Compressor

Abstract

The invention relates to the technical field of compressors, and provides a compressor. An oil pool is formed in the bottom of a shell; the upper cylinder cover and the lower cylinder cover are installed in the shell, and the upper cylinder cover is located on the side, back to the oil pool, of the lower cylinder cover. The cylinder body is clamped between the upper cylinder cover and the lower cylinder cover; the crankshaft penetrates through the upper cylinder cover and the lower cylinder cover and can rotate, part of the crankshaft can be inserted into the oil pool, and the piston is driven by the crankshaft to move in the cylinder body; the first intercepting piece is arranged on the side, back to the lower cylinder cover, of the upper cylinder cover, a first air hole, a first avoiding hole and a first backflow hole are formed in the first intercepting piece, the hole diameter d of the first air hole is smaller than or equal to d0, and d0 is the diameter of oil particles. The first intercepting part can allow the gaseous refrigerant to be discharged, intercept the wrapped oil liquid and allow the escaped oil liquid to flow back, so that the liquid level of the oil liquid in the oil pool can be kept stable, the overall lubricating effect inside the oil pool is further maintained, and the stability is improved.

Description

Technical Field

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

[0002] At present, there is a certain demand for low-oil compressor products in the conventional application field of rotary compressors. Appropriately reducing the amount of oil added to the compressor can reduce the system oil storage rate, thereby improving system performance. At the same time, in order to ensure the normal oil pumping lubrication of the compressor when the amount of oil is reduced, it is necessary to ensure that the compressor oil level is kept at a high level as much as possible to ensure normal oil pumping capacity. Based on this, reducing the oil output rate of the compressor to ensure that the oil level is at a healthy height during the operation of the compressor has become the main research direction.

[0003] At present, the common solutions to reduce the oil output rate of compressors are mainly in the following forms: setting a certain structure in the upper cavity of the motor to change the movement direction and speed of the refrigerant entrained with oil, and separating the oil from the refrigerant through gravity and other effects to reduce the oil output rate; or changing a certain compressor structure in the upper cavity of the motor to separate the refrigerant moving to the upper cavity of the compressor from the oil, thereby reducing the oil output rate; or changing the cutting edge form of the motor stator to separate the oil from the refrigerant in the process of moving upward, and changing the stator cutting edge at the same time can also make the oil separated in the upper cavity of the motor flow back to the oil pool below better. The above forms of reducing the oil output rate are mainly concentrated in the motor or the upper cavity of the motor. The addition or change of a certain structure to reduce the oil output rate is mainly used in the steady-state operation stage of the compressor. However, through experimental observations, in some non-steady-state operation stages of the compressor, such as the startup stage of the compressor in a relatively harsh environment (ten minutes before startup), it was observed through the oil pool test mirror that the oil pool below the compressor boiled violently and the liquid level dropped rapidly. The refrigerant dissolved in the oil evaporates from the oil pool and carries away a large amount of oil, which moves upward, causing the oil level to drop and causing serious impact on the lubrication of the compressor.

[0004] Therefore, a compressor is urgently needed to solve the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a compressor which can keep the oil level in the oil pool stable when the compressor is in a non-steady-state startup phase.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Compressor, including:

[0008] A shell, wherein the bottom of the shell forms an oil pool;

[0009] An upper cylinder cover and a lower cylinder cover, wherein the upper cylinder cover and the lower cylinder cover are installed in the housing, and the upper cylinder cover is located on a side of the lower cylinder cover facing away from the oil pool;

[0010] A cylinder body, the cylinder body being sandwiched between the upper cylinder head and the lower cylinder head;

[0011] A crankshaft and a piston, wherein the crankshaft is inserted through the upper cylinder head and the lower cylinder head and is rotatable, a portion of the crankshaft is insertable into the oil pool, and the piston moves in the cylinder body under the drive of the crankshaft;

[0012] The first intercepting member is arranged on the side of the upper cylinder head facing away from the lower cylinder head. The first intercepting member is provided with a first air hole, a first avoidance hole and a first reflux hole. The aperture of the first air hole is d≤d0, where d0 is the diameter of the oil particles.

[0013] As a preferred technical solution of the above compressor, the above first reflow holes are provided with a plurality of holes, and the sum of the opening areas of the plurality of the above first reflow holes in the axial projection of the above crankshaft S1 satisfies, S1≤0.15S 总1 , S 总1 is the total area of ​​the first intercepting member.

[0014] As a preferred technical solution of the above-mentioned compressor, the above-mentioned first intercepting member is connected to the above-mentioned upper cylinder cover via a threaded fastener, and the above-mentioned threaded fastener is inserted into the skirt position of the above-mentioned upper cylinder cover; or, the above-mentioned first intercepting member is welded and fixed to the inner circumferential wall of the above-mentioned shell.

[0015] As a preferred technical solution for the above-mentioned compressor, it also includes a second intercepting member. The above-mentioned oil pool is arranged at the lower shell cover of the above-mentioned shell. The above-mentioned second intercepting member is arranged between the above-mentioned cylinder body and the above-mentioned lower shell cover. The above-mentioned second intercepting member is provided with a second air hole and a second reflux hole. The aperture d2 of the above-mentioned second air hole satisfies d2≤d0.

[0016] As a preferred technical solution of the compressor, the second reflow holes are provided in plurality, and the sum of the openings of the plurality of second reflow holes in the axial projection of the crankshaft satisfies S2, S2≤0.1S 总2 , S 总2 is the total area of ​​the second interceptor.

[0017] As a preferred technical solution of the above compressor, in the axial direction of the above crankshaft, the above second intercepting member is arranged at a distance H from the above lower shell cover, satisfying that H 下 ≤H≤H 气 , H 下 H is the distance between the lower cylinder head and the lower shell cover, 气 It is the distance between the lower end surface of the cylinder body and the above-mentioned lower shell cover.

[0018] As a preferred technical solution of the above compressor, the second intercepting member is fixed to the inner peripheral wall of the shell by welding.

[0019] As a preferred technical solution of the above compressor, a second avoidance hole is opened at the center of the above second interception member, and the diameter of the above second avoidance hole is D1, D1-D 下 =△D, 0≤△D≤2mm, D 下 is the diameter of the lower cylinder head.

[0020] As a preferred technical solution of the compressor, in the axial projection of the crankshaft, the first reflow hole and the second reflow hole are alternately arranged.

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

[0022] Beneficial effects of the present invention:

[0023] The present invention provides a compressor, comprising a shell, an upper end cover, a lower shell cover, a cylinder body, a crankshaft, a piston and a first intercepting member. The bottom of the shell forms an oil pool; the upper cylinder head and the lower cylinder head are installed in the shell, and the upper cylinder head is located on the side of the lower cylinder head facing away from the oil pool; the cylinder body is clamped between the upper cylinder head and the lower cylinder head; the crankshaft is passed through the upper cylinder head and the lower cylinder head and can rotate, a part of the crankshaft can be inserted into the oil pool, and the piston moves in the cylinder body under the drive of the crankshaft; the first intercepting member is arranged on the side of the upper cylinder head facing away from the lower cylinder head, and the first intercepting member is provided with a first air vent, a first avoidance hole and a first reflux hole, and the aperture d of the first air vent is ≤d0, where d0 is the diameter of the oil particles.

[0024] In this way, the first avoidance hole is used to avoid the bolts connecting the upper cylinder cover and the cylinder, or to avoid the crankshaft. When the crankshaft starts and begins to rotate around its axis, the oil pool will roll violently in the non-stable startup stage, and the refrigerant evaporates and gasifies, carrying a large amount of oil to escape from the oil pool. When the gaseous refrigerant passes through the first intercepting member on the way up, the aperture of the first air hole of the first intercepting member is smaller than the diameter of the oil particles, so only the gaseous refrigerant is allowed to pass through, and the oil it carries is intercepted. After the oil is gathered into droplets, it falls back into the oil pool, and the escaped oil can be allowed to flow back, so that the oil level in the oil pool can be kept stable, thereby maintaining the overall lubrication effect inside and improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

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

[0027] Figure 2 is a schematic structural diagram of a first intercepting member provided in an embodiment of the present invention;

[0028] Figure 3 It is a schematic structural diagram of a second intercepting member provided in an embodiment of the present invention.

[0029] In the figure:

[0030] 110, shell body; 120, lower shell cover; 130, oil pool;

[0031] 210, upper cylinder head; 220, lower cylinder head;

[0032] 300, cylinder body;

[0033] 410, crankshaft; 420, piston;

[0034] 500, first intercepting member; 510, first vent hole; 520, first reflux hole; 530, first avoidance hole; 540, plug-in hole;

[0035] 600, second intercepting member; 610, second air vent; 620, second reflux hole; 630, second avoidance hole. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] like Figures 1 to 3 As shown, the present invention provides a compressor, including a shell, an upper end cover, a lower shell cover 120, a cylinder block 300, a crankshaft 410, a piston 420 and a first intercepting member 500. An oil pool 130 is formed at the bottom of the shell; the upper cylinder head 210 and the lower cylinder head 220 are installed in the shell, and the upper cylinder head 210 is located on the side of the lower cylinder head 220 facing away from the oil pool 130; the cylinder body 300 is clamped between the upper cylinder head 210 and the lower cylinder head 220; the crankshaft 410 is passed through the upper cylinder head 210 and the lower cylinder head 220 and can rotate, and a part of the crankshaft 410 can be inserted into the oil pool 130, and the piston 420 moves in the cylinder body 300 driven by the crankshaft 410; the first intercepting member 500 is arranged on the side of the upper cylinder head 210 facing away from the lower cylinder head 220, and the first intercepting member 500 is provided with a first air hole 510, a first avoidance hole 530 and a first reflux hole 520, and the aperture d≤d0 of the first air hole 510, d0 is the diameter of the oil particles.

[0041] In this way, the first avoidance hole 530 is used to avoid the bolts connecting the upper cylinder head 210 and the cylinder, or to avoid the crankshaft 410. When the crankshaft 410 starts and begins to rotate around its axis, the oil pool 130 will roll violently in the non-stable startup stage, and the refrigerant evaporates and gasifies, carrying a large amount of oil and escaping from the oil pool 130. When the gaseous refrigerant passes through the first interceptor 500 on the way up, the aperture of the first air hole 510 of the first interceptor 500 is smaller than the diameter of the oil particles, so only the gaseous refrigerant is allowed to pass through, and the oil entrained by it is intercepted. After the oil is gathered into droplets, it falls back into the oil pool 130, and the escaped oil can be allowed to flow back, so that the oil level in the oil pool 130 can be kept stable, thereby maintaining the overall lubrication effect inside and improving stability.

[0042] Exemplarily, the first intercepting member 500 is a mesh structure, the number of the first vent holes 510 is N1, and the number of the first reflow holes 520 is M1, satisfying 0<M1≤N1.

[0043] Exemplarily, a plurality of first air holes 510 are provided, and the plurality of first air holes 510 are evenly distributed on the first intercepting member 500 . In this way, the gaseous refrigerant can pass through and the pressure in the oil pool 130 can be reduced.

[0044] For example, the upper cylinder cover 210 is provided with a waist-shaped hole, and in the axial projection of the crankshaft 410, the first oil return hole and the waist-shaped hole at least partially overlap, so as to reduce the resistance encountered when returning the oil.

[0045] Exemplarily, a plurality of first intercepting members 500 are sequentially arranged along the axial direction of the crankshaft 410. Thus, after multiple interceptions by the plurality of first intercepting members 500, the interception effect on the oil is obvious.

[0046] Exemplarily, the first intercepting member 500 is a metal member.

[0047] Optionally, a plurality of first reflow holes 520 are provided, and the sum of the areas of the plurality of first reflow holes 520 in the axial projection of the crankshaft 410 is S1, which satisfies S1≤0.15S 总1 , S 总1 is the total area of ​​the first intercepting member 500. This arrangement can avoid the first return hole 520 having a total area that is too large, causing the gaseous refrigerant to carry a large amount of oil through the first intercepting member 500, and can also meet the effect of conducting the gaseous refrigerant and reducing the pressure of the oil pool 130.

[0048] Optionally, the first intercepting member 500 is fixed to the inner peripheral wall of the shell by welding. Exemplarily, the peripheral edge of the first intercepting member 500 is fixed to the peripheral edge of the shell body 110 by welding.

[0049] Optionally, the first intercepting member 500 is connected to the upper cylinder cover 210 via a threaded fastener, and the threaded fastener is inserted into the skirt position of the upper cylinder cover 210 .

[0050] Exemplarily, a plug hole 540 is provided on the peripheral edge of the first intercepting member 500, and a threaded hole is provided on the skirt of the upper cylinder head 210. The threaded fastener is sequentially inserted into the plug hole 540 and the threaded hole along the axial direction of the crankshaft 410 and is threadedly connected to the upper cylinder head 210. The first intercepting member 500 is clamped between the nut of the threaded fastener and the skirt of the upper cylinder head 210.

[0051] In this way, the connection position of the threaded fastener is set at the skirt position of the upper cylinder cover 210, which can avoid the threaded fastener blocking the circulation of the gaseous refrigerant. In addition, the threaded fastener connection is convenient for disassembly and replacement.

[0052] Optionally, the compressor also includes a second intercepting member 600, the oil pool 130 is arranged at the lower shell cover 120 of the shell, the 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 hole 610 and a second reflux hole 620, and the aperture d2 of the second air hole 610 satisfies d2≤d0.

[0053] Exemplarily, the housing includes a housing body 110 and a lower housing cover 120, the housing body 110 is connected to the lower housing cover 120, and parts of the housing body 110 and the lower housing cover 120 are used to contain oil to form an oil pool 130. The second intercepting member 600 is located between the cylinder body 300 and the lower housing cover 120, and the second air permeable hole 610 is provided therein, the aperture of which is smaller than the diameter of the oil particles, and the oil particles cannot pass through, so the oil is intercepted and the gaseous refrigerant is allowed to pass through; the second reflux hole 620 allows the oil to flow back to the oil pool 130.

[0054] Exemplarily, the second intercepting member 600 is a mesh structure, the number of the second air holes 610 is N2, and the number of the second return holes 620 is M2, satisfying 0<M2≤N2.

[0055] Exemplarily, a plurality of second air holes 610 are provided, and the plurality of second air holes 610 are evenly distributed on the second intercepting member 600 . In this way, the gaseous refrigerant can pass through and the pressure in the oil pool 130 can be reduced.

[0056] For example, the upper cylinder cover 210 is provided with a waist-shaped hole, and in the axial projection of the crankshaft 410, the second oil return hole at least partially overlaps with the waist-shaped hole, thereby reducing the resistance in the oil return process.

[0057] Exemplarily, a plurality of second intercepting members 600 are sequentially arranged along the axial direction of the crankshaft 410. Thus, after multiple interceptions by the plurality of second intercepting members 600, the interception effect on the oil is obvious.

[0058] Exemplarily, the second intercepting member 600 is a metal member.

[0059] Optionally, a plurality of second reflow holes 620 are provided, and in the axial projection of the crankshaft 410, the sum S2 of the openings of the plurality of second reflow holes 620 satisfies, S2≤0.1S 总2 , S 总2 is the total area of ​​the second intercepting member 600 .

[0060] Such a configuration can avoid the second return hole 620 having a total opening area that is too large, causing the gaseous refrigerant to carry a large amount of oil through the second intercepting member 600, and can also meet the effect of conducting the gaseous refrigerant and reducing the pressure of the oil pool 130.

[0061] Optionally, in the axial direction of the crankshaft 410, the second intercepting member 600 is disposed at a distance H from the lower housing cover 120, satisfying that H 下 ≤H≤H 气 , H 下 H is the distance between the lower cylinder head 220 and the lower shell cover 120, 气 It is the distance between the lower end surface of the cylinder body 300 and the lower shell cover 120.

[0062] Optionally, the second intercepting member 600 is welded and fixed to the inner peripheral wall of the shell. Exemplarily, the peripheral edge of the second intercepting member 600 is welded and fixed to the peripheral edge of the shell body 110.

[0063] Optionally, a second avoidance hole 630 is opened at the center of the second intercepting member 600, and the diameter of the second avoidance hole 630 is D1, D1-D 下 =△D, 0≤△D≤2mm, D 下 is the diameter of the lower cylinder cover 220. In this way, the lower cylinder cover 220 is conveniently inserted into the second intercepting member 600, and the gap between the lower cylinder cover 220 and the second intercepting member 600 can prevent the lower cylinder cover 220 and the second intercepting member 600 from being squeezed when they are installed, resulting in deformation of the second reflux hole 620 and / or the second vent hole 610 on the second intercepting member 600.

[0064] Optionally, in the axial projection of the crankshaft 410 , the first return holes 520 and the second return holes 620 are arranged alternately. This arrangement allows the gaseous refrigerant entrained with oil to always pass through the first intercepting member 500 and / or the second intercepting member 600 to prevent the oil from escaping smoothly from the oil pool 130 .

[0065] Optionally, the first reflux hole 520 is opened in the middle of the first intercepting member 500, the circumferential edge of the first intercepting member 500 forms a first platform, and the middle of the first intercepting member 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 reflux hole 520.

[0066] In this way, after the refluxed oil drops on the first intercepting member 500 , it can automatically gather to the first reflow hole 520 under the action of gravity and return to the oil pool 130 through the first reflow hole 520 , avoiding the oil from staying in the first intercepting member 500 and blocking the first air hole 510 .

[0067] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A compressor, characterized in that include: A housing, the bottom of which forms an oil pool (130); an upper cylinder cover (210) and a lower cylinder cover (220), wherein the upper cylinder cover (210) and the lower cylinder cover (220) are installed in the housing, and the upper cylinder cover (210) is located on a side of the lower cylinder cover (220) facing away from the oil pool (130); A cylinder body (300), wherein the cylinder body (300) is sandwiched between the upper cylinder cover (210) and the lower cylinder cover (220); A crankshaft (410) and a piston (420), wherein the crankshaft (410) is disposed through the upper cylinder cover (210) and the lower cylinder cover (220) and is rotatable, a portion of the crankshaft (410) is insertable into the oil pool (130), and the piston (420) moves in the cylinder body (300) under the drive of the crankshaft (410); A first intercepting member (500) is disposed on a side of the upper cylinder cover (210) facing away from the lower cylinder cover (220), and the first intercepting member (500) is provided with a first air vent (510), a first avoidance hole (530) and a first reflux hole (520). The aperture d of the first air vent (510) is less than or equal to d0, where d0 is the diameter of the oil particles.

2. The compressor according to claim 1, characterized in that A plurality of the first reflow holes (520) are provided, and the sum of the areas of the plurality of the first reflow holes (520) in the axial projection of the crankshaft (410) is S1, which satisfies the following conditions: S1≤0.15S 总1 , S 总1 is the total area of ​​the first intercepting member (500).

3. The compressor according to claim 2, characterized in that The first intercepting member (500) is connected to the upper cylinder cover (210) via a threaded fastener, and the threaded fastener is inserted into the skirt position of the upper cylinder cover (210); Alternatively, the first intercepting member (500) is fixed to the inner peripheral wall of the shell by welding.

4. The compressor according to claim 1, characterized in that The invention also includes a second intercepting member (600), wherein the oil pool (130) is arranged at the lower shell cover (120) of the shell, and the second intercepting member (600) is arranged between the cylinder body (300) and the lower shell cover (120). The second intercepting member (600) is provided with a second air vent (610) and a second reflux hole (620), and the aperture d2 of the second air vent (610) satisfies d2≤d0.

5. The compressor according to claim 4, characterized in that A plurality of the second return holes (620) are provided, and in the axial projection of the crankshaft (410), the sum S2 of the openings of the plurality of the second return holes (620) satisfies, S2≤0.1S 总2 , S 总2 is the total area of ​​the second intercepting member (600).

6. The compressor according to claim 4, characterized in that 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 that H 下 ≤H≤H 气 , H 下 H is the distance between the lower cylinder cover (220) and the lower shell cover (120), 气 is the distance between the lower end surface of the cylinder body (300) and the lower shell cover (120).

7. The compressor according to claim 4, characterized in that The second intercepting member (600) is fixed to the inner peripheral wall of the shell by welding.

8. The compressor according to claim 4, characterized in that A second avoidance hole (630) is provided at the center of the second intercepting member (600), and the diameter of the second avoidance hole (630) is D1, D1-D 下 =△D, 0≤△D≤2mm, D 下 is the diameter of the lower cylinder cover (220).

9. The compressor according to claim 4, characterized in that In the axial projection of the crankshaft (410), the first return holes (520) and the second return holes (620) are arranged alternately.

10. The compressor according to any one of claims 1 to 9, characterized in that: The first reflux hole (520) is opened in the middle of the first intercepting member (500), the circumferential edge of the first intercepting member (500) forms a first platform, and the middle of the first intercepting member (500) forms a second platform. The first platform and the second platform are connected by a guide surface. Under the action of gravity, oil can flow from the first platform to the second platform and pass through the first reflux hole (520).

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