Liquid accumulator and compressor

Abstract

The invention relates to the technical field of compressors, in particular to a liquid storage device and a compressor, and aims to solve the problem that in the related technology, the effect of a hemispherical flow guide device on the aspect of reducing impact force is limited and needs to be further improved. The liquid storage device comprises a shell, wherein a shell inlet is formed in the top of the shell; the bionic flow guide device is arranged in the shell and comprises a plane part, a flow guide part and a guide-out part; wherein the plane part is transversely arranged; the drainage part is located in the center of the plane part and extends in the direction of the inlet of the shell, the outer surface of the drainage part is a round-mouth fish head-imitated streamline curved surface formed by rotating around the axis of the drainage part, and the inner diameter of the round-mouth fish head-imitated streamline curved surface is gradually increased in the direction from the inlet of the shell to the bionic flow guide device; the top of the drainage part is a curved surface; the leading-out part penetrates through the plane part. According to the liquid storage device, the impact force of the refrigerant can be reduced, and impact atomization can be prevented.

Description

Technical Field

[0001] This application relates to the field of compressor technology, specifically providing a liquid receiver and a compressor. Background Technology

[0002] Currently, the receiver is a crucial component of rotary compressors, typically located on one side of the compressor. Its primary function is to separate the oil-gas mixture from the evaporator. The gaseous refrigerant separated by the receiver enters the compressor, while the separated oil accumulates at the bottom of the receiver, preventing liquid refrigerant from directly entering the compressor and causing liquid slugging that could damage it. During the oil-gas separation process in the receiver, intense turbulence occurs, easily creating flow resistance. This leads to a decrease in the receiver outlet pressure, resulting in reduced overall compressor performance and power consumption.

[0003] Related technologies typically incorporate a hemispherical flow guide device inside the receiver to direct the refrigerant from the suction pipe into the receiver's interior, thereby reducing impact force and atomization. However, the effectiveness of this hemispherical flow guide device in reducing impact force is limited and requires further improvement.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] This application aims to solve the aforementioned technical problem, namely, to address the limitation of hemispherical flow guiding devices in reducing impact force in related technologies, which requires further improvement.

[0006] This application provides a liquid reservoir, comprising: a housing with a housing inlet at its top; and a biomimetic flow guiding device disposed within the housing, comprising a planar portion, a flow guiding portion, and a flow discharging portion; wherein the planar portion is arranged laterally; the flow guiding portion is located at the center of the planar portion and extends toward the housing inlet, the outer surface of the flow guiding portion is a streamlined curved surface resembling a round-mouthed fish head formed by rotating around its own axis, the inner diameter of the streamlined curved surface gradually increases along the direction from the housing inlet to the biomimetic flow guiding device, and the top of the flow guiding portion is set as a curved surface; the flow discharging portion penetrates the planar portion.

[0007] In some embodiments, the outer surface of the drainage portion is formed by rotating a first curve to establish a coordinate system with the center point of the planar portion as the origin. The Z-axis of the coordinate system is perpendicular to the planar portion and its positive direction points to the housing inlet. The X-axis and Y-axis are two mutually perpendicular directions on the plane where the planar portion is located. The first curve satisfies the following formula:

[0008]

[0009] Wherein, -0.22R≤t≤8.12R, R is the radius of the planar part, Z1≥0, 2.58≤a1≤2.6, 6≤a2≤6.1, 6.3≤a3≤6.34, 1.19≤a4≤1.22, 0.15R≤a5≤0.24R.

[0010] In some embodiments, the surface of the drainage section facing the housing inlet is provided with a plurality of micro-protrusion units, the micro-protrusion units being crescent-shaped dunes, the crescent-shaped dunes including a crescent-shaped bottom surface, a windward slope and a leeward slope, and along the refrigerant flow direction, the two ends of the crescent-shaped dunes extend upstream of the refrigerant flow, the windward slope facing the housing inlet.

[0011] In some embodiments, the crescent-shaped dune has a plane of symmetry, and the two ends of the crescent-shaped dune are symmetrically arranged along the plane of symmetry; the windward slope is enclosed by a first curve and a second curve, the first curve being located on the side of the second curve closer to the shell inlet; the leeward slope is enclosed by the second curve and a third curve; and the bottom surface is enclosed by the first curve and the third curve; wherein, d1 is the length of the line segment connecting the two endpoints of the first curve, the orthographic projection of the second curve onto the bottom surface is a fourth curve, d2 is the maximum distance between the line segment and the fourth curve, h1 is the maximum distance between the bottom surface and the second curve, 0.01≤d1 / R≤0.04, 1.6≤d1 / d2≤3.2, 0.2≤h1 / d2≤0.35.

[0012] In some embodiments, r1 is the maximum angle formed by the intersection of the windward slope and the bottom surface, and r2 is the angle formed by the intersection of one end of the second curve and the bottom surface, wherein 30°≤r1≤55° and 10°≤r2≤20°.

[0013] In some embodiments, the surface area of ​​the drainage portion is S1, and the sum of the areas of the bottom surfaces of the plurality of micro-convex units is S2, wherein 1 / 8 ≤ S2 / S1 ≤ 1 / 2.

[0014] In some embodiments, the orthographic projection of the drainage portion onto the planar portion is a circle, and multiple sets of micro-convex units are provided. The multiple sets of micro-convex units are arranged at radial intervals along the drainage portion, and multiple micro-convex units in each set are arranged at circumferential intervals along their respective circles.

[0015] In some embodiments, adjacent groups of micro-protrusion units are arranged correspondingly or staggered; or, along the radial direction of the drainage portion, the spacing between adjacent groups of micro-protrusion units increases.

[0016] In some embodiments, the bottom of the housing is provided with a housing outlet; the liquid reservoir includes: a connecting pipe assembly, including an upper connecting pipe and a lower connecting pipe, the upper connecting pipe communicating with the housing inlet, the inlet end of the lower connecting pipe extending to the bottom of the biomimetic flow guiding device, and the outlet end of the lower connecting pipe extending from the housing outlet to the outside of the housing.

[0017] The present invention also provides a compressor, the compressor including the above-described liquid receiver.

[0018] With the above technical solution adopted, the liquid receiver provided in this application has a biomimetic flow guiding device inside the shell. The biomimetic flow guiding device includes a planar part, a flow guiding part, and a flow discharging part. The planar part supports the biomimetic flow guiding device and can also divide the internal space of the shell. The flow guiding part adopts a streamlined curved surface that resembles the head of a round-mouthed fish. This streamlined curved surface draws on the low flow resistance of the fish's head and has a continuous, smooth, and gently transitioning drag-reducing curve. It can guide the high-speed inflowing refrigerant to flow along its surface, guide the fluid to turn smoothly, and reduce the impact force between the refrigerant and the flow guiding part, thereby helping to reduce impact atomization. The flow discharging part penetrates through the planar part and can guide the refrigerant above the planar part to below the planar part. Attached Figure Description

[0019] The preferred embodiments of this application are described below with reference to the accompanying drawings, in which:

[0020] Figure 1 This is a schematic diagram of the liquid reservoir in this application;

[0021] Figure 2 This is a schematic diagram of the biomimetic flow guiding device in this application;

[0022] Figure 3 This is a schematic diagram of the coordinates of the first curve in this application;

[0023] Figure 4 This is a schematic diagram of the micro-convex unit structure in this application;

[0024] Figure 5 yes Figure 4 A cross-sectional schematic diagram of a micro-convex element along its plane of symmetry;

[0025] Figure 6 yes Figure 4 Top view of the micro-convex element;

[0026] Figure 7 This is a schematic diagram of the distribution of micro-convex units;

[0027] Figure 8 This is another schematic diagram of the distribution of micro-convex units;

[0028] Figure 9 This is another schematic diagram of the distribution of micro-convex units;

[0029] Figure 10 This is another schematic diagram of the distribution of micro-convex units;

[0030] Figure 11 These are the simulation calculation results of the pressure drop of the reservoir in Example 1;

[0031] Figure 12 The results are simulation calculations of the pressure drop in the reservoir in the comparative example.

[0032] Figure 13 The results are simulation calculations of the turbulent kinetic energy inside the reservoir in Example 1.

[0033] Figure 14 This is the simulation result of the turbulent kinetic energy inside the liquid reservoir in the comparative example.

[0034] List of reference numerals in the attached diagram:

[0035] 100. Shell; 200. Bionic flow guiding device; 201. Planar part; 202. Flow guiding part; 203. Flow guiding part; 300. Micro-convex unit; 301. Windward slope; 302. First curve; 303. Second curve; 304. Leeward slope; 305. Third curve; 306. Fourth curve; 307. Bottom surface; 400. Connecting pipe assembly; 401. Upper connecting pipe; 402. Lower connecting pipe. Detailed Implementation

[0036] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. It should be noted that in the description of this application, terms such as "upper," "lower," "inner," "bottom," and "end," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation of this application.

[0037] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "set up," "connect," and "connect" 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, a direct connection, or an indirect connection through an intermediate medium; or 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 application according to the specific circumstances.

[0038] In one aspect, this application provides a liquid reservoir.

[0039] Combination Figure 1 and Figure 2 As shown, the liquid reservoir provided in this application includes a housing 100 and a biomimetic flow guiding device 200.

[0040] The top of the housing 100 is provided with a housing inlet.

[0041] The biomimetic flow guiding device 200 is disposed inside the housing 100, and the biomimetic flow guiding device 200 includes a planar part 201, a flow guiding part 202 and a flow discharging part 203.

[0042] The planar portion 201 is arranged horizontally. The drainage portion 202 is located at the center of the planar portion 201 and extends towards the direction of the shell inlet. The outer surface of the drainage portion 202 is a streamlined curved surface resembling a round-mouthed fish head, formed by rotating around its own axis. Along the direction from the shell inlet to the biomimetic flow guide device 200, the inner diameter of the streamlined curved surface gradually increases, and the curvature of the streamlined curved surface is greater than the curvature of the first circle. The first circle has the center point of the drainage portion 202 as its center and the distance between the top and bottom surfaces of the drainage portion 202 as its radius. The top of the drainage portion 202 is set as a curved surface. The outlet portion 203 penetrates through the planar portion 201. The streamlined curved surface resembling a round-mouthed fish head is used to simulate the head shape of round-mouthed fish such as crucian carp. Round-mouthed fish refer to fish with approximately round mouths, such as crucian carp. In contrast to round-mouthed fish are pointed-mouthed fish, which have long and sharp mouths, such as swordfish.

[0043] With the above technical solution adopted, the liquid reservoir provided in this application has a biomimetic flow guiding device 200 inside the housing 100. The biomimetic flow guiding device 200 includes a planar part 201, a flow guiding part 202, and a discharge part 203. The planar part 201 is used to support the biomimetic flow guiding device 200 and can also divide the internal space of the housing 100. The flow guiding part 202 adopts a streamlined curved surface that imitates the head of a round-mouthed fish. This streamlined curved surface that imitates the head of a round-mouthed fish draws on the low flow resistance of the biological contour features of the head of a round-mouthed fish. It has a continuous, smooth, and gently transitioning drag-reducing curve, which can guide the high-speed inflowing refrigerant to flow along its surface, guide the fluid to turn smoothly, and reduce the impact force between the refrigerant and the flow guiding part 202, thereby helping to reduce impact atomization. The discharge part 203 penetrates through the planar part 201 and can guide the refrigerant above the planar part 201 to below the planar part 201.

[0044] Optionally, combined Figure 2As shown, multiple outlet sections 203 are evenly arranged circumferentially along the planar section 201. A connecting port is provided on the planar section 201, and the outlet sections 203 are disposed within the connecting port. The top end of the outlet section 203 is flush with the connecting port, and the bottom end of the outlet section 203 extends downwards away from the housing inlet. Along the vertically downward direction, the outlet section 203 has an arc surface with a gradually decreasing inner diameter. A connecting port is provided on one side of the outlet section 203. It can be understood that the connecting port is located below the planar section. With this arrangement, the outlet sections 203 act as flow guides, allowing the refrigerant to rotate and flow circumferentially along the receiver, thereby generating centrifugal force. Since the refrigerant is generally an oil-gas mixture, and the density of the oil and refrigerant is different, different centrifugal forces are generated, thus achieving oil-gas separation. The gaseous refrigerant flows into the compressor, and the liquid oil is separated and stored in the receiver.

[0045] In some embodiments, combined with Figure 1 As shown, the bottom of the housing 100 is provided with a housing outlet; the liquid receiver includes a connecting pipe assembly 400. The connecting pipe assembly 400 includes an upper connecting pipe 401 and a lower connecting pipe 402. The upper connecting pipe 401 is connected to the housing inlet, the inlet end of the lower connecting pipe 402 extends to the bottom of the bionic flow guiding device 200, and the outlet end of the lower connecting pipe 402 extends from the housing outlet to the outside of the housing 100. This arrangement can achieve the function of oil-gas separation in the liquid receiver. Specifically, the gas-liquid mixture of refrigerant can be introduced into the interior of the housing 100 through the upper connecting pipe 401. Under the guidance of the bionic flow guiding device 200, the refrigerant flows downward along its surface and flows through the outlet 203 to the lower side of the bionic flow guiding device 200. Then, the liquid refrigerant settles to the bottom of the housing 100 under the action of gravity, and the gaseous refrigerant is drawn and transported to the compressor through the lower connecting pipe 402. The inlet end of the lower connecting pipe 402 extends below the bionic flow guiding device 200, which can reduce the amount of liquid refrigerant drawn into the lower connecting pipe 402 and help improve the oil-gas separation effect of the liquid receiver.

[0046] In some embodiments, combined with Figure 2 and Figure 3 As shown, the outer surface of the drainage part 202 is formed by rotating the first curve 302. A coordinate system is established with the center point o of the planar part 201 as the origin. The Z-axis of the coordinate system is perpendicular to the planar part 201 and its positive direction points to the shell inlet. The X-axis and Y-axis are two mutually perpendicular directions on the plane where the planar part 201 is located.

[0047] The first curve 302 satisfies the following formula:

[0048]

[0049] Where -0.22R≤t≤8.12R, R is the radius of the planar part 201, Z1≥0, 2.58≤a1≤2.6, 6≤a2≤6.1, 6.3≤a3≤6.34, 1.19≤a4≤1.22, 0.15R≤a5≤0.24R.

[0050] By making the first curve 302 satisfy the above formula, the biological contour characteristics of the low flow resistance of the fish head can be better simulated. The drainage part 202 can transform the impact of the refrigerant from a frontal collision to a wall-adhering flow, effectively guiding the refrigerant impact, reducing the obstruction of the refrigerant impact by the drainage part 202, and helping to reduce impact atomization.

[0051] In the exemplary embodiment, the specific extension trend of the first curve 302 is not fixed. Those skilled in the art can flexibly set it as needed, as long as it can be rotated around its own axis to form a streamlined curved surface resembling a round-mouthed fish head.

[0052] In the exemplary embodiment, a1, a2, a3, a4, and a5 are not fixed and can be flexibly set by those skilled in the art as needed. For example, a1 can be 2.59, 2.593, 2.596, or 2.6, etc.; a2 can be 6.01, 6.0192, 6.05, 6.08, or 6.1, etc.; a3 can be 6.30, 6.32, 6.33, or 6.34, etc.; a4 can be 1.19, 1.20, 1.21, or 1.22, etc.; and a5 can be 0.15R, 0.17R, 0.18R, 0.20R, 0.22R, or 0.24R, etc. a1, a2, a3, a4, and a5 are biomimetic contour shape coefficients that can affect the shape and direction of the first curve 302. By limiting a1, a2, a3, a4, and a5 to the above ranges, a flow guide 202 with low flow resistance can be constructed.

[0053] In one specific implementation, a1 is 2.5904, a2 is 6.0192, a3 is 6.3072, a4 is 1.20976, and a5 is 0.16R.

[0054] In some embodiments, combined with Figure 2 and Figure 4As shown, the surface of the flow guide 202 facing the shell inlet is provided with multiple micro-protrusion units 300. Each micro-protrusion unit 300 is shaped like a crescent-shaped dune, comprising a crescent-shaped base 307, a windward slope 301, and a leeward slope 304. Along the refrigerant flow direction, both ends of the crescent-shaped dune extend upstream of the refrigerant flow. The windward slope 301 of the micro-protrusion unit 300 faces the shell inlet. By providing multiple crescent-shaped micro-protrusion units 300 on the surface of the flow guide 202, with the windward slope 301 of the micro-protrusion units 300 facing the shell inlet, the windward slope 301 can effectively guide the airflow along the wall, reducing impact. Simultaneously, the leeward slope of the micro-protrusion unit 300 can form a stable vortex, orderly dissipating turbulent energy. Multiple micro-convex units 300 working together can form a non-smooth surface in the flow guide 202, which improves the airflow field inside the liquid receiver, reduces turbulence inside the liquid receiver, and reduces its internal flow resistance, thereby reducing the pressure drop inside the liquid receiver, which is beneficial to improving the overall performance and power consumption of the compressor.

[0055] Understandably, crescent dunes are the most basic form of mobile dunes, with a crescent-shaped base extending upstream at both ends. A crescent dune includes a windward and a leeward slope. The windward slope is gentle and long, extending upstream at both ends, while the middle extends towards the leeward side. Similarly, the leeward slope is steep and short, extending upstream at both ends, while the middle extends towards the leeward side.

[0056] In the exemplary embodiment, the micro-protrusion unit 300 is not mandatory, and those skilled in the art can flexibly configure it as needed. For example, the micro-protrusion unit 300 may not be provided.

[0057] In some embodiments, combined with Figure 4 , Figure 5 and Figure 6As shown, the crescent-shaped dune has a plane of symmetry, with both ends symmetrically positioned along this plane. The windward slope 301 is enclosed by a first curve 302 and a second curve 303, and is crescent-shaped. The first curve 302 is located on the side of the second curve 303 closest to the shell inlet. The micro-convex unit 300 includes a leeward slope 304 and a bottom surface 307. The leeward slope 304 is enclosed by a second curve 303 and a third curve 305, and is crescent-shaped. The bottom surface 307 is enclosed by a first curve 302 and a third curve 305, and is crescent-shaped. Wherein, d1 is the length of the line segment connecting the two endpoints of the first curve 302, the orthographic projection of the second curve 303 onto the bottom surface 307 is the fourth curve 306, d2 is the maximum distance between the line segment and the fourth curve 306, and h1 is the maximum distance between the bottom surface 307 and the second curve 303, wherein 0.01≤d1 / R≤0.04, 1.6≤d1 / d2≤3.2, and 0.2≤h1 / d2≤0.35.

[0058] By limiting d1 / R within the above range, the micro-convex unit 300 can have a suitable size. If d1 / R is lower than the lower limit, the overall size of the micro-convex unit 300 is too small, and the drag reduction effect of a single micro-convex unit 300 is difficult to achieve. If d1 / R is higher than the upper limit, the overall size of the micro-convex unit is too large, resulting in a reduction in the number of micro-convex units in the drainage part 202, which will affect the synergistic aggregation effect of the number of micro-convex units 300.

[0059] By limiting d1 / d2 to the aforementioned range, the aspect ratio of the micro-convex element 300 can be kept within a reasonable range, which helps to ensure the drag reduction effect of the micro-convex element 300. If d1 / d2 is lower than the lower limit, the micro-convex element 300 is too short and thick, increasing the difficulty of inducing vortex formation on the leeward slope 304; if d1 / d2 is higher than the upper limit, the micro-convex element 300 is too slender, increasing the ineffective area and reducing the coverage and overall effect.

[0060] By limiting h1 / d2 to the aforementioned range, the ratio between the windward slope 301 and the leeward slope 304 of the micro-convex unit 300 can be kept within a reasonable range. If h1 / d2 is below the lower limit, the height of the leeward slope 304 is designed too small, the large-scale turbulent kinetic energy is broken up to form a smaller-scale vortex effect, and the energy dissipation is reduced; if h1 / d2 is above the upper limit, the height of the windward slope 301 is designed too large, which may lead to increased flow obstruction and the generation of violent turbulence and large-scale separation vortices.

[0061] In the exemplary embodiment, d1 / R, d1 / d2, and h1 / d2 are not fixed and can be flexibly set by those skilled in the art as needed. For example, d1 / R can be 0.01, 0.02, 0.03, or 0.04, etc.; d1 / d2 can be 1.6, 1.8, 2.0, 2.3, 2.5, 2.9, 3.0, 3.1, or 3.2, etc.; and h1 / d2 can be 0.2, 0.25, 0.27, 0.30, 0.32, 0.33, or 0.35, etc.

[0062] In some embodiments, combined with Figure 4 , Figure 5 and Figure 6 As shown, r1 is the maximum angle formed by the intersection of the windward slope 301 and the bottom surface 307, and r2 is the angle formed by the intersection of one end of the second curve 303 and the bottom surface 307, where 30°≤r1≤55° and 10°≤r2≤20°.

[0063] By limiting r1 to the above range, the slope of the windward slope 301 can be kept within a reasonable range. If r1 is lower than the lower limit, the concave slope design of the windward slope 301 is too small, making it more difficult to induce the formation of a stable vortex zone; if r1 is higher than the upper limit, the normal component of the fluid flowing through the windward slope 301 increases, which can easily cause impact and atomization.

[0064] By limiting r2 within the aforementioned range, the slope of the windward slope 301 can be kept within a reasonable range. If r2 is below the lower limit, the slope design of the outward expansion surface of the windward slope 301 is too small, making it more difficult to induce the formation of a stable vortex zone; if r2 is above the upper limit, the slope of the outward expansion surface of the windward slope 301 increases, and the relative velocity between the fluid and the wall increases along the normal component of the wall, which can easily cause impact and atomization.

[0065] In the exemplary embodiment, r1 and r2 are not fixed and can be flexibly set by those skilled in the art as needed. For example, r1 can be 30°, 35°, 40°, 45°, 50° or 55°, etc.; r2 can be 10°, 13°, 17°, 19° or 20°, etc.

[0066] In some embodiments, the surface area of ​​the drainage portion 202 is S1, which is the total surface area including the portion overlapping with the bottom surface 307; the sum of the areas of the bottom surfaces 307 of the plurality of micro-protrusion units 300 is S2, wherein 1 / 8 ≤ S2 / S1 ≤ 1 / 2. By limiting S2 / S1 to the above range, a non-smooth surface is formed by covering the drainage portion 202 with suitable micro-protrusion units 300. The plurality of micro-protrusion units 300 form a synergistic aggregation effect, which can change the airflow field inside the reservoir, thereby reducing turbulence, lowering flow resistance, and alleviating atomization.

[0067] In the exemplary embodiment, S2 / S1 is not fixed and can be flexibly set by those skilled in the art as needed. For example, S2 / S1 can be 1 / 8, 1 / 7, 1 / 6, 1 / 5, 1 / 4, 1 / 3, or 1 / 2, etc.

[0068] In some embodiments, combined with Figure 2 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the orthographic projection of the flow guide 202 onto the planar portion 201 is circular. Multiple sets of micro-convex units 300 are provided, arranged radially at intervals along the flow guide 202. Within each set, multiple micro-convex units 300 are arranged circumferentially at intervals along their respective circles. This arrangement allows the multiple micro-convex units 300 to work synergistically, improving the airflow field inside the reservoir, thereby achieving greater drag reduction, more effective impact atomization, and lower turbulent dissipation.

[0069] In some embodiments, combined with Figure 2 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, adjacent sets of micro-convex units 300 are arranged correspondingly or alternately to form... Figure 8 The rectangular array shown or Figure 7 The diamond array shown Figure 10 The leaf sequence array shown; or, along the radial direction of the drainage portion 202, the spacing between adjacent groups of micro-convex units 300 increases, forming... Figure 9 The diagram shows an arithmetic progression array. This arrangement, with multiple micro-convex units 300 arrayed together, allows them to work synergistically to improve the airflow field inside the reservoir, thereby achieving greater drag reduction, more effective shock atomization, and lower turbulent dissipation.

[0070] Secondly, this application provides a compressor. The compressor includes the liquid receiver of any of the above-mentioned embodiments. It is understood that the outlet of the lower connecting pipe 402 of the liquid receiver is connected to the suction port of the compressor.

[0071] With the above technical solution adopted, the compressor receiver provided in this application has a biomimetic flow guiding device 200 inside the housing 100. The biomimetic flow guiding device 200 includes a planar part 201, a flow guiding part 202, and a discharge part 203. The planar part 201 is used to support the biomimetic flow guiding device 200 and can also divide the internal space of the housing 100. The flow guiding part 202 adopts a streamlined curved surface that resembles the head of a round-mouthed fish. This streamlined curved surface that resembles the head of a round-mouthed fish draws on the low flow resistance of the biological contour features of the head of a round-mouthed fish. It has a continuous, smooth, and gently transitioning drag-reducing curve, which can guide the high-speed inflowing refrigerant to flow along its surface, guide the fluid to turn smoothly, and reduce the impact force between the refrigerant and the flow guiding part 202, thereby helping to reduce impact atomization. The discharge part 203 penetrates through the planar part 201 and can guide the refrigerant above the planar part 201 to below the planar part 201.

[0072] The effects of this application are illustrated below with reference to specific embodiments and comparative test data:

[0073] Example 1

[0074] An embodiment provides a liquid reservoir, which includes a housing 100 and a biomimetic flow guiding device 200.

[0075] The top of the housing 100 is provided with a housing inlet.

[0076] The biomimetic flow guiding device 200 is disposed inside the housing 100, and the biomimetic flow guiding device 200 includes a planar part 201, a flow guiding part 202 and a flow discharging part 203.

[0077] The planar portion 201 is arranged horizontally; the drainage portion 202 is located at the center of the planar portion 201 and extends towards the direction of the shell inlet; the outer surface of the drainage portion 202 is a streamlined curved surface resembling a round-mouthed fish head formed by rotating the first curve 302; the top of the drainage portion 202 is set as a curved surface; and the outlet portion 203 penetrates the planar portion 201.

[0078] The first curve 302 satisfies the following formula:

[0079]

[0080] Wherein, -0.22R≤t≤8.12R, R is 33.5mm, Z1≥0, a1 is 2.5904, a2 is 6.0192, a3 is 6.3072, a4 is 1.20976, and a5 is 5.5.

[0081] The surface area S1 of the drainage section 202 is 1170 mm². 2 The sum of the areas S2 of the bottom surfaces 307 of the multiple micro-convex units 300 is 180 mm. 2 .

[0082] Comparative Example

[0083] A comparative example provides a liquid reservoir, which differs from Example 1 in that the drainage portion 202 is hemispherical.

[0084] Test case

[0085] The pressure drop between the inlet and outlet of the liquid reservoir and the turbulent kinetic energy inside the reservoir were calculated using fluid simulation. The inlet velocity of the liquid reservoir was set to 30 m / s. 2 .

[0086] Test results are as follows Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, compared to the hemispherical shape of the drainage section 202 in the comparative example, the impact high-pressure zone of the biomimetic drainage section 202 in Example 1 shows a decreasing trend. The internal turbulent kinetic energy of the reservoir in Example 1 is 26 J / kg, while that in the comparative example is 34.6 J / kg. The turbulent kinetic energy decreases from 34.6 J / kg to 26 J / kg, a reduction of approximately 24.9%. The pressure drop between the inlet and outlet of the reservoir in Example 1 is 2439 Pa, while that in the comparative example is 2444 Pa. The pressure drop decreases from 2444 Pa to 2439 Pa, a reduction in flow resistance of approximately 0.2%. Therefore, the reservoir provided in this application is beneficial for reducing its internal flow resistance and pressure drop.

[0087] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0088] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A liquid reservoir, characterized in that, The liquid reservoir includes: A housing (100) having a housing inlet at its top; A biomimetic flow guiding device (200) is disposed inside the housing (100) and includes a planar part (201), a flow guiding part (202) and a flow outlet part (203). The planar portion (201) is arranged laterally; The drainage section (202) is located at the center of the planar section (201) and extends toward the direction of the shell inlet. The outer surface of the drainage section (202) is a streamlined curved surface resembling a round-mouthed fish head formed by rotating around its own axis. Along the direction from the shell inlet to the bionic flow guiding device (200), the inner diameter of the streamlined curved surface resembling a round-mouthed fish head gradually increases. The top of the drainage section (202) is set as a curved surface. The outlet portion (203) extends through the planar portion (201).

2. The liquid reservoir according to claim 1, characterized in that, The outer surface of the drainage part (202) is formed by rotating the first curve (302). A coordinate system is established with the center point of the planar part (201) as the origin. The Z-axis of the coordinate system is perpendicular to the planar part (201) and its positive direction points to the inlet of the shell. The X-axis and Y-axis are two mutually perpendicular directions on the plane where the planar part (201) is located. The first curve (302) satisfies the following formula: Wherein, -0.22R≤t≤8.12R, R is the radius of the planar part (201), Z1≥0, 2.58≤a1≤2.6, 6≤a2≤6.1, 6.3≤a3≤6.34, 1.19≤a4≤1.22, 0.15R≤a5≤0.24R.

3. The liquid reservoir according to claim 1, characterized in that, The surface of the flow-in portion (202) facing the housing inlet is provided with a plurality of micro-protrusion units (300). The micro-protrusion units (300) are crescent-shaped sand dunes. The crescent-shaped sand dune shape includes a bottom surface (307), a windward slope (301), and a leeward slope (304) that are all crescent-shaped. Along the flow direction of the refrigerant, the two ends of the crescent-shaped sand dune shape extend to the upstream side of the refrigerant flow. The windward slope (301) faces the housing inlet.

4. The liquid reservoir according to claim 3, characterized in that, The crescent-shaped dune has a symmetrical plane, and the two ends of the crescent-shaped dune are symmetrically arranged along the symmetrical plane; the windward slope (301) is formed by a first curve (302) and a second curve (303), the first curve (302) being located on the side of the second curve (303) closer to the shell inlet; the leeward slope (304) is formed by the second curve (303) and a third curve (305); the bottom surface (307) is formed by the first curve (302) and the third curve (305). The curve is enclosed by the following: d1 is the length of the line segment connecting the two endpoints of the first curve (302), the orthographic projection of the second curve (303) onto the bottom surface (307) is the fourth curve (306), d2 is the maximum distance between the line segment and the fourth curve (306), h1 is the maximum distance between the bottom surface (307) and the second curve (303), 0.01≤d1 / R≤0.04, 1.6≤d1 / d2≤3.2, 0.2≤h1 / d2≤0.

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5. The liquid reservoir according to claim 4, characterized in that, r1 is the maximum angle formed by the intersection of the windward slope (301) and the bottom surface (307), and r2 is the angle formed by the intersection of one end of the second curve (303) and the bottom surface (307), wherein 30°≤r1≤55° and 10°≤r2≤20°.

6. The liquid reservoir according to claim 4, characterized in that, The surface area of ​​the drainage part (202) is S1, and the sum of the areas of the bottom surfaces (307) of the plurality of micro-convex units (300) is S2, wherein 1 / 8≤S2 / S1≤1 / 2.

7. The liquid reservoir according to claim 3, characterized in that, The orthographic projection of the drainage portion (202) on the planar portion (201) is circular. Multiple sets of micro-convex units (300) are provided. Multiple sets of micro-convex units (300) are arranged at radial intervals along the drainage portion (202). Multiple micro-convex units (300) in each set are arranged at circumferential intervals along the circle in which they are located.

8. The liquid reservoir according to claim 7, characterized in that, The adjacent sets of micro-convex units (300) are arranged correspondingly or staggered; or, along the radial direction of the drainage portion (202), the spacing between the adjacent sets of micro-convex units (300) increases.

9. The reservoir according to any one of claims 1 to 8, characterized in that, The bottom of the housing (100) is provided with a housing outlet; the liquid reservoir includes: The connecting pipe assembly (400) includes an upper connecting pipe (401) and a lower connecting pipe (402), the upper connecting pipe (401) being connected to the housing inlet, the inlet end of the lower connecting pipe (402) extending below the bionic flow guide device (200), and the outlet end of the lower connecting pipe (402) extending from the housing outlet to the outside of the housing (100).

10. A compressor, characterized in that, The compressor includes the liquid receiver according to any one of claims 1 to 9.

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