Compression structure and rolling piston compressor
Patent Information
- Application Number
- CN202522450035.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-19
AI Technical Summary
The blade structure of existing rolling rotor compressors has problems such as large heat transfer loss, easy wear and failure of existing heat insulation measures, high cost, and insufficient structural strength.
Design a compression structure with a sealed heat insulation groove inside the blade structure, which is filled with air or vacuum to form a heat insulation layer. One end of the blade structure is movably embedded in the blade groove, and the other end is movably connected to a rolling piston. The force mode is changed from a cantilever beam to a simply supported beam, which enhances the structural stiffness.
It effectively reduces the heat conduction path between the intake chamber and the compression chamber, improves the compressor's energy efficiency, ensures the stability and sealing of the blade structure, reduces heat transfer loss, and improves the compressor's performance.
Smart Images
Figure CN224931839U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rolling rotor compressor technology, and in particular to a compression structure and a rolling rotor compressor. Background Technology
[0002] The energy efficiency of a rolling rotor compressor directly affects the overall energy consumption of the unit. During compressor operation, there is a significant temperature difference between the compression chamber and the suction chamber inside the pump body: the refrigerant in the compression chamber experiences a temperature increase due to continuous compression (typically exceeding 100°C), while the refrigerant in the suction chamber is at a low temperature (close to or lower than ambient temperature) to be compressed. The heat transfer loss between the two chambers (mainly through heat conduction via the "blades" separating the two chambers) is one of the key factors leading to a decrease in compressor energy efficiency.
[0003] The blade structure of existing rolling rotor compressors has the following main technical limitations: The implementation of split blades is challenging. Theoretically, to block the heat conduction path of the blades, split blades (split along the blade thickness direction) can be used, but conventional cantilever beam structures limit the feasibility of this solution. Since only the tail end of the blade is fixed, the split blades have a reduced stress area and insufficient structural strength. During operation, uneven stress can easily cause bending and deformation, leading to failure of the seal with the rotor, resulting in gas leakage between the compression chamber and the suction chamber, and ultimately, compressor performance failure. Furthermore, optimization of blade structure heat transfer often employs methods such as "blade surface coating" and "blades made of low thermal conductivity materials," but coatings are prone to wear and failure, and low thermal conductivity materials (such as ceramics) are expensive and brittle, making it difficult to balance insulation performance, structural strength, and manufacturing cost. Utility Model Content
[0004] The purpose of this invention is to provide a compression structure and a rolling rotor compressor to solve the problem of large heat transfer loss in the blade structure of the existing rolling rotor compressor.
[0005] On one hand, this utility model provides a compression structure, which includes: a cylinder with a blade groove on its inner wall; a rolling piston movably disposed in the cylinder; a blade structure, one end of which is movably embedded in the blade groove, and the other end of which is movably connected to the rolling piston, the blade structure dividing the interior of the cylinder into an intake chamber and a compression chamber; the interior of the blade structure has at least one sealed heat insulation groove, the heat insulation groove extending along the length direction of the blade structure, and the heat insulation groove is filled with air or a vacuum to form a heat insulation layer.
[0006] As an optional technical solution for the compression structure, at least one of the heat insulation grooves is distributed at intervals along the height direction of the blade structure, and the minimum distance between two adjacent heat insulation grooves is H, where 3mm≤H≤5mm.
[0007] As an optional technical solution for the compression structure, the blade structure includes a first blade and a second blade that fit closely together. One end of the first blade and one end of the second blade can be movably embedded in the blade groove. The other end of the first blade and the other end of the second blade are movably connected to the rolling piston. The first blade has a first shallow groove on the side facing the second blade, and the second blade has a second shallow groove on the side facing the first blade that corresponds to the first shallow groove. The first shallow groove and the second shallow groove form the heat insulation groove.
[0008] As an optional technical solution for the compression structure, the width of the first shallow groove is 1mm-3mm; and / or,
[0009] The width of the second shallow groove is 1mm-3mm.
[0010] As an optional technical solution for the compression structure, the length of the first shallow groove is 2mm-10mm; and / or,
[0011] The length of the second shallow groove is 2mm-10mm.
[0012] As an optional technical solution for the compression structure, the depth of the first shallow groove is 0.2mm-1mm; and / or,
[0013] The depth of the second shallow groove is 0.2mm-1mm.
[0014] As an optional technical solution for the compression structure, both the first shallow groove and the second shallow groove are blind grooves or through grooves.
[0015] As an optional technical solution for the compression structure, the first shallow groove is rectangular in shape, and the shape of the second shallow groove matches the shape of the first shallow groove.
[0016] As an optional technical solution for the compression structure, the rolling piston has a hinge groove, and the other end of the blade structure is provided with a hinge joint, which is movably disposed in the hinge groove.
[0017] On the other hand, this utility model provides a rolling rotor compressor, including the compression structure of any of the above-mentioned solutions.
[0018] The beneficial effects of this utility model are as follows:
[0019] This invention provides a compression structure comprising a cylinder, a rolling piston, and a blade structure. The cylinder has blade grooves formed on its inner wall. In this compression structure, the blade structure has at least one sealed heat-insulating groove, which is filled with air or a vacuum to form a heat-insulating layer. This design ensures the stability and reliable sealing of the blade structure while effectively reducing the heat conduction path between the intake and compression chambers, thus reducing heat loss and improving compressor efficiency. Furthermore, one end of the blade structure is movably embedded in the blade groove, and the other end is movably connected to the rolling piston. This connection method transforms the stress pattern of the blade structure from a conventional "cantilever beam" to a "simply supported beam," significantly improving structural stiffness and ensuring the stability and reliability of the blade structure during use. This compression structure effectively solves the problem of high heat loss in the blade structure of existing rolling rotor compressors. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the compression structure in an embodiment of the present invention;
[0021] Figure 2 This is a schematic diagram of the structure of the first blade in an embodiment of the present invention;
[0022] Figure 3 This is a cross-sectional view of the compression structure in an embodiment of this utility model.
[0023] In the picture:
[0024] 1. Cylinder; 11. Vane groove;
[0025] 2. Rolling piston;
[0026] 3. Blade structure; 31. Insulation groove; 32. First blade; 321. First shallow groove; 33. Second blade; 34. Hinge joint. Detailed Implementation
[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0031] like Figures 1 to 3 As shown, this embodiment provides a compression structure, which includes a cylinder 1, a rolling piston 2, and a blade structure 3. The cylinder 1 has a blade groove 11 on its inner wall; the rolling piston 2 is movably disposed within the cylinder 1; one end of the blade structure 3 is movably embedded in the blade groove 11, and the other end of the blade structure 3 is movably connected to the rolling piston 2. The blade structure 3 divides the interior of the cylinder 1 into an intake chamber and a compression chamber; the blade structure 3 has at least one sealed heat insulation groove 31 extending along the length of the blade structure 3. The heat insulation groove 31 is filled with air or a vacuum to form a heat insulation layer.
[0032] The compression structure of this invention features a blade structure 3 with at least one sealed heat-insulating groove 31. This groove 31 is filled with air or a vacuum to form a heat-insulating layer. This design ensures the stability and reliable sealing of the blade structure 3 while effectively reducing the heat conduction path between the intake and compression chambers, thus lowering heat loss and improving compressor efficiency. Furthermore, one end of the blade structure 3 is movably embedded in the blade groove 11, and the other end is movably connected to the rolling piston 2. This connection method transforms the stress pattern of the blade structure 3 from a conventional "cantilever beam" to a "simply supported beam," significantly improving structural stiffness and ensuring the stability and reliability of the blade structure 3 during use. This compression structure effectively solves the problem of high heat loss in the blade structure of existing rolling rotor compressors.
[0033] In some embodiments, at least one heat insulation groove 31 is spaced apart along the height direction of the blade structure 3. For example, Figure 3 As shown, the minimum distance between two adjacent heat insulation grooves 31 is H, where 3mm ≤ H ≤ 5mm. Limiting the minimum distance H between two adjacent heat insulation grooves 31 to the above-mentioned range maximizes the blocking of heat conduction paths without weakening the strength of the blade structure 3.
[0034] In this scheme, the number of heat insulation grooves 31 is 2 or 3.
[0035] In this embodiment, the blade structure 3 includes a first blade 32 and a second blade 33 that fit tightly together. This together forms a seal separating the intake chamber and the compression chamber. One end of the first blade 32 and one end of the second blade 33 can be movably embedded in the blade groove 11, and the other ends of both blades are movably connected to the rolling piston 2. The first blade 32 has a first shallow groove 321 on the side facing the second blade 33, and the second blade 33 has a second shallow groove corresponding to the first shallow groove 321 on the side facing the first blade 32. The first shallow groove 321 and the second shallow groove form a heat insulation groove 31. It should be noted that the first blade 32 and the second blade 33 are arranged in parallel, and their length and height are consistent with conventional one-piece blades, ensuring compatibility with the fitting dimensions of the cylinder 1 and the rolling piston 2.
[0036] In some embodiments, the width of the first shallow groove 321 is 1mm-3mm; and / or, the width of the second shallow groove is 1mm-3mm. This configuration maximizes the blocking of the heat conduction path without weakening the strength of the first blade 32. Wherein, as... Figure 3 As shown, the width of the first shallow groove 321 is d.
[0037] In some embodiments, the length of the first shallow groove 321 is 2mm-10mm; and / or, the length of the second shallow groove is 2mm-10mm. Similarly, while ensuring that the strength of the first blade 32 is not weakened, the heat conduction path is blocked to the maximum extent. Wherein, as... Figure 3 As shown, the width of the first shallow groove 321 is L.
[0038] In some embodiments, the depth of the first shallow groove 321 is 0.2mm-1mm; and / or, the depth of the second shallow groove is 0.2mm-1mm. This maximizes the blocking of the heat conduction path without weakening the strength of the first blade 32.
[0039] In this embodiment, the first shallow groove 321 and the second shallow groove include, but are not limited to, blind grooves or through grooves.
[0040] In some embodiments, the first shallow groove 321 is rectangular in shape, and the shape of the second shallow groove matches that of the first shallow groove 321. This facilitates the filling of air or a vacuum into the heat insulation groove 31 formed by the first shallow groove 321 and the second shallow groove.
[0041] Specifically, the rolling piston 2 has a hinge groove, and the other end of the blade structure 3 is provided with a hinge joint 34, which is movably disposed in the hinge groove. This facilitates the movable connection between the blade structure 3 and the rolling piston 2, and also improves the structural rigidity.
[0042] This embodiment also provides a rolling rotor compressor, including the compression structure described above. In the rolling rotor compressor of this invention, the blade structure 3 has at least one sealed heat-insulating groove 31 inside, and the heat-insulating groove 31 is filled with air or a vacuum to form a heat-insulating layer. This configuration ensures the stability and reliable sealing of the blade structure 3 while effectively reducing the heat conduction path between the suction chamber and the compression chamber, reducing heat transfer loss, and thus improving compressor energy efficiency. Furthermore, one end of the blade structure 3 is movably embedded in the blade groove 11, and the other end of the blade structure 3 is movably connected to the rolling piston 2. This connection method transforms the force distribution mode of the blade structure 3 from a conventional "cantilever beam" to a "simply supported beam," significantly improving structural stiffness and ensuring the stability and reliability of the blade structure 3 during use. The rolling rotor compressor of this invention effectively solves the problem of large heat transfer loss in the blade structure of existing rolling rotor compressors.
[0043] The working principle of this embodiment is as follows:
[0044] The rotor is eccentrically mounted inside the cylinder, with its outer circle tangent to the inner wall of the cylinder, forming a crescent-shaped working chamber (divided into an intake chamber and a compression chamber). The inner side of the blade structure (the side closest to the rotor) is always in contact with the outer circle of the rotor, and the volume of the working chamber changes periodically as the rotor rotates, completing the intake, compression, and exhaust processes of the refrigerant.
[0045] When the compressor is running, the rotor drives the blade structure to reciprocate along the blade slots. The tips of the blade structure push the rolling piston to slide along the cylinder slideway through the hinge. Since both the first and second blades are subject to the dual constraints of the "tipping hinge and the tail blade slot", they move synchronously and are subjected to uniform force, preventing relative offset or deformation. They always maintain a sealed fit with the outer circle of the rotor, avoiding air leakage and achieving structural stability.
[0046] The high temperature on the compression chamber side is transferred through the surface of the first blade. When the heat is conducted to the contact surface between the first and second blades, most of the heat is blocked by the air layer in the insulation groove (the thermal conductivity of air is less than 1 / 1000 of that of metal). Only a very small amount of heat is transferred to the second blade through radiation or convection through the gaps in the insulation groove. The heat that is finally transferred to the intake chamber is greatly reduced, which prevents the refrigerant in the intake chamber from being preheated, thus achieving the insulation effect.
[0047] The advantages of this utility model are as follows:
[0048] 1. Significantly reduced heat transfer loss: Through the combined design of the split blade structure and the heat insulation groove, the heat conduction path from the compression chamber to the suction chamber is effectively blocked, reducing heat transfer loss and lowering the refrigerant temperature in the suction chamber.
[0049] 2. Significantly improve compressor energy efficiency: After the refrigerant temperature in the suction chamber decreases, the density increases, the suction volume per unit time increases, and the power consumption during the compression process decreases, which together improves the compressor's energy efficiency ratio (COP).
[0050] 3. Stable and reliable structure: The connection between the tip hinge and the tail blade groove provides dual constraints for the split blade structure, solving the strength and sealing problems of the split blade structure under conventional structures. The blade structure is free from deformation and gas leakage during operation, and the compressor service life is the same as that of conventional models.
[0051] 4. Good compatibility and economy: The size of the split blade structure is compatible with conventional blades, and there is no need to make major modifications to core components such as cylinders and rotors. The manufacturing cost increases slightly, but it is easy to mass-produce in the industrial sector.
[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A compression structure, characterized in that, include: Cylinder (1), the inner wall of the cylinder (1) is provided with a blade groove (11); A rolling piston (2) is movably disposed within the cylinder (1); The blade structure (3) has one end movably embedded in the blade groove (11) and the other end movably connected to the rolling piston (2). The blade structure (3) divides the interior of the cylinder (1) into an intake chamber and a compression chamber. The interior of the blade structure (3) has at least one sealed heat insulation groove (31). The heat insulation groove (31) extends along the length of the blade structure (3). The heat insulation groove (31) is filled with air or vacuum to form a heat insulation layer.
2. The compression structure according to claim 1, characterized in that, At least one of the heat insulation grooves (31) is distributed at intervals along the height direction of the blade structure (3), and the minimum distance between two adjacent heat insulation grooves (31) is H, 3mm≤H≤5mm.
3. The compression structure according to claim 1, characterized in that, The blade structure (3) includes a first blade (32) and a second blade (33) that fit closely together. One end of the first blade (32) and one end of the second blade (33) can be movably embedded in the blade groove (11). The other end of the first blade (32) and the other end of the second blade (33) are movably connected to the rolling piston (2). The first blade (32) has a first shallow groove (321) on the side facing the second blade (33), and the second blade (33) has a second shallow groove corresponding to the first shallow groove (321) on the side facing the first blade (32). The first shallow groove (321) and the second shallow groove form the heat insulation groove (31).
4. The compression structure according to claim 3, characterized in that, The width of the first shallow groove (321) is 1mm-3mm; and / or, The width of the second shallow groove is 1mm-3mm.
5. The compression structure according to claim 3, characterized in that, The length of the first shallow groove (321) is 2mm-10mm; and / or, The length of the second shallow groove is 2mm-10mm.
6. The compression structure according to claim 3, characterized in that, The depth of the first shallow groove (321) is 0.2mm-1mm; and / or, The depth of the second shallow groove is 0.2mm-1mm.
7. The compression structure according to claim 3, characterized in that, Both the first shallow groove (321) and the second shallow groove are blind grooves or through grooves.
8. The compression structure according to claim 3, characterized in that, The first shallow groove (321) is rectangular in shape, and the shape of the second shallow groove matches the shape of the first shallow groove (321).
9. The compression structure according to any one of claims 1-8, characterized in that, The rolling piston (2) has a hinge groove, and the other end of the blade structure (3) is provided with a hinge joint (34), which is movably disposed in the hinge groove.
10. A rolling rotor compressor, characterized in that, Includes the compression structure described in any one of claims 1-9.