compressor

Abstract

The present invention provides a compressor, including a rotor assembly and an oil baffle, the rotor assembly including a rotor core, the rotor core being provided with a first through hole for circulating refrigerant, the oil baffle including: a bottom plate portion connected to the rotor assembly; a second through hole being provided on the bottom plate portion; and a guide pipe provided on a side of the bottom plate portion away from the rotor assembly; the first end of the guide pipe is connected to the first through hole through the second through hole, and the second end extends in a curve in a direction away from the bottom plate portion; the angle between the opening direction of the second end and the rotation direction of the rotor core is 90° to 180°; the present application is conducive to reducing the oil output rate of the compressor and at the same time helping to improve noise.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor. Background Art

[0002] During operation, some refrigerant oil from existing rotary compressors enters the air conditioning system along with the refrigerant. Excessive refrigerant in the air conditioning system can increase compressor wear and shorten its lifespan, while also reducing the heat transfer performance of the system's heat exchangers.

[0003] Furthermore, to improve energy efficiency, rotary compressors typically incorporate refrigerant holes in the rotor core, which results in a higher oil yield. To reduce this yield, compressors often incorporate flat oil baffles above the rotor core, but these are limited in their effectiveness. Furthermore, since the oil-gas mixture (i.e., a mixture of oil and refrigerant) exiting the pump body is directly sprayed onto the baffle, the flow rate is high, resulting in increased noise. Summary of the Invention

[0004] In view of this, the present invention provides a compressor that is beneficial for separating engine oil from an oil-air mixture and is also beneficial for improving noise.

[0005] According to one aspect of the present invention, a compressor is provided, comprising a rotor assembly and an oil baffle, wherein the rotor assembly comprises a rotor core, the rotor core being provided with a first through hole for circulating a refrigerant, and the oil baffle comprising:

[0006] A bottom plate portion is connected to the rotor assembly; a second through hole is provided on the bottom plate portion; a chamber is formed between the bottom plate portion and the rotor core; and

[0007] A flow guide tube is provided on a side of the bottom plate portion facing away from the rotor assembly; a first end of the flow guide tube is connected to the first through hole via the chamber and the second through hole, and a second end extends in a curve in a direction away from the bottom plate portion; an angle between an opening direction of the second end and a rotation direction of the rotor core is 90° to 180°.

[0008] Optionally, the oil baffle further includes a top plate portion, which is located on a side of the flow guide tube away from the bottom plate portion and is connected to the flow guide tube.

[0009] Optionally, the flow guide tube is spiral, and the spiral angle is 90° to 180°.

[0010] Optionally, a lower flange is provided on the outer periphery of the top plate portion, and the outer edge of the lower flange faces the motor winding in the compressor.

[0011] Optionally, a plurality of recessed portions are provided on the inner wall of the top plate portion and / or the lower flange, and the recessed portions are recessed in a direction away from the opening of the second end of the flow guide tube.

[0012] Optionally, the opening of the second end of the flow guide tube faces the recessed portion.

[0013] Optionally, the maximum radial dimension of the second end opening of the flow guide tube is greater than the maximum radial dimension of the first end opening, and / or the maximum radial dimension of the first end opening is greater than or equal to the maximum radial dimension of the second through hole.

[0014] Optionally, the diameter of the flow guide tube gradually increases along the extension direction of the flow guide tube.

[0015] Optionally, the plane where the top plate portion is located is parallel to the plane where the bottom plate portion is located.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] In the compressor provided by the present application, the oil-gas mixture flowing out from the first through hole enters the above-mentioned chamber, and due to the sudden increase in the circulation space, the flow rate of the oil-gas mixture is reduced; then it enters the guide tube with a curved contour, which will further reduce the flow rate of the mixture, which is conducive to separating the refrigeration oil from the mixture and reducing the oil output rate of the compressor; at the same time, the guide tube optimizes the flow field of the mixture flow, which is conducive to improving noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is clear that those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0019] Figure 1 This is a schematic structural diagram of a compressor disclosed in one embodiment of the present invention;

[0020] Figure 2 This is a schematic structural diagram of an oil baffle disclosed in another embodiment of the present invention;

[0021] Figure 3 for Figure 2 Bottom view of the middle oil baffle;

[0022] Figure 4 This is a structural schematic diagram of a compressor disclosed in another embodiment of the present invention;

[0023] Figure 5 This is a schematic structural diagram of an oil baffle disclosed in another embodiment of the present invention;

[0024] Figure 6 for Figure 5 Bottom view of the middle oil baffle;

[0025] Reference numerals

[0026] Oil baffle 101, rotor core 102, bottom plate 103, second through hole 104, flow guide tube 105, upper balancing block 106, top plate 107. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, materials, devices, etc. may be adopted. In other cases, well-known technical solutions are not shown or described in detail to avoid blurring various aspects of the present disclosure. The same reference numerals in the figures represent the same or similar structures, and their detailed descriptions will be omitted.

[0028] The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including," "having," and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0029] like Figure 1 As shown, an embodiment of the present invention discloses a compressor, which includes a rotor assembly and an oil baffle 101. The rotor assembly includes a rotor core 102. The rotor core 102 is provided with a first through hole for circulating refrigerant. Figure 2 The oil baffle 101 includes a bottom plate 103 and a flow guide 105. The bottom plate 103 and the flow guide 105 are connected. The connection method can be welding. This application does not limit this.

[0030] The bottom plate 103 is connected to the rotor assembly. Figure 3, a second through hole 104 is provided on the bottom plate portion 103. A chamber is formed between the bottom plate portion 103 and the rotor core 102. Specifically, illustratively, the rotor assembly further includes an upper balancing block 106 and a lower balancing block respectively provided at the axial ends of the rotor core 102. The oil baffle 101 is provided on the side of the upper balancing block 106 away from the rotor core 102. The bottom plate portion 103 is connected to the upper balancing block 106 in the rotor assembly. Riveting connection can be adopted, which is not limited in this application.

[0031] The flow guide tube 105 is disposed on the side of the bottom plate 103 facing away from the rotor assembly. The first end of the flow guide tube 105 connects to the first through-hole via the cavity and the second through-hole 104, while the second end extends in a curved line away from the bottom plate 103. Specifically, the cavity between the bottom plate 103 and the rotor core 102 connects to the first through-hole, the second through-hole 104 connects to the cavity, and the first end of the flow guide tube 105 connects to the second through-hole 104. In this embodiment, the maximum radial dimension of the second through-hole 104 is equal to or greater than the maximum radial dimension of the first through-hole, facilitating the entry of the oil-gas mixture from the second through-hole 104 into the flow guide tube 105.

[0032] refer to Figure 2 From the perspective of the present invention, the second end of the flow guide tube 105 extends in an upward curve. In this embodiment, the angle between the opening direction of the second end of the flow guide tube 105 and the rotation direction of the rotor core 102 is 90° to 180°. This is beneficial to reducing the flow velocity of the oil-gas mixture in the flow guide tube 105 and improving the oil-gas separation effect. At the same time, it optimizes the flow field of the mixture flow, which is beneficial to reducing noise. The angle between the opening direction of the second end of the flow guide tube 105 and the rotation direction of the rotor core 102 refers to the angle between the first projection direction of the opening direction of the second end of the flow guide tube 105 on the plane where the bottom plate 103 is located and the second projection direction of the rotation direction of the rotor core 102 on the plane where the bottom plate 103 is located.

[0033] It should be noted that the opening direction of the second end of the guide tube 105 refers to the center line of the second end opening and the direction toward the outside of the second end. The rotation direction of the rotor core 102 refers to the tangent direction of the outer circumference of the upper end surface of the rotor core 102 and toward the above-mentioned rotation direction. The tangent direction is the tangent corresponding to the first radial line in the circle where the outer circumference of the upper end surface of the rotor core 102 is located. The first radial line is the line between the projection point of the center point of the second end opening of the guide tube 105 on the upper end surface of the rotor core 102 and the center point of the circle where the outer circumference of the upper end surface of the rotor core 102 is located. For example, refer to Figure 3 , when the rotor core rotates counterclockwise, Figure 3The angle between the opening direction of the second end of the middle flow guide tube 105 and the rotation direction of the rotor core 102 is 180°.

[0034] In this embodiment, an oil-air mixture consisting of engine oil and refrigerant flows out of the first through-hole in the rotor core 102, enters the aforementioned chamber, and then flows through the second through-hole 104 in the bottom plate 103 into the flow conduit 105, where it flows to the compressor housing. Because the cross-sectional area of ​​the chamber is significantly larger than the sum of the cross-sectional areas of the first through-holes, the flow rate of the oil-air mixture can be reduced. The aforementioned restriction on the extension direction of the flow conduit 105 further reduces the flow rate of the mixture, thereby helping to reduce the oil output rate of the compressor.

[0035] It should be noted that Figure 2 、 Figure 3 The oil baffle 101 is shown, and Figure 1 In the oil baffle 101 shown, the structures of the bottom plate 103 and the guide tube 105 are the same. The only difference is that: Figure 2 and Figure 3 Six flow guide tubes 105 are shown in FIG. Figure 1 Three flow guide tubes 105 are shown.

[0036] In this embodiment, the flow guide tube 105 is spiral, with a spiral angle of 90° to 180°. This optimizes the flow field of the mixture flowing within the flow guide tube 105, further reducing the flow velocity of the mixture and thereby reducing the oil output rate of the compressor.

[0037] like Figure 4 As shown, another embodiment of the present invention discloses a compressor. In this embodiment, based on the above embodiment, the oil baffle 101 in the compressor further includes a top plate portion 107. Figures 4 to 6 Top plate 107 is located on the side of flow conduit 105 facing away from bottom plate 103 and is connected to flow conduit 105. The oil-gas mixture ejected from some or all of flow conduit 105 is directed toward top plate 107. The oil in the oil-gas mixture condenses into oil droplets on top plate 107, allowing the refrigerant to flow into the housing, facilitating separation of the oil-gas mixture. The provision of top plate 107 facilitates rapid condensation of the oil and improves oil-gas separation.

[0038] As an optional embodiment, refer to Figure 4 and Figure 5The outer periphery of the top plate 107 is provided with a lower flange. The oil-gas mixture ejected from the flow guide 105 is sprayed toward the top plate 107 and / or the lower flange, where it condenses into oil droplets. Under the action of gravity and centrifugal force, the oil droplets are flung out along the lower flange of the top plate 107. The outer edge of the lower flange faces the motor windings in the compressor, allowing the oil droplets to flow down along the motor windings. Unlike the flat oil baffle 101 in the prior art, which directly flings the oil droplets onto the inner wall of the housing, this method can cool the motor windings, achieving both improved oil separation and motor cooling.

[0039] It should be noted that Figure 5 、 Figure 6 The oil baffle 101 is shown, and Figure 4 In the oil baffle 101 shown, the structures of the bottom plate 103 and the guide tube 105 are the same. The only difference is that: Figure 5 and Figure 6 Six flow guide tubes 105 are shown in FIG. Figure 4 Three flow guide tubes 105 are shown.

[0040] As an optional embodiment, the inner wall of the top plate portion 107 and / or the lower flange is provided with a plurality of recessed portions (not shown in the figure), and the recessed portions are recessed in a direction away from the opening of the second end of the guide tube 105. That is, the inner wall of the top plate portion 107 and / or the lower flange protrudes outward to form the recessed portions. The refrigeration oil thrown into the recessed portions gradually condenses to form oil droplets. The recessed portions are conducive to the rapid condensation of the oil, thereby improving the oil-gas separation effect and reducing the oil output rate of the compressor. As an optional embodiment, the opening of the second end of the guide tube 105 is directly opposite the recessed portion, which is further conducive to the rapid condensation of the oil.

[0041] The height of the above-mentioned concave portion protruding outward is in the range of 0.5 mm to 1 mm, and the concave portion extends toward the outer edge of the lower flange, with an angle of 90° to 180°. However, the present application is not limited thereto.

[0042] As an optional embodiment, the maximum radial dimension of the second end opening of the flow guide tube 105 is greater than the maximum radial dimension of the first end opening, and / or the maximum radial dimension of the first end opening is greater than or equal to the maximum radial dimension of the second through hole 104. When the flow guide tube 105 has a circular cross-section, that is, the aperture at the second end is greater than the aperture at the first end, this further reduces the flow velocity of the oil-gas mixture within the flow guide tube 105, thereby improving oil-gas separation and reducing the oil output rate of the compressor.

[0043] As an optional embodiment, the diameter of the flow guide tube 105 gradually increases along its upward extension direction. This helps to further reduce the flow velocity of the oil-gas mixture in the flow guide tube 105, thereby improving the oil-gas separation effect and reducing the oil output rate of the compressor.

[0044] As an optional embodiment, the plane where the top plate 107 is located is parallel to the plane where the bottom plate 103 is located, which is beneficial for allowing more refrigerator oil to quickly condense into oil droplets on the top plate 107 .

[0045] As an optional embodiment, the structure within the first region of the bottom plate 103 of the oil baffle 101 is hollow. The first region is the projection of the opening of the first end of the flow guide tube 105 onto the bottom plate 103. In other words, the bottom plate 103 of the oil baffle 101 is partially hollow. This further increases the cross-sectional area through which the oil-gas mixture flows when it enters the bottom plate 103, thereby reducing its flow velocity and improving oil-gas separation.

[0046] As an optional embodiment, the entire bottom plate portion 103 of the oil baffle 101 is a hollow structure, which can further increase the flow cross-sectional area of ​​the mixture, thereby facilitating a reduction in its flow velocity and improving the oil-gas separation effect.

[0047] As an optional embodiment, the oil baffle 101 has 6 flow guide pipes 105 , but the present application does not limit the number.

[0048] As an optional embodiment, the height of the oil baffle 101 ranges from 26 mm to 40 mm, which is conducive to the miniaturization design of the compressor.

[0049] In summary, the compressor provided by the present invention has at least the following advantages:

[0050] In the compressor disclosed in this embodiment, the oil-gas mixture flowing out of the first through hole enters the above-mentioned chamber. Due to the sudden increase in the circulation space, the flow rate of the oil-gas mixture decreases; then it enters the guide tube with a curved profile, which will further reduce the flow rate of the mixture, which is conducive to the separation of the refrigeration oil from the mixture and reduces the oil output rate of the compressor; at the same time, the guide tube optimizes the flow field of the mixture flow, which is conducive to improving noise.

[0051] On the other hand, the oil droplets condensed on the top plate are thrown out along the lower flange of the top plate under the action of gravity and centrifugal force, and the outlet of the flange is facing the motor winding, so that the oil droplets flow down along the motor winding. Unlike the flat oil baffle in the prior art, the oil droplets are directly thrown to the inner wall of the shell, which can cool the motor winding and achieve the purpose of cooling the motor while improving the oil separation effect.

[0052] In the description of the present invention, it should be understood that the terms "bottom", "longitudinal", "lateral", "upper", "lower", "front", "back", "vertical", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more, and "several" means one or more.

[0053] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. Throughout this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0054] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A compressor comprising a rotor assembly and an oil baffle (101), wherein the rotor assembly comprises a rotor core (102), and the rotor core (102) is provided with a first through hole for circulating a refrigerant, wherein: The oil baffle (101) comprises: A bottom plate portion (103) is connected to the rotor assembly; a second through hole (104) is provided on the bottom plate portion (103); a chamber is formed between the bottom plate portion (103) and the rotor core (102), and the cross-sectional area of ​​the chamber is greater than the sum of the cross-sectional areas of the first through holes; and A flow guide tube (105) is provided on a side of the bottom plate (103) away from the rotor assembly; a first end of the flow guide tube (105) is connected to the first through hole via the chamber and the second through hole (104), and a second end extends in a curve in a direction away from the bottom plate (103); an angle between an opening direction of the second end and a rotation direction of the rotor core (102) is 90° to 180°; the flow guide tube (105) is spiral, and a spiral angle is 90° to 180°.

2. The compressor according to claim 1, wherein The oil baffle (101) further comprises a top plate portion (107), wherein the top plate portion (107) is located on a side of the flow guide tube (105) away from the bottom plate portion (103) and is connected to the flow guide tube (105).

3. The compressor according to claim 2, wherein The outer periphery of the top plate portion (107) is provided with a lower flange, and the outer edge of the lower flange faces the motor winding in the compressor.

4. The compressor according to claim 3, wherein The top plate portion (107) and / or the inner wall of the lower flange are provided with a plurality of recessed portions, and the recessed portions are recessed in a direction away from the opening of the second end of the guide tube (105).

5. The compressor according to claim 4, wherein The opening of the second end of the flow guide tube (105) faces the recessed portion.

6. The compressor according to claim 1, wherein The maximum radial dimension of the second end opening of the guide tube (105) is greater than the maximum radial dimension of the first end opening, and / or the maximum radial dimension of the first end opening is greater than or equal to the maximum radial dimension of the second through hole (104).

7. The compressor according to claim 1, wherein Along the extension direction of the flow guide tube (105), the diameter of the flow guide tube (105) gradually increases.

8. The compressor according to claim 2, wherein The plane where the top plate portion (107) is located is parallel to the plane where the bottom plate portion (103) is located.

Images