Balance block structure and pump body assembly

Abstract

This application discloses a balance block structure and a pump body assembly. The balance block structure includes a balance block body. The balance block body has a windward end, and at least one edge is provided at the windward end. This application can solve the problems in the prior art where the balance block on the motor rotor in the compressor easily increases the wind resistance of the motor rotor and easily breaks oil droplets into fine oil mist, resulting in excessive discharge of lubricating oil.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and more specifically, to a balance block structure and a pump body assembly. Background Technology

[0002] A rotary compressor uses a motor to drive a crankshaft to rotate eccentrically, which in turn drives a rotor to compress refrigerant gas. Because the unbalanced torque generated by the eccentric rotation causes severe vibration in the compressor, a counterweight needs to be installed on the motor rotor to counteract the radial force exerted by the rotor on the crankshaft during motor rotation.

[0003] However, existing balance weights increase the air resistance of the motor rotor during compressor operation, thus increasing the compressor's power consumption. Furthermore, as the compressed gaseous refrigerant exits the compressor, it carries some lubricating oil droplets that flow through the motor. The high-speed rotating balance weights on the motor rotor break up large oil droplets into fine oil mist. This fine oil mist is easily discharged from the compressor along with the refrigerant flow, causing excessive lubrication loss. This results in insufficient lubrication of key friction pairs in the compressor pump body, accelerating component wear and shortening the compressor's lifespan. Utility Model Content

[0004] The main objective of this application is to provide a balance block structure and pump body assembly to solve the problems in the prior art where the balance block on the motor rotor inside the compressor easily increases the wind resistance of the motor rotor and easily breaks oil droplets into fine oil mist, resulting in excessive discharge of lubricating oil.

[0005] According to one aspect of this application, a balance block structure is provided, comprising:

[0006] The balance block body has a windward end, and the windward end is provided with at least one edge.

[0007] Furthermore, the edge extends along the height direction of the balance block body or in a direction perpendicular to or inclined to the height direction of the balance block body.

[0008] Furthermore, within the projection of the balance block body in the height direction, the balance block body is crescent-shaped, the inner side of the crescent shape has a first arc-shaped surface, and the outer side of the crescent shape opposite to the inner side has a second arc-shaped surface. The side of the first arc-shaped surface near the windward end and the side of the second arc-shaped surface near the windward end are respectively connected to the edge.

[0009] Furthermore, the balance block body extends circumferentially around the first axis, and the balance block body has a first end face and a second end face that are arranged opposite each other along its own height direction. The first arc-shaped surface and the second arc-shaped surface are both located between the first end face and the second end face. Along the direction from the first end face to the second end face, the distance between the first arc-shaped surface and the first axis gradually increases, and the distance between the second arc-shaped surface and the first axis gradually decreases.

[0010] Furthermore, the edge includes two edges, which are spaced apart along the outer surface of the windward end, and a first plane is formed between the two edges. The first plane is connected to the first arc-shaped surface and the second arc-shaped surface through the two edges respectively.

[0011] Furthermore, the main body of the balance block includes a base and an air-breaking section, the air-breaking section being disposed on the base, and the air-breaking section being provided with a first arc-shaped surface, a second arc-shaped surface, the edge, and the first plane; and / or,

[0012] The base and the air-breaking section are integrally formed; and / or

[0013] The first plane may include one or more, and when the first plane includes multiple first planes, the multiple first planes are arranged sequentially along the outer surface of the windward end.

[0014] Further, the sum of the areas of the first arcuate surface, the second arcuate surface, and the first plane is S1, and the maximum cross-sectional area obtained by cutting the balance block body along a direction perpendicular to the height of the balance block body is S2, wherein S1 and S2 satisfy the following relationship: 0.4 ≤ S1 / S2 ≤ 0.8; and / or,

[0015] The sum of the areas of the first arc-shaped surface, the second arc-shaped surface, and the first plane is S1, and the area of ​​the first plane is S3. S1 and S3 satisfy the relationship: 0.01≤S3 / S1≤0.1.

[0016] Furthermore, the main body of the balance block has a second end face, wherein the first arcuate surface, the second arcuate surface, and the first plane are all connected to the second end face, wherein:

[0017] The angle θ1 between the first plane and the second end face satisfies the following relationship: 140°≤θ1≤160°; and / or,

[0018] The included angle θ2 between the first arcuate surface and the second end face satisfies the following relationship: 115°≤θ2≤160°; and / or,

[0019] The included angle θ3 between the second arc-shaped surface and the second end face satisfies the following relationship: 100°≤θ3≤160°.

[0020] Furthermore, the edge is provided at the end of the balance block body away from the windward end.

[0021] On the other hand, this application also provides a pump body assembly, which includes the above-described balance block structure.

[0022] This application, by providing at least one edge at the windward end, not only guides the high-speed airflow, allowing it to flow smoothly along the edge and effectively reducing the wind resistance of the balance block body during rotation, thereby reducing the overall wind resistance of the motor rotor, but also concentrates the dispersion force when oil droplets collide, cutting large oil droplets into smaller ones. This effectively prevents oil droplets from being broken into fine oil mist and discharged from the compressor along with the refrigerant flow, reducing the amount of oil discharged by the compressor and extending its service life. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0024] Figure 1 This is a schematic diagram of the balance block body disclosed in the embodiments of this application from a first-view perspective.

[0025] Figure 2 This is a schematic diagram of the main body of the balance block disclosed in the embodiment of this application when viewed from a second perspective;

[0026] Figure 3 This is a schematic diagram of the structure of the balance block body disclosed in the embodiments of this application when viewed from a third-person perspective;

[0027] Figure 4 This is a cross-sectional view of the main body of the balance block disclosed in the embodiments of this application;

[0028] Figure 5 This is a cross-sectional view of the pump body assembly disclosed in an embodiment of this application;

[0029] Figure 6 This is a cross-sectional view of the compressor disclosed in an embodiment of this application.

[0030] The above figures include the following reference numerals:

[0031] 10. Balance block body; 101. Base; 102. Windbreak section; 11. Windward end; 12. First arc-shaped surface; 13. Second arc-shaped surface; 14. First plane; 15. First end face; 16. Second end face; 20. Edge; 30. First axis; 40. Motor; 41. Motor rotor; 50. Pump body assembly; 51. Crankshaft; 52. Rotor. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0035] As mentioned in the background section, in related technologies, a balance block is typically installed on the motor rotor inside the compressor to counteract the radial force exerted by the rotor on the crankshaft during motor rotation. However, when the compressor is running, the existing balance block not only increases the air resistance of the motor rotor, increasing the compressor's power consumption, but also breaks large oil droplets passing through the motor into fine oil mist. This fine oil mist is easily discharged from the compressor along with the refrigerant flow, causing excessive loss of lubricating oil. This results in insufficient lubrication of the key friction pairs of the compressor pump body, exacerbating component wear and shortening the compressor's service life. To address this, the inventors of this application have designed a new balance block structure. This balance block structure can at least reduce the air resistance of the balance block during compressor operation, while also reducing the degree of impact and breakage of oil droplets by the balance block. The balance block structure of this application will be described in detail below with reference to the accompanying drawings.

[0036] See Figures 1 to 3 As shown in the embodiment of this application, a balance block structure is provided, which includes a balance block body 10. Specifically, the balance block body 10 has a windward end 11, and at least one edge 20 is provided at the windward end 11.

[0037] In actual use of this balance block structure, the balance block body 10 can be installed on the end face of the motor rotor 41 inside the compressor to counteract the radial force exerted on the crankshaft 51 by the rotor 52, which is sleeved on the eccentric part of the crankshaft 51, during the rotation of the motor 40. When the rotor 52 drives the balance block body 10 to rotate, the windward end 11 is at the front end of the rotation direction of the balance block body 10, and this windward end 11 is the first to come into contact with the airflow and oil droplets inside the compressor. Since the windward end 11 in this embodiment is provided with at least one edge 20, when the airflow moves towards the windward end 11, the edge 20 at the windward end 11 can guide the oncoming high-speed airflow, so that the airflow is smoothly diverted along the edge 20, reducing the residence time of the airflow at the windward end 11, thereby reducing the wind resistance of the balance block body 10 during rotation, and thus reducing the overall wind resistance of the motor rotor 41. At the same time, when large oil droplets move towards the windward end 11, they will preferentially contact the edge 20 instead of directly contacting the entire end face of the balance block body 10. The narrow surface contact of edge 20 concentrates the impact force of oil droplets during impact within the edge 20 area, thereby cutting large oil droplets into smaller ones and effectively preventing them from being shattered into fine oil mist due to large-area, high-intensity impacts. These small oil droplets gradually fall back into the oil sump at the bottom of the compressor under their own gravity, replenishing the lubricating oil in the sump and ensuring that the oil level in the sump is always maintained at a level that meets the internal lubrication requirements of the compressor.

[0038] In other words, by providing at least one edge 20 at the windward end 11, this embodiment can not only guide the high-speed airflow and make the airflow smoothly flow along the edge 20, effectively reducing the wind resistance of the balance block body 10 during rotation, thereby reducing the overall wind resistance of the motor rotor 41, but also concentrate the dispersion force when the oil droplets collide to cut the large oil droplets into small oil droplets, effectively preventing the oil droplets from being broken into fine oil mist and discharged from the compressor along with the refrigerant airflow, reducing the amount of oil discharged by the compressor and extending the service life of the compressor.

[0039] Further, see Figures 1 to 2 As shown, in this embodiment, the edge 20 extends along the height direction of the balance block body 10 or extends in a direction perpendicular to or inclined to the height direction of the balance block body 10. This arrangement allows airflow to be diverted along the edge 20 to different positions on the balance block body 10, and these different diversion positions can specifically match the airflow movement patterns within the compressor and the structural requirements of the balance block, resulting in a more efficient wind resistance control effect. It should be noted that the "height direction of the balance block body 10" in this application refers to... Figure 1 The direction indicated by the middle arrow X.

[0040] Specifically, when the edge 20 extends along the height direction of the balance block body 10, the airflow is diverted to the left and right sides of the balance block body 10, reducing the contact time between the airflow and the sides of the balance block body 10 and reducing the wind resistance brought by the airflow; when the edge 20 extends along the direction perpendicular to the height direction of the balance block body 10, the airflow is diverted to the upper and lower sides of the balance block body 10, thereby making full use of the flow space on the upper and lower sides of the balance block body 10 and avoiding the accumulation of airflow in a single area; when the edge 20 extends along the direction inclined to the height direction of the balance block body 10, the airflow is diverted to the oblique area of ​​the balance block body 10, and the diversion path will match the movement trajectory of the oblique airflow in the compressor, so that smooth flow can be achieved without forcibly changing the original direction of the airflow. Regardless of whether the airflow is diverted to the upper, lower, left, right, or oblique position of the balance block, it is essentially guided by the edge 20 to allow the airflow to avoid the high-resistance area of ​​the balance block body 10, thus achieving on-demand diversion. This ensures that the airflow can pass smoothly under different working conditions and works in synergy with the function of the edge 20 in cutting oil droplets, allowing the balance block body 10 to flexibly adapt to the actual scenario in terms of both reducing wind resistance and controlling oil mist.

[0041] Further, see Figures 1 to 3 As shown, in the projection of the balance block body 10 in the height direction, the balance block body 10 in this embodiment is crescent-shaped. The inner side of the crescent shape has a first arc surface 12, and the outer side of the crescent shape opposite to the inner side has a second arc surface 13. The side of the first arc surface 12 near the windward end 11 and the side of the second arc surface 13 near the windward end 11 are respectively connected to the edge 20.

[0042] Specifically, in this embodiment, by making the balance block body 10 crescent-shaped in its projection along its own height direction, the balance block body 10 can better fit the arc-shaped contour of the end face of the motor rotor 41, reducing the interference between the balance block and surrounding components during the rotation of the motor rotor 41. At the same time, the crescent-shaped structure can reduce the overall mass of the balance block body 10 by reasonably distributing its own weight, while ensuring the effect of offsetting the radial force of the rotor 52 on the crankshaft 51, thereby reducing the inertial load when the rotor 52 rotates and further improving the smoothness of the motor 40 operation.

[0043] Meanwhile, the first arc-shaped surface 12 on the inner side of the crescent shape and the second arc-shaped surface 13 on the outer side form smooth curved surface structures from the inner and outer sides of the balance block body 10, respectively. This smoothly guides the airflow after it is diverted by the edge 20 to the inner and outer regions of the balance block body 10. This not only avoids the airflow from getting stuck or turbulent at the junction of the edge 20 and the first arc-shaped surface 12, allowing the airflow to smoothly bypass the inner side of the balance block body 10 along the curved trajectory of the first arc-shaped surface 12, further reducing the flow resistance of the inner airflow, but also plays the same smooth guiding role for the airflow diverted to the outer side by the edge 20. This allows the outer airflow to smoothly diffuse along the curved surface of the second arc-shaped surface 13, reducing the frictional contact between the airflow and the outer side of the balance block body 10. At the same time, the arc shape of the second arc-shaped surface 13 can also reduce the reverse impact force of the external airflow on the balance block body 10, preventing the balance block body 10 from shaking due to the impact of the external airflow when rotating at high speed.

[0044] In addition, after the large oil droplet is cut into small oil droplets by the edge 20, some of the small oil droplets will slide down along the curved surface of the first arc surface 12 or the second arc surface 13. The smoothness of the arc surface can prevent the small oil droplets from getting stuck due to surface protrusions or edges during the sliding process, and accelerate the speed at which the small oil droplets fall back into the oil pool.

[0045] Further, see Figure 1 and Figure 5 As shown, in this embodiment, the balance block body 10 extends circumferentially around the first axis 30, and the balance block body 10 has a first end face 15 and a second end face 16 arranged opposite each other along its own height direction. The first arc-shaped surface 12 and the second arc-shaped surface 13 are both located between the first end face 15 and the second end face 16. Along the direction from the first end face 15 to the second end face 16, the distance between the first arc-shaped surface 12 and the first axis 30 gradually increases, and the distance between the second arc-shaped surface 13 and the first axis 30 gradually decreases. It should be noted that the "first axis 30" in this application refers to the central axis of the motor rotor 41.

[0046] Specifically, when the balance block body 10 is installed on the end face of the motor rotor 41, the first end face 15 contacts the end face of the motor rotor 41, and the second end face 16 is located on the side of the balance block body 10 away from the motor rotor 41. In this embodiment, by making the balance block body 10 extend circumferentially around the first axis 30, the balance block body 10 can better fit the circumferential rotation trajectory of the motor rotor 41. When the balance block body 10 rotates at high speed with the rotor 52, its overall structure forms a stable concentric distribution with the rotation center (first axis 30) of the motor rotor 41, avoiding additional centrifugal force fluctuations during rotation due to structural deviation from the first axis 30, and ensuring a more uniform counteracting effect of the radial force of the rotor 52 by the balance block body 10.

[0047] Meanwhile, by gradually increasing the distance between the first arcuate surface 12 and the first axis 30, this embodiment can gradually guide the airflow diverted from the edge 20 to the inside of the balance block body 10 outward, reducing the flow resistance of the airflow flowing around the windward end 11 to the inside of the balance block body 10. Similarly, by gradually decreasing the distance between the second arcuate surface 13 and the first axis 30, this embodiment can reduce the flow resistance of the airflow flowing around the windward end 11 to the outside of the balance block body 10.

[0048] Further, see Figures 1 to 2 As shown, the edge 20 in this embodiment includes two edges, which are spaced apart along the outer surface of the windward end 11, and form a first plane 14 between the two edges 20. The first plane 14 is connected to the first arc surface 12 and the second arc surface 13 through the two edges 20 respectively.

[0049] Specifically, when the airflow or oil droplets move towards the windward end 11, the two edges 20 can better guide the airflow and cut the oil droplets at different positions. At the same time, the first plane 14 formed between the two edges 20 further optimizes the transition effect of airflow diversion. The first plane 14 is connected to the first arc-shaped surface 12 and the second arc-shaped surface 13 through the two edges 20 respectively, constructing a smooth transition channel from the edges 20 to the arc-shaped surface. After the airflow is initially diverted by the edges 20, it will first move smoothly along the first plane 14 and then naturally transition to the corresponding arc-shaped surface, avoiding the generation of vortices due to the sudden change in angle when the airflow turns directly from the edges 20 to the arc-shaped surface, thus reducing the airflow resistance.

[0050] Further, see Figure 1As shown, the balance block body 10 in this embodiment includes a base 101 and an air-breaking section 102. The air-breaking section 102 is disposed on the base 101, and the air-breaking section 102 is provided with a first arc-shaped surface 12, a second arc-shaped surface 13, an edge 20, and a first flat surface 14. It can be understood that when the balance block body 10 is installed on the motor rotor 41, the base 101 is in contact with the motor rotor 41, and the air-breaking section 102 is located on the side of the base 101 away from the motor rotor 41.

[0051] Specifically, the base 101 provides a stable mounting foundation and weight support for the entire balance block structure. When connected to the end face of the motor rotor 41, the base 101 can ensure the connection stability between the balance block and the rotor 52 through its own structural strength, avoiding loosening or displacement during high-speed rotation. At the same time, the weight distribution of the base 101 can be precisely designed according to the balance requirements of the rotor 52, providing key weight assurance for offsetting the radial force of the rotor 52 on the crankshaft 51. Meanwhile, this embodiment achieves a high degree of integration of functional structures by setting the first arc-shaped surface 12, the second arc-shaped surface 13, the edge 20, and the first plane 14 on the air-breaking part 102. It eliminates the need to disperse the functional structures on the balance block body 10, reducing structural redundancy in non-functional areas and allowing the functional structures to form a closer synergy.

[0052] It is worth mentioning that, since the mass of the balance block body 10 directly affects its effectiveness in counteracting the radial force of the rotor 52, the mass ratio of the base 101, as the load-bearing core, can be flexibly set according to the balance requirements of the motor rotor 41. When the radial force generated by the eccentric part of the crankshaft 51 on the rotor 52 is large, the mass of the base 101 can be increased by increasing the amount of material used in the base 101 or by selecting high-density materials. This utilizes greater inertial force to form a stronger reverse balancing torque, ensuring that the rotor 52 remains axially stable during high-speed rotation. This avoids problems such as insufficient mass of the base 101 leading to weakened balancing effect, which in turn causes rotor 52 to wobble and increased wear of the crankshaft 51. Conversely, if the radial force on the rotor 52 is small, the mass of the base 101 can be appropriately reduced to decrease the load on the motor 40 driving the rotor 52 to rotate while meeting the balance requirements, thereby reducing unnecessary energy consumption.

[0053] Furthermore, in this embodiment, the base 101 and the windbreak part 102 are integrally formed. This improves the structural strength and overall rigidity of the balance block body 10, effectively enhancing its vibration and impact resistance.

[0054] Furthermore, in this embodiment, the first plane 14 includes one or more. When there are multiple first planes 14, they are arranged sequentially along the outer surface of the windward end 11. This arrangement not only allows the windward end 11 to form a more reasonable force distribution during contact with the airflow, avoiding excessive stress in local areas due to concentrated airflow impact, but also provides more orderly guidance for the airflow, reducing turbulence and resistance generated when the airflow passes through.

[0055] Furthermore, in this embodiment, the sum of the areas of the first arc-shaped surface 12, the second arc-shaped surface 13, and the first plane 14 is S1, and the maximum cross-sectional area obtained by cutting the balance block body 10 along the direction perpendicular to the height of the balance block body 10 is S2. S1 and S2 satisfy the relationship: 0.4≤S1 / S2≤0.8. For example, S1 / S2 can be set to 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, etc.

[0056] Specifically, when S1 / S2 is less than 0.4, the total area of ​​the first arc surface 12, the second arc surface 13, and the first plane 14 is too small, which can easily lead to a narrow airflow guidance path and insufficient buffer space for oil droplet attachment, thus weakening the wind resistance reduction and oil mist control effect of the balance block body 10. When S1 / S2 is greater than 0.8, the total area of ​​the first arc surface 12, the second arc surface 13, and the first plane 14 is too large, thereby reducing the mass bearing area of ​​the base 101 and the structural support area of ​​the balance block body 10. This may result in the base 101 being unable to provide sufficient weight to offset the radial force of the rotor 52, or the balance block body 10 having insufficient strength due to the high proportion of functional structure, making it difficult to withstand the centrifugal force and airflow impact during high-speed rotation. In other words, by ensuring that S1 and S2 satisfy the relationship 0.4≤S1 / S2≤0.8, this embodiment not only allows the airflow to have enough space to complete the entire process of edge 20 diversion-planar transition-arc guide after entering the periphery of the balance block body 10, reducing airflow congestion caused by insufficient functional area, but also ensures the structural strength of the balance block body 10.

[0057] Furthermore, in this embodiment, the sum of the areas of the first arc-shaped surface 12, the second arc-shaped surface 13, and the first plane 14 is S1, and the area of ​​the first plane 14 is S3. S1 and S3 satisfy the relationship: 0.01≤S3 / S1≤0.1. For example, S3 / S1 can be set to 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, etc.

[0058] Specifically, when S3 / S1 is less than 0.01, the area of ​​the first plane 14 is too small, providing only a very narrow transition space. The airflow diverted by the edge 20 is prone to directly impacting the arc-shaped surface, making it impossible to achieve a smooth turn and potentially generating local vortices. When S3 / S1 is greater than 0.1, the total area of ​​the first arc-shaped surface 12 and the second arc-shaped surface 13 will be compressed, making it difficult for the first arc-shaped surface 12 and the second arc-shaped surface 13 to provide sufficient guiding paths, resulting in a poor wind resistance reduction effect of the balance block body 10.

[0059] Further, see Figure 5 As shown, the balance block body 10 in this embodiment has a second end face 16. The first arc surface 12, the second arc surface 13 and the first plane 14 are all connected to the second end face 16. The included angle θ1 between the first plane 14 and the second end face 16 satisfies the relationship: 140°≤θ1≤160°. For example, θ1 can be set to 140°, 142°, 144°, 146°, 148°, 150°, 152°, 154°, 156°, 158°, 160°, etc.

[0060] Specifically, when θ1 is less than 140°, the angle between the first plane 14 and the second end face 16 is too small, and the airflow cannot obtain a smooth turning space, making it prone to violent collision with the second end face 16 and generating reverse vortices, thus increasing the wind resistance of the balance block body 10. When θ1 is greater than 160°, the junction between the first plane 14 and the second end face 16 is too gentle, making it difficult to guide the airflow after being split by the edge 20 to the first arc-shaped surface 12 and the second arc-shaped surface 13, thus weakening the wind resistance reduction effect of the balance block body 10. In other words, this embodiment ensures that the angle θ1 between the first plane 14 and the second end face 16 satisfies the relationship: 140°≤θ1≤160°, which not only gives the first plane 14 a better guiding effect but also reduces oil droplet atomization and lowers the oil output of the compressor.

[0061] Furthermore, the included angle θ2 between the first arcuate surface 12 and the second end surface 16 (e.g.) Figure 4 As shown, the following relationship is satisfied: 115°≤θ2≤160°. For example, θ2 can be set to 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0062] Specifically, when θ2 is less than 115°, the airflow diverted by the edge 20 to the first arc surface 12 moves upward to the vicinity of the second end face 16. Because the slope of the first arc surface 12 is steep at this point, it cannot achieve smooth outward expansion and is prone to congestion at the junction of the first arc surface 12 and the second end face 16, which easily increases wind resistance and leads to increased energy consumption. When θ2 is greater than 160°, the junction of the first arc surface 12 and the second end face 16 tends to be gentle. After being cut by the edge 20, the oil droplets are difficult to obtain downward guiding force. Affected by the centrifugal force generated by the rotation of the balance block, they tend to move outward along the arc surface instead of falling back to the lower oil pool, which causes the oil droplets to be carried by the airflow and cause the lubricating oil to be lost. In other words, by making the included angle θ2 between the first arc-shaped surface 12 and the second end face 16 satisfy the relationship: 115°≤θ2≤160°, this embodiment can not only make the first arc-shaped surface 12 have a better flow guiding effect, but also reduce oil droplet atomization and reduce the amount of oil discharged by the compressor.

[0063] Furthermore, the included angle θ3 between the second arcuate surface 13 and the second end face 16 (e.g.) Figure 4 As shown, the following relationship is satisfied: 100°≤θ3≤160°. For example, θ3 can be set to 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc.

[0064] Specifically, when θ3 is less than 100°, the airflow diverted by the edge 20 to the second arc surface 13 moves upward to the vicinity of the second end face 16. Because the slope of the second arc surface 13 is steep at this point, it cannot achieve smooth outward expansion and is prone to congestion at the junction of the second arc surface 13 and the second end face 16, which easily increases wind resistance and leads to increased energy consumption. When θ3 is greater than 160°, the junction of the second arc surface 13 and the second end face 16 tends to be gentle. After being cut by the edge 20, the oil droplets are difficult to obtain downward guiding force. Affected by the centrifugal force generated by the rotation of the balance block, they tend to move outward along the arc surface instead of falling back to the lower oil pool, which causes the oil droplets to be carried by the airflow and cause the lubricating oil to be lost. In other words, by making the included angle θ3 between the second arc-shaped surface 13 and the second end face 16 satisfy the relationship: 100°≤θ3≤160°, this embodiment not only enables the second arc-shaped surface 13 to have a better flow guiding effect, but also reduces oil droplet atomization and reduces the amount of oil discharged by the compressor.

[0065] Further, see Figure 1 As shown, in this embodiment, the end of the balance block body 10 away from the windward end 11 is provided with an edge 20. This configuration can reduce the wind resistance coefficient at both ends of the balance block body 10, and when the balance block is installed on the motor rotor 41 inside the compressor, it is not necessary to distinguish the installation direction of the balance block body 10 according to the rotation direction of the motor rotor 41.

[0066] On the other hand, see Figures 5 to 6 As shown in the illustration, this application also provides a pump body assembly 50, which includes the aforementioned balance block structure. Therefore, the pump body assembly 50 incorporates all the technical effects of the aforementioned balance block structure. Since the technical effects of the balance block structure have already been described in detail above, they will not be repeated here.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0069] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A balance block structure, characterized in that, include: The balance block body (10) has a windward end (11) and at least one edge (20) is provided at the windward end (11). In the projection of the balance block body (10) in the height direction, the balance block body (10) is crescent-shaped. The inner side of the crescent shape has a first arc surface (12), and the outer side of the crescent shape opposite to the inner side has a second arc surface (13). The side of the first arc surface (12) near the windward end (11) and the side of the second arc surface (13) near the windward end (11) are respectively connected to the edge (20).

2. The balance block structure according to claim 1, characterized in that, The edge (20) extends along the height direction of the balance block body (10) or in a direction perpendicular to or inclined to the height direction of the balance block body (10).

3. The balance block structure according to claim 1, characterized in that, The balance block body (10) extends circumferentially around the first axis (30), and the balance block body (10) has a first end face (15) and a second end face (16) arranged opposite to each other along its own height direction. The first arc-shaped surface (12) and the second arc-shaped surface (13) are both located between the first end face (15) and the second end face (16). Along the direction from the first end face (15) to the second end face (16), the distance between the first arc-shaped surface (12) and the first axis (30) gradually increases, and the distance between the second arc-shaped surface (13) and the first axis (30) gradually decreases.

4. The balance block structure according to claim 1, characterized in that, The edge (20) includes two edges, which are spaced apart along the outer surface of the windward end (11) and form a first plane (14) between the two edges (20). The first plane (14) is connected to the first arc surface (12) and the second arc surface (13) respectively through the two edges (20).

5. The balance block structure according to claim 4, characterized in that, The balance block body (10) includes a base (101) and a wind-breaking section (102). The wind-breaking section (102) is disposed on the base (101), and the wind-breaking section (102) is provided with a first arc-shaped surface (12), a second arc-shaped surface (13), the edge (20), and the first plane (14); and / or, The base (101) and the air-breaking section (102) are integrally formed; and / or, The first plane (14) includes one or more, and when the first plane (14) includes multiple, the multiple first planes (14) are arranged sequentially along the outer surface of the windward end (11).

6. The balance block structure according to claim 4, characterized in that, The sum of the areas of the first arcuate surface (12), the second arcuate surface (13), and the first plane (14) is S1. The maximum cross-sectional area obtained by cutting the balance block body (10) along the direction perpendicular to the height of the balance block body (10) is S2. S1 and S2 satisfy the following relationship: 0.4 ≤ S1 / S2 ≤ 0.8; and / or, The sum of the area of ​​the first arc surface (12), the area of ​​the second arc surface (13) and the area of ​​the first plane (14) is S1, and the area of ​​the first plane (14) is S3. S1 and S3 satisfy the relationship: 0.01≤S3 / S1≤0.

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7. The balance block structure according to claim 4, characterized in that, The main body (10) of the balance block has a second end face (16), and the first arc-shaped surface (12), the second arc-shaped surface (13) and the first plane (14) are all connected to the second end face (16), wherein: The angle θ1 between the first plane (14) and the second end face (16) satisfies the following relationship: 140°≤θ1≤160°; and / or, The angle θ2 between the first arcuate surface (12) and the second end surface (16) satisfies the following relationship: 115°≤θ2≤160°; and / or, The included angle θ3 between the second arc-shaped surface (13) and the second end face (16) satisfies the following relationship: 100°≤θ3≤160°.

8. The balance block structure according to any one of claims 1 to 7, characterized in that, The edge (20) is provided at the end of the balance block body (10) away from the windward end (11).

9. A pump body assembly, characterized in that, The pump assembly includes the balance block structure as described in any one of claims 1 to 8.

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