementing opening communicating with the air inlet channel. According to the impeller, the preset gap exists between the side, back on to the air inlet channel, of the hub and the wheel disc to form the air supplementing opening communicating with the air inlet channel, so that the air inlet airflow and the air supplementing airflow enter the impeller from the two sides of the hub correspondingly, and the air supplementing airflow can act on one side of the hub through the action of the air supplementing airflow; the axial force applied to the impeller by the intake airflow is completely offset or offset part of the axial force applied to the impeller, the axial load of the impeller can be reduced, the axial load of a bearing is reduced, the operation efficiency of the compressor is improved, and meanwhile the operation stability of a rotor in the compressor can be improved.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and more particularly to an impeller, a compressor, and an electrical device. Background Technology

[0002] In existing technologies, to increase the output capacity of the compressor and improve the operating efficiency of the system, a certain amount of gas is supplied through the gas supply channel during the operation of the compressor, which can increase the enthalpy of the system and improve energy efficiency.

[0003] During the gas injection process, the gas input from the gas injection channel needs to be fully mixed with the mainstream high-pressure gas. The impeller generates shear force through high-speed rotation, causing the gas injection gas to mix rapidly with the mainstream gas within the flow channel. However, the main airflow enters along the impeller axis and exits radially, which generates a unidirectional axial force on the impeller. This leads to an increase in the axial load on the impeller and bearings in the compressor, affecting the service life of the bearings and the compressor. Utility Model Content

[0004] This application provides an impeller, a compressor, and an electrical device to solve the technical problem in the prior art that the impeller bears axial force in a single direction, which leads to an increase in the axial load on the impeller and bearings in the compressor.

[0005] In a first aspect, this application provides an impeller, comprising:

[0006] Wheel hub;

[0007] A channel assembly is disposed around the outer periphery of the wheel hub. The channel assembly includes a wheel cover and a wheel disc disposed opposite to each other. An air intake channel is provided between the wheel cover and the wheel hub, and an air outlet channel is provided between the wheel cover and the wheel disc.

[0008] There is a preset gap between the side of the wheel hub facing away from the air intake channel and the wheel disc, which is used to form an air inlet that connects to the air intake channel.

[0009] Optionally, the outer periphery of the hub is provided with a guide section extending toward the air intake.

[0010] Optionally, the air guide includes a first air guide surface and a second air guide surface. The first air guide surface is disposed facing the wheel cover and is used to guide the airflow in the air intake channel. The second air guide surface is disposed away from the wheel cover and extends toward the air outlet channel to guide the airflow at the air inlet.

[0011] Optionally, the first guide surface and the second guide surface are arranged in parallel and both extend toward the air outlet channel.

[0012] Optionally, the impeller also includes a blade assembly connected between the hub and the channel assembly to form an intake channel and an exhaust channel.

[0013] Optionally, the blade assembly includes multiple guide vanes, which are arranged sequentially along the circumference of the hub, with the air intake port correspondingly located in the middle of the guide vanes.

[0014] Secondly, this application provides a compressor, including the impeller provided in the first aspect of this application, and also including a housing, wherein the impeller is rotatably disposed inside the housing, and the housing is provided with an air supply channel communicating with the air supply port.

[0015] Optionally, the housing is provided with an airflow inlet, which is connected to the air intake channel. Along the axial direction of the impeller, the airflow inlet and the air supply channel are located on both sides of the impeller.

[0016] Optionally, the compressor also includes a rotating shaft, on which an impeller is coaxially mounted. The rotating shaft has a shoulder that is positioned opposite to the outlet of the gas supply passage. The hub abuts against the shoulder, and in the radial direction of the rotating shaft, the hub protrudes beyond the shoulder.

[0017] Optionally, the compressor also includes a diffuser, which is mounted on the housing, and the outlet passage is connected to the diffuser; the impeller is sealed and abuts against the housing and the diffuser respectively.

[0018] Optionally, the impeller, housing, and diffuser are all equipped with a comb-tooth sealing structure.

[0019] Thirdly, this application provides an electrical device, including the compressor provided in the second aspect of this application.

[0020] The technical solutions provided in this application have the following advantages compared with the prior art:

[0021] The impeller provided in this embodiment has a preset gap between the impeller and the disc on the side of the hub facing away from the air intake channel, which is used to form an air inlet communicating with the air intake channel. This allows the intake airflow and the air inlet airflow to enter the impeller from both sides of the hub. The air inlet airflow can act on one side of the hub to completely offset or offset part of the axial force exerted on the impeller by the intake airflow, thereby reducing the axial load on the impeller and thus reducing the axial load on the bearing.

[0022] The compressor and electrical equipment provided in this application include the aforementioned impeller, which can improve the axial force on the impeller and bearings by means of the air inlet provided on the hub side. Therefore, it naturally possesses the technical effects of the aforementioned impeller. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0026] Figure 1 A schematic diagram of the impeller structure provided in the embodiments of this application. Figure 1 ;

[0027] Figure 2 A schematic diagram of the impeller structure provided in the embodiments of this application. Figure 2 ;

[0028] Figure 3 A rear view of the impeller provided in an embodiment of this application;

[0029] Figure 4 A front view of the impeller provided in an embodiment of this application;

[0030] Figure 5 A side view of the impeller provided in an embodiment of this application;

[0031] Figure 6 The following are provided for the embodiments of this application: Figure 3 Sectional view of AA;

[0032] Figure 7 A partial cross-sectional view of the impeller provided in an embodiment of this application;

[0033] Figure 8 This is a schematic diagram of the flow guide provided in an embodiment of this application;

[0034] Figure 9 A cross-sectional view of the compressor provided in an embodiment of this application;

[0035] Figure 10 Provided for the embodiments of this application Figure 9 A magnified view of a local detail;

[0036] Figure 11 Provided for the embodiments of this application Figure 10 Enlarged detail view of section B;

[0037] Figure 12 Provided for the embodiments of this application Figure 10 A magnified view of the details in section C.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Hub; 11. Air guide; 111. First air guide surface; 112. Second air guide surface; 12. Main body; 13. Shaft hole;

[0040] 2. Channel assembly; 21. Wheel cover; 211. First comb tooth sealing part; 22. Wheel disc; 221. Second comb tooth sealing part; 23. Air inlet channel; 24. Air outlet channel; 25. Air replenishment port;

[0041] 3. Blade assembly; 31. Guide vane;

[0042] 4. Housing; 41. Air supply channel; 42. Airflow inlet; 43. Third comb tooth sealing part; 44. First air supply plate; 45. Second air supply plate;

[0043] 5. Shaft; 51. Shoulder;

[0044] 6. Diffuser; 61. Fourth comb tooth sealing part;

[0045] 7. Airflow guide;

[0046] 8. Snail shell;

[0047] 9. Bearings;

[0048] 10. Drive components. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0051] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0052] To address the technical problem in the prior art where the impeller bears axial force in a single direction, leading to an increase in the axial load on the impeller and bearing 9 in the compressor, this application provides an impeller, compressor, and electrical equipment. The impeller has a predetermined gap between the impeller and the disc 22 on the side of the hub 1 facing away from the intake channel 23, forming a supplementary air inlet 25 communicating with the intake channel 23. This allows the intake airflow and the supplementary airflow to enter the impeller from their respective axial sides of the hub 1. The supplementary airflow acting on one side of the hub 1 can completely or partially offset the axial force exerted on the impeller by the intake airflow, reducing the axial load on the impeller and thus reducing the axial load on the bearing 9, ensuring the service life of the bearing 9 and the compressor.

[0053] Please see Figures 1 to 12 The first aspect of this application provides an impeller, including a hub 1 and a channel assembly 2. The hub 1 is disposed in the central region of the impeller and has a shaft hole 13 for connecting with a rotating shaft 5 in a compressor, allowing it to rotate synchronously with the rotating shaft 5. Figure 1 , Figure 2 and Figure 9 As shown.

[0054] The channel assembly 2 is arranged around the outer periphery of the hub 1. The channel assembly 2 includes a wheel cover 21 and a wheel disc 22 arranged opposite to each other. Both the wheel cover 21 and the wheel disc 22 are annular structures. An air intake channel 23 is provided between the wheel cover 21 and the hub 1, and an air outlet channel 24 is provided between the wheel cover 21 and the wheel disc 22, so as to realize the axial air intake and radial air outlet of the impeller. Figure 7 and Figure 10 As shown.

[0055] A preset gap exists between the side of the wheel hub 1 facing away from the air intake channel 23 and the wheel disc 22 to form an air inlet 25 communicating with the air intake channel 23, such as... Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown. When the supplementary airflow enters from the supplementary air inlet 25, it applies a certain axial force to the side of the hub 1 facing away from the intake channel 23. Since the axial force applied by the supplementary airflow to the impeller is opposite in direction to the axial force applied by the intake airflow to the impeller, as... Figure 10 As shown (solid arrows indicate the direction of the mainstream gas flow, and dashed arrows indicate the direction of the supplementary air flow), the supplementary air flow can act on one side of the hub 1, completely offsetting or partially offsetting the axial force exerted by the intake air flow on the impeller, thereby reducing the axial load on the impeller and thus reducing the axial load on the bearing 9.

[0056] It should be noted that during impeller production, since the impeller cover 21 is usually manufactured separately, while other components in the impeller (such as the hub 1, the impeller disk 22, and the blade assembly 3) can be manufactured integrally through casting or other methods, if the air inlet 25 is located on the impeller cover 21, the air inlet 25 and the impeller body need to be aligned before assembling the impeller cover 21 with the impeller body. Therefore, compared to setting the air inlet 25 on the impeller cover 21, this application sets the air inlet 25 on the hub 1 side (i.e., the side facing away from the air intake channel 23), which not only balances part of the axial force generated by the intake airflow on the impeller, but also allows the air inlet 25 to be directly prepared through casting. Furthermore, the air inlet 25 does not need to be positioned during the subsequent assembly of the impeller cover 21 and the impeller body, thus improving the impeller's production efficiency.

[0057] In some embodiments of this application, please refer to Figure 6 , Figure 7 and Figure 10 The wheel cover 21 is disposed opposite to the main body 12 and the wheel disk 22 of the hub 1, respectively, and is used to form the air intake channel 23 and the air outlet channel 24. The inner surface of the wheel cover 21 is an arc-shaped surface, which can guide the airflow to enter along the axial direction of the impeller and exit from the radial direction of the impeller.

[0058] In some embodiments of this application, please refer to Figure 1 , Figure 6 , Figure 7 , Figure 8 and Figure 10 The outer periphery of the hub 1 is provided with a guide section 11 extending toward the air inlet 25, which can guide the airflow at the air inlet 25, reduce the airflow conflict between the intake airflow and the air supply airflow at the air inlet 25, and avoid turbulence and vortex when the air supply airflow and the intake airflow merge.

[0059] In some embodiments of this application, please refer to Figure 7 and Figure 10 The airflow guide 11 includes a first airflow guide surface 111 and a second airflow guide surface 112. The first airflow guide surface 111 is disposed facing the wheel cover 21 and transitionally connected to the side wall of the intake channel 23, thereby guiding the airflow within the intake channel 23. The second airflow guide surface 112 is disposed away from the wheel cover 21 and extends toward the exhaust channel 24, thereby guiding the airflow at the air inlet 25, causing the supplementary airflow to move toward the exhaust channel 24 under the action of the second airflow guide surface 112, thus preventing the supplementary airflow from impacting the intake airflow.

[0060] In some embodiments of this application, please refer to Figure 7 The first guide surface 111 and the second guide surface 112 are arranged in parallel and both extend toward the air outlet channel 24, which can make the intake airflow and the replenishment airflow flow into the air outlet channel 24 in a parallel direction, minimizing the pressure loss caused by the collision of the intake airflow and the replenishment airflow.

[0061] It should be noted that the first guide surface 111 and the second guide surface 112 can be curved or flat. As long as they can simultaneously guide the intake airflow and the supplementary airflow, the purpose of this application can be achieved.

[0062] In some embodiments of this application, please refer to Figure 7 Both the first guide surface 111 and the second guide surface 112 are arc-shaped surfaces. Under the guidance of the first guide surface 111 and the second guide surface 112, the airflow achieves a smooth reversal and enters the air outlet channel 24.

[0063] In some embodiments of this application, please refer to Figure 8 The hub 1 has an arc-shaped surface on the side facing the wheel cover 21 to form the sidewall of the intake channel 23. The arc length of the guide part 11 is L1, and the arc length of the inner side of the hub 1 (i.e. the arc length of the hub 1 on the side facing the wheel cover 21) is L2 (including the guide part 11). In order to improve the guiding effect of the guide part 11, it is preferable that L1≥0.25L2, which can ensure that both the intake airflow and the supplementary airflow have a sufficiently long guiding space to avoid the flow direction of the intake airflow and the supplementary airflow from conflicting.

[0064] It should be noted that there is a preset gap between the guide section 11 and the wheel 22 to prevent the guide section 11 from blocking the air supply port 25 and affecting the air supply effect. The specific shape and size of the guide section 11 can be designed based on CFD (Computational Fluid Dynamics) simulation, and are not limited here.

[0065] In some embodiments of this application, please refer to Figures 1 to 7The impeller also includes a blade assembly 3, which is connected between the hub 1 and the channel assembly 2 to divide the internal space of the impeller, forming an intake channel 23 and an exhaust channel 24. At the same time, the rotation of the blade assembly 3 increases the mixing degree and energy of the intake airflow and the supplementary airflow.

[0066] In some embodiments of this application, please refer to Figures 1 to 7 The blade assembly 3 includes multiple guide vanes 31, which are arranged sequentially along the circumference of the hub 1 to separate multiple air intake channels 23 and multiple air outlet channels 24 in the circumference of the hub 1. There are also multiple air inlets 25, which are arranged along the circumference of the hub 1 and correspond one-to-one with the multiple air intake channels 23 to achieve uniform air supply in the circumference of the impeller.

[0067] In the above embodiments, an appropriate location is selected as the air supply location on one side of the impeller hub 1. The selection of the air supply location is determined according to the required operating conditions, but it should be avoided to select the location in the first half of the impeller airflow direction change. In this application, the air supply port 25 is correspondingly set in the middle of the guide vane 31, so that no air supply flow passes through the first half of the guide vane 31 (i.e., the part corresponding to the air inlet channel 23), and air supply flow passes through the second half of the guide vane 31 (i.e., the part corresponding to the air outlet channel 24).

[0068] It should be noted that, since the guide vane 31 is usually a curved blade, this leads to... Figure 3 When the AA section is cut, multiple guide vanes 31 will be cut simultaneously, such as... Figure 6 As shown, to clearly illustrate the structure of this application, this application provides a method for configuring the air supply structure on one side of a single guide vane 31, such as... Figures 7 to 10 As shown, its cutting path can be understood as being parallel to the curved surface of the guide vane 31.

[0069] Please see Figures 1 to 12 The second aspect of this application provides a compressor, including the impeller described in the above embodiments, and a housing 4. The impeller is rotatably disposed inside the housing 4, and can perform work on the gas by rotating inside the housing 4. Under the action of the impeller blades, the gas rotates at high speed with the impeller. Due to the centrifugal force of rotation and the diffusion flow inside the impeller, the pressure, velocity, and temperature of the gas are increased when it flows out of the impeller.

[0070] The housing 4 is provided with an air supply channel 41 that is connected to the air supply port 25. The air pressure at the inlet of the air supply channel 41 is greater than that at the middle section of the impeller compression (at the air supply port 25), so that the air supply flow can flow from the air supply port 25 into the interior of the impeller and participate in the compression process, thereby achieving the purpose of air supply and efficiency enhancement.

[0071] It should be noted that the pressure of the supplementary airflow in the input supplementary air channel 41 can be adjusted, thereby regulating the axial force on the impeller. This can counteract (completely or partially) the axial force brought by the intake airflow in the single-stage high-pressure ratio impeller, thus achieving the function of balancing the axial force of the compressor rotor. The number of supplementary air channels 41 can be one or more, depending on the number of system circulation stages.

[0072] As a specific embodiment of this application, when multiple impellers are connected in series inside the compressor to achieve multi-stage compression, each impeller is provided with a corresponding air supply channel 41.

[0073] In some embodiments of this application, please refer to Figure 9 and Figure 10 The housing 4 has a first air supply plate 44 and a second air supply plate 45 inside, and an air supply channel 41 is formed between the first air supply plate 44 and the second air supply plate 45. Since the impeller has multiple air supply ports 25 in the circumferential direction, and the first air supply plate 44 and the second air supply plate 45 are both annular plates, they are used to form an annular air supply channel 41 (or an annular air supply space), which can realize the supply of air supply to the multiple air supply ports 25 in the circumferential direction of the impeller.

[0074] In some embodiments of this application, please refer to Figure 9 and Figure 10 The housing 4 is provided with an airflow inlet 42, which is connected to the air intake channel 23 and is used to introduce the refrigerant airflow from outside the compressor (i.e., the refrigerant circulation pipeline) into the air intake channel 23.

[0075] Along the axial direction of the impeller, the airflow inlet 42 and the supplementary air passage 41 are located on both sides of the impeller, which allows the intake airflow and the supplementary airflow to exert forces on both sides of the impeller's axial direction respectively. This avoids the impeller being subjected to only the unidirectional axial force of the intake airflow, which helps to alleviate the axial stress on the impeller and reduce the axial load on the impeller and bearing 9.

[0076] In some embodiments of this application, please refer to Figure 9 and Figure 10 The compressor also includes a rotating shaft 5, on which the impeller is coaxially mounted. The rotating shaft 5 is mounted on a bearing 9 inside the housing 4 and can drive the impeller to rotate under the action of the drive component 10, which can be a motor or the like.

[0077] The number of bearings 9 can be multiple. Multiple bearings 9 are arranged sequentially along the axial direction of the rotating shaft 5, which can achieve reliable support for the rotating shaft 5, thereby improving the operating stability of the rotating shaft 5 and the impeller.

[0078] The rotating shaft 5 has a shoulder 51 opposite to the outlet of the air supply channel 41. The hub 1 abuts against the shoulder 51, which can effectively prevent gas leakage along the gap between the rotating shaft 5 and the air supply channel 41. In the radial direction of the rotating shaft 5, the hub 1 protrudes from the shoulder 51. When the air supply airflow applies an axial force to the protruding part of the hub 1, the intake airflow and the air supply airflow can respectively apply forces to both sides of the impeller in the axial direction.

[0079] In some embodiments of this application, please refer to Figure 10 The outer diameter of the main body 12 of the hub 1 is larger than the outer diameter of the shoulder 51. When the air supply air moves toward the air supply port 25, it can apply an axial force to the left to the protruding part of the main body 12, thereby offsetting part of the axial force to the right applied by the intake air supply air to the impeller.

[0080] In some embodiments of this application, please refer to Figure 7 and Figure 10 The compressor also includes a guide vane 7, which is mounted on the rotating shaft 5 and is used to guide the airflow from the air inlet 42 to the air intake passage 23 of the impeller. Axially, the guide vane 7 and the shaft shoulder 51 abut against both sides of the impeller, respectively, to axially limit the impeller on the rotating shaft 5, preventing axial movement of the impeller and avoiding any impact on the airflow path within the compressor.

[0081] In some embodiments of this application, please refer to Figure 9 and Figure 10 The compressor also includes a diffuser 6, which is mounted on the housing 4. The outlet passage 24 is connected to the diffuser 6, allowing the impeller to be directly connected to the diffuser 6. This reduces intermediate transition sections and makes the compressor structure more compact, thereby reducing the compressor's space occupancy and weight.

[0082] The impeller is sealed and abuts against the housing 4 and the diffuser 6 respectively. When the impeller rotates, it can improve the sealing performance between the impeller and the housing 4 and the diffuser 6, and prevent gas leakage when the airflow flows through the inside of the housing 4, the impeller and the diffuser 6 in sequence.

[0083] In some embodiments of this application, please refer to Figure 10 , Figure 11 and Figure 12 The impeller, housing 4, and diffuser 6 are all equipped with a comb-tooth sealing structure. This structure decomposes the total pressure difference into multiple smaller pressure differences through multi-stage tooth grooves. Each stage of the tooth groove consumes gas energy through a throttling effect, significantly reducing the leakage rate. Furthermore, the comb-tooth sealing structure achieves sealing through the tiny gap (typically 0.1-0.5mm) between the tooth grooves and the comb teeth, eliminating the need for physical contact and avoiding frictional wear during impeller rotation.

[0084] In some embodiments of this application, please refer to Figure 10 and Figure 11 The wheel cover 21 is provided with a first comb tooth sealing part 211, and the housing 4 is provided with a third comb tooth sealing part 43. The first comb tooth sealing part 211 and the third comb tooth sealing part 43 cooperate with each other to prevent the intake airflow from leaking from the gap between the housing 4 and the wheel cover 21.

[0085] In some embodiments of this application, please refer to Figure 10 and Figure 12 The wheel 22 is provided with a second comb tooth sealing part 221, and the diffuser 6 is provided with a fourth comb tooth sealing part 61. The second comb tooth sealing part 221 and the fourth comb tooth sealing part 61 cooperate with each other to prevent the replenishing airflow from leaking from the gap between the wheel 22 and the diffuser 6, and can prevent the replenishing airflow entering the outlet channel 24 from being reduced.

[0086] In some embodiments of this application, please refer to Figure 9 and Figure 10 The compressor also includes a volute 8, and the outlet of the diffuser 6 is connected to the volute 8. The connection between the diffuser 6 and the volute 8 ensures a continuous pressure increase process for the airflow from the impeller to the volute 8, avoiding energy loss in the intermediate stages.

[0087] In some embodiments of this application, the compressor is a centrifugal compressor with a gas replenishment structure. Through the above-mentioned structural configuration, the performance of the centrifugal compressor can be effectively improved, and the axial force on the impeller, shaft 5 and bearing 9 can be improved, which is conducive to improving the operating stability of the internal rotor of the compressor, thereby improving the energy efficiency and reliability of the compressor.

[0088] In some embodiments of this application, the compressor is provided with multiple impellers and multiple air supply channels 41, which can realize multi-stage air supply. The specific number of stages can be selected and set according to the operating conditions and pressure ratio changes.

[0089] Please see Figures 1 to 12 A third aspect of this application provides an electrical device including the compressor described in the above embodiments. Because the compressor has a gas replenishment function, it helps to improve the cooling or heating performance of the electrical device.

[0090] In some embodiments of this application, the electrical device is an air conditioner or a refrigerator. The compressor's gas replenishment function enables the air conditioner or refrigerator to reach the set temperature more quickly, improving user comfort. Furthermore, the arrangement of the gas replenishment port 25 can improve the stress distribution on the rotating components inside the compressor, which helps reduce the operating noise of the air conditioner or refrigerator.

[0091] Please see Figures 1 to 12 In some embodiments of this application, the gas replenishment process of the compressor described above is as follows:

[0092] Step 1: The intake airflow is drawn in from the airflow inlet 42, moves along the guide 7 and the intake channel 23 to the replenishment air inlet 25, such as... Figure 10 As shown by the solid arrow, the impeller is subjected to an axial force to the right by the intake airflow at this time;

[0093] Step Two: The replenishing airflow enters from the replenishing air channel 41 and flows to the replenishing air inlet 25, such as... Figure 10 As shown by the dashed arrow, the impeller is subjected to an axial force to the left by the supplementary airflow, which can counteract (completely or partially) the axial force applied by the intake airflow, thus improving the axial force on the impeller and bearing 9.

[0094] Step 3: Under the guidance of the guide section 11, both the intake airflow and the make-up airflow flow towards the outlet channel 24. The intake airflow and the make-up airflow are fully mixed during impeller rotation and are finally output from the outlet channel 24 to the diffuser 6 and the volute 8, thus realizing the compressor's make-up air enthalpy enhancement function. Figure 10 As shown.

[0095] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0096] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0097] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An impeller, characterized in that, include: Wheel hub (1); A channel assembly (2) is disposed around the outer periphery of the hub (1). The channel assembly (2) includes a wheel cover (21) and a wheel disc (22) disposed opposite to each other. An air intake channel (23) is provided between the wheel cover (21) and the hub (1), and an air outlet channel (24) is provided between the wheel cover (21) and the wheel disc (22). There is a preset gap between the wheel hub (1) and the wheel disc (22) on the side facing away from the air intake channel (23) to form an air inlet (25) that communicates with the air intake channel (23).

2. The impeller according to claim 1, characterized in that, The outer periphery of the hub (1) is provided with a guide section (11) extending toward the air inlet (25).

3. The impeller according to claim 2, characterized in that, The air guide (11) includes a first air guide surface (111) and a second air guide surface (112). The first air guide surface (111) is disposed toward the wheel cover (21) and is used to guide the airflow in the air intake channel (23). The second air guide surface (112) is disposed away from the wheel cover (21) and extends toward the air outlet channel (24) and is used to guide the airflow at the air replenishment port (25).

4. The impeller according to claim 3, characterized in that, The first guide surface (111) and the second guide surface (112) are arranged in parallel and both extend toward the air outlet channel (24).

5. The impeller according to any one of claims 1 to 4, characterized in that, It also includes a blade assembly (3) connected between the hub (1) and the channel assembly (2) to form the intake channel (23) and the exhaust channel (24).

6. The impeller according to claim 5, characterized in that, The blade assembly (3) includes multiple guide vanes (31), which are arranged sequentially along the circumference of the hub (1), and the air inlet (25) is correspondingly arranged in the middle of the guide vanes (31).

7. A compressor, characterized in that, The device includes an impeller as described in any one of claims 1 to 6, and also includes a housing (4), wherein the impeller is rotatably disposed inside the housing (4), and the housing (4) is provided with an air supply channel (41) communicating with the air supply port (25).

8. The compressor according to claim 7, characterized in that, The housing (4) is provided with an airflow inlet (42), which is connected to the air intake channel (23). In the axial direction of the impeller, the airflow inlet (42) and the air supply channel (41) are located on both sides of the impeller.

9. The compressor according to claim 7, characterized in that, It also includes a rotating shaft (5), on which the impeller is coaxially disposed. The rotating shaft (5) has a shoulder (51) disposed opposite to the outlet of the air supply channel (41). The hub (1) abuts against the shoulder (51). In the radial direction of the rotating shaft (5), the hub (1) protrudes from the shoulder (51).

10. The compressor according to claim 7, characterized in that, It also includes a diffuser (6), which is disposed on the housing (4), and the air outlet channel (24) is connected to the diffuser (6); the impeller is sealed and abutted against the housing (4) and the diffuser (6) respectively.

11. The compressor according to claim 10, characterized in that, The impeller, the housing (4), and the diffuser (6) are all equipped with a comb-tooth sealing structure.

12. An electrical appliance, characterized in that, Includes the compressor as described in any one of claims 7 to 11.

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