compressor

Abstract

The present application relates to the technical field of compressor, provide a kind of compressor, the bottom of shell forms oil pool;Upper cylinder cover and lower cylinder cover are installed in shell, and upper cylinder cover is located in the side of lower cylinder cover facing away from oil pool;Cylinder body is clamped between upper cylinder cover and lower cylinder cover;Crankshaft is inserted in upper cylinder cover and lower cylinder cover and can rotate, part of crankshaft can be inserted into oil pool, piston moves in cylinder body under the drive of crankshaft;First intercepting member is arranged in the side of upper cylinder cover facing away from lower cylinder cover, first intercepting member is provided with first air hole, first avoiding hole and first backflow hole, the aperture d of first air hole ≤d0, d0 is the diameter of oil particle. First intercepting member can allow gaseous refrigerant to discharge, intercept oil entrained, and can allow escaped oil to backflow, so that the oil level in oil pool can be kept stable, to maintain the overall lubrication effect inside, improve stability.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to a compressor. Background Technology

[0002] In current conventional applications of rotary compressors, there is a certain demand for compressors with low-oil or thin-oil operation. Appropriately reducing the amount of oil added to the compressor can decrease the system's oil retention rate, thereby improving system performance. Simultaneously, to ensure normal oil pumping lubrication of the compressor while reducing the amount of oil added, it is necessary to maintain the compressor oil level as high as possible to guarantee normal pumping capacity. Therefore, reducing the compressor's oil output rate and ensuring a healthy oil level during compressor operation has become a major research direction.

[0003] Currently, common methods for reducing oil extraction rate in compressors include the following: Incorporating a structure in the upper chamber of the motor to alter the direction and speed of the refrigerant carrying the oil, allowing gravity to separate the oil from the refrigerant and reduce the oil extraction rate; or modifying the compressor structure in the upper chamber of the motor to separate the refrigerant from the oil, thereby reducing the oil extraction rate; or altering the stator shavings to separate the oil from the refrigerant as it moves upwards, while also allowing the separated oil in the upper chamber to flow back to the lower oil sump more effectively. These methods primarily focus on the motor or the upper chamber of the motor. Adding or altering certain structures to reduce oil extraction rate is mainly applied during the steady-state operation of the compressor. However, experimental observations show that during certain non-steady-state operation phases of the compressor, such as the startup phase (the first ten minutes of startup) under harsh conditions, microscopic examination of the oil sump reveals violent boiling and a rapid drop in the oil level in the lower oil sump. The refrigerant dissolved in the oil evaporates from the oil sump, carrying away a large amount of oil and moving upwards, causing the oil level to drop and severely affecting the lubrication of the compressor.

[0004] Therefore, there is an urgent need for a compressor to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a compressor that can maintain a stable oil level in the oil sump even when it is in a non-steady-state start-up phase.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Compressor, including:

[0008] The shell, with an oil pool formed at its bottom;

[0009] An upper cylinder head and a lower cylinder head are installed inside the housing, with the upper cylinder head located on the side of the lower cylinder head facing away from the oil sump.

[0010] Cylinder block, wherein the cylinder block is sandwiched between the upper cylinder head and the lower cylinder head;

[0011] A crankshaft and a piston, wherein the crankshaft passes through the upper cylinder head and the lower cylinder head and is rotatable, and a portion of the crankshaft can be inserted into the oil sump, and the piston moves within the cylinder body under the drive of the crankshaft.

[0012] The first interceptor is disposed on the side of the upper cylinder head opposite to the lower cylinder head. The first interceptor has a first vent hole, a first clearance hole and a first return hole. The diameter of the first vent hole is d≤d0, where d0 is the diameter of the oil particles.

[0013] As a preferred technical solution for the aforementioned compressor, a plurality of first return holes are provided. The sum of the opening areas S1 of the plurality of first return holes, projected onto the axial direction of the crankshaft, satisfies that S1 ≤ 0.15S 总1 S 总1 This refers to the total area of ​​the first interceptor mentioned above.

[0014] As a preferred technical solution for the above-mentioned compressor, the first interceptor is connected to the upper cylinder head by a threaded fastener, which is inserted into the skirt of the upper cylinder head; or, the first interceptor is welded and fixed to the inner peripheral wall of the housing.

[0015] As a preferred technical solution of the above-mentioned compressor, it further includes a second interceptor. The oil sump is disposed at the lower cover of the housing. The second interceptor is disposed between the cylinder and the lower cover. The second interceptor has a second vent hole and a second return hole. The diameter d2 of the second vent hole satisfies d2≤d0.

[0016] As a preferred embodiment of the compressor described above, a plurality of second return holes are provided. The sum of the openings S2 of the plurality of second return holes, projected onto the axial direction of the crankshaft, satisfies the condition that S2 ≤ 0.1S. 总2 S 总2 This refers to the total area of ​​the second interceptor mentioned above.

[0017] As a preferred embodiment of the aforementioned compressor, the second interceptor is positioned at a distance H from the lower housing cover along the axial direction of the crankshaft, satisfying that H... 下 ≤H≤H 气 H 下 H is the distance between the lower cylinder head and the lower housing cover. 气 This refers to the distance between the lower end face of the cylinder block and the aforementioned lower cover.

[0018] As a preferred technical solution for the compressor, the second interceptor is welded and fixed to the inner peripheral wall of the housing.

[0019] As a preferred embodiment of the compressor, a second clearance hole is provided at the center of the second interceptor, and the diameter of the second clearance hole is D1, D1-D 下 = △D, 0 ≤ △D ≤ 2mm, D 下 This refers to the diameter of the lower cylinder head mentioned above.

[0020] As a preferred technical solution for the compressor, the first return hole and the second return hole are staggered in the axial projection of the crankshaft.

[0021] As a preferred technical solution of the compressor, the first return hole is opened in the middle of the first interceptor, the circumferential edge of the first interceptor forms a first platform, the middle of the first interceptor forms a second platform, the first platform and the second platform are connected by a guide surface, and under the action of gravity, the oil can flow from the first platform to the second platform and pass through the first return hole.

[0022] Beneficial effects of this invention:

[0023] This invention provides a compressor, comprising a housing, an upper end cover, a lower end cover, a cylinder body, a crankshaft, a piston, and a first interceptor. The bottom of the housing forms an oil sump; an upper cylinder cover and a lower cylinder cover are installed within the housing, with the upper cylinder cover located on the side of the lower cylinder cover opposite to the oil sump; the cylinder body is sandwiched between the upper and lower cylinder covers; the crankshaft passes through the upper and lower cylinder covers and is rotatable, with a portion of the crankshaft capable of being inserted into the oil sump; the piston moves within the cylinder body under the drive of the crankshaft; the first interceptor is located on the side of the upper cylinder cover opposite to the lower cylinder cover, and the first interceptor has a first vent hole, a first clearance hole, and a first return hole, wherein the diameter of the first vent hole is d≤d0, where d0 is the diameter of the oil particles.

[0024] With this design, the first clearance hole is used to allow clearance for the bolts connecting the upper cylinder head and the cylinder, or for clearance for the crankshaft. When the crankshaft starts and begins to rotate around its axis, the oil sump will violently churn during the unstable startup phase. The refrigerant evaporates and vaporizes, carrying a large amount of oil upwards and escaping from the oil sump. When the gaseous refrigerant passes the first interceptor during its ascent, the diameter of the first vent hole in the first interceptor is smaller than the diameter of the oil particles. Therefore, only the gaseous refrigerant is allowed to pass through, while the oil it carries is intercepted. After the oil collects into droplets, it falls back into the oil sump, allowing the escaped oil to flow back. This maintains the stability of the oil level in the oil sump, thereby maintaining the overall internal lubrication effect and improving stability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the internal structure of the compressor provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the first interceptor provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the second interceptor provided in an embodiment of the present invention.

[0029] In the picture:

[0030] 110. Shell body; 120. Lower shell cover; 130. Oil tank;

[0031] 210. Upper cylinder head; 220. Lower cylinder head;

[0032] 300. Cylinder block;

[0033] 410. Crankshaft; 420. Piston;

[0034] 500, First interceptor; 510, First vent; 520, First return vent; 530, First clearance vent; 540, Insertion vent;

[0035] 600, Second interceptor; 610, Second vent; 620, Second return vent; 630, Second clearance vent. Detailed Implementation

[0036] 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 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, and not all of the structures.

[0037] In the description of this invention, 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 invention based on the specific circumstances.

[0038] 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 being 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 being 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.

[0039] 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0040] like Figures 1 to 3 As shown, the present invention provides a compressor, including a housing, an upper end cover, a lower end cover 120, a cylinder 300, a crankshaft 410, a piston 420, and a first interceptor 500. The bottom of the housing forms an oil sump 130; the upper cylinder head 210 and the lower cylinder head 220 are installed inside the housing, with the upper cylinder head 210 located on the side of the lower cylinder head 220 facing away from the oil sump 130; the cylinder body 300 is sandwiched between the upper cylinder head 210 and the lower cylinder head 220; the crankshaft 410 passes through the upper cylinder head 210 and the lower cylinder head 220 and is rotatable, with a portion of the crankshaft 410 able to be inserted into the oil sump 130; the piston 420 moves within the cylinder body 300 under the drive of the crankshaft 410; the first interceptor 500 is disposed on the side of the upper cylinder head 210 facing away from the lower cylinder head 220, and the first interceptor 500 has a first vent hole 510, a first clearance hole 530 and a first return hole 520, with the diameter of the first vent hole 510 being d≤d0, where d0 is the diameter of the oil particles.

[0041] With this configuration, the first clearance hole 530 is used to allow clearance for the bolts connecting the upper cylinder head 210 to the cylinder, or for clearance for the crankshaft 410. When the crankshaft 410 starts and begins to rotate around its axis, the oil sump 130 will violently churn during the unstable start-up phase. The refrigerant evaporates and vaporizes, carrying a large amount of oil upwards and escaping out of the oil sump 130. When the gaseous refrigerant passes the first interceptor 500 during its ascent, the diameter of the first vent hole 510 of the first interceptor 500 is smaller than the diameter of the oil particles, thus allowing only the gaseous refrigerant to pass through while intercepting the oil it carries. After the oil collects into droplets, it falls back into the oil sump 130, and the escaped oil is allowed to flow back. This maintains the stability of the oil level in the oil sump 130, thereby maintaining the overall internal lubrication effect and improving stability.

[0042] For example, the first interceptor 500 is a mesh structure, the first vent 510 has N1 openings, and the first return hole 520 has M1 openings, satisfying 0 < M1 ≤ N1.

[0043] For example, multiple first vent holes 510 are provided, and the multiple first vent holes 510 are evenly distributed on the first interceptor 500. In this way, gaseous refrigerant can pass through, reducing the pressure in the oil sump 130.

[0044] For example, the upper cylinder head 210 has a waist-shaped hole, and the first oil return hole at least partially overlaps with the waist-shaped hole in the axial projection of the crankshaft 410. This reduces the resistance encountered during oil return.

[0045] For example, multiple first interceptors 500 are sequentially arranged along the axial direction of the crankshaft 410. In this way, the multiple interceptors 500 effectively intercept the oil, resulting in a significant interception effect.

[0046] For example, the first interceptor 500 is a metal component.

[0047] Optionally, a plurality of first return holes 520 are provided. The sum of the opening areas S1 of the plurality of first return holes 520 projected onto the axial direction of the crankshaft 410 satisfies that S1 ≤ 0.15S 总1 S 总1 The total area of ​​the first interceptor 500 is defined as follows. This design avoids the first return hole 520 having an excessively large total area, which would allow the gaseous refrigerant to carry a large amount of oil through the first interceptor 500. It also satisfies the need to facilitate the flow of gaseous refrigerant and reduce the pressure in the oil sump 130.

[0048] Optionally, the first interceptor 500 is welded to the inner peripheral wall of the housing. For example, the peripheral edge of the first interceptor 500 is welded to the peripheral edge of the housing body 110.

[0049] Optionally, the first interceptor 500 is connected to the upper cylinder head 210 by a threaded fastener, which is inserted into the skirt of the upper cylinder head 210.

[0050] For example, the peripheral edge of the first interceptor 500 is provided with a plug hole 540, and the skirt of the upper cylinder head 210 is provided with a threaded hole. The threaded fastener is inserted into the plug hole 540 and the threaded hole in sequence along the axial direction of the crankshaft 410 and is threadedly connected to the upper cylinder head 210. The first interceptor 500 is clamped between the nut of the threaded fastener and the skirt of the upper cylinder head 210.

[0051] Thus, by positioning the threaded fastener at the skirt edge of the upper cylinder head 210, the flow of gaseous refrigerant can be avoided. Furthermore, the threaded fastener connection facilitates disassembly and replacement.

[0052] Optionally, the compressor also includes a second interceptor 600. The oil sump 130 is disposed at the lower cover 120 of the housing. The second interceptor 600 is disposed between the cylinder 300 and the lower cover 120. The second interceptor 600 has a second vent hole 610 and a second return hole 620. The diameter d2 of the second vent hole 610 satisfies d2≤d0.

[0053] For example, the housing includes a main body 110 and a lower cover 120, with the main body 110 and the lower cover 120 connected. A portion of the main body 110 and the lower cover 120 is used to hold oil, forming an oil sump 130. A second interceptor 600 is located between the cylinder body 300 and the lower cover 120, and it has a second vent 610 with a diameter smaller than the diameter of oil particles, preventing oil particles from passing through and intercepting the oil while allowing gaseous refrigerant to pass through; a second return hole 620 allows the oil to return to the oil sump 130.

[0054] For example, the second interceptor 600 is a mesh structure, the second vent 610 has N2 openings, and the second return hole 620 has M2 openings, satisfying 0 < M2 ≤ N2.

[0055] For example, multiple second vent holes 610 are provided, and the multiple second vent holes 610 are evenly distributed on the second interceptor 600. In this way, it is convenient for gaseous refrigerant to pass through and reduce the pressure in the oil sump 130.

[0056] For example, the upper cylinder head 210 has a waist-shaped hole, which, when projected axially onto the crankshaft 410, at least partially overlaps with the second oil return hole. This reduces resistance during the oil return stroke.

[0057] For example, multiple second interceptors 600 are sequentially arranged along the axial direction of the crankshaft 410. In this way, the multiple interceptors 600 effectively intercept the oil, resulting in a significant interception effect.

[0058] For example, the second interceptor 600 is a metal component.

[0059] Optionally, a plurality of second return holes 620 are provided. The sum of the openings S2 of the plurality of second return holes 620 projected onto the axial direction of the crankshaft 410 satisfies S2≤0.1S 总2 S 总2 The total area of ​​the second interceptor 600.

[0060] This design avoids the situation where the total area of ​​the second return hole 620 is too large, which would allow the gaseous refrigerant to carry a large amount of oil through the second interceptor 600. It also satisfies the need to conduct gaseous refrigerant and reduce the pressure in the oil sump 130.

[0061] Optionally, along the axial direction of the crankshaft 410, the second interceptor 600 is positioned at a distance H from the lower housing cover 120, satisfying H 下 ≤H≤H 气 H 下 H is the distance between the lower cylinder head 220 and the lower housing cover 120. 气 This is the distance between the lower end face of the cylinder block 300 and the lower cover 120.

[0062] Optionally, the second interceptor 600 is welded to the inner peripheral wall of the housing. For example, the peripheral edge of the second interceptor 600 is welded to the peripheral edge of the housing body 110.

[0063] Optionally, a second clearance hole 630 is provided at the center of the second interceptor 600, the diameter of the second clearance hole 630 being D1, D1-D 下 = △D, 0 ≤ △D ≤ 2mm, D 下 The diameter is the diameter of the lower cylinder head 220. This facilitates the insertion of the lower cylinder head 220 into the second interceptor 600. The gap between the lower cylinder head 220 and the second interceptor 600 can prevent the lower cylinder head 220 and the second interceptor 600 from being squeezed during installation, which would cause deformation of the second return hole 620 and / or the second vent hole 610 on the second interceptor 600.

[0064] Optionally, the first return hole 520 and the second return hole 620 are staggered in projection onto the axial direction of the crankshaft 410. This arrangement ensures that the gaseous refrigerant carrying oil always passes through the first interceptor 500 and / or the second interceptor 600, preventing the oil from smoothly escaping from the oil sump 130.

[0065] Optionally, the first return hole 520 is opened in the middle of the first interceptor 500. The circumferential edge of the first interceptor 500 forms a first platform, and the middle of the first interceptor 500 forms a second platform. The first platform and the second platform are connected by a guide surface. Under the action of gravity, the oil can flow from the first platform to the second platform and pass through the first return hole 520.

[0066] In this way, the returned oil droplets, after falling onto the first interceptor 500, can automatically converge at the location of the first return hole 520 under the action of gravity, and return to the oil pool 130 through the first return hole 520, thus preventing the oil from staying on the first interceptor 500 and blocking the first vent hole 510.

[0067] 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 scope of protection 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. Compressor, characterized in that, The application relates to a refrigeration compressor, which comprises the following components: a housing, a bottom of the housing forming an oil pool (130); an upper cylinder cover (210) and a lower cylinder cover (220), the upper cylinder cover (210) and the lower cylinder cover (220) being installed in the housing, and the upper cylinder cover (210) being located on a side of the lower cylinder cover (220) facing away from the oil pool (130); a cylinder body (300) clamped between the upper cylinder cover (210) and the lower cylinder cover (220); a crankshaft (410) penetrating through the upper cylinder cover (210) and the lower cylinder cover (220) and capable of rotating, part of the crankshaft (410) being capable of being inserted into the oil pool (130), and a piston (420) moving in the cylinder body (300) under the drive of the crankshaft (410); a first intercepting piece (500) arranged on a side of the upper cylinder cover (210) facing away from the lower cylinder cover (220), the first intercepting piece (500) being provided with a first air passage (510), a first avoiding hole (530) and a first backflow hole (520), the first air passage (510) having a hole diameter d less than d0, d0 being the diameter of oil particles, the hole diameter of the first air passage (510) of the first intercepting piece (500) being less than the diameter of oil particles, so that only gaseous refrigerant is allowed to pass through, and oil entrained by the gaseous refrigerant is intercepted; A second intercepting member (600) is arranged between the cylinder body (300) and the lower shell cover (120), and the second intercepting member (600) is provided with a second air passage (610) and a second backflow hole (620), wherein the diameter d2 of the second air passage (610) satisfies d2≤d 0； in the projection of the crankshaft (410) in the axial direction, the first backflow hole (520) and the second backflow hole (620) are arranged alternately.

2. The compressor of claim 1, wherein, The first backflow hole (520) is provided with a plurality of openings, and the sum S1 of the opening areas of the plurality of first backflow holes (520) satisfies S1≤0.15S 总1 , S 总1 is the total area of the first interception member (500).

3. The compressor of claim 2, wherein, The first intercepting piece (500) and the upper cylinder cover (210) are connected through a threaded fastener, the threaded fastener being inserted into a skirt position of the upper cylinder cover (210); alternatively, the first intercepting piece (500) and the inner circumferential wall of the housing are welded and fixed.

4. The compressor of claim 1, wherein, The second backflow hole (620) is provided with a plurality of openings, and the sum S2 of the openings of the plurality of second backflow holes (620) satisfies S2≤0.1S 总2 , S 总2 is the total area of the second intercepting member (600).

5. The compressor of claim 1, wherein, In the axial direction of the crankshaft (410), the second intercepting member (600) is arranged at a distance H from the lower shell cover (120), satisfying H 下 ≤ H ≤ H 气 , H 下 is the distance between the lower cylinder cover (220) and the lower shell cover (120), H 气 is the distance between the lower end surface of the cylinder block (300) and the lower shell cover (120).

6. The compressor of claim 1, wherein, The second intercepting piece (600) and the inner circumferential wall of the housing are welded and fixed.

7. The compressor of claim 1, wherein The second intercepting piece (600) is provided with a second avoiding hole (630) in the center position, the diameter D1 of the second avoiding hole (630) is D1-D 下 =△D, 0≤△D≤2mm, D 下 is the diameter of the lower cylinder cover (220).

8. The compressor of any one of claims 1-7, wherein, The first backflow hole (520) is arranged in the middle of the first intercepting piece (500), the circumferential edge of the first intercepting piece (500) forming a first platform, the middle of the first intercepting piece (500) forming a second platform, the first platform and the second platform being connected through a guide surface, under the action of gravity, oil can flow from the first platform to the second platform and pass through the first backflow hole (520).

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