Compression assembly and rotary compressor

Abstract

This utility model relates to the field of compressor technology, and provides a compression assembly and a rotary compressor. Two cylinder heads are provided, spaced apart and fixed relative to each other along the crankshaft axis. A cylinder is located between the two cylinder heads, and the cylinder has a compression chamber. A piston is placed inside the compression chamber. An intake port is formed on the side wall of the cylinder along a direction perpendicular to the crankshaft axis, and one end of the intake port connects to the compression chamber. A first intermediate plate is located on one side of the cylinder along the crankshaft axis and is fixed relative to the cylinder. A first boss is provided on the axial end face of the first intermediate plate on the crankshaft, and the first boss is inserted into the compression chamber. The first boss and the piston are sequentially arranged along the crankshaft axis within the compression chamber. This design allows for increasing the intake port diameter while ensuring the minimum safe wall thickness between the intake port and the cylinder end face, reducing intake resistance, and simultaneously reducing the cylinder height during actual compressor operation, improving cylinder volume utilization, and enhancing compressor performance.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compression assembly and a rotary compressor. Background Technology

[0002] In the development of rotary compressors, miniaturization is a trend. For fixed-speed compressors in dehumidifiers, heat pump dryers, and water heaters, single-cylinder compressors often suffer from high noise and vibration. Therefore, it is necessary to develop dual-cylinder fixed-speed models on the small-diameter A-series to reduce compressor noise and vibration in the system. However, due to the overall height limit, the cylinder needs to be as flat as possible and as low as possible. To ensure the minimum safe wall thickness between the suction port and the cylinder end face, the suction port size is small, which increases suction resistance and reduces compressor performance.

[0003] Therefore, there is an urgent need for a compression assembly and a rotary compressor to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a compression assembly and a rotary compressor that can increase the diameter of the intake port, reduce intake resistance, and improve compressor performance while ensuring the minimum safe wall thickness between the intake port and the cylinder end face.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A compression assembly includes a crankshaft and a piston, the piston being sleeved on an eccentric portion of the crankshaft, and further includes a component sleeved on and rotatably connected to the crankshaft.

[0007] Cylinder head, two cylinder heads are provided, and the two cylinder heads are spaced apart from and fixed relative to each other on the axis of the crankshaft;

[0008] The cylinder is located between the two cylinder heads. The cylinder has a compression chamber, and the piston is placed in the compression chamber. The side wall of the cylinder has an intake port in a direction perpendicular to the axis of the crankshaft, and one end of the intake port is connected to the compression chamber.

[0009] The first intermediate plate is located on one side of the cylinder on the axis of the crankshaft and is fixed relative to the cylinder. The first intermediate plate is provided with a first boss on the axial end face of the crankshaft. The first boss is inserted into the compression chamber. In the compression chamber, the first boss and the piston are arranged sequentially along the axis of the crankshaft.

[0010] As a preferred technical solution of the above-mentioned compression assembly, there are two cylinders, which are located between the two cylinder heads and fixed relative to the cylinder heads. The first intermediate plate is sandwiched between the two cylinders and fixed relative to the cylinders. The first intermediate plate is provided with the first boss on each of the two axial end faces of the crankshaft. In the axial direction of the crankshaft, the first boss is inserted into the compression cavity on the corresponding side.

[0011] As a preferred technical solution of the above-mentioned compression assembly, it further includes a second intermediate plate. Two second intermediate plates are provided, which are located between the two cylinder heads. Each cylinder is sandwiched between the first intermediate plate and the second intermediate plate. A second boss is provided on the side of the second intermediate plate facing away from the cylinder head. The second boss is inserted into the compression chamber, and the piston is located between the first boss and the second boss.

[0012] As a preferred technical solution for the above-mentioned compression assembly, the cylinder and the second intermediate plate are connected by a third threaded fastener.

[0013] As a preferred technical solution of the above-mentioned compression assembly, a sealing layer is provided between the second intermediate plate and the cylinder head;

[0014] And / or, a sealing layer is provided between the second intermediate plate and the cylinder.

[0015] As a preferred technical solution for the above-mentioned compression assembly, the cylinder head and the cylinder are connected by a first threaded fastener.

[0016] As a preferred technical solution for the above-mentioned compression assembly, the cylinder is connected to the first intermediate plate via a second threaded fastener.

[0017] As a preferred embodiment of the above-mentioned compression assembly, a sealing layer is provided between the first intermediate plate and the cylinder.

[0018] As a preferred technical solution of the above-mentioned compression assembly, there are two first intermediate plates, the cylinder is sandwiched between the two first intermediate plates, the first bosses of the two first intermediate plates are inserted into the same compression chamber, and the piston is located between the two first bosses in the axial direction of the crankshaft.

[0019] A rotary compressor is also provided, including the compression assembly described above.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a compression assembly, including a crankshaft and a piston. The piston is sleeved on the eccentric part of the crankshaft. It also includes a cylinder head, a cylinder, and a first intermediate plate, all sleeved on and rotatably connected to the crankshaft. Two cylinder heads are provided, spaced apart from and fixed relative to each other along the crankshaft axis. The cylinder is located between the two cylinder heads and has a compression chamber. The piston is placed within the compression chamber. An intake port is formed on the side wall of the cylinder along a direction perpendicular to the crankshaft axis, with one end of the intake port connected to the compression chamber. The first intermediate plate is located on one side of the cylinder along the crankshaft axis and is fixed relative to the cylinder. A first boss is provided on the axial end face of the first intermediate plate on the crankshaft. The first boss is inserted into the compression chamber, and within the compression chamber, the first boss and the piston are sequentially arranged along the crankshaft axis.

[0022] For example, two cylinder heads are provided, referred to as the first cylinder head and the second cylinder head respectively. The first cylinder head and the second cylinder head are fixed relative to each other and spaced apart along the axis of the crankshaft. A first intermediate plate has a first boss protruding along the axial direction of the crankshaft. The first boss is inserted into the compression chamber of the cylinder. In the compression chamber, the first boss and the piston are arranged along the axial direction of the crankshaft. Let the axial dimension of the compression chamber in the crankshaft be H, the axial dimension of the first boss in the crankshaft be H1, and the axial dimension of the piston in the crankshaft be H2, satisfying that H1 + H2 ≤ H. Thus, the axial dimension of the cylinder relative to the crankshaft is H. However, since the first boss is inserted into the compression chamber, the height of the area in the compression chamber used for piston movement is the difference between H and H1. The operating cylinder height is reduced to achieve the same displacement. The relative eccentricity of the rotor ψ = e / R increases, where e is the rotor eccentricity and R is the cylinder radius. The cylinder volume utilization rate K = ψ × (ψ - 2) increases. After the cylinder is disassembled, the height of a single cylinder is still H. The height of a single cylinder is higher than H - H1. In this way, the diameter φD of the intake port on the single cylinder can be made larger during processing, which can reduce intake resistance and improve compressor performance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 This is a front view of the compression component provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the compression assembly (excluding the cylinder) provided in this embodiment of the utility model;

[0026] Figure 3This is an isometric view of the compression assembly (excluding the cylinder head) provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the first intermediate plate provided in this embodiment of the utility model;

[0028] Figure 5 This is a top view of the compression assembly (excluding the cylinder head) provided in an embodiment of this utility model;

[0029] Figure 6 This is a top view of the cylinder provided in an embodiment of this utility model.

[0030] In the picture:

[0031] 1. Crankshaft; 2. Piston;

[0032] 3. Cylinder head; 3a. First cylinder head; 3b. Second cylinder head;

[0033] 4. Cylinder; 4a. First cylinder; 4b. Second cylinder; 41. Compression chamber; 42. Intake port;

[0034] 5. First intermediate plate; 51. First boss. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] like Figures 1 to 6 As shown, this utility model provides a compression assembly, including a crankshaft 1 and a piston 2. The piston 2 is sleeved on the eccentric part of the crankshaft 1. It also includes a cylinder head 3, a cylinder 4, and a first intermediate plate 5, which are sleeved on the crankshaft 1 and rotatably connected to the crankshaft 1. There are two cylinder heads 3, which are spaced apart from and fixed relative to each other on the axis of the crankshaft 1. The cylinder 4 is located between the two cylinder heads 3 and has a compression chamber 41. The piston 2 is placed in the compression chamber 41. The side wall of the cylinder 4 has an intake port 42 in a direction perpendicular to the axis of the crankshaft 1. One end of the intake port 42 is connected to the compression chamber 41. The first intermediate plate 5 is located on one side of the cylinder 4 on the axis of the crankshaft 1 and is fixed relative to the cylinder 4. The first intermediate plate 5 has a first boss 51 on the axial end face of the crankshaft 1. The first boss 51 is inserted into the compression chamber 41. In the compression chamber 41, the first boss 51 and the piston 2 are arranged sequentially along the axis of the crankshaft 1.

[0040] For example, two cylinder heads 3 are provided, referred to as the first cylinder head 3a and the second cylinder head 3b respectively. The first cylinder head 3a and the second cylinder head 3b are fixed relative to each other and spaced apart along the axis of the crankshaft 1. The first intermediate plate 5 has a first boss 51 protruding from the crankshaft 1 along its axial direction. The first boss 51 is inserted into the compression chamber 41 of the cylinder 4. In the compression chamber 41, the first boss 51 and the piston 2 are arranged along the axial direction of the crankshaft 1. Let the axial dimension of the compression chamber 41 in the crankshaft 1 be H, the axial dimension of the first boss 51 in the crankshaft 1 be H1, and the axial dimension of the piston 2 in the crankshaft 1 be H2, satisfying that H1 + H2 ≤ H. Thus, the axial dimension of cylinder 4 relative to crankshaft 1 is H. However, since the first boss 51 is inserted into the compression chamber 41, the height of the area in the compression chamber 41 used for piston 2 movement is the difference between H and H1. The height of cylinder 4 is reduced to achieve the same displacement. The relative eccentricity of the rotor ψ = e / R increases, where e is the rotor eccentricity and R is the radius of cylinder 4. The volume utilization rate of cylinder 4 K = ψ × (ψ - 2) increases. After cylinder 4 is disassembled, the height of a single cylinder 4 is still H. The height of a single cylinder 4 is higher than H - H1. In this way, the diameter φD of the intake port 42 on the single cylinder 4 can be made larger during processing, which can reduce intake resistance and improve compressor performance.

[0041] Optionally, there are two cylinders 4, which are located between two cylinder heads 3 and fixed relative to the cylinder heads 3. The first intermediate plate 5 is sandwiched between the two cylinders 4 and fixed relative to the cylinders 4. The first intermediate plate 5 is provided with a first boss 51 on each of the two axial end faces of the crankshaft 1. The first boss 51 is inserted into the compression chamber 41 on the corresponding side in the axial direction of the crankshaft 1.

[0042] For example, there are two cylinders 4, referred to as the first cylinder 4a and the second cylinder 4b, respectively. The first cylinder 4a has a first compression chamber, and the second cylinder 4b has a second compression chamber. The first intermediate plate 5 has a first boss A protruding from one end face and a first boss B protruding from the other end face along the axial direction of the crankshaft 1. Along the axial direction of the crankshaft 1, the first cylinder head 3a, the first cylinder 4a, the first intermediate plate 5, the second cylinder 4b, and the second cylinder head 3b are arranged sequentially. The lower end face of the first cylinder head 3a, the first cylinder 4a, and the upper end face of the first intermediate plate 5 enclose a relatively closed first compression chamber, and the upper end face of the second end cover, the second cylinder 4b, and the lower end face of the first intermediate plate 5 enclose a relatively closed second compression chamber. The first boss A of the first intermediate plate 5 is inserted into the first compression chamber, and the first boss B is inserted into the second compression chamber.

[0043] Adaptively, two pistons 2 are fitted on the crankshaft 1, referred to as the first piston and the second piston respectively. The first piston and the second piston are arranged sequentially along the axis of the crankshaft 1, wherein the first piston is located in the first compression chamber and the second piston is located in the second compression chamber.

[0044] Optionally, the compression assembly also includes a second intermediate plate. Two second intermediate plates are provided, located between the two cylinder heads 3, and each cylinder 4 is sandwiched between the first intermediate plate 5 and the second intermediate plate. A second boss is provided on the side of the second intermediate plate facing away from the cylinder head 3. The second boss is inserted into the compression chamber 41, and the piston 2 is located between the first boss 51 and the second boss.

[0045] For example, two intermediate plates are provided, referred to as the second intermediate plate A and the second intermediate plate B respectively. Along the axial direction of the crankshaft 1, the first cylinder head 3a, the second intermediate plate A, the first cylinder 4a, the first intermediate plate 5, the second cylinder 4b, the second intermediate plate B and the second cylinder head 3b are arranged in sequence. The lower end face of the second intermediate plate A, the first cylinder 4a and the upper end face of the first intermediate plate 5 enclose a relatively sealed first compression chamber. In the first compression chamber, the second boss, the first piston and the first boss A are arranged in sequence along the axial direction of the crankshaft 1. The lower end face of the first intermediate plate 5, the second cylinder 4b and the second intermediate plate B enclose a relatively sealed second compression chamber. In the second compression chamber, the first boss B, the second piston and the second boss are arranged in sequence along the axial direction of the crankshaft 1.

[0046] Optionally, cylinder 4 is connected to the second intermediate plate via a third threaded fastener. This arrangement facilitates assembly between cylinder 4 and the second intermediate plate.

[0047] Optionally, a sealing layer is provided between the second intermediate plate and the cylinder head 3; and / or, a sealing layer is provided between the second intermediate plate and the cylinder 4. This arrangement makes the sealing of the compression assembly more reliable.

[0048] Optionally, the cylinder head 3 and the cylinder 4 are connected by a first threaded fastener. This arrangement facilitates the assembly of the cylinder head 3 and the cylinder 4.

[0049] Optionally, the cylinder 4 is connected to the first intermediate plate 5 via a second threaded fastener. This arrangement facilitates the assembly of the cylinder 4 and the first intermediate plate 5.

[0050] Optionally, a sealing layer is provided between the first intermediate plate 5 and the cylinder 4.

[0051] This design makes the sealing of the compression components more reliable.

[0052] Optionally, there are two first intermediate plates 5, and the cylinder 4 is sandwiched between the two first intermediate plates 5. The first bosses 51 of the two first intermediate plates 5 are inserted into the same compression chamber 41. In the axial direction of the crankshaft 1, the piston 2 is located between the two first bosses 51.

[0053] For example, the compression assembly includes only one cylinder 4 and two first intermediate plates 5, which are respectively referred to as first intermediate plate A and first intermediate plate B. First intermediate plate A is sandwiched between the first cylinder head 3a and the cylinder 4. A first boss A is protruding on the side of the first intermediate plate A opposite to the first cylinder head 3a. The first boss A is inserted into the compression chamber 41. First intermediate plate B is sandwiched between the second cylinder head 3b and the cylinder 4. A first boss B is protruding on the side of the first intermediate plate B opposite to the second cylinder head 3b. The first boss B is inserted into the compression chamber 41. In the compression chamber 41, the first boss A, the piston 2 and the first boss B are arranged in sequence.

[0054] A rotary compressor is also provided, including the compression component described above.

[0055] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. Compression assembly comprising a crankshaft (1) and a piston (2) which is housed on an eccentric of the crankshaft (1), characterized in that, It also includes a sleeve fitted onto the crankshaft (1) and rotatably connected to the crankshaft (1): Cylinder head (3), two cylinder heads (3) are provided, and the two cylinder heads (3) are spaced apart from and fixed relative to each other on the axis of the crankshaft (1); Cylinder (4), the cylinder (4) is located between the two cylinder heads (3), the cylinder (4) has a compression chamber (41), the piston (2) is placed in the compression chamber (41), the side wall of the cylinder (4) has an intake port (42) in a direction perpendicular to the axis of the crankshaft (1), and one end of the intake port (42) is connected to the compression chamber (41); The first intermediate plate (5) is located on one side of the cylinder (4) on the axis of the crankshaft (1) and is fixed relative to the cylinder (4). The first intermediate plate (5) has a first boss (51) on the axial end face of the crankshaft (1). The first boss (51) is inserted into the compression chamber (41). In the compression chamber (41), the first boss (51) and the piston (2) are arranged sequentially along the axis of the crankshaft (1).

2. The compression assembly of claim 1, wherein, Two cylinders (4) are provided, and the two cylinders (4) are located between the two cylinder heads (3) and are fixed relative to the cylinder heads (3). The first intermediate plate (5) is sandwiched between the two cylinders (4) and is fixed relative to the cylinders (4). The first intermediate plate (5) is provided with the first boss (51) on both axial end faces of the crankshaft (1). The first boss (51) is inserted into the compression cavity (41) on the corresponding side in the axial direction of the crankshaft (1).

3. The compression assembly of claim 2, wherein, It also includes a second intermediate plate, of which two are provided. The two second intermediate plates are located between the two cylinder heads (3), and each cylinder (4) is sandwiched between the first intermediate plate (5) and the second intermediate plate. A second boss is provided on the side of the second intermediate plate facing away from the cylinder head (3). The second boss is inserted into the compression chamber (41), and the piston (2) is located between the first boss (51) and the second boss.

4. The compression assembly of claim 3, wherein, The cylinder (4) is connected to the second intermediate plate by a third threaded fastener.

5. The compression assembly according to claim 3, characterized in that, A sealing layer is provided between the second intermediate plate and the cylinder head (3); And / or, a sealing layer is provided between the second intermediate plate and the cylinder (4).

6. The compression assembly according to claim 1, characterized in that, The cylinder head (3) and the cylinder (4) are connected by a first threaded fastener.

7. The compression assembly according to claim 1, characterized in that, The cylinder (4) is connected to the first intermediate plate (5) by a second threaded fastener.

8. The compression assembly according to claim 7, characterized in that, A sealing layer is provided between the first intermediate plate (5) and the cylinder (4).

9. The compression assembly according to claim 1, characterized in that, There are two first intermediate plates (5), and the cylinder (4) is sandwiched between the two first intermediate plates (5). The first bosses (51) of the two first intermediate plates (5) are inserted into the same compression chamber (41). In the axial direction of the crankshaft (1), the piston (2) is located between the two first bosses (51).

10. A rotary compressor, characterized in that, Includes the compression component as described in any one of claims 1-9.

Images